@article{64403, author = {{Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R. and Pusch, Tobias and La Tona, Eros and Michalzik, Rainer}}, journal = {{2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC 2017)}}, pages = {{108}}, title = {{{Thermally induced birefringence tuning of 37 GHz in VCSELs}}}, doi = {{10.1109/cleoe-eqec.2017.8086349}}, volume = {{1}}, year = {{2017}}, } @article{64392, author = {{Finkeldey, Markus and Brenner, Carsten and Gerhardt, Nils Christopher and Hofmann, Martin R. and Göring, Lena}}, journal = {{DGaO-Proceedings}}, title = {{{Digital holographic microscopy of buried specimen using a common-path reflective setup}}}, volume = {{118}}, year = {{2017}}, } @inbook{64768, author = {{Nikitin, Natalie}}, booktitle = {{50th Seminar “Sophus Lie”, Będlewo, Poland, September 26 – October 1, 2016. Dedicated to Professor Karl Heinrich Hofmann on the occasion of his 85th birthday}}, isbn = {{978-83-86806-37-9}}, keywords = {{22E65, 22A10, 26E15, 46E50}}, pages = {{363–373}}, publisher = {{Warsaw: Polish Academy of Sciences, Institute of Mathematics}}, title = {{{Differentiability along one-parameter subgroups compared to differentiability on Lie groups as manifolds}}}, doi = {{10.4064/bc113-0-17}}, year = {{2017}}, } @article{64635, author = {{Glöckner, Helge and Neeb, Karl-Hermann}}, issn = {{0019-3577}}, journal = {{Indagationes Mathematicae}}, keywords = {{58D05, 22E55, 52A20}}, number = {{4}}, pages = {{760–783}}, title = {{{Diffeomorphism groups of compact convex sets}}}, doi = {{10.1016/j.indag.2017.04.004}}, volume = {{28}}, year = {{2017}}, } @article{64638, author = {{Glöckner, Helge and Raja, C. R. E.}}, issn = {{1433-5883}}, journal = {{Journal of Group Theory}}, keywords = {{22D05, 22A10, 22D40}}, number = {{3}}, pages = {{589–619}}, title = {{{Expansive automorphisms of totally disconnected, locally compact groups}}}, doi = {{10.1515/jgth-2016-0051}}, volume = {{20}}, year = {{2017}}, } @article{64636, author = {{Glöckner, Helge}}, issn = {{0002-9939}}, journal = {{Proceedings of the American Mathematical Society}}, keywords = {{22E20}}, number = {{11}}, pages = {{5007–5021}}, title = {{{Elementary p-adic Lie groups have finite construction rank}}}, doi = {{10.1090/proc/13637}}, volume = {{145}}, year = {{2017}}, } @article{64634, author = {{Glöckner, Helge}}, issn = {{0166-8641}}, journal = {{Topology and its Applications}}, keywords = {{22E65, 22A05, 46A13, 46M40, 58D05}}, pages = {{277–284}}, title = {{{Completeness of locally k_ω-groups and related infinite-dimensional Lie groups}}}, doi = {{10.1016/j.topol.2017.05.007}}, volume = {{228}}, year = {{2017}}, } @inbook{57234, author = {{Meise, Bianca and Schloots, Franziska Margarete and Müller-Lietzkow, Jörg and Meister, Dorothee M.}}, booktitle = {{Interdisziplinäre Perspektiven zur Zukunft der Wertschöpfung}}, isbn = {{9783658202644}}, publisher = {{Springer Fachmedien Wiesbaden}}, title = {{{Interdisziplinäres Projektmanagement – Strategische Handlungsempfehlungen für Kooperationsverbünde in akademischen Kontexten}}}, doi = {{10.1007/978-3-658-20265-1_18}}, year = {{2017}}, } @inproceedings{24219, abstract = {{In this paper we present theoretical, simulated and measured data for a reader to tag communication RFID system at 5.8 GHz. First a theoretical link budget analysis for a reader to tag architecture is shown for a wireless industrial application at 1m distance. This includes a power budget of the passively powered transponder. The received power level of the backscattered data for the theoretical link budget is -52:5 dBm. For the first setup slot antennas are developed and measured in the anechoic chamber. The measured gain is 4.0 dB. The power of the backscatter data in setup 1 is -74:8 dBm. This corresponds to the theoretical link budget since, all losses such as cable or lower antenna gain are taken into account. Setup 2 is upgraded on the reader side with horn antennas. At 5.8 GHz, the gain reaches the value of 10.8 dB. The second setup shows improvement in the receiving backscattered power to a value of -62:4 dBm. Furthermore, as a solution to detect those transponders not presented in the main slope of the antenna, a steerable beam is introduced by means of a Rotman lens. On the topic of the passive transponder, different harvesting topologies at 5.8 GHz are investigated, and the efficiency simulation of the harvesting circuitry has been performed. The simulated efficiency of the implemented technique is 68 %.}}, author = {{Kuhn, Peter and Haddadian, Sanaz and Meyer, Frederic and Hoffmann, Marc and Grabmaier, Anton and Scheytt, Christoph and Kaiser, Thomas}}, booktitle = {{Smart SysTech 2017; European Conference on Smart Objects, Systems and Technologies}}, isbn = {{978-3-8007-4428-2}}, publisher = {{VDE ITG}}, title = {{{SHF RFID System for Automatic Process Optimization with Intelligent Tools}}}, year = {{2017}}, } @inproceedings{24222, abstract = {{This paper focuses on the design of a high efficiency cross-connected differential drive rectifier for next-generation passive RFID tags. To provide a realistic estimation of the transponders’power and efficiency requirements at 5.8 GHz, detailed link/power-budget analysis for various blocks of the tag chip is carried out. From link budget analysis realistic RF power levels are obtained and a rectifier with high conversion efficiency at low power levels is designed. Simulations based on a commercial 65nm CMOS technology investigate the suitability of the harvesting circuit for 5.8 GHz RFID tags.}}, author = {{Haddadian, Sanaz and Scheytt, Christoph and Kramer, Roland}}, booktitle = {{ANALOG 2017; 16th ITG/GMM-Symposium}}, pages = {{18}}, publisher = {{Technische Universität Berlin}}, title = {{{Energy Harvesting Analysis for Next Generation Passive RFID Tags}}}, year = {{2017}}, } @inproceedings{58667, abstract = {{In this work, an innovative approach for the design and structuring of teaching videos systematically using 3D animations is presented. The approach focuses on the quantitative description of electromagnetic fields and the mathematical methods and competencies required for this purpose, exemplarily with regard to an undergraduate electrical engineering course during the initial phase of corresponding degree programs. An essential part of this course is the spatial and time-dependent description of electromagnetic fields. For this purpose, students have to work with multiple integrals in 3D space and in different coordinate systems. Such subjects are typically covered only later in mathematics courses and without a technical context, therefore leading to major difficulties for many students. The videos presented in this work are intended to support students and lecturers to work with these subjects in an instructive fashion. The 3D animations allow for effectively clarifying complex connections between technical and mathematical aspects. The videos and their specific design are discussed with regard to didactic and technical considerations. Additionally, their integration with existing interventions for the course is described.}}, author = {{Hennig, Markus and Mertsching, Bärbel}}, booktitle = {{Proceedings of the 3rd International Conference on Higher Education Advances (HEAd’17)}}, publisher = {{Universitat Politècnica València}}, title = {{{Innovative 3D Animations for Teaching Electromagnetic Field Theory and its Mathematics in Undergraduate Engineering}}}, doi = {{10.4995/head17.2017.5327}}, year = {{2017}}, } @inproceedings{25069, author = {{Adelt, Peer and Koppelmann, Bastian and Müller, Wolfgang and Kleinjohann, Bernd and Scheytt, J. Christoph}}, booktitle = {{Design Automation and Testing in Europe (DATE)}}, location = {{Lausanne, CH, Mrz. 2017}}, title = {{{ANALISA - A Tool for Static Instruction Set Analysis}}}, year = {{2017}}, } @article{33563, author = {{Rezat, Sara and Rezat, Sebastian}}, journal = {{EURASIA Journal of Mathematics, Science & Technology Education 13 (7b)}}, pages = {{4157--4188}}, title = {{{Subject specific genres and genre awareness in integrated mathematics and language teaching}}}, year = {{2017}}, } @article{60399, abstract = {{A variety of techniques were proposed to model smooth surfaces based on tensor product splines (e.g. subdivision surfaces, free-form splines, T-splines). Conversion of an input surface into such a representation is commonly achieved by constructing a global seamless parametrization, possibly aligned to a guiding cross-field (e.g. of principal curvature directions), and using this parametrization as domain to construct the spline-based surface. One major fundamental difficulty in designing robust algorithms for this task is the fact that for common types, e.g. subdivision surfaces (requiring a conforming domain mesh) or T-spline surfaces (requiring a globally consistent knot interval assignment) reliably obtaining a suitable parametrization that has the same topological structure as the guiding field poses a major challenge. Even worse, not all fields do admit suitable parametrizations, and no concise conditions are known as to which fields do. We present a class of surface constructions (T-splines with halfedge knots ) and a class of parametrizations ( seamless similarity maps ) that are, in a sense, a perfect match for the task: for any given guiding field structure, a compatible parametrization of this kind exists and a smooth piecewise rational surface with exactly the same structure as the input field can be constructed from it. As a byproduct, this enables full control over extraordinary points. The construction is backward compatible with classical NURBS. We present efficient algorithms for building discrete conformal similarity maps and associated T-meshes and T-spline surfaces. }}, author = {{Campen, Marcel and Zorin, Denis}}, issn = {{0730-0301}}, journal = {{ACM Transactions on Graphics}}, number = {{4}}, pages = {{1--16}}, publisher = {{Association for Computing Machinery (ACM)}}, title = {{{Similarity maps and field-guided T-splines}}}, doi = {{10.1145/3072959.3073647}}, volume = {{36}}, year = {{2017}}, } @article{60398, abstract = {{AbstractThe efficient and practical representation and processing of geometrically or topologically complex shapes often demands a partitioning into simpler patches. Possibilities range from unstructured arrangements of arbitrarily shaped patches on the one end, to highly structured conforming networks of all‐quadrilateral patches on the other end of the spectrum. Due to its regularity, this latter extreme of conforming partitions with quadrilateral patches, called quad layouts, is most beneficial in many application scenarios, for instance enabling the use of tensor‐product representations based on splines or Bézier patches, grid‐based multi‐resolution techniques and discrete pixel‐based map representations. However, this type of partition is also most complicated to create due to the strict inherent structural restrictions. Traditionally often performed manually in a tedious and demanding process, research in computer graphics and geometry processing has led to a number of computer‐assisted, semi‐automatic, as well as fully automatic approaches to address this problem more efficiently. This survey provides a detailed discussion of this range of methods, treats their strengths and weaknesses and outlines open problems in this field of research.}}, author = {{Campen, Marcel}}, issn = {{0167-7055}}, journal = {{Computer Graphics Forum}}, number = {{8}}, pages = {{567--588}}, publisher = {{Wiley}}, title = {{{Partitioning Surfaces Into Quadrilateral Patches: A Survey}}}, doi = {{10.1111/cgf.13153}}, volume = {{36}}, year = {{2017}}, } @unpublished{60406, abstract = {{An algorithm for the computation of global discrete conformal parametrizations with prescribed global holonomy signatures for triangle meshes was recently described in [Campen and Zorin 2017]. In this paper we provide a detailed analysis of convergence and correctness of this algorithm. We generalize and extend ideas of [Springborn et al. 2008] to show a connection of the algorithm to Newton's algorithm applied to solving the system of constraints on angles in the parametric domain, and demonstrate that this system can be obtained as a gradient of a convex energy.}}, author = {{Campen, Marcel and Zorin, Denis}}, booktitle = {{arXiv:1705.02422}}, title = {{{On Discrete Conformal Seamless Similarity Maps}}}, year = {{2017}}, } @article{60397, author = {{Campen, Marcel}}, issn = {{0272-1716}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{3}}, pages = {{88--95}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Tiling the Bunny: Quad Layouts for Efficient 3D Geometry Representation}}}, doi = {{10.1109/mcg.2017.35}}, volume = {{37}}, year = {{2017}}, } @inproceedings{25070, abstract = {{In the Image Processing domain, automated generation of complex Image Processing functionality is highly desirable; e.g., for rapid prototyping. Service composition techniques, in turn, facilitate automated generation of complex functionality based on building blocks in terms of services. For that reason, we aim for transferring the Service Composition paradigm into the Image Processing domain. In this paper, we present our symbolic composition approach that enables us to automatically generate Image Processing applications. Functionality of Image Processing services is described by means of a variant of first-order logic, which grounds on domain knowledge operationalized in terms of ontologies. A Petri-net formalism serves as basis for modeling data-flow of services and composed services. A planning-based composition algorithm automatically composes complex data-flow for a required functionality. A brief evaluation serves as proof of concept.}}, author = {{Jungmann, Alexander and Kleinjohann, Bernd}}, booktitle = {{Proceedings of the 13th IEEE International Conference on Services Computing (SCC)}}, pages = {{106--113}}, publisher = {{IEEE Computer Society}}, title = {{{Automatic Composition of Service-based Image Processing Applications}}}, year = {{2016}}, } @phdthesis{195, author = {{Platenius, Marie Christin}}, publisher = {{Universität Paderborn}}, title = {{{Fuzzy Matching of Comprehensive Service Specifications}}}, year = {{2016}}, } @techreport{198, author = {{Jazayeri, Bahar and Platenius, Marie Christin and Engels, Gregor and Kundisch, Dennis}}, publisher = {{Universität Paderborn}}, title = {{{Features of IT Service Markets: A Systematic Literature Review (Supplementary Material)}}}, year = {{2016}}, }