cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Link auxiliary field method in the Extended Hubbard model
Creators: name: Mostovoy, Sergey
name: Pavlovsky, Oleg
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The aim of this work is to generalize the method of Hubbard fields in fermion Quantum Monte Carlo simulation to the case of link fields. The introduced Hubbard link fields play a role of the interaction fields responsible for the attraction and repulsion of electronic excitations at the nodes. Such improvements leads to a number of advantages concerning thermalization time, autocorrelations, metastable states and probability distributions of the quantities. It is demonstrated that computations using five fields are more stable and reliable in case of energy observables.
description: 11 pages, 16 figures, 1 appendix
Convex Symmetrization for Anisotropic Elliptic Equations with a lower order term
Creators: name: Piscitelli, Gianpaolo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We use "generalized" version of total variation, coarea formulas, isoperimetric inequalities to obtain sharp estimates for solutions (and for their gradients) to anisotropic elliptic equations with a lower order term, comparing them with the solutions to the convex symmetrized ones.
description: 16 pages
Bigtable Merge Compaction
Creators: name: Mathieu, Claire
name: Staelin, Carl
name: Young, Neal E.
name: Yousefi, Arman
Publisher: name: arXiv
Year: 2014
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: F.1.2; H.2.4
subject: 68W27, 68P15, 68R05

description: NoSQL databases are widely used for massive data storage and real-time web applications. Yet important aspects of these data structures are not well understood. For example, NoSQL databases write most of their data to a collection of files on disk, meanwhile periodically compacting subsets of these files. A compaction policy must choose which files to compact, and when to compact them, without knowing the future workload. Although these choices can affect computational efficiency by orders of magnitude, existing literature lacks tools for designing and analyzing online compaction policies --- policies are now chosen largely by trial and error. Here we introduce tools for the design and analysis of compaction policies for Google Bigtable, propose new policies, give average-case and worst-case competitive analyses, and present preliminary empirical benchmarks.
Degree bounds for Hopf actions on Artin-Schelter regular algebras
Creators: name: Kirkman, Ellen
name: Won, Robert
name: Zhang, James J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16E10, 16E65, 16T05, 16W22, 20J99

description: We study semisimple Hopf algebra actions on Artin-Schelter regular algebras and prove several upper bounds on the degrees of the minimal generators of the invariant subring, and on the degrees of syzygies of modules over the invariant subring. These results are analogues of results for group actions on commutative polynomial rings proved by Noether, Fogarty, Fleischmann, Derksen, Sidman, Chardin, and Symonds.
description: To appear in Advances in Mathematics
A new line-of-sight approach to the non-linear Cosmic Microwave Background
Creators: name: Fidler, Christian
name: Koyama, Kazuya
name: Pettinari, Guido W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We develop the transport operator formalism, a new line-of-sight integration framework to calculate the anisotropies of the Cosmic Microwave Background (CMB) at the linear and non-linear level. This formalism utilises a transformation operator that removes all inhomogeneous propagation effects acting on the photon distribution function, thus achieving a split between perturbative collisional effects at recombination and non-perturbative line-of-sight effects at later times. The former can be computed in the framework of standard cosmological perturbation theory with a second-order Boltzmann code such as SONG, while the latter can be treated within a separate perturbative scheme allowing the use of non-linear Newtonian potentials. We thus provide a consistent framework to compute all physical effects contained in the Boltzmann equation and to combine the standard remapping approach with Boltzmann codes at any order in perturbation theory, without assuming that all sources are localised at recombination.
description: Version published in JCAP. SONG beta is available at https://github.com/coccoinomane/song 17 pages, 1 figure
Generative Design by Reinforcement Learning: Enhancing the Diversity of Topology Optimization Designs
Creators: name: Jang, Seowoo
name: Yoo, Soyoung
name: Kang, Namwoo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Generative design refers to computational design methods that can automatically conduct design exploration under constraints defined by designers. Among many approaches, topology optimization-based generative designs aim to explore diverse topology designs, which cannot be represented by conventional parametric design approaches. Recently, data-driven topology optimization research has started to exploit artificial intelligence, such as deep learning or machine learning, to improve the capability of design exploration. This study proposes a reinforcement learning (RL) based generative design process, with reward functions maximizing the diversity of topology designs. We formulate generative design as a sequential problem of finding optimal design parameter combinations in accordance with a given reference design. Proximal Policy Optimization is used as the learning framework, which is demonstrated in the case study of an automotive wheel design problem. To reduce the heavy computational burden of the wheel topology optimization process required by our RL formulation, we approximate the optimization process with neural networks. With efficient data preprocessing/augmentation and neural architecture, the neural networks achieve a generalized performance and symmetricity-reserving characteristics. We show that RL-based generative design produces a large number of diverse designs within a short inference time by exploiting GPU in a fully automated manner. It is different from the previous approach using CPU which takes much more processing time and involving human intervention.
Chiral light amplifier with pumped Weyl semimetals
Creators: name: Nishida, Yusuke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Parallel electric and magnetic fields applied to Weyl semimetals pump axial charge via the axial anomaly until balanced by intervalley relaxation. The resulting nonequilibrium steady state exhibits the chiral magnetic effect as well as the anomalous Hall effect, which coupled with Maxwell's equations leads to unstable electromagnetic waves at low frequency and long wavelength. Here, we show that such chiral magnetic instability manifests itself as anomalous reflectance of the surface of pumped Weyl semimetal. Depending on electric, chiral magnetic, and anomalous Hall conductivities, the reflectance is found to exceed unity in a finite range of frequency for a circularly polarized light incident along the direction of Weyl node separation.
description: 5 pages, 3 figures; published version
Spectral linear matrix inequalities
Creators: name: Kummer, Mario
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Optimization and Control (math.OC)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We prove, under a certain representation theoretic assumption, that the set of real symmetric matrices, whose eigenvalues satisfy a linear matrix inequality, is itself a spectrahedron. The main application is that derivative relaxations of the positive semidefinite cone are spectrahedra. From this we further deduce statements on their Wronskians. These imply that Newton's inequalities, as well as a strengthening of the correlation inequalities for hyperbolic polynomials, can be expressed as sums of squares.
Transformative Leadership of School Administrators under the Jurisdiction of Nakhon Ratchasima Primary Educational Service Area Office, Region 1
Creators: name: Wasin Saenghuachang
Publisher: name: DR.KEN Institute of Academic Development and Promotion.
Year: 2023
Subjects: Leadership
Transformation
School Administrators

description: Interdisciplinary Academic and Research Journal, 3, 2, 215-228
Topological spectrum and perfectoid Tate rings
Creators: name: Dine, Dimitri
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 14G45, 14G22, 13J99

description: We study the topological spectrum of a seminormed ring $R$ which we define as the space of prime ideals $\mathfrak{p}$ such that $\mathfrak{p}$ equals the kernel of some bounded power-multiplicative seminorm. For any seminormed ring $R$ we show that the topological spectrum is a quasi-compact sober topological space. When $R$ is a perfectoid Tate ring we construct a natural homeomorphism between the topological spectrum of $R$ and the topological spectrum of its tilt $R^{\flat}$. As an application, we prove that a perfectoid Tate ring $R$ is an integral domain if and only if its tilt is an integral domain.
description: 38 pages; changes in the proof of Theorem 2.23, corrected typos, updated acknowledgements and references
ТЕХНОЛОГИЧЕСКИЕ АСПЕКТЫ ПРОИЗВОДСТВА ФРУКТОВЫХ ВИН С ПОВЫШЕННОЙ БИОЛОГИЧЕСКОЙ ЦЕННОСТЬЮ
Creators: name: МАКАРОВ СЕРГЕЙ СЕРГЕЕВИЧ
name: ЖИРОВ ВЛАДИМИР МИХАЙЛОВИЧ
name: ПАНАСЮК АЛЕКСАНДР ЛЬВОВИЧ
name: ПРЕСНЯКОВА ОЛЬГА ПЕТРОВНА
Publisher: name: Пиво и напитки
Year: 2018
Subjects: БИОЛОГИЧЕСКИ АКТИВНЫЕ ВЕЩЕСТВА
ВИННЫЕ ДРОЖЖИ
МАЦЕРАЦИЯ МЕЗГИ
ФРУКТОВЫЕ ВИНА

description: На современном уровне развития технологии существуют предпосылки для совершенствования процессов производства фруктовых вин с целью обогащения их биологически активными веществами сырья. Высокая концентрация веществ фенольной природы, обладающих Р-витаминной активностью, аскорбиновой кислоты и минеральных соединений в плодах малины и черной смородины позволяет рассматривать их как перспективное сырье для производства высококачественных фруктовых вин с повышенной биологической ценностью. Особое внимание при производстве таких вин необходимо уделять максимальному извлечению и сохранению ценных компонентов сырья на всех этапах технологического процесса. Цель исследований состояла в разработке технологических решений, позволяющих получить высококачественные вина из малины и черной смородины с повышенным содержанием биологически активных веществ. При приготовлении вин из малины и черной смородины исследовали влияние различных технологических приемов на этапе мацерации мезги, в процессе сбраживания сусла и при технологических обработках виноматериалов различными способами. В результате проведенного многофакторного эксперимента был разработан способ ферментативной мацерации мезги, предусматривающий применение специально подобранной мультиэнзимной композиции (МЭК) для каждого вида сырья с учетом особенностей его биохимического состава. Сделан вывод о том, что раса дрожжей в значительной степени определяет биологическую ценность и антиоксидантную активность фруктового вина. Полученные результаты показали ряд преимуществ дрожжей Saccharomyces vini при производстве вина из малины и черной смородины по сравнению с дрожжами Saccharomyces cerevisiae. По результатам проведенных исследований разработана усовершенствованная технологическая схема производства фруктовых вин из малины и черной смородины с высоким содержанием биологически активных веществ. Усовершенствованная технология предусматривает направленное регулирование биохимических процессов при мацерации сырья и его сбраживании с использованием отечественных ферментных препаратов и чистых культур дрожжей и применение оптимальных режимов технологической обработки виноматериала.
Stacking-dependent topological magnons in bilayer CrI$_3$
Creators: name: Soenen, M.
name: Bacaksiz, C.
name: Menezes, R. M.
name: Milosevic, M. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Motivated by the potential of atomically-thin magnets towards tunable high-frequency magnonics, we detail the spin-wave dispersion of bilayer CrI$_3$. We demonstrate that the magnonic behavior of the bilayer strongly depends on its stacking configuration and the interlayer magnetic ordering, where a topological bandgap opens in the dispersion caused by the Dzyaloshinskii-Moriya and Kitaev interactions, classifying bilayer CrI$_3$ as a topological magnon insulator. We further reveal that both size and topology of the bandgap in a CrI$_3$ bilayer with an antiferromagnetic interlayer ordering are tunable by an external magnetic field.
НОВЫЕ ПОДХОДЫ К ИДЕНТИФИКАЦИИ БЕЗАЛКОГОЛЬНЫХ НАПИТКОВ
Creators: name: КУЗЬМИНА ЕЛЕНА ИВАНОВНА
name: СЕВОСТЬЯНОВА ЕЛЕНА МИХАЙЛОВНА
name: ШИЛКИН АЛЕКСЕЙ АЛЕКСАНДРОВИЧ
Publisher: name: Пиво и напитки
Year: 2018
Subjects: БЕЗАЛКОГОЛЬНЫЕ НАПИТКИ
ГЕОГРАФИЧЕСКОЕ ПРОИСХОЖДЕНИЕ
ИЗОТОПНАЯ МАСС-СПЕКТРОМЕТРИЯ
ОТНОШЕНИЕ ИЗОТОПОВ КИСЛОРОДА И ВОДОРОДА

description: Разработка эффективных методов выявления фальсификатов может служить надежным заслоном для защиты потребителей от недоброкачественных безалкогольных напитков, главным образом, минеральных вод. Для решения этой задачи наиболее перспективным является масс-спектрометрический метод определения изотопного состава кислорода и водорода минеральных вод. Изотопные отношения водорода и кислорода являются единственными характеристиками вещественного состава молекул воды, позволяющими изучать их историю. Именно поэтому, определение стабильных изотопов водорода и кислорода используется при исследовании динамики природных вод, их генезиса и гидрогеохимических эффектов при взаимодействии воды и пород. Для определения подлинности сокосодержащих безалкогольных напитков ВНИИПБиВП разработан метод исследования изотопного состава органических кислот на уровне внутримолекулярных изотопных неоднородностей с получением трех значений показателя δ13С для одной молекулы органической кислоты. Использование инновационных методов определения изотопного состава позволяет дать ответы на самые различные вопросы, начиная с определения качества и состава продукта, и заканчивая установлением подлинности и определением места происхождения продукции и отдельных видов сельхозсырья.
UNDERSTANDING TEACHERS’ INSTRUCTIONAL STRATEGIES THAT APPLY REAL-WORLD PROBLEM-SOLVING IN INTEGRATED STEM EDUCATION
Creators: name: Alrashdi, Yousef Suwailem B
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 390199
subject: Curriculum and pedagogy not elsewhere classified

description: This qualitative study was conducted to understand the instructional strategies used by high school integrated STEM (iSTEM) teachers to apply real-world problem solving in their classrooms in the state of Indiana. The problem addressed by this study was the need to understand the instructional strategies employed by iSTEM teachers in their classrooms. Using a basic qualitative approach, data was collected through teacher interviews, classroom observations, and documents. The thematic analysis revealed several themes: (a) there is no single instructional strategy, but teachers adapt their strategies to the context, (b) the importance of preparation using various sources and building on student’s prior knowledge, (c) a focus on asking "why" questions as a priority, (d) the necessity of making group work tangible, (e) the use of modeling as a common strategy, including data collection and analysis, sketching and documentation, (f) the promotion of student independence by being aware and performing tasks independently, (g) the integration of real-world issues to relate learning to student lives, and (h) the challenges posed by time and diversity of student abilities. These findings suggest that iSTEM teachers should be flexible in their approach and emphasize preparation, questioning, modeling, group work, and real-world connections to improve student learning in an integrated STEM approach. The findings contribute to the existing literature on iSTEM teaching and have implications for iSTEM teachers, school administrators, and policymakers. The findings of this study can inform professional development programs for iSTEM teachers and can help school administrators design collaborative and problem-solving learning environments. Lastly, policymakers can use the findings to develop policies that promote the integration of real-world problem-solving into STEM education, thereby contributing to the development of a workforce that is prepared to meet the challenges of the 21st century.
Simple crystallizations of 4-manifolds
Creators: name: Basak, Biplab
name: Spreer, Jonathan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Geometric Topology (math.GT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 57Q15, 57Q05, 57N13, 05C15

description: Minimal crystallizations of simply connected PL 4-manifolds are very natural objects. Many of their topological features are reflected in their combinatorial structure which, in addition, is preserved under the connected sum operation. We present a minimal crystallization of the standard PL K3 surface. In combination with known results this yields minimal crystallizations of all simply connected PL 4-manifolds of "standard" type, that is, all connected sums of $\mathbb{CP}^2$, $S^2 \times S^2$, and the K3 surface. In particular, we obtain minimal crystallizations of a pair of homeomorphic but non-PL-homeomorphic 4-manifolds. In addition, we give an elementary proof that the minimal 8-vertex crystallization of $\mathbb{CP}^2$ is unique and its associated pseudotriangulation is related to the 9-vertex combinatorial triangulation of $\mathbb{CP}^2$ by the minimum of four edge contractions.
description: 23 pages, 7 figures. Minor update, replacement of Figure 7. To appear in Advances in Geometry
The regularity of projection operators and solution operators to $\overline{\partial}$ on weakly pseudoconvex domains
Creators: name: Ehsani, Dariush
Publisher: name: arXiv
Year: 2014
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32W05, 32A25

description: We relate the existence and regularity of a solution operator to on smoothly bounded pseudoconvex domains to the existence and regularity of a projection operator onto the kernel of dbar.
description: final version. to appear in Complex Var. Elliptic Equ
The Penney's Game with Group Action
Creators: name: Khovanova, Tanya
name: Li, Sean
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A15, 05E18, 00A08

description: Consider equipping an alphabet $\mathcal{A}$ with a group action that partitions the set of words into equivalence classes which we call patterns. We answer standard questions for the Penney's game on patterns and show non-transitivity for the game on patterns as the length of the pattern tends to infinity. We also analyze bounds on the pattern-based Conway leading number and expected wait time, and further explore the game under the cyclic and symmetric group actions.
description: 32 pages, 1 figure
Mean-variance hedging based on an incomplete market with external risk factors of non-Gaussian OU processes
Creators: name: Dai, Wanyang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Optimization and Control (math.OC)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Mathematics
subject: FOS: Economics and business

description: In this paper, we prove the global risk optimality of the hedging strategy of contingent claim, which is explicitly (or called semi-explicitly) constructed for an incomplete financial market with external risk factors of non-Gaussian Ornstein-Uhlenbeck (NGOU) processes. Analytical and numerical examples are both presented to illustrate the effectiveness of our optimal strategy. Our study establishes the connection between our financial system and existing general semimartingale based discussions by justifying required conditions. More precisely, there are three steps involved. First, we firmly prove the no-arbitrage condition to be true for our financial market, which is used as an assumption in existing discussions. In doing so, we explicitly construct the square-integrable density process of the variance-optimal martingale measure (VOMM). Second, we derive a backward stochastic differential equation (BSDE) with jumps for the mean-value process of a given contingent claim. The unique existence of adapted strong solution to the BSDE is proved under suitable terminal conditions including both European call and put options as special cases. Third, by combining the solution of the BSDE and the VOMM, we reach the justification of the global risk optimality for our hedging strategy.
description: 36 pages
Tailoring between network rigidity and nanosecond transient absorption in a-GexAs35-xSe65 thin films
Creators: name: Khan, Pritam
name: Saxena, Tarun
name: Adarsh, K. V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this letter, we report the first observation of dramatic decrease in nanosecond (ns) pulsed laser induced transient absorption (TA) in a-GexAs35-xSe65 thin films by tuning the amorphous network from floppy to rigid. Our results provide the direct experimental evidence of a self trapped exciton mechanism, where trapping of the excitons occurs through bond rearrangements. Taken together, a rigid amorphous network with more constraints than degrees of freedom, are unable to undergo any such bond rearrangements and results in weaker TA. However, we also demonstrate that excitation fluence can be effectively utilized as a simple tool to lift up enough constraints to introduce large TA even in rigid networks. Apart from this, we also show that TA is tunable with network rigidity as it blueshift when the mean coordination is increased from 2.35 to 2.6.
description: 5 pages, 4 figures
Arithmetic Properties of Partition Triples With Odd Parts Distinct
Creators: name: Wang, Liuquan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 05A17, Secondary 11P83

description: Let $\mathrm{pod}_{-3}(n)$ denote the number of partition triples of $n$ where the odd parts in each partition are distinct. We find many arithmetic properties of $\mathrm{pod}_{-3}(n)$ involving the following infinite family of congruences: for any integers $α\ge 1$ and $n\ge 0$, \[\mathrm{pod}_{-3}\Big({{3}^{2α+2}}n+\frac{23\times {{3}^{2α+1}}+3}{8}\Big)\equiv 0 \pmod{9}.\] We also establish some arithmetic relations between $\mathrm{pod}(n)$ and $\mathrm{pod}_{-3}(n)$, as well as some congruences for $\mathrm{pod}_{-3}(n)$ modulo 7 and 11.
description: 11 pages, please read the final version in International Journal of Number Theory
Doctoral thesis recital (viola)
Creators: name: Holmes, Kenneth (Violist)
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Suites (Viola and piano), Arranged
Sonatas (Viola and piano), Arranged

description: Divertimento (1773) / Franz Joseph Haydn -- Sonata for viola and piano in G minor, op. 19 (1901) / Sergei Rachmaninov ; trans. Vadim Borisovsky
Exploring New Physics Frontiers Through Numerical Relativity
Creators: name: Cardoso, Vitor
name: Gualtieri, Leonardo
name: Herdeiro, Carlos
name: Sperhake, Ulrich
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The demand to obtain answers to highly complex problems within strong-field gravity has been met with significant progress in the numerical solution of Einstein's equations - along with some spectacular results - in various setups. We review techniques for solving Einstein's equations in generic spacetimes, focusing on fully nonlinear evolutions but also on how to benchmark those results with perturbative approaches. The results address problems in high-energy physics, holography, mathematical physics, fundamental physics, astrophysics and cosmology.
description: 156 pages, 21 figures. Published in Living Reviews in Relativity
Repercussion of the $a_0(1710)$ [$a_0(1817)$] resonance and future developments
Creators: name: Oset, E.
name: Dai, L. R.
name: Geng, L. S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we discuss the significance and prospect for the newly discovered a0(1710)[a0(1817)] resonance state at BESIII experiment, in which they reported the observation of a scalar meson of spin-parity $J^P=0^+$ with isospin $I=1$, branded as $a_0(1817)$. This state may be the same particle as the $a_0(1710)$ observed by the BaBar experiment earlier. As early as 2008, we found that f0(1710) can be regarded as a $K^* \bar{K}^*$ molecular state based on the chiral unitary theory, and there is a partner state $a_0(1710)$ with an isospin $I=1$. Our theoretical prediction based on this picture is in good agreement with the latest BESIII data, which further supports the molecular state picture of $a_0(1710)[a_0(1817)]$. If it is indeed the isospin partner state of $f_0(1710)$, this would rule out $f_0(1710)$ as a glueball candidate. This paper briefly reviews the relevant theoretical studies and suggests new experiments to further examine the nature of $a_0(1710)[a_0(1817)]$.
description: typos corrected. 6 pages,4 figures, to be published as a "Perspective" in Science Bulletin
Underlying data: A cross-sectional study on exploring the Antecedents of Patient’s Revisit Intention: Mediating role of Trust in the Hospital among Patients in India
Creators: name: Akthar, Nahima
name: Nayak, Dr. Smitha
name: P, Dr. Yogesh Pai
Publisher: name: figshare
Year: 2022
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: The underlying data contains the complete dataset.
Lagrangian and Hamiltonian Mechanics for Probabilities on the Statistical Manifold
Creators: name: Chirco, Goffredo
name: Malagò, Luigi
name: Pistone, Giovanni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistics Theory (math.ST)
subject: Information Theory (cs.IT)
subject: High Energy Physics - Theory (hep-th)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We provide an Information-Geometric formulation of Classical Mechanics on the Riemannian manifold of probability distributions, which is an affine manifold endowed with a dually-flat connection. In a non-parametric formalism, we consider the full set of positive probability functions on a finite sample space, and we provide a specific expression for the tangent and cotangent spaces over the statistical manifold, in terms of a Hilbert bundle structure that we call the Statistical Bundle. In this setting, we compute velocities and accelerations of a one-dimensional statistical model using the canonical dual pair of parallel transports and define a coherent formalism for Lagrangian and Hamiltonian mechanics on the bundle. Finally, in a series of examples, we show how our formalism provides a consistent framework for accelerated natural gradient dynamics on the probability simplex, paving the way for direct applications in optimization, game theory and neural networks.
description: 39 pages, 5 figures; revised version published on IJGMMP
A generalized method of moments estimator for structural vector autoregressions based on higher moments
Creators: name: Keweloh, Alexander Sascha
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: structural vector autoregression
subject: independent component analysis
subject: generalized method of moments
subject: identification
subject: non-Gaussian
subject: 310
subject: 330
subject: 620

description: I propose a generalized method of moments estimator for structural vector autoregressions with non-Gaussian shocks. The shocks are identified by exploiting information contained in higher moments of the data. Extending the standard identification approach, which relies on the shocks' covariance, to the shocks' coskewness and cokurtosis allows to identify the simultaneous interaction without any further restrictions. I analyze the estimator's performance depending on the co-moments used for identification and the shocks' degree of non-Gaussianity. Using the coskewness for identification already yields reliable estimates in small samples with mildly skewed shocks while using the cokurtosis requires a large excess kurtosis and a large sample. Finally, the estimator is used in an empirical application to analyze the simultaneous interaction between oil and stock prices.
description: Discussion Paper / SFB823;36/2018
Structure and Kinematics of Sh2-138 -- A distant hub-filament system in the outer Galactic plane
Creators: name: Mallick, Kshitiz
name: Dewangan, Lokesh
name: Ojha, Devendra
name: Baug, Tapas
name: Zinchenko, Igor
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a molecular line study of the Sh2-138 (IRAS 22308+5812) hub-filament system with an aim to investigate its structure and kinematics. Archival CO molecular line data from the Canadian Galactic Plane Survey (CO(J=1-0)) for the wider region (50arcminx50arcmin) and the James Clerk Maxwell Telescope (CO(3-2), 13CO(3-2), and C18O(3-2)) for the central portion (5arcminx5arcmin) have been utilised. Analysis of the CO(1-0) spectra for the extended region in conjunction with the hub and filament identification using column density map and the getsf tool, respectively, reveals a complex structure with the spectral extraction for the central position displaying multiple velocity components. Based on the Herschel 70 micron warm dust emission, one of the filaments in the extended region was inferred to be associated with active star formation, and is host to a Bolocam 1.1 mm clump of 1606 Msun. Integrated intensity map of 13CO(3-2) emission, constructed from clumps detected at above 5sigma in position-position-velocity space, reveals three filamentary structures (labelled W-f, SW-f, and SE-f) in the central portion. Velocity gradients observed in 13CO(3-2) position-velocity slices point to longitudinal gas flow along the filaments into the central region. Filaments W-f, SW-f, and SE-f were calculated to have observed line masses of 32, 33.5, and 50 Msun/pc , respectively. The cloud was found to be dominated by supersonic and non-thermal motions, with high Mach numbers (>3) and low thermal to non-thermal pressure ratio (0.01-0.1).
description: 16 Pages, 10 Figures, Accepted for publication in The Astrophysical Journal
One-dimensional Josephson junction arrays: Lifting the Coulomb blockade by depinning
Creators: name: Vogt, Nicolas
name: Schäfer, Roland
name: Rotzinger, Hannes
name: Cui, Wanyin
name: Fiebig, Andreas
name: Shnirman, Alexander
name: Ustinov, Alexey V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Experiments with one-dimensional arrays of Josephson junctions in the regime of dominating charging energy show that the Coulomb blockade is lifted at the threshold voltage, which is proportional to the array's length and depends strongly on the Josephson energy. We explain this behavior as de-pinning of the Cooper-pair-charge-density by the applied voltage. We assume strong charge disorder and argue that physics around the de-pinning point is governed by a disordered sine-Gordon-like model. This allows us to employ the well-known theory of charge density wave de-pinning. Our model is in good agreement with the experimental data.
description: Main: 4 pages, 2 figures, Appendix: 3 pages, 4 figures
Manipulating coherence of near-field thermal radiation in time-modulated systems
Creators: name: Yu, Renwen
name: Fan, Shanhui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We show that the spatial coherence of thermal radiation can be manipulated in time-modulated photonic systems supporting surface polaritons. We develop a fluctuational electrodynamics formalism for such systems to calculate the cross-spectral density tensor of the emitted thermal electromagnetic fields in the near-field regime. Our calculations indicate that, due to time-modulation, spatial coherence can be transferred between different frequencies, and correlations between different frequency components become possible. All these effects are unique to time-modulated systems. We also show that the decay rate of optical emitters can be controlled in the proximity of such time-modulated structure. Our findings open a promising avenue toward coherence control in thermal radiation, dynamical thermal imaging, manipulating energy transfer among thermal or optical emitters, efficient near-field radiative cooling, and engineering spontaneous emission rates of molecules.
Triplet $p+ip$ paring correlation in doped Kane-Mele-Hubbard model: A quantum Monte Carlo study
Creators: name: Ma, Tianxing
name: Lin, Hai-Qing
name: Gubernatis, J. E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By using the constrained-phase quantum Monte Carlo method, we performed a systematic study of the pairing correlations in the ground state of the doped Kane-Mele-Hubbard model on a honeycomb lattice. We find that pairing correlations with $d+id$ symmetry dominate close to half filling, but pairing correlations with $p+ip$ symmetry dominate as hole doping moves the system below three-quarters filling. We correlate these behaviors of the pairing correlations with the topology of the Fermi surfaces of the non-interacting problem. We also find that the effective pairing correlation is enhanced greatly as the interaction increases, and these superconducting correlations are robust against varying the spin-orbit coupling strength. Our numerical results suggest a possible way to realize spin triplet superconductivity in doped honeycomb-like materials or ultracold atoms in optical traps.
description: 6 pages, 8 figures. Comparisons of ED, CPMC and PCPMC are added. Accepted for publication in EPL
Weakly Supervised Disentangled Generative Causal Representation Learning
Creators: name: Shen, Xinwei
name: Liu, Furui
name: Dong, Hanze
name: Lian, Qing
name: Chen, Zhitang
name: Zhang, Tong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper proposes a Disentangled gEnerative cAusal Representation (DEAR) learning method under appropriate supervised information. Unlike existing disentanglement methods that enforce independence of the latent variables, we consider the general case where the underlying factors of interests can be causally related. We show that previous methods with independent priors fail to disentangle causally related factors even under supervision. Motivated by this finding, we propose a new disentangled learning method called DEAR that enables causal controllable generation and causal representation learning. The key ingredient of this new formulation is to use a structural causal model (SCM) as the prior distribution for a bidirectional generative model. The prior is then trained jointly with a generator and an encoder using a suitable GAN algorithm incorporated with supervised information on the ground-truth factors and their underlying causal structure. We provide theoretical justification on the identifiability and asymptotic convergence of the proposed method. We conduct extensive experiments on both synthesized and real data sets to demonstrate the effectiveness of DEAR in causal controllable generation, and the benefits of the learned representations for downstream tasks in terms of sample efficiency and distributional robustness.
ИССЛЕДОВАНИЕ ВЛИЯНИЯ НОВЫХ КОМПЛЕКСНЫХ ПИЩЕВЫХ ДОБАВОК НА ИОННЫЙ СОСТАВ ВОДОК И ИХ ОРГАНОЛЕПТИЧЕСКИЕ ПОКАЗАТЕЛИ
Creators: name: ПОЛЯКОВ ВИКТОР АНТОНОВИЧ
name: АБРАМОВА ИРИНА МИХАЙЛОВНА
name: ГОЛОВАЧЕВА НАТАЛЬЯ ЕВГЕНЬЕВНА
name: МОРОЗОВА СВЕТЛАНА СЕМЕНОВНА
name: ГАЛЛЯМОВА ЛЮБОВЬ ПАВЛОВНА
name: ШУБИНА НАТАЛЬЯ АЛЕКСАНДРОВНА
Publisher: name: Пищевая промышленность
Year: 2018
Subjects: АНИОНЫ
ВОДКА
КАТИОНЫ
КОМПЛЕКСНАЯ ПИЩЕВАЯ ДОБАВКА
МАССОВАЯ КОНЦЕНТРАЦИЯ
ОРГАНОЛЕПТИЧЕСКИЕ ПОКАЗАТЕЛИ
СОРТИРОВКА
СТАБИЛЬНОСТЬ
ЩЕЛОЧНОСТЬ

description: В связи с тем, что ассортимент предлагаемых для внесения в спиртные напитки пищевых добавок находится в постоянном развитии, в институте систематически проводятся исследования возможности применения новых пищевых ингредиентов в технологии приготовления высокосортных водок. Проведено исследование влияния новых комплексных пищевых добавок на изменение органолептических, физико-химических показателей и микроэлементного состава водок при приготовлении и в процессе хранения. Установлено, что в водке с добавлением комплексных пищевых добавок «Виталайт», «Супер-Слак» и бонификатора «Углеводный модуль «Водэлпан» увеличивалась массовая концентрация уксусного альдегида, но она не превысила предельно допустимую величину для водок, приготовленных на спирте «Люкс» и не изменилась в процессе хранения. Во всех образцах водок с исследуемыми ингредиентами отмечено снижение щелочности и величины рН, в большей степени для комплексных пищевых добавок «Кедровник, «Лимонник», «Панты марала» и «Супер-Слак», что, вероятно, объясняется присутствием в их составе молочной и янтарной кислот. Анионы присутствовали в сортировках и водках в микродозах, массовая концентрация сульфатов незначительно увеличилась в водках с комплексными пищевыми добавками «Углеводный комплекс «Алко-Премиум» и «Углеводный комплекс «Виктория». Массовая концентрация катионов после внесения ингредиентов изменялась, что, очевидно, вызвано химическими процессами, происходящими между присутствующими в водно-спиртовой смеси катионами и кислотами, которые входят в состав исследуемых комплексных пищевых добавок углеводных модулей. Органолептические показатели водок улучшались, лучшие дегустационные оценки получили водки с комплексными пищевыми добавками «Лимонник», «Кедровник», «Лесные ягоды «Морошка». Повышение органолептических показателей и сохранение в процессе хранения стабильности водок свидетельствуют о перспективности применения исследуемых ингредиентов в технологии приготовления высокосортных спиртных напитков.
Double Higgs peak in the minimal SUSY B-L model
Creators: name: Abdallah, W.
name: Khalil, S.
name: Moretti, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Motivated by a $\sim 3σ$ excess recorded by the CMS experiment at the LHC around a mass of order $\sim 137$ GeV in $ZZ\to 4l$ and $γγ$ samples, we analyse the discovery potential of a second neutral Higgs boson in the Supersymmetric $B-L$ extension of the Standard Model (BLSSM) at the CERN machine. We confirm that a double Higgs peak structure can be generated in this framework, with CP-even Higgs boson masses at $\sim125$ GeV and $\sim137$ GeV, unlike the case of the Minimal Supersymmetric Standard Model (MSSM).
description: 7 pages, 4 figures. Improved discussion of experimental data
Geometric representation of two-qubit entanglement witnesses
Creators: name: Milne, Antony
name: Jennings, David
name: Rudolph, Terry
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Any two-qubit state can be represented geometrically by a steering ellipsoid inside the Bloch sphere. We extend this approach to represent any block positive two-qubit operator $B$. We derive a novel classification scheme based on the positivity of $\det B$ and $\det B^\mathrm{T_B}$; this shows that any ellipsoid inside the Bloch sphere must represent either a two-qubit state or a two-qubit entanglement witness. We focus on such witnesses and their corresponding ellipsoids, finding that properties such as witness optimality are naturally manifest in this geometric representation.
description: 8 pages, 4 figures. Published version
РАЗРАБОТКА ТЕХНОЛОГИЧЕСКИХ ПАРАМЕТРОВ ЭКСТРУЗИОННОГО ПОЛУЧЕНИЯ СНЭКОВ, ОБОГАЩЕННЫХ МИКРОБНОЙ БИОМАССОЙ
Creators: name: СЕРБА ЕЛЕНА МИХАЙЛОВНА
name: СТЕПАНОВ ВЛАДИМИР ИВАНОВИЧ
name: ШАРИКОВ АНТОН ЮРЬЕВИЧ
name: ПОЛИВАНОВСКАЯ ДАРЬЯ ВИКТОРОВНА
name: ИВАНОВ ВИКТОР ВИТАЛЬЕВИЧ
name: ИГНАТОВА НАДЕЖДА ИОСИФОВНА
Publisher: name: Пищевая промышленность
Year: 2018
Subjects: БИОХИМИЧЕСКИЙ СОСТАВ
МИКРОБНАЯ БИОМАССА
ПИЩЕКОЦЕНТРАТЫ
РЕЖИМНЫЕ ПАРАМЕТРЫ
РЕЦЕПТУРА СМЕСЕЙ
СНЭКИ
ТЕКСТУРА
ЭКСТРУЗИОННАЯ УСТАНОВКА

description: Данная статья посвящена разработке технологических параметров экструзионного получения снэков, обогащенных микробной биомассой. Целью данных исследований явилось изучение возможности переработки крахмалосодержащего сырья и обогащенных микробной биомассой и получения пищеконцентратов по экструзионной технологии. Работа выполнялась во ВНИИ пищевой биотехнологии - филиале ФГБУН «ФИЦ питания и биотехнологии». Разработаны рецептуры и созданы технологические условия экструзионного процесса получения снэков длительного хранения, обогащенных ферментализатом микробной биомассы. Также было исследовано влияние микробной биодобавки на органолептические свойства снэков, на обеспечение однородной пористой структуры с сохранением правильных форм гранул, характерных для данной пищеконцентратной продукции. С целью отработки процесса экструзии использовались регулируемые режимные параметры, такие как скорость вращения шнеков, дозирование технологической воды, производительность, что в результате позволило обеспечить устойчивые процессы экструдирования двух смесей и получения снэков с влажностью не более 10 %, что соответствует нормативам пищеконцентратной продукции длительного хранения. Определено и показано, что с увеличением до 10 % в смеси количества ферментолизата микробной биомассы, обладающей свойствами пластификатора, экструзионные пищеконцентраты приобретает лучшую структуру по однородности и форме гранул на протяжении всей выработки. В связи с этим улучшаются технологические условия получения продукции и как результат повышаются ее потребительские свойства. Пищеконцентраты, полученные на основе ферментолизатов микробной биомассы и крахмалсодержащего сырья, могут использоваться в качестве специализированных продуктов питания для восполнения дефицита рациона по белку, аминокислотам, ценным полисахаридам, витаминам и микроэлементам. Установлена принципиальная возможность получения обогащенных снеков длительного хранения, в состав которых введен ферментолизат микробной биомассы.
The 10 parsec sample in the Gaia era: first update
Creators: name: Reyle, C.
name: Jardine, K.
name: Fouque, P.
name: Caballero, J. A.
name: Smart, R. L.
name: Sozzetti, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The nearest stars provide a fundamental constraint for our understanding of stellar physics and the Galaxy. The nearby sample serves as an anchor where all objects can be studied and understood with precise data. This work is an update of the 10 pc sample published by Reylé et al. (2021) that used the unprecedented high precision parallax measurements from the early third data release of the astrometric space mission Gaia. We review this census, all updates being related to close binaries, brown dwarfs and exoplanets. We provide a new catalogue of 541 stars, brown dwarfs, and exoplanets in 336 systems within 10 pc from the Sun. This list is as volume-complete as possible from current knowledge and it provides a list of benchmark stars. We also explore the new products made available in the most recent third Gaia data release.
description: Revision of Fig 2 and 3. The catalogue is available at https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/650/A201, https://gruze.org/10pc/, https://dc.zah.uni-heidelberg.de/10pcsample/q/cone/info, and https://gucds.inaf.it/
Cosmic strings in $f\left(R,L_m\right)$ gravity
Creators: name: Harko, Tiberiu
name: Lake, Matthew J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider Kasner-type static, cylindrically symmetric interior string solutions in the $f\left(R,L_m\right)$ theory of modified gravity. The physical properties of the string are described by an anisotropic energy-momentum tensor satisfying the condition $T_t^t=T_z^z$; that is, the energy density of the string along the $z$-axis is equal to minus the string tension. As a first step in our study we obtain the gravitational field equations in the $f\left(R,L_m\right)$ theory for a general static, cylindrically symmetric metric, and then for a Kasner-type metric, in which the metric tensor components have a power law dependence on the radial coordinate $r$. String solutions in two particular modified gravity models are investigated in detail. The first is the so-called "exponential" modified gravity, in which the gravitational action is proportional to the exponential of the sum of the Ricci scalar and matter Lagrangian, and the second is the "self-consistent model", obtained by explicitly determining the gravitational action from the field equations under the assumption of a power law dependent matter Lagrangian. In each case, the thermodynamic parameters of the string, as well as the precise form of the matter Lagrangian, are explicitly obtained.
description: 20 pages, no figures. Published version