cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Right tail expansion of Tracy-Widom beta laws
Creators: name: Borot, Gaëtan
name: Nadal, Céline
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 60Bxx, 82Bxx, 30Exx

description: Using loop equations, we compute the large deviation function of the maximum eigenvalue to the right of the spectrum in the Gaussian beta matrix ensembles, to all orders in 1/N. We then give a physical derivation of the all order asymptotic expansion of the right tail Tracy-Widom beta laws, for all positive beta, by studying the double scaling limit.
description: 23 pages
Civic Education in Italy: Intended Curriculum and Students' Opportunity to Learn
Creators: name: Losito, Bruno
Publisher: name: sowi-online e.V., Bielefeld
Year: 2003
Subjects: -

description: Civic Education is considered in Italy as one of the most important aims of school education as a whole. Nevertheless, available researches show the existence of a gap between intended curriculum and students' experience at school. Official Civic Education curricula, teaching practices and students' participation in the school life are presented with reference to official documents and to research results. Particular attention is paid to the results of the IEA Civic Education study that involved two different probability samples of students of lower and upper secondary school. The study results show that the Italian students of those school levels have an acceptable knowledge of the main principles governing the functioning of democratic societies, but not a sufficient grounding in certain fundamental aspects of the Italian political and institutional system.
description: JSSE - Journal of Social Science Education, 2-2003: Country Reports
Robust Repetitive Controller for Fast AFM Imaging
Creators: name: Necipoglu, Serkan
name: Cebeci, Selman
name: Has, Yunus
name: Guvenc, Levent
name: Basdogan, Cagatay
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Currently, Atomic Force Microscopy (AFM) is the most preferred Scanning Probe Microscopy (SPM) method due to its numerous advantages. However, increasing the scanning speed and reducing the interaction forces between the probe's tip and the sample surface are still the two main challenges in AFM. To meet these challenges, we take advantage of the fact that the lateral movements performed during an AFM scan is a repetitive motion and propose a Repetitive Controller (RC) for the z-axis movements of the piezo-scanner. The RC utilizes the profile of the previous scan line while scanning the current line to achieve a better scan performance. The results of the scanning experiments performed with our AFM set-up show that the proposed RC significantly outperforms a conventional PI controller that is typically used for the same task. The scan error and the average tapping forces are reduced by 66% and 58%, respectively when the scan speed is increased by 7-fold.
Year 1 report on communication, dissemination and standardisation activities
Creators: name: Napoli, Antonio
Publisher: name: Zenodo
Year: 2022
Subjects: Multi-band networks
Smart AI/ML control plane
packet-opto white boxes
Data Plane
communication
dissemination
standarization

description: The B5G-OPEN WP6 activity is intended to exploit the research and development activities performed by the project partners and leverage the defined B5G-OPEN network architecture, enabling technologies and solutions to be developed. The D6.1 – entitled “Year 1 report on communication, dissemination, and standardisation activities” summarizes the activities carried out within the first year of the project with regard to the three mentioned activities.
 The activities of WP6 (project dissemination and exploitation) include the following objectives (i) creation of the project knowledge site; (ii) developing initial dissemination strategy plans and methods for project dissemination and exploitation; (iii) enabling the communication plan and method across the B5G-OPEN partners, collecting and documenting standards development efforts from B5G-OPEN partners; and (iv) development of an external education plan for defining B5G-OPEN key technologies
"Lehrkunstdidaktik" - Framework and Example of a Definite "Inhaltsdidaktik"
Creators: name: Berg, Hans Christoph
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: According to our experience, didactics as integration of method, subject (syllabi or curricula), and organisation of teaching on the one hand and of theory of education and formation (Bildung) on the other hand is most likely to succeed by concentrating on the composition of Lehrstücke in a case-work manner, which mean not only construction but also composition of the regular teaching units of 10-25 lessons. These regular teaching units are usually thematically, methodologically, and organisationally coherent and now they are developed and composed in three plus one steps: Firstly, the Lehrkunstdidaktik selects only teaching units concerning culturally and educationally as well as personally central subjects, i. e. epochally important humane subjects. Secondly, the Lehrkunstdidaktik composes these teaching units according to, what Lehrkunst calls, the "triad of exemplary-genetical-dramaturgical method". Thirdly, the organisation of teaching orients itself towards culturally authentic learning places, learning times and learning forms. Finally fourthly: all subjects, methods and organisations of teaching have to account for the claims of the theory of education and formation (Bildung). Thus they have to stand the question whether such a teaching unit really has succeeded in combining the free development of the personality with a deep understanding of the world. Only then the teaching unit has become a Lehrstück. In the designing of teaching units to Lehrstücke more than thirty Lehrstücke have arisen on the traces of Wagenschein within the last twenty years. In this process the working manner of the Kollegiale Lehrkunstwerkstatt, a collegial working group of teachers, has proven fine. The same goes for the compositional product of casuistic, enlightened subjective teaching reports, nearly "novels of education" as well as for an overall orientation of didactics not only to the sciences, but also to the arts, thus Lehrkunstdidaktik. In a lexicon of theatre plays there are many hundred works described; we are dreaming of a little lexicon of Lehrstücke. Lately the perspective has arisen that the teaching of Lehrstücke, Lehrstückunterricht, can offer a contribution to the educational teaching development.
description: JSSE - Journal of Social Science Education, 1-2004: Best Practice Lessons and Lesson Study
Detecting the Higgs boson(s) in LambdaSUSY
Creators: name: Bertuzzo, Enrico
name: Farina, Marco
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We reconsider the Higgs bosons discovery potential in the LambdaSUSY framework, in which the masses of the scalar particles are increased already at tree level via a largish supersymmetric coupling between the usual Higgs doublets and a Singlet. We analyze in particular the interplay between the discovery potential of the lightest and of the next-to-lightest scalar, finding that the decay modes of the latter should be more easily detected at the LHC.
description: 9 pages, 2 figures
Niecierpek drobnokwiatowy
Creators: name: Sierka, Edyta
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Chmura D., Sierka E. (2005). Niecierpek drobnokwiatowy. Mongolski najeźdźca. Przyroda Górnego Śląska 41, 13.
Core Curriculum: Strategies for Searching for a Lesson Model in Social and Civic Education, and Its Criteria
Creators: name: Grammes, Tilman
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: "Best Practice" performances of model curricula and lessons/units (Lehrstücke) – do they exist in social and civic education? This article demonstrates eight strategies and concepts of the subject throughout history in order to identify a tradition. Those model curricula are based on different levels of general education according to Wolfgang Klafki: 'Fundamental', 'Exemplary', 'Typical', 'Classical', and 'Representative'. The so-called paradigm of categorical conflict didactics (kategoriale Konfliktdidaktik) leads to a logical core curriculum which enables students to discover and reflect the processes of decision-making in everyday democracy which are value based. Three modes of acting out this grammar and the logic of politics in the classroom are shown. Development of such lesson models is especially recommended as a pragmatic strategy of medium-term curriculum reform in periods of public financial shortage to maintain standards in social studies education.
description: JSSE - Journal of Social Science Education, 1-2004: Best Practice Lessons and Lesson Study
Electric potentials and field lines for uniformly-charged tube and cylinder expressed by Appell's hypergeometric function and integration of $Z(u|m) \mathrm{sc}(u|m)$
Creators: name: Takahashi, Daisuke A.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The closed-form expressions of electric potentials and field lines for a uniformly-charged tube and cylinder are presented using elliptic integrals and Appell's hypergeometric functions, where field lines are depicted by introducing the concept of the field line potential in axisymmetric systems, whose contour lines represent electric field lines outside the charged region, thought of as an analog of the conjugate harmonic function in the presence of non-uniform metric. The field line potential for the tube shows a multi-valued behavior and enables us to define a topological charge. The integral of $Z(u|m)\operatorname{sc}(u|m)$, where $ Z $ and $ \operatorname{sc} $ are the Jacobi zeta and elliptic functions, is also expressed by Appell's hypergeometric function as a by-product, which was missing in classical tables of formulas.
description: 5 pages, 7 figures, final version published in J. Phys. Soc. Jpn
Editorial: Best Practice Performances of Model Curricula (Lehrkunst) and Lesson Study - Two Concepts and a Joint Venture in the Field of Subject Didactics?
Creators: name: Grammes, Tilman
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: JSSE - Journal of Social Science Education, 1-2004: Best Practice Lessons and Lesson Study
Adelphocorisella tamdaoensis Kim, Chérot, Phan & Jung, 2025, sp. nov.
Creators: name: Kim, Junggon
name: Chérot, Frédéric
name: Phan, Quoc Toan
name: Jung, Sunghoon
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Miridae
Adelphocorisella
Adelphocorisella tamdaoensis

description: 1. Adelphocorisella tamdaoensis sp. nov.
Specimen examined. [ISNB] Holotype: 1♂, Tam Dao National Park, Vinh Phuc Province, Vietnam, 25– 28.viii.2010, Constant J. & Limbourg P. leg. (FC n° 11064).
Distribution. Vietnam.
Host. Unknown.
description: Published as part of Kim, Junggon, Chérot, Frédéric, Phan, Quoc Toan & Jung, Sunghoon, 2025, Two new species of the tribe Mirini (Hemiptera: Heteroptera: Miridae: Mirinae) from Vietnam, with additional data to Vietnamese Mirinae catalogue, pp. 555-564 in Zootaxa 5604 (4) on page 561, DOI: 10.11646/zootaxa.5604.4.7, http://zenodo.org/record/15214163
The Helium Abundance in the Ejecta of U Scorpii
Creators: name: Maxwell, M. P.
name: Rushton, M. T.
name: Darnley, M. J.
name: Worters, H. L.
name: Bode, M. F.
name: Evans, A.
name: Eyres, S. P. S.
name: Kouwenhoven, M. B. N.
name: Walter, F. M.
name: Hassall, B. J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: U Scorpii is a recurrent nova which has been observed in outburst on 10 occasions, most recently in 2010. We present near-infrared and optical spectroscopy of the 2010 outburst of U Sco. The reddening of U Sco is found to be $E(B-V) = 0.14\pm0.12$, consistent with previous determinations, from simultaneous optical and near-IR observations. The spectra show the evolution of the line widths and profiles to be consistent with previous outbursts. Velocities are found to be up to 14000\,kms$^{-1}$ in broad components and up to 1800\,kms$^{-1}$ in narrow line components, which become visible around day 8 due to changes in the optical depth. From the spectra we derive a helium abundance of $N$(He)/$N$(H)$ = 0.073\pm0.031$ from the most reliable lines available; this is lower than most other estimates and indicates that the secondary is not helium-rich, as previous studies have suggested.
description: Accepted for publication in MNRAS
The Genetic Principle as a Link between Everyday Knowledge and Politics - The Art-of-Teaching Workshop about the Topic "Future"
Creators: name: Petrik, Andreas
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: This article demonstrates, how didactics of social sciences can turn its focus from theoretical conceptions to the arrangement of learning processes. It simulates a best practice ("Lehrkunst") workshop (I.1.) which compares seven teaching units about the key topic "future" (I.2.). Two typical problems become concrete: exchangeable topics and the transfer to abstract categories. The genetic principle is introduced as a possible remedy: It combines categories with concepts and chooses special topics ("exemplars") that involve students in processes of discovery (II.3.). The concept "future" (Prognosis – Utopia – Political Planning) (I.4.) can be taught in several genetic ways: concentrating on the student's political ideas (individual genesis, II.1.), on the development of scientific findings and social inventions (scientific genesis and genesis of ideas, II.2.), on the simulation of political processes in "embryonic societies" (spontaneous or institutional genesis, II.3.), on the establishment of social innovations and on the historical development of political ideas (historical and human genesis, both II.4.). Conclusion: The genetic principle appears to be a helpful instrument for developing the core curriculum of civic education (II.5.)
description: JSSE - Journal of Social Science Education, 1-2004: Best Practice Lessons and Lesson Study
Systematic approach to calculations of flammability limits of fuel diluent mixtures in air
Creators: name: Bade Shrestha, Shiva Om
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: TP 343 B33 1993
subject: Fuels - Flammability - Testing
subject: Gas as fuel - Flammability - Testing
subject: Heat of combustion

description: Bibliography: p. 112-113.
Enclosing walls: a study of architectural function in the American southwest
Creators: name: Kenzle, Susan C.
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: E 99 P9 K45 1993
subject: Pueblo architecture - Utah
subject: Pueblo architecture - Colorado
subject: Pueblo Indians - Antiquities
subject: Indian architecture - North America

description: Bibliography: p. 183-201.
In Search for the Best Constitution
Creators: name: Leps, Horst
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: "What is the best constitution and the best form of life for most nations and mankind? It is first, a form of everyday life that the majority of people is able to conduct, and which is the constitution most nations could adapt to easily." (Aristotle) Till today, this Aristotelian question is the central question of political philosophy and institution building. To solve this question, on the one hand Aristotle referred back to a concept by Herodot, which distinguishes between monarchy, oligarchy and democracy. On the other hand, he used the analysis made by Plato in his famous work "Politeia". Aristotle collected, described and compared about 158 constitutions of his time. He discovered two basic conditions which guarantee a stable community and are suitable for ordinary people: a well balanced social structure and possibilities for participation that are accessible to all social groups. Pupils are involved in this historical process of social discovery by simulation and thinking exercises. During the project they experience practically and work out theoretically the possible threat to community and state institutions. They create their favourite political system - partly from their own imagination and partly by consulting the work of Aristotle. Finally they design a social and a political system. In doing so they gain knowledge and deep insight in respect to the tasks and difficulties that a political system should be able to cope with and solve. This will lead them, in the future, to a better understanding of their own nation's constitution.
description: JSSE - Journal of Social Science Education, 1-2004: Best Practice Lessons and Lesson Study
Heat and mass transfer within granular beds
Creators: name: Khalil, Emad Boshra Fawzy
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: TJ 260 K48 1993
subject: Heat engineering
subject: Heat - Transmission
subject: Mass transfer
subject: Secondary recovery of oil - Mathematical models
subject: Thermodynamics

description: Bibliography: p. 100-104.
On 2-Holonomy
Creators: name: Abbaspour, Hossein
name: Wagemann, Friedrich
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Topology (math.AT)
subject: Mathematical Physics (math-ph)
subject: K-Theory and Homology (math.KT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C08 (Primary) 17B55, 53C05, 53C29, 55R40 (Secondary)

description: We construct a cycle in higher Hochschild homology associated to the 2-dimensional torus which represents 2-holonomy of a non-abelian gerbe in the same way the ordinary holonomy of a principal G-bundle gives rise to a cycle in ordinary Hochschild homology. This is done using the connection 1-form of Baez-Schreiber. A crucial ingredient in our work is the possibility to arrange that in the structure crossed module mu: g -> h of the principal 2-bundle, the Lie algebra h is abelian, up to equivalence of crossed modules.
Gas and dust in the BCD galaxy VII Zw 403 (UGC 6456)
Creators: name: Egorov, O. V.
name: Lozinskaya, T. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Based on the results of the earlier spectroscopic observations with the 6-m BTA telescope of the SAO RAS we refine the metallicity estimates of the complexes of ionized gas in the VII Zw 403 galaxy. Infrared observations from the Spitzer Space Telescope are used to search for a possible correlation of the mass fraction distribution of the polycyclic aromatic hydrocarbons (PAH) with the distribution of ionized and neutral hydrogen, and with the metallicity of gas in the HII regions of the galaxy.
description: 10 pages, 4 figures, 3 tables
ptc_2021_Giro.pdf
Creators: name: Giro, Riccardo Angelo
Publisher: name: figshare
Year: 2021
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: 170203 Knowledge Representation and Machine Learning
subject: FOS: Psychology
subject: 91406 Petroleum and Reservoir Engineering
subject: FOS: Environmental engineering
subject: Applied Computer Science

description: This paper presents an innovative machine learning methodology that leverages on long-term vibroacoustic measurements to perform automated predictions of the needed pigging operations in crude oil trunk lines. Historical pressure signals have been collected by Eni (e-vpms® monitoring system) for two years on discrete points at a relative distance of 30-35 km along an oil pipeline (100 km length, 16” ID diameter pipes) located in Northern Italy. In order to speed up the activity and to check the operation logs, a tool has been implemented to automatically highlight the historical pig operations performed on the line. Such a tool is capable of detecting, in the observed pressure measurements, the acoustic noise generated by the travelling pig. All the data sets have been reanalyzed and exploited by using field data validations to guide a decision tree regressor (DTR). Several statistical indicators, computed from pressure head loss between line segments, are fed to the DTR, which automatically outputs probability values indicating the possible need for pigging the pipeline. The procedure is applied to the vibroacoustic signals of each pair of consecutive monitoring stations, such that the proposed predictive maintenance strategy is capable of tracking the conditions of individual pipeline sections, thus determining which portion of the conduit is subject to the highest occlusion levels in order to optimize the clean-up operations. Prediction accuracy is assessed by evaluating the typical metrics used in statistical analysis of regression problems, such as the Root Mean Squared Error (RMSE).
Editorial: Economic Education and Constructivist Didactics
Creators: name: Fischer, Andreas
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: Against the background of constructivist theories, this article is on the lookout for complex teaching-learning arrangements and participant-activating methods for economic education as well as it investigates didactic models that are part of the didactic discourse since the 1970s. Among other things, the didactic principle of the hands-on approach is being analysed critically. It is emphasized that didactic concepts centre on intervening measures of teachers that understand learning as a process directed from the outside and see contents to be imparted as an objectively given structure. The writer argues for economic didactics as a scientific discipline to examine the different existing approaches and forms to design didactic concepts

theories that help in explaining teaching situations in economic classes from a constructivist perspective. In its role as a service provider economic didactics should make recommendations on broadening teacher and learner activities to enable self-responsibility and individuality of the single person.
description: JSSE - Journal of Social Science Education, 2-2004: Constructivism
Learning Tasks for Self-Directed Learning in Economic Classes (in German)
Creators: name: Gerdsmeier, Gerhard
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: This article discusses questions about appropriate task formats and their curricular-substantial construction as well as implications for teacher qualification. Different types of tasks (decision tasks, exploring tasks, analysing tasks, assessing tasks, interpretation tasks, hermeneutic tasks and creative tasks) are being discussed. In the framework of this article it is concluded that decision tasks are dominant in economic classes. These different types of tasks are characterized by different formats. This is to say that a task as a model of reality can be well- so to say "completely-" structured or ill- so to say "partly-" structured. Oftentimes ill-structured tasks enable learners to understand structures during their operating process. On this account, the writer argues for a more open process and more space for higher complexity and self-directed learning. For this purpose teachers have to manage creativity, framing and application problems for a reasonable task conception.
description: JSSE - Journal of Social Science Education, 2-2004: Constructivism
G. Helmig, B. Scholkmann, M. Untermann (Hrsg.), Centre, Region, Periphery. Medieval Europe Basel 2002
Creators: name: Röber, Ralph
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2020

description: Rezension zu: G. Helmig, B. Scholkmann, M. Untermann (Hrsg.), Centre, Region, Periphery. Medieval Europe Basel 2002. 3rd International Conference of Medieval and Later Archaeology, Basel (Switzerland) 10.-15. September 2002, Preprinted Papers. Folio-Verlag Dr. G. Wesselkamp, Hertingen 2002. 3 Bde. Bd. 1 (ISBN 3-930327-08-2) 606 S., Bd. 2 (ISBN 3-930327-09-0) 436., Bd. 3 (ISBN 3-930327-10-4) 330 S., jeweils mit diversen Abbildungen
description: Fundberichte aus Baden-Württemberg, Bd. 28 Nr. 1 (2005): Fundberichte aus Baden-Württemberg
MPEC 2023-M155 : 2019 XC3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Willkommener Abschied – und das Ende der Stadt als Form?
Creators: name: Brandt, Sigrid
Publisher: name: ICOMOS – Hefte des Deutschen Nationalkomitees
Year: 2020

description: ICOMOS – Hefte des Deutschen Nationalkomitees, Bd. 69 (2019): ICOMOS – Hefte des Deutschen Nationalkomitees
A Spitzer IRAC Imaging Survey for T Dwarf Companions Around M, L, and T Dwarfs: Observations, Results, and Monte Carlo Population Analyses
Creators: name: Carson, Joseph
name: Marengo, Massimo
name: Patten, Brian
name: Luhman, Kevin
name: Sonnett, Sarah
name: Hora, Joseph
name: Schuster, Michael
name: Allen, Peter
name: Fazio, Giovanni
name: Stauffer, John
name: Schnupp, Carolin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report observational techniques, results, and Monte Carlo population analyses from a Spitzer Infrared Array Camera imaging survey for substellar companions to 117 nearby M, L, and T dwarf systems (median distance of 10 pc, mass range of 0.6 to \sim0.05 M\odot). The two-epoch survey achieves typical detection sensitivities to substellar companions of [4.5 μm] \leq 17.2 mag for angular separations between about 7" and 165". Based on common proper motion analysis, we find no evidence for new substellar companions. Using Monte Carlo orbital simulations (assuming random inclination, random eccentricity, and random longitude of pericenter), we conclude that the observational sensitivities translate to an ability to detect 600-1100K brown dwarf companions at semimajor axes greater than ~35 AU, and to detect 500-600K companions at semimajor axes greater than ~60 AU. The simulations also estimate a 600-1100K T dwarf companion fraction of < 3.4% for 35-1200 AU separations, and < 12.4% for the 500-600K companions, for 60-1000 AU separations.
description: 35 pages, 6 figures
Yield of exciton dissociation in a donor-acceptor system
Creators: name: Li, Guangqi
name: Nitzan, Abraham
name: Ratner, Mark A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A simple model is constructed to describe dissociation of charge transfer excitons in bulk heterojunction solar cells, and its dependence on the physical parameters of the system. In bulk heterojunction organic photovoltaics (OPVs), exciton dissociation occurs almost exclusively at the interface between the donor and acceptor, following one-electron initial excitation from the HOMO to the LUMO levels of the donor, and charge transfer to the acceptor to make a charge-transfer exciton. After exciton breakup, and neglecting the trapping of individual carriers, the electron may undergo two processes for decay: one process involves the electron and/or hole leaving the interface, and migrating to the electrode. This is treated here as the electron moving on a set of acceptor sites. The second loss process is radiationless decay following recombination of the acceptor electron with the donor cation; this is treated by adding a relaxation term. These two processes compete with one another. We model both the exciton breakup and the subsequent electron motion. Results depend on tunneling amplitude, energetics, disorder, Coulomb barriers, and energy level matchups, particularly the so-called LUMO/LUMO offset.
description: 17 pages, 8 figures
title: Grands Challenges Accélérés
Publisher: name: GENCI : Grand Équipement National de Calcul Intensif
Year: 2025

description: Classiquement, la période de mise en production de nouveaux supercalculateurs offre l’opportunité pour des utilisateurs académiques et industriels d’accéder à des ressources de calcul pouvant aller jusqu’à l’intégralité́ de la machine, permettant ainsi de mener à bien des projets scientifiques hors normes, sélectionnés sur leur intérêt scientifique et sociétal. Cette période, appelée « Grands Challenges » et instaurée par GENCI pour toutes ses acquisitions de calculateurs depuis 2008, permet également le « rodage » des nouveaux équipements en testant leur robustesse sur des codes à grande échelle, poussant ainsi leurs capacités aux limites avant de signer la réception au constructeur. Côté développeur, ces « Grands Challenges » sont également l’occasion de faire progresser les codes,  de les porter sur de nouvelles architectures et de tester le passage à l’échelle.
The generalized non-conservative model of a 1-planet system - revisited
Creators: name: Migaszewski, Cezary
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We study the long-term dynamics of a planetary system composed of a star and a planet. Both bodies are considered as extended, non-spherical, rotating objects. There are no assumptions made on the relative angles between the orbital angular momentum and the spin vectors of the bodies. Thus, we analyze full, spatial model of the planetary system. Both objects are assumed to be deformed due to their own rotations, as well as due to the mutual tidal interactions. The general relativity corrections are considered in terms of the post-Newtonian approximation. Besides the conservative contributions to the perturbing forces, there are also taken into account non-conservative effects, i.e., the dissipation of the mechanical energy. This dissipation is a result of the tidal perturbation on the velocity field in the internal zones with non-zero turbulent viscosity (convective zones). Our main goal is to derive the equations of the orbital motion as well as the equations governing time-evolution of the spin vectors (angular velocities). We derive the Lagrangian equations of the second kind for systems which do not conserve the mechanical energy. Next, the equations of motion are averaged out over all fast angles with respect to time-scales characteristic for conservative perturbations. The final equations of motion are then used to study the dynamics of the non-conservative model over time scales of the order of the age of the star. We analyze the final state of the system as a function of the initial conditions. Equilibria states of the averaged system are finally discussed.
description: 37 pages, 13 figures, accepted to Celestial Mechanics and Dynamical Astronomy
Das älteste Gebäude Wertheims
Creators: name: Numberger, Markus
name: Preßler, Karsten
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2020

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 49 Nr. 3 (2020)
What Would You Decide on? Decision Tasks in Economic Classes at Business Schools – A Didactical Analysis with Regard to Self-Directed Learning (in German)
Creators: name: Goeckede, Britta
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: Presently, self-directed learning is an important demand in the educational and didactical discourse. Implementing tasks in class is a way to involve students actively. This article discusses the question to what extent two selected exemplary tasks used in economic classes enable learners to self-direct their solution-finding-process. The special nature of both tasks only allows solutions in the form of economic decisions, which means that the solution-finding-process is a decision-making-process. This investigation discusses what a complete and ideal decision-making-process proves to be. This knowledge will then provide a basis for evaluating the tasks in terms of to what extent the learners perform this decision-making-process while they are working on it. Finally, the so called "decision tasks" are analyzed on the criteria of complexity and openness to make a statement about the impact of internal and external control. In the framework of this text analysis, we arrive at the conclusion that the tasks taken into consideration allow self-directed processing only in small parts, but an opening seems to be possible while they are being used in class.
description: JSSE - Journal of Social Science Education, 2-2004: Constructivism
Instructive or Constructive Teaching Approaches in the Economic Education?
Creators: name: Dubs, Rolf
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: Even if the polarizing discussion about instructive and constructive teaching approaches is widely overcome, some misapprehensions still seem to distort the discourse. Thereby thesis, like the future of teaching would only lie in self-directed, process-oriented, casuistic and interdisciplinary learning (predominantly constructivist paradigms) and instructed, product-oriented, systematic and discipline-oriented instructive teaching and learning would be replaced, emerge. This absoluteness is challenged in this article. Possibly the trend towards "moderate constructivism" alludes to which one of both approaches will succeed in future. Though hands-on and self-directed learning in complex problem situations plays a central role in constructivist theories, because it opens ranges of options and contributes to a holistic understanding of coherences, this type of learning still requires a certain amount of instructed knowledge. Self-directed learning therefore excludes a completely independent process of content and goal setting by learners in order that education does not get lost in arbitrariness. Here, instruction is not understood as decided tutorial for teaching and learning, but teacher-conducted stimuli that are supposed to assist the formation of significant knowledge and the process of gaining competencies.
description: JSSE - Journal of Social Science Education, 2-2004: Constructivism
Factors that influence neurite outgrowth from retinal non-projection neurons
Creators: name: Kljavin, Ivar J.
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: QP 479 K54 1993
subject: Retina - Cytochemistry
subject: Neural circuity
subject: Photoreceptors
subject: Neural transmission

description: Bibliography: p. 133-165.
Study of Anisotropic Black Branes in Asymptotically anti-de Sitter
Creators: name: Iizuka, Norihiro
name: Maeda, Kengo
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the four dimensional gravitational theories which admit homogeneous but anisotropic black brane solutions in asymptotically AdS space-time. The gravitational theories we consider are 1) Einstein-Maxwell-dilaton theory, and 2) Einstein-Maxwell-dilaton-axion theory with SL(2,R) symmetry. We obtain the solutions both analytically and numerically. Analytical solutions are obtained by perturbation from the isotropic solutions. Our solutions approach singular behavior at the horizon in the extremal limit but in non-extremal case, they are smooth everywhere. We also discuss how the third law of thermodynamics holds in our set-up.
description: 31 pages, 12 figures
An analysis of the effectiveness of a joint commodity and foreign exchange rate futures hedge: the case of a Canadian crude oil trader
Creators: name: Klusa, Lawrence Joseph
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: HG 6047 P47 K58 1993
subject: Commodity exchanges - Canada
subject: Petroleum industry and trade - Canada
subject: Petroleum industry and trade - United States
subject: Hedging (Finance) - Mathematical models
subject: Futures market - Mathematical models

description: Bibliography: p. 97-105.
Harmonic lasing in X-ray FELs
Creators: name: Schneidmiller, E. A.
name: Yurkov, M. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Harmonic lasing in a free electron laser with a planar undulator (under the condition that the fundamental frequency is suppressed) might be a cheap and efficient way of extension of wavelength ranges of existing and planned X-ray FEL facilities. Contrary to nonlinear harmonic generation, harmonic lasing can provide much more intense, stable, and narrow-band FEL beam which is easier to handle due to the suppressed fundamental frequency. In this paper we perform a parametrization of the solution of the eigenvalue equation for lasing at odd harmonics, and present an explicit expression for FEL gain length, taking into account all essential effects. We propose and discuss methods for suppression of the fundamental harmonic. We also suggest a combined use of harmonic lasing and lasing at the retuned fundamental wavelength in order to reduce bandwidth and to increase brilliance of X-ray beam at saturation. Considering 3rd harmonic lasing as a practical example, we come to the conclusion that it is much more robust than usually thought, and can be widely used in the existing or planned X-ray FEL facilities. In particular, LCLS after a minor modification can lase to saturation at the 3rd harmonic up to the photon energy of 25-30 keV providing multi-gigawatt power level and narrow bandwidth. As for the European XFEL, harmonic lasing would allow to extend operating range (ultimately up to 100 keV), to reduce FEL bandwidth and to increase brilliance, to enable two-color operation for pump-probe experiments, and to provide more flexible operation at different electron energies. Finally, in this paper we discover that in a part of the parameter space, corresponding to the operating range of soft X-ray beamlines of X-ray FEL facilities (like SASE3 beamline of the European XFEL), harmonics can grow faster than the fundamental wavelength.
8-Valent Fuzzy Logic for Iris Recognition and Biometry
Creators: name: Popescu-Bodorin, N.
name: Balas, V. E.
name: Motoc, I. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: F.4.1; I.2.4
subject: 03B52, 03B50, 03B80

description: This paper shows that maintaining logical consistency of an iris recognition system is a matter of finding a suitable partitioning of the input space in enrollable and unenrollable pairs by negotiating the user comfort and the safety of the biometric system. In other words, consistent enrollment is mandatory in order to preserve system consistency. A fuzzy 3-valued disambiguated model of iris recognition is proposed and analyzed in terms of completeness, consistency, user comfort and biometric safety. It is also shown here that the fuzzy 3-valued model of iris recognition is hosted by an 8-valued Boolean algebra of modulo 8 integers that represents the computational formalization in which a biometric system (a software agent) can achieve the artificial understanding of iris recognition in a logically consistent manner.
description: 6 pages, 2 figures, 5th IEEE Int. Symp. on Computational Intelligence and Intelligent Informatics (Floriana, Malta, September 15-17), ISBN: 978-1-4577-1861-8 (electronic), 978-1-4577-1860-1 (print), 2011
Social Constructivism – Society as Construction (in German)
Creators: name: Siebert, Horst
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: Constructivism is a theory of cognition based on the science of neurons that emphasizes the operational closeness and structure determination of the human perception and thinking processes. Learning as well is a self-acting, creative construction of knowledge. The learning process can be activated, but not directed by teaching efforts. The construction of knowledge is not only an individual mental process. On the one hand society itself constructs knowledge, on the other hand society is a result of constructions. The social constructivism, as conceived by P. Berger, T. Luckmann, J. Searle, K. Gergen, is especially inspiring for social science education. A differentiation between different forms of construction is suggested: reconstruction, deconstruction, self-construction, co-construction.
description: JSSE - Journal of Social Science Education, 2-2004: Constructivism
"Heavenly bodies": a written accompaniment to the thesis exhibition
Creators: name: Bader, Edward Allan
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: ND 249 B22 A4 1993
subject: Bader, Edward Allan - Exhibitions
subject: Art - Philosophy
subject: Male nude in art
subject: Nude in art

description: Bibliography: p. 45-48.
The Backward World of Economists – A Dilemma of Perception (in German)
Creators: name: Bendixen, Peter
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: Human acting has the form of a cycle that encloses phases of sensual perception and cognitive processing as mental efforts and phases of physical intervention in the world of things. Every acting, as well economic acting, is mentally prepared. Acting is subject to conditions of the physiology and psychology of thinking and engraved pictorial recollections of memory shaped by former experiences. Figures emanate that ought to be carried out. The traditional economy has closed itself to this wide, culturally affected cycle of thinking and acting and focuses on the mechanics of optimal arrangements of things, the so called production factors. Modern economic thinking has to open itself to the broad scope of its cognitive object and understand intellectual powers as the basics of economy.
description: JSSE - Journal of Social Science Education, 2-2004: Constructivism
Making QCD Lattice Data Accessible and Organized through Advanced Web Interfaces
Creators: name: Di Pierro, Massimo
name: Hetrick, James
name: Cholia, Shreyas
name: Skinner, David
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Digital Libraries (cs.DL)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Gauge Connection at qcd.nersc.gov is one of the most popular repositories of QCD lattice ensembles. It is used to access 16TB of archived QCD data from the High Performance Storage System (HPSS) at the National Energy Research Scientific Computing Center (NERSC). Here, we present a new web interface for qcd.nersc.gov which allows physicists to browse and search the data, as well as download individual files or entire ensembles in batch. Our system distinguishes itself from others because of its ease of use and web based workflow.
Zeichnungen von Paul Egell
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 4 Nr. 6 (1951): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
There are layers to this: a social ecological examination of social relationships and health
Creators: name: Garmon, Jeannie
Publisher: name: No Publisher Supplied
Year: 2021

description: Rationale: This study sought to understand how loneliness, adverse childhood experiences (ACEs) and perceived neighborhood connection are related to self-reported physical and mental health, both individually and through their interactions. Based on the literature and the social ecological model, five empirical hypotheses reflecting the expected relationships between the social connection variables and self-reported physical and mental health were generated and assessed in this study. Methods: This secondary data analysis utilized data collected through two community health needs assessments (CHNAs) conducted in New Jersey between 2018 and 2019. Holt-Lunstad’s 2018 adaptation of the social ecological model was applied to these data to examine the individual and interaction effects of loneliness, ACEs, and perceived neighborhood connection on physical and mental health. Multivariate regression analyses and interaction effects regression models were used to test assess the hypotheses. Results: Loneliness, ACE score, and perceived neighborhood connection were each found to have a statistically significant relationship with physical and mental health, after controlling for the sociodemographic variables and sleep. Multiple moderation analyses of the conditional effect of ACEs on health by loneliness and perceived neighborhood connection found that, with physical health as the outcome variable, the interaction between loneliness and ACEs was significant, but the interaction between ACEs and perceived neighborhood connection with physical health as the outcome variable was not; neither interaction was significant with mental health as the outcome variable. Finally, perceived neighborhood connection was found to moderate the relationship between loneliness score and physical health, but not the relationship between loneliness score and mental health. Conclusion: The 2018 social ecological model as adapted by Holt-Lunstad offers a useful public health framework for exploring the relationships between social relationships and health. Use of the adapted model can guide the development of future research aimed at understanding the different levels of the social system as well as the generation of interventions to address those crosscutting issues that emerge. Further research is needed to develop a deeper understanding of the health impacts of interactions between loneliness, ACEs, and perceived neighborhood connection with the goal of developing successful interventions to address their potential health effects.
Wolfgang La Baume, Die pommerellischen Gesichtsurnen
Creators: name: Hinz, Hermann
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Wolfgang La Baume, Die pommerellischen Gesichtsurnen. Kataloge Vor- und frühgeschichtlicher Altertümer, Nr. 17. Mainz 1963. 164 Seiten, 27 Tafeln mit 1311 Abbildungen, 3 Karten, 1 Typentafel im Text.
description: Bonner Jahrbücher, Bd. 164.1964: Bonner Jahrbücher
"What is My Part in It?" – The Importance of Constructivism for Historical-Political Learning in School (in German)
Creators: name: Völkel, Bärbel
Publisher: name: sowi-online e.V., Bielefeld
Year: 2004
Subjects: -

description: The article at hand assumes that deprecating utterances of students with regard to history and politics classes could be a sign of a deficit of legitimization. Furthermore the writer hypothesizes that students are willing to deal with historical and political matters if they are able to derive an "active shaping of a sustainable path of life" (see Jung 2001, 17). In this context the importance of history as a historical social science is reflected. If we manage to enlarge the range of primary experiences of present with the secondary experiences of history it will be possible to construct "a tradition of acting". Consequently, changes can be perceived and ascribed to the acting of people in periods. According to this background, a more intensive cooperation between the social reference sciences history and politics seems to be preferable and essential. The cognitive model of constructivism composes the theoretical reference frame of the considerations at hand.
description: JSSE - Journal of Social Science Education, 2-2004: Constructivism