cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The quasi-adiabatic relaxation of haloes in the IllustrisTNG and EAGLE cosmological simulations
Creators: name: Velmani, Premvijay
name: Paranjape, Aseem
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The dark matter content of a gravitationally bound halo is known to be affected by the galaxy and gas it hosts. We characterise this response for haloes spanning over four orders of magnitude in mass in the hydrodynamical simulation suites IllustrisTNG and EAGLE. We present simple fitting functions in the spherically averaged quasi-adiabatic relaxation framework that accurately capture the dark matter response over the full range of halo mass and halo-centric distance we explore. We show that commonly employed schemes, which consider the relative change in radius $r_f/r_i-1$ of a spherical dark matter shell to be a function of only the relative change in its mass $M_i/M_f-1$, do not accurately describe the measured response of most haloes in IllustrisTNG and EAGLE. Rather, $r_f/r_i$ additionally explicitly depends upon halo-centric distance $r_f/R_{\rm vir}$ for haloes with virial radius $R_{\rm vir}$, being very similar between IllustrisTNG and EAGLE and across halo mass. We also account for a previously unmodelled effect, likely driven by feedback-related outflows, in which shells having $r_f/r_i\simeq1$ (i.e., no relaxation) have $M_i/M_f$ significantly different from unity. Our results are immediately applicable to a number of semi-analytical tools for modelling galactic and large-scale structure. We also study the dependence of this response on several halo and galaxy properties beyond total mass, finding that it is primarily related to halo concentration and star formation rate. We discuss possible extensions of these results to build a deeper physical understanding of the small-scale connection between dark matter and baryons.
description: 21 pages, 17 figures; v2: added discussion, accepted in MNRAS
Asteroseismology of RXJ 2117+3412, the hottest pulsating PG 1159 star
Creators: name: Nather, R. E.
name: Hansen, C. J.
name: Barstow, M.
name: Jiang, S. Y.
name: Chernyshev, A. V.
name: Chevreton, M.
name: Pfeiffer, B.
name: Clemens, J. C.
name: Serre, B.
name: Bruvold, A.
name: Yanagida, K.
name: Wood, M. A.
name: Dolez, N.
name: Winget, D. E.
name: Provencal, J.
name: Nitta Kleinman, A.
name: Meistas, E. G.
name: Hemar, S.
name: Sansom, A. E.
name: Kawaler, S. D.
name: Watson, T. K.
name: Krzesinski, J.
name: Dixson, J. S.
name: Klumpe, E. W.
name: Pajdosz, G.
name: Belmonte, J. A.
name: Marar, T. M.K.
name: Vauclair, G.
name: Solheim, J. E.
name: Grauer, A. D.
name: Bradley, P. A.
name: Zola, S.
name: Moskalik, P.
name: Kanaan, A.
name: Kleinman, S. J.
name: Giovannini, O.
name: Kepler, S. O.
name: Fu, J. N.
name: Mazeh, T.
name: Leibowitz, E.
name: Ashoka, B. N.
name: O'Brien, M. S.
name: Achilleos, N.
name: Montgomery, M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: The pulsating PG 1159 planetary nebula central star RXJ 2117+3412 has been observed over three successive seasons of a multisite photometric campaign. The asteroseismological analysis of the data, based on the 37 identified
Time-resolved optical spectroscopy of the pulsating DA white dwarfHS 0507+0434B: New constraints on mode identification and pulsation properties
Creators: name: Clemens, J. C.
name: Van Kerkwijk, M. H.
name: Kotak, R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: We present a detailed analysis of time-resolved optical spectra of the ZZ Ceti white dwarf, HS 0507+0434B. Using the wavelength dependence of observed mode amplitudes, we deduce the spherical degree,
Unsteady ballistic heat transport in a 1D harmonic crystal due to a source on an isotopic defect
Creators: name: Shishkina, Ekaterina V.
name: Gavrilov, Serge N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the paper we apply asymptotic technique based on the method of stationary phase and obtain the approximate analytical description of thermal motions caused by a source on an isotopic defect of an arbitrary mass in a 1D harmonic crystal. It is well known that localized oscillation is possible in this system in the case of a light defect. We consider the unsteady heat propagation and obtain formulae, which provide continualization (everywhere excepting a neighbourhood of a defect) and asymptotic uncoupling of the thermal motion into the sum of the slow and fast components. The slow motion is related with ballistic heat transport, whereas the fast motion is energy oscillation related with transformation of the kinetic energy into the potential one and in the opposite direction. To obtain the propagating component of the fast and slow motions we estimate the exact solution in the integral form at a moving point of observation. We demonstrate that the propagating parts of the slow and the fast motions are "anti-localized" near the defect. The physical meaning of the anti-localization is a tendency for the unsteady propagating wave-field to avoid a neighbourhood of a defect. The effect of anti-localization increases with the absolute value of the difference between the alternated mass and the mass of a regular particle, and, therefore, more energy concentrates just behind the leading wave-front of the propagating component. The obtained solution is valid in a wide range of a spatial co-ordinate (i.e., a particle number), everywhere excepting a neighbourhood of the leading wavefront.
description: 29 pages, 7 figures
L-spaces, taut foliations, and graph manifolds
Creators: name: Hanselman, Jonathan
name: Rasmussen, Jacob
name: Rasmussen, Sarah Dean
name: Watson, Liam
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: If $Y$ is a closed orientable graph manifold, we show that $Y$ admits a coorientable taut foliation if and only if $Y$ is not an L-space. Combined with previous work of Boyer and Clay, this implies that $Y$ is an L-space if and only if $π_1(Y)$ is not left-orderable.
description: 10 pages, 1 figure; version 3 is accepted version, to appear in Compositio Mathematica
A new look at the pulsating DB white dwarf GD 358: Line-of-sight velocity measurements and constraints on model atmospheres
Creators: name: Clements, J. C.
name: Van Kerkwijk, M. H.
name: Koester, D.
name: Kotak, R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003

description: We report on our findings of the bright, pulsating, helium atmosphere white dwarf GD 358, based on time-resolved optical spectrophotometry. We identify 5 real pulsation modes and at least 6 combination modes at frequencies consistent with those found in previous observations. The measured Doppler shifts from our spectra show variations with amplitudes of up to 5.5
A puzzling periodicity in the pulsating  DA white dwarf G 117-B15A
Creators: name: Clemens, J. C.
name: Kotak, R.
name: Van Kerkwijk, M. H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004

description: We present time-resolved optical spectrophotometry of the pulsating hydrogen atmosphere (DA) white dwarf G 117-B15A. We find three periodicities in the pulsation spectrum (215 s, 272 s, and 304 s) all of which have been found in earlier studies. By comparing the fractional wavelength dependence of the pulsation amplitudes (chromatic amplitudes) with models, we confirm a previous report that the strongest mode, at 215 s, has
ESM 2 from Trust thy neighbour in times of trouble: background risk alters how tadpoles release and respond to disturbance cues
Creators: name: Bairos-Novak, Kevin R.
name: Mitchell, Matthew D.
name: Crane, Adam L.
name: Chivers, Douglas P.
name: Ferrari, Maud C. O.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Diagram illustrating the experimental design used. Boxes with a red outline indicate high background risk (HR) (e.g. cues from high background risk individuals, or high-risk individuals themselves), while boxes in blue indicate low background risk (LR). The circle-shaped cue represents undisturbed cue (UC) taken from tadpoles after 10 minutes without disturbance, while the star-shaped cue represents disturbance cues (DC) extracted by chasing individuals using a glass rod for 1 minute. Tadpoles were either used for cue extraction or tested once and were subsequently removed from the experiment.
BVRIJK light curves and radial velocity curves for selected Magellanic Cloud Cepheids $\!^{,}\!$
Creators: name: Gieren, W. P.
name: Madore, B. F.
name: Freedman, W. L.
name: Storm, J.
name: Carney, B. W.
name: Fouqué, P.
name: Habgood, M. J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004

description: We present high precision and well sampled BVRIJK light curves and radial velocity curves for a sample of five Cepheids in the SMC. In addition we present radial velocity curves for three Cepheids in the LMC. The low metallicity (Fe/H ~ -0.7) SMC stars have been selected for use in a Baade-Wesselink type analysis to constrain the metallicity effect on the Cepheid Period-Luminosity relation. The stars have periods of around 15 days so they are similar to the Cepheids observed by the Extragalactic Distance Scale Key Project on the Hubble Space Telescope. We show that the stars are representative of the SMC Cepheid population at that period and thus will provide a good sample for the proposed analysis. The actual Baade-Wesselink analysis are presented in a companion paper. Comment: Accepted for publication in A&A, 23 pages, 10 figures, data tables will be made available electronically from the CDS
Supplementary Material from Anthropogenic noise pollution from pile-driving disrupts the structure and dynamics of fish shoals.
Creators: name: Herbert-Read, James E.
name: Lousie Kremer
name: Bruintjes, Rick
name: Radford, Andrew N.
name: Ioannou, Christos C.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: Noise produced from a variety of human activities can affect the physiology and behaviour of individual animals, but whether noise disrupts the social behaviour of animals is largely unknown. Animal groups such as flocks of birds or shoals of fish use simple interaction rules to coordinate their movements with near neighbours. In turn, this coordination allows individuals to gain the benefits of group living such as reduced predation risk and social information exchange. Noise could change how individuals interact in groups if noise is perceived as a threat, or if it masked, distracted or stressed individuals, and this could have impacts on the benefits of grouping. Here, we recorded trajectories of individual juvenile seabass (Dicentrarchus labrax) in groups under controlled laboratory conditions. Groups were exposed to playbacks of either ambient background sound recorded in their natural habitat, or playbacks of pile-driving, commonly used in marine construction. The pile-driving playback affected the structure and dynamics of the fish shoals significantly more than the ambient-sound playback. Compared to the ambient-sound playback, groups experiencing the pile-driving playback became less cohesive, less directionally ordered, and were less correlated in speed and directional changes. In effect, the additional-noise treatment disrupted the abilities of individuals to coordinate their movements with one another. Our work highlights the potential for noise pollution from pile-driving to disrupt the collective dynamics of fish shoals, which could have implications for the functional benefits of groups' collective behaviour.
Viscous Flow in a 1D Spin-Polarized Fermi Gas: the Role of Integrability on Viscosity
Creators: name: Maki, Jeff
name: Zhang, Shizhong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The transport properties of one-dimensional Fermi gases at low-temperatures are often described by the Luttinger liquid (LL) model. However, to study dissipation one needs to examine interactions beyond the LL model. In this work we provide a simple model which allows for a direct microscopic calculation of the bulk viscosity, namely the one dimensional spin polarized p-wave Fermi gas. We calculate the bulk viscosity in both the high- and low-temperature limits. We find that the bulk viscosity is finite and consistent with the requirement of scale symmetry, in spite of the inherent integrability of the microscopic model. We argue how integrability does not forbid a finite bulk viscosity, and compare our work to previous kinetic theory calculations.
description: 5 pages of main text, 8 pages of Supplementary materials, 2 figures
Additional file 1 of Intermittent hypoxia in a mouse model of apnea of prematurity leads to a retardation of cerebellar development and long-term functional deficits
Creators: name: Leroux, S.
name: Rodriguez-Duboc, A.
name: Arabo, A.
name: Basille-Dugay, M.
name: Vaudry, D.
name: Burel, D.
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Table S1. Full statistical summary of RT-qPCR data.
Independent Sets, Matchings, and Occupancy Fractions
Creators: name: Davies, Ewan
name: Jenssen, Matthew
name: Perkins, Will
name: Roberts, Barnaby
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We prove tight upper bounds on the logarithmic derivative of the independence and matching polynomials of d-regular graphs. For independent sets, this theorem is a strengthening of the results of Kahn, Galvin and Tetali, and Zhao showing that a union of copies of $K_{d,d}$ maximizes the number of independent sets and the independence polynomial of a d-regular graph. For matchings, this shows that the matching polynomial and the total number of matchings of a d-regular graph are maximized by a union of copies of $K_{d,d}$. Using this we prove the asymptotic upper matching conjecture of Friedland, Krop, Lundow, and Markström. In probabilistic language, our main theorems state that for all d-regular graphs and all $λ$, the occupancy fraction of the hard-core model and the edge occupancy fraction of the monomer-dimer model with fugacity $λ$ are maximized by $K_{d,d}$. Our method involves constrained optimization problems over distributions of random variables and applies to all d-regular graphs directly, without a reduction to the bipartite case.
description: Typo corrected last equation pg 1
Observations of the Pulsating White Dwarf G 185–32
Creators: name: Barstow, M. A.
name: Yanagida, K.
name: O'Donoghue, D.
name: Sullivan, D. J.
name: Krzensiński, J.
name: Kanaan, A.
name: Montgomery, M. H.
name: Pajdosz, G.
name: Mazeh, T.
name: Dolez, N.
name: Dixson, J. S.
name: Meištas, E.
name: Bruvold, A.
name: Zola, S.
name: Solheim, J. E.
name: Buckley, D.
name: Winget, D. E.
name: Provencal, J.
name: Hansen, C. J.
name: Clemens, J. C.
name: Katz, M.
name: Kawaler, S. D.
name: Watson, T. K.
name: Nather, R. E.
name: Wood, M. A.
name: Giovannini, O.
name: Vauclair, G.
name: Kleinman, S. J.
name: Moskalik, P.
name: Kepler, S. O.
name: Chevreton, M.
name: Castanheira, B. G.
name: Bradley, P. A.
name: Koester, D.
name: Leibowitz, E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004

description: We observed the pulsating hydrogen atmosphere white dwarf G 185-32 with the Whole Earth Telescope in 1992. We report on a weighted Fourier transform of the data detecting 18 periodicities in its light curve. Using the Hubble Space Telescope Faint Object Spectrograph time resolved spectroscopy, and the wavelength dependence of the relative amplitudes, we identify the spherical harmonic degree (
Polaritonic Chern insulators in monolayer semiconductors
Creators: name: He, Li
name: Wu, Jingda
name: Jin, Jicheng
name: Mele, Eugene J.
name: Zhen, Bo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Systems with strong light-matter interaction opens up new avenues for studying topological phases of matter. Examples include exciton-polaritons, mixed light-matter quasiparticles, where the topology of the polaritonic band structure arises from the collective coupling between matter wave and optical fields strongly confined in periodic dielectric structures. Distinct from light-matter interaction in a uniform environment, the spatially varying nature of the optical fields leads to a fundamental modification of the well-known optical selection rules, which were derived under the plane wave approximation. Here we identify polaritonic Chern insulators by coupling valley excitons in transition metal dichalcogenides (TMDs) to photonic Bloch modes in a dielectric photonic crystal (PhC) slab. We show that polaritonic Dirac points (DPs), which are markers for topological phase transition points, can be constructed from the collective coupling between valley excitons and photonic Dirac cones in the presence of both time-reversal and inversion symmetries. Lifting exciton valley degeneracy by breaking time-reversal symmetry leads to gapped polaritonic bands with non-zero Chern numbers. Through numerical simulations, we predict polaritonic chiral edge states residing inside the topological gaps. Our work paves the way to further explore polaritonic topological phases and their practical applications in polaritonic devices.
{epub descargar} SAMUEL ROS, UN NOMBRE EN EL AZULEJO
Creators: name: Mccall
Publisher: name: Zenodo
Year: 2024

description: SAMUEL ROS, UN NOMBRE EN EL AZULEJO de VICENTE JAVIER MENGO LLORET

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SAMUEL ROS, UN NOMBRE EN EL AZULEJO

VICENTE JAVIER MENGO LLORET

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788411994798

Editorial: CIRCULO ROJO

Año de edición: 2023

 

 

 

 

 

Descarga electrónica de libros electrónicos gratis. SAMUEL ROS, UN NOMBRE EN EL AZULEJO (Literatura española) FB2 ePub de VICENTE JAVIER MENGO LLORET 9788411994798

 

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Su temprana muerte y su pertenencia ideológica ocultaron aparentemente laobra literaria del escritor valenciano Samuel Ros Pardo (Valencia, 1904-Madrid,1945), Premio Nacional de Literatura (1943). El presente libro, repleto de datosinéditos, nos da las claves biográficas para acercarnos a los con...
[PDF] Fluide Glacial download
Creators: name: Frazier
Publisher: name: Zenodo
Year: 2024

description: Fluide Glacial pan

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Fluide Glacial

 

Nb. de pages: 84

Format: Pdf, ePub, MOBI, FB2

ISBN: 9782378782856

Editeur: Fluide Glacial

Date de parution: 2019

 

 

 

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Au bout de 41 ans d'existence, Fluide Glacial est le leader incontesté des magazines de BD en France. Chaque mois, le champion toutes catégories de l'humour et de la bande dessinée vous propose chaque mois 84 pages inédites de poilade à toutes les sauces. Toujours plus haut, toujours plus loin, toujours plus drôle!!!!
The Distance-Decay Function of Geographical Gravity Model: Power Law or Exponential Law?
Creators: name: Chen, Yanguang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The distance-decay function of the geographical gravity model is originally an inverse power law, which suggests a scaling process in spatial interaction. However, the distance exponent of the model cannot be explained with the ideas from Euclidean geometry. This results in what is called dimension dilemma. In particular, the gravity model based on power law could not be derived from general principles by traditional ways. Consequently, a negative exponential function substituted for the inverse power function to serve for a distance-decay function for the gravity model. However, the exponential-based gravity model goes against the first law of geography. This paper is devoted to solve these kinds of problems by mathematical reasoning and empirical analysis. First, it can be proved that the distance exponent of the gravity model is essentially a fractal dimension. Thus the dimensional dilemma of the power-based gravity model can be resolved using the concepts from fractal geometry. Second, the exponential function indicates locality and localization, which violates the basic principle of spatial interaction. The power function implies action at a distance, which is the necessary condition of geographical gravitation. Third, the gravity model based on power law decay can be derived from the entropy- maximizing principle by introducing a proper postulate. The observational data of China's cities and regions are employed to verify the theoretical inferences, and the results support power-law distance decay. A conclusion can be reached that the preferred form of geographical gravity model is its original form, which is based on an inverse power law rather than a negative exponential law.
Texture Generation Using A Graph Generative Adversarial Network And Differentiable Rendering
Creators: name: KC, Dharma
name: Morrison, Clayton T.
name: Walls, Bradley
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.5

description: Novel photo-realistic texture synthesis is an important task for generating novel scenes, including asset generation for 3D simulations. However, to date, these methods predominantly generate textured objects in 2D space. If we rely on 2D object generation, then we need to make a computationally expensive forward pass each time we change the camera viewpoint or lighting. Recent work that can generate textures in 3D requires 3D component segmentation that is expensive to acquire. In this work, we present a novel conditional generative architecture that we call a graph generative adversarial network (GGAN) that can generate textures in 3D by learning object component information in an unsupervised way. In this framework, we do not need an expensive forward pass whenever the camera viewpoint or lighting changes, and we do not need expensive 3D part information for training, yet the model can generalize to unseen 3D meshes and generate appropriate novel 3D textures. We compare this approach against state-of-the-art texture generation methods and demonstrate that the GGAN obtains significantly better texture generation quality (according to Frechet inception distance). We release our model source code as open source.
description: The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-031-25825-1_28
Improved repeatability measures for evaluating performance of feature detectors
Creators: name: Ehsan, Shoaib
name: Kanwal, Nadia
name: Clark, Adrian F.
name: McDonald-Maier, Klaus D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: The most frequently employed measure for performance characterisation of local feature detectors is repeatability, but it has been observed that this does not necessarily mirror actual performance. Presented are improved repeatability formulations which correlate much better with the true performance of feature detectors. Comparative results for several state-of-the-art feature detectors are presented using these measures; it is found that Hessian-based detectors are generally superior at identifying features when images are subject to various geometric and photometric transformations.
The effect of metallicity on the Cepheid Period-Luminosity relation from a Baade-Wesselink analysis of Cepheids in the Galaxy and in the Small Magellanic Cloud
Creators: name: Carney, B. W.
name: Storm, J.
name: Fry, A. M.
name: Fouqué, P.
name: Latham, D. W.
name: Gieren, W. P.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004

description: (ABRIDGED) We have applied the near-IR Barnes-Evans realization of the Baade-Wesselink method as calibrated by Fouque & Gieren (1997) to five metal-poor Cepheids with periods between 13 and 17 days in the Small Magellanic Cloud as well as to a sample of 34 Galactic Cepheids to determine the effect of metallicity on the period-luminosity (P-L) relation. For ten of the Galactic Cepheids we present new accurate and well sampled radial-velocity curves. The Baade-Wesselink analysis provides accurate individual distances and luminosities to the Cepheids in the two samples, allowing us to constrain directly, in a purely differential way, the metallicity effect on the Cepheid P-L relation. For the Galactic Cepheids we provide a new set of P-L relations which have zero-points in excellent agreement with astrometric and interferometric determinations. These relations can be used directly for the determination of distances to solar-metallicity samples of Cepheids in distant galaxies, circumventing any corrections for metallicity effects on the zero-point and slope of the P-L relation. We find evidence for both such metallicity effects in our data. Comparing our two samples of Cepheids at a mean period of about 15 days, we find a weak effect of metallicity on the luminosity similar to that adopted by the HST Key Project on the Extragalactic Distance Scale.
[Pdf/ePub] The Magic Fish by Trung Le Nguyen download ebook
Creators: name: Strasser
Publisher: name: Zenodo
Year: 2024

description: The Magic Fish by Trung Le Nguyen

 

 

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The Magic Fish

Trung Le Nguyen

Page: 256

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ISBN: 9781984851598

Publisher: Random House Children's Books

 

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Nucleon form factors and parton distributions in nonlocal chiral effective theory
Creators: name: Wang, P.
name: He, Fangcheng
name: Ji, Chueng-Ryong
name: Melnitchouk, W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a review of recent applications of nonlocal chiral effective theory to hadron structure studies. Starting from a nonlocal meson--baryon effective chiral Lagrangian, we show how the introduction of a correlation function representing the finite extent of hadrons regularizes the meson loop integrals and introduces momentum dependence in vertex form factors in a gauge invariant manner. We apply the framework to the calculation of nucleon electromagnetic form factors, unpolarized and polarized parton distributions, as well as transverse momentum dependent distributions and generalized parton distributions. Assuming that the nonlocal behavior is a general property of all interactions, we also discuss the application to the lepton anomalous magnetic moment in nonlocal QED.
description: 97 pages, 32 figures
Whole Earth Telescope observations of the pulsating  hot whitedwarf PG 1707+427
Creators: name: Claver, C. F.
name: Dolez, N.
name: Kepler, S. O.
name: Winget, D. E.
name: Kanaan, A.
name: Fontaine, G.
name: Wesemael, F.
name: Grauer, A. D.
name: Clemens, J. C.
name: O'Brien, M. S.
name: Provencal, J.
name: Vauclair, G.
name: Sansom, A. E.
name: Moskalik, P. A.
name: Kawaler, S. D.
name: Watson, T. K.
name: O'Toole, S.
name: Bradley, P. A.
name: Dixson, J.
name: Bergeron, P.
name: Bedding, T. R.
name: Nather, R. E.
name: Chevreton, M.
name: Vučković, M.
name: Dind, Z. E.
name: Barstow, M. A.
name: Kleinman, S. J.
name: Potter, E. M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004

description: We report on the analysis of multisite time-series photometry of the pulsating pre-white dwarf (GW Vir star) PG 1707+ 427, obtained by the Whole Earth Telescope collaboration. This is the last of the known GW Vir stars without surrounding nebulae to be resolved by multisite data. Successful resolution of the pulsation spectrum resulted from the combination of high signal-to-noise observations with a large telescope and wide coverage in longitude with smaller telescopes. We find a series of 8 pulsation frequencies (along with two nonlinear combination frequencies), and identify 7 of them as part of a sequence of = 1 modes, with a common period spacing of 23.0 s. This spacing implies that the mass of PG 1707+ 427 is 0.57 M○. Preliminary model fits suggest that the mass determined via asteroseismology is consistent with the mass determined from spectroscopy combined with evolutionary tracks.
Supplementary Material from Anthropogenic noise pollution from pile-driving disrupts the structure and dynamics of fish shoals
Creators: name: Herbert-Read, James E.
name: Lousie Kremer
name: Bruintjes, Rick
name: Radford, Andrew N.
name: Ioannou, Christos C.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: Noise produced from a variety of human activities can affect the physiology and behaviour of individual animals, but whether noise disrupts the social behaviour of animals is largely unknown. Animal groups such as flocks of birds or shoals of fish use simple interaction rules to coordinate their movements with near neighbours. In turn, this coordination allows individuals to gain the benefits of group living such as reduced predation risk and social information exchange. Noise could change how individuals interact in groups if noise is perceived as a threat, or if it masked, distracted or stressed individuals, and this could have impacts on the benefits of grouping. Here, we recorded trajectories of individual juvenile seabass (Dicentrarchus labrax) in groups under controlled laboratory conditions. Groups were exposed to playbacks of either ambient background sound recorded in their natural habitat, or playbacks of pile-driving, commonly used in marine construction. The pile-driving playback affected the structure and dynamics of the fish shoals significantly more than the ambient-sound playback. Compared to the ambient-sound playback, groups experiencing the pile-driving playback became less cohesive, less directionally ordered, and were less correlated in speed and directional changes. In effect, the additional-noise treatment disrupted the abilities of individuals to coordinate their movements with one another. Our work highlights the potential for noise pollution from pile-driving to disrupt the collective dynamics of fish shoals, which could have implications for the functional benefits of groups' collective behaviour.
Tree-Grass interactions dynamics and Pulse Fires: mathematical and numerical studies
Creators: name: Tamen, A. Tchuinté
name: Dumont, Y.
name: Bowong, S.
name: Tewa, J. J.
name: Couteron, P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 30A37, 92D40, 37M05

description: Savannas are dynamical systems where grasses and trees can either dominate or coexist. Fires are known to be central in the functioning of the savanna biome though their characteristics are expected to vary along the rainfall gradients as observed in Sub-Saharan Africa. In this paper, we model the tree-grass dynamics using impulsive differential equations that consider fires as discrete events. This framework allows us to carry out a comprehensive qualitative mathematical analysis that revealed more diverse possible outcomes than the analogous continuous model. We investigated local and global properties of the equilibria and show that various states exist for the physiognomy of vegetation. Though several abrupt shifts between vegetation states appeared determined by fire periodicity, we showed that direct shading of grasses by trees is also an influential process embodied in the model by a competition parameter leading to bifurcations. Relying on a suitable nonstandard finite difference scheme, we carried out numerical simulations in reference to three main climatic zones as observable in Central Africa.
description: 51 pages, 7 figures
H I column densities of z > 2 Swift gamma-ray bursts
Creators: name: Reichart, D.
name: Wiersema, K.
name: Priddey, R. S.
name: De Ugarte Postigo, A.
name: Watson, D.
name: Gorosabel, J.
name: Ledoux, C.
name: Jakobsson, P.
name: Björnsson, G.
name: Klose, S.
name: Thöne, C. C.
name: Jensen, B. L.
name: Pedersen, K.
name: Vreeswijk, P.
name: Chapman, R.
name: Fynbo, J. P.U.
name: Tanvir, N. R.
name: Kann, D. A.
name: Sollerman, J.
name: Hjorth, J.
name: Fruchter, A. S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: Before the launch of the
Light nuclei in galactic globular clusters: constraints  on the self-enrichment scenario from nucleosynthesis
Creators: name: Prantzos, N.
name: Charbonnel, C.
name: Iliadis, C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: Aims. Hydrogen-burning is the root cause of the star-to-star abundance variations of light nuclei in Galactic globular clusters (GC). In the present work we constrain the physical conditions that gave rise to the observed abundance patterns of Li, C, N, O, Na, Mg, Al, as well as Mg isotopes in the typical case of NGC 6752. Methods. We perform nucleosynthesis calculations at constant temperature, adopting realistic initial abundances for the proto-cluster gas. We use a detailed nuclear reaction network and state-of-the-art nuclear reaction rates. Results. Although simplistic, our analysis provides original results and new constraints on the self-enrichment scenario for GCs. Our parametric calculations allow us to determine a narrow range of temperature where the observed extreme abundances of all light elements and isotopes in NGC 6752 are nicely reproduced simultaneously. This agreement is obtained after mixing of the H-processed material with ∼30%< of unprocessed gas. We show that the observed C-N, O-Na, Mg-Al, Li-Na and F-Na anticorrelations as well as the behaviour of the Mg isotopes can be recovered by assuming mixing with various dilution factors. Li production by the stars that build up the other abundance anomalies is not mandatory in the case of NGC 6752. Conclusions. Observations of 0. Na, Mg and Al constrain the temperature range for H-burning; such temperatures are encountered in the two main candidate polluters proposed for GCs, namely massive AGBs and the most massive main-sequence stars. Furthermore, observations require dilution of H-burning processed material with pristine one. They provide no clue, however, as to the nature of the unprocessed material required for mixing. The complementary observations of the fragile Li and F clearly point to ISM origin for the mixed material.
Dual unitary circuits in random geometries
Creators: name: Kasim, Yusuf
name: Prosen, Tomaž
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently introduced dual unitary brickwork circuits have been recognised as paradigmatic exactly solvable quantum chaotic many-body systems with tunable degree of ergodicity and mixing. Here we show that regularity of the circuit lattice is not crucial for exact solvability. We consider a circuit where random 2-qubit dual unitary gates sit at intersections of random arrangements of straight lines in two dimensions (mikado) and analytically compute the variance of the spatio-temporal correlation function of local operators. Note that the average correlator vanishes due to local Haar randomness of the gates. The result can be physically motivated for two random mikado settings. The first corresponds to the thermal state of free particles carrying internal qubit degrees of freedom which experience interaction at kinematic crossings, while the second represents rotationally symmetric (random euclidean) space-time.
description: 12 pages, 3 figures
Additional file 3 of Intermittent hypoxia in a mouse model of apnea of prematurity leads to a retardation of cerebellar development and long-term functional deficits
Creators: name: Leroux, S.
name: Rodriguez-Duboc, A.
name: Arabo, A.
name: Basille-Dugay, M.
name: Vaudry, D.
name: Burel, D.
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 3: Table S2. List of primers used for RT-qPCR experiments and their corresponding sequences.
(3080) Ruth Ann Robson
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
[PDF] Deep Utopia: Life and Meaning in a Solved World by Nick Bostrom
Creators: name: Bell
Publisher: name: Zenodo
Year: 2024

description: Deep Utopia: Life and Meaning in a Solved World by Nick Bostrom

 

 

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Deep Utopia: Life and Meaning in a Solved World

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Page: 536

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ISBN: 9781646871643

Publisher: Ideapress Publishing

 

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On the asymptotic giant branch star origin   of peculiar spinel grain OC2
Creators: name: Alexander, C. M.O.D.
name: Lugaro, M.
name: Karakas, A. I.
name: Nittler, L. R.
name: Iliadis, C.
name: Lattanzio, J. C.
name: Hoppe, P.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: Context. Microscopic presolar grains extracted from primitive meteorites have extremely anomalous isotopic compositions revealing the stellar origin of these grains. Multiple elements in single presolar grains can be analysed with sensitive mass spectrometers, providing precise sets of isotopic compositions to be matched by theoretical models of stellar evolution and nucleosynthesis. Aims. The composition of presolar spinel grain OC2 is different from that of all other presolar spinel grains. In particular, large excesses of the heavy Mg isotopes are present and thus an origin from an intermediate-mass (IM) asymptotic giant branch (AGB) star was previously proposed for this grain. We discuss the O, Mg, Al, Cr and Fe isotopic compositions of presolar spinel grain OC2 and compare them to theoretical predictions. Methods. We use detailed models of the evolution and nucleosynthesis of AGB stars of different masses and metallicities to compare to the composition of grain OC2. We analyse the uncertainties related to nuclear reaction rates and also discuss stellar model uncertainties. Results. We show that the isotopic composition of O, Mg and Al in OC2 could be the signature of an AGB star of IM and metallicity close to solar experiencing hot bottom burning, or of an AGB star of low mass (LM) and low metallicity (similar or equal to 0.004) suffering very efficient cool bottom processing. Large measurement uncertainty in the Fe isotopic composition prevents us from discriminating which model better represents the parent star of OC2. However, the Cr isotopic composition of the grain favors an origin in an IM-AGB star of metallicity close to solar. Conclusions. Our IM-AGB models produce a self-consistent solution to match the composition of OC2 within the uncertainties related to reaction rates. Within this solution we predict that the O-16(p, gamma)F-17 and the O-17(p, alpha)N-14 reaction rates should be close to their lower and upper limits, respectively. By finding more g
Additional file 1 of The new normal for food insecurity? A repeated cross-sectional survey over 1 year during the COVID-19 pandemic in Australia
Creators: name: Kent, Katherine
name: Murray, Sandra
name: Penrose, Beth
name: Auckland, Stuart
name: Horton, Ella
name: Lester, Elizabeth
name: Visentin, Denis
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Cancer

description: Additional file 1: Supplementary Table 1. Crude food insecurity prevalence statistics according to all demographic characteristics collected across the three surveys showing the n (%) of each row at the three timepoints (total column); and the n(%) of each row classified as food insecure at each timepoint (food insecure column). Supplementary Table 2. Association between demographic factors and food insecurity—multivariate logistic regression. (AOR = Adjusted Odds Ratio; SE = Standard Error; p = p-value derived from multivariate logistic regression; 95%CI = 95% Confidence Interval).
Primordial non-Gaussianity and non-Gaussian Covariance
Creators: name: Flöss, Thomas
name: Biagetti, Matteo
name: Meerburg, P. Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In the pursuit of primordial non-Gaussianities, we hope to access smaller scales across larger comoving volumes. At low redshift, the search for primordial non-Gaussianities is hindered by gravitational collapse, to which we often associate a scale $k_{\rm NL}$. Beyond these scales, it will be hard to reconstruct the modes sensitive to the primordial distribution. When forecasting future constraints on the amplitude of primordial non-Gaussianity, $f_{\rm NL}$, off-diagonal components are usually neglected in the covariance because these are small compared to the diagonal. We show that the induced non-Gaussian off-diagonal components in the covariance degrade forecast constraints on primordial non-Gaussianity, even when all modes are well within what is usually considered the linear regime. As a testing ground, we examine the effects of these off-diagonal components on the constraining power of the matter bispectrum on $f_{\rm NL}$ as a function of $k_{\rm max}$ and redshift, confirming our results against N-body simulations out to redshift $z=10$. We then consider these effects on the hydrogen bispectrum as observed from a PUMA-like 21-cm intensity mapping survey at redshifts $2
description: 6+6 pages, 4 figures, code available at https://github.com/tsfloss/pyNG