cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evolution to the Quark-Gluon Plasma
Creators: name: Fukushima, Kenji
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Theoretical studies on the early-time dynamics in the ultra-relativistic heavy-ion collisions are reviewed including pedagogical introductions on the initial condition with small-x gluons treated as a color glass condensate, the bottom-up thermalization scenario, plasma/glasma instabilities, basics of some formulations such as the kinetic equations and the classical statistical simulation. More detailed discussions follow to make an overview of recent developments on the fast isotropization, the onset of hydrodynamics, and the transient behavior of momentum spectral cascades.
description: 46 pages, submitted to RoPP Key Issue Review; references added for early works related to aHydro, typos corrected
Recent developments in the taxonomy, phylogeny and the exploitation of biologically active secondary metabolites of the Hypoxylaceae and other families of the Xylariales
Creators: name: Stadler, Marc
Publisher: name: Zenodo
Year: 2023

description: Keynote lecture at the DGfM conference, Lehesten, Thuringia, Germany on 20 September 2023 summarizing the latest research about Xylariales that was also funded in part by Mycobiomics
Fast and anomalous exciton diffusion in two-dimensional hybrid perovskites
Creators: name: Ziegler, Jonas D.
name: Zipfel, Jonas
name: Meisinger, Barbara
name: Menahem, Matan
name: Zhu, Xiangzhou
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Yaffe, Omer
name: Egger, David A.
name: Chernikov, Alexey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Two-dimensional hybrid perovskites are currently in the spotlight of condensed matter and nanotechnology research due to their intriguing optoelectronic and vibrational properties with emerging potential for light-harvesting and -emitting applications. While it is known that these natural quantum wells host tightly bound excitons, the mobilities of these fundamental optical excitations at the heart of the optoelectronic applications are still largely unexplored. Here, we directly monitor the diffusion of excitons through ultrafast emission microscopy from liquid helium to room temperature in hBN-encapsulated two-dimensional hybrid perovskites. We find very fast diffusion with characteristic hallmarks of free exciton propagation for all temperatures above 50 K. In the cryogenic regime we observe nonlinear, anomalous behavior with an exceptionally rapid expansion of the exciton cloud followed by a very slow and even negative effective diffusion. We discuss our findings in view of efficient exciton-phonon coupling, highlighting two-dimensional hybrids as promising platforms for many-body physics research and optoelectronic applications on the nanoscale.
Nanoscale Field Effect Optical Modulators Based on Depletion of Epsilon-Near-Zero Films
Creators: name: Lu, Zhaolin
name: Yin, Peichuan
name: Shi, Kaifeng
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The field effect in metal-oxide-semiconductor (MOS) capacitors plays a key role in field-effect transistors (FETs), which are the fundamental building blocks of modern digital integrated circuits. Recent works show that the field effect can also be used to make optical/plasmonic modulators. In this paper, we report field effect electro-absorption modulators (FEOMs) each made of an ultrathin epsilon-near-zero (ENZ) film, as the active material, sandwiched in a silicon or plasmonic waveguide. Without a bias, the ENZ film maximizes the attenuation of the waveguides and the modulators work at the OFF state; contrariwise, depletion of the carriers in the ENZ film greatly reduces the attenuation and the modulators work at the ON state. The double capacitor gating scheme is used to enhance the modulation by the field effect. According to our simulation, extinction ratio up to 3.44 dB can be achieved in a 500-nm long Si waveguide with insertion loss only 0.71 dB (85.0%); extinction ratio up to 7.86 dB can be achieved in a 200-nm long plasmonic waveguide with insertion loss 1.11 dB (77.5%). The proposed modulators may find important applications in future on-chip or chip-to-chip optical interconnection.
description: 9 pages, 4 figures
A Comprehensible Review: Magnonic Magnetoelectric Coupling in Ferroelectric/ Ferromagnetic Composites
Creators: name: Chotorlishvili, Levan
name: Jia, Chenglong
name: Rata, Diana A.
name: Brandt, Liane
name: Woltersdorf, Georg
name: Berakdar, Jamal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Composite materials consisting of coupled magnetic and ferroelectric layers hold the promise for new emergent properties such as controlling magnetism with electric fields. Obviously, the interfacial coupling mechanism plays a crucial role and its understanding is the key for exploiting this material class for technological applications. This short review is focused on the magnonic-based magnetoelectric coupling that forms at the interface of a metallic ferromagnet with a ferroelectric insulator. After analyzing the physics behind this coupling, the implication for the magnetic, transport, and optical properties of these composite materials is discussed. Furthermore, examples for the functionality of such interfaces are illustrated by the electric field controlled transport through ferroelectric/ferromagnetic tunnel junctions, the electrically and magnetically controlled optical properties, and the generation of electromagnon solitons for the use as reliable information carriers.
description: Physica Status Solidi B 1, 1900750 (2020)
Bounds and extremal domains for Robin eigenvalues with negative boundary parameter
Creators: name: Antunes, Pedro R. S.
name: Freitas, Pedro
name: Krejcirik, David
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present some new bounds for the first Robin eigenvalue with a negative boundary parameter. These include the constant volume problem, where the bounds are based on the shrinking coordinate method, and a proof that in the fixed perimeter case the disk maximises the first eigenvalue for all values of the parameter. This is in contrast with what happens in the constant area problem, where the disk is the maximiser only for small values of the boundary parameter. We also present sharp upper and lower bounds for the first eigenvalue of the ball and spherical shells. These results are complemented by the numerical optimisation of the first four and two eigenvalues in 2 and 3 dimensions, respectively, and an evaluation of the quality of the upper bounds obtained. We also study the bifurcations from the ball as the boundary parameter becomes large (negative).
description: 26 pages, 20 figures
Padé Approximant and Minimax Rational Approximation in Standard Cosmology
Creators: name: Zaninetti, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The luminosity distance in the standard cosmology as given by $Λ$CDM and consequently the distance modulus for supernovae can be defined by the Padé approximant. A comparison with a known analytical solution shows that the Padé approximant for the luminosity distance has an error of $4\%$ at redshift $= 10$. A similar procedure for the Taylor expansion of the luminosity distance gives an error of $4\%$ at redshift $=0.7 $; this means that for the luminosity distance, the Padé approximation is superior to the Taylor series. The availability of an analytical expression for the distance modulus allows applying the Levenberg--Marquardt method to derive the fundamental parameters from the available compilations for supernovae. A new luminosity function for galaxies derived from the truncated gamma probability density function models the observed luminosity function for galaxies when the observed range in absolute magnitude is modeled by the Padé approximant. A comparison of $Λ$CDM with other cosmologies is done adopting a statistical point of view.
description: 11 figures , 24 pages
The point spread function in interferometric scattering microscopy (iSCAT). I. Aberrations in defocusing and axial localization
Creators: name: Mahmoodabadi, Reza Gholami
name: Taylor, Richard W.
name: Kaller, Martin
name: Spindler, Susann
name: Sandoghdar, Vahid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Interferometric scattering (iSCAT) microscopy is an emerging label-free technique optimized for the sensitive detection of nano-matter. Previous iSCAT studies have approximated the point spread function in iSCAT by a Gaussian intensity distribution. However, recent efforts to track the mobility of nanoparticles in challenging speckle environments and over extended axial ranges has necessitated a quantitative description of the interferometric point spread function (iPSF). We present a robust vectorial diffraction model for the iPSF in tandem with experimental measurements and rigorous FDTD simulations. We examine the iPSF under various imaging scenarios to understand how aberrations due to the experimental configuration encode information about the nanoparticle. We show that the lateral shape of the iPSF can be used to achieve nanometric three-dimensional localization over an extended axial range on the order of 10$\,μ$m either by means of a fit to an analytical model or calibration-free unsupervised machine learning. Our results have immediate implications for three-dimensional single particle tracking in complex scattering media.
A self-sustaining process theory for uniform momentum zones and internal shear layers in high Reynolds number shear flows
Creators: name: Montemuro, Brandon
name: White, Christopher M.
name: Klewicki, Joseph C.
name: Chini, Gregory P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Many exact coherent states (ECS) arising in wall-bounded shear flows have an asymptotic structure at extreme Reynolds number Re in which the effective Reynolds number governing the streak and roll dynamics is O(1). Consequently, these viscous ECS are not suitable candidates for quasi-coherent structures away from the wall that necessarily are inviscid in the mean. Specifically, viscous ECS cannot account for the singular nature of the inertial domain, where the flow self-organizes into uniform momentum zones (UMZs) separated by internal shear layers and the instantaneous streamwise velocity develops a staircase-like profile. In this investigation, a large-Re asymptotic analysis is performed to explore the potential for a three-dimensional, short streamwise- and spanwise-wavelength instability of the embedded shear layers to sustain a spatially-distributed array of much larger-scale, effectively inviscid streamwise roll motions. In contrast to other self-sustaining process theories, the rolls are sufficiently strong to differentially homogenize the background shear flow, thereby providing a mechanistic explanation for the formation and maintenance of UMZs and interlaced shear layers that respects the leading-order balance structure of the mean dynamics.
The Global Landscape of Neural Networks: An Overview
Creators: name: Sun, Ruoyu
name: Li, Dawei
name: Liang, Shiyu
name: Ding, Tian
name: Srikant, R
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: One of the major concerns for neural network training is that the non-convexity of the associated loss functions may cause bad landscape. The recent success of neural networks suggests that their loss landscape is not too bad, but what specific results do we know about the landscape? In this article, we review recent findings and results on the global landscape of neural networks. First, we point out that wide neural nets may have sub-optimal local minima under certain assumptions. Second, we discuss a few rigorous results on the geometric properties of wide networks such as "no bad basin", and some modifications that eliminate sub-optimal local minima and/or decreasing paths to infinity. Third, we discuss visualization and empirical explorations of the landscape for practical neural nets. Finally, we briefly discuss some convergence results and their relation to landscape results.
description: 16 pages. 8 figures
Discontinuous Galerkin methods on graphics processing units for nonlinear hyperbolic conservation laws
Creators: name: Fuhry, Martin
name: Giuliani, Andrew
name: Krivodonova, Lilia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Mathematical Software (cs.MS)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We present a novel implementation of the modal discontinuous Galerkin (DG) method for hyperbolic conservation laws in two dimensions on graphics processing units (GPUs) using NVIDIA's Compute Unified Device Architecture (CUDA). Both flexible and highly accurate, DG methods accommodate parallel architectures well as their discontinuous nature produces element-local approximations. High performance scientific computing suits GPUs well, as these powerful, massively parallel, cost-effective devices have recently included support for double-precision floating point numbers. Computed examples for Euler equations over unstructured triangle meshes demonstrate the effectiveness of our implementation on an NVIDIA GTX 580 device. Profiling of our method reveals performance comparable to an existing nodal DG-GPU implementation for linear problems.
description: 36 pages, 14 figures, 6 tables
On convergence of form factor expansions in the infinite volume quantum Sinh-Gordon model in 1+1 dimensions
Creators: name: Kozlowski, K. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: This paper develops a technique allowing one to prove the convergence of a class of series of multiple integrals which corresponds to the form factor expansion of two-point functions in the 1+1 dimensional massive integrable Sinh-Gordon quantum field theory.
description: 81 pages 5 figures, V2, minor misprints corrected, V3 proof given more detail, missprints corrected
The Continuing Story of SN IIb 2013df: New Optical and IR Observations and Analysis
Creators: name: Szalai, Tamás
name: Vinkó, József
name: Nagy, Andrea P.
name: Silverman, Jeffrey M.
name: Wheeler, J. Craig
name: Dhungana, Govinda
name: Marion, G. Howie
name: Kehoe, Robert
name: Fox, Ori D.
name: Sárneczky, Krisztián
name: Marschalkó, Gábor
name: Bíró, Barna I.
name: Borkovits, Tamás
name: Hegedüs, Tibor
name: Szakáts, Róbert
name: Ferrante, Farley V.
name: Bányai, Evelin
name: Hodosán, Gabriella
name: Kelemen, János
name: Pál, András
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: SN 2013df is a nearby Type IIb supernova that seems to be the spectroscopic twin of the well-known SN 1993J. Previous studies revealed many, but not all interesting properties of this event. Our goal was to add new understanding of both the early and late-time phases of SN 2013df. Our spectral analysis is based on 6 optical spectra obtained with the 9.2m Hobby-Eberly Telescope during the first month after explosion, complemented by a near-infrared spectrum. We applied the SYNAPPS spectral synthesis code to constrain the chemical composition and physical properties of the ejecta. A principal result is the identification of "high-velocity" He I lines in the early spectra of SN 2013df, manifest as the blue component of the double-troughed profile at ~5650 A. This finding, together with the lack of clear separation of H and He lines in velocity space, indicates that both H and He features form at the outer envelope during the early phases. We also obtained ground-based BVRI and g'r'i'z' photometric data up to +45 days and unfiltered measurements with the ROTSE-IIIb telescope up to +168 days. From the modelling of the early-time quasi-bolometric light curve, we find $M_{ej} \sim 3.2-4.6 M_{\odot}$ and $E_{kin} \sim 2.6-2.8 \times 10^{51}$ erg for the initial ejecta mass and the initial kinetic energy, respectively, which agree well with the values derived from the separate modelling of the light-curve tail. Late-time mid-infrared excess indicates circumstellar interaction starting ~1 year after explosion, in accordance with previously published optical, X-ray, and radio data.
description: 24 pages, 13 figures, 9 tables; accepted for publication in MNRAS
Nuclear magnetic relaxation rates of unconventional superconductivity in doped topological insulators
Creators: name: Nagai, Yuki
name: Ota, Yukihiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the temperature dependence of nuclear magnetic relaxation (NMR) rates to detect a sign of topological superconductivity in doped topological insulators, such as $M$($=$Cu,Nb,Sr)$_{x}$Bi$_{2}$Se$_{3}$ and Sn$_{1-x}$In$_{x}$Te. The Hebel-Slichter coherence effect below a critical temperature Tc depends on the superconducting states predicted by a minimal model of doped topological insulators. In a nodal anisotropic topological state similar to the ABM-phase in $^{3}$He, the NMR rate has a conventional $s$-wave like coherence peak below Tc. In contrast, in a fully-gapped isotropic topological superconducting state, this rate below Tc exhibits an anti-peak profile. Moreover, in a two-fold in-plane anisotropic topological superconducting state, there is no coherence effect, which is similar to that in a chiral $p$-wave state. Thus, we reveal that the NMR rates shed light on unconventional superconductivity in doped topological insulators.
description: 8 pages, 3 figures
Dilatancy in dense suspensions of model hard-sphere-like colloids under shear and extensional flow
Creators: name: Andrade, Ricardo J. E.
name: Jacob, Alan R.
name: Galindo-Rosales, Francisco J.
name: Campo-Deapo, Laura
name: Huang, Qian
name: Hassager, Ole
name: Petekidis, George
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Dense suspensions of model hard-sphere-like colloids, with different particle sizes, are examined experimentally in the glass state, under shear and extensional rheology. Under steady shear flow we detect Discontinuous Shear Thickening (DST) above a critical shear rate. Start-up shear experiments show stress overshoots in the vicinity of the onset of DST related with a change in microscopic morphology, as the sample shows dilatancy effects. The analysis of the normal stress together with direct sample observation by high speed camera, indicates the appearance of positive N1 and dilation behavior at the shear thickening onset. Dilatancy effects are detected also under extensional flow. The latter was studied through capillary breakup and filament stretching experimental setups, where liquid-like response is seen for strain rate lower than a critical strain rate and solid like-behavior for higher strain rates. Monitoring the filament thinning processes under different conditions (volume fractions and strain rates) we have created a state diagram where all responses of a hard-sphere suspension (Newtonian, shear thinning, shear thickening, dilatant) are shown. We finally compare the shear thickening response of these hard-sphere-like suspensions and glasses in shear with that in extensional flow.
Introducing the Insider Incident Data Exchange Standard (IIDES)
Creators: name: Whisnant, Austin
Publisher: name: Carnegie Mellon University
Year: 2025
Subjects: classificationCode: 4612
subject: Software engineering

description: Recent research indicates that organizational insiders perpetrate 35 percent of data breaches, and malicious insider incidents cost organizations an average of $701,500 annually. The study and management of insider threat and risk remain areas of increasingly growing attention, prevalence, and concern, but capturing and sharing information about insider incidents in a standardized way has been a challenge for practitioners. A standard of incident classification and information sharing could allow practitioners to build, maintain, deidentify, and share insider threat case data with an eye toward building more robust data for analysis and insights that benefit their organizations and the whole community. In this blog post from the Carnegie Mellon University Software Engineering Institute, we introduce the Insider Incident Data Exchange Standard (IIDES) schema for insider incident data collection, provide an example use case, and invite you to collaborate with us on its development.
[B.7.09.a.] Des chômeurs de Montreuil, Stains et Drancy / Des travailleurs d’Idéal Standard d’Aulnay-sous-Bois / Sur le chantier de la caserne de la gendarmerie mobile du fort d’Aubervilliers / Chez Rateau à la Courneuve / Coq-France à Pantin / Des travailleuses de la Sécurité sociale de Saint-Denis.
Creators: name: Diard, Jean
name: Bidou, Jacques (1945-....)
Publisher: name: École des Hautes Études en Sciences Sociales; Uni/Ci/Té
Year: 2023
Subjects: http://www.idref.fr/050613995/id
http://www.idref.fr/034705074/id
http://www.idref.fr/027261468/id

Abstract
Fine structure of perturbed Laguerre-Gaussian beams: Hermite-Gaussian mode spectra and topological charge
Creators: name: Volyar, A.
name: Abramochkin, E.
name: Egorov, Yu.
name: Bretsko, M.
name: Akimova, Ya.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: I.0
subject: 39-02

description: We found that small perturbations of the optical vortex core in the Laguerre-Gaussian (LG) beams generate a fine structure of the Hermite-Gauss (HG) mode spectrum. Such perturbations can be easily simulated by weak variations of amplitudes and phases of the HG modes in the expansion of the LG beam field. We also theoretically substantiated and experimentally implemented a method for measuring the topological charge of LG beams with an arbitrary number of ring dislocations. Theoretical discussion and experimental studies were accompanied by simple examples of estimating the orbital angular momentum and the topological charge of perturbed LG beams.
description: 16 pages, 7 figures
CHIMPS: the $^{13}$CO/C$^{18}$O (J=3-2) Heterodyne Inner Milky Way Plane Survey
Creators: name: Rigby, A. J.
name: Moore, T. J. T.
name: Plume, R.
name: Eden, D. J.
name: Urquhart, J. S.
name: Thompson, M. A.
name: Mottram, J. C.
name: Brunt, C. M.
name: Butner, H. M.
name: Dempsey, J. T.
name: Gibson, S. J.
name: Hatchell, J.
name: Jenness, T.
name: Kuno, N.
name: Longmore, S. N.
name: Morgan, L. K.
name: Polychroni, D.
name: Thomas, H.
name: White, G. J.
name: Zhu, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the $^{13}$CO/C$^{18}$O (J=3-2) Heterodyne Inner Milky Way Plane Survey (CHIMPS) which has been carried out using the Heterodyne Array Receiver Program on the 15 m James Clerk Maxwell Telescope (JCMT) in Hawaii. The high-resolution spectral survey currently covers |b| < 0.5 deg and 28 < l < 46 deg, with an angular resolution of 15 arcsec in 0.5 km/s velocity channels. The spectra have a median rms of $\sim$ 0.6 K at this resolution, and for optically thin gas at an excitation temperature of 10 K, this sensitivity corresponds to column densities of $N_{\mathrm{H}_{2}} \sim 3 \times 10^{20}\,$cm$^{-2}$ and $N_{\mathrm{H}_{2}} \sim 4 \times 10^{21}\,$cm$^{-2}$ for $^{13}$CO and C$^{18}$O, respectively. The molecular gas that CHIMPS traces is at higher column densities and is also more optically thin than in other publicly available CO surveys due to its rarer isotopologues, and thus more representative of the three-dimensional structure of the clouds. The critical density of the J=3-2 transition of CO is $\gtrsim 10^{4}$ cm$^{-3}$ at temperatures of $\leq 20$ K, and so the higher density gas associated with star formation is well traced. These data complement other existing Galactic plane surveys, especially the JCMT Galactic Plane Survey which has similar spatial resolution and column density sensitivity, and the Herschel infrared Galactic Plane Survey. In this paper, we discuss the observations, data reduction and characteristics of the survey, presenting integrated emission maps for the region covered. Position-velocity diagrams allow comparison with Galactic structure models of the Milky Way, and while we find good agreement with a particular four arm model, there are some significant deviations.
description: Accepted by MNRAS, 15 pages, 9 figures
AN INTEGRATED FRAMEWORK FOR HUMAN HEALTH RISK ASSESSMENT- A REVIEW
Creators: name: Fayshal, Md. Atik
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 401102
subject: Environmentally sustainable engineering

description: A health risk assessment (also referred to as a health risk appraisal and health & well-being assessment) is a questionnaire about a person's medical history, demographic characteristics and lifestyle. It is one of the most widely used screening tools in the field of health promotion and is often the first step in multi-component health promotion programs. Human Health Risk Assessment (HHRA) has five components which include Identify hazards, assess the risks, control the risks, record your findings, review the controls. Ultimately, the insights produced through scientific risk assessment can only guide us in defining the options and making appropriate risk decisions. Comprehensive and sound principles are critical to providing structure and integrity to risk management frameworks. Guiding principles provide an ethical grounding for considering the many factors involved in risk management decision making. However, the application of these principles will require both flexibility and practical judgement. The study is based on critical review of existing literatures from the global perspective.
From geodesic flow on a surface of negative curvature to electronic generator of robust chaos
Creators: name: Kuznetsov, Sergey P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 37D45, 37D20, 34D08, 32Q05, 53B50

description: Departing from the geodesic flow on a surface of negative curvature as a classic example of the hyperbolic chaotic dynamics, we propose an electronic circuit operating as a generator of rough chaos. Circuit simulation in NI Multisim software package and numerical integration of the model equations are provided. Results of computations (phase trajectories, time dependences of variables, Lyapunov exponents and Fourier spectra) show good correspondence between the chaotic dynamics on the attractor of the proposed system and of the Anosov dynamics for the original geodesic flow.
description: 6 pages, 6 figures
Diapria scotti Kieffer 1912
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Chalcididae
Diapria
Diapria scotti

description: Diapria scotti Kieffer, 1912a: 71, 72.
Valid name
Trichopria scotti (Kieffer, 1912).
Summary of types
Lectotype ♂, BMNH number 9.700, designated by Huggert (1979). Paralectotype ♀.
Primary type data
67; Diapria / scotti/ J.J.Kieffer/ type; Mahe, ‘08-9./ Seychelles Exp.; Type; Type/ H.T.; Seychelle Islands./ Percy Sladen Trust/ Expedition./ 1913-170; Lectotypus / Diapria ♂ / scotti Kieff. / design./ L.Huggert-76.
Type locality
Seychelles, Mahé, nr. Morne Blanc.
Remarks
The holotype label on the lectotype is erroneous as Kieffer did not designate a holotype. The lectotype is mounted on a card and has the right hind wing missing and the left antenna and left wings on a microslide on the same pin.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on page 78, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
Progress in Many Body Theory with the Equation of Motion method. Time dependent Density Matrix meets Self-Consistent RPA. Applications to solvable Models
Creators: name: Schuck, Peter
name: Tohyama, Mitsuru
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Bogoliubov-Born-Green-Kirkwood-Yvon or Time-Dependent Density Matrix (TDDM) hierarchy of equations for higher density matrices is truncated at the three body level in approximating the three body correlation function by a quadratic form of two body ones, closing the equations in this way. The procedure is discussed in detail and it is shown in non-trivial model cases that the approximate inclusion of three body correlation functions is very important to obtain precise results. A small amplitude approximation of this time dependent nonlinear equation for the two body correlation function is performed (STDDM*-b) and it is shown that the one body sector of this generalised non-linear second RPA equation is equivalent to the Self-Consistent RPA (SCRPA) approach which had been derived previously by different techniques. It is discussed in which way SCRPA also contains the three body correlations. TDDM and SCRPA are tested versus exactly solvable model cases.
description: 27 pages, 14 figures
Filipino Use of Designer and Luxury Perfumes: A Pilot Study of Consumer Behavior
Creators: name: Miranda, John Paul P.
name: Cruz, Maria Anna D.
name: Gonzales, Dina D.
name: Del Rosario, Ma. Rebecca G.
name: Canlas, Aira May B.
name: Bansil, Joseph Alexander
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: This study investigates the usage patterns and purposes of designer perfumes among Filipino consumers, employing purposive and snowball sampling methods as non-probability sampling techniques. Data was collected using Google Forms, and the majority of respondents purchased full bottles of designer perfumes from retailers, wholesalers, and physical stores, with occasional "blind purchases." Daily usage was common, with respondents applying an average of 5.88 sprays in the morning, favoring fresh scent notes and Eau De Parfum concentration. They tended to alternate perfumes daily, selecting different scent profiles according to the Philippine climate. The study reveals that Filipino respondents primarily use designer perfumes to achieve a pleasant and fresh fragrance. Additionally, these perfumes play a role in boosting self-esteem, elevating mood, and enhancing personal presentation. Some respondents reported fewer common applications, such as using perfume to address insomnia and migraines. Overall, the research highlights the significant role of perfume in the grooming routine of Filipino consumers. This study represents the first attempt to comprehend perfume usage patterns and purposes specifically within the Filipino context. Consequently, its findings are invaluable for manufacturers and marketers targeting the Filipino market, providing insights into consumer preferences and motivations.
description: 14 pages, 4 tables, journal article, peer-reviewed
Gintropy: Gini index based generalization of Entropy
Creators: name: Biró, Tamás S.
name: Néda, Zoltán
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Entropy is being used in physics, mathematics, informatics and in related areas to describe equilibration, dissipation, maximal probability states and optimal compression of information. The Gini index on the other hand is an established measure for social and economical inequalities in a society. In this paper we explore the mathematical similarities and connections in these two quantities and introduce a new measure that is capable to connect these two at an interesting analogy level. This supports the idea that a generalization of the Gibbs--Boltzmann--Shannon entropy, based on a transformation of the Lorenz curve, can properly serve in quantifying different aspects of complexity in socio- and econo-physics.
description: 13 pages, 3 Figures
Thermal entanglement and correlated coherence in two coupled double quantum dots systems
Creators: name: Filgueiras, Cleverson
name: Rojas, Onofre
name: Rojas, Moises
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we investigate the thermal quantum correlations in two coupled double semiconductor charge qubits. This is carried out by deriving analytical expressions for both the thermal concurrence and the correlated coherence. We study, in detail, the effects of the tunneling parameters, the Coulomb interaction and the temperature on the thermal entanglement and on the correlated coherence. It is found that the Coulomb potential plays an important role in the thermal entanglement and in the correlated coherence of the system. The results also indicate that the Coulomb potential can be used for significant enhancement of the thermal entanglement and quantum coherence. One interesting aspect is that the correlated coherence capture all the thermal entanglement at low temperatures, i.e, the local coherences are totally transferred to the thermal entanglement. Finally, we focus on the role played by thermal entanglement and the correlated coherence responsible for quantum correlations. We show that in all cases, the correlated coherence is more robust than the thermal entanglement so that quantum algorithms based only on correlated coherence may be more robust than those based on entanglement. Our results also show that the entanglement can be tuned by varying the Coulomb interaction between electrons.
description: 7 pages, 8 figures
High-Q Interstitial Square Coupled Microring Resonators Arrays
Creators: name: Liao, Shaolin
name: Ou, Lu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The properties of the square array of coupled Microring Resonators (MRRs) with interstitial rings are studied. Dispersion behavior of the interstitial square coupled MRRs is obtained through the transfer matrix method with the Floquet-Bloch periodic condition. Analytical formulas of the eigen wave vectors, band gaps and eigen mode vectors are derived for the special cases of the interstitial square coupled MRRs array with identical couplers and the regular square coupled MRRs array without the interstitial rings. Then, the eigen modes' field distribution are calculated for each of the four eigen wave vectors for a given frequency through the secular equation. Finally, numerical simulation is performed for an interstitial square coupled MRRs array with identical couplers and a regular square coupled MRRs array. The simulation result verifies the analytical analysis. Finally, the loaded quality factors of the interstitial 5-ring configuration, the regular 4-ring configuration and the 1-ring configuration are obtained. It is found that the loaded quality factor of the interstitial 5-ring configuration is up to 20 times and 8 times as high as those of the 1-ring configuration and the regular 4-ring configuration respectively, mainly due to the degenerated eigen modes at the resonant frequency. Thus, the interstitial square coupled MRRs array has the great potential to form high-quality integrated photonics components, including filters and resonance based sensing devices like the parity-time symmetric sensors.
description: 17 pages, 8 figures, extended paper of a paper published at IEEE Journal of Quantum Electronics, vol. 56, no. 4, pp. 1-8, Aug. 2020, Art no. 6500208, doi: 10.1109/JQE.2020.2989809
[B.7.09.b.] Extraits d'une interview de Georges Marchais à Europe 1
Creators: name: Diard, Jean
name: Bidou, Jacques (1945-....)
Publisher: name: École des Hautes Études en Sciences Sociales; Uni/Ci/Té
Year: 2023
Subjects: http://www.idref.fr/027261468/id
http://www.idref.fr/034705074/id
http://www.idref.fr/050613995/id

Abstract
Seismic indices -- a deep look inside evolved stars
Creators: name: Mosser, Benoit
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Independent of stellar modelling, global seismic parameters of red giants provide unique information on the individual stellar properties as well as on stellar evolution. They allow us to measure key stellar parameters, such as the stellar mass and radius, or to derive the distance of field stars. Furthermore, oscillations with a mixed character directly probe the physical conditions in the stellar core. Here, we explain how very precise seismic indices are obtained, and how they can be used for monitoring stellar evolution and performing Galactic archeology.
description: To appear in Astronomische Nachrichten, special issue "Reconstruction the Milky Way's History: Spectroscopic surveys, Asteroseismology and Chemo-dynamical models", Guest Editors C. Chiappini, J. Montalb\'an, and M. Steffen, AN 2016 (in press)
Effects of paramagnetic fluctuations on the thermochemistry of MnO (100) surfaces in the oxygen evolution reaction
Creators: name: Yoon, Sangmoon
name: Jin, Kyoungsuk
name: Lee, Sangmin
name: Nam, Ki Tae
name: Kim, Miyoung
name: Kwon, Young-Kyun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigated the effects of paramagnetic (PM) fluctuations on the thermochemistry of the MnO(100) surface in the oxygen evolution reaction (OER) using the "noncollinear magnetic sampling method \textit{plus} $U$" (NCMSM$+U$). Various physical properties, such as the electronic structure, free energy, and charge occupation, of the MnO (100) surface in the PM state with several OER intermediates, were reckoned and compared to those in the antiferromagnetic (AFM) state. We found that PM fluctuation enhances charge transfer from a surface Mn ion to each of the intermediates and strengthens the chemical bond between them, while not altering the overall features, such as the rate determining step and resting state, in reaction pathways. The enhanced charge transfer can be attributed to the delocalized nature of valence bands observed in the PM surface. In addition, it was observed that chemical-bond enhancement depends on the intermediates, resulting in significant deviations in reaction energy barriers. Our study suggests that PM fluctuations play a significant role in the thermochemistry of chemical reactions occurring on correlated oxide surfaces.
description: Maintext: 15 pages, 3 figures 2 tables; SI: 3 pages, 2 figures
Probabilistic Model Updating of Steel Frame Structures Using Strain and Acceleration Measurements: A Multitask Learning Framework
Creators: name: Yaoyama, Taro
name: Itoi, Tatsuya
name: Iyama, Jun
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: This paper proposes a multitask learning framework for probabilistic model updating by jointly using strain and acceleration measurements. This framework can enhance the structural damage assessment and response prediction of existing steel frame structures with quantified uncertainty. Multitask learning may be used to address multiple similar inference tasks simultaneously to achieve a more robust prediction performance by transferring useful knowledge from one task to another, even in situations of data scarcity. In the proposed model-updating procedure, a spatial frame is decomposed into multiple planar frames that are viewed as multiple tasks and jointly analyzed based on the hierarchical Bayesian model, leading to robust estimation results. The procedure uses a displacement-stress relationship in the modal space because it directly reflects the elemental stiffness and requires no prior knowledge concerning the mass, unlike most existing model-updating techniques. Validation of the proposed framework by using a full-scale vibration test on a one-story, one-bay by one-bay moment resisting steel frame, wherein structural damage to the column bases is simulated by loosening the anchor bolts, is presented. The experimental results suggest that the displacement-stress relationship has sufficient sensitivity toward localized damage, and the Bayesian multitask learning approach may result in the efficient use of measurements such that the uncertainty involved in model parameter estimation is reduced. The proposed framework facilitates more robust and informative model updating.
Special coordinate systems in pseudo-Finsler geometry and the equivalence principle
Creators: name: Minguzzi, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Special coordinate systems are constructed in a neighborhood of a point or of a curve. Taylor expansions can then be easily inferred for the metric, the connection, or the Finsler Lagrangian in terms of curvature invariants. These coordinates circumvent the difficulties of the normal and Fermi coordinates in Finsler geometry, which in general are not sufficiently differentiable. They are obtained applying the usual constructions to the pullback of a horizontally torsionless connection. The results so obtained are easily specialized to the Berwald or Chern-Rund connections and have application in the study of the equivalence principle in Finslerian extensions of general relativity.
description: 20 pages
Challenges in Analogical Reasoning
Creators: name: Lin, Shih-Yin
name: Singh, Chandralekha
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Learning physics requires understanding the applicability of fundamental principles in a variety of contexts that share deep features. One way to help students learn physics is via analogical reasoning. Students can be taught to make an analogy between situations that are more familiar or easier to understand and another situation where the same physics principle is involved but that is more difficult to handle. Here, we examine introductory physics students' ability to use analogies in solving problems involving Newton's second law. Students enrolled in an algebra-based introductory physics course were given a solved problem involving tension in a rope and were then asked to solve another problem for which the physics is very similar but involved a frictional force. They were asked to point out the similarities between the two problems and then use the analogy to solve the friction problem.
Is the free-energy principle a formal theory of semantics? From variational density dynamics to neural and phenotypic representations
Creators: name: Ramstead, Maxwell
name: Friston, Karl
name: Hipolito, Ines
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: The aim of this paper is twofold: (1) to assess whether the construct of neural representations plays an explanatory role under the variational free-energy principle and its corollary process theory, active inference; and (2) if so, to assess which philosophical stance - in relation to the ontological and epistemological status of representations - is most appropriate. We focus on non-realist (deflationary and fictionalist-instrumentalist) approaches. We consider a deflationary account of mental representation, according to which the explanatorily relevant contents of neural representations are mathematical, rather than cognitive, and a fictionalist or instrumentalist account, according to which representations are scientifically useful fictions that serve explanatory (and other) aims. After reviewing the free-energy principle and active inference, we argue that the model of adaptive phenotypes under the free-energy principle can be used to furnish a formal semantics, enabling us to assign semantic content to specific phenotypic states (the internal states of a Markovian system that exists far from equilibrium). We propose a modified fictionalist account: an organism-centered fictionalism or instrumentalism. We argue that, under the free-energy principle, pursuing even a deflationary account of the content of neural representations licenses the appeal to the kind of semantic content involved in the aboutness or intentionality of cognitive systems; our position is thus coherent with, but rests on distinct assumptions from, the realist position. We argue that the free-energy principle thereby explains the aboutness or intentionality in living systems and hence their capacity to parse their sensory stream using an ontology or set of semantic factors.
description: 35 pages, 4 figures, 1 table
Controlling chaos in some laser systems via variable coupling and feedback time delay
Creators: name: Shahverdiev, E. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study numerically a system of two lasers cross-coupled optoelectronically with a time delay where the output intensity of each laser modulates the pump current of the other laser. We demonstrate control of chaos via variable coupling time delay by converting the laser intensity chaos to the steady state. We also show that wavelength chaos in an electrically tunable distributed Bragg reflector laser diode with a feedback loop can be controlled via variable feedback time delay.
description: Accepted in The International Journal of Modern Physics B (2016),11 pages plus 8 figures. Paper ID 1650181 (2016)
Modeling film flows down a fibre influenced by nozzle geometry
Creators: name: Ji, Hangjie
name: Sadeghpour, Abolfazl
name: Ju, Y. Sungtaek
name: Bertozzi, Andrea L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the effects of nozzle geometry on the dynamics of thin fluid films flowing down a vertical cylindrical fibre. Recent experiments show that varying the nozzle diameter can lead to different flow regimes and droplet characteristics in the film. Using a weighted residual modeling approach, we develop a system of coupled equations that account for inertia, surface tension effects, gravity, and a film stabilization mechanism to describe both near-nozzle fluid structures and downstream bead dynamics. We report good agreement between the predicted droplet properties and the experimental data.
description: 10 pages, 6 figures