cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
СЛОВА АЛТАРЬ, ИКОНОСТАС, ПАПЕРТЬ, ПРИТВОР: ИЗ ОПЫТА ЛЕКСИКОГРАФИЧЕСКОГО АНАЛИЗА
Creators: name: БОГДАНЧИКОВА Т.Ю.
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2020
Subjects: СЛОВО (ЛЕКСЕМА)
ЦЕРКОВНАЯ ЛЕКСИКА
ЛЕКСИКОГРАФИЧЕСКИЙ АСПЕКТ
СЛОВАРНАЯ СТАТЬЯ
ТОЛКОВАНИЕ
WORD (LEXEME)
CHURCH VOCABULARY
LEXICOGRAPHIC ASPECT
DICTIONARY ARTICLE
MEANING OF THE WORD

description: В статье анализируется семантическая структура единиц тематической группы «Церковные помещения, их части», делаются выводы о количественных и качественных изменениях. Материалом исследования являются словарные статьи толковых лексикографических изданий русского языка разной хронологии, в результате анализа которых рассмотрен объем и содержание указанных лексем; также выявлены различия в зоне цитат-иллюстраций в использованных источниках.
Higher-order asymptotic corrections and their application to the Gamma Variance Model
Creators: name: Canonero, Enzo
name: Brazzale, Alessandra Rosalba
name: Cowan, Glen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: 62P35

description: We present improved methods for calculating confidence intervals and $p$-values in situations where standard asymptotic approaches fail due to small sample sizes. We apply these techniques to a specific class of statistical model that can incorporate uncertainties in parameters that themselves represent uncertainties (informally, "errors on errors") called the Gamma Variance Model. This model contains fixed parameters, generically called $\varepsilon$, that represent the relative uncertainties in estimates of standard deviations of Gaussian distributed measurements. If the $\varepsilon$ parameters are small, one can construct confidence intervals and $p$-values using standard asymptotic methods. This is formally similar to the familiar situation of a large data sample, in which estimators for all adjustable parameters have Gaussian distributions. Here we address the important case where the $\varepsilon$ parameters are not small and as a consequence the asymptotic distributions do not represent a good approximation. We investigate improved test statistics based on the technology of higher-order asymptotics ($p^*$ approximation and Bartlett correction).
description: 19 pages, 8 figures
Molecular orbitals and strong-field approximation
Creators: name: Kjeldsen, Thomas Kim
name: Madsen, Lars Bojer
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: V.I. Usachenko and S.-I. Chu [Phys. Rev. A {\bf 71}, 063410 (2005)] discuss the molecular strong-field approximation in the velocity gauge formulation and indicate that some of our earlier velocity gauge calculations are inaccurate. Here we comment on the results of Usachenko and Chu. First, we show that the molecular orbitals used by Usachenko and Chu do not have the correct symmetry, and second, that it is an oversimplification to describe the molecular orbitals in terms of just a single linear combination of two atomic orbitals. Finally, some values for the generalized Bessel function are given for comparison.
description: 4 pages, 3 figures
Investigating heinrich events : a continuum model of iceberg drift and sedimentation
Creators: name: La Prairie, Douglas I.
Publisher: name: University of British Columbia
Year: 2009

description: Records from the North Atlantic reveal high deposition rates of ice-rafted sediments from the Laurentide ice sheet during at least six distinct periods. Known as Heinrich events, these episodes of rapid deposition are attributed to massive iceberg calving promoted by unstable behavior of the ice sheet. The exact mechanisms causing these occurrences of high iceberg flux are not well understood. As a means of elucidating and exploring the freshwater and sediment fluxes associated with Heinrich events, a computer model has been developed which attempts to simulate iceberg drift during these periods of massive calving. This enables reconstruction of the marine sedimentation pattern and provenance-labeled marine core stratigraphy. Using finite-difference methods over a discretized problem domain, the model treats the armada of icebergs as a continuum rather than tracking an ensemble of perhaps thousands of individual trajectories. In this manner the drift of the model icebergs in a multi-layer ocean is governed by advective, diffusive and Coriolis forces as well as being subject to melting. The stochastic nature of iceberg drift is dealt with using a tensorial diffusion coefficient to approximate the effects of heterogeneity, such as different shapes, which strongly influence iceberg drift.
ГРАФОГИБРИДНЫЕ КОММЕРЧЕСКИЕ НАИМЕНОВАНИЯ АРХАНГЕЛЬСКОЙ ОБЛАСТИ
Creators: name: МАРТЫНОВА И.В.
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2020
Subjects: КОММЕРЧЕСКИЕ НАИМЕНОВАНИЯ
ГРАФИКА
ГРАФОГИБРИДНОЕ НАИМЕНОВАНИЕ
ЛАТИНИЗИРОВАННЫЙ ЭЛЕМЕНТ
КИРИЛЛИЧЕСКИЙ ЭЛЕМЕНТ
COMMERCIAL NAMES
GRAPHICS
GRAPHIC HYBRID NAME
ROMANIZED ELEMENT
CYRILLIC ELEMENT

description: В статье рассматриваются структурные, семантические и функциональные особенности коммерческих наименований, представляющих собой смешение латинской и кириллической графики. Объектом анализа выступают коммерческие наименованияАрхангельской области. Источником материала послужили данные электронного приложения «2ГИС». Смешение латинских и кириллических элементов, наблюдающееся в процессе маркетинговой коммуникации как один из вариантов языковой игры, помогает подчеркнуть специфику предприятия или фирмы, экономит языковые средства и привлекает потребителя товаров или услуги.
Electric conductivity in non-Hermitian holography
Creators: name: Xian, Zhuo-Yu
name: Fernández, David Rodríguez
name: Chen, Zhaohui
name: Liu, Yang
name: Meyer, Rene
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the phase structure and charge transport at finite temperature and chemical potential in the non-Hermitian PT-symmetric holographic model of arXiv:1912.06647. The non-Hermitian PT-symmetric deformation is realized by promoting the parameter of a global U(1) symmetry to a complex number. Depending on the strength of the deformation, we find three phases: stable PT-symmetric phase, unstable PT-symmetric phase, and an unstable PT-symmetry broken phase. In the three phases, the square of the condensate and also the spectral weight of the AC conductivity at zero frequency are, respectively, positive, negative, and complex. We check that the Ferrell-Glover-Tinkham sum rule for the AC conductivity holds in all the three phases. We also investigate a complexified U(1) rotor model with PT-symmetric deformation, derive its phase structure and condensation pattern, and find a zero frequency spectral weight analogous to the holographic model.
description: 23+13 pages, 14 figures, references added, typos fixed
ЭКОНОМИКА УПОМИНАНИЙ В ИНФОРМАЦИОННОМ ОБЩЕСТВЕ
Creators: name: ГОНЧАРОВ Д.К.
name: АЙДАРОВА Е.М.
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2020
Subjects: УПРАВЛЕНИЕ РЕПУТАЦИЕЙ
ПРОФЕССИОНАЛЬНЫЙ ПОИСК
ЭКОНОМИКА ЗНАНИЙ
REPUTATION MANAGEMENT
PROFESSIONAL SEARCH
KNOWLEDGE ECONOMY

description: В современном информационном обществе возможности по комментированию всех сторон общественной и экономической жизни заставляют использовать интересантов ручной или автоматизированный поиск упоминаний имен и брендов с целью осведомленности или управления репутацией. Для этого используется либо поиск с использованием языка запросов или специальные сервисы, позволяющие проводить кроме непосредственно поиска и аналитику упоминаний и отзывов.
СОВРЕМЕННЫЕ ПОДХОДЫ К ОЦЕНКЕ ИНВЕСТИЦИОННОЙ ПРИВЛЕКАТЕЛЬНОСТИ ПРЕДПРИЯТИЯ
Creators: name: ГРЕБЕННИКОВА В.А.
name: ВАРЕНИКОВ В.А.
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2020
Subjects: ИНВЕСТИЦИИ
ИНВЕСТИЦИОННАЯ ПРИВЛЕКАТЕЛЬНОСТЬ
МЕТОДЫ ОЦЕНКИ ИНВЕСТИЦИОННОЙ ПРИВЛЕКАТЕЛЬНОСТИ
INVESTMENTS
INVESTMENT ATTRACTIVENESS
METHODS OF ASSESSING INVESTMENT ATTRACTIVENESS

description: Важнейшим аспектом принятия любого инвестиционного решения является оценка инвестиционной привлекательности объекта инвестирования. Инвестиционные решения относятся к числу наиболее сложных по процедуре выбора задач. Они основаны на многовариантной, многокритериальной оценке целого ряда факторов и тенденций, действующих, зачастую разнонаправлено. В качестве интегральной характеристики возможностей инвестирования, формирующейся на основании оценки степени целесообразности осуществления инвестиций в тот или иной хозяйствующий субъект в течение некоторого промежутка времени, выступает инвестиционная привлекательность предприятия. В ходе исследования была определена сущность инвестиционной привлекательности предприятия, проведен критический анализ методов ее оценки. В результате исследования выявлены преимущества и недостатки каждого метода, даны практические рекомендации по выбору той или иной методики в процессе принятия инвестиционных решений, составлены предложения по оптимизации существующей методической базы с учетом влияния факторов внешней среды и разработан универсальный метод оценки инвестиционной привлекательности предприятия.
Statistical study of a large and cleaned sample of ultraluminous and hyperluminous X-ray sources
Creators: name: Tranin, Hugo
name: Webb, Natalie
name: Godet, Olivier
name: Quintin, Erwan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Ultra-/hyper-luminous X-ray sources (ULX/HLX) could be interesting laboratories to improve our understanding of the supermassive black hole growth through super-Eddington accretion episodes and successive mergers of lighter holes. ULXs are thought to be powered by super-Eddington accretion on stellar-mass compact objects, while HLXs may be explained by accretion on intermediate-mass black holes (IMBHs). However, a significant portion of ULX/HLX derived from catalog searches are background AGN. Here we build samples of ULX/HLX from recent XMM-Newton, Swift-XRT and Chandra catalogs and the GLADE catalog of galaxies. We aim to characterize the frequency, environment and X-ray properties of ULXs and HLXs to better assess their differences and understand their populations. After a thorough classification of these X-ray sources, we remove 42% of S/N>3 sources, shown to be contaminants, to obtain the cleanest sample of ULX/HLX to date. From a sample of 1342 ULXs and 191 HLXs, we study their frequency, hardness, variability, radial distribution, and preferred environment. We build their Malmquist-corrected X-ray luminosity functions (XLF) and compare them with previous studies. The large sample size allows us to statistically compare ULXs and HLXs and assess differences in their nature. The interpretation of HLXs as IMBHs is investigated. A significant break is seen in the XLF at ~$10^{40}$erg/s. Our ULX sample, containing ~2% of contaminants, confirms that ULXs are located preferentially in spiral or star-forming galaxies. Some HLXs are significantly softer that ULXs and XRBs. Unlike ULXs, HLXs seem to reside equally in spiral as well as lenticular and elliptical galaxies and 35% of them have an optical counterpart. We estimate their mass and find 120 of them in the range of $2000-10^5 M_\odot$. Most HLXs seem consistent with an accreting massive black hole in a dwarf galaxy satellite.
description: 26 pages, 24 figures, accepted in A&A. Abstract abridged for arXiv submission
ПЕРСПЕКТИВЫ РАЗВИТИЯ МАРКЕТИНГА УСЛУГ
Creators: name: ДРОВОВОЗОВА О.В.
name: УЖЕГОВА А.М.
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2020
Subjects: МАРКЕТИНГ УСЛУГ
РЫНОК УСЛУГ
ИЗМЕНЯЮЩИЕСЯ ПОТРЕБНОСТИ
ТРАНСФОРМАЦИЯ СПРОСА
«НОВЫЙ» ПОТРЕБИТЕЛЬ
ВЫЗОВЫ МАРКЕТОЛОГАМ
SERVICE MARKETING
SERVICE MARKET
CHANGING NEEDS
DEMAND TRANSFORMATION
“NEW” CONSUMER
MARKETING CHALLENGES

description: В данной статье рассматривается влияние пандемии на изменение потребностей людей, трансформацию спроса и сферу услуг. Проводится аналитика особенностей изменения потребительского поведения, роли и значения маркетинга, профессиональных компетенций маркетологов в современных условиях. Предлагаются прогнозно-сценарные варианты развития маркетинга услуг в посткарантинный период. В качестве рекомендаций стратегического развития компаний, обращается внимание на невозможность снижения затрат на маркетинг. Определяются вызовы нового времени, предъявляемые маркетологам, что позволяет сделать вывод о востребованности профессии маркетолога в будущем.
ФОРМАТ «DARK STORE»: СОВРЕМЕННАЯ РЕАЛЬНОСТЬ РИТЕЙЛА РОССИИ
Creators: name: ЕГОРОВА К.Д.
name: ПЛАТОНОВА А.С.
name: СУВОРОВА С.Д.
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2020
Subjects: ПАНДЕМИЯ
«DARK STORE»
РЫНОК FMCG
РИТЕЙЛ
ОНЛАЙН-ТОРГОВЛЯ
ДОСТАВКА ТОВАРОВ
PANDEMIC
DARK STORE
FMCG
RETAIL
ONLINE TRADE
DELIVERY OF GOODS

description: Целью настоящего исследования является раскрытие сущности формата торговли «Dark Store» и оценка необходимости его практического распространения в России в ближайшей перспективе. В статье, на примере предприятий рынка FMCG, описаны основные уровни организации данного формата, рассмотрена технология продажи товаров, определены ключевые преимущества.
Multi-channel Speech Separation Using Spatially Selective Deep Non-linear Filters
Creators: name: Tesch, Kristina
name: Gerkmann, Timo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In a multi-channel separation task with multiple speakers, we aim to recover all individual speech signals from the mixture. In contrast to single-channel approaches, which rely on the different spectro-temporal characteristics of the speech signals, multi-channel approaches should additionally utilize the different spatial locations of the sources for a more powerful separation especially when the number of sources increases. To enhance the spatial processing in a multi-channel source separation scenario, in this work, we propose a deep neural network (DNN) based spatially selective filter (SSF) that can be spatially steered to extract the speaker of interest by initializing a recurrent neural network layer with the target direction. We compare the proposed SSF with a common end-to-end direct separation (DS) approach trained using utterance-wise permutation invariant training (PIT), which only implicitly learns to perform spatial filtering. We show that the SSF has a clear advantage over a DS approach with the same underlying network architecture when there are more than two speakers in the mixture, which can be attributed to a better use of the spatial information. Furthermore, we find that the SSF generalizes much better to additional noise sources that were not seen during training and to scenarios with speakers positioned at a similar angle.
description: Accepted version
Pulsar Candidate Identification Using Semi-Supervised Generative Adversarial Networks
Creators: name: Balakrishnan, Vishnu
name: Champion, David
name: Barr, Ewan
name: Kramer, Michael
name: Sengar, Rahul
name: Bailes, Matthew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Machine learning methods are increasingly helping astronomers identify new radio pulsars. However, they require a large amount of labelled data, which is time consuming to produce and biased. Here we describe a Semi-Supervised Generative Adversarial Network (SGAN) which achieves better classification performance than the standard supervised algorithms using majority unlabelled datasets. We achieved an accuracy and mean F-Score of 94.9% trained on only 100 labelled candidates and 5000 unlabelled candidates compared to our standard supervised baseline which scored at 81.1% and 82.7% respectively. Our final model trained on a much larger labelled dataset achieved an accuracy and mean F-score value of 99.2% and a recall rate of 99.7%. This technique allows for high quality classification during the early stages of pulsar surveys on new instruments when limited labelled data is available. We open-source our work along with a new pulsar-candidate dataset produced from the High Time Resolution Universe - South Low Latitude Survey. This dataset has the largest number of pulsar detections of any public dataset and we hope it will be a valuable tool for benchmarking future machine learning models.
description: added coauthors and one extra plot, main results unchanged, accepted by MNRAS journal
X-rays from Cepheus A East and West
Creators: name: Pravdo, Steven H.
name: Tsuboi, Yohko
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of X-rays from both components of Cepheus A, East and West, with the XMM-Newton Observatory. HH 168 joins the ranks of other energetic Herbig Haro objects that are sources of T~10^6 K X-ray emission. The HH 168 effective temperature is T = 5.8 (+3.5,-2.3) x 10^6 K and its unabsorbed luminosity is 1.1 x 10^29 erg s^-1, making it hotter and less luminous than other representatives of its class. We also detect prominent X-ray emission from the complex of compact radio sources believed to be the power sources for Cep A. We call this source HWX and it is distinguished by its hard X-ray spectrum, T = 1.2 (+1.2,-0.5) x 10^8 K, and complex spatial distribution. It may arise from one or more protostars associated with the radio complex, the outflows, or a combination of the two. We detect 102 X-rays sources; many presumed to be pre-main sequence stars based upon the reddening of their optical/IR counterparts.
description: 15 pages, 8 figures, data table not included because of size limits
Generation of tunable Terahertz out-of-plane radiation using Josephson vortices in modulated layered superconductors
Creators: name: Savel'ev, Sergey
name: Yampol'skii, Valery
name: Rakhmanov, Alexander
name: Nori, Franco
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show that a moving Josephson vortex in spatially modulated layered superconductors generates out-of-plane THz radiation. Remarkably, the magnetic and in-plane electric fields radiated are of the same order, which is very unusual for any good-conducting medium. Therefore, the out-of-plane radiation can be emitted to the vacuum without the standard impedance mismatch problem. Thus, the proposed design can be more efficient for tunable THz emitters than previous proposals, for radiation only propagating along the ab-plane.
description: 7 pages, 1 figure. Phys. Rev. B (2005), in press
Generalised Swan modules and the D(2) problem
Creators: name: Edwards, Tim
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 16D70, 55P15, 57M20, 55Q05

description: We give a detailed proof that, for any natural number n, each algebraic two complex over C_n \times C_\infty is realised up to congruence by a geometric complex arising from a presentation for the group.
description: This is the version published by Algebraic & Geometric Topology on 24 February 2006
Quantum-optimal information encoding using noisy passive linear optics
Creators: name: Tanggara, Andrew
name: Nair, Ranjith
name: Assad, Syed
name: Narasimhachar, Varun
name: Tserkis, Spyros
name: Thompson, Jayne
name: Lam, Ping Koy
name: Gu, Mile
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The amount of information that a noisy channel can transmit has been one of the primary subjects of interest in information theory. In this work we consider a practically-motivated family of optical quantum channels that can be implemented without an external energy source. We optimize the Holevo information over procedures that encode information in attenuations and phase-shifts applied by these channels on a resource state of finite energy. It is shown that for any given input state and environment temperature, the maximum Holevo information can be achieved by an encoding procedure that uniformly distributes the channel's phase-shift parameter. Moreover for large families of input states, any maximizing encoding scheme has a finite number of channel attenuation values, simplifying the codewords to a finite number of rings around the origin in the output phase space. The above results and numerical evidence suggests that this property holds for all resource states. Our results are directly applicable to the quantum reading of an optical memory in the presence of environmental thermal noise.
description: 32 pages, 11 figures; Accepted for publication in Quantum
CO emission from discs around isolated HAeBe and Vega-excess stars
Creators: name: Dent, W. R. F.
name: Greaves, J. S.
name: Coulson, I. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe results from a survey for J=3-2 12CO emission from visible stars with an infrared excess. The line is clearly detected in 21 objects, with molecular gas (>10^-3 Jupiter masses) common in targets with infrared excesses >0.01 (>56% of objects). Such high excesses indicate the presence of a disc of opening angle >12 degrees; within this, the optically thick disc prevents CO photodissociation. Two or three stars with associated CO have an excess <0.01, implying a disc opening angle <1 degree. Most line profiles are double-peaked or relatively broad. Model fits, assuming a Keplerian disc, indicate outer radii, R_out, of ~20-300 au. As many as 5 discs have outer radii smaller than the Solar System (50 au), and a further 4 have gas at radii <20 au. R_out is independent of the stellar spectral type (from K through to B9), but is correlated with total dust mass. R_out appears to decrease with time: discs around stars of age 3-7 Myr have a mean radius of ~210 au, whereas discs of age 7-20 Myr are a factor of 3 smaller. The only bona fide debris disc with detected CO is HD9672; this has a double peaked line profile and is the most compact gas disc observed, with a modelled radius 17 au). A fit to HD141569 suggests the gas lies in two rings of radii 90 and 250 au, similar to the scattered light structure. In both AB Aur and HD163296 the sizes of the molecular and dust scattering discs are also similar, suggesting that the gas and small dust grains are co-located.
description: 16 pages, 5 figures MNRAS - accepted
Cryogenic Multiplexing with Bottom-Up Nanowires
Creators: name: Olšteins, Dāgs
name: Nagda, Gunjan
name: Carrad, Damon J.
name: Beznasiuk, Daria V.
name: Petersen, Christian E. N.
name: Martí-Sánchez, Sara
name: Arbiol, Jordi
name: Jespersen, Thomas Sand
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Bottom-up grown nanomaterials play an integral role in the development of quantum technologies. Among these, semiconductor nanowires (NWs) are widely used in proof-of-principle experiments, however, difficulties in parallel processing of conventionally-grown NWs makes scalability unfeasible. Here, we harness selective area growth (SAG) to remove this road-block. We demonstrate large scale integrated SAG NW circuits consisting of 512 channel multiplexer/demultiplexer pairs, incorporating thousands of interconnected SAG NWs operating under deep cryogenic conditions. Multiplexers enable a range of new strategies in quantum device research and scaling by increase the device count while limiting the number of connections between room-temperature control electronics and the cryogenic samples. As an example of this potential we perform a statistical characterization of large arrays of identical SAG quantum dots thus establishing the feasibility of applying cross-bar gating strategies for efficient scaling of future SAG quantum circuits.
description: Main text and Supplementary Information
Multi-wavelength analysis of high energy electrons in solar flares: a case study of August 20, 2002 flare
Creators: name: Kasparova, J.
name: Karlicky, M.
name: Kontar, E. P.
name: Schwartz, R. A.
name: Dennis, B. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A multi-wavelength spatial and temporal analysis of solar high energy electrons is conducted using the August 20, 2002 flare of an unusually flat (gamma=1.8) hard X-ray spectrum. The flare is studied using RHESSI, Halpha, radio, TRACE, and MDI observations with advanced methods and techniques never previously applied in the solar flare context. A new method to account for X-ray Compton backscattering in the photosphere (photospheric albedo) has been used to deduce the primary X-ray flare spectra. The mean electron flux distribution has been analysed using both forward fitting and model independent inversion methods of spectral analysis. We show that the contribution of the photospheric albedo to the photon spectrum modifies the calculated mean electron flux distribution, mainly at energies below 100 keV. The positions of the Halpha emission and hard X-ray sources with respect to the current-free extrapolation of the MDI photospheric magnetic field and the characteristics of the radio emission provide evidence of the closed geometry of the magnetic field structure and the flare process in low altitude magnetic loops. In agreement with the predictions of some solar flare models, the hard X-ray sources are located on the external edges of the Halpha emission and show chromospheric plasma heated by the non-thermal electrons. The fast changes of Halpha intensities are located not only inside the hard X-ray sources, as expected if they are the signatures of the chromospheric response to the electron bombardment, but also away from them.
description: 26 pages, 9 figures, accepted to Solar Physics
Bistability in Interstellar Gas-Phase Chemistry
Creators: name: Boger, Gai I.
name: Sternberg, Amiel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of "bistability" in gas-phase chemical models of dark interstellar clouds. We identify the chemical mechanisms that allow high- and low-ionization solutions to the chemical rate-equations to coexist. We derive simple analytic scaling relations for the gas densities and ionization rates for which the chemistry becomes bistable. We explain why bistability is sensitive to the H3+ dissociative recombination rate coefficient, and why it is damped by gas-grain neutralization.
description: Accepted for publication in the Astrophysical Journal
[Brev til DKNVS]
Creators: name: Angell, Jonas
name: Det Kongelige Norske Videnskabers Selskab (DKNVS)
Publisher: name: Unknown
Year: 1805

description: Berghauptmann Heltzen har tilbudt VS å få kjøpe hans "naturaliesamling". Underskriverne av brevet (Angell, Bang & Ackermann) sier at de savner forutsetninger for å vurdere samlingen, men foreslår en pris, 1000 Rdr.
Topological Data Analysis of Electroencephalogram Signals for Pediatric Obstructive Sleep Apnea
Creators: name: Manjunath, Shashank
name: Perea, Jose A.
name: Sathyanarayana, Aarti
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Topology (math.AT)
subject: Computational Geometry (cs.CG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Topological data analysis (TDA) is an emerging technique for biological signal processing. TDA leverages the invariant topological features of signals in a metric space for robust analysis of signals even in the presence of noise. In this paper, we leverage TDA on brain connectivity networks derived from electroencephalogram (EEG) signals to identify statistical differences between pediatric patients with obstructive sleep apnea (OSA) and pediatric patients without OSA. We leverage a large corpus of data, and show that TDA enables us to see a statistical difference between the brain dynamics of the two groups.
Finite-Entanglement Scaling of 2D Metals
Creators: name: Mortier, Quinten
name: Li, Ming-Hao
name: Haegeman, Jutho
name: Bultinck, Nick
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We extend the study of finite-entanglement scaling from one-dimensional gapless models to two-dimensional systems with a Fermi surface. In particular, we show that the entanglement entropy of a contractible spatial region with linear size $L$ scales as $S\sim L\log[ξf(L/ξ)]$ in the optimal tensor network, and hence area-law entangled, state approximation to a metallic state, where $f(x)$ is a scaling function which depends on the shape of the Fermi surface and $ξ$ is a finite correlation length induced by the restricted entanglement. Crucially, the scaling regime can be realized with numerically tractable bond dimensions. We also discuss the implications of the Lieb-Schultz-Mattis theorem at fractional filling for tensor network state approximations of metallic states.
description: 7 pages, 4 figures, 22 pages Supplemental Material Small changes in correspondence to the PRL publication
MORPH-DSLAM: Model Order Reduction for PHysics-based Deformable SLAM
Creators: name: Badias, Alberto
name: Alfaro, Iciar
name: Gonzalez, David
name: Chinesta, Francisco
name: Cueto, Elias
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We propose a new methodology to estimate the 3D displacement field of deformable objects from video sequences using standard monocular cameras. We solve in real time the complete (possibly visco-)hyperelasticity problem to properly describe the strain and stress fields that are consistent with the displacements captured by the images, constrained by real physics. We do not impose any ad-hoc prior or energy minimization in the external surface, since the real and complete mechanics problem is solved. This means that we can also estimate the internal state of the objects, even in occluded areas, just by observing the external surface and the knowledge of material properties and geometry. Solving this problem in real time using a realistic constitutive law, usually non-linear, is out of reach for current systems. To overcome this difficulty, we solve off-line a parametrized problem that considers each source of variability in the problem as a new parameter and, consequently, as a new dimension in the formulation. Model Order Reduction methods allow us to reduce the dimensionality of the problem, and therefore, its computational cost, while preserving the visualization of the solution in the high-dimensionality space. This allows an accurate estimation of the object deformations, improving also the robustness in the 3D points estimation.
Tracing Pop III supernovae with extreme energies through the Sculptor dwarf spheroidal galaxy
Creators: name: Skúladóttir, Ása
name: Vanni, Irene
name: Salvadori, Stefania
name: Lucchesi, Romain
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Sculptor dwarf spheroidal galaxy is old and metal-poor, making it ideal to study the earliest chemical enrichment in the Local Group. We followed up the most metal-poor star known in this (or any external) galaxy, AS0039, with high-resolution ESO VLT/UVES spectra. Our new analysis confirmed its low metallicity, [Fe/H]=-3.90, and that it is extremely C-poor, with A(C)=+3.60, which corresponds to [C/Fe]=-0.33 (accounting for internal mixing). This adds to the evidence of Sculptor being intrinsically C-poor at low [Fe/H]. However, here we also report a new discovery of a carbon-enhanced metal-poor star in Sculptor, DR20080, with no enhancement of Ba (CEMP-no), indicative of enrichment by zero-metallicity low-energy supernovae. This is the first evidence of a dual population of CEMP-no and C-normal stars in Sculptor at $\rm[Fe/H]\leq{-3}$. The fraction of CEMP-no stars is still low, $9^{+11}_{-8}\%$ at $\rm -4\leq[Fe/H]\leq-3$, compared to the significantly higher fraction in the Milky Way halo, $\approx40\%$. In addition, we re-derive chemical abundances of light, $α$-, iron peak, and neutron-capture elements in all Sculptor stars at $\rm [Fe/H]\leq-2.8$, with available high-resolution spectra. Our results show that at these low [Fe/H], Sculptor is deficient in light elements (e.g. C, Na, Al, Mg) relative to both the Milky Way halo, and ultra-faint dwarf galaxies, pointing towards significant contribution of high-energy supernovae. Furthermore, the abundance pattern of the star AS0039 is best fitted with a zero-metallicity hypernova progenitor, with a mass of $M=20$M$_\odot$. Our results in Sculptor, at $\rm[Fe/H]\leq-3$, therefore suggest significant enrichment by both very low-energy supernovae and hypernovae, solidifying this galaxy as one of the benchmarks for understanding the energy distribution of the first supernova in the Universe.
description: Accepted in A&A
The hydraulic jump as a white hole
Creators: name: Volovik, G. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In the geometry of the circular hydraulic jump, the velocity of the liquid in the interior region exceeds the speed of capillary-gravity waves (ripplons), whose spectrum is `relativistic' in the shallow water limit. The velocity flow is radial and outward, and thus the relativistic ripplons cannot propagating into the interior region. In terms of the effective 2+1 dimensional Painleve-Gullstrand metric appropriate for the propagating ripplons, the interior region imitates the white hole. The hydraulic jump represents the physical singularity at the white-hole horizon. The instability of the vacuum in the ergoregion inside the circular hydraulic jump and its observation in recent experiments on superfluid 4He by E. Rolley, C. Guthmann, M.S. Pettersen and C. Chevallier in physics/0508200 are discussed.
description: 10 pages, no figures, references added, version submitted to JETP Letters
On contact numbers of locally separable unit sphere packings
Creators: name: Bezdek, Károly
Publisher: name: arXiv
Year: 2020
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: The contact number of a packing of finitely many balls in Euclidean $d$-space is the number of touching pairs of balls in the packing. A prominent subfamily of sphere packings is formed by the so-called totally separable sphere packings: here, a packing of balls in Euclidean $d$-space is called totally separable if any two balls can be separated by a hyperplane such that it is disjoint from the interior of each ball in the packing. Bezdek, Szalkai and Szalkai (Discrete Math. 339(2): 668-676, 2016) upper bounded the contact numbers of totally separable packings of $n$ unit balls in Euclidean $d$-space in terms of $n$ and $d$. In this paper we improve their upper bound and extend that new upper bound to the so-called locally separable packings of unit balls. We call a packing of unit balls a locally separable packing if each unit ball of the packing together with the unit balls that are tangent to it form a totally separable packing. In the plane, we prove a crystallization result by characterizing all locally separable packings of $n$ unit disks having maximum contact number.
description: 16 pages, 9 figures
Hybrid quantum learning with data re-uploading on a small-scale superconducting quantum simulator
Creators: name: Tolstobrov, Aleksei
name: Fedorov, Gleb
name: Sanduleanu, Shtefan
name: Kadyrmetov, Shamil
name: Vasenin, Andrei
name: Bolgar, Aleksey
name: Kalacheva, Daria
name: Lubsanov, Viktor
name: Dorogov, Aleksandr
name: Zotova, Julia
name: Shlykov, Peter
name: Dmitriev, Aleksei
name: Tikhonov, Konstantin
name: Astafiev, Oleg V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Supervised quantum learning is an emergent multidisciplinary domain bridging between variational quantum algorithms and classical machine learning. Here, we study experimentally a hybrid classifier model accelerated by a quantum simulator - a linear array of four superconducting transmon artificial atoms - trained to solve multilabel classification and image recognition problems. We train a quantum circuit on simple binary and multi-label tasks, achieving classification accuracy around 95%, and a hybrid model with data re-uploading with accuracy around 90% when recognizing handwritten decimal digits. Finally, we analyze the inference time in experimental conditions and compare the performance of the studied quantum model with known classical solutions.
description: 11 pages, 6 figures
ИССЛЕДОВАНИЕ ИННОВАЦИОННОЙ КОНЦЕПЦИИ ЭМОЦИОНАЛЬНОГО МАРКЕТИНГА
Creators: name: ЗЕМЛЯННАЯ А.С.
name: САВОСТИН Д.А.
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2020
Subjects: ЭМОЦИОНАЛЬНЫЙ МАРКЕТИНГ
ИННОВАЦИОННЫЕ МАРКЕТИНГОВЫЕ КОНЦЕПЦИИ
ЭМОЦИИ В МАРКЕТИНГЕ
ПОВЕДЕНИЕ ПОТРЕБИТЕЛЕЙ
ПОТРЕБИТЕЛЬСКИЕ ЭМОЦИИ
EMOTIONAL MARKETING
INNOVATIVE MARKETING CONCEPTS
EMOTIONS IN MARKETING
CONSUMER BEHAVIOR
CONSUMER EMOTIONS

description: В статье рассмотрены подходы отечественных и зарубежных авторов к концепции эмоционального маркетинга. Авторы провели кабинетное исследование и выявили черты характерные для данной концепции, а также выявили типы эмоций, которые оказывают влияние на потребительский выбор.
Mechanisms of DNA-mediated allostery
Creators: name: Segers, Midas
name: Voorspoels, Aderik
name: Sakaue, Takahiro
name: Carlon, Enrico
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Proteins often regulate their activities via allostery - or action at a distance - in which the binding of a ligand at one binding site influences the affinity for another ligand at a distal site. Although less studied than in proteins, allosteric effects have been observed in experiments with DNA as well. In these experiments two or more proteins bind at distinct DNA sites and interact indirectly with each other, via a mechanism mediated by the linker DNA molecule. We develop a mechanical model of DNA/protein interactions which predicts three distinct mechanisms of allostery. Two of these involve an enthalpy-mediated allostery, while a third mechanism is entropy driven. We analyze experiments of DNA allostery and highlight the distinctive signatures allowing one to identify which of the proposed mechanisms best fits the data.
Immutable Log Storage as a Service on Private and Public Blockchains
Creators: name: Pourmajidi, William
name: Zhang, Lei
name: Steinbacher, John
name: Erwin, Tony
name: Miranskyy, Andriy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Cryptography and Security (cs.CR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Service Level Agreements (SLA) are employed to ensure the performance of Cloud solutions. When a component fails, the importance of logs increases significantly. All departments may turn to logs to determine the cause of the issue and find the party at fault. The party at fault may be motivated to tamper with the logs to hide their role. We argue that the critical nature of Cloud logs calls for immutability and verification mechanism without the presence of a single trusted party. This paper proposes such a mechanism by describing a blockchain-based log storage system, called Logchain, which can be integrated with existing private and public blockchain solutions. Logchain uses the immutability feature of blockchain to provide a tamper-resistance platform for log storage. Additionally, we propose a hierarchical structure to address blockchains' scalability issues. To validate the mechanism, we integrate Logchain into Ethereum and IBM Blockchain. We show that the solution is scalable and perform the analysis of the cost of ownership to help a reader select an implementation that would address their needs. The Logchain's scalability improvement on a blockchain is achieved without any alteration of blockchains' fundamental architecture. As shown in this work, it can function on private and public blockchains and, therefore, can be a suitable alternative for organizations that need a secure, immutable log storage platform.
description: Accepted for publication in IEEE Transactions on Services Computing
Random walks and polymers in the presence of quenched disorder
Creators: name: Monthus, Cecile
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: After a general introduction to the field, we describe some recent results concerning disorder effects on both `random walk models', where the random walk is a dynamical process generated by local transition rules, and on `polymer models', where each random walk trajectory representing the configuration of a polymer chain is associated to a global Boltzmann weight. For random walk models, we explain, on the specific examples of the Sinai model and of the trap model, how disorder induces anomalous diffusion, aging behaviours and Golosov localization, and how these properties can be understood via a strong disorder renormalization approach. For polymer models, we discuss the critical properties of various delocalization transitions involving random polymers. We first summarize some recent progresses in the general theory of random critical points : thermodynamic observables are not self-averaging at criticality whenever disorder is relevant, and this lack of self-averaging is directly related to the probability distribution of pseudo-critical temperatures $T_c(i,L)$ over the ensemble of samples $(i)$ of size $L$. We describe the results of this analysis for the bidimensional wetting and for the Poland-Scheraga model of DNA denaturation.
description: 17 pages, Conference Proceedings "Mathematics and Physics", I.H.E.S., France, November 2005
Is Support Set Diversity Necessary for Meta-Learning?
Creators: name: Setlur, Amrith
name: Li, Oscar
name: Smith, Virginia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Meta-learning is a popular framework for learning with limited data in which an algorithm is produced by training over multiple few-shot learning tasks. For classification problems, these tasks are typically constructed by sampling a small number of support and query examples from a subset of the classes. While conventional wisdom is that task diversity should improve the performance of meta-learning, in this work we find evidence to the contrary: we propose a modification to traditional meta-learning approaches in which we keep the support sets fixed across tasks, thus reducing task diversity. Surprisingly, we find that not only does this modification not result in adverse effects, it almost always improves the performance for a variety of datasets and meta-learning methods. We also provide several initial analyses to understand this phenomenon. Our work serves to: (i) more closely investigate the effect of support set construction for the problem of meta-learning, and (ii) suggest a simple, general, and competitive baseline for few-shot learning.
The Angstrom Project: a microlensing survey of the structure and composition of the bulge of the Andromeda galaxy
Creators: name: Kerins, E.
name: Darnley, M. J.
name: Duke, J.
name: Gould, A.
name: Han, C.
name: Jeon, Y. -B.
name: Newsam, A.
name: Park, B. -G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Andromeda Galaxy Stellar Robotic Microlensing Project (The Angstrom Project) aims to use stellar microlensing events to trace the structure and composition of the inner regions of the Andromeda Galaxy (M31). We present microlensing rate and timescale predictions and spatial distributions for stellar and sub-stellar lens populations in combined disk and barred bulge models of M31. We show that at least half of the stellar microlenses in and around the bulge are expected to have characteristic durations between 1 and 10 days, rising to as much as 80% for brown-dwarf dominated mass functions. These short-duration events are mostly missed by current microlensing surveys that are looking for Macho candidates in the M31 dark matter halo. Our models predict that an intensive monitoring survey programme such as Angstrom, which will be able to detect events of durations upwards of a day, could detect around 30 events per season within ~5 arcminutes of the M31 centre, due to ordinary low-mass stars and remnants. This yield increases to more than 60 events for brown-dwarf dominated mass functions. The overall number of events and their average duration are sensitive diagnostics of the bulge mass, in particular the contribution of low-mass stars and brown dwarfs. The combination of an inclined disk, an offset bar-like bulge, and differences in the bulge and disk luminosity functions results in a four-way asymmetry in the number of events expected in each quadrant defined by the M31 disk axes. The asymmetry is sensitive to the bar prolongation, orientation and mass.
description: 9 pages, submitted to MNRAS