cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Calorons and monopoles from smeared SU(2) lattice fields at non-zero temperature
Creators: name: Ilgenfritz, E. -M.
name: Martemyanov, B. V.
name: Müller-Preussker, M.
name: Veselov, A. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In equilibrium, at finite temperature below and above the deconfining phase transition, we have generated lattice SU(2) gauge fields and have exposed them to smearing in order to investigate the emerging clusters of topological charge. Analysing in addition the monopole clusters according to the maximally Abelian gauge, we have been able to characterize part of the topological clusters to correspond either to non-static calorons or static dyons in the context of Kraan-van Baal caloron solutions with non-trivial holonomy. We show that the relative abundance of these calorons and dyons is changing with temperature and offer an interpretation as dissociation of calorons into dyons with increasing temperature. The profile of the Polyakov loop inside the topological clusters and the (model-dependent) accumulated topological cluster charges support this interpretation. Above the deconfining phase transition light dyons (according to Kraan-van Baal caloron solutions with almost trivial holonomy) become the most abundant topological objects. They are presumably responsible for the magnetic confinement in the deconfined phase.
description: 11 pages, 7 figures, Paper has been thoroughly revised, 1 section and 1 figure have been added, corresponds to the published version
On the origin of the Epps effect
Creators: name: Toth, Bence
name: Kertesz, Janos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: The Epps effect, the decrease of correlations between stock returns for short time windows, was traced back to the trading asynchronicity and to the occasional lead-lag relation between the prices. We study pairs of stocks where the latter is negligible and confirm the importance of asynchronicity but point out that alone these aspects are insufficient to give account for the whole effect.
description: 7 pages, 4 figures; to appear in the Proceedings of Econophysics Colloquium 2006 References added
Surface acoustic wave photonic devices in silicon on insulator
Creators: name: Munk, Dvir
name: Katzman, Moshe
name: Hen, Mirit
name: Priel, Maayan
name: Feldberg, Moshe
name: Sharabani, Tali
name: Levy, Shahar
name: Bergman, Arik
name: Zadok, Avi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Opto-mechanical interactions in planar photonic integrated circuits draw great interest in basic research and applications. However, opto-mechanics is practically absent in the most technologically significant photonics platform: silicon on insulator. Previous demonstrations required the under-etching and suspension of silicon structures. Here we present surface acoustic wave-photonic devices in silicon on insulator, up to 8 GHz frequency. Surface waves are launched through absorption of modulated pump light in metallic gratings and thermoelastic expansion. The surface waves are detected through photo-elastic modulation of an optical probe in standard race-track resonators. Devices do not involve piezo-electric actuation, suspension of waveguides or hybrid material integration. Wavelength conversion of incident microwave signals and acoustic true time delays up to 40 ns are demonstrated on-chip. Lastly, discrete-time microwave-photonic filters with up to six taps and 20 MHz wide passbands are realized using acoustic delays. The concept is suitable for integrated microwave-photonics signal processing
Infrared up-conversion imaging in nonlinear metasurfaces
Creators: name: Camacho-Morales, Rocio
name: Rocco, Davide
name: Xu, Lei
name: Gili, Valerio Flavio
name: Dimitrov, Nikolay
name: Stoyanov, Lyubomir
name: Ma, Zhonghua
name: Komar, Andrei
name: Lysevych, Mykhaylo
name: Karouta, Fouad
name: Dreischuh, Alexander
name: Tan, Hark Hoe
name: Leo, Giuseppe
name: De Angelis, Costantino
name: Jagadish, Chennupati
name: Miroshnichenko, Andrey E.
name: Rahmani, Mohsen
name: Neshev, Dragomir N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Infrared imaging is a crucial technique in a multitude of applications, including night vision, autonomous vehicles navigation, optical tomography, and food quality control. Conventional infrared imaging technologies, however, require the use of materials like narrow-band gap semiconductors which are sensitive to thermal noise and often require cryogenic cooling. Here, we demonstrate a compact all-optical alternative to perform infrared imaging in a metasurface composed of GaAs semiconductor nanoantennas, using a nonlinear wave-mixing process. We experimentally show the up-conversion of short-wave infrared wavelengths via the coherent parametric process of sum-frequency generation. In this process, an infrared image of a target is mixed inside the metasurface with a strong pump beam, translating the image from infrared to the visible in a nanoscale ultra-thin imaging device. Our results open up new opportunities for the development of compact infrared imaging devices with applications in infrared vision and life sciences.
description: 32 pages, 13 figures
No sustained mean velocity in the boundary region of plane thermal convection
Creators: name: Samuel, Roshan J.
name: Bode, Mathis
name: Scheel, Janet D.
name: Sreenivasan, Katepalli R.
name: Schumacher, Jörg
Publisher: name: arXiv
Year: 2024
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the dynamics of thermal and momentum boundary regions in three-dimensional direct numerical simulations of Rayleigh-Bénard convection for the Rayleigh number range $10^5 \le Ra \le 10^{11}$ and $Pr=0.7$. Using a Cartesian slab with horizontal periodic boundary conditions and an aspect ratio of 4, we obtain statistical homogeneity in the horizontal $x$- and $y$-directions, thus approximating best an extended convection layer relevant for most geo- and astrophysical flow applications. We observe upon canonical use of combined long-time and area averages, with averaging periods of at least 100 free-fall times, that a global coherent mean flow is practically absent and that the magnitude of the velocity fluctuations is larger than the mean by up to 2 orders of magnitude. The velocity field close to the wall is a collection of differently oriented local shear-dominated flow patches interspersed by extensive shear-free incoherent regions which can be as large as the whole cross section, unlike for a closed cylindrical convection cell of aspect ratio of the order 1. The incoherent regions occupy a $60\%$ area fraction for all Rayleigh numbers investigated here. Rather than resulting in a pronounced mean with small fluctuations about such a mean, as found in small-aspect-ratio convection, the velocity field is dominated by strong fluctuations of all three components around a non-existent or weak mean. We discuss the consequences of these observations for convection layers with larger aspect ratios, including boundary layer instabilities and the resulting turbulent heat transport.
description: 18 pages, 10 figures
Vacuum Energy, EoS, and the Gluon Condensate at Finite Baryon Density in QCD
Creators: name: Zhitnitsky, Ariel
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Equation of States (EoS) plays the crucial role in all studies of neutron star properties. Still, a microscopical understanding of EoS remains largely an unresolved problem. We use 2-color QCD as a model to study the dependence of vacuum energy (gluon condensate in QCD) as function of chemical potential μ\ll Λ_{QCD} where we find very strong and unexpected dependence on $μ$. We present the arguments suggesting that similar behavior may occur in 3-color QCD in the color superconducting phases. Such a study may be of importance for analysis of EoS when phenomenologically relevant parameters (within such models as MIT Bag model or NJL model) are fixed at zero density while the region of study lies at much higher densities not available for terrestrial tests.
description: Talk at " Quark Confinement and the Hadron Spectrum VII", Ponta Delgada, September 2-7, 2006
Segregation in desiccated sessile drops of biological fluids
Creators: name: Tarasevich, Yuri Yu.
name: Pravoslavnova, Dina M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: It is shown here that concurrence between advection and diffusion in a drying sessile drop of a biological fluid can produce spatial redistribution of albumen and salt. The result gives an explanation for the patterns observed in the dried drops of the biological fluids.
description: 6 pages, 3 figures; submitted to European Physical Journal E
Conserving the lepton number $L_{e}-L_μ-L_τ$ in the exact solution of a 3-3-1 gauge model with right-handed neutrinos
Creators: name: Palcu, Adrian
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we consider a plausible scenario with conserved lepton number \textbf{$L=L_{e}-L_μ-L_τ$} within the framework of the exact solution of a particular 3-3-1 gauge model. We discuss what are the consequences of conserving this global leptonic symmetry from the viewpoint of the neutrino mass matrix constructed via special Yukawa terms (involving tensor products among Higgs triplets). We prove that the actual experimental data can naturally be reproduced by our scenario since soft breaking terms with respect to this lepton symmetry are properly introduced. As a consequence, our solution predicts for the neutrino sector the correct mass splitting ratio ($Δm_{12}^{2}/Δm_{23}^{2}\simeq0.033$), the inverted mass hierarchy, the correct values for the observed mixing angles ($\sin^{2}θ_{23}\simeq0.5$ and $\sin^{2}θ_{12}=0.31$)and the absolute mass of the lightest neutrino ($m_{0}\sim0.001$eV)independent of the breakung scale of the model.
description: 10 pages, no figures
X-ray properties of the quasar HE0450-2958
Creators: name: Zhou, Xin-Lin
name: Yang, Fang
name: Lv, Xiao-Rong
name: Wang, Jian-Min
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an {\it XMM-Newton} EPIC observation of HE0450-2958 which may be a ``naked''quasar as suggested by Magain et al. The \xmm EPIC spectra show a substantial soft X-ray excess, a steep photon index, as well as marginal evidence for a weak Fe K$α$ line. The X-ray absorption is consistent with the galactic level. The 0.3-10 keV EPIC spectra can be fitted by a power law plus a blackbody model, however, the fit by the relativistically blurred photoionized disc reflection is better. We estimate the black hole mass of $2^{+7}_{-1.3} \times 10^{7} M_{\odot}$ from the X-ray variability. This broadly agrees with the value derived from the optical \hb line width. These results support a high-state Seyfert galaxy of the source. HE0450-2958 shares similar properties of transitionary objects from ultra-luminous infrared galaxies to quasars. We suggest that HE0450-2958 is just in the beginning of an optical quasar window.
description: 23 pages, 8 figures, AJ in press
Angular correlations in pA collisions from CGC: multiplicity and mean transverse momentum dependence of $v_2$
Creators: name: Altinoluk, Tolga
name: Armesto, Néstor
name: Kovner, Alex
name: Lublinsky, Michael
name: Skokov, Vladimir V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within the dense-dilute Color Glass Condensate approach, and using the Golec-Biernat-Wuesthoff model for the dipole scattering amplitude, we calculate $v_2^2$ as well as the correlations between $v_2^2$ and both the total multiplicity and the mean transverse momentum of produced particles. We find that the correlations are generally very small consistent with the observations. We note an interesting sharp change in the value of $v^2_2$ as well as of its correlations as a function of the width of the transverse momentum bin. This crossover is associated with the change from Bose enhancement dominance of the correlation for narrow bin to HBT dominated correlations for larger bin width.
description: 28 pages, 4 figures
"Problems of Purpose, Production and Evaluation of the Conclusion of the Forensic Linguistic Examination of Obscene Vocabulary".
Creators: name: Shoshin, Serguei
Publisher: name: figshare
Year: 2021
Subjects: subject: 220301 Aesthetics
subject: FOS: Philosophy, ethics and religion
subject: 220199 Applied Ethics not elsewhere classified
subject: 220102 Business Ethics
subject: 180104 Civil Law and Procedure
subject: FOS: Law
subject: 180110 Criminal Law and Procedure
subject: Digital Humanities
subject: Language
subject: Law
subject: 189999 Law and Legal Studies not elsewhere classified
subject: 180119 Law and Society
subject: 180199 Law not elsewhere classified
subject: 220105 Legal Ethics
subject: Linguistics
subject: FOS: Languages and literature
subject: Literature
subject: 180123 Litigation, Adjudication and Dispute Resolution
subject: Philosophy
subject: 220399 Philosophy not elsewhere classified
subject: 220313 Philosophy of Language
subject: 220107 Professional Ethics (incl. police and research ethics)

description: Конференция: «Правовые проблемы укрепления российской государственности». Местоположение: (онлайн), Томск, Россия. 30 января - 01 февраля 2020 года. Спикер: Сергей Шошин. Тема доклада: «Проблемы назначения, составления и оценки заключения судебно-лингвистической экспертизы нецензурной лексики». Отчет публикуется в печатном и электронном виде.
On the thermodynamic consistency of Quasi-Linear Viscoelastic models for soft solids
Creators: name: Berjamin, Harold
name: Destrade, Michel
name: Parnell, William J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences
subject: 74D10

description: Originating in the field of biomechanics, Fung's model of quasi-linear viscoelasticity (QLV) is one of the most popular constitutive theories employed to compute the time-dependent relationship between stress and deformation in soft solids. It is one of the simplest models of nonlinear viscoelasticity, based on a time-domain integral formulation. In the present study, we consider the QLV model incorporating a single scalar relaxation function. We provide natural internal variables of state, as well as a consistent expression of the free energy to illustrate the thermodynamic consistency of this version of the QLV model. The thermodynamic formulation highlights striking similarities between QLV and the internal-variable models introduced by Holzapfel and Simo. Finally, the dissipative features of compressible QLV materials are illustrated in simple tension.
Migration and the formation of systems of hot super-Earths and Neptunes
Creators: name: Terquem, Caroline
name: Papaloizou, John C. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The existence of extrasolar planets with short orbital periods suggests that planetary migration induced by tidal interaction with the protoplanetary disk is important. Cores and terrestrial planets may undergo migration as they form. In this paper we investigate the evolution of a population of cores with initial masses in the range 0.1-1 earth mass embedded in a disk. Mutual interactions lead to orbit crossing and mergers, so that the cores grow during their evolution. Interaction with the disk leads to orbital migration, which results in the cores capturing each other in mean motion resonances. As the cores migrate inside the disk inner edge, scatterings and mergers of planets on unstable orbits together with orbital circularization causes strict commensurability to be lost. Near commensurability however is usually maintained. All the simulations end with a population of typically between two and five planets, with masses depending on the initial mass. These results indicate that if hot super-Earths or Neptunes form by mergers of inwardly migrating cores, then such planets are most likely not isolated. We would expect to always find at least one, more likely a few, companions on close and often near-commensurable orbits. To test this hypothesis, it would be of interest to look for planets of a few to about 10 earth masses in systems where hot super-Earths or Neptunes have already been found.
description: 29 pages, to be published in ApJ
Natural Metric-Affine Inflation
Creators: name: Racioppi, Antonio
name: Salvio, Alberto
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider here natural inflation in the low energy (two-derivative) metric-affine theory containing only the minimal degrees of freedom in the inflationary sector, i.e. the massless graviton and the pseudo-Nambu-Goldstone boson (PNGB). This theory contains the Ricci-like and parity-odd Holst invariants together with non-minimal couplings between the PNGB and the above-mentioned invariants. The Palatini and Einstein-Cartan realizations of natural inflation are particular cases of our construction. Explicit models of this type featuring non-minimal couplings are shown to emerge from the microscopic dynamics of a QCD-like theory with an either sub-Planckian or trans-Planckian confining scale and that is renormalizable on Minkowski spacetime. Moreover, for these models, we find regions of the parameter space where the inflationary predictions agree with the most recent observations at the $2σ$ level. We find that in order to enter the $1σ$ region it is necessary (and sufficient) to have a finite value of the Barbero-Immirzi parameter and a sizable non-minimal coupling between the inflaton and the Holst invariant (with sign opposite to the Barbero-Immirzi parameter). Indeed, in this case the potential of the canonically normalized inflaton develops a plateau as shown analytically.
description: v2: 27 pages, 15 figures; analysis extended to include sub-Planckian values of the confining scale f and the running of the tilt, further explanations and references added. v3: 26 pages, 15 figures; sign error in the kinetic function of the inflaton corrected, conclusions unchanged
Magnetic and Mechanical Analysis of Bi-2212 Rutherford Cable in a Cos-Theta Sub-Scale Dipole Coil
Creators: name: D'Agliano, A.
name: Zlobin, A. V.
name: Novitski, I.
name: Turrioni, D.
name: Barzi, E.
name: Donati, S.
name: Giusti, V.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The U.S. Magnet Development Program (US-MDP) explores high-field accelerator magnets compatible with operational conditions beyond the limits of Nb$_3$Sn technology. The ongoing R\&D High-Temperature Superconductors (HTS) suggests using Bi$_2$Sr$_2$CaCu$_2$O$_{8-x}$ (Bi-2212) as superconducting element. Bi-2212 Rutherford cables maintain a high critical current (I$_C$) when exposed to a large external magnetic field. However, Bi-2212 exhibits an oversensitive stress-strain response when subject to large Lorentz forces. This paper reports on the magnetic and mechanical analysis of the Bi-2212 cosine-theta insert being developed at Fermilab for a hybrid magnet composed of two external layers of Nb$_3$Sn and two internal layers of Bi-2212. We performed a FEM analysis of the insert to estimate the HTS stress state in the coil's strands under magnetic and mechanical loads.
Design of Gallium Nitride Resonant Cavity Light Emitting Diodes on Si Substrates
Creators: name: Mastro, Michael A.
name: Caldwell, Joshua D.
name: Holm, Ron T.
name: Henry, Rich L.
name: Eddy, Charles R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: A GaN resonant cavity light emitting diode was built on a GaN-AlN distributed Bragg reflector grown on a silicon substrate. The electroluminescence output increased by 2.5 times for a GaN diode coupled to a properly designed resonant cavity. Theoretical calculations showed that this enhancement could increase up to four times for transmission through a sem-transparent metal contact design, up to eight times for a flip-chip design
Lethbridge City Hall
Creators: name: Kimber, Russell Alan
Publisher: name: University of British Columbia
Year: 2009

description: The project is a new city hall for the city of Lethbridge, Alberta, intended to replace the current building which was outgrown over twenty years ago, forcing several departments and city council to be housed in separate buildings. Past proposals for a new city hall have been confined to the current location in the Civic Centre, located on the periphery of the central business district. The primary objective of this project, however, was to create a city hall that was a successful public building, functioning not only as a setting for civic functions and ceremonies, but also as a place of everyday gatherings and activities that would contribute to the vitality of the city. For this reason a site was chosen downtown, on a block across from Gait Gardens, a park that at one time was the early coal mining settlement's town square. Once the commercial centre of the city, the blocks around Gait Gardens contain many heritage buildings, including the original city hall building. As retail activity moved to other locations the area and the park went into general decline. The block chosen as the site was cleared in 1965 and is currently occupied by a supermarket and a parking lot. In recent years the City of Lethbridge has made plans to reestablish Gait Gardens as the heart of the downtown area. Part of this strategy includes a radical redesign of the park itself which destroys much of its original formal plan. Locating an important public building, like City Hall, adjacent to the park would be a positive contribution to the revival of the area. City offices wrap around a wind-sheltered courtyard and large interior public space in order to fill up the block and to allow the building to come out to the street. The original twenty-five foot lot lines that ran east-west across the site govern the location and dimensions of major building elements. A tower, housing chimes and wind driven panels, marks the ceremonial entrance facing the park. A restaurant and small retail outlet are located along the west side of the building to support activity outside city hall hours. The southeast corner of Gait Gardens is redesigned to become a public plaza. Its main feature is a square reflecting pool and skating rink that corresponds exactly to the dimensions of the city hall courtyard. The park otherwise retains its original character and layout.
One-dimensional description of a Bose-Einstein condensate in a rotating closed-loop waveguide
Creators: name: Schwartz, S.
name: Cozzini, M.
name: Menotti, C.
name: Carusotto, I.
name: Bouyer, P.
name: Stringari, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose a general procedure for reducing the three-dimensional Schrodinger equation for atoms moving along a strongly confining atomic waveguide to an effective one-dimensional equation. This procedure is applied to the case of a rotating closed-loop waveguide. The possibility of including mean-field atomic interactions is presented. Application of the general theory to characterize a new concept of atomic waveguide based on optical tweezers is finally discussed.
Additional file 1 of When first line treatment of neonatal infection is not enough: blood culture and resistance patterns in neonates requiring second line antibiotic therapy in Bangui, Central African Republic
Creators: name: Nebbioso, Andrea
name: Ogundipe, Oluwakemi F.
name: Repetto, Ernestina Carla
name: Mekiedje, Calorine
name: Sanke-Waigana, Hugues
name: Ngaya, Gilles
name: Ingelbeen, Brecht
name: Gil-Cuesta, Julita
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: Computational Biology

description: Additional file 1.
Non-singular inflation with vacuum decay
Creators: name: Carneiro, Saulo
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: On the basis of a semi-classical analysis of vacuum energy in an expanding spacetime, we describe a non-singular cosmological model in which the vacuum density decays with time, with a concomitant production of matter. During an infinitely long period we have an empty, inflationary universe, with H \approx 1. This primordial era ends in a fast phase transition, during which H and Λdecrease to nearly zero in a few Planck times, with release of a huge amount of radiation. The late-time scenario is similar to the standard model, with the radiation phase followed by a long dust era, which tends asymptotically to a de Sitter universe, with vacuum dominating again. An analysis of the redshift-distance relation for supernovas Ia leads to cosmological parameters in agreement with other current estimations.
description: Work presented at IRGAC 2006, Barcelona, July 11-15 2006. To appear in a special issue of Journal of Physics A
Additional file 2 of When first line treatment of neonatal infection is not enough: blood culture and resistance patterns in neonates requiring second line antibiotic therapy in Bangui, Central African Republic
Creators: name: Nebbioso, Andrea
name: Ogundipe, Oluwakemi F.
name: Repetto, Ernestina Carla
name: Mekiedje, Calorine
name: Sanke-Waigana, Hugues
name: Ngaya, Gilles
name: Ingelbeen, Brecht
name: Gil-Cuesta, Julita
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: Computational Biology

description: Additional file 2.
Information divergences and likelihood ratios of Poisson processes and point patterns
Creators: name: Leskelä, Lasse
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistics Theory (math.ST)
subject: Information Theory (cs.IT)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 62B10, 60G55, 94A17

description: This article develops an analytical framework for studying information divergences and likelihood ratios associated with Poisson processes and point patterns on general measurable spaces. The main results include explicit analytical formulas for Kullback-Leibler divergences, Rényi divergences, Hellinger distances, and likelihood ratios of the laws of Poisson point patterns in terms of their intensity measures. The general results yield similar formulas for inhomogeneous Poisson processes, compound Poisson processes, as well as spatial and marked Poisson point patterns. Additional results include simple characterisations of absolute continuity, mutual singularity, and the existence of common dominating measures. The analytical toolbox is based on Tsallis divergences of sigma-finite measures on abstract measurable spaces. The treatment is purely information-theoretic and free of topological assumptions.
description: Typos corrected
Limited validity of the Kubo formula for thermal conduction in modular quantum systems
Creators: name: Gemmer, Jochen
name: Michel, Mathias
name: Steinigeweg, Robin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Kubo formula describes a current as a response to an external field. In the case of heat conduction there is no such external field. We analyze why and to what extend it is nevertheless justified to describe heat conduction in modular quantum systems by the Kubo formula. Modular we call systems that may be described as consisting of weakly coupled identical subsystems. We explain in what sense this description applies to a large class of systems. Furthermore, we numerically evaluate the Kubo formula for some finite modular systems. We compare the results with data obtained from the direct numerical solution of the corresponding time-dependent Schroedinger equation.
description: 11 pages, 10 figures
Properties of amorphous CoZr(RE) (RE=Gd, Sm, Dy) films with various uniaxial anisotropies, prepared by a new process
Creators: name: Shin, D. H
name: Niedoba, H
name: Henry, Y.
name: Machizaud, F
name: Brien, Valerie
name: Chumakov, D
name: Schafer, R
name: Suran, G
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: If a DC magnetic field is applied parallel to the plane of amorphous CoZr(RE) thin films during sputter depositing, a uniaxial anisotropy is formed the direction of which depends upon the choice of RE substituted and its concentration. When RE = Gd a perpendicular anisotropy K, forms over a large concentration range, a spin reorientation process being at the origin of the process. A well-defined K, is developed also in CoFeZrGd and CoZrGdSm films. CoZrGdDy films exhibit simultaneously a perpendicular and an in-plane uniaxial anisotropy. The related magnetization process and domain structures are quite peculiar.
LINGUOCOLOGY (LANGUAGE ECOLOGY): DEVELOPMENT PROSPECTS
Creators: name: Shoshin, Serguei
Publisher: name: figshare
Year: 2021
Subjects: subject: 200401 Applied Linguistics and Educational Linguistics
subject: FOS: Languages and literature
subject: 200304 Central and Eastern European Languages (incl. Russian)
subject: 200509 Central and Eastern European Literature (incl. Russian)
subject: 200101 Communication Studies
subject: FOS: Media and communications
subject: 200102 Communication Technology and Digital Media Studies
subject: 200199 Communication and Media Studies not elsewhere classified
subject: 200322 Comparative Language Studies
subject: 200524 Comparative Literature Studies
subject: 200402 Computational Linguistics
subject: 200204 Cultural Theory
subject: FOS: Other humanities
subject: 200205 Culture, Gender, Sexuality
subject: 200403 Discourse and Pragmatics
subject: 200404 Laboratory Phonetics and Speech Science
subject: 200399 Language Studies not elsewhere classified
subject: 200405 Language in Culture and Society (Sociolinguistics)
subject: 200406 Language in Time and Space (incl. Historical Linguistics, Dialectology)
subject: 209999 Language, Communication and Culture not elsewhere classified
subject: 200407 Lexicography
subject: 200408 Linguistic Structures (incl. Grammar, Phonology, Lexicon, Semantics)
subject: 200499 Linguistics not elsewhere classified
subject: 200599 Literary Studies not elsewhere classified
subject: 200525 Literary Theory
subject: 200105 Organisational, Interpersonal and Intercultural Communication
subject: 200310 Other European Languages
subject: 200212 Screen and Media Culture
subject: 200526 Stylistics and Textual Analysis
subject: 200323 Translation and Interpretation Studies

description: Уделяя значительное внимание общим проблемам экологии в современном обществе, стоит обратить внимание на лингвоэкологию (языковую экологию). Сегодня важно изучить не только проблемное правовое регулирование предельно допустимых показателей загрязнения окружающей среды, но и многочисленные аспекты, связанные с употреблением нецензурной лексики в русском языке.
Dephasing in Fluxonium Qubits from Coherent Quantum Phase Slips
Creators: name: Randeria, Mallika T.
name: Hazard, Thomas M.
name: Di Paolo, Agustin
name: Azar, Kate
name: Hays, Max
name: Ding, Leon
name: An, Junyoung
name: Gingras, Michael
name: Niedzielski, Bethany M.
name: Stickler, Hannah
name: Grover, Jeffrey A.
name: Yoder, Jonilyn L.
name: Schwartz, Mollie E.
name: Oliver, William D.
name: Serniak, Kyle
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Phase slips occur across all Josephson junctions (JJs) at a rate that increases with the impedance of the junction. In superconducting qubits composed of JJ-array superinductors -- such as fluxonium -- phase slips in the array can lead to decoherence. In particular, phase-slip processes at the individual array junctions can coherently interfere, each with an Aharonov--Casher phase that depends on the offset charges of the array islands. These coherent quantum phase slips (CQPS) perturbatively modify the qubit frequency, and therefore charge noise on the array islands will lead to dephasing. By varying the impedance of the array junctions, we design a set of fluxonium qubits in which the expected phase-slip rate within the JJ-array changes by several orders of magnitude. We characterize the coherence times of these qubits and demonstrate that the scaling of CQPS-induced dephasing rates agrees with our theoretical model. Furthermore, we perform noise spectroscopy of two qubits in regimes dominated by either CQPS or flux noise. We find the noise power spectrum associated with CQPS dephasing appears to be featureless at low frequencies and not $1/f$. Numerical simulations indicate this behavior is consistent with charge noise generated by charge-parity fluctuations within the array. Our findings broadly inform JJ-array-design tradeoffs, relevant for the numerous superconducting qubit designs employing JJ-array superinductors.
Ensuring Dataset Quality for Machine Learning Certification
Creators: name: Picard, Sylvaine
name: Chapdelaine, Camille
name: Cappi, Cyril
name: Gardes, Laurent
name: Jenn, Eric
name: Lefèvre, Baptiste
name: Soumarmon, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computation (stat.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: In this paper, we address the problem of dataset quality in the context of Machine Learning (ML)-based critical systems. We briefly analyse the applicability of some existing standards dealing with data and show that the specificities of the ML context are neither properly captured nor taken into ac-count. As a first answer to this concerning situation, we propose a dataset specification and verification process, and apply it on a signal recognition system from the railway domain. In addi-tion, we also give a list of recommendations for the collection and management of datasets. This work is one step towards the dataset engineering process that will be required for ML to be used on safety critical systems.
Additional file 3 of When first line treatment of neonatal infection is not enough: blood culture and resistance patterns in neonates requiring second line antibiotic therapy in Bangui, Central African Republic
Creators: name: Nebbioso, Andrea
name: Ogundipe, Oluwakemi F.
name: Repetto, Ernestina Carla
name: Mekiedje, Calorine
name: Sanke-Waigana, Hugues
name: Ngaya, Gilles
name: Ingelbeen, Brecht
name: Gil-Cuesta, Julita
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: Computational Biology

description: Additional file 3.
Baryon semileptonic decays: the Mexican contribution
Creators: name: Flores-Mendieta, Ruben
name: Martinez, Alfonso
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give a detailed account of the techniques to compute radiative corrections in baryon semileptonic decays developed over the years by Mexican collaborations. We explain how the method works by obtaining an expression for the Dalitz plot of semileptonic decays of polarized baryons including radiative corrections to order ${\mathcal O}(αq/πM_1)$, where $q$ is the four-momentum transfer and $M_1$ is the mass of the decaying baryon. From here we compute the totally integrated spin angular asymmetry coefficient of the emitted baryon and compare its value with other results.
description: 10 pages. Prepared for the Commemorative Volume of the Divison of Particles and Fields of the Mexican Physical Society
Generalized Convexity and Inequalities
Creators: name: Anderson, G. D.
name: Vamanamurthy, M. K.
name: Vuorinen, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33C05; 33C20 (Primary); 26A51 (Secondary)

description: Let R+ = (0,infinity) and let M be the family of all mean values of two numbers in R+ (some examples are the arithmetic, geometric, and harmonic means). Given m1, m2 in M, we say that a function f : R+ to R+ is (m1,m2)-convex if f(m1(x,y)) < or = m2(f(x),f(y)) for all x, y in R+ . The usual convexity is the special case when both mean values are arithmetic means. We study the dependence of (m1,m2)-convexity on m1 and m2 and give sufficient conditions for (m1,m2)-convexity of functions defined by Maclaurin series. The criteria involve the Maclaurin coefficients. Our results yield a class of new inequalities for several special functions such as the Gaussian hypergeometric function and a generalized Bessel function.
description: 17 pages
Topological solitons in highly anisotropic two dimensional ferromagnets
Creators: name: Ivanov, B. A.
name: Merkulov, A. Yu.
name: Stephanovich, V. A.
name: Zaspel, C. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: e study the solitons, stabilized by spin precession in a classical two--dimensional lattice model of Heisenberg ferromagnets with non-small easy--axis anisotropy. The properties of such solitons are treated both analytically using the continuous model including higher then second powers of magnetization gradients, and numerically for a discrete set of the spins on a square lattice. The dependence of the soliton energy $E$ on the number of spin deviations (bound magnons) $N$ is calculated. We have shown that the topological solitons are stable if the number $N$ exceeds some critical value $N_{\rm{cr}}$. For $N < N_{\rm{cr}}$ and the intermediate values of anisotropy constant $K_{\mathrm{eff}} <0.35J$ ($J$ is an exchange constant), the soliton properties are similar to those for continuous model; for example, soliton energy is increasing and the precession frequency $ ω(N)$ is decreasing monotonously with $N$ growth. For high enough anisotropy $K_{\mathrm{eff}} > 0.6 J$ we found some fundamentally new soliton features absent for continuous models incorporating even the higher powers of magnetization gradients. For high anisotropy, the dependence of soliton energy E(N) on the number of bound magnons become non-monotonic, with the minima at some "magic" numbers of bound magnons. Soliton frequency $ω(N)$ have quite irregular behavior with step-like jumps and negative values of $ω$ for some regions of $N$. Near these regions, stable static soliton states, stabilized by the lattice effects, exist.
description: 17 pages
Solving an inverse heat convection problem with an implicit forward operator by using a Projected Quasi-Newton method
Creators: name: Rothermel, Dimitri
name: Schuster, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 35K61, 65M32

description: We consider the quasilinear 1D inverse heat convection problem (IHCP) of determining the enthalpy-dependent heat fluxes from noisy internal enthalpy measurements. This problem arises in the Accelerated Cooling (ACC) process of producing thermomechanically controlled processed (TMCP) heavy plates made of steel. In order to adjust the complex microstructure of the underlying material, the Leidenfrost behavior of the hot surfaces with respect to the application of the cooling fluid has to be studied. Since the heat fluxes depend on the enthalpy and hence on the solution of the underlying initial boundary value problem (IBVP), the parameter-to-solution operator, and thus the forward operator of the inverse problem, can only be defined implicitly. To guarantee well-defined operators, we study two approaches for showing existence and uniqueness of solutions of the IBVP. One approach deals with the theory of pseudomonotone operators and so-called strong solutions in Sobolev-Bochner spaces. The other theory uses classical solutions in Hölder spaces. Whereas the first approach yields a solution under milder assumptions, it fails to show the uniqueness result in contrast to the second approach. Furthermore, we propose a convenient parametrization approach for the nonlinear heat fluxes in order to decouple the parameter-to-solution relation and use an iterative solver based on a Projected Quasi-Newton (PQN) method together with box-constraints to solve the inverse problem. For numerical experiments, we derive the necessary gradient information of the objective functional and use the discrepancy principle as a stopping rule. Numerical tests show that the PQN method outperforms the Landweber method with respect to computing time and approximation accuracy.
description: 28 pages, 8 figures
Multiple series connected to Hoffman's conjecture on multiple zeta values
Creators: name: Fischler, Stéphane
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 33C20, 33C70, 11M06, 11J20, 11J72

description: Recent results of Zlobin and Cresson-Fischler-Rivoal allow one to decompose any suitable $p$-uple series of hypergeometric type into a linear combination (over the rationals) of multiple zeta values of depth at most $p$; in some cases, only the multiple zeta values with 2's and 3's are involved (as in Hoffman's conjecture). In this text, we study the depth $p$ part of this linear combination, namely the contribution of the multiple zeta values of depth exactly $p$. We prove that it satisfies some symmetry property as soon as the $p$-uple series does, and make some conjectures on the depth $p-1$ part of the linear combination when $p=3$. Our result generalizes the property that (very) well-poised univariate hypergeometric series involve only zeta values of a given parity, which is crucial in the proof by Rivoal and Ball-Rivoal that $ζ(2n+1)$ is irrational for infinitely many $n \geq 1$.
description: 26 pages; small modifications
MMSE Channel Estimation in Large-Scale MIMO: Improved Robustness with Reduced Complexity
Creators: name: Bacci, Giacomo
name: D'Amico, Antonio Alberto
name: Sanguinetti, Luca
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Large-scale MIMO systems with a massive number N of individually controlled antennas pose significant challenges for minimum mean square error (MMSE) channel estimation, based on uplink pilots. The major ones arise from the computational complexity, which scales with $N^3$, and from the need for accurate knowledge of the channel statistics. This paper aims to address both challenges by introducing reduced-complexity channel estimation methods that achieve the performance of MMSE in terms of estimation accuracy and uplink spectral efficiency while demonstrating improved robustness in practical scenarios where channel statistics must be estimated. This is achieved by exploiting the inherent structure of the spatial correlation matrix induced by the array geometry. Specifically, we use a Kronecker decomposition for uniform planar arrays and a well-suited circulant approximation for uniform linear arrays. By doing so, a significantly lower computational complexity is achieved, scaling as $N\sqrt{N}$ and $N\log N$ for squared planar arrays and linear arrays, respectively.
description: To appear on IEEE Transactions on Wireless Communications, 11 figures, 3 tables
On the algebraic Bethe ansatz: Periodic boundary conditions
Creators: name: Lima-Santos, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, the algebraic Bethe ansatz with periodic boundary conditions is used to investigate trigonometric vertex models associated with the fundamental representations of the non-exceptional Lie algebras. This formulation allow us to present explicit expressions for the eigenvectors and eigenvalues of the respective transfer matrices.
description: 36 pages, LaTex, Minor Revision
Manipulating Core-Excitations in Molecules by X-ray Cavities
Creators: name: Gu, Bing
name: Nenov, Artur
name: Segatta, Francesco
name: Garavelli, Marco
name: Mukamel, Shaul
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Core-excitations on different atoms are highly localized and therefore decoupled. By placing molecules in an X-ray cavity the core-transitions become coupled via the exchange of cavity photons and form delocalized hybrid light-matter excitations known as core-polaritons. We demonstrate these effects for the two inequivalent carbon atoms in 1,1-difluoroethylene. Polariton signatures in the X-ray absorption, two-photon absorption, and multidimensional four-wave mixing, signals are predicted.
Markovian description of a wide class of feedback-controlled systems: Application to the feedback flashing ratchet
Creators: name: Ruiz-Pino, Natalia
name: Prados, Antonio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In feedback-controlled systems, an external agent -- the feedback controller -- measures the state of the system and modifies its subsequent dynamics depending on the outcome of the measurement. In this paper, we build a Markovian description for the joint stochastic process that comprises both the system and the controller variables. This Markovian description is valid for a wide class of feedback-controlled systems, allowing for the inclusion of errors in the measurement. The general framework is motivated and illustrated with the paradigmatic example of the feedback flashing ratchet.
description: 42 pages, 9 figures; major revision with respect to v1, accepted for publication in JSTAT