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21,019,613 | {
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} | The local and systemic release of thromboxane A2, prostaglandin I2, leukotriene B4 (LTB4), tumor necrosis factor alpha (TNF-alpha), interleukin-1 beta (IL-1 beta), interleukin-6 (IL-6), and interleukin-8 (IL-8) were studied before and after operation in 29 patients with acute and 22 with chronic posttraumatic osteomyelitis. Twenty patients without osteomyelitis, who underwent operations for fractures of the lower extremities, served as controls. Blood and tissue samples from the osteomyelitic and control groups were collected under defined conditions and mediators were determined by radioimmunoassay (thromboxane B2, 6-keto-prostaglandin F1 alpha, LTB4) or by enzyme-linked immunosorbent assay (TNF-alpha, IL-1 beta, and IL-8). In addition, common parameters (leukocyte count, C-reactive protein, temperature) were measured. The best correlation with acute disease activity was given by TNF-alpha, IL-6, IL-8, and LTB4. Plasma levels of these mediators in acute osteomyelitis were significantly increased compared to chronic osteomyelitis and to controls, respectively. Tissue samples from osteomyelitic focus showed significantly increased levels for IL-8, IL-6, TNF-alpha, IL-1 beta, and LTB4 in acute osteomyelitis, whereas the values for TxB2 and 6-keto-prostaglandin F1 alpha were only slightly increased compared to the chronic osteomyelitis group. This study describes the local and systemic liberation of various mediators in acute and chronic posttraumatic osteomyelitis in detail for the first time and provides data for pre- and postoperative monitoring of disease activity and demonstrates new pathogenetic and therapeutic aspects of bone modulation in osteomyelitis. | 2022-12-21T17:23:11.967Z |
220,482,544 | {
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"DOI": "10.1155/2020/2707635",
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"url": "https://downloads.hindawi.com/journals/mi/2020/2707635.pdf"
} | Receptor internalization and degradation (RID), is a transmembrane protein coded within the E3 region expression cassette of adenoviruses. RID downregulates the cell surface expression of epidermal growth factor receptor (EGFR), tumor necrosis factor receptor (TNFR), and apoptosis antigen 1 (FAS), causing a reduction of the effects of their respective ligands. In addition, RID inhibits apoptosis by decreasing the secretion of TNF-related apoptosis-inducing ligand (TRAIL) by normal tissue cells. In this article, we report that RID inhibited chemokine expression in human breast cancer cell line MDA-MB-231 but showed no effect in cell line MCF7. These dissimilar results may be due to the different molecular and functional properties of both cell lines. Therefore, it is necessary to replicate this study in other breast cancer cell models. | 2022-02-03T06:43:13.092Z |
143,269,314 | {
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} | ABSTRACT The authors used self-regulated learning (SRL) as a lens for examining teachers' conceptions of assessment and their classroom assessment practices. Fifteen upper-elementary and middle school teachers participated in semistructured interviews designed to uncover their beliefs about the forms and functions of classroom assessment. Observational data were collected in the teachers' classrooms. The findings show that while teachers have complex understandings of classroom assessment, their assessment environments are not optimal for supporting students' development of SRL habits. Teachers tend to see themselves as the initiators and controllers of assessment opportunities, prioritize attainment of content information, and value written assessment products over practices that generate intangible data. The authors describe these trends as consequences of the competing audiences teachers have to satisfy with their assessment practices. | 2023-01-01T23:33:51.730Z |
213,605,378 | {
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"DOI": "10.21608/jsrep.2019.50313",
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} | هدف البحث إلى التعرف على دور النشاط العلمی والنشاط الکشفی والنشاط الثقافی فی تنمیة التفکیر الاستدلالی لدى طلاب المرحلة الثانویة بمحافظة القویعیة، والکشف عن أبرز المعوقات التی تحد من دور الأنشطة الطلابیة (النشاط العلمی، والکشفی، والثقافی) فی تنمیة التفکیر الاستدلالی لدى طلاب المرحلة الثانویة بمحافظة القویعیة، کما هدف إلى التوصل إلى أفضل السبل التی تسعى إلى تطویر دور الأنشطة الطلابیة (النشاط العلمی، والکشفی، والثقافی) فی تنمیة التفکیر الاستدلالی لدى طلاب المرحلة الثانویة بمحافظة القویعیة وذلک من وجهة نظر رواد الأنشطة الطلابیة بالمدارس الثانویة الحکومیة النهاریة بمحافظة القویعیة، استخدم الباحث المنهج الوصفی المسحی، وشملت عینة البحث (157) رائدا من رواد الأنشطة الطلابیة بمدارس المرحلة الثانویة الحکومیة -النهاریة- فی إدارة التعلیم بمحافظة القویعیة خلال الفصل الدراسی الأول من عام 1439-1440هـ، تم اختیارهم بأسلوب الحصر الشامل، وقد استجاب منهم (149) رائد نشاط، بما نسبته 95% من مجتمع البحث الأصلی، واستخدمت الاستبانة أداة لجمع البیانات، ومن أهم نتائج البحث: تقدیرات مفردات مجتمع البحث لدور الأنشطة الطلابیة (النشاط العلمی، والکشفی، والثقافی) فی تنمیة التفکیر الاستدلالی لدى طلاب المرحلة الثانویة بمحافظة القویعیة جاءت بدرجة (مرتفعة جدا)، تقدیرات مفردات مجتمع البحث للمعوقات التی تحد من دور الأنشطة الطلابیة (النشاط العلمی، والکشفی، والثقافی) فی تنمیة التفکیر الاستدلالی لدى طلاب المرحلة الثانویة بمحافظة القویعیة جاءت بدرجة (مرتفعة جدا)، مفردات مجتمع البحثیوافقون بدرجة مرتفعة جدا على سبل تطویر دور الأنشطة الطلابیة (النشاط العلمی، والکشفی، والثقافی) فی تنمیة التفکیر الاستدلالی لدى طلاب المرحلة الثانویة بمحافظة القویعیة، أهم سبل تطویر دور الأنشطة الطلابیة (النشاط العلمی، والکشفی، والثقافی) فی تنمیة التفکیر الاستدلالی لدى طلاب المرحلة الثانویة بمحافظة القویعیة من وجهة نظر رواد الأنشطة الطلابیة فی: تحفیز مشرفی النشاط الطلابی لرواد النشاط الطلابی فی تنفیذ برامج الأنشطة التی تسهم فی تنمیة التفکیر الاستدلالی، توفیر الأماکن المخصصة لمزاولة الأنشطة الطلابیة فی المدرسة، إعداد البرامج والخطط للأنشطة الطلابیة التی تدعم تنمیة التفکیر الاستدلالی. Abstract Research Objectives: this research aimed to identify the role of scientific activity, scouting activity and cultural activity in the development of deductive thinking among secondary school students in Quweia governorate. The aim was also to uncover the main obstacles that limit the role of student activities (scientific activity, scouting and cultural activities) for the secondary school students in Quweia governorate, the research also aimed to find the best ways to develop the role of student activities (scientific activity, scouting and cultural) in the development of deductive thinking among secondary school students in Quweia governorate from the point of view of the pioneers of student activities in the governmental secondary schools in the governorate of Quwaia Research Methodology: The researcher used the descriptive method. The sample included (157) pioneers of student activities in the secondary schools in Qawaiya governorate during the first semester of 1439-1440. They were selected in a comprehensive inventory method, of them 149 responded with 95% of the original research community. Data collecting tools: The questionnaire tool was used to collect data. Research Results: The estimates of the research community members for the role of student activities (scientific activity, scouting and cultural) in the development of deductive thinking among secondary school students in Qawaiya governorate came to a very high level. The main roles of student activities (scientific activity, scouting and cultural activities) students in the secondary school in Quwaia governorate from the point of view of the pioneers of student activities in: student activities develop students mental skills, developing programs summarize books in the school library to the student the skill of conclusion, scouting activities contribute to the development of mental skills to students. The estimates of the research community members for the constraints that limit the role of student activities (scientific activity, scouting and cultural) in the development of deductive thinking among secondary school students in Qawaiya governorate came at a very high level. The main obstacles that limit the role of student activities (scientific activity, And cultural) in the development of deductive thinking among secondary school students Quwaia governorate from the point of view of the pioneers of student activities in: lack of interest in activities that develop the skill of deductive, neglecting the opportunity to students to determine their desire to engage in a particular activity and not seek to develop it. The estimates of the research community members agrees with a very high degree on how to develop the role of student activities (scientific activity, scouting and cultural activities) in the development of deductive thinking among secondary school students in Qawaiyia governorate, the most important ways to develop the role of student activities (scientific, In the case of students in the secondary school in Quweia governorate, from the point of view of the pioneers of student activities in: motivating the supervisors of the student activity for the pioneers of student activity in the implementation of programs of activities that contribute to the development of deductive thinking, the provision of places for the activities of students in the school, programs and plans for student activities that support the development of deductive thinking. | 2022-02-08T02:42:34.486Z |
245,586,941 | {
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"DOI": "10.35220/2078-8916-2021-42-4.2",
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"url": "https://visnyk.od.ua/index.php/mainjournal/article/download/205/186"
} | Статтю присвячено дослідженню кореляційної залежності між основними клінічними показниками в процесі лікування захворювань пародонта в пацієнтів різних екологічних регіонів Прикарпаття. Метою дослідження є встановлення кореляційної залежності між клінічними показниками, що спостерігаються при захворюваннях тканин пародонта, та порівняльний аналіз отриманих результатів у пацієнтів різних екологічних регіонів Прикарпаття в процесі лікування захворювань тканин пародонта. Методи дослідження. Обстежено 83 хворих на генералізований пародонтит, що проживають у різних екологічних умовах. Проведено кореляційний аналіз між клінічними показниками при генералізованому пародонтиті. Результати. Установлено достовірні (р˂0,05) кореляційні зв’язки різної сили та характеру між індексом кровоточивості та індексом Федорової-Володкіної, індексом Рассела та глибиною пародонтальних кишень, індексом РМА та індексом кровоточивості, індексом гігієни та індексом РМА, індексом Рассела та індексом кровоточивості, глибиною пародонтальних кишень та індексом кровоточивості, індексом Рассела та індексом РМА, індексом Федорової-Володкіної та пародонтальним індексом Рассела, індексом гігієни та глибиною пародонтальних кишень, індексом РМА та глибиною пародонтальних кишень. Наукова новизна. Установлено кореляційну залежність між основними клінічними показниками, що спостерігаються при захворюваннях тканин пародонта, та здійснено порівняльний аналіз отриманих результатів у пацієнтів різних екологічних регіонів Прикарпаття в процесі лікування захворювань тканин пародонта. Висновки. Доведена кореляційна залежність між основними клінічними показниками у пацієнтів із генералізованим пародонтитом та можливість використання кореляційного методу статистичного аналізу під час обробки даних клінічних показників у пацієнтів із захворюваннями тканин пародонта. | 2022-04-01T01:44:45.547Z |
109,282,767 | {
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"DOI": "10.7836/KSES.2012.32.2.105",
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} | The conversion of solar energy into acoustic waves is experimentally studied. Measurements were made on the Sound Pressure Level (SPL), frequency, onset time and the temperature gradient across the stack. A pyrex resonance tube is used with a honey-comb structure ceramic stack along with Ni-Cr and Cu wires. An AL1 acoustical analyzer was used to measure the SPL and frequency of acoustic waves whereas K-type thermocouples were hired to estimate temperature gradients. For a resonance tube of 100 mm, no acoustic waves were generated with a power input of 25W. By increasing its length to 200 mm, however, maximum SPLs of 96.4 dB, 106.3 dB and 112.8 dB were detected for the tubes of 10mm,20mm and 30mm in IDs and their respective stack positions of 70mm, 60mm and 50mm from the closed end. | 2022-09-03T18:45:20.727Z |
12,316,714 | {
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"DOI": "10.1002/wsbm.124",
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} | As an inherited epigenetic marker occurring mainly on cytosines at CpG dinucleotides, DNA methylation occurs across many higher eukaryotic organisms. Looking at methylation patterns genome‐wide classifies cell types uniquely and in several cases discriminates between healthy and cancerous cell types. DNA methylation can occur allele‐specifically, which allows the cellular regulatory machinery to recognize each allele separately. Although only a small number of allele specifically methylated (ASM) regions are known, genome‐wide experiments show that ASM is prevalent throughout the human genome. These DNA methylation patterns can be modified via DNA demethylation, which is important for induced pluripotent stem reprogramming and primordial germ cells. Recent evidence shows that the protein activation‐induced cytidine deaminase plays a critical role in these demethylation events. Many transcription factors mediate DNA methylation patterns. Some transcription factors bind specifically to methylated or unmethylated sequences and other transcription factors protect genomic regions (e.g., promoter regions) from nearby DNA methylation encroachment. Possibly acting as another epigenetic regulatory layer, methylated cytosines are also converted to 5‐hydroxyethylcyotines, which is a new modification type whose biological significance has yet been defined. WIREs Syst Biol Med 2011 3 281–298 DOI: 10.1002/wsbm.124 | 2022-09-13T16:39:14.113Z |
245,474,091 | {
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"DOI": "10.31548/law2021.04.008",
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"url": "http://journals.nubip.edu.ua/index.php/Pravo/article/download/15417/14161"
} | In the article considered guarantees of the right on access to ecological information fixed in international legal documents. Also made a research on state of implementation such international instruments in national Ukrainian legislation, separate legal instruments of realization the right to get ecological information. Made examples of successful defence of the broken right on access to ecological information. In order to exercise the right to information, it is important not only to have the norms enshrined in the legislation, but also the system of guarantees and opportunities for their implementation, which should be provided by public authorities. International legal documents establish only general approaches to the protection of rights, and their further development and consolidation is undoubtedly entrusted to national authorities. The analysis of the current national legislation allows to state that in general the international legal norms have found the reflection in national regulatory legal acts. However, over time, approaches to understanding environmental information, expanding its list, the subjects who have the right to receive it, so work in this direction should continue in order to increase the possibility of exercising the right of access to such information. Keywords: ecolaw, right on access to ecological information, guarantees of right on access to ecological information, international guarantees of right on access to ecological information | 2022-01-28T01:52:21.954Z |
27,012,477 | {
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"DOI": "10.4172/2169-0022.1000323",
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"url": "https://doi.org/10.4172/2169-0022.1000323"
} | Among the very few efforts for the preparation of stable pillared graphene nanostructures, there is no report of tin porphyrin intercalated between TiO2-graphene (TG) nanosheets. In this study, a nanostructure material of pillared graphene made of tin porphyrin functionalized graphene-TiO2 composite (TG) was successfully synthesized. The prepared compound showed high activity in the photodegradation reaction under irradiation of visible light. Photocatalytic results showed that the composite of graphene-TiO2 containing 3% graphene had the highest photoactivity. The photoactivity of TG (3%) was about 1.5 times higher than that of the pure TiO2. Besides, tin porphyrin-pillared TG composite (TGSP) material exhibited an excellent visible light photocatalytic performance in degradation of methyl orange dye. This compound could destruct 100% of methyl orange dye in 180 min. Such pillared carbon nanostructure exhibited unique photoactivity due to the synergistic effect between the graphene sheets and the SnTCPP pillars. It is found that the highly efficient light-harvesting structure of the SnTCPP pillared TG composite can be attributed to densely embedded porphyrin chromophores with high visible absorptivity within the framework. The investigation of photocatalytic mechanism determined that hydroxyl radical is a main species in photodegradation process of methyl orange over TGSP compound. | 2022-01-27T06:48:14.153Z |
192,905,765 | {
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"DOI": "10.4000/REMI.7425",
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} | Cet article etudie certaines facons dont les populations construisent l’autochtonie. A partir d’une etude ethnographique menee entre 2009 et 2013 dans un village du Berry, l’auteur met en lumiere un contexte original de construction de l’autochtonie ou les relations sociales font intervenir des Portugais, installes dans la region dans les annees 1960, des « vieilles familles » du village et des habitants plus recemment etablis. Il montre ainsi comment chacun de ces acteurs fait valoir, par differents procedes, une presence legitime et un sentiment d’ancrage au village a travers leur investissement dans un pelerinage local. | 2022-02-08T08:39:23.916Z |
86,370,287 | {
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"DOI": "10.5179/BENTHOS1996.52.1_35",
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} | The micro-habitat, size composition, and movement pattern of the muricid snail Muricodrupa fusca were investigated. In contrast to two other muricids, Morula musiva and Thais clavigera, this species exclusively inhabits tidepools and its shell size is small. The adaptive implications of its small size are discussed in relation to the environmental conditions of its main habitat. Small size presents some advantages for living in tidepools with limited food resources. The major disadvantages of a small size, namely low tolerance to desiccation and increased vulnerability to predators, appear to be avoided by inhabiting tidepools. Mu. fusca moved landward in September and seaward in February, and reproduction is proposed as the reason for this migration. | 2022-02-10T22:28:01.051Z |
19,310,992 | {
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"DOI": "10.1111/j.1399-0004.1993.tb04456.x",
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} | In its classical form, congenital adrenal hyperplasia due to 11 β‐hydroxylase deficiency is characterized by hypertension and abnormal sexual development. Suppression of ACTH secretion by means of administering glucocorticoids fulfills the therapeutic goal of reducing blood pressure and decreasing androgen production. The present report describes the case of a patient suffering from congenital adrenal hyperplasia due to 11β‐hydroxylase deficiency who developed an acute adrenal crisis, unprovoked by stress, following interruption of glucocorticoid replacement therapy. It is suggested that patients on a suppressive dose of glucocorticoids for adrenal hyperplasia are at increased risk for acute adrenal insufficiency if therapy is interrupted, and that deoxycorticosterone (DOC) in the absence of a glucocorticoid is insufficient to prevent manifestations of adrenal crisis. | 2022-08-28T03:53:02.167Z |
248,872,267 | {
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"DOI": "10.22146/jmpf.69974",
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"url": "https://jurnal.ugm.ac.id/jmpf/article/download/69974/pdf"
} | End-stage renal disease (ESRD) patients undergoing hemodialysis (HD) could experience several problems, then reducing their quality of life (QOL). Medication adherence (MA), including HD is very important to improve the patient's QOL. This study aimed to analyze the correlation between MA and QOL and its related factors in ESRD patients. This cross-sectional study was conducted at a Public Hospital, Buleleng, Bali in September 2020. A sample of 89 people was obtained by the purposive sampling technique. The inclusion criteria for this study were ESRD patients aged ≥18 years, undergoing HD, filling out the questionnaire completely, and being able to communicate well. Data were collected using ERSD-AQ and EQ-5D-5L questionnaire, also medication records. Data analysis were performed by Perason’s rank correlation, Spearman’s rho, Kendall’s tau-b/c, Mann-Whitney U, or Kruskal Wallis test (CI 95%). Findings showed that mostly respondents were <60 years old (66.3%), male (71.9%), less than high school educational (68.5%), not working (69.7%), lower income (55.1%), having an ESRD duration of <3 years (67.4%), taking ≤6 item medicines (96.6%), having a mean (±SD) QOL-based on a utility value of 0.779±0.172 and a visual analog scale (VAS) of 60.79±18.04. Hence, there was no significant correlation between MA and QOL, as well as patient characteristics to MA (p>0.05).). Otherwise, patients aged <60 years, high levels of education and income, as well as the number of drug items received, tend to have a better QOL (p<0.05). | 2022-09-02T05:16:09.932Z |
7,795,108 | {
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"DOI": "10.1111/j.1365-2141.1976.tb03610.x",
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} | Summary. Human blood lymphocytes can be separated into two populations according to the presence of surface complement receptors. Lymphocytes containing complement receptors (CR+) were found to have a high rate of RNA synthesis or turnover accompanied by increased protein synthesis. Lymphocytes not containing complement receptors (CR—) while maintaining a low profile in RNA synthesis, had a 10–12‐fold greater activity in adenosine deaminase enzyme which is believed to be related to lymphocyte‐immune responses and cell‐mediated immunity. These two biochemical characteristics can be useful tools for future studies in lymphocyte functions. By using these two biochemical markers, we found that CLL lymphocytes were predominantly of the CR+ type, had high active RNA synthesis, and very low adenosine deaminase level. Lymphocytes from two patients with X‐linked agammaglobulinaemia showed a picture opposite to that of CLL. | 2022-12-09T19:45:02.758Z |
6,869,645 | {
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"DOI": "10.1109/CSCWD.2010.5471902",
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} | Business process simulation plays an important role for enterprise business process re-engineering. This paper proposes a new algorithm to dynamically select a critical path with multiple constraints for enterprise process cooperative scheduling within cooperative business simulation systems. The proposed algorithm is based on Dynamic Programming and Analytic Hierarchy Process (AHP), and has been validated through a prototype implementation with case studies. | 2022-12-13T12:52:43.270Z |
239,106,405 | {
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"DOI": "10.31289/pelitamasyarakat.v3i1.5801",
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"status": "GOLD",
"url": "https://doi.org/10.31289/pelitamasyarakat.v3i1.5801"
} | Pandemi Corona Virues Disease 2019 (Covid-19) berdampak besar pada semua sector, kesehatan dan ekonomi merupakan sector yang sangat terdampak. Pada tingkat desa terdapat kelompok masyarakat yang sudah sejak lama berkembang yaitu Posyandu. Permasalahan yang terjadi pada kebanyak Posyandu termasuk pada mitra adalah rendahnya kinerja kader Posyandu karena ekonomi keluarga yang lemah sehingga Posyandu tidak menjadi prioritas. Selain itu Posyandu juga kerap mengalami kekurangan biaya untuk pelaksanaan Imunisasi bulanan. Kader Posyandu yang aktif akan dilatih untuk memiliki satu jenis usaha yang dikelola secara bersama yang keuntungannya selain untuk kader juga digunakan untuk membantu pembiayaan pelaksanaan Posyandu setiap bulannya. Wirausaha pada Posyandu diharapkan dapat menyelesaikan masalah ekonomi dan kesehatan tingkat keluarga di setiap desa. Kegiatan yang dilakukan untuk mencapai target antara lain, penentuan jenis produk, penyerahan alat produksi, pelatihan produksi, pendampingan merek dan logo, pendampingan pembuatan label dan kemasan, pendampingan produksi, pendampingan penentuan pasar, pelatihan dan pendampingan pencatatan keuangan, pendampingan pengurusan IUMK dan NIB, pendampingan pembuatan konten promosi. Hasil Kegiatan ini antara lain, adanya pendapatan yang dimiliki oleh kader Posyandu, dimana sebelumnya kader tidak punya pendapatan, kegiatan ini juga berhasil menghasilkan peningkatan pengetahuan kader dalam mengelola bisnis, kader juga memiliki ketrampilan dalam membuat produk serta melakukan pencatatan keuangan usaha, kegiatan ini sudah mampu memberikan pendapatan rutin bulanan kepada kader Posyandu, dimana kondisi sebelumnya kader Posyandu tidak punya penghasilan tambahan. Posyandu mendapatkan dana tambahan untuk Pembelian PMT & Kader mendapatkan pendapatan tambahan bulanan | 2022-01-24T17:42:18.573Z |
239,429,841 | {
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"url": "http://theprofesional.com/index.php/tpmj/article/download/1720/1411"
} | Introduction: The hypertensive Disorders of pregnancy are major contributors tomaternal and perinatal morbidity and mortality. The aim of hypertensive therapy is to preventcomplications associated with hypertensive disorders of pregnancy. Objective: To compareefficacy of methyldopa and labetalol in management of pregnancy induced hypertension.Study Design: Randomized control trial. Setting: Punjab medical college and affiliatedhospitals Faisalabad. Methods: Patient were be randomly assigned to either group A or Groupby lottery method. Each group included 157 patients. In group A: labetalol was started at 100mg three or four times a day and increased up to 1200 mg a day in divided doses. In group B:methyldopa was started at 250mg per day 3 to 4 divided doses and increased up to 500 mg in 3to 4 divided doses. Blood pressure was recorded by sphygmomanometer. Blood pressure wasrecorded after 48 hours and then weekly till term on outpatient basis. Results: The treatmentof methyldopa in group I was proved to successful in lowering the mean blood pressure andmaintaining mean blood pressure within normal limits in 142 of 155 patients. It can be said itwas successful in 91.61% cases. 8.39% cases progressed to severe hypertension or eclampsiabecause methyldopa was unsuccessful to prevent progress of disease. Conclusion: It isconcluded that antihypertensive therapy such as methyldopa and labetalol are successful inlowering blood pressure in patient with pregnancy induced hypertension. | 2022-06-14T10:47:27.773Z |
71,819,178 | {
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"DOI": "10.5750/IJPCM.V1I2.66",
"MAG": "2040887199",
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} | Permission to archive the publisher pdf of this article was granted by the publisher in February 2012 | 2022-09-07T04:06:14.252Z |
108,925,140 | {
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"DOI": "10.1080/16487788.2004.9635885",
"MAG": "1608299546",
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} | Abstract This paper presents the stress analysis of a second stage turbine disc, subjected to spin rig test. To solve the problem, the finite element analysis of complex geometrical model of the disc/blade segment with much physical nonlinearity such as contact and plasticity was carried out. The adequate mechanical and thermal conditions for the spin rig test were next defined to determine the stress state of the disc/blade segment. High stress zones were found at the regions of the turbine where the first fatigue cracks are expected to appear. The results of this study are useful during the laboratory spin rig test of turbine. The zones of maximum stress indicated in this analysis will be in detail inspected under laboratory crack initiation and crack growth tests of turbine. For better understanding the phenomena occurring in spin rig test of turbine, the test details were also described. | 2022-09-14T20:43:12.603Z |
137,133,288 | {
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"DOI": "10.1115/IMECE2005-82905",
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} | This paper describes the fabrication of microchannels by direct-write assembly and their integration into CMOS circuit technologies. A robotic apparatus was used to deposit a fugitive ink filament on glass and CMOS chip substrates. An epoxy and a nanocomposite matrix were both used to enclose the ink which was subsequently removed under heat and pressure in order to form a microchannel. Here, we demonstrate the fabrication of a microchannel by direct-write assembly on top of a CMOS chip for potential laboratory-on-chip applications such as bioparticle detection and manipulation.© 2005 ASME | 2022-12-03T20:08:05.773Z |
170,705,605 | {
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"DOI": "10.7788/saeculum.2010.60.2.179",
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"status": "GREEN",
"url": "https://boris.unibe.ch/12938/1/Sp%C3%A4th-Wirbelauer_2010_Perspektiven.pdf"
} | Die methodisch gesicherte Beschreibung antiker Gesellschaften ist kein neues Thema der Geschichtswissenschaft. Doch scheint es mehr denn je geboten, die liebgewonnenen, ja vertrauten Darstellungen zu hinterfragen, zumal diese inzwischen eine ganze Forschergeneration geprägt haben. Dabei waren die klassischen deutschsprachigen Unternehmungen der 1970er Jahre es sei hier nur an Friedrich Vittinghoffs Handbuch der Europäischen Sozialund Wirtschaftsgeschichte sowie an Gézy Alföldys Arbeiten erinnert keineswegs so unbestritten akzeptiert worden, wie es heute im zeitlichen Abstand scheinen mag. Die Debatte betraf insbesondere die Analyseinstrumente und wurde in den 1980er Jahren bisweilen in recht pointierter Form geführt, nicht zuletzt im SAECULUM. Neben diesen Auseinandersetzungen traten seit den 1980er Jahren bis dahin unbeachtet gebliebene Fragestellungen und Ansätze immer mehr in den Vordergrund: Die Historische Anthropologie in ganz unterschiedlichen Ausprägungen oder eine von Grund auf neu konzipierte Religionsgeschichte ließen die klassischen Diskussionen der sozialgeschichtlichen Forschung in den Hintergrund treten. So kommt es, daß noch heute die meisten Studentinnen und Studenten, die sich eine Vorstellung von Struktur und Entwicklung der römischen Gesellschaft verschaffen wollen, mit Alföldys Synthese arbeiten, obgleich die grundlegend veränderten Sichtweisen der letzten 35 Jahre dort nicht abgebildet sein können. Der Weg zu einer qualitativ neuen Sicht auf unseren Gegenstand ist freilich | 2022-12-16T15:37:51.787Z |
97,926,136 | {
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"DOI": "10.1002/JRS.4467",
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} | Fourier transform microwave spectrum of cyclopentylamine, c–C5H9NH2 has been recorded, and seven transitions have been assigned for the most abundant conformer, and the rotational constants have been determined: A = 4909.46(5), B = 3599.01(4), and C = 2932.94(4). From the determined microwave rotational constants and ab initio MP2(full)/6-311 + G(d,p) predicted structural values, adjusted r0 parameters are reported with distances (A): rCα–Cβ = 1.529(3), rCβ–Cγ = 1.544(3), rCγ–Cγ = 1.550(3), rCα–N = 1.470(3), and angles (°) ∠CCN = 108.7(5), ∠CβCαCβ = 101.4(5), and τCβCαCβ′Cγ′ = 42.0(5). The infrared spectra (4000–220 cm−1) of the gas have been recorded. Additionally, the variable temperature (−60 to −100 °C) Raman spectra of the sample dissolved in liquefied xenon was recorded from (3800–50 cm−1). The four possible conformers have been identified, and their relative stabilities obtained with enthalpy difference relative to t-Ax of 211 ± 21 cm−1 for t-Eq ≥ 227 ± 22 cm−1 for g-Eq ≥ 255 ± 25 cm−1 for g-Ax. The percentage of the four conformers is estimated to be 53% for the t-Ax, 11 ± 1% for t-Eq, 20 ± 2% for g-Ax and 16 ± 2% for g-Eq at ambient temperature. The conformational stabilities have been predicted from ab initio calculations by utilizing several different basis sets up to aug-cc-pVTZ from both MP2(full) and density functional theory calculations by the B3LYP method. Vibrational assignments have been provided for the observed bands for all four conformers, which are predicted by MP2(full)/6-31G(d) ab initio calculations to predict harmonic force constants, wavenumbers, infrared intensities, Raman activities, and depolarization ratios for all of the conformers. The results are discussed and compared to the corresponding properties of some related molecules. Copyright © 2014 John Wiley & Sons, Ltd. | 2022-12-18T11:48:42.823Z |
31,276,053 | {
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"DOI": "10.1212/WNL.55.10.1485",
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} | Background: Several studies suggest that neurocysticercosis is the main cause of symptomatic epilepsy in developing countries. In such areas, calcified cysticercotic lesions (CCL) are frequently found in patients with complex partial seizures associated with hippocampal sclerosis (HS). The authors studied whether there are clinical and pathologic differences between HS patients with and without CCL. Methods: The authors determined the clinical and pathologic findings of 30 patients with HS and compared them with 32 patients with HS + CCL. Hippocampi from both groups were measured for fascia dentata Timm staining and cell density in hippocampal subfields. Results: In the HS + CCL group, single or multiple CCL were found in all lobes with no lobar predominance. An initial precipitating event occurred in 83.3% of HS and in 62.5% of HS + CCL. First complex partial seizure occurred at 10.1 years in HS and at 11.9 years in HS + CCL. No significant differences were found for fascia dentata Timm staining and hippocampal cell densities. Good postsurgery outcome (Engel I classification) did not differ between groups, with this result occurring in 76.6% of patients with HS and 81.2% of patients with HS + CCL. Conclusions: The presence of CCL does not influence the clinical and pathologic profile of patients with hippocampal atrophy. Clinical histories and postsurgical outcomes were similar to those of patients with classic HS, suggesting that the CCL is probably, in this set of patients, a coincidental pathology and does not have a role in epileptogenesis.–1491 | 2022-12-17T23:56:01.824Z |
135,870,820 | {
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"DOI": "10.1117/12.2033534",
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} | The physical limit for the maximum extractable power of Tm-doped silica fiber lasers in resonantly-pumped configuration is analyzed. The effect of thermal fracture, thermal lens, melting of the core, optical damage, finite pump brightness and the nonlinear effects (stimulated Brillouin scattering or stimulated Raman scattering) are taken into consideration. According to the numerical simulation, a maximum extractable power of 56.6 kW and 2.11 kW could be achieved by theTm-doped fiber sources in resonantly-pumped configuration for the broad bandwidth and single-frequency case, respectively. Strictly single-mode of these cases are also taken into consideration, and the maximum extractable powers are 12 kW and 1.25 kW. The physical limit mechanism derived by this method proves that the Tm-doped fiber sources in resonantly-pumped regime has a significant advantage over that in diode directly-pumped regime, thus having practical significance for increasing the output power. | 2022-09-11T12:48:08.880Z |
128,477,783 | {
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"DOI": "10.1029/2003GL017177",
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} | This study introduces a new snowfall detection algorithm over land using AMSU measurements. The algorithm utilizes a combination of channels in the microwave window, water vapor and oxygen absorption regions. The new algorithm is combined with the current NOAA operational AMSU rain rate product for falling snow and rain areal extent retrievals over the U.S. These retrievals are compared with NEXRAD radar precipitation and local meteorological observations. Preliminary results demonstrate that the algorithm is robust in capturing winter precipitation with minimum classification errors. | 2022-12-30T17:30:53.408Z |
204,146,049 | {
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"DOI": "10.5059/yukigoseikyokaishi.24.713",
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"url": "https://www.jstage.jst.go.jp/article/yukigoseikyokaishi1943/24/9/24_9_713/_pdf"
} | The present invention relates to a method of polymer ization of tetrahydrofuran, more particularly to the ring opening polymerization of tetrahydrofuran by using a catalyst system consisting of an organoaluminum Com pound and a co-catalyst with or without water. It has heretofore been known that organoaluminum compounds polymerize aldehydes and various cyclic ethers, e.g., alkylene oxides such as ethylene oxide and propylene oxide or oxetane compounds such as 3,3-bis (chloromethyl) oxacyclobutane. But tetrahydrofuran cannot be polymerized by an organoaluminum compound alone. The inventors have found that tetrahydrofuran can be polymerized by the catalytic system consisting of an or ganoaluminum compound and a co-catalyst, and also that the catalyst system consisting of three components, i.e., an organoaluminum compound, water and a co-catalyst, sometimes has much higher activity than that of the two components without Water. An organoaluminum compound by itself has no cataly tic activity for the polymerization of tetrahydrofuran and is usually decomposed by water. Therefore it is ab solutely unexpected that an organoaluminum compound can be made catalytically active by means of a co-catalyst, and be activated further by addition of a suitable amount of water. The organoaluminum compounds to be used in the in vention may be expressed by the general formula of RAIX, wherein R represents alkyl, aryl, cycloalkyl, or aralkyl groups; X represents halogen; and n is 0, 1 or 2. Examples of such organoaluminum compounds are tri methylaluminum, triethylaluminum, tripropylaluminum, tributylaluminum, trihexylaluminum, tricyclohexylalu minum, triphenylaluminum, trinaphthylaluminum, dieth ylaluminum monochloride, ethylaluminum dichloride, ethylaluminum sesquichloride. Sometimes water activates the catalytic system consisting of an organoaluminum compound and one or more co-catalysts. The amount of water to be used for the preparation of the catalyst sys tem may be about 0.01 to 2 moles per mole of the or ganoaluminum compound, and the optimum effect can be obtained at about 0.5-1.5 moles. The effective co-catalysts to be used together with the organoaluminum compound with or without water are classified into the following two groups: (1) Cyclic alkylene oxides having the general formula | 2022-06-29T10:23:25.532Z |
115,764,818 | {
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"DOI": "10.31390/gradschool_disstheses.4966",
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"url": "https://digitalcommons.lsu.edu/cgi/viewcontent.cgi?article=5965&context=gradschool_disstheses"
} | We present) in this dissertation, a numerical simulation method to study interacting fermion systems. The general simulation pro cedures are discussed in connection with a description of a Quantum Monte Carlo simulation algorithm for interacting electrons on lat tices. The algorithm presented here has been used to simulate interact ing electrons on lattices, and it makes possible the study of substan tially larger systems than can be studied by other numerical methods. As long as certain limits of applicability are respected, model Hamiltonians of interacting electrons can be studied without resort to uncontrolled approximations. The method then provides nearly exact solutions to model Hamiltonians of many-body systems, in the sense that the degree of error can be controlled. We also discuss some results obtained from simulations of the extended Hubbard model and the periodic Anderson model. For the extended Hubbard model in two dimensions, different regions are identified where electron correlation produces antifer romagnetism, charge-density-waves, and singlet pairing supercon ducting behaviors. We also find regions where transitions from one type of correlation to another occur. | 2022-09-02T17:17:25.209Z |
83,712,389 | {
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"DOI": "10.1264/JSME2.20.127",
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} | The biodegradation of polychlorinated biphenyls (PCBs) has been studied extensively as these compounds are toxic to living organisms. The recent development of a genome-based analysis demonstrated that PCB degraders have various metabolic genes for degrading xenobiotics. The presence of many putative genes coding for oxygenases suggested that these degraders have increased their catabolic versatility. The analysis of crystal structures has also progressed in the past few years, and the analysis of reaction intermediates has revealed reaction mechanisms. These results can be applied to the creation of new catalytic functions by extending the substrate specificity of enzymes. A thermophilic PCB degrader was isolated and characterized. There are still difficulties with using PCB degraders for bioremediation. Physiological as well as ecological studies which clarify suitable conditions for degradation should be done for the development of PCB degradation in contaminated soil and sediments. | 2022-09-14T17:22:22.965Z |
147,139,577 | {
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"DOI": "10.1590/S1415-47142009000300001",
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} | ) psiquico seremos, imediatamente, re-metidos ao metodo clinico: espaco percorrido a cami-nho da palavra representante desse sofrimento.O metodo assim entendido contem uma logicaque nao e formal e se revela pela narrativa construi-da pelo medico e o paciente na situacao clinica.A psicopatologia e, portanto, discurso resultantede caminho visando um objetivo, ou seja, ela se reali-za por meio da pratica clinica. A pratica clinica e, porsua vez, caminho que se percorre e seu resultado, sem-pre precario, quando posto em palavra, chama-se psi-copatologia.A pratica clinica e social e, nessa perspectiva, soela e criterio de verdade na psicopatologia, poisdesencobre o sempre obscuro | 2022-11-18T01:14:14.961Z |
111,280,548 | {
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"DOI": "10.1063/1.4864934",
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} | The failure of propulsion components of ships and ferries can lead to serious environmental and economic damage or even the loss of lives. For ultrasonic inspection of such large components we employ mechanized scanning and defect reconstruction using the Synthetic Aperture Focusing Technique (SAFT). We report on results obtained in view of the detection of defects with different inspection techniques. Also, we address the issue of Probability of Detection by reporting results obtained in POD and MAPOD-studies (Model-Assisted POD) using experimental and simulated data. Finally, we show recent results of surface and sub-surface inspection using optical and eddy current techniques. | 2022-01-27T03:03:27.144Z |
14,696,197 | {
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"DOI": "10.1109/ICPPW.2012.25",
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} | On UAV missions, flight information should be prompt for use to all participating team members. Supporting from 3G mobile communications, UAV flight data can be uplink onto Internet and share with all users at different locations. Using an Android smart phone for data acquisition on airborne and cope with Google Earth® 3D map, the proposed UAS surveillance system is constructed on the cloud. The ground computer offers My SQL database management for all downlink data and converts into user friendly format for easy access. With special attitude and altitude display modes to match with UAV dynamic performance, it offers very good flight awareness to operator and observers throughout mission. This paper presents a technical realization on the UAS cloud surveillance system for Ce-71 UAV operations with excellent sense in surveillance. | 2022-12-03T12:57:10.347Z |
120,975,197 | {
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"DOI": "10.1175/1520-0469(2000)057<1141:AGIITN>2.0.CO;2",
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} | Abstract Spindown experiments have been conducted, using an atmospheric general circulation model, to determine the nature and timescale of adjustment to a baroclinically neutral state. The spindown was obtained by turning off the radiative cooling of the atmosphere—a procedure, the authors argue, that retains all the relevant constraints on the atmospheric motions. A further experiment with radiation and all other physical parameterizations turned off was performed for comparison. The neutral state was characterized by increased static stability but little reduction in meridional temperature gradient in the main baroclinic zones. However, the zones were observed to narrow and were flanked by regions where the meridional temperature gradient was reduced significantly. This pattern was repeated in the no-physics spin-down experiment but, in the absence of surface friction and strong orographic drag, the flow also appeared to be stabilized by enhanced barotropic shear. The neutral states from these two expe... | 2022-12-18T22:59:36.727Z |
23,255,201 | {
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"DOI": "10.1002/mrm.10423",
"MAG": "2018571636",
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} | Mouse models are expected to play an important role in future investigations of human cardiac diseases. In the present report, MRI methods for determining global and regional cardiac function in the mouse are demonstrated. ECG‐gated cine images were acquired in five C57BL/6 mice at physiological temperatures (37°C) and heart rates of 500 ± 50 beats per minute. Left ventricular mass, ejection fraction, and cardiac output were estimated from the resulting images. Regional myocardial function was also determined in three animals by application of 2D SPAtial Modulation of Magnetization (SPAMM) in combination with the cine protocol. The quality of the tagged images was sufficient to allow mapping of myocardial strains and displacements. The results of the regional strain analysis were consistent with similar studies in larger animals. This work demonstrates the first characterization of regional myocardial function in the mouse via SPAMM techniques. Magn Reson Med 49:760–764, 2003. © 2003 Wiley‐Liss, Inc. | 2022-12-19T11:58:08.877Z |
83,470,549 | {
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"DOI": "10.1533/9780857098870.2.49",
"MAG": "1926821339",
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} | Abstract: Monitoring the presence of enteric viruses in food is a challenging task, and molecular-based methods have become the reference detection methodology. This chapter describes in detail the main steps of the analytical process of detection of foodborne viruses by molecular methods, paying special attention to key aspects such as the interpretation of test results, the use of controls, and the implication for public health of the results obtained by molecular methods. | 2022-12-21T11:00:09.940Z |
4,914,528 | {
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"DOI": "10.1002/ptr.5942",
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} | Kratom (Mitragyna speciosa), a native herb of Southeast Asia, is widely known for its psychoactive properties. Recent increase in the use of kratom as a recreational drug has increased the risk of its interaction with conventional drugs if taken concomitantly. A few reports are available related to the effects of kratom on the activity of cytochrome P450 enzymes (CYPs), but there are no reports of its effects on pregnane X receptor (PXR), a transcription factor that regulates the expression of CYPs and P‐glycoprotein (P‐gp). This study was carried out to evaluate the effects of a methanolic extract of kratom leaves, an alkaloid rich fraction and its 5 indole and 4 oxindole alkaloids on PXR activation and the resulting changes in the mRNA expression of PXR target genes (CYP3A4, CYP1A2, and P‐gp). A significant activation of PXR was observed by the extract (3‐fold), alkaloidal fraction (4‐fold) and all 9 alkaloids (4‐ to 6‐fold) that was associated with an increased mRNA expression which resulted into an increase in the activity of CYP3A4, CYP1A2, and P‐gp. These results indicate that high consumption of Mitragyna speciosa extract along with the conventional drugs may lead to potential herb–drug interactions due to its effects on PXR. | 2022-12-23T08:27:13.495Z |
135,581,643 | {
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"DOI": "10.1149/1.1642576",
"MAG": "2116935247",
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} | We demonstrate the use of DigiSim, a commercially available computer code, to model both the cyclic voltammetric and photonic responses of electrogenerated chemiluminescent systems. With this approach we exploit the capability of DigiSim to simulate complex electrochemical behavior involving myriad coupled heterogeneous electron transfers and homogeneous reactions. The present work focuses on the simulation of a relatively simple mechanism for electrogenerating chemiluminescence. Use of multiple cycles and introduction of more complicated mechanisms, quasi-reversible electron transfer, uncompensated resistance, and capacitance entail straightforward modifications of the basic approach. | 2022-08-25T01:04:52.662Z |
129,720,211 | {
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"DOI": "10.1109/IGARSS.1998.703789",
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} | This paper presents observations of the Chesapeake Bay outflow plume front made with a new frequency-modulated interrupted continuous-wave (FMICW) dual-beam Doppler radar. The radar was deployed aboard the University of Delaware's Cape Henlopen research vessel for participation in the Naval Research Laboratory's (NRL) Chesapeake Bay Outflow Plume Experiments (COPE-I and COPE-II), which took place during September 1996 and May 1997. Relative radar cross-section and surface scatterer velocity vector measurements of the surface manifestation of the plume were made along with sub-surface current measurements made with an acoustic Doppler current profiler. The results show that the surface scatterer velocity obtained with the radar can be very different than that obtained with the current profiler. | 2022-08-26T13:44:07.532Z |
247,636,966 | {
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"DOI": "10.1002/ep.13854",
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} | Energy efficiency in buildings sector can provide influential solutions to the threats arising from the increase in carbon emissions. Since efficient design of the buildings and equipping them with renewable systems increases the final cost, strategies should be developed to encourage building owners. The first stage of these strategies is certification of these buildings. However, modeling of the buildings equipped with renewable systems is possible with the use of more than one software and requires detailed technical expertise. An easy‐to‐use software, where all calculations are conducted in a single software, will be useful in the spread of certification processes. For this reason, in this study, an easy‐to‐use software has been developed that can be used during the certification of zero energy buildings which eliminates the requirement of more than one software. The software makes use of the climate, electricity consumption, building, and renewable system properties data to predict the energy demand and production, and generate zero energy consumption building certificate. The heating demand, photovoltaic (PV) and wind system estimate of the software are verified by using real data and R2 values are calculated as 0.92, 0.97, and 0.98 respectively. A certificated passive and zero energy consumption building is modeled in the developed software as a case study building and NZEB certificate was awarded to the building by the software. Therefore, in this study, an easy‐to‐use software is developed and verified to certificate the on‐grid zero energy buildings that eliminates requirement of detailed technical knowledge and usage of more than one software. | 2022-09-07T23:49:23.107Z |
150,444,116 | {
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"DOI": "10.2307/3145813",
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},
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} | The author demonstrates that estimates made in an earlier article by Carol Dahl on the constancy of price elasticity of world gasoline demand have some econometric problems because of two variables used in the estimation. Dahl assumes the exogeneity of gasoline prices on two bases: (1) each country is a small share of the world market, and world gasoline market is competitive with unrestricted trade; and (2) most developing countries had government petroleum product price controls during the period under consideration. The author finds these two assumptions irrelevant and recommends disregarding the countries and time periods. Dahl responds that professional consensus and statistical evidence does not warrant making these omissions on the grounds of bias. 19 references, 2 figures. | 2022-09-13T00:01:17.509Z |
10,495,347 | {
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"DOI": "10.6061/clinics/2012(08)09",
"MAG": "2118457465",
"PubMedCentral": "3416896"
},
"license": "CCBYNC",
"status": "GOLD",
"url": "https://doi.org/10.6061/clinics/2012(08)09"
} | OBJECTIVES: Laparoscopic nephrectomy for xanthogranulomatous pyelonephritis is currently associated with great operative difficulty and surgical complications. Herein, we report on our single-center experience and describe predictive factors for successfully accomplishing this procedure. METHOD: Between March 1998 and April 2010, 66 patients (27 men and 39 women) underwent laparoscopic nephrectomy for the treatment of a unilateral nonfunctioning kidney. These patients had previous diagnoses of renal chronic inflammation associated with calculi and previous pyonephrosis. All of the nephrectomies were performed using the transperitoneal approach, and a similar technique was used for radical nephrectomy. RESULTS: Laparoscopic nephrectomy for the treatment of renal chronic inflammation was successful in 58/66 cases (87.9%). Eight cases were converted to the open technique because of difficulty in progression, which was related to the discovery of dense adhesions in the hilar or perirenal region. One major (colonic lesion) and two minor (wound infection) complications occurred in the conversion group. A diagnosis of xanthogranulomatous pyelonephritis was confirmed pathologically for all of the specimens. Of the factors examined, a longitudinal renal length greater than 12 cm (laparoscopy group - 7.2±1.8 cm, versus open group - 13.6±1.5 cm; p<0.05) and time to access the renal vessels (laparoscopy group - 32±18 min, versus open group - 91±11 min; p<0.05) were associated with a higher conversion rate. Although the number of patients in the conversion group was small, the majority of these patients received right-sided nephrectomy. CONCLUSIONS: Laparoscopic nephrectomy for the treatment of xanthogranulomatous pyelonephritis is feasible and associated with low levels of morbidity. Factors including the time required to control the renal vessels, renal length and right-sided nephrectomy were associated with higher chances of conversion into an open procedure. | 2022-12-17T13:07:07.389Z |
16,603,338 | {
"externalids": {
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"ArXiv": "0905.3989",
"DOI": "10.1214/ECP.V14-1503",
"MAG": "2104454175",
"PubMedCentral": null
},
"license": null,
"status": null,
"url": null
} | We prove an equality-in-law relating the maximum of GUE Dyson's Brownian motion and the non-colliding systems with a wall. This generalizes the well known relation between the maximum of a Brownian motion and a reflected Brownian motion | 2022-12-18T00:05:21.054Z |
232,421,622 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1021/acs.jctc.0c01308",
"MAG": null,
"PubMedCentral": "8047803"
},
"license": "CCBY",
"status": "GREEN",
"url": "https://europepmc.org/articles/pmc8047803?pdf=render"
} | Several experimental studies indicated that large conformational changes, including partial domain unfolding, have a role in the functional mechanisms of the basic helix loop helix Per/ARNT/SIM (bHLH-PAS) transcription factors. Recently, single-molecule atomic force microscopy (AFM) revealed two distinct pathways for the mechanical unfolding of the ARNT PAS-B. In this work we used steered molecular dynamics simulations to gain new insights into this process at an atomistic level. To reconstruct and classify pathways sampled in multiple simulations, we designed an original approach based on the use of self-organizing maps (SOMs). This led us to identify two types of unfolding pathways for the ARNT PAS-B, which are in good agreement with the AFM findings. Analysis of average forces mapped on the SOM revealed a stable conformation of the PAS-B along one pathway, which represents a possible structural model for the intermediate state detected by AFM. The approach here proposed will facilitate the study of other signal transmission mechanisms involving the folding/unfolding of PAS domains. | 2022-12-31T18:14:33.052Z |
54,438,987 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1109/ICCTCT.2018.8551031",
"MAG": "2903326980",
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},
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} | Energy conservation is indisputably important to all human beings, as we depend on energy for our regular routine in day to day life. Energy supplies are restricted, so we have to find ways to use energy sensibly. Energy saving is a key area of focus in recent time for many organizations and opportunities do exists in any given manufacturing units. In this paper, Different Research papers were studied and analysed. From this, Energy saving techniques and Different technologies related to use energy more efficiently and Emission Reduction are discussed. | 2022-01-27T19:03:49.195Z |
32,284,422 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1378/CHEST.48.1.14",
"MAG": "2077636905",
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},
"license": null,
"status": null,
"url": null
} | Present basic principles of tuberculosis control consist of (1) prevention of inter-human infection, (2) sterilization of the bacillary reservoir in the population, and (3) development of methods of prophylaxis. Historical changes in this century have brought us first through an era of basis hygiene, then one of specific therapy, and now, to the beginning of an era of prevention and prophylaxis for the future. Because of bacteriologic seeding already present among the living, concepts of eradication of tuberculosis at present probably must be thought of in terms of the next three generations, approaching a century in time. To start, maximum effort now for maximum achievable results with present methods will require (1) locating and treating all active cases, (2) monitoring all old cases and high risk groups, and (3) detecting all tuberculin reactors as a foundation for follow-up programs and prophylaxis when indicated. The role of every physician whatever his field is of paramount importance in such a program. Three critical times in the life cycle of each generation for tuberculosis where universal tuberculin testing is needed are (1) the child in school, (2) the young adult as a pre-marital requirement, and (3) the grandparent at retirement as a social security requirement. Basic tools needed for eradication but still lacking are (1) a universally effective vaccine, (2) an accurate serologic test for tuberculosis, and (3) a rapid-acting bacteriocidal therapeutic agent. Re-examination of our national research program in an effort to fulfill these needs is warranted now. In addition, changing social patterns in the United States today require development of new methods for reaching, educating, and motivating people if the future program for tuberculosis is to be carried to where the disease is. Eradication of tuberculosis as a national goal is a bold and worthy concept for which preparation should logically begin now, so that it may become achievable that much sooner in the future. | 2022-02-12T11:04:25.788Z |
30,560,613 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1109/TMEE.2011.6199387",
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} | It is inevitable to appear conflicts which are constituted by properties and sequences of events in multi-agent virtual warehouse collaboration system, because of the agents' characteristics of autonomy and heterogeneity. Temporal logic is the key to describe them. ITL includes a total of thirteen kinds of complete disjoint and joint sessions to describe the relationship among time. On this basis, we proposed a framework for formal description of temporal conflicts in MAS, and verified the framework in multi-agent virtual warehouse collaboration system. The framework contributes to more intuitive understanding of the essence of temporal conflict, and lays a good foundation for the resolution of conflicts and the stable operation of the system. | 2022-02-12T12:35:40.207Z |
71,284,586 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.4314/NJO.V19I1.70770",
"MAG": "1998747715",
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},
"license": null,
"status": null,
"url": null
} | Objective: To determine the techniques of cataract surgery as currently being practiced by ophthalmologists in Nigeria. Materials and Methods: A self-administered questionnaire was administered to practising ophthalmologists in Nigeria, selected by simple random sampling. Information sought included the type of cataract surgery performed and how often performed; the type of IOL (if any) used; mode of after-surgery care; and availability of biometry and YAG laser facilities. Results: Of the 90 ophthalmologists selected, 84 returned the questionnaire, giving 93.3% response rate. All the ophthalmologists perform cataract surgery. The more frequently employed techniques were the ECCE/IOL (73.8%) and SICS/IOL (29.8%); 2.4% occasionally perform phacoemulsification, while 26.2% occasionally perform intracapsular cataract extraction without intraocular lens implant. Ambulatory (day case) surgery was practiced by 20.2%. The PMMA lenses were most commonly used IOL (94.1%). Only 47.6% of the ophthalmologists have access to ocular biometry and YAG laser was available only to 10.7%. Conclusions: This survey suggests that the most popular cataract surgery technique in Nigeria at present is the wide incision ECCE/IOL and facilities for biometry and Nd:YAG laser are not commonly available. It is recommended that ophthalmologists in Nigeria upgrade both surgical techniques and instrumentation for better post-operative visual outcome for cataract patients. Key words: cataract, surgical techniques, Nigeria | 2022-06-05T09:14:31.199Z |
163,203,241 | {
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"ArXiv": null,
"DOI": "10.36198/9783838545394",
"MAG": "2526287230",
"PubMedCentral": null
},
"license": null,
"status": "GREEN",
"url": "http://d-nb.info/1079227857/04"
} |
Erfolgreich ins Biologie-Studium einsteigen
Was hat die Fähigkeit, gute Texte zu schreiben, mit einem erfolgreichen Biologiestudium zu tun?
Auch in den Naturwissenschaften ist wissenschaftliches Schreiben eines der wichtigsten Mittel, um Forschung durchführen, verstehen und kommunizieren zu können. Die Biologie greift dabei auf ein immer wiederkehrendes Format zurück, das vom Praktikum bis zur Bachelorarbeit genutzt wird.
In diesem Buch legt der Autor die Grundzüge des wissenschaftlichen Schreibens in der Biologie dar und erläutert, wie Schreiben als Werkzeug in der Forschung verwendet werden kann. | 2022-08-20T09:45:01.060Z |
204,368,851 | {
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"DOI": "10.1080/20445911.2019.1664557",
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} | ABSTRACT Imagining fictional creatures like zombies in survival situations boosts long-term memory for words encoded in these situations more than rating words for pleasantness (zombie effect). Study 1 required word-ratings in a zombie-survival scenario; participants were told they had to protect against either possible zombie attack or contamination. The zombie-survival situations yielded identical recall levels but higher recall rates than pleasantness. Study 2 matched a zombie-survival scenario on perceived fear with scenarios involving ghosts or predators. Perceived disgust in the zombie scenario was higher than in these other survival conditions. Words were remembered better when processed in survival scenarios than when rated for pleasantness, but there was no reliable difference in recall between the scenarios. In neither study did the number of death-related words produced in a word-fragment completion task fit the mortality salience account of the zombie memory effect. Overall findings suggest that this effect relates to the fear system. | 2022-09-03T18:34:48.191Z |
36,354,786 | {
"externalids": {
"ACL": null,
"ArXiv": null,
"DOI": "10.1109/CISIS.2011.75",
"MAG": "2032384491",
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},
"license": null,
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"url": null
} | In the paper a new volunteer computing environment dedicated for large-scale evolutionary computations is presented. It forms a distributed evolutionary multi-agent platform which utilizes Java applets as computational workers. After describing the general concept of the platform, the different possibilities of its deployment are discussed. | 2022-02-12T07:40:57.285Z |
236,351,124 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1080/23750472.2021.1930113",
"MAG": "3165512063",
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},
"license": "CCBYNCND",
"status": "HYBRID",
"url": "https://doi.org/10.1080/23750472.2021.1930113"
} | Helping individuals and teams achieve their goals by being resilient is an established research field in sport. How sport organisations can be resilient in adversity is comparatively neglected, so ... | 2022-12-10T06:35:57.030Z |
221,128,249 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1080/08923973.2020.1808986",
"MAG": "3049585678",
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},
"license": null,
"status": null,
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} | Abstract Inflammasome complex is regarded as a major molecular regulator that exerts a significant function in caspase-1 activation and consequently, the development of cytokines like interleukin-1β (IL-1β) and interleukin-18 (IL-18). The secretion of these cytokines may induce inflammation. The role of inflammasomes in the pathologic process of eye-related illnesses like glaucoma, age-related macular degeneration (AMD), and diabetic retinopathy has been well studied over the past decade. However, the detailed pathogenic mechanism of inflammasomes in these retinal diseases is still unknown. Therefore, further investigation and understanding various aspects of inflammasome complexes as well as their pivotal roles in the immunopathology of human ocular illnesses are essential. The present review aims to describe the significant involvement of inflammasomes in the immunopathology of important inflammatory retinal illnesses, including glaucoma, age-related macular degeneration (AMD), and diabetic retinopathy focusing on anti-inflammasome therapy as a promising approach in the treatment of inflammation-related eye diseases. | 2022-12-18T04:51:51.780Z |
93,966,136 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1163/156856108X292278",
"MAG": "1537308711",
"PubMedCentral": null
},
"license": null,
"status": null,
"url": null
} | Surface forces in low-dielectric media are much less understood than those in aqueous solutions. In this work, the technique of colloidal-probe atomic force microscopy (AFM) was used to measure the force between a silica sphere and a flat silica plate in dodecane. A transient attractive force was measured, which slowly vanished during the first hour of measurements, following the characteristic dielectric relaxation time of dodecane. Subsequently, equilibrium conditions were reached. Equilibrium forces exhibited a strong dependence on the relative humidity of the environment. An attempt was made to explain the transient attractive force in terms of electrostatic interaction. | 2022-07-03T22:37:23.673Z |
218,564,559 | {
"externalids": {
"ACL": null,
"ArXiv": "2005.11932",
"DOI": "10.1109/CISS48834.2020.1570617398",
"MAG": "3101705166",
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},
"license": null,
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"url": null
} | Recent WiFi-based fall detection systems have drawn much attention due to their advantages over other sensory systems. Various implementations have achieved impressive progress in performance, thanks to machine learning and deep learning techniques. However, many of such high accuracy systems have low reliability as they fail to achieve robustness in unseen environments. To address that, this paper investigates a method of generalization through adversarial data augmentation. Our results show a slight improvement in deep learning-systems in unseen domains, though the performance is not significant. | 2022-09-29T23:57:48.540Z |
226,615,502 | {
"externalids": {
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"ArXiv": null,
"DOI": "10.1109/JSEN.2020.3014799",
"MAG": "3048262880",
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} | As the working medium of machine, lubrication oil system is a very important component, which can be used to judge the operating conditions of machine, moreover, lubricating oil detection can eliminate the need for costly machine shutdowns for inspection. Metal particle is the most important parameter in lubrication oil detection. Inductance detection is one of the commonly used metal particle detection methods, with the development of micro fabrication technology, which can measure the sizes of metal particles and count the particles. In this paper, the model of ferromagnetic metal particle detection is established based on micro inductive sensor. It is obtained that the inductance change rate is proportional to the magnetic permeability of the metal particle and the cube of the particle size of metal particle. The tests about the metal particles with five different diameters are carried out, it is obtained that the theoretical values are in good agreement with the experimental values, the relative errors are less than 9.47%. And combined with experimental research, the magnetic permeability of ferromagnetic metal particles <inline-formula> <tex-math notation="LaTeX">$\mu \,\,3.907\times 10^{4}$ </tex-math></inline-formula> H/m, <inline-formula> <tex-math notation="LaTeX">$4.246\times 10^{4}$ </tex-math></inline-formula> H/m, <inline-formula> <tex-math notation="LaTeX">$4.092\times 10^{4}$ </tex-math></inline-formula> H/m, <inline-formula> <tex-math notation="LaTeX">$3.718\times 10^{4}$ </tex-math></inline-formula> H/m, <inline-formula> <tex-math notation="LaTeX">$4.07\times 10^{4}$ </tex-math></inline-formula> H/m and <inline-formula> <tex-math notation="LaTeX">$4.4289\times 10^{4}$ </tex-math></inline-formula> H/m is obtained when the radii of particles are <inline-formula> <tex-math notation="LaTeX">$25~\mu \text{m}$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$50~\mu \text{m}$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$100~\mu \text{m}$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$200~\mu \text{m}$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$500~\mu \text{m}$ </tex-math></inline-formula> and 1 mm, the relative errors <inline-formula> <tex-math notation="LaTeX">${E}_{\text{r}}=\vert 1- \mu {/} \mu _{\text{AVG}} \vert $ </tex-math></inline-formula> are less than 8.82%. | 2022-11-10T19:01:59.070Z |
1,916,740 | {
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"DOI": "10.1002/(SICI)1097-4687(200003)243:3<283::AID-JMOR5>3.0.CO;2-B",
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} | The renal anatomy of three species of sparrows, two from mesic areas, the House Sparrow (Passer domesticus) and Song Sparrow (Melospiza melodia), and one salt marsh species, the Savannah Sparrow (Passerculus sandwichensis) was examined. Electron microscopy was used to describe the ultrastructure of the nephron. In addition, stereology was used to quantify the volumes of cortex, medulla, and major vasculature of the kidneys, and the volumes and surface areas occupied by individual nephron components. There appeared to be no differences in the ultrastructural anatomy of the nephrons among the sparrows. Proximal tubules contained both narrow and wide intercellular spaces filled with interdigitations of the basolateral membrane. The thin limbs of Henle contained very wide intercellular spaces which were absent in the thick limbs of Henle. The distal tubule cells contained short, apical microvilli and infoldings of the basolateral membrane. In cross section, the medullary cones of all birds display an outer ring of thick limbs of Henle which surround an inner ring of collecting ducts, which in turn surround a central core of thin limbs of Henle. The Savannah Sparrow has a significantly higher volume of medulla compared to the two more mesic species. Within the cortex, the Savannah Sparrow also has a significantly higher volume of proximal tubules but a significantly lower volume of distal tubules than the other species. Within the medulla, the Savannah Sparrow has a significantly higher volume and surface area of capillaries, and a significantly higher surface area of thick limbs of Henle and collecting ducts than the mesic species. These data suggest that the salt marsh Savannah Sparrow has the renal morphology necessary to produce a more highly concentrated urine than the mesic zone species. J. Morphol. 243:283–291, 2000 © 2000 Wiley‐Liss, Inc. | 2022-12-20T00:32:38.353Z |
131,573,288 | {
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"DOI": "10.1093/PETROLOGY/EGM069",
"MAG": "2140506409",
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} | The petrological characteristics of peridotite xenoliths exhumed from the lithospheric mantle below the Western Pacific arcs (Kamchatka, NE Japan, SW Japan, Luzon-Taiwan, New Ireland and Vanuatu) are reviewed to obtain an overview of the supra-subduction zone mantle in mature subduction systems. These data are then compared with those for peridotite xenoliths from recent or older arcs described in the literature (e.g. New Britain, Western Canada to USA, Central Mexico, Patagonia, Lesser Antilles and Pannonian Basin) to establish a petrological model of the lithospheric mantle beneath the arc. In currently active volcanic arcs, the degree of partial melting recorded in the peridotites appears to decrease away from the fore-arc towards the back-arc region. Highly depleted harzburgites, more depleted than abyssal harzburgites, occur only in the frontal arc to fore-arc region. The degree of depletion increases again to a degree similar to that of the most depleted abyssal harzburgites within the back-arc extensional region, whether or not a back-arc basin is developed. Metasomatism is most prominent beneath the volcanic front, where the magma production rate is highest; silica enrichment, involving the metasomatic formation of secondary orthopyroxene at the expense of olivine, is important in this region because of the addition of slab-derived siliceous fluids. Some apparently primary orthopyroxenes, such as those in harzburgites from the Lesser Antilles arc, could possibly be of this secondary paragenesis but have been recrystallized such that the replacement texture is lost. The Ti content of hydrous minerals is relatively low in the sub-arc lithospheric mantle peridotites. The K/Na ratio of the metasomatic hydrous minerals decreases rearward from the fore-arc mantle as well as downward within the lithospheric mantle. The lithospheric mantle wedge peridotites, especially metasomatized ones from below the volcanic front, are highly oxidized. Shearing of the mantle wedge is expected beneath the volcanic front, and is represented by fine-grained peridotite xenoliths. | 2022-12-19T14:34:13.258Z |
116,843,916 | {
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"DOI": "10.1049/IET-GTD.2016.1791",
"MAG": "2737507927",
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},
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"url": null
} | Integration of distributed generation (DG) in existing distribution networks has been studied thoroughly during the past years as a measure of reducing grid's power losses. However, the optimal DG placement, known as ODGP, toward loss minimisation, has not been studied in depth by considering the possible impact of the reverse power flow (RPF) caused by extended penetration of distributed energy resources. This study uses a constriction factor embedded local particle swarm optimisation algorithm along with the appropriate particle formulation that solves the ODGP problem by taking into account the impact of possible RPF. In this study, the idea of RPF modelling is introduced by providing extended versions of IEEE test systems. Modified versions of the IEEE 30-bus and IEEE 33-bus test systems are modelled and results are presented in order to highlight the impact of RPF on the ODGP problem solution. The mathematical formulation is given, results and analysis for both extended systems are presented, while the importance of RPF for different conditions is assessed. | 2022-12-21T17:37:22.938Z |
153,749,600 | {
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"DOI": "10.1111/1468-0289.00092",
"MAG": "2031370791",
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} | A ustralia and Canada have distinctively different macroeconomic histories. Australia's GDP per caput was well above those of Britain and the United States in 1870, and more than twice the Canadian level. By the 1980s the figure for Canada almost matched the United States, and was substantially above that of Australia and Britain. Why Canada and Australia, both regions of recent European settlement with British colonial origins, should have widely different macroeconomic records raises a number of puzzles, which we explore by utilizing new developments in growth theory and time series analysis. Our primary purpose is to investigate the extent to which Australia's links with Britain, and Canada's with the United States, shaped the comparative economic development of the two dominions. Convergence of incomes between economies arises naturally within Solow's growth model as leaders suffer diminishing returns to investment.2 However, the historical records of Australia and Canada, in comparison with those of Britain and the United States, point to a greater complexity in patterns of economic development than predicted by simple growth models, and diversity appears even greater outside the English-speaking world.3 Abramovitz argues that income convergence depends on social capability, and his perspective may shed light on the performance of the two dominions.' The possibility that income convergence may be conditional on social capability receives formal treatment in Barro's growth model, which augments the standard Solow approach to incorporate, for example, differences in education.5 Here convergence may be long drawn out, as in the case of income levels between individual US states. The issue of social capability centres on the cultural and institutional milieu underpinning an economy's technological capability. Within the augmented | 2022-12-30T18:22:35.617Z |
73,633,556 | {
"externalids": {
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"DOI": "10.6018/analesps.33.2.270211",
"MAG": null,
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},
"license": "CCBYNCND",
"status": "GOLD",
"url": "https://revistas.um.es/analesps/article/download/analesps.33.2.270211/210801"
} | The aim of the present study is to illustrate how the appropriate or inappropriate application of exploratory factor analysis (EFA) can lead to quite different conclusions. To reach this goal, we evaluated the degree to which four different programs used to perform an EFA, specifically SPSS, FACTOR, PRELIS and MPlus, allow or limit the application of the currently recommended standards. In addition, we analyze and compare the results offered by the four programs when factor analyzing empirical data from scales that fit the assumptions of the classic linear EFA modeling adequately, ambiguously, or optimally, depending on the case, through the possibilities the different programs offer. The results of the comparison show the consequences of choosing one program or another; and the consequences of selecting some options or others within the same program, depending on the nature of the data. Finally, the study offers practical recommendations for applied researchers with a methodological orientation. | 2022-12-31T20:07:22.370Z |
229,046,996 | {
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"ArXiv": null,
"DOI": "10.1017/iop.2020.67",
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} | In explaining the influences of older workers’ ability and motivation to continue working (i.e., successful aging at work), Kooij et al. (2020) discuss the influences of macro, meso, micro, and temporal factors. Conceptually, this set of potential influences is comprehensive. However, the authors provide less clarity on the scope of the particular influences themselves. At the macro (societal) level, detail was lacking on the scope of potential institutional and cultural influences. At the meso level, more explanation was needed on how social aspects of the workgroup and the job, such as the people that one works with and the skillor knowledge-based characteristics of the job that one does, influence older workers’ ability and motivation to continue working. At the micro level, sociocultural aspects of the individual older workers themselves, such as their gender, subjective age, and communal affiliation, were not discussed. Finally, the different aspects of time that may influence an older worker’s ability and motivation to continue working were not elaborated upon. The purpose of my commentary is to provide insight regarding these issues via reference to a recently advanced ecological systems view of work and aging by Marcus et al. (2020). Using the ecological systems perspective, explained below, I expand upon the focal article by clarifying the roles of (macro) institutional and cultural, (meso) workgroup/job, (micro) demographic, and temporal factors on older workers’ ability and motivation to continue working. | 2022-02-04T04:58:13.274Z |
46,260,946 | {
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"DOI": "10.1109/CRMICO.2000.1255834",
"MAG": "2976950937",
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} | The results of the development of microwave FET amplifiers are presented. The narrowband low-noise amplifiers have demonstrated the noise figure of 0.8-1.8 dB at gain of 15-30 IB over 15% bandwidth in the frequency range of 0.4-18.0 GHz. The ultrabroadband low-noise amplifiers have achieved the noise figure of 5.0-7.5 dB at gain of 25.0-33.0 dB in the frequency range of 2.0-22.0 GHz. The narrowband medium power amplifiers have demonstrated gain of 18.0-36.0 dB at the noise figure of 8.0 dB with output power of 80.0-100 mW in line mode over 10% bandwidth in the frequency range of 28.0-40.0 GHz. | 2022-07-01T04:41:13.198Z |
240,045,261 | {
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"DOI": "10.2147/JMDH.S337258",
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"PubMedCentral": "8558039"
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} | Purpose The COVID-19 pandemic poses a serious threat to healthcare workers and hospitalized patients. Early detection of COVID-19 cases is essential to control the spread in healthcare facilities. However, real-world data on the screening criteria for hospitalized patients remain scarce. We aimed to explore whether patients with negative results of pre-hospital screening for COVID-19 should be rescreened after admission in a low-prevalence (less than 3% of the world average) setting. Patients and Methods We retrospectively included patients in central Taiwan who were negative at the first screening but were newly diagnosed with pneumonia or had a body temperature above 38 degrees Celsius during their hospitalization. Each patient might be included as an eligible case several times, and the proportions of cases who were rescreened for COVID-19 and those diagnosed with COVID-19 were calculated. A logistic regression model was constructed to identify factors associated with rescreening. Reverse transcription-polymerase chain reaction tests were used to confirm the diagnosis of COVID-19. Results A total of 3549 cases eligible for COVID-19 rescreening were included. There were 242 cases (6.8%) who received rescreening. In the multivariable analysis, cases aged 75 years or older, those with potential exposure to SARS-CoV-2, or patients visiting specific departments, such as the Cardiovascular Center and Department of Neurology, were more likely to be rescreened. None was diagnosed with COVID-19 after rescreening. There was no known cluster infection outbreak in the hospital or in the local community during the study period and in the following two months. Conclusion In Taiwan, a country with a low COVID-19 prevalence, it was deemed safe to rescreen only high-risk hospitalized patients. This strategy was effective and reduced unnecessary costs. | 2022-08-29T05:49:10.534Z |
202,963,075 | {
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"DOI": "10.2298/tsci190131349a",
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"license": "CCBYNCND",
"status": "GOLD",
"url": "http://www.doiserbia.nb.rs/img/doi/0354-9836/2019/0354-98361900349A.pdf"
} | This paper studies the analytical and numerical solutions for (2+1)-D Konopelchenko-Dubrovsky equation. It also examines the performance of the modified simplest equation method and the cubic B-spline scheme on this model. Many explicit wave solutions are found by using the analytical technique. These solutions allow studying the physical properties of this model. The comparison between the analytical and numerical solutions are discussed to show which one of cubic B-spline scheme families is more accurate in finding the numerical solutions of this model. | 2022-10-23T14:44:33.553Z |
225,346,425 | {
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"DOI": "10.33448/rsd-v9i8.6128",
"MAG": "3046765951",
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},
"license": "CCBY",
"status": "GOLD",
"url": "https://rsdjournal.org/index.php/rsd/article/download/6128/5894"
} | Objetivo: elaborar e validar uma proposta de plano de cuidados a partir da ligação North American Nursing Diagnosis Association-International, Nursing Interventions Classification - Nursing Outcomes Classification para os diagnósticos do domínio enfrentamento e tolerância ao estresse, identificados em pessoas vivendo com a Sindrome da Imunodeficiência Adquirida. Método: estudo metodológico, realizado com 25 especialistas e 113 pessoas vivendo com Sindrome da Imunodeficiência Adquirida. Seguiram-se tais etapas: elaboração dos Diagnósticos, Intervenções e resultados de enfermagem; elaboração de um plano de cuidados e validação de conteúdo por grupo focal. Resultados: validou-se um plano de cuidados contendo 4 diagnósticos de enfermagem (Ansiedade; Síndrome do estresse por mudança; Medo; Risco de sentimento de impotência), 4 resultados, 20 indicadores, 4 intervenções e 31 atividades. Conclusão: os diagnósticos, resultados e intervenções encontrados possibilitaram a elaboração e validação de um plano de cuidados para pessoas vivendo com Sindrome da Imunodeficiência Adquirida. | 2022-01-24T21:36:58.791Z |
95,300,536 | {
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"ArXiv": null,
"DOI": "10.1039/B100101I",
"MAG": "2036174030",
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} | The partial structure factors (PSF) of molten ZnCl2 at 600 K have been known since 1981 due to the neutron diffraction experiments by Biggin and Enderby (S. Biggin and J. E. Enderby, J. Phys. C, 1981, 14, 3129). It is shown in this article that the set of PSF derived from this experiment is not consistent with new X-ray diffraction data with much better statistical accuracy. A new set of PSF is derived, which corrects this deficiency. The first diffraction peak is not dominated by the cation–cation-PSF and the set of PSF shows similarities to the PSF of glassy GeO2 and SiO2 determined recently. The derived PSF are shown to be insensitive to whether ionic or atomic form-factors are used. | 2022-12-10T04:44:02.946Z |
216,591,628 | {
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"DOI": "10.1080/01457630120594",
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},
"license": null,
"status": "CLOSED",
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} | Raychem HTS is introducing a new ̄ exible heating cable that maintains temperatures to 300°F (150°C) and withstands exposure temperatures of 482°F (250°C) with the cable powered a offo . Designed for use on metal pipes, tanks and vessels, the new VPL heating cable is rated at 5, 10, 15 and 20 watts per foot at 50°F (10°C). VPL is approved by FM and CSA for use in hazardous areas. The positive temperature coef® cient effect (PTC) of the heating element reduces power output as ambient temperature increases. This PTC effect reduces the temperature of the cable at overlap contact points to eliminate overheating. VPL’s power output at high temperatures exceeds the thermal ratings of self-regulating heating cables. Where high maintenance temperatures are required, a single pass of cable may be suf® cient to offset the pipe heat loss when alternative cable types require multiple passes. Additionally, VPL’s low inrush current reduces breaker sizing and power distribution wiring. VPL is manufactured with a proprietary high temperature ̄ uoropolymer insulation complete with metal braid and ̄ uoropolymer overjacket. All materials are rated for exposure to 482°F (250°C) continuously with the cable powered a offo . VPL Power-Limiting heating cable is available immediately from Raychem HTS distributors. | 2022-01-27T01:30:56.844Z |
229,167,922 | {
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"DOI": "10.1017/S1431927620020097",
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} | Staphylococcus aureus is an opportunistic pathogen responsible for a wide range of infections in humans and livestock. Most resistance and virulence factors in S. aureus are encoded on mobile genetic elements (MGEs), including bacteriophages, genomic islands and plasmids. Transduction by bacteriophages provides the main means for horizontal transfer of MGEs in S. aureus, which is not naturally transformable and rarely undergoes conjugation. The emergence of virulent, antibiotic resistant strains of S. aureus is a considerable public health concern, and has re-ignited interest in the use of bacteriophages for therapeutic use against these pathogens. | 2022-01-27T12:33:42.489Z |
76,767,543 | {
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"DOI": "10.17795/CCN-6543",
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} | Background: Patients experience moderate to high level of anxiety before surgery. Many strategies such as sedative-hypnotic agents are developed to improve anxiety. Objectives: The current study aimed to determine the eect of video and images of operating room on patients' anxiety, before general surgery. Patients and Methods: A clinical trial was performed on 60 patients undergoing general surgery referred to Shahid Beheshti hospi- tal in Kashan, Iran, from 2014 to 2015. By convenient sampling method, sixty patients were selected and randomly allocated into the experimental and control groups. In the experimental group, the video information and images about operating room was played by a laptop for each patient for 30 minutes on the day before surgery and in the morning before surgery. The state anxiety of the two groups was measured after intervention. The control group received verbal information (the usual method in hospitals). Data analysis was conducted using 2 test, independent T-test and paired T-test by SPSS software version 16. Results: The mean scores of state and trait anxiety before and after intervention are presented in result section. In the experimental group, mean scores of state anxiety decreased from 3.1 43.8 to 2.3 32.4, following the intervention (P = 0.02). However, mean scores did not significantly change in the control group (P = 0.3). Conclusion: The current study results indicated that the video and images about operating room can reduce anxiety in patients undergoing general surgery. | 2022-06-06T18:46:16.954Z |
26,068,237 | {
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"DOI": "10.1111/1523-1747.EP12479265",
"MAG": "2019395193",
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} | Sunlight and some environmental chemical agents produce lesions in the DNA of human skin cells that if unrepaired may interfere with normal functioning of these cells. The most serious outcome of such interactions may be malignancy. It is therefore important to develop an understanding of mechanisms by which the lesions may be repaired or tolerated without deleterious consequences. Our models for the molecular processing of damaged DNA have been derived largely from the study of bacterial systems. Some similarities but significant differences are revealed when human cell responses are tested against these models. It is also of importance to learn DNA repair responses of epidermal keratinocytes for comparison with the more extensive studies that have been carried out with dermal fibroblasts. Our experimental results thus far indicate similarities for the excision-repair of ultraviolet-induced pyrimidine dimers in human keratinocytes and fibroblasts. Both the monoadducts and the interstrand crosslinks produced in DNA by photoactivated 8-methoxypsoralen (PUVA) can be repaired in normal human fibroblasts but not in those from xeroderma pigmentosum patients. The monoadducts, like pyrimidine dimers, are probably the more mutagenic/carcinogenic lesions while the crosslinks are less easily repaired and probably result in more effective blocking of DNA function. It is suggested that a split-dose protocol that maximizes the production of crosslinks while minimizing the yield of monoadducts may be more effective and potentially less carcinogenic than the single ultraviolet exposure regimen in PUVA therapy for psoriasis. | 2022-12-15T09:17:07.880Z |
24,641,561 | {
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"DOI": "10.1002/JMV.20195",
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} | While many studies have investigated the relationship between cell type and dengue virus infection, no study to date has examined the effect of cell physiology on permissiveness to infection. Unsynchronized and artificially synchronized cell populations at different stages of the cell cycle of two cell types (Vero and HepG2) were examined for permissiveness to infection by two dengue virus serotypes (serotypes 2 and 3) by determining both the levels of virus produced as well as the percentage of cells infected. Vero cells showed no significant differences between either viral production or percentage of cells infected as compared to unsynchronized cells for any of the phases investigated, although production of virus (for both serotypes 2 and 3) was somewhat lower for cells infected during S phase. In contrast, HepG2 cells were significantly more permissive for both infection and virus production in the G2 phase as compared to other phases examined and serotype differences in permissiveness to infection were noted with cells in the M phase of the cell cycle. These results suggest that the cell cycle may be a mediator of cell permissiveness in some cell types. J. Med. Virol. 74:434–441, 2004. © 2004 Wiley‐Liss, Inc. | 2022-12-19T18:24:42.994Z |
22,951,944 | {
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"DOI": "10.1002/jlb.55.6.719",
"MAG": "2267958274",
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} | The purpose of this study was to determine the influence of endogenous interleukin‐1 (IL‐1) on resistance to paratuberculosis infection in experimentally infected gnotobiotic mice. Following a 6‐month treatment with prednisolone to facilitate bacillary multiplication, control mice substantially reduced the numbers of M. paratuberculosis in the liver and ileum. In contrast, mice injected with a monoclonal antibody against the type I IL‐1 receptor failed to reduce the numbers of M. paratuberculosis in the liver and ileum and exhibited more liver granulomas, which contained numerous acid‐fast bacilli. These results indicate a significant role for endogenous IL‐1 in host defense against experimental M. paratuberculosis infection in mice. J. Leukoc. Biol. 55: 719–722; 1994. | 2022-08-26T04:40:43.032Z |
155,953,644 | {
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"DOI": "10.7049/JCYU.201201.0067",
"MAG": "2285528626",
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} | This article examines the effect that allowing institutional traders to invest in the futures market had on the Taiwan stock market. The study is based on daily trading records from 2 July 2007 to 31 December 2009-a total of 682 daily data sets. The research procedure involves identifying the stationality of a time series for each variable using the Augmented Dickey-Fuller unit root test, a serial correlation test with the Ljung-Box test, causality tests using Granger's methodology, and the estimation of a vector autoregressive (VAR) model. The results show that some of the variables under investigation are interrelated. In terms of estimating the VAR model, the impact that opening futures trade to institutional investors has had no significant effect on the Taiwan stock market. | 2022-02-09T01:03:14.308Z |
144,053,613 | {
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"ArXiv": null,
"DOI": "10.1086/438688",
"MAG": "1984198956",
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} | These books are intended to be read rather than to be studied. They are not designed to be tasks, but recreations. They do not follow the conventional classification of the college but treat of natural and industrial processes from a novel and practical viewpoint. They show that science is not a remote and recondite study but a part of everyday life, the unseen foundation of all we see and do [p. viii]. In general, the aim expressed in the preceding paragraph seems a worthy one. As a whole, it may be said that the book accomplishes its purpose of providing harmless recreational reading. However, one of the dangers involved is that the reader of such a diluted treatment of psychological principles may mistake the froth for the substance and use with harm to himself or others the semipsychological or pseudo-psychological information secured. Psychology has hardly reached the stage of development and crystallization as a science where it can accurately and safely be popularized for general consumption by children. CARTER V. GOOD MIAMI UNIVERSITY | 2022-02-09T07:11:34.283Z |
211,831,154 | {
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"DOI": "10.3390/ma13051087",
"MAG": "3009879019",
"PubMedCentral": "7084481"
},
"license": "CCBY",
"status": "GOLD",
"url": "https://www.mdpi.com/1996-1944/13/5/1087/pdf?version=1583157156"
} | The aim of the current study is to introduce a methodology aimed at producing a biosensor that uses gold nanoparticles (AuNPs) to detect porcine circovirus 2 (PCV-2). This biosensor was based on AuNPs, which were modified with self-assembled monolayers (SAMs) and antibodies. The AuNPs’ surface and virus modification process applied to enable antibody binding was accompanied by localized surface plasmon resonance (LSPR), surface plasmon resonance (SPR), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX). Virus quantification was possible by the light absorption difference in the spectrum at concentrations of 105, 106, 107, 108, and 109 DNA copies/mL PCV-2 in relation to quantitative PCR (qPCR), with an R2 value >0.98. The visualization of colorimetric changes in the different PCV-2 concentrations was possible without the use of equipment. The biosensor production methodology presented reproducibility and specificity, as well as easy synthesis and low cost. An enhanced version of it may be used in the future to replace traditional tests such as PCR. | 2022-12-02T11:55:45.438Z |
32,014,497 | {
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"DOI": "10.1111/j.1749-6632.1979.tb56511.x",
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} | Evidence has been presented regarding alterations of contractile behavior muscle biochemistry, and ulstrastructure during the course of the hereditary hamster cardiomyopathy. Also, preliminary structural and mechanical data were presented on the acquired cardiomyopathy of diabetes mellitus in experimental animals. In the hamster model, contractile performance, measured as isometric tension and rate of tension development, was shown to be depressed throughout the course of the disease, whereas normalized force-velocity relationships returned to normal only during the compensated stages of hypertrophy. Force-frequency relationships were depressed in myopathic muscles, indicating the presence of alterations in the muscle activation system, namely, the biochemical and functional integrity of the sarcoplasmic reticulum. Analysis of the contractile proteins in myopathic muscle has revealed depressions of Ca2+ activity in purified myosin in addition to an independently increased neutral protease activity that results in the specific degradation of LC2 of myosin. Sympathetic time and norepinephrine turnover increase progressively during the course of the disease. These changes are accompanied by decreasing tissue levels of neorepinephrine and increasing levels of dopamine, indicating a shift in the rate-limiting step for norepinephrine synthesis. Alterations were also noted in nuclear protein composition and serotonin levels. Microscopically, the myolytic and calcification changes that characterize the hamster cardiomyopathy have been confirmed. In addition, contraction bands and lysosomal changes have been observed that may relate to cateholamine hypersensitivity. In the experimental model of diabetic cardiomyopathy, a significant alteration in relaxation process was demonstrated despite the fact that peak tension development and its rate of development were unaltered. Also, the length dependence of contractile behavior was altered when compared to that of age-matched controls, indicating a potential loss of contractility reserve. When animals with combined hypertension and diabetes were studied, bothe contraction and relaxation processes were affected to a greater degree. | 2022-12-14T15:21:39.079Z |
83,839,034 | {
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"DOI": "10.1537/ASE.105.159",
"MAG": "1977295653",
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} | We describe a series of preliminary experiments undertaken to investi-gate the relationship between complicated tool-making and the presence or absence of language in its communicative role. The experiments involved teaching two groups of university students how to make Levallois flakes by either verbal or non-verbal demonstration. The rates and mean times of acquisition of the Levallois technique and of successful flake production were compared. They did not differ significantly between the two groups. From these results, we infer that spoken language was not indispensable for Levallois flake production in the Middle Palaeolithic. | 2022-12-26T18:48:17.179Z |
6,987,417 | {
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"DOI": "10.1109/ICBBE.2010.5516262",
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} | An experiment was conducted under hydroponic culture conditions to determine effects of nitrogen (N), phosphorus (P) and sulfur (S) deficiency on Tagetes erecta L. growth, cadmium (Cd) accumulation and chemical forms. Seedlings of similar age and size were pre-cultured in either N-, P-, or S-deficient nutrition solution for 12 days before exposure to 0.1 mg Cd L-1 (nonphytotoxic). The control group had normal nutrient supply before and during Cd exposure. The plants were harvested after 15 days' exposure to Cd. Plant growth was inhibited by nutrient deficiencies. Cd appeared to accumulate preferentially in the youngest leaves with nutrient deficiencies, and leaf Cd concentrations were lower than that of control for N- and P-deficiency but the S-deficiency treatment had higher leaf Cd accumulation. P deficiency increased Cd concentrations in stems and roots by 24 and 123 mg kg-1 (DW), respectively. Different organs contained Cd in different chemical forms, as determined by selective extraction reagents. In leaves, the Cd forms extracted by 2% acetic acid and 1M NaCl were predominant. In stems, the Cd forms extracted by1M NaCl were predominant. In roots, Cd extractable by 80% ethanol was the primary chemical form except in the P-deficiency treatment, where it was by 1M NaCl. The results suggested that nutrient deficiencies did not significantly affect the chemical forms of Cd in plant tissues except the forms in roots of the P-deficiency treatment plants, but the deficiencies obviously affected Cd distribution among plant tissues. The study indicates that Cd accumulation in plants tissues is closely related to provision of nutrition to the tissues. | 2022-02-13T09:20:50.072Z |
129,619,902 | {
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"DOI": "10.1017/S0252921100061285",
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} | The history of the International Latitude Service and the International Polar Motion Service is described, with an emphasis on the evolution of the international cooperation for monitoring the Earth’s rotation. Also given is a brief description of the history of the Japanese geodetic and astronomical activities, as well as the future prospects. | 2022-08-25T00:15:41.502Z |
109,823,639 | {
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"DOI": "10.3141/1892-18",
"MAG": "2006697771",
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} | Nondestructive testing of concrete structures plays an increasing role in civil engineering, although until now the full potential of such techniques has not been tapped. For posttensioned structures, the investigation of tendon ducts is one of the most essential testing problems. The location of tendon ducts, the determination of concrete cover and, especially, the detection and quantification of ungrouted areas inside the ducts are the relevant questions. Recent developments and opportunities of radar, impact-echo, and ultrasonics for the investigation of tendon ducts are presented. Although the obtained results on positioning and concrete cover determination are sufficient, the location of ungrouted areas is still a matter of research. Thus, new approaches for this testing problem have to be considered. Additionally, the combined use of complementary techniques offers a high potential to increase the reliability of results. Data will be displayed on the combined application of acoustic and electromagnetic impulse-echo methods and of data fusion related to the investigation of tendon ducts. | 2022-10-20T16:06:42.536Z |
685,465 | {
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"DOI": "10.1109/RSP.2006.2",
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} | This paper presents generation tool and performance results on a method to minimize the amount of hardware needed to implement a parallel digital finite impulse response (FIR) filters for hardwired (fixed coefficients) implementation targeted for high performance. The generation tool employ a combination of two approaches: first, the reduction of the coefficients to n-power-of-two (NPT) terms, where the maximum number of non-zero in each coefficient is taken as a constraint, followed by common subexpression elimination (CSE) among multipliers. Synthesis results for a range of different filter specifications, using Quartus II FPGA synthesis tool are presented | 2022-12-13T11:31:48.405Z |
25,198,347 | {
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"DOI": "10.1109/TPC.2007.902656",
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} | Findings from a previous study indicate that dominance was a key inhibitor of creativity in virtual teams. This study extends understanding of dominance through an in-depth, qualitative analysis of eight virtual teams. Two research questions are addressed: (1) how is dominance manifested in virtual teams? and (2) why does dominance occur in some teams, and not others? Findings indicate that dominance occurred in three different patterns. Although both males and females dominated, a commonality across patterns was that the dominant individual belonged to the majority sex in each team. Furthermore, dominance was driven by a combination of a few team member status traits. When one or more status markers belonged to a single person - the dominant member - and were absent in other team members, dominance was pronounced. In teams that did not experience dominance, these status indicators were spread across multiple members. Additionally, even though all teams communicated strictly via asynchronous computer-mediated communication (CMC), equalization was not evidenced in the majority of teams. Status characteristics theory and proportional representation theory provide a basis to explain the prevalence, as well as the absence, of dominance in these virtual teams. | 2022-12-18T13:03:21.912Z |
12,967,440 | {
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"DOI": "10.1105/tpc.107.057877",
"MAG": "2012186108",
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"license": null,
"status": "GREEN",
"url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2438466"
} | Shoot apical meristems (SAMs) are self-sustaining groups of cells responsible for the ordered initiation of all aerial plant tissues, including stems and lateral organs. The precise coordination of these processes argues for crosstalk between the different SAM domains. The products of YABBY (YAB) genes are limited to the organ primordium domains, which are situated at the periphery of all SAMs and which are separated by a margin of three to seven cells from the central meristem zone marked by WUSCHEL and CLAVATA3 expression. Mutations in the two related YAB1 genes, FILAMENTOUS FLOWER and YABBY3 (YAB3), cause an array of defects, including aberrant phyllotaxis. We show that peripheral YAB1 activity nonautonomously and sequentially affects the phyllotaxis and growth of subsequent primordia and coordinates the expression of SAM central zone markers. These effects support a role for YAB1 genes in short-range signaling. However, no evidence was found that YAB1 gene products are themselves mobile. A screen for suppression of a floral YAB1 overexpression phenotype revealed that the YAB1-born signals are mediated in part by the activity of LATERAL SUPPRESSOR. This GRAS protein is expressed at the boundary of organ primordia and the SAM central zone, distinct from the YAB1 expression domain. Together, these results suggest that YAB1 activity stimulates signals from the organs to the meristem via a secondary message or signal cascade, a process essential for organized growth of the SAM. | 2022-12-26T16:04:16.083Z |
149,051,688 | {
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"DOI": "10.5465/AMBPP.2017.13877abstract",
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} | A large body of work in economic and organizational sociology underscores the constraining power of widely taken-for-granted market categories. Recent work by Hsu and Grodal (2015), however, provid... | 2022-02-09T04:36:10.881Z |
93,842,981 | {
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} | The authors have studied Raman scattering from the collective excitations in a semiconductor superlattice system, and analysed the reason for the small peak intensity ratio of the surface to the bulk plasmons in the Raman spectra under the usual experimental conditions. They find that the ratio has a strong dependence on the decay length of the incident photon. If the decay length is small enough the ratio will increase adequately, which is very favourable for the experimental observation of the surface plasmon. | 2022-02-10T16:44:27.132Z |
219,010,094 | {
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"DOI": "10.1080/10282580.2020.1761230",
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} | The Other Side of Assimilation: How Immigrants are Changing American Life focuses on three distinct, yet interrelated immigrant communities in and around San Jose, California; Cupertino, East Palo ... | 2022-07-10T02:37:30.310Z |
62,148,529 | {
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"DOI": "10.1002/ECJA.10142",
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} | An important problem of the adaptive array antenna proposed previously in regard to its installation is the increased equipment size. This is because the adaptive array antenna requires as many RF circuits as the number of antenna elements. In this paper, in the case where there is an input in one system, we study an adaptive array antenna with sequential processing (AAA-SP) in which the MMSE (minimum mean square error) criterion is used to control array weights by means of sequential processing of sampled signal data. Since there is only one input system in this case, it is found that the SINR is degraded due to reduction of correlation among elements if the conventional MMSE criterion is used as the adaptive control algorithm. Hence, in order to improve the deterioration of the SINR, a tapped-delay-line adaptive array antenna with sequential processing (TDL-AAA-SP) is proposed in which oversampling and a TDL-AAA are combined. It is theoretically proven that the TDL-AAA-SP improves the SINR by recovering from reduction of correlation by means of correlation on the time axis. A computer simulation demonstrates that the proposed scheme is effective. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 87(2): 59–67, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.10142 | 2022-09-02T08:25:07.661Z |
252,893,541 | {
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"DOI": "10.52792/tws.1132474",
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"url": "https://dergipark.org.tr/tr/download/article-file/2493642"
} | Günümüz Türk Ordusunun tarihsel kökenleri çok eskiye dayansa da organizasyon yapısı ve subay yetiştirme modellerini anlamak için 19’uncu yüzyılın ilk dönemini yani Yeniçeri teşkilatının kaldırılmasından sonra meydana gelen gelişmeleri incelemek gerekir. 1834’de Harp Okulu ve 1848’de Harp Akademisinin kuruluşu ile birlikte sırasıyla Fransız, Alman ve Amerikan modellerine göre tasarlanan subay eğitim-öğretim modelinin anlaşılabilmesi için eğitim-öğretim ilkeleri göz önünde bulundurulmalıdır. Bu çalışma nitelikli bir subaylar grubu yetiştirmek için gereken akademik öğrenim-askeri eğitim dengesi ve birbiriyle bağlantılı müfredat oluşturulması, dönüşümlü görev, ileri seviye subay eğitimine yeterli sayıda subayı tefrik etmek ve ayrıca eğitim-öğretim metotlarını birer değişken olarak kabul ederek subay eğitim-öğretim modelini diğer ülkelerle karşılaştırmalı bir yöntemle analiz etmektedir. Dolayısıyla her değişimde ortaya çıkan yeni modelin yeterliliğini ölçmeyi hedeflemektedir. Başlangıçtan itibaren Fransız, Alman ve Amerikan modellerini tecrübe eden tek kuvvet olması ve sayısal büyüklüğü itibariyle Kara Kuvvetleri ve komuta kademesini oluşturması nedeniyle ağırlıklı olarak kurmay subay eğitim-öğretimi çalışmanın odağındadır. Çalışmada arşiv belgeleri, resmi askeri yayınlar, konuyla ilgili yerli ve yabancı kaynaklar ve subaylarla yapılan mülakatlardan faydalanılmıştır. | 2022-11-25T01:01:22.612Z |
59,939,891 | {
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"DOI": "10.17159/2413-3051/2010/V21I2A3252",
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} | This paper reports on the investigation of the simulation accuracy of a second order Stirling cycle simulation tool as developed by Urieli (2001) and improvements thereof against the known performance of the GPU-3 Stirling engine. The objective of this investigation is to establish a simulation tool to perform preliminary engine design and optimisation. The second order formulation under investigation simulates the engine based on the ideal adiabatic cycle, and parasitic losses are only accounted for afterwards. This approach differs from third order formulations that simulate the engine in a coupled manner incorporating non-idealities during cyclic simulation. While the second order approach is less accurate, it holds the advantage that the degradation of the ideal performance due to the various losses is more clearly defined and offers insight into improving engine performance. It is therefore particularly suitable for preliminary design of engines. Two methods to calculate the performance and efficiency of the data obtained from the ideal adiabatic cycle and the parasitic losses were applied, namely the method used by Urieli and a proposed alternative method. These two methods differ essentially in how the regenerator and pumping losses are accounted for. The overall accuracy of the simulations, especially using the proposed alternative method to calculate the different operational variables, proved to be satisfactory. Although significant inaccuracies occurred for some of the operational variables, the simulated trends in general followed the measurements and it is concluded that this second order Stirling cycle simulation tool using the proposed alternative method to calculate the different operational variables is suitable for preliminary engine design and optimisation. | 2022-11-05T17:22:15.224Z |
137,522,163 | {
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"DOI": "10.1117/12.204887",
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} | A large field of applications as microelectronics, micromechanics and optics needs to overcome the deposition of various materials showing dielectric, superconducting, piezoelecinc properties under thin film form. Numerous methods were developed as Chemical Vapour Deposition, Sputtering, Thermal Evaporation. Since the early 1980's, a new process based on laser ablation is developed.1 The Pulsed Laser Deposition (P.L.D) method is based on the laser evaporation of a target and the subsequent deposition of the ablation plume on a substrate (see fig. 1). A wide variety of materials was successfully deposited in thin film form by this method. Recently, Nb5Te4 thin films were realized for the first time by using P.L.D process.3 The Nb5Te4 compound presents strong anisotropic properties and finds applications in microelectronics (1D conductors) and micromechanics (solid lubricant). These first results3 shown the key roles played by the laser fluence and the substrate temperature on the film composition and crystallisation. For example, increasing the laser fluence decreases the interreticular distance observed by X-ray diffraction and increases the Te/Nb ratio. This shows the importance of kinetic parameters of the laser-induced plume on the crystallisation process. In order to understand the influence of the laser parameters on the film formation, it is necessary to study the ablation process and the expansion of the ablation cloud. | 2022-12-17T12:39:17.002Z |
18,702,502 | {
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"DOI": "10.1109/WAINA.2014.117",
"MAG": "2040025935",
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} | Nowadays the number of vehicular users demanding mobile data services greatly increases due to the high penetration rate of smart phones, laptops and tablets. Under this scope, the 3GPP working group for LTE standardization, is paying more attention on vehicular scenarios, like railways environments. The proposed solution for improving performance in high speed railways scenario, is the mobile relay node. The authors focus on Type-1 in-band relays, which have been proposed for LTE-Advanced. In this work, authors investigate the issue of mobile relay capacity improvement for on-board train users and its impact on the overall network performance. Besides, the impact of several key configuration parameters of MRN, like the number of MBSFN sub frames, will be assessed. | 2022-12-26T21:53:30.668Z |
118,957,680 | {
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"ArXiv": "1706.07271",
"DOI": "10.5488/CMP.20.23401",
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} | In this paper it is shown that the enhancement factor of the local electric field in metal covered ellipsoidal nanoparticles embedded in a dielectric host matrix has two maxima at two different frequencies. The second maximum for the metal covered inclusions with large dielectric core (small metal fraction $p$) is comparatively large. This maximum strongly depends on the depolarization factor of the core $L_{z}^{(1)}$, keeping that of the shell $L_{z}^{(2)}$ constant and is less than $L_{z}^{(1)}$. If the frequency of the external radiation approaches the frequency of surface plasmons of a metal, the local field in the particle considerably increases. The importance of maximum value of enhancement factor $|A|^{2}$ of the ellipsoidal inclusion is emphasized in the case where the dielectric core exceeds metal fraction of the inclusion. The results of numerical computations for typical small silver particles are presented graphically. | 2022-08-20T18:51:23.240Z |
127,989,691 | {
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"DOI": "10.4324/9781315829593",
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} | Foreword 1. Editorial 2. Water Quality: Assessment of the Current Situation in Asia 3. Economic Incentives Can Enhance Policy Efforts to Improve Water Quality in Asia 4. Exploring the Boundaries of Water Quality Management in Asia 5. Emerging Contaminants and the Implications for Drinking Water 6. An Overview of Policies Impacting Water Quality and Governance in India 7. Water Quality Management in China 8. An Integrated Management Approach for Water Quality and Quantity: Case Studies in North China 9. Institutional Capacity on Water Pollution Control of the Pearl River in Guangzhou, China 10. Soil Erosion Control and Sediment Load Reduction in the Loess Plateau: Policy Perspectives 11. Managing Urban Rivers and Water Quality in Malaysia for Sustainable Water Resources 12. Improving Groundwater Quality Management for the Sustainable Utilization of the Bangkok Aquifer System 13. Nutrient Balance Assessment in the Mekong Basin: Nitrogen and Phosphorus Dynamics in a Catchment Scale | 2022-12-06T14:57:08.515Z |
86,880,142 | {
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"DOI": "10.1086/physzool.43.2.30155517",
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} | Some marine teleosts in arctic, antarctic, and temperate waters in winter have elevated serum osmotic concentrations due to an organic "anti-freeze" (Scholander et al. 1957; Gordon, Amdur, and Scholander 1962; Potts and Morris 1968; Umminger 1968; deVries and Wohlschlag 1969). In none of these serums is the freezing point as low as the freezing point of seawater; rather, the organic solutes facilitate supercooling. Many subarctic and a few temperate-zone marine fish living at low temperatures have elevated sodium chloride concentration (Woodhead and Woodhead 1959; Pearcy 1961; Gordon 1962; Umminger 1968). The sodium concentration in muscle fibers of marine fish | 2022-12-11T13:25:11.446Z |
55,426,081 | {
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"DOI": "10.1515/bot-2012-0157",
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},
"license": null,
"status": "GREEN",
"url": "https://scholars.unh.edu/cgi/viewcontent.cgi?article=1362&context=nhaes"
} | Abstract Blackler first recorded Colpomenia peregrina in the Northwest Atlantic based on collections from Nova Scotia, Canada. Five decades later we found large quantities of C. peregrina in Maine, USA, even though it was absent during earlier floristic studies in this region. Thus, C. peregrina has undergone a rapid southern expansion along the Northwest Atlantic coast. While the causes of such an expansion are unknown, it could have a major effect on both shellfish cultivation and native seaweeds within New England because of competitive interactions and increased drag. | 2022-12-23T02:09:05.871Z |
127,960,421 | {
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"DOI": "10.3406/HOM.1999.453620",
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} | Suivant la notion d'ethno-esthetique plus particulierement definie par Michel Leiris, l'A. refute la validite d'une perception ou esthetique ou fonctionnelle de l'art africain. Les enquetes de terrain a l'origine de ses recherches ont ete conduites dans la region de Gaoua, au sud-ouest du Burkina Faso, aupres de sculpteurs lobi, parmi lesquels Tyohepte Pale ou Tyohoulinte Hien. Des intentions personnelles qui sont les leurs, il ressort que les statuettes (thil-bia) sont considerees, tant par ces artistes que leurs clients, selon des qualites et fonctionnelles et plastiques - d'autant plus solidaires que la beaute d'une sculpture participe de son efficacite. C'est une des raisons pour lesquelles chaque sculpteur est in situ reconnu pour ses dons et son talent, tout comme en Occident. Ici ou la, en depit d'une histoire et d'un environnement singuliers, les artistes ne seraient en somme guere differents : tels Tyohepte Pale et Alberto Giacometti qui partagent de semblables representations symboliques a meme de donner forme et sens a leurs œuvres, rappelant que l'art, d'ou qu'il soit, aurait notamment partie liee avec la mort. | 2022-02-09T15:46:08.289Z |
45,922,741 | {
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"DOI": "10.1109/ISCE.2004.1375894",
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} | ~ JPEG compression is a wide!v ased compres,sion standard for still image.7. We pre.sent a rohast digital image waterinurking algorithm that i s compatible with U baseline ./PEG coinprexsion standard. The DCT c0efficient.s hi an 8x8 block have a parent-child srriicture ~~~hic l z s similar to tl7at of wavelet transform. We e.rp1oit this propery IO cwhed a watermark with maximuin strength and least perceptihilih,. The watermark detection is per?&"d without wferring to the original image. Simtilation results .shaw thut the prapmed algorithm is robust agoinst iwious sigi7ul pmce.ssing /echnique.s and JPEG coding. Transform) Index Terms -Digital Watermarking, DCT (Discrete Cosine | 2022-02-12T00:11:15.661Z |
90,998,886 | {
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"DOI": "10.1136/bjo.85.7.781",
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"license": null,
"status": "BRONZE",
"url": "https://bjo.bmj.com/content/bjophthalmol/85/7/781.full.pdf"
} | Figure
The Union Jack butterfly ( Delias myisis ) is found along the tropical northeast coast of Queensland, Australia, including the Cape York Peninsula, and has the typical languid and random flight of most butterflies. But the behaviour of these solitary creatures belies their dynamic physiology, surprising learning abilities, and truly sensational visual mechanisms.
Investigators seeking further understanding of the visual mechanisms found members of a closely related species to be quick studiers when learning the whereabouts of food. Moreover, through behavioural techniques, these same investigators proved that butterflies definitely have colour vision, and even have colour constancy. This ability allows the neurological system of butterflies to draw conclusions about colour (and food sources) when the same wavelength may be not presented. For example, a flower that appears red in broad daylight may appear to be a dark maroon on an overcast day and/or when blooming in the shade of a tree. Any animal that relies on colour perception for food must have some degree of colour constancy or would not be able to recognise food sources in differing light. As with many other insects, butterflies also see into the ultraviolet, and can even detect polarised light. Many butterflies have inborn preferences for certain colours. Although not evaluated in many butterfly species, some species are known to have preferences for yellow and/or blue.
Usually when you see a butterfly, though, you don't think of colour constancy. … | 2022-06-30T18:09:51.740Z |
16,158,089 | {
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"DOI": "10.1109/TePRA.2012.6215646",
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} | Traditionally, the automotive industry has been the largest employer of robots, but their control is inline and programmed to follow planning trajectories. In this case, in the motor's department test of Volskwagen México a semi autonomous robot is developed to generally purpose. Some critical technical problems must be solved in a number of areas, including in dynamics and control. Generally, the attitude estimation and the measurement of the angular velocity are a requirement for the attitude control. As a result, the computational cost and the complexity of the control loop is relatively high. In the present paper, a techniques for attitude stabilization are proposed; the technique proposed is designed with attitude estimation and the prediction of the movement. With this approach, only the measurements of at least two non-collinear directional sensors are needed. Since the control laws are highly simple and a model-based observer for angular velocity reconstruction is not needed, the proposed new strategy is very suitable for embedded implementations. The global convergence of the estimation and prediction techniques are proved. Simulations with some robustness tests are performed. | 2022-09-11T08:11:16.197Z |
87,163,073 | {
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"DOI": "10.1126/SCIENCE.11643368",
"MAG": "2068791909",
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} | Science serves its readers as a forum for the presentation and discussion ofimportant issues related to the advancement of science, including the presentation of minority or conflicting points of view, rather than by publishing only material on which a consensus has been reached. Accordingly, all articles published in Scienceincluding editorials, news and comment, and book reviews-are signed and reflect the individual views of the authors and not official points of view adopted by the AAAS or the institutions with which the authors are affiliated. | 2022-09-13T19:31:59.455Z |
129,154,841 | {
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"DOI": "10.1017/S0016756800096394",
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} | Amongst Mr. James L. Begg’s recent collections of fossils from the Upper Bala (Starfish Bed) of Thraive Glen, Girvan, there are several specimens of the genus Conularia, one of which has the apertural lobes well preserved, which is apparently unique in British Ordovician examples of this genus, and another shows internal structures of peculiar interest. A third new species is closely related to the one which Miss Slater named C. hispida, and a fourth is allied to C. plicata Slater. In Miss Slater’s monograph 1 on the British Conulariae, published in 1907, the following four species were described from the Upper Bala of Thraive Glen: C. cf. aspersa Lindstr., which is typically a Wenlock species; C. hispida Slater, which was also founded on Wenlock specimens; and C. plicata Slater and C. planiseptata Slater, which were recorded only from Thraive Glen. | 2022-12-04T21:00:33.965Z |
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