cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
$R$ parity violation from discrete $R$ symmetries
Creators: name: Chen, Mu-Chun
name: Ratz, Michael
name: Takhistov, Volodymyr
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider supersymmetric extensions of the standard model in which the usual $R$ or matter parity gets replaced by another $R$ or non-$R$ discrete symmetry that explains the observed longevity of the nucleon and solves the $μ$ problem of MSSM. In order to identify suitable symmetries, we develop a novel method of deriving the maximal $\mathbb{Z}_{N}^{(R)}$ symmetry that satisfies a given set of constraints. We identify $R$ parity violating (RPV) and conserving models that are consistent with precision gauge unification and also comment on their compatibility with a unified gauge symmetry such as the Pati-Salam group. Finally, we provide a counter-example to the statement found in the recent literature that the lepton number violating RPV scenarios must have $μ$ term and the bilinear $κ\, L \, H_u$ operator of comparable magnitude.
description: v2: references added, minor corrections; matches published version in Nucl. Phys. B
Shadowed AHP for multi-criteria supplier selection
Creators: name: El-Hawy, Mohamed Abdel Hameed
Publisher: name: arXiv
Year: 2024
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Numerous techniques of multi-criteria decision-making (MCDM) have been proposed in a variety of business domains. One of the well-known methods is the Analytical Hierarchical Process (AHP). Various uncertain numbers are commonly used to represent preference values in AHP problems. In the case of multi-granularity linguistic information, several methods have been proposed to address this type of AHP problem. This paper introduces a novel method to solve this problem using shadowed fuzzy numbers (SFNs). These numbers are characterized by approximating different types of fuzzy numbers and preserving their uncertainty properties. The new Shadowed AHP method is proposed to handle preference values which are represented by multi-types of uncertain numbers. The new approach converts multi-granular preference values into unified model of shadowed fuzzy numbers and utilizes their properties. A new ranking approach is introduced to order the results of aggregation preferences. The new approach is applied to solve a supplier selection problem in which multi-granular information are used. The features of the new approach are significant for decision-making applications.
description: 14 pages
Shear-bulk coupling in nonconformal hydrodynamics
Creators: name: Denicol, Gabriel S.
name: Florkowski, Wojciech
name: Ryblewski, Radoslaw
name: Strickland, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We compute the temporal evolution of the pressure anisotropy and bulk pressure of a massive gas using second-order viscous hydrodynamics and anisotropic hydrodynamics. We then compare our results with an exact solution of the Boltzmann equation for a massive gas in the relaxation time approximation. We demonstrate that, within second-order viscous hydrodynamics, the inclusion of the full set of kinetic coefficients, particularly the shear-bulk couplings, is necessary to properly describe the time evolution of the bulk pressure. We also compare the results of second-order hydrodynamics with those obtained using the anisotropic hydrodynamics approach. We find that anisotropic hydrodynamics and second-order viscous hydrodynamics including the shear-bulk couplings are both able to reproduce the exact evolution with comparable accuracy.
description: 23 pages, 8 figures; v2 - published version which includes some typo corrections and additional references
Entropic competition in polymeric systems under geometrical confinement
Creators: name: Azari, Arash
name: Müller-Nedebock, Kristian K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Using molecular dynamics simulation, we investigate the effect of confinement on a system that comprises several stiff segmented polymer chains where each chain has similar segments, but length and stiffness of the segments vary among the chains which makes the system inhomogeneous. The translational and orientational entropy loss due to the confinement plays a crucial role in organizing the chains which can be considered as an entropy-driven segregation mechanism to differentiate the components of the system. Due to the inhomogeneity, both weak and strong confinement regimes show the competition in the system and we see segregation of chains as the confining volume is decreased. In the case of strong spherical confinement, a chain at the periphery shows higher angular mobility than other chains, despite being more radially constrained.
description: 16 pages, 11 figures
title: Argumentative Strategien rechtspopulistischer Diskurse im Bericht der Historikerkommission der Freiheitlichen Partei Österreichs
Creators: name: Till, Joel
Year: 2021

description: Die vorliegende Arbeit untersucht den Bericht der Historikerkommission der Freiheitlichen Partei Österreichs nach den im rechtspopulistischen Diskurs üblichen argumentativen Strate-gien. Im Zentrum steht die Frage, inwiefern die Beiträge im Bericht der Historikerkommission den wissenschaftlichen Standards entsprechen und inwiefern der Bericht in seiner Gesamtheit dazu tendiert, sich als Parteipublikation zu klassifizieren, die opportunistische politische Inte-ressen verfolgt. In diesem Sinne werden diskursive Strategien, ausgrenzende Argumentationen, Relativierung von Fakten und geschichtsrevisionistische Tendenzen sichtbar gemacht. Die an den Diskurshistorischen Ansatz der Kritischen Diskursanalyse angelehnte Untersuchung der argumentativen Strategien im rechtspopulistischen Diskurs wird von einem historischen Kon-text zur Parteigeschichte des sogenannten „Dritten Lagers“ begleitet. Der historische Abriss setzt im frühen 19. Jahrhundert an und endet mit 2020.
description: This thesis analyses the Report of the Historians Committee of the Freedom Party Austria based on for right-wing-populism typical argumentative strategies. The main question is to what extend the articles in the Report of the Historians Committee correspond to scientific standards and if the report in its entirety can be classified as a mere party publication that pur-sues opportunistic political interests. By an in-depth analysis of discursive strategies, marginal-ising reasoning, relativization of facts the thesis shows the reports tendencies to historical revi-sionism. The discourse historical approach of the critical discourse analysis of argumentative strategies in right-wing populist discourse is complemented by a historical context of national-ist developments. The historical context sheds light on the period from the early 19th century until 2020.
Effective Medium Theory for Elastic Metamaterials in Thin Elastic Plates
Creators: name: Torrent, Daniel
name: Pennec, Yan
name: Djafari-Rouhani, Bahram
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An effective medium theory for resonant and non-resonant metamaterials for flexural waves in thin plates is presented. The theory provides closed-form expressions for the effective parameters of arrangement of inclusions or resonators in thin plates as a function of the filling fraction of the inclusions, their physical properties and the frequency. It is shown that positive or negative effective elastic parameters are possible depending on the symmetry of the resonance but, unlike it happens for bulk elastic waves, the responsible for the negative mass density behaviour is the monopolar term, while the negative Young's modulus and Poisson's ratio is due to the combination of monopolar and quadrupolar resonances, showing also that, at least for the first order in the scattering coefficients, the dipolar resonance plays no role in the description of the effective medium. Several examples are given for both non-resonant and resonant effective parameters and the results are verified by multiple scattering theory.
The formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution
Creators: name: Härtle, R.
name: Millis, A. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically investigate the full time evolution of a nonequilibrium double quantum dot structure from initial conditions corresponding to different product states (no entanglement between dot and lead) to a nonequilibrium steady state. The structure is described by a two-level spinless Anderson model where the levels are coupled to two leads held at different chemical potentials. The problem is solved by a numerically exact hierarchical master equation technique and the results are compared to approximate ones obtained from Born-Markov theory. The methods allow us to study the time evolution up to times of order $10^4$ of the bare hybridization time, enabling eludication of the role of the initial state on the transient dynamics, coherent charge oscillations and an interaction-induced renormalization of energy levels. We find that when the system carries a single electron on average the formation of the steady state is strongly influenced by the coherence between the dots. The latter can be sizeable and indeed larger in the presence of a bias voltage than it is in equilibrium. Moreover, the interdot coherence is shown to lead to a pronounced difference in the population of the dots.
description: 38 pages, 11 figures, revised version
DataCite: ahora y en el futuro
Creators: name: Ferreira, Veronica Gomes
name: Mejias, Gabi
Publisher: name: Zenodo
Year: 2022
Subjects: DataCite Member Meeting 2022

description: Conectando la investigación, identificando el conocimiento Veronica Gomes Ferreira & Gabriela Mejias (DataCite) Reunión Anual de Miembros de DataCite Septiembre 2022 Se puede encontrar una grabación de la presentación en: https://youtu.be/hCIOWOJ_TIg
Unveiling the universality of I-Love-Q relations
Creators: name: Sham, Y. -H.
name: Chan, T. K.
name: Lin, L. -M.
name: Leung, P. T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The recent discovery of the universal I-Love-Q relations connecting the moment of inertia, tidal deformability, and the spin-induced quadrupole moment of compact stars is intriguing and totally unexpected. In this paper, we provide numerical evidence showing that the universality can be attributed to the incompressible limit of the I-Love-Q relations. The fact that modern equations of state are stiff, with an effective adiabatic index larger than about two, above the nuclear density range is the key to establishing the universality for neutron stars and quark stars with typical compactness from about 0.1 to 0.3. On the other hand, the I-Love-Q relations of low-mass neutron stars near the minimum mass limit depend more sensitively on the underlying equation of state because these stars are composed mainly of softer matter at low densities. However, the I-Love-Q relations for low-mass quark stars can still be represented accurately by the incompressible limit. We also study the I-Love relation connecting the moment of inertia and tidal deformability analytically in Newtonian gravity and show why the I-Love-Q relation is weakly dependent on the underlying equation of state and can be attributed to its incompressible limit.
description: Minor changes to match the published version
Generalized Indices for $\mathcal{N}=1$ Theories in Four-Dimensions
Creators: name: Nishioka, Tatsuma
name: Yaakov, Itamar
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use localization techniques to calculate the Euclidean partition functions for $\mathcal{N}=1$ theories on four-dimensional manifolds $M$ of the form $S^1 \times M_3$, where $M_3$ is a circle bundle over a Riemann surface. These are generalizations of the $\mathcal{N}=1$ indices in four-dimensions including the lens space index. We show that these generalized indices are holomorphic functions of the complex structure moduli on $M$. We exhibit the deformation by background flat connections.
description: 50 pages; typos corrected, references added
Crossed surface flat bands of Weyl semimetal superconductors
Creators: name: Lu, Bo
name: Yada, Keiji
name: Sato, Masatoshi
name: Tanaka, Yukio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It has been noted that certain surfaces of Weyl semimetals have bound states forming open Fermi arcs, which are never seen in typical metallic states. We show that the Fermi arcs enable them to support an even more exotic surface state with crossed flat bands in the superconducting state. We clarify the topological origin of the crossed flat bands and the relevant symmetry that stabilizes the cross point. We also discuss their possible experimental verification by tunneling spectroscopy.
description: 5 pages for main text and 5 pages for supplementary materials
Grades of Discrimination: Indiscernibility, symmetry, and relativity
Creators: name: Button, Tim
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 00A30, 03C07, 03C40, 03A10

description: There are several relations which may fall short of genuine identity, but which behave like identity in important respects. Such grades of discrimination have recently been the subject of much philosophical and technical discussion. This paper aims to complete their technical investigation. Grades of indiscernibility are defined in terms of satisfaction of certain first-order formulas. Grades of symmetry are defined in terms of symmetries on a structure. Both of these families of grades of discrimination have been studied in some detail. However, this paper also introduces grades of relativity, defined in terms of relativeness correspondences. This paper explores the relationships between all the grades of discrimination, exhaustively answering several natural questions that have so far received only partial answers. It also establishes which grades can be captured in terms of satisfaction of object-language formulas, and draws connections with definability theory.
description: Minor changes: a table has been added to section 2 (for user reference), and the identity-free version of Beth-Svenonius in section 6 gets a slightly nicer treatment
Tearing of thin sheets: Cracks interacting through an elastic ridge
Creators: name: Brau, Fabian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the interaction between two cracks propagating quasistatically during the tearing of a thin brittle sheet. We show that the cracks attract each other following a path described by a power law resulting from the competition between elastic and fracture energies. The power law exponent (8/11) is in close agreement with experiments. We also show that a second (asymptotic) regime, with an exponent of 9/8, emerges for small distances between the two crack tips due to the finite transverse curvature of the elastic ridge joining them.
Supplementary document for Frequency-resolved characterization of broadband two-color air-plasma terahertz beam profiles - 6249108.pdf
Creators: name: Rasmussen, Mattias
name: Nagy, Oliver
name: Skupin, Stefan
name: Stathopulos, Alexandre
name: Berge, Luc
name: Jepsen, Peter
name: Zhou, Binbin
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: subject: 20501 Classical and Physical Optics
subject: FOS: Physical sciences

description: Supplementary document for the main manuscript
Reflecting to learn in a physics multimedia communication course
Creators: name: Tarr, Steven W.
name: Alicea-Muñoz, Emily
Publisher: name: arXiv
Year: 2024
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Science communication skills are considered essential learning objectives for undergraduate physics students. However, high enrollment and limited class resources present significant barriers to providing students ample opportunities to practice their formal presentation skills. We investigate the use of integrated critical reflection and peer evaluation activities in a physics senior seminar course both to improve student learning outcomes and to supplement highly restricted presentation time. Throughout the semester, each student delivers one 8-min multimedia presentation on either their research or an upper-division course topic. Following each presentation, audience members complete one of two randomly assigned peer evaluations: a treatment form that prompts critical reflection or a control form that does not. Each class period concludes with a short quiz on concepts presented in that day's presentations. We observe minimal differences in quiz scores between students in the control and treatment groups. Instead, we find that retention and transfer of presentation content correlate with certain metrics of presentation quality described in the Cognitive Theory of Multimedia Learning and with self-identified prior exposure to presentation topics.
description: 6 pages, 3 figures, 2024 Physics Education Research Conference (PERC) Proceedings
Maintenance of order in a moving strong condensate
Creators: name: Whitehouse, Justin
name: Costa, André
name: Blythe, Richard A
name: Evans, Martin R
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the conditions under which a moving condensate may exist in a driven mass transport system. Our paradigm is a minimal mass transport model in which $n-1$ particles move simultaneously from a site containing $n>1$ particles to the neighbouring site in a preferred direction. In the spirit of a Zero-Range process the rate $u(n)$ of this move depends only on the occupation of the departure site. We study a hopping rate $u(n) = 1 + b/n^α$ numerically and find a moving strong condensate phase for $b > b_c(α)$ for all $α>0$. This phase is characterised by a condensate that moves through the system and comprises a fraction of the system's mass that tends to unity. The mass lost by the condensate as it moves is constantly replenished from the trailing tail of low occupancy sites that collectively comprise a vanishing fraction of the mass. We formulate an approximate analytical treatment of the model that allows a reasonable estimate of $b_c(α)$ to be obtained. We show numerically (for $α=1$) that the transition is of mixed order, exhibiting exhibiting a discontinuity in the order parameter as well as a diverging length scale as $b\searrow b_c$.
description: 15 figs, 20 pages
Role of structural factors in formation of chiral magnetic soliton lattice in Cr1/3NbS2
Creators: name: Volkova, L. M.
name: Marinin, D. V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The sign and strength of magnetic interactions not only between nearest neighbors, but also for longer-range neighbors in the Cr1/3NbS2 intercalation compound have been calculated on the basis of structural data. It has been found that left-handed spin helices in Cr1/3NbS2 are formed from strength-dominant at low temperatures AFM interactions between triangular planes of Cr3+ ions through the plane of just one of two crystallographically equivalent diagonals of side faces of embedded into each other trigonal prisms building up the crystal lattice of magnetic Cr3+ ions. These helices are oriented along the c axis and packed into two-dimensional triangular lattices in planes perpendicular to these helices directions and lay one upon each other with a displacement. The competition of the above AFM helices with weaker inter-helix AFM interactions could promote the emergence of a long-period helical spin structure. One can assume that in this case the role of Dzyaloshinskii-Moriya interaction cosists in final ordering and stabilization of chiral spin helices into a chiral magnetic soliton lattice. The possibility of emergence of solitons in M1/3NbX2 and M1/3TaX2 (M = d-elements; X = S and Se) intercalate compounds has been examined. Two important factors caused by the crystal structure (predominantnchiral magnetic helices and their competition with weaker inter-helix interactions not destructing the system quasi-one-dimensional character) can be used for the crystal chemistry search of solitons.
description: 13 pages, 4 figures, published version
Coarse median structures and homomorphisms from Kazhdan groups
Creators: name: Zeidler, Rudolf
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65

description: We study Bowditch's notion of a coarse median on a metric space and formally introduce the concept of a coarse median structure as an equivalence class of coarse medians up to closeness. We show that a group which possesses a uniformly left-invariant coarse median structure admits only finitely many conjugacy classes of homomorphisms from a given group with Kazhdan's property (T). This is a common generalization of a theorem due to Paulin about the outer automorphism group of a hyperbolic group with property (T) as well as of a result of Behrstock-Drutu-Sapir on the mapping class groups of orientable surfaces. We discuss a metric approximation property of finite subsets in coarse median spaces extending the classical result on approximation of Gromov hyperbolic spaces by trees.
description: 23 pages, v2: Minor revision following the referee's suggestions. The final publication is available at link.springer.com via https://doi.org/10.1007/s10711-015-0090-8
Exact solution for a discrete-time SIR model
Creators: name: Lemos-Silva, Márcia
name: Vaz, Sandra
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Dynamical Systems (math.DS)
subject: Physics and Society (physics.soc-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: 65L10, 65L12, 39A30, 92-10

description: We propose a nonstandard finite difference scheme for the Susceptible-Infected-Removed (SIR) continuous model. We prove that our discretized system is dynamically consistent with its continuous counterpart and we derive its exact solution. We end with the analysis of the long-term behavior of susceptible, infected and removed individuals, illustrating our results with examples. In contrast with the SIR discrete-time model available in the literature, our new model is simultaneously mathematically and biologically sound.
description: This is a preprint published Open Access in 'Applied Numerical Mathematics' [https://doi.org/10.1016/j.apnum.2024.09.014]
title: Allgemeine Pädagogik
Creators: name: Doblmair, Michael
Year: 2021

description: Die vorliegende Arbeit fasst zunächst den Diskurs der Krise der Allgemeinen Pädagogik zusammen und sucht diesen historisch einzuordnen. Als ein Ergebnis dieser (rhapsodischen) Untersuchung erscheint die Allgemeinheit des Allgemeinen der Pädagogik verloren gegangen zu sein. Wozu dann überhaupt noch so etwas wie eine Allgemeine Pädagogik begründen, fragt sich ein Allgemeiner Pädagoge. Im Gegenzug dazu versucht diese Masterarbeit in Rückgriff auf Georg Lukács‘ Spätphilosophie und dem dort vorgeschlagenen Blickwechsel zu einer intentio recta die Not-Wendigkeit der Pädagogik in der Reproduktion der gesellschaftlichen Totalität zu ergründen, um den Grund der Pädagogik in der Humanisierung zu be-schreiben. Von hier aus wird versucht Konturen einer Allgemeinen Pädagogik zu skizzieren.
description: This master thesis explores in the first part the discourse of the (German) crisis of Allgemeine Pädagogik (General Pedagogy or Humanities Study in Pedagogy and Education) and tries to embed it in its historical context. As one result of this discourse the Generality (die Allgemeinheit) of this General Pedagogy appears to be vanished. Some conclude that the generality of pedagogy is not an ontic thing, therefore it can not be object of scientific research and has to be constituted rhetorically. In contrast to that, this master thesis tries to explore a change of view (an intentio recta), suggested in the late Philosophy of Georg Lukács, to lay the ground of Pedagogy as an answer to the needs of the totality of human being. Drawing from this, it seeks to formulate a rough sketch of Humanities Study in Pedagogy and Education.
title: Über SchülerInnenerfahrungen von Praktiken der Macht in der Lehrer-Schülerinteraktion
Creators: name: Fürst, Anna
Year: 2021

description: Die Ausübung von Macht im schulischen Kontext ist gesellschaftlich vorwiegend negativ behaftet. Im bildungswissenschaftlichen Kontext ist man sich hingegen der Notwendigkeit der Machtausübung im Unterricht zur Sicherung der Sozialisation bewusst. Zentral in der bildungstheoretischen Diskussion ist vor allem die Frage, wie mit dem pädagogischen Verhältnis, welches von Macht geprägt ist, umgegangen werden muss, um das Machtverhältnis pädagogisch legitimierbar zu machen. Diese Arbeit hat sich zum Ziel gesetzt, die Bedeutung von Machtpraktiken darzustellen und in Folge auf die subjektiven Erfahrungen von Schülerinnen und Schülern hinsichtlich der Anwendung von Machtpraktiken näher einzugehen. Durch den Fokus auf die individuellen Wahrnehmungen und Erfahrungen von Schülerinnen und Schülern soll ein Zugang zur Handlungspraxis geschaffen werden, welcher Einblick in das Unterrichtsgeschehen gibt, der in schulischen Leistungsstudien nicht berücksichtigt wird.
Commuting Quantum Circuits with Few Outputs are Unlikely to be Classically Simulatable
Creators: name: Takahashi, Yasuhiro
name: Tani, Seiichiro
name: Yamazaki, Takeshi
name: Tanaka, Kazuyuki
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the classical simulatability of commuting quantum circuits with n input qubits and O(log n) output qubits, where a quantum circuit is classically simulatable if its output probability distribution can be sampled up to an exponentially small additive error in classical polynomial time. First, we show that there exists a commuting quantum circuit that is not classically simulatable unless the polynomial hierarchy collapses to the third level. This is the first formal evidence that a commuting quantum circuit is not classically simulatable even when the number of output qubits is exponentially small. Then, we consider a generalized version of the circuit and clarify the condition under which it is classically simulatable. Lastly, we apply the argument for the above evidence to Clifford circuits in a similar setting and provide evidence that such a circuit augmented by a depth-1 non-Clifford layer is not classically simulatable. These results reveal subtle differences between quantum and classical computation.
description: 19 pages, 6 figures; v2: Theorems 1 and 3 improved, proofs modified
title: Die Widerlegung der missverstandenen Ansicht des epikureischen Lustprinzips anhand des Belegs ihrer Identifikation in der postmodernen Gesellschaft
Creators: name: Dervisevic, Irma
Year: 2021

description: Meditationshilfen / Klugheitsregeln / glückliche Lebensführung / neues Selbstsorgekonzept / postmoderne Gesellschaft
description: studies of happiness / new self-care concept / happy lifestyle
Shock-induced partial alignment in geometrically-thick tilted accretion disks around black holes
Creators: name: Gupta, Sajal
name: Dexter, Jason
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We carry out idealized three-dimensional general-relativistic magnetohydrodynamic (GRMHD) simulations of prograde, weakly magnetized, and geometrically thick accretion flows where the gas distribution is misaligned from the black hole spin axis. We evolve the disk for three black hole spins: $a = 0.5, 0.75$, and $0.9375$, and we contrast them with a standard aligned disk simulation with $a = 0.9375$. The tilted disks achieve a warped and twisted steady-state structure, with the outer disk misaligning further away from the black hole and surpassing the initial $24^\circ$ misalignment. However, closer to the black hole, there is evidence of partial alignment, as the inclination angle decreases with radius in this regime. Standing shocks also emerged in proximity to the black hole, roughly at $\sim$ 6 gravitational radii. We show that these shocks act to partially align the inner disk with the black hole spin. The rate of alignment increases with increasing black hole spin magnitude, but in all cases is insufficient to fully align the gas before it accretes. Additionally, we present a toy model of orbit crowding that can predict the location of the shocks in moderate-to-fast rotating black holes, illustrating a potential physical origin for the behavior seen in simulations\textemdash with possible applications in determining the positions of shocks in real misaligned astrophysical systems.
description: 17 pages, 11 figures, 1 Table and accepted for publication in ApJ
A covariant Stinespring type theorem for $τ$-maps
Creators: name: Trivedi, Harsh
Publisher: name: arXiv
Year: 2014
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: Primary: 46L08, 46L55, Secondary: 46L07, 46L53

description: Let $τ$ be a linear map from a unital $C^*$-algebra $\CMcal A$ to a von Neumann algebra $\mathematical B$ and let $\CMcal C$ be a unital $C^*$-algebra. A map $T$ from a Hilbert $\CMcal A$-module $E$ to a von Neumann $\CMcal C$-$\CMcal B$ module $F$ is called a $τ$-map if $$\langle T(x),T(y)\rangle=τ(\langle x, y\rangle)~\mbox{for all}~x,y\in E.$$ A Stinespring type theorem for $τ$-maps and its covariant version are obtained when $τ$ is completely positive. We show that there is a bijective correspondence between the set of all $τ$-maps from $E$ to $F$ which are $(u',u)$-covariant with respect to a dynamical system $(G,η,E)$ and the set of all $(u',u)$-covariant $\widetildeτ$-maps from the crossed product $E\times_η G$ to $F$, where $τ$ and $\widetildeτ$ are completely positive.
description: Final version, To appear in "Surveys in Mathematics and its Applications"
Covariance analysis for Energy Density Functionals and instabilities
Creators: name: Roca-Maza, X.
name: Paar, N.
name: Colò, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present the covariance analysis of two successful nuclear energy density functionals, (i) a non-relativistic Skyrme functional built from a zero-range effective interaction, and (ii) a relativistic nuclear energy density functional based on density dependent meson-nucleon couplings. The covariance analysis is a useful tool for understanding the limitations of a model, the correlations between observables and the statistical errors. We show, for our selected test nucleus 208Pb, that when the constraint on a property A included in the fit is relaxed, correlations with other observables B become larger; on the other hand, when a strong constraint is imposed on A, the correlations with other properties become very small. We also provide a brief review, partly connected with the covariance analysis, of some instabilities displayed by several energy density functionals currently used in nuclear physics.
description: Accepted in JPhysG; Focus issue "Enhancing the interaction between nuclear experiment and theory through information and statistics" (ISNET)
title: Die ethnische Zusammensetzung Serbiens mit besonderer Berücksichtigung der Entwicklung der Minderheitenrechte in verschiedenen Phasen der serbischen Gesichte
Creators: name: Mitrovic, Doroteja
Year: 2021

description: In dieser Diplomarbeit wird das Verhältnis zwischen serbischer Mehrheitsbevölkerung zu ihren ethnischen Minderheiten untersucht. Dabei steht die Entwicklung der Minderheitenrechte und das gesellschaftliche Klima gegenüber ethnischen Minderheiten im Vordergrund. Da Serbien ein Land mit wechselhafter Geschichte im Bereich des Minderheitenschutzes darstellt, soll anhand der konkreten Beschäftigung mit den Minderheitenrechten in verschiedenen Phasen der serbischen Geschichte die Entwicklung bis in die heutige Zeit analysiert werden. Als Grundlage dient hierbei das erste und zweite Jugoslawien, auch bekannt als Staat der Serben, Kroaten und Slowenen oder später Königreich Jugoslawien, sowie die Sozialistisch Föderative Republik Jugoslawien. Durch einen genauen Einblick in die Geschichte, die demographischen Zahlen und Minderheitenschutzbestimmungen dieser Phasen wird die Schlüsselrolle der damaligen Politik und deren verfolgte Absichten aufgezeigt. Ein weiteren Schwerpunkt dieser Arbeit bildet die aktuelle Lage der Minderheiten in Serbien und deren Integration in das gesellschaftliche, politische und wirtschaftliche Leben. Dabei wird ein besonderer Blick auf den EU-Integrationsprozess Serbiens geworfen, der als Schwerpunkt auch den Minderheitenschutz beinhaltet. Der Fokus liegt auf der Entwicklung und Integration der Minderheitenrechte in Serbien und deren Einfluss auf das Leben der Mehrheits- und Minderheitenbevölkerung. Unter diesen Aspekten leiten sich die zentralen Forschungsfragen dieser Arbeit ab. Sie lauten wie folgt: In welchem Verhältnis steht die Mehrheitsbevölkerung Serbiens zu ihren ethnischen Minderheiten? Situation und Selbstbild der Minderheiten in Bezug auf Herkunft und Ansiedlungen, Identitätsmerkmale, Kultur, Religion, Sprache, Außenbeziehungen? Was wird getan, um Minderheiten in den Staat und seine Institutionen besser einzubinden?
O(α_s^2) corrections to the running top-Yukawa coupling and the mass of the lightest Higgs boson in the MSSM
Creators: name: Kunz, D.
name: Mihaila, L.
name: Zerf, N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we propose a method to compute the running top-Yukawa coupling in supersymmetric models with heavy mass spectrum based on the "running" and "decoupling" procedure. In order to enable this approach we compute the two-loop SUSY-QCD radiative corrections required in the decoupling process. The method has the advantage that large logarithmic corrections are automatically resummed through the Renormalization Group Equations. As phenomenological application we study the effects of this approach on the prediction of the lightest Higgs boson mass at three-loop accuracy. We observe a significant reduction of the renormalization scale dependence as compared to the direct method, that is based on the conversion relation between the running and pole mass for the top quark. The effect of resummation of large logarithmic contributions consists in an increased prediction for the Higgs boson mass, an observation in agreement with the previous analyses.
description: 24 pages, 9 figures; one more figure added; reference list extended
Negative charge transfer energy in correlated compounds
Creators: name: Green, Robert J.
name: Sawatzky, George A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In correlated compounds containing cations in high formal oxidation states (assigned by assuming that anions attain full valence shells), the energy of ligand to cation charge transfer can become small or even negative. This yields compounds with a high degree of covalence and can lead to a self-doping of holes into the ligand states of the valence band. Such compounds are of particular topical interest, as highly studied perovskite oxides containing trivalent nickel or tetravalent iron are negative charge transfer systems, as are nickel-containing lithium ion battery cathode materials. In this report, we review the topic of negative charge transfer energy, with an emphasis on plots and diagrams as analysis tools, in the spirit of the celebrated Tanabe-Sugano diagrams which are the focus of this Special Topics Issue.
description: Review article for Special Topics issue on 70 Years of Tanabe-Sugano Diagrams
Interacting Weyl semimetals: characterization via the topological Hamiltonian and its breakdown
Creators: name: Witczak-Krempa, William
name: Knap, Michael
name: Abanin, Dmitry
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Weyl semimetals (WSMs) constitute a 3D phase with linearly-dispersing Weyl excitations at low energy, which lead to unusual electrodynamic responses and open Fermi arcs on boundaries. We derive a simple criterion to identify and characterize WSMs in an interacting setting using the exact electronic Green's function at zero frequency, which defines a topological Bloch Hamiltonian. We apply this criterion by numerically analyzing, via cluster and other methods, interacting lattice models with and without time-reversal symmetry. We identify various mechanisms for how interactions move and renormalize Weyl fermions. Our methods remain valid in the presence of long-ranged Coulomb repulsion. Finally, we introduce a WSM-like phase for which our criterion breaks down due to fractionalization: the charge-carrying Weyl quasiparticles are orthogonal to the electron.
description: 4+7 pages; 3+2 figs; v2: as published in PRL, extra clarifications, added references
Ethics in Medicine: a YouTube project-based learning
Creators: name: Cinara Silva Feliciano
name: De Arruda Leite, Fabiola
name: Nichollas Martins Areco
name: Valdes Roberto Bollela
Publisher: name: F1000 Research Limited
Year: 2024

description: Ethics and bioethics are priorities in the medical curriculum. However, the time dedicated to teaching these subjects is usually short and, in our setting, primarily consists of lectures and opportunistic case discussions, which hampers long-term retention and applicability in real-world settings. Therefore, this project aimed to develop a project-based learning approach centered on video creation (to be posted on a YouTube channel)  to address ethics violations using different strategies. Students were motivated and the relevance of ethics learning was clear to them. They also pointed out they could achieve an in-depth understanding of the topics and had fun with videos production. This strategy enabled a shift from a lecture-based to a learner-centered approach in such a relevant content and promoted the training of soft skills, as teamwork and cooperation.
title: Der Stellenwert von "Ethik" im skeptisch-transzendentalkritischen Einsatz in der Pädagogik
Creators: name: Holzmüller, Birgit
Year: 2021

description: Die vorliegende Arbeit thematisiert die Möglichkeit, einem skeptisch-transzendentalkritischen Einsatz in der Pädagogik ethisches Potential zuzuerkennen. Damit hat sie zum Ziel einen Beitrag zur Einschätzung dieses Zuganges zu Pädagogischem zu erbringen. Ausgehend vom Einwand, ein solcher Einsatz hätte aus ethischer Hinsicht zu Fragen der Pädagogik nichts beizutragen, wird über das Überdenken und Andersfassen des Begriffs der Ethik ein Nachdenken über das spezifische ethische Potential eines skeptisch-transzendentalkritischen Einsatzes eröffnet. Der erste Teil der Arbeit widmet sich hermeneutisch-kritisch den Grundlagentexten des skeptisch-transzendentalkritischen An- und Einsatzes und skeptisch den Einwänden, die gegen ein ethisches Potential eintreten, um im Anschluss deskriptiv zu erarbeiten, unter welchen Bedingungen und auf welche Weise ethisches Potential entfaltet werden kann. Der zweite Teil untersucht skeptisch-transzendentalkritische Ein-sätze auf ihr jeweiliges ethisches Potential hin. Es kann nachgewiesen werden, dass dem Einwand ein normatives Konzept von Ethik selbstverständlich zu Grunde liegt und der Einbezug von skeptischen Ethikkonzeptionen erhellende Anknüpfungspunkte für die Bearbeitung der Forschungsfrage bereithält. So lassen sich sowohl in der besonderen Haltung, die ein Skeptiker/eine Skeptikerin einnimmt und die erst zu einem derartigen Einsatz führt, ethisches Potential ausmachen, als auch in seinem methodischen Vorgehen, seinem sachlichen Motiv und seinen Ergebnissen.
Fragmentation in Jets at NNLO
Creators: name: Ritzmann, Mathias
name: Waalewijn, Wouter J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Beam and jet functions in Soft-Collinear Effective Theory describe collinear initial- and final-state radiation (jets), and enter in factorization theorems for N-jet production, the Higgs pT spectrum, etc. We show that they may directly be calculated as phase-space integrals of QCD splitting functions. At NLO all computations are trivial, as we demonstrate explicitly for the beam function, the transverse-momentum-dependent beam function, the jet function and the fragmenting jet function. This approach also highlights the role of crossing symmetry in these calculations. At NNLO we reproduce the quark jet function and calculate the fragmenting quark jet function for the first time. Here we use two methods: a direct phase-space integration and a reduction to master integrals which are computed using differential equations.
description: 25 pages + Mathematica files with expressions, v2: introduction expanded, errors fixed in NNLO fragmenting jet matching coefficients (Sec. IV F), v3: journal version
Ethiopian Socio Economic Survey Agriculture Post Planting Crop Cut and Livestock Questionnaire
Creators: name: Central Statistical Agency
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2022

description: Datasets For Ethiopian Socio Economic Survey Agriculture(post planting wave 4) Questionnaire Section 1: Household Roster https://nadre.ethernet.edu.et/record/20605/files/sect1_pp_w4.csv?download=1 Section 2: Parcel Roster https://nadre.ethernet.edu.et/record/20605/files/sect2_pp_w4.csv?download=1 Section 3: Field Roster https://nadre.ethernet.edu.et/record/20605/files/sect3_pp_w4.csv?download=1 Section 4: Crop Roster https://nadre.ethernet.edu.et/record/20605/files/sect4_pp_w4.csv?download=1 Section 5: Seeds Roster https://nadre.ethernet.edu.et/record/20605/files/sect5_pp_w4.csv?download=1 Section 8.1: Ownership https://nadre.ethernet.edu.et/record/20605/files/sect8_1_ls_w4.csv?download=1 Section 8.2: Change in Stock https://nadre.ethernet.edu.et/record/20605/files/sect8_2_ls_w4.csv?download=1 Section 8.3: Breending https://nadre.ethernet.edu.et/record/20605/files/sect8_3_ls_w4.csv?download=1 Section 8.6a: Milch Production https://nadre.ethernet.edu.et/record/20605/files/sect8_4_ls_w4.csv?download=1 Section 9a: Crop Cut by Field https://nadre.ethernet.edu.et/record/20605/files/sect9a_pp_w4.csv?download=1 Section 7: Miscellaneous Questions for the Holder https://nadre.ethernet.edu.et/record/20605/files/sect7_pp_w4.csv?download=1
title: Lernen über die Stadt, in der Stadt und durch die Stadt
Creators: name: Winkler, Thomas
Year: 2021

description: Will man den Geschichtsunterricht schülergerecht, abwechslungsreich und nachhaltig gestalten, empfiehlt es sich, als Lehrperson die Publikationen der fachdidaktischen Forschung zu rezipieren. Sie bilden die theoretische Grundlage für zeitgemäßes, fach- und kompetenzorientiertes Unterrichten und bieten Lösungsansätze für die vielfältigen Herausforderungen, die Lehrenden in der Praxis begegnen. Welche davon man für den eigenen Unterricht aufgreift, bleibt der Lehrkraft letztendlich selbst überlassen. Nach Darlegung wesentlicher Gütekriterien für einen ertragreichen Geschichtsunterricht werden in der vorliegenden Arbeit zunächst die Vorteile didaktischer Prinzipien wie Handlungs- und Prozessorientierung sowie exemplarischen und außerschulischen Lernens erörtert und anschließend Methoden für deren praktischen Anwendung vorgestellt. Der zweite Teil der Arbeit widmet sich der Auswertung einer empirischen Studie, die unter Schülerinnen und Schülern der HTL Wiener Neustadt durchgeführt wurde. Sie dient als Basis für den Versuch, die theoretischen Ausführungen mit Überlegungen zur praktischen Umsetzung in dieser Schule zu verknüpfen. Unter Berücksichtigung der Theorien über das pädagogische Potenzial lebensweltnaher außerschulischer Lernorte wird der Schulstandort Wiener Neustadt umfassend in das didaktische Konzept eingebunden. Dieser Umstand kommt vor allem im Praxisteil zum Tragen, wo für historisches und politisches Lernen nutzbare örtliche Baubestände und Sachverhalte bestimmten Basiskonzepten untergeordnet werden. Die vorgestellten Fragestellungen, die eine Auseinandersetzung mit dem jeweiligen Themengebiet einleiten sollen, werden von den Ergebnissen der Umfrage begleitet. Diese geben Aufschluss darüber, wo die Interessen der Schülerinnen und Schüler liegen, wo es sich also in der Praxis anzuknüpfen lohnt.
title: Der zukünftige Einsatz von digitalen Lernumgebungen im sekundären Bildungsbereich
Creators: name: Rott, Florian
Year: 2021

description: In dieser Arbeit soll das Arbeiten mit Lernumgebungen im digitalen Raum bezugnehmend auf die Erfahrungen die Lehrpersonen in der Phase des Distance Learnings während der COVID-19 Pandemie, beginnend mit dem Frühjahr 2020, gemacht haben, aufgearbeitet werden. Diese Erfahrungen werden mit Hilfe eines Fragebogens bei österreichischen Lehrer*innen der Sekundarstufe erfragt. Mit den dabei gewonnenen Erkenntnissen werden, zusammen mit bestehender Literatur vier Schwerpunkte herausgearbeitet, die im Anschluss näher bearbeitet werden. Dabei wird versucht auf Basis der festgehaltenen Erfahrungen, ein nachhaltiges Konzept zur Verwendung von digitalen Lernumgebungen zu skizzieren.