cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Superradiant many-qubit absorption refrigerator
Creators: name: Kloc, Michal
name: Meier, Kurt
name: Hadjikyriakos, Kimon
name: Schaller, Gernot
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that the lower levels of a large-spin network with a collective anti-ferromagnetic interaction and collective couplings to three reservoirs may function as a quantum absorption refrigerator. In appropriate regimes, the steady-state cooling current of this refrigerator scales quadratically with the size of the working medium, i.e., the number of spins. The same scaling is observed for the noise and the entropy production rate.
description: 7+4+2 pages, 7 figures, extended discussion (v2 suffered from omissions due to unfortunate tex errors)
Texto: A saida da pedra
Creators: name: Mỹky, Kamunu
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Kamũnũ conta em mỹky a história da saida dos humanos de dentro da pedra.
Kamũnũ tells the myth of the emergence of humankind from inside a stone.
Semidefinite Characterization and Computation of Real Radical Ideals
Creators: name: Lasserre, J. B.
name: Laurent, M.
name: Rostalski, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 14P05, 13P10 (primary), 12E12, 12D10, 90C22 (secondary)

description: For an ideal $I\subseteq\mathbb{R}[x]$ given by a set of generators, a new semidefinite characterization of its real radical $I(V_\mathbb{R}(I))$ is presented, provided it is zero-dimensional (even if $I$ is not). Moreover we propose an algorithm using numerical linear algebra and semidefinite optimization techniques, to compute all (finitely many) points of the real variety $V_\mathbb{R}(I)$ as well as a set of generators of the real radical ideal. The latter is obtained in the form of a border or Gröbner basis. The algorithm is based on moment relaxations and, in contrast to other existing methods, it exploits the real algebraic nature of the problem right from the beginning and avoids the computation of complex components.
description: 41 pages
Theory of Nonequilibrium Spin Transport and Spin Transfer Torque in Superconducting-Ferromagnetic Nanostructures
Creators: name: Zhao, Erhai
name: Sauls, J. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Spin transport currents and the spin-transfer torques in voltage-biased superconducting-ferromagnetic nanopillars (SFNFS point contacts) are computed. We develop and implement an algorithm based on the Ricatti formulation of the quasiclassical theory of superconductivity to solve the time-dependent boundary conditions for the nonequilibrium Green's functions for spin transport through the ferromagnetic interfaces. A signature of the nonequilibrium torque is a component perpendicular to the plane spanned by the two ferromagnetic moments. The perpendicular component is absent in normal-metal-ferromagnetic nanopillars (NFNFN) contacts, but is shown to have the same order of magnitude as the in-plane torque for non-equilibrium SFNFS contacts. The out-of-plane torque is due to the rotation of quasiparticle spin by the exchange fields of the ferromagnetic layers. In the ballistic limit the equilibrium torque is related to the spectrum of spin-polarized Andreev bound states, while the {\sl ac} component, for small bias voltages, is determined by the nearly adiabatic dynamics of the Andreev bound states. The nonlinear voltage dependence of the non-equilibrium torque, including the subharmonic gap structure and the high-voltage asymptotics, is attributed to the interplay between multiple Andreev reflections, spin filtering and spin mixing. These properties of spin angular momentum transport may be exploited to control the state of nanomagnets.
description: 15 pages, 14 figures
OPHIOGLOSSUM VULGATUM (POLYPODIOPSIDA, OPHIOGLOSSACEAE) В ВОЛОГОДСКОЙ ОБЛАСТИ
Creators: name: А.Н. Левашов
name: Д.А. Филиппов
Publisher: name: Фиторазнообразие Восточной Европы
Year: 2020
Subjects: редкие виды
ужовник обыкновенный
новые находки
сеточное картирование
Красная книга

description: Ophioglossum vulgatum L. (Ophioglossaceae) в 2015 г. был включён в Красную книгу Вологодской обл. (3/LC) в связи с наметившейся негативной тенденцией по сокращению числа местонахождений и численности популяций. За период с 1826 по 2020 гг. вид был отмечен в 90 локалитетах, 22 (из 26) административных районах области. Местонахождения ужовника обыкновенного попадают в границы 38 квадратов сеточного картирования, принятого в Atlas Florae Europaeae (46,9% их общего количества в регионе), причём в 14 из них вид не отмечался в последние два десятилетия, а внутри отдельных квадратов в ряде локалитетов исчез или резко снизил своё обилие в сообществах. Вид предпочитает луговые и опушечно-луговые биотопы, но зафиксированы случаи освоения им нарушенных естественных и вторичных местообитаний. В сообществах ближайшее окружение O. vulgatum формируют мхи и сосудистые растения (отмечено >200 видов). Наибольшее постоянство проявляют 37 видов травянистых и 8 видов древесных растений, но ни один из них не проявляет 100%-ное постоянство по отношению к ужовнику. Основными угрозами существования вида в таёжной зоне следует считать снижение сельскохозяйственной нагрузки на луговые биотопы и следующую за ней естественную трансформацию сообществ. Вид отмечен на территории 8 охраняемых природных территорий. К необходимым мерам охраны относится организация в местах наиболее крупных популяций O. vulgatum региональных «луговых» заказников или памятников природы (режим охраны подразумевает ежегодные умеренные сельскохозяйственные нагрузки в форме выпаса скота и сенокошения), а также мониторинг состояния известных популяций для оценки изменения их численности и поиск новых мест произрастания ужовника в регионе. Предполагаем, что наметившиеся негативные тенденции в существовании O. vulgatum в регионе сохранятся.
A short story of quantum and information thermodynamics
Creators: name: Auffèves, Alexia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This Colloquium is a fast journey through the build-up of key thermodynamical concepts, i.e. work, heat and irreversibility -- and how they relate to information. Born at the time of industrial revolution to optimize the exploitation of thermal resources, these concepts have been adapted to small systems where thermal fluctuations are predominant. Extending the framework to quantum fluctuations is a great challenge of quantum thermodynamics, that opens exciting research lines e.g. measurement fueled engines or thermodynamics of driven-dissipative systems. On a more applied side, it provides the tools to optimize the energetic consumption of future quantum computers.
description: Submitted to SciPost Lecture Notes. To appear in 'Quantum Information Machines; Lecture Notes of the Les Houches Summer School 2019', eds. M. Devoret, B. Huard, and I. Pop
Anisotropic X-ray emission in AGN accretion discs
Creators: name: Nayakshin, Sergei
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Straight-forward models of X-ray reflection in the inner region of accretion discs predict that primary X-ray flux and the flux reflected off the surface of the disc should vary together, albeit a short light travel time delay. Most of the observations, however, show that the X-ray flux can vary while the reflected features remain constant. Here we propose a simple explanation to this. In all likelihood, the emission of a moderately optically thick magnetic flare atop an accretion disc is anisotropic. A constant energy release rate in a flare will appear to produce a variable X-ray flux as the flare rotates with the accretion disc anchoring the magnetic tube. The reflector, on the other hand, receives a constant X-ray flux from the flare. Since the reflected emission is azimuthally symmetric, the observer will see a roughly constant reflected flux (neglecting relativistic effects). The model does not produce quasi-periodic oscillations (QPO) if magnetic flux tubes are sheared out faster than they complete one orbit.
description: submitted to MNRAS Letters; 3 pages
Οικονομοτεχνική Διερεύνηση Επέκτασης Προβλήτα στα πλαίσια του Νέου Προγραμματικού Σχεδίου Λιμένα Θεσσαλονίκης
Creators: name: Δάλλιος, Αναστάσιος Λαζάρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Λιμένας
Ε/Γ-Ο/Γ
Πλωτές κατασκευές
Μελέτη σκοπιμότητας
Port
Ro-Ro
Pontoons
Feasibility study

description: Αντικείμενο της παρούσας μεταπτυχιακής διπλωματικής εργασίας είναι η οικονομοτεχνική διερεύνηση επέκτασης προβλήτα για την εξυπηρέτηση Ε/Γ-Ο/Γ πλοίων (τύπου Ro-Ro) στο Λιμένα Θεσσαλονίκης. Στόχος είναι η επιλογή βέλτιστης οικονομικής αλλά και τεχνικής λύση, ενώ συγχρόνως παρουσιάζονται καινούριες κατασκευαστικές μέθοδοι και υλικά των διερευνώμενων έργων. Περιοχή μελέτης της εργασίας αποτελεί ο 3ος Προβλήτας του Λιμένα, ο οποίος αναμένεται να εξυπηρετήσει τέτοιου είδους γραμμή στο άμεσο μέλλον. Στα πλαίσια της διερεύνησης γίνεται μια εκτενής αναφορά των απαραίτητων θεωρητικών γνώσεων που απαιτούνται για τα εξυπηρετούμενα πλοία, αρχές, υλικά και κατασκευαστικές μέθοδοι πλωτών κατασκευών. Διενεργούνται οι απαραίτητοι υπολογισμοί (ακτομηχανική, διαστασιολόγηση προτεινόμενων λύσεων), σκαριφήματα των κατασκευών και ο προϋπολογισμός αυτών. Τέλος παρατίθεται η τελική κατασκευαστική λύση συνοδευόμενη από τα συμπεράσματα της διερεύνησης.
description: The subject of this postgraduate diploma thesis is the economic and technical exploration of the expansion of a pier for the servicing of Ro-Ro ships in Port of Thessaloniki. The aim is to choose the best economic and technical solution, while presenting new construction methods and materials of the investigated projects. The study area of the project is the 3rd Pier of the Port, which is expected to serve similar coastal connection in the near future. In the framework of the investigation a detailed report of the necessary theoretical knowledge required for the ships served, principles, materials and construction methods of floating structures is made. The necessary calculations (coastal engineering, dimensioning of proposed solutions), construction sketches and their budget are carried out. Finally, the final manufacturing solution is presented, accompanied by the conclusions of the investigation.
О СЕВЕРНЫХ ГРАНИЦАХ АРЕАЛОВ CAMPHOROSMA SONGORICA BUNGE (CHENOPODIACEAE ) И PHOLIURUS PANNONICUS (HOST) TRIN. (GRAMINEAE ) В БАССЕЙНЕ ХОПРА
Creators: name: Володченко Алексей Николаевич
name: Гудина Александр Николаевич
Publisher: name: Фиторазнообразие Восточной Европы
Year: 2020
Subjects: Camphorosma songorica
Pholiurus pannonicus
границы ареалов
бассейн Хопра
Тамбовская область
Саратовское Правобережье

description: Находки ранее неизвестных ценопопуляций Camphorosma songorica и Pholiurus pannonicus в 2020 г. в Тамбовской области и Саратовском Правобережье позволяют уточнить северные границы их распространения не только в бассейне Хопра, но и в средней полосе европейской части России в целом.
МЕЖДУНАРОДНАЯ ИНТЕРНЕТ-ПЛАТФОРМА INATURALIST КАК БАЗА НАБЛЮДЕНИЙ РАСТЕНИЙ КРАСНОЙ КНИГИ ТУЛЬСКОЙ ОБЛАСТИ
Creators: name: Максимова Татьяна Владимировна
name: Смирнова Елена Владимировна
name: Привалова Марина Валерьевна
name: Лакомов Александр Федорович
name: Светашева Татьяна Юрьевна
Publisher: name: Фиторазнообразие Восточной Европы
Year: 2020
Subjects: iNaturalist
любительские наблюдения
фотонаблюдения
редкие виды
Красная книга Тульской области

description: Использование современных информационных технологий и интеллектуальных интернет-ресурсов стало мощным инструментом в работе по ведению Красной книги Тульской области. В 2019–2020 гг., благодаря международному проекту гражданской науки iNaturalist, а также созданным на его платформе порталам «Флора России» и «Флора Тульской области», командой биологов и натуралистов-любителей удалось провести более 30 тысяч фотонаблюдений растений в природе. Из них 403 наблюдения отображают местонахождения 72 видов, занесенных в Красную книгу Тульской области. Находки 22 видов сделаны в местонахождениях, ранее не зарегистрированных специалистами. В статье представлены список видов с указанием количества наблюдений, а также сведения о новых местонахождениях.
Continuous Jets and Backflow Models for the Formation of W50/SS433 in Magnetohydrodynamics Simulations
Creators: name: Ohmura, Takumi
name: Ono, Kojiro
name: Sakemi, Haruka
name: Tashima, Yuta
name: Omae, Rikuto
name: Machida, Mami
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The formation mechanism of the W50/SS433 complex has long been a mystery. We propose a new scenario in which the SS433 jets themselves form the W50/SS433 system. We carry out magnetohydrodynamics simulations of two-side jet propagation using the public code CANS+. As found in previous jet studies, when the propagating jet is lighter than the surrounding medium, the shocked plasma flows back from the jet tip to the core. We find that the morphology of light jets is spheroidal at early times, and afterward, the shell and wings are developed by the broadening spherical cocoon. The morphology strongly depends on the density ratio of the injected jet to the surrounding medium. Meanwhile, the ratio of the lengths of the two-side jets depends only on the density profile of the surrounding medium. We also find that most of the jet kinetic energy is dissipated at the oblique shock formed by the interaction between the backflow and beam flow, rather than at the jet terminal shock. The position of the oblique shock is spatially consistent with the X-ray and TeV gamma-ray hotspots of W50.
description: 15 pages, 10 figures, Accepted for publication in ApJ; added reference and small corrections to text
Psychological outcomes of intellectually gifted adults in the i-Share cohort (HPi-Share)
Creators: name: Guignard, Jacques-Henri
name: Gonthier, Corentin
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: cohort
subject: giftedness

description: Analysis of secondary data from the i-Share cohort study, aiming to test whether individuals with intellectual giftedness demonstrate different psychological outcomes compared to individuals without giftedness
Additional file 1:Â of Antibiotics may increase triazine herbicide exposure risk via disturbing gut microbiota
Creators: name: Zhan, Jing
name: Liang, Yiran
name: Liu, Donghui
name: Ma, Xiaoran
name: Li, Peize
name: Liu, Chang
name: Liu, Xueke
name: Wang, Peng
name: Zhou, Zhiqiang
Publisher: name: figshare
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional Figures, tables and methods ( http://www.pantherdb.org/ ). ( https://www.lascn.com/Item/506.aspx ). (DOCX 1963â kb)
АЛЬГОФЛОРА ВОДОЕМА ОБЪЕКТА КУЛЬТУРНО-ИСТОРИЧЕСКОГО НАСЛЕДИЯ «АКСАКОВСКИЙ ПАРК» (ОРЕНБУРГСКАЯ ОБЛАСТЬ, РОССИЯ)
Creators: name: Калмыкова Ольга Геннадьевна
name: Игнатенко Марина Евгеньевна
name: Яценко-Степанова Татьяна Николаевна
Publisher: name: Фиторазнообразие Восточной Европы
Year: 2020
Subjects: альгофлора
таксономический состав
эколого-географическая характеристика
водоросли
цианобактерии

description: Объект культурно-исторического наследия «Аксаковский парк» (Оренбургская область, Россия) был выделен с целью сохранения исторических мест, связанных с именем известного писателя С.Т. Аксакова. В то же время, парк и расположенный на его территории пруд, являются особо охраняемой природной территорией. Пруд заложен в 1767–1769 гг., пережил несколько реконструкций, но с научной точки зрения никогда не изучал-ся. Для оценки его экологического состояния была исследована альгофлора водоема. Выявлено 96 видов и разно-видностей микроводорослей и цианобактерий, относящихся к 7 отделам, 10 классам, 24 порядкам, 36 семействам, 63 родам. Обнаружены 3 новых для альгофлоры Оренбургской области вида: Asterococcus superbus (Cienkowski) Scherffel, Raphidocelis danubiana (Hindák) Marvan, Komárek & Comas, Cryptoglena skujae Marin & Melkonian. Один из них (A. superbus) является редким для России. Полученные данные расширяют представления о распространения этого вида. Структурно-функциональные показатели развития альгофлоры свидетельствуют как о нарушении стабильности экосистемы, так и о процессе ускоренного эвтрофирования. Кроме того, значительное развитие Cyanobacteria представляет собой потенциальную угрозу здоровью животных и человека, использую-щих этот водоем как источник для водопоя (животные, птицы) или зону рекреации (человек).
A probabilistic formulation of evolutionary synthesis models: implications for SED fittings
Creators: name: Cervino, M.
name: Luridiana, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Evolutionary synthesis models (ESM) have been extensively used to obtain the star formation history in galaxies by means of SED fitting. Implicit in this use of ESM is that (a) for given evolutionary parameters, the shape of the SED is fixed whatever the size of the observed cluster (b) all regions of the observed SED have the same weight in the fit. However, Nature does not follow these two assumptions, as is implied by the existence of Surface Brightness Fluctuations in galaxies and as can be shown by simple logical arguments.
description: 2 pages, 2 figure, going to be published in the proceedings of the IAU Symp. 241, "Stellar Populations as Building Blocks of Galaxies"
Protoplanetary disk formation from the collapse of a prestellar core
Creators: name: Lee, Yueh-Ning
name: Charnoz, Sébastien
name: Hennebelle, Patrick
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: While it is generally accepted that the magnetic field and its non-ideal effects play important roles during the stellar formation, simple models of pure hydrodynamics and angular momentum conservation are still widely employed in the studies of disk assemblage in the framework of the so-called "alpha-disk" model due to their simplicity. There has only been a few efforts trying to bridge the gap between a collapsing prestellar core and a developed disk. The goal of the present work is to revisit the assemblage of the protoplanetary disk (PPD), by performing 3D MHD simulations with ambipolar diffusion and full radiative transfer. We follow the global evolution of the PPD from the prestellar core collapse for 100 kyr, with resolution of one AU. The formed disk is more realistic and is in agreement with recent observations of disks around class-0 young stellar objects. The mass flux arriving onto the disk and the radial mass accretion rate within the disk are measured and compared to analytical self-similar models. The surface mass flux is very centrally peaked, implying that most of the mass falling onto the star does not transit through the mid-plane of the disk. The disk mid-plane is almost dead to turbulence, whereas upper layers and the disk outer edge are very turbulent. The snow-line is significantly further away than in a passive disk. We developed a zoomed rerun technique to quickly obtain a reasonable disk that is highly stratified, weakly magnetized inside, and strongly magnetized outside. During the class-0 phase of PPD formation, the interaction between the disk and the infalling envelope is important and ought not be neglected. Accretion onto the star is found to mostly depend on dynamics of the collapsing envelope, rather than the detailed disk structure.
description: Accepted for publication in A\&A on Feb. 14th 2021
Sampling heights of second growth coastal douglas-fir in fixed area plots
Creators: name: Riel, William G.
Publisher: name: University of British Columbia
Year: 2009

description: Knowledge of tree heights is important for classifying sites, projecting growth and yield and estimating stand volume. Tree height is expensive and time consuming to measure so samples should be taken in the most efficient way possible. The impact of different sample designs and sizes on the fitting of height-diameter equations and subsequent prediction of volume is explored in this thesis. Several different height-diameter equation forms were compared for estimating height in second growth Douglas-fir. After selecting the best equation, a variety of simple sampling designs and sizes were compared using this equation. It was found that a uniform design, which was based on sampling tree height uniformly from 3 diameter classes, gave good results for height estimation. A “large” design, which concentrated 50% of its samples in the largest diameter class, gave the best estimates for tree volume. In plots less than 50 years old, it was found that sampling more than 16 tree heights produced diminishing benefits in height and volume estimates.
Berry phase effect in anomalous thermoelectric transport
Creators: name: Xiao, Di
name: Yao, Yugui
name: Fang, Zhong
name: Niu, Qian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a theory of Berry phase effect in anomalous transport in ferromagnets driven by statistical forces such as the gradient of temperature or chemical potential. Here a charge Hall current arises from the Berry phase correction to the orbital magnetization rather than from the anomalous velocity which does not exist in the absence of a mechanical force. A finite-temperature formula for the orbital magnetization is derived, which enables us to provide an explicit expression for the off-diagonal thermoelectric conductivity, to establish the Mott relation between the anomalous Nernst and Hall effects, and to reaffirm the Onsager relations between reciprocal thermoelectric conductivities. A first-principles evaluation of our expression is carried out for the material CuCr$_2$Se$_{4-x}$Br$_x$, obtaining quantitative agreement with a recent experiment.
description: Published version in PRL
Maruyoshi-Song Flows and Defect Groups of $D_p^b(G)$ Theories
Creators: name: Hosseini, Saghar S.
name: Moscrop, Robert
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the defect groups of $D_p^b(G)$ theories using geometric engineering and BPS quivers. In the simple case when $b=h^\vee (G)$, we use the BPS quivers of the theory to see that the defect group is compatible with a known Maruyoshi-Song flow. To extend to the case where $b\neq h^\vee (G)$, we use a similar Maruyoshi-Song flow to conjecture that the defect groups of $D_p^b(G)$ theories are given by those of $G^{(b)}[k]$ theories. In the cases of $G=A_n, \;E_6, \;E_8$ we cross check our result by calculating the BPS quivers of the $G^{(b)}[k]$ theories and looking at the cokernel of their intersection matrix.
description: 22 pages, v2: Added references, v3: Added references and fixed typos
Cosmic Perturbations Through the Cyclic Ages
Creators: name: Erickson, Joel K.
name: Gratton, Steven
name: Steinhardt, Paul J.
name: Turok, Neil
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze the evolution of cosmological perturbations in the cyclic model, paying particular attention to their behavior and interplay over multiple cycles. Our key results are: (1) galaxies and large scale structure present in one cycle are generated by the quantum fluctuations in the preceding cycle without interference from perturbations or structure generated in earlier cycles and without interfering with structure generated in later cycles; (2) the ekpyrotic phase, an epoch of gentle contraction with equation of state $w\gg 1$ preceding the hot big bang, makes the universe homogeneous, isotropic and flat within any given observer's horizon; and, (3) although the universe is uniform within each observer's horizon, the global structure of the cyclic universe is more complex, owing to the effects of superhorizon length perturbations, and cannot be described in a uniform Friedmann-Robertson-Walker picture. In particular, we show that the ekpyrotic phase is so effective in smoothing, flattening and isotropizing the universe within the horizon that this phase alone suffices to solve the horizon and flatness problems even without an extended period of dark energy domination (a kind of low energy inflation). Instead, the cyclic model rests on a genuinely novel, non-inflationary mechanism (ekpyrotic contraction) for resolving the classic cosmological conundrums.
description: 28 pages, 5 figures, 1 table
Stokes experiment in a liquid foam
Creators: name: Cantat, Isabelle
name: Pitois, Olivier
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The paper reports on the quasi-static steady flow of a dry liquid foam around a fixed spherical bead, few times larger than the typical bubble size. The force exerted on the bead is recorded with a precision and a time resolution large enough to show the succession of elastic loading of the foam, separated by sudden force drops. The foam structure is observed by direct light transmission, synchronized with the force measurement, thus allowing to correlate the plastic events with the force variations. Scaling laws for the force signal as a function of the bubble size are detailed and interpreted with a simple elasto-plastic model. The spatial distribution of the plasticity is strongly localized in the first bubbles layers around the bead and the average size of bubble rearrangements increases with the corresponding force jump amplitude.
The resonance peak in the electron-doped cuprate superconductors
Creators: name: Ismer, J. -P.
name: Eremin, Ilya
name: Rossi, Enrico
name: Morr, Dirk K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the emergence of a magnetic resonance in the superconducting state of the electron-doped cuprate superconductors. We show that the recently observed resonance peak in the electron-doped superconductor Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4-δ}$ is consistent with an overdamped spin exciton located near the particle-hole continuum. We present predictions for the magnetic-field dependence of the resonance mode as well as its temperature evolution in those parts of the phase diagram where $d_{x^2-y^2}$-wave superconductivity may coexist with an antiferromagnetic spin-density wave.
description: 5 Pages, 4 Figures
Understanding the Effectiveness of Reviews in E-commerce Top-N Recommendation
Creators: name: Xu, Zhichao
name: Zeng, Hansi
name: Ai, Qingyao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Modern E-commerce websites contain heterogeneous sources of information, such as numerical ratings, textual reviews and images. These information can be utilized to assist recommendation. Through textual reviews, a user explicitly express her affinity towards the item. Previous researchers found that by using the information extracted from these reviews, we can better profile the users' explicit preferences as well as the item features, leading to the improvement of recommendation performance. However, most of the previous algorithms were only utilizing the review information for explicit-feedback problem i.e. rating prediction, and when it comes to implicit-feedback ranking problem such as top-N recommendation, the usage of review information has not been fully explored. Seeing this gap, in this work, we investigate the effectiveness of textual review information for top-N recommendation under E-commerce settings. We adapt several SOTA review-based rating prediction models for top-N recommendation tasks and compare them to existing top-N recommendation models from both performance and efficiency. We find that models utilizing only review information can not achieve better performances than vanilla implicit-feedback matrix factorization method. When utilizing review information as a regularizer or auxiliary information, the performance of implicit-feedback matrix factorization method can be further improved. However, the optimal model structure to utilize textual reviews for E-commerce top-N recommendation is yet to be determined.
description: in proceedings of ICTIR 2021
The integral form of APS boundary conditions in the Bag Model
Creators: name: Abrikosov, Alexey A.
name: Wipf, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose an integral form of Atiah-Patodi-Singer spectral boundary conditions (SBC) and find explicitly the integral projector onto SBC for the 3-dimensional spherical cavity. After discussion of a simple example we argue that the relation between the projector and fermion propagator is universal and stays valid independently of the bag form and space dimension.
description: 11 pages, LateX
การประเมินมูลค่าความเต็มใจจ่ายค่ากำจัดขยะมูลฝอยจากบ้านเรือน: กรณีศึกษาอำเภอเมือง จังหวัดสงขลา
Creators: name: บุษกร ถาวรประสิทธิ์ และ ศุภวรรณ ฮ่อซี่
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: ความเต็มใจจ่าย,การกำจัดขยะมูลฝอย

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Lorentz violation and perpetual motion
Creators: name: Eling, Christopher
name: Foster, Brendan Z.
name: Jacobson, Ted
name: Wall, Aron C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that any Lorentz violating theory with two or more propagation speeds is in conflict with the generalized second law of black hole thermodynamics. We do this by identifying a classical energy-extraction method, analogous to the Penrose process, which would decrease the black hole entropy. Although the usual definitions of black hole entropy are ambiguous in this context, we require only very mild assumptions about its dependence on the mass. This extends the result found by Dubovsky and Sibiryakov, which uses the Hawking effect and applies only if the fields with different propagation speeds interact just through gravity. We also point out instabilities that could interfere with their black hole {\it perpetuum mobile}, but argue that these can be neglected if the black hole mass is sufficiently large.
description: 5 pages, 1 figure; v2. Added reference, and a remark concerning the assumption that the entropy radiated in fields responsible for Lorentz symmetry breaking is negligible
ปัจจัยทางเศรษฐกิจมหภาคที่มีผลกระทบต่อส่วนชดเชยความเสี่ยงของหุ้นสามัญกรณี ศึกษาบริษัท ปตท. สำรวจและผลิตปิโตรเลียม จำกัด(มหาชน) (ปตท.สผ.)
Creators: name: เรวัต ขันธพร
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: ส่วนชดเชยความเสี่ยง,ปัจจัยเศรษฐกิจมหภาค,หุ้นสามัญ ปตท.สผ.

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Factors influencing summer habitat use of black-tailed deer on South-Central Vancouver Island
Creators: name: Morgan, Jeff
Publisher: name: University of British Columbia
Year: 2009

description: Use of seral stage, biogeoclimatic variant, aspect and elevation by 13 radio collared black-tailed deer (Odocoileus hemionus columbianus Richardson) was examined at the ‘within home range’ level of habitat selection. Pooled data sets were evaluated for patterns of habitat use in relation to time periods within the summer of 1991. The July/August period of peak clearcut use coincided with the period of peak fireweed (Epilobium angustfolium L.) use identified by other research. The percentage of locations within clearcuts was 67.9% in April/May/June, 78.2% in July/August and 69.2% in September/October. Fireweed, an early successional forb, has been shown by other research to be the most important black-tailed deer summer forage species. Similar trends in fireweed use and the percent of locations within clearcuts therefore, were predictable. The use of Montane variants of biogeoclimatic subzones was higher in the latter portions of the summer. The percentage of locations within Montane variants was 14.5% in Aril/May, 22.6% in June/July and 25.8% in August/September. Use of Montane habitat was lowest in the spring when forage species within the Submontane were more phenologically advanced and more nutritious. Shifts in elevation and changes in the use of aspect were not detected. Parturient deer did not change their use of seral stage within the fawning period. Home range size (minimum convex polygon) was greater in the fawning period than in any other period. Increases in home range size during the fawning period were caused by increases in the magnitude and/or rate of movements to the peripheries of the home ranges. This finding supports the idea that sites on the periphery of the dam’s home range are used for fawning, and is consistent with the ‘hider strategy’ model. Hiders are known to remove their young from the birth site to prevent predators from using olfactory cues to detect their young. If black-tailed deer were to give birth within their core areas of use, they would be forced to remove their fawns from the habitats they most IDrefer. Home range size was smaller in the immediate post-fawning period than in all other periods except the pre-natal period. This behavior is again consistent with the hider strategy. Immediately after fawning, the dam must remain close to her fawns, which are sedentary. Habitat use in the early summer was more concentrated in Submontane habitats where green-up occured first. Home range size in the pre-natal period therefore, should also have been small.
Smith-Purcell radiation of a vortex electron
Creators: name: Pupasov-Maksimov, Andrey
name: Karlovets, Dmitry
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study Smith-Purcell radiation from a conducting grating generated by a vortex electron with an orbital angular momentum $\ell \hbar$, described as a generalized Laguerre-Gaussian packet, which has an intrinsic magnetic dipole moment and an electric quadrupole moment. By using a multipole expansion of the electromagnetic field of such an electron, we employ a generalized surface-current method, applicable for a wide range of parameters. The radiated energy contains contributions from the charge, from the magnetic moment, and from the electric quadrupole moment, as well as from their interference. The quadrupole contribution grows as the packet spreads while propagating, and it is enhanced for large $\ell$. In contrast to the linear growth of the radiation intensity from the charge with a number of strips $N$, the quadrupole contribution reveals an $N^3$ dependence, which puts a limit on the maximal grating length for which the radiation losses stay small. We study spectral-angular distributions of the Smith-Purcell radiation both analytically and numerically and demonstrate that the electron's vorticity can give rise to detectable effects for non-relativistic and moderately relativistic electrons. On a practical side, preparing the incoming electron's state in a form of a non-Gaussian packet with a quadrupole moment -- such as the vortex electron, an Airy beam, a Schrödinger cat state, and so on -- one can achieve quantum enhancement of the radiation power compared to the classical linear regime. Such an enhancement would be a hallmark of a previously unexplored quantum regime of radiation, in which non-Gaussianity of the packet influences the radiation properties much stronger than the quantum recoil.
On the Onset of Stochasticity in $Λ$CDM Cosmological Simulations
Creators: name: Thiebaut, Jerome
name: Pichon, Christophe
name: Sousbie, Thierry
name: Prunet, Simon
name: Pogosyan, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The onset of stochasticity is measured in $Λ$CDM cosmological simulations using a set of classical observables. It is quantified as the local derivative of the logarithm of the dispersion of a given observable (within a set of different simulations differing weakly through their initial realization), with respect to the cosmic growth factor. In an Eulerian framework, it is shown here that chaos appears at small scales, where dynamic is non-linear, while it vanishes at larger scales, allowing the computation of a critical transition scale corresponding to ~ 3.5 Mpc/h. This picture is confirmed by Lagrangian measurements which show that the distribution of substructures within clusters is partially sensitive to initial conditions, with a critical mass upper bound scaling roughly like the perturbation's amplitude to the power 0.15. The corresponding characteristic mass, $M_{\rm crit}=2 10^{13} M_{\odot}$, is roughly of the order of the critical mass of non linearities at z=1 and accounts for the decoupling induced by the dark energy triggered acceleration. The sensitivity to detailed initial conditions spills to some of the overall physical properties of the host halo (spin and velocity dispersion tensor orientation) while other "global" properties are quite robust and show no chaos (mass, spin parameter, connexity and center of mass position). This apparent discrepancy may reflect the fact that quantities which are integrals over particles rapidly average out details of difference in orbits, while the other observables are more sensitive to the detailed environment of forming halos and reflect the non-linear scale coupling characterizing the environments of halos.
description: 11 pages, 10 figures. Accepted for publication, MNRAS
Texto: A saida da pedra (curta)
Creators: name: Mỹky, Janãxi
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Janãxi conta uma versão breve em português da história da saida dos humanos de dentro da pedra.
Janãxi tells a short version in Portuguese of the myth of the emergence of humankind from inside a stone.
Semiclassical states for quantum cosmology
Creators: name: Husain, Viqar
name: Winkler, Oliver
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a metric variable based Hamiltonian quantization, we give a prescription for constructing semiclassical matter-geometry states for homogeneous and isotropic cosmological models. These "collective" states arise as infinite linear combinations of fundamental excitations in an unconventional "polymer" quantization. They satisfy a number of properties characteristic of semiclassicality, such as peaking on classical phase space configurations. We describe how these states can be used to determine quantum corrections to the classical evolution equations, and to compute the initial state of the universe by a backward time evolution.
description: 13 pages
ความวิตกกังวลตามสถานการณ์ของนักกีฬายิมนาสติก ในการแข่งชันกีฬาแห่งชาติ ครั้งที่ 39
Creators: name: สมชาย คันโททอง
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: ความวิตกกังวลตามสถานการณ์

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
การศึกษาสมรรถภาพเชิงวิชาชีพของนิสิตหลักสูตรการศึกษาบัณฑิต (กศ.บ. 5ปี) มหาวิทยาลัยศรีนครินทรวิโรฒ
Creators: name: ทิพวรรณ เดชสงค์
name: สุชาดา สุธรรมรักษ์
name: อรรณพ โพธิสุ
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: สมรรถภาพเชิงวิชาชีพ

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Extensive Benchmarking of DFT+U Calculations for Predicting Band Gaps
Creators: name: Kirchner-Hall, Nicole E.
name: Zhao, Wayne
name: Xiong, Yihuang
name: Timrov, Iurii
name: Dabo, Ismaila
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Accurate computational predictions of band gaps are of practical importance to the modeling and development of semiconductor technologies, such as (opto)electronic devices and photoelectrochemical cells. Among available electronic-structure methods, density-functional theory (DFT) with the Hubbard U correction (DFT+U) applied to band edge states is a computationally tractable approach to improve the accuracy of band gap predictions beyond that of DFT calculations based on (semi)local functionals. At variance with DFT approximations, which are not intended to describe optical band gaps and other excited-state properties, DFT+U can be interpreted as an approximate spectral-potential method when U is determined by imposing the piecewise linearity of the total energy with respect to electronic occupations in the Hubbard manifold (thus removing self-interaction errors in this subspace), thereby providing a (heuristic) justification for using DFT+U to predict band gaps. However, it is still frequent in the literature to determine the Hubbard U parameters semiempirically by tuning their values to reproduce experimental band gaps, which ultimately alters the description of other total-energy characteristics. Here, we present an extensive assessment of DFT+U band gaps computed using self-consistent ab initio U parameters obtained from density-functional perturbation theory to impose the aforementioned piecewise linearity of the total energy. The study is carried out on 20 compounds containing transition-metal or p-block (group III-IV) elements, including oxides, nitrides, sulfides, oxynitrides, and oxysulfides...
description: 22 pages, 5 figures, 6 tables
ความสามารถด้านมิติสัมพันธ์ของเด็กปฐมวัยที่ได้รับการจัดประสบการณ์การเล่น ของเล่นรูปทรงสัมพันธ์
Creators: name: มณีนุช ไวทยะชาติ เยาวพา เดชะคุปต์ และนิภา ศรีไพโรจน์
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: ความสามารถด้านมิติสัมพันธ์,การจัดประสบการณ์การเล่นของเล่นรูปทรงสัมพันธ์

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Texto: A chuva
Creators: name: Mỹky, Janãxi
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Janãxi conta algum mito sobre a chuva, e fala da preocupação dele com a demora da época da chuva.
Janãxi tells some mythical aspects of rain, and shares his preoccupation with the delay of the rainy season.
Dynamic phase-field fracture with a first-order discontinuous Galerkin method for elastic waves
Creators: name: Weinberg, Kerstin
name: Wieners, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Applied Physics (physics.app-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 74J05

description: We present a new numerical approach for wave induced dynamic fracture. The method is based on a discontinuous Galerkin approximation of the first-order hyperbolic system for elastic waves and a phase-field approximation of brittle fracture driven by the maximum tension. The algorithm is staggered in time and combines an implicit midpoint rule for the wave propagation followed by an implicit Euler step for the phase-field evolution. At fracture, the material is degraded, and the waves are reflected at the diffusive interfaces. Two and three-dimensional examples demonstrate the advantages of the proposed method for the computation of crack growth and spalling initiated by reflected and superposed waves.
description: 15 Pages, 7 figures, 41 subfigures
When renormalizability is not sufficient: Coulomb problem for vector bosons
Creators: name: Flambaum, Victor
name: Kuchiev, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The Coulomb problem for vector bosons W incorporates a known difficulty; the boson falls on the center. In QED the fermion vacuum polarization produces a barrier at small distances which solves the problem. In a renormalizable SU(2) theory containing vector triplet (W^+,W^-,gamma) and a heavy fermion doublet F with mass M the W^- falls on F^+, to distances r ~ 1/M, where M can be made arbitrary large. To prevent the collapse the theory needs additional light fermions, which switch the ultraviolet behavior of the theory from the asymptotic freedom to the Landau pole. Similar situation can take place in the Standard Model. Thus, the renormalizability of a theory is not sufficient to guarantee a reasonable behavior at small distances for non-perturbative problems, such as a bound state problem.
description: Four pages