cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Unambiguous Detection of Faraday Rotation in Sagittarius A*
Creators: name: Marrone, D. P.
name: Moran, J. M.
name: Zhao, J. -H.
name: Rao, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The millimeter/submillimeter wavelength polarization of Sgr A* is known to be variable in both magnitude and position angle on time scales down to a few hours. The unstable polarization has prevented measurements made at different frequencies and different epochs from yielding convincing measurements of Faraday rotation in this source. Here we present observations made with the Submillimeter Array polarimeter at 227 and 343 GHz with sufficient sensitivity to determine the rotation measure at each band without comparing position angles measured at separate epochs. We find the 10-epoch mean rotation measure to be (-5.6+/-0.7)x10^5 rad/m^2; the measurements are consistent with a constant value. We conservatively assign a 3sigma upper limit of 2x10^5 rad/m^2 to rotation measure changes, which limits accretion rate fluctuations to 25%. This rotation measure detection limits the accretion rate to less than 2x10^-7 M_sun/yr if the magnetic field is near equipartition, ordered, and largely radial, while a lower limit of 2x10^-9 M_sun/yr holds even for a sub-equipartition, disordered, or toroidal field. The mean intrinsic position angle is 167+/-7 degrees and we detect variations of 31(+18/-9) degrees. These variations must originate in the submillimeter photosphere, rather than arising from rotation measure changes.
description: 5 pages, 1 figure. To appear in the Astrophysical Journal Letters
Independence and Impartiality in Arbitration and Mediation: Caesar’s Wife must be above Suspicion
Creators: name: Svatoš, Martin
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2019

description: Summary: 1. Introduction. – 2. Neutrality as a Core Issue. – 3. Chaos in the Terminology. – 4. Conflict of Interest and Ethics. – 5. Same duty, different sanctions…?
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 69, N. 3-4 (2018): Sessant'anni di studi giuridici europei a Urbino: il Séminaire de Droit Européen
Trusting a Double Agent
Creators: name: Grant, William C.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology

description: We analyze trust in a game with a double agent and two adversarial intelligence organizations. Greater trust by one organization makes the agent more inclined to align against that organization because the intelligence advantage sought by the agent must come at the expense of a trustor. Conversely, trusting less than the rival organization makes the agent more tempted to double-cross the rival. We identify conditions for a sequential equilibrium where one organization mixes between trust and distrust and the profit-seeking double agent mixes her alignment between the two organizations. When the game includes both profit-seeking and organization-loyal types of agents, semi-separating equilibria are possible, depending on the distribution of agent types and the quality of information about agents’ trustworthiness. Pure-strategy trust by both organizations can be sequentially rational only with the existence of loyal types.
Non-convergence of the spherical harmonic expansion of gravitational potential below the Brillouin sphere; the continuous case
Creators: name: Ogle, C.
name: Costin, O.
name: Bevis, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B09, 40A05, 40A30, 31B99, 86-10, 86A30

description: For a singleton planet $P$ with gravitational potential $V$, we show that for each $\varepsilon > 0$ there exists a planet $P'$ with gravitational potential $V'$, with $(P',V')$ "$\varepsilon$-close" to $(P,V)$ (in an appropriate $C^0$-sense) for which the spherical harmonic expansion of $V'$ does not extend more than a distance $\varepsilon$ below the Brillouin sphere of $P'$.
description: 8 pages, 1 figure
Real-time motion tracking of mobile robots via image registgration
Creators: name: Soroushi, Atousa
Publisher: name: University of British Columbia
Year: 2009

description: In order to have accurate, safe and reliable remote control for mobile robots, it is necessary to track their motion. With new high technology systems, fools for imaging and image acquisition are becoming less expensive every day. Consequently, vision-based systems are considered practical for tracking purposes. Most of the present motion-detection systems used for control of heavy duty hydraulic machines depend on external equipment like inertial sensors, deadreckoning or laser beacons. There are also a few existing systems for navigation purposes that are based on vision, but they do not perform in real-time or they require a partially known environment. The goal of this thesis is the design and implementation of a stand-alone motiontracking system, to track the local motion of a machine-mounted down-looking camera in realtime. By installing the camera under the base of a mobile robot, the local trajectory of that robot in an unstructured environment can be tracked. In the present work we use a computational vision approach to design an image registration system to estimate the two dimensional translation, rotation and small scaling factor from two partially overlapping Images. This is done in real-time (about 20 frames per second) even when there is simultaneous rotation and translation occurring between the two successive frames and images may have few significant features. To reduce the processing time and obtain information from different regions of the image, we process only selected regions of interest of the original image. An initial estimate is used to select those regions, so that regions contain similar features with the least possible disparity. This method, with the aid of a coarse-to-fine search method, makes the motion-detection algorithm able to execute in about 45ms and detect a dependable rotation of up to 11.25 degrees and translations of up to 8 pixels for each pair of image frames.
Balls-in-boxes condensation on networks
Creators: name: Bogacz, L.
name: Burda, Z.
name: Janke, W.
name: Waclaw, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We discuss two different regimes of condensate formation in zero-range processes on networks: on a q-regular network, where the condensate is formed as a result of a spontaneous symmetry breaking, and on an irregular network, where the symmetry of the partition function is explicitly broken. In the latter case we consider a minimal irregularity of the q-regular network introduced by a single Q-node with degree Q>q. The statics and dynamics of the condensation depends on the parameter log(Q/q), which controls the exponential fall-off of the distribution of particles on regular nodes and the typical time scale for melting of the condensate on the Q-node which increases exponentially with the system size $N$. This behavior is different than that on a q-regular network where log(Q/q)=0 and where the condensation results from the spontaneous symmetry breaking of the partition function, which is invariant under a permutation of particle occupation numbers on the q-nodes of the network. In this case the typical time scale for condensate melting is known to increase typically as a power of the system size.
description: 7 pages, 3 figures, submitted to the "Chaos" focus issue on "Optimization in Networks" (scheduled to appear as Volume 17, No. 2, 2007)
Five hundred years on five thousand acres: Human attitudes and land-use at Nassawango Creek
Creators: name: Quesada-Embid, Mercedes
Publisher: name: Maryland Shared Open Access Repository
Year: 2004
Subjects: History
Nassawango Creek
Land-use

description: This study describes the environmental transformations that occurred on Nassawango Creek from 1500-2000 as it went from a Native American reservation to an industrial hinterland, and presently, to a preservation site. The purpose of this research is to compile, relate, and analyze the fragmented and turbulent history of Nassawango as it was altered by and reflects each respective stage. Humans were the driving force in determining the dramatic shifts in the ways in which the land was used. Understanding the relationship between the human perception of nature and the resulting land-use, allows for a more comprehensive appreciation of Nassawango as a historical place. Expanding the know ledge of the history of this landscape also makes the continued goal of historical, cultural and ecological preservation all the more significant.
Le origini della responsabilità medica nello scenario internazionale fino alla redazione del Codice Deontologico
Creators: name: Ascani, Cecilia
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2019

description: Sommario: 1. I primi casi di sperimentazione medica della storia. – 2. Il processo di Tokio. – 3. La Dichiarazione di Helsinki. – 4. Il codice deontologico e il giuramento di Ippocrate.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 69, N. 3-4 (2018): Sessant'anni di studi giuridici europei a Urbino: il Séminaire de Droit Européen
Tuning the electrical conductivity of nanotube-encapsulated metallocene wires
Creators: name: Garcia-Suarez, V. M.
name: Ferrer, J.
name: Lambert, C. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze a new family of carbon nanotube-based molecular wires, formed by encapsulating metallocene molecules inside the nanotubes. Our simulations, that are based on a combination of non-equilibrium Green function techniques and density functional theory, indicate that these wires can be engineered to exhibit desirable magnetotransport effects for use in spintronics devices. The proposed structures should also be resilient to room-temperature fluctuations, and are expected to have a high yield.
description: 4 pages, 6 figures. Accepted in Physical Review Letters
Brevi appunti sul diritto romano nella cultura giuridica americana: a margine di alcune sentenze
Creators: name: Biccari, Maria Luisa
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2019

description: Sommario: 1. Realtà di un “diritto romano” in America. – 2. Uno sguardo attraverso alcune sentenze. – 3. Spunti per un confronto continuo.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 69, N. 3-4 (2018): Sessant'anni di studi giuridici europei a Urbino: il Séminaire de Droit Européen
A Brief Historical Overview of Curriculum in Early Childhood Care and Education
Creators: name: Ritchie, Jenny
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2024
Subjects: classificationCode: 39
subject: Education
classificationCode: 3901
subject: Curriculum and pedagogy
classificationCode: 3903
subject: Education systems
classificationCode: 44
subject: Human society
classificationCode: 4410
subject: Sociology
subject: FOS: Sociology

description: No description supplied
Higher Spin Gravitational Couplings and the Yang--Mills Detour Complex
Creators: name: Gover, A. R.
name: Hallowell, K.
name: Waldron, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Gravitational interactions of higher spin fields are generically plagued by inconsistencies. We present a simple framework that couples higher spins to a broad class of gravitational backgrounds (including Ricci flat and Einstein) consistently at the classical level. The model is the simplest example of a Yang--Mills detour complex, which recently has been applied in the mathematical setting of conformal geometry. An analysis of asymptotic scattering states about the trivial field theory vacuum in the simplest version of the theory yields a rich spectrum marred by negative norm excitations. The result is a theory of a physical massless graviton, scalar field, and massive vector along with a degenerate pair of zero norm photon excitations. Coherent states of the unstable sector of the model do have positive norms, but their evolution is no longer unitary and their amplitudes grow with time. The model is of considerable interest for braneworld scenarios and ghost condensation models, and invariant theory.
description: 19 pages LaTeX
Tungsten Thermionic Emission as a Gauge for Low Pressures of Cesium Vapor
Creators: name: Shida, João F.
name: Wu, Fangjian
name: Spieglan, Eric
name: Çalışkan, Mesut
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Heated metal filaments under electric fields and low pressures of alkali metal gaseject electrons by thermionic emission as a function of the pressure of the gas and thetemperature of the filament. To explore this process in a program to develop large-area alkali metal photocathodes, we have designed and built a gauge following thestudies of Taylor and Langmuir. We present proof-of-principle measurements ofthe thermionic emission of a tungsten filament in cesium vapor. We describe a secondgeneration design that corrects flaws in the first gauge.
description: 9 figures, 14 pages
Optimal boarding method for airline passengers
Creators: name: Steffen, Jason H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Using a Markov Chain Monte Carlo optimization algorithm and a computer simulation, I find the passenger ordering which minimizes the time required to board the passengers onto an airplane. The model that I employ assumes that the time that a passenger requires to load his or her luggage is the dominant contribution to the time needed to completely fill the aircraft. The optimal boarding strategy may reduce the time required to board and airplane by over a factor of four and possibly more depending upon the dimensions of the aircraft. In addition, knowledge of the optimal boarding procedure can inform decisions regarding changes to methods that are employed by a particular carrier. I explore some of the salient features of the optimal boarding method and discuss practical modifications to the optimal. Finally, I mention some of the benefits that could come from implementing an improved passenger boarding scheme.
description: Accepted for publication in the Journal of Air Transport Management. This study was motivated by an experience that occurred while traveling to a conference. Version 1: 15 pages, 7 figures--likely to be of more technical interest. Version 2: 14 pages, 6 figures--more complete bibliography and some additional commentary
Optimal finite-time processes in stochastic thermodynamics
Creators: name: Schmiedl, Tim
name: Seifert, Udo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: For a small system like a colloidal particle or a single biomolecule embedded in a heat bath, the optimal protocol of an external control parameter minimizes the mean work required to drive the system from one given equilibrium state to another in a finite time. In general, this optimal protocol obeys an integro-differential equation. Explicite solutions both for a moving laser trap and a time-dependent strength of such a trap show finite jumps of the optimal protocol to be typical both at the beginning and the end of the process.
description: 4 pages, 1 figure, accepted for publication in Phys. Rev. Lett
Kinetic and hydrodynamic regimes in multi-particle-collision dynamics of a one-dimensional fluid with thermal walls
Creators: name: Lepri, Stefano
name: Ciraolo, Guido
name: Di Cintio, Pierfrancesco
name: Gunn, Jamie
name: Livi, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the non-equilibrium steady-states of a one-dimensional ($1D1V$) fluid in a finite space region of length $L$. Particles interact among themselves by multi-particle collisions and are in contact with two thermal-wall heat reservoirs, located at the boundaries of the region. After an initial ballistic regime, we find a crossover from a normal (kinetic) transport regime to an anomalous (hydrodynamic) one, above a characteristic size $L_*$. We argue that $L_*$ is proportional to the cube of the collision time among particles. Motivated by the physics of emissive divertors in fusion plasma, we consider the more general case of thermal walls injecting particles with given average (non-thermal) velocity. For fast and relatively cold particles, short systems fail to establish local equilibrium and display non-Maxwellian distributions of velocities.
description: Accepted for publication in Physical Review Research
Realistic boundary conditions for stochastic simulations of reaction-diffusion processes
Creators: name: Erban, Radek
name: Chapman, S. Jonathan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Many cellular and subcellular biological processes can be described in terms of diffusing and chemically reacting species (e.g. enzymes). Such reaction-diffusion processes can be mathematically modelled using either deterministic partial-differential equations or stochastic simulation algorithms. The latter provide a more detailed and precise picture, and several stochastic simulation algorithms have been proposed in recent years. Such models typically give the same description of the reaction-diffusion processes far from the boundary of the simulated domain, but the behaviour close to a reactive boundary (e.g. a membrane with receptors) is unfortunately model-dependent. In this paper, we study four different approaches to stochastic modelling of reaction-diffusion problems and show the correct choice of the boundary condition for each model. The reactive boundary is treated as partially reflective, which means that some molecules hitting the boundary are adsorbed (e.g. bound to the receptor) and some molecules are reflected. The probability that the molecule is adsorbed rather than reflected depends on the reactivity of the boundary (e.g. on the rate constant of the adsorbing chemical reaction and on the number of available receptors), and on the stochastic model used. This dependence is derived for each model.
description: 24 pages, submitted to Physical Biology
An update to the MARVEL dataset and ExoMol line list for 12C2
Creators: name: McKemmish, Laura K.
name: Syme, Anna-Maree
name: Borsovszky, Jasmin
name: Yurchenko, Sergei N.
name: Tennyson, Jonathan
name: Furtenbacher, Tibor
name: Csaszar, Attila G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The spectrum of dicarbon (C2) is important in astrophysics and for spectroscopic studies of plasmas and flames. The C2 spectrum is characterized by many band systems with new ones still being actively identified; astronomical observations involve eight of these bands. Recently, Furtenbacher et al. (2016, Astrophys. J. Suppl., 224, 44) presented a set of 5699 empirical energy levels for 12C2, distributed among 11 electronic states and 98 vibronic bands, derived from 42 experimental studies and obtained using the MARVEL (Measured Active Rotational-Vibrational Energy Levels) procedure. Here, we add data from 13 new sources and update data from 5 sources. Many of these data sources characterize high-lying electronic states, including the newly detected 3Pig state. Older studies have been included following improvements in the MARVEL procedure which allow their uncertainties to be estimated. These older works in particular determine levels in the C1Pig state, the upper state of the insufficiently characterized Deslandres-d'Azambuja (C1Pig-A1Piu) band. The new compilation considers a total of 31323 transitions and derives 7047 empirical(MARVEL) energy levels spanning 20 electronic and 142 vibronic states. These new empirical energy levels are used here to update the 8states C2 ExoMol line list. This updated line list is highly suitable for high-resolution cross-correlation studies in astronomical spectroscopy of, for example, exoplanets, as 99.4% of the transitions with intensities over 10^(-18) cm/molecule at 1000 K have frequencies determined by empirical energy levels.
Strong Pinning Enhancement in MgB2 Using Very Small Dy2O3 Additions
Creators: name: Chen, S. K.
name: Wei, M.
name: MacManus-Driscoll, J. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: 0.5 to 5.0 wt.% Dy2O3 was in-situ reacted with Mg + B to form pinned MgB2. While Tc remained largely unchanged, Jc was strongly enhanced. The best sample (only 0.5 wt.% Dy2O3) had a Jc of 6.5 x 10^5 A/cm^2 at 6K, 1T and 3.5 x 10^5 A/cm^2 at 20K, 1T, around a factor of 4 higher compared to the pure sample, and equivalent to hot-pressed or nano-Si added MgB2 at below 1T. Even distributions of nano-scale precipitates of DyB4 and MgO were observed within the grains. The room temperature resistivity decreased with Dy2O3 indicative of improved grain connectivity.
description: 13 pages, 4 figures and 1 table
The Stellar Imager (SI) Vision Mission
Creators: name: Carpenter, Kenneth G.
name: Schrijver, Carolus J.
name: Karovska, Margarita
name: Team, SI Vision Mission
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Stellar Imager (SI) is a UV-Optical, Space-Based Interferometer designed to enable 0.1 milli-arcsecond (mas) spectral imaging of stellar surfaces and of the Universe in general and asteroseismic imaging of stellar interiors. SI is identified as a "Flagship and Landmark Discovery Mission" in the 2005 Sun Solar System Connection (SSSC) Roadmap and as a candidate for a "Pathways to Life Observatory" in the Exploration of the Universe Division (EUD) Roadmap (May, 2005). SI will revolutionize our view of many dynamic astrophysical processes: its resolution will transform point sources into extended sources, and snapshots into evolving views. SI's science focuses on the role of magnetism in the Universe, particularly on magnetic activity on the surfaces of stars like the Sun. SI's prime goal is to enable long-term forecasting of solar activity and the space weather that it drives. SI will also revolutionize our understanding of the formation of planetary systems, of the habitability and climatology of distant planets, and of many magneto-hydrodynamically controlled processes in the Universe. The results of the SI "Vision Mission" Study are presented in this paper. Additional information on the SI mission concept and related technology development can be found at URL: http://hires.gsfc.nasa.gov/si/.
description: 12 pages, 3 figures, to appear in Proceedings SPIE Conf. 6268 (Orlando)
Uncertainty over Uncertainty: Investigating the Assumptions, Annotations, and Text Measurements of Economic Policy Uncertainty
Creators: name: Keith, Katherine A.
name: Teichmann, Christoph
name: O'Connor, Brendan
name: Meij, Edgar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Methods and applications are inextricably linked in science, and in particular in the domain of text-as-data. In this paper, we examine one such text-as-data application, an established economic index that measures economic policy uncertainty from keyword occurrences in news. This index, which is shown to correlate with firm investment, employment, and excess market returns, has had substantive impact in both the private sector and academia. Yet, as we revisit and extend the original authors' annotations and text measurements we find interesting text-as-data methodological research questions: (1) Are annotator disagreements a reflection of ambiguity in language? (2) Do alternative text measurements correlate with one another and with measures of external predictive validity? We find for this application (1) some annotator disagreements of economic policy uncertainty can be attributed to ambiguity in language, and (2) switching measurements from keyword-matching to supervised machine learning classifiers results in low correlation, a concerning implication for the validity of the index.
description: Accepted to the 2020 Natural Language Processing + Computational Social Science Workshop (NLP+CSS) at EMNLP
Molecular model for de Vries type smectic A - smectic C phase transition in liquid crystals
Creators: name: Gorkunov, M. V.
name: Osipov, M. A.
name: Giesselmann, F.
name: Sluckin, T. J.
name: Lagerwall, J. P. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We develop a theory of Smectic A - Smectic C phase transition with anomalously weak smectic layer contraction. We construct a phenomenological description of this transition by generalizing the Chen-Lubensky model. Using a mean-field molecular model, we demonstrate that a relatively simple interaction potential suffices to describe the transition. The theoretical results are in excellent agreement with experimental data.
description: Submitted to Phys. Rev. Lett
Contractively complemented subspaces of pre-symmetric spaces
Creators: name: Neal, Matthew
name: Russo, Bernard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B04, 46L70, 17C65

description: In 1965, Ron Douglas proved that if $X$ is a closed subspace of an $L^1$-space and $X$ is isometric to another $L^1$-space, then $X$ is the range of a contractive projection on the containing $L^1$-space. In 1977 Arazy-Friedman showed that if a subspace $X$ of $C_1$ is isometric to another $C_1$-space (possibly finite dimensional), then there is a contractive projection of $C_1$ onto $X$. In 1993 Kirchberg proved that if a subspace $X$ of the predual of a von Neumann algebra $M$ is isometric to the predual of another von Neumann algebra, then there is a contractive projection of the predual of $M$ onto $X$. We widen significantly the scope of these results by showing that if a subspace $X$ of the predual of a $JBW^*$-triple $A$ is isometric to the predual of another $JBW^*$-triple $B$, then there is a contractive projection on the predual of $A$ with range $X$, as long as $B$ does not have a direct summand which is isometric to a space of the form $L^\infty(Ω,H)$, where $H$ is a Hilbert space of dimension at least two. The result is false without this restriction on $B$.
description: 25 pages
title: Сравнительный анализ различных методов прогнозирования временных рядов производственных показателей предприятия на примере задачи выдачи денежных средств в банкомате кредитной организации
title: Тhe Comparative Analysis of Various Methods for Time Series Forecasting of Production Indicators of an Enterprise on the Example of the Problem of Cash Assets Withdrawal at an Automated Teller Machine of a Credit Institution
Creators: name: Багаутдинов, К. Ш.
Publisher: name: Издательский центр СурГУ
Year: 2021

description: Рассмотрена актуальная проблема обслуживания автоматизированных депозитных машин и банкоматов кредитных организаций. Решение задачи прогнозирования поможет автоматизировать процесс управления инкассацией и организовать оптимальную плановую загрузку устройств самообслуживания с целью минимизации времени их недоступности. Для решения задачи прогнозирования проведен сравнительный анализ математических методов прогнозирования временных рядов: модели экспоненциального сглаживания, сезонной интегрированной модели авторегрессии (скользящего среднего) и моделей, основанных на нейронных сетях (однослойная нейронная сеть и нейро-нечеткая сеть). Анализ проведен на базе данных о количестве снятых денежных средств из банкомата на закрытой территории бизнес-центра. В результате выявлен наилучший метод прогнозирования (нейро-нечеткая сеть) и получен прогноз выдачи наличных денежных средств для устройства самообслуживания. Управление плановой загрузкой банкоматов, основанное на полученном прогнозе, минимизирует время технического простоя устройства при избытке или недостатке наличных денежных средств, а также позволяет оптимизировать работу инкассаторов.
description: The article analyzes a current problem of maintaining a service of automated deposit machines and ATMs of credit institutions. Solution of the forecasting problem will help in automating the process of cash collection management and organizing an efficient planned load of a self-service machine in order to minimize time when the machine is unavailable for service. To solve the forecasting problem, the comparative analysis of existing mathematical methods of time series forecasting (such as exponential smoothing models, seasonal autoregressive integrated models (moving average) and models based on the neural networks (single-layer neural network and neural-fuzzy network)) is obtained. The analysis is carried out based on the data of the amount of cash withdrawn from the ATM in a closed area of the business center. As a result, the most efficient forecasting method (neural-fuzzy network) is determined and the forecast of cash withdrawal for the self-service machine is obtained. Management of a planned load of ATMs based on the obtained forecast minimizes time of technical delay of the machine in case of cash assets excess or shortage as well as allows optimizing the collector’s work.
The audiovisual resource as a pedagogical tools in times of covid 19. An empirical analysis of its efficiency
Creators: name: Basignana, Juan Rodriguez
name: Asuaga, Carolina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The global pandemic caused by the COVID virus led universities to a change in the way they teach classes, moving to a distance mode. The subject "Modelos y Sistemas de Costos " of the CPA career of the Faculty of Economic Sciences and Administration of the Universidad de la República (Uruguay) incorporated audiovisual material as a pedagogical resource consisting of videos recorded by a group of well experienced and highest ranked teachers. The objective of this research is to analyze the efficiency of the audiovisual resources used in the course, seeking to answer whether the visualizations of said materials follow certain patterns of behavior. 13 videos were analyzed, which had 16,340 views, coming from at least 1,486 viewers. It was obtained that the visualizations depend on the proximity to the test dates and that although the visualization time has a curve that accompanies the duration of the videos, it is limited and the average number of visualizations is 10 minutes and 4 seconds. It is also concluded that the efficiency in viewing time increases in short videos.
description: in Spanish, Journal of Internacional Institute of Cost 2020
Basic Teaching Requirements For E-Learning For History For Middle School Students (From The Point Of View Of Their Teachers)
Creators: name: Noor Readh Yassen,  Ahmed Amer Yahya Khalil
Publisher: name: Zenodo
Year: 2024
Subjects: Teaching Requirements , E-Learning , History

description: The current research aims (to identify the basic teaching requirements for e-learning for history for middle school students from the point of view of their teachers) and to achieve the aim of the research, the researcher used the descriptive research methodology and the researcher chose a random sample by 5% of the research community, as it amounted to (74) teachers and schools by (36) teachers and (38) schools distributed over the six directorates in Baghdad. Then the researcher prepared a questionnaire for the basic teaching requirements for e-learning for history for middle school students from the point of view of their teachers amounted to about (64) paragraphs divided into four areas, namely (the requirements to be met in the teacher - the requirements to be met in the student - and the requirements to be available in the educational environment - and the requirements to be met in the curriculum) and the questionnaire included a five-scale consisting of the following alternatives (the degree of importance is very high - high - medium - few - very few . The use of e-learning is weak among history teachers and teachers and they do not have knowledge of the requirements of e-learning.History teachers do not differ in their poor information about electronic teaching aids, educational technology, modern methods and methods, in addition to the fact that most history teachers and teachers do not have full knowledge of educational virtual applications and platforms. Training history teachers and holding continuous workshops to train teaching staff on the use of electronic technologies and integrating them into the education process.Taking into account the requirements identified in the questionnaire and providing them in schools and providing a technical and administrative staff in order to raise the efficiency of teachers during the use of technology and employ it in the education process.
Reconciling X-ray and 21cm HI absorption gas column densities toward obscured AGN
Creators: name: Liszt, Harvey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Hydrogen column densities inferred from X-ray absorption are typically 5 - 30 times larger than the neutral atomic hydrogen column densities derived from 21cm HI absorption toward radio-loud active galactic nuclei. Some part of the difference is ascribed to uncertainty in the spin temperature \Tsp\ = 100 K that is often used to convert 21cm HI HI absorption to N(HI). Here we propose another way to infer the gas column from HI absorption. In our Galaxy there is a nearly linear correlation between the inteferometrically-measured integrated 21cm HI absorption \WHI\ and reddening, \WHI\ $\propto$ \EBV$^{1.10}$ for \WHI\ $\ga 0.7$ \kms\ or \EBV\ $\ga 0.04$ mag. Scaling \EBV\ then provides the total gas column density N(H) from the same dust column that is responsible for optical obscuration and X-ray absorption, without calculating N(HI). Values of N(H) so derived typically exceed N(HI) by a factor 4 because the ubiquitous Galactic 21cm HI HI absorption samples only a portion of the interstellar gas. If the well-studied case of Hydra-A is a guide, even very large disparities in X-ray and 21cm HI gas column densities can be explained by resolving the core radiocontinuum and inferring N(H) from 21cm HI absorption. Milky Way conditions are often invoked in discussion of obscured AGN, so the empirical relationship seen in the Milky Way should be a relevant benchmark.
description: Accepted for ApJ
Visual and haptic detection of mirror-reflected symmetrical contours and repeated contours within one object versus across two objects
Creators: name: Lawson, Rebecca
name: Cecchetto, Stefano
Publisher: name: F1000Research
Year: 2015

description: For vision, detecting mirror-reflectional symmetry across two contours is usually easier if both belong to the same object rather than to two different objects whereas the opposite occurs for repetition (Koning & Wagemans, 2009). We investigated whether the same interaction is found when novel, planar shapes are explored by active touch (haptics). We varied modality (haptics or vision), regularity (mirror-reflection or repetition), objects (one or two) and axis orientation (vertical or horizontal). For both modalities, performance was better overall for mirror-reflection than for repetition. For vision we replicated the interaction between type of regularity and number of objects for both stereoscopic and monocular presentation. In contrast, for haptics there was a one object advantage for repetition as well as for mirror-reflection. Thus the perception of regularity appears to differ across vision and haptics depending on whether the regularity is found within a single object or across different objects. Other modality-specific factors were also important, such as whether the visual stimuli were shown from top-down versus angled views, and whether one versus two hands were used to feel the haptic stimuli. These findings demonstrate the powerful influence of how we acquire information and explore stimuli on our perception of regularity.
More Dual Fluxes and Moduli Fixing
Creators: name: Aldazabal, G.
name: Camara, P. G.
name: Font, A.
name: Ibanez, L. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We generalize the recent proposal that invariance under T-duality leads to additional non-geometric fluxes required so that superpotentials in type IIA and type IIB orientifolds match. We show that invariance under type IIB S-duality requires the introduction of a new set of fluxes leading to further superpotential terms. We find new classes of N=1 supersymmetric Minkowski vacua based on type IIB toroidal orientifolds in which not only dilaton and complex moduli but also Kahler moduli are fixed. The chains of dualities relating type II orientifolds to heterotic and M-theory compactifications suggests the existence of yet further flux degrees of freedom. Restricting to a particular type IIA/IIB or heterotic compactification only some of these degrees of freedom have a simple perturbative and/or geometric interpretation.
description: 50 pages, Latex file, no figures
Respiratory syncytial virus prolifically infects N2a neuronal cells, leading to TLR4 and nucleolin protein modulations and RSV F protein co-localization with TLR4 and nucleolin
Creators: Yuan, Xiaoling
Hu, Tao
He, Hanwen
Qiu, Huan
Wu, Xuan
Chen, Jingxian
Wang, Minmin
Chen, Cheng
Huang, Shenghai
Publisher: name: Columbia University
Year: 2018
Subjects: Respiratory syncytial virus
Virus diseases
Medicine
Biology
Pathology

description: Background
                Respiratory syncytial virus (RSV) infects the central nervous system, resulting in neurological symptoms. However, the precise underlying pathogenic mechanisms have not been elucidated. In the present study, the infectivity of RSV on N2a neuronal cells and the possible roles of Toll-like receptor 4 (TLR4) and nucleolin (C23) during RSV infection were investigated.

                Methods
                We compared two experimental groups (infected and non-infected) and monitored the RSV viral titers in the culture supernatant by a viral plaque assay. We also inspected the morphology of the nucleus in infected N2a cells. We measured the level of RSV F protein and studied its co-localization with TLR4 and nucleolin using immunofluorescence assays and laser confocal microscopy. The potential interaction of RSV F protein with TLR4 and nucleolin was examined by coimmunoprecipitation. The expression changes of TLR4, nucleolin, TLR3 and TLR7 proteins in N2a cells and IL-6 and TNF-α in the culture supernatant were investigated by Western Blot analysis and ELISA assay. Changes in neuronal cell apoptosis status was examined by flow cytometry.

                Results
                The results demonstrated prolific RSV infection of N2a cells, which triggered a decrease of NeuN protein expression, coinciding with an increase of nuclear lesions, F protein expression, RSV viral titers, and late apoptotic levels of N2a cells. RSV infection induced co-localization of RSV F protein with TLR4 and nucleolin, which could potentially lead to a direct interaction. Furthermore, it was found that TLR4 and nucleolin levels increased early after infection and decreased subsequently, whereas TLR3 and TLR7 expression increased throughout RSV infection.

                Conclusion
                The RSV Long strain can prolifically infect N2a neuronal cells, modulating the expression of TLR4 and nucleolin, as well as TLR3, TLR7 and their downstream inflammatory factors, and inducing the co-localization of the RSV F protein with TLR4 and nucleolin.
On combinatorial problem concerning partitions of a box into boxes
Creators: name: Tyszka, Apoloniusz
Publisher: name: arXiv
Year: 2006
Subjects: subject: Metric Geometry (math.MG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C22, 05B45

description: We consider partitions of n-dimensional boxes in R^n, n>1, into a finite number of boxes with pairwise disjoint interiors. We study sets X \subseteq (0,\infty) with the Property (W_n): for every n-dimensional box P and every partition of P, if each constituent box has one side with the length belonging to X, then the length of one side of P belongs to X. We prove that the set X \subseteq (0,\infty) has Property (W_n) if and only if X is closed with respect to the operations: x+y and x+y+z-2min(x,y,z).
description: 3 pages, LaTeX2e, added the address http://www.cyf-kr.edu.pl/~rttyszka/jnatgeom1994.doc to item 4 of the References
Brane webs and 1/4-BPS geometries
Creators: name: Lunin, Oleg
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss brane webs preserving eight supercharges and derive geometries produced by them. Consistency conditions of supergravity are shown to impose certain requirements on the locations of the sources, and these restrictions are found to be in a perfect agreement with results of the probe analysis. In particular, solutions of IIB SUGRA describing (p,q) stings are inconsistent, unless the web consists of straight line segments whose orientation is correlated with charges of the string. The geometries produced by membranes and D3 branes are only consistent if brane profiles are holomorphic. Using perturbation theory, we show that a unique gravity solution exists for any allowed distribution of sources. We also revisit 1/4-BPS geometries with AdS_p x S^q asymptotics and derive the boundary conditions leading to regular geometries. All degenerate limits of regular solutions are shown to agree with expectations from the brane probe analysis.
description: 97 pages, added refs
Thermomechanical Modeling of Microstructure Evolution Caused by Strain-Induced Crystallization
Creators: name: Aygün, Serhat
name: Klinge, Sandra
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The present contribution deals with the thermomechanical modeling of the strain-induced crystallization in unfilled polymers. This phenomenon significantly influences mechanical and thermal properties of polymers and has to be taken into consideration when planning manufacturing processes as well as applications of the final product. In order to simultaneously capture both kinds of effects, the model proposed starts by introducing a triple decomposition of the deformation gradient and furthermore uses thermodynamic framework for material modeling based on the Coleman--Noll procedure and minimum principle of the dissipation potential, which requires suitable assumptions for the Helmholtz free energy and the dissipation potential. The chosen setup yields evolution equations which are able to simulate the formation and the degradation of crystalline regions accompanied by the temperature change during a cyclic tensile test. The boundary value problem corresponding to the described process includes the balance of linear momentum and balance of energy and serves as a basis for the numerical implementation within an FEM code. The~paper closes with the numerical examples showing the microstructure evolution and temperature distribution for different material samples.
Duality, the Semi-Circle Law and Quantum Hall Bilayers
Creators: name: Burgess, C. P.
name: Dolan, B. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: There is considerable experimental evidence for the existence in Quantum Hall systems of an approximate emergent discrete symmetry, $Γ_0(2) \subset SL(2,Z)$. The evidence consists of the robustness of the tests of a suite a predictions concerning the transitions between the phases of the system as magnetic fields and temperatures are varied, which follow from the existence of the symmetry alone. These include the universality of and quantum numbers of the fixed points which occur in these transitions; selection rules governing which phases may be related by transitions; and the semi-circular trajectories in the Ohmic-Hall conductivity plane which are followed during the transitions. We explore the implications of this symmetry for Quantum Hall systems involving {\it two} charge-carrying fluids, and so obtain predictions both for bilayer systems and for single-layer systems for which the Landau levels have a spin degeneracy. We obtain similarly striking predictions which include the novel new phases which are seen in these systems, as well as a prediction for semicircle trajectories which are traversed by specific combinations of the bilayer conductivities as magnetic fields are varied at low temperatures.
description: 12 pages, 8 figures; discussion of magnetic field dependence modified and figures and references updated in v2
Assessing the projection correction of Coronal Mass Ejection speeds on Time-of-Arrival prediction performance using the Effective Acceleration Model
Creators: name: Paouris, Evangelos
name: Vourlidas, Angelos
name: Papaioannou, Athanasios
name: Anastasiadis, Anastasios
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: White light images of Coronal Mass Ejections (CMEs) are projections on the plane-of-sky (POS). As a result, CME kinematics are subject to projection effects. The error in the true (deprojected) speed of CMEs is one of the main causes of uncertainty to Space Weather forecasts, since all estimates of the CME Time-of-Arrival (ToA) at a certain location within the heliosphere require, as input, the CME speed. We use single viewpoint observations for 1037 flare-CME events between 1996-2017 and propose a new approach for the correction of the CME speed assuming radial propagation from the flare site. Our method is uniquely capable to produce physically reasonable deprojected speeds across the full range of source longitudes. We bound the uncertainty in the deprojected speed estimates via limits in the true angular width of a CME based on multiview-point observations. Our corrections range up to 1.37-2.86 for CMEs originating from the center of the disk. On average, the deprojected speeds are 12.8% greater than their POS speeds. For slow CMEs (VPOS < 400 km/s) the full ice-cream cone model performs better while for fast and very fast CMEs (VPOS > 700 km/s) the shallow ice-cream model gives much better results. CMEs with 691-878 km/s POS speeds have a minimum ToA mean absolute error (MAE) of 11.6 hours. This method, is robust, easy to use, and has immediate applicability to Space Weather forecasting applications. Moreover, regarding the speed of CMEs, our work suggests that single viewpoint observations are generally reliable.
description: Paper accepted by Space Weather journal