TY - GEN
AU - N., N.
ID - 46221
TI - Improving the End-of-Line Test of Custom-Built Geared Motors using Clustering based on Neural Networks
ER -
TY - JOUR
AU - Demir, Caglar
AU - Ngonga Ngomo, Axel-Cyrille
ID - 46243
JF - ECML-PKDD
TI - Clifford Embeddings – A Generalized Approach for Embedding in Normed Algebras
ER -
TY - JOUR
AU - Demir, Caglar
AU - Ngonga Ngomo, Axel-Cyrille
ID - 46251
JF - International Joint Conference on Artificial Intelligence
TI - Neuro-Symbolic Class Expression Learning
ER -
TY - JOUR
AU - Ma, Yulai
AU - Mattiolo, Davide
AU - Steffen, Eckhard
AU - Wolf, Isaak Hieronymus
ID - 46256
IS - 3
JF - SIAM Journal on Discrete Mathematics
KW - General Mathematics
SN - 0895-4801
TI - Pairwise Disjoint Perfect Matchings in r-Edge-Connected r-Regular Graphs
VL - 37
ER -
TY - CONF
AU - Meier, Jana
AU - Vogelsang, Christoph
AU - Küth, Simon
AU - Scholl , Daniel
AU - Watson, Christina
AU - Seifert, Andreas
ID - 46261
TI - Welche Rolle spielt eine reflexive Haltung für eine qualitätsvolle Unterrichtsreflexion? – Zusammenhänge zwischen einer quasi-experimentellen Einstellung und der Reflexionsperformanz von Lehramtsstudierenden [Einzelbeitrag].
ER -
TY - CONF
AU - Scholl, Daniel
AU - Küth, Simon
AU - Vogelsang, Christoph
AU - Meier, Jana
AU - Watson, Christina
AU - Seifert, Andreas
ID - 46262
TI - Das Unterrichtsplanungsprinzip der Interdependenz – Eine netzwerkanalytische Untersuchung der Begründungsstrukturen beim Planungsentscheiden [Einzelbeitrag].
ER -
TY - CONF
AU - Scholl, Daniel
AU - Vogelsang, Christoph
AU - Küth, Simon
AU - Meier, Jana
AU - Watson, Christina
AU - Seifert, Andreas
ID - 46263
TI - Eine reflexive Haltung als Grundlage einer hochwertigen Unterrichtsreflexion? Zusammenhänge zwischen einer quasi-experimentellen Einstellung zur Reflexion und der Reflexionsperformanz von Lehramtsstudierenden [Einzelbeitrag].
ER -
TY - GEN
ED - Meier, Jana
ED - Küth, Simon
ED - Scholl , Daniel
ED - Vogelsang, Christoph
ED - Watson, Christina
ID - 46260
TI - Der Zyklus von Planung und Reflexion. Zusammenhänge zwischen der generischen Unterrichtsplanungsfähigkeit und der Reflexionskompetenz angehender Lehrkräfte.
ER -
TY - CONF
AB - State-of-the-art LLC resonant converters use MOSFETs in their inverter stage, which allows high switching frequencies and thus the use of compact magnetic components. The large parasitic output capacitance and the poor reverse-recovery behaviour of the inherent body diode of high-voltage (600 V) silicon MOSFETs require soft switching, i.e. zero-voltage switching (ZVS). Otherwise, the high turn-on switching losses would lead to excessive heating and ultimately to the destruction of the switch. Therefore, MOSFET-based LLC converters are operated in the so-called inductive region only, which enables ZVS. The use of robust and cost-effective IGBTs instead of MOSFETs is particularly advantageous for automotive applications, since in addition to high reliability low costs are an important objective here. Since IGBTs are characterized by dominant turn-off losses and generally higher switching losses compared to MOSFETs, the aim is to operate them with zero-current switching (ZCS) and at low switching frequencies below the resonance frequency. In this region also the voltage transfer characteristic is steeper, which qualifies for applications with a strongly varying input-to-output voltage ratio, such as given for automotive on-board DC-DC converters connecting the (high-voltage) traction battery with the (12 V) auxiliary battery. In this paper, a stress value analysis based on a switched-model simulation is used to design a ZCS LLC converter and take advantage of the mentioned benefits of IGBTs as well as of the steeper voltage transfer characteristic. Within this operation region below the resonance frequency, however, a new phenomenon of several current pulses occurring during a single switching period through the rectifier components may appear. Generally, in applications with high output currents a synchronous rectifier (SR) is often used to keep the conduction losses of the rectifier stage at a moderate level: Low-voltage MOSFETs, which actively need to be gated synchronously to the polarity of the current pulses, are employed then instead of more lossy rectifier diodes. However, standard SR driver ICs have been shown to be unable to properly rectify the multi-pulse output currents of the proposed LLC operation, resulting in high conduction losses of the rectifier stage. A cost-effective hardware concept is presented which ensures proper rectification by using standard SR-ICs that are actively overdriven by the converter’s central microcontroller. A 2 kW prototype for an EV on-board DC-DC converter was built to show the effectiveness of the method, documenting an increase in efficiency by up to 4.1 % compared to a purely SR-IC-based solution. Overall efficiency is very similar to that of a conventional (MOSFET-based) LLC converter so that the ZCS-operated LLC IGBT-converter represents a cost-effective alternative, which even shows 10 % less worst-case losses.
AU - Urbaneck, Daniel
AU - Schafmeister, Frank
AU - Böcker, Joachim
ID - 46269
KW - LLC Converter
KW - IGBT
KW - ZCS
KW - Synchronous Rectification
T2 - PCIM Europe 2023
TI - Advanced Synchronous Rectification for an IGBT-Based ZCS LLC Converter with High Output Currents for a 2 kW Automotive DC-DC Stage
ER -
TY - CONF
AB - The computation of electron repulsion integrals (ERIs) over Gaussian-type orbitals (GTOs) is a challenging problem in quantum-mechanics-based atomistic simulations. In practical simulations, several trillions of ERIs may have to be
computed for every time step.
In this work, we investigate FPGAs as accelerators for the ERI computation. We use template parameters, here within the Intel oneAPI tool flow, to create customized designs for 256 different ERI quartet classes, based on their orbitals. To maximize data reuse, all intermediates are buffered in FPGA on-chip memory with customized layout. The pre-calculation of intermediates also helps to overcome data dependencies caused by multi-dimensional recurrence
relations. The involved loop structures are partially or even fully unrolled for high throughput of FPGA kernels. Furthermore, a lossy compression algorithm utilizing arbitrary bitwidth integers is integrated in the FPGA kernels. To our
best knowledge, this is the first work on ERI computation on FPGAs that supports more than just the single most basic quartet class. Also, the integration of ERI computation and compression it a novelty that is not even covered by CPU or GPU libraries so far.
Our evaluation shows that using 16-bit integer for the ERI compression, the fastest FPGA kernels exceed the performance of 10 GERIS ($10 \times 10^9$ ERIs per second) on one Intel Stratix 10 GX 2800 FPGA, with maximum absolute errors around $10^{-7}$ - $10^{-5}$ Hartree. The measured throughput can be accurately explained by a performance model. The FPGA kernels deployed on 2 FPGAs outperform similar computations using the widely used libint reference on a two-socket server with 40 Xeon Gold 6148 CPU cores of the same process technology by factors up to 6.0x and on a new two-socket server with 128 EPYC 7713 CPU cores by up to 1.9x.
AU - Wu, Xin
AU - Kenter, Tobias
AU - Schade, Robert
AU - Kühne, Thomas
AU - Plessl, Christian
ID - 43228
T2 - 2023 IEEE 31st Annual International Symposium on Field-Programmable Custom Computing Machines (FCCM)
TI - Computing and Compressing Electron Repulsion Integrals on FPGAs
ER -
TY - JOUR
AB - The non-orthogonal local submatrix method applied to electronic structure–based molecular dynamics simulations is shown to exceed 1.1 EFLOP/s in FP16/FP32-mixed floating-point arithmetic when using 4400 NVIDIA A100 GPUs of the Perlmutter system. This is enabled by a modification of the original method that pushes the sustained fraction of the peak performance to about 80%. Example calculations are performed for SARS-CoV-2 spike proteins with up to 83 million atoms.
AU - Schade, Robert
AU - Kenter, Tobias
AU - Elgabarty, Hossam
AU - Lass, Michael
AU - Kühne, Thomas
AU - Plessl, Christian
ID - 45361
JF - The International Journal of High Performance Computing Applications
KW - Hardware and Architecture
KW - Theoretical Computer Science
KW - Software
SN - 1094-3420
TI - Breaking the exascale barrier for the electronic structure problem in ab-initio molecular dynamics
ER -
TY - JOUR
AB - Site-controlled Ga droplets on AlGaAs substrates are fabricated using area-selective deposition of Ga through apertures in a mask during molecular beam epitaxy (MBE). The Ga droplets can be crystallized into GaAs quantum dots using a crystallization step under As flux. In order to model the complex process, including the masked deposition of the droplets and a reduction of their number during a thermal annealing step, a multiscale kinetic Monte Carlo (mkMC) simulation of self-assembled Ga droplet formation on AlGaAs is expanded for area-selective deposition. The simulation has only two free model parameters: the activation energy for surface diffusion and the activation energy for thermal escape of adatoms from a droplet. Simulated droplet numbers within the opening of the aperture agree quantitatively with the experimental results down to the perfect site-control, with one droplet per aperture. However, the model parameters are different compared to those of the self-assembled droplet growth. We attribute this to the presence of the mask in close proximity to the surface, which modifies the local process temperature and the As background. This approach also explains the dependence of the model parameters on the size of the aperture.
AU - Feddersen, Stefan
AU - Zolatanosha, Viktoryia
AU - Alshaikh, Ahmed
AU - Reuter, Dirk
AU - Heyn, Christian
ID - 46278
IS - 3
JF - Nanomaterials
KW - General Materials Science
KW - General Chemical Engineering
SN - 2079-4991
TI - Modeling of Masked Droplet Deposition for Site-Controlled Ga Droplets
VL - 13
ER -
TY - JOUR
AU - Sieland, Benedikt
AU - Stahn, Marcel
AU - Schoch, Roland
AU - Daniliuc, Constantin
AU - Spicher, Sebastian
AU - Grimme, Stefan
AU - Hansen, Andreas
AU - Paradies, Jan
ID - 46277
JF - Angewandte Chemie International Edition
KW - General Chemistry
KW - Catalysis
SN - 1433-7851
TI - Dispersion Energy‐Stabilized Boron and Phosphorus Lewis Pairs
ER -
TY - CONF
AU - Clausing, Lennart
AU - Guetattfi, Zakarya
AU - Kaufmann, Paul
AU - Lienen, Christian
AU - Platzner, Marco
ID - 45913
T2 - Proceedings of the 19th International Symposium on Applied Reconfigurable Computing (ARC)
TI - On Guaranteeing Schedulability of Periodic Real-time Hardware Tasks under ReconOS64
ER -
TY - CHAP
AU - Tophinke, Doris
ED - Feilke, Helmuth
ID - 46099
T2 - Zwischen Fake und Fakt
TI - "Tankrabatt" und "Freiheitsenergie". Wie der Blog "neusprech.org" politische Euphemismen entlarvt
VL - 300
ER -
TY - JOUR
AU - Merten, Marie-Luis
AU - Wever, Marcel
AU - Tophinke, Doris
AU - Geierhos, Michaela
AU - Hüllermeier, Eyke
ID - 45673
JF - International Journal of Corpus Linguistics
TI - Annotation uncertainty in the context of grammatical change
ER -
TY - THES
AU - Tornede, Alexander
ID - 45780
TI - Advanced Algorithm Selection with Machine Learning: Handling Large Algorithm Sets, Learning From Censored Data, and Simplyfing Meta Level Decisions
ER -
TY - THES
AU - Spiess-Bru, Clarissa
ID - 46296
TI - Information Asymmetry and Gendered Behavior in Organizations and Digital Markets
ER -
TY - CONF
AB - A frequency-flexible Nyquist pulse synthesizer is presented with optical pulse bandwidths up to fopt=100 GHz and repetition rates equal to fopt/9, fabricated in an electronic-photonic co-integrated platform utilizing linear on-chip drivers.
AU - Kress, Christian
AU - Schwabe, Tobias
AU - Silberhorn, Christine
AU - Scheytt, J. Christoph
ID - 45578
T2 - Conference on Lasers and Electro-Optics (CLEO) 2023
TI - Generation of 100 GHz Periodic Nyquist Pulses using Cascaded Mach-Zehnder Modulators in a Silicon Electronic-Photonic Platform
ER -
TY - JOUR
AU - Homt, Martina
AU - Bloh, Bea
ID - 46354
IS - 1
JF - Lehrerbildung auf dem Prüfstand
TI - Der formelle Diskurs Forschenden Lernens in der Lehrerbildung. Ein Blick zurück nach vorn
VL - 16
ER -
TY - CHAP
AU - Ksouri-Gerwien, Christoph
AU - Vorbohle, Christian
ED - Schallmo, D.R.A.
ED - Kundisch, Dennis
ED - Lang, K.
ID - 37704
T2 - Digitale Plattformen und Ökosysteme im B2B-Bereich
TI - Anwendung von System Dynamics zur Geschäftsmodellinnovation in einem B2B-Ökosystem
ER -
TY - CONF
AB - Effect chain modelling is a method for creating information
models for impact analyses of changes in system elements. For
the estimation of change propagation, dependencies between
requirements must be detected. The high number of require-
ment dependencies in the engineering of complex technical
systems results in the need for automation. In a study, it was
shown that transformer models (BERT) are suitable for the
automated dependency analysis of requirements. However,
there are currently deficits in the applicability of the models
for different projects without an extensive and heterogeneous
training database. This paper investigates how active learning
can be used to train BERT models (active-BERT) in order to
increase the performance of the models for classifying requi-
rement dependencies of projects with heterogeneous require-
ments. The results show that the performance of the models
increases significantly through active learning. Through active-
BERT, engineers are enabled to model effect chains efficiently
and to handle requirement changes effectively.
AU - Gräßler, Iris
AU - Preuß, Daniel
ED - Hölzle, Katharina
ED - Kreimeyer, Matthias
ED - Roth, Daniel
ED - Maier, Thomas
ED - Riedel, Oliver
ID - 45661
SN - 2364-4885
T2 - Stuttgarter Symposium für Produktentwicklung SSP 2023
TI - Automatisierte Abhängigkeitsanalyse von Anforderungen zur Wirkkettenmodellierung
ER -
TY - BOOK
AU - Fuchs, Christian
ID - 42949
SN - 9781032362724
TI - Digital Democracy and the Digital Public Sphere
VL - 6
ER -
TY - GEN
AB - Effective photoinduced charge transfer makes molecular bimetallic assemblies attractive for applications as active light induced proton reduction systems. For a more sustainable future, development of competitive base metal dyads is mandatory. However, the electron transfer mechanisms from the photosensitizer to the proton reduction catalyst in base metal dyads remain so far unexplored. We study a Fe-Co dyad that exhibits photocatalytic H2 production activity using femtosecond X-ray emission spectroscopy, complemented by ultrafast optical spectroscopy and theoretical time-dependent DFT calculations, to understand the electronic and structural dynamics after photoexcitation and during the subsequent charge transfer process from the FeII photosensitizer to the cobaloxime catalyst. Using this novel approach, the simultaneous measurement of the transient Kalpha X-ray emission at the iron and cobalt K-edges in a two-colour experiment is enabled making it possible to correlate the excited state dynamics to the electron transfer processes. The methodology, therefore, provides a clear and direct spectroscopic evidence of the Fe->Co electron transfer responsible for the proton reduction activity.
AU - Nowakowski, Michał
AU - Huber-Gedert, Marina
AU - Elgabarty, Hossam
AU - Kubicki, Jacek
AU - Kertem, Ahmet
AU - Lindner, Natalia
AU - Khakhulin, Dimitry
AU - Lima, Frederico Alves
AU - Choi, Tae-Kyu
AU - Biednov, Mykola
AU - Piergies, Natalia
AU - Zalden, Peter
AU - Kubicek, Katerina
AU - Rodriguez-Fernandez, Angel
AU - Salem, Mohammad Alaraby
AU - Kühne, Thomas
AU - Gawelda, Wojciech
AU - Bauer, Matthias
ID - 40982
T2 - arxiv
TI - Ultrafast two-colour X-ray emission spectroscopy reveals excited state landscape in a base metal dyad
ER -
TY - CONF
AB - The article shows how to learn models of dynamical systems from data which are governed by an unknown variational PDE. Rather than employing reduction techniques, we learn a discrete field theory governed by a discrete Lagrangian density $L_d$ that is modelled as a neural network. Careful regularisation of the loss function for training $L_d$ is necessary to obtain a field theory that is suitable for numerical computations: we derive a regularisation term which optimises the solvability of the discrete Euler--Lagrange equations. Secondly, we develop a method to find solutions to machine learned discrete field theories which constitute travelling waves of the underlying continuous PDE.
AU - Offen, Christian
AU - Ober-Blöbaum, Sina
ED - Nielsen, F
ED - Barbaresco, F
ID - 42163
KW - System identification
KW - discrete Lagrangians
KW - travelling waves
T2 - Geometric Science of Information
TI - Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves
VL - 14071
ER -
TY - JOUR
AB - The principle of least action is one of the most fundamental physical principle. It says that among all possible motions connecting two points in a phase space, the system will exhibit those motions which extremise an action functional. Many qualitative features of dynamical systems, such as the presence of conservation laws and energy balance equations, are related to the existence of an action functional. Incorporating variational structure into learning algorithms for dynamical systems is, therefore, crucial in order to make sure that the learned model shares important features with the exact physical system. In this paper we show how to incorporate variational principles into trajectory predictions of learned dynamical systems. The novelty of this work is that (1) our technique relies only on discrete position data of observed trajectories. Velocities or conjugate momenta do not need to be observed or approximated and no prior knowledge about the form of the variational principle is assumed. Instead, they are recovered using backward error analysis. (2) Moreover, our technique compensates discretisation errors when trajectories are computed from the learned system. This is important when moderate to large step-sizes are used and high accuracy is required. For this,
we introduce and rigorously analyse the concept of inverse modified Lagrangians by developing an inverse version of variational backward error analysis. (3) Finally, we introduce a method to perform system identification from position observations only, based on variational backward error analysis.
AU - Ober-Blöbaum, Sina
AU - Offen, Christian
ID - 29240
JF - Journal of Computational and Applied Mathematics
KW - Lagrangian learning
KW - variational backward error analysis
KW - modified Lagrangian
KW - variational integrators
KW - physics informed learning
SN - 0377-0427
TI - Variational Learning of Euler–Lagrange Dynamics from Data
VL - 421
ER -
TY - JOUR
AB - The numerical solution of an ordinary differential equation can be interpreted as the exact solution of a nearby modified equation. Investigating the behaviour of numerical solutions by analysing the modified equation is known as backward error analysis. If the original and modified equation share structural properties, then the exact and approximate solution share geometric features such as the existence of conserved quantities. Conjugate symplectic methods preserve a modified symplectic form and a modified Hamiltonian when applied to a Hamiltonian system. We show how a blended version of variational and symplectic techniques can be used to compute modified symplectic and Hamiltonian structures. In contrast to other approaches, our backward error analysis method does not rely on an ansatz but computes the structures systematically, provided that a variational formulation of the method is known. The technique is illustrated on the example of symmetric linear multistep methods with matrix coefficients.
AU - McLachlan, Robert
AU - Offen, Christian
ID - 29236
IS - 1
JF - Journal of Geometric Mechanics
KW - variational integrators
KW - backward error analysis
KW - Euler--Lagrange equations
KW - multistep methods
KW - conjugate symplectic methods
TI - Backward error analysis for conjugate symplectic methods
VL - 15
ER -
TY - JOUR
AB - Recently, Hamiltonian neural networks (HNN) have been introduced to incorporate prior physical knowledge when
learning the dynamical equations of Hamiltonian systems. Hereby, the symplectic system structure is preserved despite
the data-driven modeling approach. However, preserving symmetries requires additional attention. In this research, we
enhance the HNN with a Lie algebra framework to detect and embed symmetries in the neural network. This approach
allows to simultaneously learn the symmetry group action and the total energy of the system. As illustrating examples,
a pendulum on a cart and a two-body problem from astrodynamics are considered.
AU - Dierkes, Eva
AU - Offen, Christian
AU - Ober-Blöbaum, Sina
AU - Flaßkamp, Kathrin
ID - 37654
IS - 6
JF - Chaos
SN - 1054-1500
TI - Hamiltonian Neural Networks with Automatic Symmetry Detection
VL - 33
ER -
TY - CHAP
AU - Dehmel, Lukas
ED - Kondratjuk, Maria
ID - 46473
T2 - Grundlagen der Erwachsenen- und Weiterbildungsforschung
TI - 6.3.2 Medienpädagogische Professionalisierung in der beruflichen Weiterbildung. Eine Studie aus Perspektive der biografischen Medienforschung. Steckbrief zur Dissertation.
ER -
TY - JOUR
AU - Unterstell, Rembert
ID - 46471
IS - 1
JF - german research – Magazine of the Deutsche Forschungsgemeinschaft
TI - „Allowing the Economy to Breathe Even During the Crisis“ – Interview with Tax Expert Caren Sureth-Sloane
ER -
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 -
TY - CHAP
AB - Linked knowledge graphs build the backbone of many data-driven applications such as search engines, conversational agents and e-commerce solutions. Declarative link discovery frameworks use complex link specifications to express the conditions under which a link between two resources can be deemed to exist. However, understanding such complex link specifications is a challenging task for non-expert users of link discovery frameworks. In this paper, we address this drawback by devising NMV-LS, a language model-based verbalization approach for translating complex link specifications into natural language. NMV-LS relies on the results of rule-based link specification verbalization to apply continuous training on T5, a large language model based on the Transformerarchitecture. We evaluated NMV-LS on English and German datasets using well-known machine translation metrics such as BLUE, METEOR, ChrF++ and TER. Our results suggest that our approach achieves a verbalization performance close to that of humans and outperforms state of the art approaches. Our source code and datasets are publicly available at https://github.com/dice-group/NMV-LS.
AU - Ahmed, Abdullah Fathi Ahmed
AU - Firmansyah, Asep Fajar
AU - Sherif, Mohamed
AU - Moussallem, Diego
AU - Ngonga Ngomo, Axel-Cyrille
ID - 46516
SN - 0302-9743
T2 - Natural Language Processing and Information Systems
TI - Explainable Integration of Knowledge Graphs Using Large Language Models
ER -
TY - CONF
AU - Vogelsang, Christoph
AU - Janzen, Thomas
AU - Meier, Jana
AU - Wotschel, Philipp
ID - 46522
TI - „Die Prüfungen werden mich sicherlich nicht zu einer besseren Lehrkraft machen.“ Wie beurteilen Studierende Prüfungen und Feedback im Lehramtsstudium?
ER -
TY - CONF
AU - Wotschel, Philipp
AU - Vogelsang, Christoph
AU - Janzen, Thomas
AU - Meier, Jana
ID - 46524
TI - Als Lehrkraft gut beraten? Entwicklung und Erprobung eines handlungsnahen Prüfungsformates zur Erfassung von Beratungskompetenz von Lehramtsstudierenden
ER -
TY - CONF
AB - Purpose: This study addresses the limitations of current short abstracts of DBpedia entities, which often lack a comprehensive overview due to their creating method (i.e., selecting the first two-three sentences from the full DBpedia abstracts).
Methodology: We leverage pre-trained language models to generate abstractive summaries of DBpedia abstracts in six languages (English, French, German, Italian, Spanish, and Dutch). We performed several experiments to assess the quality of generated summaries by language models. In particular, we evaluated the generated summaries using human judgments and automated metrics (Self-ROUGE and BERTScore). Additionally, we studied the correlation between human judgments and automated metrics in evaluating the generated summaries under different aspects: informativeness, coherence, conciseness, and fluency.
Findings: Pre-trained language models generate summaries more concise and informative than existing short abstracts. Specifically, BART-based models effectively overcome the limitations of DBpedia short abstracts, especially for longer ones.
Moreover, we show that BERTScore and ROUGE-1 are reliable metrics for assessing the informativeness and coherence of the generated summaries with respect to the full DBpedia abstracts. We also find a negative correlation between conciseness and human ratings. Furthermore, fluency evaluation remains challenging without human judgment.
Value: This study has significant implications for various applications in machine learning and natural language processing that rely on DBpedia resources. By providing succinct and comprehensive summaries, our approach enhances the quality of DBpedia abstracts and contributes to the semantic web community
AU - Zahera, Hamada Mohamed Abdelsamee
AU - Vitiugin, Fedor
AU - Sherif, Mohamed
AU - Castillo, Carlos
AU - Ngonga Ngomo, Axel-Cyrille
ID - 46518
KW - dice enexa kiam ngonga porque sherif zahera
T2 - SEMANTiCS
TI - Using Pre-trained Language Models for Abstractive DBpedia Summarization: A Comparative Study
ER -
TY - DATA
AB - Graffiti is an urban phenomenon that is increasingly attracting the interest of the sciences. To the best of our knowledge, no suitable data corpora are available for systematic research until now. The Information System Graffiti in Germany project (Ingrid) closes this gap by dealing with graffiti image collections that have been made available to the project for public use. Within Ingrid, the graffiti images are collected, digitized and annotated. With this work, we aim to support the rapid access to a comprehensive data source on Ingrid targeted especially by researchers. In particular, we present IngridKG, an RDF knowledge graph of annotated graffiti, abides by the Linked Data and FAIR principles. We weekly update IngridKG by augmenting the new annotated graffiti to our knowledge graph. Our generation pipeline applies RDF data conversion, link discovery and data fusion approaches to the original data. The current version of IngridKG contains 460,640,154 triples and is linked to 3 other knowledge graphs by over 200,000 links. In our use case studies, we demonstrate the usefulness of our knowledge graph for different applications.
AU - Sherif, Mohamed
AU - Morim da Silva, Ana Alexandra
AU - Pestryakova, Svetlana
AU - Ahmed, Abdullah Fathi Ahmed
AU - Niemann, Sven
AU - Ngonga Ngomo, Axel-Cyrille
ID - 45558
TI - IngridKG: A FAIR Knowledge Graph of Graffiti
ER -
TY - JOUR
AB - Multiprotein adsorption from complex body fluids represents a highly important and complicated phenomenon in medicine. In this work, multiprotein adsorption from diluted human serum at gold and oxidized iron surfaces is investigated at different serum concentrations and pH values. Adsorption-induced changes in surface topography and the total amount of adsorbed proteins are quantified by atomic force microscopy (AFM) and polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS), respectively. For both surfaces, stronger protein adsorption is observed at pH 6 compared to pH 7 and pH 8. PM-IRRAS furthermore provides some qualitative insights into the pH-dependent alterations in the composition of the adsorbed multiprotein films. Changes in the amide II/amide I band area ratio and in particular side-chain IR absorption suggest that the increased adsorption at pH 6 is accompanied by a change in protein film composition. Presumably, this is mostly driven by the adsorption of human serum albumin, which at pH 6 adsorbs more readily and thereby replaces other proteins with lower surface affinities in the resulting multiprotein film.
AU - Huang, Jingyuan
AU - Qiu, Yunshu
AU - Lücke, Felix
AU - Su, Jiangling
AU - Grundmeier, Guido
AU - Keller, Adrian
ID - 46542
IS - 16
JF - Molecules
KW - Chemistry (miscellaneous)
KW - Analytical Chemistry
KW - Organic Chemistry
KW - Physical and Theoretical Chemistry
KW - Molecular Medicine
KW - Drug Discovery
KW - Pharmaceutical Science
SN - 1420-3049
TI - Multiprotein Adsorption from Human Serum at Gold and Oxidized Iron Surfaces Studied by Atomic Force Microscopy and Polarization-Modulation Infrared Reflection Absorption Spectroscopy
VL - 28
ER -
TY - JOUR
AB - The influence of nanoscale surface topography on protein adsorption is highly important for numerous applications in medicine and technology. Herein, ferritin adsorption at flat and nanofaceted, single-crystalline Al2O3 surfaces is investigated using atomic force microscopy and X-ray photoelectron spectroscopy. The nanofaceted surfaces are generated by the thermal annealing of Al2O3 wafers at temperatures above 1000 °C, which leads to the formation of faceted saw-tooth-like surface topographies with periodicities of about 160 nm and amplitudes of about 15 nm. Ferritin adsorption at these nanofaceted surfaces is notably suppressed compared to the flat surface at a concentration of 10 mg/mL, which is attributed to lower adsorption affinities of the newly formed facets. Consequently, adsorption is restricted mostly to the pattern grooves, where the proteins can maximize their contact area with the surface. However, this effect depends on the protein concentration, with an inverse trend being observed at 30 mg/mL. Furthermore, different ferritin adsorption behavior is observed at topographically similar nanofacet patterns fabricated at different annealing temperatures and attributed to different step and kink densities. These results demonstrate that while protein adsorption at solid surfaces can be notably affected by nanofacet patterns, fine-tuning protein adsorption in this way requires the precise control of facet properties.
AU - Pothineni, Bhanu K.
AU - Kollmann, Sabrina
AU - Li, Xinyang
AU - Grundmeier, Guido
AU - Erb, Denise J.
AU - Keller, Adrian
ID - 46543
IS - 16
JF - International Journal of Molecular Sciences
KW - Inorganic Chemistry
KW - Organic Chemistry
KW - Physical and Theoretical Chemistry
KW - Computer Science Applications
KW - Spectroscopy
KW - Molecular Biology
KW - General Medicine
KW - Catalysis
SN - 1422-0067
TI - Adsorption of Ferritin at Nanofaceted Al2O3 Surfaces
VL - 24
ER -
TY - CONF
AU - Kouagou, N’Dah Jean
AU - Heindorf, Stefan
AU - Demir, Caglar
AU - Ngomo, Axel-Cyrille Ngonga
ID - 46459
T2 - NeSy
TI - Neural Class Expression Synthesis (Extended Abstract)
VL - 3432
ER -
TY - CHAP
AB - Indonesian is classified as underrepresented in the Natural Language Processing (NLP) field, despite being the tenth most spoken language in the world with 198 million speakers. The paucity of datasets is recognized as the main reason for the slow advancements in NLP research for underrepresented languages. Significant attempts were made in 2020 to address this drawback for Indonesian. The Indonesian Natural Language Understanding (IndoNLU) benchmark was introduced alongside IndoBERT pre-trained language model. The second benchmark, Indonesian Language Evaluation Montage (IndoLEM), was presented in the same year. These benchmarks support several tasks, including Named Entity Recognition (NER). However, all NER datasets are in the public domain and do not contain domain-specific datasets. To alleviate this drawback, we introduce IndQNER, a manually annotated NER benchmark dataset in the religious domain that adheres to a meticulously designed annotation guideline. Since Indonesia has the world’s largest Muslim population, we build the dataset from the Indonesian translation of the Quran. The dataset includes 2475 named entities representing 18 different classes. To assess the annotation quality of IndQNER, we perform experiments with BiLSTM and CRF-based NER, as well as IndoBERT fine-tuning. The results reveal that the first model outperforms the second model achieving 0.98 F1 points. This outcome indicates that IndQNER may be an acceptable evaluation metric for Indonesian NER tasks in the aforementioned domain, widening the research’s domain range.
AU - Gusmita, Ria Hari
AU - Firmansyah, Asep Fajar
AU - Moussallem, Diego
AU - Ngonga Ngomo, Axel-Cyrille
ID - 46572
SN - 0302-9743
T2 - Natural Language Processing and Information Systems
TI - IndQNER: Named Entity Recognition Benchmark Dataset from the Indonesian Translation of the Quran
ER -
TY - JOUR
AB - AbstractExternal visualization (i.e., physically embodied visualization) is central to the teaching and learning of mathematics. As external visualization is an important part of mathematics at all levels of education, it is diverse, and research on external visualization has become a wide and complex field. The aim of this scoping review is to characterize external visualizations in recent mathematics education research in order to develop a common ground and guide future research. A qualitative content analysis of the full texts of 130 studies published between 2018 and 2022 applied a deductive-inductive coding procedure to assess four dimensions: visualization product or process, type of visualization, media, and purpose. The analysis revealed different types of external visualizations including visualizations with physical resemblance ranging from pictorial to abstract visualizations as well as three types of visualizations with structural resemblance: length, area, and relational visualizations. Future research should include measures of visualization products or processes to help explain the demands and affordances that different types of visualizations present to learners and teachers.
AU - Schoenherr, Johanna
AU - Schukajlow, Stanislaw
ID - 46569
JF - ZDM – Mathematics Education
KW - General Mathematics
KW - Education
SN - 1863-9690
TI - Characterizing external visualization in mathematics education research: a scoping review
ER -
TY - CHAP
AU - Vochatzer, Stefanie
ED - Bentz , Julia
ID - 46560
T2 - Creative Approaches to Climate and Peace Education. An Educationr’s Guide to Using Storytelling and Art
TI - My first contact with the Foodsharing Initiative
ER -
TY - GEN
AB - We study the effect of education on health (hospital stays, number of diagnosed conditions, self-rated poor health, and obesity) over the life-cycle in Germany, using compulsory schooling reforms as a source of exogenous variation. Our results suggest a positive correlation of health and education which increases over the life-cycle. We do not, however, find any positive local average treatment effects of an additional year of schooling on health or health care utilization for individuals up to age 79. An exception is obesity, where positive effects of schooling start to be visible around age 60 and become very large in age group 75-79. The results in age group 75-79 need to be interpreted with caution, however, due to small sample size and possible problems of attrition.
AU - Schmitz, Hendrik
AU - Tawiah, Beatrice Baaba
ID - 46534
KW - Education
KW - health
KW - life-cycle effects
KW - compulsory schooling
TI - Life-cycle health effects of compulsory schooling
VL - 1006
ER -
TY - CONF
AU - Baci, Alkid
AU - Heindorf, Stefan
ID - 46575
T2 - CIKM
TI - Accelerating Concept Learning via Sampling
ER -
TY - GEN
AU - Freise, Diana
AU - Schiele, Valentin
AU - Schmitz, Hendrik
ID - 46521
KW - General Earth and Planetary Sciences
KW - General Environmental Science
SN - 1556-5068
TI - Housing Situations and Local COVID-19 Infection Dynamics – A Case Study With Small-Area Data
ER -
TY - GEN
AB - The Koopman operator has become an essential tool for data-driven analysis, prediction and control of complex systems, the main reason being the enormous potential of identifying linear function space representations of nonlinear
dynamics from measurements. Until now, the situation where for large-scale systems, we (i) only have access to partial observations (i.e., measurements, as is very common for experimental data) or (ii) deliberately perform coarse
graining (for efficiency reasons) has not been treated to its full extent. In this paper, we address the pitfall associated with this situation, that the classical EDMD algorithm does not automatically provide a Koopman operator approximation for the underlying system if we do not carefully select the number of observables. Moreover, we show that symmetries in the system dynamics can be carried over to the Koopman operator, which allows us to massively increase the model efficiency. We also briefly draw a connection to domain decomposition techniques for partial differential equations and present numerical evidence using the Kuramoto--Sivashinsky equation.
AU - Peitz, Sebastian
AU - Harder, Hans
AU - Nüske, Feliks
AU - Philipp, Friedrich
AU - Schaller, Manuel
AU - Worthmann, Karl
ID - 46579
T2 - arXiv:2307.15325
TI - Partial observations, coarse graining and equivariance in Koopman operator theory for large-scale dynamical systems
ER -
TY - GEN
AB - We study the effect of education on vaccination against COVID-19 and influenza in Germany and Europe. Our identification strategy makes use of changes in compulsory schooling laws and allows to estimate local average treatment effects for individuals between 59 and 91 years of age. We find no significant effect of an additional year of schooling on vaccination status in Germany. Pooling data from Europe, we conclude that schooling increases the likelihood to vaccinate against COVID by an economically negligible effect of one percentage point (zero for influenza). However, we find indications that additional schooling increases fear of side effects from COVID vaccination.
AU - Monsees, Daniel
AU - Schmitz, Hendrik
ID - 46536
KW - COVID
KW - influenza
KW - vaccination
KW - education
KW - compulsory schooling
TI - The effect of compulsory schooling on vaccination against COVID and Influenza
VL - 1011
ER -
TY - CONF
AB - One of the main challenges for next generation automotive radars is the improvement of angular resolution to a sub-degree level. In this context, wide aperture automotive radars of 1m length or more and resolution close to 0.1° in azimuth and 0.5° in elevation could be beneficial. To enable coherent processing of arrays with such large aperture, prior (i.e offline) and online calibration are necessary: channel imbalances (gains and phases) and three dimensional coordinates of transmit and receive elements need to be determined. We propose a calibration strategy based on alternating steps between the two subtasks of i) channel imbalance estimation with ‘known’ array positions, by applying a singular value decomposition to the resulting tensor calculus problem; and ii) antenna position estimation with ’known’ channel imbalances, by numerically maximizing the Bayesian posterior probability; in both cases operating on range/Doppler snapshots of disjoint targets (with potentially unknown locations). Simulation studies based on the parameters of a MIMO 8x6 linear sparse array show promising results as long as the initial position errors do not exceed half a wavelength (2mm), beyond which we observe strong effects of ambiguity. Experimental results with real measurements show that after calibration in laboratory conditions, our MIMO 8x6 demonstrator with 50cm aperture is able to resolve two targets at the same range with angular separation at least as close as 0.4°.
AU - Greiff, Christian
AU - Mateos-Núñez, David
AU - Simoni, Renato
AU - González-Huici, Maria
AU - Kruse, Stephan
AU - Scheytt, J. Christoph
AU - Kolk, Karl
AU - Höller, Christian
AU - Kurz, Heiko Gustav
AU - Meinecke, Marc-Michael
AU - Gisder, Thomas
ID - 46426
T2 - 2023 24th International Radar Symposium (IRS)
TI - Calibration of Large Coherent MIMO Radar Arrays: Channel Imbalances and 3D Antenna Positions
ER -
TY - GEN
AU - Ostermann, Moritz
AU - Behm, Jonathan
AU - Marten, Thorsten
AU - Tröster, Thomas
ID - 42459
T2 - WerkstoffPlus Auto 13. Fachtagung für neue Fahrzeug- und Werkstoffkonzepte
TI - NeMo.bil - Dekarbonisierung des Verkehrs mithilfe von Leichtbau-Fahrzeugschwärmen
ER -
TY - JOUR
AU - Kaur, Mannat
AU - Ramulu, Harshini Sri
AU - Acar, Yasemin
AU - Fiebig, Tobias
ID - 45984
IS - CSCW1
JF - Proc. ACM Hum. Comput. Interact.
TI - "Oh yes! over-preparing for meetings is my jam :)": The Gendered Experiences of System Administrators
VL - 7
ER -
TY - JOUR
AU - Bouma-Sims, Elijah
AU - Acar, Yasemin
ID - 45983
IS - CSCW1
JF - Proc. ACM Hum. Comput. Interact.
TI - Beyond the Boolean: How Programmers Ask About, Use, and Discuss Gender
VL - 7
ER -
TY - JOUR
AU - Vöing, Nerea
ID - 46622
JF - Lehren im Leben - Blog der Stiftung Innovation in der Hochschullehre
TI - 16 Fragen, 16 Antworten: In unserer Rubrik „Lehren im Leben” stellen wir Menschen vor, die Hochschullehre gestalten. Folge 6: Dr. Nerea Vöing
VL - 6
ER -
TY - GEN
AB - We discuss in which cases the Dunkl convolution of distributions, possibly
both with non-compact support, can be defined and study its analytic
properties. We prove results on the (singular-)support of Dunkl convolutions.
Based on this, we are able to prove a theorem on elliptic regularity for a
certain class of Dunkl operators, called elliptic Dunkl operators. Finally, for
the root systems of type A we consider the Dunkl-type Riesz distributions,
prove that their Dunkl convolution exists and compute their convolution.
AU - Brennecken, Dominik
ID - 46614
T2 - arXiv:2308.07710
TI - Dunkl convolution and elliptic regularity for Dunkl operators
ER -
TY - JOUR
AU - Vöing, Nerea
ID - 46623
JF - Trafohaus//Lehre (Podcast der HD Sachsen)
TI - Ein Blick auf Lehre und Lernen in Hochschulen durch die Brille der Hochschuldidaktik"
ER -
TY - GEN
AU - Vöing, Nerea
AU - Arnold, Maik
AU - Reisas, Sabine
ID - 46624
TI - Lehrentwicklung durch Scholarship of Teaching and Learning – mit SoTL Hochschullehre beforschen, weiterentwickeln und teilen
ER -
TY - JOUR
AU - Karakaya, Yasin
AU - Somnitz, H.
AU - Hermsen, A.
AU - Gonchikzhapov, Munko
AU - Kasper, Tina
ID - 45602
JF - Applications in Energy and Combustion Science
KW - Metastable particles
KW - Nanomaterials
KW - Quartz-crystal-microbalance
KW - Molecular-beam mass spectrometry
KW - Tetramethylsilane
KW - Reaction kinetics
SN - 2666-352X
TI - Revisiting the initial reaction rates for TMS combustion and a new evidence for metastable silica nanoparticles in the gas-phase synthesis
VL - 14
ER -
TY - CONF
AB - New technologies and materials carry significant potential for sustainable production and use of products. As an example, Additive Manufacturing technologies and materials promise lightweight design and energy efficient use of parts. Exhausting the full potential requires: a) consideration of uncertainties with respect to future capabilities, and b) upgradeable design guidelines to cover advancements consistently. The proposed approach merges concepts of Design-for-X with foresight algorithms of Scenario-Technique to derive actionable knowledge. It is validated by an application in the field of Additive Manufacturing, namely Metal Fused Deposition Modelling. Engineers benefit from the intuitive access to heterogeneous types of sustainability related information.
AU - Gräßler, Iris
AU - Mozgova, Iryna
AU - Pottebaum, Jens
AU - Ott, Manuel
AU - Jung, Philipp
AU - Hesse, Philipp
ED - Teti, Roberto
ID - 46451
KW - Design-for-X
KW - Scenario-Technique
KW - sustainability
KW - uncertainty
KW - Life-Cycle Engineering
KW - Additive Manufacturing
KW - Circular Economy
T2 - Procedia CIRP ICME
TI - Handling of uncertainties in the design of sustainable Additive Manufacturing products by merging Design-for-X and Scenario-Technique
ER -
TY - JOUR
AB - A reliable, but cost-effective generation of single-photon states is key for practical quantum communication systems. For real-world deployment, waveguide sources offer optimum compatibility with fiber networks and can be embedded in hybrid integrated modules. Here, we present what we believe to be the first chip-size fully integrated fiber-coupled heralded single photon source (HSPS) module based on a hybrid integration of a nonlinear lithium niobate waveguide into a polymer board. Photon pairs at 810 nm (signal) and 1550 nm (idler) are generated via parametric down-conversion pumped at 532 nm in the LiNbO3 waveguide. The pairs are split in the polymer board and routed to separate output ports. The module has a size of (2 × 1) cm^2 and is fully fiber-coupled with one pump input fiber and two output fibers. We measure a heralded second-order correlation function of g_h(2)=0.05 with a heralding efficiency of η_h=3.5% at low pump powers
AU - Kießler, Christian
AU - Conradi, Hauke
AU - Kleinert, Moritz
AU - Quiring, Viktor
AU - Herrmann, Harald
AU - Silberhorn, Christine
ID - 46644
IS - 14
JF - Optics Express
KW - Atomic and Molecular Physics
KW - and Optics
SN - 1094-4087
TI - Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology
VL - 31
ER -
TY - CHAP
AB - SoTL ist eine forschungsbasierte Haltung, die die Hochschullehre verbessern und innovieren will. Das deutschsprachige SoTL-Netzwerk hat fünf Thesen formuliert, die SoTL als Grundhaltung und Motor für Lehrentwicklung betonen. Der Beitrag diskutiert diese Thesen und stellt Aktivitäten des Netzwerks vor, die SoTL an Hochschulen und Universitäten fördern und vernetzen wollen. Dabei wird auch die Rolle der »Teacher-Researcher« hervorgehoben.
AU - Arnold, Maik
AU - Vöing, Nerea
AU - Reisas, Sabine
ID - 46647
SN - 2749-7623
T2 - Hochschulbildung: Lehre und Forschung
TI - Scholarship of Teaching and Learning (SoTL) als Motor für eine inter- und transdisziplinäre Hochschuldidaktik
ER -
TY - CONF
AU - Weller, Julian
AU - Roesmann, Daniel
AU - Eggert, Sönke
AU - von Enzberg, Sebastian
AU - Gräßler, Iris
AU - Dumitrescu, Roman
ID - 46493
SN - 2212-8271
T2 - Procedia CIRP
TI - Identification and prediction of standard times in machining for precision steel tubes through the usage of data analytics
VL - 119
ER -
TY - CONF
AU - Althaus, Maike
AU - Grieger, Nicole
AU - Vorbohle, Christian
AU - Müller, Michelle
AU - Kundisch, Dennis
ID - 46646
TI - Business Models for Cultural Event Platforms - A Taxonomy Approach
ER -
TY - GEN
AU - Mapura Ramirez, Luz Alejandra
AU - Kenig, Eugeny Y.
ID - 46591
TI - Zur Berechnug von flüssigkeitsseitigen Stoffübergagnskoeffizienten für Strukturpackungen
ER -
TY - JOUR
AB - The Koopman operator has become an essential tool for data-driven approximation of dynamical (control) systems in recent years, e.g., via extended dynamic mode decomposition. Despite its popularity, convergence results and, in particular, error bounds are still quite scarce. In this paper, we derive probabilistic bounds for the approximation error and the prediction error depending on the number of training data points; for both ordinary and stochastic differential equations. Moreover, we extend our analysis to nonlinear control-affine systems using either ergodic trajectories or i.i.d.
samples. Here, we exploit the linearity of the Koopman generator to obtain a bilinear system and, thus, circumvent the curse of dimensionality since we do not autonomize the system by augmenting the state by the control inputs. To the
best of our knowledge, this is the first finite-data error analysis in the stochastic and/or control setting. Finally, we demonstrate the effectiveness of the proposed approach by comparing it with state-of-the-art techniques showing its superiority whenever state and control are coupled.
AU - Nüske, Feliks
AU - Peitz, Sebastian
AU - Philipp, Friedrich
AU - Schaller, Manuel
AU - Worthmann, Karl
ID - 23428
JF - Journal of Nonlinear Science
TI - Finite-data error bounds for Koopman-based prediction and control
VL - 33
ER -
TY - GEN
AB - Different conflicting optimization criteria arise naturally in various Deep
Learning scenarios. These can address different main tasks (i.e., in the
setting of Multi-Task Learning), but also main and secondary tasks such as loss
minimization versus sparsity. The usual approach is a simple weighting of the
criteria, which formally only works in the convex setting. In this paper, we
present a Multi-Objective Optimization algorithm using a modified Weighted
Chebyshev scalarization for training Deep Neural Networks (DNNs) with respect
to several tasks. By employing this scalarization technique, the algorithm can
identify all optimal solutions of the original problem while reducing its
complexity to a sequence of single-objective problems. The simplified problems
are then solved using an Augmented Lagrangian method, enabling the use of
popular optimization techniques such as Adam and Stochastic Gradient Descent,
while efficaciously handling constraints. Our work aims to address the
(economical and also ecological) sustainability issue of DNN models, with a
particular focus on Deep Multi-Task models, which are typically designed with a
very large number of weights to perform equally well on multiple tasks. Through
experiments conducted on two Machine Learning datasets, we demonstrate the
possibility of adaptively sparsifying the model during training without
significantly impacting its performance, if we are willing to apply
task-specific adaptations to the network weights. Code is available at
https://github.com/salomonhotegni/MDMTN.
AU - Hotegni, Sedjro Salomon
AU - Peitz, Sebastian
AU - Berkemeier, Manuel Bastian
ID - 46649
T2 - arXiv:2308.12243
TI - Multi-Objective Optimization for Sparse Deep Neural Network Training
ER -
TY - JOUR
AU - Gonchikzhapov, Munko
AU - Kasper, Tina
ID - 46637
JF - Applications in Energy and Combustion Science
KW - Nanoparticle synthesis
KW - Flame spray pyrolysis
KW - SpraySyn burner
KW - Flame structure
KW - Species distribution
KW - Temperature distribution
SN - 2666-352X
TI - Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames
VL - 15
ER -
TY - JOUR
AB - Many problems in science and engineering require an efficient numerical approximation of integrals or solutions to differential equations. For systems with rapidly changing dynamics, an equidistant discretization is often inadvisable as it results in prohibitively large errors or computational effort. To this end, adaptive schemes, such as solvers based on Runge–Kutta pairs, have been developed which adapt the step size based on local error estimations at each step. While the classical schemes apply very generally and are highly efficient on regular systems, they can behave suboptimally when an inefficient step rejection mechanism is triggered by structurally complex systems such as chaotic systems. To overcome these issues, we propose a method to tailor numerical schemes to the problem class at hand. This is achieved by combining simple, classical quadrature rules or ODE solvers with data-driven time-stepping controllers. Compared with learning solution operators to ODEs directly, it generalizes better to unseen initial data as our approach employs classical numerical schemes as base methods. At the same time it can make use of identified structures of a problem class and, therefore, outperforms state-of-the-art adaptive schemes. Several examples demonstrate superior efficiency. Source code is available at https://github.com/lueckem/quadrature-ML.
AU - Dellnitz, Michael
AU - Hüllermeier, Eyke
AU - Lücke, Marvin
AU - Ober-Blöbaum, Sina
AU - Offen, Christian
AU - Peitz, Sebastian
AU - Pfannschmidt, Karlson
ID - 21600
IS - 2
JF - SIAM Journal on Scientific Computing
TI - Efficient time stepping for numerical integration using reinforcement learning
VL - 45
ER -
TY - CHAP
AU - Dahms, Frederik
AU - Homberg, Werner
ID - 46691
SN - 2195-4356
T2 - Lecture Notes in Mechanical Engineering
TI - Analysis and Modelling of the Deformation in the Manufacture of Flange-Contours by the Combined Friction-Spinning and Flow-Forming Process
ER -
TY - CONF
AU - Garnefeld, I.
AU - Böhm, Eva
AU - Hanf, L.
AU - Helm, S.
ID - 46665
T2 - 2023 AMA Summer Academic Conference, San Francisco, CA
TI - Unboxing video effectiveness – Does speech matter?
ER -
TY - CONF
AU - Kessing, K.
AU - Garnefeld, I.
AU - Böhm, Eva
ID - 46666
T2 - EMAC Annual Conference, Odense, Denmark
TI - The dark and bright side of online reviews in manufacturer online shops
ER -
TY - CONF
AU - Hanf, L.
AU - Garnefeld, I.
AU - Böhm, Eva
AU - Helm, S.
ID - 46667
T2 - EMAC Annual Conference, Odense, Denmark
TI - Stimulating engagement with unboxing videos – Does speech matter?
ER -
TY - CONF
AU - Sadeghi-Kohan, Somayeh
AU - Hellebrand, Sybille
AU - Wunderlich, Hans-Joachim
ID - 46739
T2 - 2023 53rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W)
TI - Low Power Streaming of Sensor Data Using Gray Code-Based Approximate Communication
ER -
TY - CONF
AU - Janzen, Thomas
AU - Wotschel, Philipp
AU - Meier, Jana
AU - Vogelsang, Christoph
ID - 46740
T2 - EARLI 2023
TI - Assessing pre-service EFL teachers’ feedback performance in role-play-based simulations
ER -
TY - JOUR
AU - Zscherp, Mario Fabian
AU - Jentsch, Silas Aurel
AU - Müller, Marius Johannes
AU - Lider, Vitalii
AU - Becker, Celina
AU - Chen, Limei
AU - Littmann, Mario
AU - Meier, Falco
AU - Beyer, Andreas
AU - Hofmann, Detlev Michael
AU - As, Donat Josef
AU - Klar, Peter Jens
AU - Volz, Kerstin
AU - Chatterjee, Sangam
AU - Schörmann, Jörg
ID - 46741
IS - 33
JF - ACS Applied Materials & Interfaces
KW - General Materials Science
SN - 1944-8244
TI - Overcoming the Miscibility Gap of GaN/InN in MBE Growth of Cubic InxGa1–xN
VL - 15
ER -
TY - CONF
AU - Müller, Michelle
AU - Neumann, Jürgen
ID - 33722
T2 - Proceedings of the 55th Hawaii International Conference on System Sciences (HICSS)
TI - Bring me my Meal on your Wheel - An Empirical Analysis of the Impact of Food Delivery Platforms on Local Restaurant Employment
ER -
TY - JOUR
AB - AbstractWorking conditions of knowledge workers have been subject to rapid change recently. Digital nomadism is no longer a phenomenon that relates only to entrepreneurs, freelancers, and gig workers. Corporate employees, too, have begun to uncouple their work from stationary (home) offices and 9-to-5 schedules. However, pursuing a permanent job in a corporate environment is still subject to fundamentally different values than postulated by the original notion of digital nomadism. Therefore, this paper explores the work identity of what is referred to as ‘corporate nomads’. By drawing on identity theory and the results of semi-structured interviews, the paper proposes a conceptualization of the corporate nomad archetype and presents nine salient identity issues of corporate nomads (e.g., holding multiple contradictory identities, the flexibility paradox, or collaboration constraints). By introducing the ‘corporate nomad’ archetype to the Information Systems literature, this article helps to rethink established conceptions of “home office” and socio-spatial configurations of knowledge work.
AU - Marx, Julian
AU - Stieglitz, Stefan
AU - Brünker, Felix
AU - Mirbabaie, Milad
ID - 44143
JF - Business & Information Systems Engineering
KW - Information Systems
SN - 2363-7005
TI - Home (Office) is where your Heart is
ER -
TY - JOUR
AU - Zander, K.K.
AU - Nguyen, D.
AU - Mirbabaie, Milad
AU - Garnett, S.T.
ID - 46487
JF - International Journal of Disaster Risk Reduction
KW - Geology
KW - Safety Research
KW - Geotechnical Engineering and Engineering Geology
KW - Building and Construction
SN - 2212-4209
TI - Aware but not prepared: understanding situational awareness during the century flood in Germany in 2021
VL - 96
ER -
TY - BOOK
AB - In the proposal for our CRC in 2011, we formulated a vision of markets for
IT services that describes an approach to the provision of such services
that was novel at that time and, to a large extent, remains so today:
„Our vision of on-the-fly computing is that of IT services individually and
automatically configured and brought to execution from flexibly combinable
services traded on markets. At the same time, we aim at organizing
markets whose participants maintain a lively market of services through
appropriate entrepreneurial actions.“
Over the last 12 years, we have developed methods and techniques to
address problems critical to the convenient, efficient, and secure use of
on-the-fly computing. Among other things, we have made the description
of services more convenient by allowing natural language input,
increased the quality of configured services through (natural language)
interaction and more efficient configuration processes and analysis
procedures, made the quality of (the products of) providers in the
marketplace transparent through reputation systems, and increased the
resource efficiency of execution through reconfigurable heterogeneous
computing nodes and an integrated treatment of service description and
configuration. We have also developed network infrastructures that have
a high degree of adaptivity, scalability, efficiency, and reliability, and
provide cryptographic guarantees of anonymity and security for market
participants and their products and services.
To demonstrate the pervasiveness of the OTF computing approach, we
have implemented a proof-of-concept for OTF computing that can run
typical scenarios of an OTF market. We illustrated the approach using
a cutting-edge application scenario – automated machine learning (AutoML).
Finally, we have been pushing our work for the perpetuation of
On-The-Fly Computing beyond the SFB and sharing the expertise gained
in the SFB in events with industry partners as well as transfer projects.
This work required a broad spectrum of expertise. Computer scientists
and economists with research interests such as computer networks and
distributed algorithms, security and cryptography, software engineering
and verification, configuration and machine learning, computer engineering
and HPC, microeconomics and game theory, business informatics
and management have successfully collaborated here.
AU - Haake, Claus-Jochen
AU - Meyer auf der Heide, Friedhelm
AU - Platzner, Marco
AU - Wachsmuth, Henning
AU - Wehrheim, Heike
ID - 45863
TI - On-The-Fly Computing -- Individualized IT-services in dynamic markets
VL - 412
ER -
TY - JOUR
AU - Stieglitz, Stefan
AU - Mirbabaie, Milad
AU - Deubel, Annika
AU - Braun, Lea-Marie
AU - Kissmer, Tobias
ID - 45458
JF - International Journal of Information Management
KW - Library and Information Sciences
KW - Computer Networks and Communications
KW - Information Systems
SN - 0268-4012
TI - The potential of digital nudging to bridge the gap between environmental attitude and behavior in the usage of smart home applications
VL - 72
ER -
TY - JOUR
AU - Mirbabaie, Milad
AU - Marx, Julian
AU - Erle, Lukas
ID - 46746
JF - Pacific Asia Journal of the Association for Information Systems
SN - 1943-7544
TI - Digital Nudge Stacking and Backfiring: Understanding Sustainable E-Commerce Purchase Decisions
ER -
TY - DATA
AB - Die Energieaufnahme von Haushaltskältegeräten ist seit den 1990er Jahren erheblich gesunken. Dieser Wert wird von den Herstellern im Neuzustand der Geräte unter Normbedingungen bestimmt. Wie jedes technische System unterliegen jedoch auch Haushaltskältegeräte einem Alterungsprozess, der zu einem Anstieg der Energieaufnahme über die Zeit führt. Im Rahmen dieser Dissertation wurde auf der Grundlage von 100 Messungen der Energieaufnahme, die an 32 Geräten über einen Zeitraum von 21 Jahren durchgeführt wurden, ein Alterungsmodell entwickelt. Dieses Modell ist das erste, das mit Hilfe von Daten der Energieaufnahme real gealterter Geräte entwickelt wurde. Es beschreibt einen Anstieg der Energieaufnahme von 27 % über die durchschnittliche Einsatzzeit eines Haushaltskältegeräts von 16 Jahren. Der stärkste Anstieg erfolgt in den ersten fünf Betriebsjahren. Durch Diffusionsvorgänge in dem im Gehäuse verbauten Polyurethan-Schaum wird das im Zellgas vorhandene Kohlenstoffdioxid durch Luft ersetzt. Hierdurch steigt die Wärmeleitfähigkeit des Schaums um ca. 33 % an, wodurch sich die Energieaufnahme der Geräte erhöht. Des Weiteren wurde der Einsatz von Paraffinen als Phasenwechselmaterial in Haushaltskältegeräten untersucht. Durch deren Einsatz konnte die Energieaufnahme gesenkt und die Funktionalität der Geräte gesteigert werden. Hierfür sind detaillierte Kenntnisse der Materialkenndaten der Paraffine notwendig. Die Wärmeleitfähigkeit der verschiedenen Paraffin-Stoffgruppen in der festen Phase ist jedoch bisher nur unzureichend untersucht worden. Daher wurde ein Messaufbau entwickelt, mit dem die Wärmeleitfähigkeit von festem Paraffin bestimmt werden kann, und es wurden entsprechende Messungen durchgeführt.
AU - Paul, Andreas
ID - 46753
TI - Analyse von Alterungsmechanismen im Hinblick auf die Effizienz von Haushaltskältegeräten
ER -
TY - JOUR
AB - Qualitative comparative analysis (QCA) enables researchers in international management to better understand how the impact of a single explanatory factor depends on the context of other factors. But the analytical toolbox of QCA does not include a parameter for the explanatory power of a single explanatory factor or “condition”. In this paper, we therefore reinterpret the Banzhaf power index, originally developed in cooperative game theory, to establish a goodness-of-fit parameter in QCA. The relative Banzhaf index we suggest measures the explanatory power of one condition averaged across all sufficient combinations of conditions. The paper argues that the index is especially informative in three situations that are all salient in international management and call for a context-sensitive analysis of single conditions, namely substantial limited diversity in the data, the emergence of strong INUS conditions in the analysis, and theorizing with contingency factors. The paper derives the properties of the relative Banzhaf index in QCA, demonstrates how the index can be computed easily from a rudimentary truth table, and explores its insights by revisiting selected papers in international management that apply fuzzy-set QCA. It finally suggests a three-step procedure for utilizing the relative Banzhaf index when the causal structure involves both contingency effects and configurational causation.
AU - Haake, Claus-Jochen
AU - Schneider, Martin
ID - 34114
JF - Journal of International Management
KW - Qualitative comparative analysis
KW - Banzhaf power index
KW - causality
KW - explanatory power
TI - Playing games with QCA: Measuring the explanatory power of single conditions with the Banzhaf index
ER -
TY - CONF
AU - Schwerin, Imke
AU - Häsel-Weide, Uta
ED - Novotna, J.
ED - Moraova, H.
ID - 46757
T2 - International Symposium in Elementary Mathematics Teaching. Proceedings: New Directions in Elementary Mathematics Education
TI - Second grader´s understanding of doubling and halfing in various representations
ER -
TY - CHAP
AU - Schmidt, Rebekka
AU - Tenberge, Claudia
AU - Häsel-Weide, Uta
ED - Vöing, N.
ED - Schmidt, R.
ED - Neiske, I.
ID - 46758
T2 - Aktive Teilhabe fördern – ICM und Student Engagement in der Hochschullehre
TI - Lehre in Zeiten von Digitalisierung und Inklusion - Beispiele aus drei Fächern
ER -
TY - JOUR
AU - A. Erofeeva, Maria
AU - Klowait, Nils
AU - Zababurin, Denis
ID - 46103
IS - 3
JF - Sociology of Power
KW - General Medicine
SN - 2413-144X
TI - How to Speak Silently — Rethinking Materiality, Agency, and Communicative Competence in Virtual Reality
VL - 34
ER -
TY - JOUR
AB - The demands on joining technology are constantly increasing due to the consistent lightweight construction and the associated increasing material mix. To meet these requirements, the adaptability of the joining processes must be improved to be able to process different material combinations and to react to challenges caused by deviations in the process chain. One example of a highly adaptable process due to the two-step process sequence is thermomechanical joining with Friction Spun Joint Connectors (FSJCs) that can be individually adapted to the joint. In this paper, the potentials of the adaption in the two-stage joining process with aluminium auxiliary joining elements are investigated. To this end, it is first investigated whether a thermomechanical forming process can be used to achieve a uniform and controlled manufacturing regarding the process variable of the temperature as well as the geometry of the FSJC. Based on the successful proof of the high and good repeatability in the FSJC manufacturing, possibilities, and potentials for the targeted influencing of the process and FSJC geometry are shown, based on an extensive variation of the process input variables (delivery condition and thus mechanical properties of the raw parts as well as the process parameters of rotational speed and feed rate). Here it can be shown that above all, the feed rate of the final forming process has the strongest influence on the process and thus also offers the strongest possibilities for influencing it.
AU - Borgert, Thomas
AU - Henke, Maximilian
AU - Homberg, Werner
ID - 46483
IS - 4
JF - Journal of Manufacturing and Materials Processing
KW - Industrial and Manufacturing Engineering
KW - Mechanical Engineering
KW - Mechanics of Materials
SN - 2504-4494
TI - Investigations on the Influences of the Thermomechanical Manufacturing of Aluminium Auxiliary Joining Elements
VL - 7
ER -
TY - CHAP
AB - Due to current global challenges regarding energy security as well as climate change the importance of preserving the nature and all available resources is steadily increasing. In order to achieve the energy-saving and climate targets, it is not only necessary to develop new processes and processing possibilities, but also to optimise known process chains with regard to energy and resource efficiency in the area of production technology. Here, the recycling of supposed production waste represents an opportunity to save energy. In addition to the conventional and smelting metallurgical recycling process, extensive research activities have therefore been carried out for alternative solid-state recycling processes. One example is the friction-induced recycling process, which has been used in past studies to demonstrate the energy- and resource-efficient production of semi-finished products from aluminium scrap such as chips. In addition, properties like chemical composition and strength can be adjusted locally and in terms of processing time. This can be used to improve the versatility of further processing steps.
AU - Borgert, Thomas
AU - Homberg, Werner
ID - 46752
SN - 2195-4356
T2 - Lecture Notes in Mechanical Engineering
TI - Friction-Induced Recycled Aluminium Semi-finished Products in Thermo-mechanical Joining Technology
ER -
TY - BOOK
AB - „Lerne deinen Körper besser kennen“, „Das Beste für deine Gesundheit“ und „Ihre Transformation beginnt jetzt“ - mit Versprechen wie diesen vermitteln die Produkttexte von Wearables wie Fitnesstracker und Smartwatches ein ganz bestimmtes Bild ihrer vorgesehenen Nutzer*innen und deren Nutzung. Verbunden mit den kleinen, am Handgelenk getragenen Geräten sind Fragen nach Erkenntnisgewinn und Kontrollverlust, Selbstoptimierung und Quantifizierungslogiken, Eigenverantwortung und Fremdsteuerung. Die vorliegende Arbeit widmet sich diesem komplexen Spannungsfeld und verfolgt dabei einen multiperspektivischen Ansatz: im Rahmen einer Dispositivanalyse werden die einzelnen Elemente des Wearable-Dispositivs als eigenständige, empirisch zu untersuchende Analysegegenstände betrachtet, um so das Zusammenwirken und die komplexe Beziehung von Diskursen, Gegenständen, Nutzung, Subjekten und Gesellschaft zu erforschen. Ein besonderes Erkenntnisinteresse liegt dabei auf dem Wissen, was sich über Wearables etabliert hat und sich in den Alltagspraktiken der Nutzer*innen widerspiegelt sowie bei der Frage nach den möglichen Funktionen und Auswirkungen des Wearable-Dispositivs.
AU - Schloots, Franziska Margarete
ID - 44719
KW - Selbstvermessung
KW - Dispositivanalyse
KW - Gesundheitsdiskurs
KW - Quantifizierungsgesellschaft
KW - Wearables
KW - Selbstoptimierung
SN - 2512-112X
TI - Mit dem Leben Schritt halten - Eine Analyse des Wearable-Dispositivs
ER -
TY - CONF
AU - Tchomgue Simeu, Arnold
AU - Mahnken, Rolf
ID - 46762
T2 - XI International Conference on Adaptive Modeling and Simulation
TI - Mesh- and model adaptivity for elasto-plastic mean-field and full-field homogenization based on downwind and upwind approximations
ER -
TY - JOUR
AB -
Purpose
This study aims to conceptually propose and empirically validate a path perspective on the servitization process of manufacturing firms. It identifies a customer and an outcome path to servitization, sheds light on the pivotal role of digital technology usage for both value-creating paths and explores their financial and relational performance outcomes.
Design/methodology/approach
The authors use a mixed-method approach, combining a qualitative study with a cross-sectional survey in the USA, the UK and Germany.
Findings
Manufacturing firms choose between two generic paths to servitization, a customer and an outcome path. Digital technology usage is equally important for both value-creating paths. Progress on the outcome path has a positive effect on firms’ financial performance, whereas the customer path has an indirect effect only, fully mediated by firms’ relational performance. Customer tenure and customer’s open-mindedness are contingency variables in the digital technology usage – servitization path – firm performance framework.
Research limitations/implications
A path perspective is useful to conceptualize the servitization processes in manufacturing industries. Future research should investigate the sequential choice of servitization paths and explore its drivers and performance outcomes.
Practical implications
To create and claim superior value for their customers, managers can choose between two servitization paths, leading to differential performance outcomes. While digital technology usage is key to progress on both paths, it is particularly effective for newly acquired customers on the customer path. Suppliers should target their value-creating service offerings at open-minded customer firms to reap their full performance potential.
Originality/value
Propose and empirically validate a path-perspective on servitization. Understand the pivotal importance of digital technology usage for both servitization paths.
AU - Harrmann, Lisa Katharina
AU - Eggert, Andreas
AU - Böhm, Eva
ID - 46642
IS - 3
JF - European Journal of Marketing
KW - Marketing
SN - 0309-0566
TI - Digital technology usage as a driver of servitization paths in manufacturing industries
VL - 57
ER -
TY - JOUR
AB - Über zwei Drittel der Anfänger*innen im Übergangssystem verfügen maximal über einen Hauptschul-/Mittelschulabschluss. Sie sind damit überrepräsentiert, was sich weniger durch ihre Kompetenzen als mit ihrem sozioökonomischen Status und klassenspezifischen Nachqualifizierungsverhalten erklären lässt.
AU - Sommer, Christian
ID - 46765
JF - Berufsbildung. Zeitschrift für Theorie-Praxis-Dialog
KW - Social inequality
KW - Transition system
SN - 00059536
TI - Der Hauptschulabschluss als sozial selektiver Hauptzulieferer des Übergangssystems
VL - 199
ER -
TY - CHAP
AU - Süßmann, Johannes
ED - Diekmann, Julia
ED - Moors, Markus
ED - Neuwöhner, Andreas
ID - 46234
SN - 978-3-506-79364-5
T2 - Monumenta. Erinnerungsorte zwischen Weser und Lippe. Die Monumenta Paderbornensia des Ferdinand von Fürstenberg
TI - »In der Art von Inschriften«. Emblematische Inschriftendichtung als Darstellungsprinzip von Ferdinand von Fürstenbergs Monumenta Paderbornensia (1669 und 1672)
VL - 92
ER -
TY - JOUR
AU - Zdoupas, Philippos
AU - Laubenstein, Désirée
ID - 45323
IS - 5
JF - European Journal of Special Needs Education (Latest Articles)
TI - Perceptions of inclusion in students with diagnosed behavioural, emotional and social difficulties (BESD) displaying internalising and externalising behaviour in inclusive and special education
VL - 38
ER -
TY - BOOK
AU - Zdoupas, Philippos
AU - Lara, Kuhlhoff
AU - Martin, Grust
AU - Jaekel, Anne-Marie
AU - Jan, Ehlert
ID - 46276
TI - Entwicklungszielgespräche in der Sekundarstufe I - Systemisches Coaching mit Schüler:innen nach dem GROW-Modell
ER -
TY - JOUR
AU - Schubatzky, Thomas
AU - Burde, Jan-Philipp
AU - Große-Heilmann, Rike
AU - Haagen-Schützenhöfer, Claudia
AU - Riese, Josef
AU - Weiler, David
ID - 46760
JF - Computers & Education
KW - Education
KW - General Computer Science
SN - 0360-1315
TI - Predicting the development of digital media PCK/TPACK: The role of PCK, motivation to use digital media, interest in and previous experience with digital media
ER -
TY - JOUR
AU - Wallscheid, Oliver
AU - Peitz, Sebastian
AU - Stenner, Jan
AU - Weber, Daniel
AU - Boshoff, Septimus
AU - Meyer, Marvin
AU - Chidananda, Vikas
AU - Schweins, Oliver
ID - 46784
IS - 89
JF - Journal of Open Source Software
KW - General Earth and Planetary Sciences
KW - General Environmental Science
SN - 2475-9066
TI - ElectricGrid.jl - A Julia-based modeling and simulationtool for power electronics-driven electric energy grids
VL - 8
ER -
TY - CHAP
AB - SoTL ist eine forschungsbasierte Haltung, die die Hochschullehre verbessern und innovieren will. Das deutschsprachige SoTL-Netzwerk hat fünf Thesen formuliert, die SoTL als Grundhaltung und Motor für Lehrentwicklung betonen. Der Beitrag diskutiert diese Thesen und stellt Aktivitäten des Netzwerks vor, die SoTL an Hochschulen und Universitäten fördern und vernetzen wollen. Dabei wird auch die Rolle der »Teacher-Researcher« hervorgehoben.
AU - Arnold, Maik
AU - Vöing, Nerea
AU - Reisas, Sabine
ID - 46787
SN - 2749-7623
T2 - Hochschulbildung: Lehre und Forschung
TI - Scholarship of Teaching and Learning (SoTL) als Motor für eine inter- und transdisziplinäre Hochschuldidaktik
ER -
TY - JOUR
AB - For improved and rational design of catalysts, in-depth knowledge of their formation and structural evolution during synthesis is a key parameter. Thus, preparation of a Ni methanation catalyst derived from...
AU - Prinz, Nils
AU - Strübbe, Sven
AU - Bauer, Matthias
AU - Zobel, Mirijam
ID - 45480
JF - New Journal of Chemistry
KW - Materials Chemistry
KW - General Chemistry
KW - Catalysis
SN - 1144-0546
TI - Structural transitions during Ni nanoparticle formation by decomposition of a Ni-containing metal-organic framework using in-situ total scattering
ER -
TY - CHAP
AU - Böker, Ines
AU - Willeke, Stephanie
ED - Hofmann, Michael
ED - Thielking, Sigrid
ID - 46795
T2 - Neue Perspektiven einer kulturwissenschaftlich orientierten Literaturdidaktik
TI - "Nicht das erste Mal, dass ich die Orientierung verloren habe" – Transkulturalität und Deutschdidaktik im Dialog
ER -
TY - CHAP
AU - Böker, Ines
ED - Böker, Ines
ED - Schulte Eickholt, Swen
ID - 46797
T2 - Interkulturelle Konstellationen in Literaturwissenschaft und Literaturdidaktik
TI - Kurze Bestandsaufnahme zum postmigrantischen Theater und postmigrantischer Theaterwissenschaft
ER -
TY - BOOK
ED - Böker, Ines
ED - Schulte Eickholt, Swen
ID - 46798
TI - Interkulturelle Konstellationen in Literaturwissenschaft und Literaturdidaktik
ER -
TY - GEN
AB - In common law systems, firms’ litigation risk depends both on written laws and how courts interpret these laws. Using 321 U.S. circuit court rulings, we introduce a novel measure capturing courts’ attitudes towards defendants in securities lawsuits. Our results confirm that financial misreporting firms in more defendant-friendly circuits face fewer lawsuits. Consistent with lower expected litigation costs, firms in these circuits face less negative market reactions when misreporting is revealed, invest less in preventing misreporting, and are more likely to engage in aggressive misreporting. We conclude that defendant-friendly precedents reduce firms’ legal liability and worsen their financial reporting quality.
AU - Franke, Benedikt
AU - Huang, Allen
AU - Li, Reeyarn
AU - Wang, Hui
ID - 46804
TI - Securities Law Precedents, Legal Liability, and Financial Reporting Quality
ER -
TY - CHAP
AU - Rossel, M.
AU - Meschut, G.
ID - 46809
SN - 2195-4356
T2 - Lecture Notes in Mechanical Engineering
TI - Modeling and Parameterization for a 3D Simulation of Clinching with an Extensible Die
ER -
TY - JOUR
AB - AbstractObjectiveConcerns about short‐ and long‐term consequences of repetitive heading contributed to heading restrictions in youth football in some countries. This prospective longitudinal cohort study aims to describe heading exposure in children's and youth football over two seasons using standardized video analysis.MethodsAll matches and training sessions of a male Under‐11 (n = 29), Under‐15 (n = 28), Under‐19 (n = 38), and female Under‐17 (n = 39) team were videotaped during the seasons 2019–2020 and 2020–2021. Heading frequencies and characteristics were analyzed. Individual heading exposure is presented as average incidence rates (IR) per 1000 match/training hours.ResultsIn 275 matches and 673 training sessions, 22 921 headers were observed. Heading IR per player in matches was 1256 (Under‐11 m), 1608 (Under‐15 m), 1050 (Under‐17 f), and 1966 (Under‐19 m). In training sessions, IR per player was 739 (Under‐11 m), 2206 (Under‐15 m), 1661 (Under‐17 f), and 1419 (Under‐19 m). Five Under‐15 males headed the ball five to eight times per training on average. Most headers were performed without heading duels. Flight distance was predominantly 5–20 m (54%) in matches and <5 m (65%) in training. While head impact location most frequently was at frontal areas, one‐third of all headers in Under‐11 in matches hit temporal, parietal, and occipital parts of the head.ConclusionHeading incidence was low in the youngest age group, whereas (predominantly five) Under‐15 males showed very high heading exposures in training. In assessment and regulation of heading burden, training sessions and individual heading behavior should specifically be addressed. Recommendations for heading the ball in practice should account for individual and age‐related differences.
AU - Reeschke, Rebecca
AU - Haase, Franziska Katharina
AU - Dautzenberg, Lena
AU - Krutsch, Werner
AU - Reinsberger, Claus
ID - 46818
IS - 9
JF - Scandinavian Journal of Medicine & Science in Sports
KW - Physical Therapy
KW - Sports Therapy and Rehabilitation
KW - Orthopedics and Sports Medicine
SN - 0905-7188
TI - Training matters: Heading incidence and characteristics in children's and youth football (soccer) players
VL - 33
ER -
TY - BOOK
AU - Rossel, Moritz Sebastian
AU - Meschut, Gerson
ID - 46812
TI - Methodenentwicklung zur verbesserten Prognosegüte beim Clinchen mit beweglicher Matrize in der numerischen Fügeprozesssimulation
VL - 598
ER -
TY - JOUR
AU - Höper, Lukas
AU - Schulte, Carsten
ID - 46186
IS - 4
JF - MNU journal
SN - 0025-5866
TI - Paradigmenwechsel vom klassischen zum datengetriebenen Problemlösen im Informatikunterricht
VL - 76
ER -
TY - JOUR
AU - Pfister, Daniel
AU - Jackson, Robin C
AU - Güldenpenning, Iris
AU - Williams, A Mark
ID - 46736
JF - Human Movement Science
TI - Timing a fake punch: Inhibitory effects in a boxing-specific spatial attention task
VL - 89
ER -
TY - CONF
AU - Blömer, Johannes
AU - Bobolz, Jan
AU - Bröcher, Henrik
ID - 35014
TI - On the impossibility of surviving (iterated) deletion of weakly dominated strategies in rational MPC
ER -
TY - CONF
AU - Blömer, Johannes
AU - Bobolz, Jan
AU - Porzenheim, Laurens Alexander
ID - 43458
TI - A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices
ER -
TY - CHAP
AU - Schroeter-Wittke, Harald
AU - Junkermann, Ilse
ID - 46856
T2 - Ich lobe meinen Gott, der aus der Tiefe mich holt. Hymnologische Kommentare zu den Liedern im Ergänzungsheft zum Evangelischen Gesangbuch. Jan Janssen zum 60. Geburtstag. HEG 3/Ergänzungsheft, Göttingen 2023
TI - Stern über Bethlehem (EG.E 1)
ER -
TY - CHAP
AU - Schroeter-Wittke, Harald
ID - 46857
T2 - Ich lobe meinen Gott, der aus der Tiefe mich holt. Hymnologische Kommentare zu den Liedern im Ergänzungsheft zum Evangelischen Gesangbuch. Jan Janssen zum 60. Geburtstag. HEG 3/Ergänzungsheft, Göttingen 2023
TI - Wir haben Gottes Spuren festgestellt (EG.E 20)
ER -
TY - JOUR
AB - In this work, the influence of the filler–matrix adhesion on the tensile properties of laser-sintered parts built with Polyamide 613 filled with glass beads was investigated. For this purpose, dry blends of glass beads with and without organosilane coupling agents and polyamide powder were prepared and processed into tensile specimens on an EOS P396 laser sintering system. The samples were tested both in the dry state and after an accelerated conditioning in a climate chamber. Furthermore, finite element method (FEM) simulations were performed to model the extreme cases of optimum adhesion and no adhesion. By correlating the tensile tests with the simulation results and by analyzing the fracture surfaces, it was shown that the filler–matrix adhesion is sufficient in the dry state but is strongly degraded by conditioning. Even the presence of various organosilane thin films could not prevent a strong deterioration of the filler–matrix adhesion and the associated deterioration of the mechanical properties. Since a comparison with an injection-molded sample of the same polymer filler combination shows identical behavior after conditioning, it is assumed that this problem is not limited to additively manufactured parts.
AU - Kletetzka, Ivo
AU - Kosanke, Maren
AU - Meinderink, Dennis
AU - Neßlinger, Vanessa
AU - Grundmeier, Guido
AU - Schmid, Hans-Joachim
ID - 46815
JF - Progress in Additive Manufacturing
KW - Industrial and Manufacturing Engineering
SN - 2363-9512
TI - Influence of the filler–matrix adhesion and the effects of conditioning on tensile properties of laser-sintered parts built with polyamide–glass bead dry blends
ER -
TY - GEN
AB - Abstract
In this work, the influence of the filler matrix adhesion on the tensile properties of laser-sintered parts built with Polyamide 613 filled with glass beads was investigated. For this purpose, dry blends of glass beads with and without organosilane coupling agents and polyamide powder were prepared and processed into tensile specimens on an EOS P396. The samples were tested both in the dry state and after an accelerated conditioning in a climate chamber. Furthermore, FEM simulations were performed to model the limiting cases of optimum adhesion and no adhesion. By correlating the tensile tests with the simulation results and by analyzing the fracture surfaces, it was shown that the filler matrix adhesion is sufficient in the dry state but is strongly degraded by conditioning. Even the presence of various organosilane thin films could not prevent a strong deterioration of the filler-matrix adhesion and the associated deterioration of the mechanical properties. Since a comparison with an injection molded sample of the same polymer filler combination shows identical behavior after conditioning, it is assumed that this problem is not limited to additively manufactured parts.
AU - Kletetzka, Ivo
AU - Kosanke, Maren
AU - Meinderink, Dennis
AU - Neßlinger, Vanessa
AU - Grundmeier, Guido
AU - Schmid, Hans-Joachim
ID - 43049
TI - Influence of the filler matrix adhesion and the effects of conditioning on tensile properties of laser sintered parts built with polyamide glass bead dry blends
ER -
TY - GEN
AU - Kletetzka, Ivo
ID - 45783
TI - Tensile Testing for Polymer AM - Best Pratice at the DMRC
ER -
TY - JOUR
AB - In the laser sintering technology, the semi-crystalline polymer material is exposed to elevated temperatures during processing, which leads to serious material ageing for most materials. This has already been investigated intensively by various authors. However, the ageing of the material at ambient temperatures during shelf life has not been the focus so far. The need to analyse the shelf life can be derived from an ecological and economic point of view. This work is focusing on the shelf life of PA2200 (PA12). To reduce the potential influences of powder production fluctuations, two different powder batches stored for 5.5 years and 6.5 years are investigated and compared to a reference powder produced 0.5 years before these investigations. Multiple powder analyses and part characterisations have been performed. A significant yellowing and molecular chain length reduction can be derived from the measurement results. Whereas the influence on mechanical part performance was minor, the parts built with the stored powders are more yellowish. As it is most likely that this is due to the consumption of polyamide stabilisers, it can be assumed that these parts will be subject to significantly faster ageing. Therefore, it is still not recommended to use the stored powders for critical parts or light intense and humid environments.
AU - Klippstein, Sven Helge
AU - Kletetzka, Ivo
AU - Sural, Ilknur
AU - Schmid, Hans-Joachim
ID - 43046
JF - The International Journal of Advanced Manufacturing Technology
KW - Selective laser sintering
KW - Shelf life
KW - Polyamide 12
KW - powder
KW - PA2200
KW - material ageing
TI - Influence of a prolonged shelf time on PA12 laser sintering powder and resulting part properties
ER -
TY - GEN
AU - Sajadi, Said
ID - 46861
TI - Charakterisierung und Bewertung von flammgeschützten PA12 Pulvermischungen hinsichtlich der Verarbeitbarkeit im Lasersinter-Prozess
ER -
TY - CONF
AU - Troschitz, Juliane
AU - Vorderbrüggen, Julian Heinrich Josef
AU - Gude, Maik
AU - Meschut, Gerson
ID - 46866
T2 - Proceedings of the 23rd International Conference on Composite Materials (ICCM23)
TI - Clinching and resistance spot welding of thermoplastic composites with metals using inserts as joining interfaces
ER -
TY - CHAP
AU - Dieter, Peter
ID - 46867
SN - 0302-9743
T2 - Lecture Notes in Computer Science
TI - A Regret Policy for the Dynamic Vehicle Routing Problem with Time Windows
ER -
TY - CHAP
AU - Menge, Dennis
AU - Milaege, Dennis
AU - Hoyer, Kay-Peter
AU - Schmid, Hans-Joachim
AU - Schaper, Mirko
ED - Horwath, Illona
ED - Schweizer, Swetlana
ID - 46870
SN - 2703-1543
T2 - Climate Protection, Resource Efficiency, and Sustainable Engineering
TI - Case Study IV: Individualized Medical Technology using Additive Manufacturing
ER -
TY - CONF
AU - Hansmeier, Philipp
ID - 46892
T2 - Proceedings of the 18th International Conference on Wirtschaftsinformatik
TI - Exploring Platform Types and Related Concepts in Service Research – A Systematic Scoping Literature Review
ER -
TY - BOOK
ED - Alpermann, Ilsabe
ED - Besser, Beate
ED - Evang, Martin
ED - Schroeter-Wittke, Harald
ID - 46854
TI - Ich lobe meinen Gott, der aus der Tiefe mich holt. Hymnologische Kommentare zu den Liedern im Ergänzungsheft zum Evangelischen Gesangbuch. Jan Janssen zum 60. Geburtstag. HEG 3/Ergänzungsheft, Göttingen 2023
ER -
TY - CHAP
AU - Schroeter-Wittke, Harald
AU - Kirsner, Inge
ID - 46896
T2 - Predigtstudien VI/1
TI - XXmas: Macht gebären statt Macht gebaren. 1. Weihnachtstag (Christfest I) 2Mose 2,1-10
ER -
TY - GEN
AU - Vernholz, Mats
AU - Temmen, Katrin
ID - 46959
TI - Gewerblich-technische Lehrkräftebildung in Deutschland – Analyse der Einflüsse auf das akademische Selbstkonzept von Lehramtsstudierenden technischer (beruflicher) Fachrichtungen
ER -
TY - BOOK
AU - Mildorf, Jarmila
ID - 37521
SN - 9783111072265
TI - Life Storying in Oral History: Fictional Contamination and Literary Complexity
VL - 85
ER -
TY - CHAP
AU - Hattermann, Mathias
AU - Rezat, Sebastian
AU - Sträßer, Rudolf
ID - 46956
SN - 9783662666036
T2 - Handbuch der Mathematikdidaktik
TI - Geometrie: Leitidee Raum und Form
ER -
TY - CHAP
AU - Hefendehl-Hebeker, Lisa
AU - Rezat, Sebastian
ID - 46955
SN - 9783662666036
T2 - Handbuch der Mathematikdidaktik
TI - Algebra: Leitidee Symbol und Formalisierung
ER -
TY - GEN
AU - Afsahnoudeh, Reza
AU - Holzmüller, Maik
AU - Bader, Fabian
AU - Homberg, Werner
AU - Kenig, Eugeny Y.
ID - 28941
TI - Numerische Untersuchung von Oberflächenstrukturierung zur Erhöhung der Effizienz von Kissenplatten-Wärmeübertragern
ER -
TY - JOUR
AB - AbstractLow socio-economic status is associated with higher SARS-CoV-2 incidences. In this paper we study whether this is a result of differences in (1) the frequency, (2) intensity, and/or (3) duration of local SARS-CoV-2 outbreaks depending on the local housing situations. So far, there is not clear evidence which of the three factors dominates. Using small-scale data from neighborhoods in the German city Essen and a flexible estimation approach which does not require prior knowledge about specific transmission characteristics of SARS-CoV-2, behavioral responses or other potential model parameters, we find evidence for the last of the three hypotheses. Outbreaks do not happen more often in less well-off areas or are more severe (in terms of the number of cases), but they last longer. This indicates that the socio-economic gradient in infection levels is at least in parts a result of a more sustained spread of infections in neighborhoods with worse housing conditions after local outbreaks and suggests that in case of an epidemic allocating scarce resources in containment measures to areas with poor housing conditions might have the greatest benefit.
AU - Freise, Diana
AU - Schiele, Valentin
AU - Schmitz, Hendrik
ID - 46971
IS - 1
JF - Scientific Reports
KW - Multidisciplinary
SN - 2045-2322
TI - Housing situations and local COVID-19 infection dynamics using small-area data
VL - 13
ER -
TY - JOUR
AB - Typically, head fakes in basketball are generated to, and actually do, deteriorate performance on the side of the observer. However, potential costs at the side of the producer of a fake action have only rarely been investigated before. It is thus not clear yet if the benefit (i.e., slowed reactions in the observer) of performing a head fake is overestimated due to concurrently arising fake production costs (i.e., slowed performance in the producer of a head fake). Therefore, we studied potential head-fake production costs with two experiments. Novice participants were asked to generate passes to the left or right side, either with or without head fakes. In Experiment 1, these actions were determined by an auditory stimulus (i.e., a 440 Hz or 1200 Hz sinus or jigsaw wave). After an interstimulus interval (ISI) of either 0 ms, 800 ms, or 1500 ms, which served the preparation of the action, the cued action had to be executed. In Experiment 2, passing to the left or right, either with or without a head fake, was determined by a visual stimulus (i.e., a player with a red or blue jersey defending either the right or left side). After an ISI of either 0 ms, 400 ms, 800 ms, or 1200 ms, the cued action had to be executed. In both experiments, we observed higher reaction times (RTs) for passes with head fakes as compared to passes without head fakes for no and an intermediate preparation interval (from ISI 0 ms to 800 ms), but no difference for a long preparation interval (for an ISI of 1200 ms and 1500 ms). Both experiments show that generating fake actions produces performance costs, however, these costs can be overcome by a longer preparation phase before movement execution.
AU - Güldenpenning, Iris
AU - Weigelt, Matthias
AU - Böer, Nils Tobias
AU - Kunde, Wilfried
ID - 37466
JF - Human Movement Science
KW - Experimental and Cognitive Psychology
KW - Orthopedics and Sports Medicine
KW - General Medicine
KW - Biophysics
SN - 0167-9457
TI - Producing deceptive actions in sports: The costs of generating head fakes in basketball
VL - 87
ER -
TY - CHAP
AU - Pepin, Birgit
AU - Kock, Zeger-jan
AU - Rezat, Sebastian
ED - Pepin, Birgit
ED - Gueudet, Ghislaine
ED - Choppin, Jeff
ID - 46987
SN - 2197-1951
T2 - Handbook of Digital Resources in Mathematics Education
TI - Toward Student Agency in the Selection and Use of Digital Resources for Learning and Studying Mathematics
ER -
TY - CHAP
AB - The thesis of this paper is that a new kind of epistemology evolves from the use of artificial intelligence. The path it takes changes our understanding of the world, of human values and also of science and will be irreversible. The question that arises is whether this form of intelligence also influences our knowledge structure. By this I mean the area that we outline philosophically as the epistemological area. So the question is, under these circumstances, is the way we gain knowledge
today still comparable to the definitions that philosophy has provided us with for centuries? The answer is: No! The paper sketches in broad outlines what the cornerstones of change will be and what consequences this will have for our way of
understanding.
AU - Hagengruber, Ruth
ID - 47029
SN - 9783111051802
T2 - Women Philosophers on Economics, Technology, Environment, and Gender History
TI - The Third Knowledge Dimension: From a Binary System to a Three-limbed Epistemology
ER -
TY - BOOK
AB - In times of current crisis, the voices of women are needed more than ever. The accumulation of war and environmental catastrophes teaches us that exploitation of people and nature through violent appropriation and enrichment for the sake of short-term self-interest exacts its price.
This book presents contributions on the currently most relevant and most urgent issues: reshaping the economy, environmental problems, technology and the re-reading of history from the non-western and western tradition. With an outlook into the problems of class, race and gender in its intersectional framing, the collection offers a unique overview of current research in these fields and contributes to the renewal and contemporary presentation of feminist thought from partly concrete perspectives with regard to factual issues.
ED - Hagengruber, Ruth
ID - 47027
SN - 9783111051802
TI - Women Philosophers on Economics, Technology, Environment, and Gender History
ER -
TY - CHAP
AU - Hagengruber, Ruth Edith
ID - 47028
SN - 9783111051802
T2 - Women Philosophers on Economics, Technology, Environment, and Gender History
TI - Women Philosophers on Economics, Technology, Environment and Gender History. Shaping the Future – Rethinking the Past.
ER -
TY - CHAP
AU - Kamp, Hermann
ED - Bihrer, Andreas
ED - Szill, Rike
ID - 47040
T2 - Eroberte im Mittelalter. Umbruchssituationen erleben, bewältigen, gestalten
TI - Das Aufbegehren der Eroberten. Absichten, Formen und Deutungen im europäischen Mittelalter (8. bis 14. Jahrhundert)
VL - 39
ER -
TY - CONF
AU - Wecker, Daniel
AU - Yigitbas, Enes
ID - 47050
T2 - Proceedings of the ACM Symposium on Spatial User Interaction (SUI 2023)
TI - Minimizing Eye Movements and Distractions in Head-Mounted Augmented Reality through Eye-Gaze Adaptiveness
ER -
TY - JOUR
AU - Yigitbas, Enes
AU - Schmidt, Maximilian
AU - Bucchiarone, Antonio
AU - Gottschalk, Sebastian
AU - Engels, Gregor
ID - 47051
JF - Science of Computer Programming
TI - GaMoVR: Gamification-Based UML Learning Environment in Virtual Reality
ER -
TY - CONF
AU - Schmidt, Leonard
AU - Yigitbas, Enes
ID - 47057
T2 - Proceedings of the 27th International Workshop on Personalization and Recommendation
TI - Transitional Cross Reality Interfaces for Spatially Demanding Search and Collect Tasks
ER -
TY - CONF
AU - Neumayr, Thomas
AU - Yigitbas, Enes
AU - Augstein, Mirjam
AU - Herder, Eelco
ID - 47055
T2 - Proceedings of the Mensch & Computer (2023)
TI - ABIS 2023 – 27th International Workshop on Personalization and Recommendation
ER -
TY - JOUR
AB - The reform of the European academic landscape with the introduction of bachelor's and master's degree programs has brought about several profound changes for teaching and assessment in higher education. With regard to the examination system, the shift towards output-oriented teaching is still one of the most significant challenges. Assessments have to be integrated into the teaching and learning arrangements and consistently aligned towards the intended learning outcomes. In particular, assessments should provide valid evidence that learners have acquired competences that are relevant for a specific domain. However, it seems that this didactic goal has not yet been fully achieved in modeling education in computer science. The aim of this study is to investigate whether typical task material used in exercises and exams in modeling education at selected German universities covers relevant competences required for graphical modeling. For this purpose, typical tasks in the field of modeling are first identified by means of a content-analytical procedure. Subsequently, it is determined which competence facets relevant for graphical modeling are addressed by the task types. By contrasting a competence model for modeling with the competences addressed by the tasks, a gap was identified between the required competences and the task material analyzed. In particular, the gap analysis shows the neglect of transversal competence facets as well as those related to the analysis and evaluation of models. The result of this paper is a classification of task types for modeling education and a specification of the competence facets addressed by these tasks. Recommendations for developing and assessing student's competences comprehensively are given.
AU - Soyka, Chantal
AU - Ullrich, Meike
AU - Striewe, Michael
AU - Schaper, Niclas
ID - 47065
JF - Enterprise Modelling and Information Systems Architectures
KW - conceptual modeling
KW - higher education
KW - competence-oriented assessment
KW - task analysis
KW - graphical modeling
TI - Comparison of Required Competences and Task Material in Modeling Education
VL - 18
ER -
TY - CONF
AU - Wotschel, Philipp
AU - Vogelsang, Christoph
AU - Meier, Jana
AU - Janzen, Thomas
ID - 47071
TI - Counselling competence of student teachers – development of an action-oriented assessment format.
ER -
TY - CONF
AU - Janzen, Thomas
AU - Wotschel, Philipp
AU - Meier, Jana
AU - Vogelsang, Christoph
ID - 47067
TI - Assessing pre-service EFL teachers’ feedback performance in role-play-based simulations.
ER -
TY - CONF
AU - Vogelsang, Christoph
AU - Meier, Jana
AU - Janzen, Thomas
AU - Wotschel, Philipp
ID - 47066
TI - Acceptance of simulation-based assessment formats in teacher education.
ER -
TY - CHAP
AU - Newberry, Melissa
AU - Rizvi, Meher
AU - van der Want, Anna
AU - Jonas-Ahrend, Gabriela
AU - Kaldi, Stavroula
AU - Kihara, Toshiyuki
AU - Franco, Juan Vicente Ortiz
AU - Ratnam, Tara
ID - 47074
SN - 1479-3687
T2 - Advances in Research on Teaching
TI - Teacher Educators' Experiences and Expressions of Emotion During the Pandemic: International Perspectives
ER -
TY - JOUR
AU - Schubatzky, Thomas
AU - Burde, Jan-Philipp
AU - Große-Heilmann, Rike Isabel
AU - Haagen-Schützenhöfer, Claudia
AU - Riese, Josef
AU - Weiler, David
ID - 47085
JF - Computers & Education
KW - Education
KW - General Computer Science
SN - 0360-1315
TI - Predicting the development of digital media PCK/TPACK: The role of PCK, motivation to use digital media, interest in and previous experience with digital media
VL - 206
ER -
TY - GEN
AB - Informationen sind für eine erfolgreiche Klimapolitik in doppelter Hinsicht wichtig: Sie werden benötigt, wenn Potenziale zur Vermeidung von Emissionen identifiziert und klimapolitische Instrumente ausgewählt werden. Und sie sind zentral, damit Bürger/innen selbst Entscheidungen im Sinne des Klimaschutzes treffen können.
AU - Frick, Marc
AU - Foese, Dario
AU - Von Graevenitz, Kathrine
AU - Kesternich, Martin
AU - Wagner, Ulrich
ID - 47082
KW - General Medicine
SN - 1430-8800
TI - Die Doppelwirkung von Information für klimafreundliches Handeln
VL - 38
ER -
TY - GEN
AU - Beverungen, Daniel
AU - zur Heiden, Philipp
AU - Lehrer, Christiane
AU - Trier, Matthias
AU - Bartelheimer, Christian
AU - Bradt, Tobias
AU - Distel, Bettina
AU - Drews, Paul
AU - Ehmke, Jan Fabian
AU - Fill, Hans-Georg
AU - Flath, Christoph M.
AU - Fridgen, Gilbert
AU - Grisold, Thomas
AU - Janiesch, Christian
AU - Janson, Andreas
AU - Krancher, Oliver
AU - Krönung, Julia
AU - Kundisch, Dennis
AU - Márton, Attila
AU - Mirbabaie, Milad
AU - Morana, Stefan
AU - Mueller, Benjamin
AU - Müller, Oliver
AU - Oberländer, Anna Maria
AU - Peters, Christoph
AU - Peukert, Christoph
AU - Reuter-Oppermann, Melanie
AU - Riehle, Dennis M.
AU - Robra-Bissantz, Susanne
AU - Röglinger, Maximilian
AU - Rosenthal, Kristina
AU - Schryen, Guido
AU - Schütte, Reinhard
AU - Strahringer, Susanne
AU - Urbach, Nils
AU - Wessel, Lauri
AU - Zavolokina, Liudmila
AU - Zschech, Patrick
ID - 47107
TI - Implementing Digital Responsibility through Information Systems Research: A Delphi Study of Objectives, Activities, and Challenges in IS Research
ER -
TY - CONF
AB - Modern companies often face various challenges in concept development of products or systems. Design engineers prepare initial concepts as 3D models. These are then simulated by computational engineers. If requirements are not met, this necessitates an iterative process that runs between the design and computation departments until a valid concept is created. Design methods such as topology optimization are often used here. The upcoming result is then attempted to be adapted to certain manufacturing processes. These iteration loops can sometimes take a very long time, since the model construction and structural optimization generate large computational efforts. The present work shows on an example a methodical approach, which represents a first proof of concept, to solving this problem, including a description of methods and techniques, as well as possible problems in a detailed analysis concerning training data for neural networks and their abstraction capabilities. It is evident that additional research work needs to be conducted for further utilization in order to address all arising questions.
AU - Ott, Manuel
AU - Meihöfener, Niclas
AU - Mozgova, Iryna
ED - Ott, Manuel
ID - 46957
T2 - Proceedings of the 34rd Annual International Solid Freeform Fabrication Symposium 2023
TI - Methodical Approach to Reducing Design Time by using Neural Networks in Early Stages of Concept Development
ER -
TY - CONF
AU - Gräßler, Iris
AU - Tusek, Alena Marie
AU - Özcan, Deniz
ID - 46490
SN - 9783181024195
T2 - Automation 2023
TI - Entwicklung zukunftsfähiger Geschäftsmodelle in der Automatisierungstechnik anhand von Megatrends
VL - 2419
ER -
TY - CHAP
AU - Dehmel, Lukas
AU - Meister, Dorothee
ED - Kamin, Anna-Maria
ED - Holze, Jens
ED - Wilde, Melanie
ED - Rummler, Klaus
ED - Dander, Valentin
ED - Grünberger, Nina
ED - Schiefner-Rohs, Mandy
ID - 47110
T2 - Jahrbuch Medienpädagogik 20. Inklusive Medienbildung in einer mediatisierten Welt. Medienpädagogische Perspektiven auf ein interprofessionelles Forschungsfeld.
TI - Aushandlungen von Inklusion und Exklusion im Kontext der (nicht-)Verfügbarkeit mobiler Medien. Ein rekonstruktiver Blick auf die Mediatisierung berufsschulischer Möglichkeitsräume.
ER -
TY - JOUR
AB - AbstractFeCo alloys are important materials used in pumps and motors in the offshore oil and gas drilling industry. These alloys are subjected to marine environments with a high NaCl concentration, therefore, corrosion and catastrophic failure are anticipated. So, the surface dissolution of additively manufactured FeCo samples is investigated in a quasi-in situ manner, in particular, the pitting corrosion in 5.0 wt pct NaCl solution. The local dissolution of the same sample region is monitored after 24, 72, and 168 hours. Here, the formation of rectangular and circular pits of ultra-fine dimensions (less than 0.5 µm) is observed with increasing immersion time. In addition, the formation of a corrosion-inhibiting surface layer is detected on the sample surface. Surface dissolution leads to a change in the surface structure, however, no change in grain shape or grain size is noticed. The surface topography after local dissolution is correlated to the grain orientation. Quasi-in situ analysis shows the preferential dissolution of high-angle grain boundaries (HAGBs) leading to a change in the fraction of HAGBs and low-angle grain boundaries fraction (LAGBs). For the FeCo sample, a potentiodynamic polarisation test reveals a corrosion potential (Ecorr) of − 0.475 V referred to the standard hydrogen electrode (SHE) and a corrosion exchange current density (icorr) of 0.0848 A/m2. Furthermore, quasi-in situ experiments showed that grains oriented along certain crystallographic directions are corroding more compared to other grains leading to a significant decrease in the local surface height. Grains with a plane normal close to the $$\langle {1}00\rangle$$
⟨
100
⟩
direction reveal lower surface dissolution and higher corrosion resistance, whereas planes normal close to the $$\langle {11}0\rangle$$
⟨
110
⟩
direction and the $$\langle {111}\rangle$$
⟨
111
⟩
direction exhibit a higher surface dissolution.
AU - Pramanik, Sudipta
AU - Krüger, Jan Tobias
AU - Schaper, Mirko
AU - Hoyer, Kay-Peter
ID - 47122
JF - Metallurgical and Materials Transactions A
KW - Metals and Alloys
KW - Mechanics of Materials
KW - Condensed Matter Physics
SN - 1073-5623
TI - Quasi-In Situ Localized Corrosion of an Additively Manufactured FeCo Alloy in 5 Wt Pct NaCl Solution
ER -
TY - JOUR
AB - Trotz der Annahme, dass Langzeitpraktika im Lehramts-studium hohe Belastungen für Studierende darstellen können, sind empirische Analysen zum Einfluss sozialer (z.B. die Betreuung eigener Kinder, Pflegeaufgaben) und organisationaler Bedingungsfaktoren (z.B. Erwerbstätigkeit, Fahrzeiten zur Praktikumsschule, Zusatzkosten) rar. Daher wurden in diesem Beitrag im Rahmen einer Sekundäranalyse evaluativer Daten Zusammenhänge zwischen dem Belastungserleben von N = 611 Lehramtsstudierenden im Praxissemester an der Universität Paderborn und verschiedenen Bedingungsfaktoren untersucht. Das Belastungserleben wurde vor und nach dem Praxissemester mit Hilfe des Maslach-Burnout-Inventars (MBI-SS) erfasst. Regressionsanalysen ergaben, dass soziale und organisationale Bedingungsfaktoren kaum Unterschiede im Belastungserleben aufklären. Als einzige bedeutende Faktoren mit kleinen Effekten erwiesen sich die Fahrzeit zur Praktikumsschule und die Höhe evtl. zusätzlicher Materialkosten. Auch durch Clusteranalysen ermittelte Gruppen von hochbelasteten Studierenden zeichnen sich nicht durch spezifische soziale oder organisationale Bedingungsfaktoren aus.
AU - Vogelsang, Christoph
AU - Brandhorst, André
ID - 47117
IS - 1
JF - Herausforderung Lehrer* Innenbildung-Zeitschrift Zur Konzeption, Gestaltung Und Diskussion
KW - Praxissemester
KW - Belastung
KW - Burnout
KW - Lehramtsstudium
KW - soziale Situation
TI - Schulpraktikum zwischen Kind und Nebenjob? Einfluss von sozialen und organisationalen Bedingungsfaktoren auf das Belastungserleben Lehramtsstudierender im Praxissemester
VL - 6
ER -
TY - CONF
AU - Seutter, Janina
ID - 45459
TI - The Origination of Online Reviews in B2B Markets: A Qualitative Study on the Underlying Motives of Review Writers
ER -
TY - JOUR
AU - Wu, Shuang
AU - Delp, Alexander
AU - Freund, Jonathan
AU - Walther, Frank
AU - Haubrich, Jan
AU - Löbbecke, Miriam
AU - Tröster, Thomas
ID - 46495
JF - The Journal of Adhesion
KW - Materials Chemistry
KW - Surfaces
KW - Coatings and Films
KW - Surfaces and Interfaces
KW - Mechanics of Materials
KW - General Chemistry
SN - 0021-8464
TI - Adhesion properties of the hybrid system made of laser-structured aluminium EN AW 6082 and CFRP by co-bonding-pressing process
ER -
TY - JOUR
AU - Freund, Jonathan
AU - Löbbecke, Miriam
AU - Delp, Alexander
AU - Walther, Frank
AU - Wu, Shuang
AU - Tröster, Thomas
AU - Haubrich, Jan
ID - 46494
JF - The Journal of Adhesion
KW - Materials Chemistry
KW - Surfaces
KW - Coatings and Films
KW - Surfaces and Interfaces
KW - Mechanics of Materials
KW - General Chemistry
SN - 0021-8464
TI - Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints
ER -
TY - JOUR
AB - AbstractSupplementing an earlier analysis of event‐related potentials in extensive motor learning (Margraf et al., 2022a, 2022b), frontal theta‐band activity (4–8 Hz) was scrutinized. Thirty‐seven participants learned a sequential arm movement with 192 trials in each of five practice sessions. Feedback, based on a performance adaptive bandwidth, was given after every trial. Electroencephalogram (EEG) was recorded in the first and last practice sessions. The degree of motor automatization was tested under dual‐task conditions in a pre‐test–post‐test design. Quantitative error information was transported in both feedback conditions (positive and negative). Frontal theta activity was discussed as a general signal that cognitive control is needed and, therefore, was expected to be higher after negative feedback. Extensive motor practice promotes automatization, and therefore, decreased frontal theta activity was expected in the later practice. Further, it was expected that frontal theta was predictive for subsequent behavioural adaptations and the amount of motor automatization. As the results show, induced frontal theta power was higher after negative feedback and decreased after five sessions of practice. Moreover, induced theta activity was predictive for error correction and, therefore, an indicator of whether the recruited cognitive resources successfully induced behavioural adaptations. It remains to be solved why these effects, which fit well with the theoretical assumptions, were only revealed by the induced part of frontal theta activity. Further, the amount of theta activity during practice was not predictive for the degree of motor automatization. It seems that there might be a dissociation between attentional resources associated with feedback processing and attentional resources associated with motor control.
AU - Margraf, Linda
AU - Krause, Daniel
AU - Weigelt, Matthias
ID - 46868
IS - 8
JF - European Journal of Neuroscience
KW - General Neuroscience
SN - 0953-816X
TI - Frontal theta reveals further information about neural valence‐dependent processing of augmented feedback in extensive motor practice - A secondary analysis
VL - 57
ER -
TY - GEN
AU - Margraf, Linda
AU - Krause, Daniel
AU - Weigelt, Matthias
ED - Schott, N.
ED - Klotzbier, T.
ED - Korbus, H.
ED - El-Rajab, I.
ED - Holfelder, B.
ED - Gomolinsky, U.
ED - Park, S-Y.
ID - 47125
TI - Frontal theta reveals further information about neural valence-dependent processing of augmented feedback in extensive motor practice.
ER -
TY - CONF
AU - Kruse, Stephan
AU - Meinecke, Marc-Michael
AU - Kneuper, Pascal
AU - Schwabe, Tobias
AU - Kurz, Heiko G.
AU - Scheytt, J. Christoph
ID - 47124
T2 - 2023 20th European Radar Conference (EuRAD)
TI - Analysis and Simulation of a Coherent FMCW Lidar-Photonic Radar Combined Sensor System for Large Aperture Phased Array MIMO
ER -
TY - JOUR
AB - Purpose: The aim of this study was to examine whether cortical activity changes during exercise with increasing cognitive demands in preadolescent children. Method: Twenty healthy children (8.75 [0.91] y) performed one movement game, which was conducted with lower and higher cognitive demands. During a baseline measurement and both exercise conditions, cortical activity was recorded using a 64-channel electroencephalographic system, and heart rate was assessed. Ratings of perceived excertion and perceived cognitive engagement were examined after each condition. To analyze power spectral density in the theta, alpha-1, and alpha-2 frequency bands, an adaptive mixture independent component analysis was used to determine the spatiotemporal sources of cortical activity, and brain components were clustered to identify spatial clusters. Results: One-way repeated-measures analyses of variance revealed significant main effects for condition on theta in the prefrontal cluster, on alpha-1 in the prefrontal, central, bilateral motor, bilateral parieto-occipital, and occipital clusters, and on alpha-2 in the left motor, central, and left parieto-occipital clusters. Compared with the lower cognitive demand exercise, cortical activity was significantly higher in theta power in the prefrontal cluster and in alpha-1 power in the occipital cluster during the higher cognitive demand exercise. Conclusion: The present study shows that exercise complexity seems to influence cortical processing as it increased with increasing cognitive demands.
AU - Becker, Linda
AU - Büchel, Daniel
AU - Lehmann, Tim
AU - Kehne, Miriam
AU - Baumeister, Jochen
ID - 43061
JF - Pediatric Exercise Science
KW - Physical Therapy
KW - Sports Therapy and Rehabilitation
KW - Orthopedics and Sports Medicine
KW - Pediatrics
KW - Perinatology and Child Health
SN - 0899-8493
TI - Mobile Electroencephalography Reveals Differences in Cortical Processing During Exercises With Lower and Higher Cognitive Demands in Preadolescent Children
ER -
TY - JOUR
AU - Strotmeyer, Anne
AU - Ortwein, Lena
AU - Kehne, Miriam
ID - 42717
IS - 1
JF - Playground@Landscape
TI - Spielplatzgeräte: Potenziale zur ganzheitlichen Förderung von Heranwachsenden
ER -
TY - GEN
AU - Wickemeyer, Carolin
AU - Güldenpenning, Iris
AU - Weigelt, Matthias
ED - Merz, Simon
ED - Frings, Christian
ED - Leuchtenberg, Bettina
ED - Moeller, Birte
ED - Mueller, Stefanie
ED - Neumann, Roland
ED - Pastötter, Bernhard
ED - Pingen, Leah
ED - Schui, Gabriel
ID - 46985
T2 - Abstracts of the 65th Conference of Experimental Psychologists (TeaP)
TI - Response inhibition for the basketball jump shot: Using the "stop before eight" paradigm
ER -
TY - JOUR
AU - Güldenpenning, Iris
AU - Jackson, Robin C.
AU - Cañal-Bruland, Rouwen
ID - 47130
JF - Human Movement Science
TI - The science of deceptive human movement
VL - 92
ER -
TY - GEN
AU - Güldenpenning, Iris
AU - Kunde, W.
AU - Weigelt, Matthias
ED - Schott, N.
ED - Klotzbier, T.
ED - Korbus, H.
ED - El-Rajab, I.
ED - Holfelder, B.
ED - Gomolinsky, U.
ED - Park, S.-Y.
ID - 47033
T2 - Human Performance – Assessment, Intervention & Analysen. Abstractband der 55. Jahrestagung der Arbeitsgemeinschaft für Sportpsychologie (asp)
TI - Der Einfluss von kognitiver Belastung auf den Blicktäuschungseffekt im Basketball
ER -
TY - GEN
AU - Wickemeyer, Carolin
AU - Güldenpenning, Iris
AU - Weigelt, Matthias
ED - Schott, Nadja
ED - Korbus, Heide
ED - Klotzbier, Thomas
ED - El-Rajab, Inaam
ED - Holfelder, Benjamin
ED - Gomolinsky, Uwe
ED - Park, Soo-Yong
ID - 46986
T2 - Human Performance – Assessment, Intervention & Analysen. Abstractband der 55. Jahrestagung der Arbeitsgemeinschaft für Sportpsychologie (asp)
TI - Response inhibition for the basketball pump fake
ER -
TY - CHAP
AU - Weigelt, Matthias
AU - Krause, Daniel
AU - Güldenpenning, Iris
ED - Schüler, J.
ED - Wegner, M.
ED - Plessner, H.
ED - Eklund, R. C.
ID - 47059
SN - 9783031039201
T2 - Sport and Exercise Psychology
TI - Learning and Memory in Sports
ER -
TY - JOUR
AB - The structural stability of DNA origami nanostructures in various chemical environments is an important factor in numerous applications, ranging from biomedicine and biophysics to analytical chemistry and materials synthesis. In...
AU - Hanke, Marcel
AU - Dornbusch, Daniel
AU - Tomm, Emilia
AU - Grundmeier, Guido
AU - Fahmy, Karim
AU - Keller, Adrian
ID - 47140
JF - Nanoscale
KW - General Materials Science
SN - 2040-3364
TI - Superstructure-dependent stability of DNA origami nanostructures in the presence of chaotropic denaturants
ER -
TY - GEN
AU - Deppe, Volker
ID - 47134
TI - Routing in Hypergraphs
ER -
TY - JOUR
AB - The development of good conditions for research is an essential task of research institutions, which in practice is nowadays mostly performed by science managers. Research in the field of science management in Germany mainly refers to developments at universities, whereas little is known about the situation at so called non-university research organisations. At the same time, there are hardly any statistics on the size of the science management in Germa-ny. In order to take first steps towards exploring these parallel universes, this article presents a comparative mapping of science management at universities and non-university research organisations for Germany by drawing on a special analysis of the German Federal Statistical Office and an online survey.
AU - Schneider, Sebastian
AU - Mauermeister, Sylvi
AU - Henke, Justus
AU - Aust, Robert
ID - 47141
IS - 18
JF - Hochschulmanagement. Zeitschrift für die Leitung, Entwicklung und Selbstverwaltung von Hochschulen und Wissenschaftseinrichtungen.
TI - Parallele Universen des Wissenschaftsmanagements? Ein Vergleich des Wissenschaftsmanagements an Hochschulen und außeruniversitären Forschungseinrichtungen in Deutschland.
VL - 1
ER -
TY - CHAP
AU - Göbel, Claudia
AU - Henke, Justus
AU - Mauermeister, Sylvi
AU - Pasternack, Peer
ED - Pasternack, Peer
ID - 47142
SN - 978-3-658-39177-5
T2 - Wissenschaftskommunikation, neu sortiert.
TI - Citizen Science: Laien-Partizipation an Forschung
ER -
TY - JOUR
AU - de Angelis, Moira
AU - Harles, Dorothea
AU - Mauermeister, Sylvi
AU - Aust, Robert
ID - 47139
IS - 71
JF - Das Hochschulwesen
SN - 0018-2974
TI - Gesellschaftlich-demokratische Teilhabe: trotz hochschulischer oder durch hochschulische Bildung?
VL - 1+2
ER -
TY - GEN
AU - Lishkova, Yana
AU - Ober-Blöbaum, Sina
AU - Leyendecker, Sigrid
ID - 47147
TI - Multirate Discrete Mechanics and Optimal Control for a Flexible Satelite Model
ER -
TY - CONF
AU - Lishkova, Y.
AU - Bando, M.
AU - Ober-Blöbaum, Sina
ID - 47148
TI - Variational approach for modelling and optimal control of electrodynamic tether motion
ER -
TY - JOUR
AB - »Über Geld spricht man nicht.« Diese Benimmregel erweist sich beim Blick in die Ver-
gangenheit als Illusion. Keineswegs war Geld grundsätzlich ein Tabuthema zwischen-
menschlicher Kommunikation. Ganz im Gegenteil: Mit dem Reden über Geld wird dieses
mit Bedeutung aufgeladen. Die Autor*innen dieses Themenheftes untersuch en Gelddis-
kurse und die Zuschreibungen von Bedeutung an Geld in der internationalen Geschichte.
AU - Schönhärl, Korinna
AU - Schotters, Frederike
AU - Thiemeyer, Guido
ID - 47155
JF - Werkstatt Geschichte
KW - Financial History
KW - Discourse Analysis
KW - History of Money
TI - Editorial
VL - 88
ER -
TY - CHAP
AB - Ob als Effekt staatlicher Hilfspakete, als kontroverses Thema des EU-Haushalts oder als mögliche Ursache der rasant steigenden Inflation – in einer Welt im Krisenmodus ist das Problem der Staatsverschuldung aktuell wie selten zuvor. Wie und von wem aber werden Staatsschulden tatsächlich »gemacht«? Und wie stellt sich dies in der historischen Perspektive dar? Die Essays dieses Bandes machen das abstrakte Phänomen der öffentlichen Verschuldung und die verborgenen Prozesse hinter den Schuldenquoten zugänglich. Prägende Praktiken der Staatsverschuldung verdeutlichen die Beiträge anhand von fünf Kategorien: den beteiligten Akteuren, den konkreten Artefakten, den politischen Debatten, den globalen Relationen sowie der Zeitlichkeit der Verschuldung der öffentlichen Haushalte.
AU - Schönhärl, Korinna
ED - Logemann, Jan
ED - Middendorf, Stefanie
ED - Rischbieter, Laura
ID - 47157
KW - Financial History
KW - Public Debt
KW - Economic History
T2 - Schulden machen: Praktiken der Staatsverschuldung im langen 20. Jahrhundert
TI - Internationale Finanzkontrollen: Griechenland unter internationaler Kuratel im 19. und 21. Jahrhundert
ER -
TY - JOUR
AB - When it comes to mastering the digital world, the education system is more and more facing the task of making students competent and self-determined agents when interacting with digital artefacts. This task often falls to computing education. In the traditional fields of computing education, a plethora of models, guidelines, and principles exist, which help scholars and teachers identify what the relevant aspects are and which of them one should cover in the classroom. When it comes to explaining the world of digital artefacts, however, there is hardly any such guiding model. The ARIadne model introduced in this paper provides a means of explanation and exploration of digital artefacts which help teachers and students to do a subject analysis of digital artefacts by scrutinizing them from several perspectives. Instead of artificially separating aspects which target the same phenomena within different areas of education (like computing, ICT or media education), the model integrates technological aspects of digital artefacts and the relevant societal discourses of their usage, their impacts and the reasons behind their development into a coherent explanation model.
AU - Winkelnkemper, Felix
AU - Höper, Lukas
AU - Schulte, Carsten
ID - 47151
JF - Informatics in Education
KW - Computer Science Applications
KW - Communication
KW - Education
KW - General Engineering
SN - 1648-5831
TI - ARIadne – An Explanation Model for Digital Artefacts
ER -
TY - GEN
AB - »Über Geld spricht man nicht.« Diese Benimmregel erweist sich beim Blick in die Vergangenheit als Illusion. Keineswegs war Geld grundsätzlich ein Tabuthema zwischenmenschlicher Kommunikation. Ganz im Gegenteil: Mit dem Reden über Geld wird dieses mit Bedeutung aufgeladen. Die Autor*innen dieses Themenheftes untersuchen Gelddiskurse und die Zuschreibungen von Bedeutung an Geld in der internationalen Geschichte.
ED - Schönhärl, Korinna
ED - Schotters, Frederike
ED - Thiemeyer, Guido
ID - 47154
KW - Financial History
KW - Discourse Analysis
KW - History of Money
T2 - Werkstatt Geschichte
TI - Reden über Geld
VL - 88
ER -
TY - CONF
AU - Yigitbas, Enes
AU - Witalinski, Iwo
AU - Gottschalk, Sebastian
AU - Engels, Gregor
ID - 47150
T2 - Proceedings of the 24th International Conference on Product-Focused Software Process Improvement (PROFES 2023)
TI - Virtual Reality Collaboration Platform for Agile Software Development
ER -
TY - GEN
AU - Böer, Nils Tobias
AU - Weigelt, Matthias
AU - Kunde, Wilfried
AU - Güldenpenning, Iris
ED - Schott, Nadja
ED - Klotzbier, Thomas
ED - Korbus, Heide
ED - El-Rajab, I.
ED - Holfelder, B.
ED - Park, S-Y.
ID - 44694
KW - Perception
KW - Action Preparation
KW - Cognition
T2 - Human Performance – Assessment, Intervention & Analysen. Abstractband der 55. Jahrestagung der Arbeitsgemeinschaft für Sportpsychologie (asp)
TI - The influence of effort instructions on the production of head fakes in basketball
ER -
TY - GEN
AU - Böer, Nils Tobias
AU - Weigelt, Matthias
AU - Güldenpenning, Iris
ED - Merz, Simon
ED - Frings, Christian
ED - Leuchtenberg, Bettina
ED - Moeller, Birte
ED - Mueller, Stefanie
ED - Neumann, Roland
ED - Pastötter, Bernhard
ED - Pingen, Leah
ED - Schui, Gabriel
ID - 45779
KW - perception
KW - action preparation
KW - movement planning
KW - effort instructions
T2 - Abstracts of the 65th Conference of Experimental Psychologists (TeaP)
TI - The influence of effort instructions on producing head fakes in basketball
ER -
TY - CONF
AB - Modelling of dynamic systems plays an important role in many engineering disciplines. Two different approaches are physical modelling and data‐driven modelling, both of which have their respective advantages and disadvantages. By combining these two approaches, hybrid models can be created in which the respective disadvantages are mitigated, with discrepancy models being a particular subclass. Here, the basic system behaviour is described physically, that is, in the form of differential equations. Inaccuracies resulting from insufficient modelling or numerics lead to a discrepancy between the measurements and the model, which can be compensated by a data‐driven error correction term. Since discrepancy methods still require a large amount of measurement data, this paper investigates the extent to which a single discrepancy model can be trained for a physical model with additional parameter dependencies without the need for retraining. As an example, a damped electromagnetic oscillating circuit is used. The physical model is realised by a differential equation describing the electric current, considering only inductance and capacitance; dissipation due to resistance is neglected. This creates a discrepancy between measurement and model, which is corrected by a data‐driven model. In the experiments, the inductance and the capacity are varied. It is found that the same data‐driven model can only be used if additional parametric dependencies in the data‐driven term are considered as well.
AU - Wohlleben, Meike Claudia
AU - Muth, Lars
AU - Peitz, Sebastian
AU - Sextro, Walter
ID - 46813
KW - Electrical and Electronic Engineering
KW - Atomic and Molecular Physics
KW - and Optics
SN - 1617-7061
T2 - Proceedings in Applied Mathematics and Mechanics
TI - Transferability of a discrepancy model for the dynamics of electromagnetic oscillating circuits
ER -
TY - CONF
AB - This paper presents a comprehensive study on diagnosing a spacecraft propulsion system utilizing data provided by the Prognostics and Health Management (PHM) society, specifically obtained as part of the Asia-Pacific PHM conference’s data challenge 2023. The objective of the challenge is to identify and diagnose known faults as well as unknown anomalies in the spacecraft’s propulsion system, which is critical for ensuring the spacecraft’s proper functionality and safety. To address this challenge, the proposed method follows a systematic approach of feature extraction, feature selection, and model development. The models employed in this study are kMeans clustering and decision trees combined to ensembles, enriched with expert knowledge. With the method presented, our team was capable of reaching high accuracy in identifying anomalies as well as diagnosing faults, resulting in attaining the seventh place with a score of 93.08 %.
AU - Aimiyekagbon, Osarenren Kennedy
AU - Löwen, Alexander
AU - Bender, Amelie
AU - Muth, Lars
AU - Sextro, Walter
ID - 47116
IS - 1
KW - PHM
KW - Fault Diagnostics
KW - Multiple Fault Modes
KW - Expert-Informed Diagnostics
KW - Anomaly Detection
T2 - Proceedings of the Asia Pacific Conference of the PHM Society 2023
TI - Expert-Informed Hierarchical Diagnostics of Multiple Fault Modes of a Spacecraft Propulsion System
VL - 4
ER -
TY - CHAP
AB - Physics textbooks are generally viewed as important tools that provide well-presented and reliable information that supports and enhances students' understanding of critical concepts. The main goal of this chapter is to find out what attention has been given to textbook evaluation in physics education research literature. Studies about physics textbooks from different countries and different eras are discussed and analyzed, and a broad overview about aspects that influence the efficacy of physics textbooks are presented. Research papers that discuss the importance and influence of digital textbooks (and similar technological resources) are also analyzed.
AU - Kapanadze, Marika
AU - Jonas-Ahrend, Gabriela
AU - Mazzolini, Alexander
AU - Joubran, Fadeel
ID - 47075
SN - 9780735425484
T2 - The International Handbook of Physics Education Research: Special Topics
TI - Evaluation of Physics Textbooks
ER -
TY - JOUR
AB - Zusammenfassung
Aufgrund aktueller Transformationsprozesse kommt der automatisierten und ressourceneffizienten Fertigung hochfester Leichtbauteile eine steigende Bedeutung zu, beispielsweise im Flugzeug- und Fahrzeugbau. Für kleine Losgrößen bietet sich hier insbesondere das Fertigungsverfahren des Drückwalzens an. Der konventionelle, industriell genutzte Drückwalzprozess stößt allerdings aufgrund der Prozesskomplexität hinsichtlich der Reproduzierbarkeit an seine Grenzen. Dies wird in der Praxis teilweise durch personengebundenes Erfahrungswissen kompensiert. Auch ist es nicht möglich, Bauteileigenschaften definiert einzustellen. Aus diesem Grund bietet der Einsatz einer neuartigen Eigenschaftsregelung Chancen zur Weiterentwicklung des Fertigungsprozesses und die Möglichkeit zur Prozessautomatisierung. Hier werden die Werkzeugbahnen abhängig einer Online-Eigenschaftsmessung über eine zusätzliche Reglerkaskade manipuliert. Die Entwicklung einer solchen Eigenschaftsregelung erfordert den Einsatz geeigneter, modellbasierter Entwurfsmethoden. In diesem Beitrag wird daher ein regelungstechnisches Systemmodell für das Drückwalzen metastabiler austenitischer Edelstähle vorgestellt. Das Simulationsmodell weist aufgrund seiner Echtzeitfähigkeit neben dem Einsatz als reines Entwurfsmodell weitere Nutzungsmöglichkeiten z.B. in Beobachtern auf und grenzt sich somit von domänenspezifischen Simulationstools wie der FEM ab.
AU - Kersting, Lukas
AU - Arian, Bahman
AU - Rozo Vasquez, Julian
AU - Trächtler, Ansgar
AU - Homberg, Werner
AU - Walther, Frank
ID - 44312
IS - 1
JF - at - Automatisierungstechnik
KW - Electrical and Electronic Engineering
KW - Computer Science Applications
KW - Control and Systems Engineering
SN - 0178-2312
TI - Echtzeitfähige Modellierung eines innovativen Drückwalzprozesses für die eigenschaftsgeregelte Bauteilfertigung
VL - 71
ER -