TY - GEN
ED - Ade, Larissa
ED - Breiwe, René
ED - Dehmel, Lukas
ED - Wolf, Karsten D.
ED - Rummler, Klaus
ED - Dander, Valentin
ED - Grünberger, Nina
ED - Schiefner-Rohs, Mandy
ID - 46474
IS - 53
TI - ENT | GRENZ | UNGEN in der Medienpädagogik. Perspektiven im Anschluss an den 28. Kongress der DGfE
ER -
TY - JOUR
AU - Dehmel, Lukas
AU - Meister, Dorothee
AU - Gerhardts, Lara
ID - 46472
IS - 53
JF - Zeitschrift MedienPädagogik
TI - Die Entgrenzung von Kommunikationskulturen in Lehrpersonenkollegien. Reflexion einer unbeabsichtigten Begleiterscheinung der Arbeit mit Tablets.
ER -
TY - CHAP
AB - Dieser Beitrag bietet verschiedene professionelle Perspektiven auf den popmusikalischen Kommunikationsprozesses innerhalb postdigitaler Popmusikjournalismuskulturen. Neben einer wissenschaftlichen Rahmung, Übersicht und Strukturierung des Untersuchungsfelds und des Forschungsstands versammelt der Beitrag multiperspektivische Thesen, die journalistische Praktiken und ihre Reflexionen von Produktion über Distribution und Rezeption/Nutzung bis zur Weiterverarbeitung inklusive Archivierung/Institutionalisierung/Musealisierung aufgreifen und herausstellen. Die aufgestellten Thesen gelten als Aufschlag für die zukünftige Analyse des so fundamentalen und doch auch immer wieder übersehenen Berufsfeldes und seiner Rezeption zwischen Faszination und Exploitation.
AU - Godlewsky, Tanja
AU - Jacke, Christoph
AU - Roenneke, Stefanie
AU - Venker, Thomas
ED - Moormann, Peter
ED - Ruth, Nicolas
ID - 46475
SN - 2626-6199
T2 - Musik und Internet. Aktuelle Phänomene populärer Kulturen
TI - Pop(musik)journalismen zwischen Printmagazin-Krise und postdigitaler Realität – Forschungsüberblick und multiperspektivische Thesen
ER -
TY - CONF
AB - Abstract. Increasing resource efficiency is a major challenge and affects almost every aspect of social and economic life. The mobility sector in particular is responsible for a large share of primary energy consumption and is increasingly in the focus of public interest. One possibility to adress these challenges is to reduce the vehicle weight by means of lightweight construction technologies such as multi-material systems. These assemblies consist of workpieces with different mechanical and geometrical properties, which poses a major challenge for joining technology. Mechanical joining processes such as semi-tubular self-piercing riveting are often used in the production of these assemblies, but due to their process characteristics, they are rigid and can only react to changing process variables to a limited extent. One way to increase the versatility of self-piercing riveting is to superimpose a tumbling kinematics on the punch. During tumbling, an angular offset of the punch axis to the tool axis is set and the contact area between punch and workpiece is reduced. In this work, investigations were carried out to determine how the tumbling strategy, consisting of the parameters tumbling angle, tumbling onset and tumbling kinematics, affects the material flow of the rivet element. For this purpose, experimental tests are conducted with the typical materials of conventional multi-material systems and the geometric joint formations are determined by means of macrographs.
AU - Wituschek, S.
AU - Elbel, L.
AU - Lechner, M.
ID - 46476
SN - 2474-395X
T2 - Materials Research Proceedings
TI - Versatile self-piercing riveting with a tumbling superimposed punch
ER -
TY - JOUR
AU - Lange, Nina Amelie
AU - Schapeler, Timon
AU - Höpker, Jan Philipp
AU - Protte, Maximilian
AU - Bartley, Tim
ID - 46468
IS - 2
JF - Physical Review A
SN - 2469-9926
TI - Degenerate photons from a cryogenic spontaneous parametric down-conversion source
VL - 108
ER -
TY - JOUR
AU - Bartelheimer, Christian
AU - zur Heiden, Philipp
AU - Berendes, Carsten Ingo
AU - Beverungen, Daniel
ID - 46478
JF - European Journal of Information Systems
KW - Library and Information Sciences
KW - Information Systems
SN - 0960-085X
TI - Designing digital actor engagement platforms for local high streets: an action design research study
ER -
TY - THES
AB - Ever increasing demands on the performance of microchips are leading to ever more complex semiconductor technologies with ever shrinking feature sizes. Complex applications with high demands on safety and reliability, such as autonomous driving, are simultaneously driving the requirements for test and diagnosis of VLSI circuits. Throughout the life cycle of a microchip, uncertainties occur that affect its timing behavior. For example, weak circuit structures, aging effects, or process variations can lead to a change in the timing behavior of the circuit. While these uncertainties do not necessarily lead to a change of the functional behavior, they can lead to a reliability problem.
With modular and hybrid compaction two test instruments are presented in this work that can be used for X-tolerant test response compaction in the built-in Faster-than-At-Speed Test (FAST) which is used to detect uncertainties in VLSI circuits. One challenge for test response compaction during FAST is the high and varying X-rate at the outputs of the circuit under test. By dividing the circuit outputs into test groups and separately compacting these test groups using stochastic compactors, the modular compaction is able to handle these high and varying X-rates.
To deal with uncertainties on logic interconnects, a method for distinguishing crosstalk and process variation is presented. In current semiconductor technologies, the number of parasitic coupling capacitances between logic interconnects is growing. These coupling capacitances can lead to crosstalk, which causes increased current flow in the logic interconnects, which in turn can lead to increased electromigration. In the presented method, delay maps describing the timing behavior of the circuit outputs at different operating points are used to train artificial neural networks which classify the tested circuits into fault-free and faulty.
AU - Sprenger, Alexander
ID - 46482
KW - Testantwortkompaktierung
KW - Prozessvariation
KW - Silicon Lifecycle Management
TI - Testinstrumente und Testdatenanalyse zur Verarbeitung von Unsicherheiten in Logikblöcken hochintegrierter Schaltungen
ER -
TY - CONF
AB - We present a miniaturized pulse shaping device that creates an arbitrary dispersion through the interaction of multiple metasurfaces on less than 2 mm3 volume. For this, a metalens and a grating-metasurface between two silver mirrors are fabricated. The grating contains further phase information to achieve the device's pulse shaping functionality.
AU - Geromel, René
AU - Georgi, Philip
AU - Protte, Maximilian
AU - Bartley, Tim
AU - Huang, Lingling
AU - Zentgraf, Thomas
ID - 46485
T2 - CLEO: Fundamental Science 2023
TI - Dispersion control with integrated plasmonic metasurfaces
ER -
TY - JOUR
AB - We present the fabrication of strain-free quantum dots in the In0.53Ga0.47As/In0.52Al0.48As-system lattice matched to InP, as future sources for single and entangled photons for long-haul fiber-based quantum communication in the optical C-band. We achieved these quantum dots by local droplet etching via InAl droplets in an In0.52Al0.48As layer and subsequent filling of the holes with In0.53Ga0.47As. Here, we present detailed investigations of the hole morphologies measured by atomic force microscopy. Statistical analysis of a set of nanoholes reveals a high degree of symmetry for nearly half of them when etched at optimized temperatures. Overgrowth with 50–150 nm In0.52Al0.48As increases their diameter and elongates the holes along the [01̄1]-direction. By systematically scanning the parameter space, we were able to fill the holes with In0.53Ga0.47As, and by capping the filled holes and performing photoluminescence measurements, we observe photoluminescence emission in the O-band up into the C-band depending on the filling height of the nanoholes.
AU - Deutsch, D.
AU - Buchholz, C.
AU - Zolatanosha, V.
AU - Jöns, K. D.
AU - Reuter, D.
ID - 44851
IS - 5
JF - AIP Advances
KW - General Physics and Astronomy
SN - 2158-3226
TI - Telecom C-band photon emission from (In,Ga)As quantum dots generated by filling nanoholes in In0.52Al0.48As layers
VL - 13
ER -
TY - JOUR
AU - Müller, Hendrik
AU - Weinberger, Christian
AU - Grundmeier, Guido
AU - de los Arcos de Pedro, Maria Teresa
ID - 46480
JF - Journal of Electron Spectroscopy and Related Phenomena
KW - Physical and Theoretical Chemistry
KW - Spectroscopy
KW - Condensed Matter Physics
KW - Atomic and Molecular Physics
KW - and Optics
KW - Radiation
KW - Electronic
KW - Optical and Magnetic Materials
SN - 0368-2048
TI - UV-enhanced environmental charge compensation in near ambient pressure XPS
VL - 264
ER -
TY - JOUR
AU - Pfeifer, Florian
AU - Knorr, Lukas
AU - Schlosser, Florian
AU - Marten, Thorsten
AU - Tröster, Thomas
ID - 46486
IS - 3
JF - Journal of Sustainable Development of Energy, Water and Environment Systems
KW - Energy Engineering and Power Technology
KW - Water Science and Technology
KW - Environmental Science (miscellaneous)
KW - Renewable Energy
KW - Sustainability and the Environment
SN - 1848-9257
TI - Ecological and Economic Feasibility of Inductive Heating for Sustainable Press Hardening Processes
VL - 11
ER -
TY - CONF
AU - Elsner, Julia
AU - Tenberge, Claudia
AU - Fechner, Sabine
ED - van Vorst, Helena
ID - 45371
T2 - Lernen, Lehren und Forschen in einer digital geprägten Welt
TI - Videoanalyse des Modellierprozesses von Grundschüler*innen
VL - 43
ER -
TY - GEN
AU - Kundisch, Dennis
ID - 46491
TI - #DIGITALENTS - Digital Talents Programm geht in die zweite Runde
VL - 1
ER -
TY - JOUR
AU - Kempkes, J. P.
AU - Kreuzhage, K.
AU - Kundisch, Dennis
AU - Seutter, Janina
AU - Weskamp, Christoph
ID - 45656
JF - Kultur Management Network Magazin
TI - Digitale Transformation im Theater – Mittels Besucherforschung und Entscheidungsunterstützung zur besseren Angebotsgestaltung
VL - 172
ER -
TY - CONF
AU - Gräßler, Iris
AU - Wiechel, Dominik
ID - 46502
T2 - 2023 18th Annual System of Systems Engineering Conference (SoSe)
TI - Customized impact analyses for technical engineering changes
ER -
TY - JOUR
AB -
Purpose
The purpose of this study is to investigate the manufacturability of Fe-3Si lattice structures and the resulting mechanical properties. This study could lead to the successful processing of squirrel cage conductors (a lattice structure by design) of an induction motor by additive manufacturing in the future.
Design/methodology/approach
The compression behaviour of two lattice structures where struts are arranged in a face-centred cubic position and vertical edges (FCCZ), and struts are placed at body-centred cubic (BCC) positions, prepared by laser powder bed fusion (LPBF), is explored. The experimental investigations are supported by finite element method (FEM) simulations.
Findings
The FCCZ lattice structure presents a peak in the stress-strain curve, whereas the BCC lattice structure manifests a plateau. The vertical struts aligned along the compression direction lead to a significant increase in the load-carrying ability of FCCZ lattice structures compared to BCC lattice structures. This results in a peak in the stress-strain curve. However, the BCC lattice structure presents the bending of struts with diagonal struts carrying the major loads with struts near the faceplate receiving the least load. A high concentration of geometrically necessary dislocations (GNDs) near the grain boundaries along cell formation is observed in the microstructure.
Originality/value
To the best of the authors’ knowledge, this is the first study on additive manufacturing of Fe-3Si lattice structures. Currently, there are no investigations in the literature on the manufacturability and mechanical properties of Fe-3Si lattice structures.
AU - Pramanik, Sudipta
AU - Hoyer, Kay-Peter
AU - Schaper, Mirko
ID - 46503
IS - 6
JF - Rapid Prototyping Journal
KW - Industrial and Manufacturing Engineering
KW - Mechanical Engineering
SN - 1355-2546
TI - Experimental and finite element method investigation on the compression behaviour of FCCZ and BCC lattice structures of additively manufactured Fe-3Si samples
VL - 29
ER -
TY - JOUR
AU - Pramanik, Sudipta
AU - Milaege, Dennis
AU - Hein, Maxwell
AU - Andreiev, Anatolii
AU - Schaper, Mirko
AU - Hoyer, Kay-Peter
ID - 46507
IS - 14
JF - Advanced Engineering Materials
KW - Condensed Matter Physics
KW - General Materials Science
SN - 1438-1656
TI - An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures
VL - 25
ER -
TY - GEN
AU - Andreiev, Anatolii
AU - Hoyer, Kay-Peter
AU - Hengsbach, Florian
AU - Haase, Michael
AU - Schaper, Mirko
ID - 46504
TI - Powder Bed Fusion of Soft-Magnetic Iron-Silicon-Based Alloys: Advantages and Challenges
ER -
TY - CONF
AB - Purpose: Data integration and applications across knowledge graphs (KGs) rely heavily on the discovery of links between resources within these KGs. Geospatial link discovery algorithms have to deal with millions of point sets containing billions of points.
Methodology: To speed up the discovery of geospatial links, we propose COBALT. COBALT combines the content measures with R-tree indexing. The content measures are based on the area, diagonal and distance of the minimum bounding boxes of the polygons which speeds up the process but is not perfectly accurate. We thus propose two polygon splitting approaches for improving the accuracy of COBALT.
Findings: Our experiments on real-world datasets show that COBALT is able to speed up the topological relation discovery over geospatial KGs by up to 1.47 × 104 times over state-of-the-art linking algorithms while maintaining an F-Measure between 0.7 and 0.9 depending on the relation. Furthermore, we were able to achieve an F-Measure of up to 0.99 by applying our polygon splitting approaches before applying the content measures.
Value: The process of discovering links between geospatial resources can be significantly faster by sacrificing the optimality of the results. This is especially important for real time data-driven applications such as emergency response, location-based services and traffic management. In future work, additional measures, like the location of polygons or the name of the entity represented by the polygon, could be integrated to further improve the accuracy of the results.
AU - Becker, Alexander
AU - Ahmed, Abdullah Fathi Ahmed
AU - Sherif, Mohamed
AU - Ngonga Ngomo, Axel-Cyrille
ID - 46514
KW - ahmed becker dice ngonga sail sherif
T2 - SEMANTiCS
TI - COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge Graphs
ER -
TY - JOUR
AU - Ahmed, Abdullah Fathi
AU - Sherif, Mohamed Ahmed
AU - Ngomo, Axel-Cyrille Ngonga
ID - 46517
JF - IEEE Access
KW - General Engineering
KW - General Materials Science
KW - General Computer Science
KW - Electrical and Electronic Engineering
SN - 2169-3536
TI - NELLIE: Never-Ending Linking for Linked Open Data
ER -