@inproceedings{46426,
  abstract     = {{One of the main challenges for next generation automotive radars is the improvement of angular resolution to a sub-degree level. In this context, wide aperture automotive radars of 1m length or more and resolution close to 0.1° in azimuth and 0.5° in elevation could be beneficial. To enable coherent processing of arrays with such large aperture, prior (i.e offline) and online calibration are necessary: channel imbalances (gains and phases) and three dimensional coordinates of transmit and receive elements need to be determined. We propose a calibration strategy based on alternating steps between the two subtasks of i) channel imbalance estimation with ‘known’ array positions, by applying a singular value decomposition to the resulting tensor calculus problem; and ii) antenna position estimation with ’known’ channel imbalances, by numerically maximizing the Bayesian posterior probability; in both cases operating on range/Doppler snapshots of disjoint targets (with potentially unknown locations). Simulation studies based on the parameters of a MIMO 8x6 linear sparse array show promising results as long as the initial position errors do not exceed half a wavelength (2mm), beyond which we observe strong effects of ambiguity. Experimental results with real measurements show that after calibration in laboratory conditions, our MIMO 8x6 demonstrator with 50cm aperture is able to resolve two targets at the same range with angular separation at least as close as 0.4°.}},
  author       = {{Greiff, Christian  and Mateos-Núñez, David and Simoni, Renato and González-Huici, Maria and Kruse, Stephan and Scheytt, J. Christoph and Kolk, Karl and Höller, Christian and Kurz, Heiko Gustav and Meinecke, Marc-Michael and Gisder, Thomas}},
  booktitle    = {{2023 24th International Radar Symposium (IRS)}},
  location     = {{Berlin, Germany}},
  publisher    = {{IEEE}},
  title        = {{{Calibration of Large Coherent MIMO Radar Arrays: Channel Imbalances and 3D Antenna Positions}}},
  doi          = {{10.23919/IRS57608.2023.10172475}},
  year         = {{2023}},
}

@inproceedings{42800,
  abstract     = {{In this paper we present a new system architecture for software-defined radio / radar with optical signal distribution. The proposed architecture allows to transmit the optical carrier and an arbitrary IQ signal on the same fiber from a base station to wireless transmitters using a single laser. Furthermore, we can reuse parts, and under special conditions, also the complete optical output of the base station for the IQ return path from the wireless receiver frontends to the base station. Avoiding multiple lasers and fibers for the distribution of the carrier and arbitrary signal from the base station to the frontend, and avoiding the laser diode for the IQ return path from receiver frontends to the base station reduces the hardware effort significantly. Finally, the system architecture allows to integrate all components of the optoelectronic wireless frontend in a single chip using silicon photonics technology.}},
  author       = {{Kruse, Stephan and Kneuper, Pascal and Schwabe, Tobias and Meinecke, Marc-Michael and Kurz, Heiko G. and Scheytt, J. Christoph}},
  location     = {{Fraunhofer-Forum Berlin, Germany}},
  title        = {{{Distributed System Architecture for Software-Defined Radio / Radar with Optical Signal Distribution}}},
  doi          = {{10.23919/IRS57608.2023.10172470}},
  year         = {{2023}},
}

@inproceedings{47124,
  author       = {{Kruse, Stephan and Meinecke, Marc-Michael and Kneuper, Pascal and Schwabe, Tobias and Kurz, Heiko G. and Scheytt, J. Christoph}},
  booktitle    = {{2023 20th European Radar Conference (EuRAD)}},
  location     = {{Berlin}},
  title        = {{{Analysis and Simulation of a Coherent FMCW Lidar-Photonic Radar Combined Sensor System for Large Aperture Phased Array MIMO}}},
  doi          = {{10.23919/EuRAD58043.2023.10289439}},
  year         = {{2023}},
}

@article{47126,
  author       = {{Kruse, Stephan and Greitens, Jan C. and Schwabe, Tobias and Kneuper, Pascal and Kurz, Heiko G. and Scheytt, J. Christoph}},
  journal      = {{IEEE Microwave and Wireless Technology Letters }},
  title        = {{{A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics}}},
  doi          = {{10.1109/LMWT.2023.3315315}},
  year         = {{2023}},
}

@inproceedings{42804,
  abstract     = {{This paper presents a method to model monolithically integrated photonic radar transceiver (TRX) with optical local oscillator (LO) distribution in silicon germanium (SiGe) electronic photonic integrated circuits (EPICs). The model proposed approximates the behavior of the nonlinear scattering (S)-parameters and noise figure of each building block of the TRX chipset by Laplace polynomials and hyperbolic tangent functions. The modular approach of the model allows to optimize hardware components with respect to the entire TRX system, and fault identification with reduced computational effort.
The proposed method is validated using the first monolithically integrated photonic radar transceiver chipset and shows excellent agreement with the post layout simulation results and, including the photodiode (PD) bandwidth (BW) degradation, also with the measurements.
}},
  author       = {{Kruse, Stephan and Schwabe, Tobias and Kneuper, Pascal and Meinecke, Marc-Michael and Kurz, Heiko G. and Scheytt, J. Christoph}},
  location     = {{Fraunhofer-Forum Berlin, Germany}},
  title        = {{{Nonlinear S-Parameter Behavioral Model of a Photonic Radar Transceiver Chipset for Automotive Applications}}},
  doi          = {{10.23919/IRS57608.2023.10172395}},
  year         = {{2023}},
}

@inproceedings{47064,
  author       = {{Iftekhar, Mohammed and Nagaraju, Harshan and Kneuper, Pascal and Sadiye, Babak and Müller, Wolfgang and Scheytt, J. Christoph}},
  booktitle    = {{BCICTS 2023 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium}},
  location     = {{MONTEREY, CALIFORNIA, USA}},
  title        = {{{A 28-Gb/s 27.2 mW NRZ Full-Rate Bang-Bang Clock and Data Recovery in 22 nm FD-SOI CMOS Technology }}},
  year         = {{2023}},
}

@article{58871,
  author       = {{Pohle, Carina and Paschen, Linda and Baumeister, Jochen}},
  issn         = {{0966-6362}},
  journal      = {{Gait & Posture}},
  pages        = {{72--82}},
  publisher    = {{Elsevier BV}},
  title        = {{{Alterations of postural control across the menstrual cycle – A systematic review}}},
  doi          = {{10.1016/j.gaitpost.2023.09.010}},
  volume       = {{107}},
  year         = {{2023}},
}

@article{48614,
  author       = {{Pohle, Carina and Paschen, Linda and Baumeister, Jochen}},
  issn         = {{0966-6362}},
  journal      = {{Gait & Posture}},
  keywords     = {{Rehabilitation, Orthopedics and Sports Medicine, Biophysics}},
  pages        = {{72--82}},
  publisher    = {{Elsevier BV}},
  title        = {{{Alterations of postural control across the menstrual cycle – A systematic review}}},
  doi          = {{10.1016/j.gaitpost.2023.09.010}},
  volume       = {{107}},
  year         = {{2023}},
}

@article{47451,
  author       = {{Rezat, Sara and Scholle, Oliver}},
  journal      = {{Medien im Deutschunterricht }},
  number       = {{(1)}},
  title        = {{{AnnoPy – Ein digitales Tool zur Förderung von Textkompetenzen.}}},
  doi          = {{https://doi.org/10.18716/ojs/midu/2023.1.5 }},
  volume       = {{5}},
  year         = {{2023}},
}

@article{47452,
  author       = {{Rezat, Sara}},
  journal      = {{Deutsch 5-10}},
  pages        = {{34--35}},
  title        = {{{Mit digitalen Tools Peer-Feedback zu Texten geben.}}},
  volume       = {{74}},
  year         = {{2023}},
}

@inbook{58906,
  author       = {{Pinsch, Jan Christian}},
  booktitle    = {{Katastrophen. Religiöse Bildung angesichts von Kriegs- und Krisenerfahrungen im 19. und 20. Jahrhundert}},
  editor       = {{Janus,  Richard and Kamcili-Yildiz, Naciye and Rose,  Marion and Schroeter-Wittke,  Harald}},
  pages        = {{95--110}},
  title        = {{{Frömmigkeit als Antwort auf Krisen und Katastrophen? Die Erweckungsbewegung im 19. Jahrhundert in Lippe und der Lippische Gemeinschaftsbund}}},
  year         = {{2023}},
}

@article{49610,
  abstract     = {{Dieser Beitrag untersucht, inwiefern sich die kognitive Verankerung von der schriftbildlichen Gestaltung lexikalisch übernommener Markennamen nachweisen lässt. Dazu werden die Ergebnisse eines tachistoskopischen Wahrnehmungstests ausgewertet, bei dem einer Testgruppe die Schriftbilder (Logos) der Markennamen 'FÜR', 'Landliebe', 'MONSTER', 'GUT & GÜNSTIG', 'kinder' und 'ja!' mehrmals für Sekundenbruchteile (0,01s, 0,02s, 0,1s und 1,0s) und teils mit substituiertem Schriftzug präsentiert wurden. Insgesamt deutet die explorative Untersuchung – mit graduellen Abweichungen – in die Richtung, dass die Wahrnehmung des Schriftbilds zum Erkennen des dazugehörigen Markennamens führt. Dies ermöglicht die Schlussfolgerung, dass sich die getesteten Markennamen als multimodale Konstruktionen mit konstitutiver Schriftbildlichkeit qualifizieren.}},
  author       = {{Dübbert, Alexander}},
  issn         = {{0005-8114}},
  journal      = {{Beiträge zur Namenforschung}},
  number       = {{3}},
  pages        = {{315--333}},
  publisher    = {{Winter}},
  title        = {{{Die schriftbildliche Gestaltung von lexikalisch übernommenen Markennamen. Ein explorativer Wahrnehmungstest zum graduellen Entrenchment von Markennamen als multimodale Konstruktionen}}},
  volume       = {{58}},
  year         = {{2023}},
}

@article{45824,
  abstract     = {{<jats:p>As cognitive function is critical for muscle coordination, cognitive training may also improve neuromuscular control strategy and knee function following an anterior cruciate ligament reconstruction (ACLR). The purpose of this case-control study was to examine the effects of cognitive training on joint stiffness regulation in response to negative visual stimuli and knee function following ACLR. A total of 20 ACLR patients and 20 healthy controls received four weeks of online cognitive training. Executive function, joint stiffness in response to emotionally evocative visual stimuli (neutral, fearful, knee injury related), and knee function outcomes before and after the intervention were compared. Both groups improved executive function following the intervention (p = 0.005). The ACLR group had greater mid-range stiffness in response to fearful (p = 0.024) and injury-related pictures (p = 0.017) than neutral contents before the intervention, while no post-intervention stiffness differences were observed among picture types. The ACLR group showed better single-legged hop for distance after cognitive training (p = 0.047), while the healthy group demonstrated no improvement. Cognitive training enhanced executive function, which may reduce joint stiffness dysregulation in response to emotionally arousing images and improve knee function in ACLR patients, presumably by facilitating neural processing necessary for neuromuscular control.</jats:p>}},
  author       = {{An, Yong Woo and Kim, Kyung-Min and DiTrani Lobacz, Andrea and Baumeister, Jochen and Higginson, Jill S. and Rosen, Jeffrey and Swanik, Charles Buz}},
  issn         = {{2227-9032}},
  journal      = {{Healthcare}},
  keywords     = {{Health Information Management, Health Informatics, Health Policy, Leadership and Management}},
  number       = {{13}},
  publisher    = {{MDPI AG}},
  title        = {{{Cognitive Training Improves Joint Stiffness Regulation and Function in ACLR Patients Compared to Healthy Controls}}},
  doi          = {{10.3390/healthcare11131875}},
  volume       = {{11}},
  year         = {{2023}},
}

@book{58994,
  author       = {{Garske, Volker and Bürger, Markus and Hellgermann, Andreas and Jendt, Sebastian}},
  publisher    = {{Schöningh / Westermann}},
  title        = {{{Christliche Ethik: Der Klimawandel. Interpretationen - Unterrichtsmodell}}},
  year         = {{2023}},
}

@misc{59047,
  author       = {{Garske, Volker}},
  publisher    = {{Klett}},
  title        = {{{Kafka trifft Markus: Intertextuelle Erarbeitung einer Szene aus "Heilung des Bartimäus" (Mk 10,46-52)}}},
  year         = {{2023}},
}

@misc{59048,
  author       = {{Garske, Volker}},
  publisher    = {{Klett}},
  title        = {{{"Halt dich an mir fest!" - Der Seewandel Jesu im Spiegel moderner Popmusik }}},
  year         = {{2023}},
}

@inproceedings{50742,
  abstract     = {{The nickel-based alloy Inconel 718, which is used in aerospace technology, poses a great
challenge to conventional machining due to its high strain hardening and toughness. Here, the laser
powder bed fusion process (LPBF) offers an alternative with potential savings if sufficiently high
productivity can be achieved. Based on the parameter study carried out, starting from the SLM
Solutions standard parameters for the manufacturing of components, exposure parameters could be
developed to realize manufacturing with 120 μm and 150 μm layer thickness, with almost the same
geometric accuracy. For this purpose, the process parameters of laser power, focus diameter, hatch
distance and scan speed were varied. The negative defocusing of the laser showed a positive effect
on the density of the parts, realizing densities ≥ 99.94 %, with high dimensional stability and good
mechanical properties. Considering the reduced manufacturing time of up to 61 %, a significant
increase in productivity was achieved.}},
  author       = {{Bödger, Christian and Gnaase, Stefan and Lehnert, Dennis and Tröster, Thomas}},
  booktitle    = {{Proceedings of the 34th Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference}},
  location     = {{Austin}},
  title        = {{{Investigation of the influence of process parameters on productivity in the LPBF process for the material Inconel 718}}},
  year         = {{2023}},
}

@article{37200,
  abstract     = {{<jats:p>(1) This work answers the question of whether and to what extent there is a significant difference in mechanical properties when different additive manufacturing processes are applied to the material 1.2709. The Laser-Powder-Bed-Fusion (L-PBF) and Laser-Metal-Deposition (LMD) processes are considered, as they differ fundamentally in the way a part is manufactured. (2) Known process parameters for low-porosity parts were used to fabricate tensile strength specimens. Half of the specimens were heat-treated, and all specimens were tested for mechanical properties in a quasi-static tensile test. In addition, the material hardness was determined. (3) It was found that, firstly, heat treatment resulted in a sharp increase in mechanical properties such as hardness, elastic modulus, yield strength and ultimate strength. In addition to the increase in these properties, the elongation at break also decreases significantly after heat treatment. The choice of process, on the other hand, does not give either process a clear advantage in terms of mechanical properties but shows that it is necessary to consider the essential mechanical properties for a desired application.</jats:p>}},
  author       = {{Gnaase, Stefan and Niggemeyer, Dennis and Lehnert, Dennis and Bödger, Christian and Tröster, Thomas}},
  issn         = {{2073-4352}},
  journal      = {{Crystals}},
  keywords     = {{Inorganic Chemistry, Condensed Matter Physics, General Materials Science, General Chemical Engineering}},
  number       = {{2}},
  publisher    = {{MDPI AG}},
  title        = {{{Comparative Study of the Influence of Heat Treatment and Additive Manufacturing Process (LMD &amp; L-PBF) on the Mechanical Properties of Specimens Manufactured from 1.2709}}},
  doi          = {{10.3390/cryst13020157}},
  volume       = {{13}},
  year         = {{2023}},
}

@inproceedings{47487,
  author       = {{Kepper, Johannes and Münzmay, Andreas}},
  booktitle    = {{DHd2023: Open Humanities, Open Culture}},
  title        = {{{Open Data in musikphilologischen Projekten: Herausforderungen, Strategien, Potenziale}}},
  doi          = {{10.5281/ZENODO.7715387}},
  year         = {{2023}},
}

@inproceedings{47034,
  author       = {{Wickemeyer, Carolin and Güldenpenning, Iris and Weigelt, Matthias}},
  booktitle    = {{Abstracts of the 55th Autumn Meeting of Experimental Cognitive Psychology (HExKoP) }},
  editor       = {{Bogenschütz, L. and Fenske, P. and Ayatollahi, S. and Hamzeloo, M. and Montoya, G. A. L. and Viegas, L. and Baess, P. and Hackländer, R.}},
  location     = {{Hildesheim}},
  pages        = {{23}},
  title        = {{{Influence of response complexity on response inhibition for the basketball pump fake}}},
  year         = {{2023}},
}