cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: The role of individual differences in social anxiety on threat extinction and avoidance
Creators: name: Wake, Shannon
Publisher: name: University of Reading
Year: 2021

description: Social anxiety disorder is a prevalent and debilitating disorder that significantly impairs quality of life. Although Cognitive Behavioural Therapy, that incorporates exposure as a primary component, is the first-line treatment for social anxiety disorder, relapse after treatment is common. Principles of threat extinction serve as a laboratory-based model for exposure therapy. Despite this, relatively few studies have investigated the effect of social anxiety on extinction learning processes. Therefore, the primary aim of this work was to examine the relationship between individual differences in social anxiety and learning processes within Pavlovian threat extinction paradigms. Paper 1 used two separate socially relevant threat extinction experiments to assess the relationship between social anxiety and threat extinction and retention. In Paper 2, a systematic review of the literature that has investigated the association between social anxiety and threat conditioning and extinction was conducted. The findings from Paper 1 and Paper 2 did not provide evidence that social anxiety is related to compromised extinction learning or retention. Instead, this work suggests that other maladaptive processes related to social anxiety may account for the maintenance or return of fear after exposure therapy. Thus, Paper 3 examined the effect of individual differences in social anxiety on low-cost avoidance conditioning and extinction and found that social anxiety was associated with increased avoidance behaviour to threat and safety cues after extinction learning. Taken together, the findings suggest that maladaptive extinction of avoidance behaviour, and not extinction learning, is implicated in the maintenance or return of social anxiety related symptoms after exposure therapy. The work of this thesis points towards several suggestions for future clinical research to inform potential targets for exposure-based treatments for social anxiety disorder.
Giant Magnon and Spike Solutions with Two Spins in AdS4xCP3
Creators: name: Ryang, Shijong
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the string theory in AdS_4 \times CP^3 we construct the giant magnon and spike solutions with two spins in two kinds of subspaces of R_t \times CP^3 and derive the dispersion relations for them. For the single giant magnon solution in one subspace we show that its dispersion relation is associated with that of the big one-spin giant magnon solution in the RP^2 subspace. For the single giant magnon solution in the other complementary subspace its dispersion relation is similar to that of the one-spin giant magnon solution living in the S^2 subspace but has one additional spin dependence.
description: 13pages, LaTeX, no figures
Digitale Medien als Mediatoren von Agency
Creators: name: Friedrichs-Liesenkötter, Henrike
name: Schmitt, Caroline
Publisher: name: Medienimpulse
Year: 2018

description: Der Beitrag fragt nach der Bedeutung digitaler Medien für junge Geflüchtete in Deutschland und für Fachkräfte in der (medien-)pädagogischen Arbeit mit jungen Geflüchteten. Er stützt sich auf Material aus zwei Forschungsprojekten und analysiert die ambivalente Funktion von Medien als Mediatoren von Agency. Digitale Medien wirken einerseits unterstützend in den Lebenswelten von Geflüchteten: Sie sind Fluchthelfer, erleichtern den Alltag in einem neuen Umfeld, fungieren als Bindeglied zu bürgerschaftlich Engagierten und stärken in medienpädagogischen Projekten die Artikulations- und Partizipationsmöglichkeiten sowie die Medienkompetenz der jungen Menschen. Gleichzeitig transportieren sie belastende Ereignisse unmittelbar nach Deutschland, schüren Sorgen und können als Trigger fungieren. Ihre Nutzung ist in hohem Maße abhängig von der bestehenden technischen und politischen Infrastruktur und damit keineswegs selbstverständlich. Pädagogische Fachkräfte gilt es, für die ambivalente Bedeutung von digitalen Medien in den Lebenswelten von Geflüchteten zu sensibilisieren und sie zu einer Reflexion der ambivalenten Effekte hinsichtlich der Handlungsfähigkeit der jungen Menschen anzuregen.
description: Medienimpulse, Bd. 55 Nr. 3 (2017): 3/2017 - Medien und Flucht – Medienpädagogische Perspektiven
On the effective surface energy in viscoelastic Hertzian contacts
Creators: name: Afferrante, Luciano
name: Violano, Guido
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Viscoelasticity and rate-dependent adhesion of soft matter lead to difficulties in modeling the 'relatively simple' problem of a rigid sphere in contact with a viscoelastic half-space. For this reason, approximations in describing surface interactions and viscous dissipation processes are usually adopted in the literature. Here, we develop a fully deterministic model in which adhesive interactions are described by Lennard-Jones potential and the material behaviour with the standard linear solid model. Normal loading-unloading cycles are carried out under different driving conditions. When loading is performed in quasi-static conditions and, hence, unloading starts from a completely relaxed state of the material, the effective surface energy is found to monotonically increase with the contact line velocity up to an asymptotic value reached at high unloading rates. Such result agrees with existing theories on viscoelastic crack propagation. If loading and unloading are performed at the same non-zero driving velocity and, hence, unloading starts from an unrelaxed state of the material, the trend of the effective surface energy Δγeff with the contact line velocity is described by a bell-shaped function in a double-logarithmic plot. The peak of Δγeff is found at a contact line velocity smaller than that makes maximum the tangent loss of the viscoelastic modulus. Furthermore, we show Gent\&Schultz assumption partly works in this case as viscous dissipation is no longer localized along the contact perimeter but it also occurs in the bulk material.
Measurements and confluence in quantum lambda calculi with explicit qubits
Creators: name: Díaz-Caro, Alejandro
name: Arrighi, Pablo
name: Gadella, Manuel
name: Grattage, Jonathan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper demonstrates how to add a measurement operator to quantum lambda-calculi. A proof of the consistency of the semantics is given through a proof of confluence presented in a sufficiently general way to allow this technique to be used for other languages. The method described here may be applied to probabilistic rewrite systems in general, and to add measurement to more complex languages such as QML or Lineal, which is the subject of further research.
description: 15 pages. Minor changes: final proceedings version. To appear ENTCS: Proceedings of QPL V - DCV IV, Reykjavik, Iceland, 2008
Discovery of Extreme Carbon Stars in the Large Magellanic Cloud
Creators: name: Gruendl, R. A.
name: Chu, Y. -H.
name: Seale, J. P.
name: Matsuura, M.
name: Speck, A. K.
name: Sloan, G. C.
name: Looney, L. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using Spitzer IRAC and MIPS observations of the Large Magellanic Cloud, we have identified 13 objects that have extremely red mid-IR colors. Follow-up Spitzer IRS observations of seven of these sources reveal varying amounts of SiC and C2H2 absorption as well as the presence of a broad MgS feature in at least two cases, indicating that these are extreme carbon stars. Preliminary estimates find these objects have luminosities of 4-11x10^3 Lsol and preliminary model fitting gives mass-loss rates between 4x10^-5 and 2x10^-4 Msol/yr, higher than any known carbon-rich AGB star in the LMC. These spectral and physical properties require careful reconsideration of dust condensation and mass-loss processes for carbon stars in low metallicity environments.
description: Accepted for publication in ApJ Letters. 4 pages, 3 figures
The use of hyaluronic acid in individuals with cleft lip and palate: Literature review
Creators: name: Molena, Kelly Fernanda
name: Pinto, Lidiane de Castro
name: Dalben, Gisele da Silva
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Since the Resolution 198/2019 of Brazilian Dental Council, which regulates orofacial harmonization as a dental specialty, and the advent of various uses of facial fillers, such as hyaluronic acid (HA), it is possible to perform both esthetic and functional corrections in individuals. Individuals with cleft lip and palate (CLP) present lip irregularities even after orofacial rehabilitation with an interdisciplinary team with several corrective surgeries, interfering with the esthetics, which can cause problems in self-esteem and social insertion. Thus, facial filling is an innovation that, together with dentistry, contributes to the individual's esthetics and well-being. Considering the patient safety and health, more research is progressively being conducted to make such procedures less invasive. This work conducted a literature review on the use of HA as a facial filler to correct lip scars in patients with CLP. By a literature and transverse search in Scientific Electronic Library Online and PubMed databases using specific descriptors, the studies that met the inclusion criteria were selected, from 1990 to 2020. It can be concluded that the use of HA as a facial filling material in the correction of lip scars from reparative surgeries related to CLP has been shown to be effective both for correction of facial asymmetry and to improve the quality of life of patients who used the procedure.
Wahlprüfsteine: Wie sich die Parteien Medienbildung und Digitale Bildung vorstellen
Creators: name: Missomelius, Petra
Publisher: name: Medienimpulse
Year: 2017

description: Die bundesweite Initiative "Keine Bildung ohne Medien!" (KBoM!) verfasste auch in diesem Wahljahr 2017 Wahlprüfsteine zur Förderung von Medienkompetenz und Medienbildung und verschickte diese zur Stellungnahme an die zur Bundestagswahl antretenden Parteien. Die Antworten der Parteien bieten eine gute Orientierung bei der Wahlentscheidung zum Themenbereich Medien, Bildung und Digitalisierung.
description: Medienimpulse, Bd. 55 Nr. 3 (2017): 3/2017 - Medien und Flucht – Medienpädagogische Perspektiven
The Perfect Binary One-Error-Correcting Codes of Length 15: Part I--Classification
Creators: name: Östergård, Patric R. J.
name: Pottonen, Olli
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A complete classification of the perfect binary one-error-correcting codes of length 15 as well as their extensions of length 16 is presented. There are 5983 such inequivalent perfect codes and 2165 extended perfect codes. Efficient generation of these codes relies on the recent classification of Steiner quadruple systems of order 16. Utilizing a result of Blackmore, the optimal binary one-error-correcting codes of length 14 and the (15, 1024, 4) codes are also classified; there are 38408 and 5983 such codes, respectively.
description: 6 pages. v3: made the codes available in the source of this paper
Rezension: Von der Bildfläche. Eine Archäologie der Lineatur
Creators: name: Ballhausen, Thomas
Publisher: name: Medienimpulse
Year: 2017

description: Medienimpulse, Bd. 55 Nr. 3 (2017): 3/2017 - Medien und Flucht – Medienpädagogische Perspektiven
Die Medienbildung in der PädagogInnenbildung-neu.
Creators: name: Lasser, Bernhard
name: Treinen, Christian
Publisher: name: Medienimpulse
Year: 2016

description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
Partizipative medienpädagogische Aktionsforschung
Creators: name: Swertz, Christian
name: Mildner (Sontag), Katharina
Publisher: name: Medienimpulse
Year: 2016

description: Für die Medienpädagogik ist wie für jede Pädagogik das Theorie-Praxis-Problem relevant. Im Beitrag wird partizipative Aktionsforschung als Methode zur Gestaltung von Theorie-Praxis-Korrelationen untersucht. Dazu wird zunächst das Theorie-Praxis-Problem als Relation der Korrelationen zwischen Theorie und Praxis in Forschungs- und Unterrichtsmethoden bestimmt. Anschließend wird durch Interpretationen von Theorien zur partizipativen Aktionsforschung und von Daten aus einem Projekt untersucht, ob die Relation von Forschung und Unterricht so gestaltet werden kann, dass zu souveränen Akten in solidarisch-libertären Gemeinschaften aufgefordert wird. Die Ergebnisse zeigen, dass dies möglich und die Methode also medienpädagogisch relevant ist.
description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
Digitale Bildung – quo vadis?
Creators: name: Büsch, Andreas
Publisher: name: Medienimpulse
Year: 2016

description: Unter dem Titel "Durch Stärkung der Digitalen Bildung Medienkompetenz fördern und digitale Spaltung überwinden" hatte die große Koalition im März 2015 einen Entschließungsantrag eingebracht, der die Digitale Agenda insofern konkretisieren wollte. In einer Medienpädagogischen Trendtagung haben sich die Träger der Tagungsreihe Digital 2020 die Aufgabe gestellt, den aktuellen Sachstand zu erfragen, das Themenfeld Digitale Bildung zu beleuchten und Perspektiven und Probleme aufzuzeigen.
description: Medienimpulse, Bd. 53 Nr. 4 (2015): 4/2015 - Medienbildung im Kontext der "PädagogInnenbildung NEU"/Teil 2
The discontinuous nature of the exchange-correlation functional -- critical for strongly correlated systems
Creators: name: Mori-Sanchez, Paula
name: Cohen, Aron J.
name: Yang, Weitao
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Standard approximations for the exchange-correlation functional have been found to give big errors for the linearity condition of fractional charges, leading to delocalization error, and the constancy condition of fractional spins, leading to static correlation error. These two conditions are now unified for states with both fractional charge and fractional spin: the exact energy functional is a plane, linear along the fractional charge coordinate and constant along the fractional spin coordinate with a line of discontinuity at the integer. This sheds light on the nature of the derivative discontinuity and calls for explicitly discontinuous functionals of the density or orbitals that go beyond currently used smooth approximations. This is key for the application of DFT to strongly correlated systems.
description: 5 pages 2 figures
Swapping exchange and spin-orbit induced correlated phases in proximitized Bernal bilayer graphene
Creators: name: Zhumagulov, Yaroslav V.
name: Kochan, Denis
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: Exchange interaction Phase diagrams Proximity effect Spin-orbit coupling Spintronics 2-dimensional systems Bilayer graphene Strongly correlated systems Van der Waals systems Random phase approximation k dot p method
subject: 530 Physik

description: Ex-so-tic van der Waals heterostructures take advantage of electrically tunable layer polarization to swap proximity exchange and spin-orbit coupling in the electronically active region. Perhaps the simplest example is Bernal bilayer graphene (BBG) encapsulated by a layered magnet from one side and a strong spin-orbit material from the other. Taking WS2/BBG/Cr2⁢Ge2⁢Te6 as a representative ex-so-tronic device, we employ realistic ab initio inspired Hamiltonians and effective electron-electron interactions to investigate the emergence of correlated phases within the random phase approximation. We find that exchange and spin-orbit coupling induced Stoner and intervalley coherence instabilities can be swapped for a given doping level, allowing one to explore the full spectrum of correlated phases within a single device.
Systematics of Arnica, subgenus Austromontana and a new subgenus, Calarnica (Asteraceae : Senecioneae)
Creators: name: Straley, Gerald Bane
Publisher: name: University of British Columbia
Year: 2010

description: Seven species are recognized in Arnica subgenus Austromontana and two species in a new subgenus Calarnica based on a critical review and conservative revision of the species. Chromosome numbers are given for 91 populations representing all species, including the first reports for Arnica nevadensis. Results of apomixis, vegetative reproduction, breeding studies, and artificial hybridizations are given. Interrelationships of insect pollinators, leaf miners, achene feeders, and floret feeders are presented. Arnica cordifolia, the ancestral species consists largely of tetraploid populations, which are either autonomous or pseudogamous apomicts, and to a lesser degree diploid, triploid, pentaploid, and hexaploid populations. It has given rise to Arnica nevadensis which is tetraploid and autonomously apomictic, and to a complex of discoid populations treated here as a single polymorphic species, Arnica discoidea, with both diploid and tetraploid, sexual and pseudogamous apomictic races. Arnica spathulata, derived from Arnica discoidea, is largely restricted to serpentine soils and is a sexual diploid, with a few pseudogamous tetraploid apomictic populations. Arnica latifolia, the most polymorphic species, has arisen from Arnica cordifolia, although it has remained largely sexual and diploid. Arnica latifolia has given rise to Arnica cernua, the serpentine sexual, diploid endemic, and to Arnica gracilis, probably through hybridization with other species. Arnica gracilis now exists largely as a series of autonomously apomictic triploid races. The subgenus Calarnica was possibly derived from subgenus Austromontana by way of Arnica spathulata through Arnica venosa, the latter giving rise to Arnica viscosa. These latter two species are rare sexual diploids.
Das Recht der Toten
Creators: name: Braun, Johanna
Publisher: name: Medienimpulse
Year: 2017

description: Diese Publikation untersucht die gegenwärtige Darstellung des heimsuchenden Mädchens im Mainstream-US-Horrorfilm, wobei die Art und Weise, wie juristische Anliegen über diese Kulminationsfigur verhandelt werden, im Zentrum der Aufmerksamkeit steht. Denn gegenwärtig erfreut sich das gespenstische Mädchen als Recht und Gerechtigkeit einfordernde Figur einer unheimlichen Medienpräsenz im US-amerikanischen Kontext. In Folge fokussiert sich dieser Beitrag auf historische Präzedenzfälle im US-amerikanischen Justizsystem, die auffällig an der Entwicklung des un toten Mädchens als juristisch-motivierte Rächerin im Mainstream Horror Film mitgewirkt haben. Ziel der Untersuchung ist es, aufzuzeigen, dass und wie sich dieser gegenwärtige Filmtypus wesentlich in Relation zu einer Reihe von juristischen Entscheidungen entwickelt hat, in denen dem Recht- und Gerechtigkeitsanspruch von juristischen Personen vehement nachgegangen wird, auch über den Tod der Betroffenen hinaus.
description: Medienimpulse, Bd. 54 Nr. 4 (2016): 4/2016 - Macht, Souveränität, Herrschaft
Surface-induced heating of cold polar molecules
Creators: name: Buhmann, Stefan Yoshi
name: Tarbutt, M. R.
name: Scheel, Stefan
name: Hinds, E. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the rotational and vibrational heating of diatomic molecules placed near a surface at finite temperature on the basis of macroscopic quantum electrodynamics. The internal molecular evolution is governed by transition rates that depend on both temperature and position. Analytical and numerical methods are used to investigate the heating of several relevant molecules near various surfaces. We determine the critical distances at which the surface itself becomes the dominant source of heating and we investigate the transition between the long-range and short-range behaviour of the heating rates. A simple formula is presented that can be used to estimate the surface-induced heating rates of other molecules of interest. We also consider how the heating depends on the thickness and composition of the surface.
description: 17 pages, 7 figures
Weighted sum formula for multiple zeta values
Creators: name: Guo, Li
name: Xie, Bingyong
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 11M41, 11M99, 40B05

description: The sum formula is a basic identity of multiple zeta values that expresses a Riemann zeta value as a homogeneous sum of multiple zeta values of a given dimension. This formula was already known to Euler in the dimension two case, conjectured in the early 1990s for higher dimensions and then proved by Granville and Zagier independently. Recently a weighted form of Euler's formula was obtained by Ohno and Zudilin. We generalize it to a weighted sum formula for multiple zeta values of all dimensions.
description: 18 pages
A delay differential eqution NOLM-NALM mode-locked laser model
Creators: name: Vladimirov, Andrei G.
name: Suchkov, Sergey
name: Huyet, Guillaume
name: Turitsyn, Sergei K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences
subject: J.2
subject: 78A60, 78-10

description: Delay differential equation model of a NOLM-NALM mode-locked laser is developed that takes into account finite relaxation rate of the gain medium and asymmetric beam splitting at the entrance of the nonlinear mirror loop. Asymptotic linear stability analysis of the continuous wave solutions performed in the limit of large delay indicates that in a class-B laser flip instability leading to a period doubling cascade and development of square-wave patterns can be suppressed by a short wavelength modulational instability. Numerically it is shown that the model can demonstrate large windows of regular fundamental and harmonic mode-locked regimes with single and multiple pulses per cavity round trip time separated by domains of irregular pulsing.
description: 8 pages, 10 figures
title: Orizzonti di accessibilità. Azioni e processi per percorsi inclusivi. Accessibilità e cultura
Creators: name: Carlini, Alessandra
name: Farroni, Laura
name: Mancini,  Matteo Flavio
Publisher: name: RomaTrE-Press
Year: 2023

description: La strada condotta negli anni sul tema dell’accessibilità fino alle sollecitazioni del Design for all, le convenzioni internazionali (UN, UNESCO, ONU) e il quadro normativo più volte affinato nel contesto europeo o italiano, hanno spesso costruito l’illusione che questo bastasse a garantire la piena partecipazione di tutti. Il presente, invece, ancora ci interroga e si apre a nuove letture che intendono l’inclusività nella cornice più ampia della costruzione di un senso di appartenenza, del benessere dell’individuo e della collettività (Agenda 2030).  In questo contesto, i due volumi curati sul tema dell’accessibilità, di cui il presente è il primo, mettono a sistema risultati di ricerca, politiche gestionali, esperienze didattiche, buone pratiche, linguaggi secondo quattro temi trasversali:

    - L’accesso alla conoscenza attraverso politiche inclusive
    - La cultura del progetto nella trasformazione dello spazio fisico
    - L’uso di tecnologie per le fragilità e la definizione di linguaggi multimediali
    - Esperienze a confronto per la costruzione di Comunità di Pratiche (Étienne Wenger).

Il primo volume cura l’accessibilità nell’ambito del patrimonio culturale, tangibile e intangibile, mostrando riflessioni, progetti, applicazioni di normative da parte di studiosi di diverse discipline che attraverso il loro operare delineano sia il consolidamento di processi avviati, sia nuovi orizzonti inclusivi.
Rezension: The View from the Cheap Seats. Selected Nonfiction.
Creators: name: Wintersteiger, Christina
Publisher: name: Medienimpulse
Year: 2016

description: Neil Gaiman, Autor zahlreicher Fantasy-, Science-Fiction- und Kinderbücher sowie Comics (am bekanntesten wohl die DC-Reihe "The Sandman"), legt hier eine Auswahl nichtfiktionaler Texte vor. Die in dem abwechslungsreichen Band abgedruckten Reden, Vorworte, Vorträge und Essays sind die Hommage eines leidenschaftlichen Lesers und Künstlers an die Literatur, die Kindheit, das Träumen und an die Kunst des Geschichtenerzählens. – Christina Wintersteiger hat diesen sehr persönlichen Band nicht minder persönlich für die MEDIENIMPULSE rezensiert.
description: Medienimpulse, Bd. 54 Nr. 4 (2016): 4/2016 - Macht, Souveränität, Herrschaft
A magnetic Weyl semimetallic phase in thin films of Eu$_2$Ir$_2$O$_7$
Creators: name: Liu, Xiaoran
name: Fang, Shiang
name: Fu, Yixing
name: Ge, Wenbo
name: Kareev, Mikhail
name: Kim, Jong-Woo
name: Choi, Yongseong
name: Karapetrova, Evguenia
name: Zhang, Qinghua
name: Gu, Lin
name: Choi, Eun-Sang
name: Wen, Fangdi
name: Wilson, Justin H.
name: Fabbris, Gilberto
name: Ryan, Philip J.
name: Freeland, John
name: Haskel, Daniel
name: Wu, Weida
name: Pixley, Jedediah H.
name: Chakhalian, Jak
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The interplay between electronic interactions and strong spin-orbit coupling is expected to create a plethora of fascinating correlated topological states of quantum matter. Of particular interest are magnetic Weyl semimetals originally proposed in the pyrochlore iridates, which are only expected to reveal their topological nature in thin film form. To date, however, direct experimental demonstrations of these exotic phases remain elusive, due to the lack of usable single crystals and the insufficient quality of available films. Here, we report on the discovery of the long-sought magnetic Weyl semi-metallic phase in (111)-oriented Eu$_2$Ir$_2$O$_7$ high-quality epitaxial thin films. The topological magnetic state shows an intrinsic anomalous Hall effect with colossal coercivity but vanishing net magnetization, which emerges below the onset of a peculiar magnetic phase with all-in-all-out antiferromagnetic ordering. The observed anomalous Hall conductivity arises from the non-zero Berry curvature emanated by Weyl node pairs near the Fermi level that act as sources and sinks of Berry flux, activated by broken cubic crystal symmetry at the top and bottom terminations of the thin film.
Opportunities and Challenges of Multiwinding Transformer-Based DC-DC Converters-Slides
Creators: Marco Liserre
Publisher: name: IEEE
Year: 2021

PELS Webinar Slides
Abstract: Multiwinding-Transformer-based (MWT) DC-DC converter did emerge in the last 25 years as an interesting possibility to connect several energy systems and-or to offer higher power density because of the reduction of transformer core material and reduction of power converter stages.  MWT DC-DC converters can be considered as an interesting compromise between non-modular DC-DC Converter and a modular DC-DC converter since they are themselves modular in the construction. This eventually lead to some fault tolerant possibilities because the MWT connects more ports and if one of them is not working anymore and it can be isolated still the others can continue operating. Unfortunately, it is exactly the MWT which creates most of the technical challenges of this class of DC-DC converters because of the cross-coupling effects which make especially the resonant-topology very challenging to be designed. This webinar will review the history of the MWT DC-DC and then provide a classification of them, comparing them with Figure of Merits and focusing on which is the maximum possible number of windings and which are the most suited magnetic core types. The problems coming from cross-coupling and the possible fault tolerant operation are analyzed with the help of simulation and experimental results.
Creativity in cooperative face-to-face and online settings – What are the criteria that matter?
Creators: name: Motschnig, Renate
name: Schmoelz, Alexander
Publisher: name: Medienimpulse
Year: 2018

description: Medienimpulse, Bd. 55 Nr. 4 (2017): 4/2017 - Kreativität/Ko-Kreativität
Classical and relativistic orbital motions around a mass-varying body
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: I calculate the classical effects induced by an isotropic mass loss of a body on the orbital motion of a test particle around it; the present analysis is also valid for a variation of the Newtonian constant of gravitation. I perturbatively obtain negative secular rates for the osculating semimajor axis, the eccentricity and the mean anomaly, while the argument of pericenter does not undergo secular precession; the node and the inclination i remain unchanged. The anomalistic period is different from the Keplerian one, being larger than it. The true orbit, instead, expands, as shown by a numerical integration of the equations of motion in Cartesian coordinates; in fact, this is in agreement with the seemingly counter-intuitive decreasing of the semimajor axis and the eccentricity because they refer to the osculating Keplerian ellipses which approximate the trajectory at each instant. A comparison with the results obtained with different approaches by other researchers is made. General relativity induces positive secular rates of the semimajor axis and the eccentricity completely negligible in the present and future evolution of the solar system.
description: LaTex, 27 pages, no tables, 7 figures, 31 references. To appear in Scholarly Research Exchange (SRX Physics)
Adiabatic hyperspherical study of triatomic helium systems
Creators: name: Suno, Hiroya
name: Esry, B. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The 4He3 system is studied using the adiabatic hyperspherical representation. We adopt the current state-of-the-art helium interaction potential including retardation and the nonadditive three-body term, to calculate all low-energy properties of the triatomic 4He system. The bound state energies of the 4He trimer are computed as well as the 4He+4He2 elastic scattering cross sections, the three-body recombination and collision induced dissociation rates at finite temperatures. We also treat the system that consists of two 4He and one 3He atoms, and compute the spectrum of the isotopic trimer 4He2 3He, the 3He+4He2 elastic scattering cross sections, the rates for three-body recombination and the collision induced dissociation rate at finite temperatures. The effects of retardation and the nonadditive three-body term are investigated. Retardation is found to be significant in some cases, while the three-body term plays only a minor role for these systems.
description: 24 pages 6 figures Submitted to Physical Review A
Zooming in on eV-MeV Scale Sterile Neutrinos in light of Neutrinoless Double Beta Decay
Creators: name: Jha, Tapoja
name: Khan, Sarif
name: Mitra, Manimala
name: Patra, Ayon
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The existence of light sterile neutrinos, as predicted in several models, can help to explain a number of observations starting from dark mater to recent anomalies in short baseline experiments. In this paper we consider two models - Left-Right Symmetric Zee model and Extended Seesaw model, that can naturally accommodate the presence of light sterile neutrinos in the eV to MeV mass scale. We perform a detailed study on the neutrinoless double beta decay process which receives major contributions from diagrams involving these light sterile neutrinos. Considering a number of theoretical and experimental constraints, including light neutrino masses and mixings, unitarity of the mixing matrix etc., we compare our predicted values of the half-life of neutrinoless double beta decay with the experimental limits. This can put significant constraints on the neutrino mass, active-sterile neutrino mixing and several other important parameters in these models.
description: 33 pages, 16 figures. Comments are welcome
Aspects of Diffeomorphism and Conformal invariance in classical Liouville theory
Creators: name: Banerjee, Rabin
name: Gangopadhyay, Sunandan
name: Kulkarni, Shailesh
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The interplay between the diffeomorphism and conformal symmetries (a feature common in quantum field theories) is shown to be exhibited for the case of black holes in two dimensional classical Liouville theory. We show that although the theory is conformally invariant in the near horizon limit, there is a breaking of the diffeomorphism symmetry at the classical level. On the other hand, in the region away from the horizon, the conformal symmetry of the theory gets broken with the diffeomorphism symmetry remaining intact.
description: Accepted in Euro. Phys. Letters., Title changed, abstract modified, major modifications made in the paper
Programmable Interactions and Emergent Geometry in an Atomic Array
Creators: name: Periwal, Avikar
name: Cooper, Eric S.
name: Kunkel, Philipp
name: Wienand, Julian F.
name: Davis, Emily J.
name: Schleier-Smith, Monika
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Interactions govern the flow of information and the formation of correlations in quantum systems, dictating the phases of matter found in nature and the forms of entanglement generated in the laboratory. Typical interactions decay with distance and thus produce a network of connectivity governed by geometry, e.g., by the crystalline structure of a material or the trapping sites of atoms in a quantum simulator. However, many envisioned applications in quantum simulation and computation require richer coupling graphs including nonlocal interactions, which notably feature in mappings of hard optimization problems onto frustrated spin systems and in models of information scrambling in black holes. Here, we report on the realization of programmable nonlocal interactions in an array of atomic ensembles within an optical cavity, where photons carry information between distant atomic spins. By programming the distance-dependence of interactions, we access effective geometries where the dimensionality, topology, and metric are entirely distinct from the physical arrangement of atoms. As examples, we engineer an antiferromagnetic triangular ladder, a Moebius strip with sign-changing interactions, and a treelike geometry inspired by concepts of quantum gravity. The tree graph constitutes a toy model of holographic duality, where the quantum system may be viewed as lying on the boundary of a higher-dimensional geometry that emerges from measured spin correlations. Our work opens broader prospects for simulating frustrated magnets and topological phases, investigating quantum optimization algorithms, and engineering new entangled resource states for sensing and computation.
Extended Limber Approximation
Creators: name: LoVerde, Marilena
name: Afshordi, Niayesh
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We develop a systematic derivation for the Limber approximation to the angular cross-power spectrum of two random fields, as a series expansion in 1/(\ell+1/2). This extended Limber approximation can be used to test the accuracy of the Limber approximation and to improve the rate of convergence at large \ell's. We show that the error in ordinary Limber approximation is O(1/\ell^2). We also provide a simple expression for the second order correction to the Limber formula, which improves the accuracy to O(1/\ell^4). This correction can be especially useful for narrow redshift bins, or samples with small redshift overlap, for which the zeroth order Limber formula has a large error. We also point out that using \ell instead of (\ell+1/2), as is often done in the literature, spoils the accuracy of the approximation to O(1/\ell).
description: 7 pages, 6 figures
Advances in multiscale modeling for novel and emerging technologies
Creators: name: Verkhovtsev, Alexey V.
name: Solov'yov, Ilia A.
name: Solov'yov, Andrey V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Accelerator Physics (physics.acc-ph)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Computational multiscale modeling encompasses a wide range of end-products and a great number of technological applications. This paper provides an overview of the computational multiscale modeling approach based on the utilization of MBN Explorer and MBN Studio software packages, the universal and powerful tools for computational modeling in different areas of challenging research arising in connection with the development of novel and emerging technologies. Three illustrative case studies of multiscale modeling are reviewed in relation to (i) the development of novel sources of monochromatic high-energy radiation based on the crystalline undulators, (ii) controlled fabrication of nanostructures using the focused electron-beam induced deposition, and (iii) ion-beam cancer therapy. These examples illustrate the key algorithms and unique methodologies implemented in the software.
description: 18 pages, 16 figures. Review paper to be published in Eur. Phys. J. D
"Minesweeper" and spectrum of discrete Laplacians
Creators: name: German, Oleg
name: Lakshtanov, Evgeny
Publisher: name: arXiv
Year: 2008
Subjects: subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: The paper is devoted to a problem inspired by the "Minesweeper" computer game. It is shown that certain configurations of open cells guarantee the existence and the uniqueness of solution. Mathematically the problem is reduced to some spectral properties of discrete differential operators. It is shown how the uniqueness can be used to create a new game which preserves the spirit of "Minesweeper" but does not require a computer.
description: We add consideration of tables based on the triangle tiling of the plane. Its paper version encounters situations typical for the computer "Minesweeper" game
Evaluation of Mid-Palatal Suture Maturation Stage in Adolescents and Adults Using Cone Beam Computed Tomography (CBCT)- A Comparative Study
Creators: name: Singh, Ravinder
name: Gupta, Deepak
name: Garg, Aashna
name: Dahiya, Veenu
name: Gambhir, Ramandeep
name: Gupta, Paras
Publisher: name: Nigerian Medical Journal
Year: 2025

description: Background: Several methods have been described in orthodontics for the evaluation of the skeletal age. These include hand-wrist radiography and cervical vertebral maturation (CVM) based on lateral cephalogram. Computed tomography (CT) scan has emerged as an effective tool for image diagnosis in situ. The present study was done to assess the stages of the mid-palatal suture in adolescents and adults utilizing cone beam computed tomography (CBCT).

 

Methodology: A descriptive and prospective study was done on 110 CBCT scans of individuals aged between 10-30 years, who visited the Department of Oral Medicine and Radiology, MMCDSR, Ambala, Haryana. The visualization and classification of the stage of maturation of the mid-palatine suture was done as per Angelieri’s method using a cross-sectional axial slice.

 

Results: Stage C was found to be the most prevalent (29.1%) with the majority of cases occurring in the 16–20 age range. Males were more likely to have Stage B, while females had Stage C. In 60 cases (54.5 percent of the overall sample), the mid-palatine suture was found to be open. The Chi-Square test results for each examiner were highly significant (p< 0.01), indicating a statistically significant association between age group and Stage distribution.

 

Conclusion: There is a higher chance that post-adolescents and adults will have an open mid-palatal suture. When maxillary expansion is necessary, orthodontists may take these consequences into account. Furthermore, the middle palatal suture's ossification varies, hence using CBCT to rule out this possibility may be advised.
description: Nigerian Medical Journal, Vol. 66 No. 1 (2025): January - February
Mutual Information and Boson Radius in c=1 Critical Systems in One Dimension
Creators: name: Furukawa, Shunsuke
name: Pasquier, Vincent
name: Shiraishi, Jun'ichi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the generic scaling properties of the mutual information between two disjoint intervals, in a class of one-dimensional quantum critical systems described by the c=1 bosonic field theory. A numerical analysis of a spin-chain model reveals that the mutual information is scale-invariant and depends directly on the boson radius. We interpret the results in terms of correlation functions of branch-point twist fields. The present study provides a new way to determine the boson radius, and furthermore demonstrates the power of the mutual information to extract more refined information of conformal field theory than the central charge.
description: 4.1 pages, 5 figures
Computer- und informationsbezogene Kompetenzen in der IEA Studie ICILS 2013 und der Zusammenhang mit der Lesekompetenz
Creators: name: Eickelmann, Birgit
name: Drossel, Kerstin
Publisher: name: Medienimpulse
Year: 2017

description: Der kompetente Umgang mit Informations- und Kommunikationstechnologien (ICT) gewinnt im Zuge des Wandels zur Informations- und Wissensgesellschaft zunehmend an Bedeutung. Die International Computer and Information Literacy Study (ICILS 2013) erfasst in diesem Zusammenhang erstmals computer- und informationsbezogene Kompetenzen computerbasiert im internationalen Vergleich. Theoretische Überlegungen und empirische Befunde postulieren dabei einen Zusammenhang der erfassten Kompetenzdomäne mit der Lesekompetenz der Schülerinnen und Schüler. Eine empirische Untersuchung dieses Zusammenhangs steht bislang allerdings noch aus und ist das Anliegen dieses Beitrags. Um diesem Desiderat nachzugehen, werden die repräsentativen Schülerdaten aus ICILS 2013 für Deutschland herangezogen. Dabei wird die Untersuchung des Zusammenhangs der beiden Konstrukte möglich, da in Deutschland national ein Lesetest ergänzt wurde, den die Achtklässlerinnen und Achtklässler zusätzlich bearbeitet haben. Die Pfadanalyse zeigt, dass Lesen einen mittleren direkten Effekt von .452 auf die computer- und informationsbezogenen Kompetenzen aufweist.
description: Medienimpulse, Bd. 55 Nr. 4 (2017): 4/2017 - Kreativität/Ko-Kreativität
Decimetric type U solar radio bursts and associated EUV phenomena on 2011 February 9
Creators: name: Gao, Guannan
name: Cai, Qiangwei
name: Guo, Shaojie
name: Wang, Min
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A GOES M1.9 flare took place in active region AR 11153 on February 9,2011. With the resolution of 200 kHz and a time cadence of 80 ms, the reverse-drifting (RS) type III bursts, intermittent sequence of type U bursts, drifting pulsation structure (DPS), and fine structures were observed by the Yunnan Observatories Solar Radio Spectrometer(YNSRS). Combined information revealed by the multi-wavelength data indicated that after the DPS which observed by YNSRS, the generation rate of type U bursts suddenly increased 5 times than before. In this event, the generation rate of type U bursts may depend on the magnetic reconnection rate. Our observations are consistent with previous numerical simulations results. After the first plasmoid produced (plasma instability occurred), the magnetic reconnection rate increased suddenly 5-8 times than before. Furthermore, after the DPS, the frequency range of turnover frequency of type U bursts is obviously broadened 3 times than before, which indicates the fluctuation amplitude of the density in the loop-top. Our observations also support the numerical simulations during the flare impulsive phase. The turbulence occurs at the top of the flare loop, the plasmoids can trap the non-thermal particles and cause the density fluctuation at the loop-top. The observations are generally consistent with the results of numerical simulations, helping us to better understand the characteristics of the whole physical process of eruption.
description: 14 pages,10 figures, accepted by ApJ
Universal entangler with photon pairs in arbitrary states
Creators: name: He, Bing
name: Ren, Yuhang
name: Bergou, Janos A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a setup that transforms a photon pair in arbitrary rank-four mixed state, which could also be unknown, to a Bell state. The setup involves two linear optical circuits processing the individual photons and a parity gate working with weak cross-Kerr nonlinearity. By the photon number resolving detection on one of the output quantum bus or communication beams, the setup will realize a near deterministic transformation to a Bell state for every entangling attempt. With the simple threshold detectors, on the other hand, the system can still reach a considerable success probability of 0.5 per try. The decoherence effect caused by photon absorption losses in the operation is also discussed.
description: 7 pages, 4 figures