TY - JOUR
AB - A stepwise angular spectrum method (SASM) for curved interfaces is presented to calculate the wave propagation in planar lens-like integrated optical structures based on photonic slab waveguides. The method is derived and illustrated for an effective 2D setup first and then for 3D slab waveguide lenses. We employ slab waveguides of different thicknesses connected by curved surfaces to realize a lens-like structure. To simulate the wave propagation in 3D including reflection and scattering losses, the stepwise angular spectrum method is combined with full vectorial finite element computations for subproblems with lower complexity. Our SASM results show excellent agreement with rigorous numerical simulations of the full structures with a substantially lower computational effort and can be utilized for the simulation-based design and optimization of complex and large scale setups.
AU - Ebers, Lena
AU - Hammer, Manfred
AU - Förstner, Jens
ID - 20372
IS - 24
JF - Optics Express
KW - tet_topic_waveguides
SN - 1094-4087
TI - Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method
VL - 28
ER -
TY - CONF
AU - Ahmed Sherif, Mohamed
AU - Dreßler, Kevin
AU - Ngonga Ngomo, Axel-Cyrille
ED - Shvaiko, Pavel
ED - Euzenat, Jérôme
ED - Jimenez-Ruiz, Ernesto
ED - Hassanzadeh, Oktie
ED - Trojahn, Cássia
ID - 25340
T2 - Proceedings of the 15th International Workshop on Ontology Matching co-located with the 19th International Semantic Web Conference {(ISWC} 2020), Virtual conference (originally planned to be in Athens, Greece), November 2, 2020
TI - LIGON - link discovery with noisy oracles
VL - 2788
ER -
TY - CONF
AB - Link discovery plays a key role in the integration and use of data across RDF knowledge graphs. Active learning approaches are a common family of solutions to address the problem of learning how to compute links from users. So far, only active learning from perfect oracles has been considered in the literature. However, real oracles are often far from perfect (e.g., in crowdsourcing). We hence study the problem of learning how to compute links across knowledge graphs from noisy oracles, i.e., oracles that are not guaranteed to return correct classification results. We present a novel approach for link discovery based on a probabilistic model, with which we estimate the joint odds of the oracles’ guesses. We combine this approach with an iterative learning approach based on refinements. The resulting method, Ligon, is evaluated on 10 benchmark datasets. Our results suggest that Ligon configured with 10 iterations and 10 training examples per iteration achieves more than 95% of the F-measure achieved by state-of-the-art algorithms trained with a perfect oracle. Moreover, Ligon outperforms batch learning approaches devised to be trained with small amounts of training data by more than 40% F-measure on average.
AU - Sherif, Mohamed
AU - Dreßler}, Kevin
AU - Ngonga Ngomo, Axel-Cyrille
ID - 29010
KW - 2020 dice simba sherif ligon ngonga knowgraphs sys:relevantFor:limboproject limboproject sys:relevantFor:infai sys:relevantFor:bis limes limbo opal kevin
T2 - Proceedings of Ontology Matching Workshop 2020
TI - LIGON – Link Discovery with Noisy Oracles
ER -
TY - JOUR
AU - Liebendörfer, Michael
AU - Göller, Robin
AU - Biehler, Rolf
AU - Hochmuth, Reinhard
AU - Kortemeyer, Jörg
AU - Ostsieker, Laura
AU - Rode, Jana
AU - Schaper, Niclas
ID - 16961
JF - Journal für Mathematik-Didaktik
SN - 0173-5322
TI - LimSt – Ein Fragebogen zur Erhebung von Lernstrategien im mathematikhaltigen Studium
ER -
TY - GEN
AB - Dieses Lernangebot widmet sich der linearen Algebra als dem Teil der Mathematik, der neben der Optimierung und der Stochastik die Grundlage für praktisch alle Entwicklungen im Bereich Künstliche Intelligenz (KI) darstellt. Das Fach ist jedoch für Anfänger meist ungewohnt abstrakt und wird daher oft als besonders schwierig und unanschaulich empfunden. In diesem Kurs wird das Erlernen mathematischer Kenntnisse in linearer Algebra verknüpft mit dem aktuellen und faszinierenden Anwendungsfeld der künstlichen neuronalen Netze (KNN). Daraus ergeben sich in natürlicher Weise Anwendungsbeispiele, an denen die wesentlichen Konzepte der linearen Algebra erklärt werden können.
Behandelte Themen sind:
Der Vektorraum der reellen Zahlentupel, reelle Vektorräume allgemein
Lineare Abbildungen
Matrizen
Koordinaten und darstellende Matrizen
Lineare Gleichungssysteme, Gaußalgorithmus
Determinante
Ein Ausblick auf nichtlineare Techniken, die für neuronale Netzwerke relevant sind.
AU - Schramm, Thomas
AU - Gasser, Ingenuin
AU - Schwenker, Sören
AU - Seiler, Ruedi
AU - Lohse, Alexander
AU - Zobel, Kay
ID - 33273
TI - Linear Algebra driven by Data Science
ER -
TY - CONF
AB - Joining technology is regarded as a key technology for reducing energy consumption and CO2 imitation as well as the use of innovative materials and development of new, resource-saving products. Punch riveting is a widely used and established joining process in many sectors. The white and brown goods, electrical engineering, construction and, in particular, the automotive industry are some of the sectors mentioned here.
Since the design and assessment of punch rivet components with regard to structural durability can only be carried out experimentally using prototypes due to a lack of experience and calculation concepts, the improvement of this uneconomical and time-consuming procedure is the goal of this contribution.
Therefore, a numerical simulation and design method for cyclically loads punched riveted joints shall be introduced. This concept shall be based on the notch strain concept.
The following steps are necessary to achieve the goal shown above:
Tensile tests on all materials involved in the joint for determination of tensile strength and quasi-static stress-strain curves
Estimation of the cyclic material properties from the tensile strength in order to obtain the strain-life curve and the cyclic stress-strain curve
Estimation of mean stress sensitivity from the tensile strength to conduct an amplitude transformation for variable amplitude loadings.
Execution of a 2D forming simulation of the joining process to determine the geometry and the stresses and degrees of deformation present in the connection
Transferring the results of the forming simulation into a static-mechanical load simulation for determining the relation between the external load and the elastic-plastic strain at the critical point
Estimation of the service life by means of the damage parameter Wöhler curves calculated from the strain-life curve
In order to verify the simulation and calculation method, service life investigations have been carried out on punched riveted components under constant and variable amplitude load.
The test results, as well as the workflow through the fatigue assessment and its accuracy in estimation the fatigue life will be shown in this contribution.
AU - Masendorf, Lukas
AU - Wächter, Michael
AU - Horstmann, Stephan
AU - Otroshi, Mortaza
AU - Esderts, Alfons
AU - Meschut, Gerson
ID - 20146
KW - punch rivet
KW - notch strain conept
KW - structural durability
SN - 978-3-9820591-0-5
TI - Linear damage accumulation of self-pierce riveted joints
ER -
TY - CHAP
AU - Schuster, Britt-Marie
ED - Matthews-Schlinzig, Marie Isabel
ED - Schuster, Jörg
ED - Steinbrink , Gesa
ED - Strobel , Jochen
ID - 30954
KW - Textsortengeschichte
T2 - Handbuch Brief. Von der Frühen Neuzeit bis zur Gegenwart (Bd. 1: Interdisziplinarität – Systematische Perspektiven – Briefgenres)
TI - Linguistik des Briefs
VL - 1
ER -
TY - CONF
AU - Gorski, Peter Leo
AU - Acar, Yasemin
AU - Lo Iacono, Luigi
AU - Fahl, Sascha
ID - 47262
T2 - Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems
TI - Listen to Developers! A Participatory Design Study on Security Warnings for Cryptographic APIs
ER -
TY - GEN
AU - Helmert, Manuel Marc
ID - 19766
TI - Listen to theier Heart - Ein systematischer Literaturüberblick zur Rolle von Emotionen in nutzergenerierten Inhalten auf digitalen Plattformen
ER -
TY - CHAP
AU - Süwolto, Leonie
ED - Assmann, David-Christopher
ED - Tetzlaff, Stefan
ID - 33166
T2 - Poetik der Skizze. Verfahren und diskursive Verortungen einer Kurzprosaform vom Poetischen Realismus bis zur Frühen Moderne
TI - Literarisches Skizzieren als Körperpoetik. Theodor Storms "Marthe und ihre Uhr" (1848)
ER -
TY - JOUR
AU - Elit, Stefan
ID - 31357
JF - Wirkendes Wort
TI - Literarisches Wissen vom marxistischen Wissenschaftsbetrieb. Historiographische Ideologiedebatten in Gerti Tetzners „Karen W.“
ER -
TY - CHAP
AU - Zierau, Cornelia
ED - Ahouli, Akila
ID - 33752
T2 - Germanistik im Kontext des LMD-Systems. Didaktische und curriculare Herausforderung einer regionalen Hochschulpolitik für das Deutsch-Studium in Westafrika
TI - Literatur im Studium Deutsch als Fremdsprache und in der internationalen Germanistik: Sprachbildung und Förderung interkultureller Kompetenzen durch literarische Texte
ER -
TY - CHAP
AU - Kruse, Iris
ED - Brüggemann, Jörn
ED - Mesch, Birgit
ID - 34321
T2 - Sprache als Herausforderung - Literatur als Ziel. Kinder- und jugendliterarische Texte und Medien als Ressource für sprachsensibles Lernen
TI - Literatursprache im Medienvergleich erfahren. Literaturbezogene sprachliche Handlungserweiterungen in Lehr-Lernarrangements zu kinderliterarischen Medienverbünden
ER -
TY - CONF
AB - LLC resonant converters generally employ MOSFETs in the inverter stage, which can be of half-bridge
(HB) or full-bridge (FB) type. The generally weak intrinsic (body) diodes of the MOSFETs cause turn-on
losses when being forced to hard current commutations finally leading to the components self-destruction when operated constantly in this way. Consequently, zero-voltage switching (ZVS) operation is more or less essential in a silicon (Si) MOSFET-based HB or FB. To ensure ZVS, the LLC is operated in the inductive region, i.e. with lagging resonant current. On the contrary, IGBTs show dominant turn-off losses
and therefore are conventionally not applied in LLCs typically requiring high switching frequencies to achieve low output voltages. Yet, if the LLC is intentionally designed for the capacitive region, i. e.
operation with leading current, zero-current switching (ZCS) enabling IGBTs in the inverter stage can be ensured. This paper explores in detail the LLC in the capacitive operating region and gives design considerations for a capacitive LLC utilizing both robust and cost-efficient IGBTs for an exemplary 2.2 kW
automotive on-board DC-DC converter application. The results of a loss analysis show that the LLC resonant converter can be operated well in the capacitive region. In the given case, significantly lower
overall and 30 % lower inverter stage losses are achieved in the thermally relevant worst-case comparison with an inductive LLC based on Si MOSFETs.
AU - Urbaneck, Daniel
AU - Rehlaender, Philipp
AU - Schafmeister, Frank
AU - Böcker, Joachim
ID - 29874
T2 - PCIM Europe digital days 2020
TI - LLC Converter Design in Capacitive Operation utilizes ZCS for IGBTs – a Concept Study for a 2.2 kW Automotive DC-DC Stage
ER -
TY - CONF
AB - In this work, we initiate the research about the Gathering problem for robots
with limited viewing range in the three-dimensional Euclidean space. In the
Gathering problem, a set of initially scattered robots is required to gather at
the same position. The robots' capabilities are very restricted -- they do not
agree on any coordinate system or compass, have a limited viewing range, have
no memory of the past and cannot communicate. We study the problem in two
different time models, in FSYNC (fully synchronized discrete rounds) and the
continuous time model. For FSYNC, we introduce the 3D-Go-To-The-Center-strategy
and prove a runtime of $\Theta(n^2)$ that matches the currently best runtime
bound for the same model in the Euclidean plane [SPAA'11]. Our main result is
the generalization of contracting strategies (continuous time) from
[Algosensors'17] to three dimensions. In contracting strategies, every robot
that is located on the global convex hull of all robots' positions moves with
full speed towards the inside of the convex hull. We prove a runtime bound of
$O(\Delta \cdot n^{3/2})$ for any three-dimensional contracting strategy, where
$\Delta$ denotes the diameter of the initial configuration. This comes up to a
factor of $\sqrt{n}$ close to the lower bound of $\Omega (\Delta \cdot n)$
which is already true in two dimensions. In general, it might be hard for
robots with limited viewing range to decide whether they are located on the
global convex hull and which movement maintains the connectivity of the swarm,
rendering the design of concrete contracting strategies a challenging task. We
prove that the continuous variant of 3D-Go-To-The-Center is contracting and
keeps the swarm connected. Moreover, we give a simple design criterion for
three-dimensional contracting strategies that maintains the connectivity of the
swarm and introduce an exemplary strategy based on this criterion.
AU - Braun, Michael
AU - Castenow, Jannik
AU - Meyer auf der Heide, Friedhelm
ID - 16968
T2 - Proceedings of the 27th Conference on Structural Information and Communication Complexity (SIROCCO)
TI - Local Gathering of Mobile Robots in Three Dimensions
ER -
TY - THES
AU - Setzer, Alexander
ID - 18520
TI - Local Graph Transformation Primitives For Some Basic Problems In Overlay Networks
ER -
TY - JOUR
AU - Hesse, Kerstin
AU - Sloan, Ian H.
AU - Womersley, Robert S.
ID - 34629
JF - Journal of Computational and Applied Mathematics
KW - Applied Mathematics
KW - Computational Mathematics
SN - 0377-0427
TI - Local RBF-based penalized least-squares approximation on the sphere with noisy scattered data
VL - 382
ER -
TY - JOUR
AU - Nitsche, Thomas
AU - De, Syamsundar
AU - Barkhofen, Sonja
AU - Meyer-Scott, Evan
AU - Tiedau, Johannes
AU - Sperling, Jan
AU - Gábris, Aurél
AU - Jex, Igor
AU - Silberhorn, Christine
ID - 26289
JF - Physical Review Letters
SN - 0031-9007
TI - Local Versus Global Two-Photon Interference in Quantum Networks
ER -
TY - JOUR
AB - Many countries have opened their health care markets to private for-profit providers, aiming to promote quality and choice for patients. The prices are regulated and providers compete in location and quality. We show that whereas opening a public hospital market typically raises quality, the private provider strategically locates towards the corner of the market to avoid costly quality competition. Social welfare depends on the size of the regulator's budget and on the altruism of the public provider. If the budget is large, high quality results and welfare is highest in a duopoly whenever entry is optimal. If the budget is small, quality levels in a duopoly mirror the quality level in a monopoly. It can be optimal for the regulator not to use the full budget.
AU - Hehenkamp, Burkhard
AU - Kaarbøe, Odvar M.
ID - 17350
JF - Journal of Economic Behavior & Organization
TI - Location Choice and Quality Competition in Mixed Hospital Markets
VL - 177
ER -
TY - CONF
AU - Kucklick, Jan-Peter
AU - Müller, Oliver
ID - 17348
T2 - Symposium on Statistical Challenges in Electronic Commerce Research (SCECR)
TI - Location, location, location: Satellite image-based real-estate appraisal
ER -
TY - CONF
AU - Holst, Stefan
AU - Kampmann, Matthias
AU - Sprenger, Alexander
AU - Reimer, Jan Dennis
AU - Hellebrand, Sybille
AU - Wunderlich, Hans-Joachim
AU - Weng, Xiaoqing
ID - 19421
T2 - IEEE International Test Conference (ITC'20), November 2020
TI - Logic Fault Diagnosis of Hidden Delay Defects
ER -
TY - CHAP
AU - Peckhaus, Volker
ED - Beiderbeck, Friedrich
ED - Li, Wenchao
ED - Waldhoff, Stephan
ID - 17638
T2 - Gottfried Wilhelm Leibniz. Rezeption, Forschung, Ausblick
TI - Logik
ER -
TY - CONF
AU - Aßmuth, Verena
AU - Teutenberg, Dominik
AU - Meschut, Gerson
AU - Philipp, Jens
AU - Stammen, Elisabeth
AU - Dilger, Klaus
ID - 20652
T2 - 20. Kolloquium Gemeinsame Forschung in der Klebtechnik
TI - Lokales Konzept zur Auslegung von elastischen Klebverbindungen (LoKAl)
ER -
TY - CONF
AB - This paper presents the results of static short-term and long-term tensile tests for beta-nucleated joined polypropylene samples by the hot plate welding process. In the present study different dimensionless joining displacements are accounted for. The results show that high short-term tensile strength does not directly transfer to high long-term tensile strength. The morphology of the weld seam in the joined samples is examined by means of transmitted and reflected light microscopy. For the dimensionless joining displacements of 0.75 and 0.95, stretched spherulites are obtained. X-Ray diffraction can be used as a tool for qualitative and quantitative analysis and eventually for differentiation of samples of various joining displacements.
AU - Wübbeke, Andrea
AU - Schöppner, Volker
AU - Paul, André
AU - Tiemann, Michael
AU - Austermeier, Laura
AU - Fitze, Marcus
AU - Chen, Mingie
AU - Jakob, Fabian
AU - Heim, Hans-Peter
AU - Wu, Tao
AU - Niendorf, Thomas
AU - Röhricht, Marie-Luise
AU - Schmidt, Michael
ID - 42892
T2 - SPE ANTEC 2020: The Virtual Edition 5
TI - Long- and Short-Term Tensile Strength and Morphology of Joined Beta-Nucleated Polypropylene Parts
ER -
TY - CONF
AU - Schöppner, Volker
AU - Wübbeke, Andrea
AU - Paul, A.
AU - Tiemann, M.
AU - Austermeier, Laura
AU - Fitze, M.
AU - Chen, M.
AU - Jakob, F.
AU - Heim, H.-P-
AU - Wu, T.
AU - Niendorf, T.
AU - Röhricht, M.-L.
AU - Schmidt, M.
ID - 24472
T2 - ANTEC20
TI - LONG- AND SHORT-TERM TENSILE STRENGTH AND MORPHOLOGY OF JOINED BETA-NUCLEATED POLYPROPYLENE PARTS
ER -
TY - JOUR
AU - Gappa, Monika
AU - Filipiak‐Pittroff, Birgit
AU - Libuda, Lars
AU - Berg, Andrea
AU - Koletzko, Sibylle
AU - Bauer, Carl‐Peter
AU - Heinrich, Joachim
AU - Schikowski, Tamara
AU - Berdel, Dietrich
AU - Standl, Marie
ID - 26526
JF - Allergy
SN - 0105-4538
TI - Long‐term effects of hydrolyzed formulae on atopic diseases in the GINI study
ER -
TY - GEN
AU - Weber, Jutta
AU - Pentenrieder, Annelie
ED - Heßler, Martina
ED - Liggieri, Kevin
ID - 37507
T2 - Technikanthropologie. Handbuch für Wissenschaft und Studium
TI - Lucy Suchman
ER -
TY - CHAP
AU - Willeke, Stephanie
ED - Eke, Norbert Otto
ID - 31732
T2 - Vormärz-Handbuch
TI - Ludwig Tieck
ER -
TY - CHAP
AU - Diedrich, Alena
ED - Eke, Norbert Otto
ID - 49832
T2 - Handbuch Vormärz
TI - Lyrik im Vormärz
ER -
TY - CONF
AB - Network function virtualization (NFV) proposes
to replace physical middleboxes with more flexible virtual
network functions (VNFs). To dynamically adjust to everchanging
traffic demands, VNFs have to be instantiated and
their allocated resources have to be adjusted on demand.
Deciding the amount of allocated resources is non-trivial.
Existing optimization approaches often assume fixed resource
requirements for each VNF instance. However, this can easily
lead to either waste of resources or bad service quality if too
many or too few resources are allocated.
To solve this problem, we train machine learning models
on real VNF data, containing measurements of performance
and resource requirements. For each VNF, the trained models
can then accurately predict the required resources to handle
a certain traffic load. We integrate these machine learning
models into an algorithm for joint VNF scaling and placement
and evaluate their impact on resulting VNF placements. Our
evaluation based on real-world data shows that using suitable
machine learning models effectively avoids over- and underallocation
of resources, leading to up to 12 times lower resource
consumption and better service quality with up to 4.5 times
lower total delay than using standard fixed resource allocation.
AU - Schneider, Stefan Balthasar
AU - Satheeschandran, Narayanan Puthenpurayil
AU - Peuster, Manuel
AU - Karl, Holger
ID - 16219
T2 - IEEE Conference on Network Softwarization (NetSoft)
TI - Machine Learning for Dynamic Resource Allocation in Network Function Virtualization
ER -
TY - JOUR
AU - Webb, Mary E
AU - Fluck, Andrew
AU - Magenheim, Johannes
AU - Malyn-Smith, Joyce
AU - Waters, Juliet
AU - Deschênes , Michelle
AU - Zagami, Jason
ID - 20834
JF - Educational Technology Research and Development
TI - Machine learning for human learners: opportunities, issues, tensions and threats
ER -
TY - CHAP
AU - Reinhart, Felix
AU - von Enzberg, Sebastian
AU - Kühn, Arno
AU - Dumitrescu, Roman
ED - Beyerer, Jürgen
ED - Maier, Alexander
ED - Niggemann, Oliver
ID - 21391
T2 - Machine Learning for Cyber Physical Systems. Technologien für die intelligente Automation (Technologies for Intelligent Automation)
TI - Machine Learning for Process-X: A Taxonomy
VL - 11
ER -
TY - GEN
AU - Markewitz, Friedrich
ED - Gansel, Christina
ED - Spieß, Constanze
ID - 33022
T2 - WSK Band 6 (Wörterbücher zur Sprach- und Kommunikationswissenschaft): Text- und Diskurslinguistik
TI - Macht
VL - 6
ER -
TY - GEN
AU - Markewitz, Friedrich
ED - Gansel, Christina
ED - Spieß, Constanze
ID - 33023
T2 - WSK Band 6 (Wörterbücher zur Sprach- und Kommunikationswissenschaft): Text- und Diskurslinguistik
TI - Machtanalyse
VL - 6
ER -
TY - JOUR
AU - Grimminger-Seidensticker, Elke
ID - 28894
IS - 10
JF - sportunterricht
TI - Machthandlungen von Schüler*innen im Sportunterricht – Welche Rolle spielt das Sportlehrer*innenhandeln?
VL - 69
ER -
TY - CONF
AU - Mertin, Sven
AU - Malena, Kevin
AU - Link, Christopher
AU - Gausemeier, Sandra
AU - Trächtler, Ansgar
ID - 22966
T2 - The 23rd IEEE International Conference on Intelligent Transportation Systems
TI - Macroscopic Traffic Flow Control using Consensus Algorithms
VL - 23
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 28689
IS - 1
T2 - Zentralblatt für Mathematik und ihre Grenzgebiete [Zbl. 145.03014]
TI - Malink, Marko/ Vasudevan, Anubav, "The Peripatetic Program in Categorial Logic: Leibniz on Propositional Terms" (The Review of Symbolic Logic 13)
ER -
TY - CONF
AU - Eggert, A.
AU - Böhm, Eva
AU - Akalan, R.
AU - Gebauer, H.
ID - 46690
T2 - 2020 AMA Winter Academic Conference, San Diego, CA
TI - Manufacturers’ service growth through mergers and acquisitions – An event study
ER -
TY - CONF
AU - Chalicheemalapalli Jayasankar, Deviprasad
AU - Stallmeister, Tim
AU - Wang, Zheng
AU - Tröster, Thomas
ED - Hausmann, Joachim M
ED - Siebert, Marc
ED - von Hehl, Axel
ED - Weidenmann, Kay André
ID - 27417
T2 - Hybrid 2020 Materials and Structures
TI - MANUFACTURING OF HYBRID COMPONENTS BY VARTM-PROCESS USING NEW SEALING TECHNIQUE DEVELOPED
ER -
TY - JOUR
AU - Brand-Miller, Jennie
AU - Buyken, Anette
ID - 28011
JF - Nature Medicine
SN - 1078-8956
TI - Mapping postprandial responses sets the scene for targeted dietary advice
ER -
TY - CHAP
AU - Taschl-Erber, Andrea
ED - Hieke, Thomas
ED - Huber, Konrad
ID - 37819
T2 - Bibel falsch verstanden. Hartnäckige Fehldeutungen biblischer Texte erklärt
TI - Maria Magdalena: die Erstzeugin des Auferstandenen als „große Sünderin“? Diffamierende Umdeutungen der Apostelin
ER -
TY - CHAP
AU - Eke, Norbert
ED - Eke, Norbert
ID - 23814
T2 - Vormärz-Hhandbuch.
TI - Mark Hewitson: Militärwesen. Aus dem Englischen von Alena Diedrich und Norbert Otto Eke
ER -
TY - GEN
AU - Neibert, Katharina
ID - 39079
TI - Marktmissbrauch in digitalen Märkten - Eine wettbewerbspolitische Analyse am Beispiel von Facebook
ER -
TY - GEN
AU - Niggemeyer, Laura
ID - 39070
TI - Marktmissbrauch in digitalen Märkten - eine wettbewerbspolitische Analyse mit Fallbeispielen von Google, Facebook und Amazon
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 38132
TI - Marx heute. Eine Einführung in die kritische Theorie der Kommunikation, der Kultur, der digitalen Medien und des Internets
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 37197
TI - Marxism. Karl Marx’s Fifteen Key Concepts for Cultural and Communication Studies. Key Ideas in Media & Cultural Studies Series
ER -
TY - JOUR
AU - Beaudouin, F
AU - Aus der Fünten, K
AU - Tröß, T
AU - Reinsberger, Claus
AU - Meyer, T
ID - 31714
JF - Clin J Sport Med
SN - 1050-642x
TI - Match Situations Leading to Head Injuries in Professional Male Football (Soccer)-A Video-Based Analysis Over 12 Years.
VL - 30 Suppl 1
ER -
TY - GEN
AU - N., N.
ID - 42294
TI - Matching in Netzwerken
ER -
TY - GEN
AU - N., N.
ID - 42306
TI - Matching Mechanisms and Organ Exchange
ER -
TY - JOUR
AB - We analyze the actual behavior of agents in a matching mechanism, using data from a clearinghouse at the Faculty of Business Administration and Economics at a German university, where a variant of the Boston mechanism is used. We supplement this data with data generated in a survey among the students who participated in the clearinghouse. We find that under the current mechanism over 74% of students act strategically by misrepresenting at least one of their preferences. Nevertheless, not all students are able to improve their outcome by doing so. We show that this is mainly due to the incomplete information of students and naiveté. Sophisticated students actually reach significantly better outcomes than naive students. Thus, we find evidence that naive students are exploited by sophisticated students in an incomplete information setting.
AU - Hoyer, Britta
AU - Stroh-Maraun, Nadja
ID - 16334
JF - Games and Economic Behavior
TI - Matching Strategies of Heterogeneous Agents under Incomplete Information in a University Clearinghouse
VL - 121
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Hillemeyer, Johannes
ID - 24247
T2 - 73rd Annual Assembly of International Institute of Welding (IIW) and International Conference
TI - Material Specific Predicting of the Optimal Joining Parameters for the Screw Blind Rivet Joining Process
ER -
TY - JOUR
AU - Altepeter, Matthias
AU - Schöppner, Volker
ID - 23861
JF - Kunststoffe
TI - Materialabbau im Doppelschneckenextruder
ER -
TY - JOUR
AU - Steiner, Evi
AU - Winkler, Michael
ID - 37339
JF - Journal of Nonlinear Science
TI - Mathematical Analysis of Two Competing Cancer Cell Migration Mechanisms Driven by Interstitial Fluid Flow
VL - 30
ER -
TY - JOUR
AB - Abstract
Mathematics learning support centres (MLSC) are widely established and evaluated in English-speaking countries (such as the UK, Ireland and Australia). In most of these countries, several national surveys on MLSCs exist. They give an overview of the number of MLSCs as well as their characteristics in these countries. In Germany, there is a lack of studies on MLSCs and the landscape of MLSCs has not been described yet. This article presents basic information concerning counts of MLSCs and their characteristics at universities. Based on a three-step approach of analysing university homepages and additional personal contact via email or phone calls, we gathered typical MLSC features (e.g. staff quantities and qualification, opening and support hours, supported study programmes). We analysed 190 universities from a web-based register on study programmes. In total, we found 61 MLSCs located at 51 German universities. Another 16 support centres were specialized on mathematics didactics, which means they focussed on didactical and methodological support for preservice teacher students and often provided different teaching materials. Thirty-eight centres were located at universities (62.3%) and 23 MLSCs at universities of applied sciences and comparable universities (37.7%). The MLSCs were different in their sizes of staff and opening hours, and both the numbers of staff and the service hours differed greatly. The student groups MLSCs at German universities focus on differ concerning characteristics like study programme or semester. We will provide the main categories describing these groups. We seek to answer research questions concerning the characteristics of MLSCs in Germany and discuss the results compared to international findings. This information is useful for further international collaborative research, for example a standardized international survey. From a national perspective, these findings support networking and collaborations between the MLSCs as well. As some German MLSCs are facing financial cuts, these results might help in gaining additional funding.
AU - Schürmann, Mirko
AU - Gildehaus, Lara
AU - Liebendörfer, Michael
AU - Schaper, Niclas
AU - Biehler, Rolf
AU - Hochmuth, Reinhard
AU - Kuklinski, Christiane
AU - Lankeit, Elisa
ID - 35712
IS - 2
JF - Teaching Mathematics and its Applications: An International Journal of the IMA
KW - Education
KW - General Mathematics
SN - 0268-3679
TI - Mathematics learning support centres in Germany—an overview
VL - 40
ER -
TY - CHAP
AU - Häsel-Weide, Uta
ED - Cramer, Colin
ED - König, Johannes
ED - Rothland, Martin
ED - Blömeke, Sigrid
ID - 31550
SN - 978-3-8252-5473-5
T2 - Handbuch Lehrerinnen- und Lehrerbildung
TI - Mathematik (Primarstufe) in der Lehrerinnen- und Lehrerbildung. Qualifizierung für das Lehren von Mathematik in der Grundschule.
ER -
TY - BOOK
ED - Hilgert, Joachim
ID - 51488
TI - Mathematik studieren -- Ein Ratgeber für Erstsemester und solche, die es vielleicht werden wollen
ER -
TY - CHAP
AU - Rezat, Sebastian
ED - Meister, Dorothee
ED - Ilka, Mindt
ID - 44688
SN - 2512-112X
T2 - Mobile Medien im Schulkontext
TI - Mathematiklernen mit digitalen Schulbüchern im Spannungsfeld zwischen Individualisierung und Kooperation
ER -
TY - CONF
AU - Bruns, Julia
ED - Siller, Hans-Stefan
ED - Weigel, Wolfgang
ED - Wörler, Jan
ID - 36539
T2 - Beiträge zum Mathematikunterricht 2020
TI - Mathematisches Fachwissen von frühpädagogischen Fachpersonen im Spannungsfeld zwischen Disziplin- und Praxis
ER -
TY - JOUR
AU - Caylak, Ismail
AU - Penner, Eduard
AU - Mahnken, Rolf
ID - 24374
JF - Computer Methods in Applied Mechanics and Engineering
SN - 0045-7825
TI - Mean-field and full-field homogenization with polymorphic uncertain geometry and material parameters
ER -
TY - JOUR
AU - Schönherr, Johanna
AU - Schukajlow, S.
AU - Leopold, C.
ID - 45338
IS - 1
JF - ZDM – Mathematics Education
TI - Measuring and investigating strategic knowledge about drawing to solve geometry modelling problems
VL - 52
ER -
TY - JOUR
AU - Svartdal, Frode
AU - Klingsieck, Katrin B.
AU - Steel, Piers
AU - Gamst-Klaussen, Thor
ID - 29111
JF - Personality and Individual Differences
SN - 0191-8869
TI - Measuring implemental delay in procrastination: Separating onset and sustained goal striving
ER -
TY - CHAP
AU - Alptekin, Mesut
AU - Temmen, Katrin
ID - 35639
SN - 2194-5357
T2 - Advances in Intelligent Systems and Computing
TI - Measuring Students’ Device Specific Competencies Using an Eye-Tracking Study on Oscilloscopes
ER -
TY - GEN
AB - This paper introduces an index that comprehensively measures the complexity of countries’ corporate income tax systems faced by multinational corporations. It builds on surveys of highly experienced tax consultants of the largest international tax services networks. The index, called the Tax Complexity Index (TCI), is composed of a tax code subindex covering tax regulations and a tax framework subindex covering tax processes and features. For a sample of 100 countries, we find that tax complexity varies considerably across countries, and tax code and framework complexity also vary within countries. Among others, tax complexity is strongly driven by the complexity of transfer pricing regulations in the tax code and tax audits in the tax framework. When analyzing the associations with other country characteristics, we identify different patterns. For example, with regard to GDP, we find a positive association with tax code complexity and a negative association with tax framework complexity, suggesting that highly economically developed countries tend to have more complex tax codes and less complex frameworks. Overall, our tax complexity measures can serve as valuable proxies in future research and supportive tools for a variety of firm decisions and national and international tax policy discussions.
AU - Hoppe, Thomas
AU - Schanz, Deborah
AU - Sturm, Susann
AU - Sureth-Sloane, Caren
ID - 21418
TI - Measuring Tax Complexity Across Countries: A Survey Study on MNCs
VL - No. 5
ER -
TY - GEN
AU - Anonymous, Anonymous
ID - 21118
TI - Measuring the Performance of SNARK Libraries
ER -
TY - JOUR
AU - Poddubnyi, Vladimir I.
AU - Trächtler, Ansgar
AU - Warkentin, Andreas
AU - Henke, Christian
ID - 27130
JF - Vestnik Mashinostroeniya
TI - Mechanical and mathematical model of a caterpillar drive with a triangular contour for solving problems of vertical dynamics of a tracked vehicle
ER -
TY - THES
AU - Stroh-Maraun, Nadja
ID - 16910
TI - Mechanisms, Preferences, and Heterogeneity in Matching Markets
ER -
TY - THES
AU - Gense, Alexander
ID - 42068
TI - Mechatronischer Entwurf eines geregelten Federungssystems für mittelschwere gepanzerte Kettenfahrzeuge
ER -
TY - CHAP
AU - Albus, Vanessa
ED - Albus, Vanessa
ED - Schalk, Helge
ID - 50695
T2 - Handbuch Medien im Philosophie- und Ethikunterricht
TI - Medien im Ethik- und Philosophieunterricht
ER -
TY - CONF
AU - Drossel, Kerstin
AU - Heldt, M.
ID - 52520
T2 - Projektvorstellung im Rahmen der Online Ringvorlesung des BMBF-Metavorhabens 'Digitalisierung im Bildungsbereich' Bildungsdialog.Digital: Inside Bildungsforschung. Universität Duisburg-Essen (online)
TI - Medienbezogene Lehrerkooperation als Schulqualitätsmerkmal in der digitalen Welt
ER -
TY - JOUR
AU - Drossel, Kerstin
AU - Heldt, Melanie
ID - 27834
JF - Schulmagazin 5-10
TI - Medienbezogene Lehrerkooperation. Kooperationsformen und thematische Schwerpunkte
ER -
TY - JOUR
AU - Herzig, Bardo
ID - 40288
IS - 13
JF - Zeitschrift für Grundschulforschung
TI - Medienbildung in der Grundschule - ein konzeptioneller Beitrag zur Auseinandersetzung mit (digitalen) Medien.
ER -
TY - JOUR
AU - Herzig, Bardo
ID - 40255
IS - 33
JF - TELEVIZION 33/2020/2
TI - Medienkompetenz. Modellierung, Messung und Bedeutung in Zeiten der Coronapandemie
ER -
TY - CHAP
AU - Neiske, Iris
AU - Bücker, Diana
ID - 49869
SN - 1424-3636
T2 - Medienpädagogik als Schlüsseldisziplin in einer mediatisierten Welt. Perspektiven aus Theorie, Empirie und Praxis 37
TI - Medienpädagogik und Hochschuldidaktik
ER -
TY - JOUR
AU - Dehmel, Lukas
ID - 43150
JF - Zeitschrift MedienPädagogik 37
TI - Medienpädagogisches Erwachsenenbildungspersonal und Mediatisierung. Konzeptionelle Überlegungen zur theoretischen Erfassung biografischer Bearbeitungsprozesse
ER -
TY - CHAP
AU - Matzner, Tobias
ED - Heidbrink, Ludger
ED - Gröppel-Klein, Andrea
ID - 42905
T2 - Die dunklen Seiten des Konsums – Alte Probleme, neue Herausforderungen
TI - Mediensucht? Über die Medikalisierung der Mediennutzung in Suchtdebatten
ER -
TY - CHAP
AU - Moritz, Tilman
ED - Stiegemann, Christoph
ID - 49006
SN - 978-3-7319-0956-9
T2 - Peter Paul Rubens und der Barock im Norden. Katalog zur Ausstellung im Erzbischöflichen Diözesanmuseum Paderborn
TI - Mehr Barock wagen. Neuordnungen des Fürstbistums Paderborn aus dem Dreißigjährigen Krieg
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Krampe, Erhard
AU - Böhnke, Birte
ID - 24248
JF - Kunststoffe
TI - Mehr Materialkombinationen, weniger Kosten
ER -
TY - GEN
AU - Markewitz, Friedrich
ID - 32763
IS - 1
T2 - Journal für Medienlinguistik
TI - Mehrfach annotierte Textkorpora. Strukturierte Speicherung und Abfrage
VL - 3
ER -
TY - JOUR
AU - Ballweg, Sandra
ID - 31620
JF - Zeitschrift für Interkulturellen Fremdsprachenunterricht
TI - Mehrsprachigkeit in der Familie: Einführung in den Themenschwerpunkt
ER -
TY - JOUR
AU - Opel, Simone
AU - Nordemann, Lina
AU - Schulte, Carsten
AU - Tenberge, Claudia
ID - 39465
JF - Merz Medien + Erziehung. Zeitschrift für Medienpädagogik.
TI - Mensch, Maschine! Ein unplugged-Einstieg in KI und maschinelles Lernen.
ER -
TY - GEN
AU - Weber, Jutta
ED - Heßler, Martina
ED - Liggieri, Kevin
ID - 37508
T2 - Technikanthropologie. Handbuch für Wissenschaft und Studium
TI - MenschMaschine
ER -
TY - JOUR
AB - BACKGROUND: A detail of previous studies on mental rotation, which has not received any attention so far, relates to the testing situation of the participants. In nearly every study, participants were tested in a sitting posture (and not standing). However, when considering embodied cognition approaches on mental processes, participants may not be able to fully exploit these processes when performing mental rotation tasks in a sitting posture.
AIM: Therefore, the aim of the present study is to examine the potential influence of two different postures (sitting vs. standing), when solving mental body rotation tasks.
METHOD: Sixteen participants (6 females) were tested in two mental body-rotation tasks (MBRT), requiring either an object-based spatial transformation (based on a same-different judgment) or an egocentric transformation (based on a left-right judgment) in a sitting and in a standing posture. Reaction times and response errors were analysed in two three-way ANOVAs, with the factors orientation, task, and posture.
RESULTS: Results revealed an effect of orientation and task, indicating that participants performed better for egocentric than for object-based transformations. However, there was no effect of posture.
CONCLUSION: The different dynamics of postural control during sitting and standing do not induce different embodiment effects on mental rotation.
AU - Budde, Kirsten
AU - Barela, José Angelo
AU - Figueiredo, Gabriella Andreeta
AU - Weigelt, Matthias
ID - 37796
IS - 2
JF - Brazilian Journal of Motor Behavior
KW - General Engineering
SN - 2446-4902
TI - Mental body rotation with egocentric and object-based transformations in different postures: sitting vs. standing
VL - 14
ER -
TY - JOUR
AB - BACKGROUND: A detail of previous studies on mental rotation, which has not received any attention so far, relates to the testing situation of the participants. In nearly every study, participants were tested in a sitting posture (and not standing). However, when considering embodied cognition approaches on mental processes, participants may not be able to fully exploit these processes when performing mental rotation tasks in a sitting posture.
AIM: Therefore, the aim of the present study is to examine the potential influence of two different postures (sitting vs. standing), when solving mental body rotation tasks.
METHOD: Sixteen participants (6 females) were tested in two mental body-rotation tasks (MBRT), requiring either an object-based spatial transformation (based on a same-different judgment) or an egocentric transformation (based on a left-right judgment) in a sitting and in a standing posture. Reaction times and response errors were analysed in two three-way ANOVAs, with the factors orientation, task, and posture.
RESULTS: Results revealed an effect of orientation and task, indicating that participants performed better for egocentric than for object-based transformations. However, there was no effect of posture.
CONCLUSION: The different dynamics of postural control during sitting and standing do not induce different embodiment effects on mental rotation.
AU - Budde, Kirsten
AU - Barela, José Angelo
AU - Figueiredo, Gabriella Andreeta
AU - Weigelt, Matthias
ID - 48036
IS - 2
JF - Brazilian Journal of Motor Behavior
SN - 2446-4902
TI - Mental body rotation with egocentric and object-based transformations in different postures: sitting vs. standing
VL - 14
ER -
TY - JOUR
AB - AbstractPurposeIn sports games, tactical instructions are mostly presented on tactic boards under temporal constraints determined by the length of time outs (e.g., 20–60 s time outs in basketball) and coaches’ instructional behavior. Thus, instructions should be presented in a way that enables fast and errorless information processing. High affordances in visual–spatial transformation (e.g., mental rotation processes) might both impede information processing and decrease execution performance. The aim of this study was to scrutinize the effect of different orientations of visual tactical displays on observation time under self-paced conditions as well as to compare the effects on execution performance to those of externally paced conditions. According to the self-determination theory, self-control over observation time is assumed to increase performance.MethodsIn a mixed-factors design with two factors, 48 participants were instructed to execute a basketball playing pattern, which was presented on a virtual tactic board in one of five different spatial disparities to the players’ on-court perspective. The Self-Paced Group determined the observation time in a self-controlled manner, whereas in the Yoked Group observation times were externally controlled, i.e., the observation time was constrained to match that of the Self-Paced Group..ResultsThe self-controlled time for watching the pattern before execution was significantly shorter and spatial accuracy in pattern execution was significantly higher for low disparity between instruction perspective and on-court perspective. Self-control over observation time did not affect execution accuracy.ConclusionThe orientation effects might be explained by interfering mental rotation processes that are necessary to transform the instructional perspective into the players’ egocentric perspective. According to these results, coaches should align their tactic boards to their players’ on-court viewing perspective.
AU - Krause, Daniel
AU - Weigelt, Matthias
ID - 37787
IS - 3
JF - German Journal of Exercise and Sport Research
KW - Physical Therapy
KW - Sports Therapy and Rehabilitation
KW - Orthopedics and Sports Medicine
SN - 2509-3142
TI - Mental rotation and performance in basketball: effects of self-controlled and externally controlled time constraints on the processing and execution of tactic board instructions with varied orientations
VL - 50
ER -
TY - CONF
AU - Schröder, Jan
AU - Vogelsang, Christoph
AU - Riese, Josef
ED - Habig, Sebastian
ID - 45465
T2 - Naturwissenschaftliche Kompetenzen in der Gesellschaft von morgen. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Wien 2019
TI - Messung der Fähigkeit zur Unterrichtsplanung bei Lehramtsstudierenden
VL - 40
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Wittke, M.
ID - 24249
JF - MNWP Magazin
TI - Metallsubstitution durch Spritzgießtechnik gerät allmählich in Reichweite
ER -
TY - JOUR
AU - Sain, Basudeb
AU - Zentgraf, Thomas
ID - 16839
JF - Light: Science & Applications
SN - 2047-7538
TI - Metasurfaces help lasers to mode-lock
VL - 9
ER -
TY - CONF
AU - Japs, Segej
AU - Kharatyan, Aschot
AU - Tekaat, Julian
AU - Kaiser, Lydia
AU - Dumitrescu, Roman
ID - 21382
T2 - Proceedings of the Design Society
TI - Method for 3D-Environment Driven Domain Knowledge Elicitaion and System Model Generation
ER -
TY - JOUR
AU - Massmann, Melina
AU - Meyer, Maurice
AU - Frank, Maximilian
AU - von Enzberg, Sebastian
AU - Kühn, Arno
AU - Dumitrescu, Roman
ID - 20447
IS - 93
JF - Procedia CIRP
TI - Method for data inventory and classification
ER -
TY - JOUR
AU - Gräßler, Iris
AU - Oleff, Christian
AU - Scholle, Philipp
ID - 23529
JF - Applied Sciences 23/2020 (23)
TI - Method for Systematic Assessment of Requirement Change Risk in Industrial Practice
ER -
TY - THES
AU - Ditter, Jan
ID - 19743
SN - 978-3-8440-7530-4
TI - Methodenentwicklung zum Entfügen von Stahl-Klebverbindungen bei tiefen Temperaturen
ER -
TY - GEN
AB - Der Karosseriebau ist zunehmend durch die Verwendung unterschiedlicher Werkstoffe in Mischbauweise gekennzeichnet, was zu einem Einsatz von mechanischen Fügeverfahren geführt hat. Hieraus resultieren die Zielsetzungen, die mechanischen Fügeverfahren in ihrer Effizienz und ihren Einsatzbereichen zu erweitern, sowie die Anzahl der Experimente zu reduzieren und Entwicklungszyklen zu verkürzen. Dies erfolgt mit Unterstützung der numerischen Simulation. Neben der Beschreibung des plastischen Verhaltens gilt es auch, das Schädigungsverhalten abzubilden.
Der Fügeprozess bzw. die Fügerichtung erfolgt senkrecht zur Blechoberfläche und führt somit zu einem dreidimensionalen Zustand der Fügelemente. Hieraus leitet sich die Herausforderung ab, das Werkstoffversagen in Abhängigkeit der Beanspruchungssituation zu beschreiben. Ein einfacher Ansatz zur Abbildung des Durchdringens ist ein geometrisches Trennkriterium.
Ein solches Kriterium basiert i.d.R. auf einem experimentell beobachteten Verhalten und ist somit nicht prognosefähig für Variationen bzgl. Werkzeugkonfigurationen, Blechdicken- und Werkstoffgüten-Kombinationen. In diesem Projekt wird das Schädigungsmodell GISSMO (Generalized Incremental Stress State dependent damage Model) verwendet, um die Entwicklung der duktilen Schädigung zu beschreiben und den Bruchbeginn während des Stanzniet- und Schneidclinchens vorherzusagen.
Der Spannungszustand während der Prozesssimulation wird untersucht und die verschiedenen Schädigungsproben werden experimentell erprobt, um die Versagenskurven zu charakterisieren. Die Versagenskurven werden im Schädigungsmodell GISSMO definiert. Um die Genauigkeit des Modells zu gewährleisten, wird die Verifizierung des Modells durch die Simulation von Schädigungsproben mit dem Schädigungsmodell durchgeführt.
Zur Validierung des Modells wird die Simulation des Fügeprozesses mit dem Schädigungsmodell durchgeführt und die Ergebnisse von Simulation und Experiment verglichen. Darüber hinaus werden Sensitivitätsanalysen durchgeführt, um die Einflüsse der Fertigungsprozesse, der Lackierung und des Diskretisierungsgrades auf das Schädigungsverhalten des Materials zu identifizieren.
Das IGF-Vorhaben „Methodenentwicklung zur Schädigungsmodellierung für die numerische Prozesssimulation mechanischer Fügeverfahren" der Forschungsvereinigung EFB e.V. wurde unter der Fördernummer AiF 19452N über die Arbeitsgemeinschaft industrieller Forschungsvereinigungen (AiF) im Rahmen des Programms zur Förderung der Industriellen Gemeinschaftsforschung (IGF) vom Bundesministerium für Wirtschaft und Energie aufgrund eines Beschlusses des Deutschen Bundestages gefördert. Der Abschlussbericht ist als EFB-Forschungsbericht Nr. 527 erschienen und bei der EFB-Geschäftsstelle und im Buchhandel erhältlich.
AU - Otroshi, Mortaza
AU - Meschut, Gerson
ID - 20145
SN - 978-3-86776-582-4
TI - Methodenentwicklung zur Schädigungsmodellierung für die numerische Prozesssimulation mechanischer Fügeverfahren
ER -
TY - BOOK
ED - Hagengruber, Ruth
ED - Thorgeirsdottir, Sigridur
ID - 31436
TI - Methodological Reflections on Women’s Contribution and Influence in the History of Philosophy. Women in the History of Philosophy and Sciences, Vol 3
ER -
TY - JOUR
AU - Yu, Xiaoqian
AU - Herberg, Artjom
AU - Kuckling, Dirk
ID - 23847
IS - 10
JF - Polymers
SN - 2073-4360
TI - Micellar Organocatalysis Using Smart Polymer Supports: Influence of Thermoresponsive Self-Assembly on Catalytic Activity
VL - 12
ER -
TY - CONF
AB - Efficiencies and energy yields of microinverters available on the market during 2014‒2020 have been
measured, compared, and ranked. Conversion efficiencies as a function of load have been measured indoors with high
accuracy and ranked according to Euro- and CEC weightings. Energy yields have been measured outdoors via
identical and calibrated crystalline silicon PV modules of 215 Wp each. Inverters with two inputs have been fed by
two of those modules. DC input, AC power output and energy yield of each micro-inverter have been recorded by
individual calibrated electricity meters. Apparently, some inverters have been optimized for high irradiance levels
and ranked better at the CEC efficiency ranking, others performed very well also at low irradiance levels, thus
ranking higher at in the EU efficiency ranking. Efficiency ranks are slightly deviating from rankings by energy yield
measurements. At one inverter, a slow MPPT algorithm that barely could follow quickly changing irradiance levels is
most probably responsible for this effect. Another inverter switched off for a while after operation at high power,
another one failed permanently. Apparently, some inverters are been optimized to show excellent datasheet ratings
for EU- or CEC- efficiency. On the other hand, two inverters (each featuring two inputs) did not show an outstanding
performance at the EU- and CEC-ratings but achieved leading ranks for AC energy yields. For the customer, AC
yield is a major performance indicator of a microinverter and should be included in the datasheet.
AU - Krauter, Stefan
AU - Bendfeld, Jörg
ID - 18390
SN - 3-936338-73-6
T2 - Proceedings of the EUPVSEC 2020
TI - Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields
ER -
TY - CONF
AU - Reitzig, Sven
AU - Rüsing, Michael
AU - Kirbus, Benjamin
AU - Gossel, Joshua
AU - Singh, Ekta
AU - Eng, Lukas M.
AU - Zhao, Jie
AU - Mookherjea, Shayan
ID - 47960
T2 - 2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF)
TI - micro-Raman Investigations of Periodically-Poled X-Cut Thin-Film Lithium Niobate for Integrated Optics
ER -
TY - CONF
AU - Rozo Vasquez, Julian
AU - Arian, Bahman
AU - Riepold, Markus
AU - Homberg, Werner
AU - Trächtler, Ansgar
AU - Walther, Frank
ID - 22965
T2 - 54. Metallographie-Tagung
TI - Microstructural investigation on phase transformation during flow forming of the metastable austenite AISI 304
ER -
TY - CONF
AU - Lösch, Achim
AU - Platzner, Marco
ID - 20838
SN - 9781728174457
T2 - 2020 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW)
TI - MigHEFT: DAG-based Scheduling of Migratable Tasks on Heterogeneous Compute Nodes
ER -
TY - CONF
AB - Let G = (V,E) be an undirected graph on n vertices with non-negative capacities on its edges. The mincut sensitivity problem for the insertion of an edge is defined as follows. Build a compact data structure for G and a given set S ⊆ V of vertices that, on receiving any edge (x,y) ∈ S×S of positive capacity as query input, can efficiently report the set of all pairs from S× S whose mincut value increases upon insertion of the edge (x,y) to G. The only result that exists for this problem is for a single pair of vertices (Picard and Queyranne, Mathematical Programming Study, 13 (1980), 8-16). We present the following results for the single source and the all-pairs versions of this problem.
1) Single source: Given any designated source vertex s, there exists a data structure of size 𝒪(|S|) that can output all those vertices from S whose mincut value to s increases upon insertion of any given edge. The time taken by the data structure to answer any query is 𝒪(|S|).
2) All-pairs: There exists an 𝒪(|S|²) size data structure that can output all those pairs of vertices from S× S whose mincut value gets increased upon insertion of any given edge. The time taken by the data structure to answer any query is 𝒪(k), where k is the number of pairs of vertices whose mincut increases.
For both these versions, we also address the problem of reporting the values of the mincuts upon insertion of any given edge. To derive our results, we use interesting insights into the nearest and the farthest mincuts for a pair of vertices. In addition, a crucial result, that we establish and use in our data structures, is that there exists a directed acyclic graph of 𝒪(n) size that compactly stores the farthest mincuts from all vertices of V to a designated vertex s in the graph. We believe that this result is of independent interest, especially, because it also complements a previously existing result by Hariharan et al. (STOC 2007) that the nearest mincuts from all vertices of V to s is a laminar family, and hence, can be stored compactly in a tree of 𝒪(n) size.
AU - Baswana, Surender
AU - Gupta, Shiv
AU - Knollmann, Till
ED - Grandoni, Fabrizio
ED - Herman, Grzegorz
ED - Sanders, Peter
ID - 20159
KW - Mincut
KW - Sensitivity
KW - Data Structure
SN - 1868-8969
T2 - 28th Annual European Symposium on Algorithms (ESA 2020)
TI - Mincut Sensitivity Data Structures for the Insertion of an Edge
VL - 173
ER -
TY - JOUR
AU - Kamcili-Yildiz, Naciye
AU - Reis, Oliver
AU - Mauritz, Gerrit
AU - Hillebrand, Miriam
AU - Wittke, Annika
ID - 42100
IS - 1
JF - Theo-Web. Zeitschrift für Religionspädagogik
TI - Mindsets guter Lehre in Beziehung zu den Mindsets religiöser Pluralität
VL - 19
ER -