TY - CONF
AB - Abstract. Climate change, rare resources and industrial transformation processes lead to a rising demand of multi-complex lightweight forming parts, especially in aerospace and automotive sectors. In these industries, flow forming is often used to produce cylindrical forming parts by reducing the wall thickness of tubular semifinished parts, e.g. for the production of hydraulic cylinders or gear shafts. The complexity and functionality of flow forming workpieces could be significantly increased by locally graded microstructure and geometry structures. This enables customized complex hardness distributions at wear surfaces or magnetic QR codes for a unique, tamper-proof product identification. The production of those complex, 2D (axial and angular) graded forming parts currently depicts a great challenge for the process and requires new solutions and strategies. Hence, this paper proposes a novel control strategy that includes online measurements from an absolute encoder to determine the angular workpiece position. Workpieces of AISI 304L stainless steel with 2D-graded structures are successfully manufactured using this new strategy and analyzed regarding the possible accuracy and resolution of the gradation. At this point, a dependency of the gradations on the sensor and actuator dynamics, accuracy and geometry could be noted. It is further evaluated how the control strategy could be extended by an observer-based closed-loop property control approach to enhance the accuracy of the suggested strategy.
AU - Kersting, Lukas
AU - Arian, Bahman
AU - Rozo Vasquez, Julian
AU - Trächtler, Ansgar
AU - Homberg, Werner
AU - Walther, Frank
ID - 44315
SN - 2474-395X
T2 - Materials Research Proceedings
TI - Control strategy for angular gradations by means of the flow forming process
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 - 45652
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 - Rozo Vasquez, Julian
AU - Arian, Bahman
AU - Kersting, Lukas
AU - Walther, Frank
AU - Homberg, Werner
AU - Trächtler, Ansgar
ID - 44318
JF - Metals
TI - Detection of phase transformation during plastic deformation of metastable austenitic steel AISI 304L by means of X-ray diffraction pattern analysis
ER -
TY - GEN
AU - Thorenz, Kristin
AU - Berwinkel, Andre
AU - Weigelt, Matthias
ED - Schlesinger, Torsten
ED - Grimminger-Seidensticker, Elke
ED - Ferrauti, Alexander
ED - Kellmann, Michael
ED - Thiel, Christian
ED - Kullik, Lisa
ID - 47418
SN - 978-3-88020-714-1
T2 - Leistung steuern. Gesundheit stärken. Entwicklung fördern.
TI - The affective response following autogenic training
VL - 301
ER -
TY - CHAP
AU - Biehler, Rolf
AU - Engel, Joachim
AU - Frischemeier, Daniel
ED - Bruder, Regina
ED - Büchter, A.
ED - Gasteiger, H.
ED - Schmidt-Thieme, B.
ED - Weigand, HG.
ID - 47416
SN - 9783662666036
T2 - Handbuch der Mathematikdidaktik
TI - Stochastik: Leitidee Daten und Zufall
ER -
TY - JOUR
AU - Methfessel, Annette
AU - Janzen, Thomas
ID - 47423
IS - 2
JF - Englisch betrifft uns
TI - Living the Dream? Relating to the living conditions of Hispanic migrants in California through the short story Inside Out
ER -
TY - CHAP
AU - Rezat, Sara
ED - von Heynitz, Martina
ID - 47450
T2 - Die Konstruktion stärken: Ein Handlungsfeld der Deutschdidaktik neu betrachtet
TI - Konstruktionen in der prozedurenorientierten Schreibdidaktik.
ER -
TY - JOUR
AU - Rezat, Sara
AU - Scholle, Oliver
ID - 47451
IS - (1)
JF - Medien im Deutschunterricht
TI - AnnoPy – Ein digitales Tool zur Förderung von Textkompetenzen.
VL - 5
ER -
TY - CONF
AB - In this paper we present a new system architecture for software-defined radio / radar with optical signal distribution. The proposed architecture allows to transmit the optical carrier and an arbitrary IQ signal on the same fiber from a base station to wireless transmitters using a single laser. Furthermore, we can reuse parts, and under special conditions, also the complete optical output of the base station for the IQ return path from the wireless receiver frontends to the base station. Avoiding multiple lasers and fibers for the distribution of the carrier and arbitrary signal from the base station to the frontend, and avoiding the laser diode for the IQ return path from receiver frontends to the base station reduces the hardware effort significantly. Finally, the system architecture allows to integrate all components of the optoelectronic wireless frontend in a single chip using silicon photonics technology.
AU - Kruse, Stephan
AU - Kneuper, Pascal
AU - Schwabe, Tobias
AU - Meinecke, Marc-Michael
AU - Kurz, Heiko G.
AU - Scheytt, J. Christoph
ID - 42800
TI - Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution
ER -
TY - JOUR
AU - Kruse, Stephan
AU - Greitens, Jan C.
AU - Schwabe, Tobias
AU - Kneuper, Pascal
AU - Kurz, Heiko G.
AU - Scheytt, J. Christoph
ID - 47126
JF - IEEE Microwave and Wireless Technology Letters
TI - A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics
ER -
TY - CONF
AB -
The study investigates two different ways of guiding the addressee of an explanation - an explainee, through action demonstration: contrastive and non-contrastive. Their effect was tested on attention to specific action elements (goal) as well as on event memory. In an eye-tracking experiment, participants were shown different motion videos that were either contrastive or non-contrastive with respect to the segments of movement presentation. Given that everyday action demonstration is often multimodal, the stimuli were created with re- spect to their visual and verbal presentation. For visual presentation, a video combined two movements in a contrastive (e.g., Up-motion following a Down-motion) or non-contrastive way (e.g., two Up-motions following each other). For verbal presentation, each video was combined with a sequence of instruction descriptions in the form of negative (i.e., contrastive) or assertive (i.e., non-contrastive) guidance. It was found that a) attention to the event goal increased for this condition in the later time window, and b) participants’ recall of the event was facilitated when a visually contrastive motion was combined with a verbal contrast.
AU - Singh, Amit
AU - Rohlfing, Katharina J.
ID - 46067
KW - Attention
KW - negation
KW - contrastive guidance
KW - eye-movements
KW - action understanding
KW - event representation
T2 - Proceedings of the Annual Meeting of the Cognitive Science Society 45 (45)
TI - Contrastiveness in the context of action demonstration: an eye-tracking study on its effects on action perception and action recall
ER -
TY - CONF
AB - This paper experimentally investigates and interprets the e®ects of noise and non-
linearity in a silicon photonic optical test structure. For the analysis di®erent optoelectronic phase
noise measurement techniques are used. Our tests focuses on the performance of integrated opti-
cal test structures using femtosecond pulses in the 1550nm spectral range. A primary objective
is to understand the behaviour of silicon photonic waveguides that can be further employed in the
implementation of an optoelectronic phase-locked loop (OEPLL) in silicon photonics technology.
A comparison of our results, as well as a discussion on the di®erent optoelectronic phase noise
measurement techniques are presented. Our ¯ndings provide insights that can be leveraged to
optimize the design and performance of ultra-low phase noise on-chip OEPLL systems locking
to mode-locked laser (MLL) signals. In the future such systems can be essential for advanced
communication and sensing applications.
AU - Surendranath Shroff, Vijayalakshmi
AU - Kress, Christian
AU - Bahmanian, Meysam
AU - Scheytt, J. Christoph
ID - 47521
T2 - 2023 PhotonIcs & Electromagnetics Research Symposium (PIERS),
TI - Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics
ER -
TY - JOUR
AU - Kürpick, Christian
AU - Rasor, Anja
AU - Scholtysik, Michel
AU - Kühn, Arno
AU - Koldewey, Christian
AU - Dumitrescu, Roman
ID - 47420
JF - Procedia CIRP
KW - General Medicine
SN - 2212-8271
TI - An Integrative View of the Transformations towards Sustainability and Digitalization: The Case for a Dual Transformation
VL - 119
ER -
TY - JOUR
AU - Zhai, Xiaokun
AU - Ma, Xuekai
AU - Gao, Ying
AU - Xing, Chunzi
AU - Gao, Meini
AU - Dai, Haitao
AU - Wang, Xiao
AU - Pan, Anlian
AU - Schumacher, Stefan
AU - Gao, Tingge
ID - 40274
IS - 13
JF - Physical Review Letters
TI - Electrically controlling vortices in a neutral exciton polariton condensate at room temperature
VL - 131
ER -
TY - GEN
AU - Sehlmeyer, Birte
AU - Kampmann, Rebecca
AU - Scheidemann, Claus
AU - Hemsel, Tobias
AU - Getzlaff, Mathias
ID - 47234
T2 - Frühjahrstagung 2023, Sektion Kondensierte Materie (SKM)
TI - Burst Mode of Ultrasonic Resonant Oscillations for Stimulation and Destruction of Tumor Cells
ER -
TY - GEN
AU - Kampmann, Rebecca
AU - Sehlmeyer, Birte
AU - Scheidemann, Claus
AU - Hemsel, Tobias
AU - Getzlaff, Mathias
ID - 47235
T2 - Frühjahrstagung 2023, Sektion Kondensierte Marterie (SKM)
TI - Burst Mode Characteristics of an Ultrasonic Transducer for Treatment of Cancer Cells
ER -
TY - GEN
AB - In planar microcavities, the transverse-electric and transverse-magnetic
(TE-TM) mode splitting of cavity photons arises due to their different
penetration into the Bragg mirrors and can result in optical spin-orbit
coupling (SOC). In this work, we find that in a liquid crystal (LC) microcavity
filled with perovskite microplates, the pronounced TE-TM splitting gives rise
to a strong SOC that leads to the spatial instability of microcavity polariton
condensates under single-shot excitation. Spatially varying hole burning and
mode competition occurs between polarization components leading to different
condensate profiles from shot to shot. The single-shot polariton condensates
become stable when the SOC vanishes as the TE and TM modes are spectrally well
separated from each other, which can be achieved by application of an electric
field to our LC microcavity with electrically tunable anisotropy. Our findings
are well reproduced and traced back to their physical origin by our detailed
numerical simulations. With the electrical manipulation our work reveals how
the shot-to-shot spatial instability of spatial polariton profiles can be
engineered in anisotropic microcavities at room temperature, which will benefit
the development of stable polariton-based optoeletronic and light-emitting
devices.
AU - Gao, Ying
AU - Ma, Xuekai
AU - Zhai, Xiaokun
AU - Xing, Chunzi
AU - Gao, Meini
AU - Dai, Haitao
AU - Wu, Hao
AU - Liu, Tong
AU - Ren, Yuan
AU - Wang, Xiao
AU - Pan, Anlian
AU - Hu, Wei
AU - Schumacher, Stefan
AU - Gao, Tingge
ID - 47532
T2 - arXiv:2305.01368
TI - Single-shot spatial instability and electric control of polariton
condensates at room temperature
ER -
TY - GEN
AB - The control and active manipulation of spin-orbit coupling (SOC) in photonic
systems is fundamental in the development of modern spin optics and topological
photonic devices. Here, we demonstrate the control of an artificial
Rashba-Dresselhaus (RD) SOC mediated by photochemical reactions in a
microcavity filled with an organic single-crystal of photochromic phase-change
character. Splitting of the circular polarization components of the optical
modes induced by photonic RD SOC is observed experimentally in momentum space.
By applying an ultraviolet light beam, we control the spatial molecular
orientation through a photochemical reaction and with that we control the
energies of the photonic modes. This way we realize a reversible conversion of
spin-splitting of the optical modes with different energies, leading to an
optically controlled switching between circularly and linearly polarized
emission from our device. Our strategy of in situ and reversible engineering of
SOC induced by a light field provides a promising approach to actively design
and manipulate synthetic gauge fields towards future on-chip integration in
photonics and topological photonic devices.
AU - Liang, Qian
AU - Ma, Xuekai
AU - Ren, Jiahuan
AU - Long, Teng
AU - Gu, Chunling
AU - An, Cunbin
AU - Fu, Hongbing
AU - Schumacher, Stefan
AU - Liao, Qing
ID - 47533
T2 - arXiv:2309.07652
TI - Photochemical reaction enabling the engineering of photonic spin-orbit
coupling in organic-crystal optical microcavities
ER -
TY - GEN
AB - Topological states have been widely investigated in different types of
systems and lattices. In the present work, we report on topological edge states
in double-wave (DW) chains, which can be described by a generalized
Aubry-Andr\'e-Harper (AAH) model. For the specific system of a
driven-dissipative exciton polariton system we show that in such potential
chains, different types of edge states can form. For resonant optical
excitation, we further find that the optical nonlinearity leads to a
multistability of different edge states. This includes topologically protected
edge states evolved directly from individual linear eigenstates as well as
additional edge states that originate from nonlinearity-induced localization of
bulk states. Extending the system into two dimensions (2D) by stacking
horizontal DW chains in the vertical direction, we also create 2D multi-wave
lattices. In such 2D lattices multiple Su-Schrieffer-Heeger (SSH) chains appear
along the vertical direction. The combination of DW chains in the horizontal
and SSH chains in the vertical direction then results in the formation of
higher-order topological insulator corner states.
AU - Schneider, Tobias
AU - Gao, Wenlong
AU - Zentgraf, Thomas
AU - Schumacher, Stefan
AU - Ma, Xuekai
ID - 47531
T2 - arXiv:2303.12593
TI - Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates
ER -
TY - GEN
AB - Exceptional points (EPs) with their intriguing spectral topology have
attracted considerable attention in a broad range of physical systems, with
potential sensing applications driving much of the present research in this
field. Here we theoretically demonstrate the realization of EPs in a system
with significant nonlinearity, a non-equilibrium exciton-polariton condensate.
With the possibility to control loss and gain and nonlinearity by optical
means, this system allows for a comprehensive analysis of the interplay of
nonlinearities (Kerr-type and saturable gain) and non-Hermiticity. Not only do
we find that EPs can be intentionally shifted in parameter space by the
saturable gain, we also observe intriguing rotations and intersections of
Riemann surfaces, and find nonlinearity-enhanced sensing capabilities. Our
results are quite general in nature and illustrate the potential of tailoring
spectral topology and related phenomena in non-Hermitian systems by
nonlinearity.
AU - Wingenbach, Jan
AU - Schumacher, Stefan
AU - Ma, Xuekai
ID - 47529
T2 - arXiv:2305.04855
TI - Tweaking Spectral Topology and Exceptional Points by Nonlinearity in
Non-Hermitian Polariton Systems
ER -
TY - JOUR
AB - AbstractEfforts to enhance sustainability in all areas of life are increasing worldwide. In the field of manufacturing technology, a wide variety of approaches are being used to improve both resource and energy efficiency. Efficiency as well as sustainability can be improved by creating a circular economy or through energy-efficient recycling processes. As part of the interdisciplinary research group "Light—Efficient—Mobile" investigations on the energy-efficient friction-induced recycling process have been carried out at the department of Forming and Machining Technology at Paderborn University. E.g. using the friction-induced recycling process, different formless solid aluminum materials can be direct recycled into semi-finished products in an energy-efficient manner. The results of investigations with regard to the influence of the geometrical shape and filling rate of the aluminum particles to be recycled as well as the rotational speed of the continuously rotating wheel are explained in this paper. In addition to the recycling of aluminum chips, aluminum particles like powders from the field of additive manufacturing are processed. Based on these results, the future potentials of solid-state recycling processes and their contribution to the circular economy are discussed. The main focus here is on future interdisciplinary research projects to achieve circularity in the manufacturing of user-individual semi-finished products as well as the possibility to selectively adjust the product properties with the continuous recycling process.
AU - Borgert, Thomas
AU - Milaege, Dennis
AU - Schweizer, Swetlana
AU - Homberg, Werner
AU - Schaper, Mirko
AU - Tröster, Thomas
ID - 47536
IS - 6
JF - International Journal of Material Forming
KW - General Materials Science
SN - 1960-6206
TI - Potentials of a friction-induced recycling process to improve resource and energy efficiency in manufacturing technology
VL - 16
ER -
TY - CHAP
AU - Fuchs, Christian
ED - Güney, Selma
ED - Hille, Lina
ED - Pfeiffer, Juliane
ED - Porak, Laura
ED - Theine, Hendrik
ID - 47548
T2 - Eigentum, Medien, Öffentlichkeit: Verhandlungen des Netzwerks Kritische Kommunikationswissenschaft
TI - Zur Kritik der Politischen Ökonomie des Digitalen Kapitalismus: Die Aktualität von Manfred Knoches Beitrag zur Kritik der Politischen Ökonomie der Medien und der Kommunikation
ER -
TY - JOUR
AB - We live in times of deep crisis. General crises of society often are accompanied by ideological struggles. Given this context, it is important that social theory reinvigorates the analysis of ideology. For doing so, it makes sense to engage with classical theories of ideology. This paper contributes to this task. It asks: How are the economic and the non-economic related? What is ideology? This article deals with the base/superstructure problem and the problem of ideology via an engagement with selected aspects of Stuart Hall’s, Georg Lukács’s and Raymond Williams’s works. The commonality of Hall’s, Lukács’s and Williams’s thoughts that makes a joint engagement with their works feasible is that they all three dealt with aspects of culture from a critical theory perspective and are in one way or another representatives of Cultural Marxism. While Lukács’s works and Cultural Studies are often presented as conflicting approaches, this paper shows that concerning the question of how the economic and the non-economic are related and how we can think of ideology, the approaches of Lukács, Williams, and Hall complement each other, which allows critical theories of culture to draw on all three approaches and to combine elements from them in a synergistic manner. There are parallels between Williams’, Hall’s, and Lukács’s solutions to the base/superstructure problem. Williams argues that the economic exerts pressures on and sets limits to the non-economic. Hall writes that the economic determines the non-economic in the first instance. Lukács argues that the economic circumscribes subjectivity and the non-economic.
AU - Fuchs, Christian
ID - 46448
JF - The Communication Review.
KW - base and superstructure
KW - culture
KW - economy and culture
KW - Georg Lukács
KW - ideology
KW - Raymond Williams
KW - Stuart Hall
TI - The Problems of Base/Superstructure and Ideology in the Works of Stuart Hall, Georg Lukács, and Raymond Williams
ER -
TY - CHAP
AU - Zentgraf, Thomas
ED - Panoiu, Nicoae C.
ID - 47543
SN - 978-0-323-90614-2
T2 - Fundamentals and Applications of Nonlinear Nanophotonics
TI - Symmetry governed nonlinear selection rules in nanophotonics
ER -
TY - JOUR
AU - Niemann, Valerie A.
AU - Huck, Marten
AU - Steinrück, Hans-Georg
AU - Toney, Michael F.
AU - Tarpeh, William A.
AU - Bone, Sharon E.
ID - 45826
JF - ACS ES&T Water
KW - Water Science and Technology
KW - Environmental Chemistry
KW - Chemistry (miscellaneous)
KW - Chemical Engineering (miscellaneous)
SN - 2690-0637
TI - X-ray Absorption Spectroscopy Reveals Mechanisms of Calcium and Silicon Fouling on Reverse Osmosis Membranes Used in Wastewater Reclamation
VL - 3
ER -
TY - BOOK
ED - Kalenborn, Axel
ED - Fazal-Baqaie, Masud
ED - Linssen, Oliver
ED - Volland, Alexander
ED - Yigitbas, Enes
ED - Engstler, Martin
ED - Bertram, Martin
ID - 47547
TI - Projektmanagement Und Vorgehensmodelle 2023 - Nachhaltige IT-Projekte
VL - Vol. P340
ER -
TY - JOUR
AU - Krämer, Felix
AU - Paradies, Jan
AU - Fernández, Israel
AU - Breher, Frank
ID - 47589
JF - Nature Chemistry
KW - General Chemical Engineering
KW - General Chemistry
SN - 1755-4330
TI - A crystalline aluminium–carbon-based ambiphile capable of activation and catalytic transfer of ammonia in non-aqueous media
ER -
TY - CONF
AU - Jonas-Ahrend, Gabriela
AU - Fraser-Abder, Pamela
AU - Kapanadze, Marika
AU - Joubran, Fadeel
AU - Mazzolini, Alexander
ID - 47590
TI - Lessons learned from a global review study of physics textbook evaluation and its implications for teaching and learning in the classroom
ER -
TY - CONF
AU - Jonas-Ahrend, Gabriela
AU - Kapanadze, Marika
AU - Mazzolini, Alexander
AU - Joubran, Fadeel
ID - 47591
TI - Physiklehrbücher im Fokus der fachdidaktischen Forschung - ein internationaler Literatur-Review
ER -
TY - GEN
AU - Jonas-Ahrend, Gabriela
AU - Kapanadze, Marika
AU - Mazzolini, Alexander
AU - Joubran, Fadeel
ID - 47602
TI - Ergebnisse einer Reviewstudie zur Evaluation von Physiklehrbüchern
ER -
TY - JOUR
AU - Knorr, Lukas
AU - Schlosser, Florian
AU - Meschede, Henning
ID - 45866
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 - Assessment of Energy Efficiency and Flexibility Measures in Electrified Process Heat Generation Based on Simulations in the Animal Feed Industry
VL - 11
ER -
TY - GEN
AB - In this proceeding we consider a translation invariant Nelson type model in
two spatial dimensions modeling a scalar relativistic particle in interaction
with a massive radiation field. As is well-known, the corresponding Hamiltonian
can be defined with the help of an energy renormalization. First, we review a
Feynman-Kac formula for the semigroup generated by this Hamiltonian proven by
the authors in a recent preprint (where several matter particles and exterior
potentials are treated as well). After that, we employ a few technical key
relations and estimates obtained in our preprint to present an otherwise
self-contained derivation of new Feynman-Kac formulas for the fiber
Hamiltonians attached to fixed total momenta of the translation invariant
system. We conclude by inferring an alternative derivation of the Feynman-Kac
formula for the full translation invariant Hamiltonian.
AU - Hinrichs, Benjamin
AU - Matte, Oliver
ID - 47534
T2 - arXiv:2309.09005
TI - Feynman-Kac formula for fiber Hamiltonians in the relativistic Nelson model in two spatial dimensions
ER -
TY - JOUR
AU - Pinsch, Jan Christian
ID - 47541
IS - 145
JF - tà katoptrizómena – Magazin für Kunst | Kultur | Theologie | Ästhetik
TI - Angst, Glaube und Liebe in M. Night Shyamalans „The Village“
ER -
TY - BOOK
AU - Pinsch, Jan Christian
AU - Arnhold, Oliver
AU - Lerke, Stephanie
ID - 47542
TI - Religiöse Feindbilder. Bausteine für die Sekundarstufe II
ER -
TY - JOUR
AB - We present a fully integrated radio frequency identifications transponder chip operating at 5.8 GHz, which is compatible with the class-1 generation-2 of the Electronic Product Code protocol (EPC-C1 G2). The tag chip including the analog front-end and the digital baseband processor, are designed in the sub-threshold regime (0.5 V) with a total supply current of less than 50 μA. As a power scavenging unit, a single-stage differential-drive rectifier structure is designed and fabricated with standard threshold voltage (SVT) MOS elements in a commercial 65-nm CMOS process, to provide 0.8 V of rectified voltage. Measurements performed on the fabricated single-stage structure show a maximum power conversion efficiency of 69.6% for a 22 kΩ load and a sensitivity of -12.5 dBm, which corresponds to more than 1 m of reading range. The power conversion efficiency at this range is about 64%.
AU - Haddadian, Sanaz
AU - Scheytt, J. Christoph
AU - von Bögel, Gerd
AU - Grenter, Thorben
ID - 47009
JF - IEEE Journal of Radio Frequency Identification
TI - A Sub-Threshold Microwave RFID Tag Chip, Compatible With RFID MIMO Reader Technology
ER -
TY - BOOK
AU - Althoff, Sebastian
ID - 47617
SN - 9783839466902
TI - Digitale Desökonomie: Unproduktivität, Trägheit und Exzess im digitalen Milieu
ER -
TY - BOOK
ED - Bartz, Christina
ED - Ruchatz, Jens
ED - Wattolik, Eva
ID - 47676
SN - 978-3-8376-6479-9
TI - Food - Media - Senses
ER -
TY - JOUR
AB - The introduction of Systems Engineering is an approach for dealing with the increasing complexity of products and their associated product development. Several introduction strategies are available in the literature; nevertheless, the introduction of Systems Engineering into practice still poses a great challenge to companies. Many companies have already gained experience in the introduction of Systems Engineering. Therefore, as part of the SE4OWL research project, the need to conduct a study including expert interviews and to collect the experiences of experts was identified. A total of 78 hypotheses were identified from 13 expert interviews concerning the lessons learned. Using exclusion criteria, 52 hypotheses were validated in a subsequent quantitative survey with 112 participants. Of these 52 hypotheses, 40 could be confirmed based on the survey results. Only four hypotheses were rejected, and eight could neither be confirmed nor rejected. Through this research, guidance is provided to companies to leverage best practices for the introduction of their own Systems Engineering and to avoid the poor practices of other companies.
AU - Wilke, Daria
AU - Grothe, Robin
AU - Bretz, Lukas
AU - Anacker, Harald
AU - Dumitrescu, Roman
ID - 47800
IS - 3
JF - Systems
KW - Information Systems and Management
KW - Computer Networks and Communications
KW - Modeling and Simulation
KW - Control and Systems Engineering
KW - Software
SN - 2079-8954
TI - Lessons Learned from the Introduction of Systems Engineering
VL - 11
ER -
TY - JOUR
AB - Abstract
In diesem Beitrag wird die soziotechnische Gestaltung einer Intelligenten Personaleinsatzplanung beim Unternehmen Miele & Cie. KG im Rahmen des Leuchtturmprojekts „InTime“ im Kompetenzzentrum Arbeitswelt.Plus beschrieben. Hierzu werden die Durchführung und Auswertung einer Interviewreihe sowie das daraus erarbeitete Soll-Konzept vorgestellt.
AU - Gabriel, Stefan
AU - Bentler, Dominik
AU - Bansmann, Michael
AU - Andrew Latos, Benedikt
AU - Kühn, Arno
AU - Dumitrescu, Roman
ID - 47798
IS - 1-2
JF - Zeitschrift für wirtschaftlichen Fabrikbetrieb
KW - Management Science and Operations Research
KW - Strategy and Management
KW - General Engineering
SN - 2511-0896
TI - Soziotechnische Gestaltung einer intelligenten Personaleinsatzplanung
VL - 118
ER -
TY - CHAP
AU - Menzefricke, Jörn Steffen
AU - Gabriel, Stefan
AU - Gundlach, Thomas
AU - Hobscheidt, Daniela
AU - Kürpick, Christian
AU - Schnasse, Felix
AU - Scholtysik, Michel
AU - Seif, Heiko
AU - Koldewey, Christian
AU - Dumitrescu, Roman
ID - 47797
SN - 2569-2348
T2 - Schwerpunkt Business Model Innovation
TI - Soziotechnisches Risikomanagement als Erfolgsfaktor für die Digitale Transformation
ER -
TY - CONF
AU - Bentler, Dominik
AU - Gabriel, Stefan
AU - Latos, Benedikt A.
AU - Dietrich, Oliver
AU - Dumitrescu, Roman
AU - Maier, Günter W.
ID - 47799
T2 - GfA-Frühjahrskongress 2023
TI - Partizipatives Gestaltungsvorgehen bei der Einführung künstlicher Intelligenz in produzierenden Unternehmen
ER -
TY - CONF
AU - Janzen, Thomas
ID - 47795
T2 - 30. DGFF Kongress 2023
TI - Show, don't tell - Rollenspielbasierte Simulationsprüfungen für zukünftige Englischlehrkräfte (Poster)
ER -
TY - JOUR
AU - Weller, Julian
AU - Roesmann, Daniel
AU - Eggert, Sönke
AU - von Enzberg, Sebastian
AU - Gräßler, Iris
AU - Dumitrescu, Roman
ID - 47827
JF - Procedia CIRP
KW - General Medicine
SN - 2212-8271
TI - Identification and prediction of standard times in machining for precision steel tubes through the usage of data analytics
VL - 119
ER -
TY - JOUR
AU - Machon, Fabian
AU - Gabriel, Stefan
AU - Latos, Benedikt
AU - Holtkötter, Christoph
AU - Lütkehoff, Ben
AU - Asmar, Laban
AU - Kühn, Arno
AU - Dumitrescu, Roman
ID - 47822
JF - Procedia CIRP
KW - General Medicine
SN - 2212-8271
TI - Design of individual simulation games in manufacturing companies for game-based learning
VL - 119
ER -
TY - JOUR
AU - Brock, Jonathan
AU - von Enzberg, Sebastian
AU - Kühn, Arno
AU - Dumitrescu, Roman
ID - 47824
JF - Procedia CIRP
KW - General Medicine
SN - 2212-8271
TI - Process Mining Data Canvas: A method to identify data and process knowledge for data collection and preparation in process mining projects
VL - 119
ER -
TY - JOUR
AU - Wilke, Daria
AU - Schierbaum, Anja
AU - Anacker, Harald
AU - Dumitrescu, Roman
ID - 47826
JF - Procedia CIRP
KW - General Medicine
SN - 2212-8271
TI - Targeted-oriented selection of engineering methods
VL - 119
ER -
TY - CHAP
AU - Hellweg, Talea
AU - Schneider, Martin
ED - Gräßler, Iris
ED - Maier, Günter W.
ED - Steffen, Eckhard
ED - Roesmann, Daniel
ID - 47675
SN - 9783031261039
T2 - The Digital Twin of Humans. An Interdisciplinary Concept of Digital Working Environments in Industry 4.0
TI - Which Types of Workers Are Adversely Affected by Digital Transformation? Insights from the Task-Based Approach
ER -
TY - CHAP
AU - Hemsen, Paul
AU - Reimann, Mareike
AU - Schneider, Martin
ED - Gräßler, Iris
ED - Maier, Günter W.
ED - Steffen, Eckhard
ED - Roesmann, Daniel
ID - 47677
SN - 9783031261039
T2 - The Digital Twin of Humans. An Interdisciplinary Concept of Digital Working Environments in Industry 4.0
TI - Digital Twins in Flexible Online Work: Crowdworkers on German-Language Platforms
ER -
TY - THES
AU - König, Jürgen
ID - 47833
TI - On the Membership and Correctness Problem for State Serializability and Value Opacity
ER -
TY - THES
AU - Hansmeier, Tim
ID - 47837
TI - XCS for Self-awareness in Autonomous Computing Systems
ER -
TY - CHAP
AU - Pilz, Sarah
AU - Hellweg, Talea
AU - Harteis, Christian
AU - Rückert, Ulrich
AU - Schneider, Martin
ED - Gräßler, Iris
ED - Maier, Günter W.
ED - Steffen, Eckhard
ED - Roesmann, Daniel
ID - 47671
SN - 9783031261039
T2 - The Digital Twin of Humans. An Interdisciplinary Concept of Digital Working Environments in Industry 4.0
TI - Who Will Own Our Global Digital Twin: The Power of Genetic and Biographic Information to Shape Our Lives
ER -
TY - CONF
AB - Estimating the ground state energy of a local Hamiltonian is a central
problem in quantum chemistry. In order to further investigate its complexity
and the potential of quantum algorithms for quantum chemistry, Gharibian and Le
Gall (STOC 2022) recently introduced the guided local Hamiltonian problem
(GLH), which is a variant of the local Hamiltonian problem where an
approximation of a ground state is given as an additional input. Gharibian and
Le Gall showed quantum advantage (more precisely, BQP-completeness) for GLH
with $6$-local Hamiltonians when the guiding vector has overlap
(inverse-polynomially) close to 1/2 with a ground state. In this paper, we
optimally improve both the locality and the overlap parameters: we show that
this quantum advantage (BQP-completeness) persists even with 2-local
Hamiltonians, and even when the guiding vector has overlap
(inverse-polynomially) close to 1 with a ground state. Moreover, we show that
the quantum advantage also holds for 2-local physically motivated Hamiltonians
on a 2D square lattice. This makes a further step towards establishing
practical quantum advantage in quantum chemistry.
AU - Gharibian, Sevag
AU - Hayakawa, Ryu
AU - Gall, François Le
AU - Morimae, Tomoyuki
ID - 32407
IS - 32
T2 - Proceedings of the 50th EATCS International Colloquium on Automata, Languages and Programming (ICALP)
TI - Improved Hardness Results for the Guided Local Hamiltonian Problem
VL - 261
ER -
TY - JOUR
AU - Mildorf, Jarmila
ID - 44214
IS - 4-5
JF - Zagadnienia Rodzajów Literackich
SN - 0084-4446
TI - Dialogical Functions of You-Narration in Auto/Biography: Anne Harich’s “Wenn ich das gewußt hätte…”: Erinnerungen an Wolfgang Harich (2007)
VL - 65
ER -
TY - CHAP
AU - Hatavara, Mari
AU - Hyvärinen, Matti
AU - Mildorf, Jarmila
ED - Ensslin, Astrid
ED - Round, Julia
ED - Thomas, Bronwen
ID - 47847
SN - 9780367635695
T2 - The Routledge Companion to Literary Media
TI - The Literary in Narrating Dramatic Life Experiences
ER -
TY - CHAP
AU - Mildorf, Jarmila
ED - Ensslin, Astrid
ED - Round, Julia
ED - Thomas, Bronwen
ID - 47848
SN - 9780367635695
T2 - The Routledge Companion to Literary Media
TI - Poeticity and Parody: The Literary Interview on Radio and Podcast
ER -
TY - JOUR
AU - Tenberge, Claudia
ID - 47868
JF - Grundschule Sachunterricht
TI - Ungeliebte Tiere in der Stadt
VL - 98
ER -
TY - JOUR
AB - Der Beitrag betrachtet die digitale häusliche Lernumwelt von Kindern unter besonderer Berücksichtigung der Differenzkategorien Herkunft und Sprache und erarbeitet Zusammenhänge zwischen dem Migrationshintergrund, der Familiensprache, einer internetbezogenen Eltern-Kind-Interaktion sowie einer unterhaltungs- und schulbezogenen Nutzung des Internets von Kindern. Empirische Grundlagen sind standardisierte Eltern- und Kinderbefragungen sowie ethnografisch orientierte Untersuchungen in Familien. Die quantitativen Analysen zeigen, dass Kinder, deren Hauptverkehrssprache in der Familie nicht Deutsch ist, häufiger gemeinsam mit ihren Eltern das Internet nutzten. Vertiefend liessen in der qualitativen Untersuchung diejenigen Kinder häufigere und komplexere Internetnutzungsformen für schulische Zwecke erkennen, die einen Migrationshintergrund aufweisen und hauptsächlich in ihrer Herkunftssprache (nicht Deutsch) innerhalb der Familie sprechen. Insbesondere in Familien, die selten in der Häuslichkeit Deutsch sprechen, hat sich die (gemeinsame) Internetrecherche als Mittel zur Kompensation von Sprachbarrieren erwiesen. Fehlende elterliche Unterstützungsmöglichkeiten aufgrund von sprachlichen Verständnisproblemen können insofern durch kindliche, elterliche oder gemeinsame Rechercheprozesse ausgeglichen werden.
AU - Richter, Lea
AU - Gruchel, Nicole
AU - Buhl, Heike M.
AU - Kamin, Anna-Maria
ID - 47887
JF - MedienPädagogik: Zeitschrift für Theorie und Praxis der Medienbildung
SN - 1424-3636
TI - Herkunftsbedingte und sprachliche Einflüsse bei der häuslichen Internetnutzung von Kindern
VL - 20
ER -
TY - BOOK
ED - ija Grigorjevaite, Kadri Mettis, Katarina Stekic, Kristof Van de Keere, Marjana Brkic, Michael Lenke, Mikko-Jussi Laakso, Paulius Lukas Tamošiūnas, Sofia Karlsson, Sven Hüsing, Jurga Turčinavičienė, Violeta Šlekienė, Mart Laanpere, and Vidita Urboniene
ID - 47885
TI - A PRACTICAL HANDBOOK ON EFFECTIVE DEVELOPMENT AND IMPLEMENTATION OF STEAM TEACHING AT SCHOOL
ER -
TY - CHAP
AU - Schröer, Franz
AU - Tenberge, Claudia
ED - Wooff, D. , McLain, M.
ID - 47886
T2 - Bloomsbury Handbook of Technology Education.
TI - Inclusion and the Development of Technology Education - Thinking towards an inclusive curriculum for technology education in German primary schools
ER -
TY - JOUR
AB - Ferroelectric domain boundaries are quasi-two-dimensional functional interfaces with high prospects for nanoelectronic applications. Despite their reduced dimensionality, they can exhibit complex non-Ising polarization configurations and unexpected physical properties. Here, the impact of the three-dimensional (3D) curvature on the polarization profile of nominally uncharged 180° domain walls in LiNbO3 is studied using second-harmonic generation microscopy and 3D polarimetry analysis. Correlations between the domain-wall curvature and the variation of its internal polarization unfold in the form of modulations of the Néel-like character, which we attribute to the flexoelectric effect. While the Néel-like character originates mainly from the tilting of the domain wall, the internal polarization adjusts its orientation due to the synergetic upshot of dipolar and monopolar bound charges and their variation with the 3D curvature. Our results show that curved interfaces in solid crystals may offer a rich playground for tailoring nanoscale polar states.
AU - Acevedo-Salas, Ulises
AU - Croes, Boris
AU - Zhang, Yide
AU - Cregut, Olivier
AU - Dorkenoo, Kokou Dodzi
AU - Kirbus, Benjamin
AU - Singh, Ekta
AU - Beccard, Henrik
AU - Rüsing, Michael
AU - Eng, Lukas M.
AU - Hertel, Riccardo
AU - Eliseev, Eugene A.
AU - Morozovska, Anna N.
AU - Cherifi-Hertel, Salia
ID - 47992
IS - 3
JF - Nano Letters
KW - Mechanical Engineering
KW - Condensed Matter Physics
KW - General Materials Science
KW - General Chemistry
KW - Bioengineering
SN - 1530-6984
TI - Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls
VL - 23
ER -
TY - JOUR
AB - Structural strain severely impacts material properties, such as the linear and nonlinear optical response. Moreover, strain plays a key role, e.g., in the physics of ferroelectrics and, in particular, of their domain walls. μ-Raman spectroscopy is a well-suited technique for the investigation of such strain effects as it allows to measure the lattice dynamics locally. However, quantifying and reconstructing strain fields from Raman maps requires knowledge on the strain dependence of phonon frequencies. In this paper, we have analyzed both theoretically and experimentally the phonon frequencies in the widely used ferroelectrics lithium niobate and lithium tantalate as a function of uniaxial strain via density functional theory and μ-Raman spectroscopy. Overall, we find a good agreement between our ab initio models and the experimental data performed with a stress cell. The majority of phonons show an increase in frequency under compressive strain, whereas the opposite is observed for tensile strains. Moreover, for E-type phonons, we observe the lifting of degeneracy already at moderate strain fields (i.e., at ±0.2%) along the x and y directions. This paper, hence, allows for the systematic analysis of three-dimensional strains in modern-type bulk and thin-film devices assembled from lithium niobate and tantalate.
AU - Singh, Ekta
AU - Pionteck, Mike N.
AU - Reitzig, Sven
AU - Lange, Michael
AU - Rüsing, Michael
AU - Eng, Lukas M.
AU - Sanna, Simone
ID - 47993
IS - 2
JF - Physical Review Materials
KW - Physics and Astronomy (miscellaneous)
KW - General Materials Science
SN - 2475-9953
TI - Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress
VL - 7
ER -
TY - JOUR
AB - Coherent nonlinear optical μ-spectroscopy is a frequently used tool in modern material science as it is sensitive to many different local observables, which comprise, among others, crystal symmetry and vibrational properties. The richness in information, however, may come with challenges in data interpretation, as one has to disentangle the many different effects like multiple reflections, phase jumps at interfaces, or the influence of the Guoy-phase. In order to facilitate interpretation, the work presented here proposes an easy-to-use semi-analytical modeling Ansatz, which bases upon known analytical solutions using Gaussian beams. Specifically, we apply this Ansatz to compute nonlinear optical responses of (thin film) optical materials. We try to conserve the meaning of intuitive parameters like the Gouy-phase and the nonlinear coherent interaction length. In particular, the concept of coherence length is extended, which is a must when using focal beams. The model is subsequently applied to exemplary cases of second- and third-harmonic generation. We observe a very good agreement with experimental data, and furthermore, despite the constraints and limits of the analytical Ansatz, our model performs similarly well as when using more rigorous simulations. However, it outperforms the latter in terms of computational power, requiring more than three orders less computational time and less performant computer systems.
AU - Spychala, Kai J.
AU - Amber, Zeeshan H.
AU - Eng, Lukas M.
AU - Rüsing, Michael
ID - 47994
IS - 12
JF - Journal of Applied Physics
KW - General Physics and Astronomy
SN - 0021-8979
TI - Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach
VL - 133
ER -
TY - JOUR
AU - Liu, Ping
AU - Schumann, Nils
AU - Abele, Fabian
AU - Ren, Fazheng
AU - Hanke, Marcel
AU - Xin, Yang
AU - Hartmann, Andreas
AU - Schlierf, Michael
AU - Keller, Adrian
AU - Lin, Weilin
AU - Zhang, Yixin
ID - 48013
JF - ACS Applied Nano Materials
KW - General Materials Science
SN - 2574-0970
TI - Thermophoretic Analysis of Biomolecules across the Nanoscales in Self-Assembled Polymeric Matrices
ER -
TY - CHAP
AU - Schuster, Britt-Marie
AU - Haaf, Susanne
ED - Haaf, Susanne
ED - Schuster, Britt-Marie
ID - 48025
T2 - Historische Textmuster im Wandel. Neue Wege zu Ihrer Erschließung
TI - Fünf Thesen zur Untersuchung des Textsortenwandels
VL - 331
ER -
TY - CHAP
AU - Schuster, Britt-Marie
AU - Thielert, Frauke
AU - Haaf, Susanne
ED - Haaf, Susanne
ED - Schuster, Britt-Marie
ID - 48029
T2 - Historische Textmuster im Wandel. Neue Wege zu ihrer Erschließung
TI - Fragen stellen in Pressetextsorten
ER -
TY - CHAP
AU - Schuster, Britt-Marie
ED - Markewitz, Friedrich
ED - Scholl, Stefan
ED - Schubert, Katrin
ED - Wilk, Nicole M.
ID - 46561
KW - Kommunikationsgeschichte
SN - 9783847116127
T2 - Kommunikative Praktiken im Nationalsozialismus
TI - »Das dankst du deinem Führer« – Adressierungspraktiken in der Widerstandskommunikation gegen den Nationalsozialismus
VL - 3
ER -
TY - CHAP
AU - Biehler, Rolf
AU - Frischemeier, Daniel
AU - Gould, Ronald
AU - Pfannkuch, Maxine
ED - Pepin, Birgit
ED - Gueudet, Ghislaine
ED - Choppin, Jeffrey
ID - 48042
T2 - Handbook of Digital Resources in Mathematics Education
TI - Impacts of Digitalization on Content and Goals of Statistics Education
ER -
TY - BOOK
ED - Schuster, Britt-Marie
ED - Markewitz, Friedrich
ED - Wilk, Nicole M.
ID - 48043
TI - Widerstandshandeln. Sprachliche Praktiken des Sich-Widersetzens zwischen 1933 und 1945
VL - 4
ER -
TY - JOUR
AB - ZusammenfassungDieser Beitrag widmet sich dem Zusammenhang von geistesgeschichtlicher Literaturgeschichtsschreibung und dem Konzept der ›deutschen Bewegung‹. Er rekonstruiert vor allem dessen germanistische Adaption und Weiterentwicklung durch Paul Kluckhohn sowie seinen polyvalenten Einsatz zum heft- und jahrgangsübergreifenden Erzählen einer fortgesetzten nationalen Geistesgeschichte in der Deutschen Vierteljahrsschrift.
AU - Gretz, Daniela
ID - 48047
IS - 3
JF - Deutsche Vierteljahrsschrift für Literaturwissenschaft und Geistesgeschichte
KW - Literature and Literary Theory
KW - Philosophy
KW - Cultural Studies
SN - 0012-0936
TI - »Viele alte Aufgaben wurden damit in einem neuen Lichte gesehen«
VL - 97
ER -
TY - JOUR
AU - Humpert, Lynn
AU - Wäschle, Moritz
AU - Horstmeyer, Sarah
AU - Anacker, Harald
AU - Dumitrescu, Roman
AU - Albers, Albert
ID - 48051
JF - Procedia CIRP
KW - General Medicine
SN - 2212-8271
TI - Stakeholder-oriented Elaboration of Artificial Intelligence use cases using the example of Special-Purpose engineering
VL - 119
ER -
TY - JOUR
AB - Brainwaves have demonstrated to be unique enough across individuals to be useful as biometrics. They also provide promising advantages over traditional means of authentication, such as resistance to external observability, revocability, and intrinsic liveness detection. However, most of the research so far has been conducted with expensive, bulky, medical-grade helmets, which offer limited applicability for everyday usage. With the aim to bring brainwave authentication and its benefits closer to real world deployment, we investigate brain biometrics with consumer devices. We conduct a comprehensive measurement experiment and user study that compare five authentication tasks on a user sample up to 10 times larger than those from previous studies, introducing three novel techniques based on cognitive semantic processing. Furthermore, we apply our analysis on high-quality open brainwave data obtained with a medical-grade headset, to assess the differences. We investigate both the performance, security, and usability of the different options and use this evidence to elicit design and research recommendations. Our results show that it is possible to achieve Equal Error Rates as low as 7.2% (a reduction between 68–72% with respect to existing approaches) based on brain responses to images with current inexpensive technology. We show that the common practice of testing authentication systems only with known attacker data is unrealistic and may lead to overly optimistic evaluations. With regard to adoption, users call for simpler devices, faster authentication, and better privacy.
AU - Arias-Cabarcos, Patricia
AU - Fallahi, Matin
AU - Habrich, Thilo
AU - Schulze, Karen
AU - Becker, Christian
AU - Strufe, Thorsten
ID - 48063
IS - 3
JF - ACM Transactions on Privacy and Security
KW - Safety
KW - Risk
KW - Reliability and Quality
KW - General Computer Science
SN - 2471-2566
TI - Performance and Usability Evaluation of Brainwave Authentication Techniques with Consumer Devices
VL - 26
ER -
TY - JOUR
AB - Data collection and aggregation by online services happens to an extent that is often beyond awareness and comprehension of its users. Transparency tools become crucial to inform people, though it is unclear how well they work. To investigate this matter, we conducted a user study focusing on Facebook, which has recently released the 'Off-Facebook Activity' transparency dashboard that informs about personal data collection from third parties. We exposed a group of n = 100 participants to the dashboard and surveyed their level of awareness and reactions to understand how transparency impacts users' privacy attitudes and intended behavior. Our participants were surprised about the massive amount of collected data, became significantly less comfortable with data collection, and more likely to take protective measures. Collaterally, we observed that current consent schemes are inadequate. Based on the survey findings, we make recommendations for more usable transparency and highlight the need to raise awareness about transparency tools and to provide easily actionable privacy controls.
AU - Arias-Cabarcos, Patricia
AU - Khalili, Saina
AU - Strufe, Thorsten
ID - 48061
IS - 1
JF - Proceedings on Privacy Enhancing Technologies
KW - General Medicine
SN - 2299-0984
TI - 'Surprised, Shocked, Worried'}: User Reactions to Facebook Data Collection from Third Parties
VL - 2023
ER -
TY - JOUR
AU - Winkel, Fabian
AU - Wallscheid, Oliver
AU - Scholz, Peter
AU - Böcker, Joachim
ID - 48059
JF - IEEE Open Journal of the Industrial Electronics Society
KW - Electrical and Electronic Engineering
KW - Industrial and Manufacturing Engineering
KW - Control and Systems Engineering
SN - 2644-1284
TI - Pseudo-Labeling Machine Learning Algorithm for Predictive Maintenance of Relays
ER -
TY - JOUR
AU - Winkel, Fabian
AU - Deuse-Kleinsteuber, Johannes
AU - Böcker, Joachim
ID - 48058
JF - IEEE Transactions on Reliability
KW - Electrical and Electronic Engineering
KW - Safety
KW - Risk
KW - Reliability and Quality
SN - 0018-9529
TI - Run-to-Failure Relay Dataset for Predictive Maintenance Research With Machine Learning
ER -
TY - CONF
AU - Röse, Markus
AU - Kablo, Emiram
AU - Arias Cabarcos, Patricia
ID - 48060
T2 - Proceedings of the 2023 European Symposium on Usable Security
TI - Overcoming Theory: Designing Brainwave Authentication for the Real World
ER -
TY - CONF
AU - Fallahi, Matin
AU - Strufe, Thorsten
AU - Arias-Cabarcos, Patricia
ID - 48062
T2 - 2023 IEEE International Conference on Pervasive Computing and Communications (PerCom)
TI - BrainNet: Improving Brainwave-based Biometric Recognition with Siamese Networks
ER -
TY - CONF
AB - Artificial benchmark functions are commonly used in optimization research because of their ability to rapidly evaluate potential solutions, making them a preferred substitute for real-world problems. However, these benchmark functions have faced criticism for their limited resemblance to real-world problems. In response, recent research has focused on automatically generating new benchmark functions for areas where established test suites are inadequate. These approaches have limitations, such as the difficulty of generating new benchmark functions that exhibit exploratory landscape analysis (ELA) features beyond those of existing benchmarks.The objective of this work is to develop a method for generating benchmark functions for single-objective continuous optimization with user-specified structural properties. Specifically, we aim to demonstrate a proof of concept for a method that uses an ELA feature vector to specify these properties in advance. To achieve this, we begin by generating a random sample of decision space variables and objective values. We then adjust the objective values using CMA-ES until the corresponding features of our new problem match the predefined ELA features within a specified threshold. By iteratively transforming the landscape in this way, we ensure that the resulting function exhibits the desired properties. To create the final function, we use the resulting point cloud as training data for a simple neural network that produces a function exhibiting the target ELA features. We demonstrate the effectiveness of this approach by replicating the existing functions of the well-known BBOB suite and creating new functions with ELA feature values that are not present in BBOB.
AU - Prager, Raphael Patrick
AU - Dietrich, Konstantin
AU - Schneider, Lennart
AU - Schäpermeier, Lennart
AU - Bischl, Bernd
AU - Kerschke, Pascal
AU - Trautmann, Heike
AU - Mersmann, Olaf
ID - 47522
KW - Benchmarking
KW - Instance Generator
KW - Black-Box Continuous Optimization
KW - Exploratory Landscape Analysis
KW - Neural Networks
SN - 9798400702020
T2 - Proceedings of the 17th ACM/SIGEVO Conference on Foundations of Genetic Algorithms
TI - Neural Networks as Black-Box Benchmark Functions Optimized for Exploratory Landscape Features
ER -
TY - CONF
AB - Exploratory landscape analysis (ELA) in single-objective black-box optimization relies on a comprehensive and large set of numerical features characterizing problem instances. Those foster problem understanding and serve as basis for constructing automated algorithm selection models choosing the best suited algorithm for a problem at hand based on the aforementioned features computed prior to optimization. This work specifically points to the sensitivity of a substantial proportion of these features to absolute objective values, i.e., we observe a lack of shift and scale invariance. We show that this unfortunately induces bias within automated algorithm selection models, an overfitting to specific benchmark problem sets used for training and thereby hinders generalization capabilities to unseen problems. We tackle these issues by presenting an appropriate objective normalization to be used prior to ELA feature computation and empirically illustrate the respective effectiveness focusing on the BBOB benchmark set.
AU - Prager, Raphael Patrick
AU - Trautmann, Heike
ED - Correia, João
ED - Smith, Stephen
ED - Qaddoura, Raneem
ID - 46297
SN - 978-3-031-30229-9
T2 - Applications of Evolutionary Computation
TI - Nullifying the Inherent Bias of Non-invariant Exploratory Landscape Analysis Features
ER -
TY - CONF
AB - The design and choice of benchmark suites are ongoing topics of discussion in the multi-objective optimization community. Some suites provide a good understanding of their Pareto sets and fronts, such as the well-known DTLZ and ZDT problems. However, they lack diversity in their landscape properties and do not provide a mechanism for creating multiple distinct problem instances. Other suites, like bi-objective BBOB, possess diverse and challenging landscape properties, but their optima are not well understood and can only be approximated empirically without any guarantees.
AU - Schäpermeier, Lennart
AU - Kerschke, Pascal
AU - Grimme, Christian
AU - Trautmann, Heike
ED - Emmerich, Michael
ED - Deutz, André
ED - Wang, Hao
ED - Kononova, Anna V.
ED - Naujoks, Boris
ED - Li, Ke
ED - Miettinen, Kaisa
ED - Yevseyeva, Iryna
ID - 46298
SN - 978-3-031-27250-9
T2 - Evolutionary Multi-Criterion Optimization
TI - Peak-A-Boo! Generating Multi-objective Multiple Peaks Benchmark Problems with Precise Pareto Sets
ER -
TY - JOUR
AB - The herein proposed Python package pflacco provides a set of numerical features to characterize single-objective continuous and constrained optimization problems. Thereby, pflacco addresses two major challenges in the area optimization. Firstly, it provides the means to develop an understanding of a given problem instance, which is crucial for designing, selecting, or configuring optimization algorithms in general. Secondly, these numerical features can be utilized in the research streams of automated algorithm selection and configuration. While the majority of these landscape features is already available in the R package flacco, our Python implementation offers these tools to an even wider audience and thereby promotes research interests and novel avenues in the area of optimization.
AU - Prager, Raphael Patrick
AU - Trautmann, Heike
ID - 46299
JF - Evolutionary Computation
SN - 1063-6560
TI - Pflacco: Feature-Based Landscape Analysis of Continuous and Constrained Optimization Problems in Python
ER -
TY - CONF
AU - Wilkerson, Michelle
AU - Ben-Zvi, Dani
AU - Dvir, Michal
AU - Matuk, Camilla
AU - Podworny, Susanne
AU - Stephens, Amy
AU - Zapata-Cardona, Lucia
ED - Slotta, J.D.
ED - Charles, E.S.
ID - 48100
T2 - General Proceedings of the ISLS Annual Meeting: Building Knowledge and Sustaining our Community
TI - K-12 Data Science Education: Outcomes of a National Workshop; International Perspectives; and Next Steps for the Learning Sciences
ER -
TY - CHAP
AU - Podworny, Susanne
ID - 48099
SN - 1869-4918
T2 - Advances in Mathematics Education
TI - Statistics and Probability Education in Germany
ER -
TY - CHAP
AB - Paying taxes is a field of economic activity that has always been highly morally charged: the question of who pays how much or can avoid or evade the prescribed payments is always closely related to debate about a fair societal distribution of burdens. In the process of moralisation, therefore, faith communities such as the Catholic Church also repeatedly seized the floor to propagate certain norms. The article examines the contributions of theologians from Spain, the USA and West Germany in the 1940s and 1950s. It concludes that the norms of taxation they propagated differed greatly depending on the institutional and economic frameworks within which they operated. The analysis proves taxation to be a field of economic action and societal dispute where economics and morality are indissolubly interconnected.
AU - Schönhärl, Korinna
ED - Skambraks, Tanja
ED - Lutz, Martin
ID - 48165
KW - Tax history
KW - religious history: financial history
KW - catholic church
KW - history of economic thought
SN - 9783031298349
T2 - Reassessing the Moral Economy Religion and Economic Ethics from Ancient Greece to the 20th Century
TI - Tax Morale and the Church: How Catholic Clergies Adapted Norms of Paying Taxes to Secular Institutions (1940s–1950s)
ER -
TY - JOUR
AB - AbstractA new approach for the characterization of CO2 methanation catalysts prepared by thermal decomposition of a nickel MOF by hard X‐ray photon‐in/photon‐out spectroscopy in form of high energy resolution fluorescence detected X‐ray absorption near edge structure spectroscopy (HERFD‐XANES) and valence‐to‐core X‐ray emission (VtC‐XES) is presented. In contrast to conventional X‐ray absorption spectroscopy, the increased resolution of both methods allows a more precise phase determination of the final catalyst, which is influenced by the conditions during MOF decomposition.
AU - Strübbe, Sven
AU - Nowakowski, Michał
AU - Schoch, Roland
AU - Bauer, Matthias
ID - 48167
JF - ChemPhysChem
KW - Physical and Theoretical Chemistry
KW - Atomic and Molecular Physics
KW - and Optics
SN - 1439-4235
TI - High‐Resolution X‐ray Absorption and Emission Spectroscopy for Detailed Analysis of New CO2 Methanation Catalysts
ER -
TY - BOOK
ED - Drerup, Johannes
ED - Göddertz, Nina
ED - Mattig, Ruprecht
ED - Thole , Werner
ED - Uhlendorff , Uwe
ID - 48164
TI - Bildungsforschung – Erziehungswissenschaftliche Perspektiven
ER -
TY - GEN
AU - Rüther, Moritz Johannes
AU - Klippstein, Sven Helge
AU - Schmid, Hans-Joachim
ID - 47626
SN - 0083-5560
T2 - PARTEC International Congress on Particle Technology - Book of Abstracts
TI - Correlation between SLS-Powder processability and particle properties
ER -
TY - CHAP
AU - Wallmeier, Nadine
AU - Wich-Reif, Claudia
ED - Hetjens, Dominik
ED - Lasch, Alexander
ED - Roth, Kerstin
ID - 48218
T2 - Historische (Morpho-)Syntax des Deutschen
TI - Vergleichskonstruktionen im Mittelniederdeutschen
VL - 14
ER -
TY - GEN
AU - Wallmeier, Nadine
ID - 48216
T2 - Linguistische Berichte
TI - Sarah Ihnen (2000): Relativsätze im Mittelniederdeutschen. Korpuslinguistische Untersuchungen zu Struktur und Gebrauch.
VL - 275
ER -
TY - JOUR
AU - Walmsley, Timothy Gordon
AU - Philipp, Matthias
AU - Picón-Núñez, Martín
AU - Meschede, Henning
AU - Taylor, Matthew Thomas
AU - Schlosser, Florian
AU - Atkins, Martin John
ID - 48243
JF - Renewable and Sustainable Energy Reviews
KW - Renewable Energy
KW - Sustainability and the Environment
SN - 1364-0321
TI - Hybrid renewable energy utility systems for industrial sites: A review
VL - 188
ER -
TY - JOUR
AU - Jacke, Christoph
ID - 48266
IS - 6
JF - Impulse. Texte und Bilder zur Kunstvermittlung.
TI - Abhängenwerden. Fühlen und Denken.
ER -
TY - CHAP
AU - Foerster, Anne
ED - Signori, Gabriela
ED - Zey, Claudia
ID - 40916
T2 - Regentinnen und andere Stellvertreterfiguren Vom 10. bis zum 15. Jahrhundert
TI - Regierende Herrscherwitwen und die Angst vor Fremdherrschaft. Zum Verhältnis von Dynastie und Geschlecht
VL - 111
ER -
TY - CHAP
AU - Foerster, Anne
ED - Bihrer, Andreas
ED - Szill, Rike
ID - 40918
T2 - Eroberte im Mittelalter: Umbruchssituationen erleben, bewältigen, gestalten
TI - Die Stimmen der Eroberten bei Ermoldus Nigellus. Eine Mahnung an Ludwig den Frommen und Pippin von Aquitanien
ER -
TY - JOUR
ID - 48287
TI - To share or not to share: What risks would laypeople accept to give sensitive data to differentially-private NLP systems?
ER -
TY - CHAP
AU - Leiss, Dominik
AU - Gerlach, Kerstin
AU - Wessel, Lena
AU - Schmidt-Thieme, Barbara
ID - 48319
SN - 9783662666036
T2 - Handbuch der Mathematikdidaktik
TI - Sprache und Mathematiklernen
ER -
TY - CONF
AU - Habernal, Ivan
AU - Mireshghallah, Fatemehsadat
AU - Thaine, Patricia
AU - Ghanavati, Sepideh
AU - Feyisetan, Oluwaseyi
ID - 48289
T2 - Proceedings of the 17th Conference of the European Chapter of the Association for Computational Linguistics: Tutorial Abstracts
TI - Privacy-Preserving Natural Language Processing
ER -
TY - CONF
AU - Matzken, Cleo
AU - Eger, Steffen
AU - Habernal, Ivan
ID - 48288
T2 - Findings of the Association for Computational Linguistics: ACL 2023
TI - Trade-Offs Between Fairness and Privacy in Language Modeling
ER -
TY - CONF
AU - Mouhammad, Nina
AU - Daxenberger, Johannes
AU - Schiller, Benjamin
AU - Habernal, Ivan
ID - 48291
T2 - Proceedings of the 17th Linguistic Annotation Workshop (LAW-XVII)
TI - Crowdsourcing on Sensitive Data with Privacy-Preserving Text Rewriting
ER -
TY - CONF
AU - Yin, Ying
AU - Habernal, Ivan
ID - 48296
T2 - Proceedings of the Natural Legal Language Processing Workshop 2022
TI - Privacy-Preserving Models for Legal Natural Language Processing
ER -
TY - CHAP
AU - Wille, Manuel
ED - Just, Anna
ED - Wich-Reif, Claudia
ID - 48344
T2 - Text und Bild: Relationen und Funktionen in Texten vom 8. bis 18. Jahrhundert : Akten zum internationalen Kongress 17. bis 19. Juni 2021
TI - Text-Bild-Bezüge in illustrierten Flugblättern von 1500 bis 1700
VL - 37
ER -
TY - CONF
AB - Star-connected cascaded H-bridge Converters require large DC-link capacitors to buffer the second-order harmonic voltage ripple. First, it is analytically proven that the DC-link voltage ripple is proportional to the apparent converter power and does not depend on the power factor for nominal operation with sinusoidal reference arm voltages and currents. A third-harmonic zero-sequence voltage injection with an optimal amplitude and phase angle transforms the 2nd harmonic to a 4th harmonic DC-link voltage ripple. This reduces the voltage ripple by exactly 50% for all power factors at steady-state at balanced conditions. However, this requires 54% additional modules for unity power factor operation and even 100% for pure reactive power operation to account for the increased reference arm voltages due to the large amplitude of the optimal third-harmonic injection. If not enough modules are available, an adaptive discontinuous PWM is utilized to still minimize the voltage ripple for the given number of modules and power factor. With a very limited number of modules (modulation index is 1.15), the proposed method still reduces the DC-link voltage ripple by 24.4% for unity power factor operation. It requires the same number of modules as the commonly utilized 3rd harmonic injection with 1/6 of the grid voltage amplitude and achieves superior results. Simulations of a 10 kV/1 MVA system confirm the analysis.
AU - Unruh, Roland
AU - Böcker, Joachim
AU - Schafmeister, Frank
ID - 48352
KW - Cascaded H-Bridge
KW - Solid-State Transformer
KW - Capacitor voltage ripple
KW - Zero sequence voltage
KW - Third harmonic injection
SN - 979-8-3503-1678-0
T2 - 2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe)
TI - An Optimized Third-Harmonic Injection Reduces DC-Link Voltage Ripple in Cascaded H-Bridge Converters up to 50% for all Power Factors
ER -