cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 1 of Cesarean delivery or induction of labor in pre-labor twin gestations: a secondary analysis of the twin birth study
Creators: name: C Dougan
name: L Gotha
name: N Melamed
name: A Aviram
name: EV Asztalos
name: S Anabusi
name: AR Willan
name: JFR Barrett
name: Mei-Dan, E
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1: Table S1. Neonatal outcomes in women whose indication for delivery was “gestational-age window”.
title: А2. Золотое кольцо. Русский язык для иностранцев. Базовый уровень (何淑梅 编译 金 环)
title: Учебник
titleType: Subtitle
Creators: name: Лёвина Г.М.
name:  Николенко Е.Ю.
Publisher: name: Ай Пи Эр Медиа
Year: 2019

description: Учебник позволяет быстро овладеть основами разговорной речи, вести диалог на русском языке, высказывать и обосновывать свою точку зрения по общекультурным вопросам на основе 1000 активных лексических единиц. Грамматический материал в объеме базового уровня (А2). Для усвоения материала учебника требуется 70–100 аудиторных часов + 70–100 часов самостоятельной работы . Учебник предназначен для подготовительных факультетов, курсов русского языка, индивидуального обучения. 本教材能使您快速掌握会话言语基础知识，用俄语对话，使用1000个积极词汇说出并论证自己的关于一般文化问题的观点。语法材料在基础等级范围之内。掌握本教材需要70–100个课时加上70–100个小时的自学。本教材适用于俄语预科系，俄语学习班，以及个人学习者。
description: The tutorial allows you to quickly master the basics of spoken English, dialogue in Russian, to Express and justify their point of view on cultural matters on the basis of 1000 active lexical units. Grammar in the amount of basic level (A2). For learning material of the textbook required classroom hours 70-100 + 70-100 hours of independent work . The tutorial is intended for preparatory faculty, Russian language courses, individual training. 本教材能使您快速掌握会话言语基础知识，用俄语对话，使用1000个积极词汇说出并论证自己的关于一般文化问题的观点。语法材料在基础等级范围之内。掌握本教材需要70–100个课时加上70–100个小时的自学。本教材适用于俄语预科系，俄语学习班，以及个人学习者。
Exploring the spatial, temporal, and vertical distribution of methane in Pluto's atmosphere
Creators: name: Lellouch, E.
name: de Bergh, C.
name: Sicardy, B.
name: Forget, F.
name: Vangvichith, M.
name: Käufl, H. -U.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: High-resolution spectra of Pluto in the 1.66 um region, recorded with the VLT/CRIRES instrument in 2008 (2 spectra) and 2012 (5 spectra), are analyzed to constrain the spatial and vertical distribution of methane in Pluto's atmosphere and to search for mid-term (4 year) variability. A sensitivity study to model assumptions (temperature structure, surface pressure, Pluto's radius) is performed. Results indicate that (i) no variation of the CH4 atmospheric content (column-density or mixing ratio) with Pluto rotational phase is present in excess of 20 % (ii) CH4 column densities show at most marginal variations between 2008 and 2012, with a best guess estimate of a ~20 % decrease over this time frame. As stellar occultations indicate that Pluto's surface pressure has continued to increase over this period, this implies a concomitant decrease of the methane mixing ratio (iii) the data do not show evidence for an altitude-varying methane distribution; in particular, they imply a roughly uniform mixing ratio in at least the first 22-27 km of the atmosphere, and high concentrations of low-temperature methane near the surface can be ruled out. Our results are also best consistent with a relatively large (> 1180 km) Pluto radius. Comparison with predictions from a recently developed global climate model GCM indicates that these features are best explained if the source of methane occurs in regional-scale CH4 ice deposits, including both low latitudes and high Northern latitudes, evidence for which is present from the rotational and secular evolution of the near-IR features due to CH4 ice. Our "best guess" predictions for the New Horizons encounter in 2015 are: a 1184 km radius, a 17 ubar surface pressure, and a 0.44 % CH4 mixing ratio with negligible longitudinal variations.
description: 21 pages, 6 figures
3-degenerate induced subgraph of a planar graph
Creators: name: Gu, Y.
name: Kierstead, H. A.
name: Oum, Sang-il
name: Qi, Hao
name: Zhu, Xuding
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A graph $G$ is $d$-degenerate if every non-null subgraph of $G$ has a vertex of degree at most $d$. We prove that every $n$-vertex planar graph has a $3$-degenerate induced subgraph of order at least $3n/4$.
description: 28 pages, 12 figures
Применение микроклонального размножения растений в условиях ЭкоКосмоДома
Creators: name: Заяц В.С.
name: Налетов И.В.
Publisher: name: Сборник материалов V международной научно-технической конференции «Безракетная индустриализация ближнего космоса: проблемы, идеи, проекты»
Year: 2022
Subjects: замкнутая экосистема
микроклональное размножение
растения in vitro
фитогормоны
ЭкоКосмоДом (ЭКД)

description: Описана возможность применения микроклонального размножения растений в условиях замкнутой экосистемы ЭкоКосмоДома (ЭКД). Представлен способ вегетативного размножения растительных культур in vitro, а также обозначены преимущества и недостатки такого подхода для замкнутых экосистем бесконечно долгого существования. Указаны необходимые составляющие для создания условий внедрения данной технологии в закрытом изолированном пространстве.
Magnetohydrodynamic Simulation of the X2.2 Solar Flare on 2011 February 15: I. Comparison with the Observations
Creators: name: Inoue, S.
name: Hayashi, K.
name: Magara, T.
name: Choe, G. S.
name: Park, Y. D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We performed a magnetohydrodynamic (MHD) simulation using a nonlinear force-free field (NLFFF) in solar active region 11158 to clarify the dynamics of an X2.2-class solar flare. We found that the NLFFF never shows the drastic dynamics seen in observations, i.e., it is in stable state against the perturbations. On the other hand, the MHD simulation shows that when the strongly twisted lines are formed at close to the neutral line, which are produced via tether-cutting reconnection in the twisted lines of the NLFFF, consequently they erupt away from the solar surface via the complicated reconnection. This result supports the argument that the strongly twisted lines formed in NLFFF via tether-cutting reconnection are responsible for breaking the force balance condition of the magnetic fields in the lower solar corona. In addition to this the dynamical evolution of these field lines reveals that at the initial stage the spatial pattern of the footpoints caused by the reconnection of the twisted lines appropriately maps the distribution of the observed two-ribbon flares. Interestingly, after the flare the reconnected field lines convert into the structure like the post flare loops, which is analogous to EUV image taken by SDO. Eventually, we found that the twisted lines exceed a critical height at which the flux tube becomes unstable to the torus instability. These results illustrate the reliability of our simulation and also provide an important relationship between flare-CME dynamics.
description: 29 pages, 11 figures, accepted for publication in The Astrophysical Journal
Применение электрогидравлического эффекта для обеззараживания сточных вод в условиях проживания людей в космосе
Creators: name: Юницкий А.Э.
name: Першай Н.С.
name: Буглак П.А.
name: Лобазова И.Е.
name: Арнаут С.А.
Publisher: name: Сборник материалов V международной научно-технической конференции «Безракетная индустриализация ближнего космоса: проблемы, идеи, проекты»
Year: 2022
Subjects: космическое индустриальное ожерелье «Орбита» (КИО «Орбита»)
обеззараживание воды
сточные воды
ЭкоКосмоДом (ЭКД)
электрогидравлический эффект
электрогидроудар
электрогидроударная установка

description: Проведён анализ существующих способов обеззараживания воды, указаны их достоинства и недостатки в разрезе возможности использования в космическом индустриальном ожерелье «Орбита» (КИО «Орбита»). Представлены результаты испытаний по обеззараживанию воды, контаминированной спорообразующими бактериями Bacillus subtilis, а также нативной озёрной воды на экспериментальной электрогидроударной установке UniThorr, разработанной ЗАО «Струнные технологии». Показана высокая эффективность применения электрогидравлического удара для обеззараживания, что позволит перейти на безреагентный метод и получить замкнутый цикл водопотребления в ЭкоКосмоДоме (ЭКД).
Exclusive $J/ψ$, $ψ(2s)$, and $e^{+}e^{-}$ pair production in Au$+$Au ultra-peripheral collisions at RHIC
Creators: name: STAR Collaboration
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Measurements of exclusive $J/ψ$, $ψ(2s)$, and electron-positron ($e^{+}e^{-}$) pair photoproduction in Au$+$Au ultra-peripheral collisions are reported by the STAR experiment at $\sqrt{s_{_\mathrm{NN}}}=200~\rm{GeV}$. We report several first measurements at the Relativistic Heavy-Ion Collider, which are i) $J/ψ$ photoproduction with large momentum transfer up to $2.2~\rm{(GeV/c)^{2}}$, ii) coherent $J/ψ$ photoproduction associated with neutron emissions from nuclear breakup, iii) the rapidity dependence of incoherent $J/ψ$ photoproduction, iv) the $ψ(2s)$ photoproduction cross section at mid-rapidity, and v) $e^{+}e^{-}$ pair photoproduction up to high invariant mass of 6 $\rm{GeV/c^2}$. For measurement ii), the coherent $J/ψ$ total cross section of $γ^{\ast} + \rm{Au} \rightarrow J/ψ+ \rm{Au}$ as a function of the center-of-mass energy $W_{\rm{γ* N}}$ has been obtained without photon energy ambiguities. The data are quantitatively compared with the Monte Carlo models STARlight, Sartre, BeAGLE, and theoretical calculations of gluon saturation with color glass condensate, nuclear shadowing with leading twist approximation, Quantum Electrodynamics, and the Next-to-Leading Order perturbative QCD. At the photon-nucleon center-of-mass energy of 25.0 GeV, the coherent and incoherent $J/ψ$ cross sections of Au nuclei are found to be $71\pm10\%$ and $36\pm7\%$, respectively, of that of free protons. These data provide an important experimental constraint for nuclear parton distribution functions and a unique opportunity to advance the understanding of the nuclear modification effect at the top RHIC energy.
description: Final published version. Corrected a figure with a wrong input file name
Принципы создания генетического банка живых организмов для длительного существования замкнутой экосистемы
Creators: name: Пятакова Т.И.
name: Налетов И.В.
Publisher: name: Сборник материалов V международной научно-технической конференции «Безракетная индустриализация ближнего космоса: проблемы, идеи, проекты»
Year: 2022
Subjects: генофонд
замкнутая экосистема
криоконсервация
лиофилизация
популяция
ЭкоКосмоДом (ЭКД)

description: Представлены принципы создания генетического банка живых организмов (микроорганизмы, растения, животные), особенности их существования в замкнутой экосистеме ЭкоКосмоДома (ЭКД). Рассмотрены теоретические аспекты, предложены возможные решения по поддержанию жизни популяции в условиях изолированного пространства.
Deformation Dynamics of Nanopores upon Water Imbibition
Creators: name: Sanchez, Juan
name: Dammann, Lars
name: Gallardo, Laura
name: Li, Zhuoqing
name: Fröba, Michael
name: Meissner, Robert
name: Stone, Howard A.
name: Huber, Patrick
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Capillarity-driven transport in nanoporous solids is widespread in nature and crucial for modern liquid-infused engineering materials. During imbibition, curved menisci driven by high negative Laplace pressures exert an enormous contractile load on the porous matrix. Due to the challenge of simultaneously monitoring imbibition and deformation with high spatial resolution, the resulting coupling of solid elasticity to liquid capillarity has remained largely unexplored. Here, we study water imbibition in mesoporous silica using optical imaging, gravimetry, and high-resolution dilatometry. In contrast to an expected Laplace pressure-induced contraction, we find a square-root-of-time expansion and an additional abrupt length increase when the menisci reach the top surface. The final expansion is absent when we stop the imbibition front inside the porous medium in a dynamic imbibition-evaporation equilibrium, as is typical for transpiration-driven hydraulic transport in plants, especially in trees. These peculiar deformation behaviors are validated by single-nanopore molecular dynamics simulations and described by a continuum model that highlights the importance of expansive surface stresses at the pore walls (Bangham effect) and the buildup or release of contractile Laplace pressures as menisci collectively advance, arrest, or disappear. Our model suggests that these observations apply to any imbibition process in nanopores, regardless of the liquid/solid combination, and that the Laplace contribution upon imbibition is precisely half that of vapor sorption, due to the linear pressure drop associated with viscous flow. Thus, simple deformation measurements can be used to quantify surface stresses and Laplace pressures or transport in a wide variety of natural and artificial porous media.
description: 11 pages, 4 figures. Supplementary information and 3 movies are stored as ancillary files
Improving the Performance of Digitized Counterdiabatic Quantum Optimization via Algorithm-Oriented Qubit Mapping
Creators: name: Ji, Yanjun
name: Koenig, Kathrin F.
name: Polian, Ilia
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper presents strategies to improve the performance of digitized counterdiabatic quantum optimization algorithms by cooptimizing gate sequences, algorithm parameters, and qubit mapping. Demonstrations on near-term quantum devices validate the effectiveness of these strategies, leveraging both algorithmic and hardware advantages. Our approach increases the approximation ratio by an average of 4.49$\times$ without error mitigation and 84.8% with error mitigation, while reducing CX gate count and circuit depth by 28.8% and 33.4%, respectively, compared to Qiskit and Tket. These findings provide valuable insights into the codesign of algorithm implementation, tailored to optimize qubit mapping and algorithm parameters, with broader implications for enhancing algorithm performance on near-term quantum devices.
A Comparison of Properties of Quasars with and without Rapid Broad Absorption Line Variability
Creators: name: Horiuchi, Takashi
name: Morokuma, Tomoki
name: Misawa, Toru
name: Hanayama, Hidekazu
name: Kawaguchi, Toshihiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the correlation between rest-frame UV flux variability of broad absorption line (BAL) quasars and their variability in BAL equivalent widths (EWs) in a various timescale from $<10$~days to a few years in the quasar rest-frame. We use the data sets of BAL EWs taken by the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project and photometric data taken by the intermediate Palomar Transient Factory (iPTF) in $g$ and $R$-bands and the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) in $grizy$ bands. Our results are summarized as below; (1) the distributions of flux variability versus BAL variability show weak, moderate, or a strong positive correlation, (2) there is no significant difference in flux variability amplitudes between BAL quasar with significant short timescale EW variability (called class S1) and without (class S2), (3) in all time scales considered in this paper, the class S1 quasars show systematically larger BAL variability amplitudes than those of the class S2 quasars, and (4) there are possible correlations between BAL variability and physical parameters of the quasars such as black hole masses (moderate positive), Eddington ratios, and accretion disk temperature (strong negative) in the class S2 quasars. These results indicate that the BAL variability requires changing in the ionizing continuum and an ancillary mechanism such as variability in X-ray shielding gas located at the innermost region of an accretion disk.
description: 22 pages
WASP-103b: a new planet at the edge of tidal disruption
Creators: name: Gillon, M.
name: Anderson, D. R.
name: Collier-Cameron, A.
name: Delrez, L.
name: Hellier, C.
name: Jehin, E.
name: Lendl, M.
name: Maxted, P. F. L.
name: Pepe, F.
name: Pollacco, D.
name: Queloz, D.
name: Segransan, D.
name: Smith, A. M. S.
name: Smalley, B.
name: Southworth, J.
name: Triaud, A. H. M. J.
name: Udry, S.
name: Van Grootel, V.
name: West, R. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the discovery of WASP-103b, a new ultra-short-period planet (P=22.2 hr) transiting a 12.1 V-magnitude F8-type main-sequence star (1.22+-0.04 Msun, 1.44-0.03+0.05 Rsun, Teff = 6110+-160 K). WASP-103b is significantly more massive (1.49+-0.09 Mjup) and larger (1.53-0.07+0.05 Rjup) than Jupiter. Its large size and extreme irradiation (around 9 10^9 erg/s/cm^2) make it an exquisite target for a thorough atmospheric characterization with existing facilities. Furthermore, its orbital distance is less than 20% larger than its Roche radius, meaning that it might be significantly distorted by tides and might experience mass loss through Roche-lobe overflow. It thus represents a new key object for understanding the last stage of the tidal evolution of hot Jupiters.
description: 5 pages, 4 figures. Accepted for publication as Letter in Astronomy and Astrophysics on 09/01/2014
From communication complexity to an entanglement spread area law in the ground state of gapped local Hamiltonians
Creators: name: Anshu, Anurag
name: Harrow, Aram W.
name: Soleimanifar, Mehdi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In this work, we make a connection between two seemingly different problems. The first problem involves characterizing the properties of entanglement in the ground state of gapped local Hamiltonians, which is a central topic in quantum many-body physics. The second problem is on the quantum communication complexity of testing bipartite states with EPR assistance, a well-known question in quantum information theory. We construct a communication protocol for testing (or measuring) the ground state and use its communication complexity to reveal a new structural property for the ground state entanglement. This property, known as the entanglement spread, roughly measures the ratio between the largest and the smallest Schmidt coefficients across a cut in the ground state. Our main result shows that gapped ground states possess limited entanglement spread across any cut, exhibiting an "area law" behavior. Our result quite generally applies to any interaction graph with an improved bound for the special case of lattices. This entanglement spread area law includes interaction graphs constructed in [Aharonov et al., FOCS'14] that violate a generalized area law for the entanglement entropy. Our construction also provides evidence for a conjecture in physics by Li and Haldane on the entanglement spectrum of lattice Hamiltonians [Li and Haldane, PRL'08]. On the technical side, we use recent advances in Hamiltonian simulation algorithms along with quantum phase estimation to give a new construction for an approximate ground space projector (AGSP) over arbitrary interaction graphs.
description: 29 pages, 1 figure
Avoided metallicity in a hole-doped Mott insulator on a triangular lattice
Creators: name: Yim, Chi Ming
name: Siemann, Gesa-R.
name: Stavrić, Srdjan
name: Khim, Seunghyun
name: Benedičič, Izidor
name: Murgatroyd, Philip A. E.
name: Antonelli, Tommaso
name: Watson, Matthew D.
name: Mackenzie, Andrew P.
name: Picozzi, Silvia
name: King, Phil D. C.
name: Wahl, Peter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Doping of a Mott insulator gives rise to a wide variety of exotic emergent states, from high-temperature superconductivity to charge, spin, and orbital orders. The physics underpinning their evolution is, however, poorly understood. A major challenge is the chemical complexity associated with traditional routes to doping. Here, we study the Mott insulating CrO$_2$ layer of the delafossite PdCrO$_2$, where an intrinsic polar catastrophe provides a clean route to doping of the surface. From scanning tunnelling microscopy and angle-resolved photoemission, we find that the surface stays insulating accompanied by a short-range ordered state. From density functional theory, we demonstrate how the formation of charge disproportionation results in an insulating ground state of the surface that is disparate from the hidden Mott insulator in the bulk. We demonstrate that voltage pulses induce local modifications to this state which relax over tens of minutes, pointing to a glassy nature of the charge order.
description: published paper and supplementary, 28 pages in total, 4 figures in the main text and 15 in the supplementary
Проживание в ЭкоКосмоДоме как способ предупреждения преждевременного старения организма
Creators: name: Бойко К.А.
name: Шемет Д.О.
Publisher: name: Сборник материалов V международной научно-технической конференции «Безракетная индустриализация ближнего космоса: проблемы, идеи, проекты»
Year: 2022
Subjects: антиоксиданты
замкнутая экосистема
преждевременное старение
профилактика старения
ЭкоКосмоДом (ЭКД)

description: Старение человеческого организма – явление, приводящее к неполному использованию видового биологического ресурса, а значит, относящееся к группе медико-социальных проблем. В настоящей статье освещены основные вопросы, связанные с процессом старения. Приведены сведения о факторах риска преждевременного старения. Представлены современные взгляды на средства предотвращения возрастных изменений; показана возможная профилактическая роль ЭкоКосмоДома (ЭКД) в предупреждении данного явления.
Spectral representation of the particle production out of equilibrium - Schwinger mechanism in pulsed electric fields
Creators: name: Fukushima, Kenji
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We develop a formalism to describe the particle production out of equilibrium in terms of dynamical spectral functions, i.e. Wigner transformed Pauli-Jordan's and Hadamard's functions. We take an explicit example of a spatially homogeneous scalar theory under pulsed electric fields and investigate the time evolution of the spectral functions. In the out-state we find an oscillatory peak in Hadamard's function as a result of the mixing between positive- and negative-energy waves. The strength of this peak is of the linear order of the Bogoliubov mixing coefficient, whereas the peak corresponding to the Schwinger mechanism is of the quadratic order. Between the in- and the out-states we observe a continuous flow of the spectral peaks together with two transient oscillatory peaks. We also discuss the medium effect at finite temperature and density. We emphasise that the entire structure of the spectral functions conveys rich information on real-time dynamics including the particle production.
description: 15 pages, 5 figures
Modular Many-Body Quantum Sensors
Creators: name: Mukhopadhyay, Chiranjib
name: Bayat, Abolfazl
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum many-body systems undergoing phase transitions have been proposed as probes enabling beyond-classical enhancement of sensing precision. However, this enhancement is usually limited to a very narrow region around the critical point. Here, we systematically develop a modular approach for introducing multiple phase transitions in a many-body system. This naturally allows us to enlarge the region of quantum-enhanced precision by encompassing the newly created phase boundaries. Our approach is general and can be applied to both symmetry-breaking and topological quantum sensors. In symmetry-breaking sensors, we show that the newly created critical points inherit the original universality class and a simple total magnetization measurement already suffices to locate them. In topological sensors, our modular construction creates multiple bands which leads to a rich phase diagram. In both cases, Heisenberg scaling for Hamiltonian parameter estimation is achieved at all the phase boundaries. This can be exploited to create a global sensor which significantly outperforms a uniform probe.
description: 4+6 pages, 6+4 figures, accepted for publication in Physical Review Letters
Motivic Multiple Zeta Values and the Block Filtration
Creators: name: Keilthy, Adam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11M32 11G99

description: We extend the block filtration, defined by Brown based on the work of Charlton, to all motivic multiple zeta values, and study relations compatible with this filtration. We construct a Lie algebra describing relations among motivic multiple zeta values modulo terms of lower block degree, proving Charlton's cyclic insertion conjecture in this structure, and showing the existence of a `block shuffle' relation, and a previously unknown dihedral symmetry and differential relation.
description: 23 pages, based on work in the author's doctoral thesis. Typo in statement of Corollary 2.9 corrected
"Quantum bipolaron" superconductivity from quadratic electron-phonon coupling
Creators: name: Han, Zhaoyu
name: Kivelson, Steven A.
name: Volkov, Pavel A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: When the electron-phonon coupling is quadratic in the phonon coordinates, electrons can pair to form bipolarons due to phonon zero-point fluctuations, a purely quantum effect. We study superconductivity originating from this pairing mechanism in a minimal model and reveal that, in the strong coupling regime, the critical temperature ($T_c$) is only mildly suppressed by the coupling strength, in stark contrast to the exponential suppression in linearly coupled systems, thus implying higher optimal $T_c$ values. We demonstrate that large coupling constants of this flavor are achieved in known materials such as perovskites, and discuss strategies to realize such superconductivity using superlattices.
Hierarchy and Polysynchrony in an adaptive network
Creators: name: Botella-Soler, V.
name: Glendinning, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We describe a simple adaptive network of coupled chaotic maps. The network reaches a stationary state (frozen topology) for all values of the coupling parameter, although the dynamics of the maps at the nodes of the network can be non-trivial. The structure of the network shows interesting hierarchical properties and in certain parameter regions the dynamics is polysynchronous: nodes can be divided in differently synchronized classes but contrary to cluster synchronization, nodes in the same class need not be connected to each other. These complicated synchrony patterns have been conjectured to play roles in systems biology and circuits. The adaptive system we study describes ways whereby this behaviour can evolve from undifferentiated nodes.
description: 13 pages, 17 figures
Leaf closures of Riemannian foliations: a survey on topological and geometric aspects of Killing foliations
Creators: name: Alexandrino, Marcos M.
name: Caramello, Francisco C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C12, 57R30

description: A smooth foliation is Riemannian when its leaves are locally equidistant. The closures of the leaves of a Riemannian foliation on a simply connected manifold, or more generally of a Killing foliation, are described by flows of transverse Killing vector fields. This offers significant technical advantages in the study of this class of foliations, which nonetheless includes other important classes, such as those given by the orbits of isometric Lie group actions. Aiming at a broad audience, in this survey we introduce Killing foliations from the very basics, starting with a brief revision of the main objects appearing in this theory, such as pseudogroups, sheaves, holonomy and basic cohomology. We then review Molino's structural theory for Riemannian foliations and present its transverse counterpart in the theory of complete pseudogroups of isometries, emphasizing the connections between these topics. We also survey some classical results and recent developments in the theory of Killing foliations. Finally, we review some topics in the theory of singular Riemannian foliations and discuss singular Killing foliations.
description: 42 pages, 9 figures. Removed section 10.1
Additional file 2 of Cesarean delivery or induction of labor in pre-labor twin gestations: a secondary analysis of the twin birth study
Creators: name: C Dougan
name: L Gotha
name: N Melamed
name: A Aviram
name: EV Asztalos
name: S Anabusi
name: AR Willan
name: JFR Barrett
name: Mei-Dan, E
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 2: Table S2. Maternal outcomes in women whose indication for delivery was “gestational-age window”.
Разработка концепции интеллектуальной системы непрерывной дистанционной диагностики технического состояния путевых структур экваториальной эстакады общепланетарного транспортного средства
Creators: name: Юницкий А.Э.
name: Бочкарёв Д.И.
name: Холодилов О.В.
Publisher: name: Сборник материалов V международной научно-технической конференции «Безракетная индустриализация ближнего космоса: проблемы, идеи, проекты»
Year: 2022
Subjects: акустическая эмиссия
диагностика
неразрушающий контроль
общепланетарное транспортное средство (ОТС)
путевая структура
распределённое акустическое зондирование

description: Стартовая эстакада общепланетарного транспортного средства (ОТС), размещённая вдоль экватора, представляет собой взлётно-посадочное, энергетическое, инфраструктурное и коммуникационное сооружение эстакадного типа, которое предназначено для геокосмических перевозок. Эстакада ОТС является сложной инженерной конструкцией, труднодоступной для проведения осмотров по традиционной технологии. В данной связи актуальным видится использование системы непрерывного мониторинга технического состояния основных элементов рассматриваемого ответственного инженерного объекта. В настоящей работе предложена концепция интеллектуальной системы непрерывной дистанционной диагностики технического состояния путевых структур экваториальной эстакады, основанная на применении методов акустической эмиссии и распределённого акустического зондирования, которые позволяют оперативно и с высокой точностью диагностировать дефекты в линейных объектах большой протяжённости.
Counterexamples for Topological Complexity in Digital Images
Creators: name: İs, Melih
name: Karaca, İsmet
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: Digital topology has its own working conditions and sometimes differs from the normal topology. In the area of topological robotics, we have important counterexamples in this study to emphasize this red line between a digital image and a topological space. We indicate that the results on topological complexities of certain path-connected topological spaces show alterations in digital images. We also give a result about the digital topological complexity number using the genus of a digital surface in discrete geometry.
Spatial Nonlocality of the Small-Scale Solar Dynamo
Creators: name: Lamb, Derek A.
name: Howard, Timothy A.
name: DeForest, Craig E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We explore the nature of the small-scale solar dynamo by tracking magnetic features. We investigate two previously-explored categories of the small-scale solar dynamo: shallow and deep. Recent modeling work on the shallow dynamo has produced a number of scenarios for how a strong network concentration can influence the formation and polarity of nearby small-scale magnetic features. These scenarios have measurable signatures, which we test for here using magnetograms from the Narrowband Filter Imager (NFI) on Hinode. We find no statistical tendency for newly-formed magnetic features to cluster around or away from network concentrations, nor do we find any statistical relationship between their polarities. We conclude that there is no shallow or "surface" dynamo on the spatial scales observable by Hinode/NFI. In light of these results, we offer a scenario in which the sub-surface field in a deep solar dynamo is stretched and distorted via turbulence, allowing the field to emerge at random locations on the photosphere.
description: Accepted by ApJ
Создание производств в ближнем космосе (на примере отраслей добывающей и обрабатывающей промышленности)
Creators: name: Юницкий А.Э.
name: Артюшевский С.В.
name: Климков А.Г.
name: Климкова О.Э.
Publisher: name: Сборник материалов V международной научно-технической конференции «Безракетная индустриализация ближнего космоса: проблемы, идеи, проекты»
Year: 2022
Subjects: ближний космос
добывающая промышленность
индекс целесообразности
индустриализация космоса
критерий
методика оценки
обрабатывающая промышленность
рейтинг
статистические данные
экспертная оценка

description: На основе обзора литературных источников подтверждена острая необходимость индустриализации космоса, создания в околоземном пространстве полноценных отраслей промышленности. В соответствии с разработанной авторами методикой, в том числе с использованием статистических данных и метода экспертной оценки, составлен рейтинг земных отраслей промышленности (как добывающей, так и обрабатывающей) для выявления целесообразности создания на их базе различных производств в ближнем космосе. Исходя из результатов, полученных в процессе исследования, сделаны выводы, а также даны рекомендации по их практическому использованию.
The Average Size and Temperature Profile of Quasar Accretion Disks
Creators: name: Jiménez-Vicente, J.
name: Mediavilla, E.
name: Kochanek, C. S.
name: Muñoz, J. A.
name: Motta, V.
name: Falco, E.
name: Mosquera, A. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use multi-wavelength microlensing measurements of a sample of 10 image pairs from 8 lensed quasars to study the structure of their accretion disks. By using spectroscopy or narrow band photometry we have been able to remove contamination from the weakly microlensed broad emission lines, extinction and any uncertainties in the large-scale macro magnification of the lens model. We determine a maximum likelihood estimate for the exponent of the size versus wavelength scaling ($r_s\propto λ^p$ corresponding to a disk temperature profile of $T\propto r^{-1/p}$) of $p=0.75^{+0.2}_{-0.2}$, and a Bayesian estimate of $p=0.8\pm0.2$, which are significantly smaller than the prediction of thin disk theory ($p=4/3$). We have also obtained a maximum likelihood estimate for the average quasar accretion disk size of $r_s=4.5^{+1.5}_{-1.2} $ lt-day at a rest frame wavelength of $λ= 1026~{\mathrm Å}$ for microlenses with a mean mass of $M=1 M_\sun$, in agreement with previous results, and larger than expected from thin disk theory.
description: 18 pags, 4 figures. Accepted for publication in the ApJ
Correlating light fields through disordered media across multiple degrees of freedom
Creators: name: Devaud, Louisiane
name: Rauer, Bernhard
name: Mauras, Simon
name: Rotter, Stefan
name: Gigan, Sylvain
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Speckle patterns are inherent features of coherent light propagation through complex media. As a result of interference, they are sensitive to multiple experimental parameters such as the configuration of disorder or the propagating wavelength. Recent developments in wavefront shaping have made it possible to control speckle pattern statistics and correlations, for example using the concept of the transmission matrix. In this article, we address the problem of correlating scattered fields across multiple degrees of freedom. We highlight the common points between the specific techniques already demonstrated, and we propose a general framework based on the singular value decomposition of a linear combination of multiple transmission matrices. Following analytical predictions, we experimentally illustrate the technique on spectral and temporal correlations, and we show that both the amplitude and the phase of the field correlations can be tuned. Our work opens up new perspectives in speckle correlation manipulation, with potential applications in coherent control.
RNA: Relightable Neural Assets
Creators: name: Mullia, Krishna
name: Luan, Fujun
name: Sun, Xin
name: Hašan, Miloš
Publisher: name: arXiv
Year: 2023
Subjects: subject: Graphics (cs.GR)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.3.7

description: High-fidelity 3D assets with materials composed of fibers (including hair), complex layered material shaders, or fine scattering geometry are ubiquitous in high-end realistic rendering applications. Rendering such models is computationally expensive due to heavy shaders and long scattering paths. Moreover, implementing the shading and scattering models is non-trivial and has to be done not only in the 3D content authoring software (which is necessarily complex), but also in all downstream rendering solutions. For example, web and mobile viewers for complex 3D assets are desirable, but frequently cannot support the full shading complexity allowed by the authoring application. Our goal is to design a neural representation for 3D assets with complex shading that supports full relightability and full integration into existing renderers. We provide an end-to-end shading solution at the first intersection of a ray with the underlying geometry. All shading and scattering is precomputed and included in the neural asset; no multiple scattering paths need to be traced, and no complex shading models need to be implemented to render our assets, beyond a single neural architecture. We combine an MLP decoder with a feature grid. Shading consists of querying a feature vector, followed by an MLP evaluation producing the final reflectance value. Our method provides high-fidelity shading, close to the ground-truth Monte Carlo estimate even at close-up views. We believe our neural assets could be used in practical renderers, providing significant speed-ups and simplifying renderer implementations.
description: Added Fig. 10 and Section 6.5 - new comparison
Target detection using underwater acoustic communication links
Creators: name: Shen, Lu
name: Zakharov, Yuriy
name: Henson, Benjamin
name: Morozs, Nils
name: Parrein, Benoît
name: Mitchell, Paul D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Underwater monitoring and surveillance systems are essential for underwater target detection, localization and classification. The aim of this work is to investigate the possibility of target detection by using data transmission between communication nodes in an underwater acoustic (UWA) network, i.e, re-using acoustic communication signals for target detection. A new target detection method based on estimation of the time-varying channel impulse response between the communication transmitter(s) and receiver(s) is proposed and investigated. This is based on a lake experiment and numerical experiments using a simulator developed for modeling the time-varying UWA channel in the presence of a moving target. The proposed detection method provides a clear indication of a target crossing the communication link. A good similarity between results obtained in the numerical and lake experiments is observed.
description: 12 pages, 14 figures
Perturbing free motions on hyper spheres without degeneracy lift
Creators: name: Pallares-Rivera, A.
name: Rosales-Aldape, F. de J.
name: Kirchbach, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider quantum motion on S3 perturbed by the trigonometric Scarf potential (Scarf I) with one internal quantized dimensionless parameter, l, the ordinary orbital angular momentum value, and another, continuous parameter, b, through which an external scale is introduced. We argue that a loss of the geometric hyper-spherical so(4) symmetry of the free motion occurs that leaves intact the unperturbed hydrogen-like degeneracy patterns characterizing the spectrum under discussion. The argument is based on the observation that the expansions of the Scarf I wave functions for fixed l-values in the basis of properly identified $so(4)$ representation functions are power series in the perturbation parameter, b, in which carrier spaces of dimensionality (K+1)^2 with K varying as K\in [l, N-1], and N being the principal quantum number of the Scarf I potential problem, contribute up to the order O(b^(N-1-K)). Nonetheless, the degeneracy patterns can still be interpreted as a consequence of an effective so(4) symmetry, i.e. a symmetry realized at the level of the dynamic of the system, in so far as from the perspective of the eigenvalue problem, the Scarf I results are equivalently obtained from a Hamiltonian with matrix elements of polynomials in a properly identified so(4) Casimir operator. The scheme applies to any dimension, d.
description: 14 pages. arXiv admin note: substantial text overlap with arXiv:1305.1281
Auto-Sklearn 2.0: Hands-free AutoML via Meta-Learning
Creators: name: Feurer, Matthias
name: Eggensperger, Katharina
name: Falkner, Stefan
name: Lindauer, Marius
name: Hutter, Frank
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Automated Machine Learning (AutoML) supports practitioners and researchers with the tedious task of designing machine learning pipelines and has recently achieved substantial success. In this paper, we introduce new AutoML approaches motivated by our winning submission to the second ChaLearn AutoML challenge. We develop PoSH Auto-sklearn, which enables AutoML systems to work well on large datasets under rigid time limits by using a new, simple and meta-feature-free meta-learning technique and by employing a successful bandit strategy for budget allocation. However, PoSH Auto-sklearn introduces even more ways of running AutoML and might make it harder for users to set it up correctly. Therefore, we also go one step further and study the design space of AutoML itself, proposing a solution towards truly hands-free AutoML. Together, these changes give rise to the next generation of our AutoML system, Auto-sklearn 2.0. We verify the improvements by these additions in an extensive experimental study on 39 AutoML benchmark datasets. We conclude the paper by comparing to other popular AutoML frameworks and Auto-sklearn 1.0, reducing the relative error by up to a factor of 4.5, and yielding a performance in 10 minutes that is substantially better than what Auto-sklearn 1.0 achieves within an hour.
description: Final version as published at JMLR 23(261)
Plasma radio emission from inhomogeneous collisional plasma of a flaring loop
Creators: name: Ratcliffe, Heather
name: Kontar, Eduard. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The evolution of a solar flare accelerated non-thermal electron population and associated plasma emission is considered in collisional inhomogeneous plasma. Non-thermal electrons collisionally evolve to become unstable and generate Langmuir waves, which may lead to intense radio emission. We self-consistently simulated the collisional relaxation of electrons, wave-particle interactions, and non-linear Langmuir wave evolution in plasma with density fluctuations. Additionally, we simulated the scattering, decay, and coalescence of the Langmuir waves which produce radio emission at the fundamental or the harmonic of the plasma frequency, using an angle-averaged emission model. Long-wavelength density fluctuations, such as are observed in the corona, are seen to strongly suppress the levels of radio emission, meaning that a high level of Langmuir waves can be present without visible radio emission. Additionally, in homogeneous plasma, the emission shows time and frequency variations that could be smoothed out by density inhomogeneities.