cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Suspension of the fiber mode-cleaner launcher and measurement of the high extinction-ratio (10^{-9}) ellipsometer for the Q & A experiment
Creators: name: Mei, Hsien-Hao
name: Chen, Sheng-Jui
name: Ni, Wei-Tou
Publisher: name: arXiv
Year: 2005
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Q & A experiment, first proposed and started in 1994, provides a feasible way of exploring the quantum vacuum through the detection of vacuum birefringence effect generated by QED loop diagram and the detection of the polarization rotation effect generated by photon-interacting (pseudo-)scalar particles. Three main parts of the experiment are: (1) Optics System (including associated Electronic System) based on a suspended 3.5-m high finesse Fabry-Perot cavity, (2) Ellipsometer using ultra-high extinction-ratio polarizer and analyzer, and (3) Magnetic Field Modulation System for generating the birefringence and the polarization rotation effect. In 2002, the Q & A experiment achieved the Phase I sensitivity goal. During Phase II, we set (i) to improve the control system of the cavity mirrors for suppressing the relative motion noise, (ii) to enhance the birefringence signal by setting-up a 60-cm long 2.3 T transverse permanent magnet rotatable to 10 rev/s, (iii) to reduce geometrical noise by inserting a polarization-maintaining optical fiber (PM fiber) as a mode cleaner, and (iv) to use ultra-high extinction-ratio (10^{-9}) polarizer and analyzer for ellipsometry. Here we report on (iii) & (iv); specifically, we present the properties of the PM-fiber mode-cleaner, the transfer function of its suspension system, and the result of our measurement of high extinction-ratio polarizer and analyzer.
description: 8 pages, 6 figures, presented in the 6th Edoardo Amaldi Conference on Gravitational Waves, Okinawa, Japan, June 2005, and accepted by "Journal of Physics: Conference Series". Modifications from version 2 were made based on the referees' comments on figures. Ref. [31] were updated
A Bayesian approach to the follow-up of candidate gravitational wave signals
Creators: name: Veitch, John
name: Vecchio, Alberto
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Ground-based gravitational wave laser interferometers (LIGO, GEO-600, Virgo and Tama-300) have now reached high sensitivity and duty cycle. We present a Bayesian evidence-based approach to the search for gravitational waves, in particular aimed at the followup of candidate events generated by the analysis pipeline. We introduce and demonstrate an efficient method to compute the evidence and odds ratio between different models, and illustrate this approach using the specific case of the gravitational wave signal generated during the inspiral phase of binary systems, modelled at the leading quadrupole Newtonian order, in synthetic noise. We show that the method is effective in detecting signals at the detection threshold and it is robust against (some types of) instrumental artefacts. The computational efficiency of this method makes it scalable to the analysis of all the triggers generated by the analysis pipelines to search for coalescing binaries in surveys with ground-based interferometers, and to a whole variety of signal waveforms, characterised by a larger number of parameters.
description: 9 pages
Towards a Robust and Trustworthy Machine Learning System Development: An Engineering Perspective
Creators: name: Xiong, Pulei
name: Buffett, Scott
name: Iqbal, Shahrear
name: Lamontagne, Philippe
name: Mamun, Mohammad
name: Molyneaux, Heather
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: While Machine Learning (ML) technologies are widely adopted in many mission critical fields to support intelligent decision-making, concerns remain about system resilience against ML-specific security attacks and privacy breaches as well as the trust that users have in these systems. In this article, we present our recent systematic and comprehensive survey on the state-of-the-art ML robustness and trustworthiness from a security engineering perspective, focusing on the problems in system threat analysis, design and evaluation faced in developing practical machine learning applications, in terms of robustness and user trust. Accordingly, we organize the presentation of this survey intended to facilitate the convey of the body of knowledge from this angle. We then describe a metamodel we created that represents the body of knowledge in a standard and visualized way. We further illustrate how to leverage the metamodel to guide a systematic threat analysis and security design process which extends and scales up the classic process. Finally, we propose the future research directions motivated by our findings. Our work differs itself from the existing surveys by (i) exploring the fundamental principles and best practices to support robust and trustworthy ML system development, and (ii) studying the interplay of robustness and user trust in the context of ML systems. We expect this survey provides a big picture for machine learning security practitioners.
description: 20 pages (58 pages pre-print), 6 figures
Confined Electrons in Effective Plane Fractals
Creators: name: Yang, Xiaotian
name: Zhou, Weiqing
name: Zhao, Peiliang
name: Yuan, Shengjun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: As an emerging complex two-dimensional structure, plane fractal has attracted much attention due to its novel dimension-related physical properties. In this paper, we check the feasibility to create an effective Sierpinski carpet (SC), a plane fractal with Hausdorff dimension intermediate between one and two, by applying an external electric field to a square or a honeycomb lattice. The electric field forms a fractal geometry but the atomic structure of the underlying lattice remains the same. By calculating and comparing various electronic properties, we find parts of the electrons can be confined effectively in a fractional dimension with a relatively small field, and representing properties very close to these in a real fractal. In particular, compared to the square lattice, the external field required to effectively confine the electron is smaller in the hexagonal lattice, suggesting that a graphene-like system will be an ideal platform to construct an effective SC experimentally. Our work paves a new way to build fractals from a top-down perspective, and can motivate more studies of fractional dimensions in real systems.
Le marronnage rhétorique d’Édouard Glissant ou l’abolition des frontières génériques artistiques dans son œuvre romanesque
Creators: name: Rhimi, Mohamed Lamine
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

The present article seeks to analyse Edouard Glissant’s intellectual marronage, which is closely linked to his rebellious rhetoric, by which the Martinican writer tries to use a patent suit to tackle imperialist systems, which cultivate monolithic and unidirectional western rhetoric. For this reason, he transcends generic boundaries by abolishing the artistic and cultural barriers. In this perspective, he needs to experience his new dynamics of trans-rhetorical, which is based on the implementation of the intermixing between oratorical genres (judicial impetus, epidictic eloquence and deliberative aim) in his novels. Correlatively, the West Indian novelist, ethnographer and philosopher makes use of his trans-generic aesthetics, which is coextensive with the trans-rhetorical, in order to incorporate not only historiography, ethnography, poetry and theatre in his romantic fiction, but also music, painting, sculpture and arts of photography and filmmaking. This is how he places his new geopoetics under the label of intermixing between different human imaginations.

description: Il Tolomeo
Fluctuations of anisotropic flow from the finite number of rescatterings in a two-dimensional massless transport model
Creators: name: Roch, Hendrik
name: Borghini, Nicolas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the fluctuations of anisotropic transverse flow due to the finite number of scatterings in a two-dimensional system of massless particles. Using a set of initial geometries from a Monte Carlo Glauber model, we study how flow coefficients fluctuate about their mean value at the corresponding eccentricity, for several values of the scattering cross section. We also show how the distributions of the second and third event planes of anisotropic flow about the corresponding participant plane in the initial geometry evolve as a function of the mean number of scatterings in the system.
description: v2: final version, 17 pages, 12 figures
THE METHYLOME OF YERSINIA PESTIS
Creators: name: Hnath, Jonathan
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Methylation
subject: Methylome
subject: Yersinia pestis

description: During the normal cycle of transfer between its vector (the flea) and a mammalian host, Yersinia pestis (Y. pestis) is exposed to significantly different environmental conditions.  Studies have shown gene expression patterns in Y. pestis differ significantly under these separate conditions.  In many bacteria, large-scale gene expression changes are modulated by DNA methylation.  To date, methylation patterns of the Y. pestis genome have not been examined.  In this study, the methylome of Y. pestis was characterized and whether a change in methylation accounts for change in gene expression was determined.

The methylation pattern of the Y. pestis genome, having been characterized, provides a reference methylome.  A comparison of the methylation state at different temperatures selected to represent vector and host conditions, showed no significant change in methylation pattern.  It is concluded from this study that the methylation pattern of the Y. pestis genome is not altered according to the temperature of its vector or mammalian host.
Asymptotic flatness and Hawking quasilocal mass
Creators: name: Faraoni, Valerio
name: Giusti, Andrea
name: Bean, Tyler F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 83C57, 83C40

description: We point out an association between anomalies in the Hawking quasilocal mass (or, in spherical symmetry, in its better known version, the Misner-Sharp-Hernandez mass) and unphysical properties of the spacetime geometry. While anomalous behaviors show up in certain quantum-corrected black holes, they are not unique to this context and signal serious physical pathologies of isolated gravitating systems in general.
description: 8 pages, no figures
La traduction comme paradigme de la communication interculturelle
Creators: name: Puccini, Paola
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

Marco Micone is among the most important French-speaking writers in Quebec. Through his works, he gave an important reflection on literature as a means of mediation and expression of intercultural communication. He also translated some classics of Italian literature. In our work, we intend to investigate how much the translation of Carlo Goldoni’s La Locandiera can become a paradigm through which to investigate the characteristics of intercultural communication. His Locandiera can be defined as a migrant translation, in the sense that, through it, its author expresses the complex approach to diversity and inclusion.

description: Il Tolomeo
Contact-inhibited chemotaxis in de novo and sprouting blood-vessel growth
Creators: name: Merks, Roeland M. H.
name: Perryn, Erica D.
name: Shirinifard, Abbas
name: Glazier, James A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences

description: Blood vessels form either when dispersed endothelial cells (the cells lining the inner walls of fully-formed blood vessels) organize into a vessel network (vasculogenesis), or by sprouting or splitting of existing blood vessels (angiogenesis). Although they are closely related biologically, no current model explains both phenomena with a single biophysical mechanism. Most computational models describe sprouting at the level of the blood vessel, ignoring how cell behavior drives branch splitting during sprouting. We present a cell-based, Glazier-Graner-Hogeweg-model simulation of the initial patterning before the vascular cords form lumens, based on plausible behaviors of endothelial cells. The endothelial cells secrete a chemoattractant, which attracts other endothelial cells. As in the classic Keller-Segel model, chemotaxis by itself causes cells to aggregate into isolated clusters. However, including experimentally-observed adhesion-driven contact inhibition of chemotaxis in the simulation causes randomly-distributed cells to organize into networks and cell aggregates to sprout, reproducing aspects of both de novo and sprouting blood-vessel growth. We discuss two branching instabilities responsible for our results. Cells at the surfaces of cell clusters attempting to migrate to the centers of the clusters produce a buckling instability. In a model variant that eliminates the surface-normal force, a dissipative mechanism drives sprouting, with the secreted chemical acting both as a chemoattractant and as an inhibitor of pseudopod extension. The branching instabilities responsible for our results, which result from contact inhibition of chemotaxis, are both generic developmental mechanisms and interesting examples of unusual patterning instabilities.
description: Thoroughly revised version, now in press in PLoS Computational Biology. 53 pages, 13 figures, 2 supporting figures, 56 supporting movies, source code and parameters files for computer simulations provided. Supporting information: http://www.psb.ugent.be/~romer/ploscompbiol/ Source code: http://sourceforge.net/projects/tst/
A hard metallic material: Osmium Diboride
Creators: name: Chen, Z. Y.
name: Xiang, H. J.
name: Yang, Jinlong
name: Hou, J. G.
name: Zhu, Qingshi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We calculate the structural and electronic properties of OsB2 using density functional theory with or without taking into account spin-orbit (SO) interaction. Our results show that the bulk modulus with and without SO interaction are 364 and 365 Gpa respectively, both are in good agreement with experiment (365-395 Gpa). The evidence of covalent bonding of Os-B, which plays an important role to form a hard material, is indicated both in charge density, atoms in molecules analysis, and density of states analysis. The good metallicity and hardness of OsB2 might suggest its potential application as hard conductors.
description: Figures improved
Yallah Bye ou le rêve d’un adieu à la guerre
Creators: name: Badr, Maha
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

Yallah Bye, an album published by Lombard (2015), illustrates two wars marking the contemporary history of Lebanon: the civil war (1975-1990) and the war between Israel and Hezbollah (August 2006). There is an intersection between two visions: that of a Lebanese screenwriter who tells a universal autobiographical story and that of a Korean illustrator who is committed to create an authentic figurative narration. The aim of the article is to show how this medium constitutes a documentary source within the framework of a cultural and social history. By exposing the repercussions of the 2006 war, images and text reveal, via humour and denial, a dream of peace despite the current turmoil and the obsession with a past that keeps repeating itself.

description: Il Tolomeo
title: Assessment of probabilistic distributed factors influencing renewable energy supply for hotels using Monte-Carlo methods
Creators: name: Meschede, Henning
name: Dunkelberg, Heiko
name: Stöhr, Fabian
name: Peesel, Ron-Hendrik
name: Hesselbach, Jens
Publisher: name: Universität Kassel
Year: 2017
Subjects: subject: renewable energy systems
subject: Monte Carlo methods
subject: hotels
subject: Canary Island
subject: 333
subject: Kanarische Inseln
subject: Erneuerbare Energien
subject: Monte-Carlo-Simulation
subject: Hotel
subject: Energieverbrauch

description: This is a revised manuscript of the article "Assessment of probabilistic distributed factors influencing renewable energy supply for hotels using Monte-Carlo methods". The final authenticated version is available online at: https://doi.org/10.1016/j.energy.2017.03.166
The solutions of Dirac equation on the hyperboloid under perpendicular magnetic fields
Creators: name: Kızılırmak, D. Demir
name: Kuru, Ş.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this study, firstly it is reviewed how the solutions of the Dirac-Weyl equation for a massless charge on the hyperboloid under perpendicular magnetic fields are obtained by using supersymmetric (SUSY) quantum mechanics methods. Then, the solutions of the Dirac equation for a massive charge under magnetic fields have been computed in terms of the solutions which were found before for the Dirac-Weyl equation. As an example, the case of a constant magnetic field on the hyperbolic surface for massless and massive charges has been worked out.
description: 9 pages, 2 figures
title: Weighing Vehicles in Motion
title: [1969]
titleType: Subtitle
Creators: name: University Of Kentucky Research Foundation
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1969
Subjects: subject: Transportation Engineering

description: An agreement between the Kentucky Department of Highways and the University of Kentucky Research Foundation, dated March 15, 1969, extended and continued research on Weighing Vehicles in Motion. The agreement contained these objectives of the continuing research:  "The services provided by the FOUNDATION shall be within the scope of the objectives outlined in the original proposal and made a part of the original contract (Research Project KYHPR-61-27, Development of an Electronic Means of Weighing Vehicles in Motion, a part of the DEPARTMENT'S Work Program, HPR-1, Part II). The research shall consist of, but not limited to, the following:  A. Furnishing technical assistance as needed to effectuate the installation of the scale platform and its accessories at the chosen site and in accordance with plans contained in the FOUNDATION'S annual report of "Weighing Vehicles in Motion," Submitted to the DEPARTMENT, September 30, 1965. Any revisions or modifications arising shall be subject to the concurrence of the DEPARTMENT. The research staff shall record all pertinent details of the installation and submit a descriptive report subsequently.  B. Procuring, assembling, testing, and installing the recording system recommended in the annual report (op. cit.) and in attachment No. 1, "Proposed Budget," which is appended hereto.  C. Developing and testing a data-analysis program satisfying the modular input requirements of available digital computers and the desired format of "output".  Changes in the area or topics designated for study were permitted, based on consultation and approval by the parties to the agreement. In addition, the Department reserved the right to revise the scope of the research.  The Department of Civil Engineering, University of Kentucky, was chosen to conduct the research under the direction of David K. Blythe. His staff designed, constructed, and installed the broken-bridge scale platform at the preselected site on I-64-75, and purchased an electronic data-collection system for installation at the site. Since July 1, 1968, the project has continued under the direction of Russell E. Puckett, Associate Director, Office of Research and Engineering Services, College of Engineering.  In accordance with the provisions of the agreement, the data-collection system was selected for its ability to detect individual axles of moving vehicles and to record data in digital format on magnetic tape. The system was designed to convert both the analog signal representing axle weight and a signal representing real time to a digital form that would be compatible with available digital computer equipment at the University of Kentucky.  The separate objectives of the research have been completed. This report includes sections devoted to each of the objectives, and is submitted for approval and acceptance as the final report of this contract agreement.
Construction et déconstruction de la masculinité hégémonique dans L’Arabe du futur 1: Une jeunesse au Moyen-Orient (1978-1984) de Riad Sattouf
Creators: name: Lo Nigro, Giorgia
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

Through the analysis of the graphic novel L’Arabe du future 1. Une jeunesse au Moyen-Orient (1978-1985) by the Franco-Syrian cartoonist Riad Sattouf, this contribution aims to investigate the construction of hegemonic masculinity in Gaddafi’s post-colonial Libya and Hafez al Assad’s Syria. First, this study intends to track the stages of Riad’s journey towards the achievement of hegemonic masculinity. In this context, a special focus will be laid on the construction of the mother’s character through that of the father, thereby showing how the female character takes shape from the male perspective. Second and finally, it attempts to analyse how the author implements a deconstruction path of hegemonic masculinity by using certain rhetorical devices, namely irony, stereotype repetition and the adoption of his own perspective as a child.

description: Il Tolomeo
Poisson-Bracket Approach to the Dynamics of Nematic Liquid Crystals. The Role of Spin Angular Momentum
Creators: name: Stark, H.
name: Lubensky, T. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Nematic liquid crystals are well modeled as a fluid of rigid rods. Starting from this model, we use a Poisson-bracket formalism to derive the equations governing the dynamics of nematic liquid crystals. We treat the spin angular momentum density arising from the rotation of constituent molecules about their centers of mass as an independent field and derive equations for it, the mass density, the momentum density, and the nematic director. Our equations reduce to the original Leslie-Ericksen equations, including the inertial director term that is neglected in the hydrodynamic limit, only when the moment of inertia for angular momentum parallel to the director vanishes and when a dissipative coefficient favoring locking of the angular frequencies of director rotation and spin angular momentum diverges. Our equations reduce to the equations of nematohydrodynamics in the hydrodynamic limit but with dissipative coefficients that depend on the coefficient that must diverge to produce the Leslie-Ericksen equations.
description: 10 pages, to be published in Phys. Rev. E 72(5)
Signals of the QCD axion with mass of 17 MeV/c^2: nuclear transitions and light meson decays
Creators: name: Alves, Daniele S. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The QCD axion remains experimentally viable in the mass range of O(10 MeV) if (i) it couples predominantly to the first generation of SM fermions; (ii) it decays to $e^+ e^-$ with a short lifetime $τ_a\lesssim 10^{-13}\,$s; and (iii) it has suppressed isovector couplings, i.e., if it is piophobic. Remarkably, these are precisely the properties required to explain recently observed anomalies in nuclear de-excitations, to wit: the $e^+e^-$ emission spectra of isoscalar magnetic transitions of $^{8\!}$Be and $^{4\!}$He nuclei showed a "bump-like" feature peaked at $m_{e^+e^-}\sim 17$ MeV. In this article, we argue that on-shell emission of the QCD axion (with the aforementioned properties) provides an extremely well-motivated, compatible explanation for the observed excesses in these nuclear de-excitations. The absence of anomalous features in other measured transitions is also naturally explained: piophobic axion emission is strongly suppressed in isovector magnetic transitions, and forbidden in electric transitions. This QCD axion hypothesis is further corroborated by an independent observation: a $2-3\,σ$ deviation in the measurement of $Γ(π^0\to e^+e^-)$ from the Standard Model theoretical expectation. This article also includes detailed estimations of various axionic signatures in rare light meson decays, which take into account contributions from low-lying QCD resonance exchange, and, in the case of rare Kaon decays, the possible effective implementations of $ΔS=1$ octet enhancement in chiral perturbation theory. These inherent uncertainties of the effective description of the strong interactions at low energies result in large variations in the predictions for hadronic signals of the QCD axion; in spite of this, the estimated ranges for rare meson decay rates obtained here can be probed in the near future in $η/η^\prime$ and Kaon factories.
description: V3: Two-column layout; 27 pages (22 pages + references); 5 figures. Revised NA64's upper bound on the axion lifetime, and added note commenting on this issue. Apart from this, V3 matches the content of the published version in PRD
Artificial Immune Systems (AIS) - A New Paradigm for Heuristic Decision Making
Creators: name: Aickelin, Uwe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Over the last few years, more and more heuristic decision making techniques have been inspired by nature, e.g. evolutionary algorithms, ant colony optimisation and simulated annealing. More recently, a novel computational intelligence technique inspired by immunology has emerged, called Artificial Immune Systems (AIS). This immune system inspired technique has already been useful in solving some computational problems. In this keynote, we will very briefly describe the immune system metaphors that are relevant to AIS. We will then give some illustrative real-world problems suitable for AIS use and show a step-by-step algorithm walkthrough. A comparison of AIS to other well-known algorithms and areas for future work will round this keynote off. It should be noted that as AIS is still a young and evolving field, there is not yet a fixed algorithm template and hence actual implementations might differ somewhat from the examples given here.
Traitement du plurilectalisme dans Camp de Thiaroye et Campo Thiaroye d’Ousmane Sembène: entre omission et adaptation
Creators: name: Schiavone, Cristina
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

The focus of the present study is the comparison between the feature film Camp de Thiaroye (1987) and its Italian version (IV) (1988), from the point of view of a phenomenon treated in the screenplay: plurilingualism and linguistic variations. Comparison of the dialogues of the original version (OV) and the IV shows the omission of some languages in the OV, subtitled in the IV instead. Also, the ‘français tiralleur’ speech was well adapted in the IV, suggesting a better adherence of the IV to the political-aesthetic programme of Sembène.

description: Il Tolomeo
Unconventional cosmology on the (thick) brane
Creators: name: Navarro, Ignacio
name: Santiago, Jose
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the cosmology of a thick codimension 1 brane. We obtain the matching conditions leading to the cosmological evolution equations and show that when one includes matter with a pressure component along the extra dimension in the brane energy-momentum tensor, the cosmology is of non-standard type. In particular one can get acceleration when a dust of non-relativistic matter particles is the only source for the (modified) Friedman equation. Our equations would seem to violate the conservation of energy-momentum from a 4D perspective, but in 5D the energy-momentum is conserved. One could write down an effective conserved 4D energy-momentum tensor attaching a ``dark energy'' component to the energy-momentum tensor of matter that has pressure along the extra dimension. This extra component could, on a cosmological scale, be interpreted as matter-coupled quintessence. We comment on the effective 4D description of this effect in terms of the time evolution of a scalar field (the 5D radion) coupled to this kind of matter.
description: 9 pages, v2. eq.(17) corrected, comments on effective theory changed
Solutions of Heun's general equation and elliptic Darboux equation
Creators: name: Figueiredo, Bartolomeu D. B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: New solutions for the elliptic Darboux equation are obtained as particular cases of solutions constructed for Heun's general equation. We consider two groups of power series expansions and two new groups of expansions in series of Gauss hypergeometric functions. The convergence of one group in power series is determined by means of ratio tests for infinite series, while the other groups are designed to solve problems which admit finite-series solutions. Actually, we envisage periodic quasi-exactly solvable potentials for which the stationary one-dimensional Schrödinger equation is reduced to the Darboux equation. In general, finite- and infinite-series solutions are obtained from power series expansions for Heun's equation. However, we show that the Schrödinger equation admits additional finite-series expansions in terms of hypergeometric functions for a family of associated Lamé potentials used in band theory of solids. For each finite-series solution we find as well four infinite-series expansions which are bounded and convergent for all values of the independent variable. Finally we find that it is possible to use transformations of variables in order to generate new solutions for the Darboux equation out of other expansions in series of hypergeometric functions for the Heun equation.
description: We have corrected relations (89) and (99). As a consequence we have rewritten Sections 5.3 and 5.4
Stringy Kähler Moduli for the Pfaffian-Grassmannian Correspondence
Creators: name: Donovan, Will
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 14F08, Secondary 14J32, 14M15, 18G80, 81T30

description: The Pfaffian-Grassmannian correspondence relates certain pairs of derived equivalent non-birational Calabi-Yau 3-folds. Given such a pair, I construct a set of derived equivalences corresponding to mutations of an exceptional collection on the relevant Grassmannian, and give a mirror symmetry interpretation, following a physical analysis of Eager, Hori, Knapp, and Romo.
A Note on the Theory of Price Determination in the Australian Beef Market
Creators: name: Reeves, G.W.
name: Longmire, James L.
name: Reeves, G.W.
name: Longmire, James L.
Publisher: name: Unknown
Year: 1982
Subjects: Demand and Price Analysis
Livestock Production/Industries

description: The view is taken that institutional factors operating in the international beef market limit the usefulness of a competitive spatial equilibrium model for understanding the process of price formation in the Australian beef market. A simple theoretical model is developed to demonstrate the impact of the U.S. beef quota and Australia's meat export control scheme on Australian beef prices. It is argued that Australian beef prices are related to the weighted average of export prices rather than any "world" price. Implications for the direction and volume of Australia's beef exports are discussed.
The true redshift distribution of Pre-SWIFT gamma-ray bursts
Creators: name: Gendre, B.
name: Boer, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: SWIFT bursts appear to be more distant than previous bursts. We present the Boer & Gendre relation that link redshift and afterglow luminosities. Taking advantage of the XMM-Newton, Chandra and BeppoSAX catalogs, and using this relation, we have investigated the redshift distribution of GRBs. We find that XMM burst sources with unknown redshift appear to be more distant than those with a known redshift. We propose that this effect may be due to a selection effect of pre-SWIFT optical observations.
description: Proceedings of the "Gamma Ray Bursts in the Swift Era" conference, 6 pages, 5 color figures
Evaporation from a Canadian west coast douglas-fir forest : seasonal patterns and controls
Creators: name: Humphreys, Elyn Robin
Publisher: name: University of British Columbia
Year: 2009

description: In order to understand how forest functioning will respond to global climate change, longterm and direct measurements of water vapour and energy exchange over forested ecosystems are needed. Between October 15, 1997 and May 31, 1999, eddy covariance measurements of latent and sensible heat flux were made above a 50-year-old, 33-m tall Douglas-fir forest, part of the seasonal temperate rainforest located on Vancouver Island, B.C, on the west coast of Canada. Winters at this site are wet and mild while summers are warm and dry. Evaporation rates and energy exchange varied widely on annual, seasonal and diurnal time scales and were used to discern the processes involved in the evaporation of water from this forest canopy. Ultimately, these variations were integrally linked to the canopy wetness and the surface conductance. Spectral analysis and turbulence characteristics were used to ensure measurement quality during inclement weather. The Gill Model 1012R2A sonic anemometer-thermometer used in this study performed well up to rainfall intensities of 4.6 mm h⁻¹. However, signal attenuation of the water vapour mixing ratio was observed during high humidity conditions due to water vapour adsorption/desorption effects on the sampling tube walls leading to the infrared gas analyzer. Total latent heat flux losses of up to 38% could be corrected using the sensible heat cospectra. Significant evaporation rates occurred during the winter months at this site. The wet canopy acted as a sink for energy characterized by downward fluxes of sensible heat supporting evaporation of intercepted rainfall. Latent heat fluxes often exceeded available energy and equilibrium evaporation rates on a half hour basis throughout the day and night. Wet canopy evaporation required turbulent conditions and only a small non-zero saturation deficit. Evaporation occurring between April and September, inclusively, accounted for 74% of the total annual evaporation of 402 mm for 1998. Summer evaporation rates were on average 1.57 mm day⁻¹ with a maximum of 3.56 mm day⁻¹. Sensible heat flux dominated energy exchange throughout the summer with β values ranging from 1.3 to 3.5. Uncorrected midday Priestly-Taylor α values ranged from 0.20 to 0.55. Physiological control was important in limiting dry canopy evaporation or transpiration rates. Mean daytime canopy conductance was generally less than 6 mm s⁻¹ and was closely related to saturation deficit, soil water potential, and photosynthetic photon flux density. However, canopy conductance was found to have a weak negative linear relationship with transpiration rates only during late morning hours.
Women’s Issues: African Writers Fighting Portuguese Colonialism in the 1950s
Creators: name: Alfieri, Noemi
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

This essay approaches the literary production by female intellectuals who opposed Portuguese colonialism in Africa, recognising their active role in history, as well as the cultural and political processes that influenced their writing and its repercussions. Experiencing multiple forms of subalternity – of class, race and gender – women like Alda Espírito Santo, Alda Lara, Noémia de Sousa Deolinda Rodrigues and Manuela Margarido were committed to the creation of new ways of writing and forms of conceiving the world. Playing a fundamental role in the literary, political and cultural environment of the second half of the 20th century, they circulated in spaces in which they questioned male hegemony, discussing gender issues and exercising multiple forms of resistance. This article will consider how the demands of women in the process of political decolonisation have often been reduced to the label of ‘women’s issues’, the idea of unification of struggles having been privileged instead.

description: Il Tolomeo
Cosmological simulation in tides: power spectra and halo shape responses, and shape assembly bias
Creators: name: Akitsu, Kazuyuki
name: Li, Yin
name: Okumura, Teppei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The well-developed separate universe technique enables accurate calibration of the response of any observable to an isotropic long-wavelength density fluctuation. The large-scale environment also hosts tidal modes that perturb all observables anisotropically. As in the separate universe, both the long tidal and density modes can be absorbed by an effective anisotropic background, on which the interaction and evolution of the short modes change accordingly. We further develop the tidal simulation method, including proper corrections to the second order Lagrangian perturbation theory (2LPT) to generate initial conditions of the simulations. We measure the linear tidal responses of the matter power spectrum, at high redshift from our modified 2LPT, and at low redshift from the tidal simulations. Our results agree qualitatively with previous works, but exhibit quantitative differences in both cases. We also measure the linear tidal response of the halo shapes, or the shape bias, and find its universal relation with the linear halo bias, for which we provide a fitting formula. Furthermore, analogous to the assembly bias, we study the secondary dependence of the shape bias, and discover for the first time dependence on halo concentration and axis ratio. Our results provide useful insights for studies of the intrinsic alignment as source of either contamination or information. These effects need to be correctly taken into account when one uses intrinsic alignments of galaxy shapes as a precision cosmological tool.
description: 33 pages, 16 figures. Comments are welcome; v2: corrected typos and updated figures; v3 minor corrections, added references, matches version published in JCAP
Population Change and Retail Sales Patterns in Local Authority Areas of Queensland
Creators: name: Hamilton, Joel R.
name: Hamilton, Joel R.
Publisher: name: Unknown
Year: 1982
Subjects: Consumer/Household Economics

description: Census data from Queensland were used to test whether or not the relationships between population and retail trade patterns derived from central place theory were applicable at the local authority level. Larger local authorities achieve higher per capita retail sales than less populous places. Proximity to larger centres reduces per capita sales. Population growth allows a local authority to capture a higher proportion of spending locally, while decline encourages and even forces people to shop elsewhere. There is a general tendency toward fewer retail firms, presumably due to technological changes in retailing, but the rate of loss is related to population change. Only places with moderate population growth show increases in firm numbers. Changes in retail sales per firm are also directly related to population change.
Die theologischen Gespräche zwischen der Evangelischen Kirche in Deutschland und der Orthodoxie
Creators: name: Basdekis, Athanasios
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 27 Nr. 2 (1978): Ökumenische Rundschau, Band 27, Heft 2
Direct observation of Fe spin reorientation in single crystalline YbFe6Ge6
Creators: name: Avila, M. A.
name: Takabatake, T.
name: Takahashi, Y.
name: Bud'ko, S. L.
name: Canfield, P. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have grown single crystals of YbFe6Ge6 and LuFe6Ge6 and characterized their anisotropic behaviour through low field magnetic susceptibility, field-dependent magnetization, resistivity and heat capacity measurements. The Yb+3 valency is confirmed by LIII XANES measurements. YbFe6Ge6 crystals exhibit a field-dependent, sudden reorientation of the Fe spins at about 63 K, a unique effect in the RFe6Ge6 family (R = rare earths) where the Fe ions order anti-ferromagnetically with Neel temperatures above 450 K and the R ions' magnetism appears to behave independently. The possible origins of this unusual behaviour of the ordered Fe moments in this compound are discussed.
description: 12 pages, 8 figures, accepted in J. Phys.: Cond. Matter
A Dynamic Nutrient Carryover Model for Pastoral Soils and its Application to Optimising Fertiliser Allocation to Several Blocks with a Cost Constraint
Creators: name: Woodward, Simon J.R.
name: Woodward, Simon J.R.
Publisher: name: Unknown
Year: 1996
Subjects: Crop Production/Industries

description: A dynamical model of soil phosphorus carryover in grazed pasture provides the basis for bioeconomic optimization of fertiliser rates. A linear constraint is introduced to optimise the allocation of limited funds to fertiliser on several farm blocks, each of which represents a different land and/or stock class. The optimal constrained maintenance application of fertiliser to each block is calculated, and an heuristic approach to this equilibrium is suggested. In some cases this involves withholding of fertiliser from unresponsive blocks. The dynamical model and economic optimisation method have been implemented in a commercial fertiliser planning decision support tool Outlook.
Risk Management Strategies in New Zealand Agriculture and Horticulture
Creators: name: Martin, Sandra
name: Martin, Sandra
Publisher: name: Unknown
Year: 1996
Subjects: Risk and Uncertainty

description: This study strengthens the empirical basis for risk analysis by identifying the importance which producers attach to different risk management strategies in New Zealand's deregulated farming environment. A nationwide survey covering eight farm types was conducted. As range of production, marketing and financial strategies used by farmers and growers were identified. Some strategies appear to be favoured by farmers and growers in all industries, others seem to be industry specific, and some are universally unpopular. The mix of strategies employed seems to vary by farm type. Possible reasons for variation are identified.
Excitation of Nuclear Collective States by Heavy Ions within the Model of Semi-Microscopic Optical Potential
Creators: name: Hanna, K. M.
name: Lukyanov, K. V.
name: Lukyanov, V. K.
name: Metawei, Z.
name: Slowinski, B.
name: Zemlyanaya, E. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The (semi-)microscopic double-folding nucleus-nucleus optical potentials are suggested for consideration of inelastic scattering with excitation of collective nuclear states by using the adiabatic approach and the elastic scattering amplitude in the high-energy approximation. The analytical expression for inelastic scattering amplitude is obtained keeping the first order terms in the deformation parameter of a potential. Calculations of inelastic cross sections for the $^{17}$O heavy ions scattered on different nuclei at about hundred Mev/nucleon are made, and the acceptable qualitative agreement with the experimental data is obtained without introducing free parameters. The prospect of the method for further applications is discussed.
description: 9 pages, 3 figures, 1 table, submitted to "Partices and Nuclei, Letters"
Some effects of different coordinate systems in cosmology
Creators: name: Grib, A. A.
name: Pavlov, Yu. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The analysis of the dynamics of radial movement in different reference frames used in cosmology is made. Use of different frames leads to the difference in inertial forces resulting in different observable effects. The important effect is the appearance in the system different from the synchronous one of the acceleration proportional to the distance analogous to the action of the cosmological constant. Numerical estimate of the difference of this effective cosmological constant and the invariant constant in Einstein equations is made.
description: 10 pages, no figures
Macroeconomic Policy and Agricultural Cycles in Australia and the United States
Creators: name: Hallberg, Milton C.
name: Herendeen, James B.
name: Hallberg, Milton C.
name: Herendeen, James B.
Publisher: name: Unknown
Year: 1996
Subjects: Agricultural and Food Policy

description: The agricultural economies of Australia and the United States experienced a major boom in the 1970s and a major bust in the 1980s. This paper examines the contribution of macroeconomic policy to these phenomena in the two countries over the last twenty years. We find that the observed agricultural cycles in the two countries were in part the unintended consequences of macroeconomic policies pursued for other reasons. Agriculture in both countries is heavily dependent on export demand and is highly capital intensive. Macroeconomic policies affecting exchange rates and interest rates are thus of considerable importance to these sectors. Implications for agricultural policy are also discussed.
Louis-Philippe Dalembert. Milwaukee Blues
Creators: name: Boraso, Silvia
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

Compte rendu de Dalembert, L.-P. (2021). Milwaukee Blues. Paris : Sabine Wespieser Éditeur, 281 pp.

description: Il Tolomeo