cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generalised Kochen-Specker Theorem for Finite Non-Deterministic Outcome Assignments
Creators: name: Ramanathan, Ravishankar
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Kochen-Specker (KS) theorem is a cornerstone result in quantum foundations, establishing that quantum correlations in Hilbert spaces of dimension $d \geq 3$ cannot be explained by (consistent) hidden variable theories that assign a single deterministic outcome to each measurement. Specifically, there exist finite sets of vectors in these dimensions such that no non-contextual deterministic ($\{0,1\}$) outcome assignment is possible obeying the rules of exclusivity and completeness - that the sum of value assignments to any $d$ mutually orthogonal vectors be equal to $1$. Another central result in quantum foundations is Gleason's theorem that justifies the Born rule as a mathematical consequence of the quantum formalism. The KS theorem can be seen as a consequence of Gleason's theorem and the logical compactness theorem. Notably, Gleason's theorem also indicates the existence of KS-type finite vector constructions to rule out other finite alphabet outcome assignments beyond the $\{0,1\}$ case. Here, we propose a generalisation of the KS theorem that rules out hidden variable theories with outcome assignments in the set $\{0, p, 1-p, 1\}$ for $p \in [0,1/d) \cup (1/d, 1/2]$. The case $p = 1/2$ is especially physically significant. We show that in this case the result rules out (consistent) hidden variable theories that are fundamentally binary, i.e., theories where each measurement has fundamentally at most two outcomes (in contrast to the single deterministic outcome per measurement ruled out by KS). We present a device-independent application of this generalised KS theorem by constructing a two-player non-local game for which a perfect quantum winning strategy exists (a Pseudo-telepathy game) while no perfect classical strategy exists even if the players are provided with additional no-signaling resources of PR-box type (with marginal probabilities in $\{0,1/2,1\}$).
description: 14 pages, 5 figures
Diet/Health Concerns About Fat Intake
Creators: name: Putler, Daniel
name: Frazao, Elizabeth
name: Putler, Daniel
name: Frazao, Elizabeth
Publisher: name: Unknown
Year: 1991
Subjects: Health Economics and Policy
Public Economics

description: For more than a generation, Americans have been warned that a diet high in fat increases the probability of chronic health problems, such as coronary heart disease (CHD) and cancer. Whether based on awareness of this relationship or on economic and social factors, consumers are changing their eating habits. We are eating less red meats and eggs, and more poultry, fish and seafood, and fresh fruits and vegetables (see USDA per capita consumption data, July- September 1990 National Food Review). While the change in diet has lowered fat intake, many women are merely substituting one source of fat for another.
On the Big Bounce Singularity of a Simple 5D Cosmological Model
Creators: name: Xu, Lixin
name: Liu, Hongya
name: Wang, Beili
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The big bounce singularity of a simple 5D cosmological model is studied. Contrary to the standard big bang space-time singularity, this big bounce singularity is found to be an event horizon at which the scale factor and the mass density of the universe are finite, while the pressure undergoes a sudden transition from negative infinity to positive infinity. By using coordinate transformation it is also shown that before the bounce the universe contracts deflationary, and the universe has been existed, according to the proper-time, for an infinitely long time.
description: Revtex, 10 pages, 2 figures, references added
Cordaites lingulatus
Creators: name: Galtier, Jean
name: Ronchi, Ausonio
name: Broutin, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Pinopsida
Cordaitales
Cordaitaceae
Cordaites
Cordaites lingulatus

description: Cordaites cf. lingulatus Grand’Eury, 1877   (Fig. 9F)
 This leaf, found associated with the stem of Figure 9A, has a thin lamina (0.4 mm), a smooth surface and very closely spaced veins (less than 0.4 mm interval, i.e. about 25 per cm). Rectangular sclerotic strands extend above and below veins; the mesophyll is differentiated into palisade and more or less spongy tissues. Despite similarities with the species C. lingulatus Grand’Eury as illustrated by Renault (1879) this leaf may represent variability of other species like Cordaites principalis Germar, as illustrated by Harms & Leisman (1961).
description: Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on page 62, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948
title: The effect of long-chain polyunsaturated fatty acid and vitamin E supplementation of ewes on neonatal lamb behaviour and performance
Creators: name: Capper, Judith Louise
Publisher: name: The Open University
Year: 2005

description: Three experiments investigated the effect of long-chain polyunsaturated fatty acid (PUFA) and vitamin E supplementation of ewes upon lamb vigour and performance. In Experiment One, four diets were fed to 48 ewes in a two-by-two factorial design. Each diet contained either fish oil (high in C20:5n-3 and C22:6n-3) or Megalac® (control fat, C16:0) and a basal (50 mg/kg) or supranutritional (500 mg/kg) concentration of vitamin E. Fish oil supplementation significantly increased ewe gestation length, deposition of C22:6n-3 in lamb brain tissue and neonatal lamb vigour. It also had significant detrimental effects upon milk composition and lamb growth. Vitamin E supplementation of the ewe increased the concentration of the vitamin in lamb brain and muscle tissue, and improved lamb birthweight. Within Experiment Two, three treatment diets based on algae (high in C22:6n-3), linseed (high in C18:3n-3) or Megalac® were fed to sixty pregnant ewes. After parturition, thirty ewes were changed onto diets containing either linseed or Megalac®. Gestation length and brain C22:6n-3 content were unaffected by diet, although lamb vigour was improved by maternal PUFA supplementation. The use of strategic supplementation abrogated the effects of PUFA supplementation upon lamb growth rate. Nevertheless, significant effects of algal supplementation were observed upon milk composition after a 28-day change-over period. Experiment Three employed three diets, each containing either fish oil or Megalac® plus basal or supranutritional vitamin E, followed by Megalac® supplementation during lactation. Gestation length and lamb behaviour were unaffected by treatment diet. Differences in milk composition were observed 28 days after the diet change. Long-chain PUFA supplementation of the pregnant ewe appears to improve neonatal lamb vigour, although effects upon milk composition cannot be negated by changing the dietary fat source during lactation. The vitamin E status of the neonatal lamb may be manipulated by maternal supplementation.
Catalogue with visual morphological classification of 32,616 radio galaxies with optical hosts
Creators: name: Żywucka, Natalia
name: Kozieł-Wierzbowska, Dorota
name: Goyal, Arti
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the catalogue of Radio sources associated with Optical Galaxies and having Unresolved or Extended morphologies I (ROGUE I). It was generated by cross-matching galaxies from the Sloan Digital Sky Survey Data Release 7 (SDSS DR 7) as well as radio sources from the First Images of Radio Sky at Twenty Centimetre (FIRST) and the National Radio Astronomical Observatory VLA Sky Survey (NVSS) catalogues. We created the largest handmade catalogue of visually classified radio objects and associated with them optical host galaxies, containing 32,616 galaxies with a FIRST core within 3 arcsec of the optical position. All listed objects possess the good quality SDSS DR 7 spectra with the signal-to-noise ratio $>$10 and spectroscopic redshifts up to $z=0.6$. The radio morphology classification was performed by a visual examination of the FIRST and the NVSS contour maps overlaid on a DSS image, while an optical morphology classification was based on the 120 arcsec snapshot images from SDSS DR 7. The majority of radio galaxies in ROGUE I, i.e. $\sim$ 93%, are unresolved (compact or elongated), while the rest of them exhibit extended morphologies, such as Fanaroff-Riley (FR) type I, II, and hybrid, wide-angle tail, narrow-angle tail, head-tail sources, and sources with intermittent or reoriented jet activity, i.e. double-double, X-shaped, and Z-shaped. Most of FR IIs have low radio luminosities, comparable to the luminosities of FR Is. Moreover, due to visual check of all radio maps and optical images, we were able to discover or reclassify a number of radio objects as giant, double-double, X-shaped, and Z-shaped radio galaxies. The presented sample can serve as a database for training automatic methods of identification and classification of optical and radio galaxies.
description: Proceedings paper under the IAU symposium "Nuclear Activity in Galaxies Across Cosmic Time", eds. M. Povic, P. Marziani, J. Masegosa, H. Netzer, S. H. Negu, and S. B. Tessema
ВЛИЯНИЕ ПОВРЕЖДЕННОСТИ МАТЕРИАЛА НА ПАРАМЕТРЫ НЕЛИНЕЙНОЙ ИЗГИБНОЙ И ПРОДОЛЬНОЙ ВОЛН, РАСПРОСТРАНЯЮЩИХСЯ В БАЛКЕ
Creators: name: Ерофеев Владимир Иванович
name: Бриккель Дмитрий Максимович
Publisher: name: Проблемы информатики
Year: 2021
Subjects: изгибная волна
продольная волна
параметр поврежденности материала
геометрическая нелинейность
физическая нелинейность

description: Предлагается подход, позволяющий получить новые зависимости параметров нелинейных изгибных и продольных волн от степени поврежденности материала. В частности, рассмотрены задача о формировании интенсивных изгибных волн стационарного профиля в рамках геометрически нелинейной модели поврежденной балки, а также задача о формировании продольных волн, где дополнительно учитываются геометрическая и физическая нелинейности. В ходе исследования, при возникновении в элементе нелинейных изгибных волн, определено наличие как периодических, так и уединенных (локализованных в пространстве) несинусоидальных волн. Показано, что амплитуды уединенных и периодических волн увеличиваются с ростом параметра поврежденности, а длина периодической и ширина уединенной волны уменьшаются с ростом рассматриваемого параметра. При возникновении в элементе нелинейных продольных волн доказано, что ширина солитона уменьшается при уменьшении параметра поврежденности, в свою очередь, скорость солитона линейно увеличивается с ростом параметра поврежденности. Определены новые зависимости волновых параметров (амплитуда, ширина, длина волны) с учетом их геометрической нелинейности от параметров поврежденности материала. Данная работа является продолжением ряда статей о новом подходе, позволяющем сформулировать математическую модель, описывающую распространение волн в элементах с учетом накопления повреждений в их материалах.
Integrable geodesic flows on Riemannian manifolds: Construction and Obstructions
Creators: name: Bolsinov, Alexey V.
name: Jovanovic, Bozidar
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 70H06, 37J35, 53D17, 53D25

description: This paper is a review of recent and classical results on integrable geodesic flows on Riemannian manifolds and topological obstructions to integrability. We also discuss some open problems.
description: 37 pages
ПРИМЕНЕНИЕ АЛГОРИТМА КОВАЧИЧА ДЛЯ ИССЛЕДОВАНИЯ ЗАДАЧИ О КАЧЕНИИ ТЯЖЕЛОГО ОДНОРОДНОГО ШАРА ПО ПОВЕРХНОСТИ ВРАЩЕНИЯ
Creators: name: Соломина Дарья Владимировна
name: Кулешов Александр Сергеевич
Publisher: name: Проблемы информатики
Year: 2021
Subjects: качение без проскальзывания; однородный шар; поверхность вращения; алгоритм Ковачича; лиувиллевы решения

description: Задача о качении без скольжения однородного шара по неподвижной поверхности под действием силы тяжести является одной из классических задач механики неголономных систем. Обычно при рассмотрении этой задачи, следуя подходу, предложенному в трактате Э. Дж. Рауса [1], принято задавать в явном виде поверхность, по которой движется центр шара, а не опорную поверхность, по которой катится шар. Поверхность, по которой движется центр шара, является эквидистантной к поверхности, по которой движется точка контакта. Еще из работ Э. Дж. Рауса [1] и Ф. Нетера [2] было известно, что если при качении шара по поверхности под действием силы тяжести его центр движется по поверхности вращения, то задача сводится к интегрированию одного линейного дифференциального уравнения второго порядка относительно компоненты скорости центра шара в проекции на направление касательной к параллели поверхности вращения. В общем случае (для произвольной поверхности вращения) получить решение этого уравнения в явном виде невозможно. Поэтому представляет интерес вопрос, для каких поверхностей вращения соответствующее линейное дифференциальное уравнение второго порядка допускает общее решение, выражающееся в явном виде, например, с помощью лиувиллевых функций. Лиувиллевы функции — это функции, которые строятся последовательно из рациональных функций с использованием алгебраических операций, неопределенного интегрирования и взятия экспоненты заданного выражения (3, 4]. Необходимые и достаточные условия существования решения линейного дифференциального уравнения второго порядка, выражающегося через лиувиллевы функции, дает так называемый алгоритм Ковачича (4]. В данной работе мы приводим наш собственный способ получения линейного дифференциального уравнения второго порядка, к интегрированию которого сводится задача о качении тяжелого шара по неподвижной поверхности, такой что центр шара при качении движется по заданной поверхности вращения. Затем при помощи замены независимой переменной мы приводим коэффициенты этого уравнения к виду рациональных функций. Применяя затем к полученному линейному дифференциальному уравнению второго порядка алгоритм Ковачича, мы показываем, что для случая, когда центр шара принадлежит параболоиду вращения, общее решение данного уравнения выражается через лиувиллевы функции.
How does the $S_{11}$ $N^*(890)$ state emerge from a naive $K$ matrix fit?
Creators: name: Ma, Yao
name: Niu, Wen-Qi
name: Wang, Yu-Fei
name: Zheng, Han-Qing
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We give a pedagogical analysis on $K$ matrix models describing the $πN$ scattering amplitude, in $S_{11}$ channel at low energies. We show how the correct use of analyticity in the $s$ channel and crossing symmetry in $t$ and $u$ channels leads to a much improved analytic behavior in the negative $s$ region, in agreement with the prediction from chiral perturbation amplitudes in its validity region. The analysis leads again to the conclusion that a genuine $N^*(890)$ resonance exists.
description: 9pages, 7 figures
The banality of banality : [book review of Inside Prime Time by Todd Gitlin. Pantheon, 1986.]
Creators: name: Aufderheide, Patricia
Publisher: name: Village Voice
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Book review published in: Village Voice, Oct. 25, 1983 Article unavailable in digital format from the publisher.
Feedback cooling of a single trapped ion
Creators: name: Bushev, Pavel
name: Rotter, Daniel
name: Wilson, Alex
name: Dubin, Francois
name: Becher, Christoph
name: Eschner, Juergen
name: Blatt, Rainer
name: Steixner, Viktor
name: Rabl, Peter
name: Zoller, Peter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on a real-time measurement of the motion of a single ion in a Paul trap, we demonstrate its electro-mechanical cooling below the Doppler limit by homodyne feedback control (cold damping). The feedback cooling results are well described by a model based on a quantum mechanical Master Equation.
description: 4 pages, 3 figures
Design and Realization of a Benchmarking Testbed for Evaluating Autonomous Platooning Algorithms
Creators: name: Shaham, Michael
name: Ranjan, Risha
name: Kirda, Engin
name: Padir, Taskin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Autonomous vehicle platoons present near- and long-term opportunities to enhance operational efficiencies and save lives. The past 30 years have seen rapid development in the autonomous driving space, enabling new technologies that will alleviate the strain placed on human drivers and reduce vehicle emissions. This paper introduces a testbed for evaluating and benchmarking platooning algorithms on 1/10th scale vehicles with onboard sensors. To demonstrate the testbed's utility, we evaluate three algorithms, linear feedback and two variations of distributed model predictive control, and compare their results on a typical platooning scenario where the lead vehicle tracks a reference trajectory that changes speed multiple times. We validate our algorithms in simulation to analyze the performance as the platoon size increases, and find that the distributed model predictive control algorithms outperform linear feedback on hardware and in simulation.
description: To be published in International Symposium on Experimental Robotics, 2023
ПРИМЕНЕНИЕ МЕТОДОВ МАШИННОГО ОБУЧЕНИЯ В СТРОИТЕЛЬСТВЕ
Creators: name: Кислицын Дмитрий Игоревич
name: Куприянова Татьяна Викторовна
Publisher: name: Проблемы информатики
Year: 2021
Subjects: алгоритмы машинного обучения
интеллектуальный анализ данных
ранжирование инцидентов на строительной площадке

description: Поскольку в строительной сфере ежегодно увеличивается спрос на инновационные проекты, возник вопрос о применении методов машинного обучения при производстве на строительной площадке. В данной статье описывается суть предлагаемого варианта разработки автоматизированного модуля для строительного производства с использованием методов машинного обучения. В нем представлены функции предсказания и ранжирования инцидентов на строительной площадке, а также автоматического назначения ответственного лица за закрытие инцидента. Продемонстрирован возможный интерфейс программы, в которой будет выполняться анализ поступившей информации с различных источников системы мониторинга случаев на строительном производстве, распределение инцидентов по признакам на соответствующие категории и их цветовая маркировка по степени важности, создание заявок на устранение возникших инцидентов и назначение ответственных лиц за закрытие возникающих проблемных случаев. При реализации предлагаемого автоматизированного модуля ожидаются положительные результаты, в числе которых минимизация количества пропущенных инцидентов и сокращение времени реакции на возникающие проблемные ситуации.
Relationships between osteoarthritic changes (osteophytes, porosity, eburnation) based on historical skeletal material
Creators: name: Myszka, Anna
name: Piontek, Janusz
name: Tomczyk, Jacek
name: Lisowska-Gaczorek, Aleksandra
name: Zalewska, Marta
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology

description: Background: Three main diagnostic types of osteoarthritic changes are distinguished in clinical and anthropological literature: osteophytes, porosity, and eburnation. The nature of the relationship between these changes and how lesions progress over time is still unclear. Aim: The aim of the present study is the analysis of the relationships between osteophytes, porosity, and eburnation based on skeletal material. Subjects and methods: The analysis employed the skeletal collection from Cedynia (199 individuals) from tenth to fourteenth-century Poland. Marginal osteophytes (OP), porosity (POR), and eburnation (EB) were examined on a shoulder, elbow, wrist, hip, knee, and ankle. Results: Osteophytes and porosity occurred independently of each other. Combinations of osteophytes and porosity (OP + POR) and osteophytes, porosity, and eburnation (OP + POR + EB) were rarely observed. Combinations of osteophytes and eburnation (OP + EB) or porosity and eburnation (POR + EB) were not found. There was a significant correlation between osteophytes and porosity in the scapula, proximal end of the ulna and proximal end of the femur. Osteophytes and eburnation were correlated at the distal end of the ulna. Porosity and eburnation were correlated at the distal end of the radius and distal end of the ulna. When all joints were considered together, all the types of osteoarthritic changes were correlated. However, the relationship between osteophytes and eburnation and between porosity and eburnation was only slightly significant. Osteophytes preceded porosity, but there were a few cases where more developed porosity accompanied less developed osteophytes. Conclusions: The findings indicate that correlations between osteoarthritic changes are weak, albeit statistically significant and further studies of the relationship between changes are necessary.
Reconstructing Effective Lagrangians Embedding Residual Family Symmetries
Creators: name: Bernigaud, Jordan
name: Varzielas, Ivo de Medeiros
name: Talbert, Jim
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider effective Lagrangians which, after electroweak- and family-symmetry breaking, yield fermionic mass matrices and/or other flavoured couplings exhibiting residual family symmetries (RFS). Thinking from the bottom up, these RFS intimately link ultraviolet (UV) Beyond-the-Standard Model (BSM) physics to infrared flavour phenomenology without direct reference to any (potentially unfalsifiable) UV dynamics. While this discussion is typically performed at the level of RFS group generators and the UV flavour groups they can close, we now also focus on the RFS-implied shape of the low-energy mass/coupling matrices. We then show how this information can be used to algorithmically guide the reconstruction of an effective Lagrangian, thereby forming top-down models realizing the typical bottom-up phenomenological conclusions. As a first application we take results from scans of finite groups capable of controlling (through their RFS) CKM or PMNS mixing within the SM alone. We then extend this to recently studied scenarios where RFS also control special patterns of leptoquark couplings, thus providing proof-in-principle completions for such `Simplified Models of Flavourful Leptoquarks.'
description: Matches published version
КОНЕЧНО-ЭЛЕМЕНТНАЯ МОДЕЛЬ ДИНАМИКИ МОРСКОГО ЛЬДА И ЕЕ ПАРАЛЛЕЛЬНАЯ РЕАЛИЗАЦИЯ С ИСПОЛЬЗОВАНИЕМ БИБЛИОТЕКИ INMOST
Creators: name: Петров Сергей Сергеевич
Publisher: name: Проблемы информатики
Year: 2021
Subjects: моделирование динамики морского льда
вязко-пластичная реология
INMOST
Ani-21). Ani-3D

description: Данная работа посвящена описанию численной реализации динамического ядра конечноэлементной модели дрейфа морского льда с учетом нелинейной вязко-пластичной реологии. Модели морского льда такого уровня являются неотъемлемой частью современных моделей динамики океана, которые используются как для краткосрочных и сезонных прогнозов погоды, так и для предсказаний изменений климата Земли. Описывается технология построения нерегулярной триангуляции для области Северного Ледовитого океана и прилегающих морей со сгущением сетки в районах с потенциально высокой концентрацией льда, у берега и в узких проливах с учетом данных о контурах материков и данных о состоянии ледового покрова. Дается описание алгоритма интерполяции геоданных в узлы модельной сетки. Во второй части работы представлена конечно-элементная реализация модели с различными схемами интегрирования по времени уравнения баланса импульса. Для интегрирования уравнений переноса массы и сплоченности льда реализована схема Тейлора-Галеркина с коррекцией потоков. Предложена оптимизация схемы интегрирования по времени уравнения баланса импульса, позволяющая ускорить стандартный стационарный mEVP-метод, применяемый в современных моделях дрейфа льда (CICE, LIM, FESIM). Идея предлагаемого нестационарного метода mEVP-opt состоит в приближении параметра итерации к локально-оптимальному, полученному из оценки шага интегрирования в приближении линеризованного оператора перехода. Представлены результаты модельного численного эксперимента по воспроизведению наиболее сложного с вычислительной точки зрения режима медленного торошения. Результаты расчетов сравниваются с результатами метода Пикара с 10 псевдоитерациями, который дает высокую точность при больших вычислительных затратах. Показано, что новый метод mEVP-opt дает существенное уменьшение времени счета по сравнению с mEVP при незначительном увеличении числа арифметических операций.
Stability of quasiperiodic superconductors
Creators: name: Ticea, Nicole Sabina
name: May-Mann, Julian
name: Xiao, Jiewen
name: Berg, Erez
name: Devakul, Trithep
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the effects of quasiperiodicity on the stability of conventional and unconventional superconductors. Quasiperiodicity is modelled using the three-dimensional Aubry-Andre model, a system in which electrons are coupled to a translation-symmetry-breaking potential that is incommensurate with the underlying lattice. Upon increasing the strength of the quasiperiodic potential, the single-particle eigenstates undergo a transition from a ballistic to a diffusive character. Here, we study the instability of the model towards superconductivity. We find that in the ballistic regime, the system is unstable towards both $s$-wave and $p$-wave superconductivity. In contrast, only the conventional $s$-wave instability survives in the intermediate diffusive regime. Our results suggest a version of Anderson's theorem for quasiperiodic systems, relating the normal state dynamics to the stability of conventional and unconventional superconductivity. These findings are relevant vis-a-vis recent studies of superconductivity in quasiperiodic moire structures.
description: 5 pages, 4 figures
The body in question : [film review of "Working Girls" directed by Lizzie Borden]
Creators: name: Aufderheide, Patricia
Publisher: name: In These Times
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Film review of "Working Girls" published in: In These Times, Apr 1, 1987, p. 21. Article is unavailable in digital format from the publisher.
РЕАЛИЗАЦИЯ И ОЦЕНКА ПРОИЗВОДИТЕЛЬНОСТИ РАЗРЕЖЕННОГО МАТРИЧНО-ВЕКТОРНОГО УМНОЖЕНИЯ МНОГОКРАТНОЙ ТОЧНОСТИ НА CUDA С ИСПОЛЬЗОВАНИЕМ СИСТЕМЫ ОСТАТОЧНЫХ КЛАССОВ
Creators: name: Крутиков Александр Константинович
name: Бабешко Иван Павлович
name: Князьков Владимир Сергеевич
name: Исупов Константин Сергеевич
Publisher: name: Проблемы информатики
Year: 2021
Subjects: разреженные матрицы
SpMV
арифметика многократной точности
система остаточных классов
программирование для графических процессоров

description: Умножение разреженной матрицы на плотный вектор (SpMV) является основным и наиболее затратным элементом в итерационных методах решения разреженных линейных систем и задач на собственные значения. Эффективная реализация SpMV имеет решающее значение для многих научных и инженерных вычислений, причем важно обеспечить не только BBicoKoe быстродействие, но и достаточную точности SpMV, поскольку итерационные методы известны своей чувствительностью к ошибкам округления. В статье мы рассматриваем параллельные реализации SpMV для CUDA-совместимых графических процессоров видеокарт (GPU) с использованием арифметики многократной точности на основе системы остаточных классов (СОК). Основным преимуществом СОК перед позиционными системами счисления является отсутствие переносов между цифрами числа, что позволяет заменить многоразрядные операции группами покомпонентных операций с цифрами небольшой разрядности, которые выполняются без накладных расходов, связанных с обработкой информации о переносах между цифрами. Мы рассматриваем реализации SpMV, основанные на двух широко распространенных форматах хранения разреженной матрицы — CSR и ELLPACK. Экспериментальная оценка с матрицами из реальных приложений показывает, что во многих случаях представленные реализации выполняются быстрее, чем реализации на основе существующих библиотек многократной точности для GPU.
MM-Newton Observations of two high redshift quasars: RX J1028-0844 and BR 0351-1034
Creators: name: Grupe, D.
name: Mathur, S.
name: Wilkes, B.
name: Elvis, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the results of XMM-Newton observations of two high redshift quasars, one radio-loud, RX J1028.6-0844 (z=4.276) and one radio-quiet, BR 0351-1034 (z=4.351). We find that the evidence for strong excess absorption towards RX J1028-0844 is marginal at best, contrary to previous claims. The superior sensitivity and broader, softer energy range of XMM-Newton (0.2-10 keV) allows better determination of spectral parameters than much deeper ASCA observations (0.8-7 keV). Our XMM-Newton observations call into question several other ASCA results of strong absorption towards high redshift radio-loud quasars. RX J1028.6-0844 occupies the same parameter space in broad band spectral properties as the low redshift BL Lac objects, showing no obvious evolution with redshift. The radio-quiet quasar BR 0351-1024 became fainter between ROSAT and XMM observations by a factor of at least 5, but with the present data we cannot determine whether there is an associated spectral change. These observations do not support previous claims of weaker X-ray emission from high redshift radio-quiet quasars. The soft X-ray spectral slope required to reconstruct the ROSAT PSPC hardness ratio of BR 0351-1034 is about alpha-X=3.5, the steepest X-ray slope ever observed in a high redshift quasar, and similar to that of low redshift Narrow Line Seyfert 1 galaxies.
description: 14 pages, 5 figures; Accepted for publication in AJ, scheduled for January 2004
Cordaites Unger 1850
Creators: name: Galtier, Jean
name: Ronchi, Ausonio
name: Broutin, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Pinopsida
Cordaitales
Cordaitaceae
Cordaites

description: Cordaites sp.   (Fig. 9E)
This radial section shows the excellent preservation of the lamina with vertical mesophyll plates separated by lacunae and palisade-like tissue in a leaf similar to the previous one.
description: Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on page 62, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948
Conversational Structure Aware and Context Sensitive Topic Model for Online Discussions
Creators: name: Sun, Yingcheng
name: Loparo, Kenneth
name: Kolacinski, Richard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Millions of online discussions are generated everyday on social media platforms. Topic modelling is an efficient way of better understanding large text datasets at scale. Conventional topic models have had limited success in online discussions, and to overcome their limitations, we use the discussion thread tree structure and propose a "popularity" metric to quantify the number of replies to a comment to extend the frequency of word occurrences, and the "transitivity" concept to characterize topic dependency among nodes in a nested discussion thread. We build a Conversational Structure Aware Topic Model (CSATM) based on popularity and transitivity to infer topics and their assignments to comments. Experiments on real forum datasets are used to demonstrate improved performance for topic extraction with six different measurements of coherence and impressive accuracy for topic assignments.
Discrete Miura Opers and Solutions of the Bethe Ansatz Equations
Creators: name: Mukhin, Evgeny
name: Varchenko, Alexander
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: Solutions of the Bethe ansatz equations associated to the XXX model of a simple Lie algebra come in families called the populations. We prove that a population is isomorphic to the flag variety of the Langlands dual Lie algebra. The proof is based on the correspondence between the solutions of the Bethe ansatz equations and special difference operators which we call the discrete Miura opers. The notion of a discrete Miura oper is one of the main results of the paper. For a discrete Miura oper D, associated to a point of a population, we show that all solutions of the difference equation DY=0 are rational functions, and the solutions can be written explicitly in terms of points composing the population.
description: Latex, 26 pages
ГИБРИДНАЯ МОДЕЛЬ МЕЛКОЙ ВОДЫ С ИСПОЛЬЗОВАНИЕМ ТЕХНОЛОГИЙ MPI-OPENMP
Creators: name: Гусев А. В.
name: Чаплыгин А. В.
Publisher: name: Проблемы информатики
Year: 2021
Subjects: параллельные вычисления
гибридные модели параллельного программирования
уравнения мелкой воды
программная архитектура

description: Гибридные модели, сочетающие в себе технологии MPI для архитектур с распределенной памятью и ОрепМР для архитектур с общей памятью, становятся все более популярными, поскольку современные высокопроизводительные вычислительные системы представляют собой набор многопроцессорных систем с общей памятью, объединенных в единую коммуникационную сеть. Создание моделей, использующих эффективно ресурсы таких вычислительных систем, является актуальной задачей на сегодняшний день. В работе представлена гибридная модель мелкой воды, являющаяся одним из основных блоков сигма-модели общей циркуляции океана INMOM. Программная архитектура модели мелкой воды построена по принципу разделения обязанностей, что позволяет выделить параллельные методы и подходы в обособленную часть программы с целью их адаптации для вычислительных систем различного типа и гибкой настройки программного комплекса на целевую вычислительную систему. В модели мелкой воды был реализован гибридный подход, при котором расчетная область разбивается на блоки малого размера, которые затем распределяются по всем доступным процессам и потокам. Распределение блоков основано на методе балансировки нагрузки с использованием кривых Гильберта, что обеспечивает равномерную вычислительную нагрузку на процессы и потоки. В работе показано преимущество этого похода в сравнении с широко распространенным векторным подходом, в котором ОрепМР используется только для распараллеливания двумерных циклов по подоблостям. Тестирование гибридной модели проводилось на кластере ИВМ РАН и суперкомпьютере МСЦ РАН. Была показана эффективность разбиения на блоки малого размера, показана эффективность гибридного подхода в сравнении с чистым MPI режимом и также продемонстрирована эффективность метода балансировки нагрузки вычислений.
CaloGraph: Graph-based diffusion model for fast shower generation in calorimeters with irregular geometry
Creators: name: Kobylianskii, Dmitrii
name: Soybelman, Nathalie
name: Dreyer, Etienne
name: Gross, Eilam
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Denoising diffusion models have gained prominence in various generative tasks, prompting their exploration for the generation of calorimeter responses. Given the computational challenges posed by detector simulations in high-energy physics experiments, the necessity to explore new machine-learning-based approaches is evident. This study introduces a novel graph-based diffusion model designed specifically for rapid calorimeter simulations. The methodology is particularly well-suited for low-granularity detectors featuring irregular geometries. We apply this model to the ATLAS dataset published in the context of the Fast Calorimeter Simulation Challenge 2022, marking the first application of a graph diffusion model in the field of particle physics.
description: 10 pages, 6 figures, 3 tables
Characterizing nonlocality of pure symmetric three-qubit states
Creators: name: Anjali, K.
name: Hejamadi, Akshata Shenoy
name: Karthik, H. S.
name: Sahu, Shradhanjali
name: Sudha
name: Devi, A. R. Usha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore nonlocality of three-qubit pure symmetric states shared between Alice, Bob and Charlie using the Clauser-Horne-Shimony-Holt (CHSH) inequality. We make use of the elegant parametrization in the canonical form of these states, proposed by Meill and Meyer (Phys. Rev. A, 96, 062310 (2017)) based on Majorana geometric representation. The reduced two-qubit states, extracted from an arbitrary pure entangled symmetric three-qubit state do not violate the CHSH inequality and hence they are CHSH-local. However, when Alice and Bob perform a CHSH test, after conditioning over measurement results of Charlie, nonlocality of the state is revealed. We have also shown that two different families of three-qubit pure symmetric states, consisting of two and three distinct spinors (qubits) respectively, can be distinguished based on the strength of violation in the conditional CHSH nonlocality test. Furthermore, we identify six of the 46 classes of tight Bell inequalities in the three-party, two-setting, two-outcome i.e., (3,2,2) scenario (Phys. Rev. A 94, 062121 (2016)). Among the two inequivalent families of three-qubit pure symmetric states, only the states belonging to three distinct spinor class show maximum violations of these six tight Bell inequalities.
description: 11 pages, 9 figures, revised version
title: A small interactive science centre as a learning environment for students with severe learning difficulties: an exploration of pedagogy
Creators: name: Brooke, Helen
Publisher: name: The Open University
Year: 2006

description: This study explores the use of a small interactive science centre as a learning environment for students with severe learning difficulties and is based on extensive video footage of nine students between the ages of six and nineteen. Participants were filmed across two academic years during visits to the science centre, and in their school or college, both in their usual classes and in follow-up sessions designed by the researcher. All participants were from educational provisions designated as being for students with severe learning difficulties. Analysis based on grounded theory strategy (Glaser and Strauss 1967, Strauss and Corbin 1998) was used to explore the complexities of a learning situation that did not appear to have been studied in this way before. Systematic coding and categorisation of video data was supplemented by semi-structured interviews with the students' teachers, using video material to stimulate recall. These interviews provided a separate viewpoint for triangulation purposes and, with the video analysis, suggested an unusually high degree of independent and focused activity on the part of the students during visits to the science centre. Results have confirmed the very high level of engagement and independent activity remarked on by the teachers, both in the science centre and when a similar environment was created in school or college. The use of grounded theory techniques has permitted the formation of hypotheses, grounded in the data, and small-scale sequential and quantitative analysis has made it possible to further explore a number of these relating to pedagogical factors within the environment; notably input mode (whether this was language-based or multi-sensory) and the importance of choice and control. Implications for debates concerning teaching methods and learning environments and indirectly for those concerning the provision of more inclusive environments are discussed.
An Additive Decomposition in S-Primitive Towers
Creators: name: Du, Hao
name: Guo, Jing
name: Li, Ziming
name: Wong, Elaine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Symbolic Computation (cs.SC)
subject: FOS: Computer and information sciences

description: We consider the additive decomposition problem in primitive towers and present an algorithm to decompose a function in an S-primitive tower as a sum of a derivative in the tower and a remainder which is minimal in some sense. Special instances of S-primitive towers include differential fields generated by finitely many logarithmic functions and logarithmic integrals. A function in an S-primitive tower is integrable in the tower if and only if the remainder is equal to zero. The additive decomposition is achieved by viewing our towers not as a traditional chain of extension fields, but rather as a direct sum of certain subrings. Furthermore, we can determine whether or not a function in an S-primitive tower has an elementary integral without solving any differential equations. We also show that a kind of S-primitive towers, known as logarithmic towers, can be embedded into a particular extension where we can obtain a finer remainder.
description: This article has been submitted to ISSAC2020 for review. Supplementary material at https://wongey.github.io/add-decomp-sprimitive/
DAIRY MARKETING AND POLICY ANALYSIS: A CRITICAL REVIEW OF RECENT EMPIRICAL STUDIES
Creators: name: Dahlgran, Roger A.
name: Dahlgran, Roger A.
Publisher: name: Unknown
Year: 1981
Subjects: subject: Agricultural and Food Policy
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: This review summarizes recent dairy marketing studies. They have been placed in one of two categories: nonpolicy research and policy research. Nonpolicy research studies are concerned with estimating a specific response. These studies are summarized to facilitate comparisons among models and resulting estimates. Policy research studies are concerned with the effects of altering policy variables or eliminating entire programs. The features of each study are explicitly stated so as to allow comparisons among the various studies.
The spatial energy spectrum of magnetic fields in our Galaxy
Creators: name: Han, J. L.
name: Ferriere, K.
name: Manchester, R. N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Interstellar magnetic fields exist over a broad range of spatial scales, extending from the large Galactic scales ($\sim 10$ kpc) down to the very small dissipative scales ($\ll 1$ pc). In this paper, we use a set of 490 pulsars distributed over roughly one third of the Galactic disk out to a radius $R \simeq 10$ kpc (assuming $R_\odot = 8.5$ kpc) and combine their observed rotation and dispersion measures with their estimated distances to derive the spatial energy spectrum of the Galactic interstellar magnetic field over the scale range $0.5 - 15$ kpc. We obtain a nearly flat spectrum, with a 1D power-law index $α=-0.37\pm0.10$ for $E_{\rm B}(k)=C k^α$ and an rms field strength of approximately $6 μ$G over the relevant scales. Our study complements the derivation of the magnetic energy spectrum over the scale range $0.03 - 100$ pc by \citet{ms96b}, showing that the magnetic spectrum becomes flatter at larger scales. This observational result is discussed in the framework of current theoretical and numerical models.
description: 7 pages, 6 figures, ApJ accepted
Determinant of Stock Price Manufacturing Company: Evidence From Indonesia
Creators: name: Medyawati, Henny
name: Yunanto, Muhamad
Publisher: name: figshare
Year: 2020
Subjects: Economics

description: One of the objectives of financial management is to maximize the value of the company. For companies that have been listed on the stock exchange, this goal can be achieved by maximizing the value of the relevant market price. The purpose of this study is to find the right model to analyze the effect of Debt to Equity Ratio (DER), Earning per share (EPS), Price to Book Value (PBV), and Return on Equity (ROE) on the stock prices of manufacturing companies included in the sector the food and beverage sub-sector of the consumer goods industry that is listed on the Indonesia Stock Exchange. Research data include the financial data for the period 2012-2018. The estimation method used is the panel data regression. The analysis shows that the most appropriate model in this research is the Random Effect Model. Variables that affect stock prices based on the model are earnings per share and price to book value.
The Future of Tilted Bianchi Universes
Creators: name: Barrow, John D.
name: Hervik, Sigbjorn
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: An asymptotic stability analysis of spatially homogeneous models of Bianchi type containing tilted perfect fluids is performed. Using the known attractors for the non-tilted Bianchi type universes, we check whether they are stable against perturbations with respect to tilted perfect fluids. We perform the analysis for all Bianchi class B models and the Bianchi type VI_0 model. In particular, we find that none of the non-tilted equilibrium points are stable against tilted perfect fluids stiffer than radiation. We also indicate parts of the phase space where new tilted exact solutions might be found.
description: 17 pages; 2 figures; v2:paragraph added
Too Much of a Good Thing: The Tipping Point of Employee Voice
Creators: name: Lam, Nancy L.
name: Arnav Sheth
Publisher: name: figshare
Year: 2020
Subjects: Economics

description: Extant voice research suggests that voice has a positive effect on organizations, which indicates that an unlimited amount of resources should be devoted to increasing employee voice. However, resources that can enable and facilitate voice - such as managerial attention and focus - can be costly to organizations. Given that there is a cost to increasing employee voice, the benefit of employee voice may not continuously justify the cost. From an interdisciplinary perspective using the Radner-Shepp-Shiryaev mathematical framework in finance, we find that employee voice is beneficial for an organization up to a point. Specifically, we find that employee voice, despite having a myriad of positive outcomes for organizations, reaches a tipping point where the cost of voice to the organization may outweigh its benefits. After this tipping point is reached, organizations do not benefit from investing to increase employee voice. The mere presence of employee voice, without regard to how much, may not be sufficient for enhanced organizational performance. Implications for this work are discussed.