cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Yield and Spectral Effects of a-Si Modules
Creators: name: Grunow, P.
name: Preiss, A.
name: Koch, S.
name: Krauter, S.
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; 2846-2849
description: Aim of this study was to investigate the relevant factors that influence electrical energy yield of
photovoltaic modules based on thin film technologies, in particular amorphous silicon (a-Si). Models of different
manufacturers have been compared in theory and in the outdoor laboratory of TU-Berlin and PI-Berlin.
Amorphous silicon modules show higher energy yields for diffuse light irradiation. This was as well calculated –
using the spectral match of the diffuse irradiance (as given in the spectra of CIE 85) and the spectral response for
single junction a-Si modules – as confirmed via outdoor field measurements.
Highly diffuse skies and high sun elevation angles (AMs) result in the highest increase of short circuit current (and
electrical yield) for amorphous based modules relative crystalline silicon (c-Si) modules. For moderate diffuse skies
c-Si performs better. Although spectral effects have been successfully separated from other performance factors with
the result that their influence can be quite significant for some conditions (e.g., >30% gain in ISC at a-Si for a 90%
overcast sky at spectral matching), their overall contribution to the annual energy yield is relatively small: 1.3 % for
a tandem μ-morph, and 3.2% for single junction amorphous (a-Si) modules. Therefore, spectral effects alter
performance in about the same range as thermal and weak light performance factors.
Particular problems for yield evaluation of a-Si modules occur due to degradation of power output. In the outdoor lab
the effect of the annealing/degradation process on electrical performance has been investigated: Seasonal degradation
and recovery of the a-Si modules resulted in a fluctuation of ±6% of the short-circuit current Isc and of energy yield.
Accordingly, the effects of seasonal degradation (resp. recovery) are by a factor of two higher than the spectral
effects observed. Future efforts are targeted on the modeling of degradation and recovery of tandem cells.
21st ICOM General Conference
Creators: name: Feigl, Claudia
name: Knofler, Monika
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2008
Subjects: Austrian university museums and collections
University of Vienna
Academy of Fine Arts Vienna

description: The staging of the ICOM UMAC conference in Vienna has provided the impetus for a much-needed network of Austrian university museums and collections.
Spatial Concept Acquisition for a Mobile Robot that Integrates Self-Localization and Unsupervised Word Discovery from Spoken Sentences
Creators: name: Taniguchi, Akira
name: Taniguchi, Tadahiro
name: Inamura, Tetsunari
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this paper, we propose a novel unsupervised learning method for the lexical acquisition of words related to places visited by robots, from human continuous speech signals. We address the problem of learning novel words by a robot that has no prior knowledge of these words except for a primitive acoustic model. Further, we propose a method that allows a robot to effectively use the learned words and their meanings for self-localization tasks. The proposed method is nonparametric Bayesian spatial concept acquisition method (SpCoA) that integrates the generative model for self-localization and the unsupervised word segmentation in uttered sentences via latent variables related to the spatial concept. We implemented the proposed method SpCoA on SIGVerse, which is a simulation environment, and TurtleBot2, which is a mobile robot in a real environment. Further, we conducted experiments for evaluating the performance of SpCoA. The experimental results showed that SpCoA enabled the robot to acquire the names of places from speech sentences. They also revealed that the robot could effectively utilize the acquired spatial concepts and reduce the uncertainty in self-localization.
description: This paper was accepted in the IEEE Transactions on Cognitive and Developmental Systems. (04-May-2016)
title: On the Lack of Recognition of Software Artifacts and IT Infrastructure in Educational Technology Research
Creators: name: Kiesler, Natalie
name: Schiffner, Daniel
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Open Science
subject: FAIR principles
subject: epistemology
subject: technology-based research
subject: software
subject: research data management

description: In the context of educational technology research, it is common practice that computer scientists and IT specialists provide support in terms of software and infrastructure for data gathering and processing, storage, analysis and many other services. Ever since Big Data, Learning Analytics and machine learning algorithms have become increasingly feasible, the implementation of programs can be considered a cornerstone of today’s professional research. Contrary to this trend, software as a method for research is hardly recognized within the community, conferences and publication organs. The same applies to processed research data. Therefore, the authors question the current practices and lack of FAIRness related to the publication of software artifacts by discussing the challenges in terms of acknowledgements, review processes, reproducibility and reuse. The paper concludes with recommendations for future FAIR and Open Science practices.
Thin Film Silicon Solar Cells in a Semi-Transparent Micro-Structured Metal Substrate Configuration
Creators: name: Denizot, C.
name: Faÿ, S.
name: Bailat, J.
name: Ballif, C.
name: Jensen, S.
name: Johansson, A.
name: Lillemose, M.
name: Bezzel, E.
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; 2760-2762
description: We present our work on the combination of thin film silicon solar cells and a commercial window
shading device (MicroShadeTM, PhotoSolar) into a novel, glass integrated photovoltaic product for building
integration. The development of amorphous silicon solar cells (a-Si:H) on the MicroShadeTM substrates was carried
out following two simultaneous paths; First the deposition process for a-Si:H solar cells on this new perforated
substrate was investigated and modified in order to achieve higher efficiency devices; Then the authors tackled
adhesion and shunt issues that appeared on this new substrate. The deposition of solar cells on this semi-transparent
structure was demonstrated to be feasible and we fabricated solar cells with an initial efficiency of 5.86% for a cell
size of 450mm2.
Interface asymptotics of partial Bergman kernels on $S^1$-symmetric Kaehler manifolds
Creators: name: Zelditch, Steve
name: Zhou, Peng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: This article is concerned with asymptotics of equivariant Bergman kernels and partial Bergman kernels for polarized projective Kahler manifolds invariant under a Hamiltonian holomorphic $S^1$ action. Asymptotics of partial Bergman kernel are obtained in the allowed region $\mathcal{A}$ resp. forbidden region $\mathcal{F}$, generalizing results of Shiffman-Zelditch, Shiffman-Tate-Zelditch and Pokorny-Singer for toric Kahler manifolds. The main result gives scaling asymptotics of equivariant Bergman kernels and partial Bergman kernels in the transition region around the interface $\partial \mathcal{A}$, generalizing recent work of Ross-Singer on partial Bergman kernels, and refining the Ross-Singer transition asymptotics to apply to equivariant Bergman kernels.
description: v2: 34 pages. Added result on zero of random sections. Removed dependence of analyticity of the metric. Streamlined presentations
Private donations and the collecting legacy of Luis Simarro to the heritage of Complutense University of Madrid
Creators: name: Aguilar, María Del Pilar
name: Calvo, Irene
name: Méndez, María De Los Ángeles
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2012
Subjects: subject: university
subject: Simarro’s legacy
subject: conservation
subject: 060 Organisationen, Museumswissenschaft

description: One of the most important private donations in the Complutense University of Madrid is Luis Simarro's legacy. The Simarro Foundation was formed in 1927 with a collection of paintings by Simarro’s friends such as Sorolla, Berruete, Madrazo and prints by Dürer and Goya. In 1945 this legacy became part of the art collection of the General Foundation of Complutense University. Now its current location in the Faculty of Psychology does not fulfill all the requirements about conservation because it is not guarded by specialised staff. The management of university collections strongly depends on the general budget and Unidad Tecnica de Cultura is working in order to achieve a balance between human and material resources.
VHF PECVD Deposition of nc-Si – Material and Device Properties
Creators: name: Delahoy, A.E.
name: Liu, T.
name: Saraf, G.
name: Guo, S.
name: Delli Veneri, P.
name: Mercaldo, L.V.
name: Usatii, I.
name: Cambridge, J.A.
name: Kappera, R.
name: Stavrides, A.
name: Rodriguez, L.N.J
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; 2860-2866
description: Device-grade nanocrystalline silicon (nc-Si:H) has been prepared by a VHF (40.68 MHz) PECVD
process. Appropriate recipes for the production by VHF PECVD of component cells (a-Si:H top stack cell and nc-
Si:H bottom stack cell) suitable for tandem a-Si:H/nc-Si:H devices have been developed. The transport properties of
the relevant i-layers were deduced from device measurements. The VHF nc-Si:H deposition parameters have been
located in a phase diagram for thin Si:H growth. We have further started to link the spatial variation in plasma
composition, nc-Si:H properties, and device performance. Making use of a mature VHF PECVD process at 100
MHz, tandem a-Si:/nc-Si:H devices were prepared on textured TCO films of ZnO:Al produced by hollow cathode
(HC) sputtering. Using micro-Raman spectroscopy it was concluded that the 40.68 and 100 MHz processes produced
nc-Si:H material having similar properties. For the 100 MHz devices, a peak in device efficiency was obtained at a
crystalline volume fraction of 50-52 %. Device efficiencies were 9.9% on HC ZnO and 11.3% on a reference Type-U
SnO2 substrate.
title: Ein Konzept zur Unterstützung der Entwicklung von Virtual Reality Lernszenarien durch die Einbindung von Learning Analytics und Open Educational Resources
Creators: name: Görzen, Sergej
name: Heinemann, Birte
name: Schroeder, Ulrik
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Virtual Reality
subject: WebXR
subject: Learning Analytics
subject: Open Educational Resources

description: Vielfältige Anforderungen aus unterschiedlichen Disziplinen machen die Gestaltung von Lernszenarien in Virtual Reality (VR) zu einer komplexen Aufgabe. Die Komplexität setzt sich zusammen aus einer Verbindung von technologischen Herausforderungen, didaktischem Design, Anforderungen der Stakeholder und freier und offener Bildungsmaterialien. Dieser Beitrag präsentiert ein Lösungskonzept für die technischen Herausforderungen dieser Aufgabe. Dieses betrachtet Komponenten eines VR-Szenarios als Open Educational Resources (OER), die eine direkte Integration von Learning Analytics (LA) unterstützen sollen. Das Ziel dieses Vorhabens ist die iterative Erstellung eines Frameworks zur Entwicklung erweiterbarer und wiederverwendbarer VR-Lernmodule, die unter anderem eine automatisierte Lerndatensammlung ermöglichen und in Learning Management Systemen (LMS) als WebXR-Lerneinheiten integriert werden können.
Supplementary document for On the use of a consumer-grade 360-degree camera as a radiometer for scientific applications - 7152786.pdf
Creators: name: Larouche, Raphael
name: Girard, Simon Lambert
name: Katlein, Christian
name: Marty, Sabine
name: Leymarie, Edouard
name: Thibault, Simon
name: Babin, Marcel
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Calibration and real-world validation supplements
title: Organisation von Gitlab-Projekten zur optimierten Betreuung von Programmierpraktika in der Online- und Hybrid-Lehre
Creators: name: Winter, Julian
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: E-Learning
subject: Werkzeuge
subject: Programmierpraktika
subject: Organisation
subject: Stapelverarbeitung

description: Je höher die Zahl an Studierenden, desto höher der Organisationsaufwand für Praktikumsgruppen in der akademischen Programmierausbildung. Insbesondere bei einer notwendigen Online-Durchführung von Programmierpraktika ist eine effiziente und effektive Organisation ohne geeignete Werkzeuge kaum möglich. Zu diesem Zweck wurde eine Webanwendungen entwickelt, die die Organisation, Überwachung und Übersicht studentischer Gitlab-Projekte erleichtert. Erfahrungen bei der Steuerung von hundert Git-Repositories in einem Modul mit starkem Programmier-Fokus während der Pandemie führen nun zum weiteren Einsatz in der Hybrid- und Präsenz-Lehre.
Topological Order and Memory Time in Marginally Self-Correcting Quantum Memory
Creators: name: Siva, Karthik
name: Yoshida, Beni
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We examine two proposals for marginally self-correcting quantum memory, the cubic code by Haah and the welded code by Michnicki. In particular, we prove explicitly that they are absent of topological order above zero temperature, as their Gibbs ensembles can be prepared via a short-depth quantum circuit from classical ensembles. Our proof technique naturally gives rise to the notion of free energy associated with excitations. Further, we develop a framework for an ergodic decomposition of Davies generators in CSS codes which enables formal reduction to simpler classical memory problems. We then show that memory time in the welded code is doubly exponential in inverse temperature via the Peierls argument. These results introduce further connections between thermal topological order and self-correction from the viewpoint of free energy and quantum circuit depth.
description: 19 pages, 18 figures
title: Kompetenzen für Künstliche Intelligenz (KI) in kleinen und mittleren Unternehmen (KMU) aufbauen
Creators: name: Schliephake, Judith
name: Hilgert, Barbara
name: Heinen, Andreas
name: Cordes, Anja
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Künstliche Intelligenz
subject: Qualifizierung
subject: KMU
subject: E-Learning
subject: Lehr-Lern-Setting

description: Damit kleine und mittelständische Unternehmen (KMU) die mannigfaltigen Möglichkeiten, die Künstliche Intelligenz (KI) bietet, sicher und präventiv nutzen können, bedarf es an Kompetenzen. Der Beitrag zeigt, wie eine KI-Qualifizierung für KMU gestaltet werden kann.
Spectral properties of four-time fermionic Green's functions
Creators: name: Shvaika, A. M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences
subject: 82B10

description: The spectral relations for the four-time fermionic Green's functions are derived in the most general case. The terms which correspond to the zero-frequency anomalies, known before only for the bosonic Green's functions, are separated and their connection with the second cumulants of the Boltzmann distribution function is elucidated. The high-frequency expansions of the four-time fermionic Green's functions are provided for different directions in the frequency space.
description: 14 pages
Use of Phase Change Materials in Photovoltaic Modules with Solar Concentration Up to 2X
Creators: name: Lillo Bravo, I.
name: Silva Pérez, M.
name: Larrañeta Gómez-Caminero, M.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 634-639
description: Module efficiency depends of the irradiance level and its temperature. Module temperature depends of
ambient temperature, irradiance, thermal characteristic of the module, surrounding of the module, and the direction
and wind speed. A silicon photovoltaic module improves its efficiency when decreasing its temperature about
0,5%/K.
The purpose of this paper is to analyze the possibilities of using phase change materials PCM, to limit the
temperature of photovoltaic modules without concentration and with concentration up to 2X and thus increase its
performance. We carry out a theoretical study that discusses this potential improvement in different climatic zones
characterized by 12 sites. The results show that the use of PCM is a technically feasible alternative to limit the
temperature of a photovoltaic module in some climates.
Panel Maximizer and Microinverter: Performances Optimization and Additional Features for Maintenance Purpose
Creators: name: Cincinelli, L.
name: Mosa, W.
name: Piazzesi, M.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3690-3693
description: In the next years the deployment of PV installations on residential buildings will gain more
popularity and the issue of PV energy lost because of shadows on some panels of a string will be more important.
MPPT of the inverters currently available on the market, provide to detect and track a local or absolute maximum
power point of a string of panels but the resulting voltage and current working point is an average of panel’s
irradiance conditions which is unsatisfactory if the irradiance conditions among modules differs because of local
shadows due to the presence of poles, dormers, debris etc. Microinverter and panel optimizer are located on each
single module, therefore they can have the capability of discriminating the maximum power point of each module
, thus harvesting maximum energy available. These two products can also provide to collect detailed working
condition of every module of an array. While providing optimization of performances at panel’s level,
information about voltage, current, power is then collected from every module and this data can be used for
maintenance as well for systems performance’s optimization purpose.
title: Escola de Desenho Industrial de Coimbra
Creators: name: de Almeida Barata, João
Publisher: name: CHAM, Faculdade de Ciências Sociais e Humanas, Universidade Nova de Lisboa
Year: 2022

description: Entrada histórica sobre a instituição Escola de Desenho Industrial de Coimbra, Coimbra, Portugal, na plataforma eViterbo
description: Almeida Barata, João de .2022. Escola de Desenho Industrial de Coimbra in eViterbo. CHAM, Faculdade de Ciências Sociais e Humanas, Universidade Nova de Lisboa. eISBN: 978-989-8492-77-7
In-Field Performances of First Commercial Rondine® PV Concentrators
Creators: name: Antonini, A.
name: Butturi, M.A.
name: Di Benedetto, P.
name: Zurru, P.
name: Sartore, D.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 640-643
description: Rondine® photovoltaic concentrators have started in 2011 the commercial phase; the product is a 20x
reflective CPV module, which can be mounted on 2-axis tracker with angular accuracy up to ±4°; this allows to
mount these modules on many trackers for standard PV modules without significant power losses. Moreover, the
high angular acceptance permits to collect high fraction of the circumsolar light impinging the module frontal
aperture, giving high efficiency on DNI during in-field operative conditions. The Rondine modules have been tested
following the IEC standard procedures for CPV in order to get the certification of quality of the product.
title: COMMENT L’HISTOIRE DE LA MÉDECINE THERMALE À VICHY A CONDUIT À SON INSCRIPTION AU PATRIMOINE MONDIAL DE L’UNESCO
title: HOW THE HISTORY OF SPA MEDICINE IN VICHY LED TO ITS INSCRIPTION IN THE UNESCO WORLD HERITAGE LIST
Creators: name: Bignon, Yves-Jean
Publisher: name: Société française de médecine thermale
Year: 2022

description: Aussi la médecine thermale a-t-elle une valeur à la fois universelle à travers les siècles et exceptionnelle par plusieurs spécificités que nous développerons dans notre propos à travers l’exemple de l’histoire de Vichy. C’est cette valeur universelle exceptionnelle qui a guidé le projet de proposer à l’Unesco une candidature transnationale en série pour une inscription au patrimoine mondial de l’humanité sous la bannière du “Great Spa Towns of Europe” (Gste) ou “les Grandes villes d’eaux d’Europe” qui s’est concrétisée le 24 juillet 2021. Le Gste associe les villes de Bad Ems, Bad Kissingen, Baden-Baden (Allemagne), Bath (Angleterre), Baden bei Wien (Autriche), Spa (Belgique), Montecatini Terme (Italie), Karlovi Vary, Mariánské Lázně, Františkovi Lázně (République Tchèque) et Vichy pour la France. Cet article reprend en grande partie celui publié dans le bulletin de la SHAVE en 2021 [3].
Scaling laws in earthquake occurrence: Disorder, viscosity, and finite size effects in Olami-Feder-Christensen models
Creators: name: Landes, François P.
name: Lippiello, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The relation between seismic moment and fractured area is crucial to earthquake hazard analysis. Experimental catalogs show multiple scaling behaviors, with some controversy concerning the exponent value in the large earthquake regime. Here, we show that the original Olami, Feder, and Christensen model does not capture experimental findings. Taking into account heterogeneous friction, the visco elastic nature of faults together with finite-size effects, we are able to reproduce the different scaling regimes of field observations. We provide an explanation for the origin of the two crossovers between scaling regimes, which are shown to be controlled both by the geometry and the bulk dynamics.
description: 6 pages, 6 figures
title: Data Leakage Through Click Data in Virtual Learning Environments
Creators: name: Hartmann, Johanna
name: Heuer, Hendrik
name: Breiter, Andreas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: learning analytics
subject: machine learning
subject: algorithmic bias
subject: clustering
subject: student performance

description: Unsupervised machine learning techniques are increasingly used to cluster students based on their activity in virtual learning environments. It is commonly assumed that clusters formed by click data merely represent the actions of users and do not allow inferring personal information about individual users. Based on an analysis of 18,660 students and 5.56 million data points from the Open University Learning Analytics Dataset, we show that clusters trained on "raw" click data are highly correlated with personal information like student success, course specifics, and student demographics. Our analysis demonstrates that these clusters allow conclusions about demographic variables like the previous education and the affluence of the residential area. Our investigation shows that apparently, objective click data can leak private attributes. The paper discusses the implications of this for the design of virtual learning environments, especially considering the legal requirements posed by the principle of data minimization of the EU GDPR.
title: Modellierung von Lernprozessen für Augmented-Reality-Brillen in der technischen Aus- und Weiterbildung
Creators: name: Berg, Matthias
name: Dreesbach, Tobias
name: Bonaventura, Katharina
name: Knopf, Julia
name: Thomas, Oliver
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Augmented Reality
subject: Lernprozesse
subject: Modellierung
subject: Ausbildung

description: Augmented Reality bietet die Möglichkeit interaktive Lernerfahrungen zu schaffen und wird bei Anlernprozessen oder zur Unterstützung situierter Lernszenarien vermehrt eingesetzt. Häufig besteht jedoch nicht die Möglichkeit, auf die Gegebenheiten zugeschnittene Lernprozesse zu erstellen. In diesem Beitrag wird eine Modellierungsumgebung vorgestellt, mit der Lernprozesse digitalisiert und mit Augmented Reality-Lernelementen erweitert werden können.
title: Analyse des persönlichen Burnout-Niveaus von Studierenden während des digitalen Semesters
Creators: name: Stemme, Jonas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Burnout
subject: digitale Lehre
subject: Längsschnittstudie
subject: Studierende
subject: COVID-19

description: In der nachfolgenden Panelstudie werden in einem induktiven Verfahren mithilfe von Interviews Belastungsfaktoren identifiziert, die Studierende (Erst- und Drittsemester) im digitalen Semester als besonders belastend empfunden haben. Insgesamt konnten sechs Dimensionen festgestellt werden, die in drei quantitativen Erhebungen weiter analysiert wurden. Zusätzlich wurde das persönliche Burnout-Niveau bei beiden Gruppen von Studierenden zu drei Zeitpunkten gemessen, um Veränderungen zu erkennen. Zusammenfassend lässt sich bei den Belastungsfaktoren feststellen, dass diese stark mit dem persönlichen Burnout-Niveau korrelieren. Zudem konnte zum Zeitpunkt Z3 bei beiden Gruppen ein höheres persönliches Burnout-Niveau als zum Zeitpunkt Z1 festgestellt werden.
title: Adaptive Learning as a Service – A concept to extend digital learning platforms?
Creators: name: Rzepka, Nathalie
name: Simbeck, Katharina
name: Müller, Hans-Georg
name: Pinkwart, Niels
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Adaptive Learning
subject: Microservice
subject: Software-Architecture

description: Adaptive learning environments that adjust to the individual user are promising. Unfortunately, many digital learning environments are not yet adaptive and the transformation of legacy software to an adaptive learning environment is complex and costly. Our work introduces the concept of adaptive learning as a service and discusses potential benefits as well as challenges.
title: Innovative, digitale Lehr-/Lernsettings mit Design Based Implementation Research entwickeln: Vorgehensweise und erste Erfahrungen
Creators: name: Brandt, Klaas
name: Scorna, Ulrike
name: Voß, Gunnar
name: Hajji, Rahim
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: DBIR
subject: Digitalisierung
subject: Evaluation
subject: Kompetenz
subject: Lehren
subject: Lernen
subject: Partizipation

description: Der (pandemiebedingte) Digitalisierungsdruck führt zu Innovation von Lehre und Lernen. Mittels des Design Based Implementation Research-Ansatzes (DBIR) werden innovative Lehr-/Lernangebote partizipativ und iterativ entwickelt, beforscht und implementiert. An der Hochschule Magdeburg-Stendal wird der DBIR-Ansatz aktuell in den Projekten H2D2 und ZAKKI angewandt. Die Zusammenarbeit von Evaluations- und Entwicklungsteams wird anhand von fünf Phasen partizipativ gestaltet. Ausgehend von der bereits abgeschlossenen Kennenlernphase diskutiert der Beitrag die sich daraus ergebenden grundlegenden Gestaltungsprinzipien einer DBIR-basierenden partizipativen Zusammenarbeit.
Badly approximable vectors and fractals defined by conformal dynamical systems
Creators: name: Das, Tushar
name: Fishman, Lior
name: Simmons, David
name: Urbański, Mariusz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We prove that if $J$ is the limit set of an irreducible conformal iterated function system (with either finite or countably infinite alphabet), then the badly approximable vectors form a set of full Hausdorff dimension in $J$. The same is true if $J$ is the radial Julia set of an irreducible meromorphic function (either rational or transcendental). The method of proof is to find subsets of $J$ that support absolutely friendly and Ahlfors regular measures of large dimension. In the appendix to this paper, we answer a question of Broderick, Kleinbock, Reich, Weiss, and the second-named author ('12) by showing that every hyperplane diffuse set supports an absolutely decaying measure.
Energy Modeling of a Single Axis Tracked String PV System from a Hybrid RES
Creators: name: Moldovan, M.
name: Visa, I.
name: Burduhos, B.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3804-3807
description: The constraints generated by the conditions of implementation, mainly related to the available roof's
surface and orientation, the high price of photovoltaic modules and the auto shading, are the most important aspects
in a designing process of a photovoltaic system. Solar tracking technologies can improve the amount of energy yield.
There are two basic types of tracking systems for solar conversion systems: astronomically guided systems and
“intelligent” systems that detect the brightest point in the sky, technologies which can harvest up to 46% more solar
energy than fixed systems. Both systems ensure the precise alignment of the photovoltaic modules with the direction
of incident solar radiation and the value mentioned above refers to solar tracking systems with two axes. For large
photovoltaic systems, the complexity of the structure and the number of driving elements are sensible subjects of
cost-optimal studies. In this paper, a single axis solar tracking systems based on astronomically programs are studied.
Numerical simulations of the monoaxial orientation programs are made for laws of motion differentiated upon the
number of steps that have to do the actuation mechanism of the strings arrangement of photovoltaic modules. As
results, the optimized number and displacement of photovoltaic modules, and the motion law for the solar tracking
system are established in order to reach a maximum efficiency of solar radiation yield. The generated power is
intended to be used in an existing Hybrid RES of a "Solar House" to ensure the Nearly Zero Energy Building status for it.
Light-cone gauge superstring field theory in linear dilaton background
Creators: name: Ishibashi, Nobuyuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Feynman amplitudes of light-cone gauge superstring field theory suffer from various divergences. In order to regularize them, we study the theory in linear dilaton background $Φ=-iQX^1$ with the number of spacetime dimensions fixed. We show that the theory with the Feynman $i\varepsilon\,(\varepsilon>0)$ and $Q^{2}>10$ yields finite results.
description: 39 pages, 22 figures, minor corrections
title: Die Sanierung einer denkmalgeschützten Villa als Berufsbildungsprojekt im Rahmen einer virtuellen Lernumgebung
Creators: name: Zopff, Andreas
name: Kuhlmeier, Werner
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Virtuelle Lernumgebung
subject: Berufsbildung für nachhaltige Entwicklung (BBNE)
subject: Denkmalschutz
subject: Gewerke übergreifendes Arbeiten
subject: Design-Based-Research
subject: Baukörper als Lehrkörper

description: Im vorliegenden Beitrag werden die ersten Erkenntnisse aus dem Forschungs- und Entwicklungsprojekt „Gewerke übergreifende Qualifizierung im Rahmen energetischer Gebäudesanierung“ (GESA) vorgestellt. Im Zentrum stehen Ergebnisse, die während der Entwicklung, Erprobung und Evaluierung einer virtuellen Lernumgebung für Lernende in der Berufsbildung unter der gemeinsamen Berücksichtigung von Berufsbildung für nachhaltige Entwicklung (BBNE), Gewerke übergreifender Qualifizierung und Denkmalschutz erzielt wurden. Die didaktisch-methodischen Grundlagen werden skizziert und erste Ergebnisse der Forschungsarbeit vorgestellt.
Data Analysis in High-Energy Physics as a Differentiable Program
Creators: name: Simpson, Nathan
Publisher: name: Zenodo
Year: 2023
Subjects: differentiable programming
machine learning
high-energy physics
particle physics
neural networks
uncertainty-aware learning

description: Machine learning methods are now ubiquitous in physics, but often target objectives that are one or two steps removed from our physics goals. A prominent example of this is the discrimination between signal and background processes, which doesn’t account for the presence of systematic uncertainties – something crucial for the calculation of quantities such as the discovery significance and upper limits. To combat this, this thesis shows that physics analysis workflows can be optimized in an end-to-end fashion, including the treatment of nuisance parameters that model systematic uncertainties, provided that the workflow is differentiable. By leveraging automatic differentiation and surrogates for non-differentiable operations, this work has made this possible for the first time, and demonstrates its use in a proof-of-concept scenario. This thesis will motivate the use of end-to-end optimization as described above, cover the techniques that make it possible, and show recent developments in a high-energy physics context. Future directions that aim to scale and apply these methods will also be highlighted. In addition to this, a method to interpolate between the signatures of new physics models is presented, which uses normalizing flows. The thesis then goes on to show the use of the technique in a search for a new scalar boson 𝑆 produced in association with a Higgs boson from a heavy new scalar 𝑋. There are also some contributions that interpolate between the event yields with Gaussian processes, and that show how we can use normalizing flows to construct a likelihood ratio-inspired observable.
description: Web version exists at https://phinate.github.io/thesis
High Performance Amorphous-Microcrystalline Si Tandem Solar Cells and Modules Fabricated on Next-Generation TCO Glass Using Large-Area PECVD Cluster Systems
Creators: name: Sheng, S.
name: Chae, Y.K.
name: Yang, X.
name: Su, J.
name: Wang, D.
name: Tanner, D.
name: Eberspacher, C.
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; 2850-2853
description: We report on the next generation thin film solar process development of a-Si:H/μc-Si:H tandem junction (TJ)
solar cells and modules fabricated on low-cost, commercial TCO (ZnO and SnO2) glass, using proprietary, field proven largescale
AKTÒ RF-PECVD cluster tools. Excellent large-area uniformity of thickness, microstructure and crystallinity of device
quality thin film silicon materials has been demonstrated. A-Si:H/μc-Si:H TJ device design and process synthesis were
performed on ZnO and SnO2 based on their distinct surface morphology/texture and electrical/optical properties. Enhanced μc-
Si:H bottom cell current density of ~0.5-1 mA/cm2 was achieved on highly textured ZnO. A-Si:H top cell current density was
also improved by ~0.5-1.5 mA/cm2 by modifying/developing the TJ cell stack. A-Si:H/μc-Si:H TJ cells with 11-12.3% initial
efficiencies have been obtained on both ZnO and SnO2. Moreover, a-Si:H/μc-Si:H TJ modules (30cm×30cm) with >11%
initial and 10% stabilized efficiencies were demonstrated.
Kontrastmittel-Videodensitometrie und automatisierte Mikroskop-Bildanalyse zur Messung der Durchblutung und Vaskularisation von Mammakarzinomen
Creators: name: Blohmer, Jens-Uwe
Publisher: name: Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité
Year: 2000
Subjects: subject: Mammakarzinom
subject: Vaskularisation
subject: Durchblutung
subject: Videodensitometrie
subject: Breast cancer
subject: blood flow
subject: vascularisation
subject: videodensitometry
subject: 610 Medizin
subject: 33 Medizin
subject: XH 8450

description: Es wurde überprüft, ob sich Zusammenhänge zwischen der Tumordurchblutung und Vaskularisation nachweisen lassen, ob Unterschiede in der Durchblutung zwischen malignen und benignen Herdbefunden der Brust gemessen werden können, ob sich aus der Tumordurchblutung und Vaskularisation Aussagen zur Prognose der Patientin ableiten lassen und ob sich die Durchblutung und Vaskularisation unter der präoperativen Chemotherapie bei Mammakarzinomen ändert. Die CD war im direkten Vergleich nicht der Mammographie und der konventionellen B-Bild-Mammasonograpie überlegen. Mit verschiedenen Parametern der Kontrastmittel-Videodensitometrie, wie die Zeiten bis zum maximalen Signalanstieg (Tmax) mit dem Kontrastmittel Levovist(, konnte mit einer Spezifität von bis zu 92% sicher zwischen benignen und malignen Herdbefunden unterschieden werden. Mit der Videodensitometrie war es im Gegensatz zum konventionellen CD möglich, Veränderungen der Durchblutung von Mammakarzinomen unter einer präoperativen Chemotherapie durch die Änderung der Kontrastmittelkinetik zu erkennen. Bei den kleinlumigen Gefäßen korrelierten gefäßmorphologische Parametern mit den klassischen Prognoseparametern (Lymphknotenstatus) und der Durchblutung. Selbst unter einer effektiven Chemotherapie, die auch zu einer histologischen Regression geführt hat, veränderten sich die Vaskularisationsparameter nicht signifikant.
description: Various qualitative and semi-quantitative blood flow and vascularisation parameters were analyzed for their value in the fields of differential diagnosis, evaluation of prognosis, and of monitoring over the time of preoperative chemotherapy. Color Doppler sonography was not superior to other diagnostic methods for preoperative and prognostic assessment of a breast lesion. In contrast agent videodensitometry the values for Tmax were significantly higher for benign breast than for breast cancer. The combination of contrast agent and subsequent video-densitometry would be able to increase the specificity (92% in this investigation) of the diagnosis of breast cancer. Color Doppler can be used to image the blood supply in the smaller blood vessels. The vascularization and the blood flow of a breast carcinoma permits conclusions to be drawn as to the metastatic lymph-node status of a patient. There were only minimal changes of vascularisation visible even in patients with histological regression of breast cancer after preoperative chemotherapy.
title: Piloteinsatz einer E-Assessment-Plattform für die grafische Modellierung
Creators: name: Ullrich, Meike
name: Pfeiffer, Peter
name: Schiefer, Gunther
name: Soyka, Chantal
name: Stottrop, Tobias
name: Striewe, Michael
name: Fettke, Peter
name: Loos, Peter
name: Oberweis, Andreas
name: Schaper, Niclas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: E-Assessment
subject: Modellierung
subject: UML
subject: BPMN
subject: EPK
subject: Petri-Netze

description: Die KEA-Mod-Plattform ermöglicht es, Modellierungsaufgaben mit verschiedenen Modellierungssprachen wie z.B. UML, Petri-Netzen, EPK oder BPMN durch Dozierende zu erstellen und von Studierenden bearbeiten zu lassen. Die Plattform kam in einer großen Lehrveranstaltung mit ca. 250 Studierenden zum Piloteinsatz. Die Studierenden konnten mit Hilfe der Plattform und des integrierten Modellierungswerkzeugs eine Aufgabenreihe mit Modellierungsaufgaben zu Petri-Netzen bearbeiten und einreichen. Anschließend erhielten die Studierenden automatisiert generiertes Feedback. Das Poster beschreibt die Evaluation dieses Piloteinsatzes aus der Perspektive der Studierenden und bietet erste Ergebnisse in Bezug auf die Plattform-Usability und zur wahrgenommenen Lernförderlichkeit des Feedbacks.
Noise threshold and resource cost of fault-tolerant quantum computing with Majorana fermions in hybrid systems
Creators: name: Li, Ying
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Fault-tolerant quantum computing in systems composed of both Majorana fermions and topologically unprotected quantum systems, e.g. superconducting circuits or quantum dots, is studied in this paper. Errors caused by topologically unprotected quantum systems need to be corrected with error correction schemes, for instance, the surface code. We find that the error-correction performance of such a hybrid topological quantum computer is not superior to a normal quantum computer unless the topological charge of Majorana fermions is insusceptible to noise. If errors changing the topological charge are rare, the fault-tolerance threshold is much higher than the threshold of a normal quantum computer, and a surface-code logical qubit could be encoded in only tens of topological qubits instead of about a thousand normal qubits.
description: 15 pages, 11 figures
Power Subsystem Simulation for SAOCOM Mission
Creators: name: Godfrin, E.M.
name: Rodríguez, S.E.
name: Duran, J.C.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Solar Cells, Modules and PV Systems for Space Applications

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 789-794
description: The CNEA’s Solar Energy Department (DES) is responsible for the development of the solar arrays for
SAOCOM project. This project is being developed by the National Commission for Space Activities (CONAE) in the
frame of the Argentine National Space Plan. It consists of an Earth observation system to be applied to the optimization
of socio-economical activities and scientific studies. The solar arrays for SAOCOM satellites will have an area of
approximately 13 m2 employing advanced triple junction solar cells (ATJ) from Emcore Photovoltaics. The main
instrument of the satellite will be a Synthetic Aperture Radar antenna (SAR), operating in the L band of the microwave
range. Due to the very high power consumption of the SAR instrument, the design of the power subsystem is critical and
the study of different scenarios is required. Solar array power estimations for cold and hot conditions have been
performed. Power subsystem simulations for different battery configurations and several SAR measurement scenarios
have been also carried out. These simulations let to define allowed scenarios, to estimate the battery state of charge
(SOC) limits in the worst case and to verify that the requirements of the mission are satisfied with the proposed
configuration.
title: Automated feedback on teamwork in programming courses
Creators: name: Karl, Maximilian
name: Zender, Raphael
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: automated feedback
subject: learning analytics
subject: collaboration
subject: teamwork
subject: Git
subject: GitLab
subject: GitHub

description: In programming courses students might work asynchronous in a team to solve tasks from the tutor. A version control system (VCS) is commonly used by programming teams and the currently most popular VCS is Git. GitHub and GitLab are tools which are based on Git and supply additional features for teams to support their teamwork. This poster shows characteristics of collaborative teams and how they are reflected in GitHub and GitLab issue history. A learning analytics algorithm can analyse the issue history of GitHub or GitLab to distinguish teams by their teamwork and give an individual feedback for each team and team member. The feedback should encourage the team members to work more collaborative and use different features of GitHub or GitLab. The goal of the poster is to illustrate the possibilities of an automated feedback to enhance the teamwork of student teams which are using a VCS for their coding tasks.
Topological M-Strings and Supergroup WZW Models
Creators: name: Okazaki, Tadashi
name: Smith, Douglas J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the boundary conditions in the topologically twisted Chern-Simons matter theories with the Lie 3-algebraic structure. We find that the supersymmetric boundary conditions and the gauge invariant boundary conditions can be unified as the complexified gauge invariant boundary conditions which lead to the supergroup WZW models. We propose that the low-energy effective field theories on the two-dimensional intersection of multiple M2-branes on a holomorphic curve inside K3 with two non-parallel M5-branes on the K3 are supergroup WZW models from the topologically twisted BLG-model and the ABJM-model.
description: 36 pages, 2 figures; v4: published version in Physical Review D
Hydrogenated Nanocrystalline Silicon Deposited by Hot Wirechemical Vapour Deposition at High Rate
Creators: name: Li, H.B.T.
name: Jongen, J.P.H.
name: Van Der Werf, K.H.M.
name: Hebbink, M.
name: Schropp, R.E.I.
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; 2856-2859
description: In this contribution we summarize our recent investigations on the deposition of nc-Si:H materials at a
deposition rate in excess of 1.0 nm/s. Techniques to characterize the material quality include structural, optical and
electrical characterization methods such as Raman spectroscopy, Fourier Transform Infrared spectroscopy,
Reflection/Transmission, electronic activation energy and conductivity measurements. Sub-bandgap defects are
characterized by means of Constant Photocurrent Method and Photothermal Deflection Spectroscopy. It is shown
that at an adequately raised substrate temperature, nc-Si:H materials with good photoresponse can be produced at a
rate beyond 1.0 nm/s. Particularly, the reverse H2 profiling technique developed earlier for low-rate nc-Si:H material
deposited near the a-Si:H to nc-Si:H phase transition can also be applied to this high rate material. This warrants a
homogeneous structure in the growth direction. The results of the present research can be well implemented in to an
in-line deposition facility, which involves a continuously moving substrate.
title: Kompetenzorientiertes digitales Prüfen am Beispiel der Wirtschaftswissenschaften
Creators: name: Sauer, Marc
name: Froitzheim, Manuel
name: Schuhen, Michael
name: Hoffmann, Andreas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2022
Subjects: subject: Kompetenzorientiertes Prüfen
subject: Domänenspezifische Aufgaben
subject: Wirtschaftswissenschaften
subject: interaktive Aufgaben
subject: digitale Prüfungen

description: Wer kompetenzorientiert lehrt, sollte auch kompetenzorientiert prüfen, möchte er valide Prüfungsergebnisse erzielen. Dieses im Constructive Alignment formulierte Selbstverständnis wird jedoch häufig nicht umgesetzt, da papierbasierte Prüfungen gewissen Limitationen unterliegen und E-Prüfungsplattformen bisher wenig auf die im Fach vorhandene Lehr-Lernkultur und damit verbundene Prüfungskultur eingehen.