@inproceedings{26405,
  author       = {{Schubert, Philipp and Sattler, Florian and Schiebel, Fabian Benedikt and Hermann, Ben and Bodden, Eric}},
  booktitle    = {{2021 IEEE 21st International Working Conference on Source Code Analysis and Manipulation (SCAM)}},
  title        = {{{Modeling the Effects of Global Variables in Data-Flow Analysis for C/C++}}},
  year         = {{2021}},
}

@phdthesis{6563,
  abstract     = {{Designprozesse von Schallwandlern werden durch zunehmende Rechenkapazitäten immer mehr durch simulative Betrachtungen unterstützt. Dabei ist vor allem die Wahl der Materialparameter der verwendeten Materialien wichtig für ein realitätsnahes Simulationsergebnis. Bei Schallwandlern werden häufig Piezokeramiken als aktive Elemente genutzt, welche sich durch eine Verkopplung mechanischer und elektrischer Eigenschaften auszeichnen. Zur Bestimmung ihrer Materialparameter stellt der IEEE Standard on Piezoelectricity ein standardisiertes Verfahren dar. Dazu sind fünf Impedanzmessungen an vier unterschiedlich gefertigten Probekörpergeometrien notwendig. Da an jedem einzelnen Probekörper nur eine Untermenge aller notwendigen Materialparameter bestimmt werden kann, werden diese dann zu einem kompletten Materialparametersatz zusammengefügt. Aufgrund der unterschiedlichen Prozessbedingungen, bei denen die jeweiligen Probekörper hergestellt werden, ist dieser Materialparametersatz jedoch inkonsistent und kann nie das Verhalten einer einzelnen Probe beschreiben. Daher wird in der vorliegenden Arbeit ein Messverfahren entwickelt, mit dem es möglich ist, alle relevanten Materialparameter unter besonderer Berücksichtigung von Dämpfung an einem einzelnen Probekörper allein durch Impedanzmessungen zu bestimmen. Als Probekörper wird dazu eine in der Anwendung häufig verwendete Scheibengeometrie verwendet. Um eine hinreichend hohe Sensitivität auf alle Materialparameter zu gewährleisten, wird diese mit einer optimierten Elektrodentopologie gefertigt. Da in diesem Fall keine analytische Betrachtung mehr möglich ist, wird das Messverfahren durch einen inversen Ansatz realisiert.}},
  author       = {{Feldmann, Nadine}},
  pages        = {{184}},
  publisher    = {{Universität Paderborn}},
  title        = {{{	 Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers}}},
  doi          = {{10.17619/UNIPB/1-1264}},
  year         = {{2021}},
}

@article{21341,
  abstract     = {{The progress in numerical methods and simulation tools promotes the use of inverse problems in material characterisation problems. A newly developed procedure can be used to identify the behaviour of piezoceramic discs over a wide frequency range using a single specimen via fitting simulated and measured impedances by optimising the underlying material parameters. Since there is no generally accepted damping model for piezoelectric ceramics, several mechanical damping models are examined for the material identification. Three models have been chosen and their ability to replicate the measured impedances is evaluated. On the one hand, the common Rayleigh model is considered as a reference. On the other hand, a Zener model and a model using complex constants are extended to model the transversely isotropic material. As the Rayleigh model is only valid for a limited frequency range, it fails to model the broadband behaviour of the material. The model using complex constants leads to the best fit over a wide frequency range while at the same time only adding three additional parameters for modelling damping. Thus, damping can be assumed approximately frequency-independent in piezoceramics.}},
  author       = {{Feldmann, Nadine and Schulze, Veronika and Claes, Leander and Jurgelucks, Benjamin and Meihost, Lars and Walther, Andrea and Henning, Bernd}},
  issn         = {{2196-7113}},
  journal      = {{tm - Technisches Messen}},
  number       = {{5}},
  pages        = {{294 -- 302}},
  title        = {{{Modelling damping in piezoceramics: A comparative study}}},
  doi          = {{10.1515/teme-2020-0096}},
  volume       = {{88}},
  year         = {{2021}},
}

@inproceedings{22012,
  author       = {{Claes, Leander and Feldmann, Nadine and Jurgelucks, Benjamin and Schulze, Veronika and Schmidt, Stephan and Walther, Andrea and Henning, Bernd}},
  location     = {{Nürnberg}},
  pages        = {{237--238}},
  title        = {{{Optimised Multi-Electrode Topology for Piezoelectric Material Characterisation}}},
  doi          = {{10.5162/SMSI2021/A10.1}},
  year         = {{2021}},
}

@misc{21233,
  author       = {{Schulze, Veronika and Schmidt, Stephan and Jurgelucks, Benjamin and Feldmann, Nadine and Claes, Leander}},
  title        = {{{Optimal experiment design with respect to electrode configurations for a piezoelectric problem}}},
  year         = {{2021}},
}

@misc{23462,
  author       = {{Schulze, Veronika and Schmidt, Stephan and Jurgelucks, Benjamin and Feldmann, Nadine and Claes, Leander}},
  title        = {{{Piezoelectric BC Modeling for Electrode Shapes with OED}}},
  year         = {{2021}},
}

@misc{48630,
  author       = {{Kruse, Stephan and Scheytt, J. Christoph}},
  title        = {{{System mit optischer Trägerverteilung}}},
  year         = {{2021}},
}

@misc{48629,
  author       = {{Kruse, Stephan and Scheytt, J. Christoph}},
  title        = {{{Elektrooptischer Regelkreis}}},
  year         = {{2021}},
}

@article{58661,
  abstract     = {{Curvature scale-space (CSS) analysis is an important technique for contour-based object recognition in digital images. To compute the CSS for a given contour, it is systematically convolved (smoothed) with Gaussians with increasing standard deviation. The convolutions are computationally expensive, especially for large and high resolution contours, but can be approximated using box filtering (also known as mean and average filtering). Together with running sums, the convolutions can be accelerated by 2–3 magnitudes without significant loss of precision. Nonetheless, box filtering has not been systematically investigated in connection with CSS computation. In this work, we present a theoretical and experimental analysis of different box-filtering techniques in this context and conclude which is the most efficient implementation. Based on this, the CSS of a contour can be computed in real time with high precision.}},
  author       = {{Hennig, Markus and Mertsching, Bärbel}},
  issn         = {{1742-6588}},
  journal      = {{Journal of Physics: Conference Series}},
  number       = {{1}},
  publisher    = {{IOP Publishing}},
  title        = {{{Box Filtering for Real-Time Curvature Scale-Space Computation}}},
  doi          = {{10.1088/1742-6596/1958/1/012020}},
  volume       = {{1958}},
  year         = {{2021}},
}

@article{23991,
  author       = {{Kruse, Stephan and Gudyriev, Sergiy and Kneuper, Pascal and Schwabe, Tobias and Kurz, Heiko G. and Scheytt, Christoph}},
  journal      = {{IEEE Microwave and Wireless Components Letters}},
  number       = {{6}},
  pages        = {{783--786}},
  title        = {{{Silicon Photonic Radar Transmitter IC for mm-Wave Large Aperture MIMO Radar Using Optical Clock Distribution}}},
  doi          = {{10.1109/LMWC.2021.3062112}},
  volume       = {{31}},
  year         = {{2021}},
}

@inproceedings{23995,
  author       = {{Kruse, Stephan and Bahmanian, Meysam and Kneuper, Pascal and Kress, Christian and Kurz, Heiko G. and Schneider, Thomas and Scheytt, Christoph}},
  booktitle    = {{The 17th European Radar Conference}},
  title        = {{{Phase Noise Investigation for a Radar System with Optical Clock Distribution }}},
  doi          = {{10.1109/EuRAD48048.2021.00018}},
  year         = {{2021}},
}

@inproceedings{23996,
  author       = {{Kneuper, Pascal and Kruse, Stephan and Luchterhandt, Bjoern and Tünnermann, Jan and Scharlau, Ingrid and Scheytt, Christoph}},
  booktitle    = {{The 17th European Radar Conference}},
  title        = {{{Sensory Substitution Device for the Visually Impaired Using 122 GHz Radar and Tactile Feedback }}},
  doi          = {{10.1109/EuRAD48048.2021.00034}},
  year         = {{2021}},
}

@article{29201,
  abstract     = {{As a complementary technology to existing Radio Frequency (RF)-based solutions such as Cellular V2X (C-V2X) and Dedicated Short Range Communication (DSRC), Vehicular VLC (V-VLC) is gaining more attention in the research community as well as in the industry. This paper introduces a complete IEEE 802.11 compliant V-VLC system. The system relies on Universal Software Radio Peripheral (USRP) software defined radios programmed using the GNU Radio framework, a typical car headlight plus a custom driver electronics for the high-power car LEDs (sender), and a photodiode (receiver). Building upon our earlier work, we, for the first time, experimentally explore the communication performance in outdoor scenarios, even in broad daylight, and show that rather simple optical modifications help to reduce the ambient noise to enable long distance visible light communication. Our system also supports Orthogonal Frequency-Division Multiplexing (OFDM) with a variety of Modulation and Coding Schemes (MCS) up to 64-QAM and is fully compliant with IEEE 802.11. We performed an extensive series of experiments to explore the performance of our system, even using higher order MCS in daylight. Our results demonstrated a high reliability for distances up to 75m with the presented system, regardless of the time of the day.}},
  author       = {{Amjad, Muhammad Sohaib and Tebruegge, Claas and Memedi, Agon and Kruse, Stephan and Kress, Christian and Scheytt, J. Christoph and Dressler, Falko}},
  journal      = {{IEEE Transactions on Vehicular Technology}},
  number       = {{6}},
  pages        = {{5749--5761}},
  title        = {{{Towards an IEEE 802.11 Compliant System for Outdoor Vehicular Visible Light Communications}}},
  doi          = {{10.1109/TVT.2021.3075301}},
  volume       = {{70}},
  year         = {{2021}},
}

@article{23993,
  author       = {{Bahmanian, Meysam and Scheytt, Christoph}},
  journal      = {{IEEE Transactions on Microwave Theory and Techniques}},
  number       = {{3}},
  pages        = {{1635--1645}},
  title        = {{{A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser}}},
  doi          = {{10.1109/tmtt.2020.3047647}},
  volume       = {{69}},
  year         = {{2021}},
}

@inproceedings{29205,
  abstract     = {{We present the optical generation of a 300 Gbaud PRBS-7 data signal based on time-division multiplexing of Nyquist sinc-pulse sequences. The employed electronic and photonic components need only one-third of the final bandwidth.}},
  author       = {{Singh, Karanveer and Meier, Janosch and Preussler, Stefan and Kress, Christian and Scheytt, J. Christoph and Schneider, Thomas}},
  booktitle    = {{OSA Advanced Photonics Congress 2021}},
  isbn         = {{978-1-943580-94-1}},
  location     = {{Washington, DC United States}},
  pages        = {{SpTu4D.6}},
  publisher    = {{Optical Society of America}},
  title        = {{{Optical PRBS Generation with Threefold Bandwidth of the Employed Electronics and Photonics}}},
  doi          = {{https://doi.org/10.1364/SPPCOM.2021.SpTu4D.6}},
  year         = {{2021}},
}

@article{29202,
  author       = {{De, Souvaraj and Singh, Karanveer and Kress, Christian and Das, Ranjan and Schwabe, Tobias and Preußler, Stefan and Kleine-Ostmann, Thomas and Scheytt, J. Christoph and Schneider, Thomas}},
  journal      = {{IEEE Photonics Technology Letters}},
  number       = {{21}},
  pages        = {{1189--1192}},
  title        = {{{Roll-Off Factor Analysis of Optical Nyquist Pulses Generated by an On-Chip Mach-Zehnder Modulator}}},
  doi          = {{10.1109/LPT.2021.3112485}},
  volume       = {{33}},
  year         = {{2021}},
}

@proceedings{60447,
  editor       = {{Andres, Bjoern and Campen, Marcel and Sedlmair, Michael}},
  isbn         = {{978-3-03868-161-8}},
  publisher    = {{Eurographics Association}},
  title        = {{{26th International Symposium on Vision, Modeling, and Visualization, VMV 2021, Virtual Event / Technische Universität Dresden, Germany, September 27-28, 2021}}},
  year         = {{2021}},
}

@article{60377,
  abstract     = {{<jats:p>We present a guaranteed quality mesh generation algorithm for the curvilinear triangulation of planar domains with piecewise polynomial boundary. The resulting mesh consists of higher-order triangular elements which are not only regular (i.e., with injective geometric map) but respect strict bounds on quality measures like scaled Jacobian and MIPS distortion. This also implies that the curved triangles' inner angles are bounded from above and below. These are key quality criteria, for instance, in the field of finite element analysis. The domain boundary is reproduced exactly, without geometric approximation error. The central idea is to transform the curvilinear meshing problem into a linear meshing problem via a carefully constructed transformation of bounded distortion, enabling us to leverage key results on guaranteed-quality straight-edge triangulation. The transformation is based on a simple yet general construction and observations about convergence properties of curves under subdivision. Our algorithm can handle arbitrary polynomial order, arbitrarily sharp corners, feature and interface curves, and can be executed using rational arithmetic for strict reliability.</jats:p>}},
  author       = {{Mandad, Manish and Campen, Marcel}},
  issn         = {{0730-0301}},
  journal      = {{ACM Transactions on Graphics}},
  number       = {{4}},
  pages        = {{1--14}},
  publisher    = {{Association for Computing Machinery (ACM)}},
  title        = {{{Guaranteed-quality higher-order triangular meshing of 2D domains}}},
  doi          = {{10.1145/3450626.3459673}},
  volume       = {{40}},
  year         = {{2021}},
}

@article{60378,
  abstract     = {{<jats:p>We describe an efficient algorithm to compute a discrete metric with prescribed Gaussian curvature at all interior vertices and prescribed geodesic curvature along the boundary of a mesh. The metric is (discretely) conformally equivalent to the input metric. Its construction is based on theory developed in [Gu et al. 2018b] and [Springborn 2020], relying on results on hyperbolic ideal Delaunay triangulations. Generality is achieved by considering the surface's intrinsic triangulation as a degree of freedom, and particular attention is paid to the proper treatment of surface boundaries. While via a double cover approach the case with boundary can be reduced to the case without boundary quite naturally, the implied symmetry of the setting causes additional challenges related to stable Delaunay-critical configurations that we address explicitly. We furthermore explore the numerical limits of the approach and derive continuous maps from the discrete metrics.</jats:p>}},
  author       = {{Campen, Marcel and Capouellez, Ryan and Shen, Hanxiao and Zhu, Leyi and Panozzo, Daniele and Zorin, Denis}},
  issn         = {{0730-0301}},
  journal      = {{ACM Transactions on Graphics}},
  number       = {{6}},
  pages        = {{1--16}},
  publisher    = {{Association for Computing Machinery (ACM)}},
  title        = {{{Efficient and robust discrete conformal equivalence with boundary}}},
  doi          = {{10.1145/3478513.3480557}},
  volume       = {{40}},
  year         = {{2021}},
}

@article{60376,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>A homeomorphism between two surfaces not only defines a (continuous and bijective) geometric correspondence of points but also (by implication) an identification of topological features, i.e. handles and tunnels, and how the map twists around them. However, in practice, surface maps are often encoded via sparse correspondences or fuzzy representations that merely approximate a homeomorphism and are therefore inherently ambiguous about map topology. In this work, we show a way to infer topological information from an imperfect input map between two shapes. In particular, we compute a homology map, a linear map that transports homology classes of cycles from one surface to the other, subject to a global consistency constraint. Our inference robustly handles imperfect (e.g., partial, sparse, fuzzy, noisy, outlier‐ridden, non‐injective) input maps and is guaranteed to produce homology maps that are compatible with true homeomorphisms between the input shapes. Homology maps inferred by our method can be directly used to transfer homological information between shapes, or serve as foundation for the construction of a proper homeomorphism guided by the input map, e.g., via compatible surface decomposition.</jats:p>}},
  author       = {{Born, Janis and Schmidt, Patrick and Campen, Marcel and Kobbelt, Leif}},
  issn         = {{0167-7055}},
  journal      = {{Computer Graphics Forum}},
  number       = {{5}},
  pages        = {{193--204}},
  publisher    = {{Wiley}},
  title        = {{{Surface Map Homology Inference}}},
  doi          = {{10.1111/cgf.14367}},
  volume       = {{40}},
  year         = {{2021}},
}