cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Equilibrium magnetization in the vicinity of the first order phase transition in the mixed state of high-Tc superconductors
Creators: name: Landau, I. L.
name: Ott, H. R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present the results of a scaling analysis of isothermal magnetization M(H) curves measured in the mixed state of high-Tc superconductors in the vicinity of the established first order phase transition. The most surprising result of our analysis is that the difference between the magnetization above and below the transition may have either sign, depending on the particular chosen sample. We argue that this observation, based on M(H) data available in the literature, is inconsistent with the interpretation that the well known first order phase transition in the mixed state of high-Tc superconductors always represents the melting transition in the vortex system.
description: 4 pages, 5 figures
Analysis of the Axial Anomaly on the Lattice with O(a)-improved Wilson Action
Creators: name: Guadagnoli, D.
name: Simula, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Flavor singlet and non-singlet axial Ward identities are investigated using the Wilson formulation of lattice QCD with Clover O(a)-improvement, which breaks explicitly chiral symmetry. The matching at one-loop order of all the relevant renormalization constants with the continuum \bar{MS} scheme is presented. Our calculations include: 1) the contributions arising from the Clover term of the action; 2) the complete mixing of the gluon operator G \tilde{G} with the divergence of the singlet axial current; 3) the use of both local and extended definitions of the fermionic bilinear operators. A definition of the gluon operator G \tilde{G} on the lattice outside the chiral limit is proposed. Our definition takes into account the possible power-divergent mixing with the pseudoscalar density, generated by the breaking of chiral symmetry. A non-perturbative procedure for the evaluation of such mixing constant is worked out. Finally, the renormalization properties of the composite insertion of the topological charge operator relevant for the lattice calculation of the neutron electric dipole moment, induced by the strong CP-violating term of the QCD Lagrangian, are discussed.
description: latex 27 pages
RXJ1856.5-3754 and RXJ0720.4-3125 are P-Stars
Creators: name: Cea, Paolo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: P-stars are a new class of compact stars made of up and down quarks in $β$-equilibrium with electrons in a chromomagnetic condensate. P-stars are able to account for compact stars with $R \lesssim 6 Km$, as well as stars comparable to canonical neutron stars. We show that P-stars once formed are absolutely stable, for they cannot decay into neutron or strange stars. We convincingly argue that the nearest isolated compact stars RXJ1856.5-3754 and RXJ0720.4-3125 could be interpreted as P-stars with $M \simeq 0.8 M_{\bigodot}$ and $R \simeq 5 Km$.
description: 18 pages, 2 figures, revised version, to appear in JCAP
BeppoSAX observations of Seyfert 1s in the Piccinotti sample I: poorly studied sources
Creators: name: Quadrelli, A.
name: Malizia, A.
name: Bassani, L.
name: Malaguti, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this work we present the first of two papers devoted to the study of the X-ray spectral characteristics of Seyfert 1 galaxies in the Piccinotti sample. In particular we analyse here the BeppoSAX broad band (0.1-100 keV) data of 4 objects which, despite their X-ray brightness, have been historically poorly studied due to their late identification with an AGN; these are H0111-149 (MKN1152), H0235-525 (ESO198-G24), H0557-385 (IRAS F05563-3820) and H1846-786 (IRAS F18389-7834). We have assumed for all the sources a baseline model which includes a power law with an exponential cut-off plus a reflection component and an iron K_alpha line; we have also searched for the presence of intrinsic absorption and/or a soft excess component. Our analysis indicates the presence of complex absorption in two objects (H0557-385 and H0111-149) best described by a combination of two uniform absorbers, one cold and one warm. Only in one source, H0557-385, a soft excess component has been measured. The primary continuum is best described by a canonical power law (Gamma=1.7-2) with a high energy cut-off in the range 40-130 keV. A cold reflection component is likely present in all sources with values ranging from less than 0.6 to higher than 2. In 3 out of 4 objects we find a cold iron line having equivalent width typical of Seyfert 1s (100-200 eV).
description: 6 pages, 2 figures, accepted for publication as a Research Note in Astronomy and Astrophysics
Pure-spinor superstrings in d=2,4,6
Creators: name: Wyllard, Niclas
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We continue the study of the d=2,4,6 pure-spinor superstring models introduced in [1]. By explicitly solving the pure-spinor constraint we show that these theories have vanishing central charge and work out the (covariant) current algebra for the Lorentz currents. We argue that these super-Poincare covariant models may be thought of as compactifications of the superstring on CY_{4,3,2}, and take some steps toward making this precise by constructing a map to the RNS superstring variables. We also discuss the relation to the so called hybrid superstrings, which describe the same type of compactifications.
description: 27 pages
Neutral hydrogen surveys for high redshift galaxy clusters and proto-clusters
Creators: name: Battye, Richard A.
name: Davies, Rod D.
name: Weller, Jochen
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the possibility of performing blind surveys to detect large-scale features of the universe using 21cm emission. Using instruments with approx. 5'-10' resolution currently in the planning stage, it should be possible to detect virialized galaxy clusters at intermediate redshifts using the combined emission from their constituent galaxies, as well as less overdense structures, such as proto-clusters and the `cosmic web', at higher redshifts. Using semi-analytic methods we compute the number of virialized objects and those at turnaround which might be detected by such surveys. We find a surprisingly large number of objects might be detected even using small (approx. 5%) bandwidths and elaborate on some issues pertinent to optimising the design of the instrument and the survey strategy. The main uncertainty is the fraction of neutral gas relative to the total dark matter within the object. We discuss this issue in the context of the observations which are currently available.
description: 10 pages, 6 figures
Investigation of π-π Interactions between TNT and (R)-Hexahelicene
Creators: name: Caglar Celik Bayar
name: Turker, Lemi
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Physiology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 60506 Virology

description: The detection of an energetic molecule TNT is an important issue especially in military applications and as a result many of the studies focused on this subject in the literature. In this study, except from the literature, the possible interactions between TNT and polycyclic aromatic chiral compound (R)-Hexahelicene were examined theoretically in terms of non-covalent π-π interactions, theoretically. It was observed that (R)-Hexahelicene had such interactions with TNT via the 2nd and 3rd six-membered rings of its exterior surface. NICS(1) aromaticity analyses, interaction energy calculations, interaction energy-NICS(1) relationships, UV-visible and electronic circular dichroism analyses and frontier molecular orbital analyses with reactivity and stability predictions were all performed to make sure that such interactions may occur between the suggested couples. A hybrid DFT functional of M06-2X was used with 6-31 + G(d,p) basis set throughout the study. It was concluded that (R)-Hexahelicene may serve as a good surface to make π-π interactions with TNT.
Dynamical Systems, Topology and Conductivity in Normal Metals
Creators: name: Maltsev, A. Ya.
name: Novikov, S. P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: New observable integer-valued numbers of the topological origin were revealed by the present authors studying the conductivity theory of single crystal 3D normal metals in the reasonably strong magnetic field ($B \leq 10^{3} Tl$). Our investigation is based on the study of dynamical systems on Fermi surfaces for the motion of semi-classical electron in magnetic field. All possible asymptotic regimes are also found for $B \to \infty$ based on the topological classification of trajectories.
description: Latex, 51 pages, 14 eps figures
Simultaneous approximation by conjugate algebraic numbers in fields of transcendence degree one
Creators: name: Roy, Damien
Publisher: name: arXiv
Year: 2004
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J13, 11J82

description: We present a general result of simultaneous approximation to several transcendental real, complex or p-adic numbers xi_1,...,xi_t by conjugate algebraic numbers of bounded degree over Q, provided that the given transcendental numbers xi_1,...,xi_t generate over Q a field of transcendence degree one. We provide sharper estimates for example when xi_1,...,xi_t form an arithmetic progression with non-zero algebraic difference, or a geometric progression with non-zero algebraic ratio different from a root of unity. In this case, we also obtain by duality a version of Gel'fond's transcendence criterion expressed in terms of polynomials of bounded degree taking small values at xi_1,...,xi_t.
description: 25 pages, minor corrections from version 1, to appear in International Journal of Number Theory
Forms on Vector Bundles Over Hyperbolic Manifolds and the Conformal Anomaly
Creators: name: Bytsenko, A. A.
name: Elizalde, E.
name: Ulhoa, R. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81T50, 14D21,58A10

description: We study gauge theories based on abelian $p-$forms on real compact hyperbolic manifolds. An explicit formula for the conformal anomaly corresponding to skew--symmetric tensor fields is obtained, by using zeta--function regularization and the trace tensor kernel formula. Explicit exact and numerical values of the anomaly for $p-$forms of order up to $p=4$ in spaces of dimension up to $n=10$ are then calculated.
description: 13 pages, 2 tables
Spin-Voltaic Effect and its Implications
Creators: name: Zutic, Igor
name: Fabian, Jaroslav
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: In an inhomogeneously doped magnetic semiconductor, an interplay between an equilibrium magnetization and injected nonequilibrium spin leads to the spin-voltaic effect--a spin analogue of the photo-voltaic effect. By reversing either the sign of the equilibrium magnetization or the direction of injected spin polarization it is possible to switch the direction of charge current in a closed circuit or, alternatively, to switch the sign of the induced open-circuit voltage. Properties of the spin-voltaic effect can be used to perform all-electrical measurements of spin relaxation time and injected spin polarization, as well as to design devices with large magnetoresistance and spin-controlled amplification.
description: 4 pages, 2 figures; submitted to Materials Transactions, special issue on Nano-Hetero Structures in Advanced Metallic Materials
Discovery of new members of the nearby young stellar association in Cepheus
Creators: name: Klutsch, A.
name: Frasca, A.
name: Guillout, P.
name: Montes, D.
name: Pineau, F. -X.
name: Grosso, N.
name: Stelzer, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Young field stars are hardly distinguishable from older ones because their space motion rapidly mixes them with the stellar population of the Galactic plane. Nevertheless, a careful target selection allows for young stars to be spotted throughout the sky. We aim to identify additional sources associated with the four young comoving stars that we discovered towards the CO Cepheus void and to provide a comprehensive view of the Cepheus association. Based on multivariate analysis methods, we have built an extended sample of 193 young star candidates, which are the optical and infrared counterparts of ROSAT All-Sky Survey and XMM-Newton X-ray sources. From optical spectroscopic observations, we measured their radial velocity with the cross-correlation technique. We derived their atmospheric parameters and projected rotational velocity with the code ROTFIT. We applied the subtraction of inactive templates to measure the lithium equivalent width, from which we infer their lithium abundance and age. Finally, we studied their kinematics using the second Gaia data release. Our sample is mainly composed of young or active stars and multiple systems. We identify two distinct populations of young stars that are spatially and kinematically separated. Those with an age between 100 and 300 Myr are mostly projected towards the Galactic plane. In contrast, 23 of the 37 sources younger than 30 Myr are located in the CO Cepheus void, and 21 of them belong to the stellar kinematic group that we previously reported in this sky area. We report a total of 32 bona fide members and nine candidates for this nearby (distance = 157$\pm$10 pc) young (age = 10-20 Myr) stellar association. According to the spatial distribution of its members, the original cluster is already dispersed and partially mixed with the local population of the Galactic plane.
description: 16 pages, 14 figures, 2 tables (46 pages, 27 figures, and 10 tables when including online material). Accepted for publication in A&A
Regular Black Holes in Rainbow Gravity
Creators: name: Junior, Ednaldo L. B.
name: Rodrigues, Manuel E.
name: Silva, Marcos V. de S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we consider that in energy scales greater than the Planck energy, the geometry, fundamental physical constants, as charge, mass, speed of light and Newtonian constant of gravitation, and matter fields will depend on the scale. This type of theory is known as Rainbow Gravity. We coupled the nonlinear electrodynamics to the Rainbow Gravity, defining a new mass function $M(r,ε)$, such that we may formulate new classes of spherically symmetric regular black hole solutions, where the curvature invariants are well-behaved in all spacetime. The main differences between the General Relativity and our results in the the Rainbow gravity are: a) The intensity of the electric field is inversely proportional to the energy scale. The higher the energy scale, the lower the electric field intensity; b) the region where the strong energy condition (SEC) is violated decrease as the energy scale increase. The higher the energy scale, closer to the radial coordinate origin SEC is violated.
description: 12 pages, 8 figures
The non-commutative Hardy-Littlewood maximal function on symmetric spaces of $τ-$measurable operators
Creators: name: Nessipbayev, Y.
name: Tulenov, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this paper, we investigate the Hardy-Littlewood maximal function on non-commutative symmetric spaces. We complete the results of T. Bekjan and J. Shao. Moreover, we refine the main results of the papers \cite{Bek} and \cite{Sh}.
description: 13. arXiv admin note: text overlap with arXiv:1908.09548
Theoretical insights into the antioxidant activity of moracin T
Creators: name: Houssem Boulebd
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Computational Biology

description: Moracin T is a natural product isolated from Morus mesozygia (Moraceae), which acts as potent antioxidant agent. In this study, density functional theory-based computational methods have been performed to evaluate systematically the radical scavenging behaviour of this compound. Structural characteristics such as frontier molecular orbitals and molecular electrostatic potential mapping have been investigated. Thermodynamic parameters related to the three main antiradical mechanisms, hydrogen atom transfer (HAT), sequential electron transfer proton transfer (SETPT), and sequential proton loss electron transfer (SPLET) have been studied. In addition, two variants of SPLET mechanism namely sequential proton loss hydrogen atom transfer (SPLHAT) and double sequential proton loss electron transfer (D-SPLET) have been investigated. The reaction of moracin T with hydroperoxyl radical (HOO•), as representative reactive oxygen species, was also studied. The obtained results are of great significance in better understanding the chemical mechanism of the radical-scavenging action and open new perspectives for the design of new potent antioxidant agents.
title: Flexible holographic metasurfaces
Creators: name: Burch, James
Publisher: name: University of St Andrews
Year: 2019

description: Metasurface holography has attracted much attention in recent years because of its practical applications including anti-counterfeiting, sensing, and lensing. However, most metasurface holograms have been constrained to rigid substrates which limit their out-of-the-lab value. Flexible holographic metasurfaces offer increased post-fabrication tunability as they can be bent or stretched, can be conformed to real-world non-flat surfaces, and are compatible with commercially viable roll-to-roll fabrication methods. This thesis describes how flexible holographic metasurfaces can be fabricated, their utility, and the novel phenomena that arise from them. In particular, it details a hologram retrieval algorithm for non-flat surface topologies, and how the topography determines the resultant symmetry properties of the holographic image. Furthermore, this thesis outlines a concept for replacing the bulky and complicated optics required for light sheet fluorescent microscopy with a simple holographic metasurface illuminated by a collimated beam. Two plasmonic meta-atom designs, both operating in reflection, are presented here, one for the visible wavelength range using nanorods and Pancharatnam-Berry phase-shifting, and the other for the millimetre wavelength range using c-rings. Extending the tools available for holography paves-the-way for advances in this field.
Sunday Morning Church, Put On A Dress
Creators: name: Moses, Emily
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 3602
subject: Creative and professional writing

description: This original memoir in essays examines the histories of belonging and of grief in the author’s life since she stopped believing in the God of her childhood and adolescence. The author confronts herself in each essay, refusing to allow the simplest answer to suffice when she asks the questions: Who am I, now? and, What does this mean? In this memoir, the author grapples with her identity as it relates to the lived experiences of surviving sexual assault, miscarrying a pregnancy, getting married at the age of twenty-two, and choosing to terminate a second pregnancy. This memoir is the author’s attempt to organize her experiences and her emotions into containers, literal and metaphorical, that will help her make sense of the realities of her past, present, and future.
The linear unicyclic hypergraph with the second or third largest spectral radius
Creators: name: Ding, Chao
name: Fan, Yi-Zheng
name: Wan, Jiang-Chao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C65, 15A18

description: The spectral radius of a uniform hypergraph is defined to be that of the adjacency tensor the hypergraph. It is known that the unique unicyclic hypergraph with the largest spectral radius is a nonlinear hypergraph, and the unique linear unicyclic hypergraph with the largest spectral radius is a power hypergraph. In this paper we determine the the unique linear unicyclic hypergraph with the second or third largest spectral radius, where the former hypergraph is a power hypergraph and the latter hypergraph is a non-power hypergraph.
title: Biomedicine & Healthcare Research, Vol. 3 No. Suppl.1 (2024): Supplement issue 1 : 2nd Scientific Day of the Cancer Radiotherapy Department, Farhet Hached University Hospital, Sousse, Tunisia
title: Supplement issue 1 : 2nd Scientific Day of the Cancer Radiotherapy Department, Farhet Hached University Hospital, Sousse, Tunisia
titleType: AlternativeTitle
Creators: name: Biomedicine & Healthcare Research
Publisher: name: Biomedicine & Healthcare Research
Year: 2024

description: Abstract report of the Second Scientific Day of the Cancer Radiotherapy Department, Farhet Hached University Hospital, Sousse, Tunisia
description: 2nd Scientific Day of the Cancer Radiotherapy Department, Farhet Hached University Hospital, Sousse, Tunisia...15
Material decomposition from a single x-ray projection via single-grid phase contrast imaging
Creators: name: Groenendijk, Celebrity F.
name: Schaff, Florian
name: Croton, Linda C. P.
name: Kitchen, Marcus J.
name: Morgan, Kaye S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This study describes a new approach for material decomposition in x-ray imaging, utilising phase contrast to both increase sensitivity to weakly-attenuating samples and to act as a complementary measurement to attenuation, therefore allowing two overlaid materials to be separated. The measurements are captured using the single-exposure, single-grid x-ray phase contrast imaging technique, with a novel correction that aims to remove propagation-based phase effects seen at sharp edges in the attenuation image. The use of a single-exposure technique means that images could be collected in a high-speed sequence. Results are shown for both a known two-material sample and for a biological specimen.
Growth activity during fingering in a porous Hele Shaw cell
Creators: name: Lovoll, Grunde
name: Meheust, Yves
name: Toussaint, Renaud
name: Schmittbuhl, Jean
name: Maloy, Knut Jorgen
Publisher: name: arXiv
Year: 2003
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present in this paper an experimental study of the invasion activity during unstable drainage in a 2D random porous medium, when the (wetting) displaced fluid has a high viscosity with respect to that of the (non-wetting) displacing fluid, and for a range of almost two decades in capillary numbers corresponding to the transition between capillary and viscous fingering. We show that the invasion process takes place in an active zone within a characteristic screening length from the tip of the most advanced finger. The invasion probability density is found to only depend on the distance to the latter tip, and to be independent of the value for the capillary number Ca. The mass density along the flow direction is related analytically to the invasion probability density, and the scaling with respect to the capillary number is consistent with a power law. Other quantities characteristic of the displacement process, such as the speed of the most advanced finger tip or the characteristic finger width, are also consistent with power laws of the capillary number. The link between the growth probability and the pressure field is studied analytically and an expression for the pressure in the defending fluid along the cluster is derived. The measured pressure are then compared with the corresponding simulated pressure field using this expression for the boundary condition on the cluster.
description: 11 pages 10 figures
Incremental Learning Algorithm for Sound Event Detection
Creators: name: Koh, Eunjeong
name: Saki, Fatemeh
name: Guo, Yinyi
name: Hung, Cheng-Yu
name: Visser, Erik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a new learning strategy for the Sound Event Detection (SED) system to tackle the issues of i) knowledge migration from a pre-trained model to a new target model and ii) learning new sound events without forgetting the previously learned ones without re-training from scratch. In order to migrate the previously learned knowledge from the source model to the target one, a neural adapter is employed on the top of the source model. The source model and the target model are merged via this neural adapter layer. The neural adapter layer facilitates the target model to learn new sound events with minimal training data and maintaining the performance of the previously learned sound events similar to the source model. Our extensive analysis on the DCASE16 and US-SED dataset reveals the effectiveness of the proposed method in transferring knowledge between source and target models without introducing any performance degradation on the previously learned sound events while obtaining a competitive detection performance on the newly learned sound events.
description: IEEE ICME 2020 Camera Ready Version
Models for dependent extremes using stable mixtures
Creators: name: Fougeres, Anne-Laure
name: Nolan, John
name: Rootzén, Holger
Publisher: name: Scandinavian Journal of Statistics
Year: 2023
Subjects: classificationCode: 49
subject: Mathematical sciences

description: This paper unifies and extends results on a class of multivariate Extreme Value (EV) models studied by Hougaard, Crowder, and Tawn. In these models both unconditional and conditional distributions are EV, and all lower-dimensional marginals and maxima belong to the class. This leads to substantial economies of understanding, analysis and prediction. One interpretation of the models is as size mixtures of EV distributions, where the mixing is by positive stable distributions. A second interpretation is as exponential-stable location mixtures (for Gumbel) or as power-stable scale mixtures (for non-Gumbel EV distributions). A third interpretation is through a Peaks over Thresholds model with a positive stable intensity. The mixing variables are used as a modeling tool and for better understanding and model checking. We study extreme value analogues of components of variance models, and new time series, spatial, and continuous parameter models for extreme values. The results are applied to data from a pitting corrosion investigation.
Models for dependent extremes using stable mixtures
Creators: name: Fougeres, Anne-Laure
name: Nolan, John
name: Rootzén, Holger
Publisher: name: American University
Year: 2023

description: This paper unifies and extends results on a class of multivariate Extreme Value (EV) models studied by Hougaard, Crowder, and Tawn. In these models both unconditional and conditional distributions are EV, and all lower-dimensional marginals and maxima belong to the class. This leads to substantial economies of understanding, analysis and prediction. One interpretation of the models is as size mixtures of EV distributions, where the mixing is by positive stable distributions. A second interpretation is as exponential-stable location mixtures (for Gumbel) or as power-stable scale mixtures (for non-Gumbel EV distributions). A third interpretation is through a Peaks over Thresholds model with a positive stable intensity. The mixing variables are used as a modeling tool and for better understanding and model checking. We study extreme value analogues of components of variance models, and new time series, spatial, and continuous parameter models for extreme values. The results are applied to data from a pitting corrosion investigation.
Multivariate elliptically contoured stable distributions : Theory and estimation
Creators: name: Nolan, John
Publisher: name: American University
Year: 2023

description: Stable distributions with elliptical contours are a class of distributions that are useful for modeling heavy tailed multivariate data. This paper describes the theory of such distributions, presents formulas for calculating their densities, and methods for fitting the data and assessing the fit. Efficient numerical routines are implemented and evaluated in simulations. Applications to data sets of a financial portfolio with 30 assets and to a bivariate radar clutter data set are presented.
Multivariate elliptically contoured stable distributions : Theory and estimation
Creators: name: Nolan, John
Publisher: name: Computational Statistics
Year: 2023
Subjects: classificationCode: 49
subject: Mathematical sciences

description: Stable distributions with elliptical contours are a class of distributions that are useful for modeling heavy tailed multivariate data. This paper describes the theory of such distributions, presents formulas for calculating their densities, and methods for fitting the data and assessing the fit. Efficient numerical routines are implemented and evaluated in simulations. Applications to data sets of a financial portfolio with 30 assets and to a bivariate radar clutter data set are presented.
Collision of particles near a three-dimensional rotating Hořava AdS black hole
Creators: name: Bécar, Ramón
name: González, P. A.
name: Vásquez, Yerko
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a three-dimensional rotating Hořava AdS black hole, that corresponds to a Lorentz-violating version of the BTZ black hole and we analyze the effect of the breaking of Lorentz invariance on the possibility that the black hole can acts as a particle accelerator by analyzing the energy in the center of mass (CM) frame of two colliding particles in the vicinity of its horizons. We find that the critical angular momentum of particles increases when the Hořava parameter $ξ$ increases and when the aether parameter $b$ increases. Also, the particles can collide on the inner horizon with arbitrarily high CM energy if one of the particles has a critical angular momentum being possible the BSW process, for the non-extremal rotating Hořava AdS black hole. Mainly, while that for the extremal BTZ black hole the particles with critical angular momentum only can exist on the degenerate horizon, for the Lorentz-violating version of the BTZ black hole the particle with critical angular momentum can exist in a region from the degenerate horizon.
description: 14 pages, and 10 figures. arXiv admin note: substantial text overlap with arXiv:1712.00868
Complete mitochondrial genome of Carijoa riisei (Duchassaing & Michelotti, 1860) (Octocorallia: Alcyonacea: Stolonifera: Clavulariidae)
Creators: name: Easton, Erin E.
name: Hicks, David
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: We report the first complete Stolonifera mitochondrial genome. Carijoa riisei (Duchassaing & Michelotti, 1860) isolate CLP2_A03 was collected by scuba at 32 m on the USTS Texas Clipper (27° 53.7827′N, 93° 36.2702′W). The complete mitogenome has the ancestral octocoral gene order for its 14 protein-coding genes, two rRNA genes, and one tRNA gene. It is 18,714 bp (30.7% A, 15.8% C, 18.8% G, and 34.7% T). Of the Alcyonacea mitogenomes published to date, it is most genetically similar (94% uncorrected) to Sinularia ceramensis Verseveldt, 1977 (NC_044122).
Euschistus longicornis Hildebrand & Grazia 1983
Creators: name: Carrenho, Renan
name: Rodrigues, Higor D. D.
name: Lima, Adriana Carneiro de
name: Schwertner, Cristiano F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Euschistus
Euschistus longicornis

description: Euschistus longicornis Hildebrand & Grazia, 1983
 Euschistus longicornis Hildebrand & Grazia, 1983: 82-84, figs. 1-10.
 Holotype: ♂, Brasil, Mato Grosso, Barra do Tapirapé, 16-26.I.1964, R. Malkins col.
description: Published as part of Carrenho, Renan, Rodrigues, Higor D. D., Lima, Adriana Carneiro de & Schwertner, Cristiano F., 2020, Type specimens of true bugs (Hemiptera: Heteroptera) housed in the Museu de Zoologia da Universidade de São Paulo, Brazil, pp. 1-16 in Papéis Avulsos de Zoologia 60 on page 13, DOI: 10.11606/1807-0205/2020.60.17, http://zenodo.org/record/4614885
Estimation of multiprocess survival models with cmp
Creators: name: Bartus, Tamás
name: Roodman, David
name: Bartus, Tamás
name: Roodman, David
Publisher: name: Unknown
Year: 2014
Subjects: subject: Research Methods/ Statistical Methods
subject: survival analysis
subject: multilevel analysis
subject: multilevel multiprocess hazard model
subject: simultaneous equations
subject: SUR estimation
subject: cmp

description: Multilevel multiprocess hazard models are routinely used by demographers to control for endogeneity and selection effects. These models consist of multilevel proportional hazards equations, and possibly probit equations, with correlated random effects. Although Stata currently lacks a specialized command for fitting systems of multilevel proportional hazards models, systems of seemingly unrelated lognormal survival models can be fit with the user-written cmp command (Roodman 2011, Stata Journal 11: 159–206). In this article, we describe multiprocess survival models and demonstrate theoretical and practical aspects of estimation. We also illustrate the application of the cmp command using examples related to demographic research. The examples use a dataset shipped with the statistical software aML.
Observation of a Transient Magnetization Plateau in a Quantum Antiferromagnet on the Kagome Lattice
Creators: name: Narumi, Y.
name: Katsumata, K.
name: Honda, Z.
name: Domenge, J. -C.
name: Sindzingre, P.
name: Lhuillier, C.
name: Shimaoka, Y.
name: Kobayashi, T. C.
name: Kindo, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetization process of an S=1/2 antiferromagnet on the kagome lattice, [Cu_3(titmb)_2(OCOCH_3)_6]H_2O {titmb= 1,3,5-tris(imidazol-1-ylmethyl)-2,4,6 trimethylbenzene} has been measured at very low temperatures in both pulsed and steady fields. We have found a new dynamical behavior in the magnetization process: a plateau at one third of the saturation magnetization appears in the pulsed field experiments for intermediate sweep rates of the magnetic field and disappears in the steady field experiments. A theoretical analysis using exact diagonalization yields J_1=-19K and J_2=6K, for the nearest neighbor and second nearest neighbor interactions, respectively. This set of exchange parameters explains the very low saturation field and the absence of the plateau in the thermodynamic equilibrium as well as the two-peak feature in the magnetic heat capacity. Supported by numerical results we argue that a dynamical order by disorder phenomenon could explain the transient appearance of the 1/3 plateau in pulsed field experiments.
description: 7 pages, 5 figures
Galedanta pulchra Grazia 1967
Creators: name: Carrenho, Renan
name: Rodrigues, Higor D. D.
name: Lima, Adriana Carneiro de
name: Schwertner, Cristiano F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Galedanta
Galedanta pulchra

description: Galedanta pulchra Grazia, 1967
 Galedanta pulchra Grazia, 1967: 49-51, figs. 1, 3, 7-9.
 Holotype: 1♂, pinned with genitalia in a microvial; Brasil, Paraná, Ponta Grossa, no date Camargo col.
 Remarks: According to the original description, the holoype is deposited at the Museu Rio-grandense de Ciências Naturais (MRCN) and was collected in XII.[19]38.
description: Published as part of Carrenho, Renan, Rodrigues, Higor D. D., Lima, Adriana Carneiro de & Schwertner, Cristiano F., 2020, Type specimens of true bugs (Hemiptera: Heteroptera) housed in the Museu de Zoologia da Universidade de São Paulo, Brazil, pp. 1-16 in Papéis Avulsos de Zoologia 60 on page 13, DOI: 10.11606/1807-0205/2020.60.17, http://zenodo.org/record/4614885
On Distributions of One Class of Random Sums and their Applications
Creators: name: Matsak, Ivan
name: Moklyachuk, Mikhail
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60E05, 60K25, 90B22

description: We propose results of the investigation of properties of the random sums of random variables. We consider the case, where the number of summands is the first moment of an event occurrence. An integral equation is presented that determines distributions of random sums. With the help of the obtained results we analyse the distribution function of the time during which the Geiger-Muller counter will not lose any particles, the distribution function of the busy period of a redundant system with renewal, and the distribution function of the sojourn times of a single-server queueing system.
Lincus anulatus Rolston 1983
Creators: name: Carrenho, Renan
name: Rodrigues, Higor D. D.
name: Lima, Adriana Carneiro de
name: Schwertner, Cristiano F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Lincus
Lincus anulatus

description: Lincus anulatus Rolston, 1983
 Lincus anulatus Rolston, 1983: 22-24, figs. 45-48.
 Paratypes: 1♀, pinned; Brasil, PA [Pará], S[an]ta. Isabel do Pará, 30.III.1962, J. Bechyné col. 1♂, pinned; [Brazil], Amapá, Igarapé Sucuriju, Série Navio, no date, Bicelli col. 1♂, pinned; Brasil, Amazonas, Benjamin Constant, 18-28. IX.1962, K. Lenko col.
description: Published as part of Carrenho, Renan, Rodrigues, Higor D. D., Lima, Adriana Carneiro de & Schwertner, Cristiano F., 2020, Type specimens of true bugs (Hemiptera: Heteroptera) housed in the Museu de Zoologia da Universidade de São Paulo, Brazil, pp. 1-16 in Papéis Avulsos de Zoologia 60 on page 13, DOI: 10.11606/1807-0205/2020.60.17, http://zenodo.org/record/4614885
Pallantia macunaima Grazia 1980
Creators: name: Carrenho, Renan
name: Rodrigues, Higor D. D.
name: Lima, Adriana Carneiro de
name: Schwertner, Cristiano F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Pallantia
Pallantia macunaima

description: Pallantia macunaima Grazia, 1980
 Pallantia macunaima Grazia, 1980: 26-27, figs. 28-36.
 Paratypes: 1♀, pinned; Brasil, Minas Gerais, Sete Lagoas, III.1963, F. Werner, U. Martins, L. Silva col. 1♀, pinned; [Brazil], MT [Mato Grosso], Três Lagoas, Água Tirada [stream], 15-30. V.[19]64, Exp[edição]. Dep[artamento]. Zool.[ogia].
description: Published as part of Carrenho, Renan, Rodrigues, Higor D. D., Lima, Adriana Carneiro de & Schwertner, Cristiano F., 2020, Type specimens of true bugs (Hemiptera: Heteroptera) housed in the Museu de Zoologia da Universidade de São Paulo, Brazil, pp. 1-16 in Papéis Avulsos de Zoologia 60 on page 14, DOI: 10.11606/1807-0205/2020.60.17, http://zenodo.org/record/4614885
Research on candidates for non-cosmological redshifts
Creators: name: Lopez-Corredoira, M.
name: Gutierrez, C. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged:) The paradox of apparent optical associations of galaxies with very different redshifts, the so-called anomalous redshift problem, is around 35 years old, but is still without a clear solution and is surprisingly ignored by most of the astronomical community. Statistical correlations among the positions of these galaxies have been pointed out by several authors. Gravitational lensing by dark matter has been proposed as the cause of these correlations, although this seems to be insufficient to explain them and does not work at all for correlations with the brightest and nearest galaxies. Some of these cases may be just fortuitous associations in which background objects are close in the sky to a foreground galaxy, although the statistical mean correlations remain to be explained and some lone objects have very small probabilities of being a projection of background objects. The sample of discordant redshift associations given in Arp's atlas is indeed quite large, and most of the objects remain to be analysed thoroughly. For about 5 years, we have been running a project to observe some of these cases in detail, and some new anomalies have been added to those already known; For instance, in some exotic configurations such as NGC 7603 or NEQ3, which can even show bridges connecting four object with very different redshifts. Not only QSOs but also emission-line galaxies in general are found to take part in this kind of event. Other cases are analyzed: MCG 7-25-46, GC 0248+430, B2 1637+29, VV172 and Stephan's Quintet.
description: 18 pages, to be published in the proceedings of the conference "Crisis in Cosmology I", 23 to 25 June 2005, Moncao (Portugal)
On heavy-light meson resonances and chiral symmetry
Creators: name: Kolomeitsev, E. E.
name: Lutz, M. F. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study heavy-light meson resonances with quantum numbers J^P=0^+ and J^P=1^+ in terms of the non-linear chiral SU(3) Lagrangian. At leading order a parameter-free prediction is obtained for the scattering of Goldstone bosons off heavy-light pseudo-scalar and vector mesons once we insist on approximate crossing symmetry of the unitarized scattering amplitude. The recently announced narrow open charm states observed by the BABAR and CLEO collaborations are reproduced. We suggest the existence of states that form an anti-triplet and a sextet representation of the SU(3) group. In particular, so far unobserved narrow isospin-singlet states with negative strangeness (I,S)=(0,-1) are predicted at 2361 MeV J^P=0^+ and 2501 MeV (J^P=1^+). Similarly, open bottom states are found at 5719 MeV (J^P=0^+) and 5622 MeV (J^P=1^+). Additional narrow states of mass 5580 MeV (J^P=0^+) and 5650 MeV (J^P=1^+) with widths of about 50 MeV are obtained in the (I,S)=(1,1) sector. For the anti-triplet states our results differ most significantly from predictions that are based on a linear realization of the chiral SU(3) symmetry in the open bottom sector. Strongly bound 0^+-and 1^+-states with (I,S)=(0,1) at 5507 MeV and 5553 MeV are predicted.
description: revised manuscript: improved discussion and minor corrections
Deeply Virtual Neutrino Scattering (DVNS)
Creators: name: Amore, Paolo
name: Coriano', Claudio
name: Guzzi, Marco
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce the study of neutrino scattering off protons in the deeply virtual kinematics, which describes under a unified formalism elastic and deep inelastic neutrino scattering. A real final state photon and a recoiling nucleon are detected in the few GeV ($|t|\sim 0.2-5$ GeV) region of momentum transfer. This is performed via an extension of the notion of deeply virtual Compton scattering, or DVCS, to the case of a neutral current exchange. The relevance of this process and of other similar exclusive processes for the study of neutrino interactions in neutrino factories for GeV neutrinos is pointed out.
description: 28 pages, 12 figures, revised final version, to appear in JHEP
Measurement of the Xi0 -> Lambda gamma Decay Asymmetry and Branching Fraction
Creators: name: Lai, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi0 -> Lambda gamma have been found with an estimated background of 58+-8 events. From these events the Xi0 -> Lambda gamma decay asymmetry has been determined to alpha(Xi0 -> Lambda gamma) = -0.78 +- 0.18_stat +- 0.06_syst, which is the first evidence of a decay asymmetry in Xi0 -> Lambda gamma. The branching fraction of the decay has been measured to be Br(Xi0 -> Lambda gamma) = (1.16 +- 0.05_stat +- 0.06_syst) x 10^-3.
description: 15 pages, 5 figures. Accepted for publication in Phys. Lett. B
Paralincus silvae Rolston 1983
Creators: name: Carrenho, Renan
name: Rodrigues, Higor D. D.
name: Lima, Adriana Carneiro de
name: Schwertner, Cristiano F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Paralincus
Paralincus silvae

description: Paralincus silvae Rolston, 1983
 Paralincus silvae Rolston, 1983: 185-187, figs. 2-5.
 Paratype: 1♂, pinned; [Brazil],Ter.[ritório do] Amapá. Rio Amapari 16. VI.[19]35, J. Lane col.
description: Published as part of Carrenho, Renan, Rodrigues, Higor D. D., Lima, Adriana Carneiro de & Schwertner, Cristiano F., 2020, Type specimens of true bugs (Hemiptera: Heteroptera) housed in the Museu de Zoologia da Universidade de São Paulo, Brazil, pp. 1-16 in Papéis Avulsos de Zoologia 60 on page 14, DOI: 10.11606/1807-0205/2020.60.17, http://zenodo.org/record/4614885