cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Glass-Fritless Cu Alloy Pastes for Silicon Solar Cells Requiring Low Temperature Sintering
Creators: name: Yoshida, M.
name: Tokuhisa, H.
name: Itoh, U.
name: Sumita, I.
name: Sekine, S.
name: Kamata, T.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 858-860
description: This paper describes a novel Cu paste for low temperature sintering, which is necessary to fabricate
electrodes on transparent conductive films in hetero-junction solar cell. To this end, glass fritless Cu alloy pastes
containing a low melting point alloy were prepared. The pastes were evaluated in terms of printability, contact
resistance, line resistance, adhesive property, diffusion of Cu in Si, and oxidation resistance. As a result, it can be
concluded that the pastes would be applicable for silicon solar cells requiring low temperature process.
A Deep Search For Faint Galaxies Associated With Very Low-redshift C IV Absorbers: III. The Mass- and Environment-dependent Circumgalactic Medium
Creators: name: Burchett, Joseph N.
name: Tripp, Todd M.
name: Bordoloi, Rongmon
name: Werk, Jessica K.
name: Prochaska, J. Xavier
name: Tumlinson, Jason
name: Willmer, C. N. A.
name: O'Meara, John
name: Katz, Neal
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using Hubble Space Telescope Cosmic Origins Spectrograph observations of 89 QSO sightlines through the Sloan Digital Sky Survey footprint, we study the relationships between C IV absorption systems and the properties of nearby galaxies as well as large-scale environment. To maintain sensitivity to very faint galaxies, we restrict our sample to 0.0015 < z < 0.015, which defines a complete galaxy survey to L > 0.01 L* or stellar mass log M_* > 8 Msun. We report two principal findings. First, for galaxies with impact parameter rho < 1 rvir, C IV detection strongly depends on the luminosity/stellar mass of the nearby galaxy. C IV is preferentially associated with galaxies with log M_* > 9.5 Msun; lower mass galaxies rarely exhibit significant C IV absorption (covering fraction f = 9 +12-6% for 11 galaxies with log M_* < 9.5 Msun). Second, C IV detection within the log M_* > 9.5 Msun population depends on environment. Using a fixed-aperture environmental density metric for galaxies with rho < 160 kpc at z < 0.055, we find that 57+/-12% (8/14) of galaxies in low-density regions (regions with fewer than seven L > 0.15 L* galaxies within 1.5 Mpc) have affiliated C IV absorption; however, none (0/7) of the galaxies in denser regions show C IV. Similarly, the C IV detection rate is lower for galaxies residing in groups with dark-matter halo masses of log Mhalo > 12.5 Msun. In contrast to C IV, H I is pervasive in the CGM without regard to mass or environment. These results indicate that C IV absorbers with log N(C IV) > 13.5 cm^-2 trace the halos of log M_* > 9.5 Msun galaxies but also reflect larger scale environmental conditions.
description: 26 pages, 13 figures. ApJ, in press
title: Einsatz einer webbasierten Softwarelösung zur Echtzeitkollaboration in technisch-orientierten Studienfächern
Creators: name: Quindeau, Pascal
name: Hoseini, Sayed
name: Kaufmann, Jonas
name: Quix, Christoph
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Kollaboration
subject: Scholarship of Teaching and Learning
subject: Future Skills
subject: Data Science

description: Hochschulen stehen vor der Herausforderung, Kernkompetenzen mit zunehmend technischem Fokus zu vermitteln. Neben den fachlichen Aspekten gewinnen auch Schlüsselqualifikationen wie Kollaborationskompetenz an Bedeutung. Die durch die Corona-Pandemie zusätzlich gegebenen Herausforderungen für die Lehre rücken auch die Entwicklung neuer Lehr-/Lern-Konzepte in den Vordergrund. Dieser Beitrag zeigt, wie der Einsatz einer webbasierten Lehr- und Lernplattform für Echtzeitkollaboration die Gruppenarbeit zwischen Studierenden fördern kann und sie in der Lösung technisch-orientierter Aufgabenstellungen unterstützt. Die Lehr- und Lernplattform wurde zunächst in zwei techniknahen Veranstaltungen in unterschiedlichen Bachelor-Studiengängen integriert. Unter dem Ansatz des Scholarship of Teaching and Learning erfolgte eine Evaluation des eingeführten Lehr-/Lern-Konzeptes aus Lehrenden- und Studierendenperspektive über Erfahrungsberichte und ein Prä-/Post-Design. Der Beitrag stellt die Konzepte und Auswertungen dar. Diese zeigen, dass das Lehr-/Lern-Konzept unter Berücksichtigung des Vorbereitungsaufwandes eine messbare Verbesserung unterschiedlicher (in einem Fragebogen abgebildeter) Skalen hinsichtlich Kollaboration und Umgang mit technisch-orientierten Aufgabenstellungen mit sich bringt.
Energy Payback Time and Life-Cycle Greenhouse-Gas Emissions of CIGS PV: Best Current Estimates
Creators: name: Kim, H.C.
name: Fthenakis, V.M.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Environmental Impacts, Recycling and Waste Management

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3826-3830
description: In this paper, we estimate the life-cycle energy and greenhouse-gas (GHG) emissions from cradle-togate
of thin-film copper indium gallium diselenide (CIGS) PV, based on values given in the literature. First, we
reviewed published life-cycle-based studies of CIGS PV to compare the assumptions of, and data used by different
researchers. Variations included, but were not limited to the amount of glass, metals, encapsulation materials, and
energy use in depositing thin-films, and in manufacturing the modules. The electricity usages account for the largest
primary-energy consumption. Our own estimates, based on what we believe are plausible parameters in mature
production, yielded an energy payback time of 0.8-1.1 yrs under the Southern European solar irradiation of 1700
kWh/m2/yr for CIGS PV. The GHG emissions under the same condition range from 15-21 g CO2-eq./kWh. These
estimates need confirmation using industrial- production data.
Climate Service Replicability Report
Creators: name: Freddy Rivas,
name: Jesús Ortuño,
name: David De La Fuente,
name: Perez, Patricia
name: Cure, José
name: Sanderson, Michael
name: Terrado, Marta
name: López, Javier
name: Toscano, Piero
name: Texeira, Marta
Publisher: name: Zenodo
Year: 2022

description: This document describes the Climate replicability and provides a competitive analysis under the Colombian coffee context.
title: Erstellung und Einsatz von 360-Grad-Medien in der Lehre – leicht gemacht
Creators: name: Braun, Christoph
name: Kayali, Fares
name: Moser, Thomas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: 360-Grad
subject: Online
subject: VR
subject: Einsatzszenarien
subject: Laborlehre

description: Seit dem Wintersemester 2020 werden an der österreichischen Fachhochschule St. Pölten in Form einer synchron abgehaltenen Online-Laborlehreinheit, Inhalte zur Ausstattung und Funktionsweise der im Makers‘ Lab vorzufindenden Maschinen, mit Unterstützung von 360-Grad-Ansichten, vermittelt. Abseits von technisch aufwändig erstellten Projektarbeiten im Bereich Virtual-Reality, soll mit diesem Beitrag bewusst gezeigt werden, wie auch bereits mit Grundkenntnissen der Medientechnik sowie wenig Zeit- und Ressourcenaufwand, für die Lehre sinnvoll einsetzbare Lehrmaterialien erstellt werden können. Anhand eines Praxisbeispiels werden dazu technische und didaktische Gestaltungsentscheidungen sowie Aufwände präsentiert.
Quantum Vertex Model for Reversible Classical Computing
Creators: name: Chamon, C.
name: Mucciolo, E. R.
name: Ruckenstein, A. E.
name: Yang, Z. -C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Computational Complexity (cs.CC)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Mappings of classical computation onto statistical mechanics models have led to remarkable successes in addressing some complex computational problems. However, such mappings display thermodynamic phase transitions that may prevent reaching solution even for easy problems known to be solvable in polynomial time. Here we map universal reversible classical computations onto a planar vertex model that exhibits no bulk classical thermodynamic phase transition, independent of the computational circuit. Within our approach the solution of the computation is encoded in the ground state of the vertex model and its complexity is reflected in the dynamics of the relaxation of the system to its ground state. We use thermal annealing with and without 'learning' to explore typical computational problems. We also construct a mapping of the vertex model into the Chimera architecture of the D-Wave machine, initiating an approach to reversible classical computation based on state-of-the-art implementations of quantum annealing.
description: Updated to accepted version
Effect of Top Cell on Temperature Dependence of Double-Junction Thin Film Silicon Solar Cells
Creators: name: Sriprapha, K.
name: Limmanee, A.
name: Piromjit, C.
name: Sitthiphol, N.
name: Kittisontirak, S.
name: Sangkhawong, P.
name: Moollakorn, A.
name: Titiroongruang, W.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2872-2875
description: We investigated the temperature dependence of double-junction thin film silicon solar cells using different
kinds of top cells; a-Si:H/μc-Si:H and a-SiO:H/μc-Si:H double-junction solar cells. We focused on the difference in the
temperature coefficient (TC) due to bandgap of the materials which used in the top cells. Experimental results indicated that
the values of TC for cell efficiency () of the double-junction thin film silicon solar cells were inversely proportional to the
initial open-circuit voltage (Voc) which corresponds to the bandgap of the top cells. The TC for  of typical a-Si:H/μc-Si:H
and a-SiO:H/μc-Si:H were -0.34 and -0.32%/oC, respectively. It can be concluded that bandgap of the top cell obviously
influenced TC of the double-junction solar cells, and the solar cells using wide bandgap a-SiO:H film in the top cells are
suitable for using in high temperature regions.
title: Strukturierte Erfassung von individuellem Verhalten in Gruppensituationen mit xAPI
Creators: name: Rennecke, Paul
name: Ehlenz, Matthias
name: Heinemann, Birte
name: Schroeder, Ulrik
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Unterrichtsbeobachtung
subject: xAPI
subject: Potentialanalyse
subject: Collaboration Analytics

description: Die systematische Beobachtung von Verhalten und zwischenmenschlicher Interaktion stellt in vielen Bereichen der Bildungslandschaft eine Schlüsselmethode dar. Kooperation, Kollaboration und das soziale Miteinander bei der Lösung von Herausforderungen lässt sich durch Clickstreams und Log-Files nur schwerlich abbilden. Deshalb erfolgt die Beobachtung von Lernenden oft (zusätzlich) durch erfahrene, geschulte Kräfte, die in der Regel vorgefertigte Beobachtungsbögen nutzen und selten digitale Werkzeuge. Die vorgestellte Arbeit ermöglicht die Digitalisierung in diesem Anwendungsfeld einen Schritt voranzubringen. Hierzu wurde eine Webapplikation entwickelt, die die strukturierte Beobachtung von Individuen in Gruppensituationen unterstützt und erweitert. Durch Nutzung von Standards wie xAPI und JSON sind die Barrieren für künftige Integration in bestehende Systeme, sowohl im Bereich Learning Analytics als auch in den Potentialanalysen so gering wie nur möglich. Der modulare, konfigurierbare Ansatz lässt darüber hinaus weitere Anwendungsgebiete wie Videographie von Kollaborationsituationen, das Feedback in Lehrversuchen oder die Beobachtung von Probanden im Labor ohne Programmieraufwand offen.
Crystalline Si Solar Cells: Where Microelectronics Meets Photovoltaics
Creators: name: Baert, K.
name: Dross, F.
name: Gordon, I.
name: Horzel, J.
name: John, J.
name: Posthuma, N.E.
name: Mertens, P.
name: Mertens, R.
name: Poortmans, J.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 827-830
description: The Si-PV industry has to systematically reduce its manufacturing cost in order to reach grid parity for
the main markets in the coming decade. Industrial production at a cost of 1 Euro/Wp is becoming reality. Increasing
cell efficiencies is a prominent pathway in view of the strong leverage on costs of materials in the module fabrication
sequence. In order to further reduce Euro/Wp costs, eventually down to the 0.5 Euro/Wp level, it seems inevitable to
reduce the amount of Si used per Wp, and substitute expensive and non-sustainable materials such as Ag. It is clear
that the dominant position of crystalline Si solar cells on the market was partially achieved thanks to the existing
knowledge and equipment base within the context of micro(nano)-electronics, although the cost drivers in both cases
are principally different: cost/functionality reduction for microelectronics versus cost/Wp for photovoltaics. In order
to achieve the ambitious goals stated higher, it makes sense to have a closer look how the process and analysis
toolbox available in the microelectronics area can be used at the benefit of the further development of crystalline Sibased
photovoltaic devices.
Business Plan, Technology transfer and IPR report
Creators: name: Jesús Ortuño,
name: Freddy Rivas,
name: Patricia Pérez,
name: Franco, Antonio
name: Federico Caboni,
name: Locci, Riccardo
name: Graça, Antonio
name: Alessandro Dell'Aquila,
name: Luigi Ponti (ENEA).
name: Luigi Ponti (ENEA).
Publisher: name: Zenodo
Year: 2022

description: This document will present the results of a competitive market analysis of already existing climate services and components relevant to MED-GOLD. This deliverable aims to constitute the basis for subsequent exploitation of MED-GOLD exploitable results, including the actual technical innovation/knowledge transfer and concrete business models to be adopted with regards to the project’s results.
Evaporation Spectrum of Black Holes from a Local Quantum Gravity Perspective
Creators: name: Barrau, Aurélien
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit the hypothesis of a possible line structure in the Hawking evaporation spectrum of black holes. Because of nonperturbative quantum gravity effects, this would take place arbitrarily far away from the Planck mass. We show, based on a speculative but consistent hypothesis, that this naive prediction might in fact hold in the specific context of loop quantum gravity. A small departure from the ideal case is expected for some low-spin transitions and could allow us to distinguish several quantum gravity models. We also show that the effect is not washed out by the dynamics of the process, by existence of a mass spectrum up to a given width, or by the secondary component induced by the decay of neutral pions emitted during the time-integrated evaporation.
description: 4 pages, accepted by Phys. Rev. Lett
Evaluation and Assessment of the ASPIRE Concept: A New Integrated mc-Si Cell and Module Design for High-Efficiencies
Creators: name: Romijn, I.G.
name: Mewe, A.A.
name: Kossen, E.
name: Cesar, I.
name: Bende, E.E.
name: Van Den Donker, M.N.
name: Van Eijk, P.
name: Granneman, E.H.A.
name: Vermont, P.
name: Weeber, A.W.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1432-1437
description: The majority of commercial crystalline Si cell production is carried out on p-type crystalline silicon using an H-patterned cell
concept with full aluminum rear surface. To decrease the Euro/Watt-peak price, higher efficiencies have to be reached while
using less material. In this paper, the ASPIRe cell concept is put forward as a candidate to further these goals. In the ASPIRe
cell two technologies are combined: 1) Metal wrap through technology; reducing the front metal coverage and moving all
contacts to the rear, and 2) dielectric rear side passivation; reducing the bow for thinner wafers, increasing the rear
passivation and reflection, and reducing the metal consumption due to rear grid instead of full area aluminum. To evaluate
the ASPIRe concept, ASPIRe cells have been modeled using 2D simulation methods. Depending on the resistivity of the rear
side metallization, and on the full area BSF quality, a relative efficiency gain of 2 to 4% was calculated for ASPIRe cells
compared to full aluminum rear MWT cells. Using industrially applied Al2O3 as rear passivating layer and optimized rear
metallization patterns, ASPIRe cells with higher Jsc*Voc and FFs close to their full Al references were be made. One final
bottleneck for the industrialization of the ASPIRe concept is a cost effective way to form of a good local BSF below the
metal lines. Cost and environmental calculations show that, once this is solved, the ASPIRe concept indeed enables lower
Euro/Watt-peak and shorter energy-payback-times than the standard cell concept.
title: Das VR Klassenzimmer als Experimentallabor für die systematische Erforschung der Blickbewegungen von Lehrkräften
Creators: name: Heinemann, Birte
name: Hennig, Deborah
name: Ismail, Ali
name: Schroeder, Ulrik
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Eye-Tracking
subject: Lehrerbildung
subject: Virtual Reality
subject: Learning Analytics
subject: Klassenraummanagement
subject: pädagogische Professionalisierung

description: Die Forschung zeigt, dass sich die Blickmuster von Menschen unterschiedlicher Professionalisierungsstufen unterscheiden, so auch bei Lehrkräften. Doch die genaue Untersuchung in realem Unterricht ist aufwändig und die Forschung ist kaum standardisierbar. Diese Lücke kann durch das VR Klassenzimmer geschlossen werden. Der Beitrag stellt den aktuellen Stand der Forschung vor und präsentiert die Möglichkeiten des VR Klassenzimmers zur standardisierten und systematischen Erforschung des Blickverhaltens von Lehrkräften, insbesondere dem Vergleich von verschiedenen Erfahrungsstufen im Klassenraummanagement.
Industrially Feasible Rear Side Concept for n-Type Silicon Solar Cells Approaching 700 mV of Voc
Creators: name: Suwito, D.
name: Jäger, U.
name: Benick, J.
name: Janz, S.
name: Hermle, M.
name: Preu, R.
name: Glunz, S.W.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1443-1445
description: n-Type silicon as base material offers a great potential for highly efficient solar cells. In this work we
present an industrially feasible approach for the rear passivation and contacting of n-type cells on the basis of
phosphorous doped amorphous silicon carbide in combination with a laser process (PassDop). The PassDop layer
deposited by plasma enhanced chemical vapor deposition (PECVD) fulfills three requirements at the same time: (i) The
recombination at the passivated surface is reduced to surface recombination velocities (SRV) as low as 3 cm/s. (ii) The
layer acts as a dopant source during a laser process yielding local back surface fields (LBSF) underneath the metal
contact points reducing the SRV at the very contact area to below 3000 cm/s. (iii) The PassDop layer in combination
with evaporated aluminium results in an effective rear reflectance of 93±1 % of the cells including the metallization
points. On low temperature high-efficiency n-type solar cell structures this approach proved to be extremely reproducible
and led to efficiencies of up to 22.4 % (Voc=701 mV, FF=80.1 %).
Fostering empathy in social Virtual Reality through physiologically based affective haptic feedback
Creators: name: Hecquard, Jeanne
name: Saint-Aubert, Justine
name: Pacchierotti, Claudio
name: Argelaguet, Ferran
name: Lécuyer, Anatole
name: Macé, Marc
Publisher: name: Zenodo
Year: 2023

description: Presentation delivered by project partner Jeanne Hecquard during a SECTG cluster meeting targeted to Early Stage Researchers (ESRs) on November 23rd, 2023.
title: Vermittlung von algorithmischer Denkweise mittels Game-based Learning
Creators: name: Edler, Andreas
name: Hobert, Sebastian
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Algorithmisches Denken
subject: Game-Based Learning
subject: Technology-Enhanced Learning

description: Algorithmisches Denken nimmt in allen Fachbereichen eine zunehmend stärkere Bedeutung ein. Dies wird u.a. durch die zunehmende Digitalisierung verstärkt. Die Vermittlung von algorithmischem Denken nimmt daher an Bedeutung zu. Aus diesem Grund verfolgt diese Demonstration das Ziel, das Vermitteln von algorithmischem Denken mit einem spielerischen Ansatz zu adressieren. Hierzu gibt die Demonstration einen Einblick in die technische Implementierung einer Game-Based Learning App, die das Ziel hat Lernende spielerisch an eine algorithmische Denkweise heranzuführen, indem grafische Programmierübungsaufgaben bereitgestellt werden.
Climate Related Initiatives Interactions Report no.4
Creators: name: M Sanderson
Publisher: name: Zenodo
Year: 2021

description: This report gives an update on work summarised in D6.12, which described interactions between MED-GOLD and other initiatives as part of task 6.1. This task specifically is pursuing dissemination synergies with other EU initiatives such as Climate-KIC, JPI Climate, FACE-JPI, JPI Water and related ERA-NET (e.g. ERA-NET on Climate Services) as well as clustering with other climate service-related EC funded projects via H2020 or other complementary programmes (e.g. LIFE, Copernicus, PRIMA, etc.). There is also a focus on getting involved with other agriculture-related initiatives that include a significant climate component.
title: Interaction of reading and assessment behavior
Creators: name: Menze, Dennis
name: Seidel, Niels
name: Kasakowskij, Regina
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: reading analytics
subject: learning analytics
subject: assessment
subject: sequential pattern mining

description: Reading and assessment are elementary activities for knowledge acquisition in online learning. Assessments represented as quizzes can help learners to identify gaps in their knowledge and understanding, which they can then overcome by reading the corresponding text-based course material. Reversely, quizzes can be used to evaluate reading comprehension. In this paper, we examine the interactions between reading and quiz activities using scroll and log data from an online undergraduate course (N=142). By analyzing processes and sequential patterns in user sessions, we identified six session clusters for characteristic reading and quiz patterns potentially relevant for adaptive learning support. Using these session clusters, we further clustered students by their reading and quiz behavior over six time periods within the semester. The results hypothesize a personalization for seven groups of learners characterized by their temporal activity and predominant quiz and reading behavior.
Regularity for free interface variational problems in a general class of gradients
Creators: name: Arroyo-Rabasa, Adolfo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49J20, 49J35, 49N60, 49Q20 (primary), 49J45 (secondary)

description: We present a way to study a wide class of optimal design problems with a perimeter penalization. More precisely, we address existence and regularity properties of saddle points of energies of the form $$ (u,A) \quad \mapsto \quad \int_Ω2fu \; \text{d}x \; - \int_{Ω\cap A} σ_1 \mathscr A u \cdot \mathscr A u \; \text{d}x \; - \int_{Ω\setminus A} σ_2\mathscr A u\cdot \mathscr A u \; \text{d}x \; + \; \text{Per}(A;\overline Ω),$$ where $Ω$ is a bounded Lipschitz domain, $A\subset \mathbb R^N$ is a Borel set, $u:Ω\subset \mathbb R^N \to \mathbb R^d$, $\mathscr A$ is an operator of gradient form, and $σ_1, σ_2$ are two not necessarily well-ordered symmetric tensors. The class of operators of gradient form includes scalar- and vector-valued gradients, symmetrized gradients, and higher order gradients. Therefore, our results may be applied to a wide range of problems in elasticity, conductivity or plasticity models. In this context and under mild assumptions on $f$, we show for a solution $(w,A)$, that the topological boundary of $A \cap Ω$ is locally a $\rm{C}^1$-hypersurface up to a closed set of zero $\mathscr H^{N-1}$-measure.
description: The final publication is available at Springer via http://dx.doi.org/10.1007/s00526-016-1085-5
title: AgileBoard4Teaching: Ein interaktives Tool zur Unterstützung und Begleitung agiler Unterrichtsgestaltung
Creators: name: Wurm, Zora
name: Kreidenweis, Melanie
name: Strickroth, Sven
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Agile Unterrichtsgestaltung
subject: CSCL
subject: Unterstützungstool

description: In dieser Demo wird das digitale Tool AgileBoard4Teaching zur Unterstützung eines agil gestalteten Unterrichts vorgestellt. Das Tool in Form eines Kanban-Boards erlaubt Schüler*innen sowohl das selbstorganisierte Lernen als auch die selbstständige und dynamische Dokumentation des Arbeitsfortschritts. Weiterhin unterstützt es Lehrkräfte bei der Unterrichtsgestaltung und Durchführung. Es ist offline nutzbar, intuitiv bedienbar, ermöglicht eine einfache Verteilung von Aufgaben und gibt einen schnellen Überblick über die Arbeitsstände für Lehrende und Lernende.
Low Temperature Fabrication of Microcrystalline Silicon Thin Films Using Microwave Remote-Plasma Enhanced Chemical Vapor Deposition
Creators: name: Yoshiba, S.
name: Goh, L.W.
name: Dhamrin, M.
name: Kamisako, K.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2890-2892
description: As narrow band gap layer for stacked thin film and tandem solar cells, microcrystalline silicon has
gained a great interest in the recent years due to its high red response. In addition, microcrystalline silicon has no
light induced degradation. In this work, deposition of microcrystalline silicon thin films for solar cells was performed
at low temperatures using microwave remote-plasma enhanced chemical vapor deposition (remote-PECVD)
technique and their structures and characteristics were investigated. Deposition temperature was varied from 40 oC to
200 oC. The deposited films on glass and silicon substrates were analyzed and characterized by X-ray diffraction, E2
peak intensity, dark-conductivities and hydrogen bonds density using Fourier-transform infrared spectrometer.
Crystallization was observed even at low temperature as low as room temperature and high quality crystallization of
silicon thin films became obvious at temperatures exceeding 80 oC. The deposited thin films tend to crystallize due to
the increase of substrate temperature. The microwave remote-PECVD method can be very effective to produce c-
Si:H thin films for solar cells at relatively low temperatures by selecting well optimized deposition parameters.
Climate Related Initiatives Interactions Report no.3
Creators: name: M Sanderson
Publisher: name: Zenodo
Year: 2020

description: This report gives an update on work summarised in RD.1 and RD.2, which described interactions between MED-GOLD and other initiatives as part of task 6.1. This task specifically is pursuing dissemination synergies with other EU initiatives such as Climate-KIC, JPI Climate, FACE-JPI, JPI Water and related ERA-NET (e.g. ERA-NET on Climate Services) as well as clustering with other EC funded projects related to climate services via H2020 or other complementary programmes (i.e. ClimatEurope, LIFE, Copernicus, PRIMA, etc.). There is also a focus on getting involved with other initiatives related to agriculture that include a significant climate component.. This deliverable focuses on the period December 2019 to November 2020. There were no deviations from the DoA.
Bulk Lifetime Enhancement by Firing Steps in Back Contacted Multicrystalline Solar Cells
Creators: name: Ferré, R.
name: Harder, N.-P.
name: Mühleisen, W.
name: Herlufsen, S.
name: Ulzhöfer, C.
name: Schubert, M.C.
name: Wade, R.
name: Mertens, V.
name: Brendel, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1438-1442
description: We study bulk lifetime enhancement of p-type multicrystalline silicon (mc-Si) wafers for back
contacted solar cells, in particular Emitter-Wrap-Through (EWT). We perform 55 Ω/sq phosphorus diffusion to
getter metallic impurities and firing of silicon nitride (SiN) to induce hydrogen passivation. We analyse the bulk
passivation in four scenarios that can occur simultaneously in the wafer: (a) firing of gettered areas with emitter (b)
firing of gettered areas after removing the emitter, (c) firing of not gettered (not diffuse(d) areas and (d) firing with
single side side emitter diffusion. Scenario (a) enhances strongly the lifetime of the wafer bulk, whilst (b) and (d)
reduce it slightly. Scenario (c) produces strong degradation of the bulk lifetime.
title: Zum Einfluss von Adaptivität auf die Interaktion mit Bildungstechnologien
Creators: name: Moebert, Tobias
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Bildungstechnologien
subject: Adaptivität
subject: Interaktion
subject: Komplexität
subject: Analysewerkzeug

description: Verschiedenste sozio-technische Konstellationen finden momentan Einzug in unseren privaten, aber auch beruflichen Alltag. So wurde beispielsweise in den letzten 20 Jahren im Bereich der Bildungstechnologien vermehrt an adaptiven Lösungen geforscht. Ziel dieser Lehr-/Lernsysteme ist es, sich automatisch an die Bedürfnisse der Lernenden oder die Erfordernisse des Lehrszenarios anpassen. Eine Herausforderung ist dabei das Einbringen von Unvorhersehbarkeit in die Mensch-Computer-Interaktion. Als Folge wird die Interaktion mit solchen Systemen oft als komplex wahrgenommen. Ziel der in diesem Paper beschriebenen Arbeit war es, ein Modell und eine Herangehensweise zu entwickeln, die es ermöglichen, komplexitätsgebende Interaktionen zu identifizieren und den Einfluss von Adaptivität auf die Wahrnehmung von Komplexität herauszustellen. Für die Erprobung und Evaluation wurde die entworfene Heuristik an den Ergebnissen zweier Forschungsprojekte angewendet, die das Ziel hatten, adaptive bildungstechnologische Lösungen für unterschiedliche Problemstellungen zu entwickeln. Dadurch konnten Erkenntnisse gewonnen werden, die sich für den Einsatz von Adaptivität in Bildungstechnologien generalisieren lassen.
The Grunwald problem and approximation properties for homogeneous spaces
Creators: name: Demarche, Cyril
name: Arteche, Giancarlo Lucchini
name: Neftin, Danny
Publisher: name: arXiv
Year: 2015
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R34, 14M17, 14G05, 11E72

description: Given a group $G$ and a number field $K$, the Grunwald problem asks whether given field extensions of completions of $K$ at finitely many places can be approximated by a single field extension of $K$ with Galois group G. This can be viewed as the case of constant groups $G$ in the more general problem of determining for which $K$-groups $G$ the variety $\mathrm{SL}_n/G$ has weak approximation. We show that away from an explicit set of bad places both problems have an affirmative answer for iterated semidirect products with abelian kernel. Furthermore, we give counterexamples to both assertions at bad places. These turn out to be the first examples of transcendental Brauer-Manin obstructions to weak approximation for homogeneous spaces.
description: 18 pages. Final version. Accepted for publication in Annales de l'Institut Fourier
title: Botolution
Creators: name: Stalljohann, Patrick
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Akademische Programmierausbildung
subject: Bildungsplattform
subject: Programmierwettbewerb
subject: Game-Based Learning
subject: Softwarearchitektur

description: Vorhandene Online-Programmierplattformen bieten einen motivierenden Einstieg in die Programmierung für den privaten Bereich. Spezielle Aspekte der akademischen Programmierausbildung werden dabei nicht berücksichtigt. Die Entwicklung eines eigenen Programmierspieles für eine Lehrveranstaltung ist dahingegen mit viel Aufwand verbunden. Die Plattform Botolution soll die einfachere Bereitstellung und Verwendung neuer Programmierspiele unter Berücksichtigung akademischer Anforderungen ermöglichen. Dazu zählen z. B. die Zusammenarbeit in Teams oder die weitere Verwendung selbstgewählter Standardwerkzeuge der Softwareentwicklung.
title: An Improved E-Learning Tool for Parsing-as-Deduction
Creators: name: Westburg, Anika
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: computational linguistics
subject: e-Learning
subject: context-free grammar
subject: formal grammar
subject: parsing

description: This paper presents an extended version of the CL-Taskbox introduced at DELFI 2019. The e-learning tool for the so-called parsing-as-deduction approach has been expanded with the generation of random tasks of several difficulty levels. Additional to aiding the learner in solving the tasks by providing constant visual feedback, a new feature that allows to draw freehand directly on the page aims at teachers who use the tool for explanations.
The integration of angular velocity
Creators: name: Boyle, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A common problem in physics and engineering is determination of the orientation of an object given its angular velocity. When the direction of the angular velocity changes in time, this is a nontrivial problem involving coupled differential equations. Several possible approaches are examined, along with various improvements over previous efforts. These are then evaluated numerically by comparison to a complicated but analytically known rotation that is motivated by the important astrophysical problem of precessing black-hole binaries. It is shown that a straightforward solution directly using quaternions is most efficient and accurate, and that the norm of the quaternion is irrelevant. Integration of the generator of the rotation can also be made roughly as efficient as integration of the rotation. Both methods will typically be twice as efficient as naive vector- or matrix-based methods. Implementation by means of standard general-purpose numerical integrators is stable and efficient, so that such problems can be readily solved as part of a larger system of differential equations. Possible generalization to integration in other Lie groups is also discussed.
description: Final version in press with Advances in Applied Clifford Algebras
Ozone Based Chemical Oxide Growth for Crystalline Silicon Solar Cell Production
Creators: name: Wolke, K.
name: Gottschalk, C.
name: Moldovan, A.
name: Oltersdorf, A.
name: Angermann, H.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 839-842
description: Treatment of crystalline silicon solar cells with ozone dissolved in ultra pure water is a low cost
alternative to improve surface characteristics before and after emitter formation. The impact of dissolved ozone
treatment after texturing has been investigated with respect to interface state densities and the possibility of
improving the emitter formation with a low cost process enhancement. The chemically grown thin oxide improves
wetting capability without modification of other surface characteristics that can impact cell efficiency. It could be
shown that already low concentrations of ozone in UPW prior to phosphorus doping improves sheet resistance
uniformity on Cz-Si and multi-crystalline Si solar cells by 30-50%.
title: Lessons Learned in Transferring a Lecture on Virtual Reality into Immersive Virtual Reality
Creators: name: Deuchler, Jonas
name: Wölfel, Matthias
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Virtual Reality
subject: Education
subject: Immersive Learning

description: Immersive virtual reality offers novel approaches on live-teaching by challenging the idea of the physical classroom. Here we present our experiences and learnings from our work-in-progress on transferring a real-life lecture about immersive virtual reality to the medium itself, employing a custom-implemented social virtual reality application. We highlight how students benefit from virtual lectures through a higher form of student participation and individual customisation, employing learning frameworks in accordance with the specificities of virtual reality like experiential learning and game-based learning. In addition, we show how the custom virtual environment allows to exploit the pedagogic potential of virtual reality to a great extent by enabling to intervene and control a virtual classroom at a deeper level and to respond to evaluations quickly and in an iterative incremental way, especially in comparison to currently available public social virtual reality platforms.
Shock fluctuations for the Hammersley process
Creators: name: Pimentel, Leandro P. R.
name: de Souza, Marcio W. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider the Hammersley interacting particle system starting from a shock initial profile with densities $λ,ρ\in\mathbb{R}$ ($λ> ρ$). The microscopic shock is taken as the position of a second-class particle initially at the origin, and the main results are: a central limit theorem for the shock; the variance of the shock equals $2[λρ(λ- ρ)]^{-1}t + O(t^{2/3})$. By using the same method of proof, we also prove similar results for first-class particles.
description: Hammersley process, multi-class particles, shock fluctuations. Final version, accepted for publication in the Journal of Statistical Physics
title: Inside the Router: An interactive VR learning application to practice routing and network address translation
Creators: name: Leonhardt, Thiemo
name: Baberowski, David
name: Bergner, Nadine
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: VR
subject: VR learning model
subject: NAT
subject: Router
subject: Process Knowledge

description: This paper presents the evaluation of a VR learning application to practice routing and network address translation of a home router. The main didactical design feature of the application is the Inside the System approach, which lets the learners become part of the information system by performing the tasks themselves. Accordingly, process knowledge is to be built up and practiced and thus the competence level of Apply according to Krathwohl and Anderson is to be achieved by the learners. For comparability of evaluation results of VR learning apps, we introduced an evaluation design based on usability, VR specific design, and learning performance.
European Record Efficiency Amorphous-Crystalline-Silicon Heterojunction Solar Cells: Final Results from the HETSI Project
Creators: name: Ribeyron, P.-J.
name: Muñoz, D.
name: Kleider, J.-P.
name: Favre, W.
name: Roca I Cabarrocas, P.
name: Labrune, M.
name: Geerligs, B.
name: Weeber, A.
name: Späth, M.
name: Olson, C.
name: Dekker, N.
name: Van Sark, W.G.J.H.M.
name: Schüttauf, J.A.
name: Rath, J.K.
name: Schropp, R.E.I.
name: Tucci, M.
name: De Iuliis, S.
name: Gordon, I.
name: O’Sullivan, B.
name: Descoeudres, A.
name: De Wolf, S.
name: Ballif, C.
name: Schulze, T.
name: Korte, L.
name: Le Quang, N.
name: Scherff, M.
name: Doll, R.
name: Zemen, Y.
name: Zietek, G.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 853-857
description: In this work, we present some of the main results obtained within the project “Heterojunction Solar Cells based on a-Si/c-Si”
(HETSI) [1], funded by the European Commission in the framework of the 7th Research Framework Program from 2008 to
2011. This project, based on the promising silicon heterojunction technology, represents a concerted effort of the consortium,
a well balanced mix of universities, institutes of technology and industrial partners, to combine device modelling, material
optimization and characterization, process development (from texturization to metallization), PV cell and module process
integration, while cost and environmental issues are addressed as well.
Thanks to a better understanding of the device physics from advanced characterization tools and modeling, the results
obtained by this consortium have put Europe on the map, with a record cell efficiency of 20,7% on large area n-type c-Si
wafers. Moreover, a dedicated module process has been developed with low losses of only 1% absolute from cell to module.
Electronic structure of the ingredient planes of cuprate superconductor Bi2Sr2CuO6+δ: a comparison study with Bi2Sr2CaCu2O8+δ
Creators: name: Lv, Yan-Feng
name: Wang, Wen-Lin
name: Ding, Hao
name: Wang, Yang
name: Ding, Ying
name: Zhong, Ruidan
name: Schneeloch, John
name: Gu, G. D.
name: Wang, Lili
name: He, Ke
name: Ji, Shuai-Hua
name: Zhao, Lin
name: Zhou, Xing-Jiang
name: Song, Can-Li
name: Ma, Xu-Cun
name: Xue, Qi-Kun
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By means of low-temperature scanning tunneling microscopy, we report on the electronic structures of BiO and SrO planes of Bi2Sr2CuO6+δ (Bi-2201) superconductor prepared by argon-ion bombardment and annealing. Depending on post annealing conditions, the BiO planes exhibit either pseudogap (PG) with sharp coherence peaks and an anomalously large gap of 49 meV or van Hove singularity (VHS) near the Fermi level, while the SrO is always characteristic of a PG-like feature. This contrasts with Bi2Sr2CaCu2O8+δ (Bi-2212) superconductor where VHS occurs solely on the SrO plane. We disclose the interstitial oxygen dopants (δ in the formulas) as a primary cause for the occurrence of VHS, which are located dominantly around the BiO and SrO planes, respectively, in Bi-2201 and Bi-2212. This is supported by the contrasting structural buckling amplitude of BiO and SrO planes in the two superconductors. Our findings provide solid evidence for the irrelevance of PG to the superconductivity in the two superconductors, as well as insights into why Bi-2212 can achieve a higher superconducting transition temperature than Bi-2201, and by implication, the mechanism of cuprate superconductivity.
description: 5 pages, 4 figures
title: Do you trust the Bot? – Entwicklung und Evaluation eines Conversational Agents zur Klassifikation von Lernstilen
Creators: name: Khosrawi-Rad, Bijan
name: Grogorick, Linda
name: Keller, Paul
name: Schlimbach, Ricarda
name: Rinn, Heidi
name: Robra-Bissantz, Susanne
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Conversational Agent
subject: Virtual Companion
subject: Vertrauen
subject: Freundschaft
subject: Lernstil

description: Personalisiertes Lernen ermöglicht es Lernenden, nach ihren eigenen Lernpräferenzen und -stilen zu lernen. Conversational Agents (CAs) bieten eine vielversprechende Möglichkeit zur Unterstützung der Lernenden. CAs können Lernstile im Dialog mit den Nutzer:innen erkennen sowie passende Lern-Empfehlungen bereitstellen. Eine Herausforderung besteht jedoch darin, dass Lernende diese neuartige Technologie positiv wahrnehmen und ihr vertrauen. In diesem Beitrag wird die Entwicklung des CAs Vicky vorgestellt, welcher Lernstile anhand eines Fragebogens sowie eines Quiz ermittelt. Vicky verhält sich dabei menschenähnlich, um als virtueller Companion wahrgenommen zu werden. In einem Experiment wird untersucht, ob und inwiefern die Lernenden Vicky vertrauen und die Interaktion als freundschaftlich empfinden, sowie ob eine Variante der Lernstil-Erkennung bevorzugt wird. Insgesamt leistet der Artikel einen Beitrag zu Wissenschaft und Praxis, indem gezeigt wird, wie CAs zur Klassifikation von Lernstilen gestaltet werden sollten, damit diese ihr Potenzial entfalten.
General Theory of Spontaneous Emission Near Exceptional Points
Creators: name: Pick, Adi
name: Zhen, Bo
name: Miller, Owen D.
name: Hsu, Chia W.
name: Hernandez, Felipe
name: Rodriguez, Alejandro W.
name: Soljacic, Marin
name: Johnson, Steven G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a general theory of spontaneous emission at exceptional points (EPs)---exotic degeneracies in non-Hermitian systems. Our theory extends beyond spontaneous emission to any light--matter interaction described by the local density of states (e.g., absorption, thermal emission, and nonlinear frequency conversion). Whereas traditional spontaneous-emission theories imply infinite enhancement factors at EPs, we derive finite bounds on the enhancement, proving maximum enhancement of 4 in passive systems with second-order EPs and significantly larger enhancements (exceeding $400\times$) in gain-aided and higher-order EP systems. In contrast to non-degenerate resonances, EPs are associated with non-Lorentzian emission curves, leading to enhancements that scale polynomially with the resonance quality factor.
description: 15 pages, 7 figures
title: Mapping course text to hyperaudio
Creators: name: Seidel, Niels
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Hyperaudio
subject: Multimedia Learning
subject: Text to Speech

description: Informal knowledge transfer through podcasts, audiobooks, and radio documentaries enjoys great popularity. However, informal learning settings at schools or universities auditory learning resources are rarely used. This is due to the high cost of producing and updating auditory resources. Furthermore, some learning resources can hardly be presented auditorily. In this paper, we present an approach to convert rich-text course material from LaTeX or MS Word format into interactive hyperaudio documents. For text to speech (TTS) conversion, we make use of common TTS web services. Text-specific design is mapped to audible effects and enriched by time-based interactive visual material. In a dedicated Moodle plugin we provide a basic hyperaudio player to be used within a course or as a stand-alone web application. With this approach, existing course texts can be transferred into hyperaudio within minutes.