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1401.1773
Mustafa Elsheikh
Mustafa Elsheikh, Mark Giesbrecht
Relating $p$-adic eigenvalues and the local Smith normal form
To appear in Linear Algebra and Its Applications
null
10.1016/j.laa.2015.05.001
null
math.RA cs.SC math.PR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Conditions are established under which the $p$-adic valuations of the invariant factors (diagonal entries of the Smith form) of an integer matrix are equal to the $p$-adic valuations of the eigenvalues. It is then shown that this correspondence is the typical case for "most" matrices; precise density bounds are given for when the property holds, as well as easy transformations to this typical case.
[ { "created": "Wed, 8 Jan 2014 18:42:52 GMT", "version": "v1" }, { "created": "Thu, 1 May 2014 19:24:18 GMT", "version": "v2" }, { "created": "Mon, 22 Sep 2014 00:52:42 GMT", "version": "v3" }, { "created": "Thu, 7 May 2015 15:21:46 GMT", "version": "v4" } ]
2015-05-08
[ [ "Elsheikh", "Mustafa", "" ], [ "Giesbrecht", "Mark", "" ] ]
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1401.1778
Vignesh Jagadeesh
Vignesh Jagadeesh, Robinson Piramuthu, Anurag Bhardwaj, Wei Di, Neel Sundaresan
Large Scale Visual Recommendations From Street Fashion Images
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null
null
null
cs.CV
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We describe a completely automated large scale visual recommendation system for fashion. Our focus is to efficiently harness the availability of large quantities of online fashion images and their rich meta-data. Specifically, we propose four data driven models in the form of Complementary Nearest Neighbor Consensus, Gaussian Mixture Models, Texture Agnostic Retrieval and Markov Chain LDA for solving this problem. We analyze relative merits and pitfalls of these algorithms through extensive experimentation on a large-scale data set and baseline them against existing ideas from color science. We also illustrate key fashion insights learned through these experiments and show how they can be employed to design better recommendation systems. Finally, we also outline a large-scale annotated data set of fashion images (Fashion-136K) that can be exploited for future vision research.
[ { "created": "Wed, 8 Jan 2014 19:10:55 GMT", "version": "v1" } ]
2014-01-09
[ [ "Jagadeesh", "Vignesh", "" ], [ "Piramuthu", "Robinson", "" ], [ "Bhardwaj", "Anurag", "" ], [ "Di", "Wei", "" ], [ "Sundaresan", "Neel", "" ] ]
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1401.1779
Martin Leitgab Ph.D.
M. Leitgab, A. Cowley
Towards Space Solar Power - Examining Atmospheric Interactions of Power Beams with the HAARP Facility
7 pages, 3 figures; to be published in IEEE Xplore, in Proceedings to IEEE Aerospace 2014 Conference, Mar 1 - 8, 2014, Big Sky, MT, USA
null
10.1109/AERO.2014.6836471
null
physics.space-ph astro-ph.IM
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In the most common space solar power (SSP) system architectures, solar energy harvested by large satellites in geostationary orbit is transmitted to Earth via microwave radiation. Currently, only limited information about the interactions of microwave beams with energy densities of several tens to hundreds of W/m$^2$ with the different layers of the atmosphere is available. Governmental bodies will likely require detailed investigations of safety and atmospheric effects of microwave power beams before issuing launch licenses for SSP satellite systems. This paper proposes to collect representative and comprehensive data of the interaction of power beams with the atmosphere by extending the infrastructure of the High Frequency Active Auroral Research Program (HAARP) facility in Alaska, USA. Estimates of the transmission infrastructure performance as well as measurement devices and scientific capabilities of possible upgrade scenarios will be discussed. The proposed upgrade of the HAARP facility is expected to deliver a wealth of data and information which could serve as a decision base for governmental launch licensing of SSP satellites, and which can be used in addition to deepen public acceptance of SSP as a large-scale renewable energy source. Copyright 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
[ { "created": "Wed, 8 Jan 2014 19:11:16 GMT", "version": "v1" } ]
2016-11-17
[ [ "Leitgab", "M.", "" ], [ "Cowley", "A.", "" ] ]
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1401.1783
Joydeep Banerjee
Arunabha Sen, Anisha Mazumder, Joydeep Banerjee, Arun Das and Randy Compton
Identification of $\cal K$ Most Vulnerable Nodes in Multi-layered Network Using a New Model of Interdependency
6 pages, 4 figures, submitted to NetSciCom 2014
null
null
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The critical infrastructures of the nation including the power grid and the communication network are highly interdependent. Recognizing the need for a deeper understanding of the interdependency in a multi-layered network, significant efforts have been made by the research community in the last few years to achieve this goal. Accordingly a number of models have been proposed and analyzed. Unfortunately, most of the models are over simplified and, as such, they fail to capture the complex interdependency that exists between entities of the power grid and the communication networks involving a combination of conjunctive and disjunctive relations. To overcome the limitations of existing models, we propose a new model that is able to capture such complex interdependency relations. Utilizing this model, we provide techniques to identify the $\cal K$ most vulnerable nodes of an interdependent network. We show that the problem can be solved in polynomial time in some special cases, whereas for some others, the problem is NP-complete. We establish that this problem is equivalent to computation of a {\em fixed point} of a multilayered network system and we provide a technique for its computation utilizing Integer Linear Programming. Finally, we evaluate the efficacy of our technique using real data collected from the power grid and the communication network that span the Maricopa County of Arizona.
[ { "created": "Wed, 8 Jan 2014 19:32:27 GMT", "version": "v1" } ]
2014-01-09
[ [ "Sen", "Arunabha", "" ], [ "Mazumder", "Anisha", "" ], [ "Banerjee", "Joydeep", "" ], [ "Das", "Arun", "" ], [ "Compton", "Randy", "" ] ]
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1401.1790
Padmini Rangamani
Padmini Rangamani, Kranthi Kiran Mandadapu and George Oster
Protein-induced membrane curvature changes membrane tension
15 pages, 5 figures
null
10.1016/j.bpj.2014.06.010
null
q-bio.CB cond-mat.soft cond-mat.stat-mech physics.bio-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Adsorption of proteins onto membranes can alter the local membrane curvature. This phenomenon has been observed in biological processes such as endocytosis, tubulation and vesiculation. However, it is not clear how the local surface properties of the membrane, such as membrane tension, change in response to protein adsorption. In this paper, we show that the classical elastic model of lipid membranes cannot account for simultaneous changes in shape and membrane tension due to protein adsorption in a local region, and a viscous-elastic formulation is necessary to fully describe the system. Therefore, we develop a viscous-elastic model for inhomogeneous membranes of the Helfrich type. Using the new viscous-elastic model, we find that the lipids flow to accommodate changes in membrane curvature during protein adsorption. We show that, at the end of protein adsorption process, the system sustains a residual local tension to balance the difference between the actual mean curvature and the imposed spontaneous curvatures. This change in membrane tension can have a functional impact in many biological phenomena where proteins interact with membranes.
[ { "created": "Wed, 8 Jan 2014 19:49:38 GMT", "version": "v1" } ]
2016-04-28
[ [ "Rangamani", "Padmini", "" ], [ "Mandadapu", "Kranthi Kiran", "" ], [ "Oster", "George", "" ] ]
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1401.1800
Srikanth Radhakrishna
Chetan S. Mandayam Nayakar and R. Srikanth
G\"odel, Tarski, Turing and the conundrum of free will
To appear as a chapter in "Nature's Longest Threads: New Frontiers in the Mathematics and Physics of Information in Biology", eds: J. Balakrishnan and B.V. Sreekantan, to be published under book series: "World Scientific Lecture Notes in Complex Systems"; extends connection to uncomputability proposed in arXiv:1210.6301, and physical considerations of arXiv:1202.4440; Supersedes arXiv:1011.4898
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physics.hist-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The problem of defining and locating free will (FW) in physics is studied. On basis of logical paradoxes, we argue that FW has a meta-theoretic character, like the concept of truth in Tarski's undefinability theorem. Free will exists relative to a base theory if there is freedom to deviate from the deterministic or indeterministic dynamics in the theory, with the deviations caused by parameters (representing will) in the meta-theory. By contrast, determinism and indeterminism do not require meta-theoretic considerations in their formalization, making FW a fundamentally new causal primitive. FW exists relative to the meta-theory if there is freedom for deviation, due to higher-order causes. Absolute free will, which corresponds to our intuitive introspective notion of free will, exists if this meta-theoretic hierarchy is infinite. We argue that this hierarchy corresponds to higher levels of uncomputability. In other words, at any finitely high order in the hierarchy, there are uncomputable deviations from the law at that order. Applied to the human condition, the hierarchy corresponds to deeper levels of the subconscious or unconscious mind. Possible ramifications of our model for physics, neuroscience and artificial intelligence (AI) are briefly considered.
[ { "created": "Wed, 8 Jan 2014 20:20:59 GMT", "version": "v1" } ]
2014-01-09
[ [ "Nayakar", "Chetan S. Mandayam", "" ], [ "Srikanth", "R.", "" ] ]
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1401.1803
Stanislas Lauly
Stanislas Lauly, Alex Boulanger, Hugo Larochelle
Learning Multilingual Word Representations using a Bag-of-Words Autoencoder
This workshop paper was accepted on Octoble 30 2013 at the NIPS 2013 workshop on deep learning (https://sites.google.com/site/deeplearningworkshopnips2013/accepted-papers)
null
null
null
cs.CL cs.LG stat.ML
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Recent work on learning multilingual word representations usually relies on the use of word-level alignements (e.g. infered with the help of GIZA++) between translated sentences, in order to align the word embeddings in different languages. In this workshop paper, we investigate an autoencoder model for learning multilingual word representations that does without such word-level alignements. The autoencoder is trained to reconstruct the bag-of-word representation of given sentence from an encoded representation extracted from its translation. We evaluate our approach on a multilingual document classification task, where labeled data is available only for one language (e.g. English) while classification must be performed in a different language (e.g. French). In our experiments, we observe that our method compares favorably with a previously proposed method that exploits word-level alignments to learn word representations.
[ { "created": "Wed, 8 Jan 2014 20:36:57 GMT", "version": "v1" } ]
2014-01-09
[ [ "Lauly", "Stanislas", "" ], [ "Boulanger", "Alex", "" ], [ "Larochelle", "Hugo", "" ] ]
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1401.1808
Donald Chang
Donald C. Chang
Using biophotonics to study signaling mechanisms in a single living cell
10 pages, 4 figures
Intl J Mod Phys B, 21 (23/24):4091-4103, 2007
10.1142/S0217979207045268
null
physics.bio-ph q-bio.MN
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
To illustrate the power of the biophysical approach in solving important problems in life science, I present here one of our current research projects as an example. We have developed special biophotonic techniques to study the dynamic properties of signaling proteins in a single living cell. Such a study allowed us to gain new insight into the signaling mechanism that regulates programmed cell death.
[ { "created": "Wed, 8 Jan 2014 10:40:43 GMT", "version": "v1" } ]
2014-01-10
[ [ "Chang", "Donald C.", "" ] ]
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1401.1826
Nicholas Nelson
Nicholas J. Nelson and Mark S. Miesch
Generating buoyant magnetic flux ropes in solar-like convective dynamos
16 pages, 6 figures, accepted for publication in Plasma Physics and Controlled Fusion special issue "Self-Organization in Magnetic Flux Ropes"
null
10.1088/0741-3335/56/6/064004
LA-UR-13-28610
astro-ph.SR physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Our Sun exhibits strong convective dynamo action which results in magnetic flux bundles emerging through the stellar surface as magnetic spots. Global-scale dynamo action is believed to generate large-scale magnetic structures in the deep solar interior through the interplay of convection, rotation, and shear. Portions of these large-scale magnetic structures are then believed to rise through the convective layer, forming magnetic loops which then pierce the photosphere as sunspot pairs. Previous global simulations of 3D MHD convection in rotating spherical shells have demonstrated mechanisms whereby large-scale magnetic wreaths can be generated in the bulk of the convection zone. Our recent simulations have achieved sufficiently high levels of turbulence to permit portions of these wreaths to become magnetically buoyant and rise through the simulated convective layer through a combination of magnetic buoyancy and advection by convective giant cells. These buoyant magnetic loops are created in the bulk of the convective layer as strong Lorentz force feedback in the cores of the magnetic wreaths dampen small-scale convective motions, permitting the amplification of local magnetic energies to over 100 times the local kinetic energy. While the magnetic wreaths are largely generated the shearing of axisymmetric poloidal magnetic fields by axisymmetric rotational shear (the $\Omega$-effect), the loops are amplified to their peak field strengths before beginning to rise by non-axisymmetric processes. This further extends and enhances a new paradigm for the generation of emergent magnetic flux bundles, which we term turbulence-enabled magnetic buoyancy.
[ { "created": "Wed, 8 Jan 2014 21:03:26 GMT", "version": "v1" } ]
2014-03-05
[ [ "Nelson", "Nicholas J.", "" ], [ "Miesch", "Mark S.", "" ] ]
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1401.1828
Anne Sa{\ss}
Anne Sa{\ss}, Ralf Forge, Stavros Christopoulos, Katharina Knicker, Peter Moroshkin, and Martin Weitz
Laser cooling of dense atomic gases by collisional redistribution of radiation and spectroscopy of molecular dimers in a dense buffer gas environment
8 pages, 7 figures
Proc. SPIE 9000, 90000A (2014)
10.1117/12.2035630
null
physics.atom-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study laser cooling of atomic gases by collisional redistribution of fluorescence. In a high pressure buffer gas regime, frequent collisions perturb the energy levels of alkali atoms, which allows for the absorption of a far red detuned irradiated laser beam. Subsequent spontaneous decay occurs close to the unperturbed resonance frequency, leading to a cooling of the dense gas mixture by redistribution of fluorescence. Thermal deflection spectroscopy indicates large relative temperature changes down to and even below room temperature starting from an initial cell temperature near 700 K. We are currently performing a detailed analysis of the temperature distribution in the cell. As we expect this cooling technique to work also for molecular-noble gas mixtures, we also present initial spectroscopic experiments on alkali-dimers in a dense buffer gas surrounding.
[ { "created": "Wed, 8 Jan 2014 21:05:53 GMT", "version": "v1" } ]
2014-10-30
[ [ "Saß", "Anne", "" ], [ "Forge", "Ralf", "" ], [ "Christopoulos", "Stavros", "" ], [ "Knicker", "Katharina", "" ], [ "Moroshkin", "Peter", "" ], [ "Weitz", "Martin", "" ] ]
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1401.1842
Shuchin Aeron
Jason Gejie Liu and Shuchin Aeron
Robust Large Scale Non-negative Matrix Factorization using Proximal Point Algorithm
Appeared in IEEE GlobalSIP, 2013, TX, Austin
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null
null
stat.ML cs.IT cs.LG cs.NA math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A robust algorithm for non-negative matrix factorization (NMF) is presented in this paper with the purpose of dealing with large-scale data, where the separability assumption is satisfied. In particular, we modify the Linear Programming (LP) algorithm of [9] by introducing a reduced set of constraints for exact NMF. In contrast to the previous approaches, the proposed algorithm does not require the knowledge of factorization rank (extreme rays [3] or topics [7]). Furthermore, motivated by a similar problem arising in the context of metabolic network analysis [13], we consider an entirely different regime where the number of extreme rays or topics can be much larger than the dimension of the data vectors. The performance of the algorithm for different synthetic data sets are provided.
[ { "created": "Wed, 8 Jan 2014 21:39:03 GMT", "version": "v1" } ]
2014-01-10
[ [ "Liu", "Jason Gejie", "" ], [ "Aeron", "Shuchin", "" ] ]
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1401.1845
Brendan McNally
B.D. McNally (1), S. Coleman (1), W.K. Warburton (1), J. Autran (2), B.M. Clark (3), J. Cooley (4), M.S. Gordon (5), and Z. Zhu (6) ((1) XIA LLC, (2) Aix-Marseille Univ, (3) Honeywell, (4) Southern Methodist Univ, (5) IBM TJ Watson, (6) IBM SRDC)
Sources of Variability in Alpha Emissivity Measurements at LA and ULA Levels, a Multicenter Study
7 pages, 8 figures, 4 tables; Fixed typos, added discussion on potential for positive systematic bias per reviewer comments, quick formatting refresh. Accepted for publication in Nucl. Instr. and Meth. in Phys. Res. A
Nuclear Inst. and Methods in Physics Research, A 750C (2014), pp. 96-102
10.1016/j.nima.2014.02.052
null
physics.ins-det
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Alpha emissivity measurements are important in the semiconductor industry for assessing the suitability of materials for use in production processes. A recently published round-robin study that circulated the same samples to several alpha counting centers showed wide center-to-center variations in measured alpha emissivity. A separate analysis of these results hypothesized that much of the variation might arise from differences in sample-to-entrance window separations. XIA recently introduced an ultra low background counter, the UltraLo-1800 (UltraLo), that operates in a fundamentally different manner from the proportional counters used at most of the centers in the original study. In particular, by placing the sample within the counting volume, it eliminates the sample-to-entrance window separation issue noted above, and so offers an opportunity to test this hypothesis. In this work we briefly review how the UltraLo operates and describe a new round-robin study conducted entirely on UltraLo instruments using a set of standard samples that included two samples used in the original study. This study shows that, for LA (Low Alpha between 2 and 50 alpha/khr-cm$^2$) sample measurements, the only remaining site-to-site variations were due to counting statistics. Variations in ULA (Ultra-Low Alpha < 2 alpha/khr-cm$^2$) sample measurements were reduced three-fold, compared to the earlier study, with the measurements suggesting that residual activity variations now primarily arise from site-to-site differences in the cosmogenic background.
[ { "created": "Wed, 8 Jan 2014 21:45:57 GMT", "version": "v1" }, { "created": "Tue, 4 Mar 2014 00:24:16 GMT", "version": "v2" } ]
2014-04-17
[ [ "McNally", "B. D.", "" ], [ "Coleman", "S.", "" ], [ "Warburton", "W. K.", "" ], [ "Autran", "J.", "" ], [ "Clark", "B. M.", "" ], [ "Cooley", "J.", "" ], [ "Gordon", "M. S.", "" ], [ "Zhu", "Z.", "" ] ]
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1401.1847
Jean-Francois Berret
Nina K. Iversen, Sebastian Frische, Karen Thomsen, Christoffer Laustsen, Michael Pedersen, Pernille B.L. Hansen, Peter Bie, J\'erome Fresnais, Jean-Francois Berret, Erik Baatrup and Tobias Wang
Superparamagnetic iron oxide polyacrylic acid coated {\gamma}-Fe2O3 nanoparticles does not affect kidney function but causes acute effect on the cardiovascular function in healthy mice
21 pages, 12 figures, published in Toxicology and Applied Pharmacology 2013
null
10.1016/j.taap.2012.10.014
null
physics.med-ph physics.bio-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This study describes the distribution of intravenously injected polyacrylic acid (PAA) coated {\gamma}-Fe2O3 NPs (10 mg kg-1) at the organ, cellular and subcellular levels in healthy BALB/cJ mice and in parallel addresses the effects of NP injection on kidney function, blood pressure and vascular contractility. Magnetic resonance imaging (MRI) and transmission electron microscopy (TEM) showed accumulation of NPs in the liver within 1h after intravenous infusion, accommodated by intracellular uptake in endothelial and Kupffer cells with subsequent intracellular uptake in renal cells, particularly the cytoplasm of the proximal tubule, in podocytes and mesangial cells. The renofunctional effects of NPs were evaluated by arterial acid-base status and measurements of glomerular filtration rate (GFR) after instrumentation with chronically indwelling catheters. Arterial pH was 7.46 and 7.41 in mice 0.5 h after injections of saline or NP, and did not change over the next 12h. In addition, the injections of NP did not affect arterial PCO2 or [HCO3-] either. Twenty-four and 96h after NP injections, the GFR averaged 11.0 and 13.0 ml min-1 g-1, respectively, values which were statistically comparable with controls (14.0 and 14.0 ml min-1 g-1). Mean arterial blood pressure (MAP) decreased 12-24h after NP injections (111 vs 123 min-1) associated with a decreased contractility of small mesenteric arteries revealed by myography to characterise endothelial function. In conclusion, our study demonstrates that accumulation of superparamagnetic iron oxide nanoparticles does not affect kidney function in healthy mice but temporarily decreases blood pressure.
[ { "created": "Tue, 7 Jan 2014 08:46:16 GMT", "version": "v1" } ]
2014-01-10
[ [ "Iversen", "Nina K.", "" ], [ "Frische", "Sebastian", "" ], [ "Thomsen", "Karen", "" ], [ "Laustsen", "Christoffer", "" ], [ "Pedersen", "Michael", "" ], [ "Hansen", "Pernille B. L.", "" ], [ "Bie", "Peter", "" ], [ "Fresnais", "Jérome", "" ], [ "Berret", "Jean-Francois", "" ], [ "Baatrup", "Erik", "" ], [ "Wang", "Tobias", "" ] ]
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1401.1849
Matthew Steven Bauer
Matthew Steven Bauer (University of Illinois at Urbana-Champaign)
The Computational Complexity of Propositional Cirquent Calculus
null
Logical Methods in Computer Science, Volume 11, Issue 1 (March 25, 2015) lmcs:1127
10.2168/LMCS-11(1:12)2015
null
cs.LO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Introduced in 2006 by Japaridze, cirquent calculus is a refinement of sequent calculus. The advent of cirquent calculus arose from the need for a deductive system with a more explicit ability to reason about resources. Unlike the more traditional proof-theoretic approaches that manipulate tree-like objects (formulas, sequents, etc.), cirquent calculus is based on circuit-style structures called cirquents, in which different "peer" (sibling, cousin, etc.) substructures may share components. It is this resource sharing mechanism to which cirquent calculus owes its novelty (and its virtues). From its inception, cirquent calculus has been paired with an abstract resource semantics. This semantics allows for reasoning about the interaction between a resource provider and a resource user, where resources are understood in the their most general and intuitive sense. Interpreting resources in a more restricted computational sense has made cirquent calculus instrumental in axiomatizing various fundamental fragments of Computability Logic, a formal theory of (interactive) computability. The so-called "classical" rules of cirquent calculus, in the absence of the particularly troublesome contraction rule, produce a sound and complete system CL5 for Computability Logic. In this paper, we investigate the computational complexity of CL5, showing it is $\Sigma_2^p$-complete. We also show that CL5 without the duplication rule has polynomial size proofs and is NP-complete.
[ { "created": "Wed, 8 Jan 2014 22:24:10 GMT", "version": "v1" }, { "created": "Fri, 10 Jan 2014 22:27:45 GMT", "version": "v2" }, { "created": "Thu, 25 Sep 2014 01:08:25 GMT", "version": "v3" }, { "created": "Tue, 24 Mar 2015 09:05:44 GMT", "version": "v4" } ]
2015-07-01
[ [ "Bauer", "Matthew Steven", "", "University of Illinois at Urbana-Champaign" ] ]
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1401.1859
Akito Kusaka
Akito Kusaka, Edward J. Wollack and Thomas R. Stevenson
Angular and Polarization Response of Multimode Sensors with Resistive-Grid Absorbers
22 pages, 15 figures
J. Opt. Soc. Am. A 31, 1557-1576 (2014)
10.1364/JOSAA.31.001557
null
astro-ph.IM astro-ph.CO physics.ins-det physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
High sensitivity receiver systems with near ideal polarization sensitivity are highly desirable for development of millimeter and sub-millimeter radio astronomy. Multimoded bolometers provide a unique solution to achieve such sensitivity, for which hundreds of single-mode sensors would otherwise be required. The primary concern in employing such multimoded sensors for polarimetery is the control of the polarization systematics. In this paper, we examine the angular- and polarization- dependent absorption pattern of a thin resistive grid or membrane, which models an absorber used for a multimoded bolometer. The result shows that a freestanding thin resistive absorber with a surface resistivity of \eta/2, where \eta\ is the impedance of free space, attains a beam pattern with equal E- and H-plane responses, leading to zero cross polarization. For a resistive-grid absorber, the condition is met when a pair of grids is positioned orthogonal to each other and both have a resistivity of \eta/2. When a reflective backshort termination is employed to improve absorption efficiency, the cross-polar level can be suppressed below -30 dB if acceptance angle of the sensor is limited to <60degrees. The small cross-polar systematics have even-parity patterns and do not contaminate the measurements of odd-parity polarization patterns, for which many of recent instruments for cosmic microwave background are designed. Underlying symmetry that suppresses these cross-polar systematics is discussed in detail. The estimates and formalism provided in this paper offer key tools in the design consideration of the instruments using the multimoded polarimeters.
[ { "created": "Wed, 8 Jan 2014 23:36:37 GMT", "version": "v1" } ]
2014-07-10
[ [ "Kusaka", "Akito", "" ], [ "Wollack", "Edward J.", "" ], [ "Stevenson", "Thomas R.", "" ] ]
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1401.1861
Peter Breuer
Peter T. Breuer and Jonathan P. Bowen
Empirical Patterns in Google Scholar Citation Counts
6 pages, 8 figures, submitted to Cyberpatterns 2014
Proc. CyberPatterns 2014, co-located with SOSE 2014, pp. 398-403, Apr. 2014, IEEE Comp. Soc
10.1109/SOSE.2014.55
null
cs.DL
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Scholarly impact may be metricized using an author's total number of citations as a stand-in for real worth, but this measure varies in applicability between disciplines. The detail of the number of citations per publication is nowadays mapped in much more detail on the Web, exposing certain empirical patterns. This paper explores those patterns, using the citation data from Google Scholar for a number of authors.
[ { "created": "Wed, 8 Jan 2014 23:49:44 GMT", "version": "v1" } ]
2018-09-06
[ [ "Breuer", "Peter T.", "" ], [ "Bowen", "Jonathan P.", "" ] ]
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1401.1872
Paraschos Koutris
Paul Beame, Paraschos Koutris and Dan Suciu
Skew in Parallel Query Processing
null
null
null
null
cs.DB cs.DS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study the problem of computing a conjunctive query q in parallel, using p of servers, on a large database. We consider algorithms with one round of communication, and study the complexity of the communication. We are especially interested in the case where the data is skewed, which is a major challenge for scalable parallel query processing. We establish a tight connection between the fractional edge packings of the query and the amount of communication, in two cases. First, in the case when the only statistics on the database are the cardinalities of the input relations, and the data is skew-free, we provide matching upper and lower bounds (up to a poly log p factor) expressed in terms of fractional edge packings of the query q. Second, in the case when the relations are skewed and the heavy hitters and their frequencies are known, we provide upper and lower bounds (up to a poly log p factor) expressed in terms of packings of residual queries obtained by specializing the query to a heavy hitter. All our lower bounds are expressed in the strongest form, as number of bits needed to be communicated between processors with unlimited computational power. Our results generalizes some prior results on uniform databases (where each relation is a matching) [4], and other lower bounds for the MapReduce model [1].
[ { "created": "Thu, 9 Jan 2014 01:07:06 GMT", "version": "v1" } ]
2014-01-10
[ [ "Beame", "Paul", "" ], [ "Koutris", "Paraschos", "" ], [ "Suciu", "Dan", "" ] ]
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1401.1874
Sirani Mututhanthrige Perera
Sirani M. Perera, Grigory Bonik and Vadim Olshevsky
A Fast Algorithm for the Inversion of Quasiseparable Vandermonde-like Matrices
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null
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math.NA cs.SC
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The results on Vandermonde-like matrices were introduced as a generalization of polynomial Vandermonde matrices, and the displacement structure of these matrices was used to derive an inversion formula. In this paper we first present a fast Gaussian elimination algorithm for the polynomial Vandermonde-like matrices. Later we use the said algorithm to derive fast inversion algorithms for quasiseparable, semiseparable and well-free Vandermonde-like matrices having $\mathcal{O}(n^2)$ complexity. To do so we identify structures of displacement operators in terms of generators and the recurrence relations(2-term and 3-term) between the columns of the basis transformation matrices for quasiseparable, semiseparable and well-free polynomials. Finally we present an $\mathcal{O}(n^2)$ algorithm to compute the inversion of quasiseparable Vandermonde-like matrices.
[ { "created": "Thu, 9 Jan 2014 01:17:17 GMT", "version": "v1" } ]
2014-01-10
[ [ "Perera", "Sirani M.", "" ], [ "Bonik", "Grigory", "" ], [ "Olshevsky", "Vadim", "" ] ]
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1401.1876
Subhonmesh Bose
Subhonmesh Bose, Steven H. Low, Thanchanok Teeraratkul, Babak Hassibi
Equivalent relaxations of optimal power flow
12 pages, 7 figures
null
null
null
cs.SY
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Several convex relaxations of the optimal power flow (OPF) problem have recently been developed using both bus injection models and branch flow models. In this paper, we prove relations among three convex relaxations: a semidefinite relaxation that computes a full matrix, a chordal relaxation based on a chordal extension of the network graph, and a second-order cone relaxation that computes the smallest partial matrix. We prove a bijection between the feasible sets of the OPF in the bus injection model and the branch flow model, establishing the equivalence of these two models and their second-order cone relaxations. Our results imply that, for radial networks, all these relaxations are equivalent and one should always solve the second-order cone relaxation. For mesh networks, the semidefinite relaxation is tighter than the second-order cone relaxation but requires a heavier computational effort, and the chordal relaxation strikes a good balance. Simulations are used to illustrate these results.
[ { "created": "Thu, 9 Jan 2014 01:29:32 GMT", "version": "v1" } ]
2014-01-10
[ [ "Bose", "Subhonmesh", "" ], [ "Low", "Steven H.", "" ], [ "Teeraratkul", "Thanchanok", "" ], [ "Hassibi", "Babak", "" ] ]
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1401.1880
Elad Liebman
Elad Liebman, Maytal Saar-Tsechansky and Peter Stone
DJ-MC: A Reinforcement-Learning Agent for Music Playlist Recommendation
-Updated to the most recent and completed version (to be presented at AAMAS 2015) -Updated author list. in Autonomous Agents and Multiagent Systems (AAMAS) 2015, Istanbul, Turkey, May 2015
null
null
null
cs.LG
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In recent years, there has been growing focus on the study of automated recommender systems. Music recommendation systems serve as a prominent domain for such works, both from an academic and a commercial perspective. A fundamental aspect of music perception is that music is experienced in temporal context and in sequence. In this work we present DJ-MC, a novel reinforcement-learning framework for music recommendation that does not recommend songs individually but rather song sequences, or playlists, based on a model of preferences for both songs and song transitions. The model is learned online and is uniquely adapted for each listener. To reduce exploration time, DJ-MC exploits user feedback to initialize a model, which it subsequently updates by reinforcement. We evaluate our framework with human participants using both real song and playlist data. Our results indicate that DJ-MC's ability to recommend sequences of songs provides a significant improvement over more straightforward approaches, which do not take transitions into account.
[ { "created": "Thu, 9 Jan 2014 01:50:09 GMT", "version": "v1" }, { "created": "Wed, 25 Mar 2015 18:40:46 GMT", "version": "v2" } ]
2015-03-26
[ [ "Liebman", "Elad", "" ], [ "Saar-Tsechansky", "Maytal", "" ], [ "Stone", "Peter", "" ] ]
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1401.1882
YuLi Sun
Yuli Sun and Jinxu Tao
Image reconstruction from few views by L0-norm optimization
11 pages,5 figures, 1 table
null
10.1088/1674-1056/23/7/078703
null
cs.IT cs.CV math.IT
http://creativecommons.org/licenses/by-nc-sa/3.0/
The L1-norm of the gradient-magnitude images (GMI), which is the well-known total variation (TV) model, is widely used as regularization in the few views CT reconstruction. As the L1-norm TV regularization is tending to uniformly penalize the image gradient and the low-contrast structures are sometimes over smoothed, we proposed a new algorithm based on the L0-norm of the GMI to deal with the few views problem. To rise to the challenges introduced by the L0-norm DGT, the algorithm uses a pseudo-inverse transform of DGT and adapts an iterative hard thresholding (IHT) algorithm, whose convergence and effective efficiency have been theoretically proven. The simulation indicates that the algorithm proposed in this paper can obviously improve the reconstruction quality.
[ { "created": "Thu, 9 Jan 2014 02:08:06 GMT", "version": "v1" } ]
2019-05-01
[ [ "Sun", "Yuli", "" ], [ "Tao", "Jinxu", "" ] ]
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1401.1887
Li Shuxing
Shuxing Li, Tao Feng, Gennian Ge
On the Weight Distribution of Cyclic Codes with Niho Exponents
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null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Recently, there has been intensive research on the weight distributions of cyclic codes. In this paper, we compute the weight distributions of three classes of cyclic codes with Niho exponents. More specifically, we obtain two classes of binary three-weight and four-weight cyclic codes and a class of nonbinary four-weight cyclic codes. The weight distributions follow from the determination of value distributions of certain exponential sums. Several examples are presented to show that some of our codes are optimal and some have the best known parameters.
[ { "created": "Thu, 9 Jan 2014 04:38:18 GMT", "version": "v1" } ]
2014-01-10
[ [ "Li", "Shuxing", "" ], [ "Feng", "Tao", "" ], [ "Ge", "Gennian", "" ] ]
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1401.1888
Li-Xin Wang
Li-Xin Wang
Dynamical Models of Stock Prices Based on Technical Trading Rules Part I: The Models
null
IEEE Trans. on Fuzzy Systems, Vol. 23, No. 4, pp. 787-801, 2015
10.1109/TFUZZ.2014.2327994
null
q-fin.TR cs.CE q-fin.ST
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper we use fuzzy systems theory to convert the technical trading rules commonly used by stock practitioners into excess demand functions which are then used to drive the price dynamics. The technical trading rules are recorded in natural languages where fuzzy words and vague expressions abound. In Part I of this paper, we will show the details of how to transform the technical trading heuristics into nonlinear dynamic equations. First, we define fuzzy sets to represent the fuzzy terms in the technical trading rules; second, we translate each technical trading heuristic into a group of fuzzy IF-THEN rules; third, we combine the fuzzy IF-THEN rules in a group into a fuzzy system; and finally, the linear combination of these fuzzy systems is used as the excess demand function in the price dynamic equation. We transform a wide variety of technical trading rules into fuzzy systems, including moving average rules, support and resistance rules, trend line rules, big buyer, big seller and manipulator rules, band and stop rules, and volume and relative strength rules. Simulation results show that the price dynamics driven by these technical trading rules are complex and chaotic, and some common phenomena in real stock prices such as jumps, trending and self-fulfilling appear naturally.
[ { "created": "Thu, 9 Jan 2014 04:41:39 GMT", "version": "v1" }, { "created": "Sun, 21 Feb 2016 07:40:30 GMT", "version": "v2" } ]
2016-11-18
[ [ "Wang", "Li-Xin", "" ] ]
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Dynamical Models of Stock Prices Based on Technical Trading Rules Part I: The Models
https://arxiv.org/abs/1401.1888v2
https://arxiv.org/pdf/1401.1888v2.pdf
https://github.com/Wentworth1996/Summer_Intern_Progress
false
false
https://paperswithcode.com/paper/dynamical-models-of-stock-prices-based-on
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1401.1889
Duan Gu
Duan Gu, Meng Zhang, Qiang Gu, Dazhang Huang, Minghua Zhao
Development of Virtual Accelerator Environment for Beam Diagnostics
7 pages, 7 figures
null
null
null
physics.acc-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
For the proper operation of Dalian Compact Light Source (DCLS) linac, measurement and control of the electron bunch is critical. In order to test control algorithms and high level physical applications, a virtual accelerator environment is constructed based on ELEGANT and SDDS toolkit. The required beam parameter measurement and orbit control tools are verified under this virtual environment. The design concept and current development status are presented.
[ { "created": "Thu, 9 Jan 2014 04:42:58 GMT", "version": "v1" }, { "created": "Wed, 26 Feb 2014 06:27:52 GMT", "version": "v2" } ]
2014-02-27
[ [ "Gu", "Duan", "" ], [ "Zhang", "Meng", "" ], [ "Gu", "Qiang", "" ], [ "Huang", "Dazhang", "" ], [ "Zhao", "Minghua", "" ] ]
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1401.1891
Li-Xin Wang
Li-Xin Wang
Dynamical Models of Stock Prices Based on Technical Trading Rules Part II: Analysis of the Models
null
IEEE Trans. on Fuzzy Systems, Vol. 23, No. 4, pp. 1127-1141, 2015
10.1109/TFUZZ.2014.2346244
null
q-fin.TR cs.CE q-fin.ST
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In Part II of this paper, we concentrate our analysis on the price dynamical model with the moving average rules developed in Part I of this paper. By decomposing the excessive demand function, we reveal that it is the interplay between trend-following and contrarian actions that generates the price chaos, and give parameter ranges for the price series to change from divergence to chaos and to oscillation. We prove that the price dynamical model has an infinite number of equilibrium points but all these equilibrium points are unstable. We demonstrate the short-term predictability of the return volatility and derive the detailed formula of the Lyapunov exponent as function of the model parameters. We show that although the price is chaotic, the volatility converges to some constant very quickly at the rate of the Lyapunov exponent. We extract the formula relating the converged volatility to the model parameters based on Monte-Carlo simulations. We explore the circumstances under which the returns show independency and illustrate in details how the independency index changes with the model parameters. Finally, we plot the strange attractor and return distribution of the chaotic price model to illustrate the complex structure and fat-tailed distribution of the returns.
[ { "created": "Thu, 9 Jan 2014 04:49:30 GMT", "version": "v1" }, { "created": "Sun, 21 Feb 2016 07:43:06 GMT", "version": "v2" } ]
2016-11-18
[ [ "Wang", "Li-Xin", "" ] ]
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1401.1892
Li-Xin Wang
Li-Xin Wang
Dynamical Models of Stock Prices Based on Technical Trading Rules Part III: Application to Hong Kong Stocks
null
IEEE Trans. on Fuzzy Systems, Vol. 23, No. 5, pp. 1680-1697, 2015
10.1109/TFUZZ.2014.2374193
null
q-fin.TR cs.CE q-fin.ST
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In Part III of this study, we apply the price dynamical model with big buyers and big sellers developed in Part I of this paper to the daily closing prices of the top 20 banking and real estate stocks listed in the Hong Kong Stock Exchange. The basic idea is to estimate the strength parameters of the big buyers and the big sellers in the model and make buy/sell decisions based on these parameter estimates. We propose two trading strategies: (i) Follow-the-Big-Buyer which buys when big buyer begins to appear and there is no sign of big sellers, holds the stock as long as the big buyer is still there, and sells the stock once the big buyer disappears; and (ii) Ride-the-Mood which buys as soon as the big buyer strength begins to surpass the big seller strength, and sells the stock once the opposite happens. Based on the testing over 245 two-year intervals uniformly distributed across the seven years from 03-July-2007 to 02-July-2014 which includes a variety of scenarios, the net profits would increase 67% or 120% on average if an investor switched from the benchmark Buy-and-Hold strategy to the Follow-the-Big-Buyer or Ride-the-Mood strategies during this period, respectively.
[ { "created": "Thu, 9 Jan 2014 04:57:06 GMT", "version": "v1" }, { "created": "Sun, 21 Feb 2016 07:46:41 GMT", "version": "v2" } ]
2016-11-18
[ [ "Wang", "Li-Xin", "" ] ]
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1401.1895
Mahdi Shahbaba PhD
Mahdi Shahbaba and Soosan Beheshti
Efficient unimodality test in clustering by signature testing
null
null
null
null
cs.LG stat.ML
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This paper provides a new unimodality test with application in hierarchical clustering methods. The proposed method denoted by signature test (Sigtest), transforms the data based on its statistics. The transformed data has much smaller variation compared to the original data and can be evaluated in a simple proposed unimodality test. Compared with the existing unimodality tests, Sigtest is more accurate in detecting the overlapped clusters and has a much less computational complexity. Simulation results demonstrate the efficiency of this statistic test for both real and synthetic data sets.
[ { "created": "Thu, 9 Jan 2014 05:16:35 GMT", "version": "v1" } ]
2014-01-10
[ [ "Shahbaba", "Mahdi", "" ], [ "Beheshti", "Soosan", "" ] ]
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1401.1899
Kyoko K. Tanaka Dr.
Kyoko K. Tanaka, Akio Kawano, and Hidekazu Tanaka
Molecular Dynamics Simulations of the Nucleation of Water: Determining the Sticking Probability and Formation Energy of a Cluster
11 pages, 11 figures, 2 tables
null
10.1063/1.4867909
null
physics.chem-ph cond-mat.soft
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We performed molecular dynamics (MD) simulations of the nucleation of water vapor in order to test nucleation theories. Simulations were performed for a wide range of supersaturation ratios (S = 3-25) and water temperatures (Tw=300-390K). We obtained the nucleation rates and the formation free energies of a subcritical cluster from the cluster size distribution. The classical nucleation theory (CNT) and the modified classical nucleation theory (MCNT) overestimate the nucleation rates in all cases. The semi-phenomenological (SP) model, which corrects the MCNT prediction using the second virial coefficient of a vapor, reproduces the formation free energy of a cluster with the size < 20 to within 10 % and the nucleation rate and cluster size distributions to within one order of magnitude. The sticking probability of the vapor molecules to the clusters was also determined from the growth rates of the clusters. The sticking probability rapidly increases with the supersaturation ratio S, which is similar to the Lennard-Jones system.
[ { "created": "Thu, 9 Jan 2014 05:53:42 GMT", "version": "v1" }, { "created": "Wed, 26 Feb 2014 01:40:18 GMT", "version": "v2" } ]
2015-06-18
[ [ "Tanaka", "Kyoko K.", "" ], [ "Kawano", "Akio", "" ], [ "Tanaka", "Hidekazu", "" ] ]
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1401.1900
Pratim Kumar Chattaraj
Munmun Khatua, Sudip Pan and Pratim K. Chattaraj
Does Confinement Force Marriage between Two Unwilling Partners?: A Case Study of He2@BmNm (m=12, 16)
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null
null
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physics.atm-clus
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
TThe stability of Ngn@B12N12 and Ngn@B16N16 systems is assessed through a density functional study and ab initio simulation. Although they are found to be thermodynamically unstable with respect to the dissociation of individual Ng atoms and parent cage, ab initio simulation reveals that except Ne2@B12N12 they are kinetically stable to retain their structures intact throughout the simulation time (500 fs). The Ne2@B12N12 cage dissociates and the Ne atoms get separated as the simulation proceeds. The He-He unit undergoes translation, rotation and vibration inside the cavity of B12N12 and B16N16 cages. Electron density analysis (Atoms-in-Molecule (AIM)) shows that there is some degree of covalent character in He-He bond (Wc type) of He2@B12N12. In case of He2@B16N16, the He-He interaction is mostly of noncovalent type (Wn). In many cases, especially for the heavier Ng atoms the Ng-N/B bonds are found to be of covalent type or at least having some degree of covalent character. But Wiberg bond indices show zero bond order in He-He bond and very low bond order in cases of Ng-N/B bonds. Energy decomposition analysis (EDA) provides further insights into the bonding among the Ng atoms and the cage. The change in charge distribution, radius, hardness, electrophilicity and polarizability implies that they possess different properties and reactivity from their parent moieties. The HOMO energies of He2 units in He2@B12N12 and He2@B16N16 are significantly higher than that in free He atoms. Their kinetic stability and different calculated properties imply that the He-He interaction and Ng-N/B interaction may be considered as chemical bonds according to the IUPAC definition.
[ { "created": "Thu, 9 Jan 2014 06:10:38 GMT", "version": "v1" } ]
2014-01-10
[ [ "Khatua", "Munmun", "" ], [ "Pan", "Sudip", "" ], [ "Chattaraj", "Pratim K.", "" ] ]
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1401.1903
Young-Chul Shim
Young-Chul Shim
Distributed Cloud Computing Environment Enhanced with Capabilities for Wide-Area Migration and Replication of Virtual Machines
13 pages
International Journal of Computer Science & Information Technology, Vol. 5, No. 6, December 2013
null
null
cs.DC
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
When a network application is implmented as a virtual machine on a cloud and is used by a large number of users, the location of the virtual machine should be selected carefully so that the response time experienced by users is minimized. As the user population moves and/or increases, the virtual machine may need to be migrated to a new location or replicated on many locations over a wide-area network. Virtual machine migration and replication have been studied extensively but in most cases are limited within a subnetwork to be able to maintain service continuity. In this paper we introduce a distributed cloud computing environment which facilitates the migration and replication of a virtual machine over a wide area network. The mechanism is provided by an overlay network of smart routers, each of which connects a cooperating data center to the Internet. The proposed approach is analyzed and compared with related works
[ { "created": "Thu, 9 Jan 2014 06:39:15 GMT", "version": "v1" } ]
2014-01-10
[ [ "Shim", "Young-Chul", "" ] ]
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1401.1905
Mojgan Pourhassan
Dogan Corus and Per Kristian Lehre and Frank Neumann and Mojgan Pourhassan
A Parameterized Complexity Analysis of Bi-level Optimisation with Evolutionary Algorithms
null
null
null
null
cs.NE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Bi-level optimisation problems have gained increasing interest in the field of combinatorial optimisation in recent years. With this paper, we start the runtime analysis of evolutionary algorithms for bi-level optimisation problems. We examine two NP-hard problems, the generalised minimum spanning tree problem (GMST), and the generalised travelling salesman problem (GTSP) in the context of parameterised complexity. For the generalised minimum spanning tree problem, we analyse the two approaches presented by Hu and Raidl (2012) with respect to the number of clusters that distinguish each other by the chosen representation of possible solutions. Our results show that a (1+1) EA working with the spanning nodes representation is not a fixed-parameter evolutionary algorithm for the problem, whereas the global structure representation enables to solve the problem in fixed-parameter time. We present hard instances for each approach and show that the two approaches are highly complementary by proving that they solve each other's hard instances very efficiently. For the generalised travelling salesman problem, we analyse the problem with respect to the number of clusters in the problem instance. Our results show that a (1+1) EA working with the global structure representation is a fixed-parameter evolutionary algorithm for the problem.
[ { "created": "Thu, 9 Jan 2014 07:00:20 GMT", "version": "v1" } ]
2014-01-10
[ [ "Corus", "Dogan", "" ], [ "Lehre", "Per Kristian", "" ], [ "Neumann", "Frank", "" ], [ "Pourhassan", "Mojgan", "" ] ]
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1401.1906
J\"urgen M\"unch
Peter Liggesmeyer, Jens Heidrich, J\"urgen M\"unch, Robert Kalckl\"osch, Henning Barthel, Dirk Zeckzer
Visualization of Software and Systems as Support Mechanism for Integrated Software Project Control
10 pages. The final publication is available at http://link.springer.com/chapter/10.1007%2F978-3-642-02574-7_94
null
10.1007/978-3-642-02574-7_94
Human-Computer Interaction: New Trends, volume 5610 of Lecture Notes in Computer Science, pages 846-855. Springer Berlin Heidelberg, 2009
cs.SE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Many software development organizations still lack support for obtaining intellectual control over their software development processes and for determining the performance of their processes and the quality of the produced products. Systematic support for detecting and reacting to critical process and product states in order to achieve planned goals is usually missing. One means to institutionalize measurement on the basis of explicit models is the development and establishment of a so-called Software Project Control Center (SPCC) for systematic quality assurance and management support. An SPCC is comparable to a control room, which is a well known term in the mechanical production domain. One crucial task of an SPCC is the systematic visualization of measurement data in order to provide context-, purpose-, and role-oriented information for all stakeholders (e.g., project managers, quality assurance managers, developers) during the execution of a software development project. The article will present an overview of SPCC concepts, a concrete instantiation that supports goal-oriented data visualization, as well as examples and experiences from practical applications.
[ { "created": "Thu, 9 Jan 2014 07:02:06 GMT", "version": "v1" } ]
2014-01-10
[ [ "Liggesmeyer", "Peter", "" ], [ "Heidrich", "Jens", "" ], [ "Münch", "Jürgen", "" ], [ "Kalcklösch", "Robert", "" ], [ "Barthel", "Henning", "" ], [ "Zeckzer", "Dirk", "" ] ]
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1401.1907
Md. Ibrahim Chowdhury
Md. Ibrahim Chowdhury, Mohammad Iqbal, Naznin Sultana and Faisal Rahman
Analyzing an Analytical Solution Model for Simultaneous Mobility
null
International Journal of Wireless & Mobile Networks (IJWMN) Vol. 5, December 2013, pp 111-124
10.5121/ijwmn.2013.5609
null
cs.NI
http://creativecommons.org/licenses/by/3.0/
Current mobility models for simultaneous mobility have their convolution in designing simultaneous movement where mobile nodes (MNs) travel randomly from the two adjacent cells at the same time and also have their complexity in the measurement of the occurrences of simultaneous handover. Simultaneous mobility problem incurs when two of the MNs start handover approximately at the same time. As Simultaneous mobility is different for the other mobility pattern, generally occurs less number of times in real time; we analyze that a simplified simultaneous mobility model can be considered by taking only symmetric positions of MNs with random steps. In addition to that, we simulated the model using mSCTP and compare the simulation results in different scenarios with customized cell ranges. The analytical results shows that with the bigger the cell sizes, simultaneous handover with random steps occurrences become lees and for the sequential mobility (where initial positions of MNs is predetermined) with random steps, simultaneous handover is more frequent.
[ { "created": "Thu, 9 Jan 2014 07:06:24 GMT", "version": "v1" } ]
2014-01-10
[ [ "Chowdhury", "Md. Ibrahim", "" ], [ "Iqbal", "Mohammad", "" ], [ "Sultana", "Naznin", "" ], [ "Rahman", "Faisal", "" ] ]
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1401.1910
J\"urgen M\"unch
Martin Kowalczyk, J\"urgen M\"unch, Masafumi Katahira, Tatsuya Kaneko, Yuko Miyamoto, Yumi Koishi
Aligning Software-related Strategies in Multi-Organizational Settings
14 pages. The final publication is available at http://www.shaker.de/de/content/catalogue/index.asp? lang=de&ID=8&ISBN=978-3-8322-9618-6
Proceedings of the International Conference on Software Process and Product Measurement (IWSM/MetriKon/ Mensura 2010), pages 261-274, Stuttgart, Germany, November 10-12 2010
null
null
cs.SE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Aligning the activities of an organization with its business goals is a challenging task that is critical for success. Alignment in a multi-organizational setting requires the integration of different internal or external organizational units. The anticipated benefits of multi-organizational alignment consist of clarified contributions and increased transparency of the involved organizational units. The GQM+Strategies approach provides mechanisms for explicitly linking goals and strategies within an organization and is based on goal-oriented measurement. This paper presents the process and first-hand experience of applying GQM+Strategies in a multi-organizational setting from the aerospace industry. Additionally, the resulting GQM+Strategies grid is sketched and selected parts are discussed. Finally, the results are reflected on and an overview of future work is given.
[ { "created": "Thu, 9 Jan 2014 07:38:07 GMT", "version": "v1" } ]
2014-01-10
[ [ "Kowalczyk", "Martin", "" ], [ "Münch", "Jürgen", "" ], [ "Katahira", "Masafumi", "" ], [ "Kaneko", "Tatsuya", "" ], [ "Miyamoto", "Yuko", "" ], [ "Koishi", "Yumi", "" ] ]
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1401.1913
J\"urgen M\"unch
Adam Trendowicz, Michael Kl\"as, Constanza Lampasona, J\"urgen M\"unch, Christian K\"orner, Matthias Saft
Model-based Product Quality Evaluation with Multi-Criteria Decision Analysis
18 pages. The final publication is available at http://www.shaker.de/de/content/catalogue/index.asp? lang=de&ID=8&ISBN=978-3-8322-9618-6
Proceedings of the International Conference on Software Process and Product Measurement (IWSM/MetriKon/Mensura 2010), pages 3-20, Stuttgart, Germany, November 10-12 2010
null
null
cs.SE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The ability to develop or evolve software or software-based systems/services with defined and guaranteed quality in a predictable way is becoming increasingly important. Essential - though not exclusive - prerequisites for this are the ability to model the relevant quality properties appropriately and the capability to perform reliable quality evaluations. Existing approaches for integrated quality modeling and evaluation are typically either narrowly focused or too generic and have proprietary ways for modeling and evaluating quality. This article sketches an ap- proach for modeling and evaluating quality properties in a uniform way, without losing the ability to build sufficiently detailed customized models for specific quality properties. The focus of this article is on the description of a multi-criteria aggregation mechanism that can be used for the evaluation. In addition, the underlying quality meta-model, an example application scenario, related work, initial application results, and an outlook on future research are presented.
[ { "created": "Thu, 9 Jan 2014 07:47:58 GMT", "version": "v1" } ]
2014-01-10
[ [ "Trendowicz", "Adam", "" ], [ "Kläs", "Michael", "" ], [ "Lampasona", "Constanza", "" ], [ "Münch", "Jürgen", "" ], [ "Körner", "Christian", "" ], [ "Saft", "Matthias", "" ] ]
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1401.1916
Tao Xiong
Tao Xiong, Yukun Bao, Zhongyi Hu
Multiple-output support vector regression with a firefly algorithm for interval-valued stock price index forecasting
33 pages
Knowledge-based Systems. 55, 2013:87-100
10.1016/j.knosys.2013.10.012
null
cs.CE cs.LG q-fin.ST
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Highly accurate interval forecasting of a stock price index is fundamental to successfully making a profit when making investment decisions, by providing a range of values rather than a point estimate. In this study, we investigate the possibility of forecasting an interval-valued stock price index series over short and long horizons using multi-output support vector regression (MSVR). Furthermore, this study proposes a firefly algorithm (FA)-based approach, built on the established MSVR, for determining the parameters of MSVR (abbreviated as FA-MSVR). Three globally traded broad market indices are used to compare the performance of the proposed FA-MSVR method with selected counterparts. The quantitative and comprehensive assessments are performed on the basis of statistical criteria, economic criteria, and computational cost. In terms of statistical criteria, we compare the out-of-sample forecasting using goodness-of-forecast measures and testing approaches. In terms of economic criteria, we assess the relative forecast performance with a simple trading strategy. The results obtained in this study indicate that the proposed FA-MSVR method is a promising alternative for forecasting interval-valued financial time series.
[ { "created": "Thu, 9 Jan 2014 07:58:06 GMT", "version": "v1" } ]
2014-01-13
[ [ "Xiong", "Tao", "" ], [ "Bao", "Yukun", "" ], [ "Hu", "Zhongyi", "" ] ]
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1401.1918
Jes\'us M\'aximo Ram\'irez Santiago
Jose Dario Luis Delgado and Jesus Maximo Ramirez Santiago
Key Performance Indicators for QOS Assessment in TETRA Networks
18 pages, International Journal of Mobile Network Communications & Telematics (IJMNCT) Vol.3, No.6, December 2013
null
10.5121/ijmnct.2013.3601
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Key Performance Indicators (KPIs) are widely used by GSM and UMTS carriers with the aim of evaluating the network performance and the Quality of Service (QoS) delivered to users. TETRA networks are basically designed to provide telecommunication services to Public Safety & Security (PSS) organizations, thus the compliance of the QoS levels required by these clients is usually critical. Despite that, the use of KPIs to assess the network performance and the QoS achieved in TETRA systems is not very common. This paper not only states the need of monitoring and evaluating these parameters, but also introduces a set of KPIs which is considered necessary and sufficient in order to allow TETRA operators to be aware of whether provided services meet the QoS requirements established by end users.
[ { "created": "Thu, 9 Jan 2014 08:02:55 GMT", "version": "v1" } ]
2014-01-10
[ [ "Delgado", "Jose Dario Luis", "" ], [ "Santiago", "Jesus Maximo Ramirez", "" ] ]
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1401.1919
Silu Huang
Silu Huang, James Cheng, Huanhuan Wu
Temporal Graph Traversals: Definitions, Algorithms, and Applications
null
null
null
null
cs.DS cs.DB
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A temporal graph is a graph in which connections between vertices are active at specific times, and such temporal information leads to completely new patterns and knowledge that are not present in a non-temporal graph. In this paper, we study traversal problems in a temporal graph. Graph traversals, such as DFS and BFS, are basic operations for processing and studying a graph. While both DFS and BFS are well-known simple concepts, it is non-trivial to adopt the same notions from a non-temporal graph to a temporal graph. We analyze the difficulties of defining temporal graph traversals and propose new definitions of DFS and BFS for a temporal graph. We investigate the properties of temporal DFS and BFS, and propose efficient algorithms with optimal complexity. In particular, we also study important applications of temporal DFS and BFS. We verify the efficiency and importance of our graph traversal algorithms in real world temporal graphs.
[ { "created": "Thu, 9 Jan 2014 08:04:53 GMT", "version": "v1" } ]
2014-01-10
[ [ "Huang", "Silu", "" ], [ "Cheng", "James", "" ], [ "Wu", "Huanhuan", "" ] ]
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1401.1926
Zhongyi Hu
Yukun Bao, Zhongyi Hu, Tao Xiong
A PSO and Pattern Search based Memetic Algorithm for SVMs Parameters Optimization
27 pages. Neurocomputing, 2013
null
10.1016/j.neucom.2013.01.027
null
cs.LG cs.AI cs.NE stat.ML
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Addressing the issue of SVMs parameters optimization, this study proposes an efficient memetic algorithm based on Particle Swarm Optimization algorithm (PSO) and Pattern Search (PS). In the proposed memetic algorithm, PSO is responsible for exploration of the search space and the detection of the potential regions with optimum solutions, while pattern search (PS) is used to produce an effective exploitation on the potential regions obtained by PSO. Moreover, a novel probabilistic selection strategy is proposed to select the appropriate individuals among the current population to undergo local refinement, keeping a well balance between exploration and exploitation. Experimental results confirm that the local refinement with PS and our proposed selection strategy are effective, and finally demonstrate effectiveness and robustness of the proposed PSO-PS based MA for SVMs parameters optimization.
[ { "created": "Thu, 9 Jan 2014 08:41:55 GMT", "version": "v1" } ]
2014-01-10
[ [ "Bao", "Yukun", "" ], [ "Hu", "Zhongyi", "" ], [ "Xiong", "Tao", "" ] ]
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1401.1929
Vera Montalbano
Vera Montalbano and Emilio Mariotti
A multipurpose action for learning-teaching process: The Pigelleto's Summer School of Physics
10 pages, 5 figures, presented at the 10th Conference of the European Science Education Research Association (ESERA), 2-7 September 2013, Nicosia, Cyprus
Science Education Research For Evidence-based Teaching and Coherence in Learning, pp. 1-12 (2014), Nicosia, ISBN: 978-9963-700-77-6
null
null
physics.ed-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Since 2006, forty students from high school are selected to attend a full immersion summer school of physics in the Pigelleto Natural Reserve, on the south east side of Mount Amiata in the province of Siena. Topics are chosen so that students are involved in activities rarely pursued in high school, aspects and relationship with society are underlined and discussed. Our purpose is offering to really motivated students an opportunity of testing the scientific method, the laboratory experience in a stimulating context, by deepening an interesting and relevant topic in order to orienting them towards physics. Students are encouraged in cooperating in small groups in order to present and share the achieved results. Starting from the third edition of the school, the school became a training opportunity for younger teachers which are involved in programming and realization of selected activities. The laboratory activities with students are usually supervised by a young and an expert teacher in order to fix the correct methodology. Recently, young teachers enrolled in a master in Physics Education tested in the summer school some activity designed in their courses.
[ { "created": "Thu, 9 Jan 2014 08:52:07 GMT", "version": "v1" } ]
2016-01-08
[ [ "Montalbano", "Vera", "" ], [ "Mariotti", "Emilio", "" ] ]
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1401.1933
Xavier Orlik
Debajyoti Upadhyay (DOTA), Michael Richert (DOTA), Eric Lacot (LSP), Antonello De Martino (LPICM), Xavier Orlik (DOTA)
Effect of speckle on APSCI method and Mueller Imaging
7 pages
Optics Express 19, 5 (2012) 4553-4559
10.1364/OE.19.004553
null
physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The principle of the polarimetric imaging method called APSCI (Adapted Polarization State Contrast Imaging) is to maximize the polarimetric contrast between an object and its background using specific polarization states of illumination and detection. We perform here a comparative study of the APSCI method with existing Classical Mueller Imaging(CMI) associated with polar decomposition in the presence of fully and partially polarized circular Gaussian speckle. The results show a noticeable increase of the Bhattacharyya distance used as our contrast parameter for the APSCI method, especially when the object and background exhibit several polarimetric properties simultaneously.
[ { "created": "Thu, 9 Jan 2014 09:22:33 GMT", "version": "v1" } ]
2014-01-10
[ [ "Upadhyay", "Debajyoti", "", "DOTA" ], [ "Richert", "Michael", "", "DOTA" ], [ "Lacot", "Eric", "", "LSP" ], [ "De Martino", "Antonello", "", "LPICM" ], [ "Orlik", "Xavier", "", "DOTA" ] ]
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1401.1939
Christian Smorra
C. Smorra, K. Blaum, K. Franke, Y. Matsuda, A. Mooser, H. Nagahama, C. Ospelkaus, W. Quint, G. Schneider, S. Van Gorp, J. Walz, Y. Yamazaki, S. Ulmer
Towards a high-precision measurement of the antiproton magnetic moment
Submitted to LEAP 2013 conference proceedings
null
10.1007/s10751-014-1018-7
null
physics.atom-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The recent observation of single spins flips with a single proton in a Penning trap opens the way to measure the proton magnetic moment with high precision. Based on this success, which has been achieved with our apparatus at the University of Mainz, we demonstrated recently the first application of the so called double Penning-trap method with a single proton. This is a major step towards a measurement of the proton magnetic moment with ppb precision. To apply this method to a single trapped antiproton our collaboration is currently setting up a companion experiment at the antiproton decelerator of CERN. This effort is recognized as the Baryon Antibaryon Symmetry Experiment (BASE). A comparison of both magnetic moment values will provide a stringent test of CPT invariance with baryons.
[ { "created": "Thu, 9 Jan 2014 10:05:57 GMT", "version": "v1" } ]
2015-06-18
[ [ "Smorra", "C.", "" ], [ "Blaum", "K.", "" ], [ "Franke", "K.", "" ], [ "Matsuda", "Y.", "" ], [ "Mooser", "A.", "" ], [ "Nagahama", "H.", "" ], [ "Ospelkaus", "C.", "" ], [ "Quint", "W.", "" ], [ "Schneider", "G.", "" ], [ "Van Gorp", "S.", "" ], [ "Walz", "J.", "" ], [ "Yamazaki", "Y.", "" ], [ "Ulmer", "S.", "" ] ]
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1401.1942
Ankur Sinha PhD
Ankur Sinha and Pekka Malo and Kalyanmoy Deb
Test Problem Construction for Single-Objective Bilevel Optimization
arXiv admin note: text overlap with arXiv:1303.3901
null
null
null
cs.MS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, we propose a procedure for designing controlled test problems for single-objective bilevel optimization. The construction procedure is flexible and allows its user to control the different complexities that are to be included in the test problems independently of each other. In addition to properties that control the difficulty in convergence, the procedure also allows the user to introduce difficulties caused by interaction of the two levels. As a companion to the test problem construction framework, the paper presents a standard test suite of twelve problems, which includes eight unconstrained and four constrained problems. Most of the problems are scalable in terms of variables and constraints. To provide baseline results, we have solved the proposed test problems using a nested bilevel evolutionary algorithm. The results can be used for comparison, while evaluating the performance of any other bilevel optimization algorithm. The codes related to the paper may be accessed from the website \url{http://bilevel.org}.
[ { "created": "Thu, 9 Jan 2014 10:22:26 GMT", "version": "v1" }, { "created": "Wed, 18 Jun 2014 10:41:13 GMT", "version": "v2" }, { "created": "Tue, 16 Aug 2016 16:28:15 GMT", "version": "v3" } ]
2016-08-17
[ [ "Sinha", "Ankur", "" ], [ "Malo", "Pekka", "" ], [ "Deb", "Kalyanmoy", "" ] ]
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1401.1943
Rania Morsi
Rania Morsi, Diomidis S. Michalopoulos, Robert Schober
Multi-user Scheduling Schemes for Simultaneous Wireless Information and Power Transfer Over Fading Channels
30 pages, 5 figures, 6 tables, accepted for publication in IEEE Transactions on Wireless Communications
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, we study downlink multi-user scheduling for a time-slotted system with simultaneous wireless information and power transfer. In particular, in each time slot, a single user is scheduled to receive information, while the remaining users opportunistically harvest the ambient radio frequency energy. We devise novel online scheduling schemes in which the tradeoff between the users' ergodic rates and their average amount of harvested energy can be controlled. In particular, we modify the well-known maximum signal-to-noise ratio (SNR) and maximum normalized-SNR (N-SNR) schedulers by scheduling the user whose SNR/N-SNR has a certain ascending order (selection order) rather than the maximum one. We refer to these new schemes as order-based SNR/N-SNR scheduling and show that the lower the selection order, the higher the average amount of harvested energy in the system at the expense of a reduced ergodic sum rate. The order-based N-SNR scheduling scheme provides proportional fairness among the users in terms of both the ergodic achievable rate and the average harvested energy. Furthermore, we propose an order-based equal throughput (ET) fair scheduler, which schedules the user having the minimum moving average throughput out of the users whose N-SNR orders fall into a given set of allowed orders. We show that this scheme provides the users with proportionally fair average harvested energies. In this context, we also derive feasibility conditions for achieving ET with the order-based ET scheduler. Using the theory of order statistics, the average per-user harvested energy and ergodic achievable rate of all proposed scheduling schemes are analyzed and obtained in closed form for independent and non-identically distributed Rayleigh, Ricean, Nakagami-m, and Weibull fading channels. Our closed-form analytical results are corroborated by simulations.
[ { "created": "Thu, 9 Jan 2014 10:22:30 GMT", "version": "v1" }, { "created": "Wed, 3 Dec 2014 10:28:45 GMT", "version": "v2" } ]
2014-12-04
[ [ "Morsi", "Rania", "" ], [ "Michalopoulos", "Diomidis S.", "" ], [ "Schober", "Robert", "" ] ]
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1401.1944
Stelios Stefanatos
Stelios Stefanatos and Angeliki Alexiou
Exploiting Frequency and Spatial Dimensions in Small Cell Wireless Networks
IEEE WCNC '14
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This paper examines the efficiency of spatial and frequency dimensions in serving multiple users in the downlink of a small cell wireless network with randomly deployed access points. For this purpose, the stochastic geometry framework is incorporated, taking into account the user distribution within each cell and the effect of sharing the available system resources to multiple users. An analysis of performance in terms of signal-to-interference-ratio and achieved user rate is provided that holds under the class of non-cooperative multiple access schemes. In order to obtain concrete results, two simple instances of multiple access schemes are considered. It is shown that performance depends critically on both the availability of frequency and/or spatial dimensions as well as the way they are employed. In particular, increasing the number of available frequency dimensions alone is beneficial for users experiencing large interference, whereas increasing spatial dimensions without employing frequency dimensions degrades performance. However, best performance is achieved when both dimensions are combined in serving the users.
[ { "created": "Thu, 9 Jan 2014 10:28:28 GMT", "version": "v1" }, { "created": "Sun, 16 Feb 2014 15:58:52 GMT", "version": "v2" } ]
2014-02-18
[ [ "Stefanatos", "Stelios", "" ], [ "Alexiou", "Angeliki", "" ] ]
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1401.1946
Oliver Arold
Oliver Arold, Svenja Ettl, Florian Willomitzer, Gerd H\"ausler
Hand-guided 3D surface acquisition by combining simple light sectioning with real-time algorithms
19 pages, 22 figures
null
null
null
physics.optics cs.CV
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Precise 3D measurements of rigid surfaces are desired in many fields of application like quality control or surgery. Often, views from all around the object have to be acquired for a full 3D description of the object surface. We present a sensor principle called "Flying Triangulation" which avoids an elaborate "stop-and-go" procedure. It combines a low-cost classical light-section sensor with an algorithmic pipeline. A hand-guided sensor captures a continuous movie of 3D views while being moved around the object. The views are automatically aligned and the acquired 3D model is displayed in real time. In contrast to most existing sensors no bandwidth is wasted for spatial or temporal encoding of the projected lines. Nor is an expensive color camera necessary for 3D acquisition. The achievable measurement uncertainty and lateral resolution of the generated 3D data is merely limited by physics. An alternating projection of vertical and horizontal lines guarantees the existence of corresponding points in successive 3D views. This enables a precise registration without surface interpolation. For registration, a variant of the iterative closest point algorithm - adapted to the specific nature of our 3D views - is introduced. Furthermore, data reduction and smoothing without losing lateral resolution as well as the acquisition and mapping of a color texture is presented. The precision and applicability of the sensor is demonstrated by simulation and measurement results.
[ { "created": "Thu, 9 Jan 2014 10:36:49 GMT", "version": "v1" } ]
2014-01-10
[ [ "Arold", "Oliver", "" ], [ "Ettl", "Svenja", "" ], [ "Willomitzer", "Florian", "" ], [ "Häusler", "Gerd", "" ] ]
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1401.1974
Vu Nguyen
Vu Nguyen, Dinh Phung, XuanLong Nguyen, Svetha Venkatesh, Hung Hai Bui
Bayesian Nonparametric Multilevel Clustering with Group-Level Contexts
Full version of ICML 2014
null
null
null
cs.LG stat.ML
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a Bayesian nonparametric framework for multilevel clustering which utilizes group-level context information to simultaneously discover low-dimensional structures of the group contents and partitions groups into clusters. Using the Dirichlet process as the building block, our model constructs a product base-measure with a nested structure to accommodate content and context observations at multiple levels. The proposed model possesses properties that link the nested Dirichlet processes (nDP) and the Dirichlet process mixture models (DPM) in an interesting way: integrating out all contents results in the DPM over contexts, whereas integrating out group-specific contexts results in the nDP mixture over content variables. We provide a Polya-urn view of the model and an efficient collapsed Gibbs inference procedure. Extensive experiments on real-world datasets demonstrate the advantage of utilizing context information via our model in both text and image domains.
[ { "created": "Thu, 9 Jan 2014 12:08:07 GMT", "version": "v1" }, { "created": "Mon, 13 Jan 2014 06:28:03 GMT", "version": "v2" }, { "created": "Mon, 27 Jan 2014 08:13:58 GMT", "version": "v3" }, { "created": "Wed, 29 Jan 2014 01:54:57 GMT", "version": "v4" } ]
2014-01-30
[ [ "Nguyen", "Vu", "" ], [ "Phung", "Dinh", "" ], [ "Nguyen", "XuanLong", "" ], [ "Venkatesh", "Svetha", "" ], [ "Bui", "Hung Hai", "" ] ]
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1401.1977
Bernardetta Addis
Bernardetta Addis (INRIA Nancy - Grand Est / LORIA), Giuliana Carello (DEIB), Antonio Capone (DEIB), Luca G. Gianoli (DEIB), Brunilde Sans\`o
Robust Energy Management for Green and Survivable IP Networks
null
null
null
null
cs.NI cs.SY
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Despite the growing necessity to make Internet greener, it is worth pointing out that energy-aware strategies to minimize network energy consumption must not undermine the normal network operation. In particular, two very important issues that may limit the application of green networking techniques concern, respectively, network survivability, i.e. the network capability to react to device failures, and robustness to traffic variations. We propose novel modelling techniques to minimize the daily energy consumption of IP networks, while explicitly guaranteeing, in addition to typical QoS requirements, both network survivability and robustness to traffic variations. The impact of such limitations on final network consumption is exhaustively investigated. Daily traffic variations are modelled by dividing a single day into multiple time intervals (multi-period problem), and network consumption is reduced by putting to sleep idle line cards and chassis. To preserve network resiliency we consider two different protection schemes, i.e. dedicated and shared protection, according to which a backup path is assigned to each demand and a certain amount of spare capacity has to be available on each link. Robustness to traffic variations is provided by means of a specific modelling framework that allows to tune the conservatism degree of the solutions and to take into account load variations of different magnitude. Furthermore, we impose some inter-period constraints necessary to guarantee network stability and preserve the device lifetime. Both exact and heuristic methods are proposed. Experimentations carried out with realistic networks operated with flow-based routing protocols (i.e. MPLS) show that significant savings, up to 30%, can be achieved also when both survivability and robustness are fully guaranteed.
[ { "created": "Thu, 9 Jan 2014 12:20:27 GMT", "version": "v1" } ]
2014-01-10
[ [ "Addis", "Bernardetta", "", "INRIA Nancy - Grand Est / LORIA" ], [ "Carello", "Giuliana", "", "DEIB" ], [ "Capone", "Antonio", "", "DEIB" ], [ "Gianoli", "Luca G.", "", "DEIB" ], [ "Sansò", "Brunilde", "" ] ]
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1401.1982
Maleh Yassine
Y. Maleh, A. Ezzati
A review of security attacks and Intrusion Detection Schemes in Wireless Sensor Networks
12 pages with 9 figures
International Journal of Wireless & Mobile Networks (IJWMN) Vol. 5, No. 6, December 2013
null
null
cs.CR cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Wireless Sensor Networks (WSNs) are currently used in different industrial and consumer applications, such as earth monitoring, health related applications, natural disaster prevention, and many other areas. Security is one of the major aspects of Wireless sensor networks due to the resource limitations of sensor nodes. However, these networks are facing several threats that affect their functioning and their life. In this paper we present security attacks in wireless sensor networks, and we focus on a review and analysis of the recent Intrusion Detection schemes in WSNs.
[ { "created": "Thu, 9 Jan 2014 12:37:25 GMT", "version": "v1" } ]
2014-01-13
[ [ "Maleh", "Y.", "" ], [ "Ezzati", "A.", "" ] ]
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1401.1990
David Menotti
R. F. Prates, G. C\'amara-Ch\'avez, William R. Schwartz, and D. Menotti
Brazilian License Plate Detection Using Histogram of Oriented Gradients and Sliding Windows
null
International Journal of Computer Science & Information Technology (IJCSIT) Vol 5, No 6, pp. 39-52, December 2013
10.5121/ijcsit.2013.5603
null
cs.CV
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Due to the increasingly need for automatic traffic monitoring, vehicle license plate detection is of high interest to perform automatic toll collection, traffic law enforcement, parking lot access control, among others. In this paper, a sliding window approach based on Histogram of Oriented Gradients (HOG) features is used for Brazilian license plate detection. This approach consists in scanning the whole image in a multiscale fashion such that the license plate is located precisely. The main contribution of this work consists in a deep study of the best setup for HOG descriptors on the detection of Brazilian license plates, in which HOG have never been applied before. We also demonstrate the reliability of this method ensured by a recall higher than 98% (with a precision higher than 78%) in a publicly available data set.
[ { "created": "Thu, 9 Jan 2014 13:01:52 GMT", "version": "v1" } ]
2014-01-10
[ [ "Prates", "R. F.", "" ], [ "Cámara-Chávez", "G.", "" ], [ "Schwartz", "William R.", "" ], [ "Menotti", "D.", "" ] ]
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1401.1995
Jacopo Petitta MPhys
G. Montani and J. Petitta
Plasma Phenomenology in Astrophysical Systems: Radio-Sources and Jets
20 pages, 6 figures
null
10.1063/1.4884345
null
astro-ph.HE physics.plasm-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We review the plasma phenomenology in the astrophysical sources which show appreciable radio emissions, namely Radio-Jets from Pulsars, Microquasars, Quasars and Radio-Active Galaxies. A description of their basic features is presented, then we discuss in some details the links between their morphology and the mechanisms that lead to the different radio-emissions, investigating especially the role played by the plasma configurations surrounding compact objects (Neutron Stars, Black Holes). For the sake of completeness, we briefly mention observational techniques and detectors, whose structure set them apart from other astrophysical instruments. The fundamental ideas concerning Angular Momentum Transport across plasma accretion disks (together with the disk-source-jet coupling problem) are discussed, by stressing their successes and their shortcomings. An alternative scenario is then inferred, based on a parallelism between astrophysical and laboratory plasma configurations, where small-scale structures can be found. We will focus our attention on the morphology of the radio-jets, on their coupling with the accretion disks and on the possible triggering phenomena, viewed as profiles of plasma instabilities.
[ { "created": "Thu, 9 Jan 2014 13:24:47 GMT", "version": "v1" } ]
2015-06-18
[ [ "Montani", "G.", "" ], [ "Petitta", "J.", "" ] ]
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1401.1996
Simone Righi
Simone Righi and K\'aroly Tak\'acs
Emotional Strategies as Catalysts for Cooperation in Signed Networks
24 pages, Accepted for publication in Advances in Complex Systems
null
null
null
physics.soc-ph cs.SI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The evolution of unconditional cooperation is one of the fundamental problems in science. A new solution is proposed to solve this puzzle. We treat this issue with an evolutionary model in which agents play the Prisoner's Dilemma on signed networks. The topology is allowed to co-evolve with relational signs as well as with agent strategies. We introduce a strategy that is conditional on the emotional content embedded in network signs. We show that this strategy acts as a catalyst and creates favorable conditions for the spread of unconditional cooperation. In line with the literature, we found evidence that the evolution of cooperation most likely occurs in networks with relatively high chances of rewiring and with low likelihood of strategy adoption. While a low likelihood of rewiring enhances cooperation, a very high likelihood seems to limit its diffusion. Furthermore, unlike in non-signed networks, cooperation becomes more prevalent in denser topologies.
[ { "created": "Thu, 9 Jan 2014 13:31:07 GMT", "version": "v1" }, { "created": "Sun, 30 Mar 2014 21:09:57 GMT", "version": "v2" }, { "created": "Thu, 24 Apr 2014 09:58:28 GMT", "version": "v3" } ]
2014-04-25
[ [ "Righi", "Simone", "" ], [ "Takács", "Károly", "" ] ]
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1401.1998
Alex Robinson
A.P.L.Robinson, H.Schmitz, J.Pasley
Rapid Embedded Wire Heating via Resistive Guiding of Laser-Generated Fast Electrons as a Hydrodynamic Driver
null
Physics of Plasmas, 20, 122701 (2013)
10.1063/1.4838238
null
physics.plasm-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Resistively guiding laser-generated fast electron beams in targets consisting of a resistive wire embedded in lower $Z$ material should allow one to rapidly heat the wire to over 100eV over a substantial distance without strongly heating the surrounding material. On the multi-ps timescale this can drive hydrodynamic motion in the surrounding material. Thus ultra-intense laser solid interactions have the potential as a controlled driver of radiation hydrodynamics in solid density material. In this paper we assess the laser and target parameters needed to achieve such rapid and controlled heating of the embedded wire.
[ { "created": "Thu, 9 Jan 2014 13:37:57 GMT", "version": "v1" } ]
2014-01-10
[ [ "Robinson", "A. P. L.", "" ], [ "Schmitz", "H.", "" ], [ "Pasley", "J.", "" ] ]
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1401.2000
Andreas Hehn
M. Dolfi, J. Gukelberger, A. Hehn, J. Imri\v{s}ka, K. Pakrouski, T. F. R{\o}nnow, M. Troyer, I. Zintchenko, F. Chirigati, J. Freire, D. Shasha
A model project for reproducible papers: critical temperature for the Ising model on a square lattice
Authors are listed in alphabetical order by institution and name. 5 pages, 4 figures
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cs.CE cond-mat.stat-mech physics.comp-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper we present a simple, yet typical simulation in statistical physics, consisting of large scale Monte Carlo simulations followed by an involved statistical analysis of the results. The purpose is to provide an example publication to explore tools for writing reproducible papers. The simulation estimates the critical temperature where the Ising model on the square lattice becomes magnetic to be Tc /J = 2.26934(6) using a finite size scaling analysis of the crossing points of Binder cumulants. We provide a virtual machine which can be used to reproduce all figures and results.
[ { "created": "Thu, 9 Jan 2014 13:44:28 GMT", "version": "v1" } ]
2014-01-10
[ [ "Dolfi", "M.", "" ], [ "Gukelberger", "J.", "" ], [ "Hehn", "A.", "" ], [ "Imriška", "J.", "" ], [ "Pakrouski", "K.", "" ], [ "Rønnow", "T. F.", "" ], [ "Troyer", "M.", "" ], [ "Zintchenko", "I.", "" ], [ "Chirigati", "F.", "" ], [ "Freire", "J.", "" ], [ "Shasha", "D.", "" ] ]
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1401.2001
Robert V. Mayer
R.V. Mayer
A study of Monte-Carlo method in a teachers' training institute
6 pages, 4 figures,on russian. New educational technologies in higher education institution, Yekaterinburg, 2013, pp. 1 - 7
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cs.CY
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The problem of Monte-Carlo method study at computer simulation lessons in a Teachers' Training Institute is reviewed in the article. The suggested technique envisages the simulation modelling of various stochastic processes. They include transmission of information via a communication link, oscillation of a pendulum in an air stream, deflection of alpha particles by Au atoms, formation of a percolating cluster, etc. (New educational technologies in higher education institution: the collection of reports of the tenth international scientific and methodical conference. Yekaterinburg, UGTU UPI, 2013).
[ { "created": "Thu, 9 Jan 2014 13:47:50 GMT", "version": "v1" } ]
2014-01-10
[ [ "Mayer", "R. V.", "" ] ]
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1401.2002
Elizabeth Boer-Duchemin
Tao Wang, Elizabeth Boer-Duchemin, Genevi\`eve Comtet, Eric Le Moal, G\'erald Dujardin, Aur\'elien Drezet and Serge Huant
Plasmon scattering from holes: from single hole scattering to Young's experiment
null
Nanotechnology 25 (2014) 125202
10.1088/0957-4484/25/12/125202
null
physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this article, the scattering of surface plasmon polaritons (SPPs) into photons at holes is investigated. A local, electrically excited source of SPPs using a scanning tunnelling microscope (STM) produces an outgoing circular plasmon wave on a thick (200 nm) gold film on glass containing holes of 250, 500 and 1000 nm diameter. Fourier plane images of the photons from hole-scattered plasmons show that the larger the hole diameter, the more directional the scattered radiation. These results are confirmed by a model where the hole is considered as a distribution of horizontal dipoles whose relative amplitudes, directions, and phases depend linearly on the local SPP electric field. An SPP-Young's experiment is also performed, where the STM-excited SPP-wave is incident on a pair of 1 $\mu$m diameter holes in the thick gold film. The visibility of the resulting fringes in the Fourier plane is analyzed to show that the polarization of the electric field is maintained when SPPs scatter into photons. From this SPP-Young's experiment, an upper bound of $\approx$ 200 nm for the radius of this STM-excited source of surface plasmon polaritons is determined.
[ { "created": "Thu, 9 Jan 2014 13:49:03 GMT", "version": "v1" } ]
2014-03-03
[ [ "Wang", "Tao", "" ], [ "Boer-Duchemin", "Elizabeth", "" ], [ "Comtet", "Geneviève", "" ], [ "Moal", "Eric Le", "" ], [ "Dujardin", "Gérald", "" ], [ "Drezet", "Aurélien", "" ], [ "Huant", "Serge", "" ] ]
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1401.2006
Pascal Marquet
Pascal Marquet
On the definition of a moist-air potential vorticity
Submitted to the Q. J. R. Meteorol. Soc. in August 2012. Accepted in April 2013. Early view on the QJRMS site http://onlinelibrary.wiley.com/doi/10.1002/qj.2182/abstract. 24 pages, 10 color figures. V2: add the arXiv links of Marquet (2011), Geleyn and Marquet (2012) and Marquet and Geleyn (2013)
null
10.1002/qj.2182
null
physics.ao-ph physics.flu-dyn physics.geo-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A new potential vorticity is derived by using a specific entropy formulation expressed in terms of a moist-air entropy potential temperature. The new formulation is compared with Ertel's version and with others based on virtual and equivalent potential temperatures. The new potential vorticity is subject to conservative properties ensured by the Second Law applied to the moist-air material derivatives. It is shown that the upper tropospheric and stratospheric (dry) structures are nearly the same as those obtained with Ertel's component. Moreover, new structures are observed in the low troposphere, with negative values associated with moist frontal regions. The negative values are observed in the frontal regions where slantwise convection instabilities may take place, but they are smaller than those observed with the equivalent potential vorticity. The main purpose of the article is to diagnose the behaviour of the new potential vorticity from numerical output generated by the ARPEGE NWP model, with the help of isobaric charts and vertical cross-sections. Two inversion methods are suggested. The first method could be based on the invertibility principle verified by the virtual potential vorticity, with a possibility to control and modify separately potential vorticity components in the (dry) upper and (moist) lower atmospheric levels. The other method may consist of an inversion process directly applied to the new moist-air entropy potential vorticity, because the negative values and the solenoidal term are smaller than those observed with equivalent potential vorticity, as shown by numerical evaluations.
[ { "created": "Thu, 9 Jan 2014 13:59:33 GMT", "version": "v1" }, { "created": "Tue, 14 Jan 2014 13:11:52 GMT", "version": "v2" } ]
2014-01-15
[ [ "Marquet", "Pascal", "" ] ]
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1401.2008
Jeya Bharathi
C.Jeyabharathi and A.Pethalakshmi
New Approaches with Chord in Efficient P2P Grid Resource Discovery
14 pages,9 figure
null
null
null
cs.DC
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Grid computing is a type of distributed computing which allows sharing of computer resources through Internet. It not only allows us to share files but also most of the software and hardware resources. An efficient resource discovery mechanism is the fundamental requirements for grid computing systems, as it supports resource management and scheduling of applications. Among various discovery mechanisms,Peer-to-Peer (P2P) technology witnessed rapid development and the key component for this success is efficient lookup applications of P2P. Chord is a P2P structural model widely used as a routing protocol to find resources in grid environment. Plenty of ideas are implemented by researchers to improve the lookup performance of chord protocol in Grid environment. In this paper, we discuss the recent researches made on Chord Structured P2P protocol and present our proposed methods in which we use the address of Recently Visited Node (RVN) and fuzzy technique to easily locate the grid resources by reducing message complexity and time complexity.
[ { "created": "Thu, 9 Jan 2014 14:09:16 GMT", "version": "v1" } ]
2015-06-01
[ [ "Jeyabharathi", "C.", "" ], [ "Pethalakshmi", "A.", "" ] ]
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1401.2010
Samuele Giraudo
Samuele Giraudo, Jean-Gabriel Luque, Ludovic Mignot and Florent Nicart
Operads, quasiorders, and regular languages
32 pages
Advances in Applied Mathematics, 75, 56--93, 2016
null
null
cs.FL math.CO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We generalize the construction of multitildes in the aim to provide multitilde operators for regular languages. We show that the underliying algebraic structure involves the action of some operads. An operad is an algebraic structure that mimics the composition of the functions. The involved operads are described in terms of combinatorial objects. These operads are obtained from more primitive objects, namely precompositions, whose algebraic counter-parts are investigated. One of these operads acts faithfully on languages in the sense that two different operators act in two different ways.
[ { "created": "Thu, 9 Jan 2014 14:19:52 GMT", "version": "v1" }, { "created": "Thu, 21 Jan 2016 07:26:14 GMT", "version": "v2" } ]
2016-01-22
[ [ "Giraudo", "Samuele", "" ], [ "Luque", "Jean-Gabriel", "" ], [ "Mignot", "Ludovic", "" ], [ "Nicart", "Florent", "" ] ]
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1401.2011
Joseph Y. Halpern
Joseph Y. Halpern and Willemien Kets
A logic for reasoning about ambiguity
Some of the material in this paper appeared in preliminary form in "Ambiguous langage and differences of belief" (see arXiv:1203.0699)
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cs.AI cs.GT cs.LO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Standard models of multi-agent modal logic do not capture the fact that information is often \emph{ambiguous}, and may be interpreted in different ways by different agents. We propose a framework that can model this, and consider different semantics that capture different assumptions about the agents' beliefs regarding whether or not there is ambiguity. We examine the expressive power of logics of ambiguity compared to logics that cannot model ambiguity, with respect to the different semantics that we propose.
[ { "created": "Thu, 9 Jan 2014 14:19:54 GMT", "version": "v1" } ]
2014-01-10
[ [ "Halpern", "Joseph Y.", "" ], [ "Kets", "Willemien", "" ] ]
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1401.2018
Shoubin Kong
Shoubin Kong, Qiaozhu Mei, Ling Feng, Zhe Zhao, Fei Ye
On the Real-time Prediction Problems of Bursting Hashtags in Twitter
null
null
null
null
cs.SI physics.soc-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Hundreds of thousands of hashtags are generated every day on Twitter. Only a few become bursting topics. Among the few, only some can be predicted in real-time. In this paper, we take the initiative to conduct a systematic study of a series of challenging real-time prediction problems of bursting hashtags. Which hashtags will become bursting? If they do, when will the burst happen? How long will they remain active? And how soon will they fade away? Based on empirical analysis of real data from Twitter, we provide insightful statistics to answer these questions, which span over the entire lifecycles of hashtags.
[ { "created": "Thu, 9 Jan 2014 14:35:18 GMT", "version": "v1" }, { "created": "Tue, 3 Jun 2014 13:38:33 GMT", "version": "v2" } ]
2014-06-04
[ [ "Kong", "Shoubin", "" ], [ "Mei", "Qiaozhu", "" ], [ "Feng", "Ling", "" ], [ "Zhao", "Zhe", "" ], [ "Ye", "Fei", "" ] ]
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null
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1401.2025
Simon Bogner
Simon Bogner, Swati Mohanty, Ulrich R\"ude
Drag correlation for dilute and moderately dense fluid-particle systems using the lattice Boltzmann method
Preprint submitted to Elsevier. Comments welcome!
null
10.1016/j.ijmultiphaseflow.2014.10.001
null
physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This paper presents a numerical study of flow through static random assemblies of monodisperse, spherical particles. A lattice Boltzmann approach based on a two relaxation time collision operator is used to obtain reliable predictions of the particle drag by direct numerical simulation. From these predictions a closure law $F(Re, {\varphi})$ of the drag force relationship to the bed density ${\varphi}$ and the particle Reynolds number $Re$ is derived. The present study includes densities ${\varphi}$ ranging from $0.01$ to $0.35$ with Re ranging up to $300$, that is compiled into a single drag correlation valid for the whole range. The corelation has a more compact expression compared to others previously reported in literature. At low particle densities, the new correlation is close to the widely used Wen & Yu - correlation. Recently, there has been reported a discrepancy between results obtained using different numerical methods, namely the comprehensive lattice Boltzmann study of Beetstra et al. (2007) and the predictions based on an immersed boundary - pseudo-spectral Navier-Stokes approach (Tenneti et al., 2011). The present study excludes significant finite resolution effects, which have been suspected to cause the reported deviations, but does not coincide exactly with either of the previous studies. This indicates the need for yet more accurate simulation methods in the future.
[ { "created": "Thu, 9 Jan 2014 15:13:34 GMT", "version": "v1" }, { "created": "Tue, 22 Apr 2014 20:26:58 GMT", "version": "v2" }, { "created": "Tue, 7 Oct 2014 08:59:46 GMT", "version": "v3" } ]
2014-10-08
[ [ "Bogner", "Simon", "" ], [ "Mohanty", "Swati", "" ], [ "Rüde", "Ulrich", "" ] ]
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1401.2028
Riccardo Artoni
Riccardo Artoni and Andrea C. Santomaso and Fabio Gabrieli and Diego Tono and Simonetta Cola
Collapse of quasi-two-dimensional wet granular columns
8 pages, 14 figures
Phys. Rev. E 87, 032205 (2013)
10.1103/PhysRevE.87.032205
null
cond-mat.soft physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This paper deals with the experimental characterization of the collapse of wet granular columns in the pendular state, with the purpose of collecting data on triggering and jamming phenomena in wet granular media. The final deposit shape and the runout dynamics were studied for samples of glass beads, varying particle diameter, liquid surface tension, and liquid amount. We show how the runout distance decreases with increasing water amount (reaching a plateau for $w>1 \%$) and increases with increasing Bond number, while the top and toe angles and the final deposit height increase with increasing water amount and decrease with decreasing Bond number. Dimensional analysis allowed to discuss possible scalings for the runout length and the top and toe angles: a satisfying scaling was found, based on the combination of Bond number and liquid amount.
[ { "created": "Thu, 9 Jan 2014 15:26:15 GMT", "version": "v1" } ]
2014-01-10
[ [ "Artoni", "Riccardo", "" ], [ "Santomaso", "Andrea C.", "" ], [ "Gabrieli", "Fabio", "" ], [ "Tono", "Diego", "" ], [ "Cola", "Simonetta", "" ] ]
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1401.2029
Fung Lam
F. Lam
On the Well-posedness of Magnetohydrodynamics Equations for Incompressible Electrically-Conducting Fluids
23 pages, no plots. Revised version with corrections
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null
null
physics.flu-dyn math.AP
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
It is shown that the Cauchy problem of the equations in magnetohydrodynamics in the whole space is globally well-posed for any initial smooth and localized data. In general, the mathematical structure of solution shows that the coupled magnetic-vortical field has the characters of turbulence, if the initial data exceed certain size. In particular, if a strong magnetic force dominates the flow evolution, the current density possesses a cubic non-linearity. The solution of the non-linear problem has been constructed and has been expressed as an infinite series.
[ { "created": "Thu, 9 Jan 2014 15:31:02 GMT", "version": "v1" }, { "created": "Tue, 13 Jun 2023 10:15:44 GMT", "version": "v2" } ]
2023-06-14
[ [ "Lam", "F.", "" ] ]
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1401.2033
Sahin Kaya Ozdemir Dr
Sahin Kaya Ozdemir, Jiangang Zhu, Xu Yang, Bo Peng, Huzeyfe Yilmaz, Lina He, Faraz Monifi, Gui Lu Long, Lan Yang
Raman-gain induced loss-compensation in whispering-gallery-microresonators and single-nanoparticle detection with whispering-gallery Raman-microlasers
25 pages, 8 figures, 70 references
Proceedings of the National Academy of Sciences PNAS, 111, E3836 (2014)
10.1073/pnas.1408283111
null
physics.optics physics.ins-det
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Recently optical whispering-gallery-mode resonators (WGMRs) have emerged as promising platforms to achieve label-free detection of nanoscale objects and to reach single molecule sensitivity. The ultimate detection performance of WGMRs are limited by energy dissipation in the material they are fabricated from. Up to date, to improve detection limit, either rare-earth ions are doped into the WGMR to compensate losses or plasmonic resonances are exploited for their superior field confinement. Here, we demonstrate, for the first time, enhanced detection of single-nanoparticle induced mode-splitting in a silica WGMR via Raman-gain assisted loss-compensation and WGM Raman lasing. Notably, we detected and counted individual dielectric nanoparticles down to a record low radius of 10 nm by monitoring a beatnote signal generated when split Raman lasing lines are heterodyne-mixed at a photodetector. This dopant-free scheme retains the inherited biocompatibility of silica, and could find widespread use for sensing in biological media. It also opens the possibility of using intrinsic Raman or parametric gain in other systems, where dissipation hinders the progress of the field and limits applications.
[ { "created": "Thu, 9 Jan 2014 15:47:20 GMT", "version": "v1" } ]
2014-10-28
[ [ "Ozdemir", "Sahin Kaya", "" ], [ "Zhu", "Jiangang", "" ], [ "Yang", "Xu", "" ], [ "Peng", "Bo", "" ], [ "Yilmaz", "Huzeyfe", "" ], [ "He", "Lina", "" ], [ "Monifi", "Faraz", "" ], [ "Long", "Gui Lu", "" ], [ "Yang", "Lan", "" ] ]
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1401.2038
Tobias Kretz
Johanna Bamberger, Anna-Lena Ge{\ss}ler, Peter Heitzelmann, Sara Korn, Rene Kahlmeyer, Xue Hao Lu, Qi Hao Sang, Zhi Jie Wang, Guan Zong Yuan, Michael Gau{\ss}, Tobias Kretz
Crowd Research at School: Crossing Flows
contribution to proceedings of Traffic and Granular Flow 2013 held in J\"ulich, Germany
null
null
null
physics.soc-ph cs.MA
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
It has become widely known that when two flows of pedestrians cross stripes emerge spontaneously by which the pedestrians of the two walking directions manage to pass each other in an orderly manner. In this work, we report about the results of an experiment on crossing flows which has been carried out at a German school. These results include that previously reported high flow volumes on the crossing area can be confirmed. The empirical results are furthermore compared to the results of a simulation model which succesfully could be calibrated to catch the specific properties of the population of participants.
[ { "created": "Thu, 9 Jan 2014 15:52:50 GMT", "version": "v1" } ]
2014-01-10
[ [ "Bamberger", "Johanna", "" ], [ "Geßler", "Anna-Lena", "" ], [ "Heitzelmann", "Peter", "" ], [ "Korn", "Sara", "" ], [ "Kahlmeyer", "Rene", "" ], [ "Lu", "Xue Hao", "" ], [ "Sang", "Qi Hao", "" ], [ "Wang", "Zhi Jie", "" ], [ "Yuan", "Guan Zong", "" ], [ "Gauß", "Michael", "" ], [ "Kretz", "Tobias", "" ] ]
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null
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1401.2039
Konstantin Petrov
Denis Barthou, Olivier Brand-Foissac, Romain Dolbeau, Gilbert Grosdidier, Christina Eisenbeis, Michael Kruse, Olivier Pene, Konstantin Petrov, Claude Tadonki
Automated Code Generation for Lattice Quantum Chromodynamics and beyond
null
null
10.1088/1742-6596/510/1/012005
LPT-Orsay-13-142, hal-00926513
hep-lat cs.DC cs.PL
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present here our ongoing work on a Domain Specific Language which aims to simplify Monte-Carlo simulations and measurements in the domain of Lattice Quantum Chromodynamics. The tool-chain, called Qiral, is used to produce high-performance OpenMP C code from LaTeX sources. We discuss conceptual issues and details of implementation and optimization. The comparison of the performance of the generated code to the well-established simulation software is also made.
[ { "created": "Thu, 9 Jan 2014 15:56:31 GMT", "version": "v1" } ]
2015-06-18
[ [ "Barthou", "Denis", "" ], [ "Brand-Foissac", "Olivier", "" ], [ "Dolbeau", "Romain", "" ], [ "Grosdidier", "Gilbert", "" ], [ "Eisenbeis", "Christina", "" ], [ "Kruse", "Michael", "" ], [ "Pene", "Olivier", "" ], [ "Petrov", "Konstantin", "" ], [ "Tadonki", "Claude", "" ] ]
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1401.2044
Riccardo Artoni
Riccardo Artoni and Andrea C. Santomaso and Massimiliano Go' and Paolo Canu
Scaling Laws for the Slip Velocity in Dense Granular Flows
5 pages, 4 figures
Phys. Rev. Lett. 108, 238002 (2012)
10.1103/PhysRevLett.108.238002
null
cond-mat.soft physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this Letter, the 2-dimensional dense flow of polygonal particles on an incline with a flat frictional inferior boundary is analyzed by means of contact dynamics discrete element simulations, in order to develop boundary conditions for continuum models of dense granular flows. We show the evidence that the global slip phenomenon deviates significantly from simple sliding: a finite slip velocity is generally found for shear forces lower than the sliding threshold for particle-wall contacts. We determined simple scaling laws for the dependence of the slip velocity on shear rate, normal and shear stresses, and material parameters.The importance of a correct determination of the slip at the base of the incline, which is crucial for the calculation of flow rates, is discussed in relation to natural flows.
[ { "created": "Thu, 9 Jan 2014 16:02:08 GMT", "version": "v1" } ]
2014-01-10
[ [ "Artoni", "Riccardo", "" ], [ "Santomaso", "Andrea C.", "" ], [ "Go'", "Massimiliano", "" ], [ "Canu", "Paolo", "" ] ]
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1401.2046
Justin Evans
The IceCube-PINGU Collaboration
Letter of Intent: The Precision IceCube Next Generation Upgrade (PINGU)
This is a significant update to the original LoI, following three years of advanced studies. Through optimisation of the detector design and analysis techniques, similar physics capabilities are demonstrated for a 26-string detector array, compared to the original 40-string design. The smaller array may be deployed in less time (two seasons compared to three) and at reduced estimated costs
null
null
null
physics.ins-det astro-ph.HE astro-ph.IM hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The Precision IceCube Next Generation Upgrade (PINGU) is a proposed low-energy in-fill array of the IceCube Neutrino Observatory. Leveraging technology proven with IceCube, PINGU will feature the world's largest effective volume for neutrinos at an energy threshold of a few GeV, improving the sensitivity to several aspects of neutrino oscillation physics at modest cost. With its unprecedented statistical sample of low-energy atmospheric neutrinos, PINGU will have highly competitive sensitivity to $\nu_{\mu}$ disappearance, the $\theta_{23}$ octant, and maximal mixing, will make the world's best $\nu_{\tau}$ appearance measurement, allowing a unique probe of the unitarity of the PMNS mixing matrix, and will be able to distinguish the neutrino mass ordering at $3\sigma$ significance with less than 4 years of data. PINGU can also extend the indirect search for solar WIMP dark matter complimentary to the on-going and planned direct dark matter experiments. At the lower end of the energy range, PINGU may use neutrino tomography to directly probe the composition of the Earth's core. With its increased module density, PINGU will improve IceCube's sensitivity to galactic supernova neutrino bursts and enable it to extract the neutrino energy spectral shape.
[ { "created": "Thu, 9 Jan 2014 16:03:22 GMT", "version": "v1" }, { "created": "Tue, 5 Sep 2017 17:21:42 GMT", "version": "v2" } ]
2017-09-07
[ [ "PINGU Collaboration", "", "" ] ]
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Letter of Intent: The Precision IceCube Next Generation Upgrade (PINGU)
https://arxiv.org/abs/1401.2046v2
https://arxiv.org/pdf/1401.2046v2.pdf
https://github.com/icecube/pisa
false
false
https://paperswithcode.com/paper/letter-of-intent-the-precision-icecube-next
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1401.2051
Agunbiade Olusanya yinka
Olusanya Y. Agunbiade, Tranos Zuva, Awosejo O. Johnson and Keneilwe Zuva
Enhancement performance of road recognition system of autonomous robots in shadow scenario
Signal & Image Processing : An International Journal (SIPIJ) Vol.4, No.6, December 2013
null
null
null
cs.RO cs.CV
http://creativecommons.org/licenses/by-nc-sa/3.0/
Road region recognition is a main feature that is gaining increasing attention from intellectuals because it helps autonomous vehicle to achieve a successful navigation without accident. However, different techniques based on camera sensor have been used by various researchers and outstanding results have been achieved. Despite their success, environmental noise like shadow leads to inaccurate recognition of road region which eventually leads to accident for autonomous vehicle. In this research, we conducted an investigation on shadow and its effects, optimized the road region recognition system of autonomous vehicle by introducing an algorithm capable of detecting and eliminating the effects of shadow. The experimental performance of our system was tested and compared using the following schemes: Total Positive Rate (TPR), False Negative Rate (FNR), Total Negative Rate (TNR), Error Rate (ERR) and False Positive Rate (FPR). The performance result of the system improved on road recognition in shadow scenario and this advancement has added tremendously to successful navigation approaches for autonomous vehicle.
[ { "created": "Thu, 9 Jan 2014 16:09:57 GMT", "version": "v1" } ]
2014-01-10
[ [ "Agunbiade", "Olusanya Y.", "" ], [ "Zuva", "Tranos", "" ], [ "Johnson", "Awosejo O.", "" ], [ "Zuva", "Keneilwe", "" ] ]
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1401.2056
Hamsalekha Venkatesh
Vanaja Ramaswamy, Abinaya Sivarasu, Bharghavi Sridharan and Hamsalekha Venkatesh
A Bi-Scheduler Algorithm for Frame Aggregation in IEEE 802.11n
9 pages,6 figures, International Journal of Wireless & Mobile Networks (IJWMN) Vol. 5, No. 6
International Journal of Wireless & Mobile Networks (IJWMN) Vol. 5, No. 6, December 2013
null
null
cs.NI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
IEEE 802.11n mainly aims to provide high throughput, reliability and good security over its other previous standards. The performance of 802.11n is very effective on the saturated traffic through the use of frame aggregation. But this frame aggregation will not effectively function in all scenarios. The main objective of this paper is to improve the throughput of the wireless LAN through effective frame aggregation using scheduler mechanism. The Bi-Scheduler algorithm proposed in this article aims to segregate frames based on their access categories. The outer scheduler separates delay sensitive applications from the incoming burst of multi-part data and also decides whether to apply Aggregated - MAC Service Data Unit (A-MSDU) aggregation technique or to send the data without any aggregation. The inner scheduler schedules the remaining (delay-insensitive, background and best-effort) packets using Aggregated-MAC Protocol Data unit (A-MPDU) aggregation technique
[ { "created": "Thu, 9 Jan 2014 16:23:12 GMT", "version": "v1" } ]
2014-01-10
[ [ "Ramaswamy", "Vanaja", "" ], [ "Sivarasu", "Abinaya", "" ], [ "Sridharan", "Bharghavi", "" ], [ "Venkatesh", "Hamsalekha", "" ] ]
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1401.2058
Rachit Puri
Rachit Puri
Gesture recognition based mouse events
9 pages, IJCSIT
null
null
null
cs.CV
http://creativecommons.org/licenses/by/3.0/
This paper presents the maneuver of mouse pointer and performs various mouse operations such as left click, right click, double click, drag etc using gestures recognition technique. Recognizing gestures is a complex task which involves many aspects such as motion modeling, motion analysis, pattern recognition and machine learning. Keeping all the essential factors in mind a system has been created which recognizes the movement of fingers and various patterns formed by them. Color caps have been used for fingers to distinguish it from the background color such as skin color. Thus recognizing the gestures various mouse events have been performed. The application has been created on MATLAB environment with operating system as windows 7.
[ { "created": "Thu, 9 Jan 2014 16:26:54 GMT", "version": "v1" } ]
2014-01-10
[ [ "Puri", "Rachit", "" ] ]
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1401.2065
Oren Weimann
Danny Hermelin, Gad M. Landau, Yuri Rabinovich, Oren Weimann
Binary Jumbled Pattern Matching via All-Pairs Shortest Paths
null
null
null
null
cs.DS
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In binary jumbled pattern matching we wish to preprocess a binary string $S$ in order to answer queries $(i,j)$ which ask for a substring of $S$ that is of size $i$ and has exactly $j$ 1-bits. The problem naturally generalizes to node-labeled trees and graphs by replacing "substring" with "connected subgraph". In this paper, we give an ${n^2}/{2^{\Omega(\log n/\log \log n)^{1/2}}}$ time solution for both strings and trees. This odd-looking time complexity improves the state of the art $O(n^2/\log^2 n)$ solutions by more than any poly-logarithmic factor. It originates from the recent seminal algorithm of Williams for min-plus matrix multiplication. We obtain the result by giving a black box reduction from trees to strings. This is then combined with a reduction from strings to min-plus matrix multiplications.
[ { "created": "Thu, 9 Jan 2014 16:38:21 GMT", "version": "v1" }, { "created": "Sun, 12 Jan 2014 17:54:35 GMT", "version": "v2" }, { "created": "Fri, 21 Feb 2014 11:19:30 GMT", "version": "v3" }, { "created": "Sun, 29 Jun 2014 14:18:47 GMT", "version": "v4" } ]
2014-07-01
[ [ "Hermelin", "Danny", "" ], [ "Landau", "Gad M.", "" ], [ "Rabinovich", "Yuri", "" ], [ "Weimann", "Oren", "" ] ]
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1401.2071
Stefan Hougardy
Stefan Hougardy and Mirko Wilde
On the Nearest Neighbor Rule for the Metric Traveling Salesman Problem
null
null
null
null
cs.DS cs.DM math.CO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a very simple family of traveling salesman instances with $n$ cities where the nearest neighbor rule may produce a tour that is $\Theta(\log n)$ times longer than an optimum solution. Our family works for the graphic, the euclidean, and the rectilinear traveling salesman problem at the same time. It improves the so far best known lower bound in the euclidean case and proves for the first time a lower bound in the rectilinear case.
[ { "created": "Thu, 9 Jan 2014 16:52:58 GMT", "version": "v1" } ]
2014-01-10
[ [ "Hougardy", "Stefan", "" ], [ "Wilde", "Mirko", "" ] ]
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1401.2079
Andrea Longhin
N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, T. Asada, D. Autiero, A. Ben Dhahbi, A. Badertscher, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, F. Brunet, G. Brunetti, A. Buonaura, S. Buontempo, B. Buettner, L. Chaussard, M. Chernyavsky, V. Chiarella, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, J. Favier, T. Ferber, G. Ferone, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, F. Grianti, M. Guler, C. Gustavino, C. Hagner, K. Hakamata, T. Hara, T. Hayakawa, M. Hierholzer, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, M. Ishikawa, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, T. Katsuragawa, J. Kawada, H. Kawahara, J. H. Kim, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, G. Mandrioli, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, P. Migliozzi, S. Mikado, M. Miyanishi, E. Miyashita, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, K. Pretzl, F. Pupilli, R. Rescigno, M. Roda, H. Rokujo, T. Roganova, G. Rosa, I. Rostovtseva, A. Rubbia, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, W. Schmidt-Parzefal, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strauss, P. Strolin, K. Suzuki, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, J. Yoshida, M. Yoshimoto, Y. Zaitsev, S. Zemskova, A. Zghiche
Evidence for $\nu_\mu \to \nu_\tau$ appearance in the CNGS neutrino beam with the OPERA experiment
9 pages, 5 figures, 1 tables
Phys. Rev. D 89, 051102 (2014)
10.1103/PhysRevD.89.051102
null
hep-ex physics.ins-det
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The OPERA experiment is designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode i.e. through the direct observation of the $\tau$ lepton in $\nu_{\tau}$ charged current interactions. The experiment has taken data for five years, since 2008, with the CERN Neutrino to Gran Sasso beam. Previously, two $\nu_{\tau}$ candidates with a $\tau$ decaying into hadrons were observed in a sub-sample of data of the 2008-2011 runs. Here we report the observation of a third $\nu_\tau$ candidate in the $\tau^-\to\mu^-$ decay channel coming from the analysis of a sub-sample of the 2012 run. Taking into account the estimated background, the absence of $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations is excluded at the 3.4 $\sigma$ level.
[ { "created": "Thu, 9 Jan 2014 17:09:02 GMT", "version": "v1" } ]
2014-03-12
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1401.2080
Jeremie Bec
Jeremie Bec, Holger Homann, and Giorgio Krstulovic
Clustering, fronts, and heat transfer in turbulent suspensions of heavy particles
4 pages, 5 figures
null
10.1103/PhysRevLett.112.234503
null
physics.flu-dyn nlin.CD
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Heavy inertial particles transported by a turbulent flow are shown to concentrate in the regions where an advected passive scalar, such as temperature, displays very strong front-like discontinuities. This novel effect is responsible for extremely high levels of fluctuations for the passive field sampled by the particles that impacts the heat fluxes exchanged between the particles and the surrounding fluid. Instantaneous and averaged heat fluxes are shown to follow strongly intermittent statistics and anomalous scaling laws.
[ { "created": "Thu, 9 Jan 2014 17:11:19 GMT", "version": "v1" } ]
2015-06-18
[ [ "Bec", "Jeremie", "" ], [ "Homann", "Holger", "" ], [ "Krstulovic", "Giorgio", "" ] ]
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1401.2083
C\'esar Domingo-Pardo
C\'esar Domingo-Pardo
i-TED: A novel concept for high-sensitivity (n,$\gamma$) cross section measurements
Article submitted to Nucl. Instr. and Meth. in Phys. Res. A
null
null
null
physics.ins-det
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A new method for measuring \ngr cross sections aiming at enhanced signal-to-background ratio is presented. This new approach is based on the combination of the pulse-height weighting technique with a total energy detection system that features $\gamma$-ray imaging capability (i-TED). The latter allows one to exploit Compton imaging techniques to discriminate between true capture $\gamma$-rays arising from the sample under study and background $\gamma$-rays coming from contaminant neutron (prompt or delayed) captures in the surrounding environment. A general proof-of-concept detection system for this application is presented in this article together with a description of the imaging method and a conceptual demonstration based on Monte Carlo simulations.
[ { "created": "Thu, 9 Jan 2014 17:18:11 GMT", "version": "v1" }, { "created": "Wed, 12 Nov 2014 21:56:38 GMT", "version": "v2" }, { "created": "Thu, 12 Mar 2015 14:22:15 GMT", "version": "v3" }, { "created": "Wed, 14 Oct 2015 08:45:25 GMT", "version": "v4" } ]
2015-10-15
[ [ "Domingo-Pardo", "César", "" ] ]
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1401.2086
L.A. Prashanth
H.L Prasad, L.A.Prashanth and Shalabh Bhatnagar
Actor-Critic Algorithms for Learning Nash Equilibria in N-player General-Sum Games
null
null
null
null
cs.GT cs.LG stat.ML
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider the problem of finding stationary Nash equilibria (NE) in a finite discounted general-sum stochastic game. We first generalize a non-linear optimization problem from Filar and Vrieze [2004] to a $N$-player setting and break down this problem into simpler sub-problems that ensure there is no Bellman error for a given state and an agent. We then provide a characterization of solution points of these sub-problems that correspond to Nash equilibria of the underlying game and for this purpose, we derive a set of necessary and sufficient SG-SP (Stochastic Game - Sub-Problem) conditions. Using these conditions, we develop two actor-critic algorithms: OFF-SGSP (model-based) and ON-SGSP (model-free). Both algorithms use a critic that estimates the value function for a fixed policy and an actor that performs descent in the policy space using a descent direction that avoids local minima. We establish that both algorithms converge, in self-play, to the equilibria of a certain ordinary differential equation (ODE), whose stable limit points coincide with stationary NE of the underlying general-sum stochastic game. On a single state non-generic game (see Hart and Mas-Colell [2005]) as well as on a synthetic two-player game setup with $810,000$ states, we establish that ON-SGSP consistently outperforms NashQ ([Hu and Wellman, 2003] and FFQ [Littman, 2001] algorithms.
[ { "created": "Wed, 8 Jan 2014 12:47:15 GMT", "version": "v1" }, { "created": "Thu, 2 Jul 2015 20:09:17 GMT", "version": "v2" } ]
2015-07-06
[ [ "Prasad", "H. L", "" ], [ "Prashanth", "L. A.", "" ], [ "Bhatnagar", "Shalabh", "" ] ]
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1401.2098
Fazal Ghafoor
F. Ghafoor and R.G. Nazmitdinov
Triplet absorption spectroscopy and electromagnetically induced transparency
11 pages, 7 figures
J.Phys.B: At. Mol. Opt. Phys.49 (2016)175502
10.1088/0953-4075/49/17/175502
null
physics.optics quant-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Coherence phenomena in four-level atomic system, cyclicly driven by three coherent fields, are investigated thoroughly at zero and weak magnetic fields. Each strongly interacting atomic state is converted to a triplet due to a dynamical Stark effect. Two dark lines with a Fano-like profile are arising in the triplet absorption spectrum with anomalous dispersions. We provide the conditions to control the widths of the transparency windows by means of the relative phase of the driving fields and the intensity of the microwave field, that closes the optical system loop. The effect of the Doppler broadening on results of the triplet absorption spectroscopy is analysed in detail.
[ { "created": "Thu, 9 Jan 2014 17:48:40 GMT", "version": "v1" }, { "created": "Fri, 10 Jan 2014 13:14:31 GMT", "version": "v2" }, { "created": "Sat, 1 Feb 2014 21:35:47 GMT", "version": "v3" }, { "created": "Fri, 16 Sep 2016 11:30:03 GMT", "version": "v4" }, { "created": "Mon, 19 Sep 2016 12:28:55 GMT", "version": "v5" } ]
2016-09-20
[ [ "Ghafoor", "F.", "" ], [ "Nazmitdinov", "R. G.", "" ] ]
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1401.2101
Massimo Carro
Massimo Carro
NoSQL Databases
57 pages, 18 figures
null
null
null
cs.DB
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this document, I present the main notions of NoSQL databases and compare four selected products (Riak, MongoDB, Cassandra, Neo4J) according to their capabilities with respect to consistency, availability, and partition tolerance, as well as performance. I also propose a few criteria for selecting the right tool for the right situation.
[ { "created": "Thu, 9 Jan 2014 17:55:33 GMT", "version": "v1" } ]
2014-01-10
[ [ "Carro", "Massimo", "" ] ]
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1401.2103
Corentin Herbert
Corentin Herbert, Annick Pouquet, Raffaele Marino
Restricted Equilibrium and the Energy Cascade in Rotating and Stratified Flows
null
J. Fluid Mech. vol 758, pp 374-406 (2014)
10.1017/jfm.2014.540
null
physics.flu-dyn cond-mat.stat-mech physics.ao-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Most of the turbulent flows appearing in nature (e.g. geophysical and astrophysical flows) are subjected to strong rotation and stratification. These effects break the symmetries of classical, homogenous isotropic turbulence. In doing so, they introduce a natural decomposition of phase space in terms of wave modes and potential vorticity modes. The appearance of a new time scale associated to the propagation of waves, in addition to the eddy turnover time, increases the complexity of the energy transfers between the various scales; nonlinearly interacting waves may dominate at some scales while balanced motion may prevail at others. In the end, it is difficult to predict \emph{a priori} if the energy cascades downscale as in homogeneous isotropic turbulence, upscale as expected from balanced dynamics, or follows yet another phenomenology. In this paper, we suggest a theoretical approach based on equilibrium statistical mechanics for the ideal system, inspired from the restricted partition function formalism introduced in metastability studies. In this framework, we show analytically that in the presence of rotation, when the dynamics is restricted to the slow modes, the equilibrium energy spectrum features an infrared divergence characteristic of an inverse cascade regime, whereas this is not the case for purely stratified flows.
[ { "created": "Thu, 9 Jan 2014 17:57:39 GMT", "version": "v1" } ]
2015-09-11
[ [ "Herbert", "Corentin", "" ], [ "Pouquet", "Annick", "" ], [ "Marino", "Raffaele", "" ] ]
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1401.2107
Dragan Vidakovic Novak
Dragan Vidakovic, Dusko Parezanovic, Zoran Vucetic
Minimizing the Time of Detection of Large (Probably) Prime Numbers
11 pages
null
null
null
cs.CR
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper we present the experimental results that more clearly than any theory suggest an answer to the question: when in detection of large (probably) prime numbers to apply, a very resource demanding, Miller-Rabin algorithm. Or, to put it another way, when the dividing by first several tens of prime numbers should be replaced by primality testing? As an innovation, the procedure above will be supplemented by considering the use of the well-known Goldbach's conjecture in the solving of this and some other important questions about the RSA cryptosystem, always guided by the motto "do not harm" - neither the security nor the time spent.
[ { "created": "Thu, 9 Jan 2014 18:20:04 GMT", "version": "v1" } ]
2014-01-10
[ [ "Vidakovic", "Dragan", "" ], [ "Parezanovic", "Dusko", "" ], [ "Vucetic", "Zoran", "" ] ]
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1401.2113
Vinay Prabhu
Rohit Negi, Vinay Uday Prabhu and Miguel Rodrigues
Latent Sentiment Detection in Online Social Networks: A Communications-oriented View
13 pages, 6 figures, Submitted to ICC 2014
null
null
null
cs.SI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, we consider the problem of latent sentiment detection in Online Social Networks such as Twitter. We demonstrate the benefits of using the underlying social network as an Ising prior to perform network aided sentiment detection. We show that the use of the underlying network results in substantially lower detection error rates compared to strictly features-based detection. In doing so, we introduce a novel communications-oriented framework for characterizing the probability of error, based on information-theoretic analysis. We study the variation of the calculated error exponent for several stylized network topologies such as the complete network, the star network and the closed-chain network, and show the importance of the network structure in determining detection performance.
[ { "created": "Thu, 9 Jan 2014 18:33:33 GMT", "version": "v1" } ]
2014-01-10
[ [ "Negi", "Rohit", "" ], [ "Prabhu", "Vinay Uday", "" ], [ "Rodrigues", "Miguel", "" ] ]
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1401.2118
Alexey Frolov Dr.
Alexey Frolov, Pavel Rybin and Victor Zyablov
On the Capacity of the Multiuser Vector Adder Channel
5 pages, 3 figures, submitted to IEEE ISIT 2014
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cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We investigate the capacity of the $Q$-frequency $S$-user vector adder channel (channel with intensity information) introduced by Chang and Wolf. Both coordinated and uncoordinated types of transmission are considered. Asymptotic (under the conditions $Q \to \infty$, $S = \gamma Q$ and $0 < \gamma < \infty$) upper and lower bounds on the relative (per subchannel) capacity are derived. The lower bound for the coordinated case is shown to increase when $\gamma$ grows. At the same time the relative capacity for the uncoordinated case is upper bounded by a constant.
[ { "created": "Thu, 9 Jan 2014 19:05:59 GMT", "version": "v1" } ]
2014-01-10
[ [ "Frolov", "Alexey", "" ], [ "Rybin", "Pavel", "" ], [ "Zyablov", "Victor", "" ] ]
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1401.2119
Ahmed El Shafie
Ahmed El Shafie and Tamer Khattab
Maximum Throughput for a Cognitive Radio Multi-Antenna User with Multiple Primary Users
null
null
null
null
cs.IT cs.NI math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We investigate a cognitive radio scenario involving a single cognitive transmitter equipped with $\mathcal{K}$ antennas sharing the spectrum with $\mathcal{M}$ primary users (PUs) transmitting over orthogonal bands. Each terminal has a queue to store its incoming traffic. We propose a novel protocol where the cognitive user transmits its packet over a channel formed by the aggregate of the inactive primary bands. We study the impact of the number of PUs, sensing errors, and the number of antennas on the maximum secondary stable throughput.
[ { "created": "Thu, 9 Jan 2014 19:07:22 GMT", "version": "v1" }, { "created": "Mon, 9 Jun 2014 18:02:52 GMT", "version": "v2" } ]
2014-06-10
[ [ "Shafie", "Ahmed El", "" ], [ "Khattab", "Tamer", "" ] ]
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1401.2120
Alexey Frolov Dr.
Alexey Frolov and Pavel Rybin
Upper Bounds on the Minimum Distance of Quasi-Cyclic LDPC codes Revisited
4 pages, 1 figure, submitted to IEEE ISIT 2014
null
null
null
cs.IT math.IT
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Two upper bounds on the minimum distance of type-1 quasi-cyclic low-density parity-check (QC LDPC) codes are derived. The necessary condition is given for the minimum code distance of such codes to grow linearly with the code length.
[ { "created": "Thu, 9 Jan 2014 19:08:45 GMT", "version": "v1" } ]
2014-01-10
[ [ "Frolov", "Alexey", "" ], [ "Rybin", "Pavel", "" ] ]
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1401.2121
Carlos Pedro dos Santos Gon\c{c}alves
Carlos Pedro Gon\c{c}alves
Emotional Responses in Artificial Agent-Based Systems: Reflexivity and Adaptation in Artificial Life
null
null
null
null
cs.AI nlin.AO
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The current work addresses a virtual environment with self-replicating agents whose decisions are based on a form of "somatic computation" (soma - body) in which basic emotional responses, taken in parallelism to actual living organisms, are introduced as a way to provide the agents with greater reflexive abilities. The work provides a contribution to the field of Artificial Intelligence (AI) and Artificial Life (ALife) in connection to a neurobiology-based cognitive framework for artificial systems and virtual environments' simulations. The performance of the agents capable of emotional responses is compared with that of self-replicating automata, and the implications of research on emotions and AI, in connection to both virtual agents as well as robots, is addressed regarding possible future directions and applications.
[ { "created": "Thu, 9 Jan 2014 19:13:02 GMT", "version": "v1" } ]
2014-01-10
[ [ "Gonçalves", "Carlos Pedro", "" ] ]
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1401.2125
Paul Tranquilli
Paul Tranquilli and Adrian Sandu
Exponential-Krylov methods for ordinary differential equations
null
Journal of Computational Physics. Volume 278, Pages 31 -- 46, 2014
10.1016/j.jcp.2014.08.013
Computational Science Laboratory CSLTR-01/2014
cs.NA math.NA
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This paper develops a new class of exponential-type integrators where all the matrix exponentiations are performed in a single Krylov space of low dimension. The new family, called Lightly Implicit Krylov-Exponential (LIKE), is well suited for solving large scale systems of ODEs or semi-discrete PDEs. The time discretization and the Krylov space approximation are treated as a single computational process, and the Krylov space properties are an integral part of the new LIKE order condition theory developed herein. Consequently, LIKE methods require a small number of basis vectors determined solely by the temporal order of accuracy. The subspace size is independent of the ODE under consideration, and there is no need to monitor the errors in linear system solutions at each stage. Numerical results illustrate the favorable properties of new family of methods.
[ { "created": "Thu, 9 Jan 2014 19:17:40 GMT", "version": "v1" }, { "created": "Thu, 29 Jan 2015 20:26:34 GMT", "version": "v2" } ]
2015-01-30
[ [ "Tranquilli", "Paul", "" ], [ "Sandu", "Adrian", "" ] ]
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1401.2127
Andr\'e van Renssen
Prosenjit Bose and Andr\'e van Renssen
Spanning Properties of Yao and $\Theta$-Graphs in the Presence of Constraints
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null
null
null
cs.CG
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present improved upper bounds on the spanning ratio of constrained $\theta$-graphs with at least 6 cones and constrained Yao-graphs with 5 or at least 7 cones. Given a set of points in the plane, a Yao-graph partitions the plane around each vertex into $m$ disjoint cones, each having aperture $\theta = 2 \pi/m$, and adds an edge to the closest vertex in each cone. Constrained Yao-graphs have the additional property that no edge properly intersects any of the given line segment constraints. Constrained $\theta$-graphs are similar to constrained Yao-graphs, but use a different method to determine the closest vertex. We present tight bounds on the spanning ratio of a large family of constrained $\theta$-graphs. We show that constrained $\theta$-graphs with $4k + 2$ ($k \geq 1$ and integer) cones have a tight spanning ratio of $1 + 2 \sin(\theta/2)$, where $\theta$ is $2 \pi / (4k + 2)$. We also present improved upper bounds on the spanning ratio of the other families of constrained $\theta$-graphs. These bounds match the current upper bounds in the unconstrained setting. We also show that constrained Yao-graphs with an even number of cones ($m \geq 8$) have spanning ratio at most $1 / ( 1 - 2 \sin (\theta/2) )$ and constrained Yao-graphs with an odd number of cones ($m \geq 5$) have spanning ratio at most $1 / ( 1 - 2 \sin (3\theta/8) )$. As is the case with constrained $\theta$-graphs, these bounds match the current upper bounds in the unconstrained setting, which implies that like in the unconstrained setting using more cones can make the spanning ratio worse.
[ { "created": "Thu, 9 Jan 2014 19:28:09 GMT", "version": "v1" }, { "created": "Thu, 4 Apr 2019 23:27:15 GMT", "version": "v2" } ]
2019-04-08
[ [ "Bose", "Prosenjit", "" ], [ "van Renssen", "André", "" ] ]
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1401.2130
Fangbo Xu
Fangbo Xu, Zhiping Xu and Boris I. Yakobson
Site-Percolation Threshold of Carbon Nanotube Fibers: Fast Inspection of Percolation with Markov Stochastic Theory
21 pages, 6 figures
null
10.1016/j.physa.2014.04.013
null
cond-mat.stat-mech physics.comp-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a site-percolation model based on a modified FCC lattice, as well as an efficient algorithm of inspecting percolation which takes advantage of the Markov stochastic theory, in order to study the percolation threshold of carbon nanotube (CNT) fibers. Our Markov-chain based algorithm carries out the inspection of percolation by performing repeated sparse matrix-vector multiplications, which allows parallelized computation to accelerate the inspection for a given configuration. With this approach, we determine that the site-percolation transition of CNT fibers occurs at p_c =0.1533+-0.0013, and analyze the dependence of the effective percolation threshold (corresponding to 0.5 percolation probability) on the length and the aspect ratio of a CNT fiber on a finite-size-scaling basis. We also discuss the aspect ratio dependence of percolation probability with various values of p (not restricted to p_c).
[ { "created": "Wed, 8 Jan 2014 07:59:38 GMT", "version": "v1" } ]
2015-06-18
[ [ "Xu", "Fangbo", "" ], [ "Xu", "Zhiping", "" ], [ "Yakobson", "Boris I.", "" ] ]
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1401.2134
Alberto Pepe
Alyssa Goodman, Alberto Pepe, Alexander W. Blocker, Christine L. Borgman, Kyle Cranmer, Merc\`e Crosas, Rosanne Di Stefano, Yolanda Gil, Paul Groth, Margaret Hedstrom, David W. Hogg, Vinay Kashyap, Ashish Mahabal, Aneta Siemiginowska, Aleksandra Slavkovic
10 Simple Rules for the Care and Feeding of Scientific Data
Accepted in PLOS Computational Biology. This paper was written collaboratively, on the web, in the open, using Authorea. The living version of this article, which includes sources and history, is available at http://www.authorea.com/3410/
null
10.1371/journal.pcbi.1003542
null
cs.DL astro-ph.IM cs.CY
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This article offers a short guide to the steps scientists can take to ensure that their data and associated analyses continue to be of value and to be recognized. In just the past few years, hundreds of scholarly papers and reports have been written on questions of data sharing, data provenance, research reproducibility, licensing, attribution, privacy, and more, but our goal here is not to review that literature. Instead, we present a short guide intended for researchers who want to know why it is important to "care for and feed" data, with some practical advice on how to do that.
[ { "created": "Thu, 9 Jan 2014 19:38:17 GMT", "version": "v1" } ]
2015-06-18
[ [ "Goodman", "Alyssa", "" ], [ "Pepe", "Alberto", "" ], [ "Blocker", "Alexander W.", "" ], [ "Borgman", "Christine L.", "" ], [ "Cranmer", "Kyle", "" ], [ "Crosas", "Mercè", "" ], [ "Di Stefano", "Rosanne", "" ], [ "Gil", "Yolanda", "" ], [ "Groth", "Paul", "" ], [ "Hedstrom", "Margaret", "" ], [ "Hogg", "David W.", "" ], [ "Kashyap", "Vinay", "" ], [ "Mahabal", "Ashish", "" ], [ "Siemiginowska", "Aneta", "" ], [ "Slavkovic", "Aleksandra", "" ] ]
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1401.2137
Henri Thyrrestrup Dr
Henri Thyrrestrup, Emre Y\"uce, Georgios Ctistis, Julien Claudon, Willem L. Vos, Jean-Michel G\'erard
Differential ultrafast all-optical switching of the resonances of a micropillar cavity
4 pages, 3 figures
Appl. Phys. Lett. 105 , 111115 (2014)
10.1063/1.4896160
null
physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We perform frequency- and time-resolved all-optical switching of a GaAs-AlAs micropillar cavity using an ultrafast pump-probe setup. The switching is achieved by two-photon excitation of free carriers. We track the cavity resonances in time with a high frequency resolution. The pillar modes exhibit simultaneous frequency shifts, albeit with markedly different maximum switching amplitudes and relaxation dynamics. These differences stem from the non-uniformity of the free carrier density in the micropillar, and are well understood by taking into account the spatial distribution of injected free carriers, their spatial diffusion and surface recombination at micropillar sidewalls.
[ { "created": "Thu, 9 Jan 2014 20:00:56 GMT", "version": "v1" }, { "created": "Fri, 10 Jan 2014 11:06:18 GMT", "version": "v2" }, { "created": "Fri, 4 Jul 2014 21:43:56 GMT", "version": "v3" }, { "created": "Wed, 24 Sep 2014 07:35:23 GMT", "version": "v4" } ]
2014-09-25
[ [ "Thyrrestrup", "Henri", "" ], [ "Yüce", "Emre", "" ], [ "Ctistis", "Georgios", "" ], [ "Claudon", "Julien", "" ], [ "Vos", "Willem L.", "" ], [ "Gérard", "Jean-Michel", "" ] ]
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1401.2138
Xi Chen
Zhen-Su She, Xi Chen, Hong-Yue Zou, Yun Bao, Jun Chen, Fazle Hussain
Prediction of temperature distribution in turbulent Rayleigh-Benard convection
5 pages, 3 figures
null
null
null
physics.flu-dyn
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A quantitative theory is developed for the vertical mean temperature profile (MTP) in turbulent Rayleigh-Benard convection (RBC), which explains the recent experimental and numerical observations of a logarithmic law by Ahlers et al.(Phys. Rev. Lett., 2012). A multi-layer model is formulated and quantified, whose predictions agree with DNS and experimental data for the Rayleigh-number (Ra) over seven decades. In particular, a thermal buffer layer follows a 1/7 scaling like the previously postulated mixing zone (Procaccia et al, Phys. Rev. A,1991), and yields a Ra-dependent log law constant. A new parameterization of Nu(Ra) dependence is proposed, based on the present multi-layer quantification of the bulk MTP.
[ { "created": "Thu, 9 Jan 2014 20:04:31 GMT", "version": "v1" } ]
2014-01-10
[ [ "She", "Zhen-Su", "" ], [ "Chen", "Xi", "" ], [ "Zou", "Hong-Yue", "" ], [ "Bao", "Yun", "" ], [ "Chen", "Jun", "" ], [ "Hussain", "Fazle", "" ] ]
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1401.2139
Alejandro Frery
Mart\'in G\'omez Ravetti and Laura C. Carpi and Bruna Amin Gon\c{c}alves and Alejandro C. Frery and Osvaldo A. Rosso
Distinguishing noise from chaos: objective versus subjective criteria using Horizontal Visibility Graph
Submitted to PLOS One
null
10.1371/journal.pone.0108004
null
stat.ML cs.IT math.IT nlin.CD
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
A recently proposed methodology called the Horizontal Visibility Graph (HVG) [Luque {\it et al.}, Phys. Rev. E., 80, 046103 (2009)] that constitutes a geometrical simplification of the well known Visibility Graph algorithm [Lacasa {\it et al.\/}, Proc. Natl. Sci. U.S.A. 105, 4972 (2008)], has been used to study the distinction between deterministic and stochastic components in time series [L. Lacasa and R. Toral, Phys. Rev. E., 82, 036120 (2010)]. Specifically, the authors propose that the node degree distribution of these processes follows an exponential functional of the form $P(\kappa)\sim \exp(-\lambda~\kappa)$, in which $\kappa$ is the node degree and $\lambda$ is a positive parameter able to distinguish between deterministic (chaotic) and stochastic (uncorrelated and correlated) dynamics. In this work, we investigate the characteristics of the node degree distributions constructed by using HVG, for time series corresponding to $28$ chaotic maps and $3$ different stochastic processes. We thoroughly study the methodology proposed by Lacasa and Toral finding several cases for which their hypothesis is not valid. We propose a methodology that uses the HVG together with Information Theory quantifiers. An extensive and careful analysis of the node degree distributions obtained by applying HVG allow us to conclude that the Fisher-Shannon information plane is a remarkable tool able to graphically represent the different nature, deterministic or stochastic, of the systems under study.
[ { "created": "Thu, 9 Jan 2014 20:08:02 GMT", "version": "v1" } ]
2019-04-09
[ [ "Ravetti", "Martín Gómez", "" ], [ "Carpi", "Laura C.", "" ], [ "Gonçalves", "Bruna Amin", "" ], [ "Frery", "Alejandro C.", "" ], [ "Rosso", "Osvaldo A.", "" ] ]
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1401.2141
Saibal Ray
Utpal Mukhopadhyay and Saibal Ray
N.C. Rana: The Life of a `Comet' in the Astrophysical World
24 pages, 18 figures
null
null
null
physics.hist-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Narayan Chandra Rana, a person with extraordinary potential from a remote village of Bengal, India, came into the limelight of the international scientific world through his exceptional talent, zeal and courage. In his very short life-span, he excelled not only into various branches of astrophysics, but also took a leading role in science popularization, text book writing etc. In this paper, life and works of that budding scientist of India have been discussed from multifarious viewpoints.
[ { "created": "Wed, 8 Jan 2014 19:25:57 GMT", "version": "v1" } ]
2014-01-10
[ [ "Mukhopadhyay", "Utpal", "" ], [ "Ray", "Saibal", "" ] ]
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1401.2147
Philippe Lalanne
O. Lozan, M. Perrin, B. Ea-Kim, J.M. Rampnoux, S. Dilhaire, and P. Lalanne
Anomalous light absorption around subwavelength apertures in metal films
5 pages and 4 figures
Phys. Rev. Lett. 112, 193903 (2014)
10.1103/PhysRevLett.112.193903
null
physics.optics
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this work, we study the heat dissipated at metal surfaces by the electromagnetic field scattered by isolated subwavelength apertures in metal screens. In contrast to our common belief that the intensity of waves created by local sources should decrease with the distance from the sources, we reveal that the dissipated heat at the surface remains constant over a broad spatial interval of a few tens of wavelengths. This behavior which occurs for noble metals at near infrared wavelengths is observed with nonintrusive thermoreflectance measurements and is analyzed with an analytical model which underlines the intricate role played by quasi-cylindrical waves in the phenomenon. Additionally, computational results reveal that the absorption plateau is an intrinsic property that occurs for a large variety of topologies, irrespective of aperture shapes.
[ { "created": "Thu, 9 Jan 2014 20:51:19 GMT", "version": "v1" } ]
2019-03-21
[ [ "Lozan", "O.", "" ], [ "Perrin", "M.", "" ], [ "Ea-Kim", "B.", "" ], [ "Rampnoux", "J. M.", "" ], [ "Dilhaire", "S.", "" ], [ "Lalanne", "P.", "" ] ]
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1401.2148
S Habib Mazharimousavi
M. Halilsoy, S. Habib Mazharimousavi and O. Gurtug
Emergent cosmological constant from colliding electromagnetic waves
7 pages one figure, final version accepted for publication in JCAP
JCAP11(2014)010
10.1088/1475-7516/2014/11/010
null
physics.gen-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this study we advocate the view that the cosmological constant is of electromagnetic (em) origin, which can be generated from the collision of em shock waves coupled with gravitational shock waves. The wave profiles that participate in the collision have different amplitudes. It is shown that, circular polarization with equal amplitude waves does not generate cosmological constant. We also prove that the generation of the cosmological constant is related to the linear polarization. The addition of cross polarization generates no cosmological constant. Depending on the value of the wave amplitudes, the generated cosmological constant can be positive or negative. We show additionally that, the collision of nonlinear em waves in a particular class of Born-Infeld theory also yields a cosmological constant.
[ { "created": "Mon, 6 Jan 2014 09:41:07 GMT", "version": "v1" }, { "created": "Mon, 13 Jan 2014 13:52:29 GMT", "version": "v2" }, { "created": "Wed, 15 Oct 2014 15:12:47 GMT", "version": "v3" } ]
2014-11-12
[ [ "Halilsoy", "M.", "" ], [ "Mazharimousavi", "S. Habib", "" ], [ "Gurtug", "O.", "" ] ]
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1401.2153
V Karthikeyan VKK
V.Karthikeyan, V.J.Vijayalakshmi and P.Jeyakumar
Ontology - Based Dynamic Business Process Customization
This paper has been withdrawn by the author due to a crucial sign error
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cs.AI
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The interaction between business models is used in consumer centric manner instead of using a producer centric approach for customizing the business process in cloud environment. The knowledge based human semantic web is used for customizing the business process It introduces the Human Semantic Web as a conceptual interface, providing human-understandable semantics on top of the ordinary Semantic Web, which provides machine-readable semantics based on RDF in this mismatching is a major problem. To overcome this following technique automatic customization detection is an automated process of detecting possible elements or variables of a business process that needto be especially treated in order to suit the requirement of the other process. To the business processto be customized as the primary business process and those that it collaborates with as secondary business process or SBP Automatic customization enactment is an automated process of taking actions to perform the customization on the PBP according to the detected customization spots and the automatic reasoning on the customization conceptualization knowledge framework. The process of customizing businessprocesses by composite the web pages by using web service.
[ { "created": "Thu, 9 Jan 2014 08:23:27 GMT", "version": "v1" }, { "created": "Wed, 22 Jan 2014 08:21:00 GMT", "version": "v2" }, { "created": "Thu, 23 Jan 2014 03:39:52 GMT", "version": "v3" } ]
2014-01-24
[ [ "Karthikeyan", "V.", "" ], [ "Vijayalakshmi", "V. J.", "" ], [ "Jeyakumar", "P.", "" ] ]
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1401.2155
Damien Jougnot
D. Jougnot, J. G. Rubino, M. Rosas Carbajal, N. Linde and K. Holliger
Seismoelectric effects due to mesoscopic heterogeneities
14 pages, 3 figures
Geophys. Res. Lett. 40 (2013) 2033-2037
10.1002/grl.50472
null
physics.geo-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
While the seismic effects of wave-induced fluid flow due to mesoscopic heterogeneities have been studied for several decades, the role played by these types of heterogeneities on seismoelectric phenomena is largely unexplored. To address this issue, we have developed a novel methodological framework which allows for the coupling of wave-induced fluid flow, as inferred through numerical oscillatory compressibility tests, with the pertinent seismoelectric conversion mechanisms. Simulating the corresponding response of a water-saturated sandstone sample containing mesoscopic fractures, we demonstrate for the first time that these kinds of heterogeneities can produce measurable seismoelectric signals under typical laboratory conditions. Given that this phenomenon is sensitive to key hydraulic and mechanical properties, we expect that the results of this pilot study will stimulate further exploration on this topic in several domains of the Earth, environmental, and engineering sciences.
[ { "created": "Fri, 10 Jan 2014 10:05:44 GMT", "version": "v1" } ]
2014-01-13
[ [ "Jougnot", "D.", "" ], [ "Rubino", "J. G.", "" ], [ "Carbajal", "M. Rosas", "" ], [ "Linde", "N.", "" ], [ "Holliger", "K.", "" ] ]
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1401.2156
Victor Argonov
Victor Argonov
The effect of Landau-Zener tunnelings on the nonlinear dynamics of cold atoms in a modulated laser field
5 pages, 3 figures
null
null
null
physics.atom-ph quant-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study the motion of a cold atom in a frequency-modulated standing laser wave. If the detuning between the atomic electronic transition and the field is large, the atom moves in a modulated optical potential demonstrating known classical nonlinear effects such as chaos and nonlinear resonances. If the atom-field detuning is small, then two optical potentials emerge in the system, and the atom performs Landau-Zener (LZ) tunnelings between them. It is a radically non-classical behavior. However, we show that classical nonlinear structures in system's phase space (KAM-tori and chaotic layers) survive. Quantum effect of LZ tunnelings only induces small random jumps of trajectories between these structures (dynamical tunneling).
[ { "created": "Thu, 9 Jan 2014 23:46:24 GMT", "version": "v1" } ]
2014-01-13
[ [ "Argonov", "Victor", "" ] ]
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