filename
stringlengths 18
19
| title
stringlengths 7
950
| abstract
stringlengths 105
36k
| @id
stringlengths 71
788
| sameAs
stringlengths 6
866
| text
stringlengths 285
36.2k
|
|---|---|---|---|---|---|
3A843619546.jsonld | ['Sample supervised search centric approaches in geographic object-based image analysis'] | ['Sample supervised search centric image segmentation denotes a general method where quality segments are generated based on the provision of a selection of reference segments. The main purpose of such a method is to correctly segment a multitude of identical elements in an image based on these reference segments. An efficient search algorithm traverses the parameter space of a given segmentation algorithm. A supervised quality measure guides the search for the best segmentation results, or rather the best performing parameter set. This method, which is academically pursued in the context of remote sensing and elsewhere, shows promise in assisting the generation of earth observation information products. The method may find applications specifically within the context of user driven geographic object-based image analysis approaches, mainly in respect of very high resolution optical data. Rapid mapping activities as well as general land-cover mapping or targeted element identification may benefit from such a method. In this work it is suggested that sample supervised search centric geographic segment generation forms the basis of a set of methods, or rather a methodological avenue. The original formulation of the method, although promising, is limited in the quality of the segments it can produce – it is still limited by the inherent capability of the given segmentation algorithm. From an optimisation viewpoint, various structures may be encoded forming the fitness or search landscape traversed by a given search algorithm. These structures may interact or have an interplay with the given segmentation algorithm. Various method variants considering expanded fitness landscapes are possible. Additional processes, or constituents, such as data mapping, classification and post-segmentation heuristics may be embedded into such a method. Three distinct and novel method variants are proposed and evaluated based on this concept of expanded fitness landscapes.'] | ['gnd:1081117737', 'gnd:36164-1', 'gnd:4116326-6', 'gnd:4145448-0', 'gnd:4224344-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A843619546'] | ['Fourie, Christoffel', 'Friedrich-Schiller-Universität Jena', 'Satellitenbildauswertung', 'Bildsegmentierung', 'Satellitenfernerkundung'] | Document
### Title: ['Sample supervised search centric approaches in geographic object-based image analysis']
### Abstract:
['Sample supervised search centric image segmentation denotes a general method where quality segments are generated based on the provision of a selection of reference segments. The main purpose of such a method is to correctly segment a multitude of identical elements in an image based on these reference segments. An efficient search algorithm traverses the parameter space of a given segmentation algorithm. A supervised quality measure guides the search for the best segmentation results, or rather the best performing parameter set. This method, which is academically pursued in the context of remote sensing and elsewhere, shows promise in assisting the generation of earth observation information products. The method may find applications specifically within the context of user driven geographic object-based image analysis approaches, mainly in respect of very high resolution optical data. Rapid mapping activities as well as general land-cover mapping or targeted element identification may benefit from such a method. In this work it is suggested that sample supervised search centric geographic segment generation forms the basis of a set of methods, or rather a methodological avenue. The original formulation of the method, although promising, is limited in the quality of the segments it can produce – it is still limited by the inherent capability of the given segmentation algorithm. From an optimisation viewpoint, various structures may be encoded forming the fitness or search landscape traversed by a given search algorithm. These structures may interact or have an interplay with the given segmentation algorithm. Various method variants considering expanded fitness landscapes are possible. Additional processes, or constituents, such as data mapping, classification and post-segmentation heuristics may be embedded into such a method. Three distinct and novel method variants are proposed and evaluated based on this concept of expanded fitness landscapes.']
### GND ID:
['gnd:1081117737', 'gnd:36164-1', 'gnd:4116326-6', 'gnd:4145448-0', 'gnd:4224344-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A843619546']
### GND class:
['Fourie, Christoffel', 'Friedrich-Schiller-Universität Jena', 'Satellitenbildauswertung', 'Bildsegmentierung', 'Satellitenfernerkundung']
<|eot_id|> |
3A84418408X.jsonld | ['Studies towards a total synthesis of akuammiline alkaloids'] | ['Total synthesis, akuammiline alkaloids, conformational analysis. - Totalsynthese, Akuammilin Alkaloide, Konformationsanalyse'] | ['gnd:4061594-7', 'gnd:4161560-8', 'gnd:4221170-0', 'gnd:4412308-5', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84418408X'] | ['Umlagerung', 'Indolalkaloide', 'Cyclopropanierung', 'Totalsynthese', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Studies towards a total synthesis of akuammiline alkaloids']
### Abstract:
['Total synthesis, akuammiline alkaloids, conformational analysis. - Totalsynthese, Akuammilin Alkaloide, Konformationsanalyse']
### GND ID:
['gnd:4061594-7', 'gnd:4161560-8', 'gnd:4221170-0', 'gnd:4412308-5', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84418408X']
### GND class:
['Umlagerung', 'Indolalkaloide', 'Cyclopropanierung', 'Totalsynthese', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A845335626.jsonld | ['Spectroscopic characterization of ion motion for an optical clock based on Coulomb crystals'] | ['Optical clocks, Coulomb crystals, ultra-stable lasers, spectroscopy. - Optische Uhren, Coulombkristalle, ultrastabile Laser, Spektoskopie'] | ['gnd:108053685X', 'gnd:4034620-1', 'gnd:4148346-7', 'gnd:4162307-1', 'gnd:4163478-0', 'gnd:4326605-8', 'gnd:4403173-7', 'gnd:4670320-2', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845335626'] | ['Optische Uhr', 'Laserspektroskopie', 'Coulomb-Potenzial', 'Ionenbewegung', 'Kation', 'Paul-Falle', 'Indium-115', 'Ytterbium-172', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Spectroscopic characterization of ion motion for an optical clock based on Coulomb crystals']
### Abstract:
['Optical clocks, Coulomb crystals, ultra-stable lasers, spectroscopy. - Optische Uhren, Coulombkristalle, ultrastabile Laser, Spektoskopie']
### GND ID:
['gnd:108053685X', 'gnd:4034620-1', 'gnd:4148346-7', 'gnd:4162307-1', 'gnd:4163478-0', 'gnd:4326605-8', 'gnd:4403173-7', 'gnd:4670320-2', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845335626']
### GND class:
['Optische Uhr', 'Laserspektroskopie', 'Coulomb-Potenzial', 'Ionenbewegung', 'Kation', 'Paul-Falle', 'Indium-115', 'Ytterbium-172', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A845360388.jsonld | ['Fredholm Theory with Applications to Random Operators'] | [['This thesis is concerned with the Fredholm theory of bounded linear operators acting on Banach space valued sequence spaces. As an application, random operators are considered and studied in detail. One of the most important tools in the study of operators on sequence spaces is the concept of limit operators. The correspondence between an operator and its limit operators is studied regarding properties like spectrum, pseudospectrum and numerical range. It turns out that similar theorems can be formulated for all these properties, respectively. These results prove to be particularly useful in the case of random operators. Special attention is directed to the so-called Feinberg-Zee random hopping matrix, which, despite its simple appearance, seems to have a very complicated spectrum. With the help of new methods, improved upper and lower bounds to the spectrum are obtained. One of these lower bounds is an infinite sequence of Julia sets, which emphasizes the complexity of the spectrum of this particular operator.$cen$dAbstract', 'Diese Arbeit befasst sich mit der Fredholmtheorie von beschränkten linearen Operatoren auf banachraumwertigen Folgenräumen. Im Speziellen werden zufällige Operatoren auf ebendiesen Räumen betrachtet. Eines der wichtigsten Hilfsmittel zur Untersuchung von Operatoren auf Folgenräumen ist der Begriff des Grenzoperators. Die Beziehung zwischen einem Operator und seinen Grenzoperatoren wird im Bezug auf Eigenschaften wie Spektrum, Pseudospektrum und numerischer Wertebereich untersucht. Es stellt sich heraus, dass sich für alle diese Eigenschaften jeweils ähnliche Sätze formulieren lassen. Diese Erkenntnisse erweisen sich als besonders nützlich bei der Untersuchung zufälliger Operatoren. Ein besonderes Augenmerk liegt dabei auf der sogenannten Feinberg-Zee Random Hopping Matrix, welche trotz ihrer einfachen Gestalt ein sehr komplexes Spektrum zu haben scheint. Mit der Hilfe neuer Methoden können verbesserte obere und untere Schranken an jenes Spektrum angegeben werden. Eine dieser unteren Schranken ist eine unendliche Folge von Julia-Mengen. Dies unterstreicht die Komplexität des Spektrums jenes Operators.$cde$dAbstract']] | ['gnd:1020928158', 'gnd:1093437146', 'gnd:128642548', 'gnd:16345899-6', 'gnd:4155263-5', 'gnd:4280084-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845360388'] | ['Seidel, Markus', 'Hagger, Raffael', 'Lindner, Marko', 'Technische Universität Hamburg-Harburg, Institut für Mathematik', 'Fredholm-Theorie', 'Zufallsoperator'] | Document
### Title: ['Fredholm Theory with Applications to Random Operators']
### Abstract:
[['This thesis is concerned with the Fredholm theory of bounded linear operators acting on Banach space valued sequence spaces. As an application, random operators are considered and studied in detail. One of the most important tools in the study of operators on sequence spaces is the concept of limit operators. The correspondence between an operator and its limit operators is studied regarding properties like spectrum, pseudospectrum and numerical range. It turns out that similar theorems can be formulated for all these properties, respectively. These results prove to be particularly useful in the case of random operators. Special attention is directed to the so-called Feinberg-Zee random hopping matrix, which, despite its simple appearance, seems to have a very complicated spectrum. With the help of new methods, improved upper and lower bounds to the spectrum are obtained. One of these lower bounds is an infinite sequence of Julia sets, which emphasizes the complexity of the spectrum of this particular operator.$cen$dAbstract', 'Diese Arbeit befasst sich mit der Fredholmtheorie von beschränkten linearen Operatoren auf banachraumwertigen Folgenräumen. Im Speziellen werden zufällige Operatoren auf ebendiesen Räumen betrachtet. Eines der wichtigsten Hilfsmittel zur Untersuchung von Operatoren auf Folgenräumen ist der Begriff des Grenzoperators. Die Beziehung zwischen einem Operator und seinen Grenzoperatoren wird im Bezug auf Eigenschaften wie Spektrum, Pseudospektrum und numerischer Wertebereich untersucht. Es stellt sich heraus, dass sich für alle diese Eigenschaften jeweils ähnliche Sätze formulieren lassen. Diese Erkenntnisse erweisen sich als besonders nützlich bei der Untersuchung zufälliger Operatoren. Ein besonderes Augenmerk liegt dabei auf der sogenannten Feinberg-Zee Random Hopping Matrix, welche trotz ihrer einfachen Gestalt ein sehr komplexes Spektrum zu haben scheint. Mit der Hilfe neuer Methoden können verbesserte obere und untere Schranken an jenes Spektrum angegeben werden. Eine dieser unteren Schranken ist eine unendliche Folge von Julia-Mengen. Dies unterstreicht die Komplexität des Spektrums jenes Operators.$cde$dAbstract']]
### GND ID:
['gnd:1020928158', 'gnd:1093437146', 'gnd:128642548', 'gnd:16345899-6', 'gnd:4155263-5', 'gnd:4280084-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845360388']
### GND class:
['Seidel, Markus', 'Hagger, Raffael', 'Lindner, Marko', 'Technische Universität Hamburg-Harburg, Institut für Mathematik', 'Fredholm-Theorie', 'Zufallsoperator']
<|eot_id|> |
3A845399888.jsonld | ['Ecological immunology and host plant adaptation in lepidopteran herbivores'] | ['Herbivorous insects live in complex environments in which they intimately interact with a broad range of pathogens. Therefore, herbivores require a range of efficient immune defense mechanisms that can cope with all potential pathogens as specifically and immediately as possible. Environments differ in the threats they pose: the risk of exposure to pathogens varies, as well as the pathogenesis of those microorganisms. Therefore, heterogeneous environments of herbivores will generate a complex natural selective pressure on their immune system, possibly causing variations in immune system functions among herbivorous insects. Variation in immune system functions will also impose different costs of defense upon herbivores, leading to complex patterns of trade-offs against other life-history traits, such as sexual traits. The complexity of environments, wherein herbivorous insects and pathogens interact, is also impacted by plants. The evolutionary arms race between plants and their herbivores provides plants with a highly sophisticated defense system. However, the relationship between plants and herbivores cannot be fully understood without incorporating the impact of herbivorous pathogens. We are only beginning to understand the complexity of herbivore - pathogen and herbivore - plant interactions that occur in complex environments. General explanations for both immune system variation and host plant adaptation in herbivorous insects are rare. Most immunological studies on herbivorous insects have almost exclusively focused on physiological and molecular mechanisms of the innate immune system, generally neglecting the fact that herbivores interact with their environment. The aim of this thesis was to examine the importance of insect ecology on immune system variation and host plant adaptation in lepidopteran herbivores.'] | ['gnd:1081269413', 'gnd:1192684982', 'gnd:36164-1', 'gnd:4052831-5', 'gnd:4159584-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845399888'] | ['Barthel, Andrea', 'Heckel, David G.', 'Friedrich-Schiller-Universität Jena', 'Schmetterlinge', 'Herbivoren'] | Document
### Title: ['Ecological immunology and host plant adaptation in lepidopteran herbivores']
### Abstract:
['Herbivorous insects live in complex environments in which they intimately interact with a broad range of pathogens. Therefore, herbivores require a range of efficient immune defense mechanisms that can cope with all potential pathogens as specifically and immediately as possible. Environments differ in the threats they pose: the risk of exposure to pathogens varies, as well as the pathogenesis of those microorganisms. Therefore, heterogeneous environments of herbivores will generate a complex natural selective pressure on their immune system, possibly causing variations in immune system functions among herbivorous insects. Variation in immune system functions will also impose different costs of defense upon herbivores, leading to complex patterns of trade-offs against other life-history traits, such as sexual traits. The complexity of environments, wherein herbivorous insects and pathogens interact, is also impacted by plants. The evolutionary arms race between plants and their herbivores provides plants with a highly sophisticated defense system. However, the relationship between plants and herbivores cannot be fully understood without incorporating the impact of herbivorous pathogens. We are only beginning to understand the complexity of herbivore - pathogen and herbivore - plant interactions that occur in complex environments. General explanations for both immune system variation and host plant adaptation in herbivorous insects are rare. Most immunological studies on herbivorous insects have almost exclusively focused on physiological and molecular mechanisms of the innate immune system, generally neglecting the fact that herbivores interact with their environment. The aim of this thesis was to examine the importance of insect ecology on immune system variation and host plant adaptation in lepidopteran herbivores.']
### GND ID:
['gnd:1081269413', 'gnd:1192684982', 'gnd:36164-1', 'gnd:4052831-5', 'gnd:4159584-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845399888']
### GND class:
['Barthel, Andrea', 'Heckel, David G.', 'Friedrich-Schiller-Universität Jena', 'Schmetterlinge', 'Herbivoren']
<|eot_id|> |
3A845603167.jsonld | ['Contemporary Indian writing in English between global fiction and transmodern historiography'] | ['Introduction -- Stories, histories, theories -- History between secularism and speculation: in times of siege -- Microcosms of modernity: Sea of poppies -- The personal as global: Shalimar the clown -- The future of the past: The last jet-engine laugh -- Historical imagination beyond memory and ideology: Solo -- Disclosing suppression, narrating neglect: The point of return -- Writing the unspeakable: Fireproof -- Deconstructing colonial epistemologies: The thing about thugs -- Urban Imaginaries of Past and Present: Maximum City -- Songs of faith and devotion: The afusic room -- Conclusion'] | ['gnd:109624781X', 'gnd:4014777-0', 'gnd:4026722-2', 'gnd:4035964-5', 'gnd:4156971-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845603167'] | ['Senft, Christoph', 'Englisch', 'Indien', 'Literatur', 'Geschichte (Motiv)'] | Document
### Title: ['Contemporary Indian writing in English between global fiction and transmodern historiography']
### Abstract:
['Introduction -- Stories, histories, theories -- History between secularism and speculation: in times of siege -- Microcosms of modernity: Sea of poppies -- The personal as global: Shalimar the clown -- The future of the past: The last jet-engine laugh -- Historical imagination beyond memory and ideology: Solo -- Disclosing suppression, narrating neglect: The point of return -- Writing the unspeakable: Fireproof -- Deconstructing colonial epistemologies: The thing about thugs -- Urban Imaginaries of Past and Present: Maximum City -- Songs of faith and devotion: The afusic room -- Conclusion']
### GND ID:
['gnd:109624781X', 'gnd:4014777-0', 'gnd:4026722-2', 'gnd:4035964-5', 'gnd:4156971-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845603167']
### GND class:
['Senft, Christoph', 'Englisch', 'Indien', 'Literatur', 'Geschichte (Motiv)']
<|eot_id|> |
3A845671294.jsonld | ['Tensor network methods for quantum lattice systems'] | ['Quantum lattice systems, tensor network states, nonabelian gauge theory. - Quantengittersysteme, Tensornetzwerkzustände, nicht-abelsche Eichtheorie'] | ['gnd:133638065', 'gnd:133890023', 'gnd:4171529-9', 'gnd:4184723-4', 'gnd:4226961-1', 'gnd:4300046-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845671294'] | ['Klempt, Carsten', 'Schuch, Norbert', 'Netzwerk', 'Tensor', 'Gittermodell', 'Quantenmechanisches System', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Tensor network methods for quantum lattice systems']
### Abstract:
['Quantum lattice systems, tensor network states, nonabelian gauge theory. - Quantengittersysteme, Tensornetzwerkzustände, nicht-abelsche Eichtheorie']
### GND ID:
['gnd:133638065', 'gnd:133890023', 'gnd:4171529-9', 'gnd:4184723-4', 'gnd:4226961-1', 'gnd:4300046-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845671294']
### GND class:
['Klempt, Carsten', 'Schuch, Norbert', 'Netzwerk', 'Tensor', 'Gittermodell', 'Quantenmechanisches System', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A845716174.jsonld | ['Semiclassical approximations in infinitely connected spaces'] | ['Zusammenfassung: The aim of this dissertation is to derive, from first principles, semiclassical approximations for quantum mechanical systems whose configuration space is infinitely connected. The emergence of such spaces is intimately related to magnetic forces which are classically inaccessible to the system under consideration, but which nevertheless influence the latter’s quantum mechanical behavior. While a comprehensible analysis of the corresponding exact quantum mechanical solutions is often obstructed by their complicated form, essential features of the dynamics collapse into discontinuities in Gutzwiller’s semiclassical propagator. The intention is thus to determine the origin of these discontinuities, in anticipation of an accessible semiclassical picture.The first system under consideration is a charged particle propagating in the presence of an Aharonov-Bohm magnetic flux line. The infinite connectedness of the problem arises as a consequence of the discontinuous dependence of Dirac’s magnetic phase factor on the number of windings of any closed curve encircling the flux. A novel semiclassical limit is introduced for the propagator of the otherwise free particle. While this limit directly produces the semiclassical approximation of Gutzwiller in backward propagation direction, in forward direction it describes two half-waves which acquire Dirac’s magnetic phase as if passing above and below the flux line, respectively. This splitting of the wave mediates a smooth transition of the propagator’s phase from negative to positive values, and gives rise to an interference pattern which is entirely determined by the contribution to Hamilton’s principal function associated with the angular motion of the particle with respect to the flux line. In a subsequent semiclassical limit, in which Planck’s constant is neglected against any nonzero such angular contribution, this smooth transition is no longer resolved and Gutzwiller’s expression is obtained also in forward propagationdirection, where its phase is discontinuous.In order to describe further potentials besides the flux, our thus-obtained approximation is amended accordingly and iterated as in a path-integral approach, followed by an evaluation by the method of stationary phase. To this end, the applicability of a method existing for this purpose for Cartesian problems is extended to accommodate, for the first time, also path-integral expressions parametrized by generalized coordin ...'] | ['gnd:1081103124', 'gnd:4296820-3', 'gnd:4300046-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845716174'] | ['Fischer, Stefan Georg', 'Quasiklassische Näherung', 'Quantenmechanisches System'] | Document
### Title: ['Semiclassical approximations in infinitely connected spaces']
### Abstract:
['Zusammenfassung: The aim of this dissertation is to derive, from first principles, semiclassical approximations for quantum mechanical systems whose configuration space is infinitely connected. The emergence of such spaces is intimately related to magnetic forces which are classically inaccessible to the system under consideration, but which nevertheless influence the latter’s quantum mechanical behavior. While a comprehensible analysis of the corresponding exact quantum mechanical solutions is often obstructed by their complicated form, essential features of the dynamics collapse into discontinuities in Gutzwiller’s semiclassical propagator. The intention is thus to determine the origin of these discontinuities, in anticipation of an accessible semiclassical picture.The first system under consideration is a charged particle propagating in the presence of an Aharonov-Bohm magnetic flux line. The infinite connectedness of the problem arises as a consequence of the discontinuous dependence of Dirac’s magnetic phase factor on the number of windings of any closed curve encircling the flux. A novel semiclassical limit is introduced for the propagator of the otherwise free particle. While this limit directly produces the semiclassical approximation of Gutzwiller in backward propagation direction, in forward direction it describes two half-waves which acquire Dirac’s magnetic phase as if passing above and below the flux line, respectively. This splitting of the wave mediates a smooth transition of the propagator’s phase from negative to positive values, and gives rise to an interference pattern which is entirely determined by the contribution to Hamilton’s principal function associated with the angular motion of the particle with respect to the flux line. In a subsequent semiclassical limit, in which Planck’s constant is neglected against any nonzero such angular contribution, this smooth transition is no longer resolved and Gutzwiller’s expression is obtained also in forward propagationdirection, where its phase is discontinuous.In order to describe further potentials besides the flux, our thus-obtained approximation is amended accordingly and iterated as in a path-integral approach, followed by an evaluation by the method of stationary phase. To this end, the applicability of a method existing for this purpose for Cartesian problems is extended to accommodate, for the first time, also path-integral expressions parametrized by generalized coordin ...']
### GND ID:
['gnd:1081103124', 'gnd:4296820-3', 'gnd:4300046-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A845716174']
### GND class:
['Fischer, Stefan Georg', 'Quasiklassische Näherung', 'Quantenmechanisches System']
<|eot_id|> |
3A846259044.jsonld | ['Charge carrier dynamics in InGaN quantum wells : stimulated emission depletion and lateral charge carrier motion'] | ['Zusammenfassung: Over the last decade Indium Gallium Nitride (InGaN) based LEDs have become one of the dominating light sources in cases where high efficiency and compact form factors are required. Despite having already reached a very high efficiency level, there is still room for further improvement. Charge carrier motion and recombination dynamics are essential processes when it comes to understanding and improving solid state based lighting technology on a fundamental level. Two experimental techniques based on confocal microscopy are used in the present work to study charge carrier dynamics and motion in InGaN based quantum well LED structures. It focuses on the investigation of stimulated emission depletion (STED) and lateral charge carrier motion, i.e. motion of charge carriers within the quantum well plane. In the first part the properties of the STED effect in blue InGaN quantum wells are studied using different continuous wave and pulsed laser sources. The samples are excited at 405 nm and depletion of the excited charge carriers is induced by stimulated emission using a second laser source with a wavelength in the long wavelength part of the fluorescence spectrum. It is found that only a partial fluorescence suppression of about 10% can be achieved in the investigated samples. This is not sufficient to use the STED effect for spatial resolution enhancement like it has already been successfully demonstrated for fluorescence dyes in studies of other authors. Two main processes are identified to be responsible for the partial fluorescence suppression. The first is the availability of only a limited number of localized states in the band structure being susceptible to depletion by stimulated emission. Their number is too small to allow for a sufficient depletion rate. The second effect is strong two photon absorption induced by the depletion laser. The enhanced non-linear absorption leads to an increase in fluorescence intensity and thus counteracts the depletion effect over a wide range of depletion laser powers. Extending the rate equation model normally used to describe STED by two photon absorption shows, that there might still be a chance to achieve higher fluorescence suppression outside of the experimentally accessible parameter space. A confocal time of flight method is used in the second part to measure for the first time the temperature and charge carrier density dependent in-plane diffusion constant of a turquoise InGaN multi quantum well ...'] | ['gnd:1081252294', 'gnd:4375592-6', 'gnd:4460230-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846259044'] | ['Solowan, Hans-Michael', 'Galliumnitrid', 'Indiumnitrid'] | Document
### Title: ['Charge carrier dynamics in InGaN quantum wells : stimulated emission depletion and lateral charge carrier motion']
### Abstract:
['Zusammenfassung: Over the last decade Indium Gallium Nitride (InGaN) based LEDs have become one of the dominating light sources in cases where high efficiency and compact form factors are required. Despite having already reached a very high efficiency level, there is still room for further improvement. Charge carrier motion and recombination dynamics are essential processes when it comes to understanding and improving solid state based lighting technology on a fundamental level. Two experimental techniques based on confocal microscopy are used in the present work to study charge carrier dynamics and motion in InGaN based quantum well LED structures. It focuses on the investigation of stimulated emission depletion (STED) and lateral charge carrier motion, i.e. motion of charge carriers within the quantum well plane. In the first part the properties of the STED effect in blue InGaN quantum wells are studied using different continuous wave and pulsed laser sources. The samples are excited at 405 nm and depletion of the excited charge carriers is induced by stimulated emission using a second laser source with a wavelength in the long wavelength part of the fluorescence spectrum. It is found that only a partial fluorescence suppression of about 10% can be achieved in the investigated samples. This is not sufficient to use the STED effect for spatial resolution enhancement like it has already been successfully demonstrated for fluorescence dyes in studies of other authors. Two main processes are identified to be responsible for the partial fluorescence suppression. The first is the availability of only a limited number of localized states in the band structure being susceptible to depletion by stimulated emission. Their number is too small to allow for a sufficient depletion rate. The second effect is strong two photon absorption induced by the depletion laser. The enhanced non-linear absorption leads to an increase in fluorescence intensity and thus counteracts the depletion effect over a wide range of depletion laser powers. Extending the rate equation model normally used to describe STED by two photon absorption shows, that there might still be a chance to achieve higher fluorescence suppression outside of the experimentally accessible parameter space. A confocal time of flight method is used in the second part to measure for the first time the temperature and charge carrier density dependent in-plane diffusion constant of a turquoise InGaN multi quantum well ...']
### GND ID:
['gnd:1081252294', 'gnd:4375592-6', 'gnd:4460230-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846259044']
### GND class:
['Solowan, Hans-Michael', 'Galliumnitrid', 'Indiumnitrid']
<|eot_id|> |
3A846259265.jsonld | ['Mesenchymal stromal cell therapy for dystrophic epidermolysis bullosa'] | [['Zusammenfassung: Dystrophic epidermolysis bullosa (DEB) is a rare heritable skin fragility disorder caused by mutations in the COL7A1 gene, coding for the anchoring fibril protein collagen VII. Under physiological conditions the unique function of collagen VII is the mediation of skin stability by attaching the epidermis to the underlying papillary dermis. Reduced amounts or the complete absence of collagen VII in patients with DEB result in severe cutaneous and extra-cutaneous disease manifestations including life-long mechanosensitivity of skin and mucosal surfaces, emergence of large body surface erosions, chronic wounds, secondary fibrosis and development of aggressive squamous cell carcinoma. The consequences of severe DEB massively impede the quality of life from the earliest years on and are hard to bear for the patient and the familiy. Despite tremendous efforts by the scientific community and pharmaceutical companies, no curative therapy is yet available for the treatment of DEB. This study describes the first long-term follow up of locally injected human mesenchymal stromal cells (MSCs) as a therapy option for DEB. Human bone marrow derived MSCs secreted stable triple helical collagen VII in vitro in a comparable amount to human fibroblasts and independent of individual donor age, gender or passage number. Repeated intradermal injections of MSCs in a DEB mouse model resulted in production and deposition of collagen VII at the dermal-epidermal junction, the physiological site of function. The effect was dose dependent with MSCs being up to ten-fold more potent than dermal fibroblasts. MSCs promoted regeneration of DEB wounds via normalization of dermal and epidermal healing and improved skin integrity through de novo formation of anchoring fibril-like structures. Additional benefits were gained by MSCs’ anti-inflammatory effects, which led to decreased immune cell infiltration into injured DEB skin. In this setting the clinical benefit of MSC injections lasted for more than three months.The data from this study suggest that locally applied MSCs are a viable option for DEB therapy, as they provide sufficient amounts of functional therapeutic collagen VII for the disease-challenged skin and relieve specific DEB symptoms', 'Zusammenfassung: Dystrophe epidermolysis bullosa (DEB) ist eine seltene erbliche Hauterkrankung, die durch Mutationen im COL7A1 Gen verursacht wird, welches für das Ankerfibrillenprotein Kollagen VII kodiert. Unter physiologischen Bedingungen vermittelt Kollagen VII Hautstabilität, indem es die oberste Hautschicht, die Epidermis, eng mit der darunterliegenden Schicht, der Dermis, verbindet. Verringerte Mengen oder die komplette Abwesenheit von Kollagen VII in Patienten mit DEB führen zu schweren systemischen Krankheitsausprägungen, die neben der Haut auch weitere Organe betreffen. Lebenslange Sensibilität gegenüber mechanischen Belastungen auf der Haut und Schleimhäuten, das Auftreten von großen Erosionen an Körperoberflächen, die Entstehung von chronischen Wunden und sekundärer Fibrose sowie die Entwicklung von aggressivem Hautkrebs sind charakteristische Merkmale der Erkrankung. Die Auswirkungen der Erkrankung beeinträchtigen Patienten in ihrer Lebensqualität von frühester Kindheit an und sind für die Patienten selbst und deren Angehörige nur schwer zu ertragen. Trotz enormer Anstrengungen seitens der klinischen Forschung und der pharmazeutischen Industrie gibt es gegenwärtig keine heilende Therapie für DEB Patienten.Diese Studie beschreibt zum ersten Mal einen Langzeitversuch von lokal injizierten mesenchymalen Stromazellen (MSCs) als Therapieoption für DEB. Humane MSCs aus dem Knochenmark sezernierten in vitro Kollagen VII mit stabilen helikalen Kollagendomänen in einem zu humanen Fibroblasten vergleichbarem Ausmaß, unabhängig vom Alter oder Geschlecht des einzelnen Spenders und unabhängig von der Passagezahl der MSCs. Wiederholte intradermale Injektionen von MSCs in einem DEB Mausmodell führten zu einer dosis-abhängigen Ablagerung von Kollagen VII an der physiologischen korrekten Stelle, der dermalen-epidermalen Verbindung, wobei MSCs, verglichen mit Fibroblasten, eine bis zu zehnmal höhere biologische Potenz aufwiesen. MSCs unterstützen die Regeneration von DEB Wunden durch die Normalisierung von epidermaler und dermaler Heilung sowie durch Verbesserung der Hautintegrität durch die Neubildung von Ankerfibrill-artigen Strukturen. Zusätzlicher Nutzen der MSCs resultierte von ihren anti-inflammatorischen Effekten, der zu einer reduzierten Infiltration von Immunzellen in die verwundete DEB Haut führte. In dieser Studie konnte ein therapeutischer Effekt der Behandlung für mindestens 3 Monate nach ...']] | ['gnd:1081264004', 'gnd:4164652-6', 'gnd:4278308-2', 'gnd:4540403-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846259265'] | ['Kühl, Tobias Hans-Jürgen', 'Kollagen', 'Mesenchymzelle', 'Epidermolysis bullosa dystrophicans'] | Document
### Title: ['Mesenchymal stromal cell therapy for dystrophic epidermolysis bullosa']
### Abstract:
[['Zusammenfassung: Dystrophic epidermolysis bullosa (DEB) is a rare heritable skin fragility disorder caused by mutations in the COL7A1 gene, coding for the anchoring fibril protein collagen VII. Under physiological conditions the unique function of collagen VII is the mediation of skin stability by attaching the epidermis to the underlying papillary dermis. Reduced amounts or the complete absence of collagen VII in patients with DEB result in severe cutaneous and extra-cutaneous disease manifestations including life-long mechanosensitivity of skin and mucosal surfaces, emergence of large body surface erosions, chronic wounds, secondary fibrosis and development of aggressive squamous cell carcinoma. The consequences of severe DEB massively impede the quality of life from the earliest years on and are hard to bear for the patient and the familiy. Despite tremendous efforts by the scientific community and pharmaceutical companies, no curative therapy is yet available for the treatment of DEB. This study describes the first long-term follow up of locally injected human mesenchymal stromal cells (MSCs) as a therapy option for DEB. Human bone marrow derived MSCs secreted stable triple helical collagen VII in vitro in a comparable amount to human fibroblasts and independent of individual donor age, gender or passage number. Repeated intradermal injections of MSCs in a DEB mouse model resulted in production and deposition of collagen VII at the dermal-epidermal junction, the physiological site of function. The effect was dose dependent with MSCs being up to ten-fold more potent than dermal fibroblasts. MSCs promoted regeneration of DEB wounds via normalization of dermal and epidermal healing and improved skin integrity through de novo formation of anchoring fibril-like structures. Additional benefits were gained by MSCs’ anti-inflammatory effects, which led to decreased immune cell infiltration into injured DEB skin. In this setting the clinical benefit of MSC injections lasted for more than three months.The data from this study suggest that locally applied MSCs are a viable option for DEB therapy, as they provide sufficient amounts of functional therapeutic collagen VII for the disease-challenged skin and relieve specific DEB symptoms', 'Zusammenfassung: Dystrophe epidermolysis bullosa (DEB) ist eine seltene erbliche Hauterkrankung, die durch Mutationen im COL7A1 Gen verursacht wird, welches für das Ankerfibrillenprotein Kollagen VII kodiert. Unter physiologischen Bedingungen vermittelt Kollagen VII Hautstabilität, indem es die oberste Hautschicht, die Epidermis, eng mit der darunterliegenden Schicht, der Dermis, verbindet. Verringerte Mengen oder die komplette Abwesenheit von Kollagen VII in Patienten mit DEB führen zu schweren systemischen Krankheitsausprägungen, die neben der Haut auch weitere Organe betreffen. Lebenslange Sensibilität gegenüber mechanischen Belastungen auf der Haut und Schleimhäuten, das Auftreten von großen Erosionen an Körperoberflächen, die Entstehung von chronischen Wunden und sekundärer Fibrose sowie die Entwicklung von aggressivem Hautkrebs sind charakteristische Merkmale der Erkrankung. Die Auswirkungen der Erkrankung beeinträchtigen Patienten in ihrer Lebensqualität von frühester Kindheit an und sind für die Patienten selbst und deren Angehörige nur schwer zu ertragen. Trotz enormer Anstrengungen seitens der klinischen Forschung und der pharmazeutischen Industrie gibt es gegenwärtig keine heilende Therapie für DEB Patienten.Diese Studie beschreibt zum ersten Mal einen Langzeitversuch von lokal injizierten mesenchymalen Stromazellen (MSCs) als Therapieoption für DEB. Humane MSCs aus dem Knochenmark sezernierten in vitro Kollagen VII mit stabilen helikalen Kollagendomänen in einem zu humanen Fibroblasten vergleichbarem Ausmaß, unabhängig vom Alter oder Geschlecht des einzelnen Spenders und unabhängig von der Passagezahl der MSCs. Wiederholte intradermale Injektionen von MSCs in einem DEB Mausmodell führten zu einer dosis-abhängigen Ablagerung von Kollagen VII an der physiologischen korrekten Stelle, der dermalen-epidermalen Verbindung, wobei MSCs, verglichen mit Fibroblasten, eine bis zu zehnmal höhere biologische Potenz aufwiesen. MSCs unterstützen die Regeneration von DEB Wunden durch die Normalisierung von epidermaler und dermaler Heilung sowie durch Verbesserung der Hautintegrität durch die Neubildung von Ankerfibrill-artigen Strukturen. Zusätzlicher Nutzen der MSCs resultierte von ihren anti-inflammatorischen Effekten, der zu einer reduzierten Infiltration von Immunzellen in die verwundete DEB Haut führte. In dieser Studie konnte ein therapeutischer Effekt der Behandlung für mindestens 3 Monate nach ...']]
### GND ID:
['gnd:1081264004', 'gnd:4164652-6', 'gnd:4278308-2', 'gnd:4540403-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846259265']
### GND class:
['Kühl, Tobias Hans-Jürgen', 'Kollagen', 'Mesenchymzelle', 'Epidermolysis bullosa dystrophicans']
<|eot_id|> |
3A846461390.jsonld | ['The underrepresentation of male youth with a migration background in higher education in Germany : "Voices of Society" vs. "Voices of Youth"'] | ['Why are male youth with a migration background underrepresented in higher education in Germany? The answer is not simple and there are certain limitations when developing possible solutions for this problem. This book tries to provide an answer to this question by interviewing male migrant youth and focusing on the already practiced strategies, beliefs and tendencies of those youth who have been successful. The premise is that actual proof is more useful than theoretical proof, is easier to apply and might provide inspiration for other youth. In a way this book is a comparison of qualitative and quantitative research. <engl.>'] | ['gnd:122279956', 'gnd:122987055', 'gnd:4006650-2', 'gnd:4011882-4', 'gnd:4013943-8', 'gnd:4160198-1', 'gnd:4191103-9', 'gnd:4290802-4', 'gnd:7544915-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846461390'] | ['Melter, Claus', 'Leiprecht, Rudolf', 'Bildung', 'Deutschland', 'Einstellung', 'Hochschulbildung', 'Zugang', 'Männliche Jugend', 'Migrationshintergrund'] | Document
### Title: ['The underrepresentation of male youth with a migration background in higher education in Germany : "Voices of Society" vs. "Voices of Youth"']
### Abstract:
['Why are male youth with a migration background underrepresented in higher education in Germany? The answer is not simple and there are certain limitations when developing possible solutions for this problem. This book tries to provide an answer to this question by interviewing male migrant youth and focusing on the already practiced strategies, beliefs and tendencies of those youth who have been successful. The premise is that actual proof is more useful than theoretical proof, is easier to apply and might provide inspiration for other youth. In a way this book is a comparison of qualitative and quantitative research. <engl.>']
### GND ID:
['gnd:122279956', 'gnd:122987055', 'gnd:4006650-2', 'gnd:4011882-4', 'gnd:4013943-8', 'gnd:4160198-1', 'gnd:4191103-9', 'gnd:4290802-4', 'gnd:7544915-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846461390']
### GND class:
['Melter, Claus', 'Leiprecht, Rudolf', 'Bildung', 'Deutschland', 'Einstellung', 'Hochschulbildung', 'Zugang', 'Männliche Jugend', 'Migrationshintergrund']
<|eot_id|> |
3A846462370.jsonld | ['Constructing quantum spacetime : relation to classical gravity'] | ["Despite remarkable progress made in the past century, which has revolutionized our understanding of the universe, there are numerous open questions left in theoretical physics. Particularly important is the fact that the theories describing the fundamental interactions of nature are incompatible. Einstein's theory of general relative describes gravity as a dynamical spacetime, which is curved by matter and whose curvature determines the motion of matter. On the other hand we have quantum field theory, in form of the standard model of particle physics, where particles interact via the remaining interactions - electromagnetic, weak and strong interaction - on a flat, static spacetime without gravity. A theory of quantum gravity is hoped to cure this incompatibility by heuristically replacing classical spacetime by quantum spacetime'. Several approaches exist attempting to define such a theory with differing underlying premises and ideas, where it is not clear which is to be preferred. Yet a minimal requirement is the compatibility with the classical theory, they attempt to generalize. Interestingly many of these models rely on discrete structures in their definition or postulate discreteness of spacetime to be fundamental. Besides the direct advantages discretisations provide, e.g. permitting numerical simulations, they come with serious caveats requiring thorough investigation: In general discretisations break fundamental diffeomorphism symmetry of gravity and are generically not unique. Both complicates establishing the connection to the classical continuum theory. The main focus of this thesis lies in the investigation of this relation for spin foam models. This is done on different levels of the discretisation / triangulation, ranging from few simplices up to the continuum limit. In the regime of very few simplices we confirm and deepen the connection of spin foam models to discrete gravity. Moreover, we discuss dynamical, e.g. diffeomorphism invariance in the discrete, to fix the ambiguities of the models. In order to satisfy these conditions, the discrete models have to be improved in a renormalisation procedure, which also allows us to study their continuum dynamics. Applied to simplified spin foam models, we uncover a rich, non--trivial fixed point structure, which we summarize in a phase diagram. Inspired by these methods, we propose a method to consistently construct the continuum theory, which comes with a unique vacuum state"] | ['gnd:1081656913', 'gnd:1103240579', 'gnd:2120681-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846462370'] | ['Steinhaus, Sebastian', 'Schleifenquantengravitation', 'Universität Potsdam'] | Document
### Title: ['Constructing quantum spacetime : relation to classical gravity']
### Abstract:
["Despite remarkable progress made in the past century, which has revolutionized our understanding of the universe, there are numerous open questions left in theoretical physics. Particularly important is the fact that the theories describing the fundamental interactions of nature are incompatible. Einstein's theory of general relative describes gravity as a dynamical spacetime, which is curved by matter and whose curvature determines the motion of matter. On the other hand we have quantum field theory, in form of the standard model of particle physics, where particles interact via the remaining interactions - electromagnetic, weak and strong interaction - on a flat, static spacetime without gravity. A theory of quantum gravity is hoped to cure this incompatibility by heuristically replacing classical spacetime by quantum spacetime'. Several approaches exist attempting to define such a theory with differing underlying premises and ideas, where it is not clear which is to be preferred. Yet a minimal requirement is the compatibility with the classical theory, they attempt to generalize. Interestingly many of these models rely on discrete structures in their definition or postulate discreteness of spacetime to be fundamental. Besides the direct advantages discretisations provide, e.g. permitting numerical simulations, they come with serious caveats requiring thorough investigation: In general discretisations break fundamental diffeomorphism symmetry of gravity and are generically not unique. Both complicates establishing the connection to the classical continuum theory. The main focus of this thesis lies in the investigation of this relation for spin foam models. This is done on different levels of the discretisation / triangulation, ranging from few simplices up to the continuum limit. In the regime of very few simplices we confirm and deepen the connection of spin foam models to discrete gravity. Moreover, we discuss dynamical, e.g. diffeomorphism invariance in the discrete, to fix the ambiguities of the models. In order to satisfy these conditions, the discrete models have to be improved in a renormalisation procedure, which also allows us to study their continuum dynamics. Applied to simplified spin foam models, we uncover a rich, non--trivial fixed point structure, which we summarize in a phase diagram. Inspired by these methods, we propose a method to consistently construct the continuum theory, which comes with a unique vacuum state"]
### GND ID:
['gnd:1081656913', 'gnd:1103240579', 'gnd:2120681-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846462370']
### GND class:
['Steinhaus, Sebastian', 'Schleifenquantengravitation', 'Universität Potsdam']
<|eot_id|> |
3A846466368.jsonld | ['Constructing quantum spacetime: Relation to classical gravity'] | ["Despite remarkable progress made in the past century, which has revolutionized our understanding of the universe, there are numerous open questions left in theoretical physics. Particularly important is the fact that the theories describing the fundamental interactions of nature are incompatible. Einstein's theory of general relative describes gravity as a dynamical spacetime, which is curved by matter and whose curvature determines the motion of matter. On the other hand we have quantum field theory, in form of the standard model of particle physics, where particles interact via the remaining interactions - electromagnetic, weak and strong interaction - on a flat, static spacetime without gravity. A theory of quantum gravity is hoped to cure this incompatibility by heuristically replacing classical spacetime by quantum spacetime'. Several approaches exist attempting to define such a theory with differing underlying premises and ideas, where it is not clear which is to be preferred. Yet a minimal requirement is the compatibility with the classical theory, they attempt to generalize. Interestingly many of these models rely on discrete structures in their definition or postulate discreteness of spacetime to be fundamental. Besides the direct advantages discretisations provide, e.g. permitting numerical simulations, they come with serious caveats requiring thorough investigation: In general discretisations break fundamental diffeomorphism symmetry of gravity and are generically not unique. Both complicates establishing the connection to the classical continuum theory. The main focus of this thesis lies in the investigation of this relation for spin foam models. This is done on different levels of the discretisation / triangulation, ranging from few simplices up to the continuum limit. In the regime of very few simplices we confirm and deepen the connection of spin foam models to discrete gravity. Moreover, we discuss dynamical, e.g. diffeomorphism invariance in the discrete, to fix the ambiguities of the models. In order to satisfy these conditions, the discrete models have to be improved in a renormalisation procedure, which also allows us to study their continuum dynamics. Applied to simplified spin foam models, we uncover a rich, non--trivial fixed point structure, which we summarize in a phase diagram. Inspired by these methods, we propose a method to consistently construct the continuum theory, which comes with a unique vacuum state"] | ['gnd:1081656913', 'gnd:1103240579', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846466368'] | ['Steinhaus, Sebastian', 'Schleifenquantengravitation'] | Document
### Title: ['Constructing quantum spacetime: Relation to classical gravity']
### Abstract:
["Despite remarkable progress made in the past century, which has revolutionized our understanding of the universe, there are numerous open questions left in theoretical physics. Particularly important is the fact that the theories describing the fundamental interactions of nature are incompatible. Einstein's theory of general relative describes gravity as a dynamical spacetime, which is curved by matter and whose curvature determines the motion of matter. On the other hand we have quantum field theory, in form of the standard model of particle physics, where particles interact via the remaining interactions - electromagnetic, weak and strong interaction - on a flat, static spacetime without gravity. A theory of quantum gravity is hoped to cure this incompatibility by heuristically replacing classical spacetime by quantum spacetime'. Several approaches exist attempting to define such a theory with differing underlying premises and ideas, where it is not clear which is to be preferred. Yet a minimal requirement is the compatibility with the classical theory, they attempt to generalize. Interestingly many of these models rely on discrete structures in their definition or postulate discreteness of spacetime to be fundamental. Besides the direct advantages discretisations provide, e.g. permitting numerical simulations, they come with serious caveats requiring thorough investigation: In general discretisations break fundamental diffeomorphism symmetry of gravity and are generically not unique. Both complicates establishing the connection to the classical continuum theory. The main focus of this thesis lies in the investigation of this relation for spin foam models. This is done on different levels of the discretisation / triangulation, ranging from few simplices up to the continuum limit. In the regime of very few simplices we confirm and deepen the connection of spin foam models to discrete gravity. Moreover, we discuss dynamical, e.g. diffeomorphism invariance in the discrete, to fix the ambiguities of the models. In order to satisfy these conditions, the discrete models have to be improved in a renormalisation procedure, which also allows us to study their continuum dynamics. Applied to simplified spin foam models, we uncover a rich, non--trivial fixed point structure, which we summarize in a phase diagram. Inspired by these methods, we propose a method to consistently construct the continuum theory, which comes with a unique vacuum state"]
### GND ID:
['gnd:1081656913', 'gnd:1103240579', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846466368']
### GND class:
['Steinhaus, Sebastian', 'Schleifenquantengravitation']
<|eot_id|> |
3A846622882.jsonld | ['DiverCity - global cities as a literary phenomenon : Toronto, New York, and Los Angeles in a globalizing age'] | ["Based on the structured analysis of selected North American novels, this work examines global cities as a literary phenomenon ('DiverCity'). By analyzing Dionne Brand's Toronto, 'What We All Long For' (2005), Chang-rae Lee's New York, 'Native Speaker' (1995), and Karen Tei Yamashita's Los Angeles, 'Tropic of Orange' (1997), Melanie U. Pooch provides the connecting link for exploring the triad of globalization and its effects, global cities as cultural nodal points, and cultural diversity in a globalizing age as a literary phenomenon. Thus, she contributes to a global, interdisciplinary, and multi-perspectival understanding of literature, culture, and society."] | ['gnd:1081994509', 'gnd:1096192268', 'gnd:1096193736', 'gnd:1096194929', 'gnd:123291518', 'gnd:130039837', 'gnd:132125773', 'gnd:4126697-3', 'gnd:4725236-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846622882'] | ['Pooch, Melanie U.', 'What we all long for', 'Native speaker', 'Tropic of orange', 'Lee, Chang-rae 1965', 'Yamashita, Karen Tei 1951', 'Brand, Dionne 1953', 'Stadt (Motiv)', 'Globalisierung (Motiv)'] | Document
### Title: ['DiverCity - global cities as a literary phenomenon : Toronto, New York, and Los Angeles in a globalizing age']
### Abstract:
["Based on the structured analysis of selected North American novels, this work examines global cities as a literary phenomenon ('DiverCity'). By analyzing Dionne Brand's Toronto, 'What We All Long For' (2005), Chang-rae Lee's New York, 'Native Speaker' (1995), and Karen Tei Yamashita's Los Angeles, 'Tropic of Orange' (1997), Melanie U. Pooch provides the connecting link for exploring the triad of globalization and its effects, global cities as cultural nodal points, and cultural diversity in a globalizing age as a literary phenomenon. Thus, she contributes to a global, interdisciplinary, and multi-perspectival understanding of literature, culture, and society."]
### GND ID:
['gnd:1081994509', 'gnd:1096192268', 'gnd:1096193736', 'gnd:1096194929', 'gnd:123291518', 'gnd:130039837', 'gnd:132125773', 'gnd:4126697-3', 'gnd:4725236-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846622882']
### GND class:
['Pooch, Melanie U.', 'What we all long for', 'Native speaker', 'Tropic of orange', 'Lee, Chang-rae 1965', 'Yamashita, Karen Tei 1951', 'Brand, Dionne 1953', 'Stadt (Motiv)', 'Globalisierung (Motiv)']
<|eot_id|> |
3A846742373.jsonld | ['Stability of the large low shear velocity provinces : numerical modeling of thermochemical mantle convection'] | ['We study segregation of the subducted oceanic crust (OC) at the core mantle boundary and its ability to accumulate and form large thermochemical piles (such as the seismically observed Large Low Shear Velocity Provinces - LLSVPs). Our high-resolution numerical simulations suggest that the longevity of LLSVPs for up to three billion years, and possibly longer, can be ensured by a balance in the rate of segregation of high-density OC-material to the CMB, and the rate of its entrainment away from the CMB by mantle upwellings. For a range of parameters tested in this study, a large-scale compositional anomaly forms at the CMB, similar in shape and size to the LLSVPs. Neutrally buoyant thermochemical piles formed by mechanical stirring - where thermally induced negative density anomaly is balanced by the presence of a fraction of dense anomalous material - best resemble the geometry of LLSVPs. Such neutrally buoyant piles tend to emerge and survive for at least 3Gyr in simulations with quite different parameters. We conclude that for a plausible range of values of density anomaly of OC material in the lower mantle - it is likely that it segregates to the CMB, gets mechanically mixed with the ambient material, and forms neutrally buoyant large scale compositional anomalies similar in shape to the LLSVPs. We have developed an efficient FEM code with dynamically adaptive time and space resolution, and marker-in-cell methodology. This enabled us to model thermochemical mantle convection at realistically high convective vigor, strong thermally induced viscosity variations, and long term evolution of compositional fields.'] | ['gnd:1049859308', 'gnd:1081746432', 'gnd:2120681-8', 'gnd:4078260-8', 'gnd:4338132-7', 'gnd:4354719-9', 'gnd:4401792-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846742373'] | ['Weber, Michael', 'Mulyukova, Elvira', 'Universität Potsdam', 'Thermochemie', 'Numerisches Modell', 'Konvektionsstrom (Geologie)', 'Unterer Erdmantel'] | Document
### Title: ['Stability of the large low shear velocity provinces : numerical modeling of thermochemical mantle convection']
### Abstract:
['We study segregation of the subducted oceanic crust (OC) at the core mantle boundary and its ability to accumulate and form large thermochemical piles (such as the seismically observed Large Low Shear Velocity Provinces - LLSVPs). Our high-resolution numerical simulations suggest that the longevity of LLSVPs for up to three billion years, and possibly longer, can be ensured by a balance in the rate of segregation of high-density OC-material to the CMB, and the rate of its entrainment away from the CMB by mantle upwellings. For a range of parameters tested in this study, a large-scale compositional anomaly forms at the CMB, similar in shape and size to the LLSVPs. Neutrally buoyant thermochemical piles formed by mechanical stirring - where thermally induced negative density anomaly is balanced by the presence of a fraction of dense anomalous material - best resemble the geometry of LLSVPs. Such neutrally buoyant piles tend to emerge and survive for at least 3Gyr in simulations with quite different parameters. We conclude that for a plausible range of values of density anomaly of OC material in the lower mantle - it is likely that it segregates to the CMB, gets mechanically mixed with the ambient material, and forms neutrally buoyant large scale compositional anomalies similar in shape to the LLSVPs. We have developed an efficient FEM code with dynamically adaptive time and space resolution, and marker-in-cell methodology. This enabled us to model thermochemical mantle convection at realistically high convective vigor, strong thermally induced viscosity variations, and long term evolution of compositional fields.']
### GND ID:
['gnd:1049859308', 'gnd:1081746432', 'gnd:2120681-8', 'gnd:4078260-8', 'gnd:4338132-7', 'gnd:4354719-9', 'gnd:4401792-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846742373']
### GND class:
['Weber, Michael', 'Mulyukova, Elvira', 'Universität Potsdam', 'Thermochemie', 'Numerisches Modell', 'Konvektionsstrom (Geologie)', 'Unterer Erdmantel']
<|eot_id|> |
3A846747383.jsonld | ['Zur Topographie und Morphologie der Harder-Drüse von Tupaia belangeri unter Berücksichtigung des Geschlechtsdimorphismus : eine quantitative Studie auf der Grundlage von MRT-Untersuchungen'] | [['In the present study the topography of the Harderian gland was examined regarding to a sexual dimorphism based on 20 adult heads of Tupaia belangeri. Therefore from all Tupaia heads MRI scans were made in a 7 Tesla ClinScan tomograph. By using the software WinSurf® 4.0 the volumes of the Harderian glands and bulbi oculi could be calculated and 3D reconstructions could be made. In addition, various orbital and skull measurements were determined. By using correlation analyzes potential relationships between the different sizes and the size of the Harderian gland and the bulbus oculi were examined. The Harderian gland of Tupaia belangeri is located medial and posterior of the eyeball and is embedded in the retrobulbar tissue of the orbit. In addition, it is surrounded by fatty tissue or an orbital sinus venosus. The convex side of the Harderian gland is located on the medial orbital wall and the concave side covers the bulbus oculi. The Harderian glands of male Tupaia belangeri are twice as large as that of females. The Harderian gland of male animals extends behind the eyeball until the optic nerve. In the females there is no relationship to the optic nerve shown. The rectus ventralis muscle, one of the extraocular muscles, leaves at the bottom of the Harderian gland of Tupaia belangeri an Impression. In females, this impression is less pronounced. Underneath the rectus ventralis muscle the Harderian gland takes almost complete the posterior part of the orbit. Here it has its ...', 'Harder-Drüse, Nickhautdrüse, Tupaia belangeri, Dimorphismus, Geschlechtsunterschied, Kernspintomografie, harderian gland, sexual dimorphism, Tupaia belangeri']] | ['gnd:36158-6', 'gnd:4071781-1', 'gnd:4120806-7', 'gnd:4171830-6', 'gnd:4193011-3', 'gnd:4210815-9', 'gnd:4285901-3', 'gnd:4321556-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846747383'] | ['Ernst-Moritz-Arndt-Universität Greifswald', 'Geschlechtsunterschied', 'Kernspintomografie', 'Nickhautdrüse', 'Augenhöhle', 'Dimorphismus', 'Harder-Drüse', 'Tupaia belangeri'] | Document
### Title: ['Zur Topographie und Morphologie der Harder-Drüse von Tupaia belangeri unter Berücksichtigung des Geschlechtsdimorphismus : eine quantitative Studie auf der Grundlage von MRT-Untersuchungen']
### Abstract:
[['In the present study the topography of the Harderian gland was examined regarding to a sexual dimorphism based on 20 adult heads of Tupaia belangeri. Therefore from all Tupaia heads MRI scans were made in a 7 Tesla ClinScan tomograph. By using the software WinSurf® 4.0 the volumes of the Harderian glands and bulbi oculi could be calculated and 3D reconstructions could be made. In addition, various orbital and skull measurements were determined. By using correlation analyzes potential relationships between the different sizes and the size of the Harderian gland and the bulbus oculi were examined. The Harderian gland of Tupaia belangeri is located medial and posterior of the eyeball and is embedded in the retrobulbar tissue of the orbit. In addition, it is surrounded by fatty tissue or an orbital sinus venosus. The convex side of the Harderian gland is located on the medial orbital wall and the concave side covers the bulbus oculi. The Harderian glands of male Tupaia belangeri are twice as large as that of females. The Harderian gland of male animals extends behind the eyeball until the optic nerve. In the females there is no relationship to the optic nerve shown. The rectus ventralis muscle, one of the extraocular muscles, leaves at the bottom of the Harderian gland of Tupaia belangeri an Impression. In females, this impression is less pronounced. Underneath the rectus ventralis muscle the Harderian gland takes almost complete the posterior part of the orbit. Here it has its ...', 'Harder-Drüse, Nickhautdrüse, Tupaia belangeri, Dimorphismus, Geschlechtsunterschied, Kernspintomografie, harderian gland, sexual dimorphism, Tupaia belangeri']]
### GND ID:
['gnd:36158-6', 'gnd:4071781-1', 'gnd:4120806-7', 'gnd:4171830-6', 'gnd:4193011-3', 'gnd:4210815-9', 'gnd:4285901-3', 'gnd:4321556-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846747383']
### GND class:
['Ernst-Moritz-Arndt-Universität Greifswald', 'Geschlechtsunterschied', 'Kernspintomografie', 'Nickhautdrüse', 'Augenhöhle', 'Dimorphismus', 'Harder-Drüse', 'Tupaia belangeri']
<|eot_id|> |
3A846805081.jsonld | ['From Spitzer mid-infrared observations and measurements of peculiar velocities to constrained simulations of the local universe'] | ["Galaxies are observational probes to study the Large Scale Structure. Their gravitational motions are tracers of the total matter density and therefore of the Large Scale Structure. Besides, studies of structure formation and galaxy evolution rely on numerical cosmological simulations. Still, only one universe observable from a given position, in time and space, is available for comparisons with simulations. The related cosmic variance affects our ability to interpret the results. Simulations constrained by observational data are a perfect remedy to this problem. Achieving such simulations requires the projects Cosmic flows and CLUES. Cosmic flows builds catalogs of accurate distance measurements to map deviations from the expansion. These measures are mainly obtained with the galaxy luminosity-rotation rate correlation. We present the calibration of that relation in the mid-infrared with observational data from Spitzer Space Telescope. Resulting accurate distance estimates will be included in the third catalog of the project. In the meantime, two catalogs up to 30 and 150 Mpc/h have been released. We report improvements and applications of the CLUES' method on these two catalogs. The technique is based on the constrained realization algorithm. The cosmic displacement field is computed with the Zel'dovich approximation. This latter is then reversed to relocate reconstructed three-dimensional constraints to their precursors' positions in the initial field. The size of the second catalog (8000 galaxies within 150 Mpc/h) highlighted the importance of minimizing the observational biases. By carrying out tests on mock catalogs, built from cosmological simulations, a method to minimize observational bias can be derived. Finally, for the first time, cosmological simulations are constrained solely by peculiar velocities. The process is successful as resulting simulations resemble the Local Universe. The major attractors and voids are simulated at positions approaching observational positions by a few megaparsecs, thus reaching the limit imposed by the linear theory."] | ['gnd:1014451787', 'gnd:1082252611', 'gnd:2120681-8', 'gnd:4057375-8', 'gnd:4337335-5', 'gnd:7546607-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846805081'] | ['Steinmetz, Matthias', 'Sorce, Jenny', 'Universität Potsdam', 'Galaxie', 'MIR (Physik)', 'Spitzer Space Telescope'] | Document
### Title: ['From Spitzer mid-infrared observations and measurements of peculiar velocities to constrained simulations of the local universe']
### Abstract:
["Galaxies are observational probes to study the Large Scale Structure. Their gravitational motions are tracers of the total matter density and therefore of the Large Scale Structure. Besides, studies of structure formation and galaxy evolution rely on numerical cosmological simulations. Still, only one universe observable from a given position, in time and space, is available for comparisons with simulations. The related cosmic variance affects our ability to interpret the results. Simulations constrained by observational data are a perfect remedy to this problem. Achieving such simulations requires the projects Cosmic flows and CLUES. Cosmic flows builds catalogs of accurate distance measurements to map deviations from the expansion. These measures are mainly obtained with the galaxy luminosity-rotation rate correlation. We present the calibration of that relation in the mid-infrared with observational data from Spitzer Space Telescope. Resulting accurate distance estimates will be included in the third catalog of the project. In the meantime, two catalogs up to 30 and 150 Mpc/h have been released. We report improvements and applications of the CLUES' method on these two catalogs. The technique is based on the constrained realization algorithm. The cosmic displacement field is computed with the Zel'dovich approximation. This latter is then reversed to relocate reconstructed three-dimensional constraints to their precursors' positions in the initial field. The size of the second catalog (8000 galaxies within 150 Mpc/h) highlighted the importance of minimizing the observational biases. By carrying out tests on mock catalogs, built from cosmological simulations, a method to minimize observational bias can be derived. Finally, for the first time, cosmological simulations are constrained solely by peculiar velocities. The process is successful as resulting simulations resemble the Local Universe. The major attractors and voids are simulated at positions approaching observational positions by a few megaparsecs, thus reaching the limit imposed by the linear theory."]
### GND ID:
['gnd:1014451787', 'gnd:1082252611', 'gnd:2120681-8', 'gnd:4057375-8', 'gnd:4337335-5', 'gnd:7546607-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846805081']
### GND class:
['Steinmetz, Matthias', 'Sorce, Jenny', 'Universität Potsdam', 'Galaxie', 'MIR (Physik)', 'Spitzer Space Telescope']
<|eot_id|> |
3A84685810X.jsonld | ['Formation and alteration of magnetite nanoparticles'] | ['Magnetite is an iron oxide, which is ubiquitous in rocks and is usually deposited as small nanoparticulate matter among other rock material. It differs from most other iron oxides because it contains divalent and trivalent iron. Consequently, it has a special crystal structure and unique magnetic properties. These properties are used for paleoclimatic reconstructions where naturally occurring magnetite helps understanding former geological ages. Further on, magnetic properties are used in bio- and nanotechnological applications –synthetic magnetite serves as a contrast agent in MRI, is exploited in biosensing, hyperthermia or is used in storage media. Magnetic properties are strongly size-dependent and achieving size control under preferably mild synthesis conditions is of interest in order to obtain particles with required properties. By using a custom-made setup, it was possible to synthesize stable single domain magnetite nanoparticles with the co-precipitation method. Furthermore, it was shown that magnetite formation is temperature-dependent, resulting in larger particles at higher temperatures. However, mechanistic approaches about the details are incomplete. Formation of magnetite from solution was shown to occur from nanoparticulate matter rather than solvated ions. The theoretical framework of such processes has only started to be described, partly due to the lack of kinetic or thermodynamic data. Synthesis of magnetite nanoparticles at different temperatures was performed and the Arrhenius plot was used determine an activation energy for crystal growth of 28.4 kJ mol-1, which led to the conclusion that nanoparticle diffusion is the rate-determining step. Furthermore, a study of the alteration of magnetite particles of different sizes as a function of their storage conditions is presented. The magnetic properties depend not only on particle size but also depend on the structure of the oxide, because magnetite oxidizes to maghemite under environmental conditions. The dynamics of this process have not been well described. Smaller nanoparticles are shown to oxidize more rapidly than larger ones and the lower the storage temperature, the lower the measured oxidation. In addition, the magnetic properties of the altered particles are not decreased dramatically, thus suggesting that this alteration will not impact the use of such nanoparticles as medical carriers. Finally, the effect of biological additives on magnetite formation was investigated. Magnetotactic bacteria¬¬ are able to synthesize and align magnetite nanoparticles of well-defined size and morphology due to the involvement of special proteins with specific binding properties. Based on this model of morphology control, phage display experiments were performed to determine peptide sequences that preferably bind to (111)-magnetite faces. The aim was to control the shape of magnetite nanoparticles during the formation. Magnetotactic bacteria are also able to control the intracellular redox potential with proteins called magnetochromes. MamP is such a protein and its oxidizing nature was studied in vitro via biomimetic magnetite formation experiments based on ferrous ions. Magnetite and further trivalent oxides were found. This work helps understanding basic mechanisms of magnetite formation and gives insight into non-classical crystal growth. In addition, it is shown that alteration of magnetite nanoparticles is mainly based on oxidation to maghemite and does not significantly influence the magnetic properties. Finally, biomimetic experiments help understanding the role of MamP within the bacteria and furthermore, a first step was performed to achieve morphology control in magnetite formation via co-precipitation'] | ['gnd:1081922966', 'gnd:2120681-8', 'gnd:4114488-0', 'gnd:4333369-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84685810X'] | ['Widdrat, Marc', 'Universität Potsdam', 'Magnetit', 'Nanopartikel'] | Document
### Title: ['Formation and alteration of magnetite nanoparticles']
### Abstract:
['Magnetite is an iron oxide, which is ubiquitous in rocks and is usually deposited as small nanoparticulate matter among other rock material. It differs from most other iron oxides because it contains divalent and trivalent iron. Consequently, it has a special crystal structure and unique magnetic properties. These properties are used for paleoclimatic reconstructions where naturally occurring magnetite helps understanding former geological ages. Further on, magnetic properties are used in bio- and nanotechnological applications –synthetic magnetite serves as a contrast agent in MRI, is exploited in biosensing, hyperthermia or is used in storage media. Magnetic properties are strongly size-dependent and achieving size control under preferably mild synthesis conditions is of interest in order to obtain particles with required properties. By using a custom-made setup, it was possible to synthesize stable single domain magnetite nanoparticles with the co-precipitation method. Furthermore, it was shown that magnetite formation is temperature-dependent, resulting in larger particles at higher temperatures. However, mechanistic approaches about the details are incomplete. Formation of magnetite from solution was shown to occur from nanoparticulate matter rather than solvated ions. The theoretical framework of such processes has only started to be described, partly due to the lack of kinetic or thermodynamic data. Synthesis of magnetite nanoparticles at different temperatures was performed and the Arrhenius plot was used determine an activation energy for crystal growth of 28.4 kJ mol-1, which led to the conclusion that nanoparticle diffusion is the rate-determining step. Furthermore, a study of the alteration of magnetite particles of different sizes as a function of their storage conditions is presented. The magnetic properties depend not only on particle size but also depend on the structure of the oxide, because magnetite oxidizes to maghemite under environmental conditions. The dynamics of this process have not been well described. Smaller nanoparticles are shown to oxidize more rapidly than larger ones and the lower the storage temperature, the lower the measured oxidation. In addition, the magnetic properties of the altered particles are not decreased dramatically, thus suggesting that this alteration will not impact the use of such nanoparticles as medical carriers. Finally, the effect of biological additives on magnetite formation was investigated. Magnetotactic bacteria¬¬ are able to synthesize and align magnetite nanoparticles of well-defined size and morphology due to the involvement of special proteins with specific binding properties. Based on this model of morphology control, phage display experiments were performed to determine peptide sequences that preferably bind to (111)-magnetite faces. The aim was to control the shape of magnetite nanoparticles during the formation. Magnetotactic bacteria are also able to control the intracellular redox potential with proteins called magnetochromes. MamP is such a protein and its oxidizing nature was studied in vitro via biomimetic magnetite formation experiments based on ferrous ions. Magnetite and further trivalent oxides were found. This work helps understanding basic mechanisms of magnetite formation and gives insight into non-classical crystal growth. In addition, it is shown that alteration of magnetite nanoparticles is mainly based on oxidation to maghemite and does not significantly influence the magnetic properties. Finally, biomimetic experiments help understanding the role of MamP within the bacteria and furthermore, a first step was performed to achieve morphology control in magnetite formation via co-precipitation']
### GND ID:
['gnd:1081922966', 'gnd:2120681-8', 'gnd:4114488-0', 'gnd:4333369-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84685810X']
### GND class:
['Widdrat, Marc', 'Universität Potsdam', 'Magnetit', 'Nanopartikel']
<|eot_id|> |
3A846985586.jsonld | ['Strukturbildung in fermentierten Milchprodukten durch Laccasen aus Basidiomyceten'] | ['Cross-linking, Laccase, Mediator, viskoelastische Eigenschaften, Rheologie, Magermilchjoghurt, Basidiomycota, Pleurotus eryngii, Viskosität. - Viscoelastic properties, rheology, viscosity, skimmed milk yoghurt'] | ['gnd:113003722', 'gnd:120092190', 'gnd:4073048-7', 'gnd:4134965-9', 'gnd:4139250-4', 'gnd:4329257-4', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846985586'] | ['Berger, Ralf G.', 'Hahn, Andreas', 'Joghurt', 'Milchproteine', 'Vernetzung (Chemie)', 'Laccase', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Strukturbildung in fermentierten Milchprodukten durch Laccasen aus Basidiomyceten']
### Abstract:
['Cross-linking, Laccase, Mediator, viskoelastische Eigenschaften, Rheologie, Magermilchjoghurt, Basidiomycota, Pleurotus eryngii, Viskosität. - Viscoelastic properties, rheology, viscosity, skimmed milk yoghurt']
### GND ID:
['gnd:113003722', 'gnd:120092190', 'gnd:4073048-7', 'gnd:4134965-9', 'gnd:4139250-4', 'gnd:4329257-4', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846985586']
### GND class:
['Berger, Ralf G.', 'Hahn, Andreas', 'Joghurt', 'Milchproteine', 'Vernetzung (Chemie)', 'Laccase', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A846991446.jsonld | ['Development of CO2-stable oxygen-transporting membranes for oxyfuel carbon capture process'] | ['Mixed ionic-electronic conductors, oxygen-transporting membranes, CO2 stability, perovskites, dual-phase membranes. - Gemischte Leiter, sauerstofftransportierende Membrane, CO2-Stabilität, Perowskite, zweiphasige Membrane'] | ['gnd:1081995130', 'gnd:4031648-8', 'gnd:4038571-1', 'gnd:4179219-1', 'gnd:4275319-3', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846991446'] | ['Partovi, Kaveh', 'Kohlendioxid', 'Membran', 'Sauerstofftransport', 'Perowskitstruktur', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Development of CO2-stable oxygen-transporting membranes for oxyfuel carbon capture process']
### Abstract:
['Mixed ionic-electronic conductors, oxygen-transporting membranes, CO2 stability, perovskites, dual-phase membranes. - Gemischte Leiter, sauerstofftransportierende Membrane, CO2-Stabilität, Perowskite, zweiphasige Membrane']
### GND ID:
['gnd:1081995130', 'gnd:4031648-8', 'gnd:4038571-1', 'gnd:4179219-1', 'gnd:4275319-3', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A846991446']
### GND class:
['Partovi, Kaveh', 'Kohlendioxid', 'Membran', 'Sauerstofftransport', 'Perowskitstruktur', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A847078914.jsonld | ['Dynamische Regel-und Reserveleistungsvorhaltung in zukünftigen Smart Grids'] | [['To ensure a constant power frequency the permanent balance of power demand and supply is the most crucial constraint in an electrical power system. Therefore there is a need for reserve and balancing power to cover prediction-deviations or unpredictable events. Due to the former hierarchical and centralized structure of the European electricity sector, the current design for the dimensioning of necessary reserves and its reliable provision is still a statical method. In contrast, the increase of generation from renewable resources makes the system become more and more decentralized and complex. The goal of this work is to identify today’s altered circumstances and to develop a dynamic strategy, which factors these in. The result is a flexible forecasting model based on methods of statistical learning, especially k-nearest neighbors and gradient boosting trees designed to predict future system imbalances. <engl.>', 'Zur Gewährleistung einer konstanten Netzfrequenz ist die ständige Balance zwischen Erzeugung und Verbrauch zu halten. Dazu wird permanent eine bestimmte Regel- und Reserveleistungsmenge bereitgehalten. Die aktuelle Art der Bereitstellung und Bemessung der Regelleistung beruht auf statischen analytischen Methoden, resultierend aus der ehemals hierarchisch und zentral geführten Struktur des Europäischen Energiesystems. Das Ziel dieses Dissertationsvorhabens ist das Aufzeigen der veränderten Einflussgrößen sowie die Anpassung der Regelleistungsbemessung an die heutigen zunehmend dezentralen Strukturen. Dabei liegt der Schwerpunkt in der Entwicklung eines flexiblen Prognosemodells zur Vorhersage der Systembilanzungleichgewichte und der damit verbundenen Regelleistungsbedarfe. Für dieses flexible Prognosemodell werden Methoden des maschinellen Lernens insbesondere der k-nächsten-Nachbarn (KNN) und der Gradient Boosting Trees (GBT) verwendet. <dt.>']] | ['gnd:140927565', 'gnd:4049560-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847078914'] | ['Lehnhoff, Sebastian', 'Reserveleistung'] | Document
### Title: ['Dynamische Regel-und Reserveleistungsvorhaltung in zukünftigen Smart Grids']
### Abstract:
[['To ensure a constant power frequency the permanent balance of power demand and supply is the most crucial constraint in an electrical power system. Therefore there is a need for reserve and balancing power to cover prediction-deviations or unpredictable events. Due to the former hierarchical and centralized structure of the European electricity sector, the current design for the dimensioning of necessary reserves and its reliable provision is still a statical method. In contrast, the increase of generation from renewable resources makes the system become more and more decentralized and complex. The goal of this work is to identify today’s altered circumstances and to develop a dynamic strategy, which factors these in. The result is a flexible forecasting model based on methods of statistical learning, especially k-nearest neighbors and gradient boosting trees designed to predict future system imbalances. <engl.>', 'Zur Gewährleistung einer konstanten Netzfrequenz ist die ständige Balance zwischen Erzeugung und Verbrauch zu halten. Dazu wird permanent eine bestimmte Regel- und Reserveleistungsmenge bereitgehalten. Die aktuelle Art der Bereitstellung und Bemessung der Regelleistung beruht auf statischen analytischen Methoden, resultierend aus der ehemals hierarchisch und zentral geführten Struktur des Europäischen Energiesystems. Das Ziel dieses Dissertationsvorhabens ist das Aufzeigen der veränderten Einflussgrößen sowie die Anpassung der Regelleistungsbemessung an die heutigen zunehmend dezentralen Strukturen. Dabei liegt der Schwerpunkt in der Entwicklung eines flexiblen Prognosemodells zur Vorhersage der Systembilanzungleichgewichte und der damit verbundenen Regelleistungsbedarfe. Für dieses flexible Prognosemodell werden Methoden des maschinellen Lernens insbesondere der k-nächsten-Nachbarn (KNN) und der Gradient Boosting Trees (GBT) verwendet. <dt.>']]
### GND ID:
['gnd:140927565', 'gnd:4049560-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847078914']
### GND class:
['Lehnhoff, Sebastian', 'Reserveleistung']
<|eot_id|> |
3A847093034.jsonld | ['Metalldekorierte Graphite als Anodenmaterialien für den Einsatz in Lithium-Ionen-Akkumulatoren'] | ['Lithium-Ionen-Batterie, Metallcarboxylate, Metalldekorationen, Graphit, Katalyse. - Lithium ion battery, metal carboxylates, metal coatings, graphite, catalysis'] | ['gnd:108256251', 'gnd:131454617', 'gnd:4047925-0', 'gnd:4147327-9', 'gnd:4158067-9', 'gnd:4169640-2', 'gnd:64681-7', 'gnd:7681721-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847093034'] | ['Binnewies, Michael', 'Renz, Franz', 'Pyrolyse', 'Carboxylate', 'Grafit', 'Metallverbindungen', 'Gottfried Wilhelm Leibniz Universität Hannover', 'Lithium-Ionen-Akkumulator'] | Document
### Title: ['Metalldekorierte Graphite als Anodenmaterialien für den Einsatz in Lithium-Ionen-Akkumulatoren']
### Abstract:
['Lithium-Ionen-Batterie, Metallcarboxylate, Metalldekorationen, Graphit, Katalyse. - Lithium ion battery, metal carboxylates, metal coatings, graphite, catalysis']
### GND ID:
['gnd:108256251', 'gnd:131454617', 'gnd:4047925-0', 'gnd:4147327-9', 'gnd:4158067-9', 'gnd:4169640-2', 'gnd:64681-7', 'gnd:7681721-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847093034']
### GND class:
['Binnewies, Michael', 'Renz, Franz', 'Pyrolyse', 'Carboxylate', 'Grafit', 'Metallverbindungen', 'Gottfried Wilhelm Leibniz Universität Hannover', 'Lithium-Ionen-Akkumulator']
<|eot_id|> |
3A847149692.jsonld | ['Nature conservation evaluation of strictly protected forest reserves : an exemplary application in Germany'] | ['Zusammenfassung: Strictly protected forest reserves (SPFRs) in which forests are allowed to develop naturally were the focus of this study. In these reserves human interventions are excluded and it is expected that native and site specific biodiversity will be higher than in managed forests. This is mainly due to the space and time made available in the SPFRs for the development of forest structure and dynamic processes. Very little primeval forest remains in Central Europe to halt the loss of biodiversity. Therefore an aim of the German national strategy to protect biodiversity is to set aside 5% of the existing forest area by 2020 where it will be allowed to develop naturally. To find out if the aim has been reached quantitatively and qualitatively it is not enough to just sum up the areas of all SPFRs in Germany. Therefore, the objective of this study was to develop a method that can qualitatively evaluate the capability of SPFRs to protect biodiversity on the national level and to evaluate the current SPFR system’s contribution to biodiversity protection. First a literature review was done which focused on conservation evaluations and the criteria and indicators that might be useful for evaluating unmanaged forest in Central Europe. Based on the review, a framework for the selection of criteria, covering the temporal, spatial and functional dimensions of biodiversity evaluation was established. The criteria and indicators best suitable to evaluate the SPFRs were carefully selected. Afterwards a nature conservation evaluation concept was developed to determine how effective existing SPFRs contribute to the protection of biodiversity. Furthermore, the identification of nature conservation targets was needed to do a complete evaluation of the prerequisites and to evaluate the contribution of SPFRs in Germany to protect biodiversity. Due to the criteria-wise evaluation and the evaluation of the conservation targets, gaps at different levels could be made visible and the effectiveness of the current SPFR system to conserve characteristic forest biodiversity was presented. The planning and selection of additional SPFRs based on the evaluation scheme can now be accomplished systematically and effectively'] | ['gnd:108184437X', 'gnd:4011882-4', 'gnd:4053659-2', 'gnd:4841998-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847149692'] | ['Schultze, Juliane', 'Deutschland', 'Schutzwald', 'Prozessschutz'] | Document
### Title: ['Nature conservation evaluation of strictly protected forest reserves : an exemplary application in Germany']
### Abstract:
['Zusammenfassung: Strictly protected forest reserves (SPFRs) in which forests are allowed to develop naturally were the focus of this study. In these reserves human interventions are excluded and it is expected that native and site specific biodiversity will be higher than in managed forests. This is mainly due to the space and time made available in the SPFRs for the development of forest structure and dynamic processes. Very little primeval forest remains in Central Europe to halt the loss of biodiversity. Therefore an aim of the German national strategy to protect biodiversity is to set aside 5% of the existing forest area by 2020 where it will be allowed to develop naturally. To find out if the aim has been reached quantitatively and qualitatively it is not enough to just sum up the areas of all SPFRs in Germany. Therefore, the objective of this study was to develop a method that can qualitatively evaluate the capability of SPFRs to protect biodiversity on the national level and to evaluate the current SPFR system’s contribution to biodiversity protection. First a literature review was done which focused on conservation evaluations and the criteria and indicators that might be useful for evaluating unmanaged forest in Central Europe. Based on the review, a framework for the selection of criteria, covering the temporal, spatial and functional dimensions of biodiversity evaluation was established. The criteria and indicators best suitable to evaluate the SPFRs were carefully selected. Afterwards a nature conservation evaluation concept was developed to determine how effective existing SPFRs contribute to the protection of biodiversity. Furthermore, the identification of nature conservation targets was needed to do a complete evaluation of the prerequisites and to evaluate the contribution of SPFRs in Germany to protect biodiversity. Due to the criteria-wise evaluation and the evaluation of the conservation targets, gaps at different levels could be made visible and the effectiveness of the current SPFR system to conserve characteristic forest biodiversity was presented. The planning and selection of additional SPFRs based on the evaluation scheme can now be accomplished systematically and effectively']
### GND ID:
['gnd:108184437X', 'gnd:4011882-4', 'gnd:4053659-2', 'gnd:4841998-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847149692']
### GND class:
['Schultze, Juliane', 'Deutschland', 'Schutzwald', 'Prozessschutz']
<|eot_id|> |
3A847150895.jsonld | ['Silicon nanocrystals in various dielectric matrices : structural and optical properties'] | ['Zusammenfassung: AbstractThis dissertation is focused on the fundamental investigation of Si nanocrystals formed in annealed Si rich/stoichiometric dielectric multilayered structures. The films are prepared by size-controlled superlattices approach previously widely applied to SiOx/SiO2 superlattices. While a deep understanding of fundamental properties of Si nanocrystals in SiOx matrix has been already achieved, most of the results published on silicon nanocrystals in SiNx do not represent a clear understanding and sometimes even contradict to each other.Thereby, a starting point of the present research is a detailed study of Si nanocrystals embedded in Si nitride matrix. A careful development of plasma-enhanced chemical vapor deposition parameters allowed the deposition of optimized SiNx/Si3N4 superlattices of various SiNx thicknesses, which were further annealed in order to form Si nanocrystals of various sizes. Based on transmission electron microscopy and X-ray diffraction analysis, the formation of size-controlled Si nanocrystals of various sizes is confirmed. Despite photoluminescence spectra of these samples demonstrate the expected PL blue shift with the decrease of Si nanocrystal size, the shift is confirmed to be an optical artifact. The results presented here can explain a disagreement of the recent reports published on Si nanocrystals in SiNx matrix by other groups, as the photoluminescence peak shift is sometimes wrongly interpreted as nanocrystal size effect. Additionally, according to the concluded issues, novel hetero-combinations, which contain both silicon nitride and silicon oxide sublayers are proposed and realized. Although SiNx/SiO2 and SiOxNy/Si3N4 hetero-structures might show some benefits in optical and electrical properties compared to the standard SiOx/SiO2 and SiNx/Si3N4 superlattices, they have been only very barely studied previously. In the present work it is shown that high-temperature annealing leads to the destruction of SiNx/SiO2 hetero-superlattice, and Si nanocrystals of uncontrollable sizes irregularly distributed within the film are formed. At the same time SiOxNy/Si3N4 hetero-structure sustains high-temperature annealing and size-controlled Si nanocrystals demonstrate quantum luminescence'] | ['gnd:108182929X', 'gnd:7574326-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847150895'] | ['Zelenina, Anastasiya', 'Nanokristall'] | Document
### Title: ['Silicon nanocrystals in various dielectric matrices : structural and optical properties']
### Abstract:
['Zusammenfassung: AbstractThis dissertation is focused on the fundamental investigation of Si nanocrystals formed in annealed Si rich/stoichiometric dielectric multilayered structures. The films are prepared by size-controlled superlattices approach previously widely applied to SiOx/SiO2 superlattices. While a deep understanding of fundamental properties of Si nanocrystals in SiOx matrix has been already achieved, most of the results published on silicon nanocrystals in SiNx do not represent a clear understanding and sometimes even contradict to each other.Thereby, a starting point of the present research is a detailed study of Si nanocrystals embedded in Si nitride matrix. A careful development of plasma-enhanced chemical vapor deposition parameters allowed the deposition of optimized SiNx/Si3N4 superlattices of various SiNx thicknesses, which were further annealed in order to form Si nanocrystals of various sizes. Based on transmission electron microscopy and X-ray diffraction analysis, the formation of size-controlled Si nanocrystals of various sizes is confirmed. Despite photoluminescence spectra of these samples demonstrate the expected PL blue shift with the decrease of Si nanocrystal size, the shift is confirmed to be an optical artifact. The results presented here can explain a disagreement of the recent reports published on Si nanocrystals in SiNx matrix by other groups, as the photoluminescence peak shift is sometimes wrongly interpreted as nanocrystal size effect. Additionally, according to the concluded issues, novel hetero-combinations, which contain both silicon nitride and silicon oxide sublayers are proposed and realized. Although SiNx/SiO2 and SiOxNy/Si3N4 hetero-structures might show some benefits in optical and electrical properties compared to the standard SiOx/SiO2 and SiNx/Si3N4 superlattices, they have been only very barely studied previously. In the present work it is shown that high-temperature annealing leads to the destruction of SiNx/SiO2 hetero-superlattice, and Si nanocrystals of uncontrollable sizes irregularly distributed within the film are formed. At the same time SiOxNy/Si3N4 hetero-structure sustains high-temperature annealing and size-controlled Si nanocrystals demonstrate quantum luminescence']
### GND ID:
['gnd:108182929X', 'gnd:7574326-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847150895']
### GND class:
['Zelenina, Anastasiya', 'Nanokristall']
<|eot_id|> |
3A847158233.jsonld | ['Ein Beitrag zum Ausbreitungsverhalten modaler Schallfelder in Niederdruckturbinen'] | ['Aeroakustik, Schalltransport, Turbine, Modenanalyse. - Aero acoustics, sound progagation, modal analysis'] | ['gnd:1098216199', 'gnd:4121611-8', 'gnd:4134466-2', 'gnd:4179359-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847158233'] | ['Bartelt, Michael', 'Schallfeld', 'Niederdruckdampfturbine', 'Schallausbreitung', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Ein Beitrag zum Ausbreitungsverhalten modaler Schallfelder in Niederdruckturbinen']
### Abstract:
['Aeroakustik, Schalltransport, Turbine, Modenanalyse. - Aero acoustics, sound progagation, modal analysis']
### GND ID:
['gnd:1098216199', 'gnd:4121611-8', 'gnd:4134466-2', 'gnd:4179359-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847158233']
### GND class:
['Bartelt, Michael', 'Schallfeld', 'Niederdruckdampfturbine', 'Schallausbreitung', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A847289923.jsonld | ['Spot evolution on the red giant star XX Triangulum'] | ['Spots on stellar surfaces are thought to be stellar analogues of sunspots. Thus, starspots are direct manifestations of strong magnetic fields. Their decay rate is directly related to the magnetic diffusivity, which itself is a key quantity for the deduction of an activity cycle length. So far, no single starspot decay has been observed, and thus no stellar activity cycle was inferred from its corresponding turbulent diffusivity.We investigate the evolution of starspots on the rapidly-rotating K0 giant XX Triangulum. Continuous high-resolution and phase-resolved spectroscopy was obtained with the robotic 1.2-m STELLA telescope on Tenerife over a timespan of six years. With our line-profile inversion code iMap we reconstruct a total of 36 consecutive Doppler maps. To quantify starspot area decay and growth, we match the observed images with simplified spot models based on a Monte-Carlo approach. It is shown that the surface of XX Tri is covered with large high-latitude and even polar spots and with occasional small equatorial spots.…'] | ['gnd:1082313076', 'gnd:118008218', 'gnd:2120681-8', 'gnd:4816787-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847289923'] | ['Künstler, Andreas', 'Strassmeier, Klaus G.', 'Universität Potsdam', 'Sternfleck'] | Document
### Title: ['Spot evolution on the red giant star XX Triangulum']
### Abstract:
['Spots on stellar surfaces are thought to be stellar analogues of sunspots. Thus, starspots are direct manifestations of strong magnetic fields. Their decay rate is directly related to the magnetic diffusivity, which itself is a key quantity for the deduction of an activity cycle length. So far, no single starspot decay has been observed, and thus no stellar activity cycle was inferred from its corresponding turbulent diffusivity.We investigate the evolution of starspots on the rapidly-rotating K0 giant XX Triangulum. Continuous high-resolution and phase-resolved spectroscopy was obtained with the robotic 1.2-m STELLA telescope on Tenerife over a timespan of six years. With our line-profile inversion code iMap we reconstruct a total of 36 consecutive Doppler maps. To quantify starspot area decay and growth, we match the observed images with simplified spot models based on a Monte-Carlo approach. It is shown that the surface of XX Tri is covered with large high-latitude and even polar spots and with occasional small equatorial spots.…']
### GND ID:
['gnd:1082313076', 'gnd:118008218', 'gnd:2120681-8', 'gnd:4816787-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847289923']
### GND class:
['Künstler, Andreas', 'Strassmeier, Klaus G.', 'Universität Potsdam', 'Sternfleck']
<|eot_id|> |
3A847405656.jsonld | ['Charge dynamics in organic semiconductors : from chemical structures to devices'] | ['"In the field of organic semiconductors researchers and manufacturers are faced with a wide range of potential molecules. This work presents concepts for simulation-based predictions of material characteristics starting from chemical stuctures. The focus lies on charge transport - be it in microscopic models of amorphous morphologies, lattice models or large-scale device models. An extensive introductory review, which also includes experimental techniques, makes this work interesting for a broad readership"--'] | ['gnd:138915261', 'gnd:4166400-0', 'gnd:4172780-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847405656'] | ['Kordt, Pascal', 'Ladungstransport', 'Organischer Halbleiter'] | Document
### Title: ['Charge dynamics in organic semiconductors : from chemical structures to devices']
### Abstract:
['"In the field of organic semiconductors researchers and manufacturers are faced with a wide range of potential molecules. This work presents concepts for simulation-based predictions of material characteristics starting from chemical stuctures. The focus lies on charge transport - be it in microscopic models of amorphous morphologies, lattice models or large-scale device models. An extensive introductory review, which also includes experimental techniques, makes this work interesting for a broad readership"--']
### GND ID:
['gnd:138915261', 'gnd:4166400-0', 'gnd:4172780-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847405656']
### GND class:
['Kordt, Pascal', 'Ladungstransport', 'Organischer Halbleiter']
<|eot_id|> |
3A847799069.jsonld | ['Towards a synthesis of (-)-actinophyllic acid : applying the divinylcyclopropane rearrangement to the synthesis of indole alkaloids'] | ['Total synthesis, alkaloids, divinylcyclopropane rearrangement. - Totalsynthese, Alkaloide, Divinylcyclopropanumlagerung'] | ['gnd:4135603-2', 'gnd:4161560-8', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847799069'] | ['Asymmetrische Synthese', 'Indolalkaloide', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Towards a synthesis of (-)-actinophyllic acid : applying the divinylcyclopropane rearrangement to the synthesis of indole alkaloids']
### Abstract:
['Total synthesis, alkaloids, divinylcyclopropane rearrangement. - Totalsynthese, Alkaloide, Divinylcyclopropanumlagerung']
### GND ID:
['gnd:4135603-2', 'gnd:4161560-8', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847799069']
### GND class:
['Asymmetrische Synthese', 'Indolalkaloide', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A847804941.jsonld | ['Metalldekorierte Graphite als Anodenmaterialien für den Einsatz in Lithium-Ionen-Akkumulatoren'] | ['Lithium-Ionen-Batterie, Metallcarboxylate, Metalldekorationen, Graphit, Katalyse. - Lithium ion battery, metal carboxylates, metal coatings, graphite, catalysis'] | ['gnd:108256251', 'gnd:131454617', 'gnd:4047925-0', 'gnd:4147327-9', 'gnd:4158067-9', 'gnd:4169640-2', 'gnd:64681-7', 'gnd:7681721-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847804941'] | ['Binnewies, Michael', 'Renz, Franz', 'Pyrolyse', 'Carboxylate', 'Grafit', 'Metallverbindungen', 'Gottfried Wilhelm Leibniz Universität Hannover', 'Lithium-Ionen-Akkumulator'] | Document
### Title: ['Metalldekorierte Graphite als Anodenmaterialien für den Einsatz in Lithium-Ionen-Akkumulatoren']
### Abstract:
['Lithium-Ionen-Batterie, Metallcarboxylate, Metalldekorationen, Graphit, Katalyse. - Lithium ion battery, metal carboxylates, metal coatings, graphite, catalysis']
### GND ID:
['gnd:108256251', 'gnd:131454617', 'gnd:4047925-0', 'gnd:4147327-9', 'gnd:4158067-9', 'gnd:4169640-2', 'gnd:64681-7', 'gnd:7681721-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847804941']
### GND class:
['Binnewies, Michael', 'Renz, Franz', 'Pyrolyse', 'Carboxylate', 'Grafit', 'Metallverbindungen', 'Gottfried Wilhelm Leibniz Universität Hannover', 'Lithium-Ionen-Akkumulator']
<|eot_id|> |
3A847936414.jsonld | ['Phase retrieval for object and probe in the optical near-field'] | ['Lensless, holographic X-ray microscopy is a non-invasive imaging technique that provides resolution on the nanometer scale. Therefore, a divergent, coherent and especially clean wave front impinging on the sample is needed. Yet, focusing X-rays by even the most advanced X-ray mirrors causes so called figure errors of high spatial frequency content. The results are strongly deteriorated intensity profiles that are often even more pronounced than the holographic image of the sample itself. A common strategy to compensate these figure errors is to divide the hologram by the pure intensity profile of the beam (the so called flat field). However, this division is only valid in the limiting case of an illumination focused down to a point source. In reality, as a consequence of a fi nite spot size, one has to accept a loss in resolution when performing the flat field correction. An approach different from the described straightforward procedure is necessary. Here, the simultaneous reconstruction of object and probe is proposed using holograms which were not flat field corrected before phase retrieval. To this end, a method has been developed that allows simultaneously reconstructing object and probe in amplitude and phase from holographic intensity recordings. The experimental way of proceeding was mainly inspired by well-established holographic full-field X-ray imaging techniques that require holograms defocused to different degrees. Consequently, the conclusion seems reasonable that diversity in the optical near-field arises mainly from variation of the propagation distance of light. This so called longitudinal diversity is used to properly phase the transmission function of the sample of interest. The algorithmic strategy of simultaneous phase retrieval for object and probe draws on far-field ptychography where lateral translations of the sample create diverse diffraction patterns. In view of the need for longitudinal diversity realized by shifts of the sample along the optical axis, ptychography has been generalized and adapted for the optical near-field. Hence, translations of the sample in all three dimensions of space need to be exploited to collect enough information about object and probe such that both can be reconstructed simultaneously in amplitude and phase. Concepts have been put into practice by simulations as well as by experiments with coherent visible light and hard X-rays from synchrotron sources. The presented approach offers the opportunity to perform high resolution imaging, to be extended to tomography and to be adapted to super-resolution experiments.'] | ['gnd:4025643-1', 'gnd:4178315-3', 'gnd:4739877-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847936414'] | ['Holografie', 'Röntgenmikroskopie', 'Nahfeldoptik'] | Document
### Title: ['Phase retrieval for object and probe in the optical near-field']
### Abstract:
['Lensless, holographic X-ray microscopy is a non-invasive imaging technique that provides resolution on the nanometer scale. Therefore, a divergent, coherent and especially clean wave front impinging on the sample is needed. Yet, focusing X-rays by even the most advanced X-ray mirrors causes so called figure errors of high spatial frequency content. The results are strongly deteriorated intensity profiles that are often even more pronounced than the holographic image of the sample itself. A common strategy to compensate these figure errors is to divide the hologram by the pure intensity profile of the beam (the so called flat field). However, this division is only valid in the limiting case of an illumination focused down to a point source. In reality, as a consequence of a fi nite spot size, one has to accept a loss in resolution when performing the flat field correction. An approach different from the described straightforward procedure is necessary. Here, the simultaneous reconstruction of object and probe is proposed using holograms which were not flat field corrected before phase retrieval. To this end, a method has been developed that allows simultaneously reconstructing object and probe in amplitude and phase from holographic intensity recordings. The experimental way of proceeding was mainly inspired by well-established holographic full-field X-ray imaging techniques that require holograms defocused to different degrees. Consequently, the conclusion seems reasonable that diversity in the optical near-field arises mainly from variation of the propagation distance of light. This so called longitudinal diversity is used to properly phase the transmission function of the sample of interest. The algorithmic strategy of simultaneous phase retrieval for object and probe draws on far-field ptychography where lateral translations of the sample create diverse diffraction patterns. In view of the need for longitudinal diversity realized by shifts of the sample along the optical axis, ptychography has been generalized and adapted for the optical near-field. Hence, translations of the sample in all three dimensions of space need to be exploited to collect enough information about object and probe such that both can be reconstructed simultaneously in amplitude and phase. Concepts have been put into practice by simulations as well as by experiments with coherent visible light and hard X-rays from synchrotron sources. The presented approach offers the opportunity to perform high resolution imaging, to be extended to tomography and to be adapted to super-resolution experiments.']
### GND ID:
['gnd:4025643-1', 'gnd:4178315-3', 'gnd:4739877-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847936414']
### GND class:
['Holografie', 'Röntgenmikroskopie', 'Nahfeldoptik']
<|eot_id|> |
3A84796941X.jsonld | ['The Plasma membrane Intrinsic Proteins (PIPs) in grey poplar Populus . canescens -identification of the PIP gene family and characterization of its function on multi-scale'] | ['Zusammenfassung: This PhD thesis provides a molecular and physiological evaluation of the functionality of the PIP subfamily of aquaporins in leaf water relations and CO2 flux, of grey poplar (Populus x canescens) as a tree model system.Plasma membrane intrinsic proteins (PIPs) are widely studied in herbaceous plants; however, little is known regarding their role in water and CO2 transport in woody species. In the perennial woody plant Populus × canescens, 15 PIP genes were cloned and, according to the phylogenic analysis, all these genes had high homology with their Populus trichocarpa orthologs. The transcript abundance of the 15 PcPIP genes was examined in six different tissues of Populus × canescens, including young/mature/old leaves, roots, phloem and xylem. All PcPIP genes, except PIP2;8 and PIP2;10, were expressed in all above mentioned tissues. However, significant difference was present at the level of expression. To reveal the function of PIPs in poplar, transgenic poplar plants were generated in which the translation of PIP genes was down-regulated by RNA interference (RNAi). To target the two main groups of PIPs two specific RNAi cassettes for PIP1 and PIP2 genes were constructed. The on/off-target analysis revealed no additional targets of the two RNAi sequences besides PIP genes. With the PcPIP-RNAi transgenic plants, molecular screening was done on the transcript level by semi-quantitative RT-PCR and on the protein level by ELISA respectively. Based on these results, three PcPIP-RNAi transgenic lines were selected, in which PIP genes were the most down regulated.With the selected PcPIP-RNAi transgenic lines, a series of physiological and morphological studies were performed to characterize the plant’s response under optimal and multi-scale stress (elevated CO2, drought and heat stress) conditions. Under optimal conditions, the leaves of the PcPIP-RNAi transgenic lines had wider opened stomata and therefore had a higher net CO2 assimilation and transpiration rate compared with the wild type (WT) and empty vector control (EV) plants. As a consequence of the re-organization of the cellular structures, the leaves from PcPIP-RNAi transgenic plants had greater mesophyll conductance for CO2 (gm), higher leaf hydraulic conductance (Kleaf) and higher apoplastic water flux and overall, the leaves were smaller. Based on these results, it is concluded that PIP proteins not only play essential roles in whole leaf water and CO2 flux but also have impo ...'] | ['gnd:108230168X', 'gnd:4173223-6', 'gnd:4443397-9', 'gnd:4606443-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84796941X'] | ['Bi, Zhen', 'Pappel', 'Stofftransport (Biologie)', 'Aquaporine'] | Document
### Title: ['The Plasma membrane Intrinsic Proteins (PIPs) in grey poplar Populus . canescens -identification of the PIP gene family and characterization of its function on multi-scale']
### Abstract:
['Zusammenfassung: This PhD thesis provides a molecular and physiological evaluation of the functionality of the PIP subfamily of aquaporins in leaf water relations and CO2 flux, of grey poplar (Populus x canescens) as a tree model system.Plasma membrane intrinsic proteins (PIPs) are widely studied in herbaceous plants; however, little is known regarding their role in water and CO2 transport in woody species. In the perennial woody plant Populus × canescens, 15 PIP genes were cloned and, according to the phylogenic analysis, all these genes had high homology with their Populus trichocarpa orthologs. The transcript abundance of the 15 PcPIP genes was examined in six different tissues of Populus × canescens, including young/mature/old leaves, roots, phloem and xylem. All PcPIP genes, except PIP2;8 and PIP2;10, were expressed in all above mentioned tissues. However, significant difference was present at the level of expression. To reveal the function of PIPs in poplar, transgenic poplar plants were generated in which the translation of PIP genes was down-regulated by RNA interference (RNAi). To target the two main groups of PIPs two specific RNAi cassettes for PIP1 and PIP2 genes were constructed. The on/off-target analysis revealed no additional targets of the two RNAi sequences besides PIP genes. With the PcPIP-RNAi transgenic plants, molecular screening was done on the transcript level by semi-quantitative RT-PCR and on the protein level by ELISA respectively. Based on these results, three PcPIP-RNAi transgenic lines were selected, in which PIP genes were the most down regulated.With the selected PcPIP-RNAi transgenic lines, a series of physiological and morphological studies were performed to characterize the plant’s response under optimal and multi-scale stress (elevated CO2, drought and heat stress) conditions. Under optimal conditions, the leaves of the PcPIP-RNAi transgenic lines had wider opened stomata and therefore had a higher net CO2 assimilation and transpiration rate compared with the wild type (WT) and empty vector control (EV) plants. As a consequence of the re-organization of the cellular structures, the leaves from PcPIP-RNAi transgenic plants had greater mesophyll conductance for CO2 (gm), higher leaf hydraulic conductance (Kleaf) and higher apoplastic water flux and overall, the leaves were smaller. Based on these results, it is concluded that PIP proteins not only play essential roles in whole leaf water and CO2 flux but also have impo ...']
### GND ID:
['gnd:108230168X', 'gnd:4173223-6', 'gnd:4443397-9', 'gnd:4606443-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84796941X']
### GND class:
['Bi, Zhen', 'Pappel', 'Stofftransport (Biologie)', 'Aquaporine']
<|eot_id|> |
3A847970841.jsonld | ['Vulnerability assessment of nitrate leaching on the regional scale using isotope techniques'] | ['Zusammenfassung: Groundwater is an important source of drinking water, but its quality is threatened by contamination with nitrate. In order to prevent groundwater contamination, knowledge about potential nitrate sources, their pathways and time lag between sources and drinking water wells is required. Still, i) simple methods to quantify nitrate fluxes are missing, ii) the applicability of stable isotopes of nitrate in nitrate source identification in grassland systems remains unknown, and iii) there is a lack of physically based modeling approaches focusing on the spatially resolved estimation of groundwater vulnerability to nitrate contamination. Thus, the objectives of the thesis are to i) quantify nitrate leaching in soils, ii) identify major sources of nitrate in aquifers, and iii) determine the intrinsic and nitrate specific aquifer vulnerability. The objectives were realized in a pre-alpine area with oligotrophic aquifers used for drinking water supply. Different isotopic and environmental tracers were used to understand the local hydrogeology and the fate of nitrate and related dynamic transformation processes. At farmed grassland sites, analysis of nitrate concentration in soil water below the root zone using suction cups was combined with groundwater recharge rates estimated from vertical deuterium profiles in soil to calculate nitrate fluxes. Stable isotopes of nitrate were analyzed in surface water, soil water and groundwater and compared with the distinct isotope composition of nitrate in potential sources. Local tritium concentrations were used in combination with a lumped-parameter model to calculate the mean residence times (MRTt) and MRTt distributions of local groundwater wells. The intrinsic and nitrate specific vulnerability of groundwater was spatially assessed (GIS) based on the approximation of the total mean residence time (MRT) and the residence time distribution as well as consulting data on nitrate leaching.Measured nitrate concentration below the root zone varies between 0 and 90 mg NO3- L-1. Estimated groundwater recharge rates cover a range of 430 to 926 mm yr-1. Nitrate leaching (0.2 to 41 kg NO3-N ha-1 yr-1) at grassland sites is highest in spring and fall. At farmed sites, nitrate leaching is positively related to fertilizer input rather than land use category (organic, conventional). Nitrate isotope values indicate that nitrate derive from ammonium nitrification of multiple sources, such as atmospheric deposition, mineral ...'] | ['gnd:1082241954', 'gnd:4007420-1', 'gnd:4022369-3', 'gnd:4115398-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847970841'] | ['Stoewer, Myriam Maria', 'Bodenwasser', 'Grundwasser', 'Nitrate'] | Document
### Title: ['Vulnerability assessment of nitrate leaching on the regional scale using isotope techniques']
### Abstract:
['Zusammenfassung: Groundwater is an important source of drinking water, but its quality is threatened by contamination with nitrate. In order to prevent groundwater contamination, knowledge about potential nitrate sources, their pathways and time lag between sources and drinking water wells is required. Still, i) simple methods to quantify nitrate fluxes are missing, ii) the applicability of stable isotopes of nitrate in nitrate source identification in grassland systems remains unknown, and iii) there is a lack of physically based modeling approaches focusing on the spatially resolved estimation of groundwater vulnerability to nitrate contamination. Thus, the objectives of the thesis are to i) quantify nitrate leaching in soils, ii) identify major sources of nitrate in aquifers, and iii) determine the intrinsic and nitrate specific aquifer vulnerability. The objectives were realized in a pre-alpine area with oligotrophic aquifers used for drinking water supply. Different isotopic and environmental tracers were used to understand the local hydrogeology and the fate of nitrate and related dynamic transformation processes. At farmed grassland sites, analysis of nitrate concentration in soil water below the root zone using suction cups was combined with groundwater recharge rates estimated from vertical deuterium profiles in soil to calculate nitrate fluxes. Stable isotopes of nitrate were analyzed in surface water, soil water and groundwater and compared with the distinct isotope composition of nitrate in potential sources. Local tritium concentrations were used in combination with a lumped-parameter model to calculate the mean residence times (MRTt) and MRTt distributions of local groundwater wells. The intrinsic and nitrate specific vulnerability of groundwater was spatially assessed (GIS) based on the approximation of the total mean residence time (MRT) and the residence time distribution as well as consulting data on nitrate leaching.Measured nitrate concentration below the root zone varies between 0 and 90 mg NO3- L-1. Estimated groundwater recharge rates cover a range of 430 to 926 mm yr-1. Nitrate leaching (0.2 to 41 kg NO3-N ha-1 yr-1) at grassland sites is highest in spring and fall. At farmed sites, nitrate leaching is positively related to fertilizer input rather than land use category (organic, conventional). Nitrate isotope values indicate that nitrate derive from ammonium nitrification of multiple sources, such as atmospheric deposition, mineral ...']
### GND ID:
['gnd:1082241954', 'gnd:4007420-1', 'gnd:4022369-3', 'gnd:4115398-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847970841']
### GND class:
['Stoewer, Myriam Maria', 'Bodenwasser', 'Grundwasser', 'Nitrate']
<|eot_id|> |
3A847990729.jsonld | ['Direct democracy, voter turnout and representative behavior : essays in political economics'] | ['This thesis comprises four empirical research papers in the area of political economics. While the first two chapters deal with questions related to direct democracy, chapters three and four are about topics linked to representative democracy.'] | ['gnd:1045333093', 'gnd:2116123-9', 'gnd:4000135-0', 'gnd:4005044-0', 'gnd:4005194-8', 'gnd:4008764-5', 'gnd:4008774-8', 'gnd:4011882-4', 'gnd:4041509-0', 'gnd:4046584-6', 'gnd:4074523-5', 'gnd:4134790-0', 'gnd:4134792-4', 'gnd:4140367-8', 'gnd:4187141-8', 'gnd:4202523-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847990729'] | ['Arnold, Felix', 'Deutschland Deutscher Bundestag', 'Abgeordneter', 'Bayern', 'Bedingung', 'Bürger', 'Bürgerinitiative', 'Deutschland', 'Nebentätigkeit', 'Politisches System', 'Mandat', 'Volksabstimmung', 'Direkte Demokratie', 'Unterschrift', 'Unzufriedenheit', 'Arbeitsverhalten'] | Document
### Title: ['Direct democracy, voter turnout and representative behavior : essays in political economics']
### Abstract:
['This thesis comprises four empirical research papers in the area of political economics. While the first two chapters deal with questions related to direct democracy, chapters three and four are about topics linked to representative democracy.']
### GND ID:
['gnd:1045333093', 'gnd:2116123-9', 'gnd:4000135-0', 'gnd:4005044-0', 'gnd:4005194-8', 'gnd:4008764-5', 'gnd:4008774-8', 'gnd:4011882-4', 'gnd:4041509-0', 'gnd:4046584-6', 'gnd:4074523-5', 'gnd:4134790-0', 'gnd:4134792-4', 'gnd:4140367-8', 'gnd:4187141-8', 'gnd:4202523-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A847990729']
### GND class:
['Arnold, Felix', 'Deutschland Deutscher Bundestag', 'Abgeordneter', 'Bayern', 'Bedingung', 'Bürger', 'Bürgerinitiative', 'Deutschland', 'Nebentätigkeit', 'Politisches System', 'Mandat', 'Volksabstimmung', 'Direkte Demokratie', 'Unterschrift', 'Unzufriedenheit', 'Arbeitsverhalten']
<|eot_id|> |
3A848034104.jsonld | ['Heterologe Expression von Enzymen aus Basidiomyceten in Pichia pastoris'] | ['Basidiomycota, Ferulasäure-Esterase, feruloylierte Saccharide, heterologe Expression, Lipoxygenase, Pichia pastoris, Pleurotus sapidus. - Feruloyl esterase, feruloyated saccharides, heterologous expression'] | ['gnd:113003722', 'gnd:4014988-2', 'gnd:4077821-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848034104'] | ['Berger, Ralf G.', 'Enzym', 'Ständerpilze', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Heterologe Expression von Enzymen aus Basidiomyceten in Pichia pastoris']
### Abstract:
['Basidiomycota, Ferulasäure-Esterase, feruloylierte Saccharide, heterologe Expression, Lipoxygenase, Pichia pastoris, Pleurotus sapidus. - Feruloyl esterase, feruloyated saccharides, heterologous expression']
### GND ID:
['gnd:113003722', 'gnd:4014988-2', 'gnd:4077821-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848034104']
### GND class:
['Berger, Ralf G.', 'Enzym', 'Ständerpilze', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A848314484.jsonld | ['Ein Beitrag zum Ausbreitungsverhalten modaler Schallfelder in Niederdruckturbinen'] | ['Aeroakustik, Schalltransport, Turbine, Modenanalyse. - Aero acoustics, sound progagation, modal analysis'] | ['gnd:1098216199', 'gnd:4134466-2', 'gnd:4179359-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848314484'] | ['Bartelt, Michael', 'Niederdruckdampfturbine', 'Schallausbreitung', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Ein Beitrag zum Ausbreitungsverhalten modaler Schallfelder in Niederdruckturbinen']
### Abstract:
['Aeroakustik, Schalltransport, Turbine, Modenanalyse. - Aero acoustics, sound progagation, modal analysis']
### GND ID:
['gnd:1098216199', 'gnd:4134466-2', 'gnd:4179359-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848314484']
### GND class:
['Bartelt, Michael', 'Niederdruckdampfturbine', 'Schallausbreitung', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A848417666.jsonld | ['Monstrosität : Abweichungen in Literatur und Wissenschaften des 19. Jahrhunderts'] | ['"The study examines the parallel emergence of a new paradigm of deviation in literature and science. From Hoffmann and Poe to Henry James, from medical teratology and early psychiatry to the theory of evolution, the book traces the development of a modern dialectic of the defiguration and refiguration of monstrous forms."--'] | ['gnd:10095502-2', 'gnd:1051999782', 'gnd:4035964-5', 'gnd:4125698-0', 'gnd:7707447-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848417666'] | ['Walter de Gruyter GmbH & Co. KG', 'Howe, Jan Niklas', 'Literatur', 'Kultur', 'Das Monströse'] | Document
### Title: ['Monstrosität : Abweichungen in Literatur und Wissenschaften des 19. Jahrhunderts']
### Abstract:
['"The study examines the parallel emergence of a new paradigm of deviation in literature and science. From Hoffmann and Poe to Henry James, from medical teratology and early psychiatry to the theory of evolution, the book traces the development of a modern dialectic of the defiguration and refiguration of monstrous forms."--']
### GND ID:
['gnd:10095502-2', 'gnd:1051999782', 'gnd:4035964-5', 'gnd:4125698-0', 'gnd:7707447-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848417666']
### GND class:
['Walter de Gruyter GmbH & Co. KG', 'Howe, Jan Niklas', 'Literatur', 'Kultur', 'Das Monströse']
<|eot_id|> |
3A848418867.jsonld | ['Fiktionales versus faktuales Erzählen fremden Bewusstseins'] | ['"The depiction of another person\'s consciousness is often regarded as the key characteristic of fictional narrative. Is it true, though, that factual narrative avoids presenting alien consciousness? This question is the focus of the present study. Using a computer-assisted diachronic narratological approach, the author analyzes a corpus of five coming-of-age novels and five biographies from the eighteenth to the twentieth centuries."--'] | ['gnd:1110899041', 'gnd:4006804-3', 'gnd:4014965-1', 'gnd:4035964-5', 'gnd:4070948-6', 'gnd:4113292-0', 'gnd:4145190-9', 'gnd:4184506-7', 'gnd:4192723-0', 'gnd:7661868-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848418867'] | ['Lagoni, Frederike', 'Biografie', 'Entwicklungsroman', 'Literatur', 'Erzählperspektive', 'Deutsch', 'Bewusstsein (Motiv)', 'Tatsache', 'Fiktion', 'Fokalisierung'] | Document
### Title: ['Fiktionales versus faktuales Erzählen fremden Bewusstseins']
### Abstract:
['"The depiction of another person\'s consciousness is often regarded as the key characteristic of fictional narrative. Is it true, though, that factual narrative avoids presenting alien consciousness? This question is the focus of the present study. Using a computer-assisted diachronic narratological approach, the author analyzes a corpus of five coming-of-age novels and five biographies from the eighteenth to the twentieth centuries."--']
### GND ID:
['gnd:1110899041', 'gnd:4006804-3', 'gnd:4014965-1', 'gnd:4035964-5', 'gnd:4070948-6', 'gnd:4113292-0', 'gnd:4145190-9', 'gnd:4184506-7', 'gnd:4192723-0', 'gnd:7661868-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848418867']
### GND class:
['Lagoni, Frederike', 'Biografie', 'Entwicklungsroman', 'Literatur', 'Erzählperspektive', 'Deutsch', 'Bewusstsein (Motiv)', 'Tatsache', 'Fiktion', 'Fokalisierung']
<|eot_id|> |
3A848474848.jsonld | ['Genotypic and phenotypic analysis of the spike row-type in barley (Hordeum vulgare L.) : kumulative Dissertation'] | [['Labile; Intermedium barley; lab locus; whole genome mapping; genetic mapping; Vrs1; Int-c; veracode analysis; barley domestications; barley evolution', 'Analyzing the genotypic status of the known row-type loci in different barley collections and combining this data with the phenotypic status allowed us to efficiently explore its genetic diversity of spikelet fertility. The approach applied in this thesis involved an extensive study of the haplotype/phenotype relations in a large number of wild, labile and Intermedium barleys. The overall picture that emerged suggested that besides the known row-type genes, there must be additional genes involved in the control of spikelet fertility. From the results a clear idea arose about the genotypic status of the Vrs1 and Int-c in labile, Intermedium and wild barley collections and the role of these loci in spikelet fertility. Special attention was paid to labile barley, which is considered an intermediate form between two- and six-rowed barley. Investigating labile accessions we managed to map the lab locus on barley chromosome 5HL. Subsequent studies confirmed that lab is controlling floret development and fertility during spike developmental stages. Another remarkable observation was that a group of wild barley ssp. spontaneum genotypically carried the Intermedium haplotype at vrs1 and Int-c loci, yet displayed an Intermedium phenotype with enlarged lateral spikelets but not setting any seeds. These latter plants were named ssp. spontaneum (Intermedium). It was subsequently discovered that the Intermedium barley collection carried the same genotype/haplotype as the ssp. spontaneum “Intermedium” group yet in contrast to the latter showed lateral spikelet fertility, including setting of (small) seeds. This suggests that other additional genes are involved in spikelet fertility in this collection. In conclusion, a new model is introduced on the relation between wild and cultivated barley during domestication based on the re-sequencing of the Vrs1, Vrs4 and Int-c genes. I believe that whole genome studies in such different barley collections will confirm the proposed domestication model presented in this study and that we will thus be able to better understand barley domestication and evolution process.', 'Durch genotypische Untersuchungen mithilfe von bekannten Ährenarchitekturgenen (‘row-type genes‘) in Kombination mit phänotypischen Untersuchungen in verschiedenen Gerstenkollektionen wurden neue Erkenntnisse über die genetische Diversität der Ährchenfertilität gewonnen. Daneben konnten durch das in dieser Studie gezeigte Haplo-/Phänotyp-Verhältnis in den getesteten Wild-, labile- und Intermedium-Kollektionen Hinweise erhalten werden, dass neben den bekannten Ährenarchitekturgenen auch andere Gene eine wesentliche Rolle bei der Ausprägung der Ärchenfertilität spielen. Die Ergebnisse zeigen Korrelationen zwischen dem genotypischen Status der vrs1 und int-c Loci und den phänotypischen Ausprägungen in den verschiedenen Gerstenkollektionen, was neue Erkenntnisse über deren Rolle in der Fertilitätsausprägung lieferte. Neben diesen Loci konnte der lab Lokus auf dem Gerstenchromosom 5H (langer Arm) lokalisiert werden. Des Weiteren konnte gezeigt werden, dass das lab-Gen die Blütchenbildung und -fertilität während der Ährenentwicklung kontrolliert. Ein neues Resultat dieser Studie zeigt, dass eine Gruppe von Wild-Akzessionen (ssp. Spontaneum) genotypisch dem Intermedium Haplotyp an den vrs1 und int-c Loci entspricht und dabei auch den entsprechenden Phänotyp mit vergrößerten seitlichen Ährchen, aber ohne zusätzliche Samenbildung zeigt. Diese Gruppe wird als ssp. spontaneum (Intermedium)“ bezeichnet. In den Intermedium-Akzessionen konnten aber auch Gruppen gefunden werden, die genotypisch spp. spontaneum (Intermedium)“ entsprechen, aber fertile Seitenährchen mit Samenbildung enthalten, woraus hervorgeht, dass zumindest in dieser Kollektion auch andere, unbekannte Gene eine Rolle in der Ährchenfertilität spielen. Auch für die Domestikation von Gerste wurde eine neue Hypothese aus der Re-sequenzierung der Vrs1, Vrs4 und Int-c Gene in Wild- und Kulturakzessionen abgeleitet. Dieses Domestikationsmodell könnte durch genomweite Untersuchungen (GWAS) verifiziert werden. Dieses würde neuartige Einblicke in die Evolution und Domestikationsprozesse der Gerste liefern.', 'labil; Intermedium-Gerste; lab Lokus; Whole Genome Mapping (WGM); genetische Kartierung; Vrs1; int-c; Veracode analysis; Domestikation der Gerste; Evolution der Gerste']] | ['gnd:2024276-1', 'gnd:4123274-4', 'gnd:4150403-3', 'gnd:4259390-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848474848'] | ['Martin-Luther-Universität Halle-Wittenberg', 'Genkartierung', 'Domestikation', 'Gerstenzüchtung'] | Document
### Title: ['Genotypic and phenotypic analysis of the spike row-type in barley (Hordeum vulgare L.) : kumulative Dissertation']
### Abstract:
[['Labile; Intermedium barley; lab locus; whole genome mapping; genetic mapping; Vrs1; Int-c; veracode analysis; barley domestications; barley evolution', 'Analyzing the genotypic status of the known row-type loci in different barley collections and combining this data with the phenotypic status allowed us to efficiently explore its genetic diversity of spikelet fertility. The approach applied in this thesis involved an extensive study of the haplotype/phenotype relations in a large number of wild, labile and Intermedium barleys. The overall picture that emerged suggested that besides the known row-type genes, there must be additional genes involved in the control of spikelet fertility. From the results a clear idea arose about the genotypic status of the Vrs1 and Int-c in labile, Intermedium and wild barley collections and the role of these loci in spikelet fertility. Special attention was paid to labile barley, which is considered an intermediate form between two- and six-rowed barley. Investigating labile accessions we managed to map the lab locus on barley chromosome 5HL. Subsequent studies confirmed that lab is controlling floret development and fertility during spike developmental stages. Another remarkable observation was that a group of wild barley ssp. spontaneum genotypically carried the Intermedium haplotype at vrs1 and Int-c loci, yet displayed an Intermedium phenotype with enlarged lateral spikelets but not setting any seeds. These latter plants were named ssp. spontaneum (Intermedium). It was subsequently discovered that the Intermedium barley collection carried the same genotype/haplotype as the ssp. spontaneum “Intermedium” group yet in contrast to the latter showed lateral spikelet fertility, including setting of (small) seeds. This suggests that other additional genes are involved in spikelet fertility in this collection. In conclusion, a new model is introduced on the relation between wild and cultivated barley during domestication based on the re-sequencing of the Vrs1, Vrs4 and Int-c genes. I believe that whole genome studies in such different barley collections will confirm the proposed domestication model presented in this study and that we will thus be able to better understand barley domestication and evolution process.', 'Durch genotypische Untersuchungen mithilfe von bekannten Ährenarchitekturgenen (‘row-type genes‘) in Kombination mit phänotypischen Untersuchungen in verschiedenen Gerstenkollektionen wurden neue Erkenntnisse über die genetische Diversität der Ährchenfertilität gewonnen. Daneben konnten durch das in dieser Studie gezeigte Haplo-/Phänotyp-Verhältnis in den getesteten Wild-, labile- und Intermedium-Kollektionen Hinweise erhalten werden, dass neben den bekannten Ährenarchitekturgenen auch andere Gene eine wesentliche Rolle bei der Ausprägung der Ärchenfertilität spielen. Die Ergebnisse zeigen Korrelationen zwischen dem genotypischen Status der vrs1 und int-c Loci und den phänotypischen Ausprägungen in den verschiedenen Gerstenkollektionen, was neue Erkenntnisse über deren Rolle in der Fertilitätsausprägung lieferte. Neben diesen Loci konnte der lab Lokus auf dem Gerstenchromosom 5H (langer Arm) lokalisiert werden. Des Weiteren konnte gezeigt werden, dass das lab-Gen die Blütchenbildung und -fertilität während der Ährenentwicklung kontrolliert. Ein neues Resultat dieser Studie zeigt, dass eine Gruppe von Wild-Akzessionen (ssp. Spontaneum) genotypisch dem Intermedium Haplotyp an den vrs1 und int-c Loci entspricht und dabei auch den entsprechenden Phänotyp mit vergrößerten seitlichen Ährchen, aber ohne zusätzliche Samenbildung zeigt. Diese Gruppe wird als ssp. spontaneum (Intermedium)“ bezeichnet. In den Intermedium-Akzessionen konnten aber auch Gruppen gefunden werden, die genotypisch spp. spontaneum (Intermedium)“ entsprechen, aber fertile Seitenährchen mit Samenbildung enthalten, woraus hervorgeht, dass zumindest in dieser Kollektion auch andere, unbekannte Gene eine Rolle in der Ährchenfertilität spielen. Auch für die Domestikation von Gerste wurde eine neue Hypothese aus der Re-sequenzierung der Vrs1, Vrs4 und Int-c Gene in Wild- und Kulturakzessionen abgeleitet. Dieses Domestikationsmodell könnte durch genomweite Untersuchungen (GWAS) verifiziert werden. Dieses würde neuartige Einblicke in die Evolution und Domestikationsprozesse der Gerste liefern.', 'labil; Intermedium-Gerste; lab Lokus; Whole Genome Mapping (WGM); genetische Kartierung; Vrs1; int-c; Veracode analysis; Domestikation der Gerste; Evolution der Gerste']]
### GND ID:
['gnd:2024276-1', 'gnd:4123274-4', 'gnd:4150403-3', 'gnd:4259390-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848474848']
### GND class:
['Martin-Luther-Universität Halle-Wittenberg', 'Genkartierung', 'Domestikation', 'Gerstenzüchtung']
<|eot_id|> |
3A848517148.jsonld | ['Ostrakoden und Foraminiferen aus athalassischen Gewässern und deren Anwendung für die Rekonstruktion quartärer Ökosysteme'] | ['Athalassic waters are characterised by elevated salinity and continental location with full separation from the sea. Faunal assemblages of athalassic waters are individually distinct and characteristic for specific salinity ranges. They are never, however, identical to fully marine assemblages. Athalassic taxa derive from the marginal marine, intertidal zone, where instable ecological conditions require a high adaptability of species. The present thesis identifies, documents and classifies athalassic foraminifer and ostracod associations and applies them for palaeoenvironmental reconstructions. The classification of athalassic waters based on ostracod and foraminifer assemblages needs a specialised methodology because of generally low diversity and high ecological tolerances of typical species, especially towards salinity. Additional methods allow to compensate for this weakness; morphological features as malformations in foraminifer tests as well as noding and sieve pore variability in Cyprideis torosa are applicable for reconstructing salinity changes of the past. Athalassic waters of the low salinity range are characterised by brackish water and tolerant freshwater taxa, dominance of brackish water species, however, is typical for higher salinities. Hypersaline waters are inhabited by a few euryhaline species only, often occurring in very high numbers because of lacking competing species. Some species of marginal marine origin, often associated with salinity-tolerant freshwater species, are typical for athalassic waters, as a generally low diversity as well. If Foraminifera occur, a high proportion of their tests is malformatted. Climatically generated athalassic waters are located in arid climate zones while those with geogenic salinity are typical for humid climate zones because of a high precipitation/evaporation ratio. Hypersaline waters are of climatogenic type and characterised by very low diversity and the exclusive occurrence of euryhaline taxa.'] | ['gnd:1097622517', 'gnd:36164-1', 'gnd:4170777-1', 'gnd:4293663-9', 'gnd:4488988-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848517148'] | ['Pint, Anna', 'Friedrich-Schiller-Universität Jena', 'Muschelkrebse', 'Aquatisches Ökosystem', 'Fossile Foraminiferen'] | Document
### Title: ['Ostrakoden und Foraminiferen aus athalassischen Gewässern und deren Anwendung für die Rekonstruktion quartärer Ökosysteme']
### Abstract:
['Athalassic waters are characterised by elevated salinity and continental location with full separation from the sea. Faunal assemblages of athalassic waters are individually distinct and characteristic for specific salinity ranges. They are never, however, identical to fully marine assemblages. Athalassic taxa derive from the marginal marine, intertidal zone, where instable ecological conditions require a high adaptability of species. The present thesis identifies, documents and classifies athalassic foraminifer and ostracod associations and applies them for palaeoenvironmental reconstructions. The classification of athalassic waters based on ostracod and foraminifer assemblages needs a specialised methodology because of generally low diversity and high ecological tolerances of typical species, especially towards salinity. Additional methods allow to compensate for this weakness; morphological features as malformations in foraminifer tests as well as noding and sieve pore variability in Cyprideis torosa are applicable for reconstructing salinity changes of the past. Athalassic waters of the low salinity range are characterised by brackish water and tolerant freshwater taxa, dominance of brackish water species, however, is typical for higher salinities. Hypersaline waters are inhabited by a few euryhaline species only, often occurring in very high numbers because of lacking competing species. Some species of marginal marine origin, often associated with salinity-tolerant freshwater species, are typical for athalassic waters, as a generally low diversity as well. If Foraminifera occur, a high proportion of their tests is malformatted. Climatically generated athalassic waters are located in arid climate zones while those with geogenic salinity are typical for humid climate zones because of a high precipitation/evaporation ratio. Hypersaline waters are of climatogenic type and characterised by very low diversity and the exclusive occurrence of euryhaline taxa.']
### GND ID:
['gnd:1097622517', 'gnd:36164-1', 'gnd:4170777-1', 'gnd:4293663-9', 'gnd:4488988-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848517148']
### GND class:
['Pint, Anna', 'Friedrich-Schiller-Universität Jena', 'Muschelkrebse', 'Aquatisches Ökosystem', 'Fossile Foraminiferen']
<|eot_id|> |
3A848518462.jsonld | ['Facies and aquifer characterization of the German triassic Buntsandstein in central Germany'] | ['The Lower Triassic Buntsandstein in the Hesse Trough and in the Thuringian Syncline is a major aquifer in Thuringia and adjacent areas. The depositional system is characterized by a playa-lake to lake setting with some aeolian phases in the Lower Buntsandstein and fluvial, sandflat, and lacustrine to aeolian deposits in the Middle Buntsandstein. The aim of the study is to understand the influence of small-scale facies heterogeneities on fluid-flow pathways. For this purpose Lithofacies Types and Associations in outcrops and cores were studied and statistically characterized, with special emphasis on the thickness, depth and width ratios of architectural elements as well as of inclination and orientation of bounding surfaces. To predict aquifer qualities, the spatial distribution and connectivity in relation to variations in petrophysical properties (porosity and permeability) were studied. With the exception of aeolian deposits, especially Facies Associations with poor petrophysical properties have a wide lateral distribution. This indicates that potential barriers, while thin, show a wider lateral continuity than potential aquifers. Based on this dataset small-scale generic 3D-models of different depositional environments were developed, and fluid flow pathways with regard to the sedimentary structures were modelled. Results show that sedimentary structures influence the fluid flow only in the case of high differences in permeability, e.g. in sand layers intercalated in muds. Minor permeability differences within sedimentary units only slow down fluid flow, but do not cause deviations from the flow direction.'] | ['gnd:1095255878', 'gnd:36164-1', 'gnd:4009081-4', 'gnd:4016568-1', 'gnd:4022375-9', 'gnd:4059979-6', 'gnd:4180608-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848518462'] | ['Kunkel, Cindy', 'Friedrich-Schiller-Universität Jena', 'Buntsandstein', 'Fazies', 'Grundwasserleiter', 'Thüringen', 'Sedimentanalyse'] | Document
### Title: ['Facies and aquifer characterization of the German triassic Buntsandstein in central Germany']
### Abstract:
['The Lower Triassic Buntsandstein in the Hesse Trough and in the Thuringian Syncline is a major aquifer in Thuringia and adjacent areas. The depositional system is characterized by a playa-lake to lake setting with some aeolian phases in the Lower Buntsandstein and fluvial, sandflat, and lacustrine to aeolian deposits in the Middle Buntsandstein. The aim of the study is to understand the influence of small-scale facies heterogeneities on fluid-flow pathways. For this purpose Lithofacies Types and Associations in outcrops and cores were studied and statistically characterized, with special emphasis on the thickness, depth and width ratios of architectural elements as well as of inclination and orientation of bounding surfaces. To predict aquifer qualities, the spatial distribution and connectivity in relation to variations in petrophysical properties (porosity and permeability) were studied. With the exception of aeolian deposits, especially Facies Associations with poor petrophysical properties have a wide lateral distribution. This indicates that potential barriers, while thin, show a wider lateral continuity than potential aquifers. Based on this dataset small-scale generic 3D-models of different depositional environments were developed, and fluid flow pathways with regard to the sedimentary structures were modelled. Results show that sedimentary structures influence the fluid flow only in the case of high differences in permeability, e.g. in sand layers intercalated in muds. Minor permeability differences within sedimentary units only slow down fluid flow, but do not cause deviations from the flow direction.']
### GND ID:
['gnd:1095255878', 'gnd:36164-1', 'gnd:4009081-4', 'gnd:4016568-1', 'gnd:4022375-9', 'gnd:4059979-6', 'gnd:4180608-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848518462']
### GND class:
['Kunkel, Cindy', 'Friedrich-Schiller-Universität Jena', 'Buntsandstein', 'Fazies', 'Grundwasserleiter', 'Thüringen', 'Sedimentanalyse']
<|eot_id|> |
3A848519396.jsonld | ['Modeling and inversion of airborne full tensor magnetic gradiometry data in the Thuringian basin and forest'] | ["The recent development of airborne full tensor magnetic gradiometer (FTMG) systems, based on superconducting quantum interference devices (SQUID), allows to obtain the full magnetic gradient tensor of the Earth's magnetic field of large areas (10x10 km). This system allows acquiring all components of the magnetic gradient tensor. This tensor exhibits some advantages over conventional airborne magnetic field data, e.g. a higher spatial resolution and additional directional sensitivity. In this work a FTMG system was applied in the framework of the multidisciplinary INFLUINS project (Integrated fluid dynamics in sedimentary basins) in order investigate different areas in the Thuringian Basin and the neighboring highlands. Main goal was to map magnetic lineaments along major fault zones and to demonstrate the advantages of airborne FTMG. Full tensor data sets have been acquired with very low system noise of only 60 (pT/m). Two different case studies are presented: In the first case study a strong magnetic anomaly in the center of the Thuringian Forest, caused by the magmatic intrusion of the Höhenberger dolerite is analyzed, which exhibits indications of a significant remanent magnetization. Multiple magnetization vector inversions were performed using either the full magnetic gradient tensor or only the total field anomaly data. The inversion results are evaluated using magnetization directions acquired by paleomagnetic sampling and available geological information. In the second case study, a small magnetic anomaly was investigated. It was discovered while mapping magnetic anomalies along the Eichenberg-Gotha-Saalfeld fault zone, which is one of the major fault zones in the Thuringian Basin. The detected lineament is interpreted using the components of the magnetic gradient tensor, additional ground based geo-electrical data and available geological information. The inversion of the magnetic gradients revealed a steeply dipping zone of mostly induced magnetization."] | ['gnd:1095255525', 'gnd:36164-1', 'gnd:4059985-1', 'gnd:4074450-4', 'gnd:4728874-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848519396'] | ['Queitsch, Matthias', 'Friedrich-Schiller-Universität Jena', 'Thüringer Wald', 'Magnetfeld', 'Gradiometer'] | Document
### Title: ['Modeling and inversion of airborne full tensor magnetic gradiometry data in the Thuringian basin and forest']
### Abstract:
["The recent development of airborne full tensor magnetic gradiometer (FTMG) systems, based on superconducting quantum interference devices (SQUID), allows to obtain the full magnetic gradient tensor of the Earth's magnetic field of large areas (10x10 km). This system allows acquiring all components of the magnetic gradient tensor. This tensor exhibits some advantages over conventional airborne magnetic field data, e.g. a higher spatial resolution and additional directional sensitivity. In this work a FTMG system was applied in the framework of the multidisciplinary INFLUINS project (Integrated fluid dynamics in sedimentary basins) in order investigate different areas in the Thuringian Basin and the neighboring highlands. Main goal was to map magnetic lineaments along major fault zones and to demonstrate the advantages of airborne FTMG. Full tensor data sets have been acquired with very low system noise of only 60 (pT/m). Two different case studies are presented: In the first case study a strong magnetic anomaly in the center of the Thuringian Forest, caused by the magmatic intrusion of the Höhenberger dolerite is analyzed, which exhibits indications of a significant remanent magnetization. Multiple magnetization vector inversions were performed using either the full magnetic gradient tensor or only the total field anomaly data. The inversion results are evaluated using magnetization directions acquired by paleomagnetic sampling and available geological information. In the second case study, a small magnetic anomaly was investigated. It was discovered while mapping magnetic anomalies along the Eichenberg-Gotha-Saalfeld fault zone, which is one of the major fault zones in the Thuringian Basin. The detected lineament is interpreted using the components of the magnetic gradient tensor, additional ground based geo-electrical data and available geological information. The inversion of the magnetic gradients revealed a steeply dipping zone of mostly induced magnetization."]
### GND ID:
['gnd:1095255525', 'gnd:36164-1', 'gnd:4059985-1', 'gnd:4074450-4', 'gnd:4728874-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848519396']
### GND class:
['Queitsch, Matthias', 'Friedrich-Schiller-Universität Jena', 'Thüringer Wald', 'Magnetfeld', 'Gradiometer']
<|eot_id|> |
3A84878667X.jsonld | ['Deformation Tracking in Depth and Color Video : an Analysis by Synthesis Approach'] | ['The tracking of deforming objects and the reconstruction of deformation in image sequences is one of the current research areas in computer vision. In contrast to rigid scenes, which can be analyzed and reconstructed very well, general deformations come with an infinite number of sub-movements and ways to parametrize them, which makes it very difficult to formulate discrete tracking goals. In contrast to the classic reconstructions based on color data alone, the combination of depth and color video provides tracking algorithms with a data foundation with less room for ambiguities, but also requires new algorithmic approaches to handle different entities and to exploit the available data. This thesis discusses an Analysis by Synthesis (AbS) scheme as an approach to the deformation tracking problem, a method that differs in many key aspects from common reconstruction schemes. It is demonstrated that AbS based deformation reconstruction can reconstruct complex deformations, deal with occlusions and self-occlusions, and can also be used for real-time tracking.'] | ['gnd:1015521614', 'gnd:2024175-6', 'gnd:4078895-7', 'gnd:4311226-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84878667X'] | ['Koch, Reinhard', 'Christian-Albrechts-Universität zu Kiel', 'Video', 'Objektverfolgung'] | Document
### Title: ['Deformation Tracking in Depth and Color Video : an Analysis by Synthesis Approach']
### Abstract:
['The tracking of deforming objects and the reconstruction of deformation in image sequences is one of the current research areas in computer vision. In contrast to rigid scenes, which can be analyzed and reconstructed very well, general deformations come with an infinite number of sub-movements and ways to parametrize them, which makes it very difficult to formulate discrete tracking goals. In contrast to the classic reconstructions based on color data alone, the combination of depth and color video provides tracking algorithms with a data foundation with less room for ambiguities, but also requires new algorithmic approaches to handle different entities and to exploit the available data. This thesis discusses an Analysis by Synthesis (AbS) scheme as an approach to the deformation tracking problem, a method that differs in many key aspects from common reconstruction schemes. It is demonstrated that AbS based deformation reconstruction can reconstruct complex deformations, deal with occlusions and self-occlusions, and can also be used for real-time tracking.']
### GND ID:
['gnd:1015521614', 'gnd:2024175-6', 'gnd:4078895-7', 'gnd:4311226-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84878667X']
### GND class:
['Koch, Reinhard', 'Christian-Albrechts-Universität zu Kiel', 'Video', 'Objektverfolgung']
<|eot_id|> |
3A848792165.jsonld | ['Performance of current models of speech recognition and resulting challenges'] | [['Speech is usually perceived in background noise (masker) that can severely hamper its recognition. Nevertheless, there are mechanisms that enable speech recognition even in difficult listening conditions. Some of them, such as e.g., the combination of across-frequency information or binaural cues, are studied in this dissertation. Moreover, masking aspects such as energetic, amplitude modulation or informational masking are considered. Speech recognition in complex maskers is investigated that systematically vary in their spectro-temporal properties and address all aspects listed above. Outcomes of current models of speech recognition are compared to the data observed in the listening experiments. This allows to assess how well the different models account for the observed speech reception thresholds, as each model incorporates different signal analysis strategies. The studies designate the limits of the current model approaches, and thus constitute a benchmark for speech recognition models which might be useful for improving our current state of the art in modelling speech recognition. <engl.>', 'Sprache wird oft durch Störgeräusche (Maskierer) verdeckt, die das Verstehen eines Zielsprechers erheblich behindern können. Aber es gibt Mechanismen, die Sprachverstehen in schwierigen Hörsituationen ermöglichen. Einige davon, z.B. die frequenzübergreifende Kombination von Information oder binaurale Merkmale, werden in dieser Dissertation untersucht. Außerdem werden Maskiereigenschaften wie energetische Maskierung, Amplitudenmodulationsmaskierung und „informational masking“ diskutiert. Sprachverständlichkeit wird in komplexen Maskierern untersucht, die systematisch ihre spektro-temporalen Merkmale ändern und dabei die verschiedenen Aspekte ansprechen. Gemessene Sprachverständlichkeitsschwellen werden mit den Vorhersagen verschiedener Sprachverständlichkeitsmodelle verglichen. Da jedes Modell eine andere Analysestrategie der dargebotenen Signale hat, kann beurteilt werden, wie gut die einzelnen Modelle die gemessene Sprachverständlichkeit vorhersagen. Diese Dissertation benennt die Grenzen aktueller Modelle und bietet so eine „benchmark“ für die Weiterentwicklung von Sprachverständlichkeitsmodellen. <dt.>']] | ['gnd:4077745-5', 'gnd:4170297-9', 'gnd:4343358-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848792165'] | ['Sprachwahrnehmung', 'Modellierung', 'Störgeräusch'] | Document
### Title: ['Performance of current models of speech recognition and resulting challenges']
### Abstract:
[['Speech is usually perceived in background noise (masker) that can severely hamper its recognition. Nevertheless, there are mechanisms that enable speech recognition even in difficult listening conditions. Some of them, such as e.g., the combination of across-frequency information or binaural cues, are studied in this dissertation. Moreover, masking aspects such as energetic, amplitude modulation or informational masking are considered. Speech recognition in complex maskers is investigated that systematically vary in their spectro-temporal properties and address all aspects listed above. Outcomes of current models of speech recognition are compared to the data observed in the listening experiments. This allows to assess how well the different models account for the observed speech reception thresholds, as each model incorporates different signal analysis strategies. The studies designate the limits of the current model approaches, and thus constitute a benchmark for speech recognition models which might be useful for improving our current state of the art in modelling speech recognition. <engl.>', 'Sprache wird oft durch Störgeräusche (Maskierer) verdeckt, die das Verstehen eines Zielsprechers erheblich behindern können. Aber es gibt Mechanismen, die Sprachverstehen in schwierigen Hörsituationen ermöglichen. Einige davon, z.B. die frequenzübergreifende Kombination von Information oder binaurale Merkmale, werden in dieser Dissertation untersucht. Außerdem werden Maskiereigenschaften wie energetische Maskierung, Amplitudenmodulationsmaskierung und „informational masking“ diskutiert. Sprachverständlichkeit wird in komplexen Maskierern untersucht, die systematisch ihre spektro-temporalen Merkmale ändern und dabei die verschiedenen Aspekte ansprechen. Gemessene Sprachverständlichkeitsschwellen werden mit den Vorhersagen verschiedener Sprachverständlichkeitsmodelle verglichen. Da jedes Modell eine andere Analysestrategie der dargebotenen Signale hat, kann beurteilt werden, wie gut die einzelnen Modelle die gemessene Sprachverständlichkeit vorhersagen. Diese Dissertation benennt die Grenzen aktueller Modelle und bietet so eine „benchmark“ für die Weiterentwicklung von Sprachverständlichkeitsmodellen. <dt.>']]
### GND ID:
['gnd:4077745-5', 'gnd:4170297-9', 'gnd:4343358-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848792165']
### GND class:
['Sprachwahrnehmung', 'Modellierung', 'Störgeräusch']
<|eot_id|> |
3A848795377.jsonld | ['Essays on the interaction of investor clienteles and mutual fund behavior'] | ["This thesis consists of three essays on the interaction of investor clienteles and mutual fund behavior. The first essay (Cici, Kempf, and Sorhage 2015, Do Financial Advisors Provide Tangible Benefits for Investors? Evidence from Tax-Motivated Mutual Fund Flowsʺ) adds to the literature on fund investor clienteles by addressing the question for potential benefits accruing to investors who rely on financial advisors when acquiring shares in a fund. The second essay (Sorhage, 2015, Outsourcing of Mutual Funds' Non-core Competenciesʺ) investigates the relation between mutual fund behavior and fund families' decisions to source fund activities unrelated to portfolio management internally or from external providers. The third essay (Dahm and Sorhage, 2015, Milk or Wine: Mutual Funds' (Dis)economies of Life) adds to the literature on time-varying fund behavior and is related to the previous two essays by examining whether funds' investment skills change to the positive or negative over time and how this is interrelated to investor groups."] | ['gnd:1084147777', 'gnd:4029578-3', 'gnd:4049459-7', 'gnd:4078704-7', 'gnd:4114047-3', 'gnd:4214003-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848795377'] | ['Sorhage, Christoph', 'Kapitalmarkt', 'Rendite', 'USA', 'Investmentfonds', 'Anlageverhalten'] | Document
### Title: ['Essays on the interaction of investor clienteles and mutual fund behavior']
### Abstract:
["This thesis consists of three essays on the interaction of investor clienteles and mutual fund behavior. The first essay (Cici, Kempf, and Sorhage 2015, Do Financial Advisors Provide Tangible Benefits for Investors? Evidence from Tax-Motivated Mutual Fund Flowsʺ) adds to the literature on fund investor clienteles by addressing the question for potential benefits accruing to investors who rely on financial advisors when acquiring shares in a fund. The second essay (Sorhage, 2015, Outsourcing of Mutual Funds' Non-core Competenciesʺ) investigates the relation between mutual fund behavior and fund families' decisions to source fund activities unrelated to portfolio management internally or from external providers. The third essay (Dahm and Sorhage, 2015, Milk or Wine: Mutual Funds' (Dis)economies of Life) adds to the literature on time-varying fund behavior and is related to the previous two essays by examining whether funds' investment skills change to the positive or negative over time and how this is interrelated to investor groups."]
### GND ID:
['gnd:1084147777', 'gnd:4029578-3', 'gnd:4049459-7', 'gnd:4078704-7', 'gnd:4114047-3', 'gnd:4214003-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848795377']
### GND class:
['Sorhage, Christoph', 'Kapitalmarkt', 'Rendite', 'USA', 'Investmentfonds', 'Anlageverhalten']
<|eot_id|> |
3A848795482.jsonld | ['Molekularer Wärmetransport einzelner Moleküle'] | [['In this work, the heat transfer through single molecules and via the coupling of the thermal near fields between a sample and a probe are experimentally investigated. The measurements are performed under ultrahigh vacuum conditions by means of Near-Field Scanning Thermal Microscope (NSThM), which bases on a commercial scanning tunneling microscope. The probe of the NSThM is augmented by a submicron thermocouple. Its unique structure enables contacting of individual Oktandithiol (ODT) molecules, and thus the determination of an upper limit for the thermal conductivity of an ODT of 53 pW/K. Furthermore, the resulting near-field heat flux between sample and probe is varied by the use of phase transition materials as a sample. However, this effect is dominated by the impact of a residual gas condensation layer on the sample surface. Its influence increases the measured near-field heat flux by a factor of 20, and thus exceeds the values reported in the literature by one order of magnitude. <engl.>', 'In dieser Arbeit wird experimentell der Wärmeübertrag durch einzelne Moleküle sowie durch die Kopplung der thermischen Nahfelder zwischen Probe und Sonde untersucht. Dafür werden Messungen im Ultrahochvakuum mit dem Near-Field-Scanning-Thermal-Microscope (NSThM) durchgeführt, welches auf einem kommerziellen Rastertunnelmikroskop mit einer um ein Mikro-Thermoelement erweiterten Sonde beruht. Dessen einzigartiger Aufbau ermöglicht das Kontaktieren einzelner Oktandithiol (ODT)-Moleküle und damit die Bestimmung einer oberen Schranke für die thermische Leitfähigkeit eines ODT von 53 pW/K. Des Weiteren wird durch die Verwendung von Phasenübergangsmaterialien als Probe gezielt der Nahfeldwärmeübertrag zwischen Probe und Sonde variiert. Diese Änderung wird jedoch von dem Einfluss einer Restgaskondensationsschicht auf der Kristalloberfläche dominiert, welche den Nahfeldwärmeübertrag um einen Faktor 20 erhöht und damit alle diesbezüglich veröffentlichten Werte um eine Größenordnung übersteigt. <dt.>']] | ['gnd:4064191-0', 'gnd:4312216-4', 'gnd:4489205-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848795482'] | ['Wärmeleitfähigkeit', 'Nahfeld', 'Freies Molekül'] | Document
### Title: ['Molekularer Wärmetransport einzelner Moleküle']
### Abstract:
[['In this work, the heat transfer through single molecules and via the coupling of the thermal near fields between a sample and a probe are experimentally investigated. The measurements are performed under ultrahigh vacuum conditions by means of Near-Field Scanning Thermal Microscope (NSThM), which bases on a commercial scanning tunneling microscope. The probe of the NSThM is augmented by a submicron thermocouple. Its unique structure enables contacting of individual Oktandithiol (ODT) molecules, and thus the determination of an upper limit for the thermal conductivity of an ODT of 53 pW/K. Furthermore, the resulting near-field heat flux between sample and probe is varied by the use of phase transition materials as a sample. However, this effect is dominated by the impact of a residual gas condensation layer on the sample surface. Its influence increases the measured near-field heat flux by a factor of 20, and thus exceeds the values reported in the literature by one order of magnitude. <engl.>', 'In dieser Arbeit wird experimentell der Wärmeübertrag durch einzelne Moleküle sowie durch die Kopplung der thermischen Nahfelder zwischen Probe und Sonde untersucht. Dafür werden Messungen im Ultrahochvakuum mit dem Near-Field-Scanning-Thermal-Microscope (NSThM) durchgeführt, welches auf einem kommerziellen Rastertunnelmikroskop mit einer um ein Mikro-Thermoelement erweiterten Sonde beruht. Dessen einzigartiger Aufbau ermöglicht das Kontaktieren einzelner Oktandithiol (ODT)-Moleküle und damit die Bestimmung einer oberen Schranke für die thermische Leitfähigkeit eines ODT von 53 pW/K. Des Weiteren wird durch die Verwendung von Phasenübergangsmaterialien als Probe gezielt der Nahfeldwärmeübertrag zwischen Probe und Sonde variiert. Diese Änderung wird jedoch von dem Einfluss einer Restgaskondensationsschicht auf der Kristalloberfläche dominiert, welche den Nahfeldwärmeübertrag um einen Faktor 20 erhöht und damit alle diesbezüglich veröffentlichten Werte um eine Größenordnung übersteigt. <dt.>']]
### GND ID:
['gnd:4064191-0', 'gnd:4312216-4', 'gnd:4489205-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848795482']
### GND class:
['Wärmeleitfähigkeit', 'Nahfeld', 'Freies Molekül']
<|eot_id|> |
3A848843312.jsonld | ['Temporal interpretation and cross-linguistic variation : a formal semantic analysis of temporal and aspectual reference in Hausa and Medumba'] | ['This thesis investigates temporal and aspectual reference in the typologically unrelated African languages Hausa (Chadic, Afro–Asiatic) and Medumba (Grassfields Bantu). It argues that Hausa is a genuinely tenseless language and compares the interpretation of temporally unmarked sentences in Hausa to that of morphologically tenseless sentences in Medumba, where tense marking is optional and graded. The empirical behavior of the optional temporal morphemes in Medumba motivates an analysis as existential quantifiers over times and thus provides new evidence suggesting that languages vary in whether their (past) tense is pronominal or quantificational (see also Sharvit 2014). The thesis proposes for both Hausa and Medumba that the alleged future tense marker is a modal element that obligatorily combines with a prospective future shifter (which is covert in Medumba). Cross-linguistic variation in whether or not a future marker is compatible with non-future interpretation is proposed to be predictable from the aspectual architecture o…'] | ['gnd:1085184765', 'gnd:4059446-4', 'gnd:4120193-0', 'gnd:4780308-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848843312'] | ['Mucha, Anne', 'Tempus', 'Hausa-Sprache', 'Bangangte-Sprache'] | Document
### Title: ['Temporal interpretation and cross-linguistic variation : a formal semantic analysis of temporal and aspectual reference in Hausa and Medumba']
### Abstract:
['This thesis investigates temporal and aspectual reference in the typologically unrelated African languages Hausa (Chadic, Afro–Asiatic) and Medumba (Grassfields Bantu). It argues that Hausa is a genuinely tenseless language and compares the interpretation of temporally unmarked sentences in Hausa to that of morphologically tenseless sentences in Medumba, where tense marking is optional and graded. The empirical behavior of the optional temporal morphemes in Medumba motivates an analysis as existential quantifiers over times and thus provides new evidence suggesting that languages vary in whether their (past) tense is pronominal or quantificational (see also Sharvit 2014). The thesis proposes for both Hausa and Medumba that the alleged future tense marker is a modal element that obligatorily combines with a prospective future shifter (which is covert in Medumba). Cross-linguistic variation in whether or not a future marker is compatible with non-future interpretation is proposed to be predictable from the aspectual architecture o…']
### GND ID:
['gnd:1085184765', 'gnd:4059446-4', 'gnd:4120193-0', 'gnd:4780308-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A848843312']
### GND class:
['Mucha, Anne', 'Tempus', 'Hausa-Sprache', 'Bangangte-Sprache']
<|eot_id|> |
3A849478332.jsonld | ['Betriebsfestigkeit von Dünnblech-Montagestößen mit werftüblichen Imperfektionen im Schiffbau'] | [['During the construction of thin plated block joints, axial and angular misalignments occur, which lead to additional stresses at this special structural detail. This results potentially in a not proven fatigue strength. Within the thesis, a concept for the assessment of geometric imperfections, which may occur at the block joint, is developed. For typical thin-plated specimen, imperfections are recorded and statistically analyzed. Component tests with typical boundary conditions for full scale structures are carried out to determine the fatigue strength behaviour of the butt joint. With the results of measurements and tests, tolerances with regard to fatigue strength are derived and a recommendation for the measurement and evaluation of imperfections of thin-plated block joints is developed.$cen$dAbstract', 'Bei der Fertigung von Dünnblech-Montagestößen treten Fertigungsimperfektionen in Form von Kantenversatz und Nahteinfall auf, welche im Betrieb des Schiffes zu Spannungserhöhungen an diesem Strukturdetail führen. So kann der rechnerische Nachweis der Betriebsfestigkeit hier ggf. nicht erbracht werden. Die Arbeit befasst sich mit der Entwicklung eines Bewertungskonzeptes für geometrische Imperfektionen, wie sie am Montagestoß auftreten können. Anhand schiffbautypischer Modelle in Dünnblechbauweise werden Imperfektionen am Montagestoß gemessen und statistisch ausgewertet. In Bauteilversuchen mit für Großstrukturen typischen Randbedingungen erfolgt die Ermittlung der Rissempfindlichkeit dieses Stumpfstoßes. Auf Basis der Mess- und Versuchsergebnisse werden Toleranzvorgaben mit Bezug zur Betriebsfestigkeit hergeleitet und es wird eine entsprechende Empfehlung für die Messung und Auswertung für Imperfektionen an Dünnblech-Montagestößen entwickelt.$cde$dAbstract']] | ['gnd:10194333-7', 'gnd:104759157X', 'gnd:1120044502', 'gnd:1167357744', 'gnd:4006178-4', 'gnd:4052397-4', 'gnd:4060356-8', 'gnd:4129474-9', 'gnd:4131375-6', 'gnd:4236208-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A849478332'] | ['Technische Universität Hamburg-Harburg, Institut für Konstruktion und Festigkeit von Schiffen', 'Fricke, Wolfgang', 'Eggert, Lars', 'Emmelmann, Claus', 'Betriebsfestigkeit', 'Schiffbau', 'Toleranz (Technik)', 'Feinblech', 'Stoß (Technik)', 'Spannungsverteilung'] | Document
### Title: ['Betriebsfestigkeit von Dünnblech-Montagestößen mit werftüblichen Imperfektionen im Schiffbau']
### Abstract:
[['During the construction of thin plated block joints, axial and angular misalignments occur, which lead to additional stresses at this special structural detail. This results potentially in a not proven fatigue strength. Within the thesis, a concept for the assessment of geometric imperfections, which may occur at the block joint, is developed. For typical thin-plated specimen, imperfections are recorded and statistically analyzed. Component tests with typical boundary conditions for full scale structures are carried out to determine the fatigue strength behaviour of the butt joint. With the results of measurements and tests, tolerances with regard to fatigue strength are derived and a recommendation for the measurement and evaluation of imperfections of thin-plated block joints is developed.$cen$dAbstract', 'Bei der Fertigung von Dünnblech-Montagestößen treten Fertigungsimperfektionen in Form von Kantenversatz und Nahteinfall auf, welche im Betrieb des Schiffes zu Spannungserhöhungen an diesem Strukturdetail führen. So kann der rechnerische Nachweis der Betriebsfestigkeit hier ggf. nicht erbracht werden. Die Arbeit befasst sich mit der Entwicklung eines Bewertungskonzeptes für geometrische Imperfektionen, wie sie am Montagestoß auftreten können. Anhand schiffbautypischer Modelle in Dünnblechbauweise werden Imperfektionen am Montagestoß gemessen und statistisch ausgewertet. In Bauteilversuchen mit für Großstrukturen typischen Randbedingungen erfolgt die Ermittlung der Rissempfindlichkeit dieses Stumpfstoßes. Auf Basis der Mess- und Versuchsergebnisse werden Toleranzvorgaben mit Bezug zur Betriebsfestigkeit hergeleitet und es wird eine entsprechende Empfehlung für die Messung und Auswertung für Imperfektionen an Dünnblech-Montagestößen entwickelt.$cde$dAbstract']]
### GND ID:
['gnd:10194333-7', 'gnd:104759157X', 'gnd:1120044502', 'gnd:1167357744', 'gnd:4006178-4', 'gnd:4052397-4', 'gnd:4060356-8', 'gnd:4129474-9', 'gnd:4131375-6', 'gnd:4236208-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A849478332']
### GND class:
['Technische Universität Hamburg-Harburg, Institut für Konstruktion und Festigkeit von Schiffen', 'Fricke, Wolfgang', 'Eggert, Lars', 'Emmelmann, Claus', 'Betriebsfestigkeit', 'Schiffbau', 'Toleranz (Technik)', 'Feinblech', 'Stoß (Technik)', 'Spannungsverteilung']
<|eot_id|> |
3A84970345X.jsonld | ['Nonlinear pseudospin dynamics of exciton-polaritons in semiconductor microcavity'] | ['Semiconductor microcavities offer the possibility to enhance the interaction between cavity photons and elementary excitations of the semiconductor. The excitations considered here are excitons, bound states of electrons and holes. The coherent interaction between these excitons and photons leads to the formation of quasiparticles called exciton-polaritons. The respective interaction regime is termed strong coupling regime. Exciton-polaritons inherit properties from both their photonic and their electronic component. A typical property inherited from the excitons is the spin. The scope of this thesis is twofold. On the one hand, the general properties of exciton-polaritons are studied theoretically. On the other hand, the influence of the exciton spin is analyzed. Several effects and tools known from nonlinear dynamics such as pattern formation, cavity solitons, domain walls, perturbation theory, and bifurcation theory are used in order to highlight these properties. The findings of this thesis expand the knowledge about the theoretical foundations of polariton physics. This may pave the way to potential application of semiconductor microcavities as all-optical information processing and storage devices.'] | ['gnd:1096240807', 'gnd:36164-1', 'gnd:4174992-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84970345X'] | ['Werner, Friedemann Albrecht', 'Friedrich-Schiller-Universität Jena', 'Polariton'] | Document
### Title: ['Nonlinear pseudospin dynamics of exciton-polaritons in semiconductor microcavity']
### Abstract:
['Semiconductor microcavities offer the possibility to enhance the interaction between cavity photons and elementary excitations of the semiconductor. The excitations considered here are excitons, bound states of electrons and holes. The coherent interaction between these excitons and photons leads to the formation of quasiparticles called exciton-polaritons. The respective interaction regime is termed strong coupling regime. Exciton-polaritons inherit properties from both their photonic and their electronic component. A typical property inherited from the excitons is the spin. The scope of this thesis is twofold. On the one hand, the general properties of exciton-polaritons are studied theoretically. On the other hand, the influence of the exciton spin is analyzed. Several effects and tools known from nonlinear dynamics such as pattern formation, cavity solitons, domain walls, perturbation theory, and bifurcation theory are used in order to highlight these properties. The findings of this thesis expand the knowledge about the theoretical foundations of polariton physics. This may pave the way to potential application of semiconductor microcavities as all-optical information processing and storage devices.']
### GND ID:
['gnd:1096240807', 'gnd:36164-1', 'gnd:4174992-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A84970345X']
### GND class:
['Werner, Friedemann Albrecht', 'Friedrich-Schiller-Universität Jena', 'Polariton']
<|eot_id|> |
3A850617685.jsonld | ['Lineare Koordinationspolymere aus Metall-Cyclam-Komplex-Baueinheiten : Synthesestrategien und Strukturen'] | ['Aza-Komplexe, eindimensionale Koordinationspolymere, Cyclam, Dicarboxylate, Einkristallzucht, Tetraazamakrocyclen. - Aza complexes, one-dimensional coordination polymers, dicarboxylates, single crystal growth, tetraazamacrocyles'] | ['gnd:131454617', 'gnd:173935540', 'gnd:4137334-0', 'gnd:4175101-2', 'gnd:4467757-1', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A850617685'] | ['Renz, Franz', 'Behrens, Peter', 'Polymerkomplexe', 'Polyamine', 'Tetraazacyclotetradecanderivate', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Lineare Koordinationspolymere aus Metall-Cyclam-Komplex-Baueinheiten : Synthesestrategien und Strukturen']
### Abstract:
['Aza-Komplexe, eindimensionale Koordinationspolymere, Cyclam, Dicarboxylate, Einkristallzucht, Tetraazamakrocyclen. - Aza complexes, one-dimensional coordination polymers, dicarboxylates, single crystal growth, tetraazamacrocyles']
### GND ID:
['gnd:131454617', 'gnd:173935540', 'gnd:4137334-0', 'gnd:4175101-2', 'gnd:4467757-1', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A850617685']
### GND class:
['Renz, Franz', 'Behrens, Peter', 'Polymerkomplexe', 'Polyamine', 'Tetraazacyclotetradecanderivate', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A850939615.jsonld | ['Towards surface-enlarged diamond materials : creation of surface-enlarged diamond electrodes for electrochemical energy applications'] | [['Zusammenfassung: Driven by the demand for energy generation and storage systems in portable devices, electrical vehicles and renewable energy for power grids, the past decades have seen a tremendous amount of research on the topic of energy storage and conversion. Devices such as supercapacitors and fuel cells have been intensively investigated. Since energy is either con-verted or stored at the electrolyte-electrode interface, an important issue for these electrochemical power sources is to enlarge the effective surface area of the working electrode. For this purpose, sp2 carbon based materials, especially activated carbon, have been widely used in both scientific researches and commercially available products. For this kind of materials, two aspects may be improved. One is the small working potential window in aqueous solutions (~ 1 V), which limits the energy storage. Another is the low stability, especially towards oxidation. Boron-doped diamond is an electrode material with extreme stability and a wide window of usable potentials even in aqueous solutions. Together with other unrivaled physical and chemical properties, diamond has attracted extensive electrochemical research since 1990s. However, the typical planar diamond electrode has a low surface area, which limits its applicability for energy-conversion and -storage. There has been successful scientific development of nanostructured diamond with enhanced surface areas, but the state-of-the-art technology remains limited regarding the achievable surface enhancement factor. The fabrication of nanostructured boron-doped diamond almost solely depends on reactive ion etching. This method generates vertical structures with a limited aspect ratio and therefore a maximum achievable surface enhancement factor in the range of 10 – 50, which is insufficient for energy applications. The electrochemical applications of these nanostructured electrodes remain limited to electrochemical sensing. Their application in energy related topics has rarely been reported. This thesis introduces an alternative and scalable bottom-up approach for the fabrication of surface-enlarged diamond electrodes, which is capable of producing significantly higher surface enhancements. The potential of these electrodes is investigated in two exemplary energy applications, which profit from the achieved surface enhancement. This thesis begins with state-of-the-art diamond nanostructuring techniques, i.e. plasma assisted reactive ion e ...', 'Zusammenfassung: Aufgrund des immer dringenderen Bedarfs an Energiespeicher- und Energiewandlungssystemen für mobile Elektronik, für Elektrofahrzeuge und für die Stromnetze hat die Forschung an Speicherung und -wandlung von Energie in den letzten Jahrzenten enorm an Bedeutung gewonnen. Systeme wie Superkondensatoren und Brennstoffzellen wurden intensiv erforscht. Derartige Technologien beruhen auf Energiespeicherung/-wandlung an einer Grenzfläche zwischen einer Elektrode und einem Elektrolyten. Aus diesem Grund ist die Erhöhung der Elektrodenoberfläche ein Primärziel dieser Forschung. Hierbei sind sp2 kohlenstoffbasierte Materialien dominierend, allen voran Aktivkohle, sowohl in der Forschung als auch in kommerziellen Produkten. Für diese Materialklasse besteht jedoch in zwei wesentlichen Punkten Bedarf für Verbesserung. Zum einen wird die pro Oberflächeneinheit speicherbare Energie durch das enge nutzbare Spannungsfenster in wässrigen Elektrolyten (~ 1 V) begrenzt. Zum anderen ist Aktivkohle, besonders unter oxidativen Bedingungen, anfällig für Korrosion.Bordotierter Diamant hat im Gegensatz dazu ein breites Spannungsfenster, auch in wässrigen Elektrolyten, und ist extrem korrosionsstabil. Von allen bekannten Elektrodenmaterialien hebt sich leitfähiger Diamant seit den 1990er Jahren besonders wegen seiner unerreichten physikalischen und chemischen Eigenschaften ab. Die typische planare Diamantelektrode hat jedoch eine begrenzte Oberfläche, was deren Anwendung in Energiesystemen entgegen steht. Es wurden zwar bereits nanostrukturierte Diamantelektroden entwickelt, diese bleiben aber in der erreichbaren Oberflächenvergrößerung beschränkt. Deren Herstellung beruht auf Plasmaätzen, welches vertikale Strukturen erzeugt. Das maximale Seitenverhältnis dieser Strukturen ist technologisch limitiert, was die erreichbare Oberflächenvergrößerung auf den Faktor 10 – 50 begrenzt, ein Wert der für elektrochemische Energiesysteme unzureichend ist. Elektrochemische Anwendungen dieser Elektroden bleiben daher auf Sensoranwendungen beschränkt. Diese Arbeit stellt einen alternativen und skalierbaren Ansatz zur Herstellung von Diamantelektroden vor, der in der Lage ist eine signifikant höhere Oberflächenvergrößerung zu erreichen. Die damit hergestellten Elektroden wurden auf ihr Potential in zwei Beispielanwendungen aus den Bereichen Energiespeicherung und Energiewandlung untersucht, die direkt von einer vergröße ...']] | ['gnd:1082793361', 'gnd:4012069-7', 'gnd:4014247-4', 'gnd:4152230-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A850939615'] | ['Gao, Fang', 'Diamant', 'Elektrode', 'Energiespeicher'] | Document
### Title: ['Towards surface-enlarged diamond materials : creation of surface-enlarged diamond electrodes for electrochemical energy applications']
### Abstract:
[['Zusammenfassung: Driven by the demand for energy generation and storage systems in portable devices, electrical vehicles and renewable energy for power grids, the past decades have seen a tremendous amount of research on the topic of energy storage and conversion. Devices such as supercapacitors and fuel cells have been intensively investigated. Since energy is either con-verted or stored at the electrolyte-electrode interface, an important issue for these electrochemical power sources is to enlarge the effective surface area of the working electrode. For this purpose, sp2 carbon based materials, especially activated carbon, have been widely used in both scientific researches and commercially available products. For this kind of materials, two aspects may be improved. One is the small working potential window in aqueous solutions (~ 1 V), which limits the energy storage. Another is the low stability, especially towards oxidation. Boron-doped diamond is an electrode material with extreme stability and a wide window of usable potentials even in aqueous solutions. Together with other unrivaled physical and chemical properties, diamond has attracted extensive electrochemical research since 1990s. However, the typical planar diamond electrode has a low surface area, which limits its applicability for energy-conversion and -storage. There has been successful scientific development of nanostructured diamond with enhanced surface areas, but the state-of-the-art technology remains limited regarding the achievable surface enhancement factor. The fabrication of nanostructured boron-doped diamond almost solely depends on reactive ion etching. This method generates vertical structures with a limited aspect ratio and therefore a maximum achievable surface enhancement factor in the range of 10 – 50, which is insufficient for energy applications. The electrochemical applications of these nanostructured electrodes remain limited to electrochemical sensing. Their application in energy related topics has rarely been reported. This thesis introduces an alternative and scalable bottom-up approach for the fabrication of surface-enlarged diamond electrodes, which is capable of producing significantly higher surface enhancements. The potential of these electrodes is investigated in two exemplary energy applications, which profit from the achieved surface enhancement. This thesis begins with state-of-the-art diamond nanostructuring techniques, i.e. plasma assisted reactive ion e ...', 'Zusammenfassung: Aufgrund des immer dringenderen Bedarfs an Energiespeicher- und Energiewandlungssystemen für mobile Elektronik, für Elektrofahrzeuge und für die Stromnetze hat die Forschung an Speicherung und -wandlung von Energie in den letzten Jahrzenten enorm an Bedeutung gewonnen. Systeme wie Superkondensatoren und Brennstoffzellen wurden intensiv erforscht. Derartige Technologien beruhen auf Energiespeicherung/-wandlung an einer Grenzfläche zwischen einer Elektrode und einem Elektrolyten. Aus diesem Grund ist die Erhöhung der Elektrodenoberfläche ein Primärziel dieser Forschung. Hierbei sind sp2 kohlenstoffbasierte Materialien dominierend, allen voran Aktivkohle, sowohl in der Forschung als auch in kommerziellen Produkten. Für diese Materialklasse besteht jedoch in zwei wesentlichen Punkten Bedarf für Verbesserung. Zum einen wird die pro Oberflächeneinheit speicherbare Energie durch das enge nutzbare Spannungsfenster in wässrigen Elektrolyten (~ 1 V) begrenzt. Zum anderen ist Aktivkohle, besonders unter oxidativen Bedingungen, anfällig für Korrosion.Bordotierter Diamant hat im Gegensatz dazu ein breites Spannungsfenster, auch in wässrigen Elektrolyten, und ist extrem korrosionsstabil. Von allen bekannten Elektrodenmaterialien hebt sich leitfähiger Diamant seit den 1990er Jahren besonders wegen seiner unerreichten physikalischen und chemischen Eigenschaften ab. Die typische planare Diamantelektrode hat jedoch eine begrenzte Oberfläche, was deren Anwendung in Energiesystemen entgegen steht. Es wurden zwar bereits nanostrukturierte Diamantelektroden entwickelt, diese bleiben aber in der erreichbaren Oberflächenvergrößerung beschränkt. Deren Herstellung beruht auf Plasmaätzen, welches vertikale Strukturen erzeugt. Das maximale Seitenverhältnis dieser Strukturen ist technologisch limitiert, was die erreichbare Oberflächenvergrößerung auf den Faktor 10 – 50 begrenzt, ein Wert der für elektrochemische Energiesysteme unzureichend ist. Elektrochemische Anwendungen dieser Elektroden bleiben daher auf Sensoranwendungen beschränkt. Diese Arbeit stellt einen alternativen und skalierbaren Ansatz zur Herstellung von Diamantelektroden vor, der in der Lage ist eine signifikant höhere Oberflächenvergrößerung zu erreichen. Die damit hergestellten Elektroden wurden auf ihr Potential in zwei Beispielanwendungen aus den Bereichen Energiespeicherung und Energiewandlung untersucht, die direkt von einer vergröße ...']]
### GND ID:
['gnd:1082793361', 'gnd:4012069-7', 'gnd:4014247-4', 'gnd:4152230-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A850939615']
### GND class:
['Gao, Fang', 'Diamant', 'Elektrode', 'Energiespeicher']
<|eot_id|> |
3A85093978X.jsonld | ['Gibbsit- und Aluminiumoxid-Einkristallnanoplättchen für PE-Nanokomposite, Mehrzentrenträgerkatalysatoren und selbstverstärkendes Polyethylen'] | [['Zusammenfassung: This work deals with the synthesis of new reinforced polyethylene nanocomposites based on gibbsite single-crystal nanoplatelets (G-NPL) and oblate Al2O3 particles (corundum). Aqueous pseudohexagonale G-NPL dispersions were obtained by hydrothermal crystallization. Drying of the dispersions resulted in a white solid material which was calcined at 600°C to receive Al2O3 platelets with the same morphology (G-NPL-600). Efforts to get corund-platelets via treatment at 1200°C failed due to sintering of the particles. An alternative synthesis-route yielded in corund-microplatelets (KMP) which were used together with commercial available corund-nanoflakes (WS) as reference-materials. Incorporation of these fillers into polyethylene was conducted on one hand by conventional melt blending and injection molding and on the other hand by rate controlled in-situ polymerizations. Obviously homogeneous platelet dispersions could not be obtained via compounding when the fillers had no surface-modification. In contrast polydopamine surface covered G-NPL were well dispersed in polyethylene by simple compounding. Also the catalytic in-situ polymerizations in presence of platelet-dispersions resulted in well dispersed composite materials. In comparison to unfilled HDPE e-modulus (+ 320 %) and toughness (partial break) were increased simultaneously. G-NPL an G-NPL-600 caused embrittlement, whereas KMP and WS led to 600% break elongations with filler contents up to 8.6 wt.-%.G-NPL and G-NPL-600 were excellent carrier materials in the heterogenic ethylene polymerization. Different catalysts could be immobilized to produce PE-wax, HDPE and UHMWPE. Especially the Brookhart-catalyst FeBIP showed activities up to 32.000 g/mmol h 1. Reaction of G-NPL with stearic acid yielded in a surface covering with the fatty acid of about 1 wt.-% (G-NPL-S). Mixtures of G-NPL-S and G-NPL-600 were used as carriers for the synthesis of bimodal UHMWPE/HDPE reactoblends. The attendance of stearic acid resulted in increased activities (+ 115 %) and better platelets dispersions in the pe-matrix. Furthermore anisotropy of the filler along the injection direction was realized. By variation of the catalyst rates on the surface of the platelets UHMWPE and HDPE contents were selectively adjusted. Processing of these reactorblends via injection molding induced generation of shish-kebab-fibers which were responsible for increased stiffness (+ 100 %) and toughness (partial break).With immobil ...', 'Zusammenfassung: In der vorliegenden Arbeit wurden neue Polyethylen-Nanokomposite auf Basis von Gibbsit-Einkristallnanoplättchen (G NPL) sowie oblaten Al2O3- bzw. Korundpartikeln hergestellt. Die Synthese der pseudohexagonalen Gibbsit-Einkristalle erfolgte als Scale-up (200g) in einer Hydrothermalkristallisation und lieferte wässrige Plättchendispersionen. Durch Trocknen und Calcinieren des Produkts bei 600°C konnte unter Erhalt der Plättchenmorphologie Aluminiumoxid (G NPL 600) erhalten werden. Eine Umwandlung in die Korundmodifikation ging allerdings mit dem Verlust der oblaten Morphologie einher. Dennoch konnten über eine alternative Syntheseroute hexagonale Korund-Mikroplättchen (KMP) erhalten werden, die zusammen mit kommerziellen Korund-Nanoflakes (WS) als Referenz dienten. Die Inkorporierung der Füllstoffe in Polyethylen erfolgte zum einen via konventioneller Verarbeitung durch Extrusion und Spritzguss, und zum anderen durch umsatzkontrollierte in-situ-Polymerisationen. Dabei zeigte sich, dass eine homogene Plättchenverteilung durch einfaches Compoundieren ohne Oberflächenfunktionalisierung nicht möglich ist. Polydopaminbeschichtete Gibbsit-Plättchen konnten hingegen sehr gut in der Polyethylenmatrix dispergiert werden. Auch die katalytische in-situ-Polymerisation in Anwesenheit der Füllstoffdispersionen resultierte in homogenen Verteilungen der oblaten Partikel. Die erhaltenen Komposite profitierten im Vergleich zu ungefülltem HDPE von einer Steifigkeitszunahme von 320% sowie sehr hohen Kerbschlagzähigkeiten (partial break). Während die Nanofüllstoffe G-NPL und G-NPL-600 zu einer Versprödung führten, besaßen KMP- und WS-Komposite bis zu einen Füllstoffgehalt von 8.6 Gew.-% eine Bruchdehnung von 600%. Korund-Plättchen waren nur bedingt als Trägermaterialien für die heterogene Ethylenpolymerisation geeignet, dafür waren G-NPL- und G-NPL-600 als Träger ausgezeichnet dafür, durch Immobilisierung verschiedener Katalysatoren sowohl PE-Wachse, als auch HDPE und UHMWPE herzustellen. Insbesondere der Brookhart-Katalysator FeBIP zeigte auf G-NPL und G-NPL-600 geträgert, Aktivitäten von bis zu 32.000 g/mmol h-1. Durch Umsetzung von G-NPL mit Stearinsäure (G-NPL-S) konnte die Oberfläche der Plättchen mit ca. 1 Gew.-% der Fettsäure beschichtet werden. Diese dienten zusammen mit G-NPL-600 als Träger für die Darstellung bimodaler HDPE/UHMWPE-Reaktorblends. Durch die Anwesenheit der Stearinsä ...']] | ['gnd:1084784505', 'gnd:4076241-5', 'gnd:4123377-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85093978X'] | ['Schwabe, Jeremia', 'Polyethylene', 'Heterogene Katalyse'] | Document
### Title: ['Gibbsit- und Aluminiumoxid-Einkristallnanoplättchen für PE-Nanokomposite, Mehrzentrenträgerkatalysatoren und selbstverstärkendes Polyethylen']
### Abstract:
[['Zusammenfassung: This work deals with the synthesis of new reinforced polyethylene nanocomposites based on gibbsite single-crystal nanoplatelets (G-NPL) and oblate Al2O3 particles (corundum). Aqueous pseudohexagonale G-NPL dispersions were obtained by hydrothermal crystallization. Drying of the dispersions resulted in a white solid material which was calcined at 600°C to receive Al2O3 platelets with the same morphology (G-NPL-600). Efforts to get corund-platelets via treatment at 1200°C failed due to sintering of the particles. An alternative synthesis-route yielded in corund-microplatelets (KMP) which were used together with commercial available corund-nanoflakes (WS) as reference-materials. Incorporation of these fillers into polyethylene was conducted on one hand by conventional melt blending and injection molding and on the other hand by rate controlled in-situ polymerizations. Obviously homogeneous platelet dispersions could not be obtained via compounding when the fillers had no surface-modification. In contrast polydopamine surface covered G-NPL were well dispersed in polyethylene by simple compounding. Also the catalytic in-situ polymerizations in presence of platelet-dispersions resulted in well dispersed composite materials. In comparison to unfilled HDPE e-modulus (+ 320 %) and toughness (partial break) were increased simultaneously. G-NPL an G-NPL-600 caused embrittlement, whereas KMP and WS led to 600% break elongations with filler contents up to 8.6 wt.-%.G-NPL and G-NPL-600 were excellent carrier materials in the heterogenic ethylene polymerization. Different catalysts could be immobilized to produce PE-wax, HDPE and UHMWPE. Especially the Brookhart-catalyst FeBIP showed activities up to 32.000 g/mmol h 1. Reaction of G-NPL with stearic acid yielded in a surface covering with the fatty acid of about 1 wt.-% (G-NPL-S). Mixtures of G-NPL-S and G-NPL-600 were used as carriers for the synthesis of bimodal UHMWPE/HDPE reactoblends. The attendance of stearic acid resulted in increased activities (+ 115 %) and better platelets dispersions in the pe-matrix. Furthermore anisotropy of the filler along the injection direction was realized. By variation of the catalyst rates on the surface of the platelets UHMWPE and HDPE contents were selectively adjusted. Processing of these reactorblends via injection molding induced generation of shish-kebab-fibers which were responsible for increased stiffness (+ 100 %) and toughness (partial break).With immobil ...', 'Zusammenfassung: In der vorliegenden Arbeit wurden neue Polyethylen-Nanokomposite auf Basis von Gibbsit-Einkristallnanoplättchen (G NPL) sowie oblaten Al2O3- bzw. Korundpartikeln hergestellt. Die Synthese der pseudohexagonalen Gibbsit-Einkristalle erfolgte als Scale-up (200g) in einer Hydrothermalkristallisation und lieferte wässrige Plättchendispersionen. Durch Trocknen und Calcinieren des Produkts bei 600°C konnte unter Erhalt der Plättchenmorphologie Aluminiumoxid (G NPL 600) erhalten werden. Eine Umwandlung in die Korundmodifikation ging allerdings mit dem Verlust der oblaten Morphologie einher. Dennoch konnten über eine alternative Syntheseroute hexagonale Korund-Mikroplättchen (KMP) erhalten werden, die zusammen mit kommerziellen Korund-Nanoflakes (WS) als Referenz dienten. Die Inkorporierung der Füllstoffe in Polyethylen erfolgte zum einen via konventioneller Verarbeitung durch Extrusion und Spritzguss, und zum anderen durch umsatzkontrollierte in-situ-Polymerisationen. Dabei zeigte sich, dass eine homogene Plättchenverteilung durch einfaches Compoundieren ohne Oberflächenfunktionalisierung nicht möglich ist. Polydopaminbeschichtete Gibbsit-Plättchen konnten hingegen sehr gut in der Polyethylenmatrix dispergiert werden. Auch die katalytische in-situ-Polymerisation in Anwesenheit der Füllstoffdispersionen resultierte in homogenen Verteilungen der oblaten Partikel. Die erhaltenen Komposite profitierten im Vergleich zu ungefülltem HDPE von einer Steifigkeitszunahme von 320% sowie sehr hohen Kerbschlagzähigkeiten (partial break). Während die Nanofüllstoffe G-NPL und G-NPL-600 zu einer Versprödung führten, besaßen KMP- und WS-Komposite bis zu einen Füllstoffgehalt von 8.6 Gew.-% eine Bruchdehnung von 600%. Korund-Plättchen waren nur bedingt als Trägermaterialien für die heterogene Ethylenpolymerisation geeignet, dafür waren G-NPL- und G-NPL-600 als Träger ausgezeichnet dafür, durch Immobilisierung verschiedener Katalysatoren sowohl PE-Wachse, als auch HDPE und UHMWPE herzustellen. Insbesondere der Brookhart-Katalysator FeBIP zeigte auf G-NPL und G-NPL-600 geträgert, Aktivitäten von bis zu 32.000 g/mmol h-1. Durch Umsetzung von G-NPL mit Stearinsäure (G-NPL-S) konnte die Oberfläche der Plättchen mit ca. 1 Gew.-% der Fettsäure beschichtet werden. Diese dienten zusammen mit G-NPL-600 als Träger für die Darstellung bimodaler HDPE/UHMWPE-Reaktorblends. Durch die Anwesenheit der Stearinsä ...']]
### GND ID:
['gnd:1084784505', 'gnd:4076241-5', 'gnd:4123377-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85093978X']
### GND class:
['Schwabe, Jeremia', 'Polyethylene', 'Heterogene Katalyse']
<|eot_id|> |
3A850940206.jsonld | ['Curved boundary crossing of bessel processes'] | ['Zusammenfassung: We study the first exit time of a Bessel process over a curved boundary and find several asymptotic formulas for the corresponding first exit densities.We start with the examination of the first time at which a multi-dimensional Brownian motion hits a hyperplane and determine its density as well as the joint density of the first hitting time and the location of the first hit. From this we deduce an upper bound for the density of the first exit time of a Bessel process over a straight line.Then, we derive higher-dimensional counterparts of two well-known integral equations for the first exit density of a one-dimensional Brownian motion. They build the basis of our arguments in the following chapters.After that, we obtain two asymptotic representations of the first exit density of a Bessel process over a curved boundary for large times. We only study boundaries that are upperclass functions at infinity and that satisfy certain additional conditions.In the last chapter, we first complete the result of the first chapter by giving a lower bound for the first exit density of a Bessel process over a straight line.This is followed by the examination of first exit densities for distant boundaries. We find that under certain conditions the first exit density over a curved boundary is asymptotically equivalent to the density of the first exit time over the accompanying tangent to this boundary. This result is then further refined.We close the chapter with an example for another possible approach to first boundary crossing problems, the method of images. Our findings in this last section are further confirmation of the preceding results'] | ['gnd:1084363259', 'gnd:4128328-4', 'gnd:4274463-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A850940206'] | ['Maahs, Ilse', 'Brownsche Bewegung', 'Diffusionsprozess'] | Document
### Title: ['Curved boundary crossing of bessel processes']
### Abstract:
['Zusammenfassung: We study the first exit time of a Bessel process over a curved boundary and find several asymptotic formulas for the corresponding first exit densities.We start with the examination of the first time at which a multi-dimensional Brownian motion hits a hyperplane and determine its density as well as the joint density of the first hitting time and the location of the first hit. From this we deduce an upper bound for the density of the first exit time of a Bessel process over a straight line.Then, we derive higher-dimensional counterparts of two well-known integral equations for the first exit density of a one-dimensional Brownian motion. They build the basis of our arguments in the following chapters.After that, we obtain two asymptotic representations of the first exit density of a Bessel process over a curved boundary for large times. We only study boundaries that are upperclass functions at infinity and that satisfy certain additional conditions.In the last chapter, we first complete the result of the first chapter by giving a lower bound for the first exit density of a Bessel process over a straight line.This is followed by the examination of first exit densities for distant boundaries. We find that under certain conditions the first exit density over a curved boundary is asymptotically equivalent to the density of the first exit time over the accompanying tangent to this boundary. This result is then further refined.We close the chapter with an example for another possible approach to first boundary crossing problems, the method of images. Our findings in this last section are further confirmation of the preceding results']
### GND ID:
['gnd:1084363259', 'gnd:4128328-4', 'gnd:4274463-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A850940206']
### GND class:
['Maahs, Ilse', 'Brownsche Bewegung', 'Diffusionsprozess']
<|eot_id|> |
3A851377505.jsonld | ['Hand pose recognition using a consumer depth camera'] | ['Model-based pose estimation, gesture recognition, time-of-flight imaging. - Modellbasierte Poseschätzung, Gestenerkennung, Time-of-Flight-Bildgebung'] | ['gnd:4023207-4', 'gnd:4157147-2', 'gnd:64681-7', 'gnd:7669579-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A851377505'] | ['Hand', 'Geste', 'Gottfried Wilhelm Leibniz Universität Hannover', 'ToF-Kamera'] | Document
### Title: ['Hand pose recognition using a consumer depth camera']
### Abstract:
['Model-based pose estimation, gesture recognition, time-of-flight imaging. - Modellbasierte Poseschätzung, Gestenerkennung, Time-of-Flight-Bildgebung']
### GND ID:
['gnd:4023207-4', 'gnd:4157147-2', 'gnd:64681-7', 'gnd:7669579-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A851377505']
### GND class:
['Hand', 'Geste', 'Gottfried Wilhelm Leibniz Universität Hannover', 'ToF-Kamera']
<|eot_id|> |
3A851734944.jsonld | ['Interne Moleküldynamik und Analyse von Gasmischungsspektren (BTEM) mit der Neuentwicklung eines breitbandigen Fouriertransform-Mikrowellen(FT-MW)-Spektrometers'] | ['Rotationsspektroskopie, Mikrowellen-Spektroskopie, in-phase/quadrature-phase-Modulation Passage-Acquired-Coherence Technique (IMPACT), Zirp-Anregung, Pulsanregung, interne Dynamik, interne Rotation, Inversion, Struktur, Feinstruktur, Hyperfeinstruktur, Band-Target Entropy Minimization (BTEM), Difluorphenol, Coaxially Oriented Beam-Resonator-Arrangement (COBRA). - Rotational spectroscopy, microwave spectroscopy, chirp excitation, pulse excitation, internal dynamics, internal rotation, structure, fine structure, hyperfine structure, difluorophenole'] | ['gnd:108256251', 'gnd:113413572', 'gnd:4135413-8', 'gnd:4169895-2', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A851734944'] | ['Binnewies, Michael', 'Grabow, Jens-Uwe', 'Fourier-Spektroskopie', 'Mikrowellenspektroskopie', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Interne Moleküldynamik und Analyse von Gasmischungsspektren (BTEM) mit der Neuentwicklung eines breitbandigen Fouriertransform-Mikrowellen(FT-MW)-Spektrometers']
### Abstract:
['Rotationsspektroskopie, Mikrowellen-Spektroskopie, in-phase/quadrature-phase-Modulation Passage-Acquired-Coherence Technique (IMPACT), Zirp-Anregung, Pulsanregung, interne Dynamik, interne Rotation, Inversion, Struktur, Feinstruktur, Hyperfeinstruktur, Band-Target Entropy Minimization (BTEM), Difluorphenol, Coaxially Oriented Beam-Resonator-Arrangement (COBRA). - Rotational spectroscopy, microwave spectroscopy, chirp excitation, pulse excitation, internal dynamics, internal rotation, structure, fine structure, hyperfine structure, difluorophenole']
### GND ID:
['gnd:108256251', 'gnd:113413572', 'gnd:4135413-8', 'gnd:4169895-2', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A851734944']
### GND class:
['Binnewies, Michael', 'Grabow, Jens-Uwe', 'Fourier-Spektroskopie', 'Mikrowellenspektroskopie', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A851743145.jsonld | ['Einfach und mehrfach Vierring-anellierte Arene und ihre Chrom-Komplexe'] | ['Chrom, Chromkomplexe, Benzocyclobutene, Polycyclen, Regioselektivität, Acetale, Oxidationen. - Chromium, chromium complexes, benzocyclobutenes, polycles, regioselectivity, acetals, oxidations'] | ['gnd:110287320', 'gnd:111686121', 'gnd:4222904-2', 'gnd:4336695-8', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A851743145'] | ['Butenschön, Holger', 'Kirschning, Andreas', 'Chromkomplexe', 'Benzocyclobutenderivate', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Einfach und mehrfach Vierring-anellierte Arene und ihre Chrom-Komplexe']
### Abstract:
['Chrom, Chromkomplexe, Benzocyclobutene, Polycyclen, Regioselektivität, Acetale, Oxidationen. - Chromium, chromium complexes, benzocyclobutenes, polycles, regioselectivity, acetals, oxidations']
### GND ID:
['gnd:110287320', 'gnd:111686121', 'gnd:4222904-2', 'gnd:4336695-8', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A851743145']
### GND class:
['Butenschön, Holger', 'Kirschning, Andreas', 'Chromkomplexe', 'Benzocyclobutenderivate', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A852169833.jsonld | ['Studien zur Total- und Mutasynthese von Myxovalargin und synthetische Untersuchungen zu den Cystobactamiden'] | ['Myxovalargin, Cystobactamide, Totalsynthese, Oligopeptide, Buchwald-Kreuzkupplung. - Cystobactamides, total synthesis, oligopeptides, Buchwald cross coupling'] | ['gnd:4170985-8', 'gnd:4172550-5', 'gnd:4297547-5', 'gnd:4412308-5', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A852169833'] | ['Myxobakterien', 'Oligopeptide', 'Dehydroaminosäuren', 'Totalsynthese', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Studien zur Total- und Mutasynthese von Myxovalargin und synthetische Untersuchungen zu den Cystobactamiden']
### Abstract:
['Myxovalargin, Cystobactamide, Totalsynthese, Oligopeptide, Buchwald-Kreuzkupplung. - Cystobactamides, total synthesis, oligopeptides, Buchwald cross coupling']
### GND ID:
['gnd:4170985-8', 'gnd:4172550-5', 'gnd:4297547-5', 'gnd:4412308-5', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A852169833']
### GND class:
['Myxobakterien', 'Oligopeptide', 'Dehydroaminosäuren', 'Totalsynthese', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A852692838.jsonld | ['Biomass derived carbon for new energy storage technologies'] | ['The thesis deals with the production and evaluation of porous carbon materials for energy storage technologies, namely super capacitors and lithium sulfur batteries.'] | ['gnd:1092224505', 'gnd:2120681-8', 'gnd:4167941-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A852692838'] | ['Schipper, Florian', 'Universität Potsdam', 'Lithium-Schwefel-Batterie'] | Document
### Title: ['Biomass derived carbon for new energy storage technologies']
### Abstract:
['The thesis deals with the production and evaluation of porous carbon materials for energy storage technologies, namely super capacitors and lithium sulfur batteries.']
### GND ID:
['gnd:1092224505', 'gnd:2120681-8', 'gnd:4167941-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A852692838']
### GND class:
['Schipper, Florian', 'Universität Potsdam', 'Lithium-Schwefel-Batterie']
<|eot_id|> |
3A852798016.jsonld | ['Area studies revisited : die Geschichte der Lateinamerikastudien in den USA,1940 bis 1970'] | ['This book challenges the common notion of U.S. area studies as a powerful Cold War enterprise, created with massive help from philanthropic foundations as well as the government and exploited for strategic purposes of a superpower. Looking at the history of Latin American studies in the United States between the late 1930s and 1970s, the study focuses particularly on the role of funding policies, thereby developing an alternative narrative of the cycles and institutional development of area studies. The expansion of Latin American studies was characterized by a growing but fragile network of individual scholars, science managers, scholarly committees and university centers as well as funding agencies like the Rockefeller Foundation and the U.S. Office of Education, all of them trying to influence the fate of Latin American studies with their oftentimes conflicting political interests. Though foundations and government agencies pursued ambitious goals by funding area studies their influence was often severely limited by a lack of knowledge and resources, a frequent change of their funding priorities and not least by internal dynamics in universities. While the new concept of area studies became a powerful model for funding policies after 1945 Latin American studies programs were in fact characterized by a huge institutional variety and more often than not by a marginal and precarious position within their respective universities. Based on multi-archival research this book sheds new light on the history of area studies in the United States and thereby contributes to a more nuanced understanding of the study of world regions in an age of globalization.'] | ['gnd:102200588X', 'gnd:2024343-1', 'gnd:4058216-4', 'gnd:4074032-8', 'gnd:4078704-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A852798016'] | ['Loschke, Torsten', 'Universität Leipzig', 'Studium', 'Lateinamerika', 'USA'] | Document
### Title: ['Area studies revisited : die Geschichte der Lateinamerikastudien in den USA,1940 bis 1970']
### Abstract:
['This book challenges the common notion of U.S. area studies as a powerful Cold War enterprise, created with massive help from philanthropic foundations as well as the government and exploited for strategic purposes of a superpower. Looking at the history of Latin American studies in the United States between the late 1930s and 1970s, the study focuses particularly on the role of funding policies, thereby developing an alternative narrative of the cycles and institutional development of area studies. The expansion of Latin American studies was characterized by a growing but fragile network of individual scholars, science managers, scholarly committees and university centers as well as funding agencies like the Rockefeller Foundation and the U.S. Office of Education, all of them trying to influence the fate of Latin American studies with their oftentimes conflicting political interests. Though foundations and government agencies pursued ambitious goals by funding area studies their influence was often severely limited by a lack of knowledge and resources, a frequent change of their funding priorities and not least by internal dynamics in universities. While the new concept of area studies became a powerful model for funding policies after 1945 Latin American studies programs were in fact characterized by a huge institutional variety and more often than not by a marginal and precarious position within their respective universities. Based on multi-archival research this book sheds new light on the history of area studies in the United States and thereby contributes to a more nuanced understanding of the study of world regions in an age of globalization.']
### GND ID:
['gnd:102200588X', 'gnd:2024343-1', 'gnd:4058216-4', 'gnd:4074032-8', 'gnd:4078704-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A852798016']
### GND class:
['Loschke, Torsten', 'Universität Leipzig', 'Studium', 'Lateinamerika', 'USA']
<|eot_id|> |
3A853178569.jsonld | ['The valence of odors and odor mixtures in Drosophila'] | ['Drosophila melanogaster detects odors using olfactory sensory neurons (OSNs), the primary neurons of the olfactory system, located on two types of head appendages, the antennae and the maxillary palps. These OSNs differ in their ligand specificities. Some of them are specific for signature chemicals of ecological interest to the fly. Others can be activated by a broad spectrum of odorants. In this dissertation we aimed at a deeper understanding of the contribution of individual OSN classes to the evaluation of odor signals. Using – among other methods – a high-resolution bioassay for assessing odor-guided behavior in flies, we were able to identify and behaviorally characterize hitherto unidentified Drosophila pheromones. Methyl laurate, one of the pheromones, activates two OSN classes, one of which exclusively mediates attraction towards this compound, while the other one contributes to male copulation success without affecting attraction. In this intra-specific communication system, the non-redundant behavioral relevance of two different OSN classes could be demonstrated by examining flies mutant for either of the two pheromone receptors. To allow for the examination of other OSN classes expressing less specific ORs, we aimed at establishing genetic tools to silence different OSN populations. Unfortunately, none of the tools we tested proved dependable enough for a large-scale investigation to assess valence weights of less specific OSN classes. In an alternative approach, we examined whether the hedonic valence of odor mixtures can be predicted on the basis of mixture constituent valences. Physiologically, binary odor mixtures often retain component information and my results show that the valence of a binary odor mixture can be even quantitatively predicted on the basis of component valences. Hence, our results support the idea that hedonic valence of a complex odor results from the integration of the valence weights of individual processing channels.'] | ['gnd:1096231530', 'gnd:36164-1', 'gnd:4078168-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853178569'] | ['Thoma, Michael', 'Friedrich-Schiller-Universität Jena', 'Taufliege'] | Document
### Title: ['The valence of odors and odor mixtures in Drosophila']
### Abstract:
['Drosophila melanogaster detects odors using olfactory sensory neurons (OSNs), the primary neurons of the olfactory system, located on two types of head appendages, the antennae and the maxillary palps. These OSNs differ in their ligand specificities. Some of them are specific for signature chemicals of ecological interest to the fly. Others can be activated by a broad spectrum of odorants. In this dissertation we aimed at a deeper understanding of the contribution of individual OSN classes to the evaluation of odor signals. Using – among other methods – a high-resolution bioassay for assessing odor-guided behavior in flies, we were able to identify and behaviorally characterize hitherto unidentified Drosophila pheromones. Methyl laurate, one of the pheromones, activates two OSN classes, one of which exclusively mediates attraction towards this compound, while the other one contributes to male copulation success without affecting attraction. In this intra-specific communication system, the non-redundant behavioral relevance of two different OSN classes could be demonstrated by examining flies mutant for either of the two pheromone receptors. To allow for the examination of other OSN classes expressing less specific ORs, we aimed at establishing genetic tools to silence different OSN populations. Unfortunately, none of the tools we tested proved dependable enough for a large-scale investigation to assess valence weights of less specific OSN classes. In an alternative approach, we examined whether the hedonic valence of odor mixtures can be predicted on the basis of mixture constituent valences. Physiologically, binary odor mixtures often retain component information and my results show that the valence of a binary odor mixture can be even quantitatively predicted on the basis of component valences. Hence, our results support the idea that hedonic valence of a complex odor results from the integration of the valence weights of individual processing channels.']
### GND ID:
['gnd:1096231530', 'gnd:36164-1', 'gnd:4078168-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853178569']
### GND class:
['Thoma, Michael', 'Friedrich-Schiller-Universität Jena', 'Taufliege']
<|eot_id|> |
3A853184801.jsonld | ['Strukturbildung in fermentierten Milchprodukten durch Laccasen aus Basidiomyceten'] | ['Cross-linking, Laccase, Mediator, viskoelastische Eigenschaften, Rheologie, Magermilchjoghurt, Basidiomycota, Pleurotus eryngii, Viskosität. - Viscoelastic properties, rheology, viscosity, skimmed milk yoghurt'] | ['gnd:113003722', 'gnd:120092190', 'gnd:4073048-7', 'gnd:4134965-9', 'gnd:4139250-4', 'gnd:4329257-4', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853184801'] | ['Berger, Ralf G.', 'Hahn, Andreas', 'Joghurt', 'Milchproteine', 'Vernetzung (Chemie)', 'Laccase', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Strukturbildung in fermentierten Milchprodukten durch Laccasen aus Basidiomyceten']
### Abstract:
['Cross-linking, Laccase, Mediator, viskoelastische Eigenschaften, Rheologie, Magermilchjoghurt, Basidiomycota, Pleurotus eryngii, Viskosität. - Viscoelastic properties, rheology, viscosity, skimmed milk yoghurt']
### GND ID:
['gnd:113003722', 'gnd:120092190', 'gnd:4073048-7', 'gnd:4134965-9', 'gnd:4139250-4', 'gnd:4329257-4', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853184801']
### GND class:
['Berger, Ralf G.', 'Hahn, Andreas', 'Joghurt', 'Milchproteine', 'Vernetzung (Chemie)', 'Laccase', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A853473250.jsonld | ['Präparation und Charakterisierung polymerer Ein- und Mehrschichtsysteme als Referenzmaterialien für die Kalibrierung festkörperspektroskopischer Analysenverfahren'] | ['Referenzmaterialien, Schichtsysteme, Festkörperspektroskopie. - Reference materials, layer systems, solid state spectroscopy'] | ['gnd:4226322-0', 'gnd:4325169-9', 'gnd:4335816-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853473250'] | ['Festkörperspektroskopie', 'Schichtwerkstoff', 'ABS-Kunststoffe', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Präparation und Charakterisierung polymerer Ein- und Mehrschichtsysteme als Referenzmaterialien für die Kalibrierung festkörperspektroskopischer Analysenverfahren']
### Abstract:
['Referenzmaterialien, Schichtsysteme, Festkörperspektroskopie. - Reference materials, layer systems, solid state spectroscopy']
### GND ID:
['gnd:4226322-0', 'gnd:4325169-9', 'gnd:4335816-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853473250']
### GND class:
['Festkörperspektroskopie', 'Schichtwerkstoff', 'ABS-Kunststoffe', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A853490643.jsonld | ['Elektronischer und phasenkohärenter Transport in uni- und bipolaren Graphen-Systemen'] | ['Graphen, Aharonov-Bohm-Effekt, Rand-Unordnung, p-n-Übergang. - Graphene, Aharonov-Bohm effect, edge disorder, p-n junction'] | ['gnd:4077445-4', 'gnd:4077447-8', 'gnd:4136925-7', 'gnd:4139923-7', 'gnd:4194061-1', 'gnd:4210733-7', 'gnd:64681-7', 'gnd:7591667-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853490643'] | ['Silicium', 'Siliciumdioxid', 'Dünne Schicht', 'Kohärenz', 'Aharonov-Bohm-Effekt', 'Elektronischer Transport', 'Gottfried Wilhelm Leibniz Universität Hannover', 'Graphen'] | Document
### Title: ['Elektronischer und phasenkohärenter Transport in uni- und bipolaren Graphen-Systemen']
### Abstract:
['Graphen, Aharonov-Bohm-Effekt, Rand-Unordnung, p-n-Übergang. - Graphene, Aharonov-Bohm effect, edge disorder, p-n junction']
### GND ID:
['gnd:4077445-4', 'gnd:4077447-8', 'gnd:4136925-7', 'gnd:4139923-7', 'gnd:4194061-1', 'gnd:4210733-7', 'gnd:64681-7', 'gnd:7591667-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A853490643']
### GND class:
['Silicium', 'Siliciumdioxid', 'Dünne Schicht', 'Kohärenz', 'Aharonov-Bohm-Effekt', 'Elektronischer Transport', 'Gottfried Wilhelm Leibniz Universität Hannover', 'Graphen']
<|eot_id|> |
3A855121483.jsonld | ['Steuerungsverständnisse und Steuerungsformen in Weiterbildungsorganisationen'] | ['Organisationsidentität, Weiterbildungsorganisation, Selbststeuerung. - Training organisation, organisational identity, self-control'] | ['gnd:4037278-9', 'gnd:4065275-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A855121483'] | ['Management', 'Weiterbildungseinrichtung', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Steuerungsverständnisse und Steuerungsformen in Weiterbildungsorganisationen']
### Abstract:
['Organisationsidentität, Weiterbildungsorganisation, Selbststeuerung. - Training organisation, organisational identity, self-control']
### GND ID:
['gnd:4037278-9', 'gnd:4065275-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A855121483']
### GND class:
['Management', 'Weiterbildungseinrichtung', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A855631643.jsonld | ['Totalsynthese der Aetheramide A und B'] | ['Naturstoffe, Aetheramide, Totalsynthese, vinyloge Mukaiyama Aldolreaktion, Strukturaufklärung. - Natural products, aetheramides, total synthesis, vinylogous Mukaiyama aldol reaction, structure elucidation'] | ['gnd:4037172-4', 'gnd:4166378-0', 'gnd:4171332-1', 'gnd:4324196-7', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A855631643'] | ['Makromolekül', 'Lactone', 'Naturstoffchemie', 'Aldolreaktion', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Totalsynthese der Aetheramide A und B']
### Abstract:
['Naturstoffe, Aetheramide, Totalsynthese, vinyloge Mukaiyama Aldolreaktion, Strukturaufklärung. - Natural products, aetheramides, total synthesis, vinylogous Mukaiyama aldol reaction, structure elucidation']
### GND ID:
['gnd:4037172-4', 'gnd:4166378-0', 'gnd:4171332-1', 'gnd:4324196-7', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A855631643']
### GND class:
['Makromolekül', 'Lactone', 'Naturstoffchemie', 'Aldolreaktion', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A856161497.jsonld | ['A grid-adaptive algebraic hybrid RANS/LES method'] | ['The present thesis considers the compressible Navier-Stokes equations to simulate the flow of air about basic and complex test cases. As numerical solution method the unstructured finite-volume solver DLR-TAU is used. The aim of the work is to provide a hybrid RANS/LES simulation strategy for the reliable numerical prediction of the stall behavior of high-lift airfoils under the influence of turbulent inflow. The Algebraic Delayed DES (ADDES) is extended, improved, and validated for several fundamental flow cases and application challenges. In the ADDES the distinction between RANS and LES ...'] | ['gnd:1041633386', 'gnd:109799925', 'gnd:1107204968', 'gnd:1151520918', 'gnd:128593938', 'gnd:4117265-6', 'gnd:4261715-7', 'gnd:4315616-2', 'gnd:4522522-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856161497'] | ['Überziehen (Flugzeug)', 'Lube, Gert', 'Reuß, Silvia', 'Radespiel, Rolf', 'Knopp, Tobias', 'Turbulente Strömung', 'Reynoldssche Gleichung', 'LES (Strömung)', 'Klappe (Flugzeug)'] | Document
### Title: ['A grid-adaptive algebraic hybrid RANS/LES method']
### Abstract:
['The present thesis considers the compressible Navier-Stokes equations to simulate the flow of air about basic and complex test cases. As numerical solution method the unstructured finite-volume solver DLR-TAU is used. The aim of the work is to provide a hybrid RANS/LES simulation strategy for the reliable numerical prediction of the stall behavior of high-lift airfoils under the influence of turbulent inflow. The Algebraic Delayed DES (ADDES) is extended, improved, and validated for several fundamental flow cases and application challenges. In the ADDES the distinction between RANS and LES ...']
### GND ID:
['gnd:1041633386', 'gnd:109799925', 'gnd:1107204968', 'gnd:1151520918', 'gnd:128593938', 'gnd:4117265-6', 'gnd:4261715-7', 'gnd:4315616-2', 'gnd:4522522-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856161497']
### GND class:
['Überziehen (Flugzeug)', 'Lube, Gert', 'Reuß, Silvia', 'Radespiel, Rolf', 'Knopp, Tobias', 'Turbulente Strömung', 'Reynoldssche Gleichung', 'LES (Strömung)', 'Klappe (Flugzeug)']
<|eot_id|> |
3A85621647X.jsonld | ['Vergleich von statistischen Tests im verbundenen und unabhängigen Stichprobenfall'] | ['Vergleich von Experimenten, Hypothesentests, Effizienz. - Comparison of experiments, testing hypotheses, efficiency'] | ['gnd:4077852-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85621647X'] | ['Statistischer Test', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Vergleich von statistischen Tests im verbundenen und unabhängigen Stichprobenfall']
### Abstract:
['Vergleich von Experimenten, Hypothesentests, Effizienz. - Comparison of experiments, testing hypotheses, efficiency']
### GND ID:
['gnd:4077852-6', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85621647X']
### GND class:
['Statistischer Test', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A856273457.jsonld | ['Valuation and value creation of insurance intermediaries'] | ['Introduction -- Agents and brokers in the insurance industry : an intriguing area for further research -- Valuation of small and medium-sized insurance brokers : establishing a valuation approach for business succession -- Value creation in insurance intermediary mergers and acquisitions : an opportunity for realizing positive abnormal returns -- Performance transformation in the tied agent channel : achieving a step-change in tied agent productivity -- Summary and concluding remarks -- Appendix -- Publication bibliography'] | ['gnd:1102254444', 'gnd:4063192-8', 'gnd:4132339-7', 'gnd:4188015-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856273457'] | ['Max, Claudia', 'Versicherungsmakler', 'Beurteilung', 'Versicherungsvermittlung'] | Document
### Title: ['Valuation and value creation of insurance intermediaries']
### Abstract:
['Introduction -- Agents and brokers in the insurance industry : an intriguing area for further research -- Valuation of small and medium-sized insurance brokers : establishing a valuation approach for business succession -- Value creation in insurance intermediary mergers and acquisitions : an opportunity for realizing positive abnormal returns -- Performance transformation in the tied agent channel : achieving a step-change in tied agent productivity -- Summary and concluding remarks -- Appendix -- Publication bibliography']
### GND ID:
['gnd:1102254444', 'gnd:4063192-8', 'gnd:4132339-7', 'gnd:4188015-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856273457']
### GND class:
['Max, Claudia', 'Versicherungsmakler', 'Beurteilung', 'Versicherungsvermittlung']
<|eot_id|> |
3A856327913.jsonld | ['Control of ultrashort pulses in nonlinear dispersive media'] | ['Ultrafast processes in fibers, pulse compression, filament propagation. - Ultraschnelle Prozesse in Fasern, Pulskomprimierung'] | ['gnd:4135213-0', 'gnd:4140376-9', 'gnd:4150202-4', 'gnd:4167589-7', 'gnd:4176342-7', 'gnd:4222149-3', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856327913'] | ['Soliton', 'Nichtlineare Wellenausbreitung', 'Dispersion (Welle)', 'Lichtleitfaser', 'Pulskompression', 'Ultrakurzer Lichtimpuls', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Control of ultrashort pulses in nonlinear dispersive media']
### Abstract:
['Ultrafast processes in fibers, pulse compression, filament propagation. - Ultraschnelle Prozesse in Fasern, Pulskomprimierung']
### GND ID:
['gnd:4135213-0', 'gnd:4140376-9', 'gnd:4150202-4', 'gnd:4167589-7', 'gnd:4176342-7', 'gnd:4222149-3', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856327913']
### GND class:
['Soliton', 'Nichtlineare Wellenausbreitung', 'Dispersion (Welle)', 'Lichtleitfaser', 'Pulskompression', 'Ultrakurzer Lichtimpuls', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A856383686.jsonld | ['Anhydromonosaccharide als Biomarker für den Eintrag von Holzverbrennungsprodukten in marine Sedimente'] | [['Particles from biomass combustion contain particularly high levels of cellulose and hemicellulose derivates. Levoglucosan is a major pyrolysis product of cellulose, and has recently been highlighted as a useful molecular marker of biomass-burning. The present thesis deals with the investigation of monosaccharide anhydrides in sediments found at different sites in two countries, namely in the Jade Bay, situated in Germany on the southern coast of the North Sea and in Indonesia, where samples of siak-river sediments were taken from as well as from the coastal region of East Sumatra. The results show that in most of the surface sediment samples taken from the sites above-mentioned low level concentration between 0.04 - 1.5 myg/g of levoglucosan could be detected. The organic carbon content was identified in all sediment samples: it fluctuates between 0.02 and 13.1 %. By reference to the analysis of the particle size nearly all surface sediments show silt and semi-fine sands. Black carbon particles could be determined in all sediments. It was found in the Jade Bay sediments ranging from 8 to 430 n/10 g TM and in the coastal sample of East Sumatra between 21 - 312 n/10 g TM. <engl.>', 'Partikel aus der Biomasseverbrennung enthalten besonders hohe Gehalte an Cellulose- und Hemicellulose-Derivaten (Anhydromonosaccharide, insbesondere Levoglucosan). Levoglucosan entsteht während der Pyrolyse von Cellulose und wird als Hauptindikator für emittierte Partikel bei der Biomasseverbrennung verwendet. Die vorliegende Arbeit befasst sich mit der Untersuchung von Anhydromonosacchariden in den Sedimentproben, die aus Deutschland: Jadebusen an der südlichen Nordsee sowie aus dem Siak-Fluss und von Ostküste -Sumatra in Indonesien stammen. Die erhaltenen Ergebnisse zeigen, dass in den meisten Sedimentproben aller o.g. Standorte niedrige Gehalte an Levoglucosan zwischen 0,04 - 1,5 myg/g bestimmt wurden. Der Gehalt an organischem Kohlenstoff wurde in allen Sedimentproben bestimmt, er schwankt zwischen 0,02 und 13,1 %. Anhand der Ergebnisse der Korngrößenanalyse zeigen fast alle Sedimente meist Schluffe bis Mittelsande. Black Carbon Partikel konnten in allen Sedimenten bestimmt werden. Die im Jadebusen gefundenen Black Carbon Partikel variieren zwischen 8 - 430 n/10 g TM und die im Sumatra-Küstengebiet reichen von 21 - 312 n/10 g TM. <dt.>']] | ['gnd:115559655', 'gnd:4006877-8', 'gnd:4047925-0', 'gnd:4062656-8', 'gnd:4147460-0', 'gnd:4170482-4', 'gnd:4178736-5', 'gnd:4425928-1', 'gnd:4660192-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856383686'] | ['Freund, Holger', 'Biomasse', 'Pyrolyse', 'Verbrennung', 'Cellulosederivate', 'Monosaccharide', 'Ruß', 'Biomarker', 'Anhydrozucker'] | Document
### Title: ['Anhydromonosaccharide als Biomarker für den Eintrag von Holzverbrennungsprodukten in marine Sedimente']
### Abstract:
[['Particles from biomass combustion contain particularly high levels of cellulose and hemicellulose derivates. Levoglucosan is a major pyrolysis product of cellulose, and has recently been highlighted as a useful molecular marker of biomass-burning. The present thesis deals with the investigation of monosaccharide anhydrides in sediments found at different sites in two countries, namely in the Jade Bay, situated in Germany on the southern coast of the North Sea and in Indonesia, where samples of siak-river sediments were taken from as well as from the coastal region of East Sumatra. The results show that in most of the surface sediment samples taken from the sites above-mentioned low level concentration between 0.04 - 1.5 myg/g of levoglucosan could be detected. The organic carbon content was identified in all sediment samples: it fluctuates between 0.02 and 13.1 %. By reference to the analysis of the particle size nearly all surface sediments show silt and semi-fine sands. Black carbon particles could be determined in all sediments. It was found in the Jade Bay sediments ranging from 8 to 430 n/10 g TM and in the coastal sample of East Sumatra between 21 - 312 n/10 g TM. <engl.>', 'Partikel aus der Biomasseverbrennung enthalten besonders hohe Gehalte an Cellulose- und Hemicellulose-Derivaten (Anhydromonosaccharide, insbesondere Levoglucosan). Levoglucosan entsteht während der Pyrolyse von Cellulose und wird als Hauptindikator für emittierte Partikel bei der Biomasseverbrennung verwendet. Die vorliegende Arbeit befasst sich mit der Untersuchung von Anhydromonosacchariden in den Sedimentproben, die aus Deutschland: Jadebusen an der südlichen Nordsee sowie aus dem Siak-Fluss und von Ostküste -Sumatra in Indonesien stammen. Die erhaltenen Ergebnisse zeigen, dass in den meisten Sedimentproben aller o.g. Standorte niedrige Gehalte an Levoglucosan zwischen 0,04 - 1,5 myg/g bestimmt wurden. Der Gehalt an organischem Kohlenstoff wurde in allen Sedimentproben bestimmt, er schwankt zwischen 0,02 und 13,1 %. Anhand der Ergebnisse der Korngrößenanalyse zeigen fast alle Sedimente meist Schluffe bis Mittelsande. Black Carbon Partikel konnten in allen Sedimenten bestimmt werden. Die im Jadebusen gefundenen Black Carbon Partikel variieren zwischen 8 - 430 n/10 g TM und die im Sumatra-Küstengebiet reichen von 21 - 312 n/10 g TM. <dt.>']]
### GND ID:
['gnd:115559655', 'gnd:4006877-8', 'gnd:4047925-0', 'gnd:4062656-8', 'gnd:4147460-0', 'gnd:4170482-4', 'gnd:4178736-5', 'gnd:4425928-1', 'gnd:4660192-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856383686']
### GND class:
['Freund, Holger', 'Biomasse', 'Pyrolyse', 'Verbrennung', 'Cellulosederivate', 'Monosaccharide', 'Ruß', 'Biomarker', 'Anhydrozucker']
<|eot_id|> |
3A85644541X.jsonld | ['Design study of high-speed continuous-time delta-sigma modulator'] | ['Zusammenfassung: Continuous-time delta-sigma modulators are key components in numerous applications, e.g., communication, sensor readout and medical applications. Compared to discrete-time delta-sigma modulators, they are proven to possess inherent antialiasing functionality and have become popular for high-speed applications with bandwidth exceeding tens of MHz due to their better power efficiency. This thesis focuses on the design of continuous-time low-power low-pass delta-sigma modulators with sampling frequency over hundreds of MHz.The thesis starts with an analysis of single-stage architecture, followed by a discussion of the implementation methods of each circuit block. Based on the applicationspecific design, numerous schemes for operational amplifiers are introduced in order to reduce the power dissipation of the loop filter.Furthermore, the non-linearity of multi-bit digital-to-analog converters in deltasigma modulators is discussed. In this thesis, two approaches to mitigating the impact of this non-linearity are proposed'] | ['gnd:1091083991', 'gnd:4128359-4', 'gnd:4670553-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85644541X'] | ['Ding, Chongjun', 'Analog-Digital-Umsetzer', 'Sigma-Delta-Wandler'] | Document
### Title: ['Design study of high-speed continuous-time delta-sigma modulator']
### Abstract:
['Zusammenfassung: Continuous-time delta-sigma modulators are key components in numerous applications, e.g., communication, sensor readout and medical applications. Compared to discrete-time delta-sigma modulators, they are proven to possess inherent antialiasing functionality and have become popular for high-speed applications with bandwidth exceeding tens of MHz due to their better power efficiency. This thesis focuses on the design of continuous-time low-power low-pass delta-sigma modulators with sampling frequency over hundreds of MHz.The thesis starts with an analysis of single-stage architecture, followed by a discussion of the implementation methods of each circuit block. Based on the applicationspecific design, numerous schemes for operational amplifiers are introduced in order to reduce the power dissipation of the loop filter.Furthermore, the non-linearity of multi-bit digital-to-analog converters in deltasigma modulators is discussed. In this thesis, two approaches to mitigating the impact of this non-linearity are proposed']
### GND ID:
['gnd:1091083991', 'gnd:4128359-4', 'gnd:4670553-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85644541X']
### GND class:
['Ding, Chongjun', 'Analog-Digital-Umsetzer', 'Sigma-Delta-Wandler']
<|eot_id|> |
3A856623660.jsonld | ['Nonresponse in business tendency surveys : theoretical discourse and empirical evidence'] | [['Surveys are a widely used tool to answer socio-economic research question across disciplines. However, data collection can face certain problems such as nonresponding units. For household and population surveys, a large body of literature about the effects of nonresponse exist but only less is known in case of business surveys. This thesis deals with the missing values in the Ifo Business Survey which is conducted in similar form in nearly all OECD countries. The most prominent result of this survey is the Ifo Business Climate Index, a business cycle indicator for the German economy. This indicator is highly observed by entrepreneurs, analysts, politicians, journalists, academics and the general public. The results of this thesis show that business cycle indicators based on this type of questioning are very stable towards any kind of non-random missing data processes. This is shown by simulation studies as well as an estimation of the missing values. In particular, the missing values do not lead to a significant reduction in forecasting performance.', 'Zur Beantwortung sozioökonomischer Fragestellungen nehmen Umfragen als Methode für den empirischen Erkenntnisgewinn eine zentrale Rolle ein. Ein weitverbreitetes Problem auf der Erhebungsseite ist jedoch das Auftreten fehlender Werte, welche zu verzerrten Ergebnissen führen können. Während es für Bevölkerungs- und Haushaltsbefragungen eine umfassende Literatur zu diesem Thema existiert, ist dieses Thema im Bereich von Unternehmensbefragungen in weit geringerem Maße erforscht worden. Diese Arbeit widmet sich den fehlenden Werten im ifo Konjunkturtest, welcher in ähnlicher Form in fast allen OECD-Ländern durchgeführt wird. Das prominenteste Ergebnis dieser monatlich durchgeführten Umfrage ist der ifo Geschäftsklimaindikator, ein Konjunkturindikator für die deutsche Wirtschaft, welcher große Beachtung bei Unternehmern, Analysten, Politikern, Journalisten, Wissenschaftlern und in der breiten Öffentlichkeit findet. Die Ergebnisse dieser Arbeit zeigen, dass Konjunkturindikatoren basierend auf dieser Form der Befragung sehr stabil bezüglich nicht-zufälligen Ausfallprozessen sind. Dies lässt sich sowohl mit Hilfe von Simulationsstudien als auch durch die Schätzung der fehlenden Werte zeigen. Insbesondere führen die fehlenden Werte nicht zu einer Verschlechterung der Prognoseleistung des ifo Geschäftsklimaindikators.']] | ['gnd:141751339', 'gnd:4011882-4', 'gnd:4032125-3', 'gnd:4133974-5', 'gnd:4155272-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856623660'] | ['Seiler, Christian', 'Deutschland', 'Konjunktur', 'Non-response-Problem', 'Datenerhebung'] | Document
### Title: ['Nonresponse in business tendency surveys : theoretical discourse and empirical evidence']
### Abstract:
[['Surveys are a widely used tool to answer socio-economic research question across disciplines. However, data collection can face certain problems such as nonresponding units. For household and population surveys, a large body of literature about the effects of nonresponse exist but only less is known in case of business surveys. This thesis deals with the missing values in the Ifo Business Survey which is conducted in similar form in nearly all OECD countries. The most prominent result of this survey is the Ifo Business Climate Index, a business cycle indicator for the German economy. This indicator is highly observed by entrepreneurs, analysts, politicians, journalists, academics and the general public. The results of this thesis show that business cycle indicators based on this type of questioning are very stable towards any kind of non-random missing data processes. This is shown by simulation studies as well as an estimation of the missing values. In particular, the missing values do not lead to a significant reduction in forecasting performance.', 'Zur Beantwortung sozioökonomischer Fragestellungen nehmen Umfragen als Methode für den empirischen Erkenntnisgewinn eine zentrale Rolle ein. Ein weitverbreitetes Problem auf der Erhebungsseite ist jedoch das Auftreten fehlender Werte, welche zu verzerrten Ergebnissen führen können. Während es für Bevölkerungs- und Haushaltsbefragungen eine umfassende Literatur zu diesem Thema existiert, ist dieses Thema im Bereich von Unternehmensbefragungen in weit geringerem Maße erforscht worden. Diese Arbeit widmet sich den fehlenden Werten im ifo Konjunkturtest, welcher in ähnlicher Form in fast allen OECD-Ländern durchgeführt wird. Das prominenteste Ergebnis dieser monatlich durchgeführten Umfrage ist der ifo Geschäftsklimaindikator, ein Konjunkturindikator für die deutsche Wirtschaft, welcher große Beachtung bei Unternehmern, Analysten, Politikern, Journalisten, Wissenschaftlern und in der breiten Öffentlichkeit findet. Die Ergebnisse dieser Arbeit zeigen, dass Konjunkturindikatoren basierend auf dieser Form der Befragung sehr stabil bezüglich nicht-zufälligen Ausfallprozessen sind. Dies lässt sich sowohl mit Hilfe von Simulationsstudien als auch durch die Schätzung der fehlenden Werte zeigen. Insbesondere führen die fehlenden Werte nicht zu einer Verschlechterung der Prognoseleistung des ifo Geschäftsklimaindikators.']]
### GND ID:
['gnd:141751339', 'gnd:4011882-4', 'gnd:4032125-3', 'gnd:4133974-5', 'gnd:4155272-6', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856623660']
### GND class:
['Seiler, Christian', 'Deutschland', 'Konjunktur', 'Non-response-Problem', 'Datenerhebung']
<|eot_id|> |
3A856932140.jsonld | ['Textile production in classical Athens'] | ['Sources -- On the organisation of textile production -- Raw materials -- Thread production -- The warp-weighted loom -- Other techniques of textile production -- Decorative techniques -- Colour -- Finishing -- Terminological discussion -- Annex A: Textile catalogue -- Annex B: List of textile related terms in classical literature -- Annex C: Preliminary study of spindle-whorls -- Annex D: Preliminary study of loom-weights -- Afterword'] | ['gnd:1118627326', 'gnd:4003366-1', 'gnd:4059615-1', 'gnd:4093976-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856932140'] | ['Spantidaki, Stella', 'Athen', 'Textilien', 'Griechenland (Altertum)'] | Document
### Title: ['Textile production in classical Athens']
### Abstract:
['Sources -- On the organisation of textile production -- Raw materials -- Thread production -- The warp-weighted loom -- Other techniques of textile production -- Decorative techniques -- Colour -- Finishing -- Terminological discussion -- Annex A: Textile catalogue -- Annex B: List of textile related terms in classical literature -- Annex C: Preliminary study of spindle-whorls -- Annex D: Preliminary study of loom-weights -- Afterword']
### GND ID:
['gnd:1118627326', 'gnd:4003366-1', 'gnd:4059615-1', 'gnd:4093976-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856932140']
### GND class:
['Spantidaki, Stella', 'Athen', 'Textilien', 'Griechenland (Altertum)']
<|eot_id|> |
3A856956058.jsonld | ['Präparation und Charakterisierung polymerer Ein- und Mehrschichtsysteme als Referenzmaterialien für die Kalibrierung festkörperspektroskopischer Analysenverfahren'] | ['Referenzmaterialien, Schichtsysteme, Festkörperspektroskopie. - Reference materials, layer systems, solid state spectroscopy'] | ['gnd:4226322-0', 'gnd:4325169-9', 'gnd:4335816-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856956058'] | ['Festkörperspektroskopie', 'Schichtwerkstoff', 'ABS-Kunststoffe', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Präparation und Charakterisierung polymerer Ein- und Mehrschichtsysteme als Referenzmaterialien für die Kalibrierung festkörperspektroskopischer Analysenverfahren']
### Abstract:
['Referenzmaterialien, Schichtsysteme, Festkörperspektroskopie. - Reference materials, layer systems, solid state spectroscopy']
### GND ID:
['gnd:4226322-0', 'gnd:4325169-9', 'gnd:4335816-0', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A856956058']
### GND class:
['Festkörperspektroskopie', 'Schichtwerkstoff', 'ABS-Kunststoffe', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A85699636X.jsonld | ['From phantom blocks to denudational noise : downwearing of the Himalaya-Tibet orogen from a multi-scale perspective'] | ['Knowing the rates and mechanisms of geomorphic process that shape the Earth’s surface is crucial to understand landscape evolution. Modern methods for estimating denudation rates enable us to quantitatively express and compare processes of landscape downwearing that can be traced through time and space—from the seemingly intact, though intensely shattered, phantom blocks of the catastrophically fragmented basal facies of giant rockslides up to denudational noise in orogen-wide data sets averaging over several millennia. This great variety of spatiotemporal scales of denudation rates is both boon and bane of geomorphic process rates. Indeed, processes of landscape downwearing can be traced far back in time, helping us to understand the Earth’s evolution. Yet, this benefit may turn into a drawback due to scaling issues if these rates are to be compared across different observation timescales.This thesis investigates the mechanisms, patterns and rates of landscape downwearing across the Himalaya-Tibet orogen. Accounting for the spatio…'] | ['gnd:1081572833', 'gnd:4024923-2', 'gnd:4034348-0', 'gnd:4048009-4', 'gnd:4054080-7', 'gnd:4060036-1', 'gnd:4121648-9', 'gnd:4132462-6', 'gnd:4144662-8', 'gnd:4169027-8', 'gnd:4172850-6', 'gnd:4219356-4', 'gnd:4265837-8', 'gnd:4277253-9', 'gnd:4336660-0', 'gnd:4347197-3', 'gnd:4381339-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85699636X'] | ['Munack, Henry', 'Himalaja', 'Landschaftsentwicklung', 'Quartär', 'Sedimentation', 'Tibet', 'Sedimentologie', 'Geomorphogenese', 'Bergsturz', 'Massenbewegung (Geomorphologie)', 'Orogenese', 'Quartärgeomorphologie', 'Tektonische Geomorphologie', 'Isotopendatierung', 'Beryllium-10', 'Denudation', 'Alpidische Gebirgsbildung'] | Document
### Title: ['From phantom blocks to denudational noise : downwearing of the Himalaya-Tibet orogen from a multi-scale perspective']
### Abstract:
['Knowing the rates and mechanisms of geomorphic process that shape the Earth’s surface is crucial to understand landscape evolution. Modern methods for estimating denudation rates enable us to quantitatively express and compare processes of landscape downwearing that can be traced through time and space—from the seemingly intact, though intensely shattered, phantom blocks of the catastrophically fragmented basal facies of giant rockslides up to denudational noise in orogen-wide data sets averaging over several millennia. This great variety of spatiotemporal scales of denudation rates is both boon and bane of geomorphic process rates. Indeed, processes of landscape downwearing can be traced far back in time, helping us to understand the Earth’s evolution. Yet, this benefit may turn into a drawback due to scaling issues if these rates are to be compared across different observation timescales.This thesis investigates the mechanisms, patterns and rates of landscape downwearing across the Himalaya-Tibet orogen. Accounting for the spatio…']
### GND ID:
['gnd:1081572833', 'gnd:4024923-2', 'gnd:4034348-0', 'gnd:4048009-4', 'gnd:4054080-7', 'gnd:4060036-1', 'gnd:4121648-9', 'gnd:4132462-6', 'gnd:4144662-8', 'gnd:4169027-8', 'gnd:4172850-6', 'gnd:4219356-4', 'gnd:4265837-8', 'gnd:4277253-9', 'gnd:4336660-0', 'gnd:4347197-3', 'gnd:4381339-2', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A85699636X']
### GND class:
['Munack, Henry', 'Himalaja', 'Landschaftsentwicklung', 'Quartär', 'Sedimentation', 'Tibet', 'Sedimentologie', 'Geomorphogenese', 'Bergsturz', 'Massenbewegung (Geomorphologie)', 'Orogenese', 'Quartärgeomorphologie', 'Tektonische Geomorphologie', 'Isotopendatierung', 'Beryllium-10', 'Denudation', 'Alpidische Gebirgsbildung']
<|eot_id|> |
3A857478095.jsonld | ['Destination image, tourist satisfaction and destination loyalty : a case study of Hue, Vietnam'] | [['Several studies have confirmed the interrelationship among destination image, tourist satisfaction and destination loyalty, in which destination image and tourist satisfaction are believed to have great influences on the destination loyalty of tourists. Located in the central region of Vietnam, Hue holds great potential for tourism development and this destination has also obtained numerous significant tourism achievements over recent years.Nevertheless, there are still a lot of issues needed to be addressed by the destination managers in order to make Hue gain a better position and higher level of destination loyalty in the tourism market, in which successfully communicating an attractive destination image to the tourists and improving their satisfaction are the most important tasks. In fact, there exist very few researches concerning destination image, tourist satisfaction or even destination loyalty which have been done in Hue. Moreover, most of these studies are in very small scale and they only examine either the destination image or the tourist satisfaction or the destination loyalty independently. This paper, therefore, aims to deliver the first and comprehensive theoretical and empirical analysis of destination image, tourist satisfaction and destination loyalty as well as the causal relationship among them in the context of Hue. In this study, a destination loyalty research model was proposed and hypotheses were derived. The empirical data base on two tourist surveys ...', 'Tourismus, Vietnam, tourism, destination image, tourist satisfaction, destination loyalty, Hue, Vietnam']] | ['gnd:1098314093', 'gnd:36158-6', 'gnd:4018406-7', 'gnd:4063514-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A857478095'] | ['Tran, Thi Ngoc Lien', 'Ernst-Moritz-Arndt-Universität Greifswald', 'Tourismus', 'Vietnam'] | Document
### Title: ['Destination image, tourist satisfaction and destination loyalty : a case study of Hue, Vietnam']
### Abstract:
[['Several studies have confirmed the interrelationship among destination image, tourist satisfaction and destination loyalty, in which destination image and tourist satisfaction are believed to have great influences on the destination loyalty of tourists. Located in the central region of Vietnam, Hue holds great potential for tourism development and this destination has also obtained numerous significant tourism achievements over recent years.Nevertheless, there are still a lot of issues needed to be addressed by the destination managers in order to make Hue gain a better position and higher level of destination loyalty in the tourism market, in which successfully communicating an attractive destination image to the tourists and improving their satisfaction are the most important tasks. In fact, there exist very few researches concerning destination image, tourist satisfaction or even destination loyalty which have been done in Hue. Moreover, most of these studies are in very small scale and they only examine either the destination image or the tourist satisfaction or the destination loyalty independently. This paper, therefore, aims to deliver the first and comprehensive theoretical and empirical analysis of destination image, tourist satisfaction and destination loyalty as well as the causal relationship among them in the context of Hue. In this study, a destination loyalty research model was proposed and hypotheses were derived. The empirical data base on two tourist surveys ...', 'Tourismus, Vietnam, tourism, destination image, tourist satisfaction, destination loyalty, Hue, Vietnam']]
### GND ID:
['gnd:1098314093', 'gnd:36158-6', 'gnd:4018406-7', 'gnd:4063514-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A857478095']
### GND class:
['Tran, Thi Ngoc Lien', 'Ernst-Moritz-Arndt-Universität Greifswald', 'Tourismus', 'Vietnam']
<|eot_id|> |
3A857549022.jsonld | ['Studien zum stereoselektiven Aufbau quartärer Stereozentren über asymmetrische Cyclopropanierung elektronenreicher Heterocyclen mit Hilfe von Kohlenhydrat-Bis(oxazolinen)'] | ['Asymmetrische Synthese, Bis(oxazoline), Kohlenhydrate, Ligandendesign, Indole, Naturstoffsynthese. - Asymmetric synthesis, bis(oxazolines), carbohydrates, ligand design, indols, natural product synthesis'] | ['gnd:110287320', 'gnd:124511023', 'gnd:4133689-6', 'gnd:4135603-2', 'gnd:4221170-0', 'gnd:4282793-0', 'gnd:4298728-3', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A857549022'] | ['Butenschön, Holger', 'Boysen, Mike M. K.', 'Spiroverbindungen', 'Asymmetrische Synthese', 'Cyclopropanierung', 'Tetrahydrocarbazole', 'Indolinderivate', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['Studien zum stereoselektiven Aufbau quartärer Stereozentren über asymmetrische Cyclopropanierung elektronenreicher Heterocyclen mit Hilfe von Kohlenhydrat-Bis(oxazolinen)']
### Abstract:
['Asymmetrische Synthese, Bis(oxazoline), Kohlenhydrate, Ligandendesign, Indole, Naturstoffsynthese. - Asymmetric synthesis, bis(oxazolines), carbohydrates, ligand design, indols, natural product synthesis']
### GND ID:
['gnd:110287320', 'gnd:124511023', 'gnd:4133689-6', 'gnd:4135603-2', 'gnd:4221170-0', 'gnd:4282793-0', 'gnd:4298728-3', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A857549022']
### GND class:
['Butenschön, Holger', 'Boysen, Mike M. K.', 'Spiroverbindungen', 'Asymmetrische Synthese', 'Cyclopropanierung', 'Tetrahydrocarbazole', 'Indolinderivate', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A857554905.jsonld | ['Magnetotelluric measurements across the southern Barberton Greenstone Belt, South Africa'] | ['The Barberton Greenstone Belt (BGB) in the northwestern part of South Africa belongs to the few well-preserved remnants of Archean crust. Over the last centuries, the BGB has been intensively studied at surface with detailed mapping of its surfacial geological units and tectonic features. Nevertheless, the deeper structure of the BGB remains poorly understood. Various tectonic evolution models have been developed based on geo-chronological and structural data. These theories are highly controversial and centre on the question whether plate tectonics - as geoscientists understand them today - was already evolving on the Early Earth or whether vertical mass movements driven by the higher temperature of the Earth in Archean times governed continent development. To get a step closer to answering the questions regarding the internal structure and formation of the BGB, magnetotelluric (MT) field experiments were conducted as part of the German-South African research initiative Inkaba yeAfrica. Five-component MT data (three magnetic and two electric channels) were collected at ~200 sites aligned along six profiles crossing the southern part of the BGB. Tectonic features like (fossil) faults and shear zones are often mineralized and therefore can have high electrical conductivities. Hence, by obtaining an image of the conductivity distribution of the subsurface from MT measurements can provide useful information on tectonic processes. Unfortunately, the BGB MT data set is heavily affected by man-made electromagnetic noise caused, e.g. by powerlines and electric fences. Aperiodic spikes in the magnetic and corresponding offsets in the electric field components impair the data quality particularly at periods >1 s which are required to image deep electrical structures. Application of common methods for noise reduction like delay filtering and remote reference processing, only worked well for periods <1 s. Within the framework of this thesis two new filtering approaches were developed to handle the severe noise in long period data and obtain reliable processing results. The first algorithm is based on the Wiener filter in combination with a spike detection algorithm. Comparison of data variances of a local site with those of a reference site allows the identification of disturbed time series windows for each recorded channel at the local site. Using the data of the reference site, a Wiener filter algorithm is applied to predict physically meaningful data to replace the disturbed windows. While spikes in the magnetic channels are easily recognized and replaced, steps in the electric channels are more difficult to detect depending on their offset. Therefore, I have implemented a novel approach based on time series differentiation, noise removal and subsequent integration to overcome this obstacle. A second filtering approach where spikes and steps in the time series are identified using a comparison of the short and long time average of the data was also implemented as part of my thesis. For this filtering approach the noise in the form of spikes and offsets in the data is treated by an interpolation of the affected data samples. The new developments resulted in a substantial data improvement and allowed to gain one to two decades of data (up to 10 or 100 s). The re-processed MT data were used to image the electrical conductivity distribution of the BGB by 2D and 3D inversion. Inversion models are in good agreement with the surface geology delineating the highly resistive rocks of the BGB from surrounding more conductive geological units. Fault zones appear as conductive structures and can be traced to depths of 5 to 10 km. 2D models suggest a continuation of the faults further south across the boundary of the BGB. Based on the shallow tectonic structures (fault system) within the BGB compared to deeply rooted resistive batholiths in the area, tectonic models including both vertical mass transport and in parts present-day style plate tectonics seem to be most likely for the evolution of the BGB.'] | ['gnd:1098339185', 'gnd:4014200-0', 'gnd:4038971-6', 'gnd:4078012-0', 'gnd:4123037-1', 'gnd:4131193-0', 'gnd:4154388-9', 'gnd:4168603-2', 'gnd:4210217-0', 'gnd:4254969-3', 'gnd:4278975-8', 'gnd:4338549-7', 'gnd:4342450-8', 'gnd:4346895-0', 'gnd:4470959-6', 'gnd:4483774-4', 'gnd:4529179-2', 'gnd:4589361-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A857554905'] | ['Kütter, Sissy', 'Elektrische Leitfähigkeit', 'Methode', 'Südafrika', 'Datenanalyse', 'Datenauswertung', 'Filter (Mathematik)', 'Magnetotellurik', 'Störsignal', 'Metabasit', 'Archaikum (Geologie)', 'Grünstein', 'Elektromagnetische Messung', 'Grünsteingürtel', 'Elektromagnetische Tiefensondierung', 'Tiefenstruktur (Geologie)', 'Elektromagnetisches Verfahren', 'Barberton Greenstone Belt'] | Document
### Title: ['Magnetotelluric measurements across the southern Barberton Greenstone Belt, South Africa']
### Abstract:
['The Barberton Greenstone Belt (BGB) in the northwestern part of South Africa belongs to the few well-preserved remnants of Archean crust. Over the last centuries, the BGB has been intensively studied at surface with detailed mapping of its surfacial geological units and tectonic features. Nevertheless, the deeper structure of the BGB remains poorly understood. Various tectonic evolution models have been developed based on geo-chronological and structural data. These theories are highly controversial and centre on the question whether plate tectonics - as geoscientists understand them today - was already evolving on the Early Earth or whether vertical mass movements driven by the higher temperature of the Earth in Archean times governed continent development. To get a step closer to answering the questions regarding the internal structure and formation of the BGB, magnetotelluric (MT) field experiments were conducted as part of the German-South African research initiative Inkaba yeAfrica. Five-component MT data (three magnetic and two electric channels) were collected at ~200 sites aligned along six profiles crossing the southern part of the BGB. Tectonic features like (fossil) faults and shear zones are often mineralized and therefore can have high electrical conductivities. Hence, by obtaining an image of the conductivity distribution of the subsurface from MT measurements can provide useful information on tectonic processes. Unfortunately, the BGB MT data set is heavily affected by man-made electromagnetic noise caused, e.g. by powerlines and electric fences. Aperiodic spikes in the magnetic and corresponding offsets in the electric field components impair the data quality particularly at periods >1 s which are required to image deep electrical structures. Application of common methods for noise reduction like delay filtering and remote reference processing, only worked well for periods <1 s. Within the framework of this thesis two new filtering approaches were developed to handle the severe noise in long period data and obtain reliable processing results. The first algorithm is based on the Wiener filter in combination with a spike detection algorithm. Comparison of data variances of a local site with those of a reference site allows the identification of disturbed time series windows for each recorded channel at the local site. Using the data of the reference site, a Wiener filter algorithm is applied to predict physically meaningful data to replace the disturbed windows. While spikes in the magnetic channels are easily recognized and replaced, steps in the electric channels are more difficult to detect depending on their offset. Therefore, I have implemented a novel approach based on time series differentiation, noise removal and subsequent integration to overcome this obstacle. A second filtering approach where spikes and steps in the time series are identified using a comparison of the short and long time average of the data was also implemented as part of my thesis. For this filtering approach the noise in the form of spikes and offsets in the data is treated by an interpolation of the affected data samples. The new developments resulted in a substantial data improvement and allowed to gain one to two decades of data (up to 10 or 100 s). The re-processed MT data were used to image the electrical conductivity distribution of the BGB by 2D and 3D inversion. Inversion models are in good agreement with the surface geology delineating the highly resistive rocks of the BGB from surrounding more conductive geological units. Fault zones appear as conductive structures and can be traced to depths of 5 to 10 km. 2D models suggest a continuation of the faults further south across the boundary of the BGB. Based on the shallow tectonic structures (fault system) within the BGB compared to deeply rooted resistive batholiths in the area, tectonic models including both vertical mass transport and in parts present-day style plate tectonics seem to be most likely for the evolution of the BGB.']
### GND ID:
['gnd:1098339185', 'gnd:4014200-0', 'gnd:4038971-6', 'gnd:4078012-0', 'gnd:4123037-1', 'gnd:4131193-0', 'gnd:4154388-9', 'gnd:4168603-2', 'gnd:4210217-0', 'gnd:4254969-3', 'gnd:4278975-8', 'gnd:4338549-7', 'gnd:4342450-8', 'gnd:4346895-0', 'gnd:4470959-6', 'gnd:4483774-4', 'gnd:4529179-2', 'gnd:4589361-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A857554905']
### GND class:
['Kütter, Sissy', 'Elektrische Leitfähigkeit', 'Methode', 'Südafrika', 'Datenanalyse', 'Datenauswertung', 'Filter (Mathematik)', 'Magnetotellurik', 'Störsignal', 'Metabasit', 'Archaikum (Geologie)', 'Grünstein', 'Elektromagnetische Messung', 'Grünsteingürtel', 'Elektromagnetische Tiefensondierung', 'Tiefenstruktur (Geologie)', 'Elektromagnetisches Verfahren', 'Barberton Greenstone Belt']
<|eot_id|> |
3A858175274.jsonld | ['Cloning of the plant development regulatory genes MANY NODED DWARF (MND) and LAXATUM-A (LAX-A) by taking advantage of an improved barley genomics infrastructure'] | [['Spike architecture; Barley; Plant development; Map-based cloning; Natural diversity; Next Generation Sequencing; Mapping-by-sequencing; Mutant collections', 'Ährenentwicklung; Gerste; Pflanzenarchitektur; Kartengestützte Isolierung; Natürliche Diversität; Sequenzierung; Kartierung durch Sequenzierung; Mutantenkollektionen', 'Optimizing plant architecture is one major target towards increasing yield potential of crop plants. To identify underlying genes regulating plant growth is one major requirement to understand and intervene towards breeding plants with improved plant architecture. This study describes the identification and characterization of the genes MANY NODED DWARF (MND) und LAXATUM-A (LAX-A), which are important growth regulators of barley plant architecture. Mutant mnd plants have, in comparison to wild-type plants, a faster leaf initiation (shortened plastochron) and a dwarf growth habit. The lax-a mutant plants exhibit pleiotropic changes in the spike architecture. It was aimed to improve the gene isolation procedure in barley by using modern sequence techniques and available genomic resources. The two genes, localized in genomic environments with strong differences in recombination frequency, delivered beneficial insights for future gene isolation studies.', 'Die Optimierung der Pflanzenarchitektur ist ein Ansatz um zukünftig höhere Erträge von Kulturpflanzen zu erzielen. Die Identifikation von Genen, welche für die Merkmalsausprägung des Pflanzenwachstums verantwortlich sind, ist eine Grundvoraussetzung um eine gezielte Züchtung der Pflanzenarchitektur zu ermöglichen. Diese Arbeit beschreibt die Identifikation und Charakterisierung der Gene MANY NODED DWARF (MND) und LAXATUM-A (LAX-A), welche wichtige Regulatoren für die Pflanzenarchitektur der Gerste sind. Mutanten mnd Pflanzen zeigen, im Gegensatz zu herkömmlichen Wild-typ Pflanzen, eine schnellere Blattanlage (verkürztes „Plastochron“) und ein verzwergtes Wachstum auf. Die lax-a Mutanten zeigen hingegen pleiotrope Veränderungen in der Ähre. Es wurde eine Verbesserung der Isolation von Genen in der Gerste angestrebt. Durch den Einsatz modernster Sequenziertechniken und verfügbaren genomischen Ressourcen konnten anhand der zwei Gene, welche in Regionen mit stark unterschiedlichen Rekombinationshäufigkeiten liegen, neue Erkenntnisse für zukünftige Genidentifikationen geliefert werden.']] | ['gnd:2024276-1', 'gnd:4156898-9', 'gnd:4157211-7', 'gnd:4203071-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858175274'] | ['Martin-Luther-Universität Halle-Wittenberg', 'Gerste', 'Getreidezüchtung', 'Ähre'] | Document
### Title: ['Cloning of the plant development regulatory genes MANY NODED DWARF (MND) and LAXATUM-A (LAX-A) by taking advantage of an improved barley genomics infrastructure']
### Abstract:
[['Spike architecture; Barley; Plant development; Map-based cloning; Natural diversity; Next Generation Sequencing; Mapping-by-sequencing; Mutant collections', 'Ährenentwicklung; Gerste; Pflanzenarchitektur; Kartengestützte Isolierung; Natürliche Diversität; Sequenzierung; Kartierung durch Sequenzierung; Mutantenkollektionen', 'Optimizing plant architecture is one major target towards increasing yield potential of crop plants. To identify underlying genes regulating plant growth is one major requirement to understand and intervene towards breeding plants with improved plant architecture. This study describes the identification and characterization of the genes MANY NODED DWARF (MND) und LAXATUM-A (LAX-A), which are important growth regulators of barley plant architecture. Mutant mnd plants have, in comparison to wild-type plants, a faster leaf initiation (shortened plastochron) and a dwarf growth habit. The lax-a mutant plants exhibit pleiotropic changes in the spike architecture. It was aimed to improve the gene isolation procedure in barley by using modern sequence techniques and available genomic resources. The two genes, localized in genomic environments with strong differences in recombination frequency, delivered beneficial insights for future gene isolation studies.', 'Die Optimierung der Pflanzenarchitektur ist ein Ansatz um zukünftig höhere Erträge von Kulturpflanzen zu erzielen. Die Identifikation von Genen, welche für die Merkmalsausprägung des Pflanzenwachstums verantwortlich sind, ist eine Grundvoraussetzung um eine gezielte Züchtung der Pflanzenarchitektur zu ermöglichen. Diese Arbeit beschreibt die Identifikation und Charakterisierung der Gene MANY NODED DWARF (MND) und LAXATUM-A (LAX-A), welche wichtige Regulatoren für die Pflanzenarchitektur der Gerste sind. Mutanten mnd Pflanzen zeigen, im Gegensatz zu herkömmlichen Wild-typ Pflanzen, eine schnellere Blattanlage (verkürztes „Plastochron“) und ein verzwergtes Wachstum auf. Die lax-a Mutanten zeigen hingegen pleiotrope Veränderungen in der Ähre. Es wurde eine Verbesserung der Isolation von Genen in der Gerste angestrebt. Durch den Einsatz modernster Sequenziertechniken und verfügbaren genomischen Ressourcen konnten anhand der zwei Gene, welche in Regionen mit stark unterschiedlichen Rekombinationshäufigkeiten liegen, neue Erkenntnisse für zukünftige Genidentifikationen geliefert werden.']]
### GND ID:
['gnd:2024276-1', 'gnd:4156898-9', 'gnd:4157211-7', 'gnd:4203071-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858175274']
### GND class:
['Martin-Luther-Universität Halle-Wittenberg', 'Gerste', 'Getreidezüchtung', 'Ähre']
<|eot_id|> |
3A858177218.jsonld | ['Utilization of the Ugi four-component reaction for the synthesis of lipophilic peptidomimetics as potential antimicrobials'] | [['The lipopeptoid-peptide chimera (LPP) substance library, synthesized by consecutive Ugi four-component reactions (U-4CR), is comprised of derivatives from formic acid (C1) to arachidic acid (C20). A further derivatization of the LPPs with a fluorescent dye a/o guanididium moieties and the dimerization of larger LPP fragments with a small diisocyanide was additionally accomplished. A facile 24 h-luminescence assay, based on gram-negative luminescent bacteria Aliivibrio fischeri, was developed. In combination with the new 2D-heatmap plot, a quick distinction between acute toxic and chronic antibacterial compounds can be made. Several LPPs showed promising antimicrobial activity with IC50 values in the range of 1 μM and 10 μM in this and other bioassays against different microorganisms like Bacillus subtilis, Septoria tritici, Botrytis cinerea and Phytophtora infestans.', 'Multikomponentenreaktion; MCR; Ugi-Reaktion; Lipopeptid; Peptoid; Peptidmimetika; Fettsäure; Aliivibrio fischeri; Biotest', 'multi-component reaction; MCR; Ugi reaction; lipopeptide; peptoid; peptidomimetic; fatty acid; Aliivibrio fischeri; bioassay', 'Die durch sequentielle Ugi-Vierkomponenten-Reaktionen (U-4CR) synthetisierte Substanzbibliothek aus Lipo-Peptoid-Peptid-Chimären (LPPs) besteht aus den Derivaten von Ameisensäure (C1) bis Arachinsäure (C20). Eine Derivatisierung der LPPs mit einem Fluoreszenzfarbstoff sowie die Einführung von Guanidin-Seitenketten konnte ebenso erreicht werden wie die Dimerisierung größerer LPP-Fragmente durch ein kleines Diisocyanid. Durch einen selbstentwickelten, einfach durchzuführenden 24-Stunden-Lumineszenzassay auf Basis des gram-negativen Leuchtbakteriums Aliivibrio fischeri und die hier erstmals präsentierten 2D-Heatmaps ist es möglich, akut-toxische von chronisch antibakteriellen Substanzen zu unterscheiden. Viele LPPs zeigten in diesem und weiteren Tests gegen andere Mikroorganismen (Bacillus subtilis, Septoria tritici, Botrytis cinerea, Phytophtora infestans) eine vielversprechende antimikrobielle Aktivität mit IC50-Werten zwischen 1 μM und 10 μM.']] | ['gnd:2024276-1', 'gnd:4002257-2', 'gnd:4186673-3', 'gnd:4253775-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858177218'] | ['Martin-Luther-Universität Halle-Wittenberg', 'Antibiotikum', 'Ugi-Reaktion', 'Lipopeptide'] | Document
### Title: ['Utilization of the Ugi four-component reaction for the synthesis of lipophilic peptidomimetics as potential antimicrobials']
### Abstract:
[['The lipopeptoid-peptide chimera (LPP) substance library, synthesized by consecutive Ugi four-component reactions (U-4CR), is comprised of derivatives from formic acid (C1) to arachidic acid (C20). A further derivatization of the LPPs with a fluorescent dye a/o guanididium moieties and the dimerization of larger LPP fragments with a small diisocyanide was additionally accomplished. A facile 24 h-luminescence assay, based on gram-negative luminescent bacteria Aliivibrio fischeri, was developed. In combination with the new 2D-heatmap plot, a quick distinction between acute toxic and chronic antibacterial compounds can be made. Several LPPs showed promising antimicrobial activity with IC50 values in the range of 1 μM and 10 μM in this and other bioassays against different microorganisms like Bacillus subtilis, Septoria tritici, Botrytis cinerea and Phytophtora infestans.', 'Multikomponentenreaktion; MCR; Ugi-Reaktion; Lipopeptid; Peptoid; Peptidmimetika; Fettsäure; Aliivibrio fischeri; Biotest', 'multi-component reaction; MCR; Ugi reaction; lipopeptide; peptoid; peptidomimetic; fatty acid; Aliivibrio fischeri; bioassay', 'Die durch sequentielle Ugi-Vierkomponenten-Reaktionen (U-4CR) synthetisierte Substanzbibliothek aus Lipo-Peptoid-Peptid-Chimären (LPPs) besteht aus den Derivaten von Ameisensäure (C1) bis Arachinsäure (C20). Eine Derivatisierung der LPPs mit einem Fluoreszenzfarbstoff sowie die Einführung von Guanidin-Seitenketten konnte ebenso erreicht werden wie die Dimerisierung größerer LPP-Fragmente durch ein kleines Diisocyanid. Durch einen selbstentwickelten, einfach durchzuführenden 24-Stunden-Lumineszenzassay auf Basis des gram-negativen Leuchtbakteriums Aliivibrio fischeri und die hier erstmals präsentierten 2D-Heatmaps ist es möglich, akut-toxische von chronisch antibakteriellen Substanzen zu unterscheiden. Viele LPPs zeigten in diesem und weiteren Tests gegen andere Mikroorganismen (Bacillus subtilis, Septoria tritici, Botrytis cinerea, Phytophtora infestans) eine vielversprechende antimikrobielle Aktivität mit IC50-Werten zwischen 1 μM und 10 μM.']]
### GND ID:
['gnd:2024276-1', 'gnd:4002257-2', 'gnd:4186673-3', 'gnd:4253775-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858177218']
### GND class:
['Martin-Luther-Universität Halle-Wittenberg', 'Antibiotikum', 'Ugi-Reaktion', 'Lipopeptide']
<|eot_id|> |
3A858774682.jsonld | ['Food and nutrition insecurity risk mapping (FNIRM) in urban and periurban areas in West African cities (Tamale and Ouagadougou)'] | ['Zusammenfassung: Food and nutrition insecurity remains a global challenge, with sub-Saharan Africa bearing a large share of this burden. Women, mostly of reproductive age (15 – 49 years) and children under five years are at the pinnacle of this problem. It has traditionally been looked at as a problem of rural areas taking in consideration that urban households are better placed than their rural counterparts in terms of infrastructure, especially in sub-Saharan Africa. Nevertheless, recent trends in this region show more evidence of rising urban poverty, in the midst of growing cities and looming food shortages. These challenges of food and nutrition insecurity in and around cities lead urban dwellers to engage in farming activities to help satisfy their food needs. The global share of African urban dwellers is projected to rise from 11.3 % in 2010 to a 20.2 % by 2050, further increasing urban food demand. Although many studies have reported on food and nutrition insecurity and its interaction with agriculture, little is known, however, about how this differs between multiple locations along the urban - rural continuum. The urban – rural continuum approach enhances formulation of efficient urban sustainability policies as it is inclusive and addresses sustainability in areas large enough to encompass urban, periurban and rural areas unlike other approaches which focus on the dichotomy between urban and rural areas. Information on spatial variation of household food and nutrition insecurity can be very useful in understanding its dynamics in various locations and help in resource allocation and proper intervention targeting.The primary objective of the study was to understand and map the dynamics of household food and nutrition insecurity in urban, periurban and rural settings. The study was conducted along the urban - rural continuum of two sub-Saharan African cities; in Tamale (Ghana) and Ouagadougou (Burkina Faso). Furthermore, the role played by urban, periurban and rural agriculture was investigated.The study used a mixed method approach, with a transect approach building the foundation for data collection. Transects, 2 km wide and 70 km from Ouagadougou and Tamale central markets, were laid radially. Based on the relevant literature, working definitions of urban, periurban and rural areas were established. Within 10 km of the city centre was considered as urban, between 10 km to 40 km as periurban, and between 40 to 70 km as rural. All households ...'] | ['gnd:1088440398', 'gnd:3001770-1', 'gnd:4034402-2', 'gnd:4044209-3', 'gnd:4152826-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858774682'] | ['Chagomoka, Takemore', 'Tamale', 'Landwirtschaft', 'Ouagadougou', 'Ernährungssicherung'] | Document
### Title: ['Food and nutrition insecurity risk mapping (FNIRM) in urban and periurban areas in West African cities (Tamale and Ouagadougou)']
### Abstract:
['Zusammenfassung: Food and nutrition insecurity remains a global challenge, with sub-Saharan Africa bearing a large share of this burden. Women, mostly of reproductive age (15 – 49 years) and children under five years are at the pinnacle of this problem. It has traditionally been looked at as a problem of rural areas taking in consideration that urban households are better placed than their rural counterparts in terms of infrastructure, especially in sub-Saharan Africa. Nevertheless, recent trends in this region show more evidence of rising urban poverty, in the midst of growing cities and looming food shortages. These challenges of food and nutrition insecurity in and around cities lead urban dwellers to engage in farming activities to help satisfy their food needs. The global share of African urban dwellers is projected to rise from 11.3 % in 2010 to a 20.2 % by 2050, further increasing urban food demand. Although many studies have reported on food and nutrition insecurity and its interaction with agriculture, little is known, however, about how this differs between multiple locations along the urban - rural continuum. The urban – rural continuum approach enhances formulation of efficient urban sustainability policies as it is inclusive and addresses sustainability in areas large enough to encompass urban, periurban and rural areas unlike other approaches which focus on the dichotomy between urban and rural areas. Information on spatial variation of household food and nutrition insecurity can be very useful in understanding its dynamics in various locations and help in resource allocation and proper intervention targeting.The primary objective of the study was to understand and map the dynamics of household food and nutrition insecurity in urban, periurban and rural settings. The study was conducted along the urban - rural continuum of two sub-Saharan African cities; in Tamale (Ghana) and Ouagadougou (Burkina Faso). Furthermore, the role played by urban, periurban and rural agriculture was investigated.The study used a mixed method approach, with a transect approach building the foundation for data collection. Transects, 2 km wide and 70 km from Ouagadougou and Tamale central markets, were laid radially. Based on the relevant literature, working definitions of urban, periurban and rural areas were established. Within 10 km of the city centre was considered as urban, between 10 km to 40 km as periurban, and between 40 to 70 km as rural. All households ...']
### GND ID:
['gnd:1088440398', 'gnd:3001770-1', 'gnd:4034402-2', 'gnd:4044209-3', 'gnd:4152826-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858774682']
### GND class:
['Chagomoka, Takemore', 'Tamale', 'Landwirtschaft', 'Ouagadougou', 'Ernährungssicherung']
<|eot_id|> |
3A858918455.jsonld | ['A modified adaptive harmony search algorithm approach on structural identification and damage detection'] | ['Optimization algorithms, harmony search, structural identification, damage detection, output-only, search space reduction, FAST, offshore, onshore, wind turbine supporting structures, model reduction. - Optimierungsalgorithmen, Strukturidentifikation, Schadensfrüherkennung, Suchraumreduktion, Tragstrukturen von Windturbinen, Modellreduktion'] | ['gnd:1068647728', 'gnd:1106113284', 'gnd:113094620', 'gnd:4001183-5', 'gnd:4047390-9', 'gnd:4189962-3', 'gnd:4284135-5', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858918455'] | ['Rolfes, Raimund', 'Jahjouh, Mahmoud M.', 'Nackenhorst, Udo', 'Algorithmus', 'Prognose', 'Windturbine', 'Werkstoffschädigung', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['A modified adaptive harmony search algorithm approach on structural identification and damage detection']
### Abstract:
['Optimization algorithms, harmony search, structural identification, damage detection, output-only, search space reduction, FAST, offshore, onshore, wind turbine supporting structures, model reduction. - Optimierungsalgorithmen, Strukturidentifikation, Schadensfrüherkennung, Suchraumreduktion, Tragstrukturen von Windturbinen, Modellreduktion']
### GND ID:
['gnd:1068647728', 'gnd:1106113284', 'gnd:113094620', 'gnd:4001183-5', 'gnd:4047390-9', 'gnd:4189962-3', 'gnd:4284135-5', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A858918455']
### GND class:
['Rolfes, Raimund', 'Jahjouh, Mahmoud M.', 'Nackenhorst, Udo', 'Algorithmus', 'Prognose', 'Windturbine', 'Werkstoffschädigung', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A859171671.jsonld | ['Investigations of the potential of synthetic phospholipids as membrane mimics : interactions with amphiphilic and polyphilic block copolymers'] | [['Interactions of amphiphilic and polyphilic block copolymers based on hydrophilic poly(glycero monomethacrylate) blocks, hydrophobic poly(propylene oxide) and perfluorinated alkyl segments were studied with DPPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine) derivatives, including amonofluorinated lipid F-DPPC(1-palmitoyl-2-(16-fluoropalmitoyl)-sn-glycero-3-phosphocholine), an ether analogue DHPC(1,2-di-O-hexadecyl-sn-glycero-3-phosphocholine) and acationic lipid EDPPC (1,2-dipalmitoyl-sn-glycero-3-ethylphosphocholine).The monolayer behavior of modified lipids was different from that of DPPC. The Liquid expanded (LE) to liquid condensed (LC) phase transition took place at higher surface pressures compared to DPPC and LC-domains visualized by epifluorescence microscopy had fractal growth, indicating the dominance of electrostatic dipolar forces in the monolayers. With the exception of cholesterol linked polymer, the aggregation of lipids was hindered in the mixtures containing low proportions of all polymers and facilitated when polymer content exceeded 5%. The cryo-electron microscopy and differential scanning calorimetric investigations revealed the temperature driven fusion of interdigitated lipid vesicles. All polymers induced defects in the interdigitated gel phase of lipids, resulting in the broadening or splitting of melting and crystallization transitions.', 'Es wurden die Wechselwirkungen von amphiphilen und polyphilen Block-Copolymeren mit Derivaten des Lipides 1,2-Dipalmitoyl-sn-glycero-3-phosphocholin (DPPC) untersucht. Die Block-Copolymere bestanden aus hydrophilen Poly(Glyceromonomethacrylat)-Blöcken, hydrophoben Poly(Propylenoxid)-Blöcken sowie perfluorierten Alkylkettensegmenten (F9) in unterschiedlicher Anordnung. Als Derivate von DPPC dienten das monofluorierte 1-palmitoyl-2-(16-fluoro palmitoyl)-sn-glycero-3-phosphocholin(F-DPPC), das Ether-Analogon 1,2-Di-O-hexadecyl-sn-glycero-3-phosphocholin(DHPC) sowie das kationische Lipid1,2-Dipalmitoyl-sn-glycero-3-ethylphosphocholin (EDPPC). Die modifizierten Lipide zeigten ein verändertes Verhalten der Lipid-Monoschicht an der Luft-Wasser Grenzfläche. Im Vergleich zu DPPC war die Phasenumwandlung vom flüssig-expandierten (LE) zum flüssig-kondensierten (LC) Zustand erst bei höheren Oberflächendrücken zu finden. Die mittels Fluoreszenzmikroskopie aufgenommenen Domänen der flüssig-kondensierten Phase zeigten ein fraktales Wachstum, woraus auf eine Dominanz elektrostatischer Dipol-Kräfte in der Monoschicht geschlossen wird. Die Aggregation der Lipide wurde durch das Vorhandensein der Copolymere behindert, außer bei dem Copolymer mit angeknüpftem Cholesterol. Die Zumischung von mehr als 5% Copolymer begünstigte die Bildung von Lipid-Domänen. Die temperatur-getriebene Fusion von interdigitierten Lipidvesikeln wurde mittels Cryo-Elektronenmikroskopie und Differential Scanning Calorimetry aufgeklärt. Alle Copolymere induzierten Defekte in der Struktur der interdigitierten Gelphase der Lipide. Dies hat zur Folge, dass die Schmelz- und Kristallisationstemperaturen sich verbreiterten oder sogar aufgespalten wurden.', 'F-DPPC; DHPC; EDPPC; amphiphilic block copolymers; polyphilic block copolymers; epifluorescence microscopy; differential scanning calorimetry; cryo-electron microscopy; Langmuir monolayers; Gibbs monolayers', 'F-DPPC; DHPC; EDPPC; Amphiphile Block-Copolymere; Polyphile Block-Copolymere; Fluoreszenzmikroskopie; Differential Scanning Calorimetry; Cryo-Elektronenmikroskopie; Langmuir Monolayer; Gibbs Monolayer']] | ['gnd:2024276-1', 'gnd:4132140-6', 'gnd:4146026-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859171671'] | ['Martin-Luther-Universität Halle-Wittenberg', 'Phasenumwandlung', 'Blockcopolymere'] | Document
### Title: ['Investigations of the potential of synthetic phospholipids as membrane mimics : interactions with amphiphilic and polyphilic block copolymers']
### Abstract:
[['Interactions of amphiphilic and polyphilic block copolymers based on hydrophilic poly(glycero monomethacrylate) blocks, hydrophobic poly(propylene oxide) and perfluorinated alkyl segments were studied with DPPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine) derivatives, including amonofluorinated lipid F-DPPC(1-palmitoyl-2-(16-fluoropalmitoyl)-sn-glycero-3-phosphocholine), an ether analogue DHPC(1,2-di-O-hexadecyl-sn-glycero-3-phosphocholine) and acationic lipid EDPPC (1,2-dipalmitoyl-sn-glycero-3-ethylphosphocholine).The monolayer behavior of modified lipids was different from that of DPPC. The Liquid expanded (LE) to liquid condensed (LC) phase transition took place at higher surface pressures compared to DPPC and LC-domains visualized by epifluorescence microscopy had fractal growth, indicating the dominance of electrostatic dipolar forces in the monolayers. With the exception of cholesterol linked polymer, the aggregation of lipids was hindered in the mixtures containing low proportions of all polymers and facilitated when polymer content exceeded 5%. The cryo-electron microscopy and differential scanning calorimetric investigations revealed the temperature driven fusion of interdigitated lipid vesicles. All polymers induced defects in the interdigitated gel phase of lipids, resulting in the broadening or splitting of melting and crystallization transitions.', 'Es wurden die Wechselwirkungen von amphiphilen und polyphilen Block-Copolymeren mit Derivaten des Lipides 1,2-Dipalmitoyl-sn-glycero-3-phosphocholin (DPPC) untersucht. Die Block-Copolymere bestanden aus hydrophilen Poly(Glyceromonomethacrylat)-Blöcken, hydrophoben Poly(Propylenoxid)-Blöcken sowie perfluorierten Alkylkettensegmenten (F9) in unterschiedlicher Anordnung. Als Derivate von DPPC dienten das monofluorierte 1-palmitoyl-2-(16-fluoro palmitoyl)-sn-glycero-3-phosphocholin(F-DPPC), das Ether-Analogon 1,2-Di-O-hexadecyl-sn-glycero-3-phosphocholin(DHPC) sowie das kationische Lipid1,2-Dipalmitoyl-sn-glycero-3-ethylphosphocholin (EDPPC). Die modifizierten Lipide zeigten ein verändertes Verhalten der Lipid-Monoschicht an der Luft-Wasser Grenzfläche. Im Vergleich zu DPPC war die Phasenumwandlung vom flüssig-expandierten (LE) zum flüssig-kondensierten (LC) Zustand erst bei höheren Oberflächendrücken zu finden. Die mittels Fluoreszenzmikroskopie aufgenommenen Domänen der flüssig-kondensierten Phase zeigten ein fraktales Wachstum, woraus auf eine Dominanz elektrostatischer Dipol-Kräfte in der Monoschicht geschlossen wird. Die Aggregation der Lipide wurde durch das Vorhandensein der Copolymere behindert, außer bei dem Copolymer mit angeknüpftem Cholesterol. Die Zumischung von mehr als 5% Copolymer begünstigte die Bildung von Lipid-Domänen. Die temperatur-getriebene Fusion von interdigitierten Lipidvesikeln wurde mittels Cryo-Elektronenmikroskopie und Differential Scanning Calorimetry aufgeklärt. Alle Copolymere induzierten Defekte in der Struktur der interdigitierten Gelphase der Lipide. Dies hat zur Folge, dass die Schmelz- und Kristallisationstemperaturen sich verbreiterten oder sogar aufgespalten wurden.', 'F-DPPC; DHPC; EDPPC; amphiphilic block copolymers; polyphilic block copolymers; epifluorescence microscopy; differential scanning calorimetry; cryo-electron microscopy; Langmuir monolayers; Gibbs monolayers', 'F-DPPC; DHPC; EDPPC; Amphiphile Block-Copolymere; Polyphile Block-Copolymere; Fluoreszenzmikroskopie; Differential Scanning Calorimetry; Cryo-Elektronenmikroskopie; Langmuir Monolayer; Gibbs Monolayer']]
### GND ID:
['gnd:2024276-1', 'gnd:4132140-6', 'gnd:4146026-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859171671']
### GND class:
['Martin-Luther-Universität Halle-Wittenberg', 'Phasenumwandlung', 'Blockcopolymere']
<|eot_id|> |
3A859311155.jsonld | ['Kommende Nachhaltigkeit : nachhaltige Entwicklung aus kritisch-emanzipatorischer Perspektive'] | [['This study’s starting point is the question of whether it is still possible to refer to sustainable development in a critical and emancipatory vein or whether it would be better to dispense with the hollow concept of sustainability. The author analyses different strands of justice, politics and economics in the context of the debate on sustainability (political and institutional, feminist, anti-authoritarian and integrative) and demonstrates that they have emancipatory potential. She appraises this potential in detail, using a form of discourse analysis strongly influenced by feminism. In this way, she contributes to a new and different approach to appraising sustainability, while also incorporating the findings of the critical debate on new, different and future ideas on sustainability, which has been conducted in the past twenty years, extremely knowledgeably. This study was awarded the Christiane Busch-Lüty prize for young scholars by the “Vereinigung für Ökologische Ökonomie” (German Association of Ecological Economics).', 'Die Frage, ob eine emphatische Bezugnahme auf nachhaltige Entwicklung in kritisch-emanzipatorischer Absicht überhaupt noch möglich ist oder ob es nicht besser wäre, sich von der Leerformel Nachhaltigkeit zu verabschieden, bildet den Ausgangspunkt des Bandes. Die Autorin analysiert die Gerechtigkeits-, Politik- und Ökonomieverständnisse verschiedener Stränge im Nachhaltigkeitsdiskurs (politisch-institutionelle, feministische, herrschaftskritische und integrative) und zeigt, dass in ihnen ein emanzipatorisches Potenzial steckt. Dieses arbeitet sie mithilfe eines feministisch-geprägten diskursanalytischen Ansatzes heraus. Die Verfasserin leistet damit einen Beitrag dazu, Nachhaltigkeit neu und anders zu denken, und bezieht dabei die Erkenntnisse der kritischen Debatten, die in den vergangenen 20 Jahren über dieses Neu-, Anders- und Weiterdenken geführt worden sind, kenntnisreich ein. Die Arbeit wurde mit dem Christiane Busch-Lüty Förderpreis der Vereinigung für Ökologische Ökonomie ausgezeichnet.']] | ['gnd:136450547', 'gnd:2041141-8', 'gnd:4222126-2', 'gnd:4236433-4', 'gnd:4316989-2', 'gnd:4326464-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859311155'] | ['Gottschlich, Daniela', 'Universität Osnabrück', 'Feminismus', 'Soziale Gerechtigkeit', 'Diskurstheorie', 'Nachhaltigkeit'] | Document
### Title: ['Kommende Nachhaltigkeit : nachhaltige Entwicklung aus kritisch-emanzipatorischer Perspektive']
### Abstract:
[['This study’s starting point is the question of whether it is still possible to refer to sustainable development in a critical and emancipatory vein or whether it would be better to dispense with the hollow concept of sustainability. The author analyses different strands of justice, politics and economics in the context of the debate on sustainability (political and institutional, feminist, anti-authoritarian and integrative) and demonstrates that they have emancipatory potential. She appraises this potential in detail, using a form of discourse analysis strongly influenced by feminism. In this way, she contributes to a new and different approach to appraising sustainability, while also incorporating the findings of the critical debate on new, different and future ideas on sustainability, which has been conducted in the past twenty years, extremely knowledgeably. This study was awarded the Christiane Busch-Lüty prize for young scholars by the “Vereinigung für Ökologische Ökonomie” (German Association of Ecological Economics).', 'Die Frage, ob eine emphatische Bezugnahme auf nachhaltige Entwicklung in kritisch-emanzipatorischer Absicht überhaupt noch möglich ist oder ob es nicht besser wäre, sich von der Leerformel Nachhaltigkeit zu verabschieden, bildet den Ausgangspunkt des Bandes. Die Autorin analysiert die Gerechtigkeits-, Politik- und Ökonomieverständnisse verschiedener Stränge im Nachhaltigkeitsdiskurs (politisch-institutionelle, feministische, herrschaftskritische und integrative) und zeigt, dass in ihnen ein emanzipatorisches Potenzial steckt. Dieses arbeitet sie mithilfe eines feministisch-geprägten diskursanalytischen Ansatzes heraus. Die Verfasserin leistet damit einen Beitrag dazu, Nachhaltigkeit neu und anders zu denken, und bezieht dabei die Erkenntnisse der kritischen Debatten, die in den vergangenen 20 Jahren über dieses Neu-, Anders- und Weiterdenken geführt worden sind, kenntnisreich ein. Die Arbeit wurde mit dem Christiane Busch-Lüty Förderpreis der Vereinigung für Ökologische Ökonomie ausgezeichnet.']]
### GND ID:
['gnd:136450547', 'gnd:2041141-8', 'gnd:4222126-2', 'gnd:4236433-4', 'gnd:4316989-2', 'gnd:4326464-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859311155']
### GND class:
['Gottschlich, Daniela', 'Universität Osnabrück', 'Feminismus', 'Soziale Gerechtigkeit', 'Diskurstheorie', 'Nachhaltigkeit']
<|eot_id|> |
3A859326284.jsonld | ['Regionally adaptable ground-motion Prediction Equations (GMPEs) for seismic hazard analysis'] | ['Adjustment of empirically derived ground motion prediction equations (GMPEs), from a data- rich region/site where they have been derived to a data-poor region/site, is one of the major challenges associated with the current practice of seismic hazard analysis. Due to the fre- quent use in engineering design practices the GMPEs are often derived for response spectral ordinates (e.g., spectral acceleration) of a single degree of freedom (SDOF) oscillator. The functional forms of such GMPEs are based upon the concepts borrowed from the Fourier spectral representation of ground motion. This assumption regarding the validity of Fourier spectral concepts in the response spectral domain can lead to consequences which cannot be explained physically. In this thesis, firstly results from an investigation that explores the relationship between Fourier and response spectra, and implications of this relationship on the adjustment issues of GMPEs, are presented. The relationship between the Fourier and response spectra is explored by using random …'] | ['gnd:1100392017', 'gnd:4385254-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859326284'] | ['Bora, Sanjay Singh', 'Erdbebengefahr'] | Document
### Title: ['Regionally adaptable ground-motion Prediction Equations (GMPEs) for seismic hazard analysis']
### Abstract:
['Adjustment of empirically derived ground motion prediction equations (GMPEs), from a data- rich region/site where they have been derived to a data-poor region/site, is one of the major challenges associated with the current practice of seismic hazard analysis. Due to the fre- quent use in engineering design practices the GMPEs are often derived for response spectral ordinates (e.g., spectral acceleration) of a single degree of freedom (SDOF) oscillator. The functional forms of such GMPEs are based upon the concepts borrowed from the Fourier spectral representation of ground motion. This assumption regarding the validity of Fourier spectral concepts in the response spectral domain can lead to consequences which cannot be explained physically. In this thesis, firstly results from an investigation that explores the relationship between Fourier and response spectra, and implications of this relationship on the adjustment issues of GMPEs, are presented. The relationship between the Fourier and response spectra is explored by using random …']
### GND ID:
['gnd:1100392017', 'gnd:4385254-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859326284']
### GND class:
['Bora, Sanjay Singh', 'Erdbebengefahr']
<|eot_id|> |
3A859327019.jsonld | ['Regionally adaptable ground-motion prediction equations (GMPEs) for seismic hazard analysis'] | ['Adjustment of empirically derived ground motion prediction equations (GMPEs), from a data- rich region/site where they have been derived to a data-poor region/site, is one of the major challenges associated with the current practice of seismic hazard analysis. Due to the fre- quent use in engineering design practices the GMPEs are often derived for response spectral ordinates (e.g., spectral acceleration) of a single degree of freedom (SDOF) oscillator. The functional forms of such GMPEs are based upon the concepts borrowed from the Fourier spectral representation of ground motion. This assumption regarding the validity of Fourier spectral concepts in the response spectral domain can lead to consequences which cannot be explained physically. In this thesis, firstly results from an investigation that explores the relationship between Fourier and response spectra, and implications of this relationship on the adjustment issues of GMPEs, are presented. The relationship between the Fourier and response spectra is explored by using random …'] | ['gnd:1100392017', 'gnd:4385254-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859327019'] | ['Bora, Sanjay Singh', 'Erdbebengefahr'] | Document
### Title: ['Regionally adaptable ground-motion prediction equations (GMPEs) for seismic hazard analysis']
### Abstract:
['Adjustment of empirically derived ground motion prediction equations (GMPEs), from a data- rich region/site where they have been derived to a data-poor region/site, is one of the major challenges associated with the current practice of seismic hazard analysis. Due to the fre- quent use in engineering design practices the GMPEs are often derived for response spectral ordinates (e.g., spectral acceleration) of a single degree of freedom (SDOF) oscillator. The functional forms of such GMPEs are based upon the concepts borrowed from the Fourier spectral representation of ground motion. This assumption regarding the validity of Fourier spectral concepts in the response spectral domain can lead to consequences which cannot be explained physically. In this thesis, firstly results from an investigation that explores the relationship between Fourier and response spectra, and implications of this relationship on the adjustment issues of GMPEs, are presented. The relationship between the Fourier and response spectra is explored by using random …']
### GND ID:
['gnd:1100392017', 'gnd:4385254-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859327019']
### GND class:
['Bora, Sanjay Singh', 'Erdbebengefahr']
<|eot_id|> |
3A859340430.jsonld | ['Poly(ionic liquid) stabilizers and new synthetic approaches'] | ['The main focus of the present thesis was to investigate the stabilization ability of poly(ionic liquid)s (PILs) in several examples as well as develop novel chemical structures and synthetic routes of PILs. The performed research can be specifically divided into three parts that include synthesis and application of hybrid material composed of PIL and cellulose nanofibers (CNFs), thiazolium-containing PILs, and main-chain imidazolium-type PILs. In the first chapter, a vinylimidazolium-type IL was polymerized in water in the presence of CNFs resulting in the in situ electrostatic grafting of polymeric chains onto the surface of CNFs. The synthesized hybrid material merged advantages of its two components, that is, superior mechanical strength of CNFs and anion dependent solution properties of PILs. In contrast to unmodified CNFs, the hybrid could be stabilized and processed in organic solvents enabling its application as reinforcing agent for porous polyelectrolyte membranes. In the second part, PILs and ionic polymers containing two types of thiazolium repeating units were synthesized. Such polymers displayed counterion dependent thermal stability and solubility in organic solvents of various dielectric constants. This new class of PILs was tested as stabilizers and phase transfer agents for carbon nanotubes in aqueous and organic media, and as binder materials to disperse electroactive powders and carbon additives in solid electrode in lithium-ion batteries. The incorporation of S and N atoms into the polymeric structures make such PILs also potential precursors for S, N - co-doped carbons. In the last chapter, reactants originating from biomass were successfully harnessed to synthesize main-chain imidazolium-type PILs. An imidazolium-type diester IL obtained via a modified Debus-Radziszewski reaction underwent transesterification with diol in a polycondensation reaction. This yielded a polyester-type PIL which CO2 sorption properties were investigated. In the next step, the modified Debus-Radziszewski reaction was further applied to synthesize main-chain PILs according to a convenient, one-step protocol, using water as a green solvent and simple organic molecules as reagents. Depending on the structure of the employed diamine, the synthesized PILs after anion exchange showed superior thermal stability with unusually high carbonization yields. Overall, the outcome of these studies will actively contribute to the current research on PILs by introducing novel PIL chemical structures, improved synthetic routes, and new examples of stabilized materials. The synthesis of main-chain imidazolium-type PILs by a modified Debus-Radziszewski reaction is of a special interest for the future work on porous ionic liquid networks as well as colloidal PIL nanoparticles.'] | ['gnd:110038541X', 'gnd:142882585', 'gnd:2120681-8', 'gnd:4046699-1', 'gnd:4046704-1', 'gnd:7548899-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859340430'] | ['Grygiel, Konrad', 'Antonietti, Markus', 'Universität Potsdam', 'Polymere', 'Polymerisation', 'Ionische Flüssigkeit'] | Document
### Title: ['Poly(ionic liquid) stabilizers and new synthetic approaches']
### Abstract:
['The main focus of the present thesis was to investigate the stabilization ability of poly(ionic liquid)s (PILs) in several examples as well as develop novel chemical structures and synthetic routes of PILs. The performed research can be specifically divided into three parts that include synthesis and application of hybrid material composed of PIL and cellulose nanofibers (CNFs), thiazolium-containing PILs, and main-chain imidazolium-type PILs. In the first chapter, a vinylimidazolium-type IL was polymerized in water in the presence of CNFs resulting in the in situ electrostatic grafting of polymeric chains onto the surface of CNFs. The synthesized hybrid material merged advantages of its two components, that is, superior mechanical strength of CNFs and anion dependent solution properties of PILs. In contrast to unmodified CNFs, the hybrid could be stabilized and processed in organic solvents enabling its application as reinforcing agent for porous polyelectrolyte membranes. In the second part, PILs and ionic polymers containing two types of thiazolium repeating units were synthesized. Such polymers displayed counterion dependent thermal stability and solubility in organic solvents of various dielectric constants. This new class of PILs was tested as stabilizers and phase transfer agents for carbon nanotubes in aqueous and organic media, and as binder materials to disperse electroactive powders and carbon additives in solid electrode in lithium-ion batteries. The incorporation of S and N atoms into the polymeric structures make such PILs also potential precursors for S, N - co-doped carbons. In the last chapter, reactants originating from biomass were successfully harnessed to synthesize main-chain imidazolium-type PILs. An imidazolium-type diester IL obtained via a modified Debus-Radziszewski reaction underwent transesterification with diol in a polycondensation reaction. This yielded a polyester-type PIL which CO2 sorption properties were investigated. In the next step, the modified Debus-Radziszewski reaction was further applied to synthesize main-chain PILs according to a convenient, one-step protocol, using water as a green solvent and simple organic molecules as reagents. Depending on the structure of the employed diamine, the synthesized PILs after anion exchange showed superior thermal stability with unusually high carbonization yields. Overall, the outcome of these studies will actively contribute to the current research on PILs by introducing novel PIL chemical structures, improved synthetic routes, and new examples of stabilized materials. The synthesis of main-chain imidazolium-type PILs by a modified Debus-Radziszewski reaction is of a special interest for the future work on porous ionic liquid networks as well as colloidal PIL nanoparticles.']
### GND ID:
['gnd:110038541X', 'gnd:142882585', 'gnd:2120681-8', 'gnd:4046699-1', 'gnd:4046704-1', 'gnd:7548899-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859340430']
### GND class:
['Grygiel, Konrad', 'Antonietti, Markus', 'Universität Potsdam', 'Polymere', 'Polymerisation', 'Ionische Flüssigkeit']
<|eot_id|> |
3A859344118.jsonld | ['Correlation between dynamic parameters and device performance of organic solar cells'] | ['Organic bulk heterojunction (BHJ) solar cells based on polymer:fullerene blends are a promising alternative for a low-cost solar energy conversion. Despite significant improvements of the power conversion efficiency in recent years, the fundamental working principles of these devices are yet not fully understood. In general, the current output of organic solar cells is determined by the generation of free charge carriers upon light absorption and their transport to the electrodes in competition to the loss of charge carriers due to recombination. The object of this thesis is to provide a comprehensive understanding of the dynamic processes and physical parameters determining the performance. A new approach for analyzing the characteristic current-voltage output was developed comprising the experimental determination of the efficiencies of charge carrier generation, recombination and transport, combined with numerical device simulations. Central issues at the beginning of this work were the influence of an electric field on the free …'] | ['gnd:1074719662', 'gnd:1100388729', 'gnd:2120681-8', 'gnd:7617672-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859344118'] | ['Neher, Dieter', 'Kniepert, Juliane', 'Universität Potsdam', 'Organische Solarzelle'] | Document
### Title: ['Correlation between dynamic parameters and device performance of organic solar cells']
### Abstract:
['Organic bulk heterojunction (BHJ) solar cells based on polymer:fullerene blends are a promising alternative for a low-cost solar energy conversion. Despite significant improvements of the power conversion efficiency in recent years, the fundamental working principles of these devices are yet not fully understood. In general, the current output of organic solar cells is determined by the generation of free charge carriers upon light absorption and their transport to the electrodes in competition to the loss of charge carriers due to recombination. The object of this thesis is to provide a comprehensive understanding of the dynamic processes and physical parameters determining the performance. A new approach for analyzing the characteristic current-voltage output was developed comprising the experimental determination of the efficiencies of charge carrier generation, recombination and transport, combined with numerical device simulations. Central issues at the beginning of this work were the influence of an electric field on the free …']
### GND ID:
['gnd:1074719662', 'gnd:1100388729', 'gnd:2120681-8', 'gnd:7617672-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859344118']
### GND class:
['Neher, Dieter', 'Kniepert, Juliane', 'Universität Potsdam', 'Organische Solarzelle']
<|eot_id|> |
3A859352889.jsonld | ['A petrological and geochemical cross section of lower crust at the Wadi Gideah (Samail ophiolite) : implications for the crustal accretion at fast-spreading mid-ocean ridges'] | ['Fast-spreading mid-ocean ridges, crustal accretion, Oman ophiolite, Wadi Gideah, layered gabbro, major elements, trace elements, crystallographic preferred orientation, axial melt lens. - Schnell-spreizende mittelozeanische Rücken, Krustenbildung, Oman Ophiolith, lagige Gabbros, Hauptelemente, Spurenelemente, bevorzugte kristallographische Orientierung, axiale Schmelzlinse'] | ['gnd:1119827558', 'gnd:4020740-7', 'gnd:4033215-9', 'gnd:4043869-7', 'gnd:4059665-5', 'gnd:4075653-1', 'gnd:4155780-3', 'gnd:4156614-2', 'gnd:4157153-8', 'gnd:4172633-9', 'gnd:4172635-2', 'gnd:4181365-0', 'gnd:4401814-9', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859352889'] | ['Müller, Tim', 'Gesteinskunde', 'Kristallisation', 'Orientierung', 'Textur', 'Oman', 'Gabbro', 'Entstehung', 'Gesteinsbildung', 'Ophiolith', 'Ophiolithkomplex', 'Silicatschmelze', 'Ozeanische Erdkruste', 'Gottfried Wilhelm Leibniz Universität Hannover'] | Document
### Title: ['A petrological and geochemical cross section of lower crust at the Wadi Gideah (Samail ophiolite) : implications for the crustal accretion at fast-spreading mid-ocean ridges']
### Abstract:
['Fast-spreading mid-ocean ridges, crustal accretion, Oman ophiolite, Wadi Gideah, layered gabbro, major elements, trace elements, crystallographic preferred orientation, axial melt lens. - Schnell-spreizende mittelozeanische Rücken, Krustenbildung, Oman Ophiolith, lagige Gabbros, Hauptelemente, Spurenelemente, bevorzugte kristallographische Orientierung, axiale Schmelzlinse']
### GND ID:
['gnd:1119827558', 'gnd:4020740-7', 'gnd:4033215-9', 'gnd:4043869-7', 'gnd:4059665-5', 'gnd:4075653-1', 'gnd:4155780-3', 'gnd:4156614-2', 'gnd:4157153-8', 'gnd:4172633-9', 'gnd:4172635-2', 'gnd:4181365-0', 'gnd:4401814-9', 'gnd:64681-7', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859352889']
### GND class:
['Müller, Tim', 'Gesteinskunde', 'Kristallisation', 'Orientierung', 'Textur', 'Oman', 'Gabbro', 'Entstehung', 'Gesteinsbildung', 'Ophiolith', 'Ophiolithkomplex', 'Silicatschmelze', 'Ozeanische Erdkruste', 'Gottfried Wilhelm Leibniz Universität Hannover']
<|eot_id|> |
3A859483266.jsonld | ['Sequences of compact curvature'] | ['By perturbing the differential of a (cochain-)complex by "small" operators, one obtains what is referred to as quasicomplexes, i.e. a sequence whose curvature is not equal to zero in general. In this situation the cohomology is no longer defined. Note that it depends on the structure of the underlying spaces whether or not an operator is "small." This leads to a magical mix of perturbation and regularisation theory. In the general setting of Hilbert spaces compact operators are "small." In order to develop this theory, many elements of diverse mathematical disciplines, such as functional analysis, differential geometry, partial differential equation, homological algebra and topology have to be combined. All essential basics are summarised in the first chapter of this thesis. This contains classical elements of index theory, such as Fredholm operators, elliptic pseudodifferential operators and characteristic classes. Moreover we study the de Rham complex and introduce Sobolev spaces of arbitrary order as well as the concept of operator…'] | ['gnd:1100573984', 'gnd:4199279-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859483266'] | ['Wallenta, Daniel', 'Quasikonforme Abbildung'] | Document
### Title: ['Sequences of compact curvature']
### Abstract:
['By perturbing the differential of a (cochain-)complex by "small" operators, one obtains what is referred to as quasicomplexes, i.e. a sequence whose curvature is not equal to zero in general. In this situation the cohomology is no longer defined. Note that it depends on the structure of the underlying spaces whether or not an operator is "small." This leads to a magical mix of perturbation and regularisation theory. In the general setting of Hilbert spaces compact operators are "small." In order to develop this theory, many elements of diverse mathematical disciplines, such as functional analysis, differential geometry, partial differential equation, homological algebra and topology have to be combined. All essential basics are summarised in the first chapter of this thesis. This contains classical elements of index theory, such as Fredholm operators, elliptic pseudodifferential operators and characteristic classes. Moreover we study the de Rham complex and introduce Sobolev spaces of arbitrary order as well as the concept of operator…']
### GND ID:
['gnd:1100573984', 'gnd:4199279-9', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859483266']
### GND class:
['Wallenta, Daniel', 'Quasikonforme Abbildung']
<|eot_id|> |
3A859515044.jsonld | ['Development of geophysical methods to characterize methane hydrate reservoirs on a laboratory scale'] | ['Gas hydrates are crystalline solids composed of water and gas molecules. They are stable at elevated pressure and low temperatures. Therefore, natural gas hydrate deposits occur at continental margins, permafrost areas, deep lakes, and deep inland seas. During hydrate formation, the water molecules rearrange to form cavities which host gas molecules. Due to the high pressure during hydrate formation, significant amounts of gas can be stored in hydrate structures. The water-gas ratio hereby can reach up to 1:172 at 0°C and atmospheric pressure. Natural gas hydrates predominantly contain methane. Because methane constitutes both a fuel and a greenhouse gas, gas hydrates are a potential energy resource as well as a potential source for greenhouse gas. This study investigates the physical properties of methane hydrate bearing sediments on a laboratory scale. To do so, an electrical resistivity tomography (ERT) array was developed and mounted in a large reservoir simulator (LARS). For the first time, the ERT array was applied to hydrate saturated sediment samples under controlled temperature, pressure, and hydrate saturation conditions on a laboratory scale. Typically, the pore space of (marine) sediments is filled with electrically well conductive brine. Because hydrates constitute an electrical isolator, significant contrasts regarding the electrical properties of the pore space emerge during hydrate formation and dissociation. Frequent measurements during hydrate formation experiments permit the recordings of the spatial resistivity distribution inside LARS. Those data sets are used as input for a new data processing routine which transfers the spatial resistivity distribution into the spatial distribution of hydrate saturation. Thus, the changes of local hydrate saturation can be monitored with respect to space and time. This study shows that the developed tomography yielded good data quality and resolved even small amounts of hydrate saturation inside the sediment sample. The conversion algorithm transforming the spatial resistivity distribution into local hydrate saturation values yielded the best results using the Archie-var-phi relation. This approach considers the increasing hydrate phase as part of the sediment frame, metaphorically reducing the sample’s porosity. In addition, the tomographical measurements showed that fast lab based hydrate formation processes cause small crystallites to form which tend to recrystallize. Furthermore, hydrate dissociation experiments via depressurization were conducted in order to mimic the 2007/2008 Mallik field trial. It was observed that some patterns in gas and water flow could be reproduced, even though some setup related limitations arose. In two additional long-term experiments the feasibility and performance of CO2-CH4 hydrate exchange reactions were studied in LARS. The tomographical system was used to monitor the spatial hydrate distribution during the hydrate formation stage. During the subsequent CO2 injection, the tomographical array allowed to follow the CO2 migration front inside the sediment sample and helped to identify the CO2 breakthrough.'] | ['gnd:1100702911', 'gnd:121849112', 'gnd:2120681-8', 'gnd:4152663-6', 'gnd:4169678-5', 'gnd:4282527-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859515044'] | ['Priegnitz, Mike', 'Schicks, Judith Maria', 'Universität Potsdam', 'Erdgaslagerstätte', 'Methan', 'Gashydrate'] | Document
### Title: ['Development of geophysical methods to characterize methane hydrate reservoirs on a laboratory scale']
### Abstract:
['Gas hydrates are crystalline solids composed of water and gas molecules. They are stable at elevated pressure and low temperatures. Therefore, natural gas hydrate deposits occur at continental margins, permafrost areas, deep lakes, and deep inland seas. During hydrate formation, the water molecules rearrange to form cavities which host gas molecules. Due to the high pressure during hydrate formation, significant amounts of gas can be stored in hydrate structures. The water-gas ratio hereby can reach up to 1:172 at 0°C and atmospheric pressure. Natural gas hydrates predominantly contain methane. Because methane constitutes both a fuel and a greenhouse gas, gas hydrates are a potential energy resource as well as a potential source for greenhouse gas. This study investigates the physical properties of methane hydrate bearing sediments on a laboratory scale. To do so, an electrical resistivity tomography (ERT) array was developed and mounted in a large reservoir simulator (LARS). For the first time, the ERT array was applied to hydrate saturated sediment samples under controlled temperature, pressure, and hydrate saturation conditions on a laboratory scale. Typically, the pore space of (marine) sediments is filled with electrically well conductive brine. Because hydrates constitute an electrical isolator, significant contrasts regarding the electrical properties of the pore space emerge during hydrate formation and dissociation. Frequent measurements during hydrate formation experiments permit the recordings of the spatial resistivity distribution inside LARS. Those data sets are used as input for a new data processing routine which transfers the spatial resistivity distribution into the spatial distribution of hydrate saturation. Thus, the changes of local hydrate saturation can be monitored with respect to space and time. This study shows that the developed tomography yielded good data quality and resolved even small amounts of hydrate saturation inside the sediment sample. The conversion algorithm transforming the spatial resistivity distribution into local hydrate saturation values yielded the best results using the Archie-var-phi relation. This approach considers the increasing hydrate phase as part of the sediment frame, metaphorically reducing the sample’s porosity. In addition, the tomographical measurements showed that fast lab based hydrate formation processes cause small crystallites to form which tend to recrystallize. Furthermore, hydrate dissociation experiments via depressurization were conducted in order to mimic the 2007/2008 Mallik field trial. It was observed that some patterns in gas and water flow could be reproduced, even though some setup related limitations arose. In two additional long-term experiments the feasibility and performance of CO2-CH4 hydrate exchange reactions were studied in LARS. The tomographical system was used to monitor the spatial hydrate distribution during the hydrate formation stage. During the subsequent CO2 injection, the tomographical array allowed to follow the CO2 migration front inside the sediment sample and helped to identify the CO2 breakthrough.']
### GND ID:
['gnd:1100702911', 'gnd:121849112', 'gnd:2120681-8', 'gnd:4152663-6', 'gnd:4169678-5', 'gnd:4282527-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859515044']
### GND class:
['Priegnitz, Mike', 'Schicks, Judith Maria', 'Universität Potsdam', 'Erdgaslagerstätte', 'Methan', 'Gashydrate']
<|eot_id|> |
3A859604241.jsonld | ['Analysis and modeling of transient earthquake patterns and their dependence on local stress regimes'] | ['Investigations in the field of earthquake triggering and associated interactions, which includes aftershock triggering as well as induced seismicity, is important for seismic hazard assessment due to earthquakes destructive power. One of the approaches to study earthquake triggering and their interactions is the use of statistical earthquake models, which are based on knowledge of the basic seismicity properties, in particular, the magnitude distribution and spatiotemporal properties of the triggered events. In my PhD thesis I focus on some specific aspects of aftershock properties, namely, the relative seismic moment release of the aftershocks with respect to the mainshocks; the spatial correlation between aftershock occurrence and fault deformation; and on the influence of aseismic transients on the aftershock parameter estimation. For the analysis of aftershock sequences I choose a statistical approach, in particular, the well known Epidemic Type Aftershock Sequence (ETAS) model, which accounts for the input of background and trig…'] | ['gnd:1100871101', 'gnd:121190080', 'gnd:4587352-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859604241'] | ['Zakharova, Olga', 'Hainzl, Sebastian', 'Nachbeben'] | Document
### Title: ['Analysis and modeling of transient earthquake patterns and their dependence on local stress regimes']
### Abstract:
['Investigations in the field of earthquake triggering and associated interactions, which includes aftershock triggering as well as induced seismicity, is important for seismic hazard assessment due to earthquakes destructive power. One of the approaches to study earthquake triggering and their interactions is the use of statistical earthquake models, which are based on knowledge of the basic seismicity properties, in particular, the magnitude distribution and spatiotemporal properties of the triggered events. In my PhD thesis I focus on some specific aspects of aftershock properties, namely, the relative seismic moment release of the aftershocks with respect to the mainshocks; the spatial correlation between aftershock occurrence and fault deformation; and on the influence of aseismic transients on the aftershock parameter estimation. For the analysis of aftershock sequences I choose a statistical approach, in particular, the well known Epidemic Type Aftershock Sequence (ETAS) model, which accounts for the input of background and trig…']
### GND ID:
['gnd:1100871101', 'gnd:121190080', 'gnd:4587352-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859604241']
### GND class:
['Zakharova, Olga', 'Hainzl, Sebastian', 'Nachbeben']
<|eot_id|> |
3A859604969.jsonld | ['Analysis and modeling of transient earthquake patterns and their dependence on local stress regimes'] | ['Investigations in the field of earthquake triggering and associated interactions, which includes aftershock triggering as well as induced seismicity, is important for seismic hazard assessment due to earthquakes destructive power. One of the approaches to study earthquake triggering and their interactions is the use of statistical earthquake models, which are based on knowledge of the basic seismicity properties, in particular, the magnitude distribution and spatiotemporal properties of the triggered events. In my PhD thesis I focus on some specific aspects of aftershock properties, namely, the relative seismic moment release of the aftershocks with respect to the mainshocks; the spatial correlation between aftershock occurrence and fault deformation; and on the influence of aseismic transients on the aftershock parameter estimation. For the analysis of aftershock sequences I choose a statistical approach, in particular, the well known Epidemic Type Aftershock Sequence (ETAS) model, which accounts for the input of background and trig…'] | ['gnd:1100871101', 'gnd:121190080', 'gnd:2120681-8', 'gnd:4587352-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859604969'] | ['Zakharova, Olga', 'Hainzl, Sebastian', 'Universität Potsdam', 'Nachbeben'] | Document
### Title: ['Analysis and modeling of transient earthquake patterns and their dependence on local stress regimes']
### Abstract:
['Investigations in the field of earthquake triggering and associated interactions, which includes aftershock triggering as well as induced seismicity, is important for seismic hazard assessment due to earthquakes destructive power. One of the approaches to study earthquake triggering and their interactions is the use of statistical earthquake models, which are based on knowledge of the basic seismicity properties, in particular, the magnitude distribution and spatiotemporal properties of the triggered events. In my PhD thesis I focus on some specific aspects of aftershock properties, namely, the relative seismic moment release of the aftershocks with respect to the mainshocks; the spatial correlation between aftershock occurrence and fault deformation; and on the influence of aseismic transients on the aftershock parameter estimation. For the analysis of aftershock sequences I choose a statistical approach, in particular, the well known Epidemic Type Aftershock Sequence (ETAS) model, which accounts for the input of background and trig…']
### GND ID:
['gnd:1100871101', 'gnd:121190080', 'gnd:2120681-8', 'gnd:4587352-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859604969']
### GND class:
['Zakharova, Olga', 'Hainzl, Sebastian', 'Universität Potsdam', 'Nachbeben']
<|eot_id|> |
3A859615286.jsonld | ['Quantification of internal variability of the arctic summer atmosphere based on HIRHAM5 ensemble simulations'] | ['The non-linear behaviour of the atmospheric dynamics is not well understood and makes the evaluation and usage of regional climate models (RCMs) difficult. Due to these non-linearities, chaos and internal variability (IV) within the RCMs are induced, leading to a sensitivity of RCMs to their initial conditions (IC). The IV is the ability of RCMs to realise different solutions of simulations that differ in their IC, but have the same lower and lateral boundary conditions (LBC), hence can be defined as the across-member spread between the ensemble members. For the investigation of the IV and the dynamical and diabatic contributions generating the IV four ensembles of RCM simulations are performed with the atmospheric regional model HIRHAM5. The integration area is the Arctic and each ensemble consists of 20 members. The ensembles cover the time period from July to September for the years 2006, 2007, 2009 and 2012. The ensemble members have the same LBC and differ in their IC only. The different IC are arranged by an initialisation time…'] | ['gnd:143007203', 'gnd:2120681-8', 'gnd:4031170-3', 'gnd:4039798-1', 'gnd:4473159-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859615286'] | ['Sommerfeld, Anja', 'Universität Potsdam', 'Klima', 'Modell', 'Arktisforschung'] | Document
### Title: ['Quantification of internal variability of the arctic summer atmosphere based on HIRHAM5 ensemble simulations']
### Abstract:
['The non-linear behaviour of the atmospheric dynamics is not well understood and makes the evaluation and usage of regional climate models (RCMs) difficult. Due to these non-linearities, chaos and internal variability (IV) within the RCMs are induced, leading to a sensitivity of RCMs to their initial conditions (IC). The IV is the ability of RCMs to realise different solutions of simulations that differ in their IC, but have the same lower and lateral boundary conditions (LBC), hence can be defined as the across-member spread between the ensemble members. For the investigation of the IV and the dynamical and diabatic contributions generating the IV four ensembles of RCM simulations are performed with the atmospheric regional model HIRHAM5. The integration area is the Arctic and each ensemble consists of 20 members. The ensembles cover the time period from July to September for the years 2006, 2007, 2009 and 2012. The ensemble members have the same LBC and differ in their IC only. The different IC are arranged by an initialisation time…']
### GND ID:
['gnd:143007203', 'gnd:2120681-8', 'gnd:4031170-3', 'gnd:4039798-1', 'gnd:4473159-0', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859615286']
### GND class:
['Sommerfeld, Anja', 'Universität Potsdam', 'Klima', 'Modell', 'Arktisforschung']
<|eot_id|> |
3A859664643.jsonld | ['Centrifugal microfluidics for nucleic acid analysis at the point-of-care'] | [['Zusammenfassung: The analysis of nucleic acids is an essential pre-requisite for initialisation of evidence based therapy of many genetic, inherited or infectious diseases in which the presentation of the clinical symptoms is non-specific or certain sequence patterns on the nucleic acid strand are associated with a pathological indication. Compared to conventional culture based methods, nucleic acid analysis provides an obvious benefit in specificity and reduction in time-to-result. In time-critical situations and in settings where access to centralized labora-tories for sample analysis is limited, nucleic acid analysis, conducted directly at the “point-of-care” would be desired. However, the complex workflow for analysis, typically comprising cell lysis, nucleic acid purification, amplification and detection, hinders the automation in portable systems and consequently only few point-of-care systems are available.Aim of this thesis was the development of a centrifugal microfluidic cartridge for nucleic acid analysis that potentially could be operated at the point-of-care. To achieve this goal, several sub-goals including the development of a process chains for nucleic acid extraction and for multiplex nucleic acid amplification were defined. These process chains were finally co-integrated on one cartridge for sample-to-answer nucleic acid analysis.Initially, a unit operation for transportation of magnetic beads between several microfluidic chambers was developed. Here, bead transport was solely depending on the azimuthal position of the cartridge with respect to a locally fixed, external permanent magnet, ‘transport magnet’. This implementation allowed an isoradial arrangement of the microfluidic chambers thereby circumventing one of the basic limitations for integration of complex assays on the centrifugal microfluidic cartridge: the arrangement of consequtive assay steps in radial direction from the cartridge center towards the rim. Yield of bead transport through three microfluidic chambers was measured to 82.6 % ± 3.6 %. With this unit operation, DNA from Listeria innocua lysates and lambda phages was purified with recoveries of up to 68 % ± 24 % and 43 % ± 10 %, respectively, compared to manual reference. The unit-operation was then completed by a second external permanent magnet, ‘collection magnet’, to collect beads in liquid volumes as large as 1 mL before they are transported out of the liquid into the adjacent microfluidic chamber ...', 'Zusammenfassung: Die Analyse von Nukleinsäuresequenzen ist die Grundlage für die Einleitung von evidenzbasierten Therapien vieler infektions-, genetisch und erblich bedingter Krankheiten insbesondere wenn sich diese durch eine unspezifische Symptomatik präsentieren oder Sequenzmuster auf dem Nukleinsäurestrang mit einem pathogenen Befund assozziert sein können. Konventionellen, kulturbasierten Verfahren ist die Nukleinsäureanalytik vor allem durch eine höhere Spezifizität und eine geringere Analysezeit überlegen. Für zeitkritische Fragestellungen und in Umgebungen, in denen kein Zugang zu einer zentrallabor-basierten Diagnostik besteht, wäre eine Durchführung der Analyse am sogenannten Point-of-Care wünschenswert. Die Vielzahl der erforderlichen Einzelschritten wie Zelllyse, Nukleinsäureaufreinigung, Amplifikation und Detektion, erschwert jedoch eine Automatisierung der Analyse erheblich. Aus diesem Grund sind erst wenige Point-of-Care Systeme am Markt verfügbar. Ziel der vorliegenden Arbeit war die Entwicklung einer zentrifugal-mikrofluidischen Kartusche für die Nukleinsäureanalytik die potentiell am Point-of-Care eingesetzt werden kann. Um dieses Ziel zu erreichen wurden mehrere Teilziele einschließlich der Entwicklung von zentrifugal-mikrofluidischen Prozessketten zur Nukleinsäureextraktion und Amplifikation definiert. Anschließend wurden die entwickelten Prozessketten gemeinsam in eine Kartusche integriert um den vollständigen Ablauf der Analyse von der Probenaufgabe bis zum Ergebnis automatisiert abzubilden. Zu Beginn wurde eine mikrofluidische Einheitsoperation zum Transport magnetischer Partikel zwischen mehreren mikrofluidischen Kammern entwickelt. Der Transport der Partikel basierte in dieser Entwicklung auf der einfachen azimuthalen Positionierung der Kartusche bezüglich eines externen und stationären Permanentmagneten, dem „Transport-Magneten“. Mit diesem Aufbau war es möglich, die mikrofluidischen Kammern auf der Kartusche isoradial anzuordnen um so eine grundlegende Limitierung für die Integration komplexer Analyseprozeduren auf der zentrifugalen Mikrofluidik, die Anordnung aufeinander folgender Prozessschritte in radiale Richtung, zu umgehen. Nach dem Transport durch drei mikrofluidische Kammern wurde die Ausbeute der Beads in der letzten Kammer zu 82.6 % ± 3.6 % bestimmt. Mit der entwickelten Einheitsoperation konnte anschließend DNA aus Listeria innocua Lysaten und Lambda phagen mit eine ...']] | ['gnd:1100290664', 'gnd:4172117-2', 'gnd:4803438-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859664643'] | ['Strohmeier, Oliver', 'Nucleinsäuren', 'Mikrofluidik'] | Document
### Title: ['Centrifugal microfluidics for nucleic acid analysis at the point-of-care']
### Abstract:
[['Zusammenfassung: The analysis of nucleic acids is an essential pre-requisite for initialisation of evidence based therapy of many genetic, inherited or infectious diseases in which the presentation of the clinical symptoms is non-specific or certain sequence patterns on the nucleic acid strand are associated with a pathological indication. Compared to conventional culture based methods, nucleic acid analysis provides an obvious benefit in specificity and reduction in time-to-result. In time-critical situations and in settings where access to centralized labora-tories for sample analysis is limited, nucleic acid analysis, conducted directly at the “point-of-care” would be desired. However, the complex workflow for analysis, typically comprising cell lysis, nucleic acid purification, amplification and detection, hinders the automation in portable systems and consequently only few point-of-care systems are available.Aim of this thesis was the development of a centrifugal microfluidic cartridge for nucleic acid analysis that potentially could be operated at the point-of-care. To achieve this goal, several sub-goals including the development of a process chains for nucleic acid extraction and for multiplex nucleic acid amplification were defined. These process chains were finally co-integrated on one cartridge for sample-to-answer nucleic acid analysis.Initially, a unit operation for transportation of magnetic beads between several microfluidic chambers was developed. Here, bead transport was solely depending on the azimuthal position of the cartridge with respect to a locally fixed, external permanent magnet, ‘transport magnet’. This implementation allowed an isoradial arrangement of the microfluidic chambers thereby circumventing one of the basic limitations for integration of complex assays on the centrifugal microfluidic cartridge: the arrangement of consequtive assay steps in radial direction from the cartridge center towards the rim. Yield of bead transport through three microfluidic chambers was measured to 82.6 % ± 3.6 %. With this unit operation, DNA from Listeria innocua lysates and lambda phages was purified with recoveries of up to 68 % ± 24 % and 43 % ± 10 %, respectively, compared to manual reference. The unit-operation was then completed by a second external permanent magnet, ‘collection magnet’, to collect beads in liquid volumes as large as 1 mL before they are transported out of the liquid into the adjacent microfluidic chamber ...', 'Zusammenfassung: Die Analyse von Nukleinsäuresequenzen ist die Grundlage für die Einleitung von evidenzbasierten Therapien vieler infektions-, genetisch und erblich bedingter Krankheiten insbesondere wenn sich diese durch eine unspezifische Symptomatik präsentieren oder Sequenzmuster auf dem Nukleinsäurestrang mit einem pathogenen Befund assozziert sein können. Konventionellen, kulturbasierten Verfahren ist die Nukleinsäureanalytik vor allem durch eine höhere Spezifizität und eine geringere Analysezeit überlegen. Für zeitkritische Fragestellungen und in Umgebungen, in denen kein Zugang zu einer zentrallabor-basierten Diagnostik besteht, wäre eine Durchführung der Analyse am sogenannten Point-of-Care wünschenswert. Die Vielzahl der erforderlichen Einzelschritten wie Zelllyse, Nukleinsäureaufreinigung, Amplifikation und Detektion, erschwert jedoch eine Automatisierung der Analyse erheblich. Aus diesem Grund sind erst wenige Point-of-Care Systeme am Markt verfügbar. Ziel der vorliegenden Arbeit war die Entwicklung einer zentrifugal-mikrofluidischen Kartusche für die Nukleinsäureanalytik die potentiell am Point-of-Care eingesetzt werden kann. Um dieses Ziel zu erreichen wurden mehrere Teilziele einschließlich der Entwicklung von zentrifugal-mikrofluidischen Prozessketten zur Nukleinsäureextraktion und Amplifikation definiert. Anschließend wurden die entwickelten Prozessketten gemeinsam in eine Kartusche integriert um den vollständigen Ablauf der Analyse von der Probenaufgabe bis zum Ergebnis automatisiert abzubilden. Zu Beginn wurde eine mikrofluidische Einheitsoperation zum Transport magnetischer Partikel zwischen mehreren mikrofluidischen Kammern entwickelt. Der Transport der Partikel basierte in dieser Entwicklung auf der einfachen azimuthalen Positionierung der Kartusche bezüglich eines externen und stationären Permanentmagneten, dem „Transport-Magneten“. Mit diesem Aufbau war es möglich, die mikrofluidischen Kammern auf der Kartusche isoradial anzuordnen um so eine grundlegende Limitierung für die Integration komplexer Analyseprozeduren auf der zentrifugalen Mikrofluidik, die Anordnung aufeinander folgender Prozessschritte in radiale Richtung, zu umgehen. Nach dem Transport durch drei mikrofluidische Kammern wurde die Ausbeute der Beads in der letzten Kammer zu 82.6 % ± 3.6 % bestimmt. Mit der entwickelten Einheitsoperation konnte anschließend DNA aus Listeria innocua Lysaten und Lambda phagen mit eine ...']]
### GND ID:
['gnd:1100290664', 'gnd:4172117-2', 'gnd:4803438-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859664643']
### GND class:
['Strohmeier, Oliver', 'Nucleinsäuren', 'Mikrofluidik']
<|eot_id|> |
3A859664686.jsonld | ['Entwurf und Modellierung eines mikroakustischen Sensors zur Analytik in Flüssigkeit'] | [["Zusammenfassung: The objective of this thesis is the design and modeling of an acoustic sensor for the detection of chemical or biological substances in liquid. The principle of such acoustic sensors is based on the direct binding of an analyte on a sensitive layer, which is deposited on the oscillating sensor surface. In principal, no further laboratory equipment is needed for this detection procedure, and it is therefore well suited for portable low cost rapid tests. Admittedly, the applicability of available sensors for non-standarized liquids is limited, since the physical properties of the liquid contribute to the measurement result. In this work a microacoustic sensor is proposed, which could be more suitable for non-standarized liquids. This novel sensor construction is based on the flexural plate wave device, which was introduced in 1987 by White [WWa87], and used in its primary design since that time. Because of the particular properties of the flexural wave, this type of sensor is very well suited for multiparametric sensing, that is the measurement of liquid properties and mass deposition at the same time. This novel sensor design should eliminate serious disadvantages of the existing design. In the construction proposed here, the electrodes are not deposited on the membrane, but are buried in the membrane. Thereby the electromechanical coupling is improved and the transducer is electrically shielded. Due to the perfect shielding, both sides of the membrane can be used for sensing and the sensor can be completely embedded in the fluid. The theoretical advantages are the increase in sensitivity and electromechanical coupling, the reduction of electrical cross talk, and the minimized disturbances arising from pressure fluctuations across the membrane. Thus, the signal to noise ratio and the detection limit should be improved.In this work simple sensor structures were designed with the purpose of process development, which was done by Fraunhofer Institute for Applied Solid State Physics Freiburg. However, the focus of this work is on the analytical modeling of wave propagation. Analytical models of flexural plate wave devices were reported in the 80's and are based on Euler-Bernoulli plate theory [WW88b]. The accuracy of Euler-Bernoulli model is certainly only sufficient for low propagation speeds and therefore not suited for new concepts like the multiparametric sensing approach or miniaturization by utilization of small wavelengths.In this work ...", 'Zusammenfassung: Gegenstand dieser Dissertation ist die Entwicklung und Modellierung eines akustischen Sensors zum Nachweis von chemischen oder biologischen Substanzen in Flüssigkeit. Das Prinzip solcher akustischen Sensoren beruht auf der direkten Bindung eines Analyts an eine sensitive Schicht, die auf der schwingenden Sensoroberfläche aufgebracht ist. Für dieses direkte Nachweisverfahren sind im Prinzip keine weiteren Laborapparate notwendig und es ist deshalb besonders gut für preisgünstige und tragbare Schnelltests geeignet. Allerdings ist der Anwendungsbereich vorhandener Sensoren bei nicht standardisierten Flüssigkeiten eingeschränkt, weil die physikalischen Eigenschaften der Flüssigkeit in das Analyseergebnis eingehen.In dieser Arbeit wird ein mikroakustischer Sensor vorgeschlagen, der besser zur Analytik von nicht standardisierten Flüssigkeiten geeignet sein könnte.Der mit dieser Arbeit erstmals vorgeschlagene mikroakustische Sensor baut auf den piezoelektrischen Membranbiegeschwingern auf, die 1987 von White [WWa87] erstmals beschrieben wurden und seither in nahezu unverändertem Aufbau genutzt werden. Dieser Sensortyp ist wegen seiner besonderen Welleneigenschaften sehr gut zur Multiparametersensorik, also der simultanen Detektion unterschiedlicher Stoffeigenschaften, geeignet.Durch ein neuartiges Design des Sensors sollen wesentliche Nachteile des Aufbaus üblicher Sensoren behoben werden. Im hier beschriebenen Aufbau sind die Elektroden nicht auf der Membran aufgebracht, sondern in der Membran vergraben. Dadurch wird die elektromechanische Kopplung verbessert und der Wandler gleichzeitig elektrisch abgeschirmt. Wegen der vollständigen Abschirmung sind beide Seiten der Membran sensorisch nutzbar und der Sensor kann vollständig in die Flüssigkeit eingetaucht werden. Die theoretischen Vorteile dieser Konstruktion sind die erhöhte Sensitivität und elektromechanische Kopplung, das reduzierte elektrische Übersprechen und die Minimierung von Störungen aufgrund von Druckschwankungen über der Membran. Somit ist aufgrund des verbesserten Signal zu Rausch Verhältnisses eine verbesserte Nachweisgrenze zu erwarten. In dieser Arbeit werden einfache Sensoren für die Prozessentwicklung entworfen, mit der das Fraunhofer Instituts für angewandte Festkörperphysik betraut war. Der Schwerpunkt dieser Arbeit liegt aber auf der analytischen Modellierung der Wellenausbreitung. Analytische Modelle zur Beschreibung der Mem ...']] | ['gnd:1100192352', 'gnd:4000988-9', 'gnd:4017621-6', 'gnd:4038824-4', 'gnd:4122795-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859664686'] | ['Katus, Philip', 'Akustik', 'Flüssigkeit', 'Sensor', 'Analyse'] | Document
### Title: ['Entwurf und Modellierung eines mikroakustischen Sensors zur Analytik in Flüssigkeit']
### Abstract:
[["Zusammenfassung: The objective of this thesis is the design and modeling of an acoustic sensor for the detection of chemical or biological substances in liquid. The principle of such acoustic sensors is based on the direct binding of an analyte on a sensitive layer, which is deposited on the oscillating sensor surface. In principal, no further laboratory equipment is needed for this detection procedure, and it is therefore well suited for portable low cost rapid tests. Admittedly, the applicability of available sensors for non-standarized liquids is limited, since the physical properties of the liquid contribute to the measurement result. In this work a microacoustic sensor is proposed, which could be more suitable for non-standarized liquids. This novel sensor construction is based on the flexural plate wave device, which was introduced in 1987 by White [WWa87], and used in its primary design since that time. Because of the particular properties of the flexural wave, this type of sensor is very well suited for multiparametric sensing, that is the measurement of liquid properties and mass deposition at the same time. This novel sensor design should eliminate serious disadvantages of the existing design. In the construction proposed here, the electrodes are not deposited on the membrane, but are buried in the membrane. Thereby the electromechanical coupling is improved and the transducer is electrically shielded. Due to the perfect shielding, both sides of the membrane can be used for sensing and the sensor can be completely embedded in the fluid. The theoretical advantages are the increase in sensitivity and electromechanical coupling, the reduction of electrical cross talk, and the minimized disturbances arising from pressure fluctuations across the membrane. Thus, the signal to noise ratio and the detection limit should be improved.In this work simple sensor structures were designed with the purpose of process development, which was done by Fraunhofer Institute for Applied Solid State Physics Freiburg. However, the focus of this work is on the analytical modeling of wave propagation. Analytical models of flexural plate wave devices were reported in the 80's and are based on Euler-Bernoulli plate theory [WW88b]. The accuracy of Euler-Bernoulli model is certainly only sufficient for low propagation speeds and therefore not suited for new concepts like the multiparametric sensing approach or miniaturization by utilization of small wavelengths.In this work ...", 'Zusammenfassung: Gegenstand dieser Dissertation ist die Entwicklung und Modellierung eines akustischen Sensors zum Nachweis von chemischen oder biologischen Substanzen in Flüssigkeit. Das Prinzip solcher akustischen Sensoren beruht auf der direkten Bindung eines Analyts an eine sensitive Schicht, die auf der schwingenden Sensoroberfläche aufgebracht ist. Für dieses direkte Nachweisverfahren sind im Prinzip keine weiteren Laborapparate notwendig und es ist deshalb besonders gut für preisgünstige und tragbare Schnelltests geeignet. Allerdings ist der Anwendungsbereich vorhandener Sensoren bei nicht standardisierten Flüssigkeiten eingeschränkt, weil die physikalischen Eigenschaften der Flüssigkeit in das Analyseergebnis eingehen.In dieser Arbeit wird ein mikroakustischer Sensor vorgeschlagen, der besser zur Analytik von nicht standardisierten Flüssigkeiten geeignet sein könnte.Der mit dieser Arbeit erstmals vorgeschlagene mikroakustische Sensor baut auf den piezoelektrischen Membranbiegeschwingern auf, die 1987 von White [WWa87] erstmals beschrieben wurden und seither in nahezu unverändertem Aufbau genutzt werden. Dieser Sensortyp ist wegen seiner besonderen Welleneigenschaften sehr gut zur Multiparametersensorik, also der simultanen Detektion unterschiedlicher Stoffeigenschaften, geeignet.Durch ein neuartiges Design des Sensors sollen wesentliche Nachteile des Aufbaus üblicher Sensoren behoben werden. Im hier beschriebenen Aufbau sind die Elektroden nicht auf der Membran aufgebracht, sondern in der Membran vergraben. Dadurch wird die elektromechanische Kopplung verbessert und der Wandler gleichzeitig elektrisch abgeschirmt. Wegen der vollständigen Abschirmung sind beide Seiten der Membran sensorisch nutzbar und der Sensor kann vollständig in die Flüssigkeit eingetaucht werden. Die theoretischen Vorteile dieser Konstruktion sind die erhöhte Sensitivität und elektromechanische Kopplung, das reduzierte elektrische Übersprechen und die Minimierung von Störungen aufgrund von Druckschwankungen über der Membran. Somit ist aufgrund des verbesserten Signal zu Rausch Verhältnisses eine verbesserte Nachweisgrenze zu erwarten. In dieser Arbeit werden einfache Sensoren für die Prozessentwicklung entworfen, mit der das Fraunhofer Instituts für angewandte Festkörperphysik betraut war. Der Schwerpunkt dieser Arbeit liegt aber auf der analytischen Modellierung der Wellenausbreitung. Analytische Modelle zur Beschreibung der Mem ...']]
### GND ID:
['gnd:1100192352', 'gnd:4000988-9', 'gnd:4017621-6', 'gnd:4038824-4', 'gnd:4122795-5', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859664686']
### GND class:
['Katus, Philip', 'Akustik', 'Flüssigkeit', 'Sensor', 'Analyse']
<|eot_id|> |
3A859669815.jsonld | ['Characterisation of microglia-specific Tgfbr2, Smad4 and Tgfb1 knockout mice'] | ['Zusammenfassung: This thesis was conducted to describe the role of TGFβ mediated regulation of microglia homeostasis and activation. To this aim, I generated and characterised microglia-specific knockout mouse lines to analyse the importance of R-SMAD-dependent (mgTgfbr2-/-) and Co-SMAD-dependent (mgSmad4-/-) TGFβ signalling in microglia. Moreover, microglia-specific deletion of Tgfb1 (mgTgfb1-/-) was induced to address the effects of microglia-derived TGFβ1. According to the current literature, this is the first study using mouse lines with microglia-specific knockout of TGFβ signalling molecules.I could show that the generated mouse lines are valid models for the microglia-specific analysis of TGFβ signalling, as demonstrated by deletion on genomic and protein levels. Importantly, functional impairment of TGFβ signalling could be detected in vitro and in vivo. The knockout mice were used to reveal that microglial TGFβ signalling is not essential for microglia survival and maintenance, as no differences were seen in microglia cell numbers in vivo. Elevated cell numbers in vitro indicated an increased proliferative activity of mgTgfbr2-/- microglia. Furthermore, mice did not show any phenotypic differences with regard to body weight or survival. Additionally, using mgSmad4-/- mice, I could show that the expression of distinct TGFβ-induced genes was dependent on SMAD4. Interestingly, TGFβ-driven nuclear translocation of R-SMADs in microglia was independent on SMAD4.I could show that knockout of microglial Tgfbr2, but not of Smad4 or Tgfb1, led to an activated microglia phenotype under physiological conditions as reflected by increased expression activation markers CD86, CD206, CD36 and MHCII. mgTgfbr2-/- microglia also showed an increase of TAK1 phosphorylation as well as CCL2 and CXCL10 secretion. In contrast, knockout of Smad4 only led to a moderate increase of TAK1 phosphorylation and secretion of CCL3 and CCL4 in vitro. I could therefore show that the effects mgTgfbr2 and mgSmad4 knockout resulted in different outcome, indicating a major role of R-SMAD-dependent signalling in the regulation of microglia activation under physiological conditions. However, distinct and partially non-overlapping effects were detected in mgSmad4-/- microglia, indicating a contribution of Co-SMAD-dependent signalling for microglia quiescence. Exogenous TGFβ1 was no longer able to attenuate IFNγ-induced upregulation of the activation markers iNos and Tnfa in Tgfbr2 ...'] | ['gnd:1079427147', 'gnd:4169148-9', 'gnd:4301913-4', 'gnd:4671699-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859669815'] | ['Zöller, Tanja', 'Maus', 'Mikroglia', 'Knockout (Molekulargenetik)'] | Document
### Title: ['Characterisation of microglia-specific Tgfbr2, Smad4 and Tgfb1 knockout mice']
### Abstract:
['Zusammenfassung: This thesis was conducted to describe the role of TGFβ mediated regulation of microglia homeostasis and activation. To this aim, I generated and characterised microglia-specific knockout mouse lines to analyse the importance of R-SMAD-dependent (mgTgfbr2-/-) and Co-SMAD-dependent (mgSmad4-/-) TGFβ signalling in microglia. Moreover, microglia-specific deletion of Tgfb1 (mgTgfb1-/-) was induced to address the effects of microglia-derived TGFβ1. According to the current literature, this is the first study using mouse lines with microglia-specific knockout of TGFβ signalling molecules.I could show that the generated mouse lines are valid models for the microglia-specific analysis of TGFβ signalling, as demonstrated by deletion on genomic and protein levels. Importantly, functional impairment of TGFβ signalling could be detected in vitro and in vivo. The knockout mice were used to reveal that microglial TGFβ signalling is not essential for microglia survival and maintenance, as no differences were seen in microglia cell numbers in vivo. Elevated cell numbers in vitro indicated an increased proliferative activity of mgTgfbr2-/- microglia. Furthermore, mice did not show any phenotypic differences with regard to body weight or survival. Additionally, using mgSmad4-/- mice, I could show that the expression of distinct TGFβ-induced genes was dependent on SMAD4. Interestingly, TGFβ-driven nuclear translocation of R-SMADs in microglia was independent on SMAD4.I could show that knockout of microglial Tgfbr2, but not of Smad4 or Tgfb1, led to an activated microglia phenotype under physiological conditions as reflected by increased expression activation markers CD86, CD206, CD36 and MHCII. mgTgfbr2-/- microglia also showed an increase of TAK1 phosphorylation as well as CCL2 and CXCL10 secretion. In contrast, knockout of Smad4 only led to a moderate increase of TAK1 phosphorylation and secretion of CCL3 and CCL4 in vitro. I could therefore show that the effects mgTgfbr2 and mgSmad4 knockout resulted in different outcome, indicating a major role of R-SMAD-dependent signalling in the regulation of microglia activation under physiological conditions. However, distinct and partially non-overlapping effects were detected in mgSmad4-/- microglia, indicating a contribution of Co-SMAD-dependent signalling for microglia quiescence. Exogenous TGFβ1 was no longer able to attenuate IFNγ-induced upregulation of the activation markers iNos and Tnfa in Tgfbr2 ...']
### GND ID:
['gnd:1079427147', 'gnd:4169148-9', 'gnd:4301913-4', 'gnd:4671699-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859669815']
### GND class:
['Zöller, Tanja', 'Maus', 'Mikroglia', 'Knockout (Molekulargenetik)']
<|eot_id|> |
3A859681335.jsonld | ['The changing climate of food production : exploring consumer behavior and transformation in the food industry'] | ['Growing appreciation of the novel challenges of climate change and environmental degradation is among the core drivers of the ongoing transformation in the food industry. In response to the growing costs for society and the environment, the broad reliance on large-scale and industrial methods of food production is called into question. Innovative solutions and approaches are thus required, both to resolve distrust among consumers and facilitate the necessary transition towards more sustainable societies. Hence, this dissertation engages with a number of questions related to transformation in the food industry, highlighting the particular relevance of consumer behavior. Each of the four principal chapters represents a specific application of insights and knowledge gained using an individual-level perspective in order to resolve a number of shortcomings with the transitions literature. In this respect, the dissertation as a whole can be seen to inform the dialogue of what is required for such transitions and establish such discussions on firmer ground. The first chapter develops behavior-informed strategies for climate and sustainability policy by integrating insights of the individual-level determinants of environmentally-relevant behavior. The second chapter then makes use of a historically-informed systems analysis of industrial food production to explain the emergence and structural foundations of existing problems. Pivoting to a potential solution, the third chapter explores how exactly the type of retail format matters for sustainable consumption – using a hypothetical discrete choice experiment with opt-out option. Finally, the fourth chapter constructs a potential role for alternative retail formats as mechanisms for behavioral change by dynamically linking some of their salient features, through conceptual argumentation, to individual differences in the passion and energy of organic consumption.'] | ['gnd:1070869147', 'gnd:36164-1', 'gnd:4034889-1', 'gnd:4062644-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859681335'] | ['Baum, Chad M.', 'Friedrich-Schiller-Universität Jena', 'Lebensmittelindustrie', 'Verbraucherverhalten'] | Document
### Title: ['The changing climate of food production : exploring consumer behavior and transformation in the food industry']
### Abstract:
['Growing appreciation of the novel challenges of climate change and environmental degradation is among the core drivers of the ongoing transformation in the food industry. In response to the growing costs for society and the environment, the broad reliance on large-scale and industrial methods of food production is called into question. Innovative solutions and approaches are thus required, both to resolve distrust among consumers and facilitate the necessary transition towards more sustainable societies. Hence, this dissertation engages with a number of questions related to transformation in the food industry, highlighting the particular relevance of consumer behavior. Each of the four principal chapters represents a specific application of insights and knowledge gained using an individual-level perspective in order to resolve a number of shortcomings with the transitions literature. In this respect, the dissertation as a whole can be seen to inform the dialogue of what is required for such transitions and establish such discussions on firmer ground. The first chapter develops behavior-informed strategies for climate and sustainability policy by integrating insights of the individual-level determinants of environmentally-relevant behavior. The second chapter then makes use of a historically-informed systems analysis of industrial food production to explain the emergence and structural foundations of existing problems. Pivoting to a potential solution, the third chapter explores how exactly the type of retail format matters for sustainable consumption – using a hypothetical discrete choice experiment with opt-out option. Finally, the fourth chapter constructs a potential role for alternative retail formats as mechanisms for behavioral change by dynamically linking some of their salient features, through conceptual argumentation, to individual differences in the passion and energy of organic consumption.']
### GND ID:
['gnd:1070869147', 'gnd:36164-1', 'gnd:4034889-1', 'gnd:4062644-1', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859681335']
### GND class:
['Baum, Chad M.', 'Friedrich-Schiller-Universität Jena', 'Lebensmittelindustrie', 'Verbraucherverhalten']
<|eot_id|> |
3A859688763.jsonld | ['Synthesis and characterization of photocatalytically active [FeFe] hydrogenase subsite models'] | ['Silicon containing [FeFe] hydrogenase model complexes show interesting properties as sulfur protonation due to an increased basicity by o(Si-C)-3p(S) filled-filled interaction, reduced overpotential for proton reduction and the formation of a the rotated state under reductive conditions. With these model complexes the generation of H2 was only possible within electrocatalysis. In the present thesis a new approach was established with feasible synthetic pathways towards small and compact photocatalytic active [FeFe] hydrogenase model complexes with silicon containing heteroaromatic systems as the photosensitizer as well as one carbon analogue system directly imbedded into the bridging dithiolate unit. The synthesized model complexes as well as all other compounds were fully characterized by NMR and IR spectroscopy, mass spectrometry, elemental analysis, UV-vis and fluorescence spectroscopy, XRD analysis as well as cyclovoltammetry. Further theoretical studies were performed for a better understanding of these systems. Finally, comprehensive photocatalytic investigations were carried out. Within this work a turn-over number of 539 were reached under optimized conditions after 7 h irradiation, what represents an exceptionally turn-over frequency of 77 molecules H2/h. The approach of creating such small and compact [FeFe] hydrogenase model complexes makes this design to a powerful platform for proton reduction catalysts. A different aspect of this work was the utilization of the sterically bulky and silicon containing dithiolate as linker in a [FeFe] hydrogenase model compound for the investigation of the rotated state species of [FeIFeI] subsite models. Inspired by recently published results is reported an example with the highest degree of rotation so far (87,1°) for [FeIFeI] hydrogenase models without any agostic interactions (Fe…H-C).'] | ['gnd:1097622754', 'gnd:36164-1', 'gnd:4160910-4', 'gnd:4334250-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859688763'] | ['Goy, Roman', 'Friedrich-Schiller-Universität Jena', 'Hydrogenasen', 'Siliciumkomplexe'] | Document
### Title: ['Synthesis and characterization of photocatalytically active [FeFe] hydrogenase subsite models']
### Abstract:
['Silicon containing [FeFe] hydrogenase model complexes show interesting properties as sulfur protonation due to an increased basicity by o(Si-C)-3p(S) filled-filled interaction, reduced overpotential for proton reduction and the formation of a the rotated state under reductive conditions. With these model complexes the generation of H2 was only possible within electrocatalysis. In the present thesis a new approach was established with feasible synthetic pathways towards small and compact photocatalytic active [FeFe] hydrogenase model complexes with silicon containing heteroaromatic systems as the photosensitizer as well as one carbon analogue system directly imbedded into the bridging dithiolate unit. The synthesized model complexes as well as all other compounds were fully characterized by NMR and IR spectroscopy, mass spectrometry, elemental analysis, UV-vis and fluorescence spectroscopy, XRD analysis as well as cyclovoltammetry. Further theoretical studies were performed for a better understanding of these systems. Finally, comprehensive photocatalytic investigations were carried out. Within this work a turn-over number of 539 were reached under optimized conditions after 7 h irradiation, what represents an exceptionally turn-over frequency of 77 molecules H2/h. The approach of creating such small and compact [FeFe] hydrogenase model complexes makes this design to a powerful platform for proton reduction catalysts. A different aspect of this work was the utilization of the sterically bulky and silicon containing dithiolate as linker in a [FeFe] hydrogenase model compound for the investigation of the rotated state species of [FeIFeI] subsite models. Inspired by recently published results is reported an example with the highest degree of rotation so far (87,1°) for [FeIFeI] hydrogenase models without any agostic interactions (Fe…H-C).']
### GND ID:
['gnd:1097622754', 'gnd:36164-1', 'gnd:4160910-4', 'gnd:4334250-4', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859688763']
### GND class:
['Goy, Roman', 'Friedrich-Schiller-Universität Jena', 'Hydrogenasen', 'Siliciumkomplexe']
<|eot_id|> |
3A859699668.jsonld | ['Synthesis of jasmonates and derivatives to study plant signaling : activation, translocation and shutdown mechanisms'] | ['Endogenous jasmonates (plant hormones) and synthetic derivatives were synthetized to study different aspects of plant signaling. In a first study, new evidence of the close relationship between the Ca2+- and JA- signaling pathways is provided. It is reported that the antibiotic neomycin selectively blocks the Ca2+ elevation induced by oral secretions of Spodoptera littoralis larvae and consequently inhibit the accumulation of the active jasmonate JA-Ile in the leaves of Arabidopsis thaliana plants. A second study uses a fluorinated mimic of the JA precursor OPC-8:0 as a molecular probe to study its metabolism in planta. The fluorinated compound and derived metabolites can be detected by UHPLC-MS/MS easily. The fluorinated OPC-8:0 can be translocated from damaged to undamaged systemic leaves. This result suggests that OPC-8:0 ─ in addition to JA and JA-Ile ─ may also contribute to propagate the mobile signal which induces systemic defense responses in plants. The third case of study reports on the possibility of manipulating the JA-signalling pathway by modifying the endogenous ligand JA-Ile. Based on the crystal structure of the JA-Ile receptor, two JA-Ile derived macrolactones were prepared. Both synthetic lactones induce nicotine accumulation to a similar extent as MeJA does in Nicotiana attenuata leaves. Finally, the JA-Ile inactivation mechanism upon ω-hydroxylation is investigated by using a chemical approach. It was found that impaired activity of 12-OH-JA-Ile is likely due to steric hindrance caused by the ω–OH. Furthermore, a convenient synthesis of 12-modified jasmonates is described. The methods discussed in this Dissertation should complement established molecular biology techniques to study plant physiology. New knowledge of the molecular mechanism of JA-Ile signalling ─ from early events like Ca2+-induced JA-Ile burst, until late events like the switch-off of the jasmonate signal ─ is presented.'] | ['gnd:109762224X', 'gnd:36164-1', 'gnd:4069806-3', 'gnd:4318717-1', 'gnd:4526402-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859699668'] | ['Jiménez-Alemán, Guillermo Hugo', 'Friedrich-Schiller-Universität Jena', 'Calcium', 'Signaltransduktion', 'Jasmonate'] | Document
### Title: ['Synthesis of jasmonates and derivatives to study plant signaling : activation, translocation and shutdown mechanisms']
### Abstract:
['Endogenous jasmonates (plant hormones) and synthetic derivatives were synthetized to study different aspects of plant signaling. In a first study, new evidence of the close relationship between the Ca2+- and JA- signaling pathways is provided. It is reported that the antibiotic neomycin selectively blocks the Ca2+ elevation induced by oral secretions of Spodoptera littoralis larvae and consequently inhibit the accumulation of the active jasmonate JA-Ile in the leaves of Arabidopsis thaliana plants. A second study uses a fluorinated mimic of the JA precursor OPC-8:0 as a molecular probe to study its metabolism in planta. The fluorinated compound and derived metabolites can be detected by UHPLC-MS/MS easily. The fluorinated OPC-8:0 can be translocated from damaged to undamaged systemic leaves. This result suggests that OPC-8:0 ─ in addition to JA and JA-Ile ─ may also contribute to propagate the mobile signal which induces systemic defense responses in plants. The third case of study reports on the possibility of manipulating the JA-signalling pathway by modifying the endogenous ligand JA-Ile. Based on the crystal structure of the JA-Ile receptor, two JA-Ile derived macrolactones were prepared. Both synthetic lactones induce nicotine accumulation to a similar extent as MeJA does in Nicotiana attenuata leaves. Finally, the JA-Ile inactivation mechanism upon ω-hydroxylation is investigated by using a chemical approach. It was found that impaired activity of 12-OH-JA-Ile is likely due to steric hindrance caused by the ω–OH. Furthermore, a convenient synthesis of 12-modified jasmonates is described. The methods discussed in this Dissertation should complement established molecular biology techniques to study plant physiology. New knowledge of the molecular mechanism of JA-Ile signalling ─ from early events like Ca2+-induced JA-Ile burst, until late events like the switch-off of the jasmonate signal ─ is presented.']
### GND ID:
['gnd:109762224X', 'gnd:36164-1', 'gnd:4069806-3', 'gnd:4318717-1', 'gnd:4526402-8', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859699668']
### GND class:
['Jiménez-Alemán, Guillermo Hugo', 'Friedrich-Schiller-Universität Jena', 'Calcium', 'Signaltransduktion', 'Jasmonate']
<|eot_id|> |
3A859700542.jsonld | ['Systematic molecular and phenotypic investigation of speltoid off-types in bread wheat germplasm'] | [['Speltoid off-types; Triticumaestivum; Q gene; Aneuploidy; Quantitative Pyrosequencing; Q gene expression; Genotypic and environmental causes', 'Speltoide Abweicher; Triticumaestivum; QGen; Aneuploidie; Quantitative Pyrosequenzierung; Q Genexpression; Genotypische und umweltbedingte Einflüsse', 'Speltoid bread wheat plants are phenotypically characterized by pyramidal spikes and tenacious glumes. The occurrence during official licensing tests is one major cause for the rejection cultivar candidate. The presented study focuses on genetic and phenotypic investigations of speltoids off-types. A pyrosequencing assay enabling the detection of speltoid bread wheat plants in seedling stage is presented. The verification in bread wheat germplasm is associated with a reduced 5AQ gene copy number. The Q gene is one of the major domestication genes causing the free-threshing character in bread wheat plants and the speltoid phenotype is most likely explainable due to the loss of the chromosome 5A. Further, a reduced expression level of Q is measured and pleiotropic morphological alterations governed by Q are observed. Field trial analysis revealed genotypic and environmental causes for the inheritance of speltoids or aneuploid plants. Breeding strategies to avoid them are discussed.', 'Speltoide Brotweizen sind phänotypisch durch spitze Ähren und feste Spelzen gekennzeichnet. Das Auftreten im Rahmen von offiziellen Prüfungen ist einer der Hauptgründe für die Ablehnung eines Sortenkandiaten. Die vorliegende Arbeit befasst sich mit systematischen molekularen und phänotypischen Untersuchungen von Speltoiden zur Züchtung homogener Weizensorten. Mittels Pyrosequenzierung ist die Detektion von Speltoiden im Keimlingsstadium möglich, wobei Abweicher im Brotweizen eine reduzierte 5AQ Kopienzahl zeigen. Die Evolution des Domestikationsgenes Q führte zur Domestizierung von freidreschendem Weizen. Der speltoide Phänotyp steht im direkten Zusammenhang mit dem Verlust des Chromosoms 5A inklusive Q, einem reduzierter Expressionslevel von Q,sowie pleiotrope Veränderungen auf morphologische Merkmale. Feldversuche zeigen genotypische und umweltbedingte Einflüsse zur Vererbung von Speltoiden bzw. Aneuploiden. Züchterische Vermeidungsstrategien sind im Rahmen dieser Arbeit diskutiert.']] | ['gnd:2024276-1', 'gnd:4020136-3', 'gnd:4065287-7', 'gnd:4112524-1', 'gnd:4124348-1', 'gnd:4157211-7', 'gnd:4601328-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859700542'] | ['Martin-Luther-Universität Halle-Wittenberg', 'Genexpression', 'Weizen', 'Aneuploidie', 'Umweltfaktor', 'Getreidezüchtung', 'Genotyp'] | Document
### Title: ['Systematic molecular and phenotypic investigation of speltoid off-types in bread wheat germplasm']
### Abstract:
[['Speltoid off-types; Triticumaestivum; Q gene; Aneuploidy; Quantitative Pyrosequencing; Q gene expression; Genotypic and environmental causes', 'Speltoide Abweicher; Triticumaestivum; QGen; Aneuploidie; Quantitative Pyrosequenzierung; Q Genexpression; Genotypische und umweltbedingte Einflüsse', 'Speltoid bread wheat plants are phenotypically characterized by pyramidal spikes and tenacious glumes. The occurrence during official licensing tests is one major cause for the rejection cultivar candidate. The presented study focuses on genetic and phenotypic investigations of speltoids off-types. A pyrosequencing assay enabling the detection of speltoid bread wheat plants in seedling stage is presented. The verification in bread wheat germplasm is associated with a reduced 5AQ gene copy number. The Q gene is one of the major domestication genes causing the free-threshing character in bread wheat plants and the speltoid phenotype is most likely explainable due to the loss of the chromosome 5A. Further, a reduced expression level of Q is measured and pleiotropic morphological alterations governed by Q are observed. Field trial analysis revealed genotypic and environmental causes for the inheritance of speltoids or aneuploid plants. Breeding strategies to avoid them are discussed.', 'Speltoide Brotweizen sind phänotypisch durch spitze Ähren und feste Spelzen gekennzeichnet. Das Auftreten im Rahmen von offiziellen Prüfungen ist einer der Hauptgründe für die Ablehnung eines Sortenkandiaten. Die vorliegende Arbeit befasst sich mit systematischen molekularen und phänotypischen Untersuchungen von Speltoiden zur Züchtung homogener Weizensorten. Mittels Pyrosequenzierung ist die Detektion von Speltoiden im Keimlingsstadium möglich, wobei Abweicher im Brotweizen eine reduzierte 5AQ Kopienzahl zeigen. Die Evolution des Domestikationsgenes Q führte zur Domestizierung von freidreschendem Weizen. Der speltoide Phänotyp steht im direkten Zusammenhang mit dem Verlust des Chromosoms 5A inklusive Q, einem reduzierter Expressionslevel von Q,sowie pleiotrope Veränderungen auf morphologische Merkmale. Feldversuche zeigen genotypische und umweltbedingte Einflüsse zur Vererbung von Speltoiden bzw. Aneuploiden. Züchterische Vermeidungsstrategien sind im Rahmen dieser Arbeit diskutiert.']]
### GND ID:
['gnd:2024276-1', 'gnd:4020136-3', 'gnd:4065287-7', 'gnd:4112524-1', 'gnd:4124348-1', 'gnd:4157211-7', 'gnd:4601328-3', 'https://www.tib.eu/de/suchen/id/TIBKAT%3A859700542']
### GND class:
['Martin-Luther-Universität Halle-Wittenberg', 'Genexpression', 'Weizen', 'Aneuploidie', 'Umweltfaktor', 'Getreidezüchtung', 'Genotyp']
<|eot_id|> |
Subsets and Splits