@article{63798,
  author       = {{Vernholz, Mats and Temmen, Katrin}},
  issn         = {{2199-8825}},
  journal      = {{die hochschullehre}},
  number       = {{8}},
  pages        = {{97--111}},
  publisher    = {{wbv Publikation}},
  title        = {{{Motive Ingenieurstudierender für den Besuch (fach-)didaktischer Lehrveranstaltungen im Projekt EduTech Net OWL}}},
  doi          = {{10.3278/HSL2608W}},
  volume       = {{12}},
  year         = {{2026}},
}

@article{63800,
  abstract     = {{In this contribution, we address the estimation of the frequency-dependent elastic parameters of polymers in the ultrasound range, which is formulated as an inverse problem. This inverse problem is implemented as a nonlinear regression-type optimization problem, in which the simulation signals are fitted to the measurement signals. These signals consist of displacement responses in waveguides, focusing on hollow cylindrical geometries to enhance the simulation efficiency. To accelerate the optimization and reduce the number of model evaluations and wait times, we propose two novel methods. First, we introduce an adaptation of the Levenberg–Marquardt method derived from a geometrical interpretation of the least-squares optimization problem. Second, we introduce an improved objective function based on the autocorrelated envelopes of the measurement and simulation signals. Given that this study primarily relies on simulation data to quantify optimization convergence, we aggregate the expected ranges of realistic material parameters and derive their distributions to ensure the reproducibility of optimizations with proper measurements. We demonstrate the effectiveness of our objective function modification and step adaptation for various materials with isotropic material symmetry by comparing them with the Broyden–Fletcher–Goldfarb–Shanno method. In all cases, our method reduces the total number of model evaluations, thereby shortening the time to identify the material parameters.}},
  author       = {{Itner, Dominik and Dreiling, Dmitrij and Gravenkamp, Hauke and Henning, Bernd and Birk, Carolin}},
  issn         = {{0888-3270}},
  journal      = {{Mechanical Systems and Signal Processing}},
  keywords     = {{Material parameter estimation, Waveguide, Nonlinear optimization, Inverse problem, Least squares}},
  pages        = {{113904}},
  title        = {{{A modified Levenberg–Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses}}},
  doi          = {{https://doi.org/10.1016/j.ymssp.2026.113904}},
  volume       = {{247}},
  year         = {{2026}},
}

@article{63827,
  abstract     = {{Light-emitting diodes (LEDs) are becoming increasingly important across various sectors of the lighting industry and are being used more frequently. In the field of symbolic projection, research is increasingly focusing on implementing light modulation using energy-efficient, incoherent LEDs rather than lasers. Since light modulation in micro- and nano-optics is typically achieved through phase modulation, Finite-Difference Time-Domain (FDTD) simulations are employed for analysis. The objective of this article is to investigate different approaches for approximating incoherent monochromatic light sources within FDTD simulations. To this end, two approaches based on dipole sources are considered, as well as a method involving plane waves with modulated wavefronts based on Cosine–Fourier functions and a method based on the superposition of Gaussian beams. These methods are evaluated in terms of their accuracy using a two-dimensional double-slit configuration and are compared against a fully incoherent analytical reference.}},
  author       = {{Metzner, Dominik and Potthoff, Jens and Zentgraf, Thomas and Förstner, Jens}},
  issn         = {{2304-6732}},
  journal      = {{Photonics}},
  keywords     = {{tet_topic_opticalantenna, tet_topic_numerics, tet_topic_meta}},
  number       = {{2}},
  publisher    = {{MDPI AG}},
  title        = {{{Approximating Incoherent Monochromatic Light Sources in FDTD Simulations}}},
  doi          = {{10.3390/photonics13020128}},
  volume       = {{13}},
  year         = {{2026}},
}

@article{63838,
  abstract     = {{Industrial electrification is increasing to reduce fossil fuel dependence, alongside a growing share of volatile renewables.
A secure and reliable energy supply is crucial for industry, leading to a shift from centralised to decentralised grid structures.
DC microgrids becoming increasingly popular in industry, since they enable energy recuperation from braking, reduce components and cables, and integrate storage and local generation to manage supply interruptions or peak loads.
EVs add further synergies by serving as mobile storage units, helping to store and redistribute locally generated renewable energy.
This paper analyses how EV integration in droop-controlled DC grids can contribute to a more stable, low-emission and peak-reduced load profile to the supply grid through load shifting and bridge interruptions.
A droop-controlled DC grid model has been developed, incorporating an EV charging park based on probability functions.
Scalable scenarios allow for diverse condition analysis using an energy management system that utilises fuzzy logic and sequential MILP optimisation.
It has been shown that a 7% improvement of coefficient represented grid-serving behaviour is possible by load shifting.
It has also been demonstrated that an optimised EMS can reduce the demand-based CO2 emissions by 41kg for a representative day compared to a fuzzy logic EMS.
At the same time peak load is decreased yielding a more constant residual load.
These results highlight the potential of a controlled bidirectional charging infrastructure in DC grids and underscore the need to explicitly consider charging processes to ensure a residual load as constant as possible.}},
  author       = {{Rahlf, Henning Christoph and Knorr, Lukas and Althoff, Simon and Meschede, Henning}},
  issn         = {{2666-9552}},
  journal      = {{Smart Energy}},
  keywords     = {{DC-grid, Droop control, Grid-serving behaviour, Grid stability, Bidirectional charging, Sequential decision, MILP optimisation}},
  publisher    = {{Elsevier BV}},
  title        = {{{Analysis of bidirectional EV charging infrastructures within industrial DC grids}}},
  doi          = {{10.1016/j.segy.2026.100227}},
  year         = {{2026}},
}

@inbook{63793,
  author       = {{Vernholz, Mats and Schäfers, Johannes and Jonas-Ahrend, Gabriela and Temmen, Katrin}},
  booktitle    = {{Smart Technologies for an All-Electric Society. STE 2025. Lecture Notes in Networks and Systems}},
  editor       = {{Auer, Michael E. and Langmann, Reinhard and May, Dominik and Morales, Manuel}},
  isbn         = {{9783032073150}},
  issn         = {{2367-3370}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Shaping Tomorrow’s Classrooms: Integrating AI in Technology Teacher Training and VET in Germany}}},
  doi          = {{10.1007/978-3-032-07316-7_10}},
  year         = {{2026}},
}

@inproceedings{64838,
  author       = {{Jafarzadeh, Hanieh and Reimer, Jan Dennis and Amrouch, Hussam and Hellebrand, Sybille and Wunderlich, Hans-Joachim}},
  booktitle    = {{To appear in: 27th IEEE Latin American Test Symposium (LATS2026), March 2026}},
  title        = {{{Validating Statistical Delay Test Generation under Timing Variations via SAT-Based ATPG}}},
  year         = {{2026}},
}

@misc{64839,
  author       = {{Jafarzadeh, Hanieh and Reimer, Jan Dennis and Amrouch, Hussam and Hellebrand, Sybille and Wunderlich, Hans-Joachim}},
  title        = {{{SAT-Based Validation of Statistical Delay Test Generation under Timing Variations}}},
  year         = {{2026}},
}

@article{63435,
  author       = {{Claes, Leander and Winkler, Michael}},
  issn         = {{1468-1218}},
  journal      = {{Nonlinear Analysis: Real World Applications}},
  pages        = {{104580}},
  publisher    = {{Elsevier BV}},
  title        = {{{Describing smooth small-data solutions to a quasilinear hyperbolic-parabolic system by W 1,P energy analysis}}},
  doi          = {{10.1016/j.nonrwa.2025.104580}},
  volume       = {{91}},
  year         = {{2026}},
}

@article{63532,
  abstract     = {{Room-temperature lasing is a key milestone in the development of miniaturized optoelectronic and photonic devices. We present a simple approach to synthesize phase-pure quasi-2D layered tin perovskite nanowires with varying quantum well thicknesses (n = 1 to 4). By incorporating a new organic spacer capable of forming a hydrogen-bonded organic framework, this method promoted anisotropic crystal growth and enhanced lattice rigidity. Furthermore, introducing molecular intercalants enabled controlled crystallization into well-defined nanowires that function as Fabry–Pérot cavities. Cavities made from n = 2 to 4 perovskites support efficient and robust near-infrared, room-temperature optically pumped lasing with the threshold as low as 75.8 μJ/cm2, cavity quality factor over 3000, and negligible degradation over 106 pulses. A cleaved coupled nanolaser was fabricated as a proof-of-concept device for photonic applications.}},
  author       = {{Kim, Jeong Hui and Simon, Jeffrey and Shao, Wenhao and Nian, Zhichen and Yang, Hanjun and Chen, Peigang and Triplett, Brandon and Li, Zhixu and Wu, Pengfei and Chen, Yuheng and Farheen, Henna and Pagadala, Karthik and Choi, Kyu Ri and Fruhling, Colton B. and Förstner, Jens and Boltasseva, Alexandra and Savoie, Brett M. and Shalaev, Vladimir M. and Dou, Letian}},
  issn         = {{0002-7863}},
  journal      = {{Journal of the American Chemical Society}},
  keywords     = {{tet_topic_opticalantenna}},
  pages        = {{jacs.5c14431}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing}}},
  doi          = {{10.1021/jacs.5c14431}},
  year         = {{2026}},
}

@article{64877,
  author       = {{Taheri, Behnood and Kopylov, Denis and Hammer, Manfred and Meier, Torsten and Förstner, Jens and Sharapova, Polina R.}},
  journal      = {{arXiv}},
  title        = {{{Gain-induced spectral non-degeneracy in type-II parametric down-conversion}}},
  doi          = {{10.48550/ARXIV.2603.01656}},
  year         = {{2026}},
}

@article{65099,
  author       = {{Weber, Daniel and Schmies, Dominik and Lange, Jarren H. and Schenke, Maximilian and Wallscheid, Oliver}},
  issn         = {{2169-3536}},
  journal      = {{IEEE Access}},
  pages        = {{38517--38535}},
  publisher    = {{Institute of Electrical and Electronics Engineers (IEEE)}},
  title        = {{{Optimal Control of Voltage-Forming Grid Inverters by Model Predictive Control and Reinforcement Learning}}},
  doi          = {{10.1109/access.2026.3670948}},
  volume       = {{14}},
  year         = {{2026}},
}

@article{65098,
  author       = {{Weber, Daniel and Lange, Jarren and Wallscheid, Oliver}},
  issn         = {{2687-9735}},
  journal      = {{IEEE Journal of Emerging and Selected Topics in Industrial Electronics}},
  pages        = {{1--12}},
  publisher    = {{Institute of Electrical and Electronics Engineers (IEEE)}},
  title        = {{{Reinforcement Learning-Based Control of Voltage-Forming Grid Inverters With Arbitrary Loads}}},
  doi          = {{10.1109/jestie.2026.3654784}},
  year         = {{2026}},
}

@article{65242,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>With the growing demand for lightweight solutions to reduce emissions, especially in the transportation, automotive and aerospace sectors, recyclable, continuous fiber-reinforced plastic composite laminates with a thermoplastic matrix are of rising interest. To achieve their maximum mechanical properties, the fiber-matrix adhesion (FMA) is critical. In this work, continuous fiber-reinforced thermoplastic laminates (CFRTPL) with a polypropylene (PP) matrix and twill woven glass fiber fabrics are produced by film stacking. The films used contain different amounts of maleic-anhydride-grafted PP (MA-g-PP) as a coupling agent to produce CFRTPL of different mechanical strengths. To analyze the FMA, the CFRTPL are subjected to Charpy-impact and tensile tests. Additionally, single fiber pull-out tests (SFPT) are conducted to further investigate the effect of MA-g-PP on the FMA. The results of the SFPT show an improvement in apparent interfacial shear strength (AIFSS) when the MA-g-PP content is increased, which can be attributed to an increase in FMA. However, the research shows that MA-g-PP has a low impact on the mechanical properties if the force is applied parallel to the warp and weft threads during tensile testing and the results of the Charpy-impact testing suffer from embrittlement of the matrix material. Subsequently, the results of this study are compared to three-point flexural tests conducted in a previous study. It can be concluded that tensile and impact tests are not suited to investigate FMA on a macroscopic scale, while SFPT and flexural tests provide a better alternative.</jats:p>}},
  author       = {{Moritzer, Elmar and Brandes, Philipp and Wittler, Maurice and Claes, Leander and Wippermann, Mareen and Haag, Markus and Gries, Thomas and Henning, Bernd}},
  issn         = {{0930-777X}},
  journal      = {{International Polymer Processing}},
  publisher    = {{Walter de Gruyter GmbH}},
  title        = {{{Fiber-matrix adhesion in glass fiber reinforced thermoplastic composite laminates and its effect on mechanical properties}}},
  doi          = {{10.1515/ipp-2025-0077}},
  year         = {{2026}},
}

@article{65253,
  author       = {{Abdelwanis, Ali Hassan Ali and Haucke-Korber, Barnabas and Jakobeit, Darius and Kirchgässner, Wilhelm and Meyer, Marvin and Schenke, Maximilian and Vater, Hendrik and Wallscheid, Oliver and Weber, Daniel}},
  issn         = {{2577-3569}},
  journal      = {{Journal of Open Source Education}},
  number       = {{97}},
  publisher    = {{The Open Journal}},
  title        = {{{Reinforcement Learning: A Comprehensive Open-Source Course}}},
  doi          = {{10.21105/jose.00306}},
  volume       = {{9}},
  year         = {{2026}},
}

@techreport{65426,
  abstract     = {{In diesem Forschungsprojekt wurde ein Messverfahren zur Bestimmung akustischer Materialparameter von Polymeren im Ultraschallfrequenzbereich entwickelt. Das Verfahrens sollte, die üblichen standardisierten Prüfmethoden erweitern, die bislang primär im quasistatischen oder niederfrequenten Bereich eingesetzt wurden. Im Gegensatz zu bestehenden Verfahren wie dem Zeitstandversuch oder der Dynamisch Mechanischen Analyse (DMA) nach [DIN6721] sollte die neue Methode eine nicht-invasive Charakterisierung der (visko-)elastischen Materialparameter im Frequenzbereich von 0,75 MHz bis 2,5 MHz ermöglichen. Das entwickelte Ultraschallmesssystem arbeitet nach dem Puls Echo-Prinzip und kann eine räumlich segmentierte, ringförmige Anregung erzeugen. Die Bestimmung der frequenzabhängigen Materialparameter geschieht hierbei über ein inverses Verfahren. Die Ergebnisse des Projekts zeigen, dass die Segmentierung der Anregung, die Geometrie der Probe sowie das Puls-Echo-Messprinzip die Messergebnisse sowie die Sensitivität gegenüber Scherparametern wesentlich beeinflussen. Im Rahmen des Projektes wurde auch eine statistische Auswertung des Optimierungsverfahrens hinsichtlich transversal-isotroper Materialsymmetrie mit Rayleigh-Dämpfung durchgeführt. Die Ergebnisse zeigen, dass das entwickelte Verfahren gute Konvergenzeigenschaften aufweist und sich durch verbesserte Robustheit auszeichnet.}},
  author       = {{Dreiling, Dmitrij and Itner, Dominik and Birk, Carolin and Gravenkamp, Hauke and Henning, Bernd}},
  keywords     = {{Materialcharakterisierung, Polymer, Inverses Problem, Ultraschall, Optimierung}},
  pages        = {{12}},
  publisher    = {{Hannover : Technische Informationsbibliothek}},
  title        = {{{Vollständige Bestimmung der akustischen Materialparameter von Polymeren II}}},
  doi          = {{https://doi.org/10.34657/33602}},
  year         = {{2026}},
}

@inbook{65515,
  abstract     = {{Abstract This study explores the usability and onboarding process of a Mixed Reality (MR) application called PEARL, designed to prepare students for laboratory work. Originally developed for mobile Augmented Reality (mAR), PEARL was adapted for MR to offer a more immersive and intuitive experience through hand and gesture controls. Since many students lack experience with MR devices, a user-friendly onboarding system is essential. The study aims to redesign PEARL’s user interface and onboarding experience, evaluating how intuitive interaction elements impact usability. First, a literature review will identify existing usability guidelines for MR applications, which will guide the redesign of the interface. This new version will then be tested with students through a user study. Feedback will be collected via an online survey to assess the onboarding and user experience, and the findings will be used to refine the design further. The expected outcome is an improved onboarding process and interface, making PEARL accessible even for MR novices, enhancing their ability to interact with 3D objects in a real-world setting. Ultimately, the study aims to provide best practices for developing intuitive MR interfaces and effective onboarding experiences, especially in educational contexts.}},
  author       = {{Alptekin, Mesut and Münstermann, Daniel and Temmen, Katrin}},
  booktitle    = {{Lecture Notes in Networks and Systems}},
  isbn         = {{9783032073181}},
  issn         = {{2367-3370}},
  keywords     = {{Meta Quest 3, Augmented Reality, Mixed Reality, PEARL, Electrical Engineering, Laboratory Training, Onboarding, User Experience, User Interface, Heuristics}},
  location     = {{Santiago, Chile}},
  pages        = {{199--211}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Designing and Evaluating the Usability and Onboarding for a Mixed-Reality Application: A Case Study with PEARL (Paderborn Electrical Engineering AR Laboratory) and Meta Quest 3}}},
  doi          = {{10.1007/978-3-032-07319-8_19}},
  volume       = {{2}},
  year         = {{2026}},
}

@inbook{65521,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>We present recent progress made towards ultra-broadband photonically assisted analog-to-digital converters, that leverage both the low jitter of best-of-class mode-locked lasers as well as the capability of optics to break down broadband signals into multiple lower speed tributaries that can be better handled by electronics. We review in particular our work on both time- and frequency-domain approaches and give an outlook on how these architectures can be extended to include further signal processing tasks such as equalization. Optically triggered track-and-hold amplifiers are reported with an equivalent jitter below 80 fs rms in a signal frequency range from 20 GHz to 70 GHz. Frequency-domain architectures implementing optical arbitrary waveform measurement up to signal bandwidths of 610 GHz are also shown. Finally, an architecture allowing the deserialization and equalization of PAM4 signals is introduced and modeled for operation in 400 Gb/s links.</jats:p>}},
  author       = {{Witzens, Jeremy and Drayss, Daniel and Fang, Dengyang and Moscoso Mártir, Alvaro and Müller, Juliana and Weizel, Maxim and Zazzi, Andrea and Freude, Wolfgang and Koos, Christian and Randel, Sebastian and Scheytt, J. Christoph}},
  booktitle    = {{Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}},
  editor       = {{Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}},
  isbn         = {{9783032083395}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters}}},
  doi          = {{10.1007/978-3-032-08340-1_3}},
  year         = {{2026}},
}

@inbook{65518,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>Optically assisted digital-to-analog converters (DACs) using Nyquist pulse sequences (NPSs) are presented and investigated. Therefore, NPSs are mathematically described and analyzed. Based on this, the operating principle of a precise optical Nyquist pulse synthesizer digital-to-analog converter (PONyDAC) is described. Possible architectures of PONyDAC are derived and compared in terms of performance and practicability. Moreover, the limits of PONyDAC systems and their superiority over classical electronic DACs are discussed. Furthermore, discrete building-block based implementations and monolithic implementations in electronic-photonic integrated circuits (EPICs) are presented. To enable a practicable monolithic integration, a shrinkage of the Mach-Zehnder modulators (MZMs) has been performed by applying forward-biased phase shifters (FB-PSs). These FB-PSs are analyzed and modeled to allow the precise and reliable design of PONyDAC systems with multiple MZMs. Finally, data conversion and data transmission experiments are carried out to demonstrate the systems functionality, quantify its performance, and prove their superiority over purely electronic DACs.</jats:p>}},
  author       = {{Scheytt, J. Christoph and Schwabe, Tobias and Singh, Karanveer and Kress, Christian and Schneider, Thomas}},
  booktitle    = {{Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}},
  editor       = {{Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}},
  isbn         = {{9783032083395}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter}}},
  doi          = {{10.1007/978-3-032-08340-1_4}},
  year         = {{2026}},
}

@book{65256,
  editor       = {{Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}},
  isbn         = {{9783032083395}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}}},
  doi          = {{10.1007/978-3-032-08340-1}},
  year         = {{2026}},
}

@inproceedings{58227,
  author       = {{Brockmeier, Jan and Kruse, Stephan and Scheytt, J. Christoph}},
  booktitle    = {{German Microwave Conference 2025}},
  location     = {{Dresden}},
  title        = {{{A Mach-Zehnder-Modulator based FMCW Lidar Emulator in C-Band}}},
  year         = {{2025}},
}