cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Glued CaWO4 Detectors for the CRESST-II Experiment
Creators: name: Kiefer, Michael
name: Pröbst, Franz
name: Angloher, Godehard
name: Bavykina, Irina
name: Hauff, Dieter
name: Seidel, Wolfgang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Cryogenic Rare Event Search with Superconducting Thermometers Phase II (CRESST-II) at the L.N.G.S in Italy is searching for Dark Matter using low-temperature calorimeters. These detectors allow to discriminate different particles by simultaneous measurement of phonons and scintillation light. The sensors used consist of superconducting tungsten thin-film thermometers, which measure the thermal effect of the phonons created in an attached absorber crystal. It has been observed that the scintillation of the CaWO4 absorber degrades during the process of depositing the tungsten film. In order to prevent this, a new technique for producing the detectors was investigated. This technique might also be valuable by expanding the range of scintillator materials suitable for producing a Dark Matter detector.
description: To appear in the proceedings of CryoScint08 (http://cryoscint08.in2p3.fr), Univ. Lyon 1, France, June 6th 2008, P. Di Stefano (IPN Lyon) and F. Petricca (MPP Munich) eds. 6 pages, 10 figures Version 2: Added I. Bavykina to the authors list
Single top quark photoproduction at the LHC
Creators: name: de Jeneret, J. de Favereau
name: Ovyn, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: High-energy photon-proton interactions at the LHC offer interesting possibilities for the study of the electroweak sector up to TeV scale and searches for processes beyond the Standard Model. An analysis of the W associated single top photoproduction has been performed using the adapted MadGraph/MadEvent and CalcHEP programs interfaced to the Pythia generator and a fast detector simulation program. Event selection and suppression of main backgrounds have been studied. A comparable sensitivity to |V_{tb}| to those obtained using the standard single top production in pp collisions has been achieved already for 10 fb^{-1} of integrated luminosity. Photoproduction at the LHC provides also an attractive framework for observation of the anomalous production of single top due to Flavour-Changing Neutral Currents. The sensitivity to anomalous coupling parameters, k_{tuγ} and k_{tcγ} is presented and indicates that stronger limits can be placed on anomalous couplings after 1 fb^{-1}.
Rezension: Godard trifft Truffaut
Creators: name: Baschiera, Julia Philomena
Publisher: name: Medienimpulse
Year: 2014

description: Medienimpulse, Bd. 52 Nr. 1 (2014): 1/2014 - Display/Aktuelle Dynamiken und Herausforderungen kuratorischer und vermittelnder Praxis
Rezension: Romy & Alain. Eine Amour fou
Creators: name: Rogy, Raffaela
Publisher: name: Medienimpulse
Year: 2014

description: Medienimpulse, Bd. 52 Nr. 1 (2014): 1/2014 - Display/Aktuelle Dynamiken und Herausforderungen kuratorischer und vermittelnder Praxis
Multiconfiguration Dirac-Hartree-Fock energy levels and transition probabilities for 3d^5 in Fe IV
Creators: name: Fischer, C. Froese
name: Rubin, R. H.
name: Rodríguez, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Multiconfiguration Dirac-Hartree-Fock electric quadrupole (E2) and magnetic dipole (M1) transition probabilities are reported for transitions between levels of 3d^5 in [Fe IV]. The accuracy of the ab initio energy levels and the agreement in the length and velocity forms of the line strength for the E2 transitions are used as indicators of accuracy. The present E2 and M1 transition probabilities are compared with earlier Breit-Pauli results and other theories. An extensive set of transition probabilites with indicators of accuracy are reported in Appendices A and B. Recommended values of A(E2) + A(M1) are listed in Appendix C.
description: 16 pages, three appendices containing accuracy indicators and recommended values for E2 and M1 transition rates
Entanglement of multi-qubit states representing directed networks and its detection with quantum computing
Creators: name: Gnatenko, Kh. P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider quantum graph states that can be mapped to directed weighted graphs, also known as directed networks. The geometric measure of entanglement of the states is calculated for the quantum graph states corresponding to arbitrary graphs. We find relationships between the entanglement and the properties of the corresponding graphs. Namely, we obtain that the geometric measure of entanglement of a qubit with other qubits in the graph state is related to the weights of ingoing and outgoing arcs with respect to the vertex representing the qubit, outdegree and indegree of the corresponding vertex in the graph. For unweighted and undirected graphs, the entanglement depends on the degree of the corresponding vertex. Quantum protocol for quantifying of the entanglement of the quantum graph states is constructed. As an example, a quantum graph state corresponding to a chain is examined, and the entanglement of the state is calculated on AerSimulator.
Supplementary data
Creators: name: In, Kim Hye
Publisher: name: Zenodo
Year: 2021

description: Supplementary Figure legends Supplementary Table 1. Clinical characteristics of the three TW-TSH groups Supplementary Table 2. Multivariate cox proportional hazards models for PTMC progression according to age (<50 years versus ≥50 years) Supplementary Table 3. Multivariate cox proportional hazards models for PTMC progression according to age (<40, 40-49, 50-59 and ≥60 years) Supplementary Figure 1. Flow chart of enrollment in the current study. Supplementary Figure 2. Cutoff points of TW-TSH level for conventional progression in patients aged <50 years using maximally selected log-rank statistics. The red dashed lines are the TW-TSH levels maximizing the log-rank statistics as indicators of the cutoff point.
Visualization Drivers for Geant4
Creators: name: Beretvas, Andy
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This document is on Geant4 visualization tools (drivers), evaluating pros and cons of each option, including recommendations on which tools to support at Fermilab for different applications{\cite{Daniel}}. Four visualization drivers are evaluated. They are OpenGL, HepRep, DAWN and VRML. They all have good features, OpenGL provides graphic output with out an intermediate file! HepRep provides menus to assist the user. DAWN provides high quality plots and even for large files produces output quickly. VRML uses the smallest disk space for intermediate files. Large experiments at Fermilab will want to write their own display. They should proceed to make this display graphics independent. Medium experiment will probably want to use HepRep because of it's menu support. Smaller scale experiments will want to use OpenGL in the spirit of having immediate response, good quality output and keeping things simple.
description: Figures are now distributed througout the paper
Neue Technologien und Erziehung/Bildung
Creators: name: Meder, Norbert
Publisher: name: Medienimpulse
Year: 2015

description: Es wird gezeigt, dass Computertechnologie zur pädagogischen Aufgabe wird, weil es sich um eine Kulturtechnik handelt. Ausgehend vom Begriff der Bildung als Ausbildung eines Verhältnisses zu mir selbst, zu anderen und zur Welt wird Computertechnologie als Problemlösungsautomat, Sprachentwicklungsmaschine, Simulationsmaschine, Kommunikationsmaschine, Bildschirmgestaltungsmaschine, Schlüsselloch und Superzeichenmaschine analysiert. Die Analyse zeigt, daß Computertechnologie ein neues Bildungsideal erforderlich macht: Den Sprachspieler. Der Sprachspieler kennt sein doppelt reflexives Verhältnis zu sich selbst, zu anderen und zur Welt und beherrscht so das Spiel mit der Sprache zur Ausübung von Macht und Gewalt in der Informationsgesellschaft. Der Text geht in folgenden Schritten vor: Zunächst werden mit den Begriffen "Kulturtechnik" und "Bildung" die Prinzipien der Analyse bestimmt. Anschließend wird eine Sachanalyse der Computertechnologie durchgeführt und die gefundenen Eigenschaften jeweils in Relation zum Kulturtechnik- und Bildungsbegriff gesetzt.
description: Medienimpulse, Bd. 53 Nr. 1 (2015): 1/2015 - Medienpädagogik und E-Learning
One-dimensional Dunkl Quantum Mechanics: A Path Integral Approach
Creators: name: Benchikha, A.
name: Hamil, B.
name: Lütfüoğlu, B. C.
name: Khantoul, B.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the present manuscript, we employ the Feynman path integral method to derive the propagator in one-dimensional Wigner-Dunkl quantum mechanics. To verify our findings we calculate the propagator associated with the free particle and the harmonic oscillator in the presence of the Dunkl derivative. We also deduce the energy spectra and the corresponding bound-state wave functions from the spectral decomposition of the propagator.
description: 11 pages
Isotropic single gap superconductivity of elemental Pb: the `smiling' approach
Creators: name: Khasanov, Rustem
name: Das, Debarchan
name: Gawryluk, Dariusz Jakub
name: Gupta, Ritu
name: Mielke, Charles
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The unconventional multi-gap superconductivity in elemental Pb were reported previously by surface sensitive tunneling experiments, as well as predicted by several theory works. To obtain bulk evidence for such multiple gap behavior, the thermodynamic critical field $B_{\rm c}$ was measured along three different crystallographic directions ([100], [110], and [111]) in a high-quality Pb single crystal by means of muon spin rotation/relaxation. No difference in temperature evolution of $B_{\rm c}$ for all three directions was detected. The average reduced gap $α=Δ/k_{\rm B}T_{\rm c}=2.312(3)$ ($Δ$ is the zero-temperature gap value and $T_{\rm c}$ is the transition temperature) was further obtained by employing the phenomenological $α-$model. Our results imply that the elemental Pb is an isotropic superconductor with a single energy gap.
description: 6 pages, 3 figures. The version without `smiling' description to appear in Physical Review B as a Letter
Hadronization in tau -> K K pi nu_tau decays
Creators: name: Roig, Pablo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Hadronization in tau -> K K pi nu_tau decays is driven by both vector and axial-vector currents that we study, guided by the following principles: The 1/N_C expansion -worked out at leading order, considering only the contribution of the lightest spin one resonances-, approximate chiral symmetry at low energies and the appropriate asymptotic behaviour we demand to the associated form factors. All these features are implemented in the resonance theory. Most of its couplings are determined by imposing the short-distance requirements of vector and axial-vector spectral functions within QCD. We plan to improve our prediction of the hadronic spectra using recently available experimental data.
description: 5 pages, 1 figure. To appear in the proceedings of 43rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 8-15 Mar 2008
Nationalität und Herkunft in der Kriminalberichterstattung
Creators: name: Albrich, Sebastian
Publisher: name: Medienimpulse
Year: 2016

description: Die auf einer Online-Befragung von 64 KriminalberichterstatterInnen der tagesaktuellen österreichischen Print- und Online-Medien basierende Erhebung, bietet einen Einblick in die Ansichten und Einstellungen der befragten JournalistInnen zum Umgang mit der Nationalität und Ethnie in der Kriminalberichterstattung von Printmedien und ihren Onlinauftritten. So wurden Einflüsse auf die Handhabung, die Bedeutung der Information, die Akzeptanz verschiedener Regelungen zum Umgang mit der Information sowie das Problembewusstsein der Befragten erhoben. Die KriminalberichterstatterInnen messen Staatsbürgerschaft und Herkunft, vor allem im Kontext organisierter und grenzübergreifender Kriminalität sowie bei Straftaten, die ihrer Meinung nach verstärkt einer Nationalität zuordenbar sind, große Relevanz zu. Als Einflussfaktoren ließen unter anderem die persönlichen Einstellungen der JournalistInnen zum Zusammenhang von Staatsbürgerschaft, Herkunft und Kriminalität sowie das Publikumsbild identifizieren. Die Entscheidung über den Umgang mit den Informationen soll für die JournalistInnen primär medienintern fallen. Ein Nichtnennen wird von den Befragten aus verschiedenen Gründen allgemein abgelehnt. Der Migrationshintergrund sollte eher nicht kenntlich gemacht werden. Obwohl über die Hälfte der Meinung ist, dass die Kriminalberichterstattung Vorurteile schüre, glauben sie nicht, dass der Verzicht auf die Nennung etwas an den Vorurteilen in der Bevölkerung ändern würde.
description: Medienimpulse, Bd. 54 Nr. 1 (2016): 1/2016 - Printmedien in Österreich
Some biochemical and ultrastructural changes in intact and sarcoplasmic reduced, bovine Longissimus dorsi muscle strips inoculated with Pseudomonas fragi
Creators: name: Yada, Rickey Yoshio
Publisher: name: University of British Columbia
Year: 2010

description: Intact bovine Longissimus dovsi muscle was subjected to a mild washing procedure in order to reduce the concentration of the sarcoplasmic fluid. Intact and washed muscle samples were inoculated with Pseudomonas fragi to evaluate the effect of a sarcoplasmic reduction on bacterial growth and subsequent spoilage during storage at 4°C for 12 days. Aseptic controls were stored under similar conditions. Alterations in the water-soluble, salt-soluble, urea-soluble and urea-insoluble protein fractions, as well as the total carbohydrate, pH and bacterial numbers, were monitored in both intact and washed inoculated muscle samples. Scanning and transmission electron microscopy were employed to monitor ultrastructural changes on the muscle surface as a consequence of the growth of P. fragi. Analysis of water-soluble components (non-protein nitrogen, water-soluble proteins and carbohydrates) indicated that the washing procedure effectively removed the majority of these components. Increases in the extractability of the water-soluble and salt-soluble protein fractions were observed in the intact inoculated muscle sample. Alterations in the SDS-gel electrophoretic pattern of the water-soluble, salt-soluble, urea-soluble and urea-insoluble proteins were evident. Total carbohydrate decreased as a result of growth of P. fragi. An increase in pH of the intact muscle occurred as bacterial numbers increased. Significantly (P < 0.01) higher growth rates were observed on the intact muscle tissue than the washed muscle tissue. Relatively little change in the non-protein nitrogen, water-soluble and salt-soluble protein content was observed in the washed inoculated muscle tissue. A slight decrease in total carbohydrate was seen. Minor changes in the SDS-gel electrophoretograms of the salt-soluble proteins were apparent. Little change in pH of the washed inoculated sample occurred due to the growth of P. fragi. Scanning electron micrographs indicated that surface degradation of both intact and washed inoculated muscle samples were apparent only in areas of localized colonization. Glycocalyx appeared to mediate not only cell to cell attachment, but also cell to muscle surface adhesion. Bacteria were observed growing between muscle fibers. Transmission electron micrographs of intact inoculated muscle tissue confirmed the mediation of glycocalyx in bacterial adhesion. Cellular evaginations were present on the surface of the bacteria. Autolysis was minimal in both intact and washed aseptic muscle controls.
Augmented Reality als Bildungsenhancement?
Creators: name: Damberger, Thomas
Publisher: name: Medienimpulse
Year: 2017

description: Die Welt wird durch die augmented reality scheinbar umfangreicher. Nun meint Bildung im Sinne von Menschenbildung ein Sich-hinein-bilden in und ein Sich-erfahren an der Welt. Der vorliegende Beitrag geht der Frage nach, inwiefern ein durch die augmented reality eröffnetes Mehr an Welt zugleich ein Mehr an Bildung bedeuten kann. Kann im Zusammenhang mit der augmented reality gar von einem Bildungsenhancement gesprochen werden?
description: Medienimpulse, Bd. 54 Nr. 1 (2016): 1/2016 - Printmedien in Österreich
Nitrogen Abundance Distribution in the inner Milky Way
Creators: name: Pineda, Jorge L.
name: Horiuchi, Shinji
name: Anderson, L. D.
name: Luisi, Matteo
name: Langer, William D.
name: Goldsmith, Paul F.
name: Kuiper, Thomas B. H.
name: Fischer, Christian
name: Gong, Yan
name: Brunthaler, Andreas
name: Rugel, Michael
name: Menten, Karl M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We combine a new Galactic plane survey of Hydrogen Radio Recombination Lines (RRLs) with far-infrared (FIR) surveys of ionized Nitrogen, N+, to determine Nitrogen abundance across Galactic radius. RRLs were observed with NASA DSS-43 70m antenna and the Green Bank Telescope in 108 lines-of-sight spanning -135 degrees < l < 60 degrees, at b=0 degrees. These positions were also observed in [N II] 122 um and 205 um lines with the Herschel Space Observatory. Combining RRL and [N II] 122 um and 205 um observations in 41 of 108 samples with high signal-to-noise ratio, we studied ionized Nitrogen abundance distribution across Galactocentric distances of 0-8 kpc. Combined with existing Solar neighborhood and Outer galaxy N/H abundance determinations, we studied this quantity's distribution within the Milky Way's inner 17 kpc for the first time. We found a Nitrogen abundance gradient extending from Galactocentric radii of 4-17 kpc in the Galactic plane, while within 0-4 kpc, the N/H distribution remained flat. The gradient observed at large Galactocentric distances supports inside-out galaxy growth with the additional steepening resulting from variable star formation efficiency and/or radial flows in the Galactic disk, while the inner 4 kpc flattening, coinciding with the Galactic bar's onset, may be linked to radial flows induced by the bar potential. Using SOFIA/FIFI-LS and Herschel/PACS, we observed the [N III] 57 um line to trace doubly ionized gas contribution in a sub-sample of sightlines. We found negligible N++ contributions along these sightlines, suggesting mostly singly ionized Nitrogen originating from low ionization H II region outskirts.
description: Accepted for publication at the Astrophysical Journal. 25 pages, 13 figures
Medienbildung: ein Weg zur digitalen Arbeitswelt
Creators: name: Büsch, Andreas
Publisher: name: Medienimpulse
Year: 2016

description: Digitalisierung ist unbestritten DER Megatrend, gerade weil der digitale Wandel alle Lebensbereiche durchdringt und ebenso evolutionäre wie revolutionäre oder gar disruptive Veränderungsprozesse mit sich bringt. Das gilt auch für die Arbeitswelt, die unter dem Schlagwort Industrie 4.0 ihre vierte Revolution durchläuft. Aber wie steht es eigentlich um die Qualifikation der Menschen, die künftig in dieser neuen Arbeitswelt ihren Platz finden und diese gestalten sollen? Welche Anforderungen stellt die Wirtschaft an Medienbildung in Zeiten der Digitalisierung?
description: Medienimpulse, Bd. 54 Nr. 1 (2016): 1/2016 - Printmedien in Österreich
Die Initiative "Medienbildung JETZT!"
Creators: name: Kaindel, Christoph
Publisher: name: Medienimpulse
Year: 2017

description: Die Initiative "Medienbildung JETZT!" wurde 2011 als community of practice ins Leben gerufen, um die Vernetzung all jener zu fördern, die im Bereich der Medienbildung tätig sind, und ihre Anliegen zu vertreten. Der vorliegende Artikel beschreibt die Aktivitäten der Initiative in den ersten sechs Jahren ihres Bestehens. Die Grundsatzerklärung (angelehnt an das deutsche Manifest "Keine Bildung ohne Medien") bildete die Basis der Arbeit, es folgten mehrere Positionspapiere zu aktuellen Themen, regelmäßige Vernetzungstreffen, ein jährliches Barcamp, eine erfolgreiche Aktionswoche und die Befragung der Bildungssprecher*innen der Parlamentsparteien. Auf dem Barcamp im April 2017 soll nun die Gründung eines Verbandes besprochen und beschlossen werden.
description: Medienimpulse, Bd. 55 Nr. 1 (2017): 1/2017 - Tätigkeitsfelder schulischer MedienpädagogInnen
Rezension: Mein Kino des 20. Jahrhunderts. Erlebte Filmgeschichte
Creators: name: Rogy, Raffaela
Publisher: name: Medienimpulse
Year: 2017

description: Ein Maschinenbau-Ingenieur, der viel lieber Gedichte schrieb und schließlich Filmkritiker wurde blickt auf eine bewegte Filmhistorie zurück: Horst Dieter Sihler. In „Mein Kino des 20. Jahrhunderts. Erlebte Filmgeschichte“ gewährt der Kärntner Kulturtausendsassa Sihler Einblicke in die österreichische Filmlandschaft genauso wie auf das globale Filmschaffen etwa in Slowenien, Polen, dem ehemaligen Jugoslawien oder Lateinamerika sowie auf die technischen Entwicklungen des Mediums Film, die Horst Dieter Sihler über einen Zeitraum von über 70 Jahren miterlebt und durch zahlreiche Essays, Kritiken und Festivalorganisationen mitgestaltet hat.
description: Medienimpulse, Bd. 55 Nr. 1 (2017): 1/2017 - Tätigkeitsfelder schulischer MedienpädagogInnen
Predictions of Ultra-High Energy Cosmic Ray Propagation in the Context of Homogeneously Modified Special Relativity
Creators: name: Torri, Marco Danilo Claudio
name: Caccianiga, Lorenzo
name: di Matteo, Armando
name: Maino, Andrea
name: Miramonti, Lino
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Ultra high energy cosmic rays (UHECRs) may interact with photon backgrounds and thus the universe is opaque to their propagation. Many Lorentz Invariance Violation (LIV) theories predict a dilation of the expected horizon from which UHECRs can arrive to Earth, in some case even making the interaction probability negligible. In this work, we investigate this effect in the context of the LIV theory that goes by the name of Homogeneously Modified Special Relativity (HMSR). In this work, making use of a specifically modified version of the Sim- Prop simulation program in order to account for the modifications introduced by the theory to the propagation of particles, the radius of the proton opacity horizon (GZK sphere), and the attenuation length for the photopion production process are simulated and the modifications of these quantities introduced by the theory are studied.
Scanning strategies for imaging arrays
Creators: name: Kovacs, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Large-format (sub)millimeter wavelength imaging arrays are best operated in scanning observing modes rather than traditional position-switched (chopped) modes. The choice of observing mode is critical for isolating source signals from various types of noise interference, especially for ground-based instrumentation operating under a bright atmosphere. Ideal observing strategies can combat 1/f noise, resist instrumental defects, sensitively recover emission on large scales, and provide an even field coverage -- all under feasible requirements of telescope movement. This work aims to guide the design of observing patterns that maximize scientific returns. It also compares some of the popular choices of observing modes for (sub)millimeter imaging, such as random, Lissajous, billiard, spiral, On-The-Fly (OTF), DREAM, chopped and stare patterns. Many of the conclusions are also applicable other imaging applications and imaging in one dimension (e.g. spectroscopic observations).
description: 14 pages, 10 figures, published in Proc. SPIE 7020
Splitting of a Cooper pair by a pair of Majorana bound states
Creators: name: Nilsson, Johan
name: Akhmerov, A. R.
name: Beenakker, C. W. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Majorana bound states are spatially localized superpositions of electron and hole excitations in the middle of a superconducting energy gap. A single qubit can be encoded nonlocally in a pair of spatially separated Majorana bound states. Such Majorana qubits are in demand as building blocks of a topological quantum computer, but direct experimental tests of the nonlocality remain elusive. Here we propose a method to probe the nonlocality by means of crossed Andreev reflection, which is the injection of an electron into one bound state followed by the emission of a hole by the other bound state (equivalent to the splitting of a Cooper pair over the two states). We have found that, at sufficiently low excitation energies, this nonlocal scattering process dominates over local Andreev reflection involving a single bound state. As a consequence, the low-temperature and low-frequency fluctuations $δI_{i}$ of currents into the two bound states $i=1,2$ are maximally correlated: $\overline{δI_{1}δI_{2}}=\overline{δI_{i}^{2}}$.
description: 4 pages, 2 figures; added two paragraphs and references in response to referee comments
Hall effect in laser ablated Co_2(Mn,Fe)Si thin films
Creators: name: Schneider, H.
name: Vilanova, E.
name: Balke, B.
name: Felser, C.
name: Jakob, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Pulsed laser deposition was employed to grow thin films of the Heusler compounds Co_2MnSi and Co_2FeSi. Epitaxial growth was realized both directly on MgO (100) and on a Cr or Fe buffer layer. Structural analysis by x-ray and electron diffraction shows for both materials the ordered L2_1 structure. Bulk magnetization was determined with a SQUID magnetometer. The values agree with the Slater-Pauling rule for half-metallic Heusler compounds. On the films grown directly on the substrate measurements of the Hall effect have been performed. The normal Hall effect is nearly temperature independent and points towards a compensated Fermi surface. The anomalous contribution is found to be dominated by skew scattering. A remarkable sign change of both normal and anomalous Hall coefficients is observed on changing the valence electron count from 29 (Mn) to 30 (Fe).
description: 9 pages, 6 figures submitted to J Phys D
Nonlinear Alfvén-wave Dynamics and Premerger Emission from Crustal Oscillations in Neutron Star Mergers
Creators: name: Most, Elias R.
name: Kim, Yoonsoo
name: Chatziioannou, Katerina
name: Legred, Isaac
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Neutron stars have solid crusts threaded by strong magnetic fields. Perturbations in the crust can excite non-radial oscillations, which can in turn launch Alfven waves into the magnetosphere. In the case of a compact binary close to merger involving at least one neutron star, this can happen through tidal interactions causing resonant excitations that shatter the neutron star crust. We present the first numerical study that elucidates the dynamics of Alfven waves launched in a compact binary magnetosphere. We seed a magnetic field perturbation on the neutron star crust, which we then evolve in fully general-relativistic force-free electrodynamics using a GPU-based implementation. We show that Alfven waves steepen nonlinearly before reaching the orbital light cylinder, form flares, and dissipate energy in a transient current sheet. Our results predict radio and X-ray precursor emission from this process.
description: 16 pages, 6 figures, version accepted by ApJL, changed title to match published version
TIC441725813: A new bright hybrid sdB pulsator with differential core/envelope rotation
Creators: name: Su, Wenchao
name: Charpinet, Stéphane
name: Latour, Marilyn
name: Zong, Weikai
name: Green, Elizabeth M
name: Li, Gang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the detailed analysis of a new hybrid (p- and g-mode) sdB pulsator, TIC441725813 (TYC 4427-1021-1), discovered and monitored by TESS over 670 days. The TESS light curves available for this star were analysed using prewhitening techniques to extract mode frequencies accurately. The pulsation spectrum is then interpreted through methods that include asymptotic period spacing relationships and rotational multiplets identification. We also exploited a high signal-to-noise ratio (S/N), low-resolution spectrum of TIC441725813 using grids of non-local thermodynamic equilibrium (NLTE) model atmospheres to derive its atmospheric parameters. Interestingly, several frequency multiplets interpreted as rotational splittings of deep-probing g-modes indicate a slow rotation period of at least $85.3 \pm 3.6$ day, while splittings of mostly envelope-probing p-modes suggest a significantly shorter rotation period of $17.9 \pm 0.7$ day, which implies the core (mainly the helium mantle with possibly the deeper partially-mixed helium-burning core that it surrounds) rotates at least ~4.7 times slower than the envelope. The radial velocity curves indicate that TIC441725813 is in a close binary system with a low-luminosity companion, possibly a white dwarf. While elusive in the available TESS photometry, a low-frequency signal that would correspond to a period of $\sim 6.7$ h is found, albeit at low S/N. TIC441725813 is a particularly interesting sdB star whose envelope rotates faster than the core. We hypothesise that this might be caused by the effects of tidal interaction with a companion, although in the present case, the presence of such a companion will have to be further investigated. This analysis paves the way toward a more detailed seismic probing of TIC441725813 using optimisation techniques, which will be presented in a second paper.
description: 14 pages, 14 figures
Medienarbeit in der Freizeitpädagogik – Von der Theorie zur Umsetzung
Creators: name: Sevcik, Christian
Publisher: name: Medienimpulse
Year: 2014

description: Medienarbeit in der Freizeitpädagogik. Christian Sevcik und Jakob Rudelstorfer berichten von einem Hochschullehrgang an der PH Wien und diskutieren erste medienpädagogische Überlegungen zum Sektor „Freizeit“. Dabei geht es sowohl um Theorie als auch um deren Umsetzung. Die Offensive des bm:ukk in der Schulischen Tagesbetreuung umfasst nicht nur quantitative sondern auch zahlreiche qualitative Ausbaumaßnahmen. So wurden im Herbst 2011 mit dem neu geschaffenen Berufsbild des akademischen Freizeitpädagogen/der akademischen Freizeitpädagogin erstmals österreichweit einheitliche Qualifikationsstandards für den Freizeitteil der schulischen Tagesbetreuung festgelegt.
description: Medienimpulse, Bd. 51 Nr. 2 (2013): 2/2013 - Freizeitpädagogik - Freiwillig, Selbstbestimmt, Selbstorganisiert?
Digitale Medien in der Grundschule
Creators: name: Eickelmann, Birgit
name: Vennemann, Mario
Publisher: name: Medienimpulse
Year: 2014

description: Mit der internationalen Grundschulleistungsstudie Trends in International Mathematics and Science Study (TIMSS 2011; vgl. Bos/Wendt/Köller/Selter 2012; Suchań/Wallner-Paschon/Bergmüller/Schreiner 2012) liegen aktuelle Daten zur schulischen und außerschulischen Nutzung digitaler Medien durch GrundschülerInnen sowie Lehrerdaten über den Einsatz von digitalen Medien in der Schule sowie im Fachunterricht in den Fächern Mathematik und Naturwissenschaften vor. Mit diesem Beitrag sollen die für die beteiligten Länder repräsentativen Daten genutzt werden, um Einblicke in die schulische und außerschulische Nutzung digitaler Medien durch Grundschulkinder am Ende der vierten Klasse zu geben. Dabei werden die Länder Deutschland und Österreich fokussiert und verglichen. Die Befunde werden theoretisch im Gesamtkontext der Medienpädagogik und vor dem Hintergrund der Qualitätsentwicklung von Schulsystemen im internationalen Vergleich diskutiert.
description: Medienimpulse, Bd. 51 Nr. 2 (2013): 2/2013 - Freizeitpädagogik - Freiwillig, Selbstbestimmt, Selbstorganisiert?
Inherent thermometry in a hybrid superconducting tunnel junction
Creators: name: Courtois, Hervé
name: Rajauria, Sukumar
name: Gandit, Philippe
name: Hekking, Frank
name: Pannetier, Bernard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We discuss inherent thermometry in a Superconductor - Normal metal - Superconductor tunnel junction. In this configuration, the energy selectivity of single-particle tunneling can provide a significant electron cooling, depending on the bias voltage. The usual approach for measuring the electron temperature consists in using an additional pair of superconducting tunnel junctions as probes. In this paper, we discuss our experiment performed on a different design with no such thermometer. The quasi-equilibrium in the central metallic island is discussed in terms of a kinetic equation including injection and relaxation terms. We determine the electron temperature by comparing the micro-cooler experimental current-voltage characteristic with isothermal theoretical predictions. The limits of validity of this approach, due to the junctions asymmetry, the Andreev reflection or the presence of sub-gap states are discussed.
Ectoedemia (Ectoedemia) heringi
Creators: name: van Nieukerken, Erik
name: Laštůvka, Aleš
name: Laštůvka, Zdeněk
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nepticulidae
Ectoedemia
Ectoedemia heringi

description: Ectoedemia (Ectoedemia) heringi (Toll) Biology. Hostplants: Quercus pubescens Willd., Q. robur L., Q. petraea (Matt.) Liebl., Q. faginea Lam., Q. ithaburensis Decne subsp. macrolepis (Kotschy) (new record), Cas- tanea sativa Miller. Leafmines are inseparable from those of E. albifasciella and contorta. Larvae found from September to November; adults fly from May to July. Distribution. Netherlands: Van Nieukerken et al. 1993; Belgium: De Prins 1998; Van Nieukerken 2006; Portugal: Van Nieukerken et al. 2004a; Greece: Laštůvka and Laštůvka 1998. Here recorded new for Crete. Material. Greece: 2 larvae [DNA identification] and vacated mines, Arkadia, Leonidhion, 5 km NE, coastal road, 10.XI.2009, leafmines on Quercus ithaburensis subsp. macrolepis, E.J. van Nieukerken (RMNH. INS17766–7); 1 young larva, Lakonia, Mystras, ancient town, 400, 470, 11.XI.2008, Q. pubescens, E.J. van Nieukerken (RMNH). Greece, Crete: 1♀, Rethymnon, Agia Galini, 20 m, 20.V.1994, R. Sutter (RS).
description: Published as part of van Nieukerken, Erik, Laštůvka, Aleš & Laštůvka, Zdeněk, 2010, Western Palaearctic Ectoedemia (Zimmermannia) Hering and Ectoedemia Busck s. str. (Lepidoptera: Nepticulidae): five new species and new data on distribution, hostplants and recognition, pp. 1-82 in ZooKeys 32 (32) on pages 62-63, DOI: 10.3897/zookeys.32.282, http://zenodo.org/record/576594
description: {"references": ["Nieukerken EJ van, Gielis C, Huisman KJ, Koster JC, Kuchlein JH, Wolf HW van der, Wolschrijn JB (1993) Nieuwe en interessante Microlepidoptera uit Nederland (Lepidoptera). Nederlandse Faunistische Mededelingen 5: 47 - 62. http: // www. repository. naturalis. nl / record / 303569.", "De Prins W (1998) Catalogue of the Lepidoptera of Belgium. Studiedocumenten van het KBIN 92: 1 - 236.", "Nieukerken EJ van, Lastuvka A, Lastuvka Z (2004 a) Annotated catalogue of the Nepticulidae and Opostegidae (Lepidoptera: Nepticuloidea) of the Iberian Peninsula. SHILAP Revista de Lepidopterologia 32: 211 - 260. http: // redalyc. uaemex. mx / src / inicio / ArtPdfRed. jsp? iCve = 45512710 & iCveNum = 9283.", "Lastuvka Z, Lastuvka A (1998) Beitrag zur Kenntnis der Nepticulidenfauna Griechenlands (Lepidoptera, Nepticulidae). Stapfia 55: 313 - 326."]}
GD 552: a cataclysmic variable with a brown dwarf companion?
Creators: name: Unda-Sanzana, E.
name: Marsh, T. R.
name: Gansicke, B. T.
name: Maxted, P. F. L.
name: Morales-Rueda, L.
name: Dhillon, V. S.
name: Thoroughgood, T. D.
name: Tremou, E.
name: Watson, C. A.
name: Hinojosa-Goni, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: GD 552 is a high proper motion star with the strong, double-peaked emission lines characteristic of the dwarf nova class of cataclysmic variable star, and yet no outburst has been detected during the past 12 years of monitoring. We present spectroscopy taken with the aim of detecting emission from the mass donor in this system. We fail to do so at a level which allows us to rule out the presence of a near-main-sequence star donor. Given GD 552's orbital period of 103 minutes, this suggests that it is either a system that has evolved through the ~80-minute orbital period minimum of cataclysmic variable stars and now has a brown dwarf mass donor, or that has formed with a brown dwarf donor in the first place. This model explains the low observed orbital velocity of the white dwarf and GD 552's low luminosity. It is also consistent with the absence of outbursts from the system.
Crystallographic groups and flat manifolds from surface braid groups
Creators: name: Gonçalves, Daciberg Lima
name: Guaschi, John
name: Ocampo, Oscar
name: Pereiro, Carolina de Miranda E
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Let $M$ be a compact surface without boundary, and $n\geq 2$. We analyse the quotient group $B_n(M)/Γ_2(P_n(M))$ of the surface braid group $B_{n}(M)$ by the commutator subgroup $Γ_2(P_n(M))$ of the pure braid group $P_{n}(M)$. If $M$ is different from the $2$-sphere $\mathbb{S}^2$, we prove that $B_n(M)/Γ_2(P_n(M))$ is isomorphic rho $P_n(M)/Γ_2(P_n(M)) \rtimes_φ S_n$, and that $B_n(M)/Γ_2(P_n(M))$ is a crystallographic group if and only if $M$ is orientable. If $M$ is orientable, we prove a number of results regarding the structure of $B_n(M)/Γ_2(P_n(M))$. We characterise the finite-order elements of this group, and we determine the conjugacy classes of these elements. We also show that there is a single conjugacy class of finite subgroups of $B_n(M)/Γ_2(P_n(M))$ isomorphic either to $S_n$ or to certain Frobenius groups. We prove that crystallographic groups whose image by the projection $B_n(M)/Γ_2(P_n(M))\to S_n$ is a Frobenius group are not Bieberbach groups. Finally, we construct a family of Bieberbach subgroups $\tilde{G}_{n,g}$ of $B_n(M)/Γ_2(P_n(M))$ of dimension $2ng$ and whose holonomy group is the finite cyclic group of order $n$, and if $\mathcal{X}_{n,g}$ is a flat manifold whose fundamental group is $\tilde{G}_{n,g}$, we prove that it is an orientable Kähler manifold that admits Anosov diffeomorphisms.
Nambu-Jona-Lasinio description of hadronic matter from a Bayesian approach
Creators: name: Marquez, K. D.
name: Malik, Tuhin
name: Pais, Helena
name: Menezes, Débora P.
name: Providência, Constança
Publisher: name: arXiv
Year: 2024
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A microscopic nuclear matter formalism with explicit chiral symmetry based on the Nambu Jona-Lasinio model is considered to describe nuclear matter. To reproduce nuclear matter properties adequately at the saturation density, four-point and eight-point interactions are introduced. Within a Bayesian inference approach, the parameters of the model are determined by imposing nuclear matter, both experimental and from {\it ab-initio} calculations, and neutron star observational constraints. Nuclear matter properties are well reproduced with an effective mass of 0.75 to 0.8 nucleon mass at the saturation density. At 90% confidence level, the radius of a $1.4 ~\rm M_\odot$ star varies between 11.48 km and 13.20 km, masses as large as $\sim 2.2 ~\rm M_\odot$ are predicted and the radius of a 2 M$_\odot$ star is above 10.5 km. High-density perturbative QCD (pQCD) results exclude equations of state that predict larger maximum masses and radii. The speed of sound increases monotonically with density and reaches values as large as $\sqrt{0.7}c$-$\sqrt{0.8}c$ in the center of massive stars. Several properties such as the polytropic index or the renormalized trace anomaly, that have been proposed to identify the deconfined phase transition, are analyzed. Interestingly, the radius of the obtained posterior that also meets pQCD constraints aligns closely with the mass-radius measurement of the recent PSR J0437-4715, which contrasts with other relativistic mean field model results.
description: 15 pages, 7 figures
I gruppi in rete: una teoria olista, documentale e realista
Creators: name: MARTINO, VALERIA
Publisher: name: Universit� degli studi di Genova
Year: 2021

description: The thesis explores the notion of ?social group? in the social ontology field. It starts from two core subjects that cannot be avoided dealing with groups, i.e. the holism-individualism debate and the collective intentionality approach. Highlighting the importance of getting some holistic elements and the non necessity of the collective intentionality in order to understand the birth of social groups, it develops a theory based on a realistic conception of groups able to comprehend a large number of their different kinds. Exploring the available theories on groups, the thesis goes on trying to distinguish their sociological realizations and applies the traditional categories to a new kind of groups, i.e. online groups distinguished by the presence of non-natural intelligence. In this way it can explore to what extent they can be defined ?social? and lay the foundations for more work to be done on the relation between responsibility and sociability.
Generalized Keller-Segel models of chemotaxis. Analogy with nonlinear mean field Fokker-Planck equations
Creators: name: Chavanis, Pierre-Henri
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We consider a generalized class of Keller-Segel models describing the chemotaxis of biological populations (bacteria, amoebae, endothelial cells, social insects,...). We show the analogy with nonlinear mean field Fokker-Planck equations and generalized thermodynamics. As an illustration, we introduce a new model of chemotaxis incorporating both effects of anomalous diffusion and exclusion principle (volume filling). We also discuss the analogy between biological populations described by the Keller-Segel model and self-gravitating Brownian particles described by the Smoluchowski-Poisson system.
description: Proceedings of the conference "Chaos, Complexity and Transport" (Marseille, 5-9 June 2007)
Künstlerisch geleitete Medienbildung mit Portfolios: Potenziale für Jugendliche in berufsvorbereitenden Bildungsmaßnahmen
Creators: name: Reimann, Daniela
name: Bekk, Simone
Publisher: name: Medienimpulse
Year: 2014

description: Die pädagogische Zielgruppe des BMBF-Forschungsprojekts "MediaArt@Edu" (Leitung: Dr. Daniela Reimann, Wiss. Mitarbeiterin: Simone Bekk) sind TeilnehmerInnen außerschulischer berufsvorbereitender Bildungsmaßnahmen, die im Rahmen von künstlerischen Workshops Medienprojekte am ZKM realisieren, die Gestaltungsprozesse mittels Projektportfolio visualisieren und – betreut von studentischen Mentoren – reflektieren. Die Jugendlichen sollen gestalterisch und spielerisch an Medientechnologien herangeführt werden, um eigene berufsübergreifende Potenziale entdecken zu können. Das KIT kooperiert dabei mit dem Zentrum für Kunst und Medientechnologie und der Arbeitsagentur Karlsruhe. Es werden Workshops zu unterschiedlichen thematischen Medienmodulen durchgeführt und evaluiert, wie z. B. Roboter_Gestalten, Licht_Gestalten, GamesLab, Sound und Smart Textile (Wearables). Ziel des Vorhabens ist es, ein neues Konzept digitaler Medienbildung mit Lernprozessbegleitung durch Studierende zu entwickeln, welches künstlerische Vermittlungsformen, interaktive Medien und Kunst einbezieht und das den Voraussetzungen, Bedürfnissen und Entwicklungsperspektiven von Jugendlichen in der Berufsvorbereitung und -orientierung besser als bislang entspricht und zur ihrer individuellen Berufsbiografiegestaltung beiträgt. Im vorliegenden Artikel wird der mediendidaktische Ansatz und das kunstpädagogische Konzept des Projekts anhand des Beispielmoduls "Licht-Objekte gestalten" vorgestellt und anhand von Beispielen aus der Projektarbeit veranschaulicht.
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
Das Leben, der Tod und die staubige Wiedergeburt
Creators: name: Kacunko, Slavko
Publisher: name: Medienimpulse
Year: 2014

description: In ihrer 'Bakterienkunst' greift Sabine Kacunko unter anderem auf die Patina und den Biofilm als Zeugnisse von Oberflächenveränderungen zurück, welche sie mithilfe von naturwissenschaftlichen und medialen Techniken auch für die Kunst erschließbar macht. Der folgende Beitrag macht sich zur Aufgabe, die interdisziplinäre und medienpädagogischen Potenziale des entsprechenden, bislang ungenügend kontextualisierten, Forschungsfeldes vorzustellen. Am deutlichsten vermittelbar war das Interesse an Bakterien bislang vor allem durch die bezügliche forschungsbasierte Kunst gewesen. Diese soll hier an einer künstlerischen Position verdeutlicht werden, welche die Breite des genannten Forschungsfeldes bewusst zum eigenen, fortlaufenden Programm gemacht hat. Die derzeit global verbreiteten akademischen Programme zur kunst-basierten Forschung (Art-based Research; Practice-based Research etc.) untersuchen bekanntlich die Querverbindungen zwischen Forschung durch Kunst, Forschung über die Kunst und Forschung, welche die Kunst benützt. Definiert wird diese disziplinübergreifende kunst-basierte Forschung einerseits durch den systematischen Gebrauch von künstlerischen Prozessen als Quellen zum Verstehen und Vermittlung von Erfahrungen von Forschern, Institutionen und Publikum. Sie liefert andererseits Einsichten in die übergreifenden epistemischen Wendungen (twists), welche wiederum eine hohe Relevanz für die künftige Bildung und professionelle Praxis darstellen
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
Non-Overlapping Placement of Macro Cells based on Reinforcement Learning in Chip Design
Creators: name: Yu, Tao
name: Gao, Peng
name: Wang, Fei
name: Yuan, Ru-Yue
Publisher: name: arXiv
Year: 2024
Subjects: subject: Hardware Architecture (cs.AR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Due to the increasing complexity of chip design, existing placement methods still have many shortcomings in dealing with macro cells coverage and optimization efficiency. Aiming at the problems of layout overlap, inferior performance, and low optimization efficiency in existing chip design methods, this paper proposes an end-to-end placement method, SRLPlacer, based on reinforcement learning. First, the placement problem is transformed into a Markov decision process by establishing the coupling relationship graph model between macro cells to learn the strategy for optimizing layouts. Secondly, the whole placement process is optimized after integrating the standard cell layout. By assessing on the public benchmark ISPD2005, the proposed SRLPlacer can effectively solve the overlap problem between macro cells while considering routing congestion and shortening the total wire length to ensure routability. Codes are available at https://github.com/zhouyusd/SRLPlacer.