cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evolutionary Histories of Dwarf Galaxies in the Local Group
Creators: name: Grebel, Eva K.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The star formation histories of Local Group (LG) dwarf galaxies and more distant potential LG members are reviewed. Problems in defining the spatial extent of the LG and membership are briefly discussed. The morphological types found in the LG are presented, and it is suggested that we see continuous evolution from low-mass dwarf irregulars (dIrrs) to dwarf spheroidal galaxies (dSph) in the LG. Star formation histories for LG dwarfs and nearby LG candidates are compiled using population boxes. No two dwarfs, irrespective of morphological type, show the same evolutionary history, and all vary widely in ages of their subpopulations and in their enrichment history. The lack of gas in dSphs and dEs may be explained by a new photoionization scenario. Old populations, often spatially very extended, may be a common property of dwarf galaxies, though their fractions can be very small. Almost all types of dwarf galaxies studied in detail so far show spatial variations in ages and abundances such as radial age/metallicity gradients. The observed star formation histories impose constraints on merger and accretion scenarios. Properties of the Milky Way dSphs are compared to the M31 dSphs and discussed in the framework of the ram pressure/tidal stripping scenario. It is demonstrated that the newly discovered LG dwarfs follow the same relationship for central surface brightness, mean metallicity, and absolute magnitude as the other LG dwarfs. (Shortened)
description: Invited review to appear in "The Stellar Content of the Local Group", IAU Symp. 192, Cape Town, Sep. 1998, eds. P. Whitelock & R. Cannon, ASP Conf. Ser., in press. 21 pages, 9 color figures, uses ASP Conf. style
Additional file 1: of Patient preference survey: are patients willing to delay surgery if obstructive sleep apnea is suspected?
Creators: name: Ho, George
name: Crispiana Cozowicz
name: Wong, Jean
name: Singh, Mandeep
name: Lam, Enoch
name: Mรถrwald, Eva
name: Hasan, Najia
name: Memtsoudis, Stavros
name: Chung, Frances
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Survey on Participant Preference. (DOCX 28 kb)
Quantum Correlators in Friedmann Spacetimes -The omnipresent de Sitter and the invariant vacuum noise
Creators: name: Lochan, Kinjalk
name: Rajeev, Karthik
name: Vikram, Amit
name: Padmanabhan, T.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss several aspects of quantum field theory of a scalar field in a Friedmann universe, clarifying and highlighting several conceptual and technical issues. (A) We show that one can map the dynamics of (1) a massless scalar field in a universe with power law expansion to (2) a massive scalar field in the de Sitter spacetime, which allows us to understand several features of either system and clarifies several issues related to the massless limit. (B) We obtain a useful integral representation for the Euclidean Green's function for the de Sitter spacetime, by relating it to the solution of a hypothetical electrostatic problem in five dimensions. This is helpful in the study of several relevant limits. (C) We recover that in any Friedmann universe, sourced by a negative pressure fluid, the Wightman function for a massless scalar field is divergent. This shows that the divergence of Wightman function for the massless field in the de Sitter spacetime is just a special, limiting, case of this general phenomenon. (D) We provide a generally covariant procedure for defining the power spectrum of vacuum fluctuations in terms of the different Killing vectors present in the spacetime. This allows one to study the interplay of the choice of vacuum state and the nature of the power spectrum in different coordinate systems, in the de Sitter universe, in a unified manner. (Truncated Abstract; see the paper for full Abstract.)
description: Published version
Systematic search for singularities in 3D Euler flows
Creators: name: Zhao, Xinyu
name: Protas, Bartosz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the question whether starting from a smooth initial condition 3D inviscid Euler flows on a periodic domain $\mathbb{T}^3$ may develop singularities in a finite time. Our point of departure is the well-known result by Kato (1972), which asserts the local existence of classical solutions to the Euler system in the Sobolev space $H^m(\mathbb{T}^3)$ for $m > 5/2$. Thus, potential formation of a singularity must be accompanied by an unbounded growth of the $H^m$ norm of the velocity field as the singularity time is approached. We perform a systematic search for "extreme" Euler flows that may realize such a scenario by formulating and solving a PDE-constrained optimization problem where the $H^3$ norm of the solution at a certain fixed time $T > 0$ is maximized with respect to the initial data subject to suitable normalization constraints. This problem is solved using a state-of-the-art Riemannian conjugate gradient method where the gradient is obtained from solutions of an adjoint system. Computations performed with increasing numerical resolutions demonstrate that, as asserted by the theorem of Kato (1972), when the optimization time window $[0, T]$ is sufficiently short, the $H^3$ norm remains bounded in the extreme flows found by solving the optimization problem, which indicates that the Euler system is well-posed on this "short" time interval. On the other hand, when the window $[0, T]$ is long, possibly longer than the time of the local existence asserted by Kato's theorem, then the $H^3$ norm of the extreme flows diverges upon resolution refinement, which indicates a possible singularity formulation on this "long" time interval. The extreme flow obtained on the long time window has the form of two colliding vortex rings and is characterized by certain symmetries. In particular, the region of the flow in which a singularity might occur is nearly axisymmetric.
description: 35 pages, 16 figures
Application of cosmic microwave background techniques to a gravitational wave stochastic background
Creators: name: Conneely, Ciarán
Publisher: name: Imperial College London
Year: 2018

description: The detection of gravitational waves by the LIGO and Virgo collaborations has allowed us to view the universe in new way and given us direct measurements of black holes for the first time. In coming years we will be able to measure not only individual burst sources but also the stochastic background of gravitational waves permeating the universe. This will be a treasure trove of information about the universe, from which we will be able to learn about a vast range of areas including astrophysics (such as that of compact binaries), cosmology of cosmic strings and inflation and even the nuclear physics involved in neutron stars. This is particularly exciting because of what we have already been able to measure from the observations we have, such as putting constraints on the Hubble constant. It will, however, lead to new challenges, in particular how best to analyse the background. The purpose of this thesis is to use analogies to the cosmic microwave background angular power spectra in order to generate and compare two different formalisms for this analysis — one based upon the amplitude signals and one on the gravitational wave Stokes parameter. I will show their respective strengths and weaknesses in analysing the forthcoming data and, specifically, we will see that the Stokes parameters calculations are able convey information about anisotropic and correlated signals that the amplitudes cannot. I will also consider how well we will be able to measure a given background by studying the sensitivity of different detectors to these different formalisms, showing that a detector in motion has many advantages over one that is effectively stationary. Finally, I apply these techniques to showing that we can use multiple independent measurements to recover the angular power spectra for a given background.
Cosmological Redshift. An Information Mechanics Perspective
Creators: name: Kantor, Frederick W.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A photon's observed wavelength tells an astronomical detector about the amount of position information obtained by observing that photon. This amount of position information may depend on time in a way which, to first order over distances small compared to the size of the universe, might account for the cosmological redshift.
description: 4 pages; LaTeX2e; in press, International Journal of Theoretical Physics
Optimal Mechanism for Randomized Responses under Universally Composable Security Measure
Creators: name: Yoshida, Yuuya
name: Yung, Man-Hong
name: Hayashi, Masahito
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We consider a problem of analyzing a global property of private data through randomized responses subject to a certain rule, where private data are used for another cryptographic protocol, e.g., authentication. For this problem, the security of private data was evaluated by a universally composable security measure, which can be regarded as $(0,δ)$-differential privacy. Here we focus on the trade-off between the global accuracy and a universally composable security measure, and derive an optimal solution to the trade-off problem. More precisely, we adopt the Fisher information of a certain distribution family as the estimation accuracy of a global property and impose $(0,δ)$-differential privacy on a randomization mechanism protecting private data. Finally, we maximize the Fisher information under the $(0,δ)$-differential privacy constraint and obtain an optimal mechanism explicitly.
description: 12 pages, 6 figures; changed the title and revised the abstract, introduction, and section 6
Neutrino-pair bremsstrahlung by electrons in neutron star crusts
Creators: name: Kaminker, A. D.
name: Pethick, C. J.
name: Potekhin, A. Y.
name: Thorsson, V.
name: Yakovlev, D. G.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Neutrino-pair bremsstrahlung by relativistic degenerate electrons in a neutron-star crust at densities (10^9 - 1.5x10^{14}) g/cm^3 is analyzed. The processes taken into account are neutrino emission due to Coulomb scattering of electrons by atomic nuclei in a Coulomb liquid, and electron-phonon scattering and Bragg diffraction (the static-lattice contribution) in a Coulomb crystal. The static-lattice contribution is calculated including the electron band-structure effects for cubic Coulomb crystals of different types and also for the liquid crystal phases composed of rod- and plate-like nuclei in the neutron-star mantle (at 10^{14} - 1.5x10^{14} g/cm^3). The phonon contribution is evaluated with proper treatment of the multi-phonon processes which removes a jump in the neutrino bremsstrahlung emissivity at the melting point obtained in previous works. Below 10^{13} g/cm^3, the results are rather insensitive to the nuclear form factor, but results for the solid state near the melting point are affected significantly by the Debye-Waller factor and multi-phonon processes. At higher densities, the nuclear form factor becomes more significant. A comparison of the various neutrino generation mechanisms in neutron star crusts shows that electron bremsstrahlung is among the most important ones.
description: 17 pages, 13 figures, LaTeX using aa.cls and epsf.sty. A&A, in press
Multicolor Polarimetry of Selected Be Stars: 1995-98
Creators: name: McDavid, David
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A new polarimeter called AnyPol has been used at Limber Observatory for four years to annually monitor the broadband linear polarization of a sample of bright northern Be stars. This is the fourth report on a program started in 1985 at McDonald Observatory and the first one to come entirely from the new installation. Although no variability was detected at the 3-sigma level during the current reporting period, analysis of the full 13-year data set is beginning to reveal hints of long-term variability that may provide clues for understanding the Be phenomenon.
description: 25 pages including 17 tables; 17 figures; aaspp4 style; accepted by PASP
Time-System Entanglement and Special Relativity
Creators: name: Loc, Ngo Phuc Duc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We know that space and time are treated almost equally in classical physics, but we also know that this is not the case for quantum mechanics. A quantum description of both space and time is important to really understand the quantum nature of reality. The Page-Wootters mechanism of quantum time is a promising starting point, according to which the evolution of the quantum system is described by the entanglement between it and quantum temporal degrees of freedom. In this paper, we consider a qubit clock that is entangled with a quantum system due to the Wigner rotation induced by Lorentz transformation. We study how this time-system entanglement depends on the rapidity of the Lorentz boost. We consider the case of a spin-1/2 particle with Gaussian momentum distribution as a concrete example. We also compare the time-system entanglement entropy with the spin-momentum entanglement entropy and find that the former is smaller than the latter.
description: 7 pages + 7 figures; published version
X-rays and soft gamma-rays from Seyferts, radio galaxies, and black-hole binaries
Creators: name: Zdziarski, Andrzej A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Selected topics dealing with X-ray/soft gamma-ray emission from accreting black-hole sources are reviewed. The shape of soft gamma-ray spectra of Seyferts observed by OSSE can be well modelled by thermal Comptonization. A very strong correlation between the X-ray slope and the strength of Compton reflection in these sources can then be explained by thermal Comptonization in vicinity of the reflecting cold media. Similar correlation is seen for the hard state of black-hole binaries, but the strength of Compton reflection at a given X-ray slope is larger than in Seyferts. This appears to be due to seed photons (for Comptonization) emitted by the cold media having larger energies in stellar-mass systems than in Seyferts. Broad-line radio galaxies have hard X-ray spectra with weak reflection, which reflection is similar to that in Seyferts with hard X-ray spectra. Two main models for the source geometry, a hot inner disk surrounded by a cold outer disk, and a dynamic corona above a cold disk, appear about equally viable based on the presently available data.
description: Invited review in: High Energy Processes in Accreting Black Holes, eds. Poutanen J., Svensson R., ASP Conf. Series 161, pp. 16-35 (1999)
Loxia malabarica Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia malabarica

description: Loxia malabarica [spec. nov.]
L. cinerea, remigibus rectricibusque nigris, gula anoque albis.
Habitat in Indiis.
Corpus magnitudine & facie Pari. Rostrum nigrum. Gula alba. Remiges & Rectrices nigrae. Ani regio albida.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 175, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Dissipative motion in galaxies with non-axisymmetric potentials
Creators: name: El-Zant, Amr
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Due to the clumpy nature of the self gravitating gas composing the interstellar medium, it is not clear whether galactic gas dynamics can be discussed in terms of standard hydrodynamics. Nevertheless, it is clear that certain generic properties related to orbital structure in a given potential and the effect of dissipation can be used to qualitatively understand gas motion in galaxies. The effect of dissipation is examined in triaxial galaxy potentials with and without rotating time dependent components. In the former case, dissipative trajectories settle around closed loop orbits when these exist. When they do not, e.g., inside a constant density core, then the only attractor is the centre and this leads to mass inflow. This provides a self regulating mechanism for accession of material towards the centre --- since the formation of a central masses destroys the central density core and eventually stops the accession. In the case when a rotating bar is present, there are usually several types of attractors, including those on which long lived chaotic motion can occur (strange attractors). Motion on these is erratic with large radial and vertical oscillations.
description: Contibution to the conference on ``Astrophysical Fluids: From Atomic Nuclei to Stars and Galaxies'' (in honour of Giora Shaviv's 60 th birthday). To appear in Physics Reports
Large-scale predictions on turbulent gas-solid flows
Creators: name: Curran, Thomas Liam Steven
Publisher: name: Imperial College London
Year: 2019

description: The interaction of solid particles with turbulence has for long been a topic of interest for predicting the behaviour of industrially relevant flows. The flow interacts with the solid particles, the particles in turn modify the turbulent flow field, and particles collide with one another. The multi-level of interactions between the two-phases challenges our physical comprehension of these dynamical systems, as well as the numerical modelling strategies. Large-scale predictions on two-phase flows encompass the numerical solving of the largest turbulent structures and the tracking of large numbers of individual particles. Large Eddy Simulation methods are widely used for their low computational cost and accuracy in resolving most of the turbulent scales. In one-way coupled simulations however, the smallest scales can be relevant when considering second order dispersions of solid particles. A subgrid scale model is presented which enforces a correlation of the subgrid scale velocity of neighbouring particles, hence ensuring particle-pair dispersion statistics. Depending on their size and inertia, particles tend to accumulate in preferential regions forming clusters. A new numerical investigation on the turbulence modulation due to these large scale clusters is presented. A novel method for computing a characteristic length scale of clusters is introduced. Two-way coupled Direct Numerical Simulations of homogeneous isotropic turbulence are performed for a large range of particle Stokes number and mass loadings. A correlation is found between one the turbulent modulation length scales and the characteristic length scale of clusters. The Lagrangian framework is appreciated for its accuracy in tracking particle trajectories. However, in case of four-way coupling approach, the deterministic detection of colliding particle pairs becomes computationally very expensive. A new correlated stochastic model for particle collisions in the Lagrangian framework is introduced. The model is first validated for a homogeneous isotropic turbulence case, and then in a vertical channel flow.
Loxia cana Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia cana

description: Loxia cana [spec. nov.]
L. cana, remigibus rectricibusque fuscis, pedibus rubris.
Linaria cinerea orientalis. Edw. av. 179. t. 179. f. 1.
Habitat in Asia.
Margines rectricum & oris regio albida.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 175, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Additional file 1: of GNPTAB c.2404Câ >â T nonsense mutation in a patient with mucolipidosis III alpha/beta: a case report
Creators: name: Chi-Chun Ho
name: Tsung, Lilian
name: Kam-Tim Liu
name: Wing-Tat Poon
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: Hematology

description: Primers used for PCR and sequencing of GNPTAB gene. Eighteen pairs primers were designed with the help of in-house software AutoPrimer 1.0 ( https://github.com/autoprimer/1.0 or https://github.com/hkhcc/seq_processing for the latest developmental version). The primer sequences and the corresponding GNPTAB exons corresponding to the transcript NM_024312.4 are listed. (DOCX 21 kb)
Nonlinear density evolution from an improved spherical collapse model
Creators: name: Engineer, S.
name: Kanekar, Nissim
name: Padmanabhan, T.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the evolution of non-linear density perturbations by taking into account the effects of deviations from spherical symmetry of a system. Starting from the standard spherical top hat model in which these effects are ignored, we introduce a physically motivated closure condition which specifies the dependence of the additional terms on the density contrast, $δ$. The modified equation can be used to model the behaviour of an overdense region over a sufficiently large range of $δ$. The key new idea is a Taylor series expansion in ($1/δ$) to model the non-linear epoch. We show that the modified equations quite generically lead to the formation of stable structures in which the gravitational collapse is halted at around the virial radius. The analysis also allows us to connect up the behaviour of individual overdense regions with the non-linear scaling relations satisfied by the two point correlation function.
description: 11 pages, 6 figures. Final version, contains added discussion and modified figures to match the accepted version
Loxia caerulea Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia caerulea

description: Loxia caerulea [spec. nov.]
L. caerulea, alis fuscis fascia baseos purpurea.
Coccothraustes caerulea. Catesb. car. 1. p. 39. t. 39.
Habitat in America.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 175, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Computational modelling of airflow and transport in the upper respiratory tract
Creators: name: Xiao, Qiwei
Publisher: name: Imperial College London
Year: 2019

description: This thesis comprises an investigation of the dynamics of airflow in the upper respiratory tract from the nose to the carina using computational modelling. The work primarily considers inspiratory flow and comprises separate detailed studies of airflow in three distinct regions: the nose, the larynx and the trachea. In the nose, both airflow dynamics and the associated processes of heat and water exchange are studied. The geometry of the nasal cavity is highly variable both inter- and intra-subjectively. The consequences of inter- and intra-subject variability for both airflow and exchange processes during inspiration is investigated using 10 subject geometries obtained by MRI scans in the decongested and congested states. Non-dimensional scalings are applied to quantify the effects of flowrate and geometry on wall shear stress, heat and water transport. It is found that the anterior nasal cavity contributes most to the exchange process and that decongestion generally affects the distribution of inspiratory flow, promoting a switch towards more inferior pathways. Flow in the larynx is controlled by the position of the vocal folds, which determine the glottis aperture. Even with the vocal folds fully abducted, inspiratory airflow experiences a degree of constriction and exits the glottis as a jet which dissipates in the trachea. The effect of glottis aperture on pressure loss and flow structure is examined, and the results compared with those from a separate experimental investigation. In pathological tracheal geometries, characterized by severe constriction and deviation as caused by compressive retrosternal goitre, far more severe pressure losses may occur than in the normal trachea. The third investigation performed in this work describes a computational approach to assess pathological tracheal resistance. Direct and large eddy simulation results are applied to determine the profile of energy dissipation in the case of a progressive tracheal compression. The study examines the effects of inflow disturbances on the breakup of the jet downstream of the constriction and the consequent loss characteristics. The effect of domain truncation, associated with the typical field of view of clinical imaging, is an important consideration and is investigated.
Vibrational enhancement of quadrature squeezing and phase sensitivity in resonance fluorescence
Creators: name: Iles-Smith, Jake
name: Nazir, Ahsan
name: McCutcheon, Dara P. S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Vibrational environments are commonly considered to be detrimental to the optical emission properties of solid-state and molecular systems, limiting their performance within quantum information protocols. Given that such environments arise naturally it is important to ask whether they can instead be turned to our advantage. Here we show that vibrational interactions can be harnessed within resonance fluorescence to generate optical states with a higher degree of quadrature squeezing than in isolated atomic systems. Considering the example of a driven quantum dot coupled to phonons, we demonstrate that it is feasible to surpass the maximum level of squeezing theoretically obtainable in an isolated atomic system and indeed come close to saturating the fundamental upper bound on squeezing from a two-level emitter. We analyse the performance of these vibrationally-enhanced squeezed states in a phase estimation protocol, finding that for the same photon flux, they can outperform the single mode squeezed vacuum state.
description: 14 pages (including supplementary information), 6 figures. V2 - substantial new calculation on the performance of vibrationally enhanced squeezed states in a phase estimation protocol. Text and title updated accordingly, along with various other edits to clarify the manuscript. V3 - close to published version
title: ADCO, Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402) (11 H 1160), f. 00343
Creators: name: de la Côte-d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2017
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: comptes
subject: LaMOP

description: Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402), Archives départementales de la Côte-d'Or, (11 H 1160). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402), Archives départementales de la Côte-d'Or, (11 H 1160), f. 00343, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: abbaye de Cîteaux
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
On the Azimuthal Stability of Shock Waves around Black Holes
Creators: name: Molteni, Diego
name: Toth, Gabor
name: Kuznetsov, Oleg A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Analytical studies and numerical simulations of time dependent axially symmetric flows onto black holes have shown that it is possible to produce stationary shock waves with a stable position both for ideal inviscid and for moderately viscous accretion disks. We perform several two dimensional numerical simulations of accretion flows in the equatorial plane to study shock stability against non-axisymmetric azimuthal perturbations. We find a peculiar new result. A very small perturbation seems to produce an instability as it crosses the shock, but after some small oscillations, the shock wave suddenly transforms into an asymmetric closed pattern, and it stabilizes with a finite radial extent, despite the inflow and outflow boundary conditions are perfectly symmetric. The main characteristics of the final flow are: 1) The deformed shock rotates steadily without any damping. It is a permanent feature and the thermal energy content and the emitted energy vary periodically with time. 2) This behavior is also stable against further perturbations. 3) The average shock is still very strong and well defined, and its average radial distance is somewhat larger than that of the original axially symmetric circular shock. 4) Shocks obtained with larger angular momentum exhibit more frequencies and beating phenomena. 5) The oscillations occur in a wide range of parameters, so this new effect may have relevant observational consequences, like (quasi) periodic oscillations, for the accretion of matter onto black holes. Typical time scales for the periods are 0.01 and 1000 seconds for black holes with 10 and 1 million solar mass, respectively.
description: 15 pages, 7 figures, accepted by the Astrophysical Journal
Additional file 5: of The alternative sigma factor RpoQ regulates colony morphology, biofilm formation and motility in the fish pathogen Aliivibrio salmonicida
Creators: name: Khider, Miriam
name: Willassen, Nils
name: Hansen, Hilde
Publisher: name: figshare
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Figure S4. The figure shows the slimy extracellular matrix formed by Î rpoQ in the biofilm assay. (DOCX 701 kb)
Loxia melanocephala Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia melanocephala

description: Loxia melanocephala [spec. nov.]
L. lutea, capite atro.
Coccothraustes gambogia. Alb. av. 3. p. 58. t. 62.
Habitat in Gvinea.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 175, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Instability of a Kerr-type naked singularity due to light and matter accretion and its shadow
Creators: name: Tavlayan, Aydin
name: Tekin, Bayram
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study null and timelike constant radii geodesics in the environment of an over-spinning putative Kerr-type naked singularity. We are particularly interested in two topics: first, the differences of the shadows of the naked rotating singularity and the Kerr black hole; and second, the spinning down effect of the particles falling from the accretion disk. Around the naked singularity, the non-equatorial prograde orbits in the Kerr black hole remain intact up to a critical rotation parameter ($α=\sqrt{6 \sqrt{3}-9}$) and cease to exist above this value [Eur. Phys. J. C 78, 879 (2018)]. This has an important consequence in the shadow of the naked singularity if the shadow is registered by an observer on the polar plane or close to it as the shadow cannot be distinguished from that of a Kerr black hole viewed from the same angle considering only the light emanating from the unstable photon orbits. We show that the timelike retrograde orbits in the equatorial plane immediately (after about an 8% increase in mass for the case of initial $α=1.5$) reduce the spin parameter of the naked singularity from larger values to $α=1$ at which an event horizon appears. This happens because the retrograde orbits have a larger capture cross-section than the prograde ones. So if a naked singularity happens to have an accretion disk, it will not remain naked for long, an event horizon forms.
description: 26 pages, discussions extended, matches the published version
Streaming velocities as a dynamical estimator of Omega
Creators: name: Ferreira, P. G.
name: Juszkiewicz, R.
name: Feldman, H. A.
name: Davis, M.
name: Jaffe, A. H.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is well known that estimating the pairwise velocity of galaxies, v_{12}, from the redshift space galaxy correlation function is difficult because this method is highly sensitive to the assumed model of the pairwise velocity dispersion. Here we propose an alternative method to estimate v_{12} directly from peculiar velocity samples, which contain redshift-independent distances as well as galaxy redshifts. In contrast to other dynamical measures which determine beta = sigma_8 x Omega^{0.6}, our method can provide an estimate of (sigma_8)^2 x Omega^{0.6} for a range of sigma_8 (here Omega is the cosmological mass density parameter while sigma_8 is the standard normalization parameter for the spectrum of matter density fluctuations). We demonstrate how to measure this quantity from realistic catalogues.
description: 8 pages of text, 4 figures Subject headings: Cosmology: theory - observation - peculiar velocities: large scale flows Last name of one of the authors was misspelled. It is now corrected. Otherwise the manuscript is identical to its original version
Homotopy theory of algebraic quantum field theories
Creators: name: Benini, Marco
name: Schenkel, Alexander
name: Woike, Lukas
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Topology (math.AT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81Txx, 18D50, 18G55, 55U35

description: Motivated by gauge theory, we develop a general framework for chain complex valued algebraic quantum field theories. Building upon our recent operadic approach to this subject, we show that the category of such theories carries a canonical model structure and explain the important conceptual and also practical consequences of this result. As a concrete application we provide a derived version of Fredenhagen's universal algebra construction, which is relevant e.g. for the BRST/BV formalism. We further develop a homotopy theoretical generalization of algebraic quantum field theory with a particular focus on the homotopy-coherent Einstein causality axiom. We provide examples of such homotopy-coherent theories via (1) smooth normalized cochain algebras on $\infty$-stacks, and (2) fiber-wise groupoid cohomology of a category fibered in groupoids with coefficients in a strict quantum field theory.
description: v2: 38 pages - Added appendix on examples for local-to-global constructions. Final version published in Letters in Mathematical Physics
A Relativistic Particle Outburst From The Soft Gamma-Ray Repeater SGR1900+14
Creators: name: Frail, D. A.
name: Kulkarni, S. R.
name: Bloom, J. S.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Soft gamma-ray repeaters (SGR) are a class of high energy transients whose brief emissions are thought to arise from young and highly magnetized neutron stars. The exact cause for these outbursts and the nature of the energy loss remain unknown. Here we report the discovery of a fading radio source within the localization of the relatively under-studied SGR 1900+14. We argue that this radio source is a short-lived nebula powered by the particles ejected during the intense high energy activity in late August 1998, which included the spectacular gamma-ray burst of August 27. The radio observations allow us to constrain the energy released in the form of particles ejected during the burst, un-complicated by beaming effects. Furthermore, thanks to the astrometric precision of radio observations, we have finally localized this repeater to sub-arcsecond accuracy.
description: Nature, accepted, December 1998. For further enquiries please contact Dale Frail (dfrail@nrao.edu) or Shri Kulkarni (srk@astro.caltech.edu)
The role of reversibility in quantum thermodynamics and the foundations of quantum theory
Creators: name: Richens, Jonathan
Publisher: name: Imperial College London
Year: 2018

description: The first half of this thesis is dedicated to the study of generalizations of probability theory which include quantum theory and many of its alternatives. This research program seeks to understand quantum theory by exploring it ‘from the outside’, where it sits within a landscape of all operationally defined theories. We approach this problem with a new perspective: generalized decoherence. Quantum theory recovers classical theory via decoherence, where a ‘classical limit’ is achieved by a quantum system interacting with its environment, losing its quantum coherence. Typically it is the emergence of the classical world from the quantum that is studied. We reverse this paradigm and ask - how does the existence of a classical limit define the structure of quantum theory, or any other post-classical theory? We derive the existence of entangled states as a necessary feature of any theory that allows for the emergence of the classical world in this way. We then use our framework for generalized decoherence to explore the properties of theories that can ‘hyperdecohere’ to quantum theory. We find that any such theory must be very exotic compared to quantum theory, violating either the postulate of tomographic locality, reversibility, causality or purity. In the second half of this thesis we turn our attention to the second law of thermodynamics. We present a framework for deriving the second law under general constraints and explore two pertinent examples, constraining the fluctuations in work and constraining the size of the thermal bath and deriving the second law in these cases. Bounding fluctuations results in a unified free energy that contains the single-shot and Helmholtz free energies as limiting cases. Bounding the size of the thermal bath results in a finite-bath second law that is more general that previous attempts and draws connections between non-asymptotic thermodynamics and second-order information theory.
Additional file 1: of Trauma and perceived social rejection among Yazidi women and girls who survived enslavement and genocide
Creators: name: Hawkar Ibrahim
name: Ertl, Verena
name: Catani, Claudia
name: Ismail, Azad
name: Neuner, Frank
Publisher: name: figshare
Year: 2018
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Table S1. Skewness and kurtosis for dependent and independent variables. Table S2. Intercorrelation between PTSD, depression, and traumatic events with demographic variables. (DOCX 25 kb)
Respecting Boundaries: Theoretical Equivalence and Structure Beyond Dynamics
Creators: name: Wolf, William J.
name: Read, James
Publisher: name: arXiv
Year: 2023
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: A standard line in the contemporary philosophical literature has it that physical theories are equivalent only when they agree on their empirical content, where this empirical content is often understood as being encoded in the equations of motion of those theories. In this article, we question whether it is indeed the case that the empirical content of a theory is exhausted by its equations of motion, showing that (for example) considerations of boundary conditions play a key role in the empirical equivalence (or otherwise) of theories. Having argued for this, we show that philosophical claims made by Knox (2011) that general relativity is equivalent to teleparallel gravity, and by Weatherall (2016) that electromagnetism in the Faraday tensor formalism is equivalent to electromagnetism in the vector potential formalism, can both be called into question. We then show that properly considering the role of boundary conditions in theory structure can potentially restore these claims of equivalence and close with some remarks on the pragmatics of adjudications on theory identity.
description: Updated to match published version
On equiangular lines in 17 dimensions and the characteristic polynomial of a Seidel matrix
Creators: name: Greaves, Gary R. W.
name: Yatsyna, Pavlo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: For $e$ a positive integer, we find restrictions modulo $2^e$ on the coefficients of the characteristic polynomial $χ_S(x)$ of a Seidel matrix $S$. We show that, for a Seidel matrix of order $n$ even (resp. odd), there are at most $2^{\binom{e-2}{2}}$ (resp. $2^{\binom{e-2}{2}+1}$) possibilities for the congruence class of $χ_S(x)$ modulo $2^e\mathbb Z[x]$. As an application of these results, we obtain an improvement to the upper bound for the number of equiangular lines in $\mathbb R^{17}$, that is, we reduce the known upper bound from $50$ to $49$.
description: 21 pages, fixed typo in Lemma 2.1
Pulmonary exacerbations of cystic fibrosis: development and validation of the oral antibiotics indicator score
Creators: name: Orchard, Christopher
Publisher: name: Imperial College London
Year: 2018

description: Introduction: Cystic fibrosis pulmonary disease is characterised by recurrent exacerbations. These are more than temporary declines in lung function and have longer term effects on quality of life and survival. Traditional treatment has involved prolonged courses of IV antibiotics. Oral antibiotics are effective for treating pulmonary exacerbations in some patients, however, thus far it has been difficult to identify this group. This thesis aimed to develop and validate a score to identify patients in any care setting in whom pulmonary exacerbations could be treated effectively with oral antibiotics. Methods – Derivation: A retrospective database of oral and IV antibiotic use in a cohort of 254 CF patients for treatment of pulmonary exacerbations over 1 year of follow up was used. Effectiveness of oral and IV antibiotic treatment and time to next exacerbation (TTNE) were analysed to develop a scoring system (Oral AntibioticS Indicator Score, OASIS) for use in stratifying patients into different treatment groups. Validation: The OASIS score was tested prospectively in a new cohort of 59 patients, who were recruited at the start of a new pulmonary exacerbation and outcome of treatment with oral and IV antibiotics was examined at day 14. Results: - Derivation cohort - there was no significant difference in outcomes between oral and IV antibiotics. From this the OASIS, a simple 3-point scoring system was developed including previous recent use of intravenous antibiotics, new respiratory symptoms and CXR Northern score. Validation cohort - There was no significant difference in successful treatment outcome between oral (57% success) and IV (77%) antibiotics (p=0.198). The OASIS score could not identify patients in whom oral antibiotics would be successful (p=0.348), but elevated day 14 CRP was associated with treatment failure (p=0.001) and increased exacerbation rate in the 4 subsequent 6 months. Factors associated with treatment failure in the oral antibiotic group when reanalysed included baseline and day 1 of exacerbation FEV1 %predicted and number of pulmonary exacerbations in the preceding 12 months. Conclusion: The OASIS score could not accurately predict outcome for patients treated with oral antibiotics, but upon reanalysis factors associated with treatment failure of oral antibiotics were identified. A new approach, with more sophisticated biomarkers validated in larger studies is required to enable better targeting of oral antibiotic therapy to treat CF pulmonary exacerbations.