cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Li-Yau inequality on graphs
Creators: name: Bauer, Frank
name: Horn, Paul
name: Lin, Yong
name: Lippner, Gabor
name: Mangoubi, Dan
name: Yau, Shing-Tung
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C81, 53C21, 35K05

description: We prove the Li-Yau gradient estimate for the heat kernel on graphs. The only assumption is a variant of the curvature-dimension inequality, which is purely local, and can be considered as a new notion of curvature for graphs. We compute this curvature for lattices and trees and conclude that it behaves more naturally than the already existing notions of curvature. Moreover, we show that if a graph has non-negative curvature then it has polynomial volume growth. We also derive Harnack inequalities and heat kernel bounds from the gradient estimate, and show how it can be used to strengthen the classical Buser inequality relating the spectral gap and the Cheeger constant of a graph.
description: completely rewrote introduction + minor changes and fixes elsewhere
Stability of complex Langevin dynamics in effective models
Creators: name: Aarts, Gert
name: James, Frank A.
name: Pawlowski, Jan M.
name: Seiler, Erhard
name: Sexty, Denes
name: Stamatescu, Ion-Olimpiu
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The sign problem at nonzero chemical potential prohibits the use of importance sampling in lattice simulations. Since complex Langevin dynamics does not rely on importance sampling, it provides a potential solution. Recently it was shown that complex Langevin dynamics fails in the disordered phase in the case of the three-dimensional XY model, while it appears to work in the entire phase diagram in the case of the three-dimensional SU(3) spin model. Here we analyse this difference and argue that it is due to the presence of the nontrivial Haar measure in the SU(3) case, which has a stabilizing effect on the complexified dynamics. The freedom to modify and stabilize the complex Langevin process is discussed in some detail.
description: 29 pages, several eps figures; minor clarifications added, to appear in JHEP
Accretion Disc Particle Accretion in Major Merger Simulations
Creators: name: Wurster, James
name: Thacker, Rob J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A recent approach to simulating localized feedback from active galactic nuclei by Power et al. (2011) uses an accretion disc particle to represent both the black hole and its accretion disc. We have extrapolated and adapted this approach to simulations of Milky Way-sized galaxy mergers containing black holes and explored the impact of the various parameters in this model as well as its resolution dependence. The two key parameters in the model are an effective accretion radius, which determines the radius within which gas particles are added to the accretion disc, and a viscous time-scale which determines how long it takes for material in the accretion disc to accrete on to the black hole itself. We find that there is a limited range of permitted accretion radii and viscous time-scales, with unphysical results produced outside this range. For permitted model parameters, the nuclear regions of simulations with the same resolution follow similar evolutionary paths, producing final black hole masses that are consistent within a factor of two. When comparing the resolution dependence of the model, there is a trend towards higher resolution producing slightly lower mass black holes, but values for the two resolutions studied again agree within a factor of two. We also compare these results to two other AGN feedback algorithms found in the literature. While the evolution of the systems vary, most notably the intermediate total black hole mass, the final black hole masses differ by less than a factor of five amongst all of our models, and the remnants exhibit similar structural parameters. The implication of this accretion model is that, unlike most accretion algorithms, a decoupling of the accretion rate on to the black hole and the local gas properties is permitted and obtained; this allows for black hole growth even after feedback has prevented additional accretion events on to the disc.
description: 17 pages, accepted to MNRAS
Kernel methods on spike train space for neuroscience: a tutorial
Creators: name: Park, Il Memming
name: Seth, Sohan
name: Paiva, Antonio R. C.
name: Li, Lin
name: Principe, Jose C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: Over the last decade several positive definite kernels have been proposed to treat spike trains as objects in Hilbert space. However, for the most part, such attempts still remain a mere curiosity for both computational neuroscientists and signal processing experts. This tutorial illustrates why kernel methods can, and have already started to, change the way spike trains are analyzed and processed. The presentation incorporates simple mathematical analogies and convincing practical examples in an attempt to show the yet unexplored potential of positive definite functions to quantify point processes. It also provides a detailed overview of the current state of the art and future challenges with the hope of engaging the readers in active participation.
description: 12 pages, 8 figures, accepted in IEEE Signal Processing Magazine
title: Pyrrolizidinalkaloidgehalt in getrockneten und tiefgefrorenen Gewürzen und Kräutern zu hoch: Stellungnahme Nr. 017/2019 des BfR vom 13. Mai 2019
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2019
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2019, no. 017
Likelihood of the Power Spectrum in Cosmological Parameter Estimation
Creators: name: Sun, L.
name: Wang, Q.
name: Zhan, H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The likelihood function is a crucial element of parameter estimation. In analyses of galaxy overdensities and weak lensing shear, one often approximates the likelihood of the power spectrum with a Gaussian distribution. The posterior probability derived from such a likelihood deviates considerably from the exact posterior on the largest scales probed by any survey, where the central limit theorem does not apply. We show that various forms of Gaussian likelihoods can have a significant impact on the estimation of the primordial non-Gaussianity parameter f_NL from the galaxy angular power spectrum. The Gaussian plus log-normal likelihood, which has been applied successfully in analyses of the cosmic microwave background, outperforms the Gaussian likelihoods. Nevertheless, even if the exact likelihood of the power spectrum is used, the estimated parameters may be still biased. As such, the likelihoods and estimators need to be thoroughly examined for potential systematic errors.
description: 6 pages, 4 figures; accepted for publication in ApJ
Anomalous currents in driven XXZ chain with boundary twisting at weak coupling or weak driving
Creators: name: Popkov, Vladislav
name: Salerno, Mario
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spin 1/2 XXZ chain driven out of equilibrium by coupling with boundary reservoirs targeting perpendicular spin orientations in XY plane, is investigated. The existence of an anomaly in the nonequilibrium steady state (NESS) at the isotropic point $Δ=1$ is demonstrated both in the weak coupling and weak driving limits. The nature of the anomaly is studied analytically by calculating exact NESS for small system sizes, and investigating steady currents. The spin current at the points $Δ=\pm1$ has a singularity which leads to a current discontinuity when either driving or coupling vanish, and the current of energy develops a twin peak anomaly. The character of singularity is shown to depend qualitatively on whether the system size is even or odd.
description: 9 pages, 3 figures
Strongly real classes in finite unitary groups of odd characteristic
Creators: name: Gates, Zachary
name: Singh, Anupam
name: Vinroot, C. Ryan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20G40, 20E45

description: We classify all strongly real conjugacy classes of the finite unitary group $\U(n, F_q)$ when $q$ is odd. In particular, we show that $g \in \U(n, F_q)$ is strongly real if and only if $g$ is an element of some embedded orthogonal group $O^{\pm}(n, F_q)$. Equivalently, $g$ is strongly real in $\U(n, F_q)$ if and only if $g$ is real and every elementary divisor of $g$ of the form $(t \pm 1)^{2m}$ has even multiplicity. We apply this to obtain partial results on strongly real classes in the finite symplectic group $\Sp(2n, F_q)$, $q$ odd, and a generating function for the number of strongly real classes in $\U(n, F_q)$, $q$ odd, and we also give partial results on strongly real classes in $\U(n, F_q)$ when $q$ is even.
An HI Imaging Survey of Asymptotic Giant Branch Stars
Creators: name: Matthews, L. D.
name: Bertre, T. Le
name: Gerard, E.
name: Johnson, M. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present an imaging study of a sample of eight asymptotic giant branch (AGB) stars in the HI 21-cm line. Using observations from the Very Large Array, we have unambiguously detected HI emission associated with the extended circumstellar envelopes of six of the targets. The detected HI masses range from M_HI ~ 0.015-0.055 M_sun. The HI morphologies and kinematics are diverse, but in all cases appear to be significantly influenced by the interaction between the circumstellar envelope and the surrounding medium. Four stars (RX Lep, Y UMa, Y CVn, and V1942 Sgr) are surrounded by detached HI shells ranging from 0.36 to 0.76 pc across. We interpret these shells as resulting from material entrained in a stellar outflow being abruptly slowed at a termination shock where it meets the local medium. RX Lep and TX Psc, two stars with moderately high space velocities (V_space>56 km/s), exhibit extended gaseous wakes (~0.3 and 0.6 pc in the plane of the sky), trailing their motion through space. The other detected star, R Peg, displays a peculiar "horseshoe-shaped" HI morphology with emission extended on scales up to ~1.7 pc; in this case, the circumstellar debris may have been distorted by transverse flows in the local interstellar medium. We briefly discuss our new results in the context of the entire sample of evolved stars that has been imaged in HI to date.
description: Accepted to AJ. A version with full resolution figures is available at http://www.haystack.mit.edu/hay/staff/lmatthew/matthews_HI_survey.pdf
Electroweak bremsstrahlung in bino-like dark matter annihilations
Creators: name: Shudo, Kenta
name: Nihei, Takeshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the effects of electroweak bremsstrahlung on bino-like neutralino dark matter pair annihilations in the minimal supersymmetric standard model (MSSM). We calculate the nonrelativistic pair annihilation cross sections via $W$-strahlung from leptonic final states, $χχ$ $\to$ $W\ell\barν$, and compare them with the contributions of the relevant two-body final states. We explore the case that sleptons lie below the TeV scale, while squarks are extremely heavy. It is found that the electroweak bremsstrahlung can give a dominant contribution to the cross section for some parameter regions which include slepton coannihilation regions with the observed relic abundance. We also evaluate the neutrino spectra at injection in the Sun. It is shown that energetic neutrinos via weak bremsstrahlung processes can be dominant over contributions of the two-body final states.
description: 22 pages, 11 figures, a paragraph added, footnotes added, typos corrected
Non-linear evolution of the cosmic neutrino background
Creators: name: Villaescusa-Navarro, Francisco
name: Bird, Simeon
name: Peña-Garay, Carlos
name: Viel, Matteo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the non-linear evolution of the relic cosmic neutrino background by running large box-size, high resolution N-body simulations. Our set of simulations explore the properties of neutrinos in a reference $Λ$CDM model with total neutrino masses between 0.05-0.60 eV in cold dark matter haloes of mass $10^{11}-10^{15}$ $h^{-1}$M$_{\odot}$, over a redshift range $z=0-2$. We compute the halo mass function and show that it is reasonably well fitted by the Sheth-Tormen formula. More importantly, we focus on the CDM and neutrino properties of the density and peculiar velocity fields in the cosmological volume, inside and in the outskirts of virialized haloes. The dynamical state of the neutrino particles depends strongly on their momentum: whereas neutrinos in the low velocity tail behave similarly to CDM particles, neutrinos in the high velocity tail are not affected by the clustering of the underlying CDM component. We find that the neutrino (linear) unperturbed momentum distribution is modified and mass and redshift dependent deviations from the expected Fermi-Dirac distribution are in place both in the cosmological volume and inside haloes. The neutrino density profiles around virialized haloes have been carefully investigated and a simple fitting formula is provided. The neutrino profile, unlike the cold dark matter one, is found to be cored with core size and central density that depend on the neutrino mass, redshift and mass of the halo, for halos of masses larger than $\sim 10^{13.5}h^{-1}$M$_{\odot}$. For lower masses the neutrino profile is best fitted by a simple power-law relation in the range probed by the simulations. Our findings are particularly important in view of upcoming large-scale structure surveys, like Euclid, that are expected to probe the non-linear regime at the percent level with lensing and clustering observations.
description: 24 pages, 15 figures, JCAP accepted. Movies can be found at http://som.ific.uv.es/movies
Il rendering non fotorealistico
Creators: name: Verdiani, Giorgio
Publisher: name: Zenodo
Year: 2021
Subjects: Design
product design
rendering
resa grafica
immagine grafica
rendering non fotorealistico

description: Capitolo dedicato al rendering non fotorealistico nel volume "Manuale di Rappresentazione per il Design" a cura di Stefano Bertocci, 2021
Astrochemistry: the issue of molecular complexity in astrophysical environments
Creators: name: De Becker, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Astrochemistry aims at studying chemical processes in astronomical environments. This discipline -- located at the crossroad between astrophysics and chemistry -- is rapidly evolving and explores the issue of the formation of molecules of increasing complexity in particular physical conditions that deviate significantly from those frequently encountered in chemistry laboratories. The main goal of this paper is to provide an overview of this discipline. So far, about 170 molecules have been identified in the interstellar medium (ISM). The presence of this molecular diversity constitutes a firm evidence that efficient formation processes are at work in the interstellar medium. This paper aims at summarizing most of present ideas that are explored by astrochemists to investigate the chemistry taking place in various astronomical environments, with emphasis on the particular conditions which are met in space (including radiation fields, cosmic-rays, low densities...). The more ambitious question of the molecular complexity is addressed following two approaches presented to be converging. The first approach considers the growing complexity starting from the most simple chemical species in interstellar environments, and the second approach envisages successive precursors of the most complex species commonly found on Earth, and in particular in our biochemistry. The issue of molecular complexity constitutes one of the main modern scientific questions addressed by astrochemistry, and it is used as a guideline across this paper.
description: 62 pages, 14 figures
Adaptation and learning of molecular networks as a description of cancer development at the systems-level: Potential use in anti-cancer therapies
Creators: name: Gyurko, David M.
name: Veres, Daniel V.
name: Modos, Dezso
name: Lenti, Katalin
name: Korcsmaros, Tamas
name: Csermely, Peter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: There is a widening recognition that cancer cells are products of complex developmental processes. Carcinogenesis and metastasis formation are increasingly described as systems-level, network phenomena. Here we propose that malignant transformation is a two-phase process, where an initial increase of system plasticity is followed by a decrease of plasticity at late stages of carcinogenesis as a model of cellular learning. We describe the hallmarks of increased system plasticity of early, tumor initiating cells, such as increased noise, entropy, conformational and phenotypic plasticity, physical deformability, cell heterogeneity and network rearrangements. Finally, we argue that the large structural changes of molecular networks during cancer development necessitate a rather different targeting strategy in early and late phase of carcinogenesis. Plastic networks of early phase cancer development need a central hit, while rigid networks of late stage primary tumors or established metastases should be attacked by the network influence strategy, such as by edgetic, multi-target, or allo-network drugs. Cancer stem cells need special diagnosis and targeting, since their dormant and rapidly proliferating forms may have more rigid, or more plastic networks, respectively. The extremely high ability to change their rigidity/plasticity may be a key differentiating hallmark of cancer stem cells. The application of early stage-optimized anti-cancer drugs to late-stage patients may be a reason of many failures in anti-cancer therapies. Our hypotheses presented here underlie the need for patient-specific multi-target therapies applying the correct ratio of central hits and network influences -- in an optimized sequence.
description: 8 pages,2 figures, 1 table, 98 references
TEACHING ENGLISH IN PRIMARY SCHOOLS
Creators: name: Scientientific supervisor: Fayzullayeva Dilnoza Student: Gulimboyeva Farangiz Student of  Samarkand State Institute of Foreign Language
Publisher: name: Zenodo
Year: 2024

description: In this article you may see the lack of English language teachers in primary schools makes teaching English to young learners a challenge. Because of this, primary school instructors are required to teach English in the second, third, and fourth grades even though they lack the necessary educational background and English proficiency. By taking into account elementary school teachers' and English language teachers' shortages. This study looks at the difficulties these primary school teachers had, how they were resolved, and how the course on teaching English to children affected the ideas of prospective teachers. In order to respond to the research questions and analyze the data, which were acquired through unstructured interviews, a cross-sectional qualitative research strategy was adopted in this study.

Key words: international language, language learning process, learning atmosphere, target language.
Open access & visibiity of EU funding Foodsafety4EU Project
Creators: name: Pasquale Del Vecchio
name: Nunzia Cito
name: Veronica Lattanzio
Publisher: name: Zenodo
Year: 2022
Subjects: Open Access, Open Science, H2020

description: The procedure provides guidelines on open access mandatarory pubblication and visibility of FS4EU EU funded project.
Quantum Monte Carlo calculations of electromagnetic moments and transitions in A <= 9 nuclei with meson-exchange currents derived from chiral effective field theory
Creators: name: Pastore, S.
name: Pieper, Steven C.
name: Schiavilla, R.
name: Wiringa, R. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Quantum Monte Carlo calculations of electromagnetic moments and transitions are reported for A <= 9 nuclei. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon potentials are used to generate the nuclear wave functions. Contributions of two-body meson-exchange current (MEC) operators are included for magnetic moments and M1 transitions. The MEC operators have been derived in both a standard nuclear physics approach and a chiral effective field theory formulation with pions and nucleons including up to one-loop corrections. The two-body MEC contributions provide significant corrections and lead to very good agreement with experiment. Their effect is particularly pronounced in the A=9, T=3/2 systems, in which they provide up to 20% (40 %) of the total predicted value for the 9Li (9C) magnetic moment.
description: 17 pages, 7 figures; minor changes with some experimental numbers updated and references added
Antimatroids and Balanced Pairs
Creators: name: Eppstein, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 06A75 (Primary) 06A07 (Secondary)

description: We generalize the 1/3-2/3 conjecture from partially ordered sets to antimatroids: we conjecture that any antimatroid has a pair of elements x,y such that x has probability between 1/3 and 2/3 of appearing earlier than y in a uniformly random basic word of the antimatroid. We prove the conjecture for antimatroids of convex dimension two (the antimatroid-theoretic analogue of partial orders of width two), for antimatroids of height two, for antimatroids with an independent element, and for the perfect elimination antimatroids and node search antimatroids of several classes of graphs. A computer search shows that the conjecture is true for all antimatroids with at most six elements.
description: 16 pages, 5 figures
Testing In Situ Assembly with the Kepler Planet Candidate Sample
Creators: name: Hansen, Brad
name: Murray, Norm
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present a Monte Carlo model for the structure of low mass (total mass < 25 earth mass) planetary systems that form by the in situ gravitational assembly of planetary embryos into final planets. Our model includes distributions of mass, eccentricity, inclination and period spacing that are based on the simulation of a disk of 20 earth masses, forming planets around a solar mass star, and assuming a power law surface density distribution $\propto a^{-1.5}$. The output of the Monte Carlo model is then subjected to the selection effects that mimic the observations of a transiting planet search such as that performed by the Kepler satellite. The resulting comparison of the output to the properties of the observed sample yields an encouraging agreement in terms of the relative frequencies of multiple planet systems and the distribution of the mutual inclinations, when moderate tidal circularisation is taken into account. The broad features of the period distribution and radius distribution can also be matched within this framework, although the model underpredicts the distribution of small period ratios. This likely indicates that some dissipation is still required in the formation process. The most striking deviation between model and observations is in the ratio of single to multiple systems, in that there are roughly 50% more single planet candidates observed than are produced in any model population. This suggests that some systems must suffer additional attrition to reduce the number of planets or increase the range of inclinations.
description: 19 pages, 22 figures. submitted to ApJ
Direct connection between the different QCD orders for parton distribution and fragmentation functions
Creators: name: Shevchenko, O. Yu.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The formulas directly connecting parton distribution functions (PDFs) and fragmentation functions (FFs) at the next to leading order (NLO) QCD with the same quantities at the leading order (LO) are derived. These formulas are universal, i.e. have the same form for all kinds of PDFs and FFs, differing only in the respective splitting functions entering there.
Nonequilibrium microcanonical and canonical ensembles and their equivalence
Creators: name: Chetrite, Raphael
name: Touchette, Hugo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Generalizations of the microcanonical and canonical ensembles for paths of Markov processes have been proposed recently to describe the statistical properties of nonequilibrium systems driven in steady states. Here we propose a theory of these ensembles that unifies and generalizes earlier results, and show how it is fundamentally related to the large deviation properties of nonequilibrium systems. Using this theory, we provide conditions for the equivalence of nonequilibrium ensembles, generalizing those found for equilibrium systems, construct driven physical processes that generate these ensembles, and re-derive in a simple way known and new product rules for their transition rates. A nonequilibrium diffusion model is used to illustrate these results.
description: v1: 5 pages, revtex, 1 figure; v2: minor corrections, some references added
Electronic properties of the MoS2-WS2 heterojunction
Creators: name: Kośmider, Krzysztof
name: Fernández-Rossier, Joaquín
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the electronic structure of a heterojunction made of two monolayers of MoS2 and WS2. Our first-principles density functional calculations show that, unlike in the homogeneous bilayers, the heterojunction has an optically active band-gap, smaller than the ones of MoS2 and WS2 single layers. We find that that the optically active states of the maximum valence and minimum conduction bands are localized on opposite monolayers, and thus the lowest energy electron-holes pairs are spatially separated. Our findings portrait the MoS2-WS2 bilayer as a prototypical example for band-gap engineering of atomically thin two-dimensional semiconducting heterostructures.
Zero interface tension at the deconfining phase transition for a matrix model of a $SU(\infty)$ gauge theory
Creators: name: Lin, Shu
name: Pisarski, Robert D.
name: Skokov, Vladimir V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using a matrix model, we model the deconfining phase transition at nonzero temperature for a SU(N) gauge theory at large $N$. At infinite $N$ the matrix model exhibits a Gross-Witten-Wadia transition. We show that as a consequence, both the order-disorder and the order-order interface tensions vanish identically at the critical temperature $T_d$. We estimate how these quantities vanish in the matrix model as $T \rightarrow T_d$ and as $N \rightarrow \infty$. The numerical solution of the matrix model suggests possible non-monotonic behavior in $N$ for relatively small values of $N \sim 5$.
description: 21 pages, 4 figures
Data and code for "Contrasting effects of living and legacy density dependence on seedling and tree survival in a subtropical forest".
Creators: name: Gao, Junfeng
name: Zhang, Yue
name: Yao, Yujun
name: Petticord, Daniel F.
name: Mi, Xiangcheng
name: Ren, Haibao
name: Chen, Lei
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 300702
subject: Forest biodiversity

description: This document provides all necessary data and code for creating the figures and tables for the paper "Contrasting effects of living and legacy density dependence on seedling and tree survival in a subtropical forest".
On metric characterizations of the Radon-Nikodým and related properties of Banach spaces
Creators: name: Ostrovskii, Mikhail I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: Primary: 46B22, Secondary: 05C12, 30L05, 46B10, 46B85, 54E35

description: We find a class of metric structures which do not admit bilipschitz embeddings into Banach spaces with the Radon-Nikodým property. Our proof relies on Chatterji's (1968) martingale characterization of the RNP and does not use the Cheeger's (1999) metric differentiation theory. The class includes the infinite diamond and both Laakso (2000) spaces. We also show that for each of these structures there is a non-RNP Banach space which does not admit its bilipschitz embedding. We prove that a dual Banach space does not have the RNP if and only if it admits a bilipschitz embedding of the infinite diamond. The paper also contains related characterizations of reflexivity and the infinite tree property.
Spin-flip transitions and departure from the Rashba model in the Au(111) surface
Creators: name: Ibañez-Azpiroz, Julen
name: Bergara, Aitor
name: Sherman, Evgeny Ya.
name: Eiguren, Asier
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a detailed analysis of the spin-flip excitations induced by a periodic time-dependent electric field in the Rashba prototype Au(111) noble metal surface. Our calculations incorporate the full spinor structure of the spin-polarized surface states and employ a Wannier-based scheme for the spin-flip matrix elements. We find that the spin-flip excitations associated with the surface states exhibit an important angular modulation which is completely absent in the standard Rashba model \cite{rashba}. Furthermore, we demonstrate that the maximum of the calculated spin-flip absorption rate is about twice the model prediction. These results show that although the Rashba model accurately describes the spectrum and spin polarization, it does not fully account for the dynamical properties of the surface states.
Dust particles in mean motion resonances influenced by an interstellar gas flow
Creators: name: Pastor, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The orbital evolution of a dust particle captured in a mean motion resonance with a planet in circular orbit under the action of the Poynting-Robertson effect, radial stellar wind and an interstellar gas flow of is investigated. The secular time derivative of Tisserand parameter is analytically derived for arbitrary orbit orientation. From the secular time derivative of Tisserand parameter a general relation between the secular time derivatives of eccentricity and inclination is obtained. In the planar case (the case when the initial dust particle position vector, initial dust particle velocity vector and interstellar gas velocity vector lie in the planet orbital plane) is possible to calculate directly the secular time derivative of eccentricity. Using numerical integration of equation of motion we confirmed our analytical results in the three-dimensional case and also in the planar case. Evolutions of eccentricity of the dust particle captured in an exterior mean motion resonance under the action of the Poynting-Robertson effect, radial stellar wind for the cases with and without the interstellar gas flow are compared. Qualitative properties of the orbital evolution in the planar case are determined. Two main groups of the secular orbital evolutions exist. In the first group the eccentricity and argument of perihelion approach to some values. In the second group the eccentricity oscillates and argument of perihelion rapidly shifts.
description: 13 pages, 7 figures, in v3 some text improved, submitted to MNRAS
Skills4EOSC e le reti professionali dei Data Steward per lo sviluppo della scienza aperta
Creators: name: Di Giorgio, Sara
name: Caldoni, Giulia
Publisher: name: Zenodo
Year: 2023
Subjects: Open Science
Data Steward
FAIR principles

description: Presentazione per la conferenza annuale GARR “Saperi interconnessi. Infrastrutture per una scienza ad alte prestazioni”, che si è svolta dal 14 al 16 giugno al campus di Novoli dell’Università di Firenze.
 Include una breve introduzione al progetto e i primi risultati del sondaggio sulla presenza dei Data Steward all'interno di università e istituti di Ricerca in Italia.
Discontinuities without discontinuity: The Weakly-enforced Slip Method
Creators: name: van Zwieten, G. J.
name: van Brummelen, E. H.
name: van der Zee, K. G.
name: Gutiérrez, M. A.
name: Hanssen, R. F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Tectonic faults are commonly modelled as Volterra or Somigliana dislocations in an elastic medium. Various solution methods exist for this problem. However, the methods used in practice are often limiting, motivated by reasons of computational efficiency rather than geophysical accuracy. A typical geophysical application involves inverse problems for which many different fault configurations need to be examined, each adding to the computational load. In practice, this precludes conventional finite-element methods, which suffer a large computational overhead on account of geometric changes. This paper presents a new non-conforming finite-element method based on weak imposition of the displacement discontinuity. The weak imposition of the discontinuity enables the application of approximation spaces that are independent of the dislocation geometry, thus enabling optimal reuse of computational components. Such reuse of computational components renders finite-element modeling a viable option for inverse problems in geophysical applications. A detailed analysis of the approximation properties of the new formulation is provided. The analysis is supported by numerical experiments in 2D and 3D.
description: Submitted for publication in CMAME
Controlling light in scattering media noninvasively using the photo-acoustic transmission-matrix
Creators: name: Chaigne, T.
name: Katz, O.
name: Boccara, A. C.
name: Fink, M.
name: Bossy, E.
name: Gigan, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical wavefront-shaping has emerged as a powerful tool to manipulate light in strongly scattering media. It enables diffraction-limited focusing and imaging at depths where conventional microscopy techniques fail. However, while most wavefront-shaping works to-date exploited direct access to the target or implanted probes, the challenge is to apply it non-invasively inside complex samples. Ultrasonic-tagging techniques have been recently demonstrated but these require a sequential point-by- point acquisition, a major drawback for imaging applications. Here, we introduce a novel approach to non-invasively measure the optical transmission-matrix inside a scattering medium, exploiting the photo-acoustic effect. Our approach allows for the first time to simultaneously discriminate, localize, and selectively focus light on multiple targets inside a scattering sample, as well as to recover and exploit the scattering medium properties. Combining the powerful approach of the transmission-matrix with the advantages of photoacoustic imaging opens the path towards deep-tissue imaging and light-delivery utilizing endogenous optical contrast.
ACCESS-Background rate of adverse events-definition -thrombocytopenia
Creators: name: Sturkenboom, M
name: Willame, C
name: Duran, C
name: Belchabir, L
Publisher: name: Zenodo
Year: 2021
Subjects: electronic health care databases, codes, AESI, vaccine

description: This document contains the definition of Thrombocytopenia and the operationalization to extract this event from different electronic health care databases in the EU, to calculate background rates of AESI The document contains the key definition, procedures and treatments, the diagnosis codes based on Codemapper output with changes/additions by data access providers, and when available published validation studies and background rates
description: This study (ACCESS project) was funded by the European Medicines Agency
Next-to-leading order thermal photon production in a weakly coupled quark-gluon plasma
Creators: name: Ghiglieri, Jacopo
name: Hong, Juhee
name: Kurkela, Aleksi
name: Lu, Egang
name: Moore, Guy D.
name: Teaney, Derek
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We compute the next-to-leading order O(g) correction to the thermal photon production rate in a QCD plasma. The NLO contributions can be expressed in terms of gauge invariant condensates on the light cone, which are amenable to novel sum rules and Euclidean techniques. We expect these technologies to be generalizable to other NLO calculations. For the phenomenologically interesting value of alpha_s=0.3, the NLO correction represents a 20% increase and has a functional form similar to the LO result.
description: 41 pages plus appendices, 23 figures
title: Research into Motivational Factors of Work Done by University Teachers from the Perspective  of the Theory of Generations
Creators: name: V. Arkhipov, Sergey
name: E. N. , Vanchikova
name: N. A., Zolotareva
name: A. E. , Yantranov
name: D. T. , Budaeva
Publisher: name: TEM Journal
Year: 2019

description: The article is devoted to the study of the main motivational factors that determine the teacher’s work from the position of the Strauss-Howe generational theory. In the course of the research, the experience of organizing the activities of a teacher of a university in the Republic of Buryatia, the authors identified imbalances in the structure of employment towards extracurricular activities, which significantly reduces the efficiency of the teacher’s work and their motivation for teaching. The current situation is fraught with negative consequences, and the administration of the universities must constantly adapt and apply latest educational technologies together with the system of teacher’s work stimulation, both material and non-material.
STARLIB: A Next-Generation Reaction-Rate Library for Nuclear Astrophysics
Creators: name: Sallaska, A. L.
name: Iliadis, C.
name: Champagne, A. E.
name: Goriely, S.
name: Starrfield, S.
name: Timmes, F. X.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: STARLIB is a next-generation, all-purpose nuclear reaction-rate library. For the first time, this library provides the rate probability density at all temperature grid points for convenient implementation in models of stellar phenomena. The recommended rate and its associated uncertainties are also included. Currently, uncertainties are absent from all other rate libraries, and, although estimates have been attempted in previous evaluations and compilations, these are generally not based on rigorous statistical definitions. A common standard for deriving uncertainties is clearly warranted. STARLIB represents a first step in addressing this deficiency by providing a tabular, up-to-date database that supplies not only the rate and its uncertainty but also its distribution. Because a majority of rates are lognormally distributed, this allows the construction of rate probability densities from the columns of STARLIB. This structure is based on a recently suggested Monte Carlo method to calculate reaction rates, where uncertainties are rigorously defined. In STARLIB, experimental rates are supplemented with: (i) theoretical TALYS rates for reactions for which no experimental input is available, and (ii) laboratory and theoretical weak rates. STARLIB includes all types of reactions of astrophysical interest to Z = 83, such as (p,g), (p,a), (a,n), and corresponding reverse rates. Strong rates account for thermal target excitations. Here, we summarize our Monte Carlo formalism, introduce the library, compare methods of correcting rates for stellar environments, and discuss how to implement our library in Monte Carlo nucleosynthesis studies. We also present a method for accessing STARLIB on the Internet and outline updated Monte Carlo-based rates.
description: Accepted for publication in the Astrophysical Journal Supplement Series; 96 pages, 22 figures
title: Concept Map Mining Approach Based on the Mental Models Retrieval
Creators: name: Nacheva, Radka
name: Todoranova, Latinka
name: Sulova, Snezhana
name: Penchev, Bonimir
Publisher: name: TEM Journal
Year: 2019

description: Studying the mental models of software users is not a new topic in the scientific literature, but we could point out that it is also not sufficiently researched. Still there is no universal method which could be used for exploration and visual presentation of mental models. Therefore, the aim of the current article is to propose an approach for concept map mining based on retrieving users’ mental models. To achieve this, a combination of text mining techniques and concept map software is used in the research article.
FAIRsharing Community Curation: Mapping the Social Sciences Resource Landscape
Creators: name: Lister, Allyson
Publisher: name: Zenodo
Year: 2022

description: FAIRsharing is an informative and educational resource on interlinked standards, databases and policies, three key elements of the FAIR ecosystem. FAIRsharing is adopted by funders, publishers and communities across all research disciplines. It promotes the existence and value of these resources to aid data discovery, interoperability and sharing across all of our stakeholder groups. Enabling FAIR data is a key role within FAIRsharing, and we work with a variety of stakeholders (funders, researchers, research support such as librarians and data stewards, publishers, and resource developers) throughout the data management lifecycle to achieve this goal. Here we will discuss how FAIRsharing can be searched and updated by our user community, and how the social sciences in particular can make the best use out of it as part of a broader data management infrastructure. We also will discuss the benefits of both in-house curation and community-driven curation provided by our stakeholder groups. Finally, we will show you how to take part and contribute to the development of the description of databases and standards within FAIRsharing through our Community Curation Programme (https://fairsharing.org/community_curation).
Xiphomyrmex Forel 1887
Creators: name: Forel, A.
Publisher: name: L'Imprimerie Nationale
Year: 1891
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Xiphomyrmex

description: Sous-Genre XIPHOMYRMEX, Forel.
Antennes des [[worker]] et des [[queen]] de onze articles.
description: Published as part of Forel, A., 1891, Histoire naturelle des Hymenopteres. Deuxieme partie: Les Formicides., pp. 1-231 in Histoire Physique, Naturelle et Politique de Madagascar., Paris :L'Imprimerie Nationale on page 153, DOI: 10.5281/zenodo.9896
title: Critical Evaluation on the Importance of Aspects regarding Human Resource Development  for Organization Strip
Creators: name: Al-Sakafi, Layth Zuhair
name: Saeed Al-Hamami, Zain Mohammed
name: Salih Ali, Nabeel
Publisher: name: TEM Journal
Year: 2019

description: The fundamental aim of HRD is to improve the resource capability of an organization in a way that it will lead to the attainment of optimum level of work performance. Thus, HRD seeks to develop employees in order to improve their competences that will lead to the improvement in organizational performance, and thus contributing to the achievement of competitive advantage. In this article, three aspects namely Learning Styles, Training Needs Analysis and Training Evaluation are investigated critically in order to shed light of their significances in Human Resource Development for Organization strip and achieve competitive advantage in an organization. Also, a new framework in an effective HRD system based on the works of literature is proposed. Besides, a comparison points our proposal in respect of the state of art in HRD system aspects is conducted. The results pointed out three aspects as crucial elements in the HRD system that can be deployed successfully in the industrial domain to enhance organizational effectiveness.
Rape is cheaper than bullets: sexual violence as a method of warfare : case study of the Democratic Republic of Congo
Creators: name: Sommer, Isabelle
Publisher: name: My University
Year: 2009
Subjects: international criminal law
rape
Congo
sex crimes
violence against women

description: Second semester University: Ruhr University Bochum.
description: In the Democratic Republic of Congo (DRC), women and girls are systematically kidnapped, raped, mutilated and tortured by soldiers from both foreign militias and State security forces. The aim of this thesis is to unravel the reasons why sexual violence in the DRC continues unabated with such horrendous brutality and immense prevalence despite its clear prohibition in International Law and the official end of the conflict in 2003. It will be argued that sexual violence against Congolese women and girls persists because the different actors use it as an effective method of warfare in their struggle for economic and political power. Sexual violence is applied strategically and tactically to advance specific objectives such as to enhance a soldier’s conception of power, superiority and masculinity, to be part of a strategy of ethnic cleansing, to humiliate and terrorize the targeted population, to revenge and punish as well as to destroy the entire society and culture by inflicting trauma and terror. These concepts of sexual violence as a method of warfare will be related to the incidents in the DRC in order to generate an analytical framework for the investigation of the persistence of sexual violence. Legal, political, societal and institutional factors will also be included in the analysis in order to have a holistic approach towards the subject.