cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Photometric Evolution of SNe Ib/c 2004ao, 2004gk and 2006gi
Creators: name: Elmhamdi, A.
name: Tsvetkov, D.
name: Danziger, I. J.
name: Kordi, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Photometric observations of three core collapse supernovae (SNe 2004ao, 2004gk and 2006gi), covering about 200 days of evolution are presented and analyzed. The photometric behaviour of the three objects is consistent with their membership of the envelope-stripped type Ib/c class. Pseudo-bolometric light curves are constructed. The corresponding measured $e$-folding times are found to be faster compared to the $^{56}$Co decay (i.e. 111.3 d), suggesting that a proportion of $γ$-rays increasing with time have escaped without thermalization, owing to the low mass nature of the ejecta. SN 2006gi has almost identical post maximum decline phase luminosities as SN 1999ex, and found to be similar to both SNe 1999dn and 1999ex in terms of the quasi-bolometric shape, placing it among the fast decliner Ib objects. SN 2004ao appears to fit within the slow decliner Ib SNe. SNe 2004ao and 2004gk display almost identical luminosities in the [50-100] days time interval, similar to SN 1993J. A preliminary simplified $γ-$ray deposition model is described and applied to the computed pseudo-bolometric light curves, allowing one to find a range in the ejecta and $^{56}$Ni masses. The optical and quasi-bolometric light curves, and the $B-V$ colour evolution of SN 2004gk are found to show a sudden drop after day 150. Correlating this fact to dust formation is premature and requires further observational evidence.
description: Accepted for publication in The Astrophysical Journal; (11 two-columns Pages, 11 figures, 6 Tables; Scheduled for publication in April 2011)
Magnetized baryonic matter in holographic QCD
Creators: name: Thompson, Ethan G.
name: Son, Dam T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the properties of the Sakai-Sugimoto model at finite magnetic field and baryon chemical potentials. We show that in a finite magnetic field, there exists a spatially homogeneous configuration carrying finite baryon number density. At low magnetic field and baryon chemical potential the equation of state of the matter coincides with that obtained from the chiral perturbation theory Lagrangian with an anomalous term. We discuss the behavior of the system at larger magnetic fields.
description: 13 pages
Confirmation of quark-hadron duality in the neutron F_2 structure function
Creators: name: Malace, S. P.
name: Kahn, Y.
name: Melnitchouk, W.
name: Keppel, C. E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We apply a recently developed technique to extract for the first time the neutron F_2^n structure function from inclusive proton and deuteron data in the nucleon resonance region, and test the validity of quark-hadron duality in the neutron. We establish the accuracy of duality in the low-lying neutron resonance regions over a range of Q^2, and compare with the corresponding results on the proton and with theoretical expectations. The confirmation of duality in both the neutron and proton opens the possibility of using resonance region data to constrain parton distributions at large x.
description: 4 pages, 4 figures; minor content changes; to appear in Phys. Rev. Lett
Gyrofluid analysis of electron $β_e$ effects on collisionless reconnection
Creators: name: Granier, Camille
name: Borgogno, Dario
name: Grasso, Daniela
name: Tassi, Emanuele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The linear and nonlinear evolutions of the tearing instability in a collisionless plasma with a strong guide field are analyzed on the basis of a two-field Hamiltonian gyrofluid model. The model is valid for a low ion temperature and a finite $β_e$. The finite $β_e$ effect implies a magnetic perturbation along the guide field direction and electron finite Larmor radius effects. A Hamiltonian derivation of the model is presented. A new dispersion relation of the tearing instability is derived for the case $β_e=0$ and tested against numerical simulations. For $β_e \ll 1$ the equilibrium electron temperature is seen to enhance the linear growth rate, whereas we observe a stabilizing role when electron finite Larmor radius effects become more relevant. In the nonlinear phase, a double "faster-than-exponential" growth is observed, similarly to what occurs in the presence of ion finite Larmor radius effects. Energy transfers are analyzed and the conservation laws associated with the Casimir invariants of the model are also discussed. Numerical simulations seem to indicate that finite $β_e$ effects do not produce qualtitative modifications in the structures of the Lagrangian invariants associated with Casimirs of the model.
Multilevel Decoders Surpassing Belief Propagation on the Binary Symmetric Channel
Creators: name: Planjery, Shiva Kumar
name: Declercq, David
name: Chilappagari, Shashi Kiran
name: Vasić, Bane
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we propose a new class of quantized message-passing decoders for LDPC codes over the BSC. The messages take values (or levels) from a finite set. The update rules do not mimic belief propagation but instead are derived using the knowledge of trapping sets. We show that the update rules can be derived to correct certain error patterns that are uncorrectable by algorithms such as BP and min-sum. In some cases even with a small message set, these decoders can guarantee correction of a higher number of errors than BP and min-sum. We provide particularly good 3-bit decoders for 3-left-regular LDPC codes. They significantly outperform the BP and min-sum decoders, but more importantly, they achieve this at only a fraction of the complexity of the BP and min-sum decoders.
description: 5 pages, in Proc. of 2010 IEEE International Symposium on Information Theory (ISIT)
Approximate quantum cloaking and almost trapped states
Creators: name: Greenleaf, A.
name: Kurylev, Y.
name: Lassas, M.
name: Uhlmann, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We describe families of potentials which act as approximate cloaks for matter waves, i.e., for solutions of the time-independent Schrödinger equation at energy $E$, with applications to the design of ion traps. These are derived from perfect cloaks for the conductivity and Helmholtz equations, by a procedure we refer to as isotropic transformation optics. If $W$ is a potential which is surrounded by a sequence $\{V_n^E\}_{n=1}^\infty$ of approximate cloaks, then for generic $E$, asymptotically in $n$ (i) $W$ is both undetectable and unaltered by matter waves originating externally to the cloak; and (ii) the combined potential $W+V_n^E$ does not perturb waves outside the cloak. On the other hand, for $E$ near a discrete set of energies, cloaking {\it per se} fails and the approximate cloaks support wave functions concentrated, or {\it almost trapped}, inside the cloaked region and negligible outside. Applications include ion traps, almost invisible to matter waves or customizable to support almost trapped states of arbitrary multiplicity. Possible uses include simulation of abstract quantum systems, magnetically tunable quantum beam switches, and illusions of singular magnetic fields.
description: Revised, with new figures. Single column format
CIFRA National Survey: Uruguay August 2009
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Personal banking choices; smoking habits; recent doctor visits; internet connection; current events sources; main problems of country; interest in politics; attitudes towards political parties; voting in primary elections; likability of political leaders; approval of President Tabaré Vázquez; approval of district mayor; past voting history; political spectrum position; potential future voting choices/plans; rights of minorities; national medical problems; approval of government economic policy; referendum on the Expiry Law; referendum on mail-in voting. National Agency for Research and Innovation (ANII) Collection.
Second-Scale $^9\text{Be}^+$ Spin Coherence in a Compact Penning Trap
Creators: name: McMahon, Brian J.
name: Sawyer, Brian C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report microwave spectroscopy of co-trapped $^9\text{Be}^+$ and $^{40}\text{Ca}^+$ within a compact permanent-magnet-based Penning ion trap. The trap is constructed with a reconfigurable array of NdFeB rings providing a 0.654 T magnetic field that is near the 0.6774-T magnetic-field-insensitive hyperfine transition in $^9\text{Be}^+$. Performing Ramsey spectroscopy on this hyperfine transition, we demonstrate nuclear spin coherence with a contrast decay time of >1 s. The $^9\text{Be}^+$ is sympathetically cooled by a Coulomb crystal of $^{40}\text{Ca}^+$, which minimizes $^9\text{Be}^+$ illumination and thus mitigates reactive loss. Introducing a unique high-magnetic-field optical detection scheme for $^{40}\text{Ca}^+$, we perform spin state readout without a 729~nm shelving laser. We record a fractional trap magnetic field instability below 20 ppb (<13 nT) at 43 s of averaging time with no magnetic shielding and only passive thermal isolation. We discuss potential applications of this compact, reconfigurable Penning trap.
description: 6 pages, 4 figures
A Computational Study of Genetic Crossover Operators for Multi-Objective Vehicle Routing Problem with Soft Time Windows
Creators: name: Geiger, Martin Josef
Publisher: name: arXiv
Year: 2008
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The article describes an investigation of the effectiveness of genetic algorithms for multi-objective combinatorial optimization (MOCO) by presenting an application for the vehicle routing problem with soft time windows. The work is motivated by the question, if and how the problem structure influences the effectiveness of different configurations of the genetic algorithm. Computational results are presented for different classes of vehicle routing problems, varying in their coverage with time windows, time window size, distribution and number of customers. The results are compared with a simple, but effective local search approach for multi-objective combinatorial optimization problems.
Proton spectra from Non-Mesonic Weak Decay of p-shell Lambda-Hypernuclei and evidence for the two-nucleon induced process
Creators: name: Agnello, M.
name: Andronenkov, A.
name: Beer, G.
name: Benussi, L.
name: Bertani, M.
name: Bhang, H. C.
name: Bonomi, G.
name: Botta, E.
name: Bregant, M.
name: Bressani, T.
name: Bufalino, S.
name: Busso, L.
name: Calvo, D.
name: Camerini, P.
name: Dalena, B.
name: De Mori, F.
name: DErasmo, G.
name: Fabbri, F. L.
name: Feliciello, A.
name: Filippi, A.
name: Fiore, E. M.
name: Fontana, A.
name: Fujioka, H.
name: Genova, P.
name: Gianotti, P.
name: Grion, N.
name: Hartmann, O.
name: Lenti, V.
name: Lucherini, V.
name: Marcello, S.
name: Maruta, T.
name: Mirfakhrai, N.
name: Montagna, P.
name: Morra, O.
name: Nagae, T.
name: Nakajima, D.
name: Outa, H.
name: Pace, E.
name: Palomba, M.
name: Pantaleo, A.
name: Panzarasa, A.
name: Paticchio, V.
name: Piano, S.
name: Pompili, F.
name: Rui, R.
name: Sekimoto, M.
name: Simonetti, G.
name: Toyoda, A.
name: Wheadon, R.
name: Zenoni, A.
name: Garbarino, G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: New spectra from the FINUDA experiment of the Non Mesonic Weak Decay (NMWD) proton kinetic energy for 9(Lambda)Be, 11(Lambda)B, 12(Lambda)C, 13(Lambda)C, 15 (Lambda)N and 16(Lambda)O are presented and discussed along with the published data on 5(Lambda)He and 7(Lambda)Li. Exploiting the large mass number range and the low energy threshold (15 MeV) for the proton detection of FINUDA, an evaluation of both Final State Interactions (FSI) and the two nucleon induced NMWD contributions to the decay process has been done. Based on this evaluation, a linear dependence of FSI on the hypernuclear mass number A is found and for the two nucleon stimulated decay rate the experimental value of Gamma2/Gammap=0.43+-0.25 is determined for the first time. A value for the two nucleon stimulated decay rate to the total decay rate Gamma2/GammaNMWD=0.24+-0.10 is also extracted.
description: 11 pages and 2 figures
Secret Key Agreement from Correlated Gaussian Sources by Rate Limited Public Communication
Creators: name: Watanabe, Shun
name: Oohama, Yasutada
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We investigate the secret key agreement from correlated Gaussian sources in which the legitimate parties can use the public communication with limited rate. For the class of protocols with the one-way public communication, we show a closed form expression of the optimal trade-off between the rate of key generation and the rate of the public communication. Our results clarify an essential difference between the key agreement from discrete sources and that from continuous sources.
description: 9 pages, no figure, Version 2 is a published version. The results are not changed from version 1. Explanations are polished
Toward a Minimum Branching Fraction for Dark Matter Annihilation into Electromagnetic Final States
Creators: name: Dent, James B.
name: Scherrer, Robert J.
name: Weiler, Thomas J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observational limits on the high-energy neutrino background have been used to place general constraints on dark matter that annihilates only into standard model particles. Dark matter particles that annihilate into neutrinos will also inevitably branch into electromagnetic final states through higher-order tree and loop diagrams that give rise to charged leptons, and these charged particles can transfer their energy into photons via synchrotron radiation or inverse Compton scattering. In the context of effective field theory, we calculate the loop-induced branching ratio to charged leptons and show that it is generally quite large, typically >1%, when the scale of the dark matter mass exceeds the electroweak scale, M_W. For a branching fraction >3%, the synchrotron radiation bounds on dark matter annihilation are currently stronger than the corresponding neutrino bounds in the interesting mass range from 100 GeV to 1 TeV. For dark matter masses below M_W, our work provides a plausible framework for the construction of a model for "neutrinos only" dark matter annihilations.
description: 18 pages, 4 figures, discussion added, matches version in Phys. Rev. D
Revised fits to $Δα/α$ in consistency with the accelerating universe
Creators: name: Fujii, Yasunori
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: An attempt is made for a new type of analysis of the time-variability of the fine-structure constant trying to fit the most recent result from the laboratory measurements, the Oklo constraint and the data from the QSO absorption lines all in consistency with the accelerating universe.
description: 8 pages, 3 figures. Revised references
Backaction of a charge detector on a double quantum dot
Creators: name: Ouyang, Shi-Hua
name: Lam, Chi-Hang
name: You, J. Q.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a master equation approach to study the backaction of quantum point contact (QPC) on a double quantum dot (DQD) at zero bias voltage. We reveal why electrons can pass through the zero-bias DQD only when the bias voltage across the QPC exceeds a threshold value determined by the eigenstate energy difference of the DQD. This derived excitation condition agrees well with experiments on QPC-induced inelastic electron tunneling through a DQD [S. Gustavsson et al., Phys. Rev. Lett. 99, 206804(2007)]. Moreover, we propose a new scheme to generate a pure spin current by the QPC in the absence of a charge current.
description: 6 pages, 4 figures
Towards Intelligent Traffic Solution: A Literature Review on Traffic Management Using 5G Networks.pdf
Creators: name: Mole, Patrick
Publisher: name: figshare
Year: 2021
Subjects: subject: 100510 Wireless Communications
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Abstract:
Traffic congestion has become a critical concern among cities nowadays due to urbanization. Thus, intelligent traffic management solutions are required to cope with several issues and challenges. An intelligent traffic system can be valuable when shared with services utilizing the 5G network. This paper presents a literature review study on the 5G network and its capabilities to enhance urban traffic management. The literature review demonstrates the lapses in different traffic optimization and simulation tools and argues that the 5G network might be a step towards the issues in attaining high-efficient traffic management. Furthermore, the key technologies of the 5G network and its distinctive features have been analyzed in this paper and scrutinize the current possibilities.
A Flat Photoionization Rate at 2
Creators: name: Faucher-Giguere, C. -A.
name: Lidz, A.
name: Hernquist, L.
name: Zaldarriaga, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the implications of our measurement of the Lyman-alpha forest opacity at redshifts 2~3. Our measurement argues against a star formation rate density declining beyond z~3, in contrast with existing state-of-the-art determinations of the cosmic star formation history from direct galaxy counts. Stellar emission from galaxies therefore likely reionized the Universe.
description: 5 pages, including 1 figure, published by ApJ
Doctoral thesis recital (jazz saxophone (lecture))
Creators: name: Sayers, Dave (David G.)
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Jazz
Musical analysis
Henderson, Joe, 1937-2001

description: An analysis of perpetual motivic development in the blues solos of Joe Henderson -- [Performance]. Homestretch ; Granted ; If ; Computer G ; Isotope / Joe Henderson (performed by: Dave Sayers, tenor saxophone ; Sam Pankey, bass ; Don Gozzard, drums)
title: The impact of gender-neutral pronouns on perceptions of candidates
Creators: name: Steinhauer, Brooke
Publisher: name: Memorial University of Newfoundland
Year: 2021

description: This study examines the role of candidate pronouns in the process of candidate evaluations. The experiment investigates what assumptions voters will make about gender neutral candidates and how voters will react to candidates who use gender neutral pronouns. Specifically, it explores candidates with gender neutral pronouns and voter perceptions of these candidates. Findings suggest that, overall, candidates who use gender neutral pronouns are not at a disadvantage when it comes to candidate evaluations. Candidates who use they/them pronouns are more likely to be favoured in comparison to candidates who use he/him pronouns but less likely to be favoured in comparison to candidates who use she/her pronouns. The results contradict the widely accepted notion that men are likely to be perceived more positively by voters than women. Finally, the author considers the ramifications of these results on future scholarship and what it means for women and gender diverse political candidates.
Orthocentrus patulus HOLMGREN 1858
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Orthocentrus
Orthocentrus patulus

description: Orthocentrus patulus HOLMGREN, 1858
M a t e r i a l e x a m i n e d: Trap 7: 1♀ 23.iv.-5.v.; trap 12: 1♀ 20.v.-1.vi., 1♀ 13-27.vii.
D i s t r i b u t i o n: West Palaearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 118, DOI: 10.5281/zenodo.10415120
Pion Scattering in Wilson Chiral Perturbation Theory
Creators: name: Aoki, Sinya
name: Bar, Oliver
name: Biedermann, Benedikt
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compute the scattering amplitude in Wilson Chiral Perturbation Theory for two flavors. The lattice spacing effects due to the explicit chiral symmetry breaking are kept through O(a^2), and we consider the regime where the quark mass m is of order a^2 Lambda_^3. Analytic expressions for the scattering lengths in different isospin channels are given. As a result of the O(a^2) terms the scattering lengths do not vanish in the chiral limit. Moreover, additional chiral logarithms proportional to a^2 ln M_pi^2 are present in the one-loop results. These contributions can obscure the continuum chiral logarithms and the determination of low-energy constants from numerical lattice simulations.
description: 7 pages, 3 figures; poster presented at the XXVI International Symposium on Lattice Field Theory, July 14-19 2008, Williamsburg, Virginia, USA
The Bible in Medieval Love Lyrics: A Fundamental Element of European Poetry Books
Creators: name: Hackett, Robert Lincoln <1982>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: L-LIN/01 Glottologia e linguistica

description: The focus of this study is the relationship among three different manuscripts (Modena, Bibl. Estense, MS α.R.4.4; Firenze, Bibl. Laurenziana MS Rediano 9; and London, BL, MS Harley, 2253) and the poetry they transmit. The aim of this research is to show the ways that the Bible was used in the transmission of the lyric poetry in the three literatures that they represent: Occitan (primarily through Marcabru’s songs), Italian (through the love poetry of Guittone d’Arezzo), and Middle English (through the Harley love lyrics and the MS.’s primary scribe), in a medieval European context.
Quark mixing sum rules and the right unitarity triangle
Creators: name: Antusch, Stefan
name: King, Stephen F.
name: Malinsky, Michal
name: Spinrath, Martin
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In analogy with the recently proposed lepton mixing sum rules, we derive quark mixing sum rules for the case of hierarchical quark mass matrices with 1-3 texture zeros, in which the separate up and down type 1-3 mixing angles are approximately zero, and $V_{ub}$ is generated from $V_{cb}$ as a result of 1-2 up type quark mixing. Using the sum rules, we discuss the phenomenological viability of such textures, including up to four texture zeros, and show how the right-angled unitarity triangle, i.e., $α\approx 90^\circ$, can be accounted for by a remarkably simple scheme involving real mass matrices apart from a single element being purely imaginary. In the framework of grand unified theories we show how the quark and lepton mixing sum rules may combine to yield an accurate prediction for the reactor angle.
description: 8 pages, 1 figure; version published in PRD
Collective Motion due to escape and pursuit response
Creators: name: Romanczuk, Pawel
name: Couzin, Iain D.
name: Schimansky-Geier, Lutz
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Recent studies suggest that non-cooperative behavior such as cannibalism may also be a driving mechanism of collective motion. Motivated by these novel results we introduce a simple model of Brownian particles interacting by pursuit and escape interactions. We show the onset of collective motion due to escape and pursuit response of individuals and demonstrate how experimentally accessible macroscopic observables depend strongly on the ratio of the escape and pursuit strength. We analyze the different impact of the escape and pursuit response on the motion statistics and determine the scaling of the migration speed with model parameters.
Ezekial Jones House
Creators: name: Weber, Harvey A.
Publisher: name: Unknown
Year: 1970
Subjects: Photographs
Photos
Historic buildings
East Hampton
Structures
Dwellings

description: These images show front exterior views from the sidewalk of the Ezekial Jones House located on Montauk Highway at the west side of East Hampton. This image was taken by photographer Harvey A. Weber (1917-1991) and is part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
AdS black disk model for small-x DIS
Creators: name: Cornalba, Lorenzo
name: Costa, Miguel S.
name: Penedones, Joao
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the approximate conformal invariance of QCD at high energies we consider a simple AdS black disk model to describe saturation in DIS. Deep inside saturation the structure functions have the same power law scaling, F_T ~ F_L ~ 1/x^w, where w is related to the expansion rate of the black disk with energy. Furthermore, the ratio F_L /F_T is given by the universal value (1+w)/(3+w), independently of the target. For virtual photon-photon scattering at high energies we obtain explicit expressions and ratios for the total cross sections of transverse and longitudinal photons in terms of the single parameter w.
description: 5 pages. Minor corrections
Sasakian Geometry: The Recent Work of Krzysztof Galicki
Creators: name: Boyer, Charles P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C25

description: This is a mainly expository article honoring my recently deceased friend and collaborator Krzysztof Galicki who died after a tragic hiking accident. I give a review of our recent work in Sasakian geometry. A few new results are also presented.
description: 34 pages, corrections made and references added
Fast spin rotations by optically controlled geometric phases in a quantum dot
Creators: name: Kim, Erik D.
name: Truex, Katherine
name: Xu, Xiaodong
name: Sun, Bo
name: Steel, D. G.
name: Bracker, A. S.
name: Gammon, D.
name: Sham, L. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate optical control of the geometric phase acquired by one of the spin states of an electron confined in a charge-tunable InAs quantum dot via cyclic 2pi excitations of an optical transition in the dot. In the presence of a constant in-plane magnetic field, these optically induced geometric phases result in the effective rotation of the spin about the magnetic field axis and manifest as phase shifts in the spin quantum beat signal generated by two time-delayed circularly polarized optical pulses. The geometric phases generated in this manner more generally perform the role of a spin phase gate, proving potentially useful for quantum information applications.
description: 4 pages, 3 figures, resubmitted to Physical Review Letters
Información técnica sobre la instalación y configuración de software para el Repositorio Nacional de Angola
Creators: name: United Nations Educational, Scientific and Cultural Organization
name: Ministério Do Ensino Superior, Ciência
name: Redalyc-Universidad Autónoma Del Estado De México
name: AmeliCA
name: Universidade Óscar Ribas
Publisher: name: Zenodo
Year: 2022
Subjects: Acceso Abierto
Angola
África
Configuración
Software
Sistema

description: Trabajo derivado del proyecto de colaboración entre Redalyc UAEM, AmeliCA, MESCTI y U. Óscar Ribas financiado por UNESCO para el desarrollo de una estrategia de Acceso Abierto en Angola. Vol. 30 de 38
description: {"references": ["DSpace 6.x Documentation (2018). https://wiki.lyrasis.org/display/DSDOC6x/DSpace+6.x+Documentation"]}
The Nature of UCDs: Internal Dynamics from an Expanded Sample and Homogeneous Database
Creators: name: Mieske, Steffen
name: Hilker, Michael
name: Jordan, Andres
name: Infante, Leopoldo
name: Kissler-Patig, Markus
name: Rejkuba, Marina
name: Richtler, Tom
name: Cote, Patrick
name: Baumgardt, Holger
name: West, Michael J.
name: Ferrarese, Laura
name: Peng, Eric W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have obtained high-resolution spectra of 23 ultra-compact dwarf galaxies (UCDs) in the Fornax cluster with -10.4>M_V>-13.5 mag (10^6 2*10^6 M_*) have M/L ratios twice as large as GCs (M < 2*10^6 M_*). We show that stellar population models tend to under-predict dynamical M/L ratios of UCDs and over-predict those of GCs. Considering the scaling relations of stellar spheroids, UCDs align well along the 'Fundamental Manifold', constituting the small-scale end of the galaxy sequence. The alignment for UCDs is especially clear for r_e >~ 7 pc, which corresponds to dynamical relaxation times that exceed a Hubble time. In contrast, GCs exhibit a broader scatter and do not appear to align along the manifold. We argue that UCDs are the smallest dynamically un-relaxed stellar systems, with M > 2*10^6 M_* and 7
description: 17 pages, 14 figures, accepted for publication in A&A. V3 taking into account proof corrections: Table 3 radial velocity entries corrected by heliocentric correction, updated sigma entries in Table 5 for a few CenA sources, updated references for G1 and omega Cen
Extendibility limits the performance of quantum processors
Creators: name: Kaur, Eneet
name: Das, Siddhartha
name: Wilde, Mark M.
name: Winter, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Resource theories in quantum information science are helpful for the study and quantification of the performance of information-processing tasks that involve quantum systems. These resource theories also find applications in other areas of study; e.g., the resource theories of entanglement and coherence have found use and implications in the study of quantum thermodynamics and memory effects in quantum dynamics. In this paper, we introduce the resource theory of unextendibility, which is associated to the inability of extending quantum entanglement in a given quantum state to multiple parties. The free states in this resource theory are the k-extendible states, and the free channels are k-extendible channels, which preserve the class of k-extendible states. We make use of this resource theory to derive non-asymptotic, upper bounds on the rate at which quantum communication or entanglement preservation is possible by utilizing an arbitrary quantum channel a finite number of times, along with the assistance of k-extendible channels at no cost. We then show that the bounds obtained are significantly tighter than previously known bounds for quantum communication over both the depolarizing and erasure channels.
description: 7 pages, 2 figures, see companion paper at arXiv:1803.10710
Toroidal field instability and eddy viscosity in Taylor-Couette flows
Creators: name: Gellert, M.
name: Rüdiger, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Toroidal magnetic fields subject to the Tayler instability can transport angular momentum. We show that the Maxwell and Reynolds stress of the nonaxisymmetric field pattern depend linearly on the shear in the cylindrical gap geometry. Resulting angular momentum transport also scales linear with shear. It is directed outwards for astrophysical relevant flows and directed inwards for superrotating flows with dOmega/dR>0. We define an eddy viscosity based on the linear relation between shear and angular momentum transport and show that its maximum for given Prandtl and Hartmann number depends linear on the magnetic Reynolds number Rm. For Rm=1000 the eddy viscosity is of the size of 30 in units of the microscopic value.
description: 5 pages, 6 figures
CIFRA National Survey: Uruguay July 2009
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Main problems of country; recent health issues; interest in politics; attitudes towards political parties; economic situation of your family; future financial expectations; purchasing household appliances; interest in football (soccer); voting in primary elections; economic situation of the country; likability of political leaders; approval of President Tabaré Vázquez; approval of police force; lowering legal age of accountability; past voting history; potential future voting plans/choices. National Agency for Research and Innovation (ANII) Collection.
Detection of an anomalous cluster in a network
Creators: name: Arias-Castro, Ery
name: Candès, Emmanuel J.
name: Durand, Arnaud
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We consider the problem of detecting whether or not, in a given sensor network, there is a cluster of sensors which exhibit an "unusual behavior." Formally, suppose we are given a set of nodes and attach a random variable to each node. We observe a realization of this process and want to decide between the following two hypotheses: under the null, the variables are i.i.d. standard normal; under the alternative, there is a cluster of variables that are i.i.d. normal with positive mean and unit variance, while the rest are i.i.d. standard normal. We also address surveillance settings where each sensor in the network collects information over time. The resulting model is similar, now with a time series attached to each node. We again observe the process over time and want to decide between the null, where all the variables are i.i.d. standard normal, and the alternative, where there is an emerging cluster of i.i.d. normal variables with positive mean and unit variance. The growth models used to represent the emerging cluster are quite general and, in particular, include cellular automata used in modeling epidemics. In both settings, we consider classes of clusters that are quite general, for which we obtain a lower bound on their respective minimax detection rate and show that some form of scan statistic, by far the most popular method in practice, achieves that same rate to within a logarithmic factor. Our results are not limited to the normal location model, but generalize to any one-parameter exponential family when the anomalous clusters are large enough.
description: Published in at http://dx.doi.org/10.1214/10-AOS839 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
O-V-S-Z and friends: Non-Gaussianity from inhomogeneous reionization
Creators: name: Khatri, Rishi
name: Wandelt, Benjamin D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We calculate the cosmic microwave background (CMB) bispectrum due to inhomogeneous reionization. We calculate all the terms that can contribute to the bispectrum that are products of first order terms on all scales in conformal Newtonian gauge. We also correctly account for the de-correlation between the matter density and initial conditions using perturbation theory up to third order. We find that the bispectrum is of local type as expected. For a reasonable model of reionization, in which the Universe is completely ionized by redshift z_{ri} ~ 8 with optical depth to the last scattering surface τ_0=0.087 the signal to noise for detection of the CMB temperature bispectrum is S/N ~ 0.1 and confusion in the estimation of primordial non-Gaussianity is f_{NL} ~ -0.1. For an extreme model with z_{ri} ~ 12.5, τ_0=0.14 we get S/N ~ 0.5 and f_{NL} ~ -0.2.
description: Published version
Genetic Algorithms for multiple objective vehicle routing
Creators: name: Geiger, Martin Josef
Publisher: name: arXiv
Year: 2008
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The talk describes a general approach of a genetic algorithm for multiple objective optimization problems. A particular dominance relation between the individuals of the population is used to define a fitness operator, enabling the genetic algorithm to adress even problems with efficient, but convex-dominated alternatives. The algorithm is implemented in a multilingual computer program, solving vehicle routing problems with time windows under multiple objectives. The graphical user interface of the program shows the progress of the genetic algorithm and the main parameters of the approach can be easily modified. In addition to that, the program provides powerful decision support to the decision maker. The software has proved it's excellence at the finals of the European Academic Software Award EASA, held at the Keble college/ University of Oxford/ Great Britain.
An inner automorphism is only an inner automorphism, but an inner endomorphism can be something strange
Creators: name: Bergman, George M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Rings and Algebras (math.RA)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 16W20 (Primary), 08B25, 16W25, 17B40, 18A25, 18C05, 20A99, 46L05 (Secondary)

description: The inner automorphisms of a group G can be characterized within the category of groups without reference to group elements: they are precisely those automorphisms of G that can be extended, in a functorial manner, to all groups H given with homomorphisms G --> H. Unlike the group of inner automorphisms of G itself, the group of such extended systems of automorphisms is always isomorphic to G. A similar characterization holds for inner automorphisms of an associative algebra R over a field K; here the group of functorial systems of automorphisms is isomorphic to the group of units of R modulo units of K. If one substitutes "endomorphism" for "automorphism" in these considerations, then in the group case, the only additional example is the trivial endomorphism; but in the K-algebra case, a construction unfamiliar to ring theorists, but known to functional analysts, also arises. Systems of endomorphisms with the same functoriality property are examined in some other categories; other uses of the phrase "inner endomorphism" in the literature, some overlapping the one introduced here, are noted; the concept of an inner {\em derivation} of an associative or Lie algebra is looked at from the same point of view, and the dual concept of a "co-inner" endomorphism is briefly examined. Several questions are posed.
description: 20 pages. To appear, Publicacions Mathem\`{a}tiques. The 1-1-ness result in the appendix has been greatly strengthened, an "Overview" has been added at the beginning, and numerous small rewordings have been made throughout
Large-scale dynamos in turbulent convection with shear
Creators: name: Käpylä, P. J.
name: Korpi, M. J.
name: Brandenburg, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) Aims: Three-dimensional numerical simulations of penetrative compressible convection with uniform horizontal shear are used to study dynamo action and the generation of large-scale magnetic fields. Methods: We consider cases where the magnetic Reynolds number is either marginal or moderately supercritical with respect to small-scale dynamo action in the absence of shear and rotation. The effects of magnetic helicity fluxes are studied by comparing results for the magnetic field with open and closed boundaries. Results: Without shear no large-scale dynamos are found even if the ingredients necessary for the alpha-effect (rotation and stratification) are present in the system. When uniform horizontal shear is added, a large-scale magnetic field develops, provided the boundaries are open. In this case the mean magnetic field contains a significant fraction of the total field. For those runs where the magnetic Reynolds number is between 60 and 250, small-scale dynamo is expected to be excited, but the field distribution is found to be similar to cases with smaller magnetic Reynolds number where the small-scale dynamo is not excited. In the case of closed (perfectly conducting) boundaries, magnetic helicity fluxes are suppressed and no large-scale fields are found. Similarly, poor large-scale field development is seen when vertical shear is used in combination with periodic boundary conditions in the horizontal directions. If, however, open (normal-field) boundary conditions are used in the x-direction, a large-scale field develops. These results support the notion that shear not only helps to generate the field, but it also plays a crucial role in driving magnetic helicity fluxes out of the system along the isocontours of shear, thereby allowing efficient dynamo action.
description: 10 pages, 19 figures, accepted for publication in Astron. Astrophys
Critical Loop Gases and the Worm Algorithm
Creators: name: Janke, Wolfhard
name: Neuhaus, Thomas
name: Schakel, Adriaan M. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The loop gas approach to lattice field theory provides an alternative, geometrical description in terms of fluctuating loops. Statistical ensembles of random loops can be efficiently generated by Monte Carlo simulations using the worm update algorithm. In this paper, concepts from percolation theory and the theory of self-avoiding random walks are used to describe estimators of physical observables that utilize the nature of the worm algorithm. The fractal structure of the random loops as well as their scaling properties are studied. To support this approach, the O(1) loop model, or high-temperature series expansion of the Ising model, is simulated on a honeycomb lattice, with its known exact results providing valuable benchmarks.
description: 34 pages, 12 figures; v2: 2 figures and 1 table added; v3: typo's corrected
Orthocentrus spurius GRAVENHORST 1829
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Orthocentrus
Orthocentrus spurius

description: Orthocentrus spurius GRAVENHORST, 1829
M a t e r i a l e x a m i n e d: Trap2: 1♀ 29.vi.-13.vii.
D i s t r i b u t i o n: Holarctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 118, DOI: 10.5281/zenodo.10415120
Accessibility and economic growth : a study of spatial differences in forest industry financing in British Columbia
Creators: name: Newell, Allan Roy
Publisher: name: University of British Columbia
Year: 2010

description: The availability of sufficient finance for long term capital investment is generally conceded to be a prerequisite for economic growth. The present thesis questioned whether friction of distance hampers entrepreneur-borrowers and lending institutions during negotiations which precede long term loan agreements. It was reasoned that if the distance handicap were significant, then a study of growth experiences of similar capital intensive firms should show an association between slow growth and low accessibility to financial intermediaries. A literature review and discussions with officials at different financial institutions suggested various factors which could intervene in the hypothesized relationship, so the key hypotheses were modified accordingly. An interview survey was undertaken of principals of fifty small and medium-sized forest industry firms distributed over various regions of the province of British Columbia. In addition to data collected on formal questionnaires, a record of verbal comments made by respondents was compiled after each interview. Information from the questionnaires was processed by computer. In nearly all checks for association, rigorous tests of significance could not be applied because of the small sample and number of meaningful categories within variables. The questionnaire data and. interview records were used in a qualitative appraisal of the key questions of the study. The findings were that there was little difference in growth experiences of similar firms with greater spatial separation from financial intermediaries, at least for distances less than 250 miles. For longer transaction distances there was evidence of friction of distance. The limited evidence suggested distance constrained "borrowers of capital more than institutions, although indirect evidence suggested that institutions were not completely unaffected "by distance. The conclusion was that accessibility was a factor affected patterns of finance, but did not exert profound influence. Businessmen were able to overcome distance in search of credit if sufficient effort were applied. Financial institutions require particular information concerning proposed investments and the question of whether the institution had personnel capable of interpreting such information was of more importance than difficulties of information collection posed by distance. The thesis examines the relevance of the hypotheses in the context of other major changes affecting the British Columbia forest industry.
A Representation Theorem for Singular Integral Operators on Spaces of Homogeneous Type
Creators: name: Mueller, Paul F. X.
name: Passenbrunner, Markus
Publisher: name: arXiv
Year: 2010
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42B20, 60G42, 46E40, 47B38

description: Let (X,d,μ) be a space of homogeneous type and E a UMD Banach space. Under the assumption mu({x})=0 for all x in X, we prove a representation theorem for singular integral operators on (X,d,mu) as a series of simple shifts and rearrangements plus two paraproducts. This gives a T(1) Theorem in this setting.