cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A New Clustering-Based Technique for the Acceleration of Deep Convolutional Networks
Creators: name: Pikoulis, Erion-Vasilis
name: Mavrokefalidis, Christos
name: Lalos, Aris S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Deep learning and especially the use of Deep Neural Networks (DNNs) provides impressive results in various regression and classification tasks. However, to achieve these results, there is a high demand for computing and storing resources. This becomes problematic when, for instance, real-time, mobile applications are considered, in which the involved (embedded) devices have limited resources. A common way of addressing this problem is to transform the original large pre-trained networks into new smaller models, by utilizing Model Compression and Acceleration (MCA) techniques. Within the MCA framework, we propose a clustering-based approach that is able to increase the number of employed centroids/representatives, while at the same time, have an acceleration gain compared to conventional, $k$-means based approaches. This is achieved by imposing a special structure to the employed representatives, which is enabled by the particularities of the problem at hand. Moreover, the theoretical acceleration gains are presented and the key system hyper-parameters that affect that gain, are identified. Extensive evaluation studies carried out using various state-of-the-art DNN models trained in image classification, validate the superiority of the proposed method as compared for its use in MCA tasks.
ОЦЕНКА ФИНАНСОВОЙ УСТОЙЧИВОСТИ КОММЕРЧЕСКОГО БАНКА
Creators: name: Лимаева А.А.
Publisher: name: Кронос: экономические науки
Year: 2020
Subjects: КОММЕРЧЕСКИЙ БАНК
ФИНАНСОВЫЙ АНАЛИЗ
ФИНАНСОВАЯ УСТОЙЧИВОСТЬ
COMMERCIAL BANK
FINANCIAL ANALYSIS
FINANCIAL STABILITY

description: На сегодняшний день в условиях рыночной экономики одним из ключевых понятий, которое применяется при оценке деятельности коммерческого банка, является финансовая устойчивость. В статье рассмотрены основные факторы, влияющие на финансовую устойчивость банка, и группы показателей, которые используются для оценки финансовой устойчивости коммерческого банка в РФ.
The Nature of a Cosmic-Ray Accelerator, CTB37 B, Observed with Suzaku and Chandra
Creators: name: Nakamura, Ryoko
name: Bamba, Aya
name: Ishida, Manabu
name: Nakajima, Hiroshi
name: Yamazaki, Ryo
name: Terada, Yukikatsu
name: Puhlhofer, Gerd
name: Wagner, Stefan J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on Suzaku and Chandra observations of the young supernova remnant CTB37B, from which TeV gamma-rays were detected by the H.E.S.S. Cherenkov telescope. The 80 ks Suzaku observation provided us with a clear image of diffuse emission and high-quality spectra. The spectra revealed that the diffuse emission is comprised of thermal and non-thermal components. The thermal component can be represented by an NEI model with a temperature, a pre-shock electron density and an age of 0.9(0.7-1.1) keV, 0.4(0.3-0.5) cm^{-3} and 650(350-3150) yr, respectively. This suggests that the explosion of CTB37B occurred in a low-density space. A non-thermal power-law component was found from the southern region of CTB37B. Its photon index of ~1.5 and a high roll-off energy (>15 keV) indicate efficient cosmic-ray acceleration. A comparison of this X-ray spectrum with the TeV gamma-ray spectrum leads us to conclude that the TeV gamma-ray emission seems to be powered by either multi-zone Inverse Compton scattering or the decay of neutral pions. The point source resolved by Chandra near the shell is probably associated with CTB37B, because of the common hydrogen column density with the diffuse thermal emission. Spectral and temporal characteristics suggest that this source is a new anomalous X-ray pulsar.
description: 20 pages, 8 figures, accepted for publication in PASJ
Selection rules and dynamic magnetoelectric effect of the spin waves in multiferroic BiFeO$_3$
Creators: name: Farkas, D. G.
name: Szaller, D.
name: Kézsmárki, I.
name: Nagel, U.
name: Rõõm, T.
name: Peedu, L.
name: Viirok, J.
name: White, J. S.
name: Cubitt, R.
name: Ito, T.
name: Fishman, R. S.
name: Bordács, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the magnetic field dependence of the THz absorption and non-reciprocal directional dichroism spectra of BiFeO$_3$ measured on the three principal crystal cuts for fields applied along the three principal directions of each cut. From the systematic study of the light polarization dependence we deduced the optical selection rules of the spin-wave excitations. Our THz data, combined with small-angle neutron scattering results showed that i) an in-plane magnetic field rotates the $\mathbf{q}$ vectors of the cycloids perpendicular to the magnetic field, and ii) the selection rules are mostly determined by the orientation of the $\mathbf{q}$ vector with respect to the electromagnetic fields. We observed a magnetic field history dependent change in the strength and the frequency of the spin-wave modes, which we attributed to the change of the orientation and the length of the cycloidal $\mathbf{q}$ vector, respectively. Finally, we compared our experimental data with the results of linear spin-wave theory that reproduces the magnetic field dependence of the spin-wave frequencies and most of the selection rules, from which we identified the spin-polarization coupling terms relevant for the optical magnetoelectric effect.
Functional determinants for general self-adjoint extensions of Laplace-type operators resulting from the generalized cone
Creators: name: Kirsten, Klaus
name: Loya, Paul
name: Park, Jinsung
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 58J28; 58J52

description: In this article we consider the zeta regularized determinant of Laplace-type operators on the generalized cone. For {\it arbitrary} self-adjoint extensions of a matrix of singular ordinary differential operators modelled on the generalized cone, a closed expression for the determinant is given. The result involves a determinant of an endomorphism of a finite-dimensional vector space, the endomorphism encoding the self-adjoint extension chosen. For particular examples, like the Friedrich's extension, the answer is easily extracted from the general result. In combination with \cite{BKD}, a closed expression for the determinant of an arbitrary self-adjoint extension of the full Laplace-type operator on the generalized cone can be obtained.
description: 27 pages, 2 figures; to appear in Manuscripta Mathematica
TESS survey of rotational and pulsational variability of mercury-manganese stars
Creators: name: Kochukhov, O.
name: Khalack, V.
name: Kobzar, O.
name: Neiner, C.
name: Paunzen, E.
name: Labadie-Bartz, J.
name: David-Uraz, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Mercury-manganese (HgMn) stars are late-B upper main sequence chemically peculiar stars distinguished by large overabundances of heavy elements, slow rotation, and frequent membership in close binary systems. These stars lack strong magnetic fields typical of magnetic Bp stars but occasionally exhibit non-uniform surface distributions of chemical elements. The physical origin and the extent of this spot formation phenomenon remains unknown. Here we use 2-min cadence light curves of 64 HgMn stars observed by the TESS satellite during the first two years of its operation to investigate the incidence of rotational modulation and pulsations among HgMn stars. We found rotational variability with amplitudes of 0.1-3 mmag in 84 per cent of the targets, indicating ubiquitous presence of starspots on HgMn-star surfaces. Rotational period measurements reveal six fast-rotating stars with periods below 1.2 d, including one ultra-fast rotator (HD 14228) with a 0.34 d period. We also identify several HgMn stars showing multi-periodic g-mode pulsations, tidally induced variation and eclipses in binary systems.
description: 18 pages, 7 figures; accepted for publication in MNRAS
Confinement and the second vortex of the SU(4) gauge group
Creators: name: Deldar, Sedigheh
name: Rafibakhsh, Shahnoosh
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the potential between static SU(4) sources using the Model of Thick Center Vortices. Such vortices are characterized by the center elements $z_1=\mathrm i$ and $z_2=z_1^2$. Fitting the ratios of string tensions to those obtained in Monte-Carlo calculations of lattice QCD we get $f_2>f_1^2$, where $f_n$ is the probability that a vortex of type $n$ is piercing a plaquette. Because of $z_2=z_1^2$ vortices of type two are overlapping vortices of type one. Therefore, $f_2>f_1^2$ corresponds to the existence of an attractive force between vortices of type one.
Variational Monte-Carlo calculation of the nematic state of the two-dimensional electron gas in a magnetic field
Creators: name: Doan, Quoc M.
name: Manousakis, Efstratios
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use a Jastrow-Slater wave function with an elliptical Fermi sea to describe the nematic state of the two-dimensional electron gas in a magnetic field and the Monte Carlo method to calculate a variational energy upper bound. These energy upper bounds are compared with other upper bounds describing stripe-ordered ground states which are obtained from optimized Hartree-Fock calculations and with those which correspond to an isotropic ground state. Our findings support the conclusions drawn in our previous study where the Fermi-hypernetted chain approximation was used instead of the Monte Carlo method. Namely, the nematic state becomes energetically favorable relative to the stripe-ordered Wigner crystal phase for the second excited Landau level and below a critical value of the layer ``thickness'' parameter which is very close to its value in the actual materials.
description: 6 pages, 8 figures
A Moving Bump in a Continuous Manifold: A Comprehensive Study of the Tracking Dynamics of Continuous Attractor Neural Networks
Creators: name: Fung, C. C. Alan
name: Wong, K. Y. Michael
name: Wu, Si
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Understanding how the dynamics of a neural network is shaped by the network structure, and consequently how the network structure facilitates the functions implemented by the neural system, is at the core of using mathematical models to elucidate brain functions. This study investigates the tracking dynamics of continuous attractor neural networks (CANNs). Due to the translational invariance of neuronal recurrent interactions, CANNs can hold a continuous family of stationary states. They form a continuous manifold in which the neural system is neutrally stable. We systematically explore how this property facilitates the tracking performance of a CANN, which is believed to have clear correspondence with brain functions. By using the wave functions of the quantum harmonic oscillator as the basis, we demonstrate how the dynamics of a CANN is decomposed into different motion modes, corresponding to distortions in the amplitude, position, width or skewness of the network state. We then develop a perturbative approach that utilizes the dominating movement of the network's stationary states in the state space. This method allows us to approximate the network dynamics up to an arbitrary accuracy depending on the order of perturbation used. We quantify the distortions of a Gaussian bump during tracking, and study their effects on the tracking performance. Results are obtained on the maximum speed for a moving stimulus to be trackable and the reaction time for the network to catch up with an abrupt change in the stimulus.
description: 43 pages, 10 figures
On the Interpretation of the Age Distribution of Star Clusters in the Small Magellanic Cloud
Creators: name: Gieles, M.
name: Lamers, H. J. G. L. M.
name: Zwart, S. F. Portegies
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We re-analyze the age distribution (dN/dt) of star clusters in the Small Magellanic Cloud (SMC) using age determinations based on the Magellanic Cloud Photometric Survey. For ages younger than 3x10^9 yr the dN/dt distribution can be approximated by a power-law distribution, dN/dt propto t^-beta, with -beta=-0.70+/-0.05 or -beta=-0.84+/-0.04, depending on the model used to derive the ages. Predictions for a cluster population without dissolution limited by a V-band detection result in a power-law dN/dt distribution with an index of ~-0.7. This is because the limiting cluster mass increases with age, due to evolutionary fading of clusters, reducing the number of observed clusters at old ages. When a mass cut well above the limiting cluster mass is applied, the dN/dt distribution is flat up to 1 Gyr. We conclude that cluster dissolution is of small importance in shaping the dN/dt distribution and incompleteness causes dN/dt to decline. The reason that no (mass independent) infant mortality of star clusters in the first ~10-20 Myr is found is explained by a detection bias towards clusters without nebular emission, i.e. cluster that have survived the infant mortality phase. The reason we find no evidence for tidal (mass dependent) cluster dissolution in the first Gyr is explained by the weak tidal field of the SMC. Our results are in sharp contrast to the interpretation of Chandar et al. (2006), who interpret the declining dN/dt distribution as rapid cluster dissolution. This is due to their erroneous assumption that the sample is limited by cluster mass, rather than luminosity.
description: 8 pages, 4 figures, accepted for publication in ApJ
ПРОБЛЕМА ПРИВЛЕЧЕНИЯ НАЦИОНАЛЬНОГО ИНВЕСТОРА В ПЕРСПЕКТИВНЫЕ ОТРАСЛИ КАЗАХСТАНА
Creators: name: Ярмахаметова Аида Бахтияркызы
name: Приходько Ксения Викторовна
name: Басакова Мукадяс Ибрагимовна
name: Альжанова Асем Миржанкызы
name: Борхонов Саидамонуллохон Мансурович
name: Бекбасарова Тогжан Жонисбековна
Publisher: name: Кронос: экономические науки
Year: 2020
Subjects: ИНВЕСТИЦИИ
ИНВЕСТОРЫ
ИНВЕСТИЦИОННАЯ СРЕДА
НАЦИОНАЛЬНЫЕ ИНВЕСТОРЫ
ДЕНЕЖНЫЕ СРЕДСТВА
СТРУКТУРА ИНВЕСТИЦИЙ
ИНВЕСТИЦИОННЫЙ КЛИМАТ
ПЕРЕВОДЫ
БИРЖЕВЫЕ РЫНКИ
ОСНОВНОЙ КАПИТАЛ
ЭКОНОМИЧЕСКИЕ РИСКИ

description: Формирование экономических процессов в обществе стимулировали развитие новых направлений деятельности развитых экономик мира. Этапы развития жизнедеятельности, постепенно выявляли различные способы заработка денежных средств. Постепенно начали развиваться биржевые рынки, что в дальнейшем послужило развитию инвестиционной деятельности. Со временем все больше бизнесменов стали проявлять интерес в инвестирование денежных средств. Инвестиции - являются одним из популярных и прибыльных, вложений. Таким образом, можно отметить, что инвестиции являются активным доходом, которым можно руководить в любой точке мира. Но стоит заметить, что инвестирование денежных средств, одно из рискованных вкладов. В данной статье детально рассматриваются инвестиции, а также влияние инвестиционной среды на развитие компании и экономику государства.
Geotechnical considerations for offshore gravity type structures with emphasis on foundation stability under storm wave loading
Creators: name: Gaard, Thomas C.
Publisher: name: University of British Columbia
Year: 2010

description: A thorough discussion of offshore gravity type structures presently being used, or considered for use in the near future by the oil industry, is presented, along with a brief summary of the major types of structures now used offshore. Factors affecting the stability of offshore gravity type structures are discussed, from the evaluation of a suitable site and the selection of soil parameters, through installation and short-term foundation safety. A case study of the Ekofisk tank is included to show how geotechnical concepts are applied offshore. A thorough description of wave loading on offshore gravity structures is presented, including a discussion on how the design storm is used in geotechnical analyses. Existing stability methods are reviewed. The merits and shortcomings of each method are discussed with respect to their application offshore. Procedures for analyzing the stability of offshore gravity type structures subjected to storm wave loading are developed based on the method of slices. Both Janbu's (1973) Generalized Procedure of Slices and Sarma's (1973) method are adapted for offshore analyses. The latter method is modified to perform pseudo-three-dimensional analyses. A computer program GRAVSTAB developed for this purpose is described and applied to several example problems. The versatility of the method of analysis is demonstrated and results are compared with existing methods.
A constrained-transport magnetohydrodynamics algorithm with near-spectral resolution
Creators: name: Maron, Jason
name: Mac Low, Mordecai-Mark
name: Oishi, Jeffrey
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Numerical simulations including magnetic fields have become important in many fields of astrophysics. Evolution of magnetic fields by the constrained transport algorithm preserves magnetic divergence to machine precision, and thus represents one preferred method for the inclusion of magnetic fields in simulations. We show that constrained transport can be implemented with volume-centered fields and hyperresistivity on a high-order finite difference stencil. Additionally, the finite-difference coefficients can be tuned to enhance high-wavenumber resolution. Similar techniques can be used for the interpolations required for dealiasing corrections at high wavenumber. Together, these measures yield an algorithm with a wavenumber resolution that approaches the theoretical maximum achieved by spectral algorithms. Because this algorithm uses finite differences instead of fast Fourier transforms, it runs faster and isn't restricted to periodic boundary conditions. Also, since the finite differences are spatially local, this algorithm is easily scalable to thousands of processors. We demonstrate that, for low-Mach-number turbulence, the results agree well with a high-order, non-constrained-transport scheme with Poisson divergence cleaning.
description: 26 pages, 8 figures, accepted for publication in the Astrophysical Journal
Skewness and Kurtosis in Stochastic Thermodynamics
Creators: name: Wampler, Taylor
name: Barato, Andre C
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The thermodynamic uncertainty relation is a prominent result in stochastic thermodynamics that provides a bound on the fluctuations of any thermodynamic flux, also known as current, in terms of the average rate of entropy production. Such fluctuations are quantified by the second moment of the probability distribution of the current. The role of higher order standardized moments such as skewness and kurtosis remains largely unexplored. We analyze the skewness and kurtosis associated with the first passage time of thermodynamic currents within the framework of stochastic thermodynamics. We develop a method to evaluate higher order standardized moments associated with the first passage time of any current. For systems with a unicyclic network of states, we conjecture upper and lower bounds on skewness and kurtosis associated with entropy production. These bounds depend on the number of states and the thermodynamic force that drives the system out of equilibrium. We show that these bounds for skewness and kurtosis do not hold for multicyclic networks. We discuss the application of our results to infer an underlying network of states.
description: 14 pages, 6 figures
Geodesics and Bending of Light around a BTZ Black Hole Surrounded by Quintessential Matter
Creators: name: Kala, Shubham
name: Nandan, Hemwati
name: Sharma, Prateek
name: Elmardi, Maye
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Various observations from cosmic microwave background radiation (CMBR), type Ia supernova and baryon acoustic oscillations (BAO) are strongly suggestive of an accelerated expansion of the universe which can be explained by the presence of mysterious energy known as dark energy. The quintessential matter coupled with gravity minimally is considered one of the possible candidates to represents the presence of such dark energy in our universe. In view of this scenario, we study the geodesic of massless particles as well as massive particles around a (2+1) dimensional BTZ black hole (BH) spacetime surrounded by the quintessence. The effect of parameters involved in the deflection of light by such a BH spacetime is investigated in detail. The results obtained are then compared with a usual non-rotating BTZ BH spacetime.
description: Accepted in Modern Physics Letters A
AI Snippets for Language Learning and Teaching: Practical Ideas for Language Educators
Creators: name: Vazquez-Calvo, Boris
Publisher: name: Zenodo
Year: 2024

description: This workshop overviews how AI can enhance key language and academic skills, with a focus on promoting self-regulated learning. It covers five key areas: (1) oral comprehension and production, where AI tools offering speech recognition and pronunciation feedback improve listening and speaking skills through real-time correction and interactive exercises; (2) oral and written interaction, where conversational agents and chatbots simulate real-world communication, providing contextual feedback to develop interactive language abilities; (3) written comprehension and production, where automated writing assistants and text analysis tools refine grammar, vocabulary, and cohesion in writing; (4) language teaching materials design, where AI tools assist in creating instructional materials; and (5) academic research, where AI tools support research processes such as literature reviews and data organization. Additionally, the workshop will address the ethical considerations involved in using AI for language learning, including issues of data privacy and algorithmic bias. This session equips students with the necessary skills to integrate AI into their language learning, research, and educational practices effectively.
A Bayesian Inference Framework for Gamma-Ray Burst Afterglow Properties
Creators: name: Lin, En-Tzu
name: Hayes, Fergus
name: Lamb, Gavin P.
name: Heng, Ik Siong
name: Kong, Albert K. H.
name: Williams, Michael J.
name: Saha, Surojit
name: Veitch, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the field of multi-messenger astronomy, Bayesian inference is commonly adopted to compare the compatibility of models given the observed data. However, to describe a physical system like neutron star mergers and their associated gamma-ray burst (GRB) events, usually more than ten physical parameters are incorporated in the model. With such a complex model, likelihood evaluation for each Monte Carlo sampling point becomes a massive task and requires a significant amount of computational power. In this work, we perform quick parameter estimation on simulated GRB X-ray light curves using an interpolated physical GRB model. This is achieved by generating a grid of GRB afterglow light curves across the parameter space and replacing the likelihood with a simple interpolation function in the high-dimensional grid that stores all light curves. This framework, compared to the original method, leads to a $\sim$90$\times$ speedup per likelihood estimation. It will allow us to explore different jet models and enable fast model comparison in the future.
description: 9 pages, 4 figures, accepted to the special issue of Universe, "Waiting for GODOT -- Present and Future of Multi-Messenger Astronomy"
Can Solar Neutrinos be a Serious Background in Direct Dark Matter Searches?
Creators: name: Vergados, J. D.
name: Ejiri, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The coherent contribution of all neutrons in neutrino nucleus scattering due to the neutral current is examined considering the boron solar neutrinos. These neutrinos could potentially become a source of background in the future dark matter searches aiming at nucleon cross sections in the region well below the few events per ton per year.
description: 15 pages, 17 eps figures
Additional file 1: of Protocol for a cluster randomised controlled trial of a Peer-Led physical Activity iNtervention for Adolescent girls (PLAN-A)
Creators: name: Willis, Kathryn
name: Tibbitts, Byron
name: Sebire, Simon
name: Reid, Tom
name: MacNeill, Stephanie
name: Sanderson, Emily
name: Hollingworth, William
name: Kandiyali, Rebecca
name: Campbell, Rona
name: Kipping, Ruth
name: Jago, Russell
Publisher: name: Figshare
Year: 2019
Subjects: Medicine
Developmental Biology
Science Policy

description: Spirit 2013 checklist. Recommended items to address in a clinical trial protocol and related documents. (DOC 125 kb)
Precipitation radar as a source of hydrometeorological data
Creators: name: Bonser, J. D.
Publisher: name: University of British Columbia
Year: 2010

description: The application of radar-derived precipitation measurements to engineering hydrology is investigated in this thesis. The nature of precipitation phenomena and current measurement techniques are introduced, followed by a detailed explanation of radar as a quantitative measurement tool. Archive data for the operational SCEPTRE radar in Abbotsford for five storm events was obtained from the Canadian Atmospheric Environment Service. Errors inherent in this data and those introduced during processing are investigated, and a comparison with point raingauge values is given. An interactive colour image display system is presented and precipitation patterns seen in the displayed image sequences are discussed. Applications of radar-deirived rainfall data to engineering runoff models are described, and the benefits and limitations of this data source are studied. An urban runoff case study using the Storm Water Management Model to simulate a catchment in Vancouver is given, and conclusions regarding the spatial and temporal resolution requirements of rainfall data sources are drawn from the results. The thesis concludes with recommendations for improvements to the SCEPTRE radar and to the archive system to make radar data more useful to engineering hydrologists.
Heat transfer process with solid-solid interface: Analytical and numerical solutions
Creators: name: Rubio, Diana
name: Tarzia, Domingo A.
name: Umbricht, Guillermo F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: This work is aimed at the study and analysis of the heat transport on a metal bar of length $L$ with a solid-solid interface. The process is assumed to be developed along one direction, across two homogeneous and isotropic materials. Analytical and numerical solutions are obtained under continuity conditions at the interface, that is a perfect assembly. The lateral side is assumed to be isolated and a constant thermal source is located at the left-boundary while the right-end stays free allowing the heat to transfer to the surrounding fluid by a convective process. The differences between the analytic solution and temperature measurements at any point on the right would indicate the presence of discontinuities. The greater these differences, the greater the discontinuity in the interface due to thermal resistances, providing a measure of its propagation from the interface and they could be modeled as temperature perturbations. The problem of interest may be described by a parabolic equation with initial, interface and boundary conditions, where the thermal properties, the conductivity and diffusivity coefficients, are piecewise constant functions. The analytic solution is derived by using Fourier methods. Special attention is given to the Sturm-Liouville problem that arises when deriving the solution, since a complicated eigenvalue equation must to be solved. Numerical simulations are conducted by using finite difference schemes where its convergence and stability properties are discussed along with physical interpretations of the results.
description: 10 Pages, 8 Figures, 3 Tables
Is Physics Asking for a New Kinematics?
Creators: name: Aldrovandi, R.
name: Pereira, J. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is discussed whether some of the consistency problems of present-day physics could be solved by replacing special relativity, whose underlying kinematics is ruled by the Poincare' group, by de Sitter relativity, with underlying kinematics ruled by the de Sitter group. In contrast to ordinary special relativity, which seems to fail at the Planck scale, this new relativity is "universal" in the sense that it holds at all energy scales.
description: 8 pages, no figures; Honorable Mention in the Gravity Research Foundation essay contest, 2008. V2: Small presentation change, reference added; matches published version
ОСОБЕННОСТИ РАЗВИТИЯ МАТЕМАТИЧЕСКИХ ПРЕДСТАВЛЕНИЙ У ДЕТЕЙ СРЕДНЕЙ ГРУППЫ
Creators: name: Гребенникова Надежда Лукьяновна
name: Халитова Ильмира Амировна
Publisher: name: Кронос: психология и педагогика
Year: 2020
Subjects: МАТЕМАТИЧЕСКИЕ ПРЕДСТАВЛЕНИЯ
СЧЕТ
ВЕЛИЧИНА
ФОРМА
САМОСТОЯТЕЛЬНОСТЬ
MATHEMATICAL REPRESENTATIONS
ACCOUNT
VALUE
FORM
INDEPENDENCE

description: В статье поднимается вопрос о развитии математических представлений детей средней группы. Способы формирования знаний о понятиях счета, величины предметов и форм, пути их наиболее основательного освоения ребенком для использования в дальнейших задачах.
Tunneling Spectra of Individual Magnetic Endofullerene Molecules
Creators: name: Grose, Jacob E.
name: Tam, Eugenia S.
name: Timm, Carsten
name: Scheloske, Michael
name: Ulgut, Burak
name: Parks, Joshua J.
name: Abruna, Hector D.
name: Harneit, Wolfgang
name: Ralph, Daniel C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The manipulation of single magnetic molecules may enable new strategies for high-density information storage and quantum-state control. However, progress in these areas depends on developing techniques for addressing individual molecules and controlling their spin. Here we report success in making electrical contact to individual magnetic N@C60 molecules and measuring spin excitations in their electron tunneling spectra. We verify that the molecules remain magnetic by observing a transition as a function of magnetic field which changes the spin quantum number and also the existence of nonequilibrium tunneling originating from low-energy excited states. From the tunneling spectra, we identify the charge and spin states of the molecule. The measured spectra can be reproduced theoretically by accounting for the exchange interaction between the nitrogen spin and electron(s) on the C60 cage.
description: 7 pages, 4 figures. Typeset in LaTeX, updated text of previous version
Additional file 1: of Efficacy and safety of duloxetine versus placebo in adolescents with juvenile fibromyalgia: results from a randomized controlled trial
Creators: name: Himanshu Upadhyaya
name: Arnold, Lesley
name: Alaka, Karla
name: Meihua Qiao
name: Williams, David
name: Mehta, Renata
Publisher: name: Figshare
Year: 2019
Subjects: subject: Medicine
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Table S1. Complete list of inclusion and exclusion criteria. (DOCX 18 kb)
BO'LAJAK O'QITUVCHILARNING AKMELOGIK KOMPETENTLILIGINI RIVOJLANTIRISHNING PEDAGOGIK IMKONIYATLARI
Creators: name: Safayeva, Diyora
Publisher: name: Zenodo
Year: 2023

description: Mazkur maqolada bo'lajak o'qituvchining akmeologik kompetentsiyasining mohiyati ko'rib chiqiladi. Uning tarkibiy tarkibiy qismlarining tarkibi va tarkibi aniqlanadi: ehtiyoj-motivatsion, kognitiv, qiymat-semantik, fikr faoliyati, kasbiy faoliyat, ijtimoiy-kooperativ va refleksiv-boshqaruv. Uning asosiy funktsiyalari ta'kidlangan: rag'batlantiruvchi-motivatsion, kognitiv, me'yoriy-tartibga soluvchi, ijodiy va ijodiy rivojlanish. Uning rivojlanishining uchta darajasi aniqlandi: past, o'rta va yuqori. Uning ikki turiga xos xususiyat berilgan: an'anaviy evolyutsion va faoliyat-refleksiv xususiyatlari yoritib beriladi.
The metal abundance of circumnuclear star forming regions in early type spirals. Spectrophotometric observations
Creators: name: Diaz, Angeles I.
name: Terlevich, Elena
name: Castellanos, Marcelo
name: Hagele, Guillermo F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have obtained long-slit observations in the optical and near infrared of 12 circumnuclear HII regions (CNSFR) in the early type spiral galaxies NGC 2903, NGC 3351 and NGC 3504 with the aim of deriving their chemical abundances. Only for one of the regions, the [SIII] $λ$ 6312 Åwas detected providing, together with the nebular [SIII] lines at $λλ$ 9069, 9532 Å, a value of the electron temperature of T$_e$([SIII])= 8400$^{+ 4650}_{-1250}$K. A semi-empirical method for the derivation of abundances in the high metallicity regime is presented. We obtain abundances which are comparable to those found in high metallicity disc HII regions from direct measurements of electron temperatures and consistent with solar values within the errors. The region with the highest oxygen abundance is R3+R4 in NGC 3504, 12+log(O/H) = 8.85, about 1.5 solar if the solar oxygen abundance is set at the value derived by Asplund et al. (2005), 12+log(O/H)$_{\odot}$ = 8.66$\pm$0.05. Region R7 in NGC 3351 has the lowest oxygen abundance of the sample, about 0.6 times solar. In all the observed CNSFR the O/H abundance is dominated by the O$^+$/H$^+$ contribution, as is also the case for high metallicity disc HII regions. For our observed regions, however, also the S$^+$/S$^{2+}$ ratio is larger than one, contrary to what is found in high metallicity disc HII regions for which, in general, the sulphur abundances are dominated by S$^{2+}$/H$^+$...
description: 24 pages, 19 figures, accepted by MNRAS
The I^G J^{PC}=0^+ 1^{-+} Tetraquark State
Creators: name: Chen, Hua-Xing
name: Hosaka, Atsushi
name: Zhu, Shi-Lin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the tetraquark state with I^G J^{PC} = 0^+ 1^{-+} in the QCD sum rule. We exhaust all possible flavor structures by using a diquark-antidiquark construction and find that the flavor structure 3*6+6*3 is preferred. There are altogether four independent currents which have the quark contents q s \bar q \bar s. By using both the Shifman-Vainshtein-Zakharov (SVZ) sum rule and the finite energy sum rule, these currents lead to mass estimates around 1.8 - 2.1 GeV, where the uncertainty is due to the mixing of two single currents. Its possible decay modes are S-wave b_1(1235) ηand b_1(1235) η^\prime, and P-wave KK, ηη, ηη^\prime and η^\prime η^\prime, etc. The decay width is around 150 MeV through a rough estimation.
description: 4 pages, 4 figures, revised version to appear in Phys. Rev. D
Repetitions of multinomial coefficients and a generalization of Singmaster's conjecture
Creators: name: de Koninck, Jean-Marie
name: Doyon, Nicolas
name: Verreault, William
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B65 (Primary) 05A10 (Secondary)

description: Given two integers $k\geq 2$ and $a>1$, let $N_k(a)$ stand for the number of multinomial coefficients, with $k$ terms, equal to $a$. We study the behavior of $N_k(a)$ and show that its average and normal orders are equal to $k(k-1)$. We also prove that $N_k(a)=O\left((\log a/\log\log a)^{k-1}\right)$ and make several propositions about extreme results regarding large values of $N_k(a)$.
description: 11 pages
Thermal transport and phase transitions of zirconia by on-the-fly machine-learned interatomic potentials
Creators: name: Verdi, Carla
name: Karsai, Ferenc
name: Liu, Peitao
name: Jinnouchi, Ryosuke
name: Kresse, Georg
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Machine-learned interatomic potentials enable realistic finite temperature calculations of complex materials properties with first-principles accuracy. It is not yet clear, however, how accurately they describe anharmonic properties, which are crucial for predicting the lattice thermal conductivity and phase transitions in solids and, thus, shape their technological applications. Here we employ a recently developed on-the-fly learning technique based on molecular dynamics and Bayesian inference in order to generate an interatomic potential capable to describe the thermodynamic properties of zirconia, an important transition metal oxide. This machine-learned potential accurately captures the temperature-induced phase transitions below the melting point. We further showcase the predictive power of the potential by calculating the heat transport on the basis of Green-Kubo theory, which allows to account for anharmonic effects to all orders. This study indicates that machine-learned potentials trained on the fly offer a routine solution for accurate and efficient simulations of the thermodynamic properties of a vast class of anharmonic materials.
Constant terms in threshold resummation and the quark form factor
Creators: name: Friot, S.
name: Grunberg, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We verify to order alpha_s^4 two previously conjectured relations, valid in four dimensions, between constant terms in threshold resummation (for Deep Inelastic Scattering and the Drell-Yan process) and the second logarithmic derivative of the massless quark form factor. The same relations are checked to all orders in the large beta_0 limit; as a byproduct a dispersive representation of the form factor is obtained. These relations allow to compute in a symmetrical way the three-loop resummation coefficients B_3 and D_3 in terms of the three-loop contributions to the virtual diagonal splitting function and to the quark form factor, confirming results obtained in the literature.
description: 39 pages, no figure; version 2: same content, but improved presentation, with a new section devoted to the variety of resummation procedures; version 3: journal version, where a remark about the all orders validity of the conjecture in the DIS case is reported
Undrained time dependent behavior of a lightly overconsolidated natural clay
Creators: name: Zergoun, Mustapha
Publisher: name: University of British Columbia
Year: 2010

description: Time dependence of stress-strain and strength characteristics of a sensitive, overconsolidated, intact clay have been investigated under undrained conditions. Various time loading histories in undrained triaxial compression, under a given consolidation history, showed that increase in speed of testing results in stiffer stress-strain response and higher strength, and that sustained stress or load causes a reduction of strength with time. In all tests, rupture was triggered at about the same critical level of strain. Correlation among the various tests supported the validity of the equation-of-state uniquely relating stress, strain and strain-rate. Comparison with the same clay destructured on normal consolidation showed that destructuration of the clay does not cause any significant change in its time dependent behavior.
ПОЭТАПНОЕ ИЗУЧЕНИЕ ВЕЛИЧИНЫ «ДЛИНА» С МЛАДШИМИ ШКОЛЬНИКАМИ
Creators: name: Гребенникова Н.Л.
name: Назарова В.Р.
name: Тихонова О.С.
Publisher: name: Кронос: психология и педагогика
Year: 2020
Subjects: ФГОС НОО
МАТЕМАТИКА
НАЧАЛЬНАЯ ШКОЛА
ВЕЛИЧИНА «ДЛИНА»
ЖИЗНЕННАЯ СИТУАЦИЯ
ДИДАКТИЧЕСКАЯ ИГРА
FGOS NOO
MATHEMATICS
ELEMENTARY SCHOOL
THE VALUE «LENGTH»
LIFE SITUATION
DIDACTIC GAME

description: В статье раскрывается поэтапное изучения величины «Длина» в начальной школе по УМК «Школа России». Рассмотрены методические приемы, используемые при освоении каждой единицы длины. Делается акцент на то, что знакомство с единицами длины должно связываться с той или иной жизненной ситуацией или дидактической игрой, моделирующей ее.
Bright-soliton frequency combs and dressed states in chi(2) microresonators
Creators: name: Puzyrev, D. N.
name: Pankratov, V. V.
name: Villois, A.
name: Skryabin, D. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We present a theory of the frequency comb generation in the high-Q ring microresonators with quadratic nonlinearity and normal dispersion and demonstrate that the naturally large difference of the repetition rates at the fundamental and 2nd harmonic frequencies supports a family of the bright soliton frequency combs providing the parametric gain is moderated by tuning the index-matching parameter to exceed the repetition rate difference by a significant factor. This factor equals the sideband number associated with the high-order phase-matched sum-frequency process. The theoretical framework, i.e., the dressed-resonator method, to study the frequency conversion and comb generation is formulated by including the sum-frequency nonlinearity into the definition of the resonator spectrum. The Rabi splitting of the dressed frequencies leads to the four distinct parametric down-conversion conditions (signal-idler-pump photon energy conservation laws). The parametric instability tongues associated with the generation of the sparse, i.e., Turing-pattern-like, frequency combs with varying repetition rates are analysed in details. The sum-frequency matched sideband exhibits the optical Pockels nonlinearity and strongly modified dispersion, which limit the soliton bandwidth and also play a distinct role in the Turing comb generation. Our methodology and data highlight the analogy between the driven multimode resonators and the photon-atom interaction.
description: 17 figures, and >20 pages
Transition rates for a S \ge 1 model coupled to a phonon bath
Creators: name: Park, Kyungwha
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate transition rates between different spin configurations for $S \ge 1$ spins weakly coupled to a $d$-dimensional phonon bath. This study is motivated by understanding observed magnetization relaxation as a function of temperature in diverse magnetic systems such as arrays of magnetic nanoparticles and magnetic molecules. We assume that the magnetization of the spin system relaxes through consecutive emission or absorption of a single phonon. From a weak, linear spin-phonon coupling Hamiltonian, we derive transition rates that would be used to examine dynamic properties of the system in kinetic Monte Carlo simulations. Although the derived phonon-assisted transition rates satisfy detailed balance, in the case of two and three dimensional phonon baths, transitions between degenerate states are not allowed. Thus, if there are no alternative paths along which the spin system can relax, the relaxation time diverges. Otherwise, the system finds other paths, which leads to an increase in the relaxation time and energy barrier. However, when higher-order phonon processes are included in the transition rates, it is found that the system can reach the states which were inaccessible due to the forbidden transitions. As a result, the system recovers some of the dynamic properties obtained using the Glauber transition rate.
description: 8 figures. Submitted to PRB
title: ReConRank: A Scalable Ranking Method for Semantic Web Data with Context
Creators: name: Hogan, Aidan
name: Harth, Andreas
name: Decker, Stefan
Publisher: name: University of Galway
Year: 2006
Subjects: subject: Semantic Web
subject: RDF (Document markup language)

description: We present an approach that adapts the well-known PageRank/HITS algorithms to Semantic Web data. Our method combines ranks from the RDF graph with ranks from the context graph, i.e. data sources and their linkage. We present performance evaluation results based on a large RDF data set obtained from the Web.
The approach with the Data Protection and Privacy Relationships Model (DAPPREMO)
Creators: name: Fabiano, Nicola
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: We describe the Data Protection and Privacy Relationships Model (DAPPREMO), which is based on the set theory, considering that both the data protection and privacy regulation and Ethics principles in those domains belong to a set. DAPPREMO is a new and innovative solution to adopt a model in any data protection and privacy activities. We theorise that DAPPREMO is an innovative approach to have a broad overview of all the objects related to a specific case or more cases from data protection and privacy perspective. We describe DAPPREMO as a solution for a multidisciplinary approach to address any data protection and privacy issue.
title: Utilising knowledge graph embeddings for data-to-text generation
Creators: name: Pasricha, Nivranshu
name: Arcan, Mihael
name: Buitelaar, Paul
Publisher: name: Association for Computational Linguistics
Year: 2020
Subjects: subject: WebNLG
subject: Knowledge Graph Embeddings
subject: Data-to-Text Generation

description: Data-to-text generation has recently seen a move away from modular and pipeline architectures towards end-to-end architectures based on neural networks. In this work, we employ knowledge graph embeddings and explore their utility for end-to-end approaches in a data-to-text generation task. Our experiments show that using knowledge graph embeddings can yield an improvement of up to 2 3 BLEU points for seen categories on the WebNLG corpus without modifying the underlying neural network architecture.
Север и рынок. Формирование экономического порядка, Выпуск 12019
Creators: name: Кольский научный центр Российской академии наук
Publisher: name: Север и рынок. Формирование экономического порядка
Year: 2019

description: , Выпуск 12019
description: Журнал «Север и рынок: формирование экономического порядка» является одним из ведущих научных изданий по социальным и экономическим проблемам устойчивого развития российского Севера и Арктики. Важнейшим направлением публикуемых статей является анализ и прогнозирование динамики социально-экономических процессов в северных и арктических регионах с учетом влияния глобальных, национальных и региональных факторов, определяющих развитие территорий с экстремальными условиями жизнедеятельности и хозяйствования. Тематический спектр публикаций достаточно обширен и включает вопросы рационального экологосбалансированного природопользования, промышленной и инновационной политики, социальной политики, финансового регулирования и межбюджетных отношений, формирования социальной, производственной, энергетической и транспортной  инфраструктуры, развития международного сотрудничества на Севере и в Арктике, в том числе в рамках Баренцева Евро-Арктического региона.