cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Finite groups of arbitrary deficiency
Creators: name: Gardam, Giles
Publisher: name: arXiv
Year: 2017
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F05 (Primary), 20D15, 32J27 (Secondary)

description: The deficiency of a group is the maximum over all presentations for that group of the number of generators minus the number of relators. Every finite group has non-positive deficiency. We show that every non-positive integer is the deficiency of a finite group -- in fact, of a finite $p$-group for every prime $p$. This completes Kotschick's classification of the integers which are deficiencies of fundamental groups of compact Kaehler manifolds.
description: 7 pages, 1 figure; v2 minor changes, to appear in the Bulletin of the London Mathematical Society
Della Porta/Diani (2005): Social movements: An introduction
Creators: name: Seifert, Franz
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
Wave-nature and metastability of emergent crystals in chiral magnets
Creators: name: Hu, Yangfan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological spin textures emerging in magnetic materials usually appear in crystalline states. A long-standing dilemma is whether we should understand these emergent crystals as gathering particles or coupling waves, the answer of which affects almost every aspect of our understanding on the subject. Here we prove that 2-D emergent crystals with long-range order in helimagnets, such as skyrmion crystals and dipole skyrmion crystals, have a wave nature. We systematically study their equilibrium properties, metastability, and phase transition path when unstable. We show that the robustness of a skyrmion crystal derives from its metastability, and that its phase transition dynamics at low (high) magnetic field is mediated by a soft mode which breaks (maintains) its hexagonal symmetry. Different from ordinary crystals which are formed by. and breaks into atoms, emergent crystals have a new formation (destruction) mechanism: they appear from (turn to) single-Q spin-density-wave states through nonlinear mode-mode interactions.
description: 14 pages, 8 figures
On the chiral covariant approach to $ρρ$ scattering
Creators: name: Geng, Li-Sheng
name: Molina, Raquel
name: Oset, Eulogio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine in detail a recent work (D.~Gülmez, U.-G.~Meißner and J.~A.~Oller, Eur. Phys. J. C 77:460 (2017)), where improvements to make $ρρ$ scattering relativistically covariant are made. The paper has the remarkable conclusion that the $J=2$ state disappears with a potential which is much more attractive than for $J=0$, where a bound state is found. We trace this abnormal conclusion to the fact that an "on-shell" factorization of the potential is done in a region where this potential is singular and develops a large discontinuous and unphysical imaginary part. A method is developed, evaluating the loops with full $ρ$ propagators, and we show that they do not develop singularities and do not have an imaginary part below threshold. With this result for the loops we define an effective potential, which when used with the Bethe-Salpeter equation provides a state with $J=2$ around the energy of the $f_2(1270)$. In addition, the coupling of the state to $ρρ$ is evaluated and we find that this coupling and the $T$ matrix around the energy of the bound state are remarkably similar to those obtained with a drastic approximation used previously, in which the $q^2$ terms of the propagators of the exchanged $ρ$ mesons are dropped, once the cut-off in the $ρρ$ loop function is tuned to reproduce the bound state at the same energy.
description: 11 pages, 11 figures, version appeared in Chinese Physics C
Pelinka/Plasser (Hg.) (2007): Europäisch Denken und Lehren. Festschrift für Heinrich Neisser
Creators: name: Hartleb, Florian
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
On the space of solutions of the Horava theory at the kinetic-conformal point
Creators: name: Bellorin, Jorge
name: Restuccia, Alvaro
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The nonprojectable Horava theory at the kinetic-conformal point is defined by setting a specific value of the coupling constant of the kinetic term of the Lagrangian. This formulation has two additional second class-constraints that eliminate the extra mode. We show that the space of solutions of this theory in the Hamiltonian formalism is bigger than the space of solutions in the original Lagrangian formalism. In the Hamiltonian formalism there are certain configurations for the Lagrange multupliers that lead to solutions that cannot be found in the original Lagrangian formulation. We show specific examples in vacuum and with a source. The solution with the source has homogeneous and isotropic spatial hypersurfaces. The enhancement of the space of solutions leaves the possibility that new solutions applicable to cosmology, or to other physical systems, can be found in the Hamiltonian formalism.
description: v3: Eqs. (2.7), (3.9) and (3.10) have been corrected, with no consequences on the main results. Some references added, some typos corrected
Pelinka (2005): Demokratie in Indien. Subhas Chandra Bose und das Werden der politischen Kultur.
Creators: name: Fink, Marcel
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
Tesi di laurea "Resilienza urbana al cambiamento climatico. Nuovi metodi per l'analisi e il progetto"
Creators: name: Guerri, Giulia
Publisher: name: Zenodo
Year: 2018
Subjects: urban climate
climate change
land surface temperature
sky view factor
urban aspect ratio

description: Tesi di laurea di Giulia Guerri dal titolo "Resilienza urbana al cambiamento climatico. Nuovi metodi per l'analisi e il progetto", discussa presso il corso di laurea magistrale in pianificazione territoriale, urbanistica e ambientale dell'Università di Firenze. La tesi si inquadra all’interno del progetto PRIN, progetto di ricerca di rilevante interesse nazionale ( "Adaptive design e innovazioni tecnologiche per la rigenerazione resiliente dei distretti urbani in regime di cambiamento climatico") e si avvale della correlazione del ricercatore Alfonso Crisci dell'Istituto per la BioEconomia del Consiglio Nazionale delle Ricerche. Ulteriori informazioni a questo link: https://www.cnr.it/it/news/8266/una-challenge-per-la-biometeorologia-cnr-rendere-vivibile-e-piu-resiliente-il-clima-urbano
Feministische Interventionen in Krieg, Un/Sicherheit und Gewalt
Creators: name: Richter-Montpetit, Melanie
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Review Essay zu: Cockburn, Cynthia (2007). From Where We Stand. War, Women’s Activism and Feminist Analysis, London: Zed Books, 288 S., 23,99 EUR. Eisenstein, Zillah (2007). Sexual Decoys. Gender, Race and War in Imperial Democracy, London: Zed Books, 256 S., 19,99 EUR. Hunt, Krista/Kim Rygiel (Hg.) (2007). (En)Gendering the War on Terror. War Stories and Camouflaged Politics, London: Ashgate [2006 als hardcover], 234 S., 35,99 EUR. Puar, Jasbir K. (2008). Terrorist Assemblages. Homonationalism in Queer Times, Durham and London: Duke University Press [2007 als hardcover], 335 S., 18,99 EUR.
description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
Symbolic-Numeric Integration of the Dynamical Cosserat Equations
Creators: name: Lyakhov, Dmitry
name: Gerdt, Vladimir
name: Weber, Andreas
name: Michels, Dominik
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We devise a symbolic-numeric approach to the integration of the dynamical part of the Cosserat equations, a system of nonlinear partial differential equations describing the mechanical behavior of slender structures, like fibers and rods. This is based on our previous results on the construction of a closed form general solution to the kinematic part of the Cosserat system. Our approach combines methods of numerical exponential integration and symbolic integration of the intermediate system of nonlinear ordinary differential equations describing the dynamics of one of the arbitrary vector-functions in the general solution of the kinematic part in terms of the module of the twist vector-function. We present an experimental comparison with the well-established generalized alpha-method illustrating the computational efficiency of our approach for problems in structural mechanics.
description: 12 pages, 2 figures. arXiv admin note: text overlap with arXiv:1610.03369
„Maidens in Need of Rescue“ – US Kriegserklärungen von Laura Bush zu Jean Bethke Elshtain
Creators: name: Langenberger, Birgit
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Thema sind die diskursiven Konstruktionen von Gender im von den USA angeführten Krieg gegen Afghanistan im Kontext von Laura Bushs präsidentischer Radioansprache (Nov 2001), in der von namhaften US-Intellektuellen publizierten Erklärung der Kriegsgründe in „What we are fighting for“ (Feb 2002) und das Plädoyer für die Bombardierung im Namen der Rechte unterdrückter Frauen Afghanistans aufseiten eines Segments des USFeminismus (Jean Bethke Elshtain, Catharine A. MacKinnon; Feminist Majority Foundation). Der feministische Schulterschluss mit einem patriachalischen Imperialismus der US-Regierung reicht dabei über einen bloß strategischen Essentialismus hinaus. Deren gemeinsamer symbolischer Rahmen wird durch die moralischen Naturrechte der Amerikanischen Unabhängigkeitserklärung gebildet. Mittels dieser werden qua retrospektiver Rationalisierung die binären Oppositionen von männlich/weiblich, Kämpfer/Zivilbevölkerung, il/legitimer Krieg und Zivilisierte/Wilde erneut bestätigt. Damit ist die Ungleichheit der Geschlechter im und durch Krieg nicht nur einer ungenügenden Umsetzung von Rechten zuzuschreiben, sondern liegt auch in deren Diskursivierung und Kategorisierung begründet.
description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
Newtonian Limits of Isolated Cosmological Systems on Long Time Scales
Creators: name: Liu, Chao
name: Oliynyk, Todd A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We establish the existence of $1$-parameter families of $ε$-dependent solutions to the Einstein-Euler equations with a positive cosmological constant $Λ>0$ and a linear equation of state $p=ε^2 K ρ$, $0
description: 58 pages. Agrees with published version. Note the title has been changed. Old title "Cosmological Newtonian limits on long time scales"; New title "Newtonian Limits of Isolated Cosmological Systems on Long Time Scales"
BibTeX libraries of the PIF systematic review covering January to July 2023
Creators: name: IPB
name: Anses
Publisher: name: Zenodo
Year: 2024
Subjects: Foodborne pathogens

description: Set of BibTeX libraries corresponding to different stages of the systematic review for feeding the PIF database carried out in February 2023 to recover studies published between 01 January 2022 and 31 December 2022. The libraries are:

JanJuly2023_WithoutDups.BibTeX : Records without duplicates

JanJuly2023_Reviews.BibTeX: Relevant review papers

JanJuly2023_PapersFromReviews.BibTeX: Relevant primary studies identified from the review papers

JanJuly2023_Clean.BibTeX: Relevant primary studies for inclusion in PIF

JanJuly2023_Clean_Final.BibTeX: Relevant primary studies finally included in PIF
description: PT; BibTeX; csv; ubarron@ipb.pt
Barjols, défilé place de la Rouguière, passage du porte-bannière
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2024

Abstract
The anti-terror war in Somalia: Somali women’s multifaceted role in armed conflict
Creators: name: Teshome, Wondwosen
name: Negash, Jerusalem
Publisher: name: Austrian Journal of Political Science
Year: 2015

description: Es ist Ziel dieses Aufsatzes, den von den USA angeführten Antiterrorkrieg in Somalia zu diskutieren und seine Auswirkungen auf die Stellung und Rolle von Frauen in Somalia zu untersuchen. Mit den Anschlägen der al-Qaeda auf die Botschaften der USA in Nairobi (Kenia) und Dar es Salam (Tanzania) im August 1998 entwickelte sich islamischer Fundamentalismus und Terrorismus zu einer bedeutenden Bedrohung für die Region. Als Antwort darauf initiierten die USA in Ostafrika, insbesondere in Somalia, einen Antiterrorkrieg. Sowohl in diesem als auch im somalischen Bürgerkrieg ist die Beteiligung von Frauen bedeutsam. Bislang existiert keine umfassende Studie über die Rolle von Frauen in bewaffneten Konflikten und deren Auswirkungen auf Frauen in Somalia, einem Land, das bereits von Hungersnot, politischer Instabilität, ethnischem Krieg und geschlechterspezifischer Gewalt geprägt war. Bewaffnete Konflikte bringen neue Möglichkeiten und Zuständigkeiten im privaten wie auch im öffentlichen Bereich, durch die die sozialen Beziehungen zwischen Männern und Frauen neu definiert werden. Nach Ende des Konfliktes bestehen diese Veränderungen jedoch nicht immer fort und patriarchal dominierte Geschlechterrollen treten in vielen Gesellschaften wieder in den Vordergrund. Am Fallbeispiel Somalia geht dieser Artikel der Frage nach, warum Geschlechterrollen, die bereits vor dem Krieg existierten, nach Konflikten wieder auftauchen.
description: Austrian Journal of Political Science, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
Barjols, place de la Rouguière, porte-bannière et femmes en costume provençal
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2024

Abstract
A mean-field approach to Kondo-attractive-Hubbard model
Creators: name: Costa, N. C.
name: Lima, J. P.
name: Paiva, T. C. L.
name: ElMassalami, M.
name: Santos, R. R. dos
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: With the purpose of investigating coexistence between magnetic order and superconductivity, we consider a model in which conduction electrons interact with each other, via an attractive Hubbard on-site coupling $U$, and with local moments on every site, via a Kondo-like coupling, $J$. The model is solved on a simple cubic lattice through a Hartree-Fock approximation, within a `semi-classical' framework which allows spiral magnetic modes to be stabilized. For a fixed electronic density, $n_c$, the small $J$ region of the ground state ($T=0$) phase diagram displays spiral antiferromagnetic (SAFM) states for small $U$. Upon increasing $U$, a state with coexistence between superconductivity (SC) and SAFM sets in; further increase in $U$ turns the spiral mode into a Néel antiferromagnet. The large $J$ region is a (singlet) Kondo phase. At finite temperatures, and in the region of coexistence, thermal fluctuations suppress the different ordered phases in succession: the SAFM phase at lower temperatures and SC at higher temperatures; also, reentrant behaviour is found to be induced by temperature. Our results provide a qualitative description of the competition between local moment magnetism and superconductivity in the borocarbides family.
description: 12 pages, 12 figures
Profiling serror: Gender, Strategic logic, and emotion in the study of suicide terrorism
Creators: name: Sjoberg, Laura
name: Gentry, Caron E.
Publisher: name: Austrian Journal of Political Science
Year: 2015

description: Robert Papes viel diskutiertes Buch Dying to Win: The Strategic Logic of Suicide Terrorism (2005) zeigt deutlich die Selbstverständlichkeit eines vermeintlich geschlechtsneutralen Zugangs zur Analyse von männlichen und weiblichen SelbstmordterroristInnen. Papes Hauptargument ist, dass Selbstmordterrorismus eine durchaus rationale Strategie politischer AkteurInnen sei, der sich in Form von Kampagnen ausschließlich gegen Demokratien richte. Die Studie benennt zwar Männer wie Frauen als rationale politische Individuen bzw. AkteurInnen, betont zugleich aber bei Frauen stark den emotionalen Aspekt der Motivation. In diesem Artikel argumentieren wir, dass geschlechtsneutrale Studien wie die von Robert A. Pape nur vermeintlich geschlechtsneutral sind und gerade diese Annahme dazu führt, dass soziale und politische Dimensionen von Geschlechterordnungen ebenso wie die Vergeschlechtlichung des Sozialen und Politischen ausgeblendet werden. Darüber hinaus sagen wir, dass das Modell der Rational Choice Theorie, wie sie bei Pape eindrücklich angewendet wird, die Kluft zwischen den Geschlechtern noch vergrößert, indem „männlichen“ Werten der Vorzug gegenüber „weiblichen“ gegeben wird. Als Alternative schlagen wir eine dreifache Modifikation des Zugangs zu einer Beforschung von Selbstmordterrorismus vor, die sowohl politische als auch emotionale Motivationen inkludiert: Vergeschlechtlichte Repräsentationen von Selbstmordattentäterinnen verstärken Stereotype über Geschlecht sowie über Selbstmordterrorismus; das Ausblenden der Komplexität von Motivationen bringt die Vielfalt der Variablen, die in die Entscheidung der „MärtyrerInnen“ einfließen, nicht zum Verschwinden; und ein theoretischer Zugang, der das Emotionale in den Vordergrund stellt, könnte die Verengung des Rational Choice Ansatzes ausgleichen. Der Aufsatz schließt mit Belegen für unsere These am Beispiel der tschetschenischen „Schwarzen Witwen“, womit unsere Vorschläge als explanatorisch wertvoll diskutiert werden.
description: Austrian Journal of Political Science, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
Holographic 4-point correlators with heavy states
Creators: name: Galliani, Andrea
name: Giusto, Stefano
name: Russo, Rodolfo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The AdS/CFT duality maps supersymmetric heavy operators with conformal dimension of the order of the central charge to asymptotically AdS supergravity solutions. We show that by studying the quadratic fluctuations around such backgrounds it is possible to derive the 4-point correlators of two light and two heavy states in the supergravity approximation. We provide an explicit example in the AdS$_3$ setup relevant for the duality with the D1-D5 CFT. Contrary to previously studied examples, the supergravity correlator derived in this work differs from the result obtained at the CFT orbifold point. Our method bypasses the difficulties of applying the standard Witten's diagrams approach to correlators with operators of large conformal dimension and also avoids some technical steps that have made the computation of dynamical 4-point correlators in the AdS$_3$/CFT$_2$ context unfeasible until now.
description: 31 pages; v3: citations added, typos corrected
Fighting Women Der Einfluss von Entwicklungen am militärischen Arbeitsmarkt auf Geschlechterideologien am Beispiel USA
Creators: name: Stachowitsch, Saskia
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Forschungen zu Krieg und Geschlecht werden oftmals von Begrifflichkeiten wie „Subjektivität“, „Identität“, „Konstruktion“ und „symbolische Repräsentation“ angeleitet (Seifert 1996; 2003; Cockburn 1998). Strukturen, Institutionen, sozioökonomische Verhältnisse – kurzum: die materiellen Grundlagen von Gesellschaft – werden kaum systematisch in die Analyse einbezogen. Dieser Beitrag überprüft die Hypothese, dass der Wandel militärischer Geschlechterideologien auf materielle Faktoren zurückzuführen ist, insbesondere auf Veränderungen geschlechtsspezifischer Arbeitsteilung im militärischen und zivilen Bereich, die Folgen von Technologisierung und Spezialisierung von Ökonomie und Kriegsführung sind. Dies geschieht anhand einer theoriegeleiteten, exemplarischen Untersuchung der Darstellung von US-Soldatinnen in The New York Times in den Jahren 1990 bis 2005.
description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
Half-range lattice Boltzmann models for the simulation of Couette flow using the Shakhov collision term
Creators: name: Ambrus, Victor E.
name: Sofonea, Victor
Publisher: name: arXiv
Year: 2017
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The three-dimensional Couette flow between parallel plates is addressed using mixed lattice Boltzmann models which implement the half-range and the full-range Gauss-Hermite quadratures on the Cartesian axes perpendicular and parallel to the walls, respectively. The ability of our models to simulate rarefied flows are validated through comparison against previously reported results obtained using the linearized Boltzmann-BGK equation for values of the Knudsen number (Kn) up to $100$. We find that recovering the non-linear part of the velocity profile (i.e., its deviation from a linear function) at ${\rm Kn} \gtrsim 1$ requires high quadrature orders. We then employ the Shakhov model for the collision term to obtain macroscopic profiles for Maxwell molecules using the standard $μ\sim T^ω$ law, as well as for monatomic Helium and Argon gases, modeled through ab-initio potentials, where the viscosity is recovered using the Sutherland model. We validate our implementation by comparison with DSMC results and find excellent match for all macroscopic quantities for ${\rm Kn} \lesssim 0.1$. At ${\rm Kn} \gtrsim 0.1$, small deviations can be seen in the profiles of the diagonal components of the pressure tensor, the heat flux parallel to the plates, and the velocity profile, as well as in the values of the velocity gradient at the channel center. We attribute these deviations to the limited applicability of the Shakhov collision model for highly out of equilibrium flows.
description: 22 pages, 10 figures, 8 tables
Feministische Perspektiven zu Anti/Terror/Kriegen. Eine Einleitung
Creators: name: Brunner, Claudia
name: Eichler, Maya
name: Purkarthofer, Petra
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 2 (2008): Feministische Perspektiven zu Anti/Terror/Kriegen
A characterization of postcritically minimal Newton maps of complex exponential functions
Creators: name: Mamayusupov, Khudoyor
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 30D05, 37F10

description: We obtain a unique, canonical one-to-one correspondence between the space of marked postcritically finite Newton maps of polynomials and the space of postcritically minimal Newton maps of entire maps that take the form $p(z) \text{exp}(q(z))$ for $p(z)$, $q(z)$ polynomials and $\text{exp}(z)$, the complex exponential function. This bijection preserves the dynamics and embedding of Julia sets and is induced by a surgery tool developed by Haïssinsky.
description: Final version with changed title
Ivanov (2007): Alexander Dugin und die rechtsextremen Netzwerke. Fakten und Hypothesen zu den internationalen Verflechtungen der russischen neuen Rechten
Creators: name: Höllwerth, Alexander
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Sachs equations for light bundles in a cold plasma
Creators: name: Schulze-Koops, Karen
name: Perlick, Volker
name: Schwarz, Dominik J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the propagation of light bundles in non-empty spacetime, as most of the Universe is filled by baryonic matter in the form of a (dilute) plasma. Here we restrict to the case of a cold (i.e., pressureless) and non-magnetised plasma. Then the influence of the medium on the light rays is encoded in the spacetime dependent plasma frequency. Our result for a general spacetime generalises the Sachs equations to the case of a cold plasma Universe. We find that the reciprocity law (Etherington theorem), the relation that connects area distance with luminosity distance, is modified. Einstein's field equation is not used, i.e., our results apply independently of whether or not the plasma is self-gravitating. As an example, our findings are applied to a homogeneous plasma in a Robertson-Walker spacetime. We find small modifications of the cosmological redshift of frequencies and of the Hubble law.
description: minor reformulations; 26 pages, 3 figures
Neumayr (Hg.) (2007): Kritik der Gefühle. Feministische Positionen
Creators: name: Jarosch, Monika
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Defining the Pose of any 3D Rigid Object and an Associated Distance
Creators: name: Brégier, Romain
name: Devernay, Frédéric
name: Leyrit, Laetitia
name: Crowley, James
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Metric Geometry (math.MG)
subject: Classical Physics (physics.class-ph)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The pose of a rigid object is usually regarded as a rigid transformation, described by a translation and a rotation. However, equating the pose space with the space of rigid transformations is in general abusive, as it does not account for objects with proper symmetries -- which are common among man-made objects.In this article, we define pose as a distinguishable static state of an object, and equate a pose with a set of rigid transformations. Based solely on geometric considerations, we propose a frame-invariant metric on the space of possible poses, valid for any physical rigid object, and requiring no arbitrary tuning. This distance can be evaluated efficiently using a representation of poses within an Euclidean space of at most 12 dimensions depending on the object's symmetries. This makes it possible to efficiently perform neighborhood queries such as radius searches or k-nearest neighbor searches within a large set of poses using off-the-shelf methods. Pose averaging considering this metric can similarly be performed easily, using a projection function from the Euclidean space onto the pose space. The practical value of those theoretical developments is illustrated with an application of pose estimation of instances of a 3D rigid object given an input depth map, via a Mean Shift procedure.
Notes on JSON-LD implementation for documenting ECRR resources
Creators: name: Richard, Stephen M.
name: Geocodes Team
Publisher: name: Zenodo
Year: 2022
Subjects: metadata
cross domain
documentation
EarthCube
GeoCODES
resource registry

description: This is a description of the EarthCube Resource Registry metadata schema for describing a variety of information resources useful for geoscience research and data management. The document first discusses the fields in the schema that apply to all resources, followed by a section that documents metadata fields and conventions specific to the various resource types in the scope of the resource registry. In each section, the mandatory fields are described first, highlighted in red. Other fields are described in alphabetic order by name. A final section describes some general implementation patterns used in the JSON LD encoding. 
Nikolai Genov/Reinhard Kreckel (Hg.) (2007): Soziologische Zeitgeschichte. Helmut Steiner zum 70. Geburtstag
Creators: name: Segert, Dieter
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Zürn/Joerges (Hg.) (2005): Law and governance in postnational Europe. Compliance beyond the nation-state
Creators: name: Slominski, Peter
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Beckert/Ebbinghaus/Hassel/Manow (Hg.) (2006): Transformationen des Kapitalismus. Festschrift für Wolfgang Streeck zum sechzigsten Geburtstag
Creators: name: Altenhof, Ralf
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Spin-Wave Modes in Transition from a Thin Film to a Full Magnonic Crystal
Creators: name: Langer, Manuel
name: Gallardo, Rodolfo A.
name: Schneider, Tobias
name: Stienen, Sven
name: Roldán-Molina, Alejandro
name: Yuan, Ye
name: Lenz, Kilian
name: Lindner, Jürgen
name: Landeros, Pedro
name: Fassbender, Jürgen
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin-wave modes are studied under the gradual transition from a flat thin film to a 'full' (one-dimensional) magnonic crystal. For this purpose, the surface of a pre-patterned 36.8 nm thin permalloy film was sequentially ion milled resulting in magnonic hybrid structures, referred to as surface-modulated magnonic crystals, with increasing modulation depth. After each etching step, ferromagnetic resonance measurements were performed yielding the spin-wave resonance modes in backward-volume and Damon-Eshbach geometry. The spin-wave spectra of these hybrid systems reveal an even larger variety of spin-wave states compared to the 'full' magnonic crystal. The measurements are corroborated by quasi-analytical theory and micromagnetic simulations in order to study the changing spin-wave mode character employing spin-wave mode profiles. In backward-volume geometry, a gradual transition from the uniform mode in the film limit to a fundamental mode in the thin part of the magnonic crystal was observed. Equivalently, the first and the second film modes are transform into a center and an edge mode of the thick part of the magnonic crystal. Simple transition rules from the $n^{\mathrm{th}}$ film mode to the $m^{\mathrm{th}}$ mode in the 'full' magnonic crystal are formulated unraveling the complex mode structure particularly in the backward-volume geometry. An analogous analysis was performed in the Damon-Eshbach geometry.
Plasser/Ulram (Hg.) (2007): Wechselwahlen. Analysen zur Nationalratswahl 2006
Creators: name: Sickinger, Hubert
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
IT Research Support
Creators: name: Kievits, Paul
Publisher: name: Rotterdam School of Management, Erasmus University Rotterdam
Year: 2024
Subjects: research support
working with data
software development

description: Are you trying to collect and structure data, but don’t want to do it all by hand? Does your research require custom software? Or is an IT-problem somehow hindering your research?The Research Software Engineering Consulting (RSEC) team, part of the RSM Digitalisation Information Services (RDIS) department, can help with all your research related problems that require specialised software or hardware solutions.
Dachs/Gerlich/Gottweis/Kramer/Lauber/Müller/Tálos (Hg.) (2006): Politik in Österreich. Das Handbuch
Creators: name: Sandner, Günther
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Electron trajectories and magnetotransport in nanopatterned graphene under commensurability conditions
Creators: name: Power, Stephen R.
name: Thomsen, Morten Rishøj
name: Jauho, Antti-Pekka
name: Pedersen, Thomas Garm
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Commensurability oscillations in the magnetotransport of periodically patterned systems, emerging from the interplay of cyclotron orbit and the pattern periodicity, are a benchmark of mesoscopic physics in electron gas systems. Exploiting similar effects in 2D materials would allow exceptional control of electron behaviour, but is hindered by the requirement to maintain ballistic transport over large length scales. Recent experiments have overcome this obstacle and observed distinct magnetoresistance commensurability peaks for perforated graphene sheets (antidot lattices). Interpreting the exact mechanisms behind these peaks is of key importance, particularly in graphene where a range of regimes are accessible by varying the electron density. In this work a fully atomistic, device-based simulation of magnetoresistance experiments allows us to analyse both the resistance peaks and the current flow at commensurability conditions. Magnetoresistance spectra are found in excellent agreement with experiment, but we show that a semi-classical analysis, in terms of simple skipping or pinned orbits, is insufficient to fully describe the corresponding electron trajectories. Instead, a generalised mechanism in terms of states bound to individual antidots, or to groups of antidots, is required. Commensurability features are shown to arise when scattering between such states is enhanced. The emergence and suppression of commensurability peaks is explored for different antidot sizes, magnetic field strengths and electron densities. The insights gained from our study will guide the design and optimization of future experiments with nanostructured graphene.
Analysis of the $Λ_c(2860)$, $Λ_c(2880)$, $Ξ_c(3055)$ and $Ξ_c(3080)$ as D-wave baryon states with QCD sum rules
Creators: name: Wang, Zhi-Gang
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we tentatively assign the $Λ_c(2860)$, $Λ_c(2880)$, $Ξ_c(3055)$ and $Ξ_c(3080)$ to be the D-wave baryon states with the spin-parity $J^P={\frac{3}{2}}^+$, ${\frac{5}{2}}^+$, ${\frac{3}{2}}^+$ and ${\frac{5}{2}}^+$, respectively, and study their masses and pole residues with the QCD sum rules in a systematic way by constructing three-types interpolating currents with the quantum numbers $(L_ρ,L_λ)=(0,2)$, $(2,0)$ and $(1,1)$, respectively. The present predictions favor assigning the $Λ_c(2860)$, $Λ_c(2880)$, $Ξ_c(3055)$ and $Ξ_c(3080)$ to be the D-wave baryon states with the quantum numbers $(L_ρ,L_λ)=(0,2)$ and $J^P={\frac{3}{2}}^+$, ${\frac{5}{2}}^+$, ${\frac{3}{2}}^+$ and ${\frac{5}{2}}^+$, respectively. While the predictions for the masses of the $(L_ρ,L_λ)=(2,0)$ and $(1,1)$ D-wave $Λ_c$ and $Ξ_c$ states can be confronted to the experimental data in the future.
description: 26 pages, 25 figures
Die Relevanz eines kommunalen Datenmanagements auf strategischer, prozessualer und technischer Ebene
Creators: name: Förster, André
Publisher: name: Zenodo
Year: 2024
Subjects: Bildungsmonitoring
Bildungsmanagement
Datenmanagement
Data Management
Datenlebenszyklus
Data Lifecycle
Bildungsdatenmanagement
Bildungssteuerung
Data Governance
Datenstrategie
Prozessmodell
Integrierte Planung
Datenbasiertes Kommunales Bildungsmanagement
DKBM
Transferinitiative Kommunales Bildungsmanagement
Fachnetzwerk für kommunales Bildungsmanagement

description: Präsentation im Themenworkshop "Datenmanagement im Bildungsbereich - vorhandene Software bedarfsorientiert und flexibel nutzen" der Transferagentur Nord-Ost am 08. Juni 2023
Bauböck/Ersbøll/Groenendijk/Waldrauch (Hg.) (2006): Acquisition and loss of nationality. Policies and trends in 15 European states
Creators: name: Oberlechner, Manfred
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
On the commutator subgroup of a right-angled Artin group
Creators: name: Panov, Taras
name: Veryovkin, Yakov
Publisher: name: arXiv
Year: 2017
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 20F65, 20F12, 57M07

description: We use polyhedral product models to analyse the structure of the commutator subgroup of a right-angled Artin group. In particular, we provide a minimal set of generators for the commutator subgroup, consisting of special iterated commutators of canonical generators.
description: 12 pages. The last section expanded in v.2
Anti-de Sitter Space from Optimization of Path Integrals in Conformal Field Theories
Creators: name: Caputa, Pawel
name: Kundu, Nilay
name: Miyaji, Masamichi
name: Takayanagi, Tadashi
name: Watanabe, Kento
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a new optimization procedure for Euclidean path integrals which compute wave functionals in conformal field theories (CFTs). We optimize the background metric in the space on which the path integration is performed. Equivalently this is interpreted as a position-dependent UV cutoff. For two-dimensional CFT vacua, we find the optimized metric is given by that of a hyperbolic space and we interpret this as a continuous limit of the conjectured relation between tensor networks and Anti--de Sitter (AdS)/conformal field theory (CFT) correspondence. We confirm our procedure for excited states, the thermofield double state, the Sachdev-Ye-Kitaev model and discuss its extension to higher-dimensional CFTs. We also show that when applied to reduced density matrices, it reproduces entanglement wedges and holographic entanglement entropy. We suggest that our optimization prescription is analogous to the estimation of computational complexity.
description: 7 pages, Revtex, 2 figures, Version 2 : The version published in PRL, title expanded and typos corrected
On the difference between Poincaré and Lorentz gravity
Creators: name: Lu, Jia-An
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Poincaré invariance of GR is usually interpreted as Lorentz invariance plus diffeomorphism invariance. In this paper, by introducing the local inertial coordinates (LIC), it is shown that a theory with Lorentz and diffeomorphism invariance is not necessarily Poincaré invariant. Actually, the energy-momentum conservation is violated there. On the other hand, with the help of the LIC, the Poincaré invariance is reinterpreted as an internal symmetry. In this formalism, the conservation law is derived, which has not been sufficiently explored before.
description: 11 pages
Zitadelle „virtueller Nationalstaat“: Die Europäische Union und die Politik interner Schließung europäischer Einwanderungsländer
Creators: name: Birsl, Ursula
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: Nach dem Amsterdamer Vertrag und dem Tampere Programm von 1999 sollte in der EU bis 2004 ein Konzept für eine gemeinschaftliche Migrations- und Asylpolitik verabschiedet sein. Dieses Vorhaben ist gescheitert, obwohl die Voraussetzungen günstig erschienen: Die Migrationsregime der EU-15 hatten sich einander angeglichen und in einigen Ländern mehrten sich bereits seit den neunziger Jahren Anzeichen, die Migrationspolitik wieder offener zu gestalten. Eine genauere Betrachtung der inneren Verfasstheit der Migrationsgesellschaften offenbart jedoch eine differenzierte Situation in der Einwanderungsregion Westeuropa, und die Migrationspolitik der Einwanderungsländer scheint auf den ersten Blick einer widerstreitenden Logik zwischen externer Öffnung und interner Schließung gegenüber Migration zu folgen. In dem Beitrag soll auf der Grundlage eines Vergleichs der 15 alten EULänder diese widerstreitende Logik näher beleuchtet und untersucht werden, ob sich dahinter die Strategie verbirgt, einer Denationalisierung – im Prozess der europäischen Integration – eine Politik der Renationalisierung entgegenzusetzen. Es wird argumentiert, dass sich hier Grundzüge eines politischen Konzepts von Zitadellen aus „virtuellen Nationalstaaten“ in der „Festung Europa“ erkennen lassen. Dieses Konzept wirkt dem Bedarf an Einwanderung ebenso entgegen, wie es der europäischen Integration Grenzen setzt.
description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Learning Concept Embeddings for Efficient Bag-of-Concepts Densification
Creators: name: Shalaby, Walid
name: Zadrozny, Wlodek
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Explicit concept space models have proven efficacy for text representation in many natural language and text mining applications. The idea is to embed textual structures into a semantic space of concepts which captures the main ideas, objects, and the characteristics of these structures. The so called Bag of Concepts (BoC) representation suffers from data sparsity causing low similarity scores between similar texts due to low concept overlap. To address this problem, we propose two neural embedding models to learn continuous concept vectors. Once they are learned, we propose an efficient vector aggregation method to generate fully continuous BoC representations. We evaluate our concept embedding models on three tasks: 1) measuring entity semantic relatedness and ranking where we achieve 1.6% improvement in correlation scores, 2) dataless concept categorization where we achieve state-of-the-art performance and reduce the categorization error rate by more than 5% compared to five prior word and entity embedding models, and 3) dataless document classification where our models outperform the sparse BoC representations. In addition, by exploiting our efficient linear time vector aggregation method, we achieve better accuracy scores with much less concept dimensions compared to previous BoC densification methods which operate in polynomial time and require hundreds of dimensions in the BoC representation.
Programmatische Konvergenz innerhalb der westeuropäischen Parteienfamilien? Ein Vergleich von christ- und sozialdemokratischen Parteien in Europa
Creators: name: Franzmann, Simon
Publisher: name: Österreichische Zeitschrift für Politikwissenschaft
Year: 2015

description: In der Literatur wird vergleichsweise selten erörtert, wie die Europäisierung indirekt den Handlungsspielraum der nationalstaatlich agierenden Parteien einschränkt. Vor allem ist noch nicht untersucht worden, ob sich die Parteien einer Familie grenzübergreifend ähnlicher werden. Diese Lücke soll hier mit einer Untersuchung der christ- und sozialdemokratischen Parteienfamilie für acht Länder untersucht werden. Dies wird im Beitrag auf der Basis der Wahlprogrammdaten des Comparative Manifesto Projects im Hinblick auf ihre Kernthemen, im Hinblick auf die programmatische Übereinstimmung jenseits ideologischer Überlegungen anhand eines Ähnlichkeitsindices und schließlich im Hinblick auf die ideologischen Links-Rechts-Positionen untersucht. Letzteres erfolgt getrennt für eine allgemeine, für eine ökonomische und eine gesellschaftspolitische Links-Rechts-Skala. Im Ergebnis zeigt sich ein Konvergenztrend sowohl innerhalb als auch zwischen den Parteienfamilien. Dieser Konvergenztrend ist am ausgeprägtesten für die grundsätzliche Ähnlichkeit der Wahlprogramme sowie der gesellschaftspolitischen Links-Rechts-Skala.
description: Österreichische Zeitschrift für Politikwissenschaft, Bd. 37 Nr. 1 (2008): Vergleichende Parteienforschung. Trends und Probleme
Anomalies and entanglement renormalization
Creators: name: Bridgeman, Jacob C.
name: Williamson, Dominic J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study 't Hooft anomalies of discrete groups in the framework of (1+1)-dimensional multiscale entanglement renormalization ansatz states on the lattice. Using matrix product operators, general topological restrictions on conformal data are derived. An ansatz class allowing for optimization of MERA with an anomalous symmetry is introduced. We utilize this class to numerically study a family of Hamiltonians with a symmetric critical line. Conformal data is obtained for all irreducible projective representations of each anomalous symmetry twist, corresponding to definite topological sectors. It is numerically demonstrated that this line is a protected gapless phase. Finally, we implement a duality transformation between a pair of critical lines using our subclass of MERA.
description: 12+18 pages, 6+5 figures, 0+2 tables, v2 published version
Halo bias in Lagrangian Space: Estimators and theoretical predictions
Creators: name: Modi, Chirag
name: Castorina, Emanuele
name: Seljak, Uros
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present several methods to accurately estimate Lagrangian bias parameters and substantiate them using simulations. In particular, we focus on the quadratic terms, both the local and the non local ones, and show the first clear evidence for the latter in the simulations. Using Fourier space correlations, we also show for the first time, the scale dependence of the quadratic and non-local bias coefficients. For the linear bias, we fit for the scale dependence and demonstrate the validity of a consistency relation between linear bias parameters. Furthermore we employ real space estimators, using both cross-correlations and the Peak-Background Split argument. This is the first time the latter is used to measure anisotropic bias coefficients. We find good agreement for all the parameters among these different methods, and also good agreement for local bias with ESP$τ$ theory predictions. We also try to exploit possible relations among the different bias parameters. Finally, we show how including higher order bias reduces the magnitude and scale dependence of stochasticity of the halo field.
description: 13 pages, 12 figures