cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Оценка координат беспилотных летательных аппаратов дальномерным методом с использованием нелинейной марковской фильтрации, устойчивой к аномальным измерениям
Creators: name: ., Д.Б. Волгушев – инженер, ООО «СТЦ» (Санкт-Петербург) E-mail: d.volgushev@yandex.ru М.Н. Чесноков – д.т.н., проф., зам. начальника отдела, ООО «СТЦ» (Санкт-Петербург) E-mail: chesnokovmn@yandex.ru А.А. Соловьев – инженер, ООО «СТЦ» (Санкт-Петербург) E-mail: alanight@mail.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. При использовании беспилотных летательных аппаратов (БЛА) вне зависимости от решаемых ими задач требуется определять их местоположение (координаты) в реальном масштабе времени. Для этого используются гло-бальные спутниковые системы навигации ГЛОНАСС/GPS в сочетании с системами бортовой инерциальной навигации. В условиях недоступности сигналов спутниковой навигации возникает необходимость в локальной навигационной системе (ЛНС). ЛНС может быть построена с использованием различных методов позиционирования БЛА, различающихся по типу измеряемого параметра. Наиболее распространенными являются дальномерные методы, основанные на измерении абсолютной или относительной дальности между опорными пунктами и объектом позиционирования, угломерные методы, основанные на
измерении угла прихода сигнала, и методы, основанные на измерении уровня принимаемого сигнала. При этом известные решения задачи оценки координат БЛА нельзя считать исчерпывающими, так как они не обладают достаточной общностью.
Цель. Провести синтез и анализ нелинейного рекуррентного фильтра для оценки координат БЛА дальномерным методом,
устойчивого к аномальным измерениям.
Результаты. На основе алгоритма нелинейной марковской фильтрации синтезирован нелинейный рекуррентный фильтр, ус-тойчивый к аномальным измерениям и предназначенный для оценки координат БЛА с использованием дальномерного метода местоопределения. Проведен сравнительный анализ точности оценивания координат синтезированным фильтром и расширенным фильтром Калмана при наличии и отсутствии аномальных измерений, а также анализ влияния на точность местоопределения БЛА характеристик локальной навигационной системы, использующей синтезированный фильтр.
Практическая значимость. Полученные результаты свидетельствуют о перспективности использованного подхода к синтезу фильтра для реализации локальной навигационной системы, использующей дальномерный метод местоопределения. Они легко обобщаются на более сложные модели движения БЛА и модели помех.
title: Способ построения малогабаритной гиперспектральной камеры для беспилотных летательных аппаратов
Creators: name: ., К.Р. Мудрак – начальник отдела, ООО «СТЦ» (Санкт-Петербург) E-mail: zzzmurdoczzz@bk.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Гиперспектральная камера, в отличие от обычных цветных фотокамер, позволяет определить спек-тральный состав объектов, находящихся в поле ее объектива, а не цвет объектов в базисе RGB (Red, Green, Blue). Частное применение гиперспектральной съемки – определение типа и состояния растительности, над которой производится съемка. Особенностью гиперспектральной съемки является возможность режекции из полученного изображения тех длин волн, которые имеют негативный характер. Например, известно, что на стыке оптических сред воздух–вода, происходит отражение и поглощение с преломлением различных длин волн. Для фото- или видеоизображения это проявляется как блик, который не-возможно устранить, так как он будет содержаться в пикселях трех опорных цветов.
Цель. Предложить способ построения малогабаритной гиперспектральной камеры для БЛА.
Результаты. Рассмотрен и проанализирован способ построения объектива гиперспектральной камеры малого габарита,
позволяющий рассчитать основные элементы объектива.
Практическая значимость. Предложен вариант применения на БЛА совмещенной системы из видеокамеры видимого диа-пазона и гиперспектральной камеры для реконструкции изображения без применения гиростабилизирующих систем.
Infective endocarditis by Nocardia species: a systematic review
Creators: name: Velidakis, Antonios
name: Degaitis, Fotios
name: Tsorbatzoglou, George
name: Ioannou, Petros
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Nocardiosis, is a potentially life-threatening disease, especially in immunocompromised individuals where it manifests as a disseminated disease. Infective Endocarditis (IE) is a rare disease with significant morbidity and mortality. Importantly, even though there are scarce data of IE by Nocardia spp. in the literature, a review adequately summarizing systematically all available evidence on the topic is lacking. The aim of this study was to systematically review all cases of IE by Nocardia spp. and describe the epidemiology, microbiology, clinical characteristics, treatment and outcomes of this infection. A systematic review of PubMed, Scopus and Cochrane library (through 7 December 2021) for studies providing epidemiological, clinical, microbiological as well as treatment data and outcomes of patients with IE by Nocardia spp. was performed. A total of 25 studies providing data for 26 patients were included. A prosthetic valve was present in 30.8%, while the most common microorganism was N. asteroides. Aortic valve was the most commonly infected intracardiac site, followed by the mitral valve. Diagnosis was most commonly performed with transthoracic echocardiography, while the diagnosis was made at autopsy in 11.5%. Co-trimoxazole, aminoglycosides and carbapenems were the most commonly used antimicrobials. Clinical cure was noted in 73.1%, while mortality was 26.9%. This systematic review thoroughly describes IE by Nocardia and provides information on epidemiology, clinical presentation, treatment and outcomes.
Quantum metrology: why entanglement?
Creators: name: Maccone, Lorenzo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show why and when entanglement is needed for quantum-enhanced precision measurements, and which type of entanglement is useful. We give a simple, intuitive construction that shows how entanglement transforms parallel estimation strategies into sequential ones of same precision. We employ this argument to generalize conventional quantum metrology, to identify a class of noise whose effects can be easily managed, and to treat the case of indistinguishable probes (such as interferometry with light).
description: 5 pages, 3 figures
Mass transfer in eccentric binary systems using the binary evolution code BINSTAR
Creators: name: Davis, P. J.
name: Siess, L.
name: Deschamps, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first calculations of mass transfer via RLOF for a binary system with a significant eccentricity using our new binary stellar evolution code. The study focuses on a 1.50+1.40 Msun main sequence binary with an eccentricity of 0.25, and an orbital period of about 0.7 d. The reaction of the stellar components due to mass transfer is analyzed, and the evolution of mass transfer during the periastron passage is compared to recent smooth particle hydrodynamics (SPH) simulations. The impact of asynchronism and non-zero eccentricity on the Roche lobe radius, and the effects of tidal and rotational deformation on the stars' structures, are also investigated. Calculations were performed using the state-of-the-art binary evolution code BINSTAR, which calculates simultaneously the structure of the two stars and the evolution of the orbital parameters. The evolution of the mass transfer rate during an orbit has a Gaussian-like shape, with a maximum at periastron, in qualitative agreement with SPH simulations. The Roche lobe radius is modified by the donor star's spin and the orbital eccentricity. This has a significant impact on both the duration and the rate of mass transfer. We find that below some critical rotation rate, mass transfer never occurs, while above some threshold, mass is transferred over the entire orbit. Tidal and rotational deformation of the donor star causes it to become over-sized, enhancing the mass transfer rate further by about a factor of ten, leading to non-conservative mass transfer. The modulation of mass transfer rate with orbital phase produces short-term variability in the surface luminosity and radius of each star. The longer-term behaviour shows, in accordance with studies of circular systems with radiative stars, that the donor becomes ever small and under-luminous, while the converse is the case for the accretor.
description: 13 pages, 9 figures, accepted for publication in A&A
BRST symmetry and $W$-algebra in higher derivative models
Creators: name: Banerjee, Rabin
name: Paul, Biswajit
name: Upadhyay, Sudhaker
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we discuss the (anti-)BRST symmetries and $W$-algebra of higher derivative theories of relativistic particles satisfying general gauge conditions. Using this formalism, the connection between the (anti-)BRST symmetries and $W$-algebra for the rigid relativistic particle is established. Incidentally, the full $W$-algebra emerges only when the anti-BRST transformations are considered in tandem with the BRST ones. Further, the BRST symmetry is made finite and coordinate-dependent. We show that such finite coordinate-dependent BRST symmetry changes the BRST invariant gauge-fixing fermion within the functional integration. This is exploited to connect two different arbitrary gauge conditions.
description: 14 pages, Latex, some changes in text, to appear in Phys. Rev. D
The Functional Measure for the In-In Path Integral
Creators: name: Kaya, Ali
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The in-in path integral of a scalar field propagating in a fixed background is formulated in a suitable function space. The free kinetic operator, whose inverse gives the propagators of the in-in perturbation theory, becomes essentially self adjoint after imposing appropriate boundary conditions. An explicit spectral representation is given for the scalar in the flat space and the standard propagators are rederived using this representation. In this way the subtle boundary path integral over the field configurations at the return time is handled straightforwardly. It turns out that not only the values of the forward (+) and the backward (-) evolving fields but also their time derivatives must be matched at the return time, which is mainly overlooked in the literature. This formulation also determines the field configurations that are included in the path integral uniquely. We show that some of the recently suggested instanton-like solutions corresponding to the stationary phases of the cosmological in-in path integrals can be rigorously identified as limits of sequences in the function space.
description: 29 pages, 5 figures, revtex4-1, v2: comments and a reference added
Network Inference with Hidden Units
Creators: name: Tyrcha, Joanna
name: Hertz, John
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We derive learning rules for finding the connections between units in stochastic dynamical networks from the recorded history of a ``visible'' subset of the units. We consider two models. In both of them, the visible units are binary and stochastic. In one model the ``hidden'' units are continuous-valued, with sigmoidal activation functions, and in the other they are binary and stochastic like the visible ones. We derive exact learning rules for both cases. For the stochastic case, performing the exact calculation requires, in general, repeated summations over an number of configurations that grows exponentially with the size of the system and the data length, which is not feasible for large systems. We derive a mean field theory, based on a factorized ansatz for the distribution of hidden-unit states, which offers an attractive alternative for large systems. We present the results of some numerical calculations that illustrate key features of the two models and, for the stochastic case, the exact and approximate calculations.
Lie solvable enveloping algebras of characteristic two
Creators: name: Siciliano, Salvatore
name: Usefi, Hamid
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Lie solvable restricted enveloping algebras were characterized by Riley and Shalev except when the ground field is of characteristic 2. We resolve the characteristic 2 case here which completes the classification. As an application of our result, we obtain a characterization of ordinary Lie algebras over any field whose enveloping algebra is Lie solvable.
The HeH⁺ isotopologues in intense asymmetric laser fields
Creators: name: Oppermann, Florian
Publisher: name: Hannover : Institutionelles Repositorium der Gottfried Wilhem Leibniz Universität Hannover
Year: 2023
Subjects: subject: strong-field physics
subject: molecular physics
subject: laser-matter interaction
subject: numerical simulation
subject: quantum physics
subject: molecular dynamics
subject: time-dependent Schrödinger equation
subject: Starkfeldphysik
subject: Molekülphysik
subject: Laser-Materie-Wechselwirkung
subject: Numerische Simulation
subject: Quantenphysik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: In this thesis, the effects of intense laser pulses on molecular dynamics are studied at the example of the helium hydride molecular ion HeH⁺. It serves as a benchmark system for asymmetric molecules because it has features such as an asymmetric mass distribution, a permanent dipole moment and a rich structure of electronic levels while still being relatively simple and easy to model. In order to carry out numerical simulations in high accuracy, we first develop a reduced-dimensional model system for HeH⁺ that still reproduces crucial real-world data. This quantum-mechanical non-Born-Oppenheimer model is then used in time-dependent Schrödinger-equation calculations to study various effects: The ionization (electron removal) and subsequent dissociation of HeH⁺ are studied in laser fields of 800 nm and 400 nm. Enhanced ionization at a certain internuclear distance as well as excitation of vibrational motion—if possible—have significant effects on the molecular dynamics and the ionization probability. Breaking the molecule into He + H⁺ (ground-state dissociation) or He⁺ + H⁺ + 𝑒¯ (ionization) are two prototypical, very simple chemical reactions. By means of collinearly polarized two-color fields which have a spatial asymmetry, we show that it is possible to switch from one fragmentation channel to the other one just using the relative two-color delay as a control knob. Finally, molecular dynamics depends on the choice of isotopologue, i. e. the nuclear masses. The reduced mass of the nuclei has an obvious and very important effect on the time scale of vibrational motion and the available HeH⁺ isotopologues allow to study this. However, also the mass distribution within the molecule influences the dynamics, especially in molecular ions where the dipole moment depends on the nuclear center of mass. The quantum-mechanical non-Born-Oppenheimer calculations are supported by a multi-level Born-Oppenheimer model and by classical-trajectory calculations where appropriate. We compare some of our results to measurement data and suggest feasible experimental parameters for other of our findings where there are no measured results yet.
Pre-Explosive Observational Properties of Type Ia Supernovae
Creators: name: Tornambé, A.
name: Piersanti, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The evolutionary path of rotating CO WDs directly accreting CO-rich matter is followed up to few seconds before the explosive breakout in the framework of the Double Degenerate rotationally-driven accretion scenario. We find that the evolutionary properties depend only on the actual mass of the accreting WD and not on the previous history. We determine the expected frequency and amplitude of the gravitational wave emission, which occurs during the mass transfer process and acts as a self-tuning mechanism of the accretion process itself. The gravitational signal related to Galactic sources can be easily detected with the next generation of space-born interferometers and can provide notable constraints to the progenitor model. The expected statistical distribution of pre-explosive objects in the Galaxy is provided also in the effective temperature-apparent bolometric magnitude diagrams which can be used to identify merged DD systems via UV surveys. We emphasize that the thermonuclear explosion occurs owing to the decay of physical conditions keeping over-stable the structure above the classical Chandrasekhar limit and not by a steady increase of the WD mass up to this limit. This conclusion is independent of the evolutionary scenario for the progenitors, but it is a direct consequence of the stabilizing effect of rotation. Such an occurrence is epistemological change of the perspective in defining the ignition process in accreting WDs. Moreover, this requires a long evolutionary period (several million years) to attain the explosion after the above mentioned conditions cease to keep stable the WD. Therefore it is practically impossible to detect the trace of the exploding WD companion in recent pre-explosion frames of even very near SN Ia.
description: 12 pages, 8 figures, 3 tables. Published on MNRAS
title: Адаптивная мультимодельная аппроксимация в системах управления с интеллектуальными компонентами
Creators: name: ., В.И. Афанасьева – к.ф.-м.н.,  E-mail: tualpin@list.ru С.Н. Петрова – к.п.н., доцент, Технический университет УГМК (Свердловская обл., г. Верхняя Пышма) E-mail: axial_120@mail.ru Е.В. Лисовский – к.ф.-м.н., доцент, Калужский филиал МГТУ им. Н.Э. Баумана E-mail: levgenijv@gmail.com Е.В. Игонина – к.ф.-м.н., доцент, Елецкий государственный университет им. И.А. Бунина E-mail: elenaigonina7@mail.ru М.А. Людаговская – магистрант, кафедра Транспортное строительство», Российский университет транспорта (РУТ МИИТ) E-mail: m.ludagovskaya@gmail.com
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. В настоящее время актуальным направлением исследований является разработка методов и алгоритмов создания интеллектуальных систем управления сложными объектами с учетом условий, когда затруднено функционирование автоматизированных систем управления (АСУ). Метод, базирующийся на построении и анализе моделей Такаги–Суджено (ТС-моделей), является мультимодельным методом исследования, допускающим универсальную аппроксимацию нелинейных систем с помощью набора специальных линейных моделей с регуляторами.
Цель. Изучить конструктивные условия стабилизации до асимптотической устойчивости на основе мультимодельной аппроксимации и проанализировать возможности применения ТС-моделей для разработки информационно-управляющих систем (ИУС) с интеллектуальными компонентами.
Результаты. Охарактеризован подход к моделированию и стабилизации ИУС, в частности ИУС транспорта с интеллектуальными компонентами, на основе использования ТС-моделей. Рассмотрены задачи стабилизации управляемых систем с учетом возможностей обобщенных функций Ляпунова и методов решения линейных матричных неравенств. Приведен обзор некоторых результатов по устойчивости и стабилизации управляемых ТС-моделей. Описаны перспективы использования функций Ляпунова для исследования качественного поведения изучаемых типов моделей в задачах проектирования и совершенствования интеллектуальных систем управления.
Практическая значимость. Результаты работы могут найти применение в задачах проектирования сложных технических систем с интеллектуальными компонентами, а также в задачах совершенствования технологий управления электроэнергетическими системами. Применение условий стабилизации возможно в задачах управления системами железнодорожного транспорта, в задачах управления производственными процессами и в задачах оптимизации.
Stochastic Heisenberg limit: Optimal estimation of a fluctuating phase
Creators: name: Berry, Dominic W.
name: Hall, Michael J. W.
name: Wiseman, Howard M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ultimate limits to estimating a fluctuating phase imposed on an optical beam can be found using the recently derived continuous quantum Cramer-Rao bound. For Gaussian stationary statistics, and a phase spectrum scaling asymptotically as 1/omega^p with p>1, the minimum mean-square error in any (single-time) phase estimate scales as N^{-2(p-1)/(p+1)}, where N is the photon flux. This gives the usual Heisenberg limit for a constant phase (as the limit p--> infinity) and provides a stochastic Heisenberg limit for fluctuating phases. For p=2 (Brownian motion), this limit can be attained by phase tracking.
description: 5+4 pages, to appear in Physical Review Letters
Time-dependent spherically symmetric covariant Galileons
Creators: name: Babichev, Eugeny
name: Esposito-Farese, Gilles
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study spherically symmetric solutions of the cubic covariant Galileon model in curved spacetime in presence of a matter source, in the test scalar field approximation. We show that a cosmological time evolution of the Galileon field gives rise to an induced matter-scalar coupling, due to the Galileon-graviton kinetic braiding, therefore the solution for the Galileon field is non trivial even if the bare matter-scalar coupling constant is set to zero. The local solution crucially depends on the asymptotic boundary conditions, and in particular, Minkowski and de Sitter asymptotics correspond to different branches of the solution. We study the stability of these solutions, namely, the well-posedness of the Cauchy problem and the positivity of energy for scalar and tensor perturbations, by diagonalizing the kinetic terms of the spin-2 and spin-0 degrees of freedom. In addition, we find that in presence of a cosmological time evolution of the Galileon field, its kinetic mixing with the graviton leads to a friction force, resulting to efficient damping of scalar perturbations within matter.
description: 20 pages, no figure, RevTeX4 format; v2: minor changes reflecting the published version in PRD
title: Проектирование купажей растительных масел с повышенной биологической эффективностью
Creators: name: ., Е.Ю. Вольф – к.т.н., ст. преподаватель, кафедра «Технологии продуктов питания», Саратовский государственный аграрный университет им. Н.И. Вавилова E-mail: wolfsgau@gmail.ru И.В. Симакова – д.т.н., доцент, профессор, кафедра «Технологии продуктов питания», Саратовский государственный аграрный университет им. Н.И. Вавилова E-mail: simakovaiv@yandex.ru Е.В. Берднова – к.п.н., доцент, кафедра «Экономическая кибернетика», Саратовский государственный аграрный университет им. Н.И. Вавилова E-mail: berdnovaev@sgau.ru Е.Н. Корсунова – к.м.н., кафедра факультетской терапии, Саратовский государственный медицинский университет им. В.И. Разумовского E-mail: korsunovaen@mail.ru В.П. Корсунов – д.т.н., профессор, кафедра «Информационные технологии и прикладная математика», Саратовский государственный аграрный университет им. Н.И. Вавилова E-mail: korsunovvp@sgau.ru В.М. Козырева – студентка, кафедра «Технологии продуктов питания», Саратовский государственный аграрный университет им. Н.И. Вавилова E-mail: vika_koz_95@mail.ru Э.А. Карагулова – студентка, кафедра «Технологии продуктов питания», Саратовский государственный аграрный университет им. Н.И. Вавилова E-mail: karagulova317@gmail.com
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Производство купажей растительных масел, особенно нерафинированных, весьма актуально и практично с точки зрения полезного питания, так как в процессе купажирования создается пищевой продукт с оптимальным соотношением жирных кислот омега-3 и омега-6: 5…10:1. Для создания таких купажей необходимо использовать математические методики, которые позволят получить необходимые и точные расчетные данные.
Цель. Провести проектирование купажей нерафинированных растительных масел: сафлорового, горчичного, рыжикового и расторопшевого.
Результаты. В ходе исследования с помощью применения симплекс-метода и математических расчетов выявлены необходимые количественные соотношения исходных масел для создания купажей с оптимальным соотношением жирных кислот омега-3 и омега-6. При исследовании данной темы применялись математические и аналитические методы.
Практическая значимость. Вопрос разработки купажей, сбалансированных по эссенциальным жирным кислотам, является актуальным вследствие увеличения числа алиментарно-зависимых заболеваний во всем мире, связанных с неправильным питанием и нарушением липидного обмена. Подобранная методика симплексного планирования позволила создать купажи с заданными свойствами, отличающиеся высокими вкусовыми достоинствами и имеющие в данном аспекте преимущества перед инкапсулированными продуктами.
Learning and inference in a nonequilibrium Ising model with hidden nodes
Creators: name: Dunn, Benjamin
name: Roudi, Yasser
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We study inference and reconstruction of couplings in a partially observed kinetic Ising model. With hidden spins, calculating the likelihood of a sequence of observed spin configurations requires performing a trace over the configurations of the hidden ones. This, as we show, can be represented as a path integral. Using this representation, we demonstrate that systematic approximate inference and learning rules can be derived using dynamical mean-field theory. Although naive mean-field theory leads to an unstable learning rule, taking into account Gaussian corrections allows learning the couplings involving hidden nodes. It also improves learning of the couplings between the observed nodes compared to when hidden nodes are ignored.
Magnetic Fields of Neutron Stars : The AMXP Connection
Creators: name: Konar, Sushan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: This article briefly reviews our current understanding (or lack thereof) of the evolution of magnetic fields in neutron stars, with an emphasis on the binary systems. In particular, the significance of the newly emerging population of accreting millisecond pulsars (AMXP) is discussed.
description: v1 : 5 pages, 4 figure, uses basi.cls, submitted to ASI Conference Series on "Recent Trends in the Study of Compact Objects: Theory and Observation" | v2 : major modification of figures, minor changes in the text
HERMES: towards an integrated toolbox to characterize functional and effective brain connectivity
Creators: name: Niso, Guiomar
name: Bruña, Ricardo
name: Pereda, Ernesto
name: Gutiérrez, Ricardo
name: Bajo, Ricardo
name: Maestú, Fernando
name: del-Pozo, Francisco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Mathematical Software (cs.MS)
subject: Biological Physics (physics.bio-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The analysis of the interdependence between time series has become an important field of research in the last years, mainly as a result of advances in the characterization of dynamical systems from the signals they produce, the introduction of concepts such as generalized and phase synchronization and the application of information theory to time series analysis. In neurophysiology, different analytical tools stemming from these concepts have added to the 'traditional' set of linear methods, which includes the cross-correlation and the coherency function in the time and frequency domain, respectively, or more elaborated tools such as Granger Causality. This increase in the number of approaches to tackle the existence of functional (FC) or effective connectivity (EC) between two (or among many) neural networks, along with the mathematical complexity of the corresponding time series analysis tools, makes it desirable to arrange them into a unified-easy-to-use software package. The goal is to allow neuroscientists, neurophysiologists and researchers from related fields to easily access and make use of these analysis methods from a single integrated toolbox. Here we present HERMES (http://hermes.ctb.upm.es), a toolbox for the Matlab environment (The Mathworks, Inc), which is designed for the analysis functional and effective brain connectivity from neurophysiological data such as multivariate EEG and/or MEG records. It includes also visualization tools and statistical methods to address the problem of multiple comparisons. We believe that this toolbox will be very helpful to all the researchers working in the emerging field of brain connectivity analysis.
description: 58 pages, 10 figures, 3 tables, Neuroinformatics 2013
Deciphering the concept of ignorance in the Quran by the method of Charmaz's Grounded theory.pdf
Creators: name: Ghodrati Vayghan, Manizhe
Publisher: name: figshare
Year: 2022
Subjects: History of religion
International history
Historical studies not elsewhere classified

description: The word ignorance has been used in 17 surahs and 24 times in nominal and verbal derivatives in holy Quran. It can be realized from the prelimمنinary studies that human societies are not immune from ignorance and any society in which a form of ignorance is observed, it’s considered an ignorant society, regardless of time and place. This study intends to identify the concept of the word "Ignorance" and the reasons for its use in the Quran through frequent lookup in verses using "Charmaz Gounded Theory".In this method by using related data groups, concepts and various levels of analysis and also from interaction between researchers with their data and their questions about the data, a grounded theory is produced that reflects the process of data collecting and shaping. In this method, discovering a reality is not expected but at last a version of reality is obtained which is an approach to a systematic review of data with the goal of producing hypotheses. In order to achieve this goal, surahs and verses containing the word "ignorance" and its derivatives were identified and coded. Then through focus on coded verses and frequent survey of the word "ignorance" in containing verses, the basic concepts extracted and categorized. It seems that the applied discourse of the word "ignorance" in Quran is an educational discourse that intends to promote and improve the culture of society in which in two individual and social aspects, ignorant manner and insight attribute are mentioned and focused then non ignorant attribute in these two fields are highlighted and emphasized
Mind the Resonances: Final stages of accretion into bumpy black holes
Creators: name: Lukes-Gerakopoulos, Georgios
name: Contopoulos, George
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In this article we discuss a possible way of testing the Kerr black hole hypothesis by taking advantage of phenomena correlated with chaotic motion in the final stages of an accretion disk around a bumpy black hole. We anticipate that these phenomena should have an imprint in the electromagnetic spectrum coming from the accretion disk.
description: 10 pages, 7 figures, To appear in the proceedings of the conference, NEB 15 - Recent Developments in Gravity - 20-23 June 2012, Chania, Greece
A Note on Computing Extreme Tail Probabilities of the Noncentral T Distribution with Large Noncentrality Parameter
Creators: name: Witkovsky, Viktor
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences
subject: 62E15, 62-04

description: The noncentral $t$-distribution is a generalization of the Student's $t$-distribution. In this paper we suggest an alternative approach for computing the cumulative distribution function (CDF) of the noncentral $t$-distribution which is based on a direct numerical integration of a well behaved function. With a double-precision arithmetic, the algorithm provides highly precise and fast evaluation of the extreme tail probabilities of the noncentral $t$-distribution, even for large values of the noncentrality parameter $δ$ and the degrees of freedom $ν$. The implementation of the algorithm is available at the MATLAB Central, File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/41790-nctcdfvw.
description: Preprint submitted to Acta Universitatis Palackianae Olomucensis, Facultas rerum naturalium, Mathematica, submitted June 21, 2013, revised September 4, 2013
Reduced absorption of light by metallic intra-cavity contacts: Tamm plasmon based laser mode engineering
Creators: name: Kaliteevski, M. A.
name: Lazarenko, A. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It was widely accepted that embedding of metallic layers into optoelectronic structures is detrimental to lasing due absorption in metal. However, recently macroscopic optical coherence and lasing was observed in microcavities with intra-cavity single metallic layer. Here we propose the design of the of microcavity-type structure with two intra-cavity metallic layers which could serve as contacts for electrical pumping. The design of optical modes based on utilizing peculiarities of Tamm plasmon provides vanishing absorption due to fixing of the node of electric field of optical mode to metallic layers. Proposed design can be used for fabrication of vertical cavity lasers with intra-cavity metallic contacts.
description: 3 figures, submitted to APL
Habitability and Multistability in Earth-like Planets
Creators: name: Lucarini, Valerio
name: Pascale, Salvatore
name: Boschi, Robert
name: Kirk, Edilbert
name: Iro, Nicolas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We explore the potential multistability of the climate for a planet around the habitable zone. We focus on conditions reminiscent to those of the Earth system, but our investigation aims at presenting a general methodology for dealing with exoplanets. We provide a thorough analysis of the non-equilibrium thermodynamical properties of the climate system and explore, using a a flexible climate model, how such properties depend on the energy input of the parent star, on the infrared atmospheric opacity, and on the rotation rate. It is possible to reproduce the multi-stability properties reminiscent of the paleoclimatologically relevant snowball (SB) - warm (W) conditions. We then study the thermodynamics of the W and SB states, clarifying the role of the hydrological cycle in shaping the irreversibility and the efficiency of the W states, and emphasizing the extreme diversity of the SB states, where dry conditions are realized. Thermodynamics provides the clue for studying the tipping points of the system and leads us to constructing parametrizations where the main thermodynamic properties are expressed as functions of the emission temperature of the planet only. Such functions are rather robust with respect to changing the rotation rate of the planet from the current terrestrial one to half of it. We then explore the dynamical range of slowy rotating and phase locked planets. There is a critical rotation rate below which the multi-stability properties are lost. Such critical rotation rate corresponds roughly to the phase lock 2:1 condition. Therefore, if an Earth-like planet is 1:1 phase locked with respect to the parent star, only one climatic state would be compatible with a given set of astronomical and astrophysical parameters. These results have relevance for the general theory of planetary circulation and for the definition of necessary and sufficient conditions for habitability.
description: 12 pages, 9 figures. arXiv admin note: text overlap with arXiv:1207.1254
Information directionality in coupled time series using transcripts
Creators: name: Monetti, Roberto
name: Bunk, Wolfram
name: Aschenbrenner, Thomas
name: Springer, Stephan
name: Amigo, Jose Maria
Publisher: name: arXiv
Year: 2013
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: In ordinal symbolic dynamics, transcripts describe the algebraic relationship between ordinal patterns. Using the concept of transcript, we exploit the mathematical structure of the group of permutations to derive properties and relations among information measures of the symbolic representations of time series. These theoretical results are then applied for the assessment of coupling directionality in dynamical systems, where suitable coupling directionality measures are introduced depending only on transcripts. These novel measures estimate information flow in lower space dimension and reduce to well-established coupling directionality quantifiers when some general conditions are satisfied. Furthermore, by generalizing the definition of transcript to ordinal patterns of different lengths, several of the commonly used information directionality measures can be encompassed within the same framework.
description: 24 pages, 9 figures
The effect of music therapy on language recovery in patients with aphasia after stroke: a systematic review and meta-analysis
Creators: name: Liu, Qingqing
name: Li, Weibo
name: Yin, Yu
name: Zhao, Zhenbiao
name: Yang, Yuhui
name: Zhao, Yue
name: Tan, Yafei
name: Yu, Jing
Publisher: name: figshare
Year: 2021
Subjects: subject: Survey Results
subject: 110321 Rehabilitation and Therapy (excl. Physiotherapy)
subject: FOS: Clinical medicine

description: This meta-analysis is to explore whether music therapy can improve the language function of patients with aphasia after stroke
Conceptualising secondary expressive arts teachers’ perceptions of effective use of technology in their teaching
Creators: name: Chapman, Sammy
Publisher: name: Cardiff Metropolitan University
Year: 2023
Subjects: Educational technology and computing

description: Education within Wales finds itself at a metaphorical crossroads, whereby Curriculum for Wales (Welsh Government, 2015) and the COVID-19 pandemic require teachers to adapt and update teaching practices. Through the work of ‘transnational policy actors’ (Hulme, Beauchamp and Clarke, 2020, p. 498) and subsequent redesign of the curriculum into Areas of Learning and Experience (Power, Newton and Taylor, 2020), these newly designed areas of learning are expected to have ‘an identifiable disciplinary and instrumental core’ (Donaldson, 2016, p. 12). In addition, the cross-curricular responsibility of digital competence (Crick, 2021) provides another dimension to the current context of the research. The study employed semi-structured one-to-one online synchronous interviews with Secondary Expressive Arts teachers from across Wales. The aim of the research was to conceptualise Secondary Expressive Arts teachers’ perceptions of effective use of technology within their teaching. The data collection was conducted as an inter-view, an exchanging and interchanging of views (Kvale, 1996), to encourage participants to share their perceptions freely and openly on the topic at hand. As a result of reflexive thematic analytical processes, eight key themes were developed: purpose, creative processes, affordances, perceived effective use, action, outcome, reflection on action and barriers. These key themes culminate within the developed ‘Perceived Effective Use Process’ conceptual model. The main contribution of the project is the developed conceptual model demonstrating the ‘Perceived Effective Use Process’. The model builds on existing theory (Wilson, Shulman and Richert, 1987) and offers opportunities to conceptualise the perceptions of teachers from other Areas of Learning and Experience on the topic of technology and its’ perceived effective use within teaching. In addition, the labelling of the ‘Creative Processes’ provides an identifiable core specific to the Expressive Arts Area of Learning and Experience.
title: Разработка нейронной сети на основе знаний о воздействиях окружающей среды
Creators: name: ., К. Р. Ахметзянов – аспирант, кафедра автоматики и телемеханики, Пермский национальный исследовательский политехнический университет E-mail: kirill94a@mail.ru А. А. Южаков – д.т.н., профессор, зав. кафедрой автоматики и телемеханики, Пермский национальный исследовательский политехнический университет E-mail: uz@at.pstu.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. В настоящее время в России большое внимание уделяется проблемам экологии, в частности, раздельному сбору мусора. Для этих целей разрабатываются специальные устройства для сбора отходов, в которых сортировка осуществляется на этапе сбора мусора. Для решения задачи сортировки необходимо разработать нейронную сеть для классификации изображений.
Цель. Предложить идею об извлечении и переносе информации о предметах, что позволит обучать нейронные сети на небольшом количестве данных.
Результаты. Предложен подход к построению оригинальной нейронной сети, а также вариант реализации такой сети. Отмечено, что подход заключается в извлечении воздействий, которые оказывает окружающая среда на любой предмет, после чего предлагаемая нейронная сеть получает предмет без каких-либо воздействий. Указаны условия проведения экспериментов с разработанной архитектурой нейронной сети, а также представлены результаты этих экспериментов.
Практическая значимость. Для обучения предлагаемой нейронной сети, которая устраняет воздействия окружающей среды и сравнивает предметы без воздействий, необходимо всего несколько эталонов обучающей выборки на каждый распознаваемый класс, что устранит недостаток сверточных нейронных сетей – необходимость большой обучающей выборки для точного распознавания.
The Slow Flow Model of Dust Efflux in Local Star-Forming Galaxies
Creators: name: Zahid, H. Jabran
name: Torrey, Paul
name: Kudritzki, Rolf
name: Kewley, Lisa
name: Dave, Romeel
name: Geller, Margaret
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We develop a dust efflux model of radiation pressure acting on dust grains which successfully reproduces the relation between stellar mass, dust opacity and star formation rate observed in local star-forming galaxies. The dust content of local star-forming galaxies is set by the competition between the physical processes of dust production and dust loss in our model. The dust loss rate is proportional to the dust opacity and star formation rate. Observations of the relation between stellar mass and star formation rate at several epochs imply that the majority of local star-forming galaxies are best characterized as having continuous star formation histories. Dust loss is a consequence of sustained interaction of dust with the radiation field generated by continuous star formation. Dust efflux driven by radiation pressure rather than dust destruction offers a more consistent physical interpretation of the dust loss mechanism. By comparing our model results with the observed relation between stellar mass, dust extinction and star formation rate in local star-forming galaxies we are able to constrain the timescale and magnitude of dust loss. The timescale of dust loss is long and therefore dust is effluxed in a "Slow Flow". Dust loss is modest in low mass galaxies but massive galaxies may lose up to 70~80% of their dust over their lifetime. Our Slow Flow model shows that mass loss driven by dust opacity and star formation may be an important physical process for understanding normal star-forming galaxy evolution.
description: 17 pages, 11 figures. Accepted for publication in MNRAS
title: Το ψηφιακό μάρκετινγκ ως ανταγωνιστικό πλεονέκτημα στις μικρομεσαίες επιχειρήσεις
title: Digital marketing as a competitive advantage for small and medium enterprises
titleType: AlternativeTitle
Creators: name: Κατσαρός, Νικόλαος
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2023
Subjects: subject: Ψηφιακό marketing
subject: Μικρομεσαίες επιχειρήσεις
subject: Ψηφιακό marketing
subject: Μικρομεσαίες επιχειρήσεις
subject: Ανταγωνιστικό πλεονέκτημα
subject: Digital marketing
subject: Small and medium enterprises
subject: Competitive advantage

description: Μ.Δ.Ε. 52
description: Στη σύγχρονη επιχειρηματική πραγματικότητα το ψηφιακό μάρκετινγκ αναδεικνύεται ως το σημαντικότερο μέσο προώθησης των προϊόντων και υπηρεσιών των επιχειρήσεων. Σκοπός της παρούσας Μελέτης είναι η διερεύνηση του ερωτήματος κατά πόσο, και πως τα διαθέσιμα κανάλια του ψηφιακού μάρκετινγκ μπορούν να δημιουργήσουν ανταγωνιστικό πλεονέκτημα για τις μικρομεσαίες επιχειρήσεις, οι οποίες στις χώρες του ΟΟΣΑ αντιπροσωπεύουν το 99% του συνόλου των επιχειρήσεων που δημιουργούν κατά μέσο όρο το 70% των θέσεων εργασίας και το 55% της προστιθέμενη αξίας στην οικονομία. Ως ανταγωνιστικό πλεονέκτημα μιας επιχείρησης έναντι των ανταγωνιστών της μπορεί να θεωρηθεί η πρόσβαση της σε φυσικούς πόρους, σε εξειδικευμένο εργατικό δυναμικό, η κατοχή μιας αποκλειστικής τεχνολογίας, μιας ισχυρής επωνυμίας ή η βασική της ικανότητα σε οποιονδήποτε τομέα που μπορεί να της χαρίσει ένα βιώσιμο ανταγωνιστικό πλεονέκτημα. Οι στρατηγικές επίτευξης του ανταγωνιστικού πλεονεκτήματος που ακολουθούν οι επιχειρήσεις είναι η ηγεσία κόστους, ή διαφοροποίηση ή η εστίαση στο κόστος ή την διαφοροποίηση. Μέσα από την βιβλιογραφική έρευνα γίνεται μία καταγραφή και ανάλυση των πιο διαδεδομένων καναλιών του ψηφιακού μάρκετινγκ, των πλεονεκτημάτων και των μειονεκτημάτων που αυτά προσφέρουν, σύγκριση των στρατηγικών τους με τις μεγάλες επιχειρήσεις, καθώς και του ρόλου τους στην επίτευξη ανταγωνιστικού πλεονεκτήματος για τις μικρομεσαίες επιχειρήσεις. Τα αποτελέσματα καταδεικνύουν τη δυνατότητα απόκτησης ανταγωνιστικού πλεονεκτήματος από τις ΜΜΕ εφόσον κατανοήσουν τους περιορισμούς και τα δυνατά τους σημεία, προσαρμόζοντας αντίστοιχα τις στρατηγικές του ψηφιακού μάρκετινγκ ως προς το κοινό στόχο τους, αξιοποιώντας τα δωρεάν και αποδοτικά κανάλια που αυτό προσφέρει και εστιάζοντας σε εξειδικευμένα κοινά.