TY - CHAP
AU - Reinsberger, Claus
ED - Krutsch, Werner
ED - Mayr, Hermann O
ED - Musahl, Volker
ED - Della Villa, Francesco
ED - Tscholl, Philippe M
ED - Jones, Henrique
ID - 38111
T2 - Injury and health risk management in sports - a guide to decision making
TI - Neurology
ER -
TY - CONF
AU - Krause, Daniel
AU - Richert, Benjamin
AU - Weigelt, Matthias
ID - 38115
TI - Neuronale Korrelate der mentalen Rotation von menschlichen Figuren und alphanumerischen Stimuli
ER -
TY - JOUR
AB - AbstractThis study presents a new and innovative sieve tray design for a more flexible operation of separation columns in terms of possible throughput. The advantage of this new tray design is to ensure an optimal operation for varying feed flow rates and constant separation efficiencies for different load ranges. The aim of this work is to give a short introduction and an outlook to the investigation of the functionality of the designed trays. Moreover, the general design of the new trays, first results for CFD simulations of the dry pressure drop and the experimental setup are presented.
AU - Fasel, Henrik
AU - Grünewald, Marcus
AU - Riese, Julia
ID - 47577
IS - 12
JF - Chemie Ingenieur Technik
KW - Industrial and Manufacturing Engineering
KW - General Chemical Engineering
KW - General Chemistry
SN - 0009-286X
TI - New Column Design to Enhance Flexibility: Concept for Hydrodynamic Characterization
VL - 92
ER -
TY - JOUR
AB - Al-Li based alloys are attractive materials for the aerospace industry. The twin-roll casting of such materials could provide properties not achievable by conventional direct-chill casting and downstream processing methods due to significantly higher solidification rates. An Al-Li-Cu-Mg-Zr alloy was twin-roll cast with the same alloy containing a small addition of Sc. The microstructure of as-cast materials and the influence of Sc on the behavior of the alloy at elevated temperatures were studied by means of light and electron microscopy and by resistivity measurements. A fine-grained structure was formed during twin-roll casting, but several surface and internal defects were found on the strips, which should be suppressed by a further adjustment of the casting conditions. The addition of Sc had a positive effect on grain size uniformity and microstructure stabilization at elevated temperatures, as shown by the precipitation of a fine dispersion of coherent Sc- and Zr-containing precipitates.
AU - Grydin, Olexandr
AU - Stolbchenko, Mykhailo
AU - Schaper, Mirko
AU - Belejová, Sára
AU - Králík, Rostislav
AU - Bajtošová, Lucia
AU - Křivská, Barbora
AU - Hájek, Michal
AU - Cieslar, Miroslav
ID - 24573
IS - 8
JF - Metals
SN - 2075-4701
TI - New Twin-Roll Cast Al-Li Based Alloys for High-Strength Applications
VL - 10
ER -
TY - JOUR
AB - Digital data on tangible and intangible cultural assets is an essential part of daily life, communication and experience. It has a lasting influence on the perception of cultural identity as well as on the interactions between research, the cultural economy and society. Throughout the last three decades, many cultural heritage institutions have contributed a wealth of digital representations of cultural assets (2D digital reproductions of paintings, sheet music, 3D digital models of sculptures, monuments, rooms, buildings), audio-visual data (music, film, stage performances), and procedural research data such as encoding and annotation formats. The long-term preservation and FAIR availability of research data from the cultural heritage domain is fundamentally important, not only for future academic success in the humanities but also for the cultural identity of individuals and society as a whole. Up to now, no coordinated effort for professional research data management on a national level exists in Germany. NFDI4Culture aims to fill this gap and create a user-centered, research-driven infrastructure that will cover a broad range of research domains from musicology, art history and architecture to performance, theatre, film, and media studies.
The research landscape addressed by the consortium is characterized by strong institutional differentiation. Research units in the consortium's community of interest comprise university institutes, art colleges, academies, galleries, libraries, archives and museums. This diverse landscape is also characterized by an abundance of research objects, methodologies and a great potential for data-driven research. In a unique effort carried out by the applicant and co-applicants of this proposal and ten academic societies, this community is interconnected for the first time through a federated approach that is ideally suited to the needs of the participating researchers. To promote collaboration within the NFDI, to share knowledge and technology and to provide extensive support for its users have been the guiding principles of the consortium from the beginning and will be at the heart of all workflows and decision-making processes. Thanks to these principles, NFDI4Culture has gathered strong support ranging from individual researchers to high-level cultural heritage organizations such as the UNESCO, the International Council of Museums, the Open Knowledge Foundation and Wikimedia. On this basis, NFDI4Culture will take innovative measures that promote a cultural change towards a more reflective and sustainable handling of research data and at the same time boost qualification and professionalization in data-driven research in the domain of cultural heritage. This will create a long-lasting impact on science, cultural economy and society as a whole.
AU - Altenhöner, Reinhard
AU - Blümel, Ina
AU - Boehm, Franziska
AU - Bove, Jens
AU - Bicher, Katrin
AU - Bracht, Christian
AU - Brand, Ortrun
AU - Dieckmann, Lisa
AU - Effinger, Maria
AU - Hagener, Malte
AU - Hammes, Andrea
AU - Heller, Lambert
AU - Kailus, Angela
AU - Kohle, Hubertus
AU - Ludwig, Jens
AU - Münzmay, Andreas
AU - Pittroff, Sarah
AU - Razum, Matthias
AU - Röwenstrunk, Daniel
AU - Sack, Harald
AU - Simon, Holger
AU - Schmidt, Dörte
AU - Schrade, Torsten
AU - Walzel, Annika-Valeska
AU - Wiermann, Barbara
ID - 21257
JF - Research Ideas and Outcomes
SN - 2367-7163
TI - NFDI4Culture - Consortium for research data on material and immaterial cultural heritage
ER -
TY - JOUR
AB - Digital data on tangible and intangible cultural assets is an essential part of daily life, communication and experience. It has a lasting influence on the perception of cultural identity as well as on the interactions between research, the cultural economy and society. Throughout the last three decades, many cultural heritage institutions have contributed a wealth of digital representations of cultural assets (2D digital reproductions of paintings, sheet music, 3D digital models of sculptures, monuments, rooms, buildings), audio-visual data (music, film, stage performances), and procedural research data such as encoding and annotation formats. The long-term preservation and FAIR availability of research data from the cultural heritage domain is fundamentally important, not only for future academic success in the humanities but also for the cultural identity of individuals and society as a whole. Up to now, no coordinated effort for professional research data management on a national level exists in Germany. NFDI4Culture aims to fill this gap and create a user-centered, research-driven infrastructure that will cover a broad range of research domains from musicology, art history and architecture to performance, theatre, film, and media studies.
The research landscape addressed by the consortium is characterized by strong institutional differentiation. Research units in the consortium's community of interest comprise university institutes, art colleges, academies, galleries, libraries, archives and museums. This diverse landscape is also characterized by an abundance of research objects, methodologies and a great potential for data-driven research. In a unique effort carried out by the applicant and co-applicants of this proposal and ten academic societies, this community is interconnected for the first time through a federated approach that is ideally suited to the needs of the participating researchers. To promote collaboration within the NFDI, to share knowledge and technology and to provide extensive support for its users have been the guiding principles of the consortium from the beginning and will be at the heart of all workflows and decision-making processes. Thanks to these principles, NFDI4Culture has gathered strong support ranging from individual researchers to high-level cultural heritage organizations such as the UNESCO, the International Council of Museums, the Open Knowledge Foundation and Wikimedia. On this basis, NFDI4Culture will take innovative measures that promote a cultural change towards a more reflective and sustainable handling of research data and at the same time boost qualification and professionalization in data-driven research in the domain of cultural heritage. This will create a long-lasting impact on science, cultural economy and society as a whole.
AU - Altenhöner, Reinhard
AU - Blümel, Ina
AU - Boehm, Franziska
AU - Bove, Jens
AU - Bicher, Katrin
AU - Bracht, Christian
AU - Brand, Ortrun
AU - Dieckmann, Lisa
AU - Effinger, Maria
AU - Hagener, Malte
AU - Hammes, Andrea
AU - Heller, Lambert
AU - Kailus, Angela
AU - Kohle, Hubertus
AU - Ludwig, Jens
AU - Münzmay, Andreas
AU - Pittroff, Sarah
AU - Razum, Matthias
AU - Röwenstrunk, Daniel
AU - Sack, Harald
AU - Simon, Holger
AU - Schmidt, Dörte
AU - Schrade, Torsten
AU - Walzel, Annika-Valeska
AU - Wiermann, Barbara
ID - 47476
JF - Research Ideas and Outcomes
KW - Research Data Management
SN - 2367-7163
TI - NFDI4Culture - Consortium for research data on material and immaterial cultural heritage
VL - 6
ER -
TY - CHAP
AU - Diedrich, Alena
ED - Eke, Norbert Otto
ID - 49833
T2 - Handbuch Vormärz
TI - Nikolaus Lenau
ER -
TY - GEN
AU - Weigelt, Matthias
AU - Güldenpenning, Iris
AU - Steggemann-Weinrich, Y.
ED - Amesberger, G.
ED - Würth, S.
ED - Finkenzeller, T.
ID - 47019
T2 - Zukunft der Sportpsychologie zwischen Verstehen und Evidenz. Abstractband der 52. Jahrestagung der Arbeitsgemeinschaft für Sportpsychologie (asp)
TI - No effect of social cues in antisocial behavior: The head-fake effect in basketball is not based on the processing of eye gaze direction
ER -
TY - JOUR
AU - Anerot, Baptiste
AU - Cresson, Jacky
AU - Hariz Belgacem, Khaled
AU - Pierret, Frederic
ID - 39414
IS - 11
JF - Journal of Mathematical Physics
KW - Mathematical Physics
KW - Statistical and Nonlinear Physics
SN - 0022-2488
TI - Noether’s-type theorems on time scales
VL - 61
ER -
TY - JOUR
AU - Anerot, Baptiste
AU - Cresson, Jacky
AU - Hariz Belgacem, Khaled
AU - Pierret, Frederic
ID - 39399
IS - 11
JF - Journal of Mathematical Physics
KW - Mathematical Physics
KW - Statistical and Nonlinear Physics
SN - 0022-2488
TI - Noether’s-type theorems on time scales
VL - 61
ER -
TY - JOUR
AU - Zhao, Bin
AU - Manthe, Uwe
ID - 19501
JF - The Journal of Chemical Physics
KW - pc2-ressources
SN - 0021-9606
TI - Non-adiabatic transitions in the reaction of fluorine with methane
ER -
TY - JOUR
AB - The challenge of designing new tunable nonlinear dielectric materials with tailored properties has attracted an increasing amount of interest recently. Herein, we study the effective nonlinear dielectric response of a stochastic paraelectric-dielectric composite consisting of equilibrium distributions of circular and partially penetrable disks (or parallel, infinitely long, identical, partially penetrable, circular cylinders) of a dielectric phase randomly dispersed in a continuous matrix of a paraelectric phase. The random microstructures were generated using the Metropolis Monte Carlo algorithm. The evaluation of the effective permittivity and tunability were carried out by employing either a Landau thermodynamic model or its Johnson’s approximation to describe the field-dependent permittivity of the paraelectric phase and solving continuum-electrostatics equations using finite element calculations. We reveal that the percolation threshold in this composite governs the critical behavior of the effective permittivity and tunability. For microstructures below the percolation threshold, our simulations demonstrate a strong nonlinear behaviour of the field-dependent effective permittivity and very high tunability that increases as a function of dielectric phase concentration. Above the percolation threshold, the effective permittivity shows the tendency to linearization and the tunability dramatically drops down. The highly reduced permittivity and extraordinarily high tunability are obtained for the composites with dielectric impenetrable disks at high concentrations, in which the triggering of the percolation transition is avoided. The reported results cast light on distinct nonlinear behaviour of 2D and 3D stochastic composites and can guide the design of novel composites with the controlled morphology and tailored permittivity and tunability.
AU - Myroshnychenko, Viktor
AU - Smirnov, Stanislav
AU - Jose, Pious Mathews Mulavarickal
AU - Brosseau, Christian
AU - Förstner, Jens
ID - 20233
JF - Acta Materialia
SN - 1359-6454
TI - Nonlinear dielectric properties of random paraelectric-dielectric composites
VL - 203
ER -
TY - JOUR
AU - Spychala, K. J.
AU - Mackwitz, P.
AU - Rüsing, Michael
AU - Widhalm, A.
AU - Berth, Gerhard
AU - Silberhorn, Christine
AU - Zrenner, Artur
ID - 22056
JF - Journal of Applied Physics
SN - 0021-8979
TI - Nonlinear focal mapping of ferroelectric domain walls in LiNbO3: Analysis of the SHG microscopy contrast mechanism
ER -
TY - JOUR
AU - Schlickriede, Christian
AU - Kruk, Sergey S.
AU - Wang, Lei
AU - Sain, Basudeb
AU - Kivshar, Yuri
AU - Zentgraf, Thomas
ID - 16944
IS - 6
JF - Nano Letters
SN - 1530-6984
TI - Nonlinear imaging with all-dielectric metasurfaces
VL - 20
ER -
TY - JOUR
AB - Nonlinear Pancharatnam–Berry phase metasurfaces facilitate the nontrivial phase modulation for frequency conversion processes by leveraging photon‐spin dependent nonlinear geometric‐phases. However, plasmonic metasurfaces show some severe limitation for nonlinear frequency conversion due to the intrinsic high ohmic loss and low damage threshold of plasmonic nanostructures. Here, the nonlinear geometric‐phases associated with the third‐harmonic generation process occurring in all‐dielectric metasurfaces is studied systematically, which are composed of silicon nanofins with different in‐plane rotational symmetries. It is found that the wave coupling among different field components of the resonant fundamental field gives rise to the appearance of different nonlinear geometric‐phases of the generated third‐harmonic signals. The experimental observations of the nonlinear beam steering and nonlinear holography realized in this work by all‐dielectric geometric‐phase metasurfaces are well explained with the developed theory. This work offers a new physical picture to understand the nonlinear optical process occurring at nanoscale dielectric resonators and will help in the design of nonlinear metasurfaces with tailored phase properties.
AU - Liu, Bingyi
AU - Sain, Basudeb
AU - Reineke, Bernhard
AU - Zhao, Ruizhe
AU - Meier, Cedrik
AU - Huang, Lingling
AU - Jiang, Yongyuan
AU - Zentgraf, Thomas
ID - 16197
IS - 9
JF - Advanced Optical Materials
SN - 2195-1071
TI - Nonlinear Wavefront Control by Geometric-Phase Dielectric Metasurfaces: Influence of Mode Field and Rotational Symmetry
VL - 8
ER -
TY - GEN
AU - Rosenhäger, Tjard Henrik
ID - 16571
TI - Nothing comes for free - Ein klassifizierender Überblick zu den Auswirkungen finanzieller Anreize auf digitalen Märkten
ER -
TY - JOUR
AU - Berg, Patrik
AU - Obst, Franziska
AU - Simon, David
AU - Richter, Andreas
AU - Appelhans, Dietmar
AU - Kuckling, Dirk
ID - 23849
JF - European Journal of Organic Chemistry
SN - 1434-193X
TI - Novel Application of Polymer Networks Carrying Tertiary Amines as a Catalyst Inside Microflow Reactors Used for Knoevenagel Reactions
ER -
TY - GEN
AU - Seutter, Janina
AU - Neumann, Jürgen
AU - Kundisch, Dennis
ID - 15210
T2 - Tagungsband der 15. Internationalen Tagung Wirtschaftsinformatik 2020 (WI)
TI - Nudging in Judging- Differences in Online Rating Behavior for Utilitarian and Hedonic Service Aspects
ER -
TY - JOUR
AU - Bielak, Christian Roman
AU - Böhnke, Max
AU - Beck, Robert
AU - Bobbert, Mathias
AU - Meschut, Gerson
ID - 20678
JF - Journal of Advanced Joining Processes.
KW - Clinching
KW - process simulation
KW - FEM
KW - pre-straining
KW - sensitivity analysis
TI - Numerical analysis of the robustness of clinching process considering the pre-forming of the parts
ER -
TY - JOUR
AU - Hernández Castellanos, C. I. O.
AU - Schütze, G.
AU - Sun, J.-Q.
AU - Ober-Blöbaum, Sina
AU - Morales-Luna, G.
ID - 29398
JF - Mathematics
TI - Numerical computation of lightly multi-objective robust optimal solutions by means of generalized cell mapping
VL - 8(11):1959
ER -
TY - JOUR
AU - Zibart, A.
AU - Kenig, E.Y.
ID - 23788
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
TI - Numerical investigation of conjugate heat transfer in a pillow-plate heat exchanger
ER -
TY - JOUR
AU - Olenberg, Alexander
AU - Kenig, Eugeny
ID - 23784
JF - Chemical Engineering Science
SN - 0009-2509
TI - Numerical investigation of liquid flow morphology in structured packings
VL - 219
ER -
TY - CONF
AU - Tinkloh, Steffen Rainer
AU - Wu, Tao
AU - Tröster, Thomas
AU - Niendorf, Thomas
ID - 16930
T2 - Proceedings of the 4th International Conference Hybrid 2020 Materials and Structures
TI - Numerical investigation of the hole-drilling method applied to intrinsic manufactured metal-CFRP hybrids
ER -
TY - GEN
AU - Wende, Marc
AU - Kenig, Eugeny
ID - 16248
T2 - Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik, Adsorption und Extraktion
TI - Numerische Simulation von Gravidestillationsapparaten mit Metallschäumen
ER -
TY - CONF
AU - Wende, Marc
AU - Philippi, Kai
AU - Kenig, Eugeny
ID - 19738
T2 - 10. ProcessNet-Jahrestagung und 34. DECHEMA-Jahrestagung der Biotechnologen
TI - Numerische Simulation von Gravidestillationsapparaten zur Trennung eines binären Ethanol/Wasser-Gemisches
ER -
TY - JOUR
AU - Wende, Marc
AU - Philippi, K.
AU - Kenig, Eugeny
ID - 22464
IS - 9
JF - Chemie Ingenieur Technik
SN - 0009-286X
TI - Numerische Simulation von Gravidestillationsapparaten zur Trennung eines binären Ethanol/Wasser‐Gemisches
VL - 92
ER -
TY - GEN
AU - Wecker, Christian
AU - Hoppe, Anna
AU - Schulz, Andreas
AU - Heine, Jens
AU - Bart, Hans-Jörg
AU - Kenig, Eugeny
ID - 16307
TI - Numerische Untersuchungen des Stofftransports in Flüssig-Flüssig-Systemen unter Berücksichtigung der Marangonikonvektion
ER -
TY - THES
AB - Mit seiner Eignung für den Einsatz in Luftfahrzeugen stellt vor allem der Werkstoff Ultem 9085 in Verbindung mit der Verarbeitbarkeit im Fused Deposition Modeling (FDM) Prozesses ein großes Potential für die Kleinserienfertigung mittels additiver Fertigungstechnologien im Luftfahrtbereich dar. Hier bestehen aufgrund der Schichtbauweise Herausforderungen zur Optimierung der Oberflächenqualität. Des Weiteren ist das Ermüdungsverhalten von FDM-Strukturen noch unzureichend erforscht.
Mit dem Schwerpunkt auf dem Werkstoff Ultem 9085 sind im Rahmen dieser Dissertation zunächst Nachbehandlungsmethoden zur Verbesserung der Oberflächenqualität analysiert worden. Hier konnten Oberflächenrauheiten durch den Einsatz eines chemischen Nachbehandlungsprozesses um bis zu 80 % reduziert werden. Die dabei als Nebeneffekt erzeugte Schließung der porösen Oberflächenstruktur begünstigte zudem einen anschließenden Metallisierungsprozess zur Veredelung der Oberflächenstruktur. Die Ermüdungseigenschaften fallen für FDM-Strukturen aufgrund der inneren und äußeren Kerben im Vergleich zu spritzgegossenen Substraten vergleichsweise gering aus. Durch Überfüllung der Bau-teile und gezielte Strangorientierungen kann die Lebensdauer insbesondere für seitlich und flach aufgebaute Zugprüfkörper erhöht werden. Der chemische Nachbehandlungsprozess wirkt sich durch die Reduzierung von äußeren Kerben vor allem positiv auf die mechanischen Eigenschaften von aufrecht hergestellten Strukturen aus.
AU - Fischer, Matthias
ID - 24773
SN - 978-3-8440-7281-5
TI - Oberflächennachbehandlung beim Fused Deposition Modeling – Analyse der Oberflächenstruktur und mechanischer Kennwerte
VL - 17
ER -
TY - CHAP
AU - Berger, Thomas
AU - Lanza, Lukas Johannes
ID - 21579
SN - 2199-7497
T2 - Progress in Differential-Algebraic Equations II
TI - Observers for Differential-Algebraic Systems with Lipschitz or Monotone Nonlinearities
ER -
TY - CHAP
AU - Berger, Thomas
AU - Lanza, Lukas Johannes
ED - Grundel, S.
ED - Reis, T.
ED - Schöps, S.
ID - 36351
T2 - Progress in Differential-Algebraic Equations II
TI - Observers for differential-algebraic systems with Lipschitz or monotone nonlinearities
ER -
TY - JOUR
AU - Ahrens, Stephan
ID - 44393
JF - Dschungel (jungle World)
TI - Offensive Sensation. Ein Porträt von Melina Mercouri
ER -
TY - BOOK
AU - Aßmuth, Verena
AU - Teutenberg, Dominik
AU - Meschut, Gerson
AU - Stepanov, Sergey
AU - Ihde, Jörg
AU - Mayer, Bernd
ID - 20674
TI - Offenzeit plasmaaktivierter Polymeroberflächen für robuste klebtechnische Prozesse
ER -
TY - CONF
AU - Aßmuth, Verena
AU - Teutenberg, Dominik
AU - Meschut, Gerson
AU - Stepanov, Sergey
AU - Stalling, Annika
AU - Ihde, Jörg
AU - Mayer, Bernd
ID - 20647
T2 - 20. Kolloquium Gemeinsame Forschung in der Klebtechnik
TI - Offenzeit plasmaaktivierter Polymeroberflächen für robuste klebtechnische Prozesse – OffPlas
ER -
TY - GEN
AU - Schubert, Katrin
ED - Gansel, Christina
ED - Spieß, Constanze
ID - 30983
T2 - WSK Band 6 (Wörterbücher zur Sprach- und Kommunikationswissenschaft): Text- und Diskurslinguistik.
TI - Okkasionalismus
VL - Band 6
ER -
TY - JOUR
AU - Heid, Stefan
AU - Weber, Daniel
AU - Bode, Henrik
AU - Hüllermeier, Eyke
AU - Wallscheid, Oliver
ID - 29649
IS - 54
JF - Journal of Open Source Software
TI - OMG: A scalable and flexible simulation and testing environment toolbox for intelligent microgrid control
VL - 5
ER -
TY - GEN
AU - Manegold, Philipp
ID - 21117
TI - On Batch Proofs of Partial Knowledge
ER -
TY - JOUR
AU - Gharibian, Sevag
AU - Aldi, Marco
AU - de Beaudrap, Niel
AU - Saeedi, Seyran
ID - 16927
JF - Communications in Mathematical Physics
TI - On efficiently solvable cases of Quantum k-SAT
ER -
TY - JOUR
AB - Abstract
In two-phase flows in which the Capillary number is low, errors in the computation of the surface tension force at the interface cause Front-Capturing methods such as Volume of Fluid (VOF) and Level-Set (LS) to develop interfacial spurious currents. To better solve low Capillary number flows, special treatment is required to reduce such spurious currents. Smoothing the phase indicator field to more accurately compute the curvature or adding interfacial artificial viscosity are techniques that can treat this problem. This study explores OpenFOAM, Fluent and StarCCM+ VOF solvers for the classical case of a static bubble/droplet immersed in a continuous aqueous phase, with the focus on the ability of these solvers to adequately reduce spurious currents. The results are expected to be helpful for practicing chemical engineers who use multiphase CFD solvers in their work.
AU - Inguva, Venkatesh
AU - Schulz, Andreas
AU - Kenig, Eugeny Y.
ID - 24120
JF - Chemical Product and Process Modeling
SN - 1934-2659
TI - On methods to reduce spurious currents within VOF solver frameworks. Part 1: a review of the static bubble/droplet
ER -
TY - CONF
AU - Noroozi, Navid
AU - Jackson, Roxanne
AU - Quevedo, Daniel E.
AU - Wirth, Fabian R.
AU - Findeisen, Rolf
ID - 42073
T2 - 2019 IEEE 58th Conference on Decision and Control (CDC)
TI - On noise-to-state stability of stochastic discrete-time systems via finite-step Lyapunov functions
ER -
TY - GEN
AU - Warner, Daniel
ID - 15770
TI - On the complexity of local transformations in SDN overlays
ER -
TY - CHAP
AU - Yigitbas, Enes
AU - Jovanovikj, Ivan
AU - Sauer, Stefan
AU - Engels, Gregor
ID - 15267
T2 - Handling Security, Usability, User Experience and Reliability in User-Centered Development Processes - IFIP WG 13.2/13.5
TI - On the Development of Context-aware Augmented Reality Applications
ER -
TY - JOUR
AB - We investigate self-adjoint matrices A∈Rn,n with respect to their equivariance properties. We show in particular that a matrix is self-adjoint if and only if it is equivariant with respect to the action of a group Γ2(A)⊂O(n) which is isomorphic to ⊗nk=1Z2. If the self-adjoint matrix possesses multiple eigenvalues – this may, for instance, be induced by symmetry properties of an underlying dynamical system – then A is even equivariant with respect to the action of a group Γ(A)≃∏ki=1O(mi) where m1,…,mk are the multiplicities of the eigenvalues λ1,…,λk of A. We discuss implications of this result for equivariant bifurcation problems, and we briefly address further applications for the Procrustes problem, graph symmetries and Taylor expansions.
AU - Dellnitz, Michael
AU - Gebken, Bennet
AU - Gerlach, Raphael
AU - Klus, Stefan
ID - 16712
IS - 2
JF - Dynamical Systems
SN - 1468-9367
TI - On the equivariance properties of self-adjoint matrices
VL - 35
ER -
TY - CONF
AU - Buckmann, Felix
AU - Kenig, Eugeny
ID - 24214
TI - On the experimental study of condensation in pillow plate heat exchangers
ER -
TY - JOUR
AB - In this paper, we implement the multidomain compact finite difference method to numerically study high dimensional chaos by considering the nine-dimensional Lorenz system. Most of the existing numerical methods converge slowly for this kind of problems and this results in inaccurate approximations. Though highly accurate, the compact finite difference method becomes less accurate for problems characterized by chaotic solutions, even with an increase in the number of grid points. As a result, in this work, we adopt the multidomain approach. This approach remarkably improves the results as well as the efficiency of the method.
AU - Kouagou, N.J.
AU - Dlamini, P.G.
AU - Simelane, S.M.
ID - 45785
IS - 4
JF - Alexandria Engineering Journal
KW - Multidomain
KW - Compact finite difference
KW - 9D Lorenz system
SN - 1110-0168
TI - On the multi-domain compact finite difference relaxation method for high dimensional chaos: The nine-dimensional Lorenz system
VL - 59
ER -
TY - JOUR
AU - Kumar Sahoo, Sudhir
AU - Heske, Julian Joachim
AU - Azadi, Sam
AU - Zhang, Zhenzhe
AU - V Tarakina, Nadezda
AU - Oschatz, Martin
AU - Z. Khaliullin, Rustam
AU - Antonietti, Markus
AU - Kühne, Thomas
ID - 17379
IS - 1
JF - Scientific Reports
TI - On the Possibility of Helium Adsorption in Nitrogen Doped Graphitic Materials
VL - 10
ER -
TY - CHAP
AB - Verifiable random functions (VRFs) are essentially digital signatures with additional properties, namely verifiable uniqueness and pseudorandomness, which make VRFs a useful tool, e.g., to prevent enumeration in DNSSEC Authenticated Denial of Existence and the CONIKS key management system, or in the random committee selection of the Algorand blockchain.
Most standard-model VRFs rely on admissible hash functions (AHFs) to achieve security against adaptive attacks in the standard model. Known AHF constructions are based on error-correcting codes, which yield asymptotically efficient constructions. However, previous works do not clarify how the code should be instantiated concretely in the real world. The rate and the minimal distance of the selected code have significant impact on the efficiency of the resulting cryptosystem, therefore it is unclear if and how the aforementioned constructions can be used in practice.
First, we explain inherent limitations of code-based AHFs. Concretely, we assume that even if we were given codes that achieve the well-known Gilbert-Varshamov or McEliece-Rodemich-Rumsey-Welch bounds, existing AHF-based constructions of verifiable random functions (VRFs) can only be instantiated quite inefficiently. Then we introduce and construct computational AHFs (cAHFs). While classical AHFs are information-theoretic, and therefore work even in presence of computationally unbounded adversaries, cAHFs provide only security against computationally bounded adversaries. However, we show that cAHFs can be instantiated significantly more efficiently. Finally, we use our cAHF to construct the currently most efficient verifiable random function with full adaptive security in the standard model.
AU - Jager, Tibor
AU - Niehues, David
ID - 21396
KW - Admissible hash functions
KW - Verifiable random functions
KW - Error-correcting codes
KW - Provable security
SN - 0302-9743
T2 - Lecture Notes in Computer Science
TI - On the Real-World Instantiability of Admissible Hash Functions and Efficient Verifiable Random Functions
ER -
TY - JOUR
AU - Jean, Frédéric
AU - Maslovskaya, Sofya
AU - Zelenko, Igor
ID - 29545
IS - 1
JF - Geometriae Dedicata
KW - Geometry and Topology
SN - 0046-5755
TI - On Weyl’s type theorems and genericity of projective rigidity in sub-Riemannian geometry
VL - 213
ER -
TY - JOUR
AU - Trang, S.
AU - Trenz, M.
AU - Weiger, W.
AU - Tarafdar, M.
AU - Cheung, C.
ID - 49467
JF - European Journal of Information Systems
TI - One app to trace them all? Examining app specifications for mass acceptance of contact-tracing apps
VL - 29
ER -
TY - GEN
AU - Mehring, Oliver
AU - Olsson, Per
AU - Sievers, Sönke
AU - Sofilkanitsch, Christian
ID - 34635
TI - Online Appendix to: Co-movement of Price and Intrinsic Value-Does Accounting Information Matter?
ER -
TY - GEN
AB - We consider an extension of the contextual multi-armed bandit problem, in
which, instead of selecting a single alternative (arm), a learner is supposed
to make a preselection in the form of a subset of alternatives. More
specifically, in each iteration, the learner is presented a set of arms and a
context, both described in terms of feature vectors. The task of the learner is
to preselect $k$ of these arms, among which a final choice is made in a second
step. In our setup, we assume that each arm has a latent (context-dependent)
utility, and that feedback on a preselection is produced according to a
Plackett-Luce model. We propose the CPPL algorithm, which is inspired by the
well-known UCB algorithm, and evaluate this algorithm on synthetic and real
data. In particular, we consider an online algorithm selection scenario, which
served as a main motivation of our problem setting. Here, an instance (which
defines the context) from a certain problem class (such as SAT) can be solved
by different algorithms (the arms), but only $k$ of these algorithms can
actually be run.
AU - El Mesaoudi-Paul, Adil
AU - Bengs, Viktor
AU - Hüllermeier, Eyke
ID - 18017
T2 - arXiv:2002.04275
TI - Online Preselection with Context Information under the Plackett-Luce Model
ER -
TY - GEN
AB - Die Autor*innen werfen einen medienwissenschaftlichen Blick auf die Online-Lehre des Sommersemsters 2020. Dabei betrachten sie unter anderem den Unterschied von klassischen Hörsälen zu den neuen, virtuellen Lernräumen, die aber auch physische Elemente beinhalten. Dabei regen sie an, den Einsatz von Lehr-Lern-Plattformen kritisch zu diskutieren und insgesamt die Lehre mit andauernder Medienreflexion zu begleiten. Ein zentraler Punkt des Papiers ist das Aufzeigen von Inklusions- und Exklusionspotenzialen von Online-Lehre. Vermeintliche Selbstverständnisse spielen hier eine Schlüsselrolle. So wird zum Beispiel häufig eine gewisse technische Infrastruktur seitens der Studierenden vorausgesetzt, die nicht immer vorhanden ist. Andererseits entfallen physische Barrieren, die in Lehrgebäuden vorhanden wären. Die Autor*innen mahnen, bei der Konzeption von Online-Lehre zu vermeiden, nicht-behinderte Personen als die Norm anzunehmen und stattdessen von verschiedenen Körperlichkeiten her zu denken, um die positive Potenziale dieses Lehrmodus zu nutzen. Das Diskussionspapier widmet sich auch ausführlich dem Einsatz von (digitalen) Tools, die weniger als Werkzeuge, denn als Medien der Lehre verstanden werden.
AU - Bohnenkamp, Björn
AU - Burkhardt, Marcus
AU - Grashöfer, Katja
AU - Hlukhovych, Adrianna
AU - Krewani, Angela
AU - Matzner, Tobias
AU - Missomelius, Petra
AU - Raczkowski, Felix
AU - Shnayien, Mary
AU - Weich, Andreas
AU - Wippich, Uwe
ID - 35179
TI - Online-Lehre 2020 – Eine medienwissenschaftliche Perspektive. Diskussionspapier Nr. 10
ER -
TY - GEN
AU - Bohnenkamp, Björn
AU - Burkhardt, Marcus
AU - Grashöfer, Katja
AU - Hlukhovych, Adrianna
AU - Krewani, Angela
AU - Matzner, Tobias
AU - Missomelius, Petra
AU - Shnayien, Marie-Luise
ID - 42912
TI - Online-Lehre 2020 – Eine medienwissenschaftliche Perspektive. Diskussionspapier Nr. 10
ER -
TY - GEN
AU - Beutner, Marc
AU - Schneider, Jennifer Nicole
ID - 47899
IS - 68
T2 - Kölner Zeitschrift für Wirtschaft und Pädagogik
TI - Open Educational Resources- Nicht nur nutzen, sondern auch erstellen! Chancen und Potenziale für die deutsche Berufsbildungslandschaft
VL - 35
ER -
TY - CHAP
AU - Nickchen, Tobias
AU - Engels, Gregor
AU - Lohn, Johannes
ID - 18789
SN - 9783030543334
T2 - Industrializing Additive Manufacturing
TI - Opportunities of 3D Machine Learning for Manufacturability Analysis and Component Recognition in the Additive Manufacturing Process Chain
ER -
TY - CONF
AU - Guetttatfi, Zakarya
AU - Kaufmann, Paul
AU - Platzner, Marco
ID - 3583
T2 - Proceedings of the International Workshop on Applied Reconfigurable Computing (ARC)
TI - Optimal and Greedy Heuristic Approaches for Scheduling and Mapping of Hardware Tasks to Reconfigurable Computing Devices
ER -
TY - JOUR
AU - Lu, Jingyi
AU - Leong, Alex S.
AU - Quevedo, Daniel E.
ID - 35585
IS - 11
JF - International Journal of Robust and Nonlinear Control
KW - Electrical and Electronic Engineering
KW - Industrial and Manufacturing Engineering
KW - Mechanical Engineering
KW - Aerospace Engineering
KW - Biomedical Engineering
KW - General Chemical Engineering
KW - Control and Systems Engineering
SN - 1049-8923
TI - Optimal event‐triggered transmission scheduling for privacy‐preserving wireless state estimation
VL - 30
ER -
TY - CONF
AU - Schulze, Johanna
AU - Eickelmann, Birgit
AU - Drossel, Kerstin
ID - 51993
T2 - 27. Kongress der Deutschen Gesellschaft für Erziehungswissenschaft (DGfE). Universität zu Köln [17.03.2020
TI - Optimale Bedingungen für die systematische Medienkompetenzförderung auf Grundlage schulischer Medienkonzeptarbeit? – Eine Fallstudie an Schulen der Sekundarstufe I mit besonders herausfordernden Schülerkompositionen in NRW
ER -
TY - GEN
AU - Mayer, Stefan
ID - 19999
TI - Optimierung von JMCTest beim Testen von Inter Method Contracts
ER -
TY - CONF
AU - Scheer, D.
AU - Laubenstein, Désirée
ID - 35786
TI - Optimierung von Organisationsstrukturen für die emotionale und soziale Entwicklung? Wissenschaftliche Begleitung des Projekts „Geschwisterklassen“ - online.
ER -
TY - CONF
AB - The Traveling Salesperson Problem (TSP) is one of the best-known combinatorial optimisation problems. However, many real-world problems are composed of several interacting components. The Traveling Thief Problem (TTP) addresses such interactions by combining two combinatorial optimisation problems, namely the TSP and the Knapsack Problem (KP). Recently, a new problem called the node weight dependent Traveling Salesperson Problem (W-TSP) has been introduced where nodes have weights that influence the cost of the tour. In this paper, we compare W-TSP and TTP. We investigate the structure of the optimised tours for W-TSP and TTP and the impact of using each others fitness function. Our experimental results suggest (1) that the W-TSP often can be solved better using the TTP fitness function and (2) final W-TSP and TTP solutions show different distributions when compared with optimal TSP or weighted greedy solutions.
AU - Bossek, Jakob
AU - Neumann, Aneta
AU - Neumann, Frank
ID - 48852
KW - Evolutionary algorithms
KW - Node weight dependent TSP
KW - Traveling Thief Problem
SN - 978-3-030-58111-4
T2 - Parallel Problem Solving from Nature (PPSN XVI)
TI - Optimising Tours for the Weighted Traveling Salesperson Problem and the Traveling Thief Problem: A Structural Comparison of Solutions
ER -
TY - JOUR
AU - van der Meer, R.
AU - Renema, J. J.
AU - Brecht, Benjamin
AU - Silberhorn, Christine
AU - Pinkse, P. W. H.
ID - 29526
IS - 6
JF - Physical Review A
SN - 2469-9926
TI - Optimizing spontaneous parametric down-conversion sources for boson sampling
VL - 101
ER -
TY - CONF
AB - The canonical problem for the class Quantum Merlin-Arthur (QMA) is that of
estimating ground state energies of local Hamiltonians. Perhaps surprisingly,
[Ambainis, CCC 2014] showed that the related, but arguably more natural,
problem of simulating local measurements on ground states of local Hamiltonians
(APX-SIM) is likely harder than QMA. Indeed, [Ambainis, CCC 2014] showed that
APX-SIM is P^QMA[log]-complete, for P^QMA[log] the class of languages decidable
by a P machine making a logarithmic number of adaptive queries to a QMA oracle.
In this work, we show that APX-SIM is P^QMA[log]-complete even when restricted
to more physical Hamiltonians, obtaining as intermediate steps a variety of
related complexity-theoretic results.
We first give a sequence of results which together yield P^QMA[log]-hardness
for APX-SIM on well-motivated Hamiltonians: (1) We show that for NP, StoqMA,
and QMA oracles, a logarithmic number of adaptive queries is equivalent to
polynomially many parallel queries. These equalities simplify the proofs of our
subsequent results. (2) Next, we show that the hardness of APX-SIM is preserved
under Hamiltonian simulations (a la [Cubitt, Montanaro, Piddock, 2017]). As a
byproduct, we obtain a full complexity classification of APX-SIM, showing it is
complete for P, P^||NP, P^||StoqMA, or P^||QMA depending on the Hamiltonians
employed. (3) Leveraging the above, we show that APX-SIM is P^QMA[log]-complete
for any family of Hamiltonians which can efficiently simulate spatially sparse
Hamiltonians, including physically motivated models such as the 2D Heisenberg
model.
Our second focus considers 1D systems: We show that APX-SIM remains
P^QMA[log]-complete even for local Hamiltonians on a 1D line of 8-dimensional
qudits. This uses a number of ideas from above, along with replacing the "query
Hamiltonian" of [Ambainis, CCC 2014] with a new "sifter" construction.
AU - Gharibian, Sevag
AU - Piddock, Stephen
AU - Yirka, Justin
ID - 13226
T2 - Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)
TI - Oracle complexity classes and local measurements on physical Hamiltonians
ER -
TY - JOUR
AU - Keum, Changmin
AU - Becker, David
AU - Archer, Emily
AU - Bock, Harald
AU - Kitzerow, Heinz-Siegfried
AU - Gather, Malte C.
AU - Murawski, Caroline
ID - 35869
IS - 17
JF - Advanced Optical Materials
KW - Atomic and Molecular Physics
KW - and Optics
KW - Electronic
KW - Optical and Magnetic Materials
SN - 2195-1071
TI - Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter
VL - 8
ER -
TY - JOUR
AU - Andexer, Jennifer N.
AU - Beifuss, Uwe
AU - Beuerle, Florian
AU - Brasholz, Malte
AU - Breinbauer, Rolf
AU - Ernst, Martin
AU - Greb, Julian
AU - Gulder, Tobias
AU - Hüttel, Wolfgang
AU - Kath‐Schorr, Stephanie
AU - Kordes, Markus
AU - Lehmann, Matthias
AU - Lindel, Thomas
AU - Luy, Burkhard
AU - Mück‐Lichtenfeld, Christian
AU - Muhle, Claudia
AU - Narine, Arun
AU - Niemeyer, Jörg
AU - Paradies, Jan
AU - Pfau, Roland
AU - Pietruszka, Jörg
AU - Schaschke, Norbert
AU - Senge, Mathias
AU - Straub, Bernd F.
AU - Werner, Thomas
AU - Werz, Daniel B.
AU - Winter, Christian
ID - 37956
IS - 3
JF - Nachrichten aus der Chemie
KW - General Chemical Engineering
KW - General Chemistry
SN - 1439-9598
TI - Organische Chemie
VL - 68
ER -
TY - GEN
ID - 20703
SN - 1424-3636
TI - Orientierungen in der digitalen Welt
ER -
TY - BOOK
ED - Herzig, Bardo
ED - Klar, Tilman-Mathies
ED - Martin, Alexander
ED - Meister, Dorothee
ID - 20705
SN - 1424-3636
TI - Orientierungen in der digitalen Welt
ER -
TY - BOOK
ED - Herzig, Bardo
ED - Klar, T.-M.
ED - Martin, A.
ED - Meister, D. M.
ID - 40311
SN - 1424-3636
TI - Orientierungen in der digitalen Welt
VL - 39
ER -
TY - CONF
AU - Hanschke, L
AU - Schweickert, L
AU - Camilo López Carreño, J
AU - Schöll, E
AU - Zeuner, K.D
AU - Lettner, T
AU - Zubizarreta Casalengua, E
AU - Reindl, M
AU - Covre da Silva, S.F
AU - Trotta, R
AU - Finley, J.J
AU - Rastelli, A
AU - Del Valle, E
AU - Laussy, F.P
AU - Zwiller, V
AU - Müller, K
AU - Jöns, Klaus D.
ID - 41895
TI - Origin of Antibunching in Resonance Fluorescence
VL - 125
ER -
TY - JOUR
AU - Duschner, Paul
ID - 39591
JF - Paderborner Historische Mitteilungen
TI - Ostasiatika in Paderborn: Zur Sammlung Sigrid Tenge-Erb und Richard Erb
VL - 33
ER -
TY - CONF
AU - Bondarenko, Alexander
AU - Fröbe, Maik
AU - Beloucif, Meriem
AU - Gienapp, Lukas
AU - Ajjour, Yamen
AU - Panchenko, Alexander
AU - Biemann, Chris
AU - Stein, Benno
AU - Wachsmuth, Henning
AU - Potthast, Martin
AU - Hagen, Matthias
ID - 20166
T2 - CEUR Workshop Proceedings
TI - Overview of Touché 2020: Argument Retrieval
VL - 2696
ER -
TY - CONF
AU - Dalvandi, Sadegh
AU - Doherty, Simon
AU - Dongol, Brijesh
AU - Wehrheim, Heike
ED - Hirschfeld, Robert
ED - Pape, Tobias
ID - 21017
T2 - 34th European Conference on Object-Oriented Programming, {ECOOP} 2020, November 15-17, 2020, Berlin, Germany (Virtual Conference)
TI - Owicki-Gries Reasoning for C11 RAR
VL - 166
ER -
TY - JOUR
AU - Dalvandi, Sadegh
AU - Doherty, Simon
AU - Dongol, Brijesh
AU - Wehrheim, Heike
ID - 21016
IS - 2
JF - Dagstuhl Artifacts Ser.
TI - Owicki-Gries Reasoning for C11 RAR (Artifact)
VL - 6
ER -
TY - BOOK
AU - Kowatz, Jannik
AU - Teutenberg, Dominik
AU - Meschut, Gerson
ID - 20655
SN - 978-3-96780-063-0
TI - P 1221 - Auslegungsmethode für zyklisch beanspruchte Stahl/CFK-Klebverbindungen unter besonderer Berücksichtigung des Rissfortschritts
VL - P 1221
ER -
TY - GEN
AU - Moritz, Tilman
ID - 49018
T2 - Rottenburger Jahrbuch für Kirchengeschichte
TI - P. O. Adiele: The Popes, the Catholic Church and the Transatlantic Enslavement of Black Africans 1418–1839. Hildesheim u. a. 2017
VL - 38
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 29140
T2 - Mathematical Reviews
TI - Paakki, Jukka, "Arti Salomaa: Mathematician, Computer Scientist, and Teacher. A Thematic Biography", Springer: Cham 2019
ER -
TY - CONF
AU - Eickelmann, Birgit
AU - Schrand, C.
ID - 51968
T2 - Input und Workshop im Rahmen der Online-Fachtagung 'Lehren und Lernen in Corona-Zeiten. Herausforderungen im Schuljahr 2020/2021'. Westfälische Wilhelms-Universität Münster
TI - Pädagogisch reflektierte Nutzung digitaler Technologien
ER -
TY - BOOK
ED - Göttmann, Frank
ED - Seng, Eva- Maria
ED - Wittig, Michael
ID - 19472
TI - Paderborner Historische Forschungen (bislang 18 Bände, Herausgebertätigkeit Reihe)
ER -
TY - GEN
AU - Herding, Jana
ID - 45359
TI - Paderborner Qualitätsstern zur Einschätzung der Kooperation im Übergang Kita – Grundschule. Herausgegeben von: Höke, Julia; Büker, Petra, Ogrodowski, Jana & Vollmann, Britta. Unter Mitarbeit von Alina Bruyn und Theresa Driller. Dieses Instrument liegt seit 2021 ebenfalls in vollständiger englischer Übersetzung vor: https://blogs.uni-paderborn.de/pq3-international/
VL - 3
ER -
TY - JOUR
AU - Seng, Eva- Maria
ID - 18844
JF - Vortrag am 17.09.2016 auf dem 34. Weltkongreß für Kunstgeschichte (CIHA) in Beijing
TI - Pall Mall. From the sportsground to the urban pleasure ground
VL - (im Druck)
ER -
TY - JOUR
AU - Hou, Peng
AU - Oechsle, Peter
AU - Kuckling, Dirk
AU - Paradies, Jan
ID - 23857
IS - 10
JF - Macromolecular Rapid Communications
SN - 1022-1336
TI - Palladium‐Catalyzed Polycondensation for the Synthesis of Poly(Aryl)Sulfides
VL - 41
ER -
TY - JOUR
AU - Hou, Peng
AU - Oechsle, Peter
AU - Kuckling, Dirk
AU - Paradies, Jan
ID - 22236
JF - Macromolecular Rapid Communications
SN - 1022-1336
TI - Palladium‐Catalyzed Polycondensation for the Synthesis of Poly(Aryl)Sulfides
ER -
TY - JOUR
AU - Schryen, Guido
ID - 15022
IS - 1
JF - European Journal of Operational Research
TI - Parallel computational optimization in operations research: A new integrative framework, literature review and research directions
VL - 287
ER -
TY - THES
AB - Die additive Fertigung mittels Laser Powderbed Fusion Verfahren (L-PBF) von Metallen wird zunehmend genutzt, um Funktionsbauteile endkonturnah zu fertigen. Die in der vor-liegenden Arbeit untersuchte Parameter- und Prozessoptimierung liefert einen Beitrag zur wirtschaftlichen Nutzung des L-PBF und zeigt, dass höhere Aufbauraten bei der ganzheit-lichen Betrachtung des Prozesses realisierbar sind.
Die Parameter- und Prozessoptimierung erfordert eine Untersuchung des Einflusses der Fertigungs- und Nachbearbeitungsparameter auf das erzeugte Volumen sowie auf die Mikrostruktur und die resultierenden Materialeigenschaften. Das Ziel der vorliegenden Arbeit ist die Entwicklung einer optimierten Prozessführung mit abschließender Bewer-tung der Wirtschaftlichkeit. Mit dem entwickelten Gesamtprozess wird eine um den Faktor 1,6 höhere Aufbaurate erzielt. Des Weiteren wird die Methodik zur Erarbeitung des opti-mierten Prozessfensters beschrieben, sodass die Herangehensweise auf weitere Werk-stoffe angewendet werden kann. Die mechanischen Eigenschaften werden für den stati-schen und dynamischen Lastfall untersucht und mit der Mikrostruktur korreliert. Abschlie-ßend wird die Prozessoptimierung zur Fertigung eines Demonstrators eingesetzt und wirtschaftlich validiert. Die Ergebnisse zeigen, dass durch das hier angewendete Vorge-hen eine Prozesszeitreduktion von 22,5% und eine Kostenreduktion von 11% realisiert werden kann.
AU - Ahlers, Dominik
ID - 21209
KW - Additive Manufacturing
KW - SLM
SN - 978-3844074246
TI - Parameter- und Prozessoptimierung für den additiven Fertigungsprozess im Pulverbett am Beispiel der Legierung Ti6Al4V
VL - 19
ER -
TY - CONF
AU - Mahmood, Yasir
AU - Meier, Arne
ID - 45848
SN - 0302-9743
T2 - Lecture Notes in Computer Science
TI - Parameterised Complexity of Model Checking and Satisfiability in Propositional Dependence Logic
ER -
TY - JOUR
AB - Abstract
Abductive reasoning is a non-monotonic formalism stemming from the work of Peirce. It describes the process of deriving the most plausible explanations of known facts. Considering the positive version, asking for sets of variables as explanations, we study, besides the problem of wether there exists a set of explanations, two explanation size limited variants of this reasoning problem (less than or equal to, and equal to a given size bound). In this paper, we present a thorough two-dimensional classification of these problems: the first dimension is regarding the parameterized complexity under a wealth of different parameterizations, and the second dimension spans through all possible Boolean fragments of these problems in Schaefer’s constraint satisfaction framework with co-clones (T. J. Schaefer. The complexity of satisfiability problems. In Proceedings of the 10th Annual ACM Symposium on Theory of Computing, May 1–3, 1978, San Diego, California, USA, R.J. Lipton, W.A. Burkhard, W.J. Savitch, E.P. Friedman, A.V. Aho eds, pp. 216–226. ACM, 1978). Thereby, we almost complete the parameterized complexity classification program initiated by Fellows et al. (The parameterized complexity of abduction. In Proceedings of the Twenty-Sixth AAAI Conference on Articial Intelligence, July 22–26, 2012, Toronto, Ontario, Canada, J. Homann, B. Selman eds. AAAI Press, 2012), partially building on the results by Nordh and Zanuttini (What makes propositional abduction tractable. Artificial Intelligence, 172, 1245–1284, 2008). In this process, we outline a fine-grained analysis of the inherent parameterized intractability of these problems and pinpoint their FPT parts. As the standard algebraic approach is not applicable to our problems, we develop an alternative method that makes the algebraic tools partially available again.
AU - Mahmood, Yasir
AU - Meier, Arne
AU - Schmidt, Johannes
ID - 45845
IS - 1
JF - Journal of Logic and Computation
KW - Logic
KW - Hardware and Architecture
KW - Arts and Humanities (miscellaneous)
KW - Software
KW - Theoretical Computer Science
SN - 0955-792X
TI - Parameterized complexity of abduction in Schaefer’s framework
VL - 31
ER -
TY - CONF
AU - Tolksdorf, Nils Frederik
AU - Rohlfing, Katharina J.
ID - 24904
T2 - 2020 29th IEEE International Conference on Robot and Human Interactive Communication (RO-MAN)
TI - Parents’ Views on Using Social Robots for Language Learning
ER -
TY - JOUR
AB - Multi-objective optimization is an active field of research that has many applications. Owing to its success and because decision-making processes are becoming more and more complex, there is a recent trend for incorporating many objectives into such problems. The challenge with such problems, however, is that the dimensions of the solution sets—the so-called Pareto sets and fronts—grow with the number of objectives. It is thus no longer possible to compute or to approximate the entire solution set of a given problem that contains many (e.g. more than three) objectives. On the other hand, the computation of single solutions (e.g. via scalarization methods) leads to unsatisfying results in many cases, even if user preferences are incorporated. In this article, the Pareto Explorer tool is presented—a global/local exploration tool for the treatment of many-objective optimization problems (MaOPs). In the first step, a solution of the problem is computed via a global search algorithm that ideally already includes user preferences. In the second step, a local search along the Pareto set/front of the given MaOP is performed in user specified directions. For this, several continuation-like procedures are proposed that can incorporate preferences defined in decision, objective, or in weight space. The applicability and usefulness of Pareto Explorer is demonstrated on benchmark problems as well as on an application from industrial laundry design.
AU - Schütze, Oliver
AU - Cuate, Oliver
AU - Martín, Adanay
AU - Peitz, Sebastian
AU - Dellnitz, Michael
ID - 10596
IS - 5
JF - Engineering Optimization
SN - 0305-215X
TI - Pareto Explorer: a global/local exploration tool for many-objective optimization problems
VL - 52
ER -
TY - CONF
AU - Fischer, Andreas
AU - Janneck, Jonas
AU - Kussmaul, Jörn
AU - Krätzschmar, Nikolas
AU - Kerschbaum, Florian
AU - Bodden, Eric
ID - 20509
T2 - 2020 IEEE Computer Security Foundations Symposium (CSF)
TI - PASAPTO: Policy-aware Security and Performance Trade-off Analysis - Computation on Encrypted Data with Restricted Leakage
ER -
TY - JOUR
AU - Welling, W
AU - Benjaminse, A
AU - Lemmink, K
AU - Gokeler, A
ID - 20422
IS - 3
JF - Knee
SN - 0968-0160
TI - Passing return to sports tests after ACL reconstruction is associated with greater likelihood for return to sport but fail to identify second injury risk.
VL - 27
ER -
TY - GEN
AB - Die Erfindung betrifft ein Gerät mit wenigstens einem elastisch verformbaren Bauteil als Strukturteil und/oder Lagerteil, auf das im Betriebsverlauf von wechselnden Betriebszuständen abhängige, unterschiedliche Verformungskräfte einwirken, die zu einem die Bauteilnutzungsdauer begrenzenden Bauteilverschleiß führen, und mit einer Einrichtung zur Bestimmung der Bauteilnutzungsdauer und einer verschleißbedingten Bauteil-Restnutzungsdauer. Erfindungsgemäß wird ein sich zeitversetzt wiederholender, jeweils gleicher Betriebszustand vorbestimmt, dem eine jeweils gleiche Verformungskraft zugeordnet ist, durch die das elastisch verformbare Bauteilmaterial verformt wird. Ein solcher vorbestimmter Betriebszustand wird jeweils von einer Mess- und Auswerteeinheit erkannt und ein Messvorgang durch ein Startsignal selbsttätig gestartet, wobei mit wenigstens einem bauteilzugeordneten Beschleunigungssensor, die aktuelle Beschleunigung der Verformung oder daraus abgeleitete Kennwerte als Kenngröße für eine aktuelle Bauteilsteifigkeit gemessen und jeweils in einer Messkurve gespeichert und verglichen wird.
AU - Reinke, Kai
AU - Bender, Amelie
AU - Meyer, Tobias
AU - Sextro, Walter
AU - Kimotho, James Kuria
ID - 9981
TI - Patent EP 3 358 332 B1: Verfahren zur Bestimmung des Beginns einer verschleißbedingten Bauteil-Restnutzungsdauer eines elastisch verformbaren Bauteils, als Strukturteil und/oder Lagerteil eines Geräts.
ER -
TY - CONF
AU - Anacker, Harald
AU - Dumitrescu, Roman
AU - Kharatyan, Aschot
AU - Lipsmeier, Andre
ID - 21380
T2 - Proceedings of the Design Society
TI - Pattern based systems engineering – application of solution patterns in the design of intelligent technical systems
ER -
TY - CONF
AU - Böttcher, Stefan
AU - Hartel, Rita
AU - Peeters, Sven
ID - 18039
SN - 9781728164571
T2 - 2020 Data Compression Conference (DCC) (Poster)
TI - Pattern Search in Grammar-Compressed Graphs
ER -
TY - JOUR
AU - Drewel, Marvin
AU - Özcan, Leon
AU - Koldewey, Christian
AU - Gausemeier, Jürgen
ID - 27098
JF - Creativity and Innovation Management
TI - Pattern‐based development of digital platforms
ER -
TY - JOUR
AU - Drewel, Marvin
AU - Özcan, Leon
AU - Koldewey, Christian
AU - Gausemeier, Jürgen
ID - 21281
JF - Creativity and Innovation Management
SN - 0963-1690
TI - Pattern‐based development of digital platforms
ER -
TY - JOUR
AU - Hüther, Niklas
AU - Robinson, David T
AU - Sievers, Sönke
AU - Hartmann-Wendels, Thomas
ID - 34638
IS - 4
JF - Management Science
TI - Paying for performance in private equity: Evidence from venture capital partnerships
VL - 66
ER -
TY - CHAP
AU - Sloane, Hannah
AU - Kremer, H.-Hugo
ED - Fuge, Juliane
ED - Kremer, H.-Hugo
ID - 26021
T2 - Mentoring in Hochschuldidaktik und -praxis - Eine Reflexion wissenschaftlicher Erkenntnisse und praktischer Erfahrungen
TI - Peer Mentoring an der Fakultät für Wirtschaftswissenschaften - Einblicke in ein Schulungskonzept für Peer Mentor*innen
VL - 2
ER -
TY - CHAP
AU - Sloane, Hannah
AU - Kremer, H.-Hugo
ED - Fuge, Juliane
ED - Kremer, H.-Hugo
ID - 26020
T2 - Mentoring in Hochschuldidaktik und -praxis - Eine Reflexion wissenschaftlicher Erkenntnisse und praktischer Erfahrungen
TI - Peer Mentoring an der Fakultät für Wirtschaftswissenschaften - Konzept und Realisierungsformen
ER -
TY - JOUR
AB - Zusammenfassung. Die Relevanz von Peers für die Entwicklung von Jugendlichen konnte in verschiedenen Studien bereits bestätigt werden. Im Unterricht zeigt sich dies u.a. durch höhere situative Motivation und Freude sowie geringerem Stressempfinden während sozialer Interaktionen mit Mitschülerinnen und -schülern verglichen mit Einzelarbeitssituationen. Allerdings stellte sich auch heraus, dass Jugendliche mit Verhaltensauffälligkeiten Schwierigkeiten im Knüpfen und Aufrechterhalten von sozialen Kontakten und Freundschaften haben. Während in bisherigen Studien Verhalten als dichotome Variable untersucht wurde, wird hier ein dimensionaler, personzentrierter Ansatz zur Identifizierung von Gruppen mit heterogenen Verhaltensweisen verfolgt. Ziel dieses Beitrags ist daher die Untersuchung von Effekten sozialer Interaktionen im Unterricht auf das emotionale Erleben von Jugendlichen mit heterogenen Verhaltensweisen. Zudem wird ein möglicher Moderationseffekt der Klassenkomposition in Bezug auf das Verhalten überprüft. Hierzu wurden N = 719 Schülerinnen und Schülern der fünften und sechsten Jahrgangsstufe unter Verwendung der experience sampling method zu zwei bis drei Messzeitpunkten pro Tag an fünf aufeinanderfolgenden Schultagen zu ihrem aktuellen emotionalen Erleben und ihrem sozialen Kontext befragt. Insgesamt lagen 8870 „Momentaufnahmen“ des emotionalen Erlebens und von Unterrichtssituationen vor. Auf der Grundlage von Verhaltenseinschätzungen durch Lehrpersonen wurden mittels latenter Profilanalysen drei Profiltypen innerhalb der Schülerschaft identifiziert: Jugendliche mit adaptivem, internalisierendem und externalisierendem Verhalten. Ergebnisse von Multilevel-Strukturgleichungsmodellen zeigen, dass Jugendliche in Unterrichtssituationen, in denen sie mit ihren Peers interagieren (z.B. in Partner- oder Gruppenarbeiten), motivierter und weniger gestresst sind als in Einzelsituationen. Für Jugendliche mit externalisierendem oder internalisierendem Verhalten ist dieser Effekt stärker ausgeprägt. Die geringfügigen, jedoch nicht signifikanten differenziellen moderierenden Effekte verweisen zudem darauf, dass der Zusammenhang des emotionalen Erlebens und der Peerinteraktionen für Jugendliche nicht durch ihr Klassenumfeld in Bezug auf prosoziales oder problematisches Verhalten moderiert wird. Die Ergebnisse werden sowohl methodisch als auch inhaltlich diskutiert, unter anderem in Bezug auf die Frage, ob und inwiefern Peers Quellen aktueller Motivation im Unterricht darstellen.
AU - Knickenberg, Margarita
AU - Zurbriggen, Carmen
AU - Schmidt, Philipp
ID - 33435
JF - Zeitschrift für Pädagogische Psychologie
KW - Developmental and Educational Psychology
SN - 1010-0652
TI - Peers als Quelle aktueller Motivation?
ER -
TY - CONF
AB - In this paper, we rely on previous work proposing a modularized version of CMA-ES, which captures several alterations to the conventional CMA-ES developed in recent years. Each alteration provides significant advantages under certain problem properties, e.g., multi-modality, high conditioning. These distinct advancements are implemented as modules which result in 4608 unique versions of CMA-ES. Previous findings illustrate the competitive advantage of enabling and disabling the aforementioned modules for different optimization problems. Yet, this modular CMA-ES is lacking a method to automatically determine when the activation of specific modules is auspicious and when it is not. We propose a well-performing instance-specific algorithm configuration model which selects an (almost) optimal configuration of modules for a given problem instance. In addition, the structure of this configuration model is able to capture inter-dependencies between modules, e.g., two (or more) modules might only be advantageous in unison for some problem types, making the orchestration of modules a crucial task. This is accomplished by chaining multiple random forest classifiers together into a so-called Classifier Chain based on a set of numerical features extracted by means of Exploratory Landscape Analysis (ELA) to describe the given problem instances.
AU - Prager, Raphael Patrick
AU - Trautmann, Heike
AU - Wang, Hao
AU - Bäck, Thomas H. W.
AU - Kerschke, Pascal
ID - 46328
T2 - Proceedings of the IEEE Symposium Series on Computational Intelligence (SSCI)
TI - Per-Instance Configuration of the Modularized CMA-ES by Means of Classifier Chains and Exploratory Landscape Analysis
ER -
TY - JOUR
AU - Knickenberg, Margarita
AU - Zurbriggen, Carmen
ID - 33437
JF - SCHULE inklusiv
TI - Perceptions of Inclusion Questionnaire (PIQ)
ER -