cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Repulsive gravity near naked singularities and point massive particles
Creators: name: Maluf, J. W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the existence of repulsive gravitational acceleration near naked singularities. The investigation is carried out by means of the acceleration tensor, which is a coordinate invariant object. We find that the gravitational acceleration is repulsive in the vicinity of the origin in the Reissner-Nordstrøm and in the Kerr space-times, and attractive at large distances in the expected Newtonian way. We further address the space-time of a point massive particle, which also exhibits repulsive effects near the origin.
description: 14 pages, no figures, referenced added, published in the General Relativity and Gravitation Journal
X-ray and optical analysis of the distant, merging double cluster SPT-CLJ2228-5828, its gas bridge, and shock front
Creators: name: Migkas, K.
name: Sommer, M. W.
name: Schrabback, T.
name: Carrasco, E. R.
name: Zenteno, A.
name: Zohren, H.
name: Bleem, L. E.
name: Nazaretyan, V.
name: Bayliss, M.
name: Bulbul, E.
name: Floyd, B.
name: Gassis, R.
name: McDonald, M.
name: Grandis, S.
name: Reichardt, C.
name: Sarkar, A.
name: Sharon, K.
name: Somboonpanyakul, T.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Galaxy cluster mergers are excellent laboratories for studying a wide variety of different physical phenomena. Such a unique system is the distant SPT-CLJ2228-5828 cluster merger located at $z\approx 0.77$. Previous analyses via Sunyaev-Zeldovich and weak lensing data suggested that the system potentially was a dissociative cluster post-merger. In this work, we use new, deep XMM-Newton data to study the hot gas in X-rays, spectroscopic Gemini data to precisely determine the redshift of the two mass concentrations, and new HST data to improve the total mass estimates of the two components. We find that SPT-CLJ2228-5828 constitutes a pre-merging, double cluster system, instead of a post-merger. The merging process of the two clusters has started with their outskirt gas colliding with a $\sim 22^{\circ}-27^{\circ}$ on the plane of the sky. We fully characterize the surface brightness, gas density, temperature, pressure, and entropy profiles of the two merging clusters. The two systems have very similar X-ray properties with a moderate cluster mass of $M_{\text{tot}}\sim (2.1-2.4)\times 10^{14}\ M_{\odot}$. A $\approx 333$ kpc long gas bridge connecting the two clusters is detected at a $5.8σ$ level. The baryon overdensity of the excess bridge gas is $δ_{\text{b}}\sim (75-320)$ across the length of the bridge and its gas mass is $M_{\text{gas}}\sim 1.4\times 10^{12}\ M_{\odot}$. Gas density and temperature jumps are also found across the gas bridge, revealing the existence of a weak shock front with a Mach number $\mathcal{M}\sim 1.1$. The gas pressure and entropy are also increased at the position of the shock front. We estimate the age of the shock front to be $\lesssim 100$ Myr and its kinetic energy $\sim 2.4\times 10^{44}$ erg s$^{-1}$. SPT-CLJ2228-5828 is the first such high-$z$ pre-merger with a gas bridge and a shock front to be studied in X-rays.
description: 21 pages, 9 figures. Submitted for publication in A&A
LIBRA: Enabling Workload-aware Multi-dimensional Network Topology Optimization for Distributed Training of Large AI Models
Creators: name: Won, William
name: Rashidi, Saeed
name: Srinivasan, Sudarshan
name: Krishna, Tushar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: As model sizes in machine learning continue to scale, distributed training is necessary to accommodate model weights within each device and to reduce training time. However, this comes with the expense of increased communication overhead due to the exchange of gradients and activations, which become the critical bottleneck of the end-to-end training process. In this work, we motivate the design of multi-dimensional networks within machine learning systems as a cost-efficient mechanism to enhance overall network bandwidth. We also identify that optimal bandwidth allocation is pivotal for multi-dimensional networks to ensure efficient resource utilization. We introduce LIBRA, a framework specifically focused on optimizing multi-dimensional fabric architectures. Through case studies, we demonstrate the value of LIBRA, both in architecting optimized fabrics under diverse constraints and in enabling co-optimization opportunities.
description: Contains 10 main pages, 21 figures, 3 tables
Deutscher Bauer horch!; 1918
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2014

description: Enth. ausserdem: Was bedeutet der "Wilson"-Frieden für den deutschen Steuerzahler?. - Einzelaufnahme eines Zs.-Bandes
Ginzburg-Landau vortices, Coulomb Gases, and Renormalized Energies
Creators: name: Serfaty, Sylvia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: This is a review about a series of results on vortices in the Ginzburg-Landau model of superconductivity on the one hand, and point patterns in Coulomb gases on the other hand, as well as the connections between the two topics.
description: review paper, submitted to J. Stat. Phys
11 Controle em Foco, A UNIAO EUROPEIA E O IMPACTO DA COVID-19 SOBRE AS POLITICAS DE EMPREGO.
Creators: name: Ministério Publico de Contas do Estado de Minas Gerais
Publisher: name: Zenodo
Year: 2021

description: o presente artigo tem por objetivo analisar as medidas adotadas pela União Europeia no marco das estratégias de enfrentamento às consequências da COVID-19, em especial aquelas necessárias para o fortalecimento econômico a partir da perspectiva das garantias laborais. Busca-se determinar os mecanismos que foram inicialmente pensados pelas instituições europeias que possibilitassem uma retomada do mercado de trabalho europeu, sem olvidar as assimetrias existentes no chamado mercado comum. Para tal, foi analisado o principal instrumento adotado – Programa SURE – cujo aporte foi importante para assegurar as condições de emprego, bem como minimizar os efeitos negativos da pandemia. Utilizou-se o método dedutivo para compreensão das premissas que envolvem um processo de integração tão complexo como é o caso da União Europeia. Finalmente, verificou-se a importância do esforço conjunto realizado pelas instituições europeias e nacionais no combate às adversidades causadas pela COVID-19.
Emergence of high-mass stars in complex fiber networks (EMERGE) V. From filaments to spheroids: the origin of the hub-filament systems
Creators: name: Hacar, A.
name: Konietzka, R.
name: Seifried, D.
name: Clark, S. E.
name: Socci, A.
name: Bonanomi, F.
name: Burkert, A.
name: Schisano, E.
name: Kainulainen, J.
name: Smith, R.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Identified as parsec-size, gas clumps at the junction of multiple filaments, hub-filament systems (HFS) play a crucial role during the formation of young clusters and high-mass stars. These HFS appear nevertheless to be detached from most galactic filaments when compared in the mass-length (M-L) phase-space. We aim to characterize the early evolution of HFS as part of the filamentary description of the interstellar medium. Combining previous scaling relations with new analytic calculations, we created a toy model to explore the different physical regimes described by the M-L diagram. Despite its simplicity, our model accurately reproduces several observational properties reported for filaments and HFS such as their expected typical aspect ratio ($A$), mean surface density ($Σ$), and gas accretion rate ($\dot{m}$). Moreover, this model naturally explains the different mass and length regimes populated by filaments and HFS, respectively. Our model predicts a dichotomy between filamentary ($A\geq 3$) and spheroidal ($A<3$) structures connected to the relative importance of their fragmentation, accretion, and collapse timescales. Individual filaments with low accretion rates are dominated by an efficient internal fragmentation. In contrast, the formation of compact HFS at the intersection of filaments triggers a geometric phase-transition leading to the gravitational collapse of these structures at parsec-scales in $\sim$1Myr also inducing higher accretion rates.
description: Accepted by A&A, 17 pages, 11 figures
Radially Polarized, Half-Cycle, Attosecond Pulses from Laser Wakefields through Coherent Synchrotron Radiation
Creators: name: Li, F. Y.
name: Sheng, Z. M.
name: Chen, M.
name: Yu, L. L.
name: Meyer-ter-Vehn, J.
name: Mori, W. B.
name: Zhang, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Attosecond bursts of coherent synchrotron-like radiation are found when driving ultrathin relativistic electron disks in a quasi-one-dimensional regime of wakefield acceleration, in which the laser waist is larger than the wake wavelength. The disks of overcritical density shrink radially due to the focusing wake fields, thus providing the transverse currents for the emission of an intense, radially polarized, half-cycle pulse of about 100 attoseconds in duration. The electromagnetic pulse first focuses to a peak intensity 10 times larger ($7\times10^{20}\rm W/cm^2$) than the driving pulse and then emerges as a conical beam. Saturation of the emission amplitudes is derived analytically and in agreement with particle-in-cell simulation. By making use of gas targets instead of solids to form the ultrathin disks, the new scheme allows for high repetition rate required for applications.
description: 5 pages, 4 figures
Phonons, Nature of Bonding and Their Relation to Anomalous Thermal Expansion Behavior of M2O (M=Au, Ag, Cu)
Creators: name: Gupta, M. K.
name: Mittal, R.
name: Chaplot, S. L.
name: Rols, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a comparative study of the dynamics of Cu2O, Ag2O and Au2O (i.e. M2O with M = Au, Ag and Cu) using first principle calculations based on the density functional theory. Here for the first time we show that the nature of chemical bonding and open space in the unit cell are directly related to the magnitude of thermal expansion coefficient. A good match between the calculated phonon density of states and that derived from inelastic neutron scattering measurements is obtained for Cu2O and Ag2O. The calculated thermal expansions of Ag2O and Cu2O are negative, in agreement with available experimental data, while it is found to be positive for Au2O. We identify the low energy phonon modes responsible for this anomalous thermal expansion. We further calculate the charge density in the three compounds and find that the magnitude of the ionic character of the Ag2O, Cu2O, and Au2O crystals is in decreasing order, with an Au-O bond of covalent nature strongly rigidifying the Au4O tetrahedral units. The nature of the chemical bonding is also found to be an important ingredient to understand the large shift of the phonon frequencies of these solids with pressure and temperature. In particular, the quartic component of the anharmonic term in the crystal potential is able to account for the temperature dependence of the phonon modes.
description: 24 Pages, 13 Figures, Supplementary material
Rotational Synchronization May Enhance Habitability for Circumbinary Planets: Kepler Binary Case Studies
Creators: name: Mason, Paul A.
name: Zuluaga, Jorge I.
name: Clark, Joni
name: Cuartas, Pablo A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We report a mechanism capable of reducing (or increasing) stellar activity in binary stars, thereby potentially enhancing (or destroying) circumbinary habitability. In single stars, stellar aggression towards planetary atmospheres causes mass-loss, which is especially detrimental for late-type stars, because habitable zones are very close and activity is long lasting. In binaries, tidal rotational breaking reduces magnetic activity, thus reducing harmful levels of XUV radiation and stellar mass-loss that are able to erode planetary atmospheres. We study this mechanism for all confirmed circumbinary (p-type) planets. We find that main sequence twins provide minimal flux variation and in some cases improved environments, if the stars rotationally synchronize within the first Gyr. Solar-like twins, like Kepler 34 and Kepler 35, provide low habitable zone XUV fluxes and stellar wind pressures. These wide, moist, habitable zones may potentially support multiple habitable planets. Solar-type stars with lower mass companions, like Kepler 47, allow for protected planets over a wide range of secondary masses and binary periods. Kepler 38 and related binaries are marginal cases. Kepler 64 and analogues have dramatically reduced stellar aggression due to synchronization of the primary, but are limited by the short lifetime. Kepler 16 appears to be inhospitable to planets due to extreme XUV flux. These results have important implications for estimates of the number of stellar systems containing habitable planets in the Galaxy and allow for the selection of binaries suitable for follow-up searches for habitable planets.
description: 8 pages, 5 figures. Accepted for publications in Astrophysical Journal Letters. For additional information and updates please visit http://astronomia.udea.edu.co/binary-habitability
Configurable memory systems for embedded many-core processors
Creators: name: Bates, Daniel
name: Chadwick, Alex
name: Mullins, Robert
Publisher: name: Apollo - University of Cambridge Repository
Year: 2016

description: The memory system of a modern embedded processor con- sumes a large fraction of total system energy. We explore a range of different configuration options and show that a reconfigurable design can make better use of the resources available to it than any fixed implementation, and provide large improvements in both performance and energy con- sumption. Reconfigurability becomes increasingly useful as resources become more constrained, so is particularly rele- vant in the embedded space. For an optimised architectural configuration, we show that a configurable cache system performs an average of 20% (maximum 70%) better than the best fixed implementation when two programs are competing for the same resources, and reduces cache miss rate by an average of 70% (maximum 90%). We then present a case study of AES encryption and decryption, and find that a custom memory configuration can almost double performance, with further benefits being achieved by specialising the task of each core when parallelising the program.
Hydrodynamic Burnett equations for inelastic Maxwell models of granular gases
Creators: name: Khalil, Nagi
name: Garzó, Vicente
name: Santos, Andrés
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The hydrodynamic Burnett equations and the associated transport coefficients are exactly evaluated for generalized inelastic Maxwell models. In those models, the one-particle distribution function obeys the inelastic Boltzmann equation, with a velocity-independent collision rate proportional to the $γ$ power of the temperature. The pressure tensor and the heat flux are obtained to second order in the spatial gradients of the hydrodynamic fields with explicit expressions for all the Burnett transport coefficients as functions of $γ$, the coefficient of normal restitution, and the dimensionality of the system. Some transport coefficients that are related in a simple way in the elastic limit become decoupled in the inelastic case. As a byproduct, existing results in the literature for three-dimensional elastic systems are recovered, and a generalization to any dimension of the system is given. The structure of the present results is used to estimate the Burnett coefficients for inelastic hard spheres.
description: 16 pages, 5 figures; v2: new Appendix (D) and new references added
MusE GAs FLOw and Wind (MEGAFLOW) XII. Rationale and design of a MgII survey of the cool circum-galactic medium with MUSE and UVES: The MEGAFLOW Survey
Creators: name: Bouché, N. F.
name: Wendt, M.
name: Zabl, J.
name: Cherrey, M.
name: Schroetter, I.
name: Langan, I.
name: Muzahid, S.
name: Schaye, J.
name: Epinat, B.
name: Wisotzki, L.
name: Contini, T.
name: Richard, J.
name: Bacon, R.
name: Weilbacher, P. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the design, rationale, properties and catalogs of the MusE Gas FLOw and Wind survey (MEGAFLOW), a survey of the cool gaseous halos of $z\sim1$ galaxies using low-ionization MgII absorption systems. The survey consists of 22 quasar fields selected from the Sloan Digital Sky Survey (SDSS) having multiple ($\geq3$) strong MgII absorption lines over the redshift range $0.31$, i.e. more than 60 galaxies per arcmin$^{2}$. They were identified using a dual detection algorithm based on both continuum and emission line objects. The achieved [OII] 50\%\ completeness is 3.7$\times 10^{-18}$ erg/s/cm$^2$ (corresponding to SFR$>0.01$ M$_\odot$ yr$^{-1}$ at $z=1$) using realistic mock [OII] emitters and the 50\%\ completeness is $m_{F775W}\approx26$ AB magnitudes for continuum sources. We find that (i) the fraction of [OII] emitting galaxies which have no continuum is $\sim15$\%; (ii) the success rate in identifying at least one galaxy within 500 km/s and 100 kpc is $\approx90$\%\ for MgII absorptions with $W_r^{2796}\gtrsim0.5$~Å; (iii) the mean number of galaxies per MgII absorption is $2.9\pm1.6$ within the MUSE field-of-view; (iv) of the 80 MgII systems at $0.310^9$ M$_\odot$, and star-formation rates $>1$ M$_\odot$ yr$^{-1}$.
description: 23 pages; 16 figures; in press for publication in A&A; accepted version
Modular reduction of the Steinberg lattice of the general linear group
Creators: name: Szechtman, Fernando
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20G05 (20G40)

description: The modular reduction of the Steinberg lattice of the general linear group is studied
e-Highway 2050 WP5 : Towards a governance model for the European electricity transmission network in 2050
Creators: name: De Clercq, Bernard
name: Ruiz Prada, Clara
name: Papon, Max
name: Guzzi, Berardo
name: Ibba, Silvia
name: Pelliccioni, Mara
name: Sijm, Jos
name: Van Der Welle, Adriaan
name: De Vos, Kristof
name: Huang, Diyun
name: Olmos, Luis
name: Rivier, Michel
name: Golshani, Mohammad
name: Taylor, Gareth
name: Bhavanam, Yaminidhar
Publisher: name: Zenodo
Year: 2015

description: The e-Highway 2050 project aimed at delivering a top-down methodology to support the planning of the European power grid from 2020 to 2050. The final deliverable of Work Package 5 provides a detailed and comprehensive analysis regarding the future governance of the European transmission network with a crossborder impact. The deliverable extensively addresses the two formulated objectives of WP5:
 - To propose a set of key regulatory principles, referred to as “options”, to be considered when determining the appropriate governance framework for the electricity transmission networks of 2050;
 - To develop a policy roadmap for the intermediate period in order to implement the options by 2050.
Revisiting $B\to K^*π$ and $B\to Kρ$ decays using the modified perturbative QCD approach
Creators: name: Wang, Ru-Xuan
name: Yang, Mao-Zhi
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revisit $B\to K^*π$ and $B\to Kρ$ decay processes using the modified perturbative QCD approach, which is developed based on the perturbative QCD approach with a few improvements. A critical infrared cutoff scale $μ_c$ is introduced to separate hard and soft contributions in the decay process. Hard contributions with scale $μ$ larger than $μ_c$ are calculated with perturbative QCD, and soft contributions with $μ<μ_c$ are described in terms of soft transition and production form factors. In addition, color-octet contributions are considered phenomenologically. The branching fractions and $CP$ violations of $B\to K^*π$, $Kρ$ decays are calculated. With appropriate parameter inputs, the theoretical results can be in good agreement with experimental data.
description: 16 pages, 1 figure
Slowly rotating and charged Black-holes in Entangled Relativity
Creators: name: Wavasseur, Maxime
name: Abrial, Theo
name: Minazzoli, Olivier
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Entangled Relativity is a non-linear reformulation of Einstein's General Theory of Relativity (General Relativity) that offers a more parsimonious formulation. This non-linear approach notably requires the simultaneous definition of matter fields, thus aligning more closely with Einstein's \textit{principle of relativity of inertia} than General Relativity does. Solutions for spherically charged black holes have already been identified. After exploring further some of the properties of these solutions, we present new solutions for the field equations pertaining to slowly rotating charged black holes.
description: 17 pages. V2: minor changes
Application-Oriented Performance Benchmarks for Quantum Computing
Creators: name: Lubinski, Thomas
name: Johri, Sonika
name: Varosy, Paul
name: Coleman, Jeremiah
name: Zhao, Luning
name: Necaise, Jason
name: Baldwin, Charles H.
name: Mayer, Karl
name: Proctor, Timothy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we introduce an open source suite of quantum application-oriented performance benchmarks that is designed to measure the effectiveness of quantum computing hardware at executing quantum applications. These benchmarks probe a quantum computer's performance on various algorithms and small applications as the problem size is varied, by mapping out the fidelity of the results as a function of circuit width and depth using the framework of volumetric benchmarking. In addition to estimating the fidelity of results generated by quantum execution, the suite is designed to benchmark certain aspects of the execution pipeline in order to provide end-users with a practical measure of both the quality of and the time to solution. Our methodology is constructed to anticipate advances in quantum computing hardware that are likely to emerge in the next five years. This benchmarking suite is designed to be readily accessible to a broad audience of users and provides benchmarks that correspond to many well-known quantum computing algorithms.
description: 33 pages, 36 figures; Added to Section VI about Impact of Compiler Optimization Techniques; Updated 20230105 for clarity after review feedback
A Carleman estimate and an energy method for a first-order symmetric hyperbolic system
Creators: name: Floridia, G.
name: Takase, H.
name: Yamamoto, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: For a symmetric hyperbolic system of the first order, we prove a Carleman estimate under some positivity condition concerning the coefficient matrices. Next, applying the Carleman estimate, we prove an observability $L^2$-estimate for initial values by boundary data.
Lamb shift enhancement and detection in strongly driven superconducting circuits
Creators: name: Gramich, Vera
name: Gasparinetti, Simone
name: Solinas, Paolo
name: Ankerhold, Joachim
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is shown that strong driving of a quantum system substantially enhances the Lamb shift induced by broadband reservoirs which are typical for solid-state devices. By varying drive parameters the impact of environmental vacuum fluctuations with continuous spectral distribution onto system observables can be tuned in a distinctive way. This provides experimentally feasible measurement schemes for the Lamb shift in superconducting circuits based on Cooper pair boxes, where it can be detected either in shifted dressed transition frequencies or in pumped charge currents.
description: 5 pages, 4 figures + 4 pages supplemental material
Mutual Influence of Photon Sphere and Non-Commutative Parameter in Various Non-Commutative Black Holes: Part I- Towards evidence for WGC
Creators: name: Afshar, Mohammad Ali S.
name: Sadeghi, Jafar
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Non-commutative black holes(NCBH), due to the non-commutativity of spacetime coordinates, lead to a modification of the spacetime metric. By replacing the Dirac delta function with a Gaussian distribution, the mass is effectively smeared, eliminating point-like singularities. Our objective is to investigate the impact of this change on spacetime geodesics, including photon spheres and time-like orbits. We will demonstrate how the photon sphere can serve as a tool to classify spacetime, illustrating the influence of the NC parameter and constraining its values in various modes of these black holes. Additionally, using this classification, we will show how the addition of the nonlinear Einstein-Born-Infeld(BI) field to the model enhances its physical alignment with reality compared to the charged model. In the dS BI model, we will show how the study of the effective potential and photon sphere can provide insights into the initial structural status of the model, thereby establishing this potential as an effective tool for examining the initial conditions of black holes. Finally, by examining super-extremality conditions, we will show that the AdS BI model, with the necessary conditions, can be a suitable candidate for studying and observing the effects of the Weak Gravity Conjecture (WGC).
description: 24 pages, 15 figures
Intermittency and Slip-Size Distribution in the Block-Spring Model of Earthquakes
Creators: name: Sakaguchi, Hidetsugu
name: Morita, Shingo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geophysics (physics.geo-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The Carlson-Langer model is a deterministic model of earthquakes. There were many investigations of this model, but its complicated spatio-temporal dynamics is not yet completely understood. We again study the model equation numerically, and obtain two new results. Firstly, we try to understand the complicated dynamics from the viewpoint of spatio-temporal intermittency. We study the intermittent dynamics of a two-block system using a one-dimensional map, which is useful for understanding an intermittent spatio-temporal chaos in larger systems. Large slips occur intermittently after repeated small slips when the parameter of the velocity weakening friction is large. Small slips reduce the spatial irregularity of block displacement, and large slips occur on a relatively flat configuration of blocks. Secondly, we study the effect of spatial heterogeneity such as asperity using percolation clusters. We show the numerical results of the slip-size distribution in the block-spring model on percolation clusters, and find that the b parameter for the magnitude distribution is close to 2/3 when the velocity weakening parameter is intermediate.
description: 10 pages, 10 figures
12 Controle em Foco REGIME JURIDICO DA RESPONSABILIDADE POR DANO AO ERARIO APURADO PELOS TCs A LUZ DA LINDB.
Creators: name: Ministério Publico de Contas do Estado de Minas Gerais
Publisher: name: Zenodo
Year: 2021

description: A Lei n. 13.655/2018 inseriu o art. 28 na Lei de Introdução às normas do Direito Brasileiro - LINDB (DecretoLei n. 4.657/1942) cuja redação é no sentido de que a responsabilidade do agente público por decisões ou opiniões técnicas somente se configura em caso de dolo ou erro grosseiro. Surgiu-se assim divergência entre a doutrina e o Tribunal de Contas da União -TCU sobre a aplicabilidade do referido dispositivo à esfera de responsabilidade sobre dano ao erário apurada pelos tribunais de contas. Nesse sentido, o presente trabalho busca estudar e fomentar o debate sobre a natureza e regime jurídico de responsabilidade apurada pelas cortes de contas, a denominada responsabilidade financeira. Sob a perspectiva de entender tal singular instituto foram abordados estudos doutrinários que sustentam sua independência doutrinária, a fim de analisar, criticamente, se o art. 28 da LINDB influenciou esse tipo de responsabilidade. Conclui-se que o dispositivo deve influenciar a apuração de responsabilidade financeira e a efetividade do controle externo, sem representar qualquer favorecimento ao gestor público de má-fé, mas tão somente a valorização do administrador bem-intencionado ao mesmo tempo que reafirma o regime de responsabilidade próprio dos tribunais de contas.
A Fast Horizon Detector and a New Annotated Dataset for Maritime Video Processing
Creators: name: Zardoua, Yassir
name: Mohammed, Boulaala
name: Mrabet, Mhamed El
name: Abdelali, Astito
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Accurate and fast sea horizon detection is vital for tasks in autonomous navigation and maritime security, such as video stabilization, target region reduction, precise tracking, and obstacle avoidance. This paper introduces a novel sea horizon detector from RGB videos, focusing on rapid and effective sea noise suppression while preserving weak horizon edges. Line fitting methods are subsequently employed on filtered edges for horizon detection. We address the filtering problem by extracting line segments with a very low edge threshold, ensuring the detection of line segments even in low-contrast horizon conditions. We show that horizon line segments have simple and relevant properties in RGB images, which we exploit to suppress noisy segments. Then we use the surviving segments to construct a filtered edge map and infer the horizon from the filtered edges. We propose a careful incorporation of temporal information for horizon inference and experimentally show its effectiveness. We address the computational constraint by providing a vectorized implementation for efficient CPU execution, and leveraging image downsizing with minimal loss of accuracy on the original size. Moreover, we contribute a public horizon line dataset to enrich existing data resources. Our algorithm's performance is rigorously evaluated against state-of-the-art methods, and its components are validated through ablation experiments. Source code and dataset files are available at: https://github.com/Zardoua-Yassir/A_fast_horizon_detector_and_a_new_annotated_dataset_for_maritime_video_processing
A note on odd reflections of super Yangian and Bethe ansatz
Creators: name: Lu, Kang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In a recent paper arXiv:2109.09462, Molev introduced analogues of the odd reflections for the super Yangian $\mathrm{Y}(\mathfrak{gl}_{m|n})$ and obtained a transition rule for the change of highest weights when the parity sequence is altered. In this note, we reproduce the results from a different point of view and discuss their relations with the fermionic reproduction procedure of the XXX-type Bethe ansatz equations introduced in arXiv:1811.11225. We give an algorithm that how the $q$-characters change under the odd reflections. We also take the chance to compute explicitly the $q$-characters of skew representations of $\mathrm{Y}(\mathfrak{gl}_{m|n})$ for arbitrary parity sequences.
description: 21 pages. This note is a continuation of arXiv:2007.15573 and arXiv:2103.08758. V2: fixed typos and grammar mistakes, added remarks and references
Quantum Control of Infinite Dimensional Many-Body Systems
Creators: name: Bliss, Roger S.
name: Burgarth, Daniel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A major challenge to the control of infinite dimensional quantum systems is the irreversibility which is often present in the system dynamics. Here we consider systems with discrete-spectrum Hamiltonians operating over a Schwartz space domain, and show that by utilizing the implications of the Quantum Recurrence Theorem this irreversibility may be overcome, in the case of individual states more generally, but also in certain specified cases over larger subsets of the Hilbert space. We discuss briefly the possibility of using these results in the control of infinite dimensional coupled harmonic oscillators, and also draw attention to some of the issues and open questions arising from this and related work.
Simulating Ionized States in Realistic Chemical Environments With Algebraic Diagrammatic Construction Theory and Polarizable Embedding
Creators: name: Serna, James D.
name: Sokolov, Alexander Yu.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Theoretical simulations of electron detachment processes are vital for understanding chemical redox reactions, semiconductor and electrochemical properties, and high-energy radiation damage. However, accurate calculations of ionized electronic states are very challenging due to their open-shell nature, importance of electron correlation effects, and strong interactions with chemical environment. In this work, we present an efficient approach based on algebraic diagrammatic construction theory with polarizable embedding that allows to accurately simulate ionized electronic states in condensed-phase or biochemical environments (PE-IP-ADC). We showcase the capabilities of PE-IP-ADC by computing the vertical ionization energy (VIE) of thymine molecule solvated in bulk water. Our results show that the second- and third-order PE-IP-ADC methods combined with the basis of set of triple-zeta quality yield a solvent-induced shift in VIE of -0.92 and -0.93 eV, respectively, in an excellent agreement with experimental estimate of -0.9 eV. This work demonstrates the power of PE-IP-ADC approach for simulating charged electronic states in realistic chemical environments and motivates its further development.
Perturbative Description of the Fermionic Projector: Normalization, Causality and Furry's Theorem
Creators: name: Finster, Felix
name: Tolksdorf, Jürgen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The causal perturbation expansion of the fermionic projector is performed with a contour integral method. Different normalization conditions are analyzed. It is shown that the corresponding light-cone expansions are causal in the sense that they only involve bounded line integrals. For the resulting loop diagrams we prove a generalized Furry theorem.
description: 34 pages, LaTeX, 2 ancillary files, minor improvements (published version)
An die Herren Vertrauensmänner. Als in den Novembertagen des vorigen Jahres das deutsche Volk die Waffen niederlegte, ... da hoffte es, dem entsetzlichen Blutvergiesen[!] ein Ende machen, ... zu können. ...; [1919]
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2009

description: Das Schriftstück trägt den Stempel "Reichswehr Werbe-Büro Gunzenhausen" (angegebene Tel.-Nr. nicht lesbar)
Douze Sonates Pour Le Violon : Dédiées A son Excellence Il Signore G. A. Giustiniani : Œuvre 1.er
Creators: name: Tartini, Giuseppe
Publisher: name: Chez Janet et Cotelle Editeurs, M.ds de Musique du Roi, Rue St. Honoré, No. 123 et Rue de Richelieu, No. 92
Year: 1810

description: Par G. Tartini
Examining the evolution of the Supersoft X-ray Source RX J0513.9-6951
Creators: name: Tavleev, A.
name: Suleimanov, V. F.
name: Werner, K.
name: Santangelo, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Supersoft X-ray sources (SSS) are thought to be accreting white dwarfs (WDs) in close binary systems, with thermonuclear burning on their surfaces. The SSS RX J0513.9-6951 in the Large Magellanic Cloud (LMC) exhibits cyclic variations between optical low and high states, which are anti-correlated with its X-ray flux. This behaviour is believed to result from the periodic expansion and contraction of the WD due to variations in the accretion rate in the system. We analyse eight high-resolution XMM and six grating Chandra spectra of RX J0513.9-6951 with our grid of model atmosphere spectra of hot WDs computed under the assumption of local thermodynamic equilibrium. Our aim is to test a contraction model of the source variability by tracking the evolution of the WD properties. The used grid of hot WD model atmospheres spans a wide range of effective temperatures ($T_{\rm eff}=100-1000\,\rm kK$ in steps of $25\,\rm kK$) and eight values of surface gravity $\log g$. The LMC chemical composition was assumed. The obtained fitting parameters ($T_{\rm eff}$, $\log g$, and bolometric luminosity $L$) evolve on the $T_{\rm eff}- \log g$ and $T_{\rm eff}- L$ planes. This evolution follows the model tracks of WDs with masses of $1.05-1.15\,M_{\odot}$ and thermonuclear burning on the surface. The analysis has showed that the optical brightness of the system is lower when the WD is larger, more luminous, and more effectively illuminates the accretion disc. These results contradict the contraction model, which predicts the opposite behaviour of the source. We use a model, that assumes that the far UV/soft X-ray flux is reprocessed into the optical band due to multiple scattering in the cloud system above the accretion disc. More significant illumination can lead to rarefying of the cloud slab, thereby reducing the reprocessing efficiency and making the source fainter in the optical band.
description: 10 pages, 8 figures, 4 tables, accepted for publication in A&A
13 Controle em Foco DESCONTO COMPULSORIO EM FOLHA DE PAGAMENTO.
Creators: name: Ministério Publico de Contas do Estado de Minas Gerais
Publisher: name: Zenodo
Year: 2021

description: O presente trabalho analisa a efetividade das decisões condenatórias dos tribunais de contas, com enfoque na possibilidade da execução forçada por meio do desconto na folha de pagamento do agente responsabilizado. Após trazer considerações gerais sobre a matéria, analisa-se a legalidade da medida na jurisprudência do Supremo Tribunal Federal, seguida de levantamento, junto aos 33 (trinta e três) tribunais de contas do país, a fim de verificar quais possuem normas autorizativas para determinar o desconto compulsório em folha, e quais utilizam rotineiramente tal modalidade de execução forçada. Ao final, são sugeridos alguns parâmetros para o emprego da medida, no intuito de fomentar sua implementação pelos tribunais de contas.
A Bayesian Model for Online Activity Sample Sizes
Creators: name: Richardson, Thomas
name: Liu, Yu
name: McQueen, James
name: Hains, Doug
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In many contexts it is useful to predict the number of individuals in some population who will initiate a particular activity during a given period. For example, the number of users who will install a software update, the number of customers who will use a new feature on a website or who will participate in an A/B test. In practical settings, there is heterogeneity amongst individuals with regard to the distribution of time until they will initiate. For these reasons it is inappropriate to assume that the number of new individuals observed on successive days will be identically distributed. Given observations on the number of unique users participating in an initial period, we present a simple but novel Bayesian method for predicting the number of additional individuals who will participate during a subsequent period. We illustrate the performance of the method in predicting sample size in online experimentation.
description: 10 pages, 7 figures
Functional definitions for $q$-analogues of eulerian functions and applications
Creators: name: El-Guindy, Ahmad
name: Mansour, Zeinab
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33D05, 11B65, 39B72

description: We explore a number of functional properties of the $q$-gamma function and a class of its quotients; including the $q$-beta function. We obtain formulas for all higher logarithmic derivatives of these quotients and give precise conditions on their sign. We prove how these and other functional properties, such as the multiplication formula or the asymptotic expansion, together with the fundamental functional equation of the $q$-gamma function uniquely define those functions. We also study reciprocal "relatives" of the fundamental $q$-gamma functional equation, and prove uniqueness of solution results for them. In addition, we also use a reflection formula of Askey to derive expressions relating the classical sine function and the number $π$ to the $q$-gamma function. Throughout we highlight the similarities and differences between the cases $01$.
description: 29 pages
Array-space analysis tools in SCRUM and SCRUM2
Creators: name: De Mey-Frémaux,
Publisher: name: Zenodo
Year: 2023
Subjects: arm
array modes
consistency
ensemble
cmems
scrum
scrum2

description: This .pdf document describes the algebra and methodology involved in the ArM (array modes) toolbox, as implemented for the CMEMS Service Evolution SCRUM and SCRUM2 projects.
Coronal hole picoflare jets are progenitors of both fast and Alfvénic slow solar wind
Creators: name: Chitta, L. P.
name: Huang, Z.
name: D'Amicis, R.
name: Calchetti, D.
name: Zhukov, A. N.
name: Kraaikamp, E.
name: Verbeeck, C.
name: Cuadrado, R. Aznar
name: Hirzberger, J.
name: Berghmans, D.
name: Horbury, T. S.
name: Solanki, S. K.
name: Owen, C. J.
name: Harra, L.
name: Peter, H.
name: Schühle, U.
name: Teriaca, L.
name: Louarn, P.
name: Livi, S.
name: Giunta, A. S.
name: Hassler, D. M.
name: Wang, Y. -M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Solar wind, classified by its bulk speed and the Alfvénic nature of its fluctuations, generates the heliosphere. The elusive physical processes responsible for the generation of the different types of this wind are a topic of active debate. Recent observations reveal intermittent jets, with kinetic energy in the picoflare range, emerging from dark areas of a polar coronal hole threaded by open magnetic field lines. These could substantially contribute to solar wind. However, their ubiquity and direct links to solar wind have not been established. Here, we report a unique set of remote-sensing and in situ observations from the Solar Orbiter spacecraft that establish a unified picture of fast and Alfvénic slow wind, connected to the similar widespread picoflare jet activity in two coronal holes. Radial expansion of coronal holes ultimately regulates the speed of the emerging wind.
description: Published in Astronomy and Astrophysics
Gesangbuch für die dritte Stufe der Primarschule des Kantons Bern
Creators: name: Klee, Hans
Publisher: name: Verlag der Schulbuchhandlung Antenen (W. Kaiser)
Year: 1887

description: im Anschluss an J. R. Weber's Lehrverfahren und unter Mitwirkung der Lehrmittelkommission verfasst von Hans Klee
Optical Proper Motion Measurements of the M87 Jet: New Results from the Hubble Space Telescope
Creators: name: Meyer, Eileen T.
name: Sparks, W. B.
name: Biretta, J. A.
name: Anderson, Jay
name: Sohn, Sangmo Tony
name: van der Marel, Roeland P.
name: Norman, Colin
name: Nakamura, Masanori
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report new results from an HST archival program to study proper motions in the optical jet of the nearby radio galaxy M87. Using over 13 years of archival imaging, we reach accuracies below 0.1c in measuring the apparent velocities of individual knots in the jet. We confirm previous findings of speeds up to 4.5c in the inner 6" of the jet, and report new speeds for optical components in the outer part of the jet. We find evidence of significant motion transverse to the jet axis on the order of 0.6c in the inner jet features, and superluminal velocities parallel and transverse to the jet in the outer knot components, with an apparent ordering of velocity vectors possibly consistent with a helical jet pattern. Previous results suggested a global deceleration over the length of the jet in the form of decreasing maximum speeds of knot components from HST-1 outward, but our results suggest that superluminal speeds persist out to knot C, with large differentials in very nearby features all along the jet. We find significant apparent accelerations in directions parallel and transverse to the jet axis, along with evidence for stationary features in knots D, E, and I. These results are expected to place important constraints on detailed models of kpc-scale relativistic jets.
description: 8 pages, 4 figures, 1 table. Accepted for Publication in the Astrophysical Journal Letters