cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cosmological model with variable vacuum pressure
Creators: name: Jenkovszky, L. L.
name: Zhdanov, V. I.
name: Stukalo, E. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Scenarios of cosmological evolution having inflationary stages are studied by using equations of state (EoS) inspired by the quark bag model. A crucial point is the existence of states where the specific enthalpy of the cosmological fluid vanishes. A large class of barotropic EoS admits, depending upon initial conditions, for a concrete equation of state, analogs of the "Big Rip" as well as solutions describing an exponential inflation followed by the usual matter dominance. We found scalar field potentials that mimic the behavior of the cosmological scale factor in case of special EoS from the above class. Extensions to more general two-parametric EoS are discussed that describe a pre-inflationary evolution.
description: 13 pages, 3 figures
Les lasers à fibre pour applications médicales
Creators: name: Pureur, David
name: Maine, Patrick
Publisher: name: SEE
Year: 2020

description: Le laser à fibre constitue une révolution majeure dans le secteur des lasers. Encore une curiosité scientifique dans les années 1980, ce laser est maintenant établi comme une technologie laser de référence dans de nombreux secteurs tels que le marquage, le micro-usinage, la soudure ou la découpe de matériaux, mais aussi les applications médicales les plus récentes, notamment en ophtalmologie.
Principes et applications des lidars pour l’analyse de l’atmosphère
Creators: name: Cariou, Jean-Pierre
Publisher: name: SEE
Year: 2020

description: L’instrumentation lidar basée sur l’exploitation des échos en retour par le milieu analysé d’émissions laser en continu ou plus souvent impulsionnelles donne lieu à des applications nombreuses dans des domaines variés (climat, environnement, automotive, avionique, etc.). C’est devenu une technique incontournable dans l’analyse fine de l’atmosphère avec des retombées sur les prévisions météorologiques, les études relatives au changement climatique, la mesure du vent et des turbulences atmosphériques.
Efficient algorithms for quantum information bottleneck
Creators: name: Hayashi, Masahito
name: Yang, Yuxiang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ability to extract relevant information is critical to learning. An ingenious approach as such is the information bottleneck, an optimisation problem whose solution corresponds to a faithful and memory-efficient representation of relevant information from a large system. The advent of the age of quantum computing calls for efficient methods that work on information regarding quantum systems. Here we address this by proposing a new and general algorithm for the quantum generalisation of information bottleneck. Our algorithm excels in the speed and the definiteness of convergence compared with prior results. It also works for a much broader range of problems, including the quantum extension of deterministic information bottleneck, an important variant of the original information bottleneck problem. Notably, we discover that a quantum system can achieve strictly better performance than a classical system of the same size regarding quantum information bottleneck, providing new vision on justifying the advantage of quantum machine learning.
description: accepted by Quantum
Le laser X, de l’infiniment petit à la guerre des étoiles
Creators: name: Pape, Sébastien Le
name: Jacquemot, Sylvie
name: Zeitoun, Philippe
Publisher: name: SEE
Year: 2020

description: Quarante ans après la première démonstration d’un effet laser dans le domaine X, le laser X est devenu un outil incontournable grâce à ses propriétés optiques et temporelles pour révéler la structure microscopique de la matière inerte et vivante, conduisant ainsi à de spectaculaires avancées en biologie et en physique de la matière condensée.
Texture of Two Vanishing Subtraces in Neutrino Mass Matrix and Current Experimental Tests
Creators: name: Ismael, A.
name: Lashin, E. I.
name: Chamoun, N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a full phenomenological and analytical study for the neutrino mass matrix characterized by two vanishing $2\times2$ subtraces. We update one past result in light of the recent experimental data. Out of the fifteen possible textures, we find seven cases can accommodate the experimental data instead of eight ones in the past study. We also introduce few symmetry realizations for viable and nonviable textures based on non-abelian ($A_4$ or $S_4$) flavor symmetry within type II seesaw scenario.
description: pdflatex, 57 pages, 10 tables, 9 figures, version to appear in PRD
Skin effect and dynamical delocalization in non-Hermitian quasicrystals with spin-orbit interaction
Creators: name: Chakrabarty, Aditi
name: Datta, Sanjoy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The investigations of the spectral and dynamical delocalization-localization (DL) transition have revealed intriguing features in a wide range of non-Hermitian systems. The present study aims at exploring the spectral and dynamical properties in a non-Hermitian quasiperiodic system with asymmetric hopping in the presence of Rashba Spin-Orbit (RSO) interaction. In particular, in such systems, we have identified that the DL transition is associated with a concurrent change in the energy spectrum, where the eigenstates always break the time-reversal symmetry for all strenghts of the quasiperiodic potential, contrary to the systems without RSO interaction. Remarkably, we find that the reality of energy spectrum under the open boundary condition that is frequently symbolised as a hallmark of the skin-effect, is a system-size dependent phenomena, and appears even when the associated energies are indeed complex. In addition, it is demonstrated that the spin-flip term in the RSO interaction in fact possesses a tendency to diminish the directionality of the skin-effect. On scrutinizing the dynamical attributes in our non-Hermitian system, we unveil that in spite of the fact that the spectral DL transition accords with the dynamical phase transition, interestingly, the system comes across hyper-diffusive and negative diffusion dynamical regimes depending upon the strength of the RSO interaction, in the spectrally localized regime.
description: 13 pages, 13 figures
Discovering and Understanding 2D Semiconductors with High Intrinsic Carrier Mobility at Room Temperature
Creators: name: Zhang, Chenmu
name: Wang, Ruoyu
name: Mishra, Himani
name: Liu, Yuanyue
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) semiconductors have demonstrated great potential for next-generation electronics and optoelectronics. However, the current 2D semiconductors suffer from intrinsically low carrier mobility at room temperature, which significantly limits its applications. Here we discover a variety of new 2D semiconductors with mobility one order of magnitude higher than the current ones. The discovery is made by developing effective descriptors for high-throughput computationally screening of the 2D materials database, followed by using state-of-the-art first principles method to accurately calculate the mobility. Further analyses attribute their exceptional mobilities to small effective mass, high sound velocity, high optical phonon frequency, small ratio of Born charge vs. polarizability, and/or weak electron-phonon coupling. Our work opens up new materials to realize high device performance and/or exotic physics that are difficult to achieve previously, and improves the understanding of the carrier transport mechanism.
Talk: The importance of Computational Reproducibility for an effective science
Creators: name: Lakens, Daniel
Publisher: name: Zenodo
Year: 2020
Subjects: computational reproducibility

description: A PDF of the slides for a talk entitled "The importance of Computational Reproducibility for an effective science", given by Daniel Lakens at the virtual DGPA/DGPs-Symposium "Computational Reproducibility", Nov. 23rd 2020.
Electronic Properties of Graphene Encapsulated with Different Two-Dimensional Atomic Crystals
Creators: name: Kretinin, A. V.
name: Cao, Y.
name: Tu, J. S.
name: Yu, G. L.
name: Jalil, R.
name: Novoselov, K. S.
name: Haigh, S. J.
name: Gholinia, A.
name: Mishchenko, A.
name: Lozada, M.
name: Georgiou, T.
name: Woods, C. R.
name: Withers, F.
name: Blake, P.
name: Eda, G.
name: Wirsig, A.
name: Hucho, C.
name: Watanabe, K.
name: Taniguchi, T.
name: Geim, A. K.
name: Gorbachev, R. V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Hexagonal boron nitride is the only substrate that has so far allowed graphene devices exhibiting micron-scale ballistic transport. Can other atomically flat crystals be used as substrates for making quality graphene heterostructures? Here we report on our search for alternative substrates. The devices fabricated by encapsulating graphene with molybdenum or tungsten disulphides and hBN are found to exhibit consistently high carrier mobilities of about 60,000 cm$^{2}$V$^{-1}$s$^{-1}$. In contrast, encapsulation with atomically flat layered oxides such as mica, bismuth strontium calcium copper oxide and vanadium pentoxide results in exceptionally low quality of graphene devices with mobilities of ~ 1,000 cm$^{2}$ V$^{-1}$s$^{-1}$. We attribute the difference mainly to self-cleansing that takes place at interfaces between graphene, hBN and transition metal dichalcogenides. Surface contamination assembles into large pockets allowing the rest of the interface to become atomically clean. The cleansing process does not occur for graphene on atomically flat oxide substrates.
description: 19 pages, 11 figures, 1 table including Supporting Information
Microbial epidemiology and clinical risk factors of carbapenemase-producing Enterobacterales amongst Irish patients from first detection in 2009 until 2020
Creators: name: O'Connell, Nuala H.
name: Gasior, S.
name: Slevin, B.
name: Power, L.
name: Barrett, S.
name: Bhutta, S.I.
name: Powell, J.
name: DUNNE, COLUM
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences

description: BackgroundCarbapenemase producing Enterobacterales (CPE) are major public health threats.AimTo review microbial epidemiology of CPE, as well as clinical risk factors and infections, amongst CPE positive patients over 12 years in an Irish tertiary hospital.MethodsRetrospective observational study of data extracted from a laboratory CPE database, electronic healthcare records and manual review of patient charts. Common risk factors, treatment regimens for all CPE related infections, and clinical outcomes were ascertained.FindingsAmong CPE strains isolated from 460 patients, Klebsiella pneumoniae carbapenemase (KPC) was the carbapenemase most frequently detected, accounting for 87.4% (459) of all CPE enzymes. Citrobacter species 177 (33.7%) were the most common species harbouring this enzyme. 428 CPE positive patients (93%) were identified in the acute hospital setting; the most common risk factor for CPE acquisition was history of hospitalisation, observed in 305 (66%) cases. Thirty patients (6.5%) had confirmed infections post-acquisition, of which four were bloodstream infections. There were 19 subsequent episodes of non CPE-related bacteraemia in this cohort. All causal mortality at 30 days was 41 patients (8.9%). However, clinical review determined that CPE was an indirect associative factor in 8 patient deaths.ConclusionsIn this tertiary hospital setting, microbial epidemiology is changing; with both OXA-48 enzymes and KPC-producing Citrobacter species becoming more prevalent. Whilst the burden of CPE related infections, especially bacteraemia, was low over the study period, it remains critical that basic infection prevention and control practices are adhered to lest the observed changes in epidemiology result in an increase in clinical manifestations.
Is magic texture for Majorana neutrino immanent in Dirac nature?
Creators: name: Hyodo, Yuta
name: Kitabayashi, Teruyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The magic textures are successful candidates of the correct texture for the Majorana neutrinos. In this study, we show that some types of magic texture for Majorana neutrinos approximately immanent in the flavor mass matrix for Dirac neutrinos. In addition, it turned out that the normal mass ordering of the Dirac neutrino masses is slightly preferable to the inverted mass ordering in the context of the magic textures.
description: 12 pages, 2 figures
AGT, Burge pairs and minimal models
Creators: name: Bershtein, M.
name: Foda, O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the AGT correspondence in the context of the conformal field theory $M^{\, p, p^{\prime}}$ $\otimes$ $M^{H}$, where $M^{\, p, p^{\prime}}$ is the minimal model based on the Virasoro algebra $V^{\, p, p^{\prime}}$ labeled by two co-prime integers $\{p, p^{\prime}\}$, $1 < p < p^{\prime}$, and $M^{H}$ is the free boson theory based on the Heisenberg algebra $H$. Using Nekrasov's instanton partition functions without modification to compute conformal blocks in $M^{\, p, p^{\prime}}$ $\otimes$ $M^{H}$ leads to ill-defined or incorrect expressions. Let $B^{\, p, p^{\prime}, H}_n$ be a conformal block in $M^{\, p, p^{\prime}}$ $\otimes$ $M^{H}$, with $n$ consecutive channels $χ_{i}$, $i = 1, \cdots, n$, and let $χ_{i}$ carry states from $H^{p, p^{\prime}}_{r_{i}, s_{i}}$ $\otimes$ $F$, where $H^{p, p^{\prime}}_{r_{i}, s_{i}}$ is an irreducible highest-weight $V^{\, p, p^{\prime}}$-representation, labeled by two integers $\{r_{i}, s_{i}\}$, $0 < r_{i} < p$, $0 < s_{i} < p^{\prime}$, and $F$ is the Fock space of $H$. We show that restricting the states that flow in $χ_{i}$ to states labeled by a partition pair $\{Y_1^{i}, Y_2^{i}\}$ such that $Y^{i}_{2, {\tt R}} - Y^{i}_{1, {\tt R} + s_{i} - 1} \geq 1 - r_{i}$, and $Y^{i}_{1, {\tt R}} - Y^{i}_{2, {\tt R} + p^{\prime} - s_{i} - 1} \geq 1 - p + r_{i}$, where $Y^{i}_{j, {\tt R}}$ is row-${\tt R}$ of $Y^{i}_j, j \in \{1, 2\}$, we obtain a well-defined expression that we identify with $B^{\, p, p^{\prime}, H}_n$. We check the correctness of this expression for ${\bf 1.}$ Any 1-point $B^{\, p, p^{\prime}, H}_1$ on the torus, when the operator insertion is the identity, and ${\bf 2.}$ The 6-point $B^{\, 3, 4, H}_3$ on the sphere that involves six Ising magnetic operators.
description: 22 pages. Simplified the presentation
Kunst- und Musikunterricht im digitalen Wandel
Creators: name: Heye, Andreas
name: Voit, Johannes
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: Das Editorial führt in das Themenheft „Kunst- und Musikunterricht im digitalen Wandel – Konzepte und Materialien für die Lehrer*innenaus- und -weiterbildung“ ein. Zunächst werden aktuelle bildungspolitische Maßnahmen im Zuge der Digitalisierung skizziert. Dazu zählt auch das Verbundprojekt Communities of Practice NRW – für eine Innovative Lehrerbildung (COMeIN), in dessen Rahmen das vorliegende Themenheft entstanden ist. Das Editorial schließt mit einem Überblick über die insgesamt acht in diesem Themenheft versammelten Beiträge.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 4 (2022): Kunst- und Musikunterricht im digitalen Wandel – Konzepte und Materialien für die Lehrer*innenaus- und -weiterbildung
La maison intelligente et connectée
Introduction : De la domotique à la maison intelligente et connectée
Creators: name: Hauet, Jean-Pierre
Publisher: name: SEE
Year: 2020

description: La maison intelligente et connectée, ou smart home, est l’héritière de la domotique née dans les années 1980. Elle en revisite le concept en intégrant les technologies qui se sont développées depuis lors, en adoptant une approche holistique du système « maison » et même hyper-holistique par ses liens avec la mobilité, le lieu de travail, le réseau électrique et le quartier.
title: ÖR-Examensklausur zum Verfassungsrecht
title: Berliner Mietendeckel
titleType: Subtitle
Creators: name: Könneke, Anne Marleen
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: 340 Recht

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers (De Gruyter) frei zugänglich.
description: Die Klausur thematisiert die vom Bundesverfassungsgericht zwischenzeitlich verneinte Verfassungsmäßigkeit des »Berliner Mietendeckels«, eingekleidet in eine abstrakte Normenkontrolle vor einem Landesverfassungsgericht. Während die Klausurbearbeiter bzgl. deren Zulässigkeitsvoraussetzungen sowie einem möglichen Verstoß gegen die Eigentumsgarantie und das Rückwirkungsverbot weitgehend auf ihre Kenntnisse zum Verfassungsrecht (des Bundes) zurückgreifen können, ist bei der Frage nach dem Prüfungsumfang eines Landesverfassungsgerichts Problembewusstsein und Argumentation gefragt.
La Maison connectée bas carbone, vitrine des ambitions d’EDF dans le secteur résidentiel
Creators: name: Gastiger, Frédéric
Publisher: name: SEE
Year: 2020

description: Engagé dans la transition énergétique, le Groupe EDF aide ses clients particuliers à mieux et moins consommer. Comment EDF peut-il saisir les opportunités offertes par le concept de maison connectée pour apporter confort et économies à ses clients ?
Effects of modified gravity on B-mode polarization
Creators: name: Amendola, Luca
name: Ballesteros, Guillermo
name: Pettorino, Valeria
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the impact of modified gravity on B-modes, identifying two main separate effects: lensing and propagation of tensor modes. The location of the inflationary peak of the BB spectrum depends on the speed of gravitational waves; the amplitude of the lensing contribution depends on the anisotropic stress. We single out these effects using the quasi-static regime and considering models for which the background and the growth of matter perturbations are standard. Using available data we obtain that the gravitational wave speed is compatible with the speed of light and constrained to within about 10%.
description: 15 pages, 8 figures. Discussion expanded. Typos corrected. To appear in Phys. Rev. D
Ethics approval form template for Surveying Open Data Practices
Creators: name: Bezuidenhout, Louise
Publisher: name: Zenodo
Year: 2020

description: This is the CUREC form used for the 2020 survey of Open Data practices (Burkina Faso, Senegal, Ethiopia, Uganda, Malawi, Mozambique, Botswana, Zimbabwe). The text of this form can be used by researchers wishing to re-use the survey tool.
Generation of bright collimated vortex $γ$-ray via laser driven cone-fan target
Creators: name: Zhang, Cui-Wen
name: Bake, Mamat-Ali
name: Xiao, Hong
name: Sang, Hai-Bo
name: Xie, Bai-Song
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We use numerical simulations to demonstrate that a source of bright collimated vortex $γ$-ray with large orbital angular momentum can be achieved by irradiating a circularly polarized laser with an intensity about $10^{22}\rm{W/{cm^2}}$ on a cone-fan target. In the studied setup, electron beam of energy of hundreds of MeV and vortex laser pulse are formed. And furthermore a high quality vortex $γ$-ray is yielded with small divergence of $5^{\circ}$ and high peak brilliance $\sim5\times10^{22}$ photons ${\rm\cdot s^{-1} \cdot mm^{-2} \cdot mrad^{-2}}$ $0.1\%\mathrm{BW}$ at $10\mathrm{MeV}$. A considerable fraction of angular momentum of laser is converted to electron beam and vortex $γ$-ray, which are roughly $27.8\%$ and $3\%$, respectively. And the conversion efficiency of energy from laser to electron beam and vortex $γ$-ray are around $41\%$ and $3.8\%$. Moreover, comparative simulations for different right radius of cone reveal that there exists an optimal size that makes the highest angular momentum of $γ$-ray photons to be around $2.8\times10^6\hbar$. The comparative simulations for different laser modes exhibit that it is more appropriate to choose the circularly polarized laser to generate vortex $γ$-ray than the Laguerre-Gaussian one.
description: 18 pages, 9 figures
Auf Bärenjagd – intermedial
Creators: name: Büring, Ute
name: Büring, Markus
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: Das hier vorgestellte Material gibt Einblicke in das fächerverbindende Projekt (Kunst, Musik, Englisch) „Auf Bärenjagd“ mit einer fünften Gymnasialklasse und Lehramtsstudierenden des Faches Musik. Das Projekt zielte darauf ab, das Erzählgedicht „Weʼre going on a bear hunt“ (Rosen, 1989) für Schüler*innen ästhetisch erfahrbar zu machen (sprachlich, performativ, künstlerisch und musikalisch). Einige der inszenierten Erfahrungsprozesse waren darüber hinaus intermedial angelegt, sodass ästhetische Wahrnehmungen dokumentiert, Transformationsschritte reflektiert und ästhetische Entscheidungen rekonstruiert werden konnten. Auf diese Weise entstanden im Kunstunterricht Storyboards zur Visualisierung der Handlungsschritte des Gedichts sowie Druckgrafiken, die später im musikpädagogischen Seminar als Vorlage von Videoanimationen dienten. Parallel zum Kunstunterricht wurden im Musikunterricht die akustischen Dimensionen einer Verklanglichung des Gedichts erarbeitet mit ihren Ebenen Dialog (englische Sprache mit onomatopoetischen Anteilen und musikalischem Ausdruck), Sound (musikalisierte Sprachgeräusche, Vokalklänge ohne semantischen Gehalt) und Klang (analog instrumental, analog Bodypercussion). Im Seminar erprobten Studierende auch den Umgang mit Digitalloops zur Verklanglichung. Die intermediale Arbeitsweise des Projekts, durch stetige Wechsel von performativen, sprachlichen, künstlerischen und musikalischen Dimensionen und Digitalisierungsprozessen immer wieder Rückkopplungen zum Bildausdruck oder den Ebenen akustischer Gestaltung zu generieren, hat sich als sehr förderlich für die mehrdimensionale Erschließung des Gedichts dargestellt. Dramaturgische Handlungsschritte sowie Introspektionen in die handelnden Figuren konnten dadurch intensiviert erfahren und vielschichtiger gestaltet werden. Für die Schüler*innen eröffneten Digitalisierungsprozesse als Übergänge „analog–digital“ neue Perspektiven in Bezug auf ihre musikalisch-künstlerischen Entscheidungen und regten die Wahrnehmungen und Reflexionen der Lernprozesse an. Die so entstandene Relevanz für die Kinder fand unmittelbaren ästhetischen Ausdruck in ihrem performativen, künstlerischen und musikalischen Arbeiten.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 4 (2022): Kunst- und Musikunterricht im digitalen Wandel – Konzepte und Materialien für die Lehrer*innenaus- und -weiterbildung
La convergence bâtiment-mobilité
Les véhicules électriques, de nouveaux équipements électro-digitaux au service des bâtiments et inversement
Creators: name: Quenard, Daniel
Publisher: name: SEE
Year: 2020

description: Aujourd’hui, plus de 95 % du temps, les véhicules particuliers sont à l’arrêt. Alors demain, avec le développement de l’électrification et du numérique, ces véhicules pourront-ils devenir des équipements électro-digitaux au service des bâtiments et de leurs occupants et participer à la réduction des émissions de GES et de la pollution ?
Augmented Reality im Musikunterricht
Creators: name: Voit, Johannes
name: Heye, Andreas
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: Während der primäre Einsatzbereich von Augmented-Reality-Anwendungen (AR) nach wie vor im Bereich Computer- und Videospiele liegt, wird diese Technologie nur in verhältnismäßig geringem Maße in Bildungskontexten eingesetzt. Gleichwohl handelt es sich bei Virtual-Reality-Anwendungen (VR) um eine mutmaßlich positiv besetzte Technologie, die Kindern und Jugendlichen vor allem aus dem Freizeitbereich bekannt ist und deren Integration in den Musikunterricht sowohl Lebensweltorientierung mit Blick auf das Mediennutzungsverhalten junger Menschen als auch neue Möglichkeiten für musikbezogenes Lehren und Lernen verspricht. In diesem Beitrag werden Materialien aus einem Workshopkonzept zum Thema Hören präsentiert, die angehenden Lehrkräften Anregungen bieten sollen, das Potenzial von AR-Musik-Apps im Musikunterricht kritisch zu reflektieren und zu diskutieren. Erfahrungen aus dem exemplarischen Einsatz der AR-Musik-Apps WalkThruMusic, Konzerthaus Plus und Beethooven: Fol­ge der Musik werden illustriert.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 4 (2022): Kunst- und Musikunterricht im digitalen Wandel – Konzepte und Materialien für die Lehrer*innenaus- und -weiterbildung
Lessons from $f(R,R_c^2,R_m^2, L_m)$ gravity: Smooth Gauss-Bonnet limit, energy-momentum conservation and nonminimal coupling
Creators: name: Tian, David Wenjie
name: Booth, Ivan
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper studies a generic fourth-order theory of gravity with Lagrangian density $f(R,R_c^2,R_m^2, \mathscr{L}_m)$. By considering explicit $R^2$ dependence and imposing the "coherence condition" $f_{R^2}\!=\!f_{R_m^2}\!=\! -f_{R_c^2}/4$, the field equations of $f(R,R^2,R_c^2,R_m^2, \mathscr{L}_m)$ gravity can be smoothly reduced to that of $f(R,\mathcal{G},\mathscr{L}_m)$ generalized Gauss-Bonnet gravity. We use Noether's conservation law to study the $f(\mathcal{R}_1,\mathcal{R}_2\ldots,\mathcal{R}_n,\mathscr{L}_m)$ model with nonminimal coupling between $\mathscr{L}_m$ and Riemannian invariants $ \mathcal{R}_i$, and conjecture that the gradient of nonminimal gravitational coupling strength $\nabla^μf_{\!\mathscr{L}_m}$ is the only source for energy-momentum non-conservation. This conjecture is applied to the $f(R,R_c^2,R_m^2, \mathscr{L}_m)$ model, and the equations of continuity and non-geodesic motion of different matter contents are investigated. Finally, the field equation for Lagrangians including the traceless-Ricci square and traceless-Riemann (Weyl) square invariants is derived, the $f(R,R_c^2,R_m^2, \mathscr{L}_m)$ model is compared with the $f(R,R_c^2,R_m^2,T)+2κ\mathscr{L}_m$ model, and consequences of nonminimal coupling for black hole and wormhole physics are considered.
description: Final version: 29 pages, 1 table, modified RevTex format in one column. To appear in Physical Review D
Jet contributions to the broad-band spectrum of Cyg X-1 in the hard state
Creators: name: Zdziarski, Andrzej A.
name: Pjanka, Patryk
name: Sikora, Marek
name: Stawarz, Lukasz
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We apply the jet model developed in the preceding paper of Zdziarski et al. to the hard-state emission spectra of Cyg X-1. We augment the model for the analytical treatment of the particle evolution beyond the energy dissipation region, and allow for various forms of the acceleration rate. We calculate the resulting electron and emission spectra as functions of the jet height, along with the emission spectra integrated over the outflow. The model accounts well for the observed radio, infrared, and GeV fluxes of the source, although the available data do not provide unique constraints on the model free parameters. The contribution of the jet emission in the UV--to--X-ray range turns out to be in all the cases negligible compared to the radiative output of the accretion component. Nevertheless, we find out that it is possible to account for the observed flux of Cyg X-1 at MeV energies by synchrotron jet emission, in accord with the recent claims of the detection of strong linear polarization of the source in that range. However, this is possible only assuming a very efficient particle acceleration leading to the formation of flat electron spectra, and jet magnetic fields much above the equipartition level.
description: MNRAS, in press
Quantum superpositions of Minkowski spacetime
Creators: name: Foo, Joshua
name: Arabaci, Cemile Senem
name: Zych, Magdalena
name: Mann, Robert B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Within any anticipated unifying theory of quantum gravity, it should be meaningful to combine the fundamental notions of quantum superposition and spacetime to obtain so-called "spacetime superpositions": that is, quantum superpositions of different spacetimes not related by a global coordinate transformation. Here we consider the quantum-gravitational effects produced by superpositions of periodically identified Minkowski spacetime (i.e.\ Minkowski spacetime with a periodic boundary condition) with different characteristic lengths. By coupling relativistic quantum matter to fields on such a spacetime background (which we model using the Unruh-deWitt particle detector model), we are able to show how one can in-principle "measure" the field-theoretic effects produced by such a spacetime. We show that the detector's response exhibits discontinuous resonances at rational ratios of the superposed periodic length scale.
description: 7+4 pages, 3 figures
Les défis techniques du déploiement d’un réseau radio dans la maison intelligente
Creators: name: Cibaud, David
name: Armand, David
name: Jean-Michel Bonnnamy
name: Dussaume, Philippe
name: Fontaine, Fabrice
name: Jean-Philippe Javaudin
name: Dizes, Maël Le
Publisher: name: SEE
Year: 2020

description: Dans chaque domicile, le nombre de terminaux connectés est en continuelle croissance afin de fournir aux occupants un ensemble de plus en plus riche de services. Ces terminaux mettent en œuvre diverses technologies sans fil et chacun d’entre eux, quelle que soit la pièce dans lequel il est positionné, doit bénéficier d’une qualité de signal radio suffisante pour assurer une expérience utilisateur satisfaisante.
Le Smart Home: levier nécessaire à l’évolution du quartier de la ville ?
Creators: name: François, Emmanuel
Publisher: name: SEE
Year: 2020

description: Nous évoluons vers un univers dans lequel tout citoyen, tout bâtiment, toute mobilité, tout équipement et infrastructure, tout territoire sera connecté. Cette évolution s’est accélérée avec la crise sanitaire actuelle qui a exigé que l’on passe brutalement au télétravail, aux vidéoconférences, à la télémédecine, à la formation en ligne... Le citoyen est au cœur de cette transition. Dans ce contexte, la maison individuelle intelligente (Smart Home), devient la brique de base du quartier connecté (Smart District), permettant de partager les services et les ressources dans la ville et le territoire de demain.
Un point de vue sur les technologies dans la maison au service de la transition énergétique
Creators: name: Lemerle, Stéphane
Publisher: name: SEE
Year: 2020

description: Gros consommateurs d’énergie finale, le logement et le bâtiment professionnel sont au cœur de la transition énergétique. Fournir aux occupants et gestionnaires des solutions de contrôle et d’optimisation de ces consommations est donc essentiel et aider ses occupants à changer leurs habitudes de consommation l’est tout autant.
Mapache: a flexible pipeline to map ancient DNA
Creators: name: Neuenschwander, Samuel
name: Dávalos, Diana I. Cruz
name: Anchieri, Lucas
name: da Mota, Bárbara Sousa
name: Bozzi, Davide
name: Rubinacci, Simone
name: Delaneau, Olivier
name: Rasmussen, Simon
name: Malaspinas, Anna-Sapfo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Summary: Mapping ancient DNA to a reference genome is challenging as it involves numerous steps, is time-consuming and has to be repeated within a study to assess the quality of extracts and libraries; as a result, the mapping needs to be automatized to handle large amounts of data in a reproducible way. We present mapache, a flexible, robust, and scalable pipeline to map, quantify and impute ancient and present-day DNA in a reproducible way. Mapache is implemented in the workflow manager Snakemake and is optimized for low-space consumption, allowing to efficiently (re)map large data sets such as reference panels and multiple extracts and libraries.
description: Availability: Mapache is freely available on GitHub (https://github.com/sneuensc/mapache). Supplementary information: An extensive manual is provided at https://github.com/sneuensc/mapache/wiki
On noncooperative $n$-player principal eigenvalue games
Creators: name: Befekadu, Getachew K.
name: Antsaklis, Panos J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 34D05, 34D10, 34D20, 47A06, 47H10, 91A10, 93B60

description: We consider a noncooperative $n$-player principal eigenvalue game which is associated with an infinitesimal generator of a stochastically perturbed multi-channel dynamical system -- where, in the course of such a game, each player attempts to minimize the asymptotic rate with which the controlled state trajectory of the system exits from a given bounded open domain. In particular, we show the existence of a Nash-equilibrium point (i.e., an $n$-tuple of equilibrium linear feedback operators) that is distinctly related to a unique maximum closed invariant set of the corresponding deterministic multi-channel dynamical system, when the latter is composed with this $n$-tuple of equilibrium linear feedback operators.
description: 4 Pages
Coleman-de Luccia instanton in dRGT massive gravity
Creators: name: Zhang, Ying-li
name: Saito, Ryo
name: Yeom, Dong-han
name: Sasaki, Misao
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the Coleman-de Luccia (CDL) instanton characterizing the tunneling from a false vacuum to the true vacuum in a semi-classical way in dRGT (deRham-Gabadadze-Tolley) massive gravity theory, and evaluate the dependence of the tunneling rate on the model parameters. It is found that provided with the same physical Hubble parameters for the true vacuum $H_{\rm T}$ and the false vacuum $H_{\rm F}$ as in General Relativity (GR), the thin-wall approximation method implies the same tunneling rate as GR. However, deviations of tunneling rate from GR arise when one goes beyond the thin-wall approximation and they change monotonically until the Hawking-Moss (HM) case. Moreover, under the thin-wall approximation, the HM process may dominate over the CDL one if the value for the graviton mass is larger than the inverse of the radius of the bubble.
description: v2, references and one comment added, 19 pages, 5 figures
Tunable liquid-solid hybrid thermal metamaterials with a topology transition
Creators: name: Jin, Peng
name: Liu, Jinrong
name: Xu, Liujun
name: Wang, Jun
name: Ouyang, Xiaoping
name: Jiang, Jian-Hua
name: Huang, Jiping
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Thermal metamaterials provide rich control of heat transport which is becoming the foundations of cutting-edge applications ranging from chip cooling to biomedical. However, due to the fundamental laws of physics, the manipulation of heat is much constrained in conventional thermal metamaterials where effective heat conduction with Onsager reciprocity dominates. Here, through the inclusion of thermal convection and breaking the Onsager reciprocity, we unveil a regime in thermal metamaterials and transformation thermotics that goes beyond effective heat conduction. By designing a liquid-solid hybrid thermal metamaterial, we demonstrate a continuous switch from thermal cloaking to thermal concentration in one device with external tuning. Underlying such a switch is a topology transition in the virtual space of the thermotic transformation which is achieved by tuning the liquid flow via external control. These discoveries illustrate the extraordinary heat transport in complex multi-component thermal metamaterials and pave the way toward an unprecedented regime of heat manipulation.
Une vision concrète du logement connecté
Des solutions éco-compatibles, au service des occupants
Creators: name: Sagnes, Mickael
Publisher: name: SEE
Year: 2020

description: La gestion de l’énergie dans les bâtiments et les logements en particulier doit à présent contribuer à la transition vers une économie zéro carbone. Il faut pour cela disposer de solutions et de produits connectés assurant de nouvelles fonctionnalités.
Kunstdidaktik vernetzen
Creators: name: Schmidt, Rebekka
name: Waffner-Labonde, Annika
name: Welzel, Jana
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: Fortbildungen spielen eine essenzielle Rolle für die professionelle Kompetenz von Lehrkräften (Lipowsky, 2010) und beschreiben ein grundsätzliches professionelles Verständnis des Lehrberufs (Richter et al., 2018). Dies gewinnt besonders dann an Bedeutung, wenn es gilt, gesellschaftliche Veränderungen wie Digitalisierung und Inklusion in den Unterricht einzubeziehen. Die Professur Kunstdidaktik mit besonderer Berücksichtigung von Inklusion sieht daher ein wichtiges Aufgabenfeld darin, regelmäßig Fortbildungen für Lehrkräfte der Region anzubieten. Aktuell liegt der Schwerpunkt dabei u.a. auf der Gestaltung von Kunstunterricht in einer digital geprägten Welt. Dieser Beitrag skizziert das Fortbildungskonzept ausgehend von den zwei übergeordneten Zielen, einerseits aktuelle Forschungsergebnisse aus der Kunstpädagogik für Lehrkräfte zugänglich zu machen und mit ihrer schulpraktischen Erfahrung in Verbindung zu bringen sowie andererseits eine ausbaufähige Beziehung zwischen Hochschule und Schule im Fach Kunst zu etablieren, die auch weit über das Studium hinaus Mehrwert und Synergien hervorbringen kann. Unter Berücksichtigung des für Fortbildungen angepassten Angebots-Nutzungs-Modells (Lipowsky, 2010), das sich auch für die Kunstdidaktik anwenden lässt, werden strukturelle, inhaltliche und didaktische Merkmale beschrieben, die das Erreichen dieser Ziele unterstützen. Die Konkretisierung dieser Überlegungen erfolgt exemplarisch anhand einer durchgeführten Veranstaltung, die durch die Auseinandersetzung mit digitalen Möglichkeiten für Reflexionsprozesse im Kunstunterricht u.a. das Thema des digitalen Wandels mit aufgenommen hat. Anschließend werden anhand von Evaluationsergebnissen aus vier Jahren Gelingensbedingungen für den Aufbau eines Fortbildungsprogramms entwickelt, aus denen sich auch Schlussfolgerungen für andere Konzepte in Bezug auf die genannten Ziele ziehen lassen.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 4 (2022): Kunst- und Musikunterricht im digitalen Wandel – Konzepte und Materialien für die Lehrer*innenaus- und -weiterbildung
Natural and Multi-Natural Inflation in Axion Landscape
Creators: name: Higaki, Tetsutaro
name: Takahashi, Fuminobu
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a landscape of many axions, where the axion potential receives various contributions from shift symmetry breaking effects. We show that the existence of the axion with a super-Planckian decay constant is very common in the axion landscape for a wide range of numbers of axions and shift symmetry breaking terms, because of the accidental alignment of axions. The effective inflation model is either natural or multi-natural inflation in the axion landscape, depending on the number of axions and the shift symmetry breaking terms. The tension between BICEP2 and Planck could be due to small modulations to the inflaton potential or steepening of the potential along the heavy axions after the tunneling. The total duration of the slow-roll inflation our universe experienced is not significantly larger than $60$ if the typical height of the axion potentials is of order $(10^{16-17}{\rm \,GeV})^4$.
description: 19 pages, 4 figures. v4: a version published in JHEP
Postdigitale Medienkultur in der Hochschullehre
Creators: name: Klein, Kristin
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: In der Perspektive postdigitaler Kunst- und Bildungstheorie sind digitale Tools an Praktiken, soziale Räume und gesellschaftliche Strukturen geknüpft und nicht als losgelöste technische Phänomene zu verstehen. Postdigitale Medienkultur in der Hochschule bedeutet daher konsequenterweise, Digitalisierung auch im Hinblick auf soziokulturelle Verflechtungen zu adressieren. Diese Perspektive ist grundlegend für das Workbook Arts Education (http://myow.org/), das in seiner Struktur, Funktion und Programmatik vorgestellt wird. An einem Beispiel zur künstlerischen Arbeit mit GoogleStreetView wird verdeutlicht, wie hybride kunst- und mediendidaktische Ansätze ein vielschichtiges Verständnis von Digitalität befördern können.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 4 (2022): Kunst- und Musikunterricht im digitalen Wandel – Konzepte und Materialien für die Lehrer*innenaus- und -weiterbildung
Digitales Management im Kunstunterricht der Grundschule
Creators: name: Kathke, Petra
name: Schwarma, Sina
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: Anhand einer Unterrichtseinheit im zweiten Schuljahr wird exemplarisch dargestellt, wie digitales Klassenmanagement grundschulspezifischen Leitgedanken des Kunstunterrichts zuarbeitet, sie unterläuft oder inhaltlich modelliert. Neben der didaktischen Passung im Präsenz-, Wechsel- oder Hybridunterricht interessiert zugleich, wie der zeit- und ressourcensparende Einsatz digitaler Tools in der kunstpädagogischen Praxis vor Ort mit Inhalten und Kompetenzanforderungen fachdidaktischer Hochschullehre synchronisierbar ist. Die von einer Grundschullehrerin geschilderten Vorgehensweisen in Phasen der Unterrichtsplanung, -durchführung und -reflexion werden daher kommentierend mit der Frage verknüpft, welche digitalen Strategien Studierende für ein von kunstdidaktischen Entscheidungsparametern und fachtheoretischen Argumentationen geleitetes Klassenmanagement kennen und erproben sollten.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 4 (2022): Kunst- und Musikunterricht im digitalen Wandel – Konzepte und Materialien für die Lehrer*innenaus- und -weiterbildung
From the fringes into mainstream politics: intermediary networks and movement-party coordination of a global anti-immigration campaign in Germany
Creators: name: Klinger, Ulrike
name: Bennett, W. Lance
name: Knüpfer, Curd Benjamin
name: Martini, Franziska
name: Zhang, Xixuan
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Political communication
subject: extremism
subject: political movements
subject: network analysis
subject: social media
subject: Germany
subject: 000 Informatik, Informationswissenschaft, allgemeine Werke::070 Publizistische Medien, Journalismus, Verlagswesen::070 Publizistische Medien, Journalismus, Verlagswesen

description: Many liberal democracies have witnessed the rise of radical right parties and movements that threaten liberal values of tolerance and inclusion. Extremist movement factions may promote inflammatory ideas that engage broader publics, but party leaders face dilemmas of endorsing content from extremist origins. However, when that content is shared over larger intermediary networks of aligned supporters and media sites, it may become laundered or disconnected from its original sources so that parties can play it back as official communication. With a dynamic network analysis and various-time series analysis we tracked content flows from the German version of a global far-right anti-immigration campaign across different media platforms, including YouTube, Twitter, and collections of far-right and mainstream media sites. The analysis shows how content from the small extremist Identitarian Movement spread over expanding networks of low-level activists of the Alternative for Germany party and far-right alternative media sites. That network bridging enabled party leadership to launder the source of the content and roll out its own version of the campaign. As a result, national attention became directed to extremist ideas.
Performance and Robustness Analysis of Stochastic Jump Linear Systems using Wasserstein metric
Creators: name: Lee, Kooktae
name: Halder, Abhishek
name: Bhattacharya, Raktim
Publisher: name: arXiv
Year: 2014
Subjects: subject: Systems and Control (eess.SY)
subject: Probability (math.PR)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: This paper focuses on the performance and the robustness analysis of stochastic jump linear systems. The state trajectory under stochastic jump process becomes random variables, which brings forth the probability distributions in the system state. Therefore, we need to adopt a proper metric to measure the system performance with respect to stochastic switching. In this perspective, Wasserstein metric that assesses the distance between probability density functions is applied to provide the performance and the robustness analysis. Both the transient and steady-state performance of the systems with given initial state uncertainties can be measured in this framework. Also, we prove that the convergence of this metric implies the mean square stability. Overall, this study provides a unifying framework for the performance and the robustness analysis of general stochastic jump linear systems, but not necessarily Markovian jump process that is commonly used for stochastic switching. The practical usefulness and efficiency of the proposed method are verified through numerical examples.