cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interaction Driven Subgap Spin Exciton in the Kondo Insulator SmB6
Creators: name: Fuhrman, W. T.
name: Leiner, J.
name: Nikolić, P.
name: Granroth, G. E.
name: Stone, M. B.
name: Lumsden, M. D.
name: DeBeer-Schmitt, L.
name: Alekseev, P. A.
name: Mignot, J. -M.
name: Koohpayeh, S. M.
name: Cottingham, P.
name: Phelan, W. Adam
name: Schoop, L.
name: McQueen, T. M.
name: Broholm, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using inelastic neutron scattering, we map a 14 meV coherent resonant mode in the topological Kondo insulator SmB6 and describe its relation to the low energy insulating band structure. The resonant intensity is confined to the X and R high symmetry points, repeating outside the first Brillouin zone and dispersing less than 2 meV, with a 5d-like magnetic form factor. We present a slave-boson treatment of the Anderson Hamiltonian with a third neighbor dominated hybridized band structure. This approach produces a spin exciton below the charge gap with features that are consistent with the observed neutron scattering. We find that maxima in the wave vector dependence of the inelastic neutron scattering indicate band inversion.
Teacher Education in Social Science in Sweden in Historical and Comparative Perspectives
Creators: name: Eklund, Niklas
name: Larsson, Anna
Publisher: name: JSSE - Journal of Social Science Education
Year: 2009

description: In this paper, we will examine teacher education in social science. In the Swedish context, teacher education is part of the university system, but teacher education in social science is differently organized than social science education for other students. Teacher education in social science today is also, as a result of the deregulation at all levels of the Swedish educational system in the 1990s, locally designed and there are significant differences between universities. The aim of this paper is twofold. The first aim is to explore the roots of the current situation in the history of teacher education in social science in Sweden from the mid 1900s and into the early 2000s. The other aim is to describe and discuss comparatively how this education is organized at different Swedish universities today. The analysis revolves around questions about disciplinarity, organization and teacher education as a “trading zone” between the traditional academic disciplinary organization of social science and the conceived needs of the school subject Civics.
description: JSSE - Journal of Social Science Education, 2-2009: Ausbildungsdidaktiken: Lehrerausbildung Didaktik Sozialwissenschaften/Educating Social Science Educators
Improving the Quality of Students’ Judgements Through Assessment for Learning
Creators: name: Davies, Peter
Publisher: name: JSSE - Journal of Social Science Education
Year: 2009

description: Specifications in England and Wales frequently cite improvement in the quality of students’ arguments as a key objective of courses of study for public examinations. More generally, this objective might be seen as a central element in the process of citizenship education. However, there is evidence that progress in the quality of students’ arguments is disappointing relative to other dimensions of their achievement. Research evidence on the differences between informal and formal arguments provides a basis for identifying weaknesses in students’ arguments that might be addressed in teaching. This evidence also suggests ways in which these weaknesses might be addressed. However, this literature provides a generic account of the development of argument, rarely paying attention to differences between different subjects. Drawing on this literature this paper describes an approach to supporting the development of students’ arguments within two curriculum subject areas: geography and business studies. Similarities and differences between the subjects are identified and the way in which these characteristics of arguments have been used with students to develop their arguments is exemplified.
description: JSSE - Journal of Social Science Education, 2-2009: Ausbildungsdidaktiken: Lehrerausbildung Didaktik Sozialwissenschaften/Educating Social Science Educators
Study of Z production in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV in the dimuon and dielectron decay channels
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV, using data collected by the CMS experiment at the LHC. The PbPb data sample corresponds to an integrated luminosity of about 150 inverse microbarns, while the pp data sample collected in 2013 at the same nucleon-nucleon centre-of-mass energy has an integrated luminosity of 5.4 inverse picobarns. The Z boson yield is measured as a function of rapidity, transverse momentum, and collision centrality. The ratio of PbPb to pp yields, scaled by the number of inelastic nucleon-nucleon collisions, is found to be 1.06 +/- 0.05 (stat) +/- 0.08 (syst) in the dimuon channel and 1.02 +/- 0.08 (stat) +/- 0.15 (syst) in the dielectron channel, for centrality-integrated Z boson production. This binary collision scaling is seen to hold in the entire kinematic region studied, as expected for a colourless probe that is unaffected by the hot and dense QCD medium produced in heavy ion collisions.
description: Replaced with published version. Added journal reference and DOI
Stand, Probleme, Perspektiven der Ausbildung im Fachseminar SoWi
Creators: name: Cypionka, Anselm
name: Hornbruch, Heike
name: Kallenbach, Waltraud
Publisher: name: JSSE - Journal of Social Science Education
Year: 2009

description: Über Stand, Probleme und Perspektiven der Ausbildung im Fachseminar Sozialwissenschaften (Wirtschaft und Politik etc.) in der Zweiten Phase der Lehrerausbildung in den 16 Bundesländern gibt es keinen vergleichenden und aktuellen Überblick. Das folgende Gespräch versucht diesem Defizit ansatzweise entgegenzuwirken, indem Fachleiter aus drei Bundesländern (Hessen, Nordrhein-Westfalen, Thüringen) die Situation in ihrem Fachseminar und Arbeitsfeld darstellen und bewerten. Die Informationen und Statements wurden online eingeholt. Die Stellungnahmen wurden untereinander ausgetauscht und gelesen; es wurde aber darauf verzichtet, die einzelnen Positionen untereinander zu kommentieren, da dies die Situation eines natürlichen Gruppeninterviews vor Ort erfordert hätte. Schon ein Blick auf die Tabelle am Ende des Gesprächs zeigt Unterschiede in den Bezeichnungen und der Organisation im Detail auf. Auf der inhaltlichen Ebene zeigen sich aber gemeinsame Probleme, die Berufsanfänger auf dem Weg der Professionalisierung zu bewältigen haben. Das Gespräch soll systematische Bestandsaufnahme und Forschung zur Fachausbildung SoWi im Referendariat anregen. There is no comparative and current overview regarding conditions, problems and perspectives of teacher training in the subject orientated course for student teachers (Fachseminar) prior to second state examination (Staatsexamen) in the field of social sciences (civics, economics and politics etc.). Conditions among the 16 Federal states of Germany differ in detail. The following discussion tries to work against this deficit basically, as specialized leaders from three Federal states (Hessen, North Rhine-Westphalia, Thuringia) represent and evaluate the situation in their field of work. The information and statements were caught up on-line. The statements were exchanged among themselves but not commentated since this would have required the situation of a natural group interview. The table at the end points out significiant differences in the designations and the organization in the detail. On the other hand there seems to be shared/common problems, which novices have to master on their way of professionalization. The discussion aims at fostering systematic documentation and research for subjet orientated social science teacher training in the Referendariat.
description: JSSE - Journal of Social Science Education, 2-2009: Ausbildungsdidaktiken: Lehrerausbildung Didaktik Sozialwissenschaften/Educating Social Science Educators
Dislocation evolution during plastic deformation: Equations vs. discrete dislocation dynamics study
Creators: name: Davoudi, Kamyar M.
name: Vlassak, Joost J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Equations for dislocation evolution bridge the gap between dislocation properties and continuum descriptions of plastic behavior of crystalline materials. Computer simulations can help us verify these evolution equations and find their fitting parameters. In this paper, we employ discrete dislocation dynamics to establish a continuum-based model for the evolution of the dislocation structure in polycrystalline thin films. Expressions are developed for the density of activated dislocation sources, as well as dislocation nucleation and annihilation rates. We demonstrate how size effect naturally enters the evolution equation. Good agreement between the simulation and the model results is obtained. The current approach is based on a two-dimensional discrete dislocation dynamics model, but can be extended to three-dimensional models.
Correlative imaging and spectroscopy of functional layers composed of nanoparticles and molecule aggregates
Creators: name: Oldenburg, Kevin
Publisher: name: Universität Rostock
Year: 2020
Subjects: subject: 530 Physics

description: In this work, heterogeneous structures consisting of copper porphyrins and tetracene are investigated mainly by photoemission electron microscopy (PEEM) in the vicinity of small silver nanoparticles. As shown for silver clusters on a pristine silicon surface, an important effect is strong coupling to the substrate leading to dramatically altered plasmonic properties which have to be treated beyond the commonly employed dipole approximation. By utilizing the plasmonic properties of the nanoparticles, it was possible to locally excite molecular aggregates by the enhanced plasmonic near-field.
Vortex and Meissner phases of strongly-interacting bosons on a two-leg ladder
Creators: name: Piraud, M.
name: Heidrich-Meisner, F.
name: McCulloch, I. P.
name: Greschner, S.
name: Vekua, T.
name: Schollwoeck, U.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We establish the phase diagram of the strongly-interacting Bose-Hubbard model defined on a two-leg ladder geometry in the presence of a homogeneous flux. Our work is motivated by a recent experiment [Atala et al., Nature Phys. 10, 588 (2014)], which studied the same system, in the complementary regime of weak interactions. Based on extensive density matrix renormalization group simulations and a bosonization analysis, we fully explore the parameter space spanned by filling, inter-leg tunneling, and flux. As a main result, we demonstrate the existence of gapless and gapped Meissner and vortex phases, with the gapped states emerging in Mott-insulating regimes. We calculate experimentally accessible observables such as chiral currents and vortex patterns.
description: 4 pages + Supplementary Material
The emergence of scale-free fires in Australia
Creators: name: Nicoletti, Giorgio
name: Saravia, Leonardo
name: Momo, Fernando
name: Maritan, Amos
name: Suweis, Samir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Between 2019 and 2020, during the country's hottest and driest year on record, Australia experienced a dramatic bushfire season, with catastrophic ecological and environmental consequences. Several studies highlighted how such abrupt changes in fire regimes may have been in large part a consequence of climate change and other anthropogenic transformations. Here, we analyze the monthly evolution of the burned area in Australia from 2000 to 2020, obtained via satellite imaging through the MODIS platform. We find that the 2019-2020 peak is associated with signatures typically found near critical points. We introduce a modeling framework based on forest-fire models to study the properties of these emergent fire outbreaks, showing that the behavior observed during the 2019-2020 fire season matches the one of a percolation transition, where system-size outbreaks appear. Our model also highlights the existence of an absorbing phase transition that might be eventually crossed, after which the vegetation cannot recover.
Bayesian Robust Tensor Factorization for Incomplete Multiway Data
Creators: name: Zhao, Qibin
name: Zhou, Guoxu
name: Zhang, Liqing
name: Cichocki, Andrzej
name: Amari, Shun-ichi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We propose a generative model for robust tensor factorization in the presence of both missing data and outliers. The objective is to explicitly infer the underlying low-CP-rank tensor capturing the global information and a sparse tensor capturing the local information (also considered as outliers), thus providing the robust predictive distribution over missing entries. The low-CP-rank tensor is modeled by multilinear interactions between multiple latent factors on which the column sparsity is enforced by a hierarchical prior, while the sparse tensor is modeled by a hierarchical view of Student-$t$ distribution that associates an individual hyperparameter with each element independently. For model learning, we develop an efficient closed-form variational inference under a fully Bayesian treatment, which can effectively prevent the overfitting problem and scales linearly with data size. In contrast to existing related works, our method can perform model selection automatically and implicitly without need of tuning parameters. More specifically, it can discover the groundtruth of CP rank and automatically adapt the sparsity inducing priors to various types of outliers. In addition, the tradeoff between the low-rank approximation and the sparse representation can be optimized in the sense of maximum model evidence. The extensive experiments and comparisons with many state-of-the-art algorithms on both synthetic and real-world datasets demonstrate the superiorities of our method from several perspectives.
description: in IEEE Transactions on Neural Networks and Learning Systems, 2015
Dissipative preparation of Chern insulators
Creators: name: Budich, Jan Carl
name: Zoller, Peter
name: Diehl, Sebastian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Engineered dissipation can be employed to prepare interesting quantum many body states in a non-equilibrium fashion. The basic idea is to obtain the state of interest as the unique steady state of a quantum master equation, irrespective of the initial state. Due to a fundamental competition of topology and locality, the dissipative preparation of gapped topological phases with a non-vanishing Chern number has so far remained elusive. Here, we study the open quantum system dynamics of fermions on a two-dimensional lattice in the framework of a Lindblad master equation. In particular, we discover a mechanism to dissipatively prepare a topological steady state with non-zero Chern number by means of short-range system bath interaction. Quite remarkably, this gives rise to a stable topological phase in a non-equilibrium phase diagram. We demonstrate how our theoretical construction can be implemented in a microscopic model that is experimentally feasible with cold atoms in optical lattices.
Green Tensor Analysis of Lattice Resonances in Periodic Arrays of Nanoparticles
Creators: name: Zundel, Lauren
name: Cuartero-González, Alvaro
name: Sanders, Stephen
name: Fernández-Domínguez, Antonio I.
name: Manjavacas, Alejandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: When arranged in a periodic geometry, arrays of metallic nanostructures are capable of supporting collective modes known as lattice resonances. These modes, which originate from the coherent multiple scattering between the elements of the array, give rise to very strong and spectrally narrow optical responses. Here, we show that, thanks to their collective nature, the lattice resonances of a periodic array of metallic nanoparticles can mediate an efficient long-range coupling between dipole emitters placed near the array. Specifically, using a coupled dipole approach, we calculate the Green tensor of the array connecting two points and analyze its spectral and spatial characteristics. This quantity represents the electromagnetic field produced by the array at a given position when excited by a unit dipole emitter located at another one. We find that, when a lattice resonance is excited, the Green tensor is significantly larger and decays more slowly with distance than the Green tensor of vacuum. Therefore, in addition to advancing the fundamental understanding of lattice resonances, our results show that periodic arrays of nanostructures are capable of enhancing the long-range coupling between collections of dipole emitters, which makes them a promising platform for applications such as nanoscale energy transfer and quantum information processing.
description: 13 pages, 9 figures
Effect of hydrostatic pressures on the superconductivity of new BiS2 based REO0.5F0.5BiS2 (RE-La, Pr and Nd) superconductors
Creators: name: Jha, Rajveer
name: Kishan, H.
name: Awana, V. P. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the impact of hydrostatic pressure on superconductivity of new BiS2 based layered REO0.5F0.5BiS2 (RE-La, Pr, and Nd) compounds through the measurements of dc electrical resistivity. The REO0.5F0.5BiS2 (RE-La, Pr and Nd) compounds synthesized by solid state reaction route via vacuum encapsulation are crystallized in the tetragonal P4/nmm space group. At ambient pressure the superconducting transition onset temperatures are 2.7K, 3.5K and 4.5K which are enhanced substantially under external hydrostatic pressure to 10.5K, 7.8K and 7.5K for LaO0.5F0.5BiS2, PrO0.5F0.5BiS2 and NdO0.5F0.5BiS2 respectively at 1.68GPa. The normal state electrical resistivity decreases with applied pressure for REO0.5F0.5BiS2 (RE-La, Pr and Nd). The electrical resistivity under magnetic field and applied pressure has been measured to estimate upper critical field, the values of which are 15.9Tesla, 8.8Tesla and 8.2Tesla for LaO0.5F0.5BiS2, PrO0.5F0.5BiS2 and NdO0.5F0.5BiS2 compounds. Substantial enhancement of superconductivity under moderate pressures in studied new BiS2 based superconductors call for the attention of condensed matter physics community.
description: 18 pages Text + Figs: Focus issue - Study of Matter at Extreme Conditions - J. Phys. Chem. Solids
Anleitungen zur Unterrichtsplanung in sozialwissenschaftlichen Fächern Bereichsrezension aktueller fachdidaktischer Planungskonzepte
Creators: name: Busch, Matthias
Publisher: name: JSSE - Journal of Social Science Education
Year: 2009

description: Die Bereichsrezension wendet sich aktuellen sozialwissenschaftlichen Planungsdidaktiken zu und untersucht kriteriengeleitet, inwiefern diese die Erkenntnisse und Forderungen der empirischen Bildungsforschung, der Lehr-Lernforschung und der Fachdidaktik aufgreifen und umsetzen. Es zeichnen sich in den Planungsdidaktiken vier unterschiedliche Ansätze ab, die erstens in Tradition zur fachsystematischen Inhalts- und Methodenplanung Walter Gagels stehen, zweitens Unterrichtsplanung handlungssystematisch anhand „selbstläufiger Lernwege“ entwickeln wollen, sich drittens werkorientiert konkreten Guten-Praxis-Beispielen zuwenden und viertens Unterrichtsplanung individualisieren und in die Hände der Lernenden legen. Gemeinsam ist den Ansätzen ein – entgegen den eigenen Ansprüchen – fehlender oder nicht ausreichend begründeter empirischer Nachweis der eigenen Planungsaussagen. Notwendig erscheint deshalb eine an berufsbiographischen Professionalisierungsprozessen und dem realen Planungsverhalten von Lehrkräften orientierte qualitative Planungsforschung. The review turns current lesson planning concepts of social science education and it examines criterion-oriented, if they extent the current results and demands of empirical education research, learn research and social sciences education. Four different paradigms appear: the first stays in tradition to the planning concept of Walter Gagel, the second tries to develop curricula, the third concentrates on good-practice examples and the fourth individualizes lesson planning and gives it into the responsibility of learners. Against their own requirements all schools neglect an empirical proof of their own planning statements. A qualitative planning research – oriented on biographic professionalization and real planning behavior of teachers – seems necessary.
description: JSSE - Journal of Social Science Education, 2-2009: Ausbildungsdidaktiken: Lehrerausbildung Didaktik Sozialwissenschaften/Educating Social Science Educators
Capturing the impact stories from projects, sharing with stakeholders to expand/scale up those successes
Creators: name: Gold, Margaret
Publisher: name: Zenodo
Year: 2022
Subjects: Citizen Science, Impact

description: The Green Deal Project Support Office (GD-SO)  organised a webinar to highlight cutting-edge developments and innovations from Green Deal Call Projects and share those with a wider audience, which took place on 3rd October at 14:30-16:45 and will cover the topic of Citizen Science. Several projects funded under H2020 Green Deal call are working on solutions that will enable citizens to get involved in Green Deal implementation through, among others, citizen science and observation initiatives. The objective of the webinar was to facilitate an exchange of information, experiences (including challenges & barriers) and lessons learned, as well as to identify good practices in citizen science projects. This presentation presented the instrument for capturing Citizen Science Impact stories that was developed by the H2020-funded WeObserve project and the members of the Impact Community of Practice, with the example of the Plastic Spotter clean-up canoes initiative in Leiden, the Netherlands.
Vermittlungswissenschaft. Zur Verwendung sozialwissenschaftlichen Wissens am Beispiel einer Weiterbildung
Creators: name: Grammes, Tilman
Publisher: name: JSSE - Journal of Social Science Education
Year: 2009

description: Dieser Praxisbericht schlägt ein Modell zur Analyse von Lerndynamiken im Spannungsverhältnis von Theorie und Praxis vor: ein relationales anstelle eines additiven Verständnisses von Didaktik als Vermittlungswissenschaft. Fallbeispiel ist eine qualitative Studie zur Verwendung sozialwissenschaftlichen Wissens in der 3. Phase der Professionalisierung. Es handelt sich um eine Weiterbildung für kommunale Bedienstete. Thema ist das „Ausländerproblem“. In einer Re-Analyse des Projekts kann gezeigt werden, wie das Aufeinandertreffen von Alltagswissen und Berufswissen (Verwaltungsrationalität) durch sozialwissenschaftliches Wissen beeinflusst werden kann. Die Beobachtungen sind übertragbar, z.B. auf Lehrerweiterbildungen. This article suggests a model to analyze dynamics of learning processes in the stress ratio of theory and practice: a relational instead of an additional understanding of didactics as mediation science. Case example is a qualitative study for the use of sociological knowledge in the 3rd phase of professionalization. It concerns a further training for local civil servants. Topic is „the foreigner problem “. In a reanalysis of the project can be shown, how meeting one another everyday life knowledge and professional knowledge (reasoning of civil service) can be affected by sociological knowledge. The observations can be generalized for example on teacher further educations.
description: JSSE - Journal of Social Science Education, 2-2009: Ausbildungsdidaktiken: Lehrerausbildung Didaktik Sozialwissenschaften/Educating Social Science Educators
Threshold dynamics of SAIRS epidemic model with Semi-Markov switching
Creators: name: Ottaviano, Stefania
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We study the threshold dynamics of a stochastic SAIRS-type model with vaccination, where the role of asymptomatic and symptomatic infectious individuals is explicitly considered in the epidemic dynamics. In the model, the values of the disease transmission rate may switch between different levels under the effect of a semi-Markov process. We provide sufficient conditions ensuring the almost surely epidemic extinction and persistence in time mean. In the case of disease persistence, we investigate the omega-limit set of the system and give sufficient conditions for the existence and uniqueness of an invariant probability measure.
Quantum-enhanced deliberation of learning agents using trapped ions
Creators: name: Dunjko, Vedran
name: Friis, Nicolai
name: Briegel, Hans J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A scheme that successfully employs quantum mechanics in the design of autonomous learning agents has recently been reported in the context of the projective simulation (PS) model for artificial intelligence. In that approach, the key feature of a PS agent, a specific type of memory which is explored via random walks, was shown to be amenable to quantization. In particular, classical random walks were substituted by Szegedy-type quantum walks, allowing for a speed-up. In this work we propose how such classical and quantum agents can be implemented in systems of trapped ions. We employ a generic construction by which the classical agents are `upgraded' to their quantum counterparts by nested coherent controlization, and we outline how this construction can be realized in ion traps. Our results provide a flexible modular architecture for the design of PS agents. Furthermore, we present numerical simulations of simple PS agents which analyze the robustness of our proposal under certain noise models.
description: 15 pages, 12 figures
Financial, Economic and Political Crises - Carrying Social Science Education on as Before?
Creators: name: Hedtke, Reinhold
Publisher: name: JSSE - Journal of Social Science Education
Year: 2010

description: This issue of the Journal of Social Science Education deals with the financial and economic crises, its causes and the consequences which could be drawn for civic and economic education. As far as economic and civic educators are expected to behave like communicators of established scientific knowledge received from economics or political science, they also are hit by the crisis of these two disciplines which is induced by their severe shortcomings in the crisis. The conventional wisdom of economics or of political science failed to provide an early warning system of potentially dangerous institutions, policies or outcomes. On the contrary, among the main causes of the financial crisis and its political and economic failures are: policy recommendations delivered by the Chicago school of economics, beliefs and decisions of the economic and political elites encouraged by mainstream economics and economic liberalism, and, last but not least, an increasing self-restraint of the state towards the market, fed by political theories based on the idea that (financial) markets should best control themselves. The financial-economic-political crisis cannot be understood without its ideological, institutional and political framework, and this framework cannot be understood without taking into account its foundations in mainstream economics and the economic mode of thinking which is also flourishing in political science. The significant shift of power in favour of the international financial industries has to be considered, too. Disentangling the intricate causes of the intertwined crises and discussing its consequences – also for education at universities – is a challenging task taken up by the authors of this and the next issue of the JSSE.
description: JSSE - Journal of Social Science Education, 1-2010: Civic and Economic Education and the Current Financial Crisis I
Using Invalid Instruments on Purpose: Focused Moment Selection and Averaging for GMM
Creators: name: DiTraglia, Francis J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: In finite samples, the use of a slightly endogenous but highly relevant instrument can reduce mean-squared error (MSE). Building on this observation, I propose a novel moment selection procedure for GMM -- the Focused Moment Selection Criterion (FMSC) -- in which moment conditions are chosen not based on their validity but on the MSE of their associated estimator of a user-specified target parameter. The FMSC mimics the situation faced by an applied researcher who begins with a set of relatively mild "baseline" assumptions and must decide whether to impose any of a collection of stronger but more controversial "suspect" assumptions. When the (correctly specified) baseline moment conditions identify the model, the FMSC provides an asymptotically unbiased estimator of asymptotic MSE, allowing us to select over the suspect moment conditions. I go on to show how the framework used to derive the FMSC can address the problem of inference post-moment selection. Treating post-selection estimators as a special case of moment-averaging, in which estimators based on different moment sets are given data-dependent weights, I propose simulation-based procedures for inference that can be applied to a variety of formal and informal moment-selection and averaging procedures. Both the FMSC and confidence interval procedures perform well in simulations. I conclude with an empirical example examining the effect of instrument selection on the estimated relationship between malaria and income per capita.
Kiloparsec-Scale Simulations of Star Formation in Disk Galaxies III. Structure and Dynamics of Filaments and Clumps in Giant Molecular Clouds
Creators: name: Butler, Michael J.
name: Tan, Jonathan C.
name: Van Loo, Sven
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present hydrodynamic simulations of self-gravitating dense gas in a galactic disk, exploring scales ranging from 1 kpc down to $\sim 0.1$~pc. Our primary goal is to understand how dense filaments form in Giant Molecular Clouds (GMCs). These structures, often observed as Infrared Dark Clouds (IRDCs) in the Galactic plane, are thought to be the precursors to massive stars and star clusters, so their formation may be the rate limiting step controlling global star formation rates in galactic systems as described by the Kennicutt-Schmidt relation. Our study follows on from Van Loo et al. (2013, Paper I), which carried out simulations to 0.5~pc resolution and examined global aspects of the formation of dense gas clumps and the resulting star formation rate. Here, using our higher resolution, we examine the detailed structural, kinematic and dynamical properties of dense filaments and clumps, including mass surface density ($Σ$) probability distribution functions, filament mass per unit length and its dispersion, lateral $Σ$ profiles, filament fragmentation, filament velocity gradients and infall, and degree of filament and clump virialization. Where possible, these properties are compared to observations of IRDCs. By many metrics, especially too large mass fractions of high $Σ>1\:{\rm g\:cm^{-2}}$ material, too high mass per unit length dispersion due to dense clump formation, too high velocity gradients and too high velocity dispersion for a given mass per unit length, the simulated filaments differ from observed IRDCs. We thus conclude that IRDCs do not form from global fast collapse of GMCs. Rather, we expect IRDC formation and collapse is slowed significantly by the influence of dynamically important magnetic fields, which may thus play a crucial role in regulating galactic star formation rates.
description: 26 pages, 15 figures, accepted to ApJ
Soliton transport in tubular networks: transmission at vertices in the shrinking limit
Creators: name: Uecker, Hannes
name: Grieser, Daniel
name: Sobirov, Zarif
name: Babajanov, Doniyor
name: Matrasulov, Davron
Publisher: name: arXiv
Year: 2014
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Soliton transport in tube-like networks is studied by solving the nonlinear Schroedinger equation (NLSE) on finite thickness ("fat") graphs. The dependence of the solution and of the reflection at vertices on the graph thickness and on the angle between its bonds is studied and related to a special case considered in our previous work, in the limit when the thickness of the graph goes to zero. It is found that both the wave function and reflection coefficient reproduce the regime of reflectionless vertex transmission studied in our previous work.
description: 9 pages, 8 figures
Data and matlab code of figures of TCS paper: https://doi.org/10.1016/j.tcs.2023.114179
Creators: name: Omeradzic, Amir
Publisher: name: Zenodo
Year: 2025

description:  Data of OB23b: Progress Analysis of a Multi-Recombinative Evolution Strategy on theHighly Multimodal Rastrigin Function (Theoretical Computer Science)Generate experimental results of OB23b.

Run script (TRIALS can be changed accordingly), plots are generated automatically.* fig1/main_visualize.m: generate Rastrigin contour plot (2D, left) and regular plot (1D, right)* fig2/main_dyn.m: evaluation of quality gain (two configurations N=10, N=100) and its normal approximation. Evaluation is done in muComLam_sSA.m and optimization is stopped after histogram was generated.* fig3/main_phi.m: one-generation experiment phi(sigma). 6 Figures are generated in the end. Fig. 1-3 show left sub-plot (i=2) with approximations phi_i, phi_i(k_i), and phi_i(d_i) with different colors. Figs. 4-6 show right sub-plot (i=12) analogously.* fig4_fig6/main_phi.m: one-generation experiment evaluates both first (Fig. 4) and second order progress rate (Fig. 6) for the same configuration, using two different R-initializations (left & right sub-plots, respectively). Hence, both figures (Fig. 4, Fig. 6) and sub-figures (left, right) are generated running the script once.* fig5_fig7/main_phi.m: same procedure as for fig4_fig6, experiments using larger MU and N.* fig8/main_dyn.m: generates and displays dynamics of 100 trials and corresponding median. Calls fct_iter.m in the end to evaluate iteration using first and second order progress rate. Two configurations (1-2) for left and right sub-plot.* fig9/main_dyn.m: dynamics and iteration. variation of sigma* (choose values from comment), fct_iter.m is called automatically to evaluate iterated dynamics* fig10/main_dyn.m: dynamics and iteration. The two configurations (1,2: left and right sub-plots) can be evaluated by (un)-commenting
„Data Richness“ in Hamburger Schulen
Creators: name: Hahn, Stefan
name: Hejtmanek, Ruth Anna
name: Klein, Esther Dominique
Publisher: name: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung. (PFLB)
Year: 2025

description: Die internationale Schulentwicklungsforschung weist mit Blick auf sich erfolgreich entwickelnde Schulen auf die Bedeutsamkeit der Nutzung unterschiedlicher Daten und wissenschaftlicher Evidenzen hin (z.B. Mandinach & Schildkamp, 2021; Muijs et al., 2004; Rutledge et al., 2015). Auch in Deutschland erhält die Nutzung von Daten im Schulentwicklungsprozess zunehmende Aufmerksamkeit. Ausgehend von Hinweisen auf diverse förderliche Rahmenbedingungen, die die Ausbildung einer „Data Richness“ in Schulen begünstigen, untersucht vorliegender Beitrag, inwiefern ein reichhaltiges Datenangebot durch die Bildungsadministration im Stadtstaat Hamburg eine Entsprechung im Datennutzungsverhalten der Schulen findet. Ergebnisse einer Interviewstudie mit Hamburger Schulleitungen legen nahe, dass Hamburger Schulen sowohl die von der Bildungsadministration bereitgestellten als auch intern generierte Datenbestände intensiv und zielorientiert in ihrer Schulentwicklung nutzen. Dabei berichten sie häufig von der Etablierung organisationaler Regelungen der Datennutzung und Funktionsstellen im mittleren Management, damit Daten für verschiedene Adressat*innengruppen auf Schulleitungs-, Team- und Individualebene ausgewählt und für die pädagogischen Entwicklungskontexte anschlussfähig aufbereitet werden können.
description: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung. (PFLB), Bd. 7 Nr. 1 (2025): PraxisForschungLehrer*innenBildung – Ausgabe 7
Exploring the Abyss. The Financial Crisis of 2008 ff. as a Central Topic of Problem-Centered Social Science Education
Creators: name: Hippe, Thorsten
Publisher: name: JSSE - Journal of Social Science Education
Year: 2010

description: The financial crisis of 2008 ff. and financial crises in general should be a central topic of social science education because these crises are a recurrent and therefore structural feature of modern capitalism which has severe consequences for citizens’ quality of life. Hence, the citizenry should know how to prevent such developments which endanger its well-being in a massive way. Therefore, learners should understand the relationship between the quality of people’s everyday lives and those economic institutions and political decisions which have led to the current mess. They should be enabled to critically evaluate the current misregulation of the financial sector and the economy in order to identify possible policy measures to prevent or at least to mitigate future crises. By educating (young) citizens in this way, the (future) general public can – as a necessary counterweight to the lobbyism of the finance industry – exert more prudent political pressure which gives politicians a greater incentive to regulate the financial sector and the economy in a manner which is beneficial for the vast majority of the people instead of for a small elite. Two core concepts of the social sciences can be used to make the roots of the seemingly complex topic more understandable for learners: liability and inequality.
description: JSSE - Journal of Social Science Education, 1-2010: Civic and Economic Education and the Current Financial Crisis I
title: Adaptation du chapitre sur la compression de données d'un manuel scolaire d'introduction à l'informatique en vue d'un enseignement en première année du gymnase
title: Adaptation du chapitre sur la compression de données d'un manuel scolaire d'introduction à l'informatique en vue d'un enseignement en première année du gymnase
titleType: AlternativeTitle
Creators: name: Morel, Thomas
Publisher: name: Unknown
Year: 0
Subjects: subject: Informatique
subject: Manuel scolaire
subject: Compression
subject: Compression de données
subject: Enseignement de l’informatique
subject: Discipline obligatoire
subject: Transposition didactique
subject: Gymnase

description: L’informatique est en passe de devenir une discipline obligatoire au gymnase. Beaucoup de besoins nouveaux vont naître de ce changement parmi lesquels il y aura la nécessité d’avoir des manuels scolaires à disposition. Le plus simple dans ce cas (le moins coûteux en ressources) est de partir d’un manuel existant et de l’adapter aux besoins du public cible qui nous intéresse. Dans le cadre de ce travail, il a été décidé de partir de l’ouvrage d’André Schiper qui se nomme : « Découvrir le numérique : une introduction à l’informatique et aux systèmes de communication ». Le problème est que cet ouvrage a été conçu pour les élèves de 1ère année de l’EPFL qui ont un niveau plus élevé que les élèves de 1ère année d’école de maturité. Ceci se reflète notamment de le chapitre n°6 portant sur la compression de données où plusieurs notions mathématiques d’un niveau avancé empêchent la bonne compréhension d’un élève de 1ère année d’école de maturité. La question est donc de savoir comment présenter la compression de données à ces élèves ? Comment contourner les difficultés mathématiques ? Quels sont les éléments à maintenir, quels sont ceux dont une reformulation est indispensable ? Quels sont ceux à supprimer, quels sont ceux à ajouter ? C’est en travaillant sur le 6ème chapitre de cet ouvrage, que nous avons tenté de répondre à ces différentes questions.
title: Lernvideos im Chemieunterricht - Untersuchung der Wirksamkeit in Bezug auf Verständnis und Motivation
Creators: name: Stengel, Thomas
Year: 2022

description: Die Digitalisierung ist in der Gesellschaft ein zentrales Thema und präsenter denn je – alle Bereiche des Lebens spüren die Auswirkungen und die dadurch ausgelösten Veränderungen. In den Schulen wurde der Einsatz von digitalen Medien durch die Pandemie verstärkt, jedoch meist nur temporär. Dabei erfreuen sich insbesondere Lernvideos bei Jugendlichen großer Beliebtheit – insbesondere im Feld der Naturwissenschaften. Diese Arbeit geht der Frage nach, in welchem Ausmaß der Einsatz von Lernvideos im Chemieunterricht das Verständnis und die Motivation von Schüler*innen verbessern kann. Im theoretischen Teil wird der fachliche Rahmen gespannt. Hierbei wurde der Fokus auf die Digitalisierung und ihren Einfluss auf die Jugendlichen sowie das individualisierte Lernen gelegt. Zusätzlich wurden Lernvideos definiert, Qualitätskriterien zusammengefasst und Vor- bzw. Nachteile formuliert sowie die Besonderheiten des Chemieunterrichts beleuchtet. Der empirische Teil befasst sich mit einer durchgeführten Befragung, bei der 136 Schüler*innen aus vier verschiedenen Wiener Gymnasien teilnahmen, inklusive daran anschließender Analyse. Hierbei wurde die Wirksamkeit von Lernvideos mithilfe eines Vor- und Nachtests untersucht, wobei die Erfolgsquoten von Verständnisfragen jeweils vor und nach dem Lernvideo miteinander verglichen wurden. Die Analyse zeigt, dass sich die Erfolgsquoten der Schüler*innen durch das Lernvideo statistisch signifikant verbesserten – dies spricht für eine Steigerung des fachlichen Verständnisses der Teilnehmer*innen. Weiters wurde mithilfe der Likert-Skala die Zustimmung der Schüler*innen zu unterschiedlichen Aussagen bezüglich Lernvideos untersucht. Die Auswertung veranschaulicht deutlich, dass die Teilnehmer*innen einen häufigeren Einsatz von Lernvideos bevorzugen würden, da sie diese als ein sehr hilfreiches und sinnvolles Methoden-Werkzeug beim Erlernen sowie besonders beim Wiederholen und Festigen von Lerninhalten empfinden. Die Ergebnisse der Untersuchung legen somit nahe, dass der Einsatz von Lernvideos sowohl die Motivation als auch das Verständnis von Schüler*innen verbessern kann.
title: Fare impresa all’estero: storie di oggetti, storie migranti.
Creators: name: Alemanno, Francesca
Publisher: name: Universität Graz
Year: 2021

description: One way migration culture is manifested is through its materiality, represented by cultural
artefacts, social networks, symbolic emblems or objects of memory, which represent a way
or an instant method to get in touch with one’s past and present existential trajectories.
These objects, in fact, often become symbolic devices capable of nurturing a sense of
belonging in the new world and a link with one’s place of origin.
In this article, we will consider the life story of a migrant who pursued an entrepreneurial
path by trying to open his own business in his destination country, specifically in the city
of Matera in southern Italy.
The case study analysed focuses on the story of Suryabhan and his relationship with a
sacred idol representing the god Ganesh. An ethnographic research method was used, aided
by interviews.
description: Keywords:  Migrant entrepreneurship; materiality; identity; life story; anthropology of migration
description: Mobile Culture Studies. The Journal, Vol. 7 2021, 17–34
Norwegian Civic Education – Beyond Formalism?
Creators: name: Børhaug, Kjetil
Publisher: name: JSSE - Journal of Social Science Education
Year: 2010

description: Norwegian civic education traces its origin almost 200 years back in time. Until World War II, its main focus was on constitutional matters and on the formal structure of governmental institutions. After 1945, and in particular after the 1970s, conceptions of civic education change. Among others, critical perspectives, political participation and democratic ideals became major issues. Have these ideas been able to influence teaching practices? L’éducation civique norvégienne s’est développée depuis presque 200 ans. Jusqu’à la seconde guerre mondiale, le contenu principal portait sur la constitution et la structure formelle des institutions politiques de l’état. Après la guerre, et surtout après 1970, jaillirent de nouvelles idées plus radicales sur l’éducation civique changeant le cadre de l’enseignement. Ces idées amenèrent une reformulation des objectifs fondamentaux basés sur des perspectives critiques, une participation politique plus importante et les idéaux démocratiques. Mais ces idées, ont-elles influencé l’enseignement de cette matière dans les écoles norvégiennes?
description: JSSE - Journal of Social Science Education, 1-2010: Civic and Economic Education and the Current Financial Crisis I
Privacy-Preserving Energy Storage Sharing with Blockchain and Secure Multi-Party Computation
Creators: name: Wang, Nan
name: Chau, Sid Chi-Kin
name: Zhou, Yue
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Energy storage provides an effective way of shifting temporal energy demands and supplies, which enables significant cost reduction under time-of-use energy pricing plans. Despite its promising benefits, the cost of present energy storage remains expensive, presenting a major obstacle to practical deployment. A more viable solution to improve the cost-effectiveness is by sharing energy storage, such as community sharing, cloud energy storage and peer-to-peer sharing. However, revealing private energy demand data to an external energy storage operator may compromise user privacy, and is susceptible to data misuses and breaches. In this paper, we explore a novel approach to support energy storage sharing with privacy protection, based on privacy-preserving blockchain and secure multi-party computation. We present an integrated solution to enable privacy-preserving energy storage sharing, such that energy storage service scheduling and cost-sharing can be attained without the knowledge of individual users' demands. It also supports auditing and verification by the grid operator via blockchain. Furthermore, our privacy-preserving solution can safeguard against a dishonest majority of users, who may collude in cheating, without requiring a trusted third-party. We implemented our solution as a smart contract on real-world Ethereum blockchain platform, and provide empirical evaluation in this paper.
description: This is an updated and extended version of the conference paper "Privacy-Preserving Energy Storage Sharing with Blockchain" in ACM e-Energy 21'