cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Asymmetric Flexural-gravity Lumps in Nonuniform Media
Creators: name: Liang, Yong
name: Alam, Mohammad-Reza
Publisher: name: arXiv
Year: 2014
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Here we show that asymmetric fully-localized flexural-gravity lumps can propagate on the surface of an inviscid and irrotational fluid covered by a variable-thickness elastic material, provided that the thickness varies only in one direction and has a local minimum. We derive and present equations governing the evolution of the envelope of flexural-gravity wave packets allowing the flexing material to have small variations in the transverse (to propagation) direction. We show that the governing equation belongs to the general family of Davey-Stewartson equations, but with an extra term in the surface evolution equation that accounts for the variable thickness of the elastic cover. We then use an iterative Newton-Raphson scheme, with a numerical continuation procedure via Lagrange interpolation, in a search to find fully-localized solutions of this system of equations. We show that if the elastic sheet thickness has (at least) a local minimum, flexural-gravity lumps can propagate near the minimum thickness, and in general have an asymmetric bell-shape in the transverse to the propagation direction. In applied physics, flexural-gravity waves describe for instance propagation of waves over the ice-covered bodies of water. Ice is seldom uniform, nor is the seafloor, and in fact near the boundaries (ice-edges, shorelines) they typically vary only in one direction (toward to edge), and are uniform in the transverse direction. This research suggests that fully localized waves are not restricted to constant ice-thickness/water-depth areas and can exist under much broader conditions. Presented results may have implications in experimental generation and observation of flexural-gravity (as well as capillary-gravity) lumps.
Worst-case Throughput Analysis for Parametric Rate and Parametric Actor Execution Time Scenario-Aware Dataflow Graphs
Creators: name: Skelin, Mladen
name: Geilen, Marc
name: Catthoor, Francky
name: Hendseth, Sverre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Scenario-aware dataflow (SADF) is a prominent tool for modeling and analysis of dynamic embedded dataflow applications. In SADF the application is represented as a finite collection of synchronous dataflow (SDF) graphs, each of which represents one possible application behaviour or scenario. A finite state machine (FSM) specifies the possible orders of scenario occurrences. The SADF model renders the tightest possible performance guarantees, but is limited by its finiteness. This means that from a practical point of view, it can only handle dynamic dataflow applications that are characterized by a reasonably sized set of possible behaviours or scenarios. In this paper we remove this limitation for a class of SADF graphs by means of SADF model parametrization in terms of graph port rates and actor execution times. First, we formally define the semantics of the model relevant for throughput analysis based on (max,+) linear system theory and (max,+) automata. Second, by generalizing some of the existing results, we give the algorithms for worst-case throughput analysis of parametric rate and parametric actor execution time acyclic SADF graphs with a fully connected, possibly infinite state transition system. Third, we demonstrate our approach on a few realistic applications from digital signal processing (DSP) domain mapped onto an embedded multi-processor architecture.
description: In Proceedings SynCoP 2014, arXiv:1403.7841
Is the use of management accounting in startups a paradox? - A systematic literature review of how static management accounting practices can support dynamic startups
Creators: name: Boll, Nico
Publisher: name: JUNIOR MANAGEMENT SCIENCE
Year: 2018

description: This paper uses a systematic literature review to study the antecedents and consequences of management accounting (MA) in startup companies. Most literature focuses on large enterprises because it has generally thought that the adoption of MA is counterproductive in small firms. However, some authors state the contrary as to why we examine the empirical literature on this topic to create a wider base of knowledge. Our results indicate that the entrepreneur’s personal, professional and the firm’s characteristics trigger the timing of adoption of MA and thereupon show beneficial implications to a startup. Besides the positive impact of venture survival, startups that used management accounting practices such as budgeting, financial planning and cost control achieved higher performance in terms of growth.


Keywords: Management accounting, Systematic literature review, Startups, Entrepreneurship
description: JUNIOR MANAGEMENT SCIENCE, Bd. 3 Nr. 4 (2018)
РАЗВИТИЕ МУЗЫКАЛЬНОЙ КУЛЬТУРЫ У ПОДРОСТКОВ КЛАССА ФОРТЕПИАНО СРЕДСТВАМИ ОНЛАЙН-РЕСУРСА
Creators: name: Сообщество рецензентов Международного научно-исследовательского журнала
Publisher: name: ООО Цифра
Year: 2024
Subjects: online resource
music culture
student
interest
piano
онлайн-ресурс
музыкальная культура
учащийся
интерес
фортепиано

description: Международный научно-исследовательский журнал, Выпуск 9 (147) 2024
Topologically Robust Transport of Photons in a Synthetic Gauge Field
Creators: name: Mittal, S.
name: Fan, J.
name: Faez, S.
name: Migdall, A.
name: Taylor, J. M.
name: Hafezi, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electronic transport in low dimensions through a disordered medium leads to localization. The addition of gauge fields to disordered media leads to fundamental changes in the transport properties. For example, chiral edge states can emerge in two-dimensional systems with a perpendicular magnetic field. Here, we implement a "synthetic'' gauge field for photons using silicon-on-insulator technology. By determining the distribution of transport properties, we confirm the localized transport in the bulk and the suppression of localization in edge states, using the "gold standard'' for localization studies. Our system provides a new platform to investigate transport properties in the presence of synthetic gauge fields, which is important both from the fundamental perspective of studying photonic transport and for applications in classical and quantum information processing.
description: 4.5 pages, 3 figures and supplementary material
Mobile Localization in Non-Line-of-Sight Using Constrained Square-Root Unscented Kalman Filter
Creators: name: Yousefi, Siamak
name: Chang, Xiao-Wen
name: Champagne, Benoit
Publisher: name: arXiv
Year: 2014
Subjects: subject: Applications (stat.AP)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Localization and tracking of a mobile node (MN) in non-line-of-sight (NLOS) scenarios, based on time of arrival (TOA) measurements, is considered in this work. To this end, we develop a constrained form of square root unscented Kalman filter (SRUKF), where the sigma points of the unscented transformation are projected onto the feasible region by solving constrained optimization problems. The feasible region is the intersection of several discs formed by the NLOS measurements. We show how we can reduce the size of the optimization problem and formulate it as a convex quadratically constrained quadratic program (QCQP), which depends on the Cholesky factor of the \textit{a posteriori} error covariance matrix of SRUKF. As a result of these modifications, the proposed constrained SRUKF (CSRUKF) is more efficient and has better numerical stability compared to the constrained UKF. Through simulations, we also show that the CSRUKF achieves a smaller localization error compared to other techniques and that its performance is robust under different NLOS conditions.
description: Under review by IEEE Trans. on Vehicular Technology
Additional file 3 of Prevalence of symptoms, ever having received a diagnosis and treatment of depression and anxiety, and associations with health service use amongst the general population in two Russian cities
Creators: name: Cook, Sarah
name: Kudryavtsev, Alexander V.
name: Bobrova, Natalia
name: Saburova, Lyudmila
name: Denisova, Diana
name: Malyutina, Sofia
name: Lewis, Glyn
name: Leon, David A.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 3: Supplementary Figure 3. Distribution of Number of visits to a doctor in the past 12 months.
Additional file 1 of Near-Infrared Light-Triggered Thermo-responsive Poly(N-Isopropylacrylamide)-Pyrrole Nanocomposites for Chemo-photothermal Cancer Therapy
Creators: name: Shin, Ha Hee
name: Choi, Hyung Woo
name: Lim, Jae Hyun
name: Kim, Ji Woon
name: Chung, Bong Geun
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: Additional file 1: Fig. S1. Size distribution of PNIPAM-AAc, PNIPAM-ppy, PNIPAM-ppy-FA, and Dox@PNIPAM-ppy-FA nanocomposites in an aqueous solution at room temperature. Fig. S2. (A) Cytotoxicity analysis of PNIPAM-ppy-FA nanocomposites against A549 lung cancer and MDA-MB-231 breast cancer cells. (B) Cytotoxicity analysis of PNIPAM-ppy-FA and Dox@PNIPAM-ppy-FA in A549 lung cancer cells without NIR laser irradiation. Fig. S3. Intracellular uptake images of folate receptor targeting of PNIPAM-ppy-FA and Dox@PNIPAM-ppy-FA to (A, B) A549 lung cancer cells and (C) MDA-MB-231 breast cancer cells treated with Dox@PNIPAM-ppy-FA. Green, red, and blue represent phalloidin-stained cytoplasm, Dox fluorescence and DAPI-stained cell nuclei, respectively. Scale bars are 50 μm.
МНОГОЛЕТНИЕ ИЗМЕНЕНИЯ ТЕМПЕРАТУРЫ И КОЛИЧЕСТВА АТМОСФЕРНЫХ ОСАДКОВ В ПОСЁЛКЕ КРАСНАЯ ПОЛЯНА
Creators: name: Клепиков, Олег
Publisher: name: ООО Цифра
Year: 2024
Subjects: climate
precipitation
temperature
dry periods
warming
климат
атмосферные осадки
температура
засушливые периоды
потепление

description: Международный научно-исследовательский журнал, Выпуск 9 (147) 2024
3D simulations of disc-winds extending radially self-similar MHD models
Creators: name: Stute, Matthias
name: Gracia, Jose
name: Vlahakis, Nektarios
name: Tsinganos, Kanaris
name: Mignone, Andrea
name: Massaglia, Silvano
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Disc-winds originating from the inner parts of accretion discs are considered as the basic component of magnetically collimated outflows. The only available analytical MHD solutions to describe disc-driven jets are those characterized by the symmetry of radial self-similarity. However, radially self-similar MHD jet models, in general, have three geometrical shortcomings, (i) a singularity at the jet axis, (ii) the necessary assumption of axisymmetry, and (iii) the non-existence of an intrinsic radial scale, i.e. the jets formally extend to radial infinity. Hence, numerical simulations are necessary to extend the analytical solutions towards the axis, by solving the full three-dimensional equations of MHD and impose a termination radius at finite radial distance. We focus here on studying the effects of relaxing the (ii) assumption of axisymmetry, i.e. of performing full 3D numerical simulations of a disc-wind crossing all magnetohydrodynamic critical surfaces. We compare the results of these runs with previous axisymmetric 2.5D simulations. The structure of the flow in all simulations shows strong similarities. The 3D runs reach a steady state and stay close to axisymmetry for most of the physical quantities, except for the poloidal magnetic field and the toroidal velocity which slightly deviate from axisymmetry. The latter quantities show signs of instabilities, which, however, are confined to the region inside the fast magnetosonic separatrix surface. The forces present in the flow, both of collimating and accelerating nature, are in good agreement in both the 2.5D and the 3D runs. We conclude that the analytical solution behaves well also after relaxing the basic assumption of axisymmetry.
description: 8 pages, 6 figures, accepted for publication in MNRAS
Finite-strain formulation and FE implementation of a constitutive model for powder compaction
Creators: name: Stupkiewicz, S.
name: Piccolroaz, A.
name: Bigoni, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A finite-strain formulation is developed, implemented and tested for a constitutive model capable of describing the transition from granular to fully dense state during cold forming of ceramic powder. This constitutive model (as well as many others employed for geomaterials) embodies a number of features, such as pressure-sensitive yielding, complex hardening rules and elastoplastic coupling, posing considerable problems in a finite-strain formulation and numerical implementation. A number of strategies are proposed to overcome the related problems, in particular, a neo-Hookean type of modification to the elastic potential and the adoption of the second Piola-Kirchhoff stress referred to the intermediate configuration to describe yielding. An incremental scheme compatible with the formulation for elastoplastic coupling at finite strain is also developed, and the corresponding constitutive update problem is solved by applying a return mapping algorithm.
description: 22 pages
УСПЕХИ ТЕХНОЛОГИЙ БОЛЬШИХ ДАННЫХ (BIG DATA) В ПРОФИЛАКТИКЕ И ЛЕЧЕНИИ НАРУШЕНИЙ РИТМА СЕРДЦА. АКТУАЛЬНЫЕ ПРОБЛЕМЫ И ПУТИ ИХ РЕШЕНИЯ
Creators: name: Сообщество рецензентов Международного научно-исследовательского журнала
Publisher: name: ООО Цифра
Year: 2024
Subjects: cardiac rhythm disorder
arrhythmia
big data
arrhythmia treatment
arrhythmia prevention
нарушение ритма сердца
аритмия
большие данные
лечение аритмии
профилактика аритмии

description: Международный научно-исследовательский журнал, Выпуск 9 (147) 2024
X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
Creators: name: Buchner, J.
name: Georgakakis, A.
name: Nandra, K.
name: Hsu, L.
name: Rangel, C.
name: Brightman, M.
name: Merloni, A.
name: Salvato, M.
name: Donley, J.
name: Kocevski, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: AGN are known to have complex X-ray spectra that depend on both the properties of the accreting SMBH (e.g. mass, accretion rate) and the distribution of obscuring material in its vicinity ("torus"). Often however, simple and even unphysical models are adopted to represent the X-ray spectra of AGN. In the case of blank field surveys in particular, this should have an impact on e.g. the determination of the AGN luminosity function, the inferred accretion history of the Universe and also on our understanding of the relation between AGN and their host galaxies. We develop a Bayesian framework for model comparison and parameter estimation of X-ray spectra. We take into account uncertainties associated with X-ray data and photometric redshifts. We also demonstrate how Bayesian model comparison can be used to select among ten different physically motivated X-ray spectral models the one that provides a better representation of the observations. Despite the use of low-count spectra, our methodology is able to draw strong inferences on the geometry of the torus. For a sample of 350 AGN in the 4 Ms Chandra Deep Field South field, our analysis identifies four components needed to represent the diversity of the observed X-ray spectra: (abridged). Simpler models are ruled out with decisive evidence in favour of a geometrically extended structure with significant Compton scattering. Regarding the geometry of the obscurer, there is strong evidence against both a completely closed or entirely open toroidal geometry, in favour of an intermediate case. The additional Compton reflection required by data over that predicted by toroidal geometry models, may be a sign of a density gradient in the torus or reflection off the accretion disk. Finally, we release a catalogue with estimated parameters such as the accretion luminosity in the 2-10 keV band and the column density, $N_{H}$, of the obscurer.
description: 28 pages, 18 figures, catalogue available from https://www.mpe.mpg.de/~jbuchner/agn_torus/analysis/cdfs4Ms_cat/, software available from https://github.com/JohannesBuchner/BXA
A Stellar Census of the Tucana-Horologium Moving Group
Creators: name: Kraus, Adam L.
name: Shkolnik, Evgenya L.
name: Allers, Katelyn N.
name: Liu, Michael C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the selection and spectroscopic confirmation of 129 new late-type (K3-M6) members of the Tuc-Hor moving group, a nearby (~40 pc), young (~40 Myr) population of comoving stars. We also report observations for 13/17 known Tuc-Hor members in this spectral type range, and that 62 additional candidates are likely to be unassociated field stars; the confirmation frequency for new candidates is therefore 129/191 = 67%. We have used RVs, Halpha emission, and Li6708 absorption to distinguish contaminants and bona fide members. Our expanded census of Tuc-Hor increases the known population by a factor of ~3 in total and by a factor of ~8 for members with SpT>K3, but even so, the K-M dwarf population of Tuc-Hor is still markedly incomplete. The spatial distribution of members appears to trace a 2D sheet, with a broad distribution in X and Y, but a very narrow distribution (+/-5 pc) in Z. The corresponding velocity distribution is very small, with a scatter of +/-1.1 km/s about the mean UVW velocity. We also show that the isochronal age (20--30 Myr) and the lithium depletion age (40 Myr) disagree, following a trend seen in other PMS populations. The Halpha emission follows a trend of increasing EW with later SpT, as seen for young clusters. We find that members have been depleted of lithium for spectral types of K7.0-M4.5. Finally, our purely kinematic and color-magnitude selection procedure allows us to test the efficiency and completeness for activity-based selection of young stars. We find that 60% of K-M dwarfs in Tuc-Hor do not have ROSAT counterparts and would be omitted in Xray selected samples. GALEX UV-selected samples using a previously suggested criterion for youth achieve completeness of 77% and purity of 78%. We suggest new selection criteria that yield >95% completeness for ~40 Myr populations.(Abridged)
description: Accepted to AJ; 28 pages, 12 figures, 5 tables in emulateapj format
Self-interacting dark matter cusps around massive black holes
Creators: name: Shapiro, Stuart L.
name: Paschalidis, Vasileios
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We adopt the conduction fluid approximation to model the steady-state distribution of matter around a massive black hole at the center of a weakly collisional cluster of particles. By "`weakly collisional" we mean a cluster in which the mean free time between particle collisions is much longer than the characteristic particle crossing (dynamical) time scale, but shorter than the cluster lifetime. When applied to a star cluster, we reproduce the familiar Bahcall-Wolf power-law cusp solution for the stars bound to the black hole. Here the star density scales with radius as $r^{-7/4}$ and the velocity dispersion as $r^{-1/2}$ throughout most of the gravitational well of the black hole. When applied to a relaxed, self-interacting dark matter (SIDM) halo with a velocity-dependent cross section $σ\sim v^{-a}$, the gas again forms a power-law cusp, but now the SIDM density scales as $r^{-β}$, where $β= (a+3)/4$, while its velocity dispersion again varies as $r^{-1/2}$. Results are obtained first in Newtonian theory and then in full general relativity. Although the conduction fluid model is a simplification, it provides a reasonable first approximation to the matter profiles and is much easier to implement than a full Fokker-Planck treatment or an $N$-body simulation of the Boltzmann equation with collisional perturbations.
description: 11 pages, 2 figures
Resonant Scattering of Surface Plasmon Polaritons by Dressed Quantum Dots
Creators: name: Huang, Danhong
name: Easter, Michelle
name: Gumbs, Godfrey
name: Maradudin, A. A.
name: Lin, Shawn-Yu
name: Cardimona, Dave
name: Zhang, Xiang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The resonant scattering of surface plasmon-polariton waves by embedded semiconductor quantum dots above the dielectric/metal interface is explored in the strong-coupling regime. In contrast to non-resonant scattering by a localized dielectric surface defect, a strong resonant peak in the scattering field spectrum is predicted and accompanied by two side valleys. The peak height depends nonlinearly on the amplitude of surface plasmon-polariton waves, reflecting the feedback dynamics from a photon-dressed electron-hole plasma inside the quantum dots. This unique behavior in the scattering field peak strength is correlated with the occurrence of a resonant dip in the absorption spectrum of surface plasmon-polariton waves due to interband photon-dressing effect. Our result on the scattering of surface plasmon-polariton waves may be experimentally observable and applied to spatially selective illumination and imaging of individual molecules.
description: 15 pages, 3 figures
Cellular buckling in stiffened plates
Creators: name: Wadee, M. Ahmer
name: Farsi, Maryam
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences
subject: 34B15, 37G10

description: An analytical model based on variational principles for a thin-walled stiffened plate subjected to axial compression is presented. A system of nonlinear differential and integral equations is derived and solved using numerical continuation. The results show that the system is susceptible to highly unstable local--global mode interaction after an initial instability is triggered. Moreover, snap-backs in the response showing sequential destabilization and restabilization, known as cellular buckling or snaking, arise. The analytical model is compared to static finite element models for joint conditions between the stiffener and the main plate that have significant rotational restraint. However, it is known from previous studies that the behaviour, where the same joint is insignificantly restrained rotationally, is captured better by an analytical approach than by standard finite element methods; the latter being unable to capture cellular buckling behaviour even though the phenomenon is clearly observed in laboratory experiments.
description: 22 pages, 9 figures, 1 table, accepted for publication. Proceedings of the Royal Society A, 2014
ИСПОВЕДЬ ЭСКИ́ И СУД КОСТА́: К ПОЭМЕ К.Л. ХЕТАГУРОВА «ПЕРЕД СУДОМ»
Creators: name: Лебединская, Виктория
Publisher: name: ООО Цифра
Year: 2024
Subjects: Ossetian Russian-language literature
poem
romanticism
bandit
confession
plot
осетинская русскоязычная литература
поэма
романтизм
разбойник
исповедь
сюжет

description: Международный научно-исследовательский журнал, Выпуск 9 (147) 2024
Roaming dynamics in ion-molecule reactions: phase space reaction pathways and geometrical interpretation
Creators: name: Mauguière, F. A. L.
name: Collins, P.
name: Ezra, G. S.
name: Farantos, S. C.
name: Wiggins, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A model Hamiltonian for the reaction CH$_4^+ \rightarrow$ CH$_3^+$ + H, parametrized to exhibit either early or late inner transition states, is employed to investigate the dynamical characteristics of the roaming mechanism. Tight/loose transition states and conventional/roaming reaction pathways are identified in terms of time-invariant objects in phase space. These are dividing surfaces associated with normally hyperbolic invariant manifolds (NHIMs). For systems with two degrees of freedom NHIMS are unstable periodic orbits which, in conjunction with their stable and unstable manifolds, unambiguously define the (locally) non-recrossing dividing surfaces assumed in statistical theories of reaction rates. By constructing periodic orbit continuation/bifurcation diagrams for two values of the potential function parameter corresponding to late and early transition states, respectively, and using the total energy as another parameter, we dynamically assign different regions of phase space to reactants and products as well as to conventional and roaming reaction pathways. The classical dynamics of the system are investigated by uniformly sampling trajectory initial conditions on the dividing surfaces. Trajectories are classified into four different categories: direct reactive and non reactive trajectories,which lead to the formation of molecular and radical products respectively, and roaming reactive and non reactive orbiting trajectories, which represent alternative pathways to form molecular and radical products. By analysing gap time distributions at several energies we demonstrate that the phase space structure of the roaming region, which is strongly influenced by non-linear resonances between the two degrees of freedom, results in nonexponential (nonstatistical) decay.
description: 44 pages, 14 figures
Spectrum multiplexing and coherent-state decomposition in Fourier ptychographic imaging
Creators: name: Dong, Siyuan
name: Shiradkar, Radhika
name: Nanda, Pariksheet
name: Zheng, Guoan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Information multiplexing is important for biomedical imaging and chemical sensing. In this paper, we report a microscopy imaging technique, termed state-multiplexed Fourier ptychography (FP), for information multiplexing and coherent-state decomposition. Similar to a typical Fourier ptychographic setting, we use an array of light sources to illuminate the sample from different incident angles and acquire corresponding low-resolution images using a monochromatic camera. In the reported technique, however, multiple light sources are lit up simultaneously for information multiplexing, and the acquired images thus represent incoherent summations of the sample transmission profiles corresponding to different coherent states. We show that, by using the state-multiplexed FP recovery routine, we can decompose the incoherent mixture of the FP acquisitions to recover a high-resolution sample image. We also show that, color-multiplexed imaging can be performed by simultaneously turning on R/G/B LEDs for data acquisition. The reported technique may provide a solution for handling the partially coherent effect of light sources used in Fourier ptychographic imaging platforms. It can also be used to replace spectral filter, gratings or other optical components for spectral multiplexing and demultiplexing. With the availability of cost-effective broadband LEDs, the reported technique may open up exciting opportunities for computational multispectral imaging.
description: 10 pages, 7 figures
title: Наследственная тубулопатия: механизмы формирования патологии, клиническая и дифференциально-диагностическая значимость признаков на основании представленного клинического случая
title: Inherited Tubulopathy: Mechanisms of Pathology Formation, Clinical and Differential Diagnostic Significance of Signs Based on the Presented Clinical Case
Creators: name: Верижникова, Людмила Николаевна
name: Громова, Галина Григорьевна
Publisher: name: Издательский центр СурГУ
Year: 2020

description: Цель – проанализировать механизмы формирования, сложность диагностики и особенности течения наследственной тубулопатии как редко встречаемой патологии почек и определить клиническую и дифференциально-диагностическую значимость ее признаков на примере клинического случая. Материал и методы. Проведен анализ ведения случая наследственной тубулопатии – патологии почек (болезни Дента) – с 14-летним анамнезом на момент диагностики и трехлетним катамнезом ее течения у пациента. Результаты. Описанный случай болезни Дента относится к наследственным и/или врожденным нефропатиям и имеет гетерогенную молекулярно-генетическую основу развития. Клинические проявления болезни скудные, что затрудняет диагностику и своевременное лечение с позиции механизмов формирования патологии. Данное заболевание проявляется полиморфизмом лабораторных изменений в моче и крови, ранним развитием хронической болезни почек. Для верификации наследственной нефропатии необходимо генетическое типирование патогномоничных генов.
description: The aim of the study is to analyze the mechanisms of formation, the complexity of diagnostics and the course of inherited tubulopathy as a rare pathology of the kidneys and to determine the clinical and differential diagnostic significance of its signs on the example of a clinical case. Material and methods. An analysis of case management for inherited tubulopathy is made: pathology of the kidneys (Dent’s disease), with a 14-year-history at the time of diagnostics and a 3-year-follow-up of its course in the patient. Results. The described case of Dent’s disease refers to inherited and/or congenital nephropathies and has a heterogeneous molecular genetic basis for development. The clinical manifestations of the disease are scarce, which complicates the diagnostics and timely treatment from the perspective of the mechanisms for pathology formation. This disease is manifested by polymorphism of laboratory changes in urine and blood and early development of chronic kidney disease. To verify inherited nephropathy, genetic typing of pathognomonic genes is necessary.
Computational Methods to Improve Clinical Decision Science Related to Pulmonary Arterial Hypertension
Creators: name: Scott, Jacqueline
Publisher: name: Carnegie Mellon University
Year: 2022
Subjects: subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering
subject: 10402 Biostatistics
subject: FOS: Mathematics
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences

description: Pulmonary arterial hypertension (PAH) remains a deadly and rare disorder of the pulmonary vasculature. A combination of vasoconstriction and cellular proliferation of the pulmonary arterial lumen results in increased mean pulmonary arterial pressure, straining the right heart and eventually causing heart failure. Despite the development of a wide range of pharmaceutical treatments for PAH, median survival of this condition remains a paltry seven years. Treatment guidance for PAH depends significantly on a clinician’s ability to assess their patient’s risk of mortality, but all risk assessment methods remain limited in their accuracy and usability. This dissertation examines the ways in which risk assessment can be used to improve clinical decision science related to pulmonary arterial hypertension, then explores new modeling methodologies to improve upon current risk assessment standards. Chapter 1 discusses the background of challenges related to clinical decision science, specific to pulmonary arterial hypertension. Chapter 2 examines how risk assessment tools can be used to improve the efficiency of clinical trials for pharmaceutical treatments of PAH. Chapter 3 explores how improved risk stratification can reveal differences in treatment response between low and high-risk patients. Chapter 4 examines how novel machine learning methodologies can be employed to improve PAH risk assessment tools. Finally, Chapter 5 studies the potential use of a novel physiological model of right ventricular energetics as a means of improving clinical understanding of right heart failure.
Оценка возможности объективного определения глубины повреждения кожных покровов, толщины кожных пластов и их гистологического соответствия с помощью ОКТ
Creators: name: Рыльков, Михаил
Publisher: name: ООО Цифра
Year: 2024
Subjects: intravital visualization of skin structures
OCT
dermatomy
skin grafting
thickness of skin graft
determination of the depth of skin damage
прижизненная визуализация структур кожи
оптическая когерентная томография
ОКТ
дерматомия
кожная пластика
толщина кожного трансплантата
определение глубины повреждения кожи

description: Международный научно-исследовательский журнал, Выпуск 9 (147) 2024
Stochastic resonance in the two-dimensional q-state clock models
Creators: name: Park, Hye Jin
name: Baek, Seung Ki
name: Kim, Beom Jun
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We numerically study stochastic resonance in the two-dimensional q-state clock models from q = 2 to 7 under a weak oscillating magnetic field. As in the mean-field case, we observe double resonance peaks, but the detailed response strongly depends on the direction of the field modulation for q >= 5 where the quasiliquid phase emerges. We explain this behavior in terms of free-energy landscapes on the two-dimensional magnetization plane.
A new photopolymer based VPHG for astronomy: The case of SN 2013fj
Creators: name: Zanutta, A.
name: Landoni, M.
name: Bianco, A.
name: Tomasella, L.
name: Benetti, S.
name: Giro, E
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The spectroscopic studies of near infrared emission arising from supernovae allow to derive crucial quantities that could better characterise physical conditions of the expanding gas, such as the CaII IR HVF spectral feature. For this reason is mandatory to have Diffractive Optical Elements (DOEs) with a spectral coverage in the range 8000 - 10000 Angstroms (for low z sources) combined with a reasonable Signal to Noise Ratio (S/N) and medium-low resolution. In order to cope with all of those requirements we developed a Volume Phase Holographic Grating (VPHG) based on an innovative photosensitive material, developed by Bayer MaterialScience. We demonstrated the capabilities of this new DOE through observation of SN 2013fj as case study at Asiago Copernico Telescope where AFOSC spectrograph is available.
description: Accepted for publication in PASP
Enabling Collaborative Use of Data for Mobile Devices under Physical and Privacy Constraints
Creators: name: Ruan, Yichen
Publisher: name: Carnegie Mellon University
Year: 2022
Subjects: Computer Engineering

description: In the mobile Internet era, data has become the essential ingredient for numerous mobile services such as video streaming, GPS navigation, and on-device intelligence. Nevertheless, the resource-restricted nature of mobile devices often obstructs them from collecting and processing all the data as needed individually. Enabling the collaborative use of data among mobile devices hence greatly extends the potential reach of mobile users for external datasets and computation resources, allowing both public and private data to be more efficiently delivered to and processed by various mobile applications. Implementing this collaboration in the real-world however faces both the physical capacity limits and the privacy protection requirements. Fortunately, the state-of-the-art edge computing framework empowered by 5G-based heterogeneous networks and the recent advances in privacy-preserving federated learning algorithms provide powerful tools based on which innovative systems and algorithms can be developed to address these constraints. This thesis aims to enable the collaborative use of data for mobile devices through five approaches that fall into two categories: the direct sharing of public or desensitized data, and variants of privacy-preserving federated learning algorithms that are optimized for the mobile environment. For the first category, this thesis proposes to empower the direct data sharing by 1) temporal- and spatial-adaptive mobile caching and 2) topology-aware device-to-device data offloading. For the second category, this thesis improves the existing federated learning implementations by 3) the optimal client recruitment that balances both accuracy and efficiency metrics, 4) innovative extensions to federated training algorithms that incorporate flexible device participation patterns, and 5) soft clustered federated learning that also learns personalized models for clients that collect samples from multiple data distributions.
Restricted Kac modules of Hamiltonian Lie superalgebras of odd type
Creators: name: Yuan, Jixia
name: Liu, Wende
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B10, 17B50, 17B10, 17B50, 17B66

description: This paper aims to describe the restricted Kac modules of restricted Hamiltonian Lie superalgebras of odd type over an algebraically closed field of characteristic $p>3$. In particular, a sufficient and necessary condition for the restricted Kac modules to be irreducible is given in terms of typical weights.
description: 13 pages
Влияние антигенов плода и плаценты на состояние селезенки самок белых беспородных крыс во время беременности
Creators: name: Плохих, Дмитрий
Publisher: name: ООО Цифра
Year: 2024
Subjects: pregnancy
fetal antigens
placental antigens
maternal immunity
беременность
антигены плода
антигены плаценты
иммунитет матери

description: Международный научно-исследовательский журнал, Выпуск 9 (147) 2024
title: Evaluation of the SUEWS model using Eddy Covariance data for the estimation of urban energy balance in the center of Herakleion
title: Βαθμονόμηση με τη χρήση δεδομένων από σταθμό eddy covariance και χρήση μοντέλου SWEUS για τον υπολογισμό του ισοζυγίου ενέργειας στο κέντρο του Ηρακλείου
Creators: name: Παναγιωτακης Εμμανουηλ
Publisher: name: Technical University of Crete
Year: 2020

description: Present paper aims to study the impact of Nature Based Solutions (NBS) on the urban environment. The Surface Urban Energy and Water balance Scheme (SUEWS) is used to quantify the impact of NBS in the city of Heraklion, Crete, Greece, a densely built urban area. Local meteorological data and data from an Eddy Covariance flux tower installed in the city center are used for the model simulation and evaluation.  Five different scenarios are tested by replacing the city's roofs and pavements with green infrastructure, i.e. trees and grass, and water bodies. NBS impact evaluation is based on the changes of air temperature above 2m from the ground, relative humidity and energy fluxes. A decrease of the air temperature is revealed with the highest reduction (2.3%) occurring when the pavements are replaced with grass for all scenarios. The reduction of the air temperature is followed by a decrease in turbulent sensible heat flux. For almost all cases, an increase of the relative humidity is noticed, accompanied by a considerable increase of the turbulent latent heat flux. Therefore, NBS in cities change the energy balance significantly and modify the urban environment for the citizens' benefit.
A COMPARATIVE STUDY OF CORNEAL TOPOGRAPHICAL AND CENTRAL CORNEAL THICKNESS CHANGES IN DIABETICS AND NON DIABETICS BEFORE AND AFTER PHACOEMULSIFICATION.
Creators: name: VIJAYA, MALLAREDDY NAGA
name: DR SACHIN DAIGAVANE
Publisher: name: Zenodo
Year: 2023
Subjects: Diabetes, Corneal topography, Corneal curvature, Central corneal thickness, Phacoemulsification.

description: SPIRIT CHECKLIST of study on A COMPARATIVE STUDY OF CORNEAL TOPOGRAPHICAL AND CENTRAL CORNEAL THICKNESS CHANGES IN DIABETICS AND NON DIABETICS BEFORE AND AFTER PHACOEMULSIFICATION.
Orbital Motion in Pre-Main Sequence Binaries
Creators: name: Schaefer, G. H.
name: Prato, L.
name: Simon, M.
name: Patience, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present results from our ongoing program to map the visual orbits of pre-main sequence binaries in the Taurus star forming region using adaptive optics imaging at the Keck Observatory. We combine our results with measurements reported in the literature to analyze the orbital motion for each binary. We present preliminary orbits for DF Tau, T Tau S, ZZ Tau, and the Pleiades binary HBC 351. Seven additional binaries show curvature in their relative motion. Currently, we can place lower limits on the orbital periods for these systems; full solutions will be possible with more orbital coverage. Five other binaries show motion that is indistinguishable from linear motion. We suspect that these systems are bound and might show curvature with additional measurements in the future. The observations reported herein lay critical groundwork toward the goal of measuring precise masses for low-mass pre-main sequence stars.
description: 60 pages, 6 tables, 23 figures; Accepted for publication in AJ
On the necessity of some constraint qualification conditions in convex programming
Creators: name: Tiba, Dan
name: Zălinescu, Constantin
Publisher: name: Weierstrass Institute
Year: 2002
Subjects: subject: convex function
subject: constraint qualification
subject: Lagrange multiplier
subject: metric regularity
subject: normal cone
subject: 49K27
subject: 90C25

description: In this paper, we realize a study of various constraint qualification conditions for the existence of Lagrange multipliers for convex minimization problems in general normed vector spaces, it is based on a new formula for the normal cone to the constraint set, on local metric regularity and a metric regularity property on bounded subsets. As a by-product, we obtain a characterization of the metric regularity of a finite family of closed convex sets.
Symmetry-projected Wave Functions in Quantum Monte Carlo Calculations
Creators: name: Shi, Hao
name: Jiménez-Hoyos, Carlos A.
name: Rodríguez-Guzmán, R.
name: Scuseria, Gustavo E.
name: Zhang, Shiwei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We consider symmetry-projected Hartree--Fock trial wave functions in constrained-path Monte Carlo (CPMC) calculations. Previous CPMC calculations have mostly employed Hartree--Fock (HF) trial wave functions, restricted or unrestricted. The symmetry-projected HF approach results in a hierarchy of wave functions with increasing quality: the more symmetries that are broken and restored in a self-consistent manner, the higher the quality of the trial wave function. This hierarchy is approximately maintained in CPMC calculations: the accuracy in the energy increases and the statistical variance decreases when further symmetries are broken and restored. Significant improvement is achieved in CPMC with the best symmetry-projected trial wave functions over those from simple HF. We analyze and quantify the behavior using the two-dimensional repulsive Hubbard model as an example. In the sign-problem-free region, where CPMC can be made exact but a constraint is deliberately imposed here, spin-projected wave functions remove the constraint bias. Away from half-filling, spatial symmetry restoration in addition to that of the spin lead to highly accurate results from CPMC. Since the computational cost of symmetry-projected HF trial wave functions in CPMC can be made to scale algebraically with system size, this provides a potentially general approach for accurate calculations in many-fermion systems.
description: 9 pages, 5 figures
Untitled Item
Creators: name: Hutchinson, John
name: Madelaire, Carla
name: Rummel, Andrea
Publisher: name: figshare
Year: 2020
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Tips for giving a virtual 2021 SICB talk, from SPDAC
Wide-field, high-resolution Fourier ptychographic microscopy
Creators: name: Zheng, Guoan
name: Horstmeyer, Roarke
name: Yang, Changhuei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this article, we report an imaging method, termed Fourier ptychographic microscopy (FPM), which iteratively stitches together a number of variably illuminated, low-resolution intensity images in Fourier space to produce a wide-field, high-resolution complex sample image. By adopting a wavefront correction strategy, the FPM method can also correct for aberrations and digitally extend a microscope's depth-of-focus beyond the physical limitations of its optics. As a demonstration, we built a microscope prototype with a resolution of 0.78 um, a field-of-view of ~120 mm2, and a resolution-invariant depth-of-focus of 0.3 mm (characterized at 632 nm). Gigapixel colour images of histology slides verify FPM's successful operation. The reported imaging procedure transforms the general challenge of high-throughput, high-resolution microscopy from one that is coupled to the physical limitations of the system's optics to one that is solvable through computation.
description: 11 pages, 4 figures. Nature Photonics,2013
Leverage effect in energy futures
Creators: name: Kristoufek, Ladislav
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: We propose a comprehensive treatment of the leverage effect, i.e. the relationship between returns and volatility of a specific asset, focusing on energy commodities futures, namely Brent and WTI crude oils, natural gas and heating oil. After estimating the volatility process without assuming any specific form of its behavior, we find the volatility to be long-term dependent with the Hurst exponent on a verge of stationarity and non-stationarity. Bypassing this using by using the detrended cross-correlation and the detrending moving-average cross-correlation coefficients, we find the standard leverage effect for both crude oil. For heating oil, the effect is not statistically significant, and for natural gas, we find the inverse leverage effect. Finally, we also show that none of the effects between returns and volatility is detected as the long-term cross-correlated one. These findings can be further utilized to enhance forecasting models and mainly in the risk management and portfolio diversification.
description: 19 pages, 2 figures, 5 tables