cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Прогнозируемое и фактическое влияние голштинских быков-производителей на экстерьерные характеристики дочерей
Creators: name: И. В. Ткаченко
name: О. И. Лешонок
Publisher: name: Достижения науки и техники АПК
Year: 2020
Subjects: голштинизированный черно-пестрый скот
бык-производитель
оценка геномным методом
стандартная передающая способность (STA)
оценка по потомству
тип телосложения
экстерьер

description: Цель исследования – сравнение показателей племенной ценности быков-производителей по типу телосложения дочерей, определенной методами геномного прогноза и фактической оценки по качеству потомства. Работу проводили в 2019 г. в племенных организациях Свердловской области. Изучали конституционально-экстерьерные признаки 507 первотелок чёрно-пёстрой голштинизированной породы с кровностью по голштинской породе более 87,5 %. Коровы были потомками 7 зарубежных быков-производителей, шесть из которых относились к ветвям Блэкстара (5 быков) и Чиф Марка (1 бык) линии Р. Соверинга; один – к ветви Прелюда линии В. Айдиала. Сопоставляли значения показателей стандартной передающей способности быков (STA), рассчитанные по данным геномного тестирования применительно к референтным зарубежным популяциям, и фактической линейной оценки потомков по 9-балльной шкале. Значения от -1 до +1 по STA и от 4,8 до 5,3 баллов по 9-балльной шкале рассматривали как нейтральные. Долю признаков экстерьера рассчитывали в процентах от общего количества признаков (18), у которых фактическое и прогнозируемое направление развития совпадали. Наименьшее выявленное совпадение оценок – 31,3 %, наибольшее – 68,9 %, в среднем – 50,0 %. Самым высоким совпадением показателей STA и фактической оценки по экстерьеру отличались признаки, характеризующие вымя животного – от 2 до 6 из 7 признаков. Противоположные тенденции по геномной и фактической оценке выявлены у производителей ветви Блэкстара по росту в крестце, крепости поясницы и выраженности молочных форм. У быков-производителей других генеалогических групп несоответствие установлено по глубине туловища, положению таза, ширине задних долей вымени и высоте пятки. Для достижения более точных результатов прогнозируемой оценки племенной ценности быков-производителей необходимо создание отечественной референтной базы.
Племенная ценность быков-производителей при оценке их дочерей по продуктивному долголетию
Creators: name: В. А. Багиров
name: М. Е. Гонтов
name: Д. Н. Кольцов
name: В. И. Дмитриева
Publisher: name: Достижения науки и техники АПК
Year: 2020
Subjects: быки-производители
коровы
дочери
пожизненный удой
продуктивное долголетие
удой
сычевская порода

description: Селекционно-генетический признак длительность производственного использования животных, имея наследственную основу, в значительной степени зависит от генотипа быков. Исследования проводили с целью определения племенной ценности 18 быков-производителей, использовавшихся в стаде сычевской породы КП «Рыбковское» Смоленской области в 2000–2010 гг., по продуктивному долголетию и пожизненной продуктивности их дочерей. В обработку включили выбывших дочерей (n = 736) с подтвержденными иммуногенетической экспертизой записями происхождения. У дочерей шести быков-производителей стада Бульвар 6779, Коби 6719, Беляк 6762, Пан 6778, Блок 6772, Отсек 6639 (n = 175) возраст в лактациях достигал 7,3…8,6, пожизненная продуктивность – 33050...39568 кг молока. Это со статистически значимой разницей (p ≤ 0,001) было выше, чем у всех оцениваемых быков и показателей по стаду. По три лактации и более закончили 99 % дочерей перечисленных быков. Удой 25 тыс. кг молока и выше отмечен у 139 (79 %) их потомков, в том числе от 68 дочерей (49 %) получили по 40 т молока и более. Из числа дочерей быков Экран 6732, Зазор 6788, Финик 6797, Азарт 6800, Норд 6803, за первые три лактации выбыло соответственно 60, 47, 43, 42, 39 % коров. Продолжительность использования потомков этих быков в стаде не превышала 4,2 лактации (3,3…4,2), пожизненный удой составлял 16063…21064 кг молока. Пожизненная продуктивность 25 т молока и более отмечена только у 15…22 % их дочерей. Племенная ценность быков-производителей по пожизненной продуктивности и долголетию не зависят от уровня продуктивности дочерей за первую лактацию, коэффициент ранговой корреляции Спирмена (Рху) между величинами этих показателей был равен -0,24.
Gorenstein isolated quotient singularities over C
Creators: name: Stepanov, D. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J45

description: In this paper we review the classification of isolated quotient singularities over the field of complex numbers due to H. Zassenhaus, G. Vincent, and G. A. Wolf. As an application we describe Gorenstein isolated quotient singularities over C, generalizing a result of K. Kurano and S. Nishi.
description: 27 pages
Влияние потребления льняного жмыха на продуктивность молодняка лошадей русской тяжеловозной породы
Creators: name: А. О. Тарасова
name: С. Ф. Суханова
Publisher: name: Достижения науки и техники АПК
Year: 2020
Subjects: молодняк лошадей
рационы
льняной жмых
живая масса
промеры тела
индексы телосложения

description: Исследования проводили с целью изучения влияния различных дозировок льняного жмыха (300 и 500 г/гол в сутки в возрасте 9…12 месяцев, 600 и 800 г/гол в сутки в 12…18 месяцев) в составе рационов лошадей на живую массу, основные промеры, индексы телосложения и результаты убоя в различные возрастные периоды. Научно-хозяйственные опыты проводили в ООО «Логиново» Курганской области на молодняке лошадей русской тяжеловозной породы. В конце первого эксперимента (возраст 12 месяцев) животные в контроле уступали особям опытных групп по высоте в холке на 0,21…1,07 %, по обхвату груди – на 1,23…3,12 % (p < 0,05), по обхвату пясти – на 0,49…2,88 % (p < 0,01). Предубойная масса животных в контрольной группе была меньше, чем в экспериментальных, на 3,03…5,11 % (p < 0,05), масса охлажденной туши – на 4,71…8,02 % (p < 0,05), убойный выход – на 0,90…1,52 %. В результате скармливания льняного жмыха лошадям в возрасте 12…18 месяцев живая масса молодняка к концу эксперимента (18 месяцев) увеличивалась, по сравнению с контролем, на 4,26…5,82 % (р < 0,01). У лошадей, потреблявших экспериментальный рацион, высота в холке была больше, чем у сверстников в контроле, на 0,54…1,38 % (р < 0,05), обхват груди – на 1,20…1,26 % (p < 0,05), обхват пясти – на 1,56…2,15 %. Предубойная масса животных в контрольной группе была меньше, чем у особей в опытных группах, на 4,18…5,42 % (p < 0,05), масса охлажденной туши – на 5,46…7,81 % (p < 0,05), убойный выход – на 0,75…1,38 %. В целом наилучшие результаты по всем изучаемым показателям отмечали у животных, в рационы которых в возрасте 9…12 месяцев включали льняной жмых в дозе 500 г/гол в сутки, в 12… 18 месяцев – 800 г/гол в сутки.
Phase transitions in the three-state Ising spin-glass model with finite connectivity
Creators: name: Erichsen, R.
name: Theumann, W. K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The statistical mechanics of a two-state Ising spin-glass model with finite random connectivity, in which each site is connected to a finite number of other sites, is extended in this work within the replica technique to study the phase transitions in the three-state Ghatak-Sherrington (or random Blume-Capel) model of a spin glass with a crystal field term. The replica symmetry ansatz for the order function is expressed in terms of a two-dimensional effective-field distribution which is determined numerically by means of a population dynamics procedure. Phase diagrams are obtained exhibiting phase boundaries which have a reentrance with both a continuous and a genuine first-order transition with a discontinuity in the entropy. This may be seen as "inverse freezing", which has been studied extensively lately, as a process either with or without exchange of latent heat.
description: 10 pages, 6 figures
Viscoelasticity of 2D liquids quantified in a dusty plasma experiment
Creators: name: Feng, Yan
name: Goree, J.
name: Liu, Bin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The viscoelasticity of two-dimensional liquids is quantified in an experiment using a dusty plasma. An experimental method is demonstrated for measuring the wavenumber-dependent viscosity, $η(k)$, which is a quantitative indicator of viscoelasticity. Using an expression generalized here to include friction, $η(k)$ is computed from the transverse current autocorrelation function (TCAF), which is found by tracking random particle motion. The TCAF exhibits an oscillation that is a signature of elastic contributions to viscoelasticity. Simulations of a Yukawa liquid are consistent with the experiment.
description: 5 pages text, 3 figures, 1 supplementary material, in press Physical Review Letters 2010
Dynamics of two topologically entangled chains
Creators: name: Ferrari, F.
name: Paturej, J.
name: Piatek, M.
name: Vilgis, T. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Starting from a given topological invariant, we argue that it is possible to construct a topological field theory with a finite number of Feynman diagrams and an amplitude of gauge invariant objects that is a function of that invariant. This is for example the case of the Gauss linking number and of the abelian BF models which has been already successfully applied in the statistical mechanics of polymers. In this work it is shown that a suitable generalization of the BF model can be applied also to polymer dynamics, where the polymer trajectories are not static, but change their shape during time.
description: 8 pages, 1 figure, to appear in Jour. Math. Phys
Перспективы развития глубокой переработки зерна
Creators: name: В.А. Дегтярев
name: Л.В. Адикаева
name: Л.П. Носовская
name: В.Г. Гольдштейн
name: Н.Р. Андреев
Publisher: name: Достижения науки и техники АПК
Year: 2020
Subjects: глубокая переработка
крахмал
побочные продукты
биотехнология
зерновой рынок

description: Перспективным направлением развития агропромышленного сектора России можно считать глубокую переработку зерна. Ее интенсивное развитие обусловлено такими факторами, как зависимость от аналогичной импортируемой продукции с высокой добавленной стоимостью; возможность выхода на международные рынки при должном уровне развития производства и удовлетворении внутреннего спроса на эту продукцию, стимулирование внутреннего спроса на зерно и расширение каналов его использования; интенсификация развития животноводства путем повышения питательной ценности рационов с использованием аминокислот; наличие резервов расширения сырьевой базы зернового производства в виде неиспользуемой пашни, профицит производства зерна в некоторых регионах страны. На российском рынке востребованы мальтодекстрины, модифицированные крахмалы, глюкозно-фруктозные сиропы с различной массовой долей глюкозы, кристаллическая глюкоза для пищевой и фармацевтической промышленности, глюкозный сироп для дальнейшей переработки на кормовые аминокислоты и витаминные препараты или на продукцию зеленой химии. Развитие технологий для глубокой переработки зерна предусматривает современные методы разделения его структуры путем физико-химического и биотехнологического воздействия для последующей трансформации и обогащения конечных продуктов с высокой потребительской ценностью. Новые технологии, позволяющие модифицировать структуру и функциональные свойства клейковины открывают возможности для конкуренции в пищевой промышленности с соевыми и молочными белками. Производители пищевых продуктов в последние годы уделяют повышенное внимание гороховому крахмалу, который характеризуется более медленной скоростью переваривания и повышенным содержанием резистентной формы этого соединения, по сравнению с крахмалом зерновых культур (до 75 % против 27…35 %). Использование современных протеолитических ферментов для расщепления глютена до пептидов и аминокислот – перспективное направление производства легко усвояемых белковых продуктов. Образующиеся при этом пептиды обладают большей растворимостью, чем нерасщеплённый глютен. Их способность к образованию пены, а также удержанию ее стабильности находит применение не только в производстве продуктов питания, но и при создании упаковочных биоразлагаемых пеноматериалов.
On symmetric solutions of the fourth $q$-Painlevé equation
Creators: name: Joshi, Nalini
name: Roffelsen, Pieter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 33E17, 33D15, 34M35, 39A13, 5Q58

description: The Painlevé equations possess transcendental solutions $y(t)$ with special initial values that are symmetric under rotation or reflection in the complex $t$-plane. They correspond to monodromy problems that are explicitly solvable in terms of classical special functions. In this paper, we show the existence of such solutions for a $q$-difference Painlevé equation. We focus on symmetric solutions of a $q$-difference equation known as $q\textrm{P}_{\textrm{IV}}$ or $q{\rm P}(A_5^{(1)})$ and provide their symmetry properties and solve the corresponding monodromy problem.
description: 27 pages, 7 figures. Parts of the text on the discrete symmetries $\mathcal{T}_{\pm}$ and their relation to the symmetry group updated, emphasising that both correspond to one and the same Dynkin diagram automorphism. The title of section 5 has been changed, typos have been fixed and other minor updates
Low frequency noise characteristics of sub-micron magnetic tunnel junctions
Creators: name: Zhong, B.
name: Chen, Y.
name: Garzon, S.
name: Crawford, T. M.
name: Webb, R. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report that low frequency (up to 200 kHz) noise spectra of magnetic tunnel junctions with areas ~10^{-10}cm^2$ at 10 Kelvin deviate significantly from the typical 1/f behavior found in large area junctions at room temperature. In most cases, a Lorentzian-like shape with characteristic time between 0.1 and 10 ms is observed, which indicates only a small number of fluctuators contribute to the measured noise. By investigating the dependence of noise on both the magnitude and orientation of an applied magnetic field, we find that magnetization fluctuations in both free and reference layers are the main sources of noise in these devices. At small fields, where the noise from the free layer is dominant, a linear relation between the measured noise and angular magnetoresistance susceptibility can be established.
description: 3 pages, 2 figures
Muscle and tendon characteristics after six weeks of overloaded stretch training
Creators: name: Simpson, Carey Lynn
Publisher: name: University of British Columbia
Year: 2015

description: Stretching is used to maintain mobility, increase range of motion and rehabilitate muscles after injury. It is rarely suggested as a modality for increasing muscle size in humans, although animal studies have reported stretch induced muscle hypertrophy. The purpose of this study was to examine whether six weeks of passive stretching of the plantar flexors would stimulate muscle hypertrophy. The first hypothesis was that stretch training would induce muscle hypertrophy, increase fascicle lengths and decrease pennation angles of the medial and lateral gastrocnemius without altering the Achilles tendon, but changes in muscle architecture would be non-uniform between the gastrocnemii. The second hypothesis was stretch training would decrease maximal force and electromyography (EMG) activity of the plantar flexors through shifting the length tension relationship without changing voluntary activation or reflex activity. Eleven males stretched the non-dominant plantar flexors for six consecutive weeks by using a leg press to passively load the ball of the foot. The load was 20% of the baseline maximal voluntary contraction. EMG was monitored on-line for each session to ensure the subject was stretching and not contracting, which would be indicated by muscle activity. At week zero, three, six and one week after the completion of stretching ultrasound was used to measure muscle architectural and tendon changes. Force, EMG, twitch interpolation, reflex activity, contractile properties and body anthropometry were also measured. Both hypotheses were supported. Muscle depth increased 10.3% (p=0.04) by week three in the stretched leg with a 25% (p<0.001) increase in the length of the muscle fascicles in the muscle tendon junction, and 5.1% (p=0.01) increase in the fascicles of the muscle belly (n=3600). The pennation angle (n=3600) decreased (p=0.02) with no change in the tendon (p=0.95). Muscle force decreased 10.5% (p=0.008) at week six, with a reduction in EMG amplitude (p<0.001) and no change in voluntary activation (95.48% ± 0.92, p>0.05) or reflex activity (p>0.05). These data indicated six weeks of overloaded stretch training of the plantar flexors stimulated muscle hypertrophy but also caused significant reductions in force through an alteration in the length tension relationship.
Studying MBBS Abroad? Follow the Guide To See What to Expect
Creators: name: , Rony
Publisher: name: Zenodo
Year: 2019
Subjects: MBBS Consultant, MBBS Education Abroad, MCI Approved University, Study Abroad Consultant, Studying MBBS Abroad, Studying Overseas

description: Do you have any question such as how to study abroad, or thinking studying overseas will be a lot more costly at the same time? If this is what you are considering right now, and not acting on your dreams, then MBBS Universities Consultants will ensure that you get the best MBBS Education Abroad through their quality consultation and documentation process. So, it’s highly recommended to get over to them today since they will also be helpful and cognitively supportive. The best of everything – They are the best Study Abroad Consultant!
Polyhedral results for the Equitable Coloring Problem
Creators: name: Méndez-Díaz, Isabel
name: Nasini, Graciela
name: Severin, Daniel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: 90C27, 05C15

description: In this work we study the polytope associated with a 0/1 integer programming formulation for the Equitable Coloring Problem. We find several families of valid inequalities and derive sufficient conditions in order to be facet-defining inequalities. We also present computational evidence of the effectiveness of including these inequalities as cuts in a Branch & Cut algorithm.
Gauge/Cosmology Brane-to-Brane Duality
Creators: name: Brax, Philippe
name: Peschanski, Robi
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce a duality relation between two distinct branes, a cosmological brane with macroscopic matter and a holographic brane with microscopic gauge fields. Using brane-world cosmology with a single brane in a 5-dimensional AdS5 background, we find an explicit time-dependent holographic correspondence between the bulk metric surrounding the cosmological brane and the N=4 gauge field theory living on the boundary of the Z2-symmetric mirror bulk, identified with the holographic brane. We then relate the cosmic acceleration on the cosmological brane to the conformal anomaly of the gauge theory on the holographic brane. This leads to a dual microscopic interpretation of the number of e-foldings of the cosmological eras on the cosmological brane.
description: 21 pages, 1 figure
Синтез поперечносшитых высокозамещенных катионных крахмалов и исследование их термоокислительной стабильности в модельной среде
Creators: name: Л. Б. Кузина
name: М. Ф. Никитина
name: В. В. Литвяк
name: Н. С. Бутрим
name: Т. Д. Бильдюкевич
name: С. М. Бутрим
Publisher: name: Достижения науки и техники АПК
Year: 2020
Subjects: крахмал
катионизация
поперечное сшивание
эпихлоргидрин
триметафосфат натрия
вязкость
термоокислительная стабильность

description: Цель работы – синтез поперечносшитых высокозамещенных катионных крахмалов (картофельных и кукурузных) и исследование их термоокислительной стабильности в модельной среде для оценки возможности использования в качестве флокулянтов в буровых растворах. Получены диспергируемые в холодной воде сшитые катионные крахмалы с высокой степенью замещения (у картофельного – 0,183 моль/моль; у кукурузного – 0,174 моль/моль) и высокой вязкостью их водных дисперсий (2500…7000 мПа·с для картофельного крахмала и 2250…5500 мПа·с – для кукурузного). Термоокислительную стабильность синтезированных сшитых высокозамещенных катионных крахмалов исследовали по результатам изменения динамической вязкости водных растворов при температуре 45 °С в течение 28 дней при постоянной скорости сдвига 5,6 с–1, используя в качестве растворителя модельный раствор пресной воды (NaCl – 0,14 г/л, СaCl2 – 0,19 г/л). Условия испытания: концентрация полимера – 0,2 %; концентрация кислорода – равновесная. На первом этапе эксперимента (в течение 7 дней выдержки крахмальных растворов) происходит резкое падение динамической вязкости, по сравнению с исходной: при этом сшитый катионный картофельный крахмал теряет 10…11 % от исходной вязкости, а сшитый катионный кукурузный крахмал – 14…15 %, в зависимости от типа используемого сшивающего агента. Для несшитых катионных картофельного и кукурузного крахмалов уменьшение динамической вязкости через 7 дней хранения было значительно выше – 44,3 и 38,5 % соответственно. Наиболее устойчивыми к термоокислительной деструкции в изученных условиях оказались катионные картофельные крахмалы, сшитые эпихлоргидрином (ЭХГ) в дозах 0,5 и 1,0 %, а также – триметафосфатом натрия в дозах 0,5 и 5,0 %. По истечение 28 дней снижение динамической вязкости образцов сшитого катионного картофельного крахмала, изготовленного в присутствии указанных доз сшивающих агентов, не превысило 20 % от исходной величины.
Design of a room-temperature topological exciton-polariton laser in a ZnO/TiO$_2$-photonic crystal slab
Creators: name: Septembre, I.
name: Leblanc, C.
name: Hermet, L.
name: Nguyen, H. S.
name: Letartre, X.
name: Solnyshkov, D. D.
name: Malpuech, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose theoretically a scheme to get a room-temperature 2D topological exciton-polariton laser with propagating topological lasing modes. The structure uses guided modes in a photonic crystal slab. A ZnO layer provides strong excitonic resonances stable at room temperature. It is capped by a TiO$_2$ layer pierced by a triangular lattice. The exciton-polariton modes of the 3D structure are computed by solving numerically Maxwell's equations including the excitonic response. The designed triangular lattice shows a transverse electric gap. The triangular lattice is shown to be the limit of a staggered honeycomb lattice when one of the sub-lattices vanishes. Its topology can be characterized by symmetry indicators. The interface between two shifted triangular lattices supports two counter-propagating modes lying in the gap of the bulk modes. The interface states are analogous to quantum pseudospin Hall interface states. These modes show orthogonal polarizations. They can be selectively excited using polarized excitation and are well-protected from back-scattering. These modes can benefit from the exciton-polariton gain at room temperature because of their sufficiently large exciton fraction and favorable position in energy. The strong localization of these propagating modes makes them suitable to host topological lasing triggered by a non-resonant pump localized on the interface.
On the growth rate of polyregular functions
Creators: name: Bojańczyk, Mikołaj
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: We consider polyregular functions, which are certain string-to-string functions that have polynomial output size. We prove that a polyregular function has output size $\mathcal O(n^k)$ if and only if it can be defined by an MSO interpretation of dimension $k$, i.e. a string-to-string transformation where every output position is interpreted, using monadic second-order logic MSO, in some $k$-tuple of input positions. We also show that this characterization does not extend to pebble transducers, another model for describing polyregular functions: we show that for every $k \in \{1,2,\ldots\}$ there is a polyregular function of quadratic output size which needs at least $k$ pebbles to be computed.
description: Author version of LICS 23 paper
From quantity to quality in open access: (and what about) the OA publishers' role?
Creators: name: Bosman, Jeroen
name: De Jonge, Hans
name: Kramer, Bianca
name: Sondervan, Jeroen
Publisher: name: Zenodo
Year: 2021
Subjects: Open Access
The Netherlands
Quality of Open Access
Policies
Universities
Funding organisations

description: We suggest to broaden and deepen the open access agenda by including several open access characteristics: more document types, retrospectivity, immediacy, open licenses, open metadata, open peer review, alternative platforms and diamond open access. To facilitate discussion, a framework is proposed that allows specifying these actions by the a) aspects of open access they address (what is made open access, how/when/where it is made open access, and copyright and rights retention), b) the actors that play a role (government, research institutions, funders), and c) the various levels at which these actions can be taken: state as goal, set as policy, legalize and promote, recognize and reward, finance, support with infrastructure. A template is provided to ease the use of the framework. As important actors publishers could help this agenda in several ways
The Contributions of Interactive Binary Stars to Double Main Sequence Turn-Offs and Dual Red Clump of Intermediate-Age Star Clusters
Creators: name: Yang, Wuming
name: Meng, Xiangcun
name: Bi, Shaolan
name: Tian, Zhijia
name: Li, Tanda
name: Liu, Kang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Double or extended main-sequence turn-offs (DMSTOs) and dual red clump (RC) were observed in intermediate-age clusters, such as in NGC 1846 and 419. the DMSTOs are interpreted as that the cluster has two distinct stellar popula- tions with differences in age of about 200-300 Myr but with the same metallicity. The dual RC is interpreted as a result of a prolonged star formation. Using a stellar population-synthesis method, we calculated the evolutions of binary-star stellar population (BSP). We found that binary interactions and merging can reproduce the dual RC in the color-magnitude diagrams of an intermediate-age cluster, whereas in actuality only a single population exists. Moreover, the binary interactions can lead to an extended MSTO rather than DMSTOs. However, the rest of main sequence, subgiant branch and first giant branch are hardly spread by the binary interactions. Part of the observed dual RC and extended MSTO may be the results of binary interactions and merger.
description: 10 pages, 2 figures; accepted by ApJL
Schur function expansions of KP tau functions associated to algebraic curves
Creators: name: Enolski, V.
name: Harnad, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 14H70, 14H42, 14K25, 32G81

description: The Schur function expansion of Sato-Segal-Wilson KP tau-functions is reviewed. The case of tau-functions related to algebraic curves of arbitrary genus is studied in detail. Explicit expressions for the Plücker coordinate coefficients appearing in the expansion are obtained in terms of directional derivatives of the Riemann theta function or Klein sigma function along the KP flow directions. Using the fundamental bi-differential, it is shown how the coefficients can be expressed as polynomials in terms of Klein's higher genus generalizations of Weierstrass' zeta and P functions. The cases of genus two hyperelliptic and genus three trigonal curves are detailed as illustrations of the approach developed here.
description: 48 pages
The spine of a Fourier-Stieltjes algebra: corrigenda
Creators: name: Ilie, Monica
name: Spronk, Nico
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 43A30, 43A60, 43A07, 46L07, 22B05

description: Some unfortunate errors from our paper math/0505591 are corrected.
description: 6 pages
Semiparametric inference in mixture models with predictive recursion marginal likelihood
Creators: name: Martin, Ryan
name: Tokdar, Surya T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Methodology (stat.ME)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Predictive recursion is an accurate and computationally efficient algorithm for nonparametric estimation of mixing densities in mixture models. In semiparametric mixture models, however, the algorithm fails to account for any uncertainty in the additional unknown structural parameter. As an alternative to existing profile likelihood methods, we treat predictive recursion as a filter approximation to fitting a fully Bayes model, whereby an approximate marginal likelihood of the structural parameter emerges and can be used for inference. We call this the predictive recursion marginal likelihood. Convergence properties of predictive recursion under model mis-specification also lead to an attractive construction of this new procedure. We show pointwise convergence of a normalized version of this marginal likelihood function. Simulations compare the performance of this new marginal likelihood approach that of existing profile likelihood methods as well as Dirichlet process mixtures in density estimation. Mixed-effects models and an empirical Bayes multiple testing application in time series analysis are also considered.
Effects of Lorentz Symmetry Breaking Environment on Generalized Relativistic Quantum Oscillator Field
Creators: name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study the generalized Klein-Gordon oscillator equation under the effects of the violation of Lorentz Symmetry defined by a tensor field $(K_F)_{μναβ}$ out of the Standard Model Extension (SME). We consider a possible scenario of the Lorentz-Violating effects with a Cornell-type electric field and a linear magnetic field that contributes a harmonic-type central potential in the relativistic quantum motions of scalar oscillator fields. The bound-states solutions of the wave equation using the parametric Nikiforov-Uvarov method by considering a Coulomb and Cornell-type potential form functions are obtained. We see that the eigenvalue solutions get modified by the Lorentz symmetry-breaking effects in comparison to the Landau levels (without Lorentz-Violation effects in flat space)
description: 13 pages; accepted for the publication in Canadian Journal of Physics
A tabletop x-ray tomography instrument for nanometer-scale imaging: demonstration of the 1,000-element transition-edge sensor subarray
Creators: name: Szypryt, Paul
name: Nakamura, Nathan
name: Becker, Daniel T.
name: Bennett, Douglas A.
name: Dagel, Amber L.
name: Doriese, W. Bertrand
name: Fowler, Joseph W.
name: Gard, Johnathon D.
name: Harris, J. Zachariah
name: Hilton, Gene C.
name: Imrek, Jozsef
name: Jimenez, Edward S.
name: Larson, Kurt W.
name: Levine, Zachary H.
name: Mates, John A. B.
name: McArthur, D.
name: Miaja-Avila, Luis
name: Morgan, Kelsey M.
name: O'Neil, Galen C.
name: Ortiz, Nathan J.
name: Pappas, Christine G.
name: Schmidt, Daniel R.
name: Thompson, Kyle R.
name: Ullom, Joel N.
name: Vale, Leila
name: Vissers, Michael R.
name: Walker, Christopher
name: Weber, Joel C.
name: Wessels, Abigail L.
name: Wheeler, Jason W.
name: Swetz, Daniel S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report on the 1,000-element transition-edge sensor (TES) x-ray spectrometer implementation of the TOMographic Circuit Analysis Tool (TOMCAT). TOMCAT combines a high spatial resolution scanning electron microscope (SEM) with a highly efficient and pixelated TES spectrometer to reconstruct three-dimensional maps of nanoscale integrated circuits (ICs). A 240-pixel prototype spectrometer was recently used to reconstruct ICs at the 130 nm technology node, but to increase imaging speed to more practical levels, the detector efficiency needs to be improved. For this reason, we are building a spectrometer that will eventually contain 3,000 TES microcalorimeters read out with microwave superconducting quantum interference device (SQUID) multiplexing, and we currently have commissioned a 1,000 TES subarray. This still represents a significant improvement from the 240-pixel system and allows us to begin characterizing the full spectrometer performance. Of the 992 maximimum available readout channels, we have yielded 818 devices, representing the largest number of TES x-ray microcalorimeters simultaneously read out to date. These microcalorimeters have been optimized for pulse speed rather than purely energy resolution, and we measure a FWHM energy resolution of 14 eV at the 8.0 keV Cu K$α$ line.
description: 5 pages, 4 figures, submitted to IEEE Transactions on Applied Superconductivity
Unconventional proximity effect and inverse spin-switch behavior in a model manganite-cuprate-manganite trilayer system
Creators: name: Salafranca, Juan
name: Okamoto, Satoshi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The proximity effect in a model manganite-cuprate system is investigated theoretically. We consider a situation in which spin-polarized electrons in manganite layers antiferromagnetically couple with electrons in cuprate layers as observed experimentally. The effect of the interfacial magnetic coupling is found to be much stronger than the injection of spin-polarized electrons into the cuprate region. As a result, the superconducting transition temperature depends on the thickness of the cuprate layer significantly. Since the magnetic coupling creates {\em negative} spin polarization, an applied magnetic field and the negative polarization compete resulting in the inverse spin-switch behavior where the superconducting transition temperature is increased by applying a magnetic field.
description: Accepted in PRL
PIC Simulations of the Temperature Anisotropy-Driven Weibel Instability: Analyzing the perpendicular mode
Creators: name: Stockem, A
name: Dieckmann, M E
name: Schlickeiser, R
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: An instability driven by the thermal anisotropy of a single electron species is investigated in a 2D particle-in-cell (PIC) simulation. This instability is the one considered by Weibel and it differs from the beam driven filamentation instability. A comparison of the simulation results with analytic theory provides similar exponential growth rates of the magnetic field during the linear growth phase of the instability. We observe in accordance with previous works the growth of electric fields during the saturation phase of the instability. Some components of this electric field are not accounted for by the linearized theory. A single-fluid-based theory is used to determine the source of this nonlinear electric field. It is demonstrated that the magnetic stress tensor, which vanishes in a 1D geometry, is more important in this 2-dimensional model used here. The electric field grows to an amplitude, which yields a force on the electrons that is comparable to the magnetic one. The peak energy density of each magnetic field component in the simulation plane agrees with previous estimates. Eddy currents develop, which let the amplitude of the third magnetic field component grow, which is not observed in a 1D simulation.
description: accepted by Plasma Physics and Controlled Fusion
CtrSVDD: A Benchmark Dataset and Baseline Analysis for Controlled Singing Voice Deepfake Detection
Creators: name: Zang, Yongyi
name: Shi, Jiatong
name: Zhang, You
name: Yamamoto, Ryuichi
name: Han, Jionghao
name: Tang, Yuxun
name: Xu, Shengyuan
name: Zhao, Wenxiao
name: Guo, Jing
name: Toda, Tomoki
name: Duan, Zhiyao
Publisher: name: arXiv
Year: 2024
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Multimedia (cs.MM)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Recent singing voice synthesis and conversion advancements necessitate robust singing voice deepfake detection (SVDD) models. Current SVDD datasets face challenges due to limited controllability, diversity in deepfake methods, and licensing restrictions. Addressing these gaps, we introduce CtrSVDD, a large-scale, diverse collection of bonafide and deepfake singing vocals. These vocals are synthesized using state-of-the-art methods from publicly accessible singing voice datasets. CtrSVDD includes 47.64 hours of bonafide and 260.34 hours of deepfake singing vocals, spanning 14 deepfake methods and involving 164 singer identities. We also present a baseline system with flexible front-end features, evaluated against a structured train/dev/eval split. The experiments show the importance of feature selection and highlight a need for generalization towards deepfake methods that deviate further from training distribution. The CtrSVDD dataset and baselines are publicly accessible.
description: Accepted by Interspeech 2024
Polar modes and isospectrality of Ellis-Bronnikov wormholes
Creators: name: Azad, Bahareh
name: Blázquez-Salcedo, Jose Luis
name: Chew, Xiao Yan
name: Kunz, Jutta
name: Yeom, Dong-han
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider polar perturbations of static Ellis-Bronnikov wormholes and derive the coupled set of perturbation equations for the gravitational and the scalar field. For massless wormholes the perturbations decouple, and we obtain two identical master equations for the scalar and gravitational modes, which moreover agree with the master equation for the axial modes. Consequently there is isospectrality with threefold degenerate modes. For a finite mass of the background wormhole solutions, the equations are coupled. We then obtain two distinct branches of polar quasinormal modes for a given multipole number l, associated with the presence of the two types of fields. We calculate the quasi-normal mode frequencies and decay rates for the branches with l=2, 3 and 4. For a given l the real frequencies of the two branchesget the closer, the higher the multipole number gets.
description: 22 pages, 7 figures
Environmental citizenship in Chilean school textbooks : a case study on environmental citizenship education in Chilean basic-education textbooks of 2012
Creators: name: Acuna, Victor
Publisher: name: University of British Columbia
Year: 2015

description: The role of education in the formation of citizens, particularly from the perspective of sustainable development, has strongly influenced the Chilean environmental-education curriculum since Chile’s educational reform of the 1990s. The school textbooks provided by the Chilean Ministry of Education (MINEDUC) are an important resource for teachers and students in Chilean public and private-subsidized education. This study explores how Chilean school textbooks for basic-education (elementary years) appear to convey relationships between citizens and the environment. Apart from the Chilean context, similar studies have focused on identifying conceptions and social representations of the environment and the human-environment relationship among students, teachers, curricula, and textbooks. In this study, I specifically explore school textbooks and focus the inquiry on three aspects that appear to link environmental citizenship, sustainability, and education: awareness, values, and civic action. For the purpose of this interpretive study, I conducted a qualitative content analysis to examine the text and images in school textbooks for grades one, four, and eight for two compulsory subjects in Chile: Natural Science and History, Geography, and Social Science. These textbooks seem to represent civic-environmental relationships generally at local and national scales. The textbooks also appear to encourage environmental care mainly as an individual or personal duty and scientific attitudes, skills, and knowledge focusing mostly on material and practical aspects of the human-environmental system. The results of this study intend to advance our knowledge and understanding of how Chilean textbooks for the public and private-subsidized educational systems represent citizen-environment relationships. These representations appear to disconnect humans from dimensions that regard the environment symbolically and promote collective deliberation and participation. This study may guide interested ministries of education and publishers in the production of future school textbooks that may better foster sustainable and participative relationships between citizens and the environment.
Reactive force field for lithium-aluminum silicates with applications to eucryptite phases
Creators: name: Narayanan, Badri
name: van Duin, Adri C. T.
name: Kappes, Branden B.
name: Reimanis, Ivar E.
name: Ciobanu, Cristian V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have parameterized a reactive force field (ReaxFF) for lithium aluminum silicates using density functional theory (DFT) calculations of structural properties of a number of bulk phase oxides, silicates, and aluminates, as well as of several representative clusters. The force field parameters optimized in this study were found to predict lattice parameters and heats of formation of selected condensed phases in excellent agreement with previous DFT calculations and with experiments. We have used the newly developed force-field to study the eucryptite phases in terms of their thermodynamic stability and their elastic properties. We have found that (a) these ReaxFF parameters predict the correct order of stability of the three crystalline polymorphs of eucryptite, α, β, and γ, and (b) that upon indentation, a new phase appears at applied pressures \geq 7 GPa. The high pressure phase obtained upon indentation is amorphous, as illustrated by the radial distribution functions calculated for different pairs of elements. In terms of elastic properties analysis, we have determined the elements of the stiffness tensor for α- and β- eucryptite at the level of ReaxFF, and discussed the elastic anisotropy of these two polymorphs. Polycrystalline average properties of these eucryptite phases are also reported to serve as ReaxFF predictions of their elastic moduli (in the case of α-eucryptite), or as tests against values known from experiments or DFT calculations (β- eucrypite). The ReaxFF potential reported here can also describe well single-species systems (e.g., Li-metal, Al-metal, and condensed phases of silicon), which makes it suitable for investigating struc- ture and properties of suboxides, atomic-scale mechanisms responsible for phase transformations, as well as oxidation-reduction reactions.
description: 15 pages
Anatomy of ultrafast quantitative magneto-acoustics in freestanding nickel thin films
Creators: name: Ghita, Antonia
name: Mocioi, Tudor-Gabriel
name: Lomonosov, Alexey M.
name: Kim, Jiwan
name: Kovalenko, Oleksandr
name: Vavassori, Paolo
name: Temnov, Vasily V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We revisit the quantitative analysis of the ultrafast magneto-acoustic experiment in a freestanding nickel thin film by Kim and Bigot [1] by applying our recently proposed approach of magnetic and acoustic eigenmodes decomposition by Vernik et al. [2]. We show that the application of our modeling to the analysis of time-resolved reflectivity measurements allows for the determination of amplitudes and lifetimes of standing perpendicular acoustic phonon resonances with unprecedented accuracy. The acoustic damping is found to scale as $\proptoω^2$ for frequencies up to 80~GHz and the peak amplitudes reach $10^{-3}$. The experimentally measured magnetization dynamics for different orientations of an external magnetic field agrees well with numerical solutions of magneto-elastically driven magnon harmonic oscillators. Symmetry-based selection rules for magnon-phonon interactions predicted by our modeling approach allow for the unambiguous discrimination between spatially uniform and non-uniform modes, as confirmed by comparing the resonantly enhanced magneto-elastic dynamics simultaneously measured on opposite sides of the film. Moreover, the separation of time scales for (early) rising and (late) decreasing precession amplitudes provide access to magnetic (Gilbert) and acoustic damping parameters in a single measurement.
description: 9 pages, 7 figures
Boundedness in a taxis-consumption system involving signal-dependent motilities and concurrent enhancement of density-determined diffusion and cross-diffusion
Creators: name: Li, Genglin
name: Wang, Liangchen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: (2020): 35K65(primary), 35K51, 35Q92, 92C17, 35K55, 35K57(secondary)

description: This paper is concerned with the migration-consumption taxis system involving signal-dependent motilities $$\left\{ \begin{array}{l} u_t = Δ\big(u^mϕ(v)\big), \\[1mm] v_t = Δv-uv, \end{array} \right. \qquad \qquad (\star)$$ in smoothly bounded domains $Ω\subset\mathbb{R}^n$, where $m>1$ and $n\ge2$. It is shown that if $ϕ\in C^3([0,\infty))$ is strictly positive on $[0,\infty)$, for all suitably regular initial data an associated no-flux type initial-boundary value problem possesses a globally defined bounded weak solution, provided $m>\frac{n}{2}$, which is consistent with the restriction imposed on $m$ in corresponding signal production counterparts of $(\star)$ so as to establish the similar result.
description: 19 pages, 0 figures