cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A $U_A(1)$ symmetry restoration scenario supported by the generalized Witten-Veneziano relation and its analytic solution
Creators: name: Benic, S.
name: Horvatic, D.
name: Kekez, D.
name: Klabucar, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Witten-Veneziano relation, or, alternatively, its generalization proposed by Shore, facilitates understanding and describing the complex of eta and eta' mesons. We present an analytic, closed-form solution to Shore's equations which gives results on the eta-eta' complex in full agreement with results previously obtained numerically. Although the Witten-Veneziano relation and Shore's equations are related, the ways they were previously used in the context of dynamical models to calculate eta and eta' properties, were rather different. However, with the analytic solution, the calculation can be formulated similarly to the approach through the Witten-Veneziano relation, and with some conceptual improvements. In the process, one strengthens the arguments in favor of a possible relation between the U_A(1) and SU_A(3) chiral symmetry breaking and restoration. To test this scenario, the experiments such as those at RHIC, NICA and FAIR, which extend the RHIC (and LHC) high-temperature scans also to the finite-density parts of the QCD phase diagram, should pay particular attention to the signatures from the eta'-eta complex indicating the symmetry restoration.
description: elsarticle style, 6 pages
A «tridentinização» da arquidiocese de Braga. Os sínodos bartolomeanos
Creators: name: Soares, Franquelim Neiva
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 2 (1998): VI centenário da morte do arcebispo D. Lourenço Vicente (1374-1397) | Actas do Colóquio
SlabLU: A Two-Level Sparse Direct Solver for Elliptic PDEs
Creators: name: Yesypenko, Anna
name: Martinsson, Per-Gunnar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The paper describes a sparse direct solver for the linear systems that arise from the discretization of an elliptic PDE on a two dimensional domain. The solver is designed to reduce communication costs and perform well on GPUs; it uses a two-level framework, which is easier to implement and optimize than traditional multi-frontal schemes based on hierarchical nested dissection orderings. The scheme decomposes the domain into thin subdomains, or "slabs". Within each slab, a local factorization is executed that exploits the geometry of the local domain. A global factorization is then obtained through the LU factorization of a block-tridiagonal reduced coefficient matrix. The solver has complexity $O(N^{5/3})$ for the factorization step, and $O(N^{7/6})$ for each solve once the factorization is completed.
 The solver described is compatible with a range of different local discretizations, and numerical experiments demonstrate its performance for regular discretizations of rectangular and curved geometries. The technique becomes particularly efficient when combined with very high-order convergent multi-domain spectral collocation schemes. With this discretization, a Helmholtz problem on a domain of size $1000 λ\times 1000 λ$ (for which $N=100 \mbox{M}$) is solved in 15 minutes to 6 correct digits on a high-powered desktop with GPU acceleration.
Additional file 1 of Systems leadership in practice: thematic insights from three public health case studies
Creators: name: Bigland, Charlotte
name: Evans, David
name: Bolden, Richard
name: Rae, Maggie
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy

description: Additional file 1. System Leadership Case Study Interview Schedule, Prompts used to guide interviews.
Bayesian spline method for assessing extreme loads on wind turbines
Creators: name: Lee, Giwhyun
name: Byon, Eunshin
name: Ntaimo, Lewis
name: Ding, Yu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: This study presents a Bayesian parametric model for the purpose of estimating the extreme load on a wind turbine. The extreme load is the highest stress level imposed on a turbine structure that the turbine would experience during its service lifetime. A wind turbine should be designed to resist such a high load to avoid catastrophic structural failures. To assess the extreme load, turbine structural responses are evaluated by conducting field measurement campaigns or performing aeroelastic simulation studies. In general, data obtained in either case are not sufficient to represent various loading responses under all possible weather conditions. An appropriate extrapolation is necessary to characterize the structural loads in a turbine's service life. This study devises a Bayesian spline method for this extrapolation purpose, using load data collected in a period much shorter than a turbine's service life. The spline method is applied to three sets of turbine's load response data to estimate the corresponding extreme loads at the roots of the turbine blades. Compared to the current industry practice, the spline method appears to provide better extreme load assessment.
description: Published in at http://dx.doi.org/10.1214/13-AOAS670 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Localized patterns in periodically forced systems
Creators: name: Alnahdi, A S
name: Niesen, J
name: Rucklidge, A M
name: Wagenknecht, T
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Spatially localized, time-periodic structures are common in pattern-forming systems, appearing in fluid mechanics, chemical reactions, and granular media. We examine the existence of oscillatory localized states in a PDE model with single frequency time dependent forcing, introduced in [20] as phenomenological model of the Faraday wave experiment. In this study, we reduce the PDE model to the forced complex Ginzburg-Landau equation in the limit of weak forcing and weak damping. This allows us to use the known localized solutions found in [7]. We reduce the forced complex Ginzburg-Landau equation to the Allen-Cahn equation near onset, obtaining an asymptotically exact expression for localized solutions. We also extend this analysis to the strong forcing case recovering Allen-Cahn equation directly without the intermediate step. We find excellent agreement between numerical localized solutions of the PDE, localized solutions of the forced complex Ginzburg-Landau equation, and the Allen-Cahn equation. This is the first time that a PDE with time dependent forcing has been reduced to the Allen-Cahn equation, and its localized oscillatory solutions quantitatively studied. This paper is dedicated to the memory of Thomas Wagenknecht.
Festas urbanas e representação do poder municipal (Braga e Porto na época moderna)
Creators: name: Silva, Francisco Ribeiro Da
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 2 (1998): VI centenário da morte do arcebispo D. Lourenço Vicente (1374-1397) | Actas do Colóquio
Additional file 1 of Psychological characteristics of students in learning clinical interview skills with the use of virtual patient
Creators: name: Zalewski, Bartosz
name: Walkiewicz, Maciej
name: Guziak, Mateusz
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1.
Doubly Intermittent Maps with Critical Points, Unbounded Derivatives and Regularly Varying Tail
Creators: name: Mubarak, Muhammad
name: Schindler, Tanja I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A25, 37A05, 37A50

description: We consider a class of doubly intermittent maps with critical points, unbounded derivative and regularly varying tails. Under some mild assumptions we prove the existence of a unique mixing absolutely continuous invariant measure and give conditions under which the measure is finite. This extends former work by Coates, Luzzatto and Mubarak to maps with regularly varying tails. Particularly, we look at the boundary case where the behaviour of the slowly varying function decides if the invariant measure is finite or infinite.
description: added results and minor changes on the existing results, 23 pages
Braga e o arcebispado no tempo de D. Frei Bartolomeu dos Mártires (1559-1582)
Creators: name: Oliveira, Aurélio De
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 2 (1998): VI centenário da morte do arcebispo D. Lourenço Vicente (1374-1397) | Actas do Colóquio
Molecular Docking Of 2,6-Ditertiarybutyl-1,4-Benzoquinone Hydrazones And Study Of Their Interaction With IsdH Protein
Creators: name: Pangal, Anees
Publisher: name: figshare
Year: 2022
Subjects: subject: Organic Chemistry
subject: FOS: Chemical sciences
subject: Computational Chemistry

description: Molecular Docking Of 2,6-Ditertiarybutyl-1,4-Benzoquinone Hydrazones And Study Of Their Interaction With IsdH Protein
Modeling of ion beam induced charge sharing experiments for the design of high resolution position sensitive detectors
Creators: name: Forneris, Jacopo
name: Jamieson, David
name: Giacomini, Gabriele
name: Yang, Changyi
name: Vittone, Ettore
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: In a multi-electrode device, the motion of free charge carriers generated by ionizing radiation induces currents on all the electrodes surrounding the active region [1]. The amount of charge induced in each sensitive electrode is a function of the device geometry, the transport parameters and the generation profile. Hence this charge sharing effect allows the signal from each sensitive electrode to provide information about the electrical characteristics of the device, as well as information on the location and the profile of each ionization track. The effectiveness of such approach was recently demonstrated in Ion Beam Induced Charge (IBIC) experiments carried out using a 2 MeV He microbeam scanning over a sub-100 lm scale silicon device, where the ion strike location point was evaluated through a comparative analysis of the charge induced in two independent surface electrodes coupled to independent data acquisition systems [2]. In this report, we show that the Monte Carlo method [3] can be efficiently exploited to simulate this IBIC experiment and to model the experimental data, shedding light on the role played by carrier diffusion, electronic noise and ion beam spot size on the induction of charge in the sensitive electrodes. Moreover, the Monte Carlo method shows that information on the ion strike position can be obtained from the charge signals from the sensitive electrodes.
Average degree of the essential variety
Creators: name: Breiding, Paul
name: Fairchild, Samantha
name: Santarsiero, Pierpaola
name: Shehu, Elima
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The essential variety is an algebraic subvariety of dimension $5$ in real projective space $\mathbb R\mathrm P^{8}$ which encodes the relative pose of two calibrated pinhole cameras. The $5$-point algorithm in computer vision computes the real points in the intersection of the essential variety with a linear space of codimension $5$. The degree of the essential variety is $10$, so this intersection consists of 10 complex points in general.
 We compute the expected number of real intersection points when the linear space is random. We focus on two probability distributions for linear spaces. The first distribution is invariant under the action of the orthogonal group $\mathrm{O}(9)$ acting on linear spaces in $\mathbb R\mathrm P^{8}$. In this case, the expected number of real intersection points is equal to $4$. The second distribution is motivated from computer vision and is defined by choosing 5 point correspondences in the image planes $\mathbb R\mathrm P^2\times \mathbb R\mathrm P^2$ uniformly at random. A Monte Carlo computation suggests that with high probability the expected value lies in the interval $(3.95 - 0.05,\ 3.95 + 0.05)$.
description: 18 pages, 2 figures, code included in source files
Censoring heavy-tail count distributions for parameter estimation with an application to stable distributions
Creators: name: Di Noia, Antonio
name: Marcheselli, Marzia
name: Pisani, Caterina
name: Pratelli, Luca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: A new approach based on censoring and moment criterion is introduced for parameter estimation of count distributions when the probability generating function is available even though a closed form of the probability mass function and/or finite moments do not exist.
Evaluating the Plausible Range of N2O Biosignatures on Exo-Earths: An Integrated Biogeochemical, Photochemical, and Spectral Modeling Approach
Creators: name: Schwieterman, Edward W.
name: Olson, Stephanie L.
name: Pidhorodetska, Daria
name: Reinhard, Christopher T.
name: Ganti, Ainsley
name: Fauchez, Thomas J.
name: Bastelberger, Sandra T.
name: Crouse, Jaime S.
name: Ridgwell, Andy
name: Lyons, Timothy W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Nitrous oxide (N2O) -- a product of microbial nitrogen metabolism -- is a compelling exoplanet biosignature gas with distinctive spectral features in the near- and mid-infrared, and only minor abiotic sources on Earth. Previous investigations of N2O as a biosignature have examined scenarios using Earthlike N2O mixing ratios or surface fluxes, or those inferred from Earth's geologic record. However, biological fluxes of N2O could be substantially higher, due to a lack of metal catalysts or if the last step of the denitrification metabolism that yields N2 from N2O had never evolved. Here, we use a global biogeochemical model coupled with photochemical and spectral models to systematically quantify the limits of plausible N2O abundances and spectral detectability for Earth analogs orbiting main-sequence (FGKM) stars. We examine N2O buildup over a range of oxygen conditions (1%-100% present atmospheric level) and N2O fluxes (0.01-100 teramole per year; Tmol = 10^12 mole) that are compatible with Earth's history. We find that N2O fluxes of 10 [100] Tmol yr$^{-1}$ would lead to maximum N2O abundances of ~5 [50] ppm for Earth-Sun analogs, 90 [1600] ppm for Earths around late K dwarfs, and 30 [300] ppm for an Earthlike TRAPPIST-1e. We simulate emission and transmission spectra for intermediate and maximum N2O concentrations that are relevant to current and future space-based telescopes. We calculate the detectability of N2O spectral features for high-flux scenarios for TRAPPIST-1e with JWST. We review potential false positives, including chemodenitrification and abiotic production via stellar activity, and identify key spectral and contextual discriminants to confirm or refute the biogenicity of the observed N2O.
description: 22 pages, 17 figures; ApJ, 937, 109
Nematic Torques in Scalar Active Matter: when Fluctuations Favor Polar Order and Persistence
Creators: name: Spera, Gianmarco
name: Duclut, Charlie
name: Durand, Marc
name: Tailleur, Julien
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the impact of nematic alignment on scalar active matter in the disordered phase. We show that nematic torques control the emergent physics of particles interacting via pairwise forces and can either induce or prevent phase separation. The underlying mechanism is a fluctuation-induced renormalization of the mass of the polar field that generically arises from nematic torques. The correlations between the fluctuations of the polar and nematic fields indeed conspire to increase the particle persistence length, contrary to what phenomenological computations predict. This effect is generic and our theory also quantitatively accounts for how nematic torques enhance particle accumulation along confining boundaries and opposes demixing in mixtures of active and passive particles.
description: 6 pages, 4 figures
The emergence of classical behavior in magnetic adatoms
Creators: name: Delgado, F.
name: Loth, S.
name: Zielinski, M.
name: Fernandez-Rossier, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A wide class of nanomagnets shows striking quantum behavior, known as quantum spin tunneling (QST): instead of two degenerate ground states with opposite magnetizations, a bonding-antibonding pair forms, resulting in a splitting of the ground state doublet with wave functions linear combination of two classically opposite magnetic states, leading to the quenching of their magnetic moment. Here we study how QST is destroyed and classical behavior emerges in the case of magnetic adatoms, as the strength of their coupling, either to the substrate or to each other, is increased. Both spin-substrate and spin-spin coupling renormalize the QST splitting to zero allowing the environmental decoherence to eliminate superpositions between classical states, leading to the emergence of spontaneous magnetization.
description: 5 pages, 4 figures
Additional file 1 of Racial discrimination and health: a prospective study of ethnic minorities in the United Kingdom
Creators: name: Hackett, Ruth A.
name: Ronaldson, Amy
name: Kamaldeep Bhui
name: Steptoe, Andrew
name: Jackson, Sarah E.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Supplementary Table 1. Racial discrimination types and settings by ethnic group. Supplementary Table 2. Associations between racial discrimination and health outcomes (complete cases at wave 3). Supplementary Table 3. Cross-sectional and prospective associations between racial discrimination and health outcomes stratified by ethnic group
Optical atomic clocks
Creators: name: Poli, N.
name: Oates, C. W.
name: Gill, P.
name: Tino, G. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In the last ten years extraordinary results in time and frequency metrology have been demonstrated. Frequency-stabilization techniques for continuous-wave lasers and femto-second optical frequency combs have enabled a rapid development of frequency standards based on optical transitions in ultra-cold neutral atoms and trapped ions. As a result, today's best performing atomic clocks tick at an optical rate and allow scientists to perform high-resolution measurements with a precision approaching a few parts in $10^{18}$. This paper reviews the history and the state of the art in optical-clock research and addresses the implementation of optical clocks in a possible future redefinition of the SI second as well as in tests of fundamental physics.
description: 69 pages, 30 figures, 7 tables
O mosteiro de Tibães no tempo de D. Lourenço Vicente
Creators: name: Dias, Geraldo J. A. Coelho
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 2 (1998): VI centenário da morte do arcebispo D. Lourenço Vicente (1374-1397) | Actas do Colóquio
Um companheiro de D. Lourenço Vicente em Aljubarrota: Pero Lourenço de Távora
Creators: name: Moreno, Humberto Baquero
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 2 (1998): VI centenário da morte do arcebispo D. Lourenço Vicente (1374-1397) | Actas do Colóquio
The emergence of low-frequency dual Fano resonances in chiral twisting metamaterials
Creators: name: Lemkalli, Brahim
name: Kadic, Muamer
name: Badri, Youssef El
name: Guenneau, Sébastien
name: Mir, Abdellah
name: Achaoui, Younes
Publisher: name: arXiv
Year: 2023
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the current work, through a finite element analysis, we demonstrate that a configuration of chiral cells having syndiotactic symmetry provides dual Fano resonances at low frequency. From the phononic dispersion and transmission response, we compare the signature provided by a composite made of chiral cells to the ones of homogeneous medium, isotactic nonchiral, and isotactic chiral beams. The study results in an innovative design of a mechanical metamaterial that induces the Fano resonance at low frequency with a relatively high quality factor. This might be a significant step forward for mechanical wave filtering and detection. Performances have been evaluated using a sensor that will be implemented as a thermometer.
description: 7 pages, 5 figures
High-Harmonic Generation with a twist: all-optical characterization of magic-angle twisted bilayer graphene
Creators: name: Molinero, Eduardo B.
name: Datta, Anushree
name: Calderón, María J.
name: Bascones, Elena
name: Silva, Rui E. F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: If we stack up two layers of graphene while changing their respective orientation by some twisting angle, we end up with a system that has striking differences when compared to single-layer graphene. For a very specific value of this twist angle, known as magic angle, twisted bilayer graphene displays a unique phase diagram that cannot be found in other systems. Recently, high harmonic generation spectroscopy has been successfully applied to elucidate the electronic properties of quantum materials. The purpose of the present work is to exploit the nonlinear optical response of magic-angle twisted bilayer graphene to unveil its electronic properties. We show that the band structure of magic-angle twisted bilayer graphene is imprinted onto its high-harmonic spectrum. Specifically, we observe a drastic decrease of harmonic signal as we approach the magic angle. Our results show that high harmonic generation can be used as a spectroscopy tool for measuring the twist angle and also the electronic properties of twisted bilayer graphene, paving the way for an all-optical characterization of moiré materials.
description: 5 pages, 4 figures
Additional file 1 of Approaches to cervical spine mobilization for neck pain: a pilot randomized controlled trial
Creators: name: Lagoutaris, Claire
name: Sullivan, Justin
name: Hancock, Michelle
name: Leaver, Andrew M.
Publisher: name: figshare
Year: 2020
Subjects: Medicine
Cell Biology
Biotechnology
Science Policy

description: Additional file 1. CONSORT extension for Pilot and Feasibility Trials Checklist.
Compactness of Toeplitz operators with continuous symbols on pseudoconvex domains in $\mathbb{C}^n$
Creators: name: Rodriguez, Tomas Miguel
name: Sahutoglu, Sonmez
Publisher: name: arXiv
Year: 2023
Subjects: subject: Complex Variables (math.CV)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Let $Ω$ be a bounded pseudoconvex domain in $\mathbb{C}^n$ with Lipschitz boundary and $ϕ$ be a continuous function on $\overlineΩ$. We show that the Toeplitz operator $T_ϕ$ with symbol $ϕ$ is compact on the weighted Bergman space if and only if $ϕ$ vanishes on the boundary of $Ω$. We also show that compactness of the Toeplitz operator $T^{p,q}_ϕ$ on $\overline{\partial}$-closed $(p,q)$-forms for $0\leq p\leq n$ and $q\geq 1$ is equivalent to $ϕ=0$ on $Ω$.
description: Final version. Fixed one reference. To appear in Proc. Amer. Math. Soc
Non-scalar Contribution of Potential in Crystals
Creators: name: Uchiyama, H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Ewald-parameter dependence of Coulomb interaction in ionic crystals was studied using a point-charge model. In the presence of the long-range interaction, the ion configuration breaks spherical symmetry of local potential and charge at each ion site, and gives non-scalar contributions to them. This non-scalar potential has similar effects to Heisenberg interaction, while is intrinsically distinct from conventional multipole expansions of the scalar potential. Symmetry and magnitude of the scalar and non-scalar potentials are similar for most materials despite the different definitions, but one exception can be seen in parent materials of hole-doped high-$T_{\mathrm{c}}$ cuprates.
description: 7 pages, 6 figures
Additional file 1 of Evaluation of a pilot immunization curriculum to meet competency training needs of medical residents
Creators: name: Shalansky, Rebecca A.
name: Wu, Margaret
name: Shixin Cindy Shen
name: Furness, Colin
name: Morris, Shaun K.
name: Reynolds, Donna
name: Wong, Tom
name: Pakes, Barry
name: Crowcroft, Natasha
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1.
A study of low-metallicity DLAs at high redshift and C II* as a probe of their physical conditions
Creators: name: Dutta, R.
name: Srianand, R.
name: Rahmani, H.
name: Petitjean, P.
name: Noterdaeme, P.
name: Ledoux, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a detailed high spectral resolution (R $\sim$ 40000) study of five high-z damped Lyman $α$ systems (DLAs) and one sub-DLA detected along four QSO sightlines. Four of these DLAs are very metal-poor with [Fe/H] $\le$ $-$2. One of them, at z$_{abs}$ = 4.20287 towards J0953$-$0504, is the most metal-poor DLA at z $>$ 4 known till date. This system shows no enhancement of C over Fe and O, and standard Population II star yields can explain its relative abundance pattern. The DLA at z$_{abs}$ = 2.34006 towards J0035$-$0918 has been claimed to be the most carbon-enhanced metal-poor DLA. However, we show that thermal broadening is dominant in this system and, when this effect is taken into account, the measured carbon enhancement ([C/Fe] = 0.45 $\pm$ 0.19) becomes $\sim$ 10 times less than what was reported previously. The gas temperature in this DLA is estimated to be in the range of 5000 $-$ 8000 K, consistent with a warm neutral medium phase. From photoionization modelling of two of the DLAs showing C II* absorption, we find that the metagalactic background radiation alone is not sufficient to explain the observed C II* cooling rate, and local heating sources, probably produced by in-situ star formation, are needed. Cosmic ray heating is found to contribute $\gtrsim$ 60% to the total heating in these systems. Using a sample of metal-poor DLAs with C II* measurements, we conclude that the cosmic ray ionization rate is equal to or greater than that seen in the Milky Way in $\sim$ 33% of the systems with C II* detections.
description: 21 pages, 17 figures, 8 tables, Accepted for publication in the MNRAS
Murta, Fátima, Santa Cruz de Timor, Ed. da Autora, Lisboa 1997, 128 pp., 210x145.
Creators: name: Coutinho, Jorge
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
The Comparison of Physical Properties Derived from Gas and Dust in a Massive Star-Forming Region
Creators: name: Battersby, Cara
name: Bally, John
name: Dunham, Miranda
name: Ginsburg, Adam
name: Longmore, Steve
name: Darling, Jeremy
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We explore the relationship between gas and dust in massive star-forming regions by comparing physical properties derived from each. We compare the temperatures and column densities in a massive star-forming Infrared Dark Cloud (IRDC, G32.02+0.05), which shows a range of evolutionary states, from quiescent to active. The gas properties were derived using radiative transfer modeling of the (1,1), (2,2), and (4,4) transitions of NH3 on the Karl G. Jansky Very Large Array (VLA), while the dust temperatures and column densities were calculated using cirrus-subtracted, modified blackbody fits to Herschel data. We compare the derived column densities to calculate an NH3 abundance, 4.6 x 10^-8. In the coldest star-forming region, we find that the measured dust temperatures are lower than the measured gas temperatures (mean and standard deviations T_dust ~ 11.6 +/- 0.2 K vs. T_gas ~ 15.2 +/- 1.5 K), which may indicate that the gas and dust are not well-coupled in the youngest regions (~0.5 Myr) or that these observations probe a regime where the dust and/or gas temperature measurements are unreliable. Finally, we calculate millimeter fluxes based on the temperatures and column densities derived from NH3 which suggest that millimeter dust continuum observations of massive star-forming regions, such as the Bolocam Galactic Plane Survey or ATLASGAL, can probe hot cores, cold cores, and the dense gas lanes from which they form, and are generally not dominated by the hottest core.
description: Accepted by ApJ
Quantum Hitting Time according to a given distribution
Creators: name: Boito, P.
name: Del Corso, G. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81P45, 65F99

description: In this work we focus on the notion of quantum hitting time for discrete-time Szegedy quantum walks, compared to its classical counterpart. Under suitable hypotheses, quantum hitting time is known to be of the order of the square root of classical hitting time: this quadratic speedup is a remarkable example of the computational advantages associated with quantum approaches.
 Our purpose here is twofold. On one hand, we provide a detailed proof of quadratic speedup for time-reversible walks within the Szegedy framework, in a language that should be familiar to the linear algebra community. Moreover, we explore the use of a general distribution in place of the stationary distribution in the definition of quantum hitting time, through theoretical considerations and numerical experiments.
Additional file 1 of The use and perception of support walkers for children with disabilities: a United Kingdom survey
Creators: name: George, Ciaran
name: Levin, Wendy
name: Ryan, Jennifer M.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1: Supplemental Table 1. Prescribers reasoning behind a given duration of use. Supplemental Table 2. Types of support walkers used among prescribers and non-prescribers. Supplemental Table 3. Responses from prescribers regarding the factors that influence which support walker is prescribed and the individuals involved in this decision. Supplemental Table 4. The environments in which support walkers are used, as reported by prescribers and non-prescribers. Supplemental Table 5. Prescribed and actual daily duration of support walker use, as reported by prescribers and non-prescribers. Supplemental Table 6. The duration support walkers are used for within a child’s lifespan, as reported by prescribers and non-prescribers. Supplemental Table 7. Percentage of children for whom their walking ability progresses (e.g. handheld or independent walking) and the factors which affect this.
AA VV., Padre Alberto Azevedo: um Mestre de Cidadania, Ed. da Comissão Promotora da Homenagem, s. l. [Braga], 1997, 144 pp., 235x160.
Creators: name: Arieiro, José
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
Ayape, Eugenio, OAR, Sor Mónica de Jesús y el Padre Cantera. Dos íntimos amigos de Jesús, 2.ª ed., Ediciones Augustinus, Madrid 1986, 368 pp., 210x145, ISBN 84-85096-07-X.
Creators: name: Arieiro, José
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
Gomes, J. Pinharanda, D. Manuel Mendes da Conceição Santos: Vice-Reitor do Seminário da Guarda (1905-1916) e Bispo de Portalegre (1916-1920), Ed. da Vice-Postulação da Causa de Beatificação e Canonização do Servo de Deus, Évora 1996, 296 pp., 230x160.
Creators: name: Arieiro, José
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
Poincaré-Hopf Theorem for Filippov vector fields on 2-dimensional compact manifolds
Creators: name: Casimiro, Joyce A.
name: Martins, Ricardo M.
name: Novaes, Douglas D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Dynamical Systems (math.DS)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 34A36, 37C25, 55M25

description: The Poincaré-Hopf Theorem relates the Euler characteristic of a 2-dimensional compact manifold to the local behavior of smooth vector fields defined on it. However, despite the importance of Filippov vector fields, concerning both their theoretical and applied aspects, until now, it was not known whether this theorem extends to Filippov vector fields. In this paper, we demonstrate that the Poincaré-Hopf Theorem applies to Filippov vector fields defined on 2-dimensional compact manifolds with smooth switching manifolds. As a result, we establish a variant of the Hairy Ball Theorem, asserting that "any Filippov vector field on a sphere with smooth switching manifolds must have at least one singularity (in the Filippov sense) with positive index". This extension is achieved by introducing a new index definition that includes the singularities of Filippov vector fields, such as pseudo-equilibria and tangential singularities. Our work extends the classical index definition for singularities of smooth vector fields to encompass those of Filippov vector fields with smooth switching manifolds. This extension is based on an invariance property under a regularization process, allowing us to establish all classical index properties. We also compute the indices of all generic $Σ$-singularities and some codimension-1 $Σ$-singularities, including fold-fold tangential singularities, regular-cusp tangential singularities, and saddle-node pseudo-equilibria.
description: 27 pages, 4 figures
Extending Noether's theorem by quantifying the asymmetry of quantum states
Creators: name: Marvian, Iman
name: Spekkens, Robert W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Noether's theorem is a fundamental result in physics stating that every symmetry of the dynamics implies a conservation law. It is, however, deficient in several respects: (i) it is not applicable to dynamics wherein the system interacts with an environment, and (ii) even in the case where the system is isolated, if the quantum state is mixed then the Noether conservation laws do not capture all of the consequences of the symmetries. To address these deficiencies, we introduce measures of the extent to which a quantum state breaks a symmetry. Such measures yield novel constraints on state transitions: for nonisolated systems, they cannot increase, while for isolated systems they are conserved. We demonstrate that the problem of finding nontrivial asymmetry measures can be solved using the tools of quantum information theory. Applications include deriving model-independent bounds on the quantum noise in amplifiers and assessing quantum schemes for achieving high-precision metrology.
description: Originally submitted version, Revised version to appear in Nature Communications, 6 pages + 4 pages Supplementary Material
AA Vários, Cuadernos Doctorales - Derecho Canonico, Derecho Eclesiástico del Estado, 13 (1995-1996), excerpta disseriationibus in iure canonico. Centro de Estudos de Direito Canónico, Facultad de Derecho Canonico, Instituto Martin Azpicueta
Creators: name: Silva, Fernando
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
Microlensing and event rate of static spherically symmetric wormhole
Creators: name: Gao, Ke
name: Liu, Lei-Hua
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The study focuses on the impact of microlensing in modern cosmology and introduces a new framework for the static spherically symmetrical wormhole in terms of the radial equation of state. Following a standard procedure, the study calculates the lensing equation, magnification, and event rate based on the the radial equation of state. The analysis highlights that the image problem of the light source is complex. Furthermore, the study suggests that larger values for the throat radius of the wormhole and the radial equation of state lead to higher event rates. Additionally, it is proposed that the event rate of a wormhole will be larger compared to that of a black hole, provided their masses and distances from the light source and observer are comparable. This study offers the potential to distinguish between a wormhole and a black hole under similar conditions.
description: To be published in PLB
Additional file 1 of Evaluation of a multidisciplinary global health online course in Mexico
Creators: name: Carrasco, Héctor
name: Fuentes, Patricia
name: Eguiluz, Itzel
name: Lucio-Ramírez, Cesar
name: Cárdenas, Sandra
name: Barrera, Ilse Mariana Leyva
name: Pérez-Jiménez, Manuel
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 1.
Magnetic Doppler Imaging of He-strong star HD 184927
Creators: name: Yakunin, I.
name: Wade, G.
name: Bohlender, D.
name: Kochukhov, O.
name: Tsymbal, V.
name: Collaborators, MiMeS
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have employed an extensive new timeseries of Stokes I and V spectra obtained with the ESPaDOnS spectropolarimeter at the 3.6-m Canada-France-Hawaii Telescope to investigate the physical parameters, chemical abundance distributions and magnetic field topology of the slowly-rotating He-strong star HD 184927. We infer a rotation period of 9.53071+-0.00120 from H-alpha, H-beta, LSD magnetic measurements and EWs of helium lines. We used an extensive NLTE TLUSTY grid along with the SYNSPEC code to model the observed spectra and find a new value of luminosity. In this poster we present the derived physical parameters of the star and the results of Magnetic Doppler Imaging analysis of the Stokes I and V profiles. Wide wings of helium lines can be described only under the assumption of the presence of a large, very helium-rich spot.
Rubert, Arlindo, História da Igreja no Rio Grande do Sul, Col. ≪Teologia≫ 2, EDIPUCRS, Porto Alegre 1994, 184 pp., 210x140.
Creators: name: Arieiro, José
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
On the universality of void density profiles
Creators: name: Ricciardelli, E.
name: Quilis, V.
name: Varela, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The massive exploitation of cosmic voids for precision cosmology in the upcoming dark energy experiments, requires a robust understanding of their internal structure, particularly of their density profile. We show that the void density profile is insensitive to the void radius both in a catalogue of observed voids and in voids from a large cosmological simulation. However, the observed and simulated voids display remarkably different profile shapes, with the former having much steeper profiles than the latter. Sparsity can not be the main reason for this discrepancy, as we demonstrate that the profile can be recovered with reasonable accuracy even with very sparse samples of tracers. On the other hand, the observed profile shows a significant dependence on the galaxy sample used to trace the matter distribution. Samples including low-mass galaxies lead to shallower profiles with respect to the samples where only massive galaxies are used, as faint galaxies live closer to the void centre. We argue that galaxies are biased tracers when used to probe the matter distribution within voids.
description: 10 pages, 8 figures. Accepted for publication in MNRAS
López de Solís, Fray Luis, Sínodos de Quito 1594 y Loja 1596, Ed. Critica por Fernando Campo del Pozo e Félix Carmona Moreno, Introd. de F. Campo del Pozo, Prologo de Rafael Lazcano Gonzalez, col. ≪Historia Viva≫ 12
Creators: name: Coutinho, Jorge
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
Managing power grids through topology actions: A comparative study between advanced rule-based and reinforcement learning agents
Creators: name: Lehna, Malte
name: Viebahn, Jan
name: Scholz, Christoph
name: Marot, Antoine
name: Tomforde, Sven
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The operation of electricity grids has become increasingly complex due to the current upheaval and the increase in renewable energy production. As a consequence, active grid management is reaching its limits with conventional approaches. In the context of the Learning to Run a Power Network challenge, it has been shown that Reinforcement Learning (RL) is an efficient and reliable approach with considerable potential for automatic grid operation. In this article, we analyse the submitted agent from Binbinchen and provide novel strategies to improve the agent, both for the RL and the rule-based approach. The main improvement is a N-1 strategy, where we consider topology actions that keep the grid stable, even if one line is disconnected. More, we also propose a topology reversion to the original grid, which proved to be beneficial. The improvements are tested against reference approaches on the challenge test sets and are able to increase the performance of the rule-based agent by 27%. In direct comparison between rule-based and RL agent we find similar performance. However, the RL agent has a clear computational advantage. We also analyse the behaviour in an exemplary case in more detail to provide additional insights. Here, we observe that through the N-1 strategy, the actions of the agents become more diversified.
description: 12 pages plus references and appendix, 11 figures, submitted to the journal Energy and AI
Santos, Armando Alexandre dos, O Brasil sob o manto da Imaculada, Artpress, São Paulo, 1996, 80 pp., 170x115, ISBN 85-7206-003-0.
Creators: name: Coutinho, Jorge
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
A Fuzzy Logic-based Cascade Control without Actuator Saturation for the Unmanned Underwater Vehicle Trajectory Tracking
Creators: name: Zhu, Danjie
name: Yang, Simon X.
name: Biglarbegian, Mohammad
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: An intelligent control strategy is proposed to eliminate the actuator saturation problem that exists in the trajectory tracking process of unmanned underwater vehicles (UUV). The control strategy consists of two parts: for the kinematic modeling part, a fuzzy logic-refined backstepping control is developed to achieve control velocities within acceptable ranges and errors of small fluctuations; on the basis of the velocities deducted by the improved kinematic control, the sliding mode control (SMC) is introduced in the dynamic modeling to obtain corresponding torques and forces that should be applied to the vehicle body. With the control velocities computed by the kinematic model and applied forces derived by the dynamic model, the robustness and accuracy of the UUV trajectory without actuator saturation can be achieved.
Additional file 1 of Findings from a three-round Delphi study: essential topics for interprofessional training on complementary and integrative medicine
Creators: name: Homberg, Angelika
name: Klafke, Nadja
name: Loukanova, Svetla
name: Glassen, Katharina
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1:. Supplementary file: Translated questionnaires. 1st – 3rd Delphi rounds.
AA.VV., Ars Brevis. Anuari de la Cátedra Ramon Llull Blanquema 1995, Dir. e apresent. de Dr. Francesc Torralba 1 Rosselló, Universitat Ramon Llull Blanquerna, Barcelona 1996, 263 pp., 230x150, ISSN 1136-3711.
Creators: name: Coutinho, Jorge
Publisher: name: Theologica
Year: 1998

description: Theologica, v. 33 n. 1 (1998): O Espírito, promessa do Pai (Lc 24,49) | Arte hoje na Igreja
Additional file 1 of Evaluating the next generation of RSV intervention strategies: a mathematical modelling study and cost-effectiveness analysis
Creators: name: Hodgson, David
name: Pebody, Richard
name: Panovska-Griffiths, Jasmina
name: Baguelin, Marc
name: Atkins, Katherine E.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: FOS: Biological sciences
subject: Computational Biology

description: Additional file 1. Supplementary methods text.