cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Response of a particle in a one-dimensional lattice to an applied force: Dynamics of the effective mass
Creators: name: Duque-Gomez, Federico
name: Sipe, J. E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the behaviour of the expectation value of the acceleration of a particle in a one-dimensional periodic potential when an external homogeneous force is suddenly applied. The theory is formulated in terms of modified Bloch states that include the interband mixing induced by the force. This approach allows us to understand the behaviour of the wavepacket, which responds with a mass that is initially the bare mass, and subsequently oscillates around the value predicted by the effective mass. If Zener tunneling can be neglected, the expression obtained for the acceleration of the particle is valid over timescales of the order of a Bloch oscillation, which are of interest for experiments with cold atoms in optical lattices. We discuss how these oscillations can be tuned in an optical lattice for experimental detection.
description: 15 pages, 12 figures
PEGASUS VVM - From Foundations to Future Work
Creators: name: Eberle, Ulrich
Publisher: name: Zenodo
Year: 2023

description: On the occasion of the  PEGASUS VVM Event on November 21 and 22, 2023 in Stuttgart at Carl Benz Arena, VVM project final results in presentations, exhibitions, demonstrations were presented and international panel discussions took place. This occasion marked the culmination of the PEGASUS VVM project, setting the course for the future of safety verification in automated vehicles. The event featured an array of high-level presentations and an exhibition, offering a unique opportunity for extensive discussions with experts in the thematic area of safety validation methodologies. 
On the first day the VVM project results were presented in detail on stage and in an exhibition area. The focus of the second day was on discussions with international VVM liaison partners from all around the world.
The presention at hand served as introduction to the event.
A Depth-Optimal Canonical Form for Single-qubit Quantum Circuits
Creators: name: Bocharov, Alex
name: Svore, Krysta M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Given an arbitrary single-qubit operation, an important task is to efficiently decompose this operation into an (exact or approximate) sequence of fault-tolerant quantum operations. We derive a depth-optimal canonical form for single-qubit quantum circuits, and the corresponding rules for exactly reducing an arbitrary single-qubit circuit to this canonical form. We focus on the single-qubit universal H,T basis due to its role in fault-tolerant quantum computing, and show how our formalism might be extended to other universal bases. We then extend our canonical representation to the family of Solovay-Kitaev decomposition algorithms, in order to find an ε-approximation to the single-qubit circuit in polylogarithmic time. For a given single-qubit operation, we find significantly lower-depth ε-approximation circuits than previous state-of-the-art implementations. In addition, the implementation of our algorithm requires significantly fewer resources, in terms of computation memory, than previous approaches.
description: 10 pages, 3 figures
Superluminal waves in pulsar winds
Creators: name: Arka, Ioanna
name: Kirk, John G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The energy lost by a rotation-powered pulsar is carried by a relativistic flow containing a mixture of electromagnetic fields and particles. In the inner regions, this is thought to be a magnetically dominated, cold, electron-positron wind that is well described by the MHD equations. However, beyond a critical radius r_{cr}, the same particle, energy and momentum fluxes can be transported by a strong, transverse electromagnetic wave with superluminal phase speed. We analyze the nonlinear dispersion relation of these waves for linear and circular polarization, and find the dependence of r_{cr} on the mass-loading, magnetization and luminosity of the flow, as well as on the net magnetic flux. We show that, for most isolated pulsars, the wind lies well outside r_{cr}, and speculate that superluminal modes play an important role in the dissipation of electromagnetic energy into nonthermal particles at the termination shock.
description: Submitted to ApJ
Effective carrying capacity and analytical solution of a particular case of the Richards-like two-species population dynamics model
Creators: name: Cabella, Brenno Caetano Troca
name: Ribeiro, Fabiano
name: Martinez, Alexandre Souto
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We consider a generalized two-species population dynamic model and analytically solve it for the amensalism and commensalism ecological interactions. These two-species models can be simplified to a one-species model with a time dependent extrinsic growth factor. With a one-species model with an effective carrying capacity one is able to retrieve the steady state solutions of the previous one-species model. The equivalence obtained between the effective carrying capacity and the extrinsic growth factor is complete only for a particular case, the Gompertz model. Here we unveil important aspects of sigmoid growth curves, which are relevant to growth processes and population dynamics.
description: To appear in Physica A (6 pages, 5 figures)
Pedagogy of the League of Nations in the Weimar Republic. How I dealt with the League of Nations with 14-year-old girls from an elementary school (8th grade) in Berlin
Creators: name: Götz, Konrad
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: -

description: Kein Abstract vorhanden

No Abstract available
description: JSSE - Journal of Social Science Education, 2-2011: Praise of Difference: Dealing with Heterogeneity in Socio-Scientific Education
Near-infrared and Millimeter-wavelength Observations of Mol 160: A Massive Young Protostellar Core
Creators: name: Wolf-Chase, Grace
name: Smutko, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have discovered two compact sources of shocked H2 2.12-micron emission coincident with Mol 160 (IRAS 23385+6053), a massive star-forming core thought to be a precursor to an ultracompact HII region. The 2.12-micron sources lie within 2" (0.05 pc) of a millimeter-wavelength continuum peak where the column density is >= 10e24 cm$^{-2}$. We estimate that the ratio of molecular hydrogen luminosity to bolometric luminosity is > 0.2%, indicating a high ratio of mechanical to radiant luminosity. CS J=2-1 and HCO$^+$ J=1-0 observations with CARMA indicate that the protostellar molecular core has a peculiar velocity of ~ 2 km s$^{-1}$ with respect to its parent molecular cloud. We also observed 95 GHz CH3OH J=8$-7 Class I maser emission from several locations within the core. Comparison with previous observations of 44-GHz CH3OH maser emission shows the maser sources have a high mean ratio of 95-GHz to 44-GHz intensity. Our observations strengthen the case that Mol 160 (IRAS 23385+6053) is a rapidly accreting massive protostellar system in a very early phase of its evolution.
description: 47 pages, 8 figures, 2 tables, accepted for publication in ApJ, 7 Dec 2011
“Völkerbundspädagogik”. Internationale Politik als Unterrichtsthema in der Weimer Republik
Creators: name: Busch, Matthias
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: -

description: Kein Abstract vorhanden

No Abstract available
description: JSSE - Journal of Social Science Education, 2-2011: Praise of Difference: Dealing with Heterogeneity in Socio-Scientific Education
Pedagogy of the League of Nations. International politics as a lesson topic in the Weimar Republic
Creators: name: Busch, Matthias
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: -

description: Kein Abstract vorhanden

No Abstract available
description: JSSE - Journal of Social Science Education, 2-2011: Praise of Difference: Dealing with Heterogeneity in Socio-Scientific Education
Gesamtausgabe / Entire Issue
Creators: name: JSSE, Administrator
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: -

description: Kein Abstract vorhanden

No Abstract available
description: JSSE - Journal of Social Science Education, 2-2011: Praise of Difference: Dealing with Heterogeneity in Socio-Scientific Education
Observation of second-order hyper-Raman generation in LiNbO3 whispering-gallery mode disk resonators
Creators: name: Simons, Matt T.
name: Novikova, Irina
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this manuscript we report experimental demonstration of nonlinear frequency conversion at several optical frequencies in a whispering-gallery mode resonator (WGMR). Due to the enhancement of nonlinear interactions inside a WGMR, interaction of a 1064 nm pump field with a LiNbO3 disk produced a weak, but measurable non-phase matched 532 nm second harmonic field at room temperature (>100C below the phase-matching temperature), for pump powers of a few tens of mW. For higher pump powers, we observed the generation of four additional fields at 545 nm, 559 nm, 573 nm, and 587 nm. The relative spectral shift between two consecutive fields corresponds to a 455 cm^-1 vibrational mode in LiNbO3 crystal. Our preliminary analysis indicates that these fields are the result of a multi-phonon hyper-Raman scattering, in which two photons of the pump field are converted into one photon of a higher-frequency field and one or several optical phonons.
description: 3 pages, 4 figures
Totally reflexive extensions and modules
Creators: name: Chen, Xiao-Wu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16G50, 13B02, 16E65

description: We introduce the notion of totally reflexive extension of rings. It unifies Gorenstein orders and Frobenius extensions. We prove that for a totally reflexive extension, a module over the extension ring is totally reflexive if and only if its underlying module over the base ring is totally reflexive.
Testing and Diagnosing Social Science Literacy
Creators: name: Weber, Birgit
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: -

description: A year ago the Journal of Social Science Education 4/2010 invites to debate the foundation of social science literacy. What are the competences, and ‘what are’ the contents, and individual needs to understand the relations, systems and orders of society, economy and politics? What helps to make autonomously found decisions and responsible judgements in individual and social life? What kind of abilities are needed for autonomous action within ones own life in order to participate within the given frames of society, economy and politics, in shaping them or in creating new rules. Search and discussion of the relevant concepts and competences in the domain of social science education are going on. Nevertheless the research on testing and diagnosing social science literacy is carried as well – despite the absence of a consensus on content.
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
Optical photometric and spectral study of the new FU Orionis object V2493 Cyg (HBC 722)
Creators: name: Semkov, E. H.
name: Peneva, S. P.
name: Munari, U.
name: Tsvetkov, M. K.
name: Jurdana-Sepic, R.
name: de Miguel, E.
name: Schwartz, R. D.
name: Dimitrov, D. P.
name: Kjurkchieva, D. P.
name: Radeva, V. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new results from optical photometric and spectroscopic observations of the eruptive pre-main sequence star V2493 Cyg (HBC 722). The object has continued to undergo significant brightness variations over the past few months and is an ideal target for follow-up observations. We carried out CCD BVRI photometric observations in the field of V2493 Cyg ("Gulf of Mexico") from August 1994 to April 2012, i.e. at the pre-outburst states and during the phases of the outburst. We acquired high, medium, and low resolution spectroscopy of V2493 Cyg during the outburst. To study the pre-outburst variability of the target and construct its historical light curve, we searched for archival observations in photographic plate collections. Both CCD and photographic observations were analyzed using 15 comparison stars in the field of V2493 Cyg. The pre-outburst photographic and CCD photometric observations of V2493 Cyg show low-amplitude light variations typical of T Tauri stars. The recent photometric data show a slow light decrease from October 2010 to June 2011 followed by an increase in brightness that continued until early 2012. The spectral observations of V2493 Cyg are typical of FU Orionis stars absorption spectra with strong P Cyg profiles of H alpha and Na I D lines. On the basis of photometric monitoring performed over the past two years, the spectral properties at the maximal light, as well as the shape of long-term light curves, we confirm that the observed outburst of V2493 Cyg is of FU Orionis type.
description: 7 pages, 6 figures, accepted for publication in A&A
A Sceptical Look at the Quantitative Education Research in Civic and Citizenship Education
Creators: name: Zurstrassen, Bettina
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Civic and citizenship education; test ethics; Gender

description: At the latest since the PISA study, the international comparability of educational system performance is called for. Little discussion takes place on the research problems occurring in the course of internationally comparative educational systems in the social societal teaching subjects. Research, however, finds itself confronted with methodical, scientific-theoretic and test-ethical problems. These problem areas are to be outlined in this paper. The focus will be on quantitatively comparative education studies. Essentially the analysis consists of an examination of the ICCS Study (International Civic and Citizenship Education Study) of the biggest internationally comparative political education study in existence.
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
Baryon chiral perturbation theory transferred to hole-doped antiferromagnets on the honeycomb lattice
Creators: name: Jiang, F. -J.
name: Kaempfer, F.
name: Bessire, B.
name: Wirz, M.
name: Hofmann, C. P.
name: Wiese, U. -J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A systematic low-energy effective field theory for hole-doped antiferromagnets on the honeycomb lattice is constructed. The formalism is then used to investigate spiral phases in the staggered magnetization as well as the formation of two-hole bound states.
description: Talk delivered by C.P. Hofmann at the XIII Mexican Workshop on Particles and Fields, October 19-26, 2011, Leon, Guanajuato, Mexico; 15 pages, 7 figures
Drawing a Map of Elections
Creators: name: Szufa, Stanisław
name: Boehmer, Niclas
name: Bredereck, Robert
name: Faliszewski, Piotr
name: Niedermeier, Rolf
name: Skowron, Piotr
name: Slinko, Arkadii
name: Talmon, Nimrod
Publisher: name: arXiv
Year: 2025
Subjects: subject: Multiagent Systems (cs.MA)
subject: Artificial Intelligence (cs.AI)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: Our main contribution is the introduction of the map of elections framework. A map of elections consists of three main elements: (1) a dataset of elections (i.e., collections of ordinal votes over given sets of candidates), (2) a way of measuring similarities between these elections, and (3) a representation of the elections in the 2D Euclidean space as points, so that the more similar two elections are, the closer are their points. In our maps, we mostly focus on datasets of synthetic elections, but we also show an example of a map over real-life ones. To measure similarities, we would have preferred to use, e.g., the isomorphic swap distance, but this is infeasible due to its high computational complexity. Hence, we propose polynomial-time computable positionwise distance and use it instead. Regarding the representations in 2D Euclidean space, we mostly use the Kamada-Kawai algorithm, but we also show two alternatives. We develop the necessary theoretical results to form our maps and argue experimentally that they are accurate and credible. Further, we show how coloring the elections in a map according to various criteria helps in analyzing results of a number of experiments. In particular, we show colorings according to the scores of winning candidates or committees, running times of ILP-based winner determination algorithms, and approximation ratios achieved by particular algorithms.
description: Journal article merging results from arxiv:2105.07815, arXiv:2407.11889 and Szufa et al., "Drawing a Map of Elections in the Space of Statistical Cultures", AAMAS '20
Reentrant superconductivity in superconductor/ferromagnetic-alloy bilayers
Creators: name: Zdravkov, V. I.
name: Kehrle, J.
name: Obermeier, G.
name: Gsell, S.
name: Schreck, M.
name: üller, C. M
name: von Nidda, H. A. Krug
name: Lindner, J.
name: Moosburger-Will, J.
name: Nold, E.
name: Morari, R.
name: Ryazanov, V. V.
name: Sidorenko, A. S.
name: Horn, S.
name: Tidecks, R.
name: Tagirov, L. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We studied the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like state establishing due to the proximity effect in superconducting Nb/Cu41Ni59 bilayers. Using a special wedge-type deposition technique, series of 20-35 samples could be fabricated by magnetron sputtering during one run. The layer thickness of only a few nanometers, the composition of the alloy, and the quality of interfaces were controlled by Rutherford backscattering spectrometry, high resolution transmission electron microscopy, and Auger spectroscopy. The magnetic properties of the ferromagnetic alloy layer were characterized with superconducting quantum interference device (SQUID) magnetometry. These studies yield precise information about the thickness, and demonstrate the homogeneity of the alloy composition and magnetic properties along the sample series. The dependencies of the critical temperature on the Nb and Cu41Ni59 layer thickness, Tc(dS) and Tc(dF), were investigated for constant thickness dF of the magnetic alloy layer and dS of the superconducting layer, respectively. All types of non-monotonic behaviors of Tc versus dF predicted by the theory could be realized experimentally: from reentrant superconducting behavior with a broad extinction region to a slight suppression of superconductivity with a shallow minimum. Even a double extinction of superconductivity was observed, giving evidence for the multiple reentrant behavior predicted by theory. All critical temperature curves were fitted with suitable sets of parameters. Then, Tc(dF) diagrams of a hypothetical F/S/F spin-switch core structure were calculated using these parameters. Finally, superconducting spin-switch fabrication issues are discussed in detail in view of the achieved results.
description: 34 pages, 9 figures
Significant Learning and Civic Education: Shifting Frameworks for Teaching in Light of Learning about the Financial Crisis
Creators: name: McGoldrick, KimMarie
name: Peterson, Janice
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Pedagogy; service-learning; experiential education; financial crisis; unemployment

description: The recent financial crisis has motivated economic educators to rethink what economics should be taught, acknowledging disconnects between classroom content and real world events. We introduce a learning theory approach that is broader, one that goes beyond such context specific discussions of foundational knowledge and application (i.e., teaching about this specific crisis) and provide a framework to address the broader issue of how teaching practices can, by their very nature, minimize such disconnects and provide more effective processes for teaching about current economic conditions. The theory of significant learning (Fink 2003) is presented as a model of how experiences can be used to develop a deep approach to learning, learning that lasts. Experiential learning pedagogies are timeless in that they can be readily modified to promote deeper understanding over a wide range of economic environments. Focusing on one category of significant learning, the human dimension, and one component of the financial crisis, unemployment, examples which modify existing experiential learning practices are described to demonstrate how such pedagogic practices can be readily adapted to teaching and learning about current economic conditions. In short, we demonstrate that incorporating student experiences into pedagogic practice provides a natural alignment of teaching content and real world events, regardless of how those change over time.
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
Framework of Measuring Economic Competencies
Creators: name: Macha, Klaas
name: Schuhen, Michael
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Economic competency; economic literacy; economic education

description: How to model economic competencies with the objective of empirically testing them? This question has been discussed for many years now without a conclusive measurement model having been presented thus far. Taking an in-depth analysis of the definition of competency proposed by Weinert (2001) as a starting point, we will derive a framework for the necessary complexity of competency assessment, which finds its graphical representation in a competence octagon. After discussing existing empirical work in the field of economic education and classifying it using the categories of the competence octagon, we will then propose a new model of economic competency that allows for empirical testing.
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
Concept-Cartoons as a Tool to Evoke and Analyze Pupils Judgments in Social Science Education
Creators: name: Fenske, Felix
name: Klee, Andreas
name: Lutter, Andreas
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Concept-Cartoon; pupils’ concepts; teacher’s concepts’; judgment processes; judgment strategies; social science education

description: The following contribution makes an effort to place the concept-cartoon-method into the context of social science education. Concept-cartoons (CCs) enable teachers to use the everyday life experiences and individual thoughts of the pupils as a positive enrichment tool within the learning processes. In this context, CCs are very suitable to function as a method to gain information about both the existing mental conceptions and the individual political judgment strategies. Through this, it is possible to put everyday life concepts and scientific knowledge in a constructive relationship, which finally enhances new learning objectives. First the article highlights the relevance of pupils’ and teachers` concepts for judgment processes. On this basis the method of CCs is introduced and evaluated

Der folgende Artikel beschäftigt sich mit den Möglichkeiten des methodischen Einsatzes von Concept-Cartoons im Rahmen sozialwissenschaftlichen Unterrichts. Als Instrumentarium zur Diagnose von Schülervorstellungen und individuellen Urteilsstrategien, bieten Comic-Cartoons den Lehrkräften die Möglichkeit, den Unterricht entlang dieser lernrelevanten Perspektiven zu gestalten. Durch die konstruktive Verknüpfung von Alltagskonzepten und Fachkonzepten können auf diese Weise neue Chancen für nachhaltige Lehr- und Lernprozesse erschlossen werden. Innerhalb dieses Beitrags wird zunächst die Bedeutung von Schülervorstellungen und vorfachlichen Urteilsstrategien für wirksamen sozialwissenschaftlichen Unterricht geklärt. Im Anschluss erfolgt eine Einführung in die Methode „Concept-Cartoons“. Abschließend werden exemplarisch drei von den Autoren gestaltete Cartoons vorgestellt.
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
The Classificiation of Kepler B star Variables
Creators: name: McNamara, Bernard J.
name: Jackiewicz, Jason
name: McKeever, Jean
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The light curves of 252 B-star candidates in the Kepler data base are analyzed in a similar fashion to that done by Balona et al. (2011) to further characterize B star variability, increase the sample of variable B stars for future study, and to identify stars whose power spectra include particularly interesting features such as frequency groupings. Stars are classified as either constant light emitters, $β$ Cep stars, slowly pulsating B stars, hybrid pulsators, binaries or stars whose light curves are dominated by rotation (Bin/Rot), hot subdwarfs, or white dwarfs. One-hundred stars in our sample were found to be either light contants or to be variable at a level of less than 0.02 mmag. We increase the number of candidate B-star variables found in the Kepler data base by Balona et al. (2011) in the following fashion: $β$ Cep stars from 0 to 10, slowly pulsating B stars from 8 to 54, hybrid pulsators from 7 to 21, and Bin/Rot stars from 23 to 82. For comparison purposes, approximately 51 SPBs and 6 hybrids had been known prior to 2007. The number of $β$ Cep stars known prior to 2004 was 93. A secondary result of this study is the identification of an additional 11 pulsating white dwarf candidates, four of which possess frequency groupings.
description: Accepted to Astronomical Journal
Metaphors as a Tool for Diagnosing Beliefs about Teaching and Learning in Social Studies Teacher Education
Creators: name: Szukala, Andrea
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Metaphors; epistemological beliefs; teaching and learning beliefs; teacher education

description: Do domain specific teaching/learning beliefs and epistemological beliefs exist and do they explain a domain specific approach to teaching and learning the social sciences? This paper reports on the first stage of an exploratory qualitative study carried out at the University of Bielefeld in 2010/11 on pre-service social studies teachers (PSST, n=61). It has a threefold aim: First, providing a very short overview of relevant trends in recent research on epistemological beliefs and teaching/learning beliefs and presenting some plausible hypotheses on if and how these belief dimensions are related to each other in the field of social studies education; second, presenting and discussing metaphors as a suitable qualitative research method for diagnosing and analysing the teaching and learning beliefs in the field; third, presenting the general outline of the Bielefeld project and a comparison of two emblematic cases of the project to evaluate the potential advantages and shortcomings of the research design and methods, especially of metaphor analysis.
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
Citizenship Education: Lithuanian Mapping
Creators: name: Zaleskene, Irena
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Exclusion; citizenship education; teacher training

description: Some theoretical concepts of globalisation and citizenship are discussed in the article as well as changing role of citizenship education in transforming Lithuanian Society. The author points out that many problems in contemporary Lithuanian society arise from the fact that the relationship between individuals and the state is changing fundamentally. The state should broaden “positive” choices and support an individual by ensuring principles of equality in basic human rights and access to opportunities. On the other hand, an individual has to take the responsibility for his/her own life becoming a decisive factor in choosing personal life style and in building up civic community. In this respect, it is expected that Citizenship Education would lay an important role in educating competence and attitudes towards own responsibilities, in educating mental and practical skills for positive civic participation. Current status and new approaches of citizenship education in Lithuania are presented in the light of international developments. The article concludes that changing role of citizenship education has significant implications for professional development of teachers and for the national teacher training system as a whole.
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
Fact Sheet: Criteria for becoming a member of a European Network of Living Labs and Research Infrastructures for Agroecology Transition
Creators: name: Mambrini, Muriel
Publisher: name: Zenodo
Year: 2022
Subjects: agroecology
living lab
research infrastructure
network
criteria

description: ALL-Ready fact sheet on criteria for becoming a member of a European Network of Living Labs and Research Infrastructures for Agroecology Transition.
Gesamtausgabe / Entire Issue
Creators: name: JSSE, Administrator
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: -

description: Kein Abstract vorhanden

No Abstract available
description: JSSE - Journal of Social Science Education, 3-2011: Social Science Literacy II: In Search for Basic Competences and Basic Concepts for Testing and Diagnosing
The Widom line and noise power spectral analysis of a supercritical fluid
Creators: name: Han, Sungho
name: Yu, Clare C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We have performed extensive molecular dynamics simulations to study noise power spectra of density and potential energy fluctuations of a Lennard-Jones model of a fluid in the supercritical region. Emanating from the liquid-vapor critical point, there is a locus of isobaric specific heat maxima, called the Widom line, which is often regarded as an extension of the liquid-vapor coexistence line. Our simulation results show that the noise power spectrum of the density fluctuations on the Widom line of the liquid-vapor transition exhibits three distinct $1/f^γ$ behaviors with exponents $γ$= 0, 1.2 and 2, depending on the frequency $f$. We find that the intermediate frequency region with an exponent $γ\sim$ 1 appears as the temperature approaches the Widom temperature from above or below. On the other hand, we do not find three distinct regions of $1/f^γ$ in the power spectrum of the potential energy fluctuations on the Widom line. Furthermore, we find that the power spectra of both the density and potential energy fluctuations at low frequency have a maximum on the Widom line, suggesting that the noise power can provide an alternative signature of the Widom line.
title: Erwerbsminderung und Arbeitsmarkt
title: Arbeitslosigkeit und regionale Unterschiede prägen Zugänge in Erwerbsminderungsrenten
titleType: AlternativeTitle
Creators: name: Brussig, Martin
Publisher: name: DuEPublico: Duisburg-Essen Publications Online, University of Duisburg-Essen, Germany
Year: 2018

description: Auf einen Blick...

Vor dem Hintergrund der schrittweisen Anhebung der Altersgrenze für die Regelaltersrente auf 67 Jahre richtet sich die Aufmerksamkeit zunehmend auf die Erwerbsminderungsrente, die nicht an Altersgrenzen gebunden ist. Denn eine vermutlich wachsende Zahl von Beschäftigten wird vor Erreichen der gestiegenen Regelaltersgrenze nicht mehr leistungsfähig und von Arbeitslosigkeit bedroht sein.
In den letzten Jahren kamen Neuzugänge in Erwerbsminderungsrente (EM-Renten) – anders als beim Zugang in Altersrenten – weniger oft direkt aus einer stabilen Beschäftigung und mit steigender Tendenz aus einer langen Beschäftigungslosigkeit.
EM-Rentner und -Rentnerinnen, die zuvor langzeitbeschäftigungslos waren, erhielten seltener als andere EM-Rentnerinnen und -Rentner vor dem Rentenbeginn medizinische Reha-Maßnahmen der Rentenversicherung. Dies wurde aber nicht durch einen großzügigen EM-Rentenzugang für Langzeitbeschäftigungslose kompensiert. Vorliegende Befunde deuten darauf hin, dass Langzeitbeschäftigungslose öfter als andere zwischen die Sicherungsnetze fallen, die mit Rehabilitation und EM-Rente aufgespannt sind.
Es gibt regionale Unterschiede im EM-Rentenzugang. Sie hängen u.a. mit der regionalen Arbeitsmarktlage zusammen und unterstreichen die Wechselbeziehungen zwischen den Sicherungssystemen bei Arbeitslosigkeit und Erwerbsunfähigkeit.
Für Ältere ist jedoch kein Zusammenhang zwischen der Arbeitsmarktlage und der Inanspruchnahme von EM-Renten festzustellen; Ältere verlassen einen angespannten Arbeitsmarkt wohl eher über eine vorgezogene Verrentung in der Altersrente als über die EM-Rente.
Heterogeneous Highly Parallel Implementation of Matrix Exponentiation Using GPU
Creators: name: Raja, Chittampally Vasanth
name: Balasubramanian, Srinivas
name: Raghavendra, Prakash S
Publisher: name: arXiv
Year: 2012
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Mathematical Software (cs.MS)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The vision of super computer at every desk can be realized by powerful and highly parallel CPUs or GPUs or APUs. Graphics processors once specialized for the graphics applications only, are now used for the highly computational intensive general purpose applications. Very expensive GFLOPs and TFLOP performance has become very cheap with the GPGPUs. Current work focuses mainly on the highly parallel implementation of Matrix Exponentiation. Matrix Exponentiation is widely used in many areas of scientific community ranging from highly critical flight, CAD simulations to financial, statistical applications. Proposed solution for Matrix Exponentiation uses OpenCL for exploiting the hyper parallelism offered by the many core GPGPUs. It employs many general GPU optimizations and architectural specific optimizations. This experimentation covers the optimizations targeted specific to the Scientific Graphics cards (Tesla-C2050). Heterogeneous Highly Parallel Matrix Exponentiation method has been tested for matrices of different sizes and with different powers. The devised Kernel has shown 1000X speedup and 44 fold speedup with the naive GPU Kernel.
description: 15 pages, 12 figures, International Journal of Distributed and Parallel systems (IJDPS) ISSN : 0976 - 9757 [Online] ; 2229 - 3957 [Print]
Unpolite Citizenship: The Non-Place of Conflict in Political Education
Creators: name: Monteiro, Hugo
name: Ferreira, Pedro Daniel
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Unpolite citizenship; conflict; education; political; school

description: This paper considers the role of conflict (its constitutive relevance or erasure) in the concepts and practices of democracy and citizenship. Critically reflecting on contexts of formal and non-formal political education, and on the observed practices and discourse of relevant educational actors, we intend to interrogate the school’s conceptions, misconceptions and/or contradictions around democracy and political participation. Focusing on the arguments surrounding the perspectives oriented towards consensus vs. those embracing dissensus in social and political theories, this article considers the implicit and explicit powers existent or generated in school relationships, which inevitably affect our ways of looking at citizenship and of educating politically

Cet article prétend aborder le rôle du conflit (du point de vue de sa pertinence constitutive ou de son effacement) dans des conceptions et des pratiques de la démocratie ou citoyenneté. Sur la base d’une réflexion critique touchant aux concepts d’éducation politique formelle ou non-formelle, ainsi qu’aux pratiques et discours d’agents centraux de l’action éducationnelle qui ont pu être observés, nous prétendons identifier des concepts, malentendus et/ou contradictions ayant trait aux concepts de démocratie et de participation politique. En examinant les perspectives visant à atteindre un consensus opposées à l’ampleur des divergences au coeur des théories politiques et sociales, cet article se focalise sur des pouvoirs implicites ou explicites, présentifiés ou générés dans des relations scolaires, qui affectent inévitablement notre manière d’envisager la citoyenneté, ainsi que l’action d’éduquer politiquement.
description: JSSE - Journal of Social Science Education, 4-2011: Critical Civic & Citizenship Education
Small-Network Approximations for Geometrically Frustrated Ising Systems
Creators: name: Zhuang, Bilin
name: Lannert, Courtney
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The study of frustrated spin systems often requires time-consuming numerical simulations. As the simplest approach, the classical Ising model is often used to investigate the thermodynamic behavior of such systems. Exploiting the small correlation lengths in frustrated Ising systems, we develop a method for obtaining a first approximation to the energetic properties of frustrated two-dimensional Ising systems using small networks of less than 30 spins. These small networks allow much faster numerical simulations, and more importantly, analytical calculation of the properties from the partition function is possible. We choose Ising systems on the triangular lattice, the Kagome lattice, and the triangular Kagome lattice as prototype systems and find small systems that can serve as good approximations to these prototype systems. We also develop criteria for constructing small networks to approximate general two-dimensional frustrated Ising systems. This method of using small networks provides a novel and efficient way to obtain a first approximation to the properties of frustrated spin systems.
Low temperature FIR and submm mass absorption coefficient of interstellar silicate dust analogues
Creators: name: Coupeaud, A.
name: Demyk, K.
name: Meny, C.
name: Nayral, C.
name: Delpech, F.
name: Leroux, H.
name: Depecker, C.
name: Creff, G.
name: Brubach, J. B.
name: Roy, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cold dust grains emission in the FIR/submm is usually expressed as a modified black body law in which the dust mass absorption coefficient (MAC), is described with a temperature- and wavelength-independent emissivity spectral index, beta. However, numerous data from space and balloon-born missions and recently from Herschel and Planck show that dust emission is not well understood, as revealed by the observed anti-correlation of beta with the grain temperature. In order to give astronomers the necessary data to interpret FIR/submm observations, we synthesised analogues of interstellar amorphous and crystalline silicate grains, rich in Mg and Ca, and having stiochiometry of olivine and pyroxene and measured their MAC, in the 100-1000/1500 \mum range for grain temperatures varying from 300 to 10 K. We find that the grain MAC decreases when the grain temperature decreases and that the local spectral index, beta, defined as the slope of the MAC curve, is anti-correlated with the grain temperature. These variations, which are not observed in the crystallised samples, are related to the amorphous nature of the samples. In addition, the spectral shape of the MAC is complex: at short wavelengths (lambda < 500/700 \mum), beta is in the range 1.6 - 2.1 for all grain temperature and grain composition whereas at longer wavelengths (lambda > 500/700 \mum), beta < 2 for samples with a pyroxene stoichiometry and beta > 2 for samples with an olivine stoichiometry. Hence, the simplifying asymptotic expression based on a single temperature- and wavelength-independent spectral index used by astronomers is not appropriate to describe the dust MAC and thus the dust emission, and may induce significant errors on the derived parameters such as the dust mass and the dust physical and chemical properties. Instead, dust emission models should use the dust MAC as a function of wavelength and temperature.
Macroporous resin purification of phenolics from Irish apple pomace: Chemical characterization, and cellular antioxidant and anti-inflammatory activities
Creators: name: Mohammadi, Nima
name: Guo, Yuyang
name: Wang, Kai
name: Granato, Daniel
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 31
subject: Biological sciences
subject: FOS: Biological sciences

description: Apple pomace (AP) is a highly prevalent waste product worldwide in the fruit processing sector. This study compared the chemical profile, antioxidant, and anti-inflammatory activities of crude (CE) and an extract purified using XAD-7 resin (PE). The purification process increased the total phenolic content, flavonoids, and tannins by 3.35, 40.31, and 8.87-fold, respectively. The main phenolic compounds identified in PE were phlorizin (20.54 mg/g), chlorogenic acid (10.01 mg/g), and hyperoside (2.77 mg/g). No difference was found between CE and PE in protecting human plasma against oxidation. In human erythrocytes, both CE and PE decreased the reactive oxygen species (ROS) generation and decreased lipoperoxidation. However, PE had stronger anti-inflammatory effects than CE by promoting HO-1 gene expression, suppressing NO production, and inhibiting IL-1β, IL-6, and IL-10 mRNA expression in lipopolysaccharide-challenged RAW.264.7 macrophages. Therefore, purifying apple pomace crude extract is a promising approach to boosting valuable antioxidants and anti-inflammatory phenolics.
State-Orchestrated Civic Education versus Civic Competencies of School Students: Some Conceptual Implications from a National Case Study
Creators: name: Dimitrov, Georgi
Publisher: name: sowi-online e.V., Bielefeld
Year: 2011
Subjects: Civic education; cross-country comparative studies; education reform

description: Imagine a situation in which civic education has been enforced and practiced for nearly a decade and, as a result, the civic competences of the young people have dramatically decreased as compared with the previous national level. This situation is not a fictional one. It depicts the findings of a cross-national longitudinal survey. How come a generation which had not been exposed to the influence of civic education performed better in civic competences as compared with their followers a decade later? Who is to blame? The school teachers – for not having fulfilled their obligations? The school system – for failing to accomplish its socialization task? Or the particular civic education program – for being fake or ill-designed? Or may be we, the social scientists, have been unduly naïve about our expectations of civic education and its implementation in schools? The more important question is: to what extent does civic education fit in naturally with school life without clashing with it? Or put in another way, isn’t the classical tradition in the modern school essentially in contradiction with civic education? This problem takes the particular (Bulgarian) case beyond the boundaries of its national specificityand situates it at the level of a much more general question of the limits and preconditions of applicability of civic education, especially in regard to the expectation that it will form active citizens, capable of improving the democratic self-regulation of modern societies. The paper argues that the results of civic education should not be assessed in abstract form apart from the major factors concerning the socio-cultural, institutional and educational context. They are significantly dependent on the character of the national curriculum and the socialization programme specific for each country. Furthermore, schools, in their turn, are highly dependent on the role of civil society in the respective national societies, which feature vastly varying political cultures. The large portion of very low education achievements cannot be adduced to civic education per se, but to the wider alienation of young people from school life.
description: JSSE - Journal of Social Science Education, 4-2011: Critical Civic & Citizenship Education
On Galaxies and Homology
Creators: name: Novak, Gregory S.
name: Jonsson, Patrik
name: Primack, Joel R.
name: Cox, Thomas J.
name: Dekel, Avishai
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The definition of homology for single-component galaxies is clear, but for multi-component (luminous and dark matter) galaxies there is some ambiguity. We attempt to clarify the situation by carefully separating the different concepts of homology that have been used to date. We argue that the most useful definition is that a set of galaxies is homologous if they are the same in all respects up to a set of three dimensional scaling constants which may differ from one galaxy to the next. Noting that we are free to choose the dimensional constants, we find that a set of hydrodynamic simulated galaxy merger remnants is significantly closer to homologous when the dimensional length constant is taken to be the radius containing equal amounts of dark and baryonic matter rather than the usual observationally motivated choice of the baryonic half-mass radius. Once the correct dimensional scaling constants are used, the stellar velocity dispersion anisotropy is essentially the sole source of the variation in the kinematic structure of these simulated merger remnants. In order to facilitate the use of these scaling constants to analyse observed galaxies, we calculated the relationship between our preferred dimensional scaling constants and the typical observationally accessible quantities.
description: 15 pages, 9 figures, 3 tables. Accepted to MNRAS
title: Leni Riefenstahls Olympia – Kunstwerk oder Propaganda?
title: Die Rezeptionsgeschichte des Films in der Vor- und Nachkriegszeit
titleType: Subtitle
Creators: name: Krystek, Justin
Publisher: name: Ruhr-Universität Bochum
Year: 2023
Subjects: subject: 796 Sport

description: Studentische Qualifikationsarbeiten an der Fakultät für Sportwissenschaft der RUB, 21