cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Diophantus redivivus: is Diophantus an early-modern classic?
Creators: name: Goldstein, Catherine
Publisher: name: arXiv
Year: 2021
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics

description: Many early-modern mathematical books incorporated at least a part of Diophantus' Arithmetica, from Jacques de Billy's Diophanti Redivi Pars prior et posterior to John Kersey's Third and Fourth Books of the Elements of algebra or Jacques Ozanam's Recr{é}ations math{é}matiques. Diophantine questions regularly circulated among mathematicians of the time in the context of exchanges of problems or challenges. It is thus tempting to consider Diophantus's opus magnum as a classic. However, I argued in my talk that, while Diophantus was indeed a classical author for early-modern mathematicians, his main work did not become a classical book.
Orthorektische Tendenzen von Personen in Gesundheitsberufen
Creators: name: Arnreiter, Dominik
Year: 2019

description: Background: Orthorexia nervosa (ON) is a term used to describe an obsession with healthy eating and it can have an influence on the social conditions of concerned people. At the moment ON has no independent clinical picture. Purpose: This master thesis examines if there is a difference of ON prevalence between health professionals and non-health professionals. Methods: The Düsseldorf Orthorexia Scale (DOS) has demonstrated to be a valid measuring tool for such a purpose. Over the social media platform facebook 637 people have completed the online questionaire and 440 (52.3 % health professionals / 47.7 % non-heatlh professionals) where included in the final evaluation. Results: The overall prevalence of ON (DOS score ≥ 30) was 5.7 % and the risk for ON was 9.3 % (DOS score 25-29). There was a difference between health professionals and non-health professionals in the mean values (19.4 ± 5.9 vs 17.4 ± 5.3) (p<0.001) and prevalence (8.3 % vs 2.9 %) (p<0.01) of ON. Especially male health professionals had with 16.2 % (female 4.9 %) the highest ON prevalence (p=0.001). The biggest difference could be observed in the health professionals category „nutrition“ between male and female persons (22.5 % vs 3.8 %) (p=0.017). Conclusion: The results showed that the supposed health professionals effect on the prevalence of ON exists but only for male persons.
description: Hintergrund: Orthorexia nervosa (ON) beschreibt die Besessenheit von einer gesunden Ernährung und kann einen Einfluss auf die sozialen Verhältnisse der Betroffenen haben. Derzeit ist ON kein eigenständiges Krankheitsbild. Absicht: Diese Masterarbeit beschäftigt sich mit der Fragestellung, ob die Prävalenz für ON in Gesundheitsberufen häufiger als in Nicht-Gesundheitsberufen ist. Methoden: Die Düsseldorfer Orthorexie Skala (DOS) hat sich als valides Messinstrument für diese Art von Fragestellung erwiesen. Über das soziale Medium Facebook füllten 637 Personen den Online-Fragebogen vollständig aus und davon wurden 440 Personen (52,3 % Gesundheitsberufe / 47,7 % Nicht-Gesundheitsberufe) in die finale Auswertung eingeschlossen. Resultate: Die allgemeine Prävalenz für ON (DOS-Wert ≥ 30) lag bei 5,7 % und das Risiko für Orthorexie bei 9,3 % (DOS-Wert von 25 bis 29). Zwischen Personen in Gesundheitsberufen und Nicht-Gesundheitsberufen konnte ein signifikanter Mittelwertunterschied (19,4 ± 5,9 vs. 17,4 ± 5,3) (p<0,001) und ein signifikanter Unterschied in der Prävalenz für Orthorexie (8,3 % vs. 2,9 %) (p<0,01) festgestellt werden. Besonders männliche Personen in Gesundheitsberufen erreichten mit 16,2 % (weiblich 4,9 %) die höchste Prävalenz für Orthorexie (p=0,001). Der größte Unterschied in den Prävalenzen für ON konnte in der Gesundheitsberufssparte „Ernährung“ zwischen männlichen und weiblichen Teilnehmern (22,5 % vs. 3,8 %) (p=0,017) beobachtet werden. Fazit: Die gefundenen Resultate zeigen, dass der vermutete Effekt von Gesundheitsberufen auf die Prävalenz für Orthorexie nur bei männlichen Teilnehmern bestätigt werden konnte.
Modified (A)dS Schwarzschild black holes in Rainbow spacetime
Creators: name: Li, Huarun
name: Ling, Yi
name: Han, Xin
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A modified (Anti-)de Sitter Schwarzschild black hole solution is presented in the framework of rainbow gravity with a cosmological constant. Its thermodynamical properties are investigated. In general the temperature of modified black holes is dependent on the energy of probes which take the measurement. However, a notion of intrinsic temperature can be introduced by identifying these probes with radiation particles emitted from black holes. It is interesting to find that the Hawking temperature of this sort of black holes can be reproduced by employing the extended uncertainty principle and modified dispersion relations to the ordinary (A)dS Schwarzschild black holes.
description: 11 pages. The version to appear in CQG
Self-learning hybrid Monte Carlo method for isothermal-isobaric ensemble: Application to liquid silica
Creators: name: Kobayashi, Keita
name: Nagai, Yuki
name: Itakura, Mitsuhiro
name: Shiga, Motoyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Self-learning hybrid Monte Carlo (SLHMC) is a first-principles simulation that allows for exact ensemble generation on potential energy surfaces based on density functional theory. The statistical sampling can be accelerated with the assistance of smart trial moves by machine learning potentials. In the first report (Nagai, {\it et al}. Phys. Rev. B 102, 041124(R) (2020)), the SLHMC approach was introduced for the simplest case of canonical sampling. We herein extend this idea to isothermal-isobaric ensembles to enable general applications for soft materials and liquids with large volume fluctuation. As a demonstration, the isothermal-isobaric SLHMC method was used to study the vibrational structure of liquid silica at temperatures close to the melting point, whereby the slow diffusive motion is beyond the time scale of first-principles molecular dynamics. It was found that the static structure factor thus computed from first-principles agrees quite well with the high-energy X-ray data.
description: To be published in the Journal of Chemical Physics
Identifying regions in wide-angle scattering via graph-theoretical approaches
Creators: name: Ma, Yao
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The method of regions, which provides a systematic approach for computing Feynman integrals involving multiple kinematic scales, proposes that a Feynman integral can be approximated and even reproduced by summing over integrals expanded in certain regions. A modern perspective of the method of regions considers any given Feynman integral as a specific Newton polytope, defined as the convex hull of the points associated with Symanzik polynomials. The regions then correspond one-to-one with the lower facets of this polytope.
 As Symanzik polynomials correspond to the spanning trees and spanning 2-trees of the Feynman graph, a graph-theoretical study of these polynomials may allow us to identify the complete set of regions for a given expansion. In this work, our primary focus is on three specific expansions: the on-shell expansion of generic wide-angle scattering, the soft expansion of generic wide-angle scattering, and the mass expansion of heavy-to-light decay. For each of these expansions, we employ graph-theoretical approaches to derive the generic forms of the regions involved in the method of regions. The results, applicable to all orders, offer insights that can be leveraged to investigate various aspects of scattering amplitudes.
description: 167 pages, 61 figures
The philosophical ideas of N. G. Chernyshevsky
Creators: name: Pohoral, Georgine Barbara
Publisher: name: University of British Columbia
Year: 2010

description: This thesis deals with three major works by N.G. Chernyshevsky: his first novel, "What Is To Be Done?", and his two philosophical essays, "The Anthropological Principle in Philosophy" and "The Aesthetic Relation of Art to Reality." Chernyshevsky's text is closely examined to present a fair cross-section of his arguments and the manner in which they are formulated, and to point our their shortcomings. "What Is To Be Done?", although written as a form of fiction, lacks psychological intricacies. The purpose of the work is political propaganda; hence its form is a philosophical dialogue, in which Chernyshevsky attempts to formulate his own system of ethics. He grapples unsuccessfully with utilitarianism, adopting some of the principles of J.S. Mill. In "The Anthropological Principle in Philosophy," Chernyshevsky attempts to formulate his own theory of knowledge. He shows himself to be a kind of empiricist, with strong tendencies toward materialism and pragmatism. He also tackles some moral issues, advocating utilitarianism. In "The Aesthetic Relation of Art to Reality," Chernyshevsky offers a critique of Hegelian aesthetics. He then proceeds to develop his own aesthetic theory. The approach to all three works is to lay bare Chernyshevsky's system, point out his philosophical inconsistencies and show where his prejudices lie. Chernyshevsky's work is demonstrated to be of little merit as far as its philosophical depth and literary scope are concerned. Instead, it stands as a monument to the kind of attitudes and concerns of the Russian positivist of the mid-nineteenth century.
Fully dynamic earthquake cycle simulations on a non-planar fault using the spectral boundary integral element method
Creators: name: Romanet, Pierre
name: Ozawa, So
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: One of the most suitable methods for modeling fully dynamic earthquake cycle simulations is the spectral boundary integral element method (sBIEM), which takes advantage of the fast Fourier transform (FFT) to make a complex numerical dynamic rupture tractable. However, this method has the serious drawback of requiring a flat fault geometry due to the FFT approach. Here we present an analytical formulation that extends the sBIEM to a mildly non-planar fault. We start from a regularized boundary element method and apply a small-slope approximation of the fault geometry. Making this assumption, it is possible to show that the main effect of non-planar fault geometry is to change the normal traction along the fault, which is controlled by the local curvature along the fault. We then convert this space--time boundary integral equation of the normal traction into a spectral-time formulation and incorporate this change in normal traction into the existing sBIEM methodology. This approach allows us to model fully dynamic seismic cycle simulations on non-planar faults in a particularly efficient way. We then test this method against a regular boundary integral element method for both rough-fault and seamount fault geometries, and demonstrate that this sBIEM maintains the scaling between the fault geometry and slip distribution.
Die Kommunikationswissenschaft und ihre Methoden
Creators: name: Oberleitner, Natalie
Year: 2019

description: Die vorliegende Arbeit beschäftigt sich mit der Frage nach dem Methodenverständnis der deutschsprachigen Kommunikationswissenschaft und dem Stellenwert methodologischer Reflexion im Zuge ihrer Forschungspraxis. Dabei soll aufgezeigt werden, inwiefern sich die Kommunikationswissenschaft kritisch mit ihren Methoden auseinandersetzt, welche methodologische Grundorientierung aus dem kommunikationswissenschaftlichen Selbstverständnis generell hervorgeht und welche Rolle der historische Entwicklungskontext der Disziplin dabei gespielt hat. Ausgangspunkt der Auseinandersetzung mit der Fragestellung bilden zunächst das gegenwärtige Selbstverständnis der Disziplin, das Fachverständnis ihrer Scientific Community und die fachhistorische Entwicklung in Deutschland sowie parallel dazu die Etablierung der US-amerikanischen Kommunikationsforschung. Dabei zeigt sich, dass die empirisch-sozialwissenschaftliche Wende in den 1960er Jahren und die Orientierung an den USA wesentliche Faktoren in der Entwicklung des heutigen Status Quo des kommunikationswissenschaftlichen Methodenverständnisses darstellen. Insgesamt bedient sich die Kommunikationswissenschaft gemäß ihrem Selbstverständnis als empirische Sozialwissenschaft vornehmlich der Methoden der empirischen Sozialforschung und bezieht ihre wissenschaftstheoretische Fundierung implizit aus dem Kritischen Rationalismus. Darüber hinaus orientiert sich die Mehrheit der einführenden Forschungs- und Methodenliteratur eher an quantitativen Verfahren mit der Begründung, dass der Großteil kommunikations-wissenschaftlicher Forschungsergebnisse eben darauf basiert. Tatsächlich finden sich in der Literatur verhältnismäßig wenige konkrete Überlegungen zu methodischen Fragen und Problemen. Ein möglicher Grund dafür findet sich in den Entwicklungslinien der empirischen Sozialforschung im Allgemeinen, die nach 1945 zu großen Teilen außerhalb des universitären Kontexts und damit entkoppelt von der sozialwissenschaftlichen Theoriebildung stattgefunden hat. Weitere Gründe hierfür sind womöglich die wissenschaftliche Sozialisation von Kommunikationswissenschaftlern sowie forschungsökonomische Limitationen in der Praxis. Ausgehend von diesen Zwischenbefunden werden zu den initial gestellten Fragestellungen mittels Ludwik Flecks „Lehre vom Denkstil und Denkkollektiv“ und unter Berücksichtigung von Befunden aus der neueren Wissenschaftsforschung mögliche sozialpsychologische, soziokulturelle und historische Bedingungen in der Entwicklung der kommunikationswissenschaftlichen Forschungspraxis aufgezeigt. Diese können als Anknüpfungspunkte für zukünftige wissenschaftswissenschaftliche Untersuchungen in der Kommunikationswissenschaft dienen.
Simple d=4 supergravity with a boundary
Creators: name: Belyaev, Dmitry V.
name: van Nieuwenhuizen, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: To construct rigidly or locally supersymmetric bulk-plus-boundary actions, one needs an extension of the usual tensor calculus. Its key ingredients are the extended (F-, D-, etc.) density formulas and the rule for the decomposition of bulk multiplets into (co-dimension one) boundary multiplets. Working out these ingredients for d=4 N=1 Poincaré supergravity, we discover the special role played by R-symmetry (absent in the d=3 N=1 case we studied previously). The $U(1)_A$ R-symmetry has to be gauged which leads us to extend the old-minimal set of auxiliary fields S, P, A_μby a $U(1)_A$ compensator $a$. Our results include the ``F+A'' density formula, the ``Q+L+A'' formula for the induced supersymmetry transformations (closing into the standard d=3 N=1 algebra) and demonstration that the compensator $a$ is the first component of the extrinsic curvature multiplet. We rely on the superconformal approach which allows us to perform, in parallel, the same analysis for new-minimal supergravity.
description: 26 pages. JHEP format
Impact Sheet IRME 2042
Creators: name: Carlsen Bach, Cecilie
name: Maagaard Gregersen, Rikke
name: Heinesen Højsted, Ingi
name: Kjær Pedersen, Mathilde
name: Jankvist, Uffe Thomas
Publisher: name: Brill Online
Year: 2025
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: Impact Sheet
Models of cosmological black holes
Creators: name: Dahal, Pravin K.
name: Maharana, Swayamsiddha
name: Simovic, Fil
name: Soranidis, Ioannis
name: Terno, Daniel R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study various aspects of modeling astrophysical black holes using the recently introduced semiclassical formalism of physical black holes (PBHs). This approach is based on the minimal requirements of observability and regularity of the horizons. We demonstrate that PBHs do not directly couple to the cosmological background in the current epoch, and their equation of state renders them unsuitable for describing dark energy. Utilizing their properties for analysis of more exotic models, we present a consistent semiclassical scenario for a black-to-white hole bounce and identify obstacles to the transformation from a black hole horizon to a wormhole mouth.
description: 8 pages, 2 figures. Comments welcome!
Three Avatars of Mock Modularity
Creators: name: Dabholkar, Atish
name: Putrov, Pavel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Mock theta functions were introduced by Ramanujan in 1920 but a proper understanding of mock modularity has emerged only recently with the work of Zwegers in 2002. In these lectures we describe three manifestations of this apparently exotic mathematics in three important physical contexts of holography, topology and duality where mock modularity has come to play an important role.
description: 36 pages. Lectures delivered at 2020 ICTP Online Summer School on String Theory and Related Topics. Based on arXiv:1208.4074, arXiv:1905.05207, arXiv:2004.14387
On normal odd partitions in cubic graphs
Creators: name: Fouquet, Jean-Luc
name: Vanherpe, Jean-Marie
Publisher: name: arXiv
Year: 2008
Subjects: subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: A normal partition of the edges of a cubic graph is a partition into trails (no repeated edge) such that each vertex is the end vertex of exactly one trail of the partition. We investigate this notion and give some results and problems.
Deep learning-based multi-output quantile forecasting of PV generation
Creators: name: Dumas, Jonathan
name: Cointe, Colin
name: Fettweis, Xavier
name: Cornélusse, Bertrand
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper develops probabilistic PV forecasters by taking advantage of recent breakthroughs in deep learning. It tailored forecasting tool, named encoder-decoder, is implemented to compute intraday multi-output PV quantiles forecasts to efficiently capture the time correlation. The models are trained using quantile regression, a non-parametric approach that assumes no prior knowledge of the probabilistic forecasting distribution. The case study is composed of PV production monitored on-site at the University of Liège (ULiège), Belgium. The weather forecasts from the regional climate model provided by the Laboratory of Climatology are used as inputs of the deep learning models. The forecast quality is quantitatively assessed by the continuous ranked probability and interval scores. The results indicate this architecture improves the forecast quality and is computationally efficient to be incorporated in an intraday decision-making tool for robust optimization.
On the different Floquet Hamiltonians in a periodic-driven Bose-Josephson junction
Creators: name: Lin, Xiaoshui
name: Rao, Zeyu
name: Gong, Ming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The bosonic Josephson junction, one of the maximally simple models for periodic-driven many-body systems, has been intensively studied in the past two decades. Here, we revisit this problem with five different methods, all of which have solid theoretical reasoning. We find that to the order of $ω^{-2}$ ($ω$ is the modulating frequency), these approaches will yield slightly different Floquet Hamiltonians. In particular, the parameters in the Floquet Hamiltonians may be unchanged, increased, or decreased, depending on the approximations used. Especially, some of the methods generate new interactions, which still preserve the total number of particles; and the others do not. The validity of these five effective models is verified using dynamics of population imbalance and self-trapping phase transition. In all results, we find the method by first performing a unitary rotation to the Hamiltonian will have the highest accuracy. The difference between them will become significate when the modulating frequency is comparable with the driving amplitude. The results presented in this work indicate that the analysis of the Floquet Hamiltonian has some kind of subjectivity, which will become an important issue in future experiments with the increasing of precision. We demonstrate this physics using a Bose-Josephson junction, and it is to be hoped that the validity of these methods and their tiny differences put forward in this work can be verified in realistic experiments in future using quantum simulating platforms, including but not limited to ultracold atoms.
description: 12 pages, 3 figures
Die Machttechniken im Reich der Inka
Creators: name: Hödl, Daniel Felix
Year: 2019

description: Diese Arbeit beschäftigt sich mit der Untersuchung der inkaischen Machttechniken. Im Mittelpunkt dieser Untersuchung steht ein Machtbegriff auf Basis von Foucault. Nach einer Einführung zu einem foucaultschen Machtbegriff werden die inneren Strukturen sowie die Bedeutung des Mythos‘ und Übernatürlichen historisch im Bezug auf ihre Rolle der Stabilität und Ausweitung von Macht erörtert und anschließend gegenübergestellt. Der Untergang der Sonnensöhne wird ebenfalls erläutert. Schließlich werden all diese historischen Ereignisse und Veränderungen innerhalb des Inka-Staates und unter der Regentschaft der verschiedenen Inka-Herrscher auf ihre Rolle zur Erhaltung und Expansion der inkaischen Macht untersucht und analysiert. Dabei werden sowohl die Eigenschaften der Macht, also die Notwendigkeit von Freiheit und Widerstand, als auch ihre Techniken der Stärkung, Individualisierung und Biopolitik, sowie die Vorgehensweise der Umkehrung oder Transformation derselben, durch allmähliche Adaption, welche Foucault in seinen Werken erörtert, analysiert.
Observation of inter-Landau-level quantum coherence in semiconductor quantum wells
Creators: name: Dani, K. M.
name: Cotoros, I. A.
name: Wang, J.
name: Tignon, J.
name: Chemla, D. S.
name: Kavousanaki, E. G.
name: Perakis, I. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using three-pulse four-wave-mixing femtosecond spectroscopy, we excite a non-radiative coherence between the discrete Landau levels of an undoped quantum well and study its dynamics. We observe quantum beats that reflect the time evolution of the coherence between the two lowest Landau level magnetoexcitons. We interpret our observations using a many-body theory and find that the inter Landau level coherence decays with a new time constant, substantially longer than the corresponding interband magnetoexciton dephasing times. Our results indicate a new intraband excitation dynamics that cannot be described in terms of uncorrelated interband excitations.
description: 5 pages, 5 figures, to appear in Phys. Rev. B Rapid Communications
Role of quantum coherence in chromophoric energy transport
Creators: name: Rebentrost, Patrick
name: Mohseni, Masoud
name: Aspuru-Guzik, Alán
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The role of quantum coherence and the environment in the dynamics of excitation energy transfer is not fully understood. In this work, we introduce the concept of dynamical contributions of various physical processes to the energy transfer efficiency. We develop two complementary approaches, based on a Green's function method and energy transfer susceptibilities, and quantify the importance of the Hamiltonian evolution, phonon-induced decoherence, and spatial relaxation pathways. We investigate the Fenna-Matthews-Olson protein complex, where we find a contribution of coherent dynamics of about 10% and of relaxation of 80%.
description: 5 pages, 3 figures, included static disorder, correlated environment
Evidence for low kick velocities among high-mass X-ray binaries in the Small Magellanic Cloud from the spatial correlation function
Creators: name: Bodaghee, Arash
name: Antoniou, Vallia
name: Zezas, Andreas
name: Tomsick, John A.
name: Jordan, Zachary
name: Frechette, Eric
name: Jackson, Brenton
name: Agnew, Ryan
name: Hornschemeier, Ann E.
name: Rodriguez, Jerome
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the two-point cross-correlation function between high-mass X-ray binaries (HMXBs) in the Small Magellanic Cloud (SMC) and their likely birthplaces (OB Associations: OBAs). This function compares the spatial correlation between the observed HMXB and OBA populations against mock catalogs in which the members are distributed randomly across the sky. A significant correlation (15 sigma) is found for the HMXB and OBA populations when compared with a randomized catalog in which the OBAs are distributed uniformly over the SMC. A less significant correlation (4 sigma) is found for a randomized catalog of OBAs built with a bootstrap method. However, no significant correlation is detected when the randomized catalogs assume the form of a Gaussian ellipsoid or a distribution that reflects the star-formation history from 40 Myr ago. Based on their observed distributions and assuming a range of migration timescales, we infer that the average value of the kick velocity inherited by an HMXB during the formation of its compact object is 2-34 km/s. This is considerably less than the value obtained for their counterparts in the Milky Way hinting that the galactic environment affecting stellar evolution plays a role in setting the average kick velocity of HMXBs.
description: 10 pages, 7 figures, accepted for publication in the Astrophysical Journal
Superconductivity and Pseudogap in Quasi-Two-Dimensional Metals around the Antiferromagnetic Quantum Critical Point
Creators: name: Kondo, Hisashi
name: Moriya, Toru
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Spin fluctuations (SF) and SF-mediated superconductivity (SC) in quasi-two-dimensional metals around the antiferrromagnetic (AF) quantum critical point (QCP) are investigated by using the self-consistent renormalization theory for SF and the strong coupling theory for SC. We introduce a parameter y0 as a measure for the distance from the AFQCP which is approximately proportional to (x-xc), x being the electron (e) or hole (h) doping concentration to the half-filled band and xc being the value at the AFQCP. We present phase diagrams in the T-y0 plane including contour maps of the AF correlation length and AF and SC transition temperatures TN and Tc, respectively. The Tc curve is dome-shaped with a maximum at around the AFQCP. The calculated one-electron spectral density shows a pseudogap in the high-density-of-states region near (pi,0) below around a certain temperature T* and gives a contour map at the Fermi energy reminiscent of the Fermi arc. These results are discussed in comparison with e- and h-doped high-Tc cuprates.
description: 5 pages, 3 figures
Non-axisymmetric instability of axisymmetric magnetic fields
Creators: name: Bonanno, Alfio
name: Urpin, Vadim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The MHD instabilities can generate complex field topologies even if the initial field configuration is a very simple one. We consider the stability properties of magnetic configurations containing a toroidal and an axial field. In this paper, we concentrate mainly on the behavior of non-axisymmetric perturbations in axisymmetric magnetic configurations. The stability is treated by a linear analysis of ideal MHD equations.In the presence of an axial field, it is shown that the instability can occur for a wide range of the azimuthal wavenumber $m$, and its growth rate increases with increasing $m$. At given $m$, the growth rate is at its maximum for perturbations with the axial wave-vector that makes the Alfvén frequency approximately vanishing. We argue that the instability of magnetic configurations in the ideal MHD can typically be dominated by perturbations with very short azimuthal and axial wavelengths.
description: 8 pages, 8 figurs, A&A, in press
Automotive diesel engine transient operation: modeling, optimization and control
Creators: name: Mancini, Giorgio <1985>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: ING-IND/08 Macchine a fluido

description: Traditionally, the study of internal combustion engines operation has focused on the steady-state performance. However, the daily driving schedule of automotive engines is inherently related to unsteady conditions. 
There are various operating conditions experienced by (diesel) engines that can be classified as transient. Besides the variation of the engine operating point, in terms of engine speed and torque, also the warm up phase can be considered as a transient condition. Chapter 2 has to do with this thermal transient condition; more precisely the main issue is the performance of a Selective Catalytic Reduction (SCR) system during cold start and warm up phases of the engine. The proposal of the underlying work is to investigate and identify optimal exhaust line heating strategies, to provide a fast activation of the catalytic reactions on SCR. 
Chapters 3 and 4 focus the attention on the dynamic behavior of the engine, when considering typical driving conditions. The common approach to dynamic optimization involves the solution of a single optimal-control problem. However, this approach requires the availability of models that are valid throughout the whole engine operating range and actuator ranges. In addition, the result of the optimization is meaningful only if the model is very accurate.
Chapter 3 proposes a methodology to circumvent those demanding requirements: an iteration between transient measurements to refine a purpose-built model and a dynamic optimization which is constrained to the model validity region. Moreover all numerical methods required to implement this procedure are presented. 
Chapter 4 proposes an approach to derive a transient feedforward control system in an automated way. It relies on optimal control theory to solve a dynamic optimization problem for fast transients. From the optimal solutions, the relevant information is extracted and stored in maps spanned by the engine speed and the torque gradient.
Über die Arbeit mit ZeitzeugInnen-Interviews bei Erinnern.at
Creators: name: Ecker, Maria
Publisher: name: Medienimpulse
Year: 2014

description: Maria Ecker berichtet von den bisherigen Erfahrungen der Plattform erinnern.at mit der medialen Speicherung und Webverarbeitung von Interviews mit Überlebenden der Shoah, die 2008 und 2011 als DVDs erschienen sind. Dabei berichtet Ecker detailliert von den Produktionsbedingungen der Projektteams und diskutiert eingehend Probleme der didaktischen Aufbereitung von ZeitzeugInnen-Interviews im Zeitalter des Web 2.0 sowie die Rolle und Funktion von (technischen) Medien im Verlauf des Rezeptionsprozesses.
description: Medienimpulse, Bd. 50 Nr. 1 (2012): 1/2012 - Repräsentation(en) der Shoah
Complex Ground-State and Excitation Energies in Coupled-Cluster Theory
Creators: name: Thomas, Simon
name: Hampe, Florian
name: Stopkowicz, Stella
name: Gauss, Jürgen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Since in coupled-cluster (CC) theory ground-state and excitation energies are eigenvalues of a non-Hermitian matrix, these energies can in principle take on complex values. In this paper we discuss the appearance of complex energy values in CC calculations from a mathematical perspective. We analyze the behaviour of the eigenvalues of Hermitian matrices that are perturbed (in a non-Hermitian manner) by a real parameter. Based on these results we show that for CC calculations with real-valued Hamiltonian matrices the ground-state energy generally takes a real value. Furthermore, we show that in the case of real-valued Hamiltonian matrices complex excitation energies only occur in the context of conical intersections. In such a case, unphysical consequences are encountered such as a wrong dimension of the intersection seam, large numerical deviations from full configuration-interaction (FCI) results, and the square-root-like behaviour of the potential surfaces near the conical intersection. In the case of CC calculations with complex-valued Hamiltonian matrix elements, it turns out that complex energy values are to be expected for ground and excited states when no symmetry is present. We confirm the occurrence of complex energies by sample calculations using a six-state model and by CC calculations for the H2O molecule in a strong magnetic field. We furthermore show that symmetry can prevent the occurrence of complex energy values. Lastly, we demonstrate that in most cases the real part of the complex energy values provides a very good approximation to the FCI energy.
description: 19 pages, 8 figures
Bethe/Gauge Correspondence for $A_N$ Spin Chains with Integrable Boundaries
Creators: name: Wang, Ziwei
name: Zhu, Rui-Dong
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We continue the survey initiated in arXiv:2012.14197 to explore the Bethe/Gauge correspondence between supersymmetric SO/Sp gauge theories in 2d/3d/4d and open spin chain with integrable boundaries. We collect the known Bethe ansatz equations of different types of spin chains with general boundaries that have been analyzed in the literature, and compare them with the vacua equations of the quiver gauge theories. It seems that not all the vacua equations of quiver gauge theory with BCD-type gauge groups can be realized as some known Bethe ansatz equations of integrable spin chain models.
description: 24+6 pages; Remark added in conclusion section
Verk(n)appte Bilder des "Holocaust"
Creators: name: Zolles, Christian
Publisher: name: Medienimpulse
Year: 2014

description: Ausgehend von der Frage, was es bedeutet, sich auf die Suche nach dem Bild der Shoah zu machen, untersucht Christian Zolles grundlegende formale und emotionale Aspekte, die unser Sehen bzw. Wiedersehen des Völkermords begleiten. Dabei wird eingehend das Verhältnis vonSagbarkeiten und Sichtbarkeiten im Blick auf die Repräsentatio(en) der Shoah diskutiert. Es wird gefolgert, dass dabei medial-panoramatische (es ließe sich auch sagen: paranoische) Strukturen für vereinfachte Verhältnisse sorgen, in die sich jeder eingebunden fühlt. Wir schaffen es also nicht, dem (Massen)Sterben keinen Sinn zu geben.
description: Medienimpulse, Bd. 50 Nr. 1 (2012): 1/2012 - Repräsentation(en) der Shoah
Analytics competence and IT business value: the role of metric ambidexterity
Creators: name: Vijayasarathy, Leo R.
name: Jetley, Gaurav
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Organizations have invested in analytics to understand, predict, and influence phenomena germane to their success. Despite significant investments in analytics, there is a lack of comprehensive, theory-based models explaining how analytics contributes to IT business value through the development and exploitation of metrics. We address this gap by introducing metric ambidexterity – an organization’s ability to simultaneously explore new metrics and exploit existing ones – as a critical mechanism linking analytics competence and analytics culture to enhanced market competence. We test our research model with a matched pair sample of business managers and IT managers. Our results show that the interaction between analytics competence and analytics culture is related to metric ambidexterity, which subsequently affects market competence. Further, by demonstrating metric ambidexterity’s role as a significant mediator between aspects of the analytics environment and market competence, we provide a theory-based model that clarifies the processes through which analytics contributes to IT business value, offering timely insights for organizations seeking to leverage analytics more effectively in an increasingly competitive landscape.
Design and Fabrication of Bond Wire Micro-Magnetics
Creators: name: Macrelli, Enrico <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: ING-INF/01 Elettronica

description: This thesis presents a new approach for the design and fabrication of bond wire magnetics for power converter applications by using standard IC gold bonding wires
and micro-machined magnetic cores. It shows a systematic design and characterization study for bond wire transformers with toroidal and race-track cores for both
PCB and silicon substrates. Measurement results show that the use of ferrite cores increases the secondary self-inductance up to 315 µH with a Q-factor up to 24.5 at
100 kHz. Measurement results on LTCC core report an enhancement of the secondary self-inductance up to 23 µH with a Q-factor up to 10.5 at 1.4 MHz. A resonant DC-DC converter is designed in 0.32 µm BCD6s technology at STMicroelectronics with a depletion nmosfet and a bond wire micro-transformer for EH applications. Measures report that the circuit begins to oscillate from a TEG voltage of 280 mV while starts to convert from an input down to 330 mV to a rectified output of 0.8 V at an input of 400 mV. Bond wire magnetics is a cost-effective approach that enables a flexible design of inductors and transformers with high inductance and high turns ratio. Additionally, it supports the development of magnetics on top of the IC active circuitry for package and wafer level integrations, thus enabling the design of high density power components. This makes possible the evolution of PwrSiP and PwrSoC with reliable highly efficient magnetics.
Ab initio analysis for initial process of Joule heating in semiconductors
Creators: name: Minamitani, Emi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: To investigate the initial process of Joule heating in semiconductors microscopically and quantitatively, we developed a theoretical framework for the ab initio evaluation of the carrier energy relaxation in semiconductors under a high electric field using a combination of the two-temperature model and the Boltzmann equation. We employed the method for bulk silicon as a typical example. Consequently, we found a remarkable difference in the energy relaxation processes of the electron and hole carriers. The longitudinal acoustic and optical phonons at the zone boundary contribute to the energy relaxation of electron carriers, whereas they contribute negligibly to that of the hole carriers. In addition, at the band edge, the energy relaxation rate is maximized for the electron carriers, whereas it is suppressed for the hole carriers. These differences stem from the presence/absence of intervalley scattering processes and isotropic/anisotropic band structures in electrons and holes. Our results lay the foundation for controlling the thermal generation in semiconductors by material design.
description: 29 pages, 7 figures
Changing CO Bands in Near-IR Spectra of CP Cephei
Creators: name: Call, Scott G.
name: Hintz, Eric G.
name: Ardern, Steve
name: Scowcroft, Victoria
name: Morrell, Timothy D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present time-series near-infrared spectra for the classical Cepheid, CP Cephei, from the Astrophysical Research Consortium 3.5-m telescope and near-infrared spectrograph, TripleSpec, at Apache Point Observatory, NM, USA. Spectral observations were made at nine points through the minimum and partway up the ascending portion of the optical light curve for the star. Carbon monoxide (CO) was detected in absorption in the 2.3-$μ$m region for each observation. We measured the strength of CO absorption using the 2-0 band head in the feature for each observation and confirm that the CO varies with pulsation. We show that these measurements follow the $(J-K)$ colour curve, confirming that temperature drives the destruction of CO. By obtaining convolved filter magnitudes from the spectral data we found that the effect of the CO feature on $K$ magnitudes is small, unlike the CO feature in the mid-infrared at 4.5-$μ$m. The dissociation of CO in the near-infrared spectra tracks with the effect seen in the mid-infrared photometric measurements of a similar Galactic Cepheid. Confirmation of the varying CO feature illustrates the need for further investigations into the related mid-infrared period-colour-metallicity relation in order to address the impact of Cepheid metallicities on the Hubble tension.
description: 7 pages, 8 figures; Accepted in MNRAS
Generation of Nano-Catalyst Particles by Spinodal Nano-Decomposition in Perovskite
Creators: name: Kizaki, Hidetoshi
name: Kusakabe, Koichi
name: Nogami, Soichiro
name: Katayama-Yoshida, Hiroshi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A new mechanism of nano-catalyst generation based on the spinodal nano-decomposition in self-regenerating perovskite catalysts for automotive-emissions control is proposed. To demonstrate existence of the spinodal nano-decomposition in real perovskite catalysts, we performed first-principles calculations to evaluate the free energy of La(Fe$_{1-x}$Pd$_x$)O$_3$ and La(Fe$_{1-x}$Rh$_x$)O$_3$. The result indicates appearance of a spinodal region in the phase diagram of each material. Formation of nano-catalyst particles in the perovskite host matrix is crucial for the self-regeneration of perovskite catalyst. Based on the spinodal nano-decomposition model, possible materials are designed for new three-way catalyst with no contents of precious metal.
description: 10 pages, 4 figures
Analytics competence and it business value: the role of metric ambidexterity
Creators: name: Vijayasarathy, Leo R.
name: Jetley, Gaurav
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Organizations have invested in analytics to understand, predict, and influence phenomena germane to their success. Despite significant investments in analytics, there is a lack of comprehensive, theory-based models explaining how analytics contributes to IT business value through the development and exploitation of metrics. We address this gap by introducing metric ambidexterity – an organization’s ability to simultaneously explore new metrics and exploit existing ones – as a critical mechanism linking analytics competence and analytics culture to enhanced market competence. We test our research model with a matched pair sample of business managers and IT managers. Our results show that the interaction between analytics competence and analytics culture is related to metric ambidexterity, which subsequently affects market competence. Further, by demonstrating metric ambidexterity’s role as a significant mediator between aspects of the analytics environment and market competence, we provide a theory-based model that clarifies the processes through which analytics contributes to IT business value, offering timely insights for organizations seeking to leverage analytics more effectively in an increasingly competitive landscape.
Optimizing Convolutional Neural Network Architecture
Creators: name: Balderas, Luis
name: Lastra, Miguel
name: Benítez, José M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Convolutional Neural Networks (CNN) are widely used to face challenging tasks like speech recognition, natural language processing or computer vision. As CNN architectures get larger and more complex, their computational requirements increase, incurring significant energetic costs and challenging their deployment on resource-restricted devices. In this paper, we propose Optimizing Convolutional Neural Network Architecture (OCNNA), a novel CNN optimization and construction method based on pruning and knowledge distillation designed to establish the importance of convolutional layers. The proposal has been evaluated though a thorough empirical study including the best known datasets (CIFAR-10, CIFAR-100 and Imagenet) and CNN architectures (VGG-16, ResNet-50, DenseNet-40 and MobileNet), setting Accuracy Drop and Remaining Parameters Ratio as objective metrics to compare the performance of OCNNA against the other state-of-art approaches. Our method has been compared with more than 20 convolutional neural network simplification algorithms obtaining outstanding results. As a result, OCNNA is a competitive CNN constructing method which could ease the deployment of neural networks into IoT or resource-limited devices.