cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On Type IIA AdS$_3$ solutions and massive GK geometries
Creators: name: Couzens, Christopher
name: Macpherson, Niall T.
name: Passias, Achilleas
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give the necessary and sufficient conditions for warped AdS$_3$ (and Mink$_3$) solutions of Type II supergravities to preserve ${\cal N}=(2,0)$ supersymmetry, in terms of geometric conditions on their internal space M$_7$. Such solutions possess a canonical ten-dimensional Killing vector that can be either time-like or null. In this work we classify the null case in massive Type IIA supergravity which necessitates that M$_7$ decomposes as a circle fibration over a six-dimensional base with orthogonal SU(2)-structure containing a complex four-manifold. We narrow our focus to solutions for which M$_7$ becomes $\mathbb{T}^2$ fibred over a foliation of a Kähler manifold over an interval. We find a class of solutions which are the massive Type IIA version of GK geometries and present an extremal problem which computes the central charge of the solution using just topology. Finally, we present geometric conditions for AdS$_3$ solutions to preserve arbitrary extended chiral supersymmetry.
Development of Safe and Effective Magnetic Resonance Contrast Agents for Blood Pool Imaging and Cancer Diagnosis
Creators: name: Ye, Zhen
Publisher: name: University of Utah
Year: 2019

description: The current commercialized Gd(III)-based magnetic resonance (MR) contrast agents are small molecules characterized with short blood half-life and nonspecific tissue distribution. The accuracy of MR diagnosis involving clinical contrast agents is often hindered because of a short diagnostic window and low selectivity of target tissues. Macromolecular Gd(III)-based contrast agents are more effective than small molecular agents for blood pool imaging with high relaxivity and limited vascular extravasation. However, the clinical translation of macromolecular contrast agents is impeded by the potential safety concerns associated with their slow excretion and prolonged tissue retention. Polydisulfide Gd(III) complexes have been developed as biodegradable macromolecular MR contrast agents to facilitate the excretion of Gd(III) chelates and alleviate the safety concerns. The agents can be readily degraded and excreted via renal filtration with minimal tissue retention. However, the reported polydisulfide Gd(III) complexes are based on linear Gd(III) chelates of a DTPA derivative, which has poor kinetic stability. In this research, two alternative polydisulfides have been developed to minimize the stability issue of the linear Gd(III) ligand. Firstly, polydisulfide Mn(II) complexes were developed as gadolinium-free biodegradable macromolecular MRI contrast agents. Two polydisulfide Mn(II) complexes based on Mn-DTPA and Mn- EDTA were synthesized and characterized. Both agents showed comparable relaxivity to the reported polydisulfide Gd(III) complexes. The degradations of both polydisulfide iv Mn(II) complexes were demonstrated through in vitro incubation with endogenous free thiols. In vitro transmetallation study revealed higher kinetic inertness of the Mn-DTPAbased agent. In vivo MR evaluation showed preferential contrast enhancement of Mn(II) agents in the liver and myocardium. Secondly, polydisulfides based on the more stable macrocyclic Gd(III) chelates were developed and evaluated. Two polydisulfide Gd- DOTA conjugates with charge differences were synthesized and characterized. Both agents showed improved relaxivity, and efficient degradability. Both in vitro and in vivo transmetallation study revealed higher kinetic inertness of the macrocyclic polydisulfide agents than the previously reported linear agents. The effect of charge on pharmacokinetics and biodistribution was compared and discussed.
Neutrosophic Sets and Systems, vol. 11/2016
Creators: name: Smarandache, Florentin
name: Ali, Mumtaz
Publisher: name: figshare
Year: 2018
Subjects: Algebra

description: “Neutrosophic Sets and Systems” has been created for publications on advanced studies in neutrosophy, neutrosophic set, neutrosophic logic, neutrosophic probability, neutrosophic statistics that started in 1995 and their applications in any field, such as the neutrosophic structures developed in algebra, geometry, topology, etc
On the Existence of Undistorted Progressive Waves (UPWs) of Arbitrary Speeds $0 \leq v< \infty$ in Nature
Creators: name: Rodrigues, W. A.
name: Lu, J. -Y.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the theory, the experimental evidence, and fundamental physical consequences concerning the existence of families of undistorted progressive waves (UPWs) of arbitrary speeds $0\leq v < \infty$, which are solutions of the homogeneous wave equation, Maxwell equations, and Dirac and Weyl equations.
description: 77 pages, Latex article, with figures. Includes corrections to the published version
The stable cohomology of self-equivalences of connected sums of products of spheres
Creators: name: Stoll, Robin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55R40 (Primary) 55P62, 18G85 (Secondary)

description: We identify the cohomology of the stable classifying space of homotopy automorphisms (relative to an embedded disk) of connected sums of $S^k \times S^l$, where $3 \le k < l \le 2k - 2$. The result is expressed in terms of Lie graph complex homology.
description: 63 pages. Version 2: Used a result of Li and Sun to simplify the proof and improve the stable range of the main result. Version 3: Generalized parts of the paper to apply to certain non-trivial coefficients. Version 4: Small correction; pre-copyediting version. Version 5: Used numbering of published version
Quantum phase transition of chiral Majorana fermion in the presence of disorder
Creators: name: Lian, Biao
name: Wang, Jing
name: Sun, Xiao-Qi
name: Vaezi, Abolhassan
name: Zhang, Shou-Cheng
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the quantum phase transitions of a disordered two-dimensional quantum anomalous Hall insulator with $s$-wave superconducting proximity, which are governed by the percolation theory of chiral Majorana fermions. Based on symmetry arguments and a renormalization group analysis, we show there are generically two phase transitions from Bogoliubov-de Gennes Chern number $\mathcal{N}=0$ to $\mathcal{N}=1$ ($p+ip$ chiral topological superconductor) and then to $\mathcal{N}=2$, in agreement with the conclusion from the band theory without disorders. Further, we discuss the critical scaling behavior of the $e^2/2h$ conductance half plateau induced by $\mathcal{N}=1$ chiral topological superconductor recently observed in the experiment. In particular, we compare the critical behavior of the half plateau induced by topological superconductor with that predicted recently by alternative explanations of the half plateau, and show that they can be distinguished in experiments.
description: 8 pages, 4 figures
Folheto digital Diga Não ao uso indiscriminado de medicamentos
Creators: name: Cavalcante, Andressa Rocha
name: Bezerra, Maria Lusia de Morais Belo
name: Fregadolli, Andrea Marques Vanderlei
name: Baltar, Solma Lúcia Souto Maior de Araújo
Publisher: name: Zenodo
Year: 2024
Subjects: Atenção à saúde
Educação em saúde
Comunidade
Medicação
Abuso

description: Trata-se de um folheto educativo com orientações em relação ao uso correto de medicamentos, buscando fornecer apoio, principalmente, aos usuários do Sistema Único de Saúde (SUS) em relação aos cuidados necessários para o uso racional de medicamentos. Este produto educacional digital foi fruto de um Trabalho de Conclusão de uma graduanda do Curso de Ciências Biológicas (Licenciatura) da Universidade Federal de Alagoas.
Superbroadcasting of mixed states
Creators: name: D'Ariano, Giacomo Mauro
name: Macchiavello, Chiara
name: Perinotti, Paolo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive the optimal universal broadcasting for mixed states of qubits. We show that the nobroadcasting theorem cannot be generalized to more than a single input copy. Moreover, for four or more input copies it is even possible to purify the input states while broadcasting. We name such purifying broadcasting superbroadcasting.
description: 4 pages, 4 figures, to appear on Phys. Rev. Lett
Comparison of Sky View Factor Estimates using Digital Surface Models
Creators: name: Adhikari, Bikalpa
Publisher: name: IUPUI University Library
Year: 2022
Subjects: SVF
RVT
UMEP
Horizon
ANOVA

description: Indiana University-Purdue University Indianapolis (IUPUI)
description: Better comprehension of the Urban Heat Island study requires information on the natural as well as built characteristics of the environment at high spatial resolution. Sky View Factor (SVF) has been distinguished as a significant parameter for Local Climate Zone (LCZ) classification based on environmental characteristics that influence the urban climate at finer spatial scales. The purpose of this thesis was to evaluate currently available data sources and methods for deriving continuous SVF estimates. The specific objectives were to summarize the characteristics of currently available digital surface models (DSMs) of the study region and to compare the results of using these models to estimate SVF with three different raster-based algorithms: Horizon Search Algorithm in R-programming (Doninck, 2018), Relief Visualization Toolbox (RVT) (Žiga et al., 2016), and the Urban Multi-scale Environmental Predictor (UMEP) plugin in QGIS (Lindberg, et al., 2018).
title: Transcription d'un entretien auprès d’une femme âgée de 19 ans ayant accouché de son premier enfant à la maternité German Urquidi de Cochabamba en Bolivie
Creators: name: Geffroy, Céline
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2017

description: Source: T-4921
description: A la question que lui pose l’enquêtrice, la jeune maman de 19 ans répond que c’est son premier enfant et sa première grossesse et que celle-ci s’est déroulée sous césarienne. Il n’y a pas eu de contact peau à peau mais la mère a eu un contact avec son bébé une fois propre et habillé. Il a été tout de suite placé au sein. L’enfant n’a pas eu de lait immédiatement et la mère a dû pratiquer un massage des seins pour stimuler la lactation. Elle a pu ensuite tirer son lait et lui donner le colostrum qu’elle décrit comme opaque, jaune mais dont elle ne connaît pas le nom. Elle dit qu’elle sait par les médecins et par sa mère que donner ce premier lait est important et elle pense que boire des jus ou des soupes aide à la lactation. L’enquêtrice demande également des renseignements sur la digestion du bébé et la nature de son urine et de ses selles. L’enquêtrice termine l’entretien en demandant s'il existe des différences entre les sexes des bébés par rapport à l’allaitement. L’entretien est interrompu par un appel au haut-parleur qui invite les personnes présentes à sortir de l’hôpital.
Provas académicas
Creators: name: Letras, RUA-L Revista Da Universidade De Aveiro
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação
Brev(E)idade | Namib | Redesenhar o verso | As mãos de quem ama | Não sou afluente desse rio | Também morri no Cunene, Regina Correia
Creators: name: Correia, Regina
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação
Development of Magnetic Labels for Magnetic Immunoassays: Towards Multiplexed Detection of Pancreatic Cancer Markers Using Giant-Magnetoresistive Sensor
Creators: name: Park, Jooneon
Publisher: name: University of Utah
Year: 2019
Subjects: subject: Chemical engineering
subject: FOS: Chemical engineering
subject: Nanotechnology
subject: FOS: Nanotechnology
subject: Physiology
subject: FOS: Biological sciences
subject: Oncology

description: For the last two decades, our research group has focused on developing nanotechnology-based diagnostic platforms for disease detection. One of our main diagnostic platforms is magnetic immunoassay based on giant magnetoresistance (GMR) readout. Due to high sensitivity and rapid data retrieval of the GMR readout, GMR-based immunoassays enable a low level of rapid detection of disease markers and have the potential for multiplexing (i.e., detecting multiple analytes simultaneously). As part of an effort to develop a GMR-based multiplexing test, this dissertation focuses on the development of magnetic labels for use in magnetic immunoassays. Thus, the body of this dissertation includes: (1) synthesis of magnetic nanoparticles (MNPs) with high magnetic moments; (2) emulsion-based bottom-up assembly approach to design new magnetic materials; (3) surface functionalization of MNPs and biomolecule conjugation for use as magnetic labels; and (4) development of magnetic immunoassays for the detection of potential pancreatic cancer markers using our GMR sensor. Firstly, silica encapsulation of ferrimagnetic nanocubes with high magnetic moments (m) is described. These results not only demonstrate the synthesis of high-m MNPs uniform in size and shape, but also stabilization of the MNPs with high m via silica coating. Secondly, the fabrication of colloidal assembly of MNPs is discussed with the investigation of their magnetic properties. This chapter shows that assembly of MNPs into a larger magnetic bead can not only change their magnetic properties, but also be an efficient way to design new materials for specific applications. Next, surface coating and biomolecule conjugation of the colloidally assembled magnetic beads are investigated to prepare magnetic labels. These results indicate that magnetic labels based on colloidally assembled magnetic beads are superior to commercially available magnetic labels. The last chapter is focused on the development of magnetic immunoassays for the simultaneous detection of pancreatic cancer markers based on our magnetic label and GMR sensor. The results show the potential of a GMR-based diagnostic platform in rapid and sensitive detection of disease marker, as well as multiplexing. With these results, this dissertation aims to the development of magnetic labels for GMR-based magnetic immunoassays towards simultaneous detection of multiple disease markers.
Neutrosophic Sets and Systems. An International Book Series, vol.10/2015
Creators: name: Smarandache, Florentin
name: Ali, Mumtaz
Publisher: name: figshare
Year: 2018
Subjects: Algebra

description: “Neutrosophic Sets and Systems” has been created for publications on advanced studies in neutrosophy, neutrosophic set, neutrosophic logic, neutrosophic probability, neutrosophic statistics that started in 1995 and their applications in any field, such as the neutrosophic structures developed in algebra, geometry, topology, etc.
Movimentos sufocados | Março esparso | Raízes traídas, Maria Fraterna
Creators: name: Fraterna, Maria
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação
The theory of canonical perturbations applied to attitude dynamics and to the Earth rotation. Osculating and nonosculating Andoyer variables
Creators: name: Efroimsky, Michael
name: Escapa, Alberto
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: Dynamical Systems (math.DS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The Hamiltonian theory of Earth rotation, known as the Kinoshita-Souchay theory, operates with nonosculating Andoyer elements. This situation parallels a similar phenomenon that often happens (but seldom gets noticed) in orbital dynamics, when the standard Lagrange-type or Delaunay-type planetary equations unexpectedly render nonosculating orbital elements. In orbital mechanics, osculation loss happens when a velocity-dependent perturbation is plugged into the standard planetary equations. In attitude mechanics, osculation is lost when an angular-velocity-dependent disturbance is plugged in the standard dynamical equations for the Andoyer elements. We encounter exactly this situation in the theory of Earth rotation, because this theory contains an angular-velocity-dependent perturbation (the switch from an inertial frame to that associated with the precessing ecliptic of date). While the osculation loss does not influence the predictions for the figure axis of the planet, it considerably alters the predictions for the instantaneous spin-axis' orientation. We explore this issue in great detail.
Convex Hulls of Grassmannians and Combinatorics of Symmetric Hypermatrices
Creators: name: Narita, Kazumasa
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B20, 52A37

description: It is known that the complex Grassmannian of $k$-dimensional subspaces can be identified with the set of projection matrices of rank $k$. It is also classically known that the convex hull of this set is the set of Hermitian matrices with eigenvalues between $0$ and $1$ and summing to $k$. We give a new proof of this fact. We also give an existence theorem for a certain combinatorial class of hypermatrices by a similar argument. This existence theorem can be rewritten into an existence theorem for a uniform weighted hypergraph with given weighted degree sequence.
description: 12 pages. Final version. Cosmetic changes made from the previous version
Amor | Destino | Vida | Solidão | Saudade | Tristeza | Fome, Luís Aguiar
Creators: name: Aguiar, Luís
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação
Universal Tan relations for quantum gases in one dimension
Creators: name: Patu, Ovidiu I.
name: Klumper, Andreas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate universal properties of one-dimensional multi-component systems comprised of fermions, bosons, or an arbitrary mixture, with contact interactions and subjected to an external potential. The masses and the coupling strengths between different types of particles are allowed to be different and we also take into account the presence of an arbitrary magnetic field. We show that the momentum distribution of these systems exhibits a universal $n_σ(k) \sim C_σ/k^4$ decay with $C_σ$ the contact of species $σ$ which can be computed from the derivatives of an appropriate thermodynamic potential with respect to the scattering lengths. In the case of integrable fermionic systems we argue that at fixed density and repulsive interactions the total contact reaches its maximum in the balanced system and monotonically decreases to zero as we increase the magnetic field. The converse effect is present in integrable bosonic systems: the contact is largest in the fully polarized state and reaches its minimum when all states are equally populated. We obtain short distance expansions for the Green's function and pair distribution function and show that the coefficients of these expansions can be expressed in terms of the density, kinetic energy and contact. In addition we derive universal thermodynamic identities relating the total energy of the system, pressure, trapping energy and contact. Our results are valid at zero and finite temperature, for homogeneous or trapped systems and for few-body or many-body states.
description: 12 pages, RevTeX 4.1
MPEC 2024-U141 : 2024 UB4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 UB4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Development of Low-Cost, Mobile, and Scalable Motion Tracking Using Wireless AHRS Modules
Creators: name: Taylor, Thomas Dale
Publisher: name: University of Utah
Year: 2019
Subjects: Computer Engineering
Robotics

description: Motion capture has applications in many fields. A need has arisen for motion capture systems that are low-cost, mobile, and intuitive. An attitude heading reference system (AHRS) calculates the global orientation of a rigid body by synthesizing the output from an array of sensors. A complete motion capture system utilizing gyroscopes, accelerometers, and magnetometers attached to the main body segments of a human is proposed. This is accomplished by providind a low-cost calibration procedure for micro electro-mechanical system (MEMS) gyroscopes, accelerometers, and magnetometers in order to create a custom AHRS unit. The accuracy of reproducing global orientations using these AHRS units is analyzed for individual modules as well as redundant groups of AHRS nodes for increased accuracy. In order to make the system intuitive, a localization procedure for finding the locations of all AHRS units attached to the body is proposed. Sensors were successfully calibrated to an accuracy sufficient for AHRS development. The accuracy of the AHRS units was verified and led to a functioning motion capture system. The localization procedure was verified with volunteer subjects and successfully finds the location of all attached AHRS units.
Global Symmetries in the Antifield-Formalism
Creators: name: Brandt, Friedemann
name: Henneaux, Marc
name: Wilch, André
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, two things are done. (i) First, it is shown that any global symmetry of a gauge-invariant theory can be extended to the ghosts and the antifields so as to leave invariant the solution of the master-equation (before gauge fixing). (ii) Second, it is proved that the incorporation of the rigid symmetries to the solution of the master-equation through the introduction of a constant ghost for each global symmetry can be obstructed already at the classical level whenever the theory possesses higher order conservation laws. Explicit examples are given.
description: 12 pages, no figures, latex
Dynamical ion transfer between coupled Coulomb crystals in a double well potential
Creators: name: Klumpp, Andrea
name: Zampetaki, Alexandra
name: Schmelcher, Peter
Publisher: name: arXiv
Year: 2017
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We investigate the non-equilibrium dynamics of coupled Coulomb crystals of different sizes trapped in a double well potential. The dynamics is induced by an instantaneous quench of the potential barrier separating the two crystals. Due to the intra- and inter-crystal Coulomb interactions and the asymmetric population of the potential wells we observe a complex reordering of ions within the two crystals as well as ion transfer processes from one well to the other. The study and analysis of the latter processes constitutes the main focus of this work. In particular we examine the dependence of the observed ion transfers on the quench amplitude performing an analysis for different crystalline configurations ranging from one-dimensional ion chains via two-dimensional zig-zag chains and ring structures to three-dimensional spherical structures. Such an analysis provides us with the means to extract the general principles governing the ion transfer dynamics and we gain some insight on the structural disorder caused by the quench of the barrier height.
A rapariga que lia para os mortos, João de Mancelos
Creators: name: Mancelos, João De
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação
A Deep Neural Network for Knot Placement in B-spline Approximation
Creators: name: Luo, Jiaqi
name: Wen, Zepeng
name: Kang, Hongmei
name: Yang, Zhouwang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Automatically determining knot number and positions is a fundamental and challenging problem in B-spline approximation. In this paper, the knot placement is abstracted as a mapping from initial knots to the optimal knots. We innovatively introduce a deep neural network solver to approximate the mapping. The neural network is composed of several subnetworks. Each subnetwork is designed to approximate the optimal knot positions in the case of fixed knot number. All the subnetworks are stacked together to find the optimal knots (including knot number and knot positions) within some given tolerance. Owing to the powerful approximation capabilities, as well as mature algorithms developed in deep learning, the proposed method can effectively and efficiently find the optimal knot number and knot positions. Several numerical examples are demonstrated to show the superiority of our method.
CHSH violation and entropy - concurrence plane
Creators: name: Derkacz, L.
name: Jakobczyk, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We characterize violation of CHSH inequalities for mixed two-qubit states by their mixedness and entanglement. The class of states that have maximum degree of CHSH violation for a given linear entropy is also constructed.
Hard X-ray Emission from the M87 AGN Detected with NuSTAR
Creators: name: Wong, Ka-Wah
name: Nemmen, Rodrigo S.
name: Irwin, Jimmy A.
name: Lin, Dacheng
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: M87 hosts a 3-6 billion solar mass black hole with a remarkable relativistic jet that has been regularly monitored in radio to TeV bands. However, hard X-ray emission \gtrsim 10keV, which would be expected to primarily come from the jet or the accretion flow, had never been detected from its unresolved X-ray core. We report NuSTAR detection up to 40 keV from the the central regions of M87. Together with simultaneous Chandra observations, we have constrained the dominant hard X-ray emission to be from its unresolved X-ray core, presumably in its quiescent state. The core spectrum is well fitted by a power law with photon index Gamma=2.11 (+0.15 -0.11). The measured flux density at 40 keV is consistent with a jet origin, although emission from the advection-dominated accretion flow cannot be completely ruled out. The detected hard X-ray emission is significantly lower than that predicted by synchrotron self-Compton models introduced to explain emission above a GeV.
description: 5 pages, 4 figures, updated to better match the published version in the Astrophysical Journal Letters. A minor typo in the published version (angular scale should be 1 arcsec = 78 pc instead, no result of the paper is affected) is fixed here
title: ADCO, Grènetier de Cîteaux : comptes (1499-1503) (11 H 1173), f. 00144
Creators: name: de la Côte-d'Or, Archives départementales
name: CBMA/CG21/F.PETOT/2019
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: comptes
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Grènetier de Cîteaux : comptes (1499-1503), Archives départementales de la Côte-d'Or, (11 H 1173). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Grènetier de Cîteaux : comptes (1499-1503), Archives départementales de la Côte-d'Or, (11 H 1173), f. 00144, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
ARKODE: a flexible IVP solver infrastructure for one-step methods
Creators: name: Reynolds, Daniel R.
name: Gardner, David J.
name: Woodward, Carol S.
name: Chinomona, Rujeko
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Software (cs.MS)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We describe the ARKODE library of one-step time integration methods for ordinary differential equation (ODE) initial-value problems (IVPs). In addition to providing standard explicit and diagonally implicit Runge--Kutta methods, ARKODE also supports one-step methods designed to treat additive splittings of the IVP, including implicit-explicit (ImEx) additive Runge--Kutta methods and multirate infinitesimal (MRI) methods. We present the role of ARKODE within the SUNDIALS suite of time integration and nonlinear solver libraries, the core ARKODE infrastructure for utilities common to large classes of one-step methods, as well as its use of ``time stepper'' modules enabling easy incorporation of novel algorithms into the library. Numerical results show example problems of increasing complexity, highlighting the algorithmic flexibility afforded through this infrastructure, and include a larger multiphysics application leveraging multiple algorithmic features from ARKODE and SUNDIALS.
On the Dirac-Born-Infeld Action for D-branes
Creators: name: Cederwall, Martin
name: von Gussich, Alexander
name: Mikovic, Aleksandar
name: Nilsson, Bengt E. W.
name: Westerberg, Anders
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note, we consider the reformulation of the Dirac-Born-Infeld action for a Dirichlet p-brane in Brink-Di Vecchia-Howe-Tucker form, i.e., including an independent non-propagating world-volume metric. When p>2, the action becomes non-polynomial. A closed expression is derived for p=3. For selfdual field-strengths, the DBI action is reproduced by an action with a simple F^2 term. We speculate on supersymmetrization of the D_3-brane action. We also give the governing equations for arbitrary p, and derive an implicit expression for the D_4-brane lagrangian.
description: Plain TeX, 7 pages, TeX file and one postscript figure in compressed tar archive
Evaporation/Antievaporation and energy conditions in alternative gravity
Creators: name: Addazi, Andrea
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the evaporation and antievaporation instabilities of Nariai solution in extended theories of gravity. These phenomena were explicitly shown in several different extensions of General Relativity, suggesting that a universal cause is behind them. We show that evaporation and antievaporation are originated from deformations of energy conditions on the Nariai horizon. Energy conditions get new contributions from the extra propagating degrees of freedom, which can provide extra focalizing or antifocalizing terms in the Raychanduri equation. We also show two explicit examples in $f(R)$-gravity and Gauss-Bonnet gravity.
O príncipe mais que perfeito | Contos de mal dizer: o cão, Isabel Cristina Pires
Creators: name: Pires, Isabel Cristina
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação
The Low Excitation Planetary Nebulae HuDo 1 and HuBi 1 and their [WC10] Central Stars
Creators: name: Pena, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Low- and high-resolution spectra of the planetary nebulae HuDo 1 and HuBi 1, around [WC-late] stars, are analyzed. The objects belong to the galactic disk, with heliocentric radial velocities of -12 km/s (HuDo 1) and 57 km/s (HuBi 1). C(Hbeta) reddening values are of 2.04 for HuDo 1 and 1.22 for HuBi 1. Plasma line ratios are used to estimate physical conditions and abundances. We find log (O/H)+12 = 8.43 and 8.57, and N/O = 0.2 and 0.1 for HuDo 1 and HuBi 1 respectively. HuBi 1 is the only PN excited by a very late [WC] star showing intense nebular HeI recombination lines. From the stellar lines we derive a [WC 10] type for both stars, although HuBi 1 central star should be slightly hotter for providing a large amount of He^0 ionizing photons. Nebular and stellar parameters of HuDo 1 and HuBi 1 are compared with those of other [WC 10] objects, concluding that the stars of HuDo 1 and HuBi 1 should be intrinsically fainter. In particular HuBi 1 seems a low-density evolved nebula around a low-mass slowly-evolving star.
description: 11 pages, 8 figures, accepted in Revista Mexicana de Astronomia y Astrofisica
Non-radial oscillations and global stellar properties of anisotropic compact stars using realistic equations of state
Creators: name: Curi, Elvis J. Aquino
name: Castro, Luis B.
name: Flores, Cesar V.
name: Lenzi, César H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work, we have made a systematic study of how the gravitational wave frequency of the fundamental mode from compact stars is affected by anisotropic effects using realistic equations of state. Our study is an extension of the seminal research performed by Doneva [Phys. Rev. D 85 (2012) 124023], where a polytropic equation of state was used. To achieve our objective, we considered compact stars which were built by using equations of state in the framework of a relativistic mean field theory for the case of hadronic stars and in the framework of the MIT model for the case of quark stars. In order to obtain some pertinent information that could give us the possibility to detect the anisotropy in compact stars, we also studied and analized the behaviour of various global stellar quantities, e.g., gravitational redshift, stellar mass, radius, among others. We concluded that the anisotropic effects can have important consequences, which are strongly related to the anisotropic parameter and the equation of state of high density matter. Additionally, a comparison with observational data has been made and we have shown that the anisotropic parameter $λ$ can be used as a tuning parameter to reproduce mass and radius observational data of neutron stars.
description: 13 pages, 14 figures e 2 tables
Environmental Noise and the Cardiovascular System
Creators: name: Muenzel, Thomas
name: Daiber, Andreas
name: Sørensen, Mette
name: Schmidt, Frank
name: Steven, Sebastian
name: Herzog, Johannes
Publisher: name: figshare
Year: 2018
Subjects: subject: 50205 Environmental Management
subject: FOS: Earth and related environmental sciences
subject: 50203 Environmental Education and Extension
subject: 50206 Environmental Monitoring
subject: Environmental Science
subject: 50299 Environmental Science and Management not elsewhere classified
subject: 59999 Environmental Sciences not elsewhere classified

description: Noise has been found associated with annoyance, stress, sleep disturbance, and impaired cognitive performance. Furthermore, epidemiological studies have found that environmental noise is associated with an increased incidence of arterial hypertension, myocardial infarction, heart failure, and stroke. Observational and translational studies indicate that especially nighttime noise increases levels of stress hormones and vascular oxidative stress, which may lead to endothelial dysfunction and arterial hypertension. Novel experimental studies found aircraft noise to be associated with oxidative stress–induced vascular damage, mediated by activation of the NADPH oxidase, uncoupling of endothelial nitric oxide synthase, and vascular infiltration with inflammatory cells. Transcriptome analysis of aortic tissues from animals exposed to aircraft noise revealed changes in the expression of genes responsible for the regulation of vascular function, vascular remodeling, and cell death. This review focuses on the mechanisms and the epidemiology of noise-induced cardiovascular diseases and provides novel insight into the mechanisms underlying noise-induced vascular damage.
Experimental demonstration of fractional orbital angular momentum entanglement of two photons
Creators: name: Oemrawsingh, S. S. R.
name: Ma, X.
name: Voigt, D.
name: Aiello, A.
name: Eliel, E. R.
name: Hooft, G. W. 't
name: Woerdman, J. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The singular nature of a non-integer spiral phase plate allows easy manipulation of spatial degrees of freedom of photon states. Using two such devices, we have observed very high dimensional (D > 3700) spatial entanglement of twin photons generated by spontaneous parametric down-conversion.
description: submitted to Phys. Rev. Lett
Transport of internetwork magnetic flux elements in the solar photosphere
Creators: name: Agrawal, Piyush
name: Rast, Mark P.
name: Gosic, Milan
name: Rubio, Luis R. Bellot
name: Rempel, Matthias
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The motions of small-scale magnetic flux elements in the solar photosphere can provide some measure of the Lagrangian properties of the convective flow. Measurements of these motions have been critical in estimating the turbulent diffusion coefficient in flux-transport dynamo models and in determining the Alfven wave excitation spectrum for coronal heating models. We examine the motions of internetwork flux elements in a 24 hour long Hinode/NFI magnetogram sequence with 90 second cadence, and study both the scaling of their mean squared displacement and the shape of their displacement probability distribution as a function of time. We find that the mean squared displacement scales super-diffusively with a slope of about 1.48. Super-diffusive scaling has been observed in other studies for temporal increments as small as 5 seconds, increments over which ballistic scaling would be expected. Using high-cadence MURaM simulations, we show that the observed super-diffusive scaling at short temporal increments is a consequence of random changes in the barycenter positions due to flux evolution. We also find that for long temporal increments, beyond granular lifetimes, the observed displacement distribution deviates from that expected for a diffusive process, evolving from Rayleigh to Gaussian. This change in the distribution can be modeled analytically by accounting for supergranular advection along with motions due to granulation. These results complicate the interpretation of magnetic element motions as strictly advective or diffusive on short and long timescales and suggest that measurements of magnetic element motions must be used with caution in turbulent diffusion or wave excitation models. We propose that passive trace motions in measured photospheric flows may yield more robust transport statistics.
description: submitted to ApJ
Invariant Regularization of Anomaly-Free Chiral Theories
Creators: name: Chang, Lay Nam
name: Soo, Chopin
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a generalization of the Frolov-Slavnov invariant regularization scheme for chiral fermion theories in curved spacetimes. local gauge symmetries of the theory, including local Lorentz invariance. The perturbative scheme works for arbitrary representations which satisfy the chiral gauge anomaly and the mixed Lorentz-gauge anomaly cancellation conditions. Anomalous theories on the other hand manifest themselves by having divergent fermion loops which remain unregularized by the scheme. Since the invariant scheme is promoted to also include local Lorentz invariance, spectator fields which do not couple to gravity cannot be, and are not, introduced. Furthermore, the scheme is truly chiral (Weyl) in that all fields, including the regulators, are left-handed; and only the left-handed spin connection is needed. The scheme is, therefore, well suited for the study of the interaction of matter with all four known forces in a completely chiral fashion. In contrast with the vectorlike formulation, the degeneracy between the Adler-Bell-Jackiw current and the fermion number current in the bare action is preserved by the chiral regularization scheme.
description: 28pgs, LaTeX. Typos corrected. Further remarks on singlet currents
Relationships between health care behaviors, anxiety, social support and quality of life among pregnant women with pregnancy induced hypertension
Creators: name: Duangporn Maitreechit
name: Siriwan Sangin
name: Supit Siriarunrat
Publisher: name: Faculty of Medicine Chulalongkorn University
Year: 2020
Subjects: Quality of life, health care behaviors, anxiety, social support, pregnancy induced hypertension

description: Chulalongkorn Medical Bulletin, 2, 1, 039-047
Mesoscopic Simulations of Active-Nematics
Creators: name: Kozhukhov, Timofey
name: Shendruk, Tyler N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Coarse-grained, mesoscale simulations are invaluable for studying soft condensed matter because of their ability to model systems in which a background solvent plays a significant role but is not the primary interest. Such methods generally model passive solvents; however, far-from-equilibrium systems may also be composed of complex solutes suspended in an active fluid. Yet, few coarse-grained simulation methods exist to model an active medium. We introduce an algorithm to simulate active nematics, which builds on multi-particle collision dynamics (MPCD) for passive fluctuating nematohydrodynamics by introducing dipolar activity in the local collision operator. Active-nematic MPCD (AN-MPCD) simulations exhibit the key characteristics of active nematic turbulence but, as a particle-based algorithm, also reproduce crucial attributes of active particle models. Thus, mesoscopic AN-MPCD is an approach that bridges microscopic and continuum descriptions, allowing novel simulations of composite active-passive systems.
description: 16 pages, 13 figures
Ultracentrifugation for ultrafine nanodiamond fractionation
Creators: name: Koniakhin, S. V.
name: Besedina, N. A.
name: Kirilenko, D. A.
name: Shvidchenko, A. V.
name: Eidelman, E. D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: In this paper we propose a method for ultrafine fractionation of nanodiamonds using the differential centrifugation in the fields up to 215000g. The developed protocols yield 4-6 nm fraction giving main contribution to the light scattering intensity. The desired 4-6 nm fraction can be obtained from various types of initial nanodiamonds: three types of detonation nanodiamonds differing in purifying methods, laser synthesis nanodiamonds and nanodiamonds made by milling. The characterization of the obtained hydrosols was conducted with Dynamic Light Scattering, Zeta potential measurements, powder XRD and TEM. According to powder XRD and TEM data ultracentrifugation also leads to a further fractionation of the primary diamond nanocrystallites in the hydrosols from 4 to 2 nm.
description: 7 pages, 8 figures
Multiple Realisations of N=1 Vacua in Six Dimensions
Creators: name: Gimon, Eric G.
name: Johnson, Clifford V.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A while ago, examples of N=1 vacua in D=6 were constructed as orientifolds of Type IIB string theory compactified on the K3 surface. Among the interesting features of those models was the presence of D5-branes behaving like small instantons, and the appearance of extra tensor multiplets. These are both non-perturbative phenomena from the point of view of heterotic string theory. Although the orientifold models are a natural setting in which to study these non-perturbative Heterotic string phenomena, it is interesting and instructive to explore how such vacua are realised in Heterotic string theory, M-theory and F-theory, and consider the relations between them. In particular, we consider models of M-theory compactified on K3 x S^1/Z_2 with fivebranes present on the interval. There is a family of such models which yields the same spectra as a subfamily of the orientifold models. By further compactifying on T^2 to four dimensions we relate them to Heterotic string spectra. We then use Heterotic/Type IIA duality to deduce the existence of Calabi-Yau 3-folds which should yield the original six dimensional orientifold spectra if we use them to compactify F-theory. Finally, we show in detail how to take a limit of such an F-theory compactification which returns us to the Type IIB orientifold models.
description: Uses harvmac.tex and epsf.tex, 22 pages (harvmac `b'), 1 figure
Réplica Itinerante, Ana M. M. Santos
Creators: name: M. M. Santos, Ana
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação
Whisner Fraga (2022), Usufruto de demônios
Creators: name: Gonçalves, Adelto
Publisher: name: RUA-L: Revista da Universidade de Aveiro. Letras
Year: 2024

description: Sem resumo disponível.
description: RUA-L: Revista da Universidade de Aveiro. Letras, n.º 11 (2022): Novas abordagens em linguística contrastiva: da teoria à aplicação