cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Forecasting Value-at-Risk with Time-Varying Variance, Skewnessn and Kurtosis in an Exponential Weighted Moving Average Framework
Creators: name: Gabrielsen, Alexandros
name: Zagaglia, Paolo
name: Kirchner, Axel
name: Liu, Zhuoshi
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: SECS-P/02 Politica economica

description: This paper provides an insight to the time-varying dynamics of the shape of the distribution of financial return series by proposing an exponential weighted moving average model that jointly estimates volatility, skewness and kurtosis over time using a modified form of the Gram-Charlier density in which skewness and kurtosis appear directly in the functional form of this density. In this setting VaR can be described as a function of the time-varying higher moments by applying the Cornish-Fisher expansion series of the first four moments. An evaluation of the predictive performance of the proposed model in the estimation of 1-day and 10-day VaR forecasts is performed in comparison with the historical simulation, filtered historical simulation and GARCH model. The adequacy of the VaR forecasts is evaluated under the unconditional, independence and conditional likelihood ratio tests as well as Basel II regulatory tests. The results presented have significant implications for risk management, trading and hedging activities as well as in the pricing of equity derivatives.
Variational Inference for Latent Space Models for Dynamic Networks
Creators: name: Liu, Yan
name: Chen, Yuguo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Latent space models are popular for analyzing dynamic network data. We propose a variational approach to estimate the model parameters as well as the latent positions of the nodes in the network. The variational approach is much faster than Markov chain Monte Carlo algorithms, and is able to handle large networks. Theoretical properties of the variational Bayes risk of the proposed procedure are provided. We apply the variational method and latent space model to simulated data as well as real data to demonstrate its performance.
description: 50 pages
A DSGE model with Endogenous Term Structure
Creators: name: Falagiarda, Matteo
name: Marzo, Massimiliano
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: SECS-P/01 Economia politica

description: In this paper, we propose a DSGE model with the term structure of interest rates drawing on the framework introduced by Andrés et al. (2004) and Marzo et al. (2008). In particular, we reproduce segmentation in financial markets by introducing bonds of different maturities and bond adjustment costs non-zero at the steady state, introducing a structural liquidity frictions among bonds with different maturities: agents are assumed to pay a cost whenever they trade bonds. As a result, the model is able to generate a non-zero demand for bonds of different maturities, which become imperfect substitutes, due to differential liquidity conditions. The main properties of the model are analysed through both simulation and estimation exercises. The importance of the results are twofold. On one hand, the calibrated model is able to replicate the stylized facts regarding the yield curve and the term premium in the US over the period 1987:3-2011:3, without compromising its ability to match macro dynamics. On the other hand, the estimation, besides providing an empirical support to the theoretical setting, highlights the potentialities of the model to analyze the term premium in a microfounded macro framework. The results match very closely the behavior of actual yields, reflecting the recent activity of the Fed on longer maturities bonds.
Non-Abelian Strings in High Density QCD: Zero Modes and Interactions
Creators: name: Nakano, Eiji
name: Nitta, Muneto
name: Matsuura, Taeko
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The most fundamental strings in high density color superconductivity are the non-Abelian semi-superfluid strings which have color gauge flux tube but behave as superfluid vortices in the energetic point of view. We show that in addition to the usual translational zero modes, these vortices have normalizable orientational zero modes in the internal space, associated with the color-flavor locking symmetry broken in the presence of the strings. The interaction among two parallel non-Abelian semi-superfluid strings is derived for general relative orientational zero modes to show the universal repulsion. This implies that the previously known superfluid vortices, formed by spontaneously broken U(1)_B, are unstable to decay. Moreover, our result proves the stability of color superconductors in the presence of external color gauge fields.
description: 13 pages, 1 figure
Are current discontinuities in molecular devices experimentally observable?
Creators: name: Minotti, F.
name: Modanese, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: An ongoing debate in the first-principles description of conduction in molecular devices concerns the correct definition of current in the presence of non-local potentials. If the physical current density ${\bf j}=(-ie\hbar/2m)(Ψ^* \nabla Ψ- Ψ\nabla Ψ^*)$ is not locally conserved but can be re-adjusted by a non-local term, which current should be regarded as real? We prove that the extended Maxwell equations by Aharonov-Bohm give the e.m.\ field generated by such currents without any ambiguity. For an oscillating dipole we show that the radiated electrical field has a longitudinal component proportional to $ ω\hat{P}$, where $\hat{P}$ is the anomalous moment $\int \hat{I}(\mathbf{x})\mathbf{x} d^3x$ and $\hat{I}$ is the space-dependent part of the anomaly $I=\partial_t ρ+\nabla \cdot \mathbf{j}$. In the case of a stationary current in a molecular device, a failure of local current conservation causes a "missing field" effect that can be experimentally observable, especially if its entity depends on the total current.
description: 22 pages, 5 figures
ОТДЕЛЬНЫЕ АСПЕКТЫ СОВЕРШЕНСТВОВАНИЯ УГОЛОВНО-ПРАВОВОГО ЗАКОНОДАТЕЛЬСТВА РОССИИ В УСЛОВИЯХ ЦИФРОВИЗАЦИИ ЭКОНОМИКИ
Creators: name: Юрий Николаевич Анашкин
name: Наталья Васильевна Михайленко
name: Владимир Владимирович Гончар
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: цифровизация
цифровая экономика
цифровизация экономики
киберпреступления
компьютерные преступления
уголовно-правовые нормы
стратегия
реформирование
уголовная политика

description: Рассматривается необходимость реформирования отдельных норм Уголовного кодекса Российской Федерации в условиях нарастающих процессов цифровизации экономики. На основе проведенного анализа современных положений национального законодательства России разработаны предложения по реформированию некоторых статей Уголовного кодекса, а также предложены отдельные направления совершенствования уголовно-правовой политики. Уделено внимание исследованию стратегии развития информационного общества в Российской Федерации.
What are the Best Hierarchical Descriptors for Complex Networks?
Creators: name: Costa, Luciano da F.
name: Andrade, Roberto F. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This work reviews several hierarchical measurements of the topology of complex networks and then applies feature selection concepts and methods in order to quantify the relative importance of each measurement with respect to the discrimination between four representative theoretical network models, namely Erdös-Rényi, Barabási-Albert, Watts-Strogatz as well as a geographical type of network. The obtained results confirmed that the four models can be well-separated by using a combination of measurements. In addition, the relative contribution of each considered feature for the overall discrimination of the models was quantified in terms of the respective weights in the canonical projection into two dimensions, with the traditional clustering coefficient, hierarchical clustering coefficient and neighborhood clustering coefficient resulting particularly effective. Interestingly, the average shortest path length and hierarchical node degrees contributed little for the separation of the four network models.
description: 9 pages, 4 figures
УКРЕПЛЕНИЕ МЕЖДУНАРОДНОГО ПОЛИЦЕЙСКОГО СОТРУДНИЧЕСТВА В СВЕТЕ ВЫЗОВОВ И УГРОЗ СО СТОРОНЫ ТРАНСНАЦИОНАЛЬНОЙ ОРГАНИЗОВАННОЙ ПРЕСТУПНОСТИ
Creators: name: Юлия Владимировна Пузырева
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: транснациональная организованная преступность
система безопасности
международное полицейское сотрудничество
Интерпол
Европол
Африпол

description: В статье проведен анализ актуальных направлений сотрудничества государств-членов Интерпола по противодействию транснациональной организованной преступности в свете обеспечения глобальной системы безопасности, а также рассмотрены вопросы укрепления регионального полицейского партнерства под эгидой Интерпола в соответствии с региональными правоохранительными приоритетами и растущими потребностями своих государств-членов.
Situational control and well-being in the institutionalized elderly
Creators: name: Lavoie, Cora Emily Marie
Publisher: name: University of British Columbia
Year: 2010

description: This descriptive correlational study was designed to examine the relationship between situational control, and both psychological and physical well-being, in the institutionalized elderly. A convenience sample of 52 elderly institutionalized subjects was selected from two intermediate care facilities. The subjects completed the Perceived Weil-Being Scale, the Situational Control Of Daily Activities Scale, and the Subject Information Sheet. All residents were found to have an overall perception of situational control. However, residents perceived a lack of control for the daily activities of eating and grooming. The majority of residents obtained a moderately high score on the psychological well-being and physical well-being scales. No significant relationship was found between situational control and psychological well-being, or situational control and physical well-being. A significant positive relationship was found between psychological well-being and physical well-being.
Is There a Quad Problem among Optical Gravitational Lenses?
Creators: name: Oguri, Masamune
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Most of optical gravitational lenses recently discovered in the Sloan Digital Sky Survey Quasar Lens Search (SQLS) have two-images rather than four-images, in marked contrast to radio lenses for which the fraction of four-image lenses (quad fraction) is quite high. We revisit the quad fraction among optical lenses by taking the selection function of the SQLS into account. We find that the current observed quad fraction in the SQLS is indeed lower than, but consistent with, the prediction of our theoretical model. The low quad fraction among optical lenses, together with the high quad fraction among radio lenses, implies that the quasar optical luminosity function has a relatively shallow faint end slope.
description: 9 pages, 4 figures, invited contribution to appear in New Journal of Physics (Focus on Gravitational Lensing)
ПРОБЛЕМЫ РОСТА ПРЕСТУПНОЙ АКТИВНОСТИ В СРЕДЕ ТРУДОВЫХ МИГРАНТОВ НА ФОНЕ ПАНДЕМИИ КОРОНАВИРУСНОЙ ИНФЕКЦИИ
Creators: name: Яков Михайлович Хаминский
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: трудовая миграция
потребность «заимствованного труда»
рост безработицы в среде гастарбайтеров
противоправные действия

description: Рассматриваются вопросы роста преступности в среде мигрантов, вызванной резким ростом безработицы в Российской Федерации на фоне пандемии коронавируса нового типа.
Hybrid Curvatons from Broken Symmetry
Creators: name: Matsuda, Tomohiro
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a new general mechanism for generating curvature perturbations after inflation. Our model is based on the simple assumption that a field that starts to oscillate after inflation has a potential characterized by an underlying global symmetry that is slightly or badly broken. Inhomogeneous preheating occurs due to the oscillation with the broken symmetry. Unlike the traditional curvaton model, we will not identify the curvaton with the oscillating field. The curvaton is identified with the preheat field that could be either a scalar, vector, or fermionic field. We introduce an explicit mass term for the curvaton, which is important for later evolution and the decay. Our present model represents the simplest example of the hybrid of the curvatons and inhomogeneous preheating.
description: 21pages, 5 figures, accepted for publication in JHEP
ОРГАНИЗАЦИЯ ДЕЯТЕЛЬНОСТИ ПОДРАЗДЕЛЕНИЙ ПРАВООХРАНИТЕЛЬНЫХ ОРГАНОВ МВД РФ В ПРОТИВОДЕЙСТВИИ ПРЕСТУПЛЕНИЯМ, СВЯЗАННЫМ С ОБОРОТОМ НАРКОТИЧЕСКИХ СРЕДСТВ И ИХ ПРЕКУРСОРОВ
Creators: name: Вячеслав Викторович Зыков
name: Александр Леонидович Вострокнутов
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: история
функции и задачи подразделений по противодействию преступлениям
связанным с оборотом наркотических средств и их прекурсоров
подразделения специального назначения «Гром»

description: Описаны основные методы организация деятельности и подготовки подразделений специального назначения правоохранительных органов МВД РФ по противодействию преступлениям, связанным с оборотом наркотических средств и их прекурсоров.
НЕКОТОРЫЕ ОСОБЕННОСТИ РАССМОТРЕНИЯ ДЕЛ ОБ АДМИНИСТРАТИВНЫХ ПРАВОНАРУШЕНИЯХ, СОВЕРШЕННЫХ НЕСОВЕРШЕННОЛЕТНИМИ
Creators: name: Наталья Владимировна Малахова
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: несовершеннолетний гражданин
рассмотрение дела об административном правонарушении
комиссия по делам несовершеннолетних и защите их прав
профилактика административных правонарушений

description: Анализируются вопросы, связанные с особенностями рассмотрения дел об административных правонарушениях в отношении несовершеннолетних. Основное внимание уделяется специфике их правового статуса, защите прав и законных интересов при привлечении к административной ответственности.
Specific heat of the mixed spin-1/2 and spin-S Ising model with a rope ladder structure
Creators: name: Kissova, Jana
name: Strecka, Jozef
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The mixed spin-1/2 and spin-S (S>1/2) Ising model on a rope ladder is examined by combining two exact analytical methods. By the decoration-iteration mapping transformation, this mixed-spin system is firstly transformed to a simple spin-1/2 Ising model on the two-leg ladder, which is then exactly solved by the standard transfer-matrix method. The thermal variations of the zero-field specific heat are discussed in particular.
description: 4 pages, 2 figures, presented at conference CSMAG07, 9.-12. July 2007, Kosice, Slovakia, to be published in Acta Physica Polonica A
ЭЛЕКТРОННЫЙ ДОКУМЕНТООБОРОТ В ПРАВООХРАНИТЕЛЬНЫХ ОРГАНАХ: СОСТОЯНИЕ И ПРОБЛЕМЫ ПРАВОВОЙ РЕГЛАМЕНТАЦИИ
Creators: name: Мухарбек Магомедгиреевич Дикажев
name: Роман Борисович Осокин
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: информационные технологии
электронный документ
электронный документооборот
электронная (цифровая) подпись
управление
правоохранительные органы
органы внутренних дел

description: Одним из магистральных направлений современной правовой политики российского государства является «цифровизация» делопроизводства системы правоохранительных органов Российской Федерации, в том числе МВД России. Тем не менее, внедрение инновационных средств электронного документооборота в традиционный порядок осуществления внутрии межведомственного обмена служебной и процессуальной документацией встречается на практике с видами системных проблем: 1) организационным; 2) технологическим; 3) правовым, преодоление которых требует срочных и решительных мер как со стороны отечественного законодателя, так и со стороны системы российских правоохранительных органов.
МЕТОДИЧЕСКИЕ ОСНОВЫ СУДЕБНО-ПОЧЕРКОВЕДЧЕСКОЙ ИДЕНТИФИКАЦИОННОЙ ЭКСПЕРТИЗЫ КИТАЙСКИХ ИЕРОГЛИФИЧЕСКИХ РУКОПИСЕЙ: ВОЗМОЖНОСТИ РЕАЛИЗАЦИИ КОМПЛЕКСНОГО ПОДХОДА
Creators: name: Павел Алексеевич Четверкин
name: Станислав Михайлович Бобовкин
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: почерковедческая экспертиза
методика исследования
идентификация исполнителя
китайские рукописи
иероглифы
комплексный подход

description: Освещаются особенности применения комплексного подхода при судебно-почерковедческом исследовании китайских иероглифических рукописей. Предложен алгоритм действий эксперта(ов) при производстве соответствующей экспертизы. На основании экспертно-криминалистической практики обосновывается потребность участия лингвиста на этапе назначения и производства экспертизы.
Trace dynamics, and a ground state in spontaneous quantum gravity
Creators: name: Roy, Abhinash Kumar
name: Sahu, Anmol
name: Singh, Tejinder P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We have recently proposed a Lagrangian in trace dynamics, to describe a possible unification of gravity, Yang-Mills fields, and fermions, at the Planck scale. This Lagrangian for the unified entity - called the aikyon - is invariant under global unitary transformations, and as a result possesses a novel conserved charge, known as the Adler-Millard charge. In the present paper, we derive an eigenvalue equation, analogous to the time-independent Schrödinger equation, for the Hamiltonian of the theory. We show that in the emergent quantum theory, the energy eigenvalues of the aikyon are characterised in terms of a fundamental frequency times Planck's constant. The eigenvalues of this equation can, in principle, determine the values of the parameters of the standard model. We also report a ground state, in this theory of spontaneous quantum gravity, which could characterise a non-singular initial epoch in quantum cosmology.
description: 18 pages, published in Mod. Phys. Lett. A
General quantum phase estimation and calibration of a timepiece in a quantum dot system
Creators: name: Dong, Ping
name: Cao, Zhuo-Liang
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a physical scheme for implementing quantum phase estimation via weakly coupled double quantum-dot molecules embedded in a microcavity. During the same process of implementation, we can also realize the calibration of a timepiece based on the estimated phase. We use the electron-hole pair states in coupled double quantum-dot molecules to encode quantum information, where the requirement that two quantum dots are exactly identical is not necessary. Our idea can also be generalized to other systems, such as atomic, trapped ion and linear optics system.
description: 4 pages and 2 figures
The spin-1/2 Ising model on the bow-tie lattice as an exactly soluble free-fermion model
Creators: name: Strecka, Jozef
name: Canova, Lucia
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The spin-1/2 Ising model on the bow-tie lattice is exactly solved by establishing a precise mapping relationship with its corresponding free-fermion eight-vertex model. Ground-state and finite-temperature phase diagrams are obtained for the anisotropic bow-tie lattice with three different exchange interactions along three different spatial directions.
description: 4 pages, 2 figures, presented at 13th Czech and Slovak Conference on Magnetism (CSMAG'07), 9.-12. July 2007, Kosice, Slovakia, to be published in Acta Physica Polonica A
Reentrant transitions of Ising-Heisenberg ferromagnet on a triangular lattice with diamond-like decorations
Creators: name: Jascur, Michal
name: Strecka, Jozef
name: Canova, Lucia
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The mixed spin-1/2 and spin-1 Ising-Heisenberg ferromagnet on the decorated triangular lattice consisting of inter-connected diamonds is investigated within the framework of an exact decoration-iteration mapping transformation. It is shown that the diamond-like decoration by a couple of the Heisenberg spins gives rise to a diverse critical behaviour including reentrant phase transitions with two consecutive critical points.
description: 4 pages, 2 figures, presented at 13th Czech and Slovak Conference on Magnetism (CSMAG'07), 9.-12. July 2007, Kosice, Slovakia, to be published in Acta Physica Polonica A
Crystal chemistry and ab initio prediction of ultra-hard rhombohedral B2N2 and BC2N
Creators: name: Matar, Samir F.
name: Solozhenko, Vladimir L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: New ultra-hard rhombohedral B2N2 and BC2N - or hexagonal B6N6 and B3C6N3 - are derived from 3R graphite based on crystal chemistry rationale schematizing a mechanism for 2D => 3D transformation. Full unconstrained geometry optimizations leading to ground state energy structures and energy derived quantities as energy-volume equation of states (EOS) were based on computations within the density functional theory (DFT) with generalized gradient approximation (GGA) for exchange-correlation (XC) effects. The new binary and ternary phases are characterized by tetrahedral stacking alike diamond, visualized with charge density representations, and illustrating ion characters. Atom averaged total energies are similar between cubic BN and rh-B2N2 on one hand, and larger stabilization of rhombohedral BC2N versus cubic and orthorhombic forms (in literature assessed from favored C-C and B-N bonding), on the other hand. The electronic band structures are characteristic of insulators with Egap ~ 5 eV. Both phases are characterized by large bulk and shear moduli and very high hardness values i.e. HV(rh-B2N2) = 74 GPa and HV(rh-BC2N) = 87 GPa.
Wavelet block thresholding for samples with random design: a minimax approach under the $L^p$ risk
Creators: name: Chesneau, Christophe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G07, 60K35 (Primary); 62G20 (Secondary)

description: We consider the regression model with (known) random design. We investigate the minimax performances of an adaptive wavelet block thresholding estimator under the $\mathbb{L}^p$ risk with $p\ge 2$ over Besov balls. We prove that it is near optimal and that it achieves better rates of convergence than the conventional term-by-term estimators (hard, soft,...).
description: Published at http://dx.doi.org/10.1214/07-EJS067 in the Electronic Journal of Statistics (http://www.i-journals.org/ejs/) by the Institute of Mathematical Statistics (http://www.imstat.org)
К ВОПРОСУ О ФАКТОРАХ ОБЪЕКТИВНОГО ХАРАКТЕРА, ВЛИЯЮЩИХ НА ФОРМИРОВАНИЕ ДВИГАТЕЛЬНОГО НАВЫКА ПИСЬМА
Creators: name: Любовь Юрьевна Захарова
name: Роза Ватановна Бондаренко
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: письмо
почерк
письменно-двигательный навык
функционально-динамический комплекс
факторы объективного характера
методика обучения письму

description: Рассматриваются исследования, связанные с формированием письменно-двигательного навыка и методами обучения письму в начальных классах.
К ВОПРОСУ О СОВРЕМЕННЫХ ВОЗМОЖНОСТЯХ ИССЛЕДОВАНИЯ ОБЪЕКТОВ СУДЕБНО-ПОЧЕРКОВЕДЧЕСКОЙ ЭКСПЕРТИЗЫ
Creators: name: Анастасия Николаевна Охлупина
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: искусственный интеллект
интеллектуальные системы
судебная экспертиза
судебно-почерковедческая экспертиза
ДСМ-метод

description: Рассматривается вопрос применения интеллектуальных систем, изучаемых под эгидой искусственного интеллекта, в целях оптимизации проведения судебно-почерковедческих исследований и получения новых исследовательских данных в этой области. Делается акцент на популярность темы развития продуктов искусственного интеллекта в нашей стране сегодня. Описываются некоторые уже полученные результаты, имеющиеся в почерковедении в этом направлении исследований. Затрагивается проблема наличия некого психологического барьера, связанного со сложностями принятия человеком в целом новой сложной информации. Обосновывается необходимость продолжения исследовательской работы в данном направлении.
New Equation of Nonrelativistic Physics and Theory of Dark Matter
Creators: name: Musielak, Z. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Two infinite sets of Galilean invariant equations are derived using the irreducible representations of the orthochrous extended Galilean group. It is shown that one set contains the Schrödinger equation, which is the fundamental equation for ordinary matter, and the other set has a new asymmetric equation, which is proposed to be the fundamental equation for dark matter. Using this new equation, a theory of dark matter is developed and its profound physical implications are discussed. This theory explains the currently known properties of dark matter and also predicts a detectable gravitational radiation.
description: 12 pages
ОСОБЕННОСТИ ОЦЕНКИ ЗАКЛЮЧЕНИЙ ПОВТОРНЫХ ЭКСПЕРТИЗ ДОКУМЕНТОВ
Creators: name: Игорь Николаевич Усков
name: Виктор Васильевич Пономарев
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: повторная экспертиза
исследование документов
субъекты оценивания
основания назначения
методические особенности
принятие решения
рецензирование заключений эксперта
заключение специалиста о рецензировании
приобщение к материалам дела

description: В настоящей статье изложена информация о особенностях оценки заключений экспертов, составляемых по итогам производства повторных экспертиз документов. Рассмотрены проблемы: связанные с правовым регулированием данной сферы деятельности, определения значимости оснований назначения повторных экспертиз документов, оценки обоснованности выводов в экспертных исследованиях документов, установления причин расхождения в выводах первичной и повторной экспертиз.
Improved Coherence Index-Based Bound in Compressive Sensing
Creators: name: Stankovic, Ljubisa
name: Brajovic, Milos
name: Mandic, Danilo
name: Stankovic, Isidora
name: Dakovic, Milos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Within the Compressive Sensing (CS) paradigm, sparse signals can be reconstructed based on a reduced set of measurements. Reliability of the solution is determined by the uniqueness condition. With its mathematically tractable and feasible calculation, coherence index is one of very few CS metrics with a considerable practical importance. In this paper, we propose an improvement of the coherence based uniqueness relation for the matching pursuit algorithms. Starting from a simple and intuitive derivation of the standard uniqueness condition based on the coherence index, we derive a less conservative coherence index-based lower bound for signal sparsity. The results are generalized to the uniqueness condition of the $l_0$-norm minimization for a signal represented in two orthonormal bases.
description: 5 pages, 1 figure
КРИМИНАЛИСТИЧЕСКАЯ ХАРАКТЕРИСТИКА ПРЕСТУПНОГО БАНКРОТСТВА
Creators: name: Георгий Игоревич Сафонов
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: криминальное банкротство
криминалистическая характеристика
экономическая безопасность
несостоятельность
элементы

description: Анализируются основные элементы криминалистической характеристики криминальных банкротств. Значение криминалистической характеристики криминальных банкротств заключается в том, что ее правильное понимание и применение способствует верному определению вектора расследования конкретного преступления. Это объясняется тем, что для целей расследования преступлений в сфере криминального банкротства важно правильно определить все значимые элементы, входящие в структуру криминалистической характеристики.
Strain gradient induced polarization in SrTiO3 single crystals
Creators: name: Zubko, P.
name: Catalan, G.
name: Buckley, A.
name: Welche, P. R. L.
name: Scott, J. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Piezoelectricity is inherent only in noncentrosymmetric materials, but a piezoelectric response can also be obtained in centrosymmetric crystals if subjected to inhomogeneous deformation. This phenomenon, known as flexoelectricity, affects the functional properties of insulators, particularly thin films of high permittivity materials. We have measured strain-gradient-induced polarization in single crystals of paraelectric SrTiO$_3$ as a function of temperature and orientation down to and below the 105 K phase transition. Estimates were obtained for all the components of the flexoelectric tensor, and calculations based on these indicate that local polarization around defects in SrTiO$_3$ may exceed the largest ferroelectric polarizations. A sign reversal of the flexoelectric response detected below the phase transition suggests that the ferroelastic domain walls of SrTiO$_3$ may be polar.
description: 4 pages, 3 figures, 1 table
АКТУАЛЬНЫЕ ПРОБЛЕМЫ ДАКТИЛОСКОПИЧЕСКОЙ ЭКСПЕРТИЗЫ В СОЦИАЛИСТИЧЕСКОЙ РЕСПУБЛИКЕ ВЬЕТНАМ
Creators: name: Фан Тхань Донг
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: дактилоскопия
специальные знания
папиллярные узоры
пригодность для идентификации
идентификационные и диагностические задачи
диагностика
экспертно-криминалистические учреждения

description: Рассмотрено современное состояние производства дактилоскопических экспертиз в Социалистической Республике Вьетнам. Проведенный анализ экспертной практики позволил автору выявить основные актуальные проблемы, имеющие место при изъятии следов рук с мест происшествий и производстве дактилоскопических экспертиз в экспертно-криминалистических учреждениях. Сравнительным анализом применяемых методик для производства дактилоскопических экспертиз в Социалистической Республике Вьетнам и Российской Федерации выявлены некоторые особенности, на основе которых автором предлагаются рекомендации, направленные на улучшение качества и эффективности производства этих экспертиз в Социалистической Республике Вьетнам.
Additional file 3 of Quantitative CT screening improved lumbar BMD evaluation in older patients compared to dual-energy X-ray absorptiometry
Creators: name: Lin, Wentao
name: He, Chaoqin
name: Xie, Faqin
name: Chen, Tao
name: Zheng, Guanghao
name: Yin, Houjie
name: Chen, Haixiong
name: Wang, Zhiyun
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified

description: Additional file 3: Supplemental Table 3. AUCs with 95% CIs, Youden’s indices, and the resulting QCT/DXA thresholds and sensitivity and specificity values.
Biexciton stability in carbon nanotubes
Creators: name: Kammerlander, David
name: Prezzi, Deborah
name: Goldoni, Guido
name: Molinari, Elisa
name: Hohenester, Ulrich
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have applied the quantum Monte Carlo method and tight-binding modelling to calculate the binding energy of biexcitons in semiconductor carbon nanotubes for a wide range of diameters and chiralities. For typical nanotube diameters we find that biexciton binding energies are much larger than previously predicted from variational methods, which easily brings the biexciton binding energy above the room temperature threshold.
description: revtex4, final, twocolumn. to be published in Phys.Rev.Let. 5 pages 3 figures
Interactions between the large-scale radio structures and the gas in a sample of optically selected type 2 quasars
Creators: name: Villar-Martin, Montserrat
name: Emonts, Bjorn
name: Lavers, Antonio Cabrera
name: Bellocchi, Enrica
name: Herrero, Almudena Alonso
name: Humphrey, Andrew
name: de Oliveira, Bruno Dall'Agnol
name: Storchi-Bergmann, Thaisa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The role of radio mode feedback in non radio-loud quasars needs to be explored in depth to determine its true importance. Its effects can be identified based on the evidence of interactions between the radio structures and the ambient ionised gas. We investigate this in a sample of 13 optically selected type-2 quasars (QSO2) at z<0.2 with FIRST radio detections. None are radio loud. All show complex optical morphologies, with signs of distortion across tens of kpc due to mergers/interactions. The radio luminosity has an AGN component in 11/13 QSO2. It is spatially extended in 9 of them (jets/lobes/bubbles/other). The maximum sizes are in the range few kpc to ~500 kpc. Evidence for radio-gas interactions exist in 10/13 QSO2; that is, all but one with confirmed AGN radio components. The interactions are identified across different spatial scales, from the nuclear narrow line region up to tens of kpc from the AGN. Large scale low/modest power radio sources can exist in radio-quiet QSO2, which can provide a source of feedback on scales of the spheroidal component of galaxies and well into the circumgalactic medium in systems where radiative mode feedback is expected to dominate.
description: 32 pages, 39 figures. Accepted for publication in Astronomy & Astrophysics
title: การมีส่วนร่วมในการจัดการทรัพยากรน้ำของประชาชนในชุมชนบ้านระโยง ตำบลท่าสว่าง อำเภอเมือง จังหวัดสุรินทร์
Creators: name: วชิราพร วิมานรัมย์
Publisher: name: สถาบันวิชาการเพื่อพัฒนาท้องถิ่น
publisherIdentifierScheme: ROR
Year: 2024
Subjects: การมีส่วนร่วม
การจัดการทรัพยากรน้ำ
ประชาชน

description: วารสารวิชาการพัฒนาท้องถิ่น, 3, 1, 49-58
ЦИФРОВИЗАЦИЯ РЫНКА ЮРИДИЧЕСКИХ УСЛУГ
Creators: name: Павел Романович Крупкин
name: Владимир Геннадьевич Булгаков
name: Елена Валерьевна Булгакова
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: цифровые технологии
большие данные
искусственный интеллект
облачные вычисления
нейротехнологии
смарт-контракт
фриланс
киберправосудие

description: Приводится анализ методов и средств предоставления юридических услуг в условиях глобальной цифровизации. Предлагаются готовые решения по удаленной работе юриста, исследуют преимущества и недостатки предоставления юридических услуг в новом формате. Глубокий анализ зарубежного опыта перехода самозанятых юристов на цифровые платформы, предоставляющие широкие возможности удаленной работы, позволяют внедрить эти технологии на отечественном рынке юридических услуг. Авторы статьи предлагают модель цифровой нейро-смарт платформы для оказания юридических услуг, которая обеспечит работой юристов в условиях распространения коронавирусной инфекции. Представляется, что наиболее востребованной указанная платформа будет для юристов с ограниченными возможностями, а также для начинающих юристов, которые делают свои первые шаги в профессии. Авторы рассматривают создание цифровой нейро-смарт платформы для юристов-фрилансеров, в качестве элемента системы киберправосудия в России.
К ВОПРОСУ ОБ ОСНОВНЫХ НАПРАВЛЕНИЯХ СОВЕРШЕНСТВОВАНИЯ ДЕЯТЕЛЬНОСТИ ОРГАНОВ ВНУТРЕННИХ ДЕЛ
Creators: name: Галина Николаевна Суслова
name: Венера Наимовна Амельчакова
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: органы внутренних дел
полиция
реформирование

description: Рассматриваются вопросы совершенствования деятельности органов внутренних дел на современном этапе их реформирования.
НЕКОТОРЫЕ МЕТОДОЛОГИЧЕСКИЕ ВОПРОСЫ ИСПОЛЬЗОВАНИЯ БАЗОВЫХ ЭЛЕМЕНТОВ СОВРЕМЕННЫХ ИНФОРМАЦИОННЫХ ТЕХНОЛОГИЙ В СОВЕРШЕНСТВОВАНИИ УПРАВЛЕНЧЕСКОЙ ДЕЯТЕЛЬНОСТИ ОРГАНОВ ВНУТРЕННИХ ДЕЛ
Creators: name: Владимир Валерьевич Бубнов
name: Наталья Михайловна Дубинина
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: управленческая деятельность
информационные технологии управления
информационные системы управления

description: В настоящей статье обсуждаются некоторые методологические вопросы использования информационных технологий в совершенствовании управленческой деятельности органов внутренних дел. Даются характеристики понятий: управленческая деятельность, информационные технологии управления, информационные системы управления.
The variable mass loss of the AGB star WX Psc as traced by the CO J=1-0 through 7-6 lines and the dust emission
Creators: name: Decin, L.
name: Hony, S.
name: de Koter, A.
name: Molenberghs, G.
name: Dehaes, S.
name: Markwick-Kemper, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Low and intermediate mass stars lose a significant fraction of their mass through a dust-driven wind during the Asymptotic Giant Branch (AGB) phase. Recent studies show that winds from late-type stars are far from being smooth. Mass-loss variations occur on different time scales, from years to tens of thousands of years. The variations appear to be particularly prominent towards the end of the AGB evolution. The occurrence, amplitude and time scale of these variations are still not well understood. The goal of our study is to gain insight into the structure of the circumstellar envelope (CSE) of WX Psc and map the possible variability of the late-AGB mass-loss phenomenon. We have performed an in-depth analysis of the extreme infrared AGB star WX Psc by modeling (1) the CO J=1-0 through 7-6 rotational line profiles and the full spectral energy distribution (SED) ranging from 0.7 to 1300 micron. We hence are able to trace a geometrically extended region of the CSE. Both mass-loss diagnostics bear evidence of the occurrence of mass-loss modulations during the last ~2000 yr. In particular, WX Psc went through a high mass-loss phase (Mdot~5e-5 Msun/yr) some 800 yr ago. This phase lasted about 600 yr and was followed by a long period of low mass loss (Mdot~5e-8 Msun/yr). The present day mass-loss rate is estimated to be ~6e-6 Msun/yr. The AGB star WX Psc has undergone strong mass-loss rate variability on a time scale of several hundred years during the last few thousand years. These variations are traced in the strength and profile of the CO rotational lines and in the SED. We have consistently simulated the behaviour of both tracers using radiative transfer codes that allow for non-constant mass-loss rates.
description: 12 pages, accepted for publication in A&A
ОСОБЕННОСТИ ДЕЯТЕЛЬНОСТИ НАРОДНЫХ ДРУЖИН И ВНЕШТАТНЫХ СОТРУДНИКОВ ПОЛИЦИИ В ОХРАНЕ ОБЩЕСТВЕННОГО ПОРЯДКА
Creators: name: Светлана Викторовна Калинина
Publisher: name: Вестник Московского университета МВД России
Year: 2020
Subjects: народные дружины
внештатные сотрудники полиции
взаимодействие
общественный порядок
пресечение правонарушений

description: Происходящие в нашем обществе социально-экономические и политические преобразования позволили по-новому взглянуть на роль граждан в охране общественного порядка и обеспечении общественной безопасности. В статье раскрываются вопросы организационно-правовых основ деятельности полиции по привлечению граждан к участию в охране общественного порядка в рамках реализации Федерального закона от 02 апреля 2014 г. № 44-ФЗ «Об участии граждан в охране общественного порядка». На основе системного подхода, а также всестороннего анализа нормативных правовых актов и правоприменительной практики предпринята попытка подготовить структурированную информацию, определяющую правовые и организационные основы взаимодействия полиции с народными дружинами и внештатными сотрудниками полиции в охране общественного порядка.
Polynomial identities and noncommutative versal torsors
Creators: name: Aljadeff, Eli
name: Kassel, Christian
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16R50, 16W30, 16S35, 16S38, 16S40, 16H05, 16E99, 17B37, 55R10, 58B32, 81R50, 81R60

description: To any cleft Hopf Galois object, i.e., any algebra H[t] obtained from a Hopf algebra H by twisting its multiplication with a two-cocycle t, we attach two "universal algebras" A(H,t) and U(H,t). The algebra A(H,t) is obtained by twisting the multiplication of H with the most general two-cocycle u formally cohomologous to t. The cocycle u takes values in the field of rational functions on H. By construction, A(H,t) is a cleft H-Galois extension of a "big" commutative algebra B(H,t). Any "form" of H[t] can be obtained from A(H,t) by a specialization of B(H,t) and vice versa. If the algebra H[t] is simple, then A(H,t) is an Azumaya algebra with center B(H,t). The algebra U(H,t) is constructed using a general theory of polynomial identities that we set up for arbitrary comodule algebras; it is the universal comodule algebra in which all comodule algebra identities of H[t] are satisfied. We construct an embedding of U(H,t) into A(H,t); this embedding maps the center Z(H,t) of U(H,t) into B(H,t) when the algebra H[t] is simple. In this case, under an additional assumption, A(H,t) is isomorphic to B(H,t) \otimes_{Z(H,t)} U(H,t), thus turning A(H,t) into a central localization of U(H,t). We work out these constructions in full detail for the four-dimensional Sweedler algebra.
description: 39 pages
Finite temperature quantum field theory on non compact domains and application to delta interactionsinteractions in three dimensions
Creators: name: Spreafico, Mauro
name: Zerbini, Sergio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 58J52

description: We use relative zeta functions technique of W. Muller \cite{Mul} to extend the classical decomposition of the zeta regularized partition function of a finite temperature quantum field theory on a ultrastatic space-time with compact spatial section to the case of non compact spatial section. As an application, we study the case of Schrödinger operators with delta like potential, as described by Albeverio & alt. in \cite{AGHH}.
description: 10 pages, Latex file
The effect of a planet on the dust distribution in a 3D protoplanetary disk
Creators: name: Fouchet, L.
name: Maddison, S. T.
name: Gonzalez, J. -F.
name: Murray, J. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We investigate the behaviour of dust in protoplanetary disks under the action of gas drag in the presence of a planet. Our goal is twofold: to determine the spatial distribution of dust depending on grain size and planet mass, and therefore to provide a framework for interpretation of coming observations and future studies of planetesimal growth. Method: We numerically model the evolution of dust in a protoplanetary disk using a two-fluid (gas + dust) Smoothed Particle Hydrodynamics (SPH) code, which is non-self-gravitating and locally isothermal. The code follows the three dimensional distribution of dust in a protoplanetary disk as it interacts with the gas via aerodynamic drag. In this work, we present the evolution of a minimum mass solar nebula (MMSN) disk comprising 1% dust by mass in the presence of an embedded planet. We run a series of simulations which vary the grain size and planetary mass to see how they affect the resulting disk structure. Results: We find that gap formation is much more rapid and striking in the dust layer than in the gaseous disk and that a system with a given stellar, disk and planetary mass will have a completely different appearance depending on the grain size. For low mass planets in our MMSN disk, a gap can open in the dust disk while not in the gas disk. We also note that dust accumulates at the external edge of the planetary gap and speculate that the presence of a planet in the disk may enhance the formation of a second planet by facilitating the growth of planetesimals in this high density region.
description: 13 pages, 12 figures. Accepted for publication in Astronomy & Astrophysics
Pressure-induced structural transitions triggering dimensional crossover in lithium purple bronze Li0.9M6O17
Creators: name: Tran, M. K.
name: Akrap, A.
name: Levallois, J.
name: Teyssier, J.
name: Schouwink, P.
name: Besnard, C.
name: Lerch, P.
name: Allen, J. W.
name: Greenblatt, M.
name: van der Marel, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: At ambient pressure, lithium molybdenum purple bronze (Li0.9Mo6O17) is a quasi-one dimensional solid in which the anisotropic crystal structure and the linear dispersion of the underlying bands produced by electronic correlations possibly bring about a rare experimental realization of Tomomaga-Luttinger liquid physics. It is also the sole member of the broader purple molybdenum bronzes family where a Peierls instability has not been identified at low temperatures. The present study reports a pressure-induced series of phase transitions between 0 and 12 GPa. These transitions are strongly reflected in infrared spectroscopy, Raman spectroscopy, and x-ray diffraction. The most dramatic effect seen in optical conductivity is the metallization of the c-axis, concomitant to the decrease of conductivity along the b-axis. This indicates that high pressure drives the material away from its quasi-one dimensional behavior at ambient pressure. While the first pressure-induced structure of the series is resolved, the identification of the underlying mechanisms driving the dimensional change in the physics remains a challenge.
description: 10 pages, 12 figures
Conoscopic Patterns for Optically Uniaxial Gyrotropic Crystals in the Vicinity of Isotropic Point
Creators: name: Vasylkiv, Yu.
name: Nastishin, Yu.
name: Vlokh, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We have presented computer simulations of conoscopic patterns occurring in optically uniaxial gyrotropic crystals in the vicinity of isotropic point for a number of sets of crystal parameters and orientations. The appearance of special directions characterized by equalization of linear and circular birefringences has been revealed.
description: 12 pages, 12 figures