@inbook{8573, author = {{Liebendörfer, Michael}}, booktitle = {{Beiträge zum Mathematikunterricht 2018}}, editor = {{Didaktik der Mathematik der Universität Paderborn, Fachgruppe}}, pages = {{1171--1174}}, publisher = {{WTM-Verlag}}, title = {{{Psychologische Grundbedürfnisse im frühen Mathematikstudium}}}, year = {{2018}}, } @inbook{8574, author = {{Liebendörfer, Michael and Kuklinski, Christiane and Hochmuth, Reinhard}}, booktitle = {{Beiträge zum Mathematikunterricht 2018}}, editor = {{Didaktik der Mathematik der Universität Paderborn, Fachgruppe}}, pages = {{1175--1178}}, publisher = {{WTM-Verlag}}, title = {{{Auswirkungen von innovativen Vorlesungen für Lehramtsstudierende in der Studieneingangsphase}}}, year = {{2018}}, } @book{8576, author = {{Liebendörfer, Michael}}, isbn = {{978-3-658-22506-3 978-3-658-22507-0}}, publisher = {{Springer Fachmedien Wiesbaden}}, title = {{{Motivationsentwicklung im Mathematikstudium}}}, doi = {{10.1007/978-3-658-22507-0}}, year = {{2018}}, } @inproceedings{8750, abstract = {{In this article we propose a descent method for equality and inequality constrained multiobjective optimization problems (MOPs) which generalizes the steepest descent method for unconstrained MOPs by Fliege and Svaiter to constrained problems by using two active set strategies. Under some regularity assumptions on the problem, we show that accumulation points of our descent method satisfy a necessary condition for local Pareto optimality. Finally, we show the typical behavior of our method in a numerical example.}}, author = {{Gebken, Bennet and Peitz, Sebastian and Dellnitz, Michael}}, booktitle = {{Numerical and Evolutionary Optimization – NEO 2017}}, isbn = {{9783319961033}}, issn = {{1860-949X}}, title = {{{A Descent Method for Equality and Inequality Constrained Multiobjective Optimization Problems}}}, doi = {{10.1007/978-3-319-96104-0_2}}, year = {{2018}}, } @article{8751, abstract = {{Multiobjective optimization plays an increasingly important role in modern applications, where several criteria are often of equal importance. The task in multiobjective optimization and multiobjective optimal control is therefore to compute the set of optimal compromises (the Pareto set) between the conflicting objectives. The advances in algorithms and the increasing interest in Pareto-optimal solutions have led to a wide range of new applications related to optimal and feedback control, which results in new challenges such as expensive models or real-time applicability. Since the Pareto set generally consists of an infinite number of solutions, the computational effort can quickly become challenging, which is particularly problematic when the objectives are costly to evaluate or when a solution has to be presented very quickly. This article gives an overview of recent developments in accelerating multiobjective optimal control for complex problems where either PDE constraints are present or where a feedback behavior has to be achieved. In the first case, surrogate models yield significant speed-ups. Besides classical meta-modeling techniques for multiobjective optimization, a promising alternative for control problems is to introduce a surrogate model for the system dynamics. In the case of real-time requirements, various promising model predictive control approaches have been proposed, using either fast online solvers or offline-online decomposition. We also briefly comment on dimension reduction in many-objective optimization problems as another technique for reducing the numerical effort.}}, author = {{Peitz, Sebastian and Dellnitz, Michael}}, issn = {{2297-8747}}, journal = {{Mathematical and Computational Applications}}, number = {{2}}, title = {{{A Survey of Recent Trends in Multiobjective Optimal Control—Surrogate Models, Feedback Control and Objective Reduction}}}, doi = {{10.3390/mca23020030}}, volume = {{23}}, year = {{2018}}, } @inbook{8754, abstract = {{In this chapter, we combine a global, derivative-free subdivision algorithm for multiobjective optimization problems with a posteriori error estimates for reduced-order models based on Proper Orthogonal Decomposition in order to efficiently solve multiobjective optimization problems governed by partial differential equations. An error bound for a semilinear heat equation is developed in such a way that the errors in the conflicting objectives can be estimated individually. The resulting algorithm constructs a library of locally valid reduced-order models online using a Greedy (worst-first) search. Using this approach, the number of evaluations of the full-order model can be reduced by a factor of more than 1000.}}, author = {{Beermann, Dennis and Dellnitz, Michael and Peitz, Sebastian and Volkwein, Stefan}}, booktitle = {{Reduced-Order Modeling (ROM) for Simulation and Optimization}}, isbn = {{9783319753188}}, pages = {{47--72}}, title = {{{Set-Oriented Multiobjective Optimal Control of PDEs Using Proper Orthogonal Decomposition}}}, doi = {{10.1007/978-3-319-75319-5_3}}, year = {{2018}}, } @article{8755, abstract = {{Dynamic mode decomposition (DMD) is a recently developed tool for the analysis of the behavior of complex dynamical systems. In this paper, we will propose an extension of DMD that exploits low-rank tensor decompositions of potentially high-dimensional data sets to compute the corresponding DMD modes and eigenvalues. The goal is to reduce the computational complexity and also the amount of memory required to store the data in order to mitigate the curse of dimensionality. The efficiency of these tensor-based methods will be illustrated with the aid of several different fluid dynamics problems such as the von Kármán vortex street and the simulation of two merging vortices.}}, author = {{Klus, Stefan and Gelß, Patrick and Peitz, Sebastian and Schütte, Christof}}, issn = {{0951-7715}}, journal = {{Nonlinearity}}, number = {{7}}, pages = {{3359--3380}}, title = {{{Tensor-based dynamic mode decomposition}}}, doi = {{10.1088/1361-6544/aabc8f}}, volume = {{31}}, year = {{2018}}, } @inproceedings{8757, abstract = {{A framework for set‐oriented multiobjective optimal control of partial differential equations using reduced order modeling has recently been developed [1]. Following concepts from localized reduced bases methods, error estimators for the reduced cost functionals are utilized to construct a library of locally valid reduced order models. This way, a superset of the Pareto set can efficiently be computed while maintaining a prescribed error bound. In this article, this algorithm is applied to a problem with non‐smooth objective functionals. Using an academic example, we show that the extension to non‐smooth problems can be realized in a straightforward manner. We then discuss the implications on the numerical results.}}, author = {{Beermann, Dennis and Dellnitz, Michael and Peitz, Sebastian and Volkwein, Stefan}}, booktitle = {{PAMM}}, issn = {{1617-7061}}, pages = {{51--54}}, title = {{{POD-based multiobjective optimal control of PDEs with non-smooth objectives}}}, doi = {{10.1002/pamm.201710015}}, year = {{2018}}, } @article{8801, author = {{Schulze Darup, Moritz and Redder, Adrian and Quevedo, Daniel E.}}, issn = {{2475-1456}}, journal = {{IEEE Control Systems Letters}}, pages = {{37--42}}, title = {{{Encrypted Cooperative Control Based on Structured Feedback}}}, doi = {{10.1109/lcsys.2018.2851152}}, year = {{2018}}, } @inproceedings{8812, author = {{Schulze Darup, Moritz and Redder, Adrian and Quevedo, Daniel E.}}, booktitle = {{IFAC-PapersOnLine}}, issn = {{2405-8963}}, pages = {{535--542}}, title = {{{Encrypted cloud-based MPC for linear systems with input constraints}}}, doi = {{10.1016/j.ifacol.2018.11.035}}, year = {{2018}}, } @inproceedings{8815, author = {{Schulze Darup, Moritz and Redder, Adrian and Quevedo, Daniel}}, booktitle = {{2018 Annual American Control Conference (ACC)}}, isbn = {{9781538654286}}, title = {{{A fixed-point implementation of explicit MPC laws}}}, doi = {{10.23919/acc.2018.8431781}}, year = {{2018}}, } @misc{8844, author = {{Jovanovikj, Ivan and Güldali, Baris}}, title = {{{Presentation: Who Guards the Guards? On the Validation of Test Case Migration}}}, year = {{2018}}, } @article{9606, author = {{Liu, Jia and Jager, Tibor and Kakvi, Saqib and Warinschi, Bogdan}}, issn = {{0925-1022}}, journal = {{Designs, Codes and Cryptography}}, pages = {{2549--2586}}, title = {{{How to build time-lock encryption}}}, doi = {{10.1007/s10623-018-0461-x}}, year = {{2018}}, } @article{9614, author = {{Eigner, Christof and Santandrea, Matteo and Padberg, Laura and Volk, Martin F. and Rüter, Christian E. and Herrmann, Harald and Kip, Detlef and Silberhorn, Christine}}, issn = {{1094-4087}}, journal = {{Optics Express}}, title = {{{Periodically poled ridge waveguides in KTP for second harmonic generation in the UV regime}}}, doi = {{10.1364/oe.26.028827}}, year = {{2018}}, } @article{9619, author = {{Ansari, V. and Roccia, E. and Santandrea, Matteo and Doostdar, M. and Eigner, Christof and Padberg, Laura and Gianani, I. and Sbroscia, M. and Donohue, J. M. and Mancino, L. and Barbieri, M. and Silberhorn, Christine}}, issn = {{1094-4087}}, journal = {{Optics Express}}, title = {{{Heralded generation of high-purity ultrashort single photons in programmable temporal shapes}}}, doi = {{10.1364/oe.26.002764}}, year = {{2018}}, } @inproceedings{9677, author = {{Meyer-Scott, Evan and Prasannan, Nidhin and Montaut, Nicola and Tiedau, Johannes and Harder, Georg and Sansoni, Linda and Herrmann, Harald and Eigner, Christof and Ricken, Raimund and Quiring, Viktor and Bartley, Tim and Barkhofen, Sonja and Silberhorn, Christine}}, booktitle = {{Frontiers in Optics / Laser Science}}, isbn = {{9781943580460}}, title = {{{Engineering integrated sources of entangled photon pairs}}}, doi = {{10.1364/ls.2018.lm3b.1}}, year = {{2018}}, } @inproceedings{9678, author = {{Meyer-Scott, Evan and Prasannan, Nidhin and Montaut, Nicola and Tiedau, Johannes and Harder, Georg and Sansoni, Linda and Herrmann, Harald and Eigner, Christof and Ricken, Raimund and Quiring, Viktor and Bartley, Tim J. and Barkhofen, Sonja and Silberhorn, Christine}}, booktitle = {{Frontiers in Optics / Laser Science}}, isbn = {{9781943580460}}, title = {{{Engineering integrated sources of entangled photon pairs}}}, doi = {{10.1364/ls.2018.lm3b.1}}, year = {{2018}}, } @misc{9687, author = {{Beverungen, Daniel and Wolf, Verena and Bartelheimer, Christian}}, booktitle = {{Service Business Development. spot.on marketing - Der Newsletter für Marketing und Business Development}}, title = {{{Dienstleistungssysteme erfolgreich digital transformieren}}}, year = {{2018}}, } @inbook{9694, author = {{Tönnies, Merle and Lienen, Anna}}, booktitle = {{Resistance and the City. Negotiating Urban Identities: Race, Class, Gender}}, editor = {{Ehland, Christoph and Fischer, Pascal}}, pages = {{66--82}}, publisher = {{Brill}}, title = {{{Changing Uses of the City in Contemporary Black British Novels}}}, volume = {{28}}, year = {{2018}}, } @inproceedings{9709, author = {{Gernreich, Chris and Wolf, Verena and Bartelheimer, Christian and Prinz, Christopher}}, booktitle = {{Proceedings of the 39th International Conference on Information Systems}}, location = {{San Francisco, USA}}, title = {{{The Impact of Process Automation on Manufacturers’ Long-Term Knowledge}}}, year = {{2018}}, }