cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cavity-aided non-demolition measurements for atom counting and spin squeezing
Creators: name: Chen, Zilong
name: Bohnet, Justin G.
name: Weiner, Joshua M.
name: Cox, Kevin C.
name: Thompson, James K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Probing the collective spin state of an ensemble of atoms may provide a means to reduce heating via the photon recoil associated with the measurement and provide a robust, scalable route for preparing highly entangled states with spectroscopic sensitivity below the standard quantum limit for coherent spin states. The collective probing relies on obtaining a very large optical depth that can be effectively increased by placing the ensemble within an optical cavity such that the probe light passes many times through the ensemble. Here we provide expressions for measurement resolution and spectroscopic enhancement in such cavity-aided non-demolition measurements as a function of cavity detuning. In particular, fundamental limits on spectroscopic enhancements in $^{87}$Rb are considered.
description: Substantially shortened. 19 pages, 16 figures
Josef Deér, The Dynastic Porphyry Tombs of the Norman Period in Sicily
Creators: name: Demus, Otto
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Rezension zu: Josef Deér, The Dynastic Porphyry Tombs of the Norman Period in Sicily. (Dumbarton Oaks Studies Five). Cambridge, Mass., Harvard University Press, 1959. XVIII, 188 S., 66 S. Taf. $ 8.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 13 Nr. 1 (1960): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
A Stringy Mechanism for A Small Cosmological Constant - Multi-Moduli Cases -
Creators: name: Sumitomo, Yoske
name: Tye, S. -H. Henry
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Based on the properties of probability distributions of functions of random variables, we proposed earlier a simple stringy mechanism that prefers the meta-stable vacua with a small cosmological constant Λ. As an illustration of this approach, we study in this paper particularly simple but non-trivial models of the Kähler uplift in the large volume flux compactification scenario in Type IIB string theory, where all parameters introduced in the model are treated either as fixed constants motivated by physics, or as random variables with some given uniform probability distributions. We determine the value w_0 of the superpotential W_0 at the supersymmetric minima, and find that the resulting probability distribution P(w_0) peaks at w_0=0; furthermore, this peaking behavior strengthens as the number of complex structure moduli increases. The resulting probability distribution P(Λ) for meta-stable vacua also peaks as Λ-> 0, for both positive and negative Λ. This peaking/divergent behavior of P(Λ) strengthens as the number of moduli increases. In some scenarios for Λ> 0, the likely value of Λdecreases exponentially as the number of moduli increases. The light cosmological moduli issue accompanying a very small Λis also mentioned.
description: 34+11 pages, 45 figures; v2: arguments improved, references added; v3: version to appear in JCAP
The Romantic Movement
Creators: name: Lankheit, Klaus
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 13 Nr. 2 (1960): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Quantisation of presymplectic manifolds, K-theory and group representations
Creators: name: Hochs, Peter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Symplectic Geometry (math.SG)
subject: K-Theory and Homology (math.KT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 53D50 (primary), 22E46, 46L80, 53D20 (secondary)

description: Let $G$ be a semisimple Lie group with finite component group, and let $K
Augusto Calabi, Saggio sulla litografia. La prima produzione italiana in rapporto a quella degli altri paesi sino al 1840
Creators: name: Keil, Nora
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Rezension zu: Augusto Calabi, Saggio sulla litografia. La prima produzione italiana in rapporto a quella degli altri paesi sino al 1840. Milano, 1958. 166 Seiten, 36 Tafeln.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 13 Nr. 2 (1960): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
«Changemaker-Schulen» – digitale Transformation im Bildungsraum Nordwestschweiz. Abschlussbericht
Creators: name: Beywl, Wolfgang
name: Schuler, Manuela
name: Huber Cruz, Rina Maria
name: Tulowitzki, Pierre
Publisher: name: Pädagogische Hochschule FHNW
Year: 2021
Subjects: subject: Fernunterricht
subject: Schule
subject: Covid-19
subject: Digitaler Wandel
subject: Fokusgruppe
subject: Schulentwicklung
subject: Unterrichtsentwicklung
subject: imedias
subject: Bildungraum Nordwestschweiz (BRNW)
subject: PICTS
subject: ICT
subject: IKT
subject: Inklusiv-instrumentelle Forschung
subject: Feedback
subject: 370 - Erziehung, Schul- und Bildungswesen

description: Was sind die Erfolgsgeheimnisse von Schulen, die im pandemiebedingten Fernunterricht schnell digitale Möglichkeiten ausbauen? Antworten geben 18 Primar- und Sekundar-1 Schulen. Es werden Basisinformationen zu ICT-Ausstattung, -Konzepten und -Kompetenzen erfasst. 39 Lehrpersonen und Schulleitende diskutieren in Gruppen zu Ermöglichern des digitalen Wandels und ihren Perspektiven. Es zeigt sich: Voraussetzung sind eine gute Hard- und Software Ausstattung sowie qualifizierte pädagogische ICT-Supporter. So können Lehrpersonen schnell Lernplattformen, Clouds, Videokonferenz-Systeme, Messenger-Dienste für den Elternkontakt und andere digitale Tools gewinnbringend für das Lernen der Schülerinnen einsetzen. Bewährtes nehmen die Schulen in den künftigen Präsenzunterricht mit: z. B. für individualisierte Lernwege, förderndes Feedback und Elternkontakte.
Mackeprang, M. B.: De nordiske Guldbrakteater
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Mackeprang, M. B.: De nordiske Guldbrakteater. Jysk Arkaeo- rogisk Selskabs Skrifter. Aarhus: Universitetsforlaget, Band II 1952. 228 S. m. 27 Abb. im Text u. 28 Taf. Engl. Zusammenfassung
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 22 (1953): Nachrichten aus Niedersachsens Urgeschichte
Bibby, Geoffey: Faustkeil und Bronzeschwert
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Bibby, Geoffey: Faustkeil und Bronzeschwert. Frühzeitforschung in Nordeuropa. Hamburg (Rowohlt-Verlag) 1957. 364 Seiten mit 115 Abb. im Text und auf 32 Kunstdrucktaf. Leinen
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 27 (1958): Nachrichten aus Niedersachsens Urgeschichte
title: "We are still alive. We have been harmed but we are brave and strong." A research on the long-term consequences of war rape and coping strategies of survivors in Bosnia and Herzegovina
title: "We are still alive. We have been harmed but we are brave and strong." A research on the long-term consequences of war rape and coping strategies of survivors in Bosnia and Herzegovina. Summary
title: Summary
titleType: Subtitle
Creators: name: Medica Zenica
name: Medica Mondiale E.V.
Publisher: name: MM - medica mondiale
Year: 2014

description: Der Beitrag ist die Zusammenfassung einer umfangreichen Untersuchung, die in enger Kooperation von Medica Zenica und medica mondiale e.V. durchgeführt wurde. Gegenstand sind die Langzeitfolgen von Kriegsvergewaltigung und die Copingstrategien Überlebender in Bosnien-Herzegowina: Wie geht es den Frauen, die Kriegsvergewaltigung überlebt haben, 20 Jahre nach dem Krieg in Bosnien-Herzegowina (1992-1995), und wie haben sie überlebt? Es wurden quantitative und qualitative Verfahren eingesetzt.
description: This document is a summary of a extensive study, which was researched by a cooperation of Medica Zenica and medica mondiale e.V.. Subject of the study are longterm effects of being raped in war situations and the coping strategies of survivors in Bosnia-Herzegowina: How do the women feel now, 20 years after the war (1992-1995), how did they survive? Quantitative and qualitative methods were used.
description: Multi-method design: standardisierte Fragebögen, Fokusgruppen-Interviews und Lebensgeschichtliche Interviews; außerdem Key informant-Interviews
description: multi-method design: standardized questionnaire,focus group interviews and biographical interviews; key informant-interviews
description: Stichprobe: 51 Frauen
description: sample: 51 women
description: Medica Zenica hat versucht, alle 119 Frauen zu kontaktieren, für die eine Dokumentation vorlag.
        51 Frauen waren erreichbar und bereit teilzunehmen.
CP and Discrete Flavour Symmetries
Creators: name: Holthausen, Martin
name: Lindner, Manfred
name: Schmidt, Michael A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give a consistent definition of generalised CP transformations in the context of discrete flavour symmetries. Non-trivial consistency conditions imply that every generalised CP transformation can be interpreted as a representation of an automorphism of the discrete group. This allows us to give consistent generalised CP transformations of popular flavour groups. We are able to clear up issues concerning recent claims about geometrical CP violation in models based on T', clarify the origin of 'calculable phases' in Delta(27) and explain why apparently CP violating scalar potentials of A4 result in a CP conserving ground state.
description: 31 pages; v2: references added, discussion of T' models extended and clarified; v3: discussion of generalised CP as well as examples Z3 and A4 extended, version published in JHEP; v4: typos corrected, clarifying footnote added
Pierre Eugene Du Simitière and The First American National Museum
Creators: name: Iachini, Gian Domenico
Publisher: name: RSAJournal
Year: 2012

description: This essay surveys the life and the graphic art of Pierre Eugene Du Simitière, a young citizen of Geneva, a painter, naturalist, and adventurer, who moved to the New World in 1757. Framed within the wider context of the birth of the modern museum, this essay focuses specifically on Du Simitière’s status as a lifelong collector and early scholar of the natural and social life of the American colonies/nation, which led to his production of one of the best libraries on the Continent and to the opening of the first historical national museum in Philadelphia in 1782. A witness to the American Revolution, from which he collected an impressive quantity of printed documents, especially those related to political protest, Du Simitière gradually involved himself in the struggle of the colonies for independence through his artwork and entrepreneurship, and served the Continental Congress in a variety of ways, particularly in the fashioning of the Great Seal of the United States. Author of the first-known Washington profile, Du Simitière was close to many of the major political and military leaders of his time and also with men of science and culture, and was himself a member and curator of the American Philosophical Society.
description: RSAJournal, V. 23 (2012): Turning In and Out of the American Century
Burg auf dem Kanstein bei Langelsheim a. Harz, Krs. Gandersheim
Creators: name: Tode, Alfred
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Animal Spirits Revisited
Creators: name: Lears, T. J. Jackson
Publisher: name: RSAJournal
Year: 2012

description: Focusing on the United States since the 1850s, this essay extends J. M. Keynes’s notion of “animal spirits” in economic life to include all the visceral impulses left out of the rational actor model, and to explore how those impulses have played out in a setting that is too often ignored by economists (even by Keynes himself) – the capitalist workplace.
description: RSAJournal, V. 23 (2012): Turning In and Out of the American Century
Waller, Karl: Der Urnenfriedhof in Wehden
Creators: name: Niquet, Franz
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Waller, Karl: Der Urnenfriedhof in Wehden, Hildesheim 1961. Die Urnenfriedhöfe in Niedersachsen, Band 4, Verlag Aug. Lax, 40, VI, 34 Seiten, 51 Tafeln
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Contemporary American Immigrant Literature
Creators: name: R. Carpio, Glenda
Publisher: name: RSAJournal
Year: 2012

description: Since the 1965 Hart-Cellar Immigration Act, which abolished the national quota system set in place by the Johnson-Reed Act of 1920, more than 20 million immigrants have entered the United States, half of whom arrived during the 1980s, mostly from countries in Asia, Latin America, and Africa. The new literature of immigration therefore deals with experiences of people who are not of European descent; it engages with American discourses of race as these intertwine with those of home countries and challenges the traditional focus in immigrant texts on the process of assimilation. Quite often this literature blurs the distinction between “immigrant” and “exile.” Focusing on Junot Díaz’s Drown (1996), The Brief Wondrous Life of Oscar Wao (2007), Dinaw Mengestu’s The Beautiful Things that Heaven Bears (2007), and two earlier texts, Henry Roth’s Call It Sleep (1934), a classic immigrant narrative, and Vladimir Nabokov’s Pnin (1953), a text that is rarely discussed as an immigrant narrative per se, I explore significant shifts in the tropes and aesthetic form of recent American immigrant fiction.
description: RSAJournal, V. 23 (2012): Turning In and Out of the American Century
Slomann, Wencke: Saetrangfunnet. Norske Oldfunn IX
Creators: name: Raddatz, Klaus
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Slomann, Wencke: Saetrangfunnet. Norske Oldfunn IX, Oslo 1959, 40, 62 Seiten, 2 Karten, 12 Tafeln
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
What the Times Require
Creators: name: Camboni, Marina
Publisher: name: RSAJournal
Year: 2012

description: The essay is an attempt to read the turn of the twenty-first century in the U.S. by investigating the subjective responses by a number of poets and novelists to events and aspects of the time. Focusing on the year 2000, in the first part I concentrate on a poem by Lucille Clifton and a novel by Don DeLillo, inferring from them the emergence of a post-humanist agenda but also the shared search for a new time to be created in the twenty- first century by its folding back upon the previous turn-of-century and re-imagining an American life project that had been left incomplete in the twentieth century. In the second part, I explore the name “America” and the narratives it is associated with in three recent, and emblematic, poems: Alicia Ostriker’s “Ghazal: America” (2012) and Richard Blanco’s “América” (1998) and “One Today” (2013). I argue that since Walt Whitman, U.S. poetry has taken “America” as “the centre and the axis of the whole,” i.e. the very place through which to “investigate the causes, growths, tallymarks of the time – the age’s matter and malady.”
description: RSAJournal, V. 23 (2012): Turning In and Out of the American Century
Women Writers on the Verge of the Twentieth Century
Creators: name: Balestra, Gianfranca
Publisher: name: RSAJournal
Year: 2012

description: This essay discusses how Edith Wharton fits into the turn of the twentieth century and its discontents as a writer accurately depicting society and its sometimes traumatic transformations, especially for women. While bearing in mind Wharton’s refusal to be labelled as a woman writer, it places her in the context of the social condition of women in the late nineteenth and early twentieth centuries and in connection with other contemporary women writers, before focusing on Wharton’s position in this rather complex picture in terms of her ideas and artistic achievements. While in her fiction she often engages in disturbing modern themes, she was rather mild in her narrative experimentation and objected to modernist techniques such as the stream of consciousness. This essay sides with the view of Wharton as a transitional figure, but argues in favor of her contribution to the transformation of American fiction at the turn and into the twentieth century and for her significant place in literary and cultural history.
description: RSAJournal, V. 23 (2012): Turning In and Out of the American Century
Descripción Fonológica De Las Oclusivas Orales Del Español
Creators: name: Veiga, Alexandre
name: Arias, Álvaro
Publisher: name: Zenodo
Year: 2015
Subjects: Spanish language
Spanish phonology

description: Alexandre Veiga y Álvaro Arias. «Descripción fonológica de las oclusivas orales del español», Fonética y Fonología Descriptivas de la Lengua Española, ed. de Juana Gil y Joaquim Llisterri, Madrid, Castalia y Consejo Superior de Investigaciones Científicas, en prensa.

http://personales.uniovi.es/web/ariasal/
Driehaus, Jürgen: Die Altheimer Gruppe und das Jungneolithikum in Mitteleuropa
Creators: name: Narr, Karl J.
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Driehaus, Jürgen: Die Altheimer Gruppe und das Jungneolithikum in Mitteleuropa. Mainz 1960: Römisch-German. Zentralmuseum. 245 Seiten in 40 mit 17 Abbildungen im Text und 59 Tafeln
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Complete nonclassicality test with a photon-number resolving detector
Creators: name: Kiesel, T.
name: Vogel, W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a method for the experimental measurement of nonclassicality witnesses and demonstrate its application. Our proposal only requires the coherent displacement of the initial state, which can be achieved by overlapping the latter with a coherent state at a beam splitter, and subsequent photon-number resolved detection. This setup allows a complete test of nonclassicality of an arbitrary quantum state. The role of the quantum efficiency as well as statistical and systematic uncertainties are discussed. Finally, the scheme is demonstrated for a realistic example.
description: 8 pages, 3 figures
Gummel, Hans: Hermann Allmers und die Altertumsforschung-Festschrift zur Wiedereröffnung des Morgensternmuseums
Creators: name: Waller, K.
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Gummel, Hans: Hermann Allmers und die Altertumsforschung-Festschrift zur Wiedereröffnung des Morgensternmuseums, herausgegeben vom Magistrat der Stadt Bremerhaven. 55 Seiten, 5 Tafeln. Bremerhaven 1961
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Raddatz, Klaus: Der Thorsberger Moorfund, Gürtelteile und Körperschmuck
Creators: name: Genrich, Albert
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Raddatz, Klaus: Der Thorsberger Moorfund, Gürtelteile und Körperschmuck. Neumünster, Verlag Karl Wachholtz, 1957, 40, 5 Textabb., 20 Tafeln, 15 Karten
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
On one-loop partition functions of three-dimensional critical gravities
Creators: name: Zojer, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We calculate the gravity one-loop partition function of three-dimensional parity even tricritical gravity. Agreement with logarithmic conformal field theory single-particle partition functions on the field theory side is found and we furthermore discover a partially massless limit of linearized six-derivative parity even gravity. Then we define a "truncation" of the critical theory, at the level of the partition function, by calculating black hole determinants via summation over quasi-normal mode spectra and discriminating against those modes which are not present in the physical spectrum. This "truncation" is applied to critical new massive gravity and three-dimensional parity even tricritical gravity.
description: 16 pages; v2: corrected mistake and changed discussion/presentation of section 3, conclusions unaltered; published version
Nichts hält ewig – Wie gehen wir damit um?
Creators: name: Haase, Robert
name: Hoth, Juliane
Publisher: name: Zenodo
Year: 2023
Subjects: core-facility
technology platform
service unit

description: Der Lebenszyklus einer Core-Facility (CF) im Akademischen Umfeld reicht von Gruendung der CF ueber Betrieb und Wandlung mitunter auch zur Schliessung. In diesem Vortrag diskutieren wir verschiedene Aspekte die zu beachten sind, sowohl langfristig, als auch kurzfristig vor der Schliessung. Ziele sind bestmoeglicher Einsatz von Resourcen, und Minimierung von Risiken und Schaden die durch die Schliessung entstehen. Der Vortrag wurde praesentiert auf dem 5. Ulmer Workshop 2023 "Lebenszyklus einer Core Facility: Entstehung - Entwicklung - Wandlung einer Core Facility" https://www.uni-ulm.de/einrichtungen/moman/workshop-cf-admin/2023/info/
Linear subspaces, symbolic powers and Nagata type conjectures
Creators: name: Dumnicki, Marcin
name: Harbourne, Brian
name: Szemberg, Tomasz
name: Tutaj-Gasińska, Halszka
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13A02, 13A15, 13F20, 13P99, 14C20, 14N20, 14Q99

description: Prompted by results of Guardo, Van Tuyl and the second author for lines in projective 3 space, we develop asymptotic upper bounds for the least degree of a homogeneous form vanishing to order at least m on a union of disjoint r dimensional planes in projective n space for n at least 2r+1. These considerations lead to new conjectures that suggest that the well known conjecture of Nagata for points in the projective plane is not sporadic, but rather a special case of a more general phenomenon.
description: 19 pages; made many minor improvements to exposition; one major improvement: replaced an example with 9 lines in P^4 by a family of examples with (n-1)^{n-2} lines in P^n for n >= 3
Quantum gravitational non-singular tunneling wavefunction proposal
Creators: name: Motaharfar, Meysam
name: Singh, Parampreet
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It was recently shown that tunneling wavefunction proposal is consistent with loop quantum geometry corrections including both holonomy and inverse scale factor corrections in the gravitational part of a spatially closed isotropic model with a positive cosmological constant. However, in presence of an inflationary potential the initial singularity is kinetic dominated and the effective minisuperspace potential again diverges at zero scale factor. Since the wavefunction in loop quantum cosmology cannot increase towards the zero scale factor, the tunneling wavefunction seems incompatible. We show that consistently including inverse scale factor modifications in scalar field Hamiltonian changes the effective potential into a barrier potential allowing the tunneling proposal. We also discuss a potential quantum instability of the cyclic universe resulting from tunneling.
description: Generalizes results of 2212.14065 by authors. Proceedings paper of 2nd ECU conference. 10 pages. 5 figures
Applications of the potential algebras of the two-dimensional Dirac-like operators
Creators: name: Jakubsky, Vit
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Potential algebras can be used effectively in the analysis of the quantum systems. In the article, we focus on the systems described by a separable, 2x2 matrix Hamiltonian of the first order in derivatives. We find integrals of motion of the Hamiltonian that close centrally extended so(3), so(2,1) or oscillator algebra. The algebraic framework is used in construction of physically interesting solvable models described by (2+1) dimensional Dirac equation. It is applied in description of open-cage fullerenes where the energies and wave functions of low-energy charge-carriers are computed. The potential algebras are also used in construction of shape-invariant, one-dimensional Dirac operators. We show that shape-invariance of the first-order operators is associated with the N=4 nonlinear supersymmetry which is represented by both local and nonlocal supercharges. The relation to the shape-invariant non-relativistic systems is discussed as well.
description: 20 pages, 4 figures; title modified, presentation simplified and extended, misprints corrected, references added; accepted in Annals of Physics
Constant curvature solutions of Grassmannian sigma models: (2) Non-holomorphic solutions
Creators: name: Delisle, Laurent
name: Hussin, Véronique
name: Zakrzewski, Wojtek J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We generalize here our general procedure for constructing constant curvature maps of 2-spheres into Grassmannian manifolds G(m,n) this time concentrating our attention on maps which are non-holomorphic. We present some expressions describing these solutions in the general case and discuss how to use these results to construct solutions of constant curvature. We also discuss possible values of this constant curvature.
description: 13 pages
title: К вопросу о категории «цифровая логистика»
Creators: name: Евдотиева, Татьяна
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Трансформация экономических отношений и цифровизация бизнеса оказывают влияние и на логистику как сферу деятельности, интегрирующую протекание потоковых процессов между субъектами экономических отношений. В связи с этим становится актуальным рассмотрение проблемы определения категориального аппарата, применяемого в условиях формирования цифровой экономики. В настоящее время отсутствует гармонизированное определение цифровой логистики. Целью статьи является рассмотрение и систематизация подходов к пониманию категории «цифровая логистика», имеющих место в современной научной литературе. Определено, что цифровая логистика рассматривается и как совокупность информационно-коммуникационных технологий в приложении к реализуемому набору логистических функций, и как определенные формы изменения в способах выстраивания взаимоотношений в логистических цепях на основе технологических нововведений, и как инновационное направление деятельности компаний.
Learning to rank from medical imaging data
Creators: name: Pedregosa, Fabian
name: Gramfort, Alexandre
name: Varoquaux, Gaël
name: Cauvet, Elodie
name: Pallier, Christophe
name: Thirion, Bertrand
Publisher: name: arXiv
Year: 2012
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Medical images can be used to predict a clinical score coding for the severity of a disease, a pain level or the complexity of a cognitive task. In all these cases, the predicted variable has a natural order. While a standard classifier discards this information, we would like to take it into account in order to improve prediction performance. A standard linear regression does model such information, however the linearity assumption is likely not be satisfied when predicting from pixel intensities in an image. In this paper we address these modeling challenges with a supervised learning procedure where the model aims to order or rank images. We use a linear model for its robustness in high dimension and its possible interpretation. We show on simulations and two fMRI datasets that this approach is able to predict the correct ordering on pairs of images, yielding higher prediction accuracy than standard regression and multiclass classification techniques.
Open Science Interview Mit Martin Fenner
Creators: name: Scheliga, Kaja
Publisher: name: Zenodo
Year: 2014
Subjects: open science
interviews
science 2.0
open access
digital scholarship
online tools
internet research
internet studies

description: This interview is part of a series of interviews on open science and digital scholarship conducted in 2013 with researchers from various backgrounds. For an analysis of the interviews see: Scheliga, Kaja and Sascha Friesike. 2014. “Putting open science into practice: A social dilemma?” First Monday. Volume 19, Number 9. DOI: http://dx.doi.org/10.5210/fm.v19i9.5381
The sensitivity of Cherenkov telescopes to dark matter and astrophysical anisotropies in the diffuse gamma-ray background
Creators: name: Ripken, Joachim
name: Cuoco, Alessandro
name: Zechlin, Hannes-S.
name: Conrad, Jan
name: Horns, Dieter
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In this article, the capability of present (H.E.S.S., MAGIC, VERITAS) and planned (CTA) ground-based Cherenkov telescope systems for detecting angular anisotropies in the diffuse gamma-ray background is investigated. Following up on a study of the impact of instrumental characteristics (effective area, field of view, angular resolution, and background rejection efficiency), the first part examines the influence of different observational strategies, i.e. whether a single deep observation or a splitting over multiple shallow fields is preferred. In the second part, the sensitivity to anisotropies generated by self-annihilating dark matter is studied for different common dark matter models. We find that a relative contribution of ~10% from dark matter annihilation to the extra-galactic diffuse gamma-ray background can be detected with planned configurations of CTA. In terms of the thermally-averaged self-annihilation cross section, the sensitivity of CTA corresponds to values below the thermal freeze-out expectation = 3 x 10-26 cm3s-1 for dark matter particles lighter than ~200 GeV. We stress the importance of constraining anisotropies from unresolved astrophysical sources with currently operating instruments already, as a novel and complementary method for investigating the properties of TeV sources.
description: 27 pages, 6 figures, 2 tables; v2: new paragraphs and figures added. Improvements in clarity of the text and readability of the figures. Conclusions unchanged. Matches published version on JCAP
Spin-liquid versus spiral-order phases in the anisotropic triangular lattice
Creators: name: Tocchio, Luca F.
name: Feldner, Hélène
name: Becca, Federico
name: Valentí, Roser
name: Gros, Claudius
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the competition between magnetic and spin-liquid phases in the Hubbard model on the anisotropic triangular lattice, which is described by two hopping parameters t and t' in different spatial directions and is relevant for layered organic charge-transfer salts. By using a variational approach that includes spiral magnetic order, we provide solid evidence that a spin-liquid phase is stabilized in the strongly-correlated regime and close to the isotropic limit t'/t=1. Otherwise, a magnetically ordered spiral state is found, connecting the (collinear) Néel and the (coplanar) 120° phases. The pitch vector of the spiral phase obtained from the unrestricted Hartree-Fock approximation is substantially renormalized in presence of electronic correlations, and the Néel phase is stabilized in a wide regime of the phase diagram, i.e., for t'/t < 0.75. We discuss these results in the context of organic charge-transfer salts.
description: 6 pages, 6 figures
The coprescribing of opioids and benzodiazepines in the Texas Medicaid adult population
Creators: name: Ibrahim, Kemi Rashedat
name: 0000-0002-1945-8754
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Opioid
Coprescribing
Concomitant
Concurrent
Benzodiazepine
Medicaid
Texas Medicaid

description: Coprescribing of opioids and benzodiazepines is associated with opioid abuse, misuse, and overdose. Although clinical guidelines caution against coprescribing of opioids and benzodiazepines, the practice is increasing. Medicaid enrollees are disproportionately affected by the opioid epidemic. Thus, the aim of this study is to evaluate coprescribing of opioids and benzodiazepines in Texas Medicaid adult enrollees receiving opioid therapy. Texas Medicaid paid prescriptions claims data from July 1, 2013 to June 30, 2017 were analyzed retrospectively. Patients aged 18-64 years old on oral opioid therapy were included in this study. The dependent variables were coprescribing status and total number of coprescribing days. Coprescribing was defined as >=14 days of overlapping opioid and benzodiazepine prescriptions. A total of 328,113; 312,398; 286,095; and 277,795 enrollees were included in the study for years 1, 2, 3, and 4, respectively. Prevalence of coprescribing decreased from 10.9% in year 1 to 10.8%, 10.2%, and 9.2% in years 2, 3, and 4, respectively. Results of logistic regression analyses showed that enrollees who are older, female, had a higher average daily prescribed dose and a higher number of months with any prescription claim, that filled their prescription in a rural area, and had a prescription from a primary care physician were more likely to experience coprescribing. Results of Zero-Inflated Negative Binomial (ZINB) regression showed that the total coprescribing days were 2 to 3% higher for males than for females. Geographical variations were found in rates of coprescribing across the four years of data. For instance, year 1 had 2 regions (Northwest and Southeast Texas) with coprescribing rates greater than 1,400 per 100,000 enrollees while year 4 had no region with coprescribing rates greater than 1,400 per 100,000 enrollees. Across the four years of data, short-acting hydrocodone and alprazolam was the most frequently prescribed combination followed by short-acting hydrocodone and clonazepam for years 1 and 2 and short-acting tramadol and alprazolam for years 3 and 4. Although a slight decreasing trend was identified, coprescribing continues for Texas Medicaid enrollees despite the known risks of the combination of opioids and benzodiazepines. Hence, strategies to reduce coprescribing should be implemented.
Carleman estimates and observability inequalities for parabolic equations with interior degeneracy
Creators: name: Fragnelli, Genni
name: Mugnai, Dimitri
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We consider a parabolic problem with degeneracy in the interior of the spatial domain, and we focus on controllability results through Carleman estimates for the associated adjoint problem. The novelty of the present paper is that the degeneracy is also in the interior of the control region, so that no previous result can be adapted to this situation.
description: 40 pages
Deviating band symmetries and many-body interactions in a model hole doped iron pnictide superconductor
Creators: name: Wray, L. A.
name: Thomale, R.
name: Platt, C.
name: Hsieh, D.
name: Qian, D.
name: Chen, G. F.
name: Luo, J. L.
name: Wang, N. L.
name: Hasan, M. Z.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a polarization resolved study of the low energy band structure in the optimally doped iron pnictide superconductor Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ (T$_c$=37K) using angle resolved photoemission spectroscopy. Polarization-contrasted measurements are used to identify and trace all three low energy hole-like bands predicted by local density approximation (LDA) calculations. The photoemitted electrons reveal an inconsistency with LDA-predicted symmetries along the $Γ$-X high symmetry momentum axis, due to unexpectedly strong rotational anisotropy in electron kinetics. We evaluate many-body effects such as Mott-Hubbard interactions that are likely to underlie the anomaly, and discuss how the observed deviations from LDA band structure affect the energetics of iron pnictide Cooper pairing in the hole doped regime.
description: 7.1 pages, 5 figures. Symmetry analysis revised. Accepted for publication in Phys. Rev. B
Fixed point theorem for reflexive Banach spaces and uniformly convex non positively curved metric spaces
Creators: name: Oppenheim, Izhar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F65

description: This article generalizes the work of Ballmann and Światkowski to the case of Reflexive Banach spaces and uniformly convex Busemann spaces, thus giving a new fixed point criterion for groups acting on simplicial complexes.
Disguising quantum channels by mixing and channel distance trade-off
Creators: name: Fung, Chi-Hang Fred
name: Chau, H. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the reverse problem to the distinguishability of two quantum channels, which we call the disguising problem. Given two quantum channels, the goal here is to make the two channels identical by mixing with some other channels with minimal mixing probabilities. This quantifies how much one channel can disguise as the other. In addition, the possibility to trade off between the two mixing probabilities allows one channel to be more preserved (less mixed) at the expense of the other. We derive lower- and upper-bounds of the trade-off curve and apply them to a few example channels. Optimal trade-off is obtained in one example. We relate the disguising problem and the distinguishability problem by showing the the former can lower and upper bound the diamond norm. We also show that the disguising problem gives an upper bound on the key generation rate in quantum cryptography.
description: 27 pages, 8 figures. Added new results for using the disguising problem to lower and upper bound the diamond norm and to upper bound the key generation rate in quantum cryptography
Nanowire sharpening : application to field ionization
Creators: name: Leviyev, Alex
name: 0000-0003-4168-2602
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Nanowire
Sharpening
Field ionization
Ionization
Silicon

description: Nanowires show potential for a wide range of fields, from developing next generation solar cells, to detecting viruses, to field ionizing gasses. Their uses in such disparate fields are due to the extreme flexibility in which nanowires can be manufactured and customized to order. The heart of a nanowire, however, is it’s tip. Here surface charges accumulates in extreme densities when the wire is biased, consequently producing large electric fields that are then used in creative ways for exciting applications. My aim for this thesis is three-fold. First, I intend to establish a context for nanowires. Why were these structures studied in the first place? What are some exciting application areas? What makes nanowires unique? Etc... This will set the stage for subsequent sections, and provide the salt and pepper that will make the main course more flavorful. The second is to present an overview of relevant results from the literature that I will later build upon. There are analytical models of varying complexity examining the type of protrusions we are interested in here, as well as numerous numerical studies. We will look at them to get a deeper intuition for whats happening, and use them as a basis for comparison later on. Finally, I will present my results and discuss their consequences. As we will see, sharpening a cylindrical-post nanowire of height H = 1um, starting radius of curvature r₀ = 100nm, and base size b = 2 · r₀ = 200nm can enhance the field further by an order of 100. In addition, the dielectrophoretic (DEP) force present due to strong electric field gradients can significantly alter cooled gas beam trajectories towards the nanowire tips. Non-cooled gas beams also display room temperature trajectory deviations for species with large polarizability to mass ratios. This leads to the conclusion that at lower temperatures (and even at room temperature) the field ionization cross section of a nanowire array is significantly increased under certain conditions when taking into account DEP coupling.
Distance-Redshift Relations in an Anisotropic Cosmological Model
Creators: name: Menezes, R. S.
name: Pigozzo, C.
name: Carneiro, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we study an anisotropic model generated from a particular Bianchi type-III metric, which is a generalization of Gödel's metric and an exact solution of Einstein's field equations. We analyse type Ia supernova data, namely the SDSS sample calibrated with the MLCS2k2 fitter, and we verify in which ranges of distances and redshifts the anisotropy could be observed. We also consider, in a joint analysis, the position of the first peak in the CMB anisotropy spectrum, as well as current observational constraints on the Hubble constant. We conclude that a small anisotropy is permitted by the data, and that more accurate measurements of supernova distances above z = 2 might indicate the existence of such anisotropy in the universe.
description: Revised version, to appear in JCAP
ENT 601 Manobras retóricas e falácias
Creators: name: DeSouza, Og
Publisher: name: Zenodo
Year: 2023
Subjects: falácias
retórica

description: Esta é uma aula da disciplina ENT 601 Natureza da Pesquisa e Pós-graduação, ministrada primariamente à pós-graduação stricto sensu em Entomologia, na Universidade Federal de Viçosa. Ao final desta aula você será capaz de refutar aquelas tentativas de convencimento que, ao invés de se basearem em argumentos logicamente estruturados, baseiam-se em pseudo-raciocínios que se valem do apelo à emoção de sutis (e deliberados!) erros de lógica, nos quais as premissas não levam à conclusão
Confined ionic liquids films under shear: The importance of the chemical nature of the solid surface
Creators: name: Bernardino, Kalil
name: Ribeiro, Mauro C. C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Ionic liquids have generated interest in applications as lubricants and as additives to conventional lubricants due to their unique physical properties. In these applications, the liquid thin film can be subjected simultaneously to extremely high shear and loads in addition to nanoconfinement effects. Here, we use molecular dynamics simulations with a coarse grained model to study a nanometric film of an ionic liquid confined between two planar solid surfaces both at equilibrium and at several shear rates. The strength of the interaction between the solid surface and the ions was changed by simulating three different surfaces with enhanced interactions with different ions. The increase of the interaction with either the cation or the anion leads to the formation of a solid-like layer that moves alongside the substrates, but this layer can exhibit different structures and stability. An increase in interaction with the high symmetry anion produces a more regular structure that is more resistant to the effects of shear and viscous heating. Two definitions were proposed and used for the calculation of the viscosity: a local definition based on microscopic characteristics of the liquid and an engineering definition based on the forces measured at the solid surfaces, with the former displaying a correlation with the layered structure induced by the surfaces. Because of the shear thinning behavior of the ionic liquids as well as the temperature rise brought on by viscous heating, both the engineering and the local viscosities decrease as the shear rate increases.
description: 32 pages, 8 figures
Observer coverage of the 2013 Gulf of Mexico skimmer trawl fishery
Creators: name: Pulver, Jeffrey R.
name: Scott-Denton, Elizabeth
name: Williams, Jo A.
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southeast Fisheries Science Center, Galveston Laboratory
Year: 2014
Subjects: subject: Trawls and trawling--Mexico, Gulf of--Management
subject: Shrimp fisheries--Mexico, Gulf of--Management
subject: Bycatches (Fisheries)--Mexico, Gulf of--Management
subject: Turtle excluder devices--Mexico, Gulf of

description: The specific objectives of this paper are to: 1) summarize trip, vessel, environmental, and gear characteristics; 2) quantify fish and protected species captures ; and 3) estimate catch per unit of effort (CPUE) trends and spatial distribution for target and nontarget species, excluding protected species. (Introduction)