cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On tests of general relativity with binary radio pulsars
Creators: name: Del Pozzo, Walter
name: Vecchio, Alberto
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The timing of radio pulsars in binary systems provides a superb testing ground of general relativity. Here we propose a Bayesian approach to carry out these tests, and a relevant efficient numerical implementation, that has several conceptual and practical advantages with respect to traditional methods based on least-square-fits that have been used so far: (i) it accounts for the actual structure of the likelihood function - and it is not predicated on the Laplace approximation which is implicitly built in least-square fits that can potentially bias the inference - (ii) it provides the ratio of the evidences of any two models under consideration as the statistical quantity to compare different theories, and (iii) it allows us to put joint constraints from the monitoring of multiple systems, that can be expressed in terms of ratio of evidences or probability intervals of global (thus not system-dependent) parameters of the theory, if any exists. Our proposed approach optimally exploits the progress in timing of radio pulsars and the increase in the number of observed systems. We demonstrate the power of this framework using simulated data sets that are representative of current observations.
description: Accepted for publication on MNRAS Letters
Study of the V$_2^0$ state in neutron-irradiated silicon using photon-absorption measurements
Creators: name: Fretwurst, Eckhart
name: Klanner, Robert
name: Schwandt, Joern
name: Vauth, Annika
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Pieces of $n$-type silicon with 3.5 k$Ω\cdot $cm resistivity have been irradiated by reactor neutrons to fluences of (1, 5 and 10) $\times 10^{16}$ cm$^{-2}$. Using light-transmission measurements, the absorption coefficients have been determined for photon energies, $E_γ$, between 0.62 and 1.30 eV for the samples as irradiated and after 15 min isochronal annealing with temperatures between 80°C and 330°C. The radiation-induced absorption coefficient, $α_\mathit{irr}$, has been obtained by subtracting the absorption coefficient for non-irradiated silicon. The $E_γ$-dependence of $α_\mathit{irr}$ shows a resonance peak, which is ascribed to the neutral divacancy, V$_2^0$, sitting on a background, and $α_\mathit{irr} (E_γ)$ is fitted by a Breit-Wigner line shape on a parameterized background. It is found that at an annealing temperature of 210°C the V$_2^0$ intensity is reduced by a factor 2, and that at the meV level, the position and the width of the fitted Breit-Wigner do not change with irradiation dose and annealing.
description: 8 pages, 4 figures
AuDiET: Auditory Diagnostics and Error-based Treatment - Towards performance-based fitting
Creators: name: Migliorini, Enrico
name: Philpott, Nikki
name: Wasmann, Jan-Willem
name: van Dijk, Bas
name: Philips, Birgit
name: Mylanus, Emmanuel
name: Huinck, Wendy
Publisher: name: Zenodo
Year: 2023

description: Poster presented at CIAP 2023, over the topic of the AuDiET study.
Mapping Reactive Flow Patterns in Monolithic Nanoporous Catalysts
Creators: name: Falcucci, Giacomo
name: Succi, Sauro
name: Montessori, Andrea
name: Melchionna, Simone
name: Prestininzi, Pietro
name: Barroo, Cedric
name: Bell, David C.
name: Biener, Monika M.
name: Biener, Juergen
name: Zugic, Branko
name: Kaxiras, Efthimios
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The development of high-efficiency porous catalyst membranes critically depends on our understanding of where the majority of the chemical conversions occur within the porous structure. This requires mapping of chemical reactions and mass transport inside the complex nano-scale architecture of porous catalyst membranes which is a multiscale problem in both the temporal and spatial domain. To address this problem, we developed a multi-scale mass transport computational framework based on the Lattice Boltzmann Method (LBM) that allows us to account for catalytic reactions at the gas-solid interface by introducing a new boundary condition. In good agreement with experiments, the simulations reveal that most catalytic reactions occur near the gas-flow facing side of the catalyst membrane if chemical reactions are fast compared to mass transport within the porous catalyst membrane.
Propinquity of current and vortex structures: effects on collisionless plasma heating
Creators: name: Parashar, Tulasi N
name: Matthaeus, William H
Publisher: name: arXiv
Year: 2016
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Intermittency of heating in weakly collisional plasma turbulence is an active subject of research, with significant potential impact on understanding of the solar wind, solar corona and astrophysical plasmas. Recent studies suggest a role of vorticity in plasma heating. In magnetohydrodynamics small scale vorticity is generated near current sheets and this effect persists in kinetic plasma, as demonstrated here with hybrid and fully kinetic Particle-In-Cell (PIC) simulations. Furthermore, vorticity enhances local kinetic effects, with a generalized resonance condition selecting sign-dependent enhancements or reductions of proton heating and thermal anisotropy. In such plasmas heating is correlated with vorticity and current density, but more strongly with vorticity. These results help explain several prior results that find kinetic effects and energization near to, but not centered on, current sheets. Evidently intermittency in kinetic plasma involves multiple physical quantities, and the associated coherent structures and nonthermal effects are closely related.
description: Accepted for publication in ApJ
title: Vocabulaire de l'agroalimentaire
title: Agri-food vocabulary
Creators: name: Institut De L’information Scientifique Et Technique (Inist)-CNRS/UAR76
Publisher: name: Institut de l’information scientifique et technique (Inist) - CNRS/UAR76
Year: 2023
Subjects: subject: Sciences de la vie
subject: Agroalimentaire
subject: Life sciences
subject: Agri-food

description: Ce vocabulaire bilingue (français-anglais) comprend 3117 concepts des domaines de la science et de la technologie agroalimentaire, allant « de la ferme à la table », ainsi que des aspects nutritionnels et environnementaux, tenant compte de la transition agricole et alimentaire en cours. La terminologie est enrichie d’un grand nombre d’accès synonymes (3230 en français ou en anglais) et de formes cachées facilitant la recherche.
Documentation for describing the mapping between EPOS-DCAT-AP metadata, ENVRI Catalogue APIs, ENVRI Catalogue GUI
Creators: name: Giuliacci, Kety
name: Paciello, Rossana
Publisher: name: Zenodo
Year: 2023
Subjects: metadata
ENVRI
EPOS
DCAT-AP
EPOS-DCAT-AP
semantics

description: The documentation titled "Documentation for Describing the Mapping between EPOS-DCAT-AP Metadata, ENVRI Catalogue APIs, ENVRI Catalogue GUI" provides in-depth information on how these three components - EPOS-DCAT-AP Metadata, ENVRI Catalogue APIs, and ENVRI Catalogue GUI - are interrelated and integrated. This includes how metadata is structured and stored using EPOS-DCAT-AP, how APIs are used to access this metadata, and how the graphical user interface is designed to provide end-users with an accessible way to explore and make use of the services and data offered through the ENVRI Catalogue. This documentation is essential for developers, data curators, and any stakeholders involved in the development, maintenance, or use of the ENVRI Catalogue of Services.
Mach and Reynolds Number Effects on Transonic Buffet on the XRF-1 Transport Aircraft Wing at Flight Reynolds Number
Creators: name: Waldmann, Andreas
name: Ehrle, Maximilian C.
name: Kleinert, Johannes
name: Yorita, Daisuke
name: Lutz, Thorsten
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This work provides an overview of aerodynamic data acquired in the European Transonic Windtunnel using an XRF-1 transport aircraft configuration both at cruise conditions and at the edges of the flight envelope. The goals and design of the wind tunnel test was described, highlighting the use of the cryogenic wind tunnel's capability to isolate the effects of Mach and Reynolds numbers and the dynamic pressure. The resulting dataset includes an aerodynamic baseline characterization of the full span model with vertical and horizontal tailplanes and without engine nacelles. The effects of different inflow conditions were studied using data from continuous polars, evaluating the changes in aeroelastic deformation which are proportional to $q/E$ and the influence of $M$ and $Re$ on the shock position. Off-design data was analyzed at the lowest and highest measured Mach numbers of 0.84 and 0.90, respectively. Wing lower surface flow and underside shock motion was analyzed at negative angles of attack using $c_p$ distribution and unsteady pressure transducer fluctuation data, identifying significant upstream displacement of the shock close to the leading edge. Wing upper side flow and the shock motion near buffet onset and beyond was analyzed using unsteady pressure data from point transducers and unsteady pressure sensitive paint (PSP) measurements. Buffet occurs at lower angles of attack at high Mach number, and without clearly defined lift break. Spectral contents at the acquired data points in the buffet range suggest broadband fluctuations at Strouhal numbers between 0.2 and 0.6, which is consistent with recent literature. The spanwise shock propagation velocities were determined independently via analysis of unsteady PSP and pressure transducers to be in the range between $u_s / u_{\infty} = 0.24$ and $0.32$.
Dynamical symmetry enhancement near N=2, D=4 gauged supergravity horizons
Creators: name: Gutowski, J.
name: Mohaupt, T.
name: Papadopoulos, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that all smooth Killing horizons with compact horizon sections of 4-dimensional gauged N=2 supergravity coupled to any number of vector multiplets preserve $2 c_1({\cal K})+4 \ell$ supersymmetries, where ${\cal K}$ is a pull-back of the Hodge bundle of the special Kähler manifold on the horizon spatial section. We also demonstrate that all such horizons with $c_1({\cal K})=0$ exhibit an SL(2,R) symmetry and preserve either 4 or 8 supersymmetries. If the orbits of the SL(2,R) symmetry are 2-dimensional, the horizons are warped products of AdS2 with the horizon spatial section. Otherwise, the horizon section admits an isometry which preserves all the fields. The proof of these results is centered on the use of index theorem in conjunction with an appropriate generalization of the Lichnerowicz theorem for horizons that preserve at least one supersymmetry. In all $c_1({\cal K})=0$ cases, we specify the local geometry of spatial horizon sections and demonstrate that the solutions are determined by first order non-linear ordinary differential equations on some of the fields.
description: 60 pages, latex
An Alternative Press? New Forms of News Reporting in Brazil
Creators: name: Fragoso De Oliveira Sarmento, Claudia
Publisher: name: University of Westminster
Year: 2019

description: This study examines the emergence of alternative forms of news production in Brazil within the context of an increasingly unstable democracy. It focuses on different genres of not-for-profit journalism to understand the roles of alternative news producers, their relationships with traditional journalistic practices, such as the norm of objectivity, and their approach to financial sustainability. Drawing on alternative media studies, this thesis combines semi-structured interviews with independent news producers and qualitative content analysis. Interviewees include both citizen journalists and professional journalists with experience in legacy newsrooms who are now engaged with small-scale alternative news outlets. Content analysis examines the production of four cases: an independent investigative outlet that covers human rights violations; a journalism agency covering the Amazon region; a community media collective from one of Rio de Janeiro’s largest favelas; and a feminist outlet from São Paulo focused on women from peripheral areas. n exploring what kinds of stories they convey, how they are organised, and to what extent their production enables a better understanding of the issues afflicting a country in crisis, this study sheds light on the relevance of alternative journalism and reflects on changing journalistic boundaries. Although their practices are very heterogeneous, the research demonstrates that alternative journalists are challenging the agenda-setting process of commercial media by tackling misrepresentation, stereotypes and discrimination against particular communities with a nuanced adaptation of fundamental journalistic norms. Alternative news sites also reject the traditional business model of mainstream media and seek diversification of revenue-generating activities. This research highlights the emergence of new players in the Brazilian news media ecosystem and points to their significance in the diversification of the news agenda in a country where a few private groups own mass media corporations. Their attempts to be more than a temporary presence in the media landscape create counter-hegemonic spaces to enhance debates on issues such as racism, state repression and social and gender inequality in Brazil.
CTD2022: The ATLAS Inner Detector tracking trigger at 13 TeV in LHC Run-2 and new developments on standard and unconventional tracking signatures for the upcoming LHC Run-3
Creators: name: Long, Jonathan
name: Kirk, Julie
name: Nagano, Kunihiro
Publisher: name: Zenodo
Year: 2022

description: The performance of the Inner Detector tracking trigger of the ATLAS experiment at the LHC is evaluated for the data-taking period of Run-2 (2015-2018). The Inner Detector tracking was used for the muon, electron, tau, and b-jet triggers, and its high performance is essential for a wide variety of ATLAS physics programs such as many precision measurements of the Standard Model and searches for new physics. The detailed efficiencies and resolutions of the trigger in a wide range of physics signatures are presented for the Run 2 data. From the upcoming Run-3, starting in 2022, the application of Inner Detector tracking in the trigger is planned to be significantly expanded, in particular, full-detector tracking will be utilized for hadronic signatures (such as jets and missing transverse energy triggers) for the first time. To meet computing resource limitations, various improvements, including machine-learning-based track seeding, have been developed.
Magnetic fingerprint of interfacial coupling between CoFe and nanoscale ferroelectric domain walls
Creators: name: Zhang, Qintong
name: Murray, Peyton
name: You, Lu
name: Wan, Caihua
name: Zhang, Xuan
name: Li, Wenjing
name: Khan, Usman
name: Wang, Junling
name: Liu, Kai
name: Han, Xiufeng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetoelectric coupling in ferromagnet/multiferroic systems is often manifested in the exchange bias effect, which may have combined contributions from multiple sources, such as domain walls, chemical defects or strain. In this study we magnetically "fingerprint" the coupling behavior of CoFe grown on epitaxial BiFeO3 (BFO) thin films by magnetometry and first-order-reversal-curves (FORC). The contribution to exchange bias from 71°, 109° and charged ferroelectric domain walls (DWs) was elucidated by the FORC distribution. CoFe samples grown on BFO with 71° DWs only exhibit an enhancement of the coercivity, but little exchange bias. Samples grown on BFO with 109° DWs and mosaic DWs exhibit a much larger exchange bias, with the main enhancement attributed to 109° and charged DWs. Based on the Malozemoff random field model, a varying-anisotropy model is proposed to account for the exchange bias enhancement. This work sheds light on the relationship between the exchange bias effect of the CoFe/BFO heterointerface and the ferroelectric DWs, and provides a path for multiferroic device analysis and design.
description: 17 pages, 3 figures, 1 table
Building Medium Size Telescope Structures for the Cherenkov Telescope Array
Creators: name: Schulz, A.
name: Garczarczyk, M.
name: Oakes, L.
name: Schlenstedt, S.
name: Schwanke, U.
name: Consortium, the CTA
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Cherenkov Telescope Array (CTA) is the future instrument in ground-based gamma-ray astronomy in the energy range from 20 GeV to 300 TeV. Its sensitivity will surpass that of current generation experiments by a factor $\sim$10, facilitated by telescopes of three sizes. The performance in the core energy regime will be dominated by Medium Size Telescopes (MST) with a reflector of 12 m diameter. A full-size mechanical prototype of the telescope structure has been constructed in Berlin. The performance of the prototype is being evaluated and optimisations, among others, facilitating the assembly procedure and mass production possibilities are being implemented. We present the current status of the developments from prototyping towards pre-production telescopes, which will be deployed at the final site.
description: Contribution to the 6th International Symposium on High Energy Gamma-Ray Astronomy (Gamma2016), July 11-15, 2016, Heidelberg, Germany. To be published in the AIP Conference Proceedings
On hamiltonian colorings of block graphs
Creators: name: Bantva, Devsi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C78, 05C15

description: A hamiltonian coloring c of a graph G of order p is an assignment of colors to the vertices of G such that $D(u,v)+|c(u)-c(v)|\geq p-1$ for every two distinct vertices u and v of G, where D(u,v) denoted the detour distance between u and v. The value hc(c) of a hamiltonian coloring c is the maximum color assigned to a vertex of G. The hamiltonian chromatic number, denoted by hc(G), is the min{hc(c)} taken over all hamiltonian coloring c of G. In this paper, we present a lower bound for the hamiltonian chromatic number of block graphs and give a sufficient condition to achieve the lower bound. We characterize symmetric block graphs achieving this lower bound. We present two algorithms for optimal hamiltonian coloring of symmetric block graphs.
description: 12 pages, 1 figure. A conference version appeared in the proceedings of WALCOM 2016
Dynamical formation of a hairy black hole in a cavity from the decay of unstable solitons
Creators: name: Sanchis-Gual, Nicolas
name: Degollado, Juan Carlos
name: Font, José A.
name: Herdeiro, Carlos
name: Radu, Eugen
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent numerical relativity simulations within the Einstein--Maxwell--(charged-)Klein-Gordon (EMcKG) system have shown that the non-linear evolution of a superradiantly unstable Reissner-Nordström black hole (BH) enclosed in a cavity, leads to the formation of a BH with scalar hair. Perturbative evidence for the stability of such hairy BHs has been independently established, confirming they are the true endpoints of the superradiant instability. The same EMcKG system admits also charged scalar soliton-type solutions, which can be either stable or unstable. Using numerical relativity techniques, we provide evidence that the time evolution of some of these $\textit{unstable}$ solitons leads, again, to the formation of a hairy BH. In some other cases, unstable solitons evolve into a (bald) Reissner-Nordström BH. These results establish that the system admits two distinct channels to form hairy BHs at the threshold of superradiance: growing hair from an unstable (bald) BH, or growing a horizon from an unstable (horizonless) soliton. Some parallelism with the case of asymptotically flat boson stars and Kerr BHs with scalar hair is drawn.
Relativistic quasi-solitons and embedded solitons with circular polarization in cold plasmas
Creators: name: Sánchez-Arriaga, G.
name: Siminos, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The existence of localized electromagnetic structures is discussed in the framework of the 1-dimensional relativistic Maxwell-fluid model for a cold plasma with immobile ions. New partially localized solutions are found with a finite-difference algorithm designed to locate numerically exact solutions of the Maxwell-fluid system. These solutions are called quasi-solitons and consist of a localized electromagnetic wave trapped in a spatially extended electron plasma wave. They are organized in families characterized by the number of nodes $p$ of the vector potential and exist in a continuous range of parameters in the $ω-V$ plane, where $V$ is the velocity of propagation and $ω$ is the vector potential angular frequency. A parametric study shows that the familiar fully localized relativistic solitons are special members of the families of partially localized quasi-solitons. Soliton solution branches with $p>1$ are therefore parametrically embedded in the continuum of quasi-solitons. On the other hand, geometric arguments and numerical simulations indicate that $p=0$ solitons exist only in the limit of either small amplitude or vanishing velocity. Direct numerical simulations of the Maxwell-fluid model indicate that the $p>0$ quasi-solitons (and embedded solitons) are unstable and lead to wake excitation, while $p=0$ quasi-solitons appear stable. This helps explain the ubiquitous observation of structures that resemble $p=0$ solitons in numerical simulations of laser-plasma interaction.
description: 11 pages, 12 figures, corrected a reference
Synergizing 21 cm and sub-millimetre surveys during reionization: new empirical insights
Creators: name: Padmanabhan, Hamsa
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the latest results from Atacama Large Millimetre/submillimetre Array (ALMA) surveys targeting the ionized carbon [CII] 158 $μ$m and oxygen [OIII] 88 $μ$m lines, in combination with data-driven predictions for the evolution of neutral hydrogen (HI), to illustrate the prospects for intensity mapping cross-correlations between 21 cm and submillimetre surveys over $z \sim 5-7$. We work with a dataset including the ALPINE and REBELS surveys for [CII] over $z \sim 4.5-7$, and ALMA [OIII] detections over $z \sim 6-9$. The resultant evolution of the [CII] luminosity - halo mass relation is well described by a double power law at high redshifts, with the best-fitting parameters in good agreement with the results of simulations. The data favour secure detections of the auto-power spectrum of [CII] at all redshifts with an enhanced Fred Young Submillimetre Telescope (FYST)-like configuration. Such an experiment, along with the Murchinson Widefield Array (MWA) will be able to measure the 21 cm - [CII] cross-correlation power with a signal-to-noise ratio of a few tens to a few hundreds. We find that a balloon-borne experiment improving upon the Experiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) should be able to detect the 21 cm - [OIII] cross-correlation with the MWA and the Square Kilometre Array (SKA)-LOW out to $z \sim 7$. Our results have implications for constraining the evolution of luminous sources during the mid-to-end stages of reionization.
description: 13 pages, 7 figures, 3 tables; version accepted for publication in MNRAS
WHOLE BODY MOVEMENT ANALYSIS PROTOCOL - A CONTEMPORARY PERSPECTIVE OF HUMAN MOVEMENT SCIENCES: DYNAMIC COMPLEX SYSTEMS, ORGANIZATIONS OF AUTOPOIETIC MOVEMENT SYSTEMS, FRACTALS AND CHAOS - Doctoral Thesis by Luísa Beatriz Trevisan Trevisan, Universidade Federal do Rio Grande do Sul (PPGCMH), Brazil.
Creators: name: TREVISAN, Luísa
name: Ivaniski-Mello, André
name: Ribeiro, Jerri Luiz
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 420701
subject: Biomechanics
classificationCode: 420703
subject: Motor control
classificationCode: 420799
subject: Sports science and exercise not elsewhere classified
classificationCode: 360205
subject: Technical writing

description: Este protocolo foi criado e desenvolvido pelos autores como parte integrante da tese de doutorado de Luísa Trevisan, a primeira autora. Este roteiro faz parte do processo de pesquisa desenvolvida e contou com fomento com Bolsa de Pesquisa, obtida por meio do Edital público da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) 05/2021.Propõe-se de maneira simples uma organização e exercício intelectual para análise de redes nas Ciências do Movimento Humano oferece uma perspectiva inovadora e abrangente para a compreensão da complexidade e organização dos sistemas de movimento humano.
Higgs portal dark matter and neutrino mass and mixing with a doubly charged scalar
Creators: name: Hierro, I. M.
name: King, S. F.
name: Rigolin, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider an extension of the Standard Model involving two new scalar particles around the TeV scale: a singlet neutral scalar $ϕ$, to be eventually identified as the Dark Matter candidate, plus a doubly charged $SU(2)_L$ singlet scalar, $S^{++}$, that can be the source for the non-vanishing neutrino masses and mixings. Assuming an unbroken $Z_2$ symmetry in the scalar sector, under which only the additional neutral scalar $ϕ$ is odd, we write the most general (renormalizable) scalar potential. The model may be regarded as a possible extension of the conventional Higgs portal Dark Matter scenario which also accounts for neutrino mass and mixing. This framework cannot completely explain the observed positron excess. However a softening of the discrepancy observed in conventional Higgs portal framework can be obtained, especially when the scale of new physics responsible for generating neutrino masses and lepton number violating processes is around 2 TeV.
description: 16 pages, 4 figures
Non-parametric Lagrangian biasing from the insights of neural nets
Creators: name: Wu, Xiaohan
name: Munoz, Julian B.
name: Eisenstein, Daniel J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a Lagrangian model of galaxy clustering bias in which we train a neural net using the local properties of the smoothed initial density field to predict the late-time mass-weighted halo field. By fitting the mass-weighted halo field in the AbacusSummit simulations at z=0.5, we find that including three coarsely spaced smoothing scales gives the best recovery of the halo power spectrum. Adding more smoothing scales may lead to 2-5% underestimation of the large-scale power and can cause the neural net to overfit. We find that the fitted halo-to-mass ratio can be well described by two directions in the original high-dimension feature space. Projecting the original features into these two principal components and re-training the neural net either reproduces the original training result, or outperforms it with a better match of the halo power spectrum. The elements of the principal components are unlikely to be assigned physical meanings, partly owing to the features being highly correlated between different smoothing scales. Our work illustrates a potential need to include multiple smoothing scales when studying galaxy bias, and this can be done easily with machine-learning methods that can take in high dimensional input feature space.
description: submitted to JCAP
Phase transitions and optimal algorithms in high-dimensional Gaussian mixture clustering
Creators: name: Lesieur, Thibault
name: De Bacco, Caterina
name: Banks, Jess
name: Krzakala, Florent
name: Moore, Cris
name: Zdeborová, Lenka
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We consider the problem of Gaussian mixture clustering in the high-dimensional limit where the data consists of $m$ points in $n$ dimensions, $n,m \rightarrow \infty$ and $α= m/n$ stays finite. Using exact but non-rigorous methods from statistical physics, we determine the critical value of $α$ and the distance between the clusters at which it becomes information-theoretically possible to reconstruct the membership into clusters better than chance. We also determine the accuracy achievable by the Bayes-optimal estimation algorithm. In particular, we find that when the number of clusters is sufficiently large, $r > 4 + 2 \sqrtα$, there is a gap between the threshold for information-theoretically optimal performance and the threshold at which known algorithms succeed.
description: 8 pages, 3 figures, conference
Maximal switchability of centralized networks
Creators: name: Vakulenko, Sergei
name: Morozov, Ivan
name: Radulescu, Ovidiu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: We consider continuous time Hopfield-like recurrent networks as dynamical models for gene regulation and neural networks. We are interested in networks that contain n high-degree nodes preferably connected to a large number of Ns weakly connected satellites, a property that we call n/Ns-centrality. If the hub dynamics is slow, we obtain that the large time network dynamics is completely defined by the hub dynamics. Moreover, such networks are maximally flexible and switchable, in the sense that they can switch from a globally attractive rest state to any structurally stable dynamics when the response time of a special controller hub is changed. In particular, we show that a decrease of the controller hub response time can lead to a sharp variation in the network attractor structure: we can obtain a set of new local attractors, whose number can increase exponentially with N, the total number of nodes of the nework. These new attractors can be periodic or even chaotic. We provide an algorithm, which allows us to design networks with the desired switching properties, or to learn them from time series, by adjusting the interactions between hubs and satellites. Such switchable networks could be used as models for context dependent adaptation in functional genetics or as models for cognitive functions in neuroscience.
In Cohen generic extension, every countable OD set of reals belongs to the ground model
Creators: name: Kanovei, Vladimir
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 03E15, 03E35, 03E45

description: It is true in the Cohen generic extension of L, the constructible universe, that every countable ordinal-definable set of reals belongs to L.
Jack characters and enumeration of maps
Creators: name: Czyżewska-Jankowska, Agnieszka
name: Śniady, Piotr
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E05 (Primary) 20C30, 05C10, 05C30 (Secondary)

description: Jack characters provide dual information about Jack symmetric functions. We give explicit formulas for the top-degree part of these Jack characters in terms of bicolored oriented maps with an arbitrary face structure.
description: 12 pages; initial submission of an "extended abstract" for the conference FPSAC 2017. Overview of the preprints arXiv:1506.06361 and arXiv:1611.02012
DataCite: 研究をつないで知識の発展を目指す
Creators: name: Edmunds, Rorie
name: 宮入, 暢子
Publisher: name: Zenodo
Year: 2023
Subjects: FAIR原則
PID(永続的識別子)
研究成果物
DataCite
Japan Link Center
科学技術振興機構
物質・材料研究機構

description: 本セッションは、DataCiteとジャパンリンクセンター(JaLC)との共同開催でした。JaLC は、日本の研究機関や大学によるDataCite DOI登録を行なうコンソーシアム(JaLCコンソーシアム)を設立しました。本セッションでは、DataCiteとJaLCから、JaLCの新しいコンソーシアムの発足について、および両組織のパートナーシップなどを紹介しました。このセッションで重要なのは、日本の研究コミュニティに対して、ジャーナル論文以外の研究成果、研究データについて、永続的識別子(Persistent Identifier:PID)を登録することの価値を強調することでした。
A Dark Matter Trigger for Early Dark Energy Coincidence
Creators: name: Lin, Meng-Xiang
name: McDonough, Evan
name: Hill, J. Colin
name: Hu, Wayne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Early dark energy (EDE), whose cosmological role is localized in time around the epoch of matter-radiation equality in order to resolve the Hubble tension, introduces a new coincidence problem: why should the EDE dynamics occur near equality if EDE is decoupled from both matter and radiation? The resolution of this problem may lie in an {\it early dark sector} (EDS), wherein the dark matter mass is dependent on the EDE scalar field. Concretely, we consider a Planck-suppressed coupling of EDE to dark matter, as would naturally arise from breaking of the global $U(1)$ shift symmetry of the former by quantum gravity effects. With a sufficiently flat potential, the rise to dominance of dark matter at matter-radiation equality itself triggers the rolling and subsequent decay of the EDE. We show that this {\it trigger} EDS (tEDS) model can naturally resolve the EDE coincidence problem at the background level without any fine tuning of the coupling to dark matter or of the initial conditions. When fitting to current cosmological data, including that from the local distance ladder and the low-redshift amplitude of fluctuations, the tEDS maximum-likelihood model performs comparably to EDE for resolving the Hubble tension, achieving $H_0 =71.2$ km/s/Mpc. However, fitting the \emph{Planck} cosmic microwave background data requires a specific range of initial field positions to balance the scalar field fluctuations that drive acoustic oscillations, providing testable differences with other EDE models.
description: 12 pages, 6 figures
Non-Concave Penalization in Linear Mixed-Effects Models and Regularized Selection of Fixed Effects
Creators: name: Ghosh, Abhik
name: Thoresen, Magne
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Mixed-effect models are very popular for analyzing data with a hierarchical structure, e.g. repeated observations within subjects in a longitudinal design, patients nested within centers in a multicenter design. However, recently, due to the medical advances, the number of fixed effect covariates collected from each patient can be quite large, e.g. data on gene expressions of each patient, and all of these variables are not necessarily important for the outcome. So, it is very important to choose the relevant covariates correctly for obtaining the optimal inference for the overall study. On the other hand, the relevant random effects will often be low-dimensional and pre-specified. In this paper, we consider regularized selection of important fixed effect variables in linear mixed-effects models along with maximum penalized likelihood estimation of both fixed and random effect parameters based on general non-concave penalties. Asymptotic and variable selection consistency with oracle properties are proved for low-dimensional cases as well as for high-dimensionality of non-polynomial order of sample size (number of parameters is much larger than sample size). We also provide a suitable computationally efficient algorithm for implementation. Additionally, all the theoretical results are proved for a general non-convex optimization problem that applies to several important situations well beyond the mixed model set-up (like finite mixture of regressions etc.) illustrating the huge range of applicability of our proposal.
description: 25 pages, under review
Gravitational waves from a plunge into a nearly extremal Kerr black hole
Creators: name: Burko, Lior M.
name: Khanna, Gaurav
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study numerically in the time domain the linearized gravitational waves emitted from a plunge into a nearly extremal Kerr black hole by solving the inhomogeneous Teukolsky equation. We consider spinning black holes for which the specific spin angular momentum $a/M=1-ε$, and we consider values of $ε\geq 10^{-6}$. We find an effective transient behavior for the quasi-normal ringdown: the early phase of the quasi-normal ringdown is governed by a decay according to inverse time, with frequency equaling twice the black hole's horizon frequency. The smaller $ε$ the later the transition from this transient inverse time decay to exponential decay. Such sources, if exist, may be interesting potential sources for terrestrial or space borne gravitational wave observatories.
description: 7 pages, 9 figures
Topographical coloured plasmonic coins
Creators: name: Guay, Jean-Michel
name: Lesina, Antonino Calà
name: Côté, Guillaume
name: Charron, Martin
name: Ramunno, Lora
name: Berini, Pierre
name: Weck, Arnaud
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The use of metal nanostructures for colourization has attracted a great deal of interest with the recent developments in plasmonics. However, the current top-down colourization methods based on plasmonic concepts are tedious and time consuming, and thus unviable for large-scale industrial applications. Here we show a bottom-up approach where, upon picosecond laser exposure, a full colour palette independent of viewing angle can be created on noble metals. We show that colours are related to a single laser processing parameter, the total accumulated fluence, which makes this process suitable for high throughput industrial applications. Statistical image analyses of the laser irradiated surfaces reveal various distributions of nanoparticle sizes which control colour. Quantitative comparisons between experiments and large-scale finite-difference time-domain computations, demonstrate that colours are produced by selective absorption phenomena in heterogeneous nanoclusters. Plasmonic cluster resonances are thus found to play the key role in colour formation.
description: 9 pages, 5 figures
Phenomenological power spectrum models for H$α$ emission line galaxies from the Nancy Grace Roman Space Telescope
Creators: name: McCarthy, Kevin S.
name: Zhai, Zhongxu
name: Wang, Yun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The High Latitude Spectroscopic Survey (HLSS) is the reference baseline spectroscopic survey for NASA's Nancy Grace Roman space telescope, measuring redshifts of $\sim 10$M H$α$ emission line galaxies over a $2000$ deg$^2$ footprint at $z=1-2$. In this work, we use a realistic Roman galaxy mock catalogue to explore optimal phenomenological modeling of the measured power spectrum. We consider two methods for modeling the redshift-space distortions (Kaiser squashing and another with a window function on $β$ that selects out the coherent radial infall pairwise velocities, $M_A$ and $M_B$, respectively), two models for the nonlinear impact of baryons that smears the BAO signal (a fixed ratio between the smearing scales in the perpendicular and parallel dimensions and another where these smearing scales are kept as a free parameters, P$_{dw}(k|k_*)$ and P$_{dw}(k|Σ_\perp,Σ_\parallel)$, respectively), and two analytical emulations of nonlinear growth (one employing the halo model and another formulated from simulated galaxy clustering of a semi-analytical model, $F_{HM}$ and $F_{SAM}$, respectively). We find that the best model combination employing $F_{HM}$ is $P_{dw}(k|k_*)*F_{HM}*M_B$, while the best combination employing $F_{SAM}$ is $P_{dw}(k|k_*)*F_{SAM}*M_B$, which leads to unbiased measurements of cosmological parameters. We compare these to the Effective Field Theory of Large-Scale Structure perturbation theory model $P_{EFT}(k|Θ)$, and find that our simple phenomenological models are comparable across the entire redshift range for $k_{max}=0.25$ and $0.3$ $h$/Mpc. We expect the tools that we have developed to be useful in probing dark energy and testing gravity using Roman in an accurate and robust manner.
description: 17 pages, 3 figures, 4 tables, Accepted to MNRAS 23 May 2023
RemoveYoung: A tool for the removal of the young stellar component in galaxies within an adjustable age cutoff
Creators: name: Gomes, Jean Michel
name: Papaderos, Polychronis
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The optical morphology of galaxies holds the cumulative record of their assembly history, and techniques for its quantitative characterization offer a promising avenue toward understanding galaxy formation and evolution. However, the morphology of star-forming galaxies is generally dictated by the youngest stellar component, which can readily overshine faint structural/morphological features in the older underlying stellar background (e.g., relics from recent minor mergers) that could hold important insights into the galaxy build-up process. Stripping off galaxy images from the emission from stellar populations younger than an adjustable age cutoff tcut can, therefore, provide a valuable tool in extragalactic research. RemoveYoung (RY), a publicly available tool that is presented here, exploits the combined power of integral field spectroscopy (IFS) and spectral population synthesis (SPS) toward this goal. Two-dimensional (2D) post-processing of SPS models to IFS data cubes with RY permits computation of the spectral energy, surface brightness, and stellar surface density distribution of stellar populations older than a user-defined tcut. This suggests a variety of applications of star-forming galaxies, such as interacting or merging galaxy pairs and lower mass starburst galaxies near and far; these include blue compact and tidal dwarf galaxies.
description: 5 pages, 4 Figures, Astronomy & Astrophysics accepted
Hot Spot model of Nucleon and Double Parton Scattering
Creators: name: Blok, B.
name: Segev, R.
name: Strikman, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the rate of double parton scattering (DPS) in proton - proton collisions in the framework of the recently proposed hot spot model of the nucleon structure. The resulting rate, especially for the case of three hot spots, appears to be in tension with the current experimental data on DPS at the LHC.
description: 12 pages 2 figures 1 table
การวิเคราะห์องค์ประกอบสมรรถนะแรงงานทางด้านโลจิสติกส์
Creators: name: สุภานุภัทร วงศ์ภู่ดี
Publisher: name: คณะบริหารธุรกิจ มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ
Year: 2566
Subjects: สมรรถนะ, แรงงาน, โลจิสติกส์

description: วารสารบริหารธุรกิจอุตสาหกรรม, 5, 1, 43-58
การพัฒนาบทเรียนออนไลน์ด้วย Moodle LMS รายวิชา คอมพิวเตอร์และเทคโนโลยีสารสนเทศสำหรับนักศึกษามหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ วิทยาเขตระยอง
Creators: name: ชัยนาจ ปั้นสันเทียะ
Publisher: name: คณะบริหารธุรกิจ มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ
Year: 2566
Subjects: บทเรียนออนไลน์, Moodle LMS

description: วารสารบริหารธุรกิจอุตสาหกรรม, 5, 1, 59-71
Phase-space structures and stellar populations in the star-forming region NGC~ 2264
Creators: name: Gonzalez, Marta
name: Alfaro, Emilio J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In this work we analyse the structure of a subspace of the phase space of the star-forming region NGC~ 2264 using the Spectrum of Kinematic Groupings (SKG). We show that the SKG can be used to process a collection of star data to find substructure at different scales. We have found structure associated with the NGC~ 2264 region and also with the background area. In the NGC~ 2264 region, a hierarchical analysis shows substructure compatible with that found in previous specific studies of the area but with an objective, compact methodology that allows us to homogeneously compare the structure of different clusters and star-forming regions. Moreover, this structure is compatible with the different ages of the main NGC~ 2264 star-forming populations. The structure found in the field can be roughly associated with giant stars far in the background, dynamically decoupled from NGC~ 2264, which could be related either with the Outer Arm or Monoceros Ring. The results in this paper confirm the relationship between structure in the RV phase-space subspace and different kinds of populations, defined by other variables not necessarily analysed with the SKG, such as age or distance, showing the importance of detecting phase-space substructure in order to trace stellar populations in the broadest sense of the word.
description: Accepted in MNRAS
title: Vocabulaire d'histoire des sciences et techniques
title: History of Science and Technology vocabulary
Creators: name: Institut De L’information Scientifique Et Technique (Inist)-CNRS/UAR76
Publisher: name: Institut de l’information scientifique et technique (Inist) - CNRS/UAR76
Year: 2022
Subjects: subject: Sciences humaines et sociales
subject: Histoire des sciences et des technologies
subject: Humanities and Social Sciences
subject: History of Science and Technology

description: Vocabulaire contrôlé utilisé pour l'indexation des références bibliographiques de la base de données FRANCIS "Histoire des sciences et techniques" (1972 à 2015, https://pascal-francis.inist.fr/).
QCaml : Chimie quantique avec OCaml
Creators: name: Scemama, Anthony
Publisher: name: Zenodo
Year: 2023
Subjects: Quantum chemistry
OCaml

description: QCaml est une bibliothèque d'algorithmes pour la chimie quantique.
 Les langages les plus utilisés en chimie quantique sont Fortran, C et
 C++ car les calculs sont souvent très coûteux. On voit apparaître
 depuis une dizaine d'années des codes en Python où la performance est
 réduite mais où l'effort de développement est réduit. OCaml paraît être
 un meilleur choix que Python, car il permet de générer du code
 performant et plus sûr.

 Je montrerai comment OCaml a facilité l'implémentation d'algorithmes
 difficiles à programmer en Fortran. Je montrerai aussi comment QCaml
 peut être utilisé interactivement à l'aide de Notebooks Jupyter ou org-
 mode, pour développer de nouvelles méthodes de calcul, ou bien en mode
 compilé pour réaliser des calculs de production.