@phdthesis{Paric, author = {Paric, Ivan}, title = {Erfassung und in situ Aussteuerung der rheologischen Eigenschaften von SVB}, address = {Bochum}, doi = {10.13154/294-10463}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:294-104639}, pages = {XIII, 137}, abstract = {Diese Arbeit diskutiert den Einsatz eines neuen rheologischen Messsystems. Die rheologischen Untersuchungen finden unmittelbar nach der Herstellung im Mischer statt. Mischungen verschiedener SVB-Rezepturen wurden mit variierenden w/z-Werten hergestellt. Die einzelnen rheologischen Messergebnisse liefern aneinandergereiht Kennlinien. Solche Kennlinien erlauben die zahlenm{\"a}ßige Definition einer angestrebten Konsistenz. Zus{\"a}tzlich wurden Kennlinien mit Fließmitteln und Stabilisierern generiert. Diese Kennlinien bilden eine Art Wissensdatenbank f{\"u}r die untersuchte Rezeptur. Ein neu entwickelter Algorithmus kann die rheologischen Messwerte einer aktuellen Mischung mit der jeweiligen Wissensdatenbank vergleichen. Bei Abweichungen von der angestrebten Konsistenz berechnet das Aussteuerungssystem die Art und Menge einer zus{\"a}tzlich erforderlichen Komponente. Versuchsserien an SVBs mit abweichender Konsistenz belegen die erfolgreichen Aussteuerungen mit Wasser oder Zusatzmittel.}, subject = {Selbstverdichtender Beton}, language = {de} } @article{KrausKnipferJacobetal., author = {Kraus, Richard and Knipfer, Maximilian and Jacob, Matthias and Kienninger, Baerbel and Alikhani, Jasmine and Ghamsary, Parham Heydarzadeh and Reinker, Lukas and Adler, Ina and Dendorfer, Sebastian and Kieninger, Martin}, title = {Effectiveness and safety of techniques for cervical spine immobilization in mountain rescue}, series = {Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine}, volume = {34}, journal = {Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine}, publisher = {Springer}, doi = {10.1186/s13049-025-01530-z}, pages = {10}, abstract = {Background Cervical spine injuries in alpine sports require immediate immobilization at the site of the accident to avoid possible secondary damage caused by transportation. Using special sensor technology, this study investigated whether a cervical spine orthosis (cervical collar, Stifneck collar (Laerdal Medical GmbH, Puchheim, Germany)) provides greater stability than a vacuum mattress alone. Methods Using one male test person, we simulated transporting a patient with a spinal injury in steep alpine terrain. A wireless motion capture system (Xsens Technologies, Movella™ Inc., Henderson, USA) was used to record motion in three-dimensional space within a standardized environment. All tests were performed on a set course by the Bavarian Mountain Rescue Service. The test person lay on a mountain rescue stretcher and was immobilized with a vacuum mattress, either with or without a cervical orthosis. The axes of cervical spine movements were analyzed separately. Results There were no significant differences between immobilization with and without a cervical orthosis with regard to lateral flexion (max. 3.7° compared to 3.0°) in the frontal plane and maximum excursion in flexion (max. 1.6° compared to 2.8°) or extension (max. -1.6° compared to -1.7°). There was significantly greater rotation movement around the craniocaudal axis without an orthosis (max. 2.4° compared to 1.3°). Conclusion During mountain rescues, the cervical spine can be immobilized without a rigid cervical spine orthosis. Future research should explore the fundamental benefits of cervical spine immobilization, while the findings of this work contribute to the safe care of patients by avoiding the disadvantages associated with rigid cervical orthoses.}, language = {en} } @misc{MichelKrenkel, author = {Michel, Johanna and Krenkel, Lars}, title = {Experimental Investigation of Shear-Induced Generation of Respiratory Aerosol: Simultaneous Measurements of Particle Quantities and Wave Topology}, series = {2nd European Fluid Dynamics Conference (EFDC2), 26-29 August 2025, Dublin, Ireland}, journal = {2nd European Fluid Dynamics Conference (EFDC2), 26-29 August 2025, Dublin, Ireland}, doi = {10.35096/othr/pub-8859}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-88593}, pages = {1}, abstract = {Despite the high level of attention on infectious respiratory aerosol during the Covid19 pandemic, little is known about the processes how these particles form inside the respiratory system. Understanding the underlying fluid mechanical processes and their influencing factors would enable the development of drugs to suppress the generation of infectious aerosol. In the proposed work, we focus on the shear-induced mechanism of aerosol generation, which is supposed to occur mostly in the larger airways during coughing. In this process, high air velocities trigger Kelvin-Helmholtz waves in the mucus film, which lines the air vessels. Through a series of instabilities, particles detach from the crest of these waves. In the proposed work, we investigate the process of shear-induced aerosol generation in idealized experiments where we vary the air-flow characteristics and the properties of the mucus fluid. Our central aim here is to deduct an empirical model of the quantity and size distribution of generated particles depending on the mucus rheology and the local shear flow. Further, we observe the wave topology to better understand the coupling between the air flow and the waves. In our experimental setup, we measure the quantity of created particles and the emerging waves simultaneously. To ensure controllable conditions, we simplify the complex flow conditions in the airways. We use a rectangular channel with the bottom wall covered in a mucus mimetic. The mucus mimetic fluid is a synthetic hydrogel developed to recreate the viscoelastic properties and low surface tensions of the mucus. Filtered pressurized air is guided through the channel to trigger shear-induced aerosol generation. After passing the mucus mimetic, the air enters into a collection chamber from where particles are sampled continuously by an aerosol spectrometer. To measure wave topology, we use planar laser induced fluorescence. For this, we stain the mucus mimetic with fluorescent dyes and illuminate a line on the surface of the fluid film with a 532 nm laser. A high-resolution camera captures the resulting fluorescent glow of the mucus mimetic. Figure 1 presents exemplary wave topology results from the experiments, employing varying air flow volume rates, mucus mimetic gel properties, and different configurations of the laser and camera. The resulting wave topologies exhibit significant variation. For the conference, we will conduct parameter studies of the particle quantities and wave topology while varying the mucus mimetic properties and the flow rate of the air. Additionally, we will present grid projection-based techniques to extend the single-line wave measurements and asses the entire surface of the mucus film.}, language = {en} } @inproceedings{GalkaStrassburgerLangetal., author = {Galka, Stefan and Strassburger, Steffen and Lang, Sebastian and Reggelin, Tobias}, title = {Introduction to the Minitrack on Simulation Modeling and Digital Twins for Decision Making in the Age of Industry 4.0}, series = {Proceedings of the 57th Hawaii International Conference on System Sciences (HICSS), January3-6, 2024, Honolulu, Hawaii}, booktitle = {Proceedings of the 57th Hawaii International Conference on System Sciences (HICSS), January3-6, 2024, Honolulu, Hawaii}, editor = {Bui, Tung}, publisher = {ScholarSpace}, isbn = {978-0-9981331-7-1}, doi = {10.24251/HICSS.2024.206}, pages = {1647 -- 1648}, abstract = {The minitrack contains contributions with a focus on simulation modeling and digital twins and decision making in the context of Industry 4.0. The use of simulation models and digital twins is manifold, from planning to virtual commission and real-time operational decision support. Cyber-physical systems integrate the real world and the virtual world to enable decision making in the age of Industry 4.0. For example, customer decisions and supply disruptions which directly influence manufacturing and logistics systems require immediate decisions. Thus, models must have the capability to support decision making in manufacturing as well as in internal and external logistics in real-time. Methods include discrete-event simulation, discrete-rate simulation, hybrid simulation, system dynamics simulation, the combination of simulation modeling with machine learning or optimization heuristics, prescriptive analytics, and adaptive systems. Furthermore, this minitrack addresses simulation education and simulation models used for education and training in manufacturing and logistics.}, language = {en} } @inproceedings{BockSchwarzWeiss, author = {Bock, Sebastian and Schwarz, Philipp and Weiß, Martin G.}, title = {U-Shape Phenomenon with Gaussian Noise and Clipped Inputs}, series = {Proceedings of Eighth International Congress on Information and Communication Technology. - (ICICT 2023, London, Volume 3)}, booktitle = {Proceedings of Eighth International Congress on Information and Communication Technology. - (ICICT 2023, London, Volume 3)}, editor = {Yang, Xin-She}, publisher = {Springer}, address = {Singapore}, isbn = {978-981-99-3042-5}, doi = {10.1007/978-981-99-3043-2_45}, pages = {569 -- 579}, abstract = {Object detection and recognition is a core task in machine vision. Both the position and the rotation of the objects are of interest. Common algorithms for object recognition based on neural networks use a regression formulation and are aimed at changing environments. In industrial applications, the setting is different: One would like to determine with high accuracy, the pose of known objects. We are investigating a prototype application in this field, where we identify the rotation of an object in a plane. We use common network architectures and provide an overview of how well they are suited for this purpose. In addition, we compare our results with standard image processing algorithms, paying particular attention to the accuracy with metrics relevant in the industry. Moreover, an U-shape phenomenon with disturbed data occurred during the experiments, which is partially explained analytically.}, language = {en} } @article{Zellner, author = {Zellner, Gregor}, title = {Ein Grundriss der Wissenschaftsdisziplin Wirtschaftsinformatik}, series = {BIT Banking and Information Technology}, volume = {Band 25, M{\"a}rz 2024}, journal = {BIT Banking and Information Technology}, number = {1}, pages = {9}, abstract = {Dieser Beitrag gibt einen Grundriss der Wissenschaftsdisziplin Wirtschaftsinformatik (WI) und ihrer Entwicklung. Hierzu wird zun{\"a}chst der Gegenstand der WI n{\"a}her betrachtet, n{\"a}mlich die Informationssysteme. Dann wird erl{\"a}utert, welche Ziele die WI verfolgt. Da WI ein interdisziplin{\"a}res Fach ist, werden anschließend die bestimmenden Basiswissenschaften der WI im Rahmen des Grundsystems der Wissenschaften dargestellt. Dabei wird deutlich, dass der Einfluss unterschiedlicher Disziplinen den Methodenpluralismus in der WI bef{\"o}rdert. Im Beitrag werden die zwei grundlegenden Forschungsparadigmen in Form des verhaltensorientierten und des gestaltungsorientierten Ansatzes n{\"a}her betrachtet. Nach einem kurzen Einblick in die zeitliche Entwicklung der deutschsprachigen WI werden die Themen-und T{\"a}tigkeitsfelder der WI n{\"a}her er{\"o}rtert. Abschließend wird ein Ausblick auf die Herausforderungen in der WI gegeben.}, language = {de} } @article{OrtnerKoekten, author = {Ortner, Martina and K{\"o}kten, Rabia}, title = {Rechtsextremismus transnational betrachtet : das Forschungsprojekt zur {\"U}lk{\"u}c{\"u}-Bewegung in Bayern stellt sich vor}, series = {RadiX - Zeitschrift f{\"u}r Radikalisierungsforschung und Pr{\"a}vention}, volume = {1}, journal = {RadiX - Zeitschrift f{\"u}r Radikalisierungsforschung und Pr{\"a}vention}, number = {2}, publisher = {Verlag Barbara Budrich}, issn = {2944-1382}, doi = {10.3224/radix.vXiX.409890}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-84211}, pages = {21}, abstract = {Deutschland ist eine postmigrantische Gesellschaft. Die damit einhergehende Pluralit{\"a}t beschr{\"a}nkt sich nicht nur auf Herk{\"u}nfte und Biografien, sondern spiegelt sich auch in Lebensentw{\"u}rfen und politischen Einstellungen wider, die nicht nur demokratisch, sondern menschenverachtend-v{\"o}lkisch und antidemokratisch sein k{\"o}nnen. Im Projekt ReTra geht es darum, mehr {\"u}ber Strukturen, Akteur:innen und Aktivit{\"a}ten von t{\"u}rkischen extrem rechten Organisationen in Bayern zu erfahren. Dabei wird der Einfluss von politischen Ver{\"a}nderungen in der T{\"u}rkei miteinbezogen. Das Projekt leistet einen Beitrag zur Rechtsextremismusforschung unter Ber{\"u}cksichtigung sich aufspannender transnationaler sozialer R{\"a}ume. Die qualitative Studie wird erg{\"a}nzt durch einen partizipativen Forschungsansatz, in dem zivilgesellschaftlich Aktive als Co-Forschende einbezogen werden. Fortlaufend wird die Fachdiskussion mit einschl{\"a}gigen Wissenschaftler:innen gef{\"u}hrt. So entsteht ein Netzwerk, durch das ein kontinuierlicher Forschungs-Praxis Austausch erm{\"o}glicht wird. Durch eine Handreichung leistet das Projekt einen Beitrag f{\"u}r die zivilgesellschaftliche Praxis und dar{\"u}ber hinaus f{\"u}r ein demokratisches Miteinander.}, language = {de} } @article{ZellnerPaul, author = {Zellner, Gregor and Paul, Dennis}, title = {Ein strukturierter Vergleich ausgew{\"a}hlter Process Mining Tools}, series = {BIT Banking and Information Technology}, volume = {Band 24, Oktober 2023}, journal = {BIT Banking and Information Technology}, number = {2}, pages = {12}, abstract = {Die Notwendigkeit zur Optimierung und Automatisierung von Ablaufen in Unternehmen nimmt mit zunehmender Digitalisierung an Fahrt auf. Zur Unterst{\"u}tzung dieses Trends haben sich in den letzten Jahren einige Tools im Themenbereich Process Mining entwickelt und etabliert. Ziel dieser Untersuchung ist es, systematisch ausgew{\"a}hlte Tools anhand eines vorhandenen, aber weiterentwickelten Kriterienkatalogs zu vergleichen und damit dem Anwender eine strukturierte Einsicht in den aktuellen Markt der Process Mining Tools zu geben. Aus einer Auswahl von 44 Tools werden acht Tools genauer untersucht. Die letztendliche Auswahl h{\"a}ngt von vielen unternehmensindividuellen Faktoren ab, so dass kein pauschaler Vorschlag f{\"u}r das geeignetste Tool gegeben werden kann.}, language = {de} } @phdthesis{Eigenberger, author = {Eigenberger, Andreas}, title = {Die Auswirkungen der mechanischen Kr{\"a}fte eines innovativen Operationsverfahrens f{\"u}r die intraoperative Gewebezubereitung bei autologem Fetttransfer auf das Fettgewebe und dessen Stammzellen}, address = {Regensburg}, pages = {235 Bl{\"a}tter}, language = {de} } @article{EmpacherKampsSchmiedt, author = {Empacher, Christina and Kamps, Udo and Schmiedt, Anja Bettina}, title = {Prediction intervals for future Pareto record claims}, series = {European Actuarial Journal}, volume = {15}, journal = {European Actuarial Journal}, number = {1}, publisher = {Springer}, issn = {2190-9733}, doi = {10.1007/s13385-024-00397-1}, pages = {163 -- 197}, abstract = {Stochastic models and methods for quantifying extreme events are of interest in numerous disciplines. Within this paper, statistical prediction of extreme claims or losses in insurance industry is considered based on upper record values, which describe successively largest observations in a sequence of data over time. The problem of predicting a future record value (here in particular, a future record claim) based on a sequence of previously observed record values (here, past record claims) is addressed by means of prediction intervals. For an underlying Pareto distribution, respective exact and approximate intervals from the literature are summarized and modified and new ones are developed. In a simulation study, these prediction intervals are evaluated and compared regarding coverage frequency and length. The impact of the number of observed record values as well as the choice of the Pareto distribution is discussed. In the case of a small number of record values, the use of k-th record values is considered as an option for statistical analyses to predict, e.g., second largest record claims. Selected prediction methods are applied to several real data sets, which turn out to perform well and to be able to capture the magnitude of future record claims, even for fairly small numbers of record observations. For comparison, generalized Pareto distributions are fitted to real data sets and a corresponding point predictor as well as a respective upper prediction interval for the next record to appear are derived and evaluated.}, language = {en} } @techreport{SchuheggerGalka, author = {Schuhegger, Lukas and Galka, Stefan}, title = {Herausforderungen von produzierenden Startups}, doi = {10.35096/othr/pub-8852}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-88520}, pages = {30}, abstract = {Startups bringen mit ihrer Dynamik und neuen innovativen Gesch{\"a}ftsmodellen frischen Wind in die deutsche Unternehmenslandschaft. Die disruptiven Ans{\"a}tze gestalten die Zukunft und damit geraten sie immer weiter in den Fokus, unter anderem auch f{\"u}r Investoren. Das Ziel der Studie ist es, Zusammenh{\"a}nge zwischen Herausforderungen und Eigenschaften von produzierenden Startups darzulegen. Dieses Wissen soll an andere Startups weitergegeben werden, um die Erfolgschancen in der Gr{\"u}nderszene zu erh{\"o}hen. Im Juli 2021 wurde hierzu eine Umfrage entworfen, um die Erfahrungen von Gr{\"u}ndern und Startup-Mitarbeitern zu sammeln und die spezifischen Herausforderungen besser zu verstehen.}, subject = {Unternehmensgr{\"u}ndung}, language = {de} } @misc{RueckertRauberKlausmannetal., author = {Rueckert, Tobias and Rauber, David and Klausmann, Leonard and Gutbrod, Max and Rueckert, Daniel and Feussner, Hubertus and Wilhelm, Dirk and Palm, Christoph}, title = {PhaKIR Dataset - Surgical Procedure Phase, Keypoint, and Instrument Recognition [Data set]}, doi = {10.5281/zenodo.15740620}, abstract = {Note: A script for extracting the individual frames from the video files while preserving the challenge-compliant directory structure and frame-to-mask naming conventions is available on GitHub and can be accessed here: https://github.com/remic-othr/PhaKIR_Dataset. The dataset is described in the following publications: Rueckert, Tobias et al.: Comparative validation of surgical phase recognition, instrument keypoint estimation, and instrument instance segmentation in endoscopy: Results of the PhaKIR 2024 challenge. arXiv preprint, https://arxiv.org/abs/2507.16559. 2025. Rueckert, Tobias et al.: Video Dataset for Surgical Phase, Keypoint, and Instrument Recognition in Laparoscopic Surgery (PhaKIR). arXiv preprint, https://arxiv.org/abs/2511.06549. 2025. The proposed dataset was used as the training dataset in the PhaKIR challenge (https://phakir.re-mic.de/) as part of EndoVis-2024 at MICCAI 2024 and consists of eight real-world videos of human cholecystectomies ranging from 23 to 60 minutes in duration. The procedures were performed by experienced physicians, and the videos were recorded in three hospitals. In addition to existing datasets, our annotations provide pixel-wise instance segmentation masks of surgical instruments for a total of 19 categories, coordinates of relevant instrument keypoints (instrument tip(s), shaft-tip transition, shaft), both at an interval of one frame per second, and specifications regarding the intervention phases for a total of eight different phase categories for each individual frame in one dataset and thus comprehensively cover instrument localization and the context of the operation. Furthermore, the provision of the complete video sequences offers the opportunity to include the temporal information regarding the respective tasks and thus further optimize the resulting methods and outcomes.}, language = {en} } @misc{HauerSchultzHaugetal., author = {Hauer, Franziska and Schultz, Maximilian and Haug, Sonja and Weber, Karsten}, title = {K{\"u}nstliche Intelligenz in Nichtregierungsorganisationen - quantitativer Datensatz [Data set]}, doi = {10.5281/zenodo.17977270}, abstract = {K{\"u}nstliche Intelligenz (KI) stellt ein wichtiges Thema der Digitalisierung dar und hat das Potenzial viele Arbeitsfelder grundlegend zu ver{\"a}ndern. Mit dem Einsatz von KI wird die Hoffnung verbunden durch Automatisierung Zeit und Geld zu sparen. Dies k{\"o}nnte besonders interessant f{\"u}r Organisationen sein, die wenig Ressourcen zur Verf{\"u}gung haben, da sie nicht gewinnorientiert oder ehrenamtlich arbeiten. Dazu z{\"a}hlen Nichtregierungsorganisationen (NRO), die einen wichtigen Bestandteil der Zivilgesellschaft darstellen. Aufgrund der komplexer werdenden Arbeit von NROs scheint KI M{\"o}glichkeiten zur Bew{\"a}ltigung aktueller und zuk{\"u}nftiger Herausforderungen zu bieten. {\"U}ber den Einsatz von KI in NROs ist derzeit jedoch wenig bekannt. Es wurde eine quantitative Querschnittstudie deutscher Nichtregierungsorganisationen (NRO) zum Thema KI durchgef{\"u}hrt. Der Web-Survey baut auf den Erkenntnissen des Scoping Reviews und der qualitativen Interviews auf und vertieft den Einblick in die Bereiche aktuelle Nutzung von KI, Wissenstand in den Organisationen sowie vorhandene und noch ben{\"o}tigte Ressourcen. Daf{\"u}r wurden 343 NROs verschiedener Gr{\"o}ßen und Handlungsfelder befragt und die Ergebnisse quantitativ analysiert.}, language = {de} } @misc{HaugCurrleWeber, author = {Haug, Sonja and Currle, Edda and Weber, Karsten}, title = {K{\"u}nstliche Intelligenz und Anamnese (KI-Anamnese) - Datens{\"a}tze Welle 1 und Welle 2 [Data set]}, doi = {10.5281/zenodo.18017447}, abstract = {Die Studie st{\"u}tzt sich auf eine Quotenstichprobe der deutschsprachigen Bev{\"o}lkerung im Alter von 18 bis 74 Jahren. Sie wurde als L{\"a}ngsschnittstudie (Trendstudie) mit insgesamt zwei Wellen mit dem gleichen Fragebogen durchgef{\"u}hrt. Welle 1 war vom 18. bis 24. November 2024 im Feld, die zweite Befragungswelle vom 13. bis 17. November 2025. Mit der Datenerhebung wurde das Umfrageinstitut NielsenIQ-GfK beauftragt. Je 1.000 Personen wurden online im Rahmen des GfK eBUS®-Deutschland befragt. Die Teilnehmenden wurden mithilfe einer Kombination aus Online- und Offline-Methoden rekrutiert. Um eine m{\"o}glichst genaue Abbildung der Grundgesamtheit zu gew{\"a}hrleisten, wurden die Merkmale Geschlecht, Alter, Region, Haushaltsgr{\"o}ße, Ortsgr{\"o}ße sowie der Bildungsstand des Haushaltsvorstands quotiert, etwaige Abweichungen durch ein iteratives Gewichtungsverfahren ausgeglichen. Der Fragebogen besteht aus neun standardisierten Fragen; zuz{\"u}glich wurden soziodemographische Merkmale erhoben. Einzelne Fragen wurden, zum Teil {\"u}bersetzt sowie abgewandelt, aus anderen Studien {\"u}bernommen.}, language = {de} } @misc{GutbrodRauberWeberNunesetal., author = {Gutbrod, Max and Rauber, David and Weber Nunes, Danilo and Palm, Christoph}, title = {A cleaned subset of the first five CATARACTS test videos [Data set]}, doi = {10.5281/zenodo.14924735}, abstract = {This dataset is a subset of the original CATARACTS test dataset and is used by the OpenMIBOOD framework to evaluate a specific out-of-distribution setting. When using this dataset, it is mandatory to cite the corresponding publication (OpenMIBOOD (10.1109/CVPR52734.2025.02410)) and follow the acknowledgement and citation requirements of the original dataset (CATARACTS). The original CATARACTS dataset (associated publication,Homepage) consists of 50 videos of cataract surgeries, split into 25 train and 25 test videos. This subset contains the frames of the first 5 test videos. Further, black frames at the beginning of each video were removed.}, language = {en} } @inproceedings{HammerMottokKrauseetal., author = {Hammer, Pascal and Mottok, J{\"u}rgen and Krause, Veronika and Probst, Tobias}, title = {Approach for High-Performance Random Number Generators for Critical Systems}, series = {Proceeding of the 12th European Congress on Embedded Real Time Software and Systems (ERTS2024) , Toulouse, 11-12 June 2024}, booktitle = {Proceeding of the 12th European Congress on Embedded Real Time Software and Systems (ERTS2024) , Toulouse, 11-12 June 2024}, doi = {10.5281/zenodo.14848832}, pages = {9}, abstract = {In times of digitalization, the encryption and signing of sensitive data is becoming increasingly important. These cryptographic processes require large quantities of high-quality random numbers. Which is why a high-performance random number generator (RNG) is to be developed. For this purpose, existing concepts of RNGs and application standards are first analyzed. The proposed approach is to design a physical true random number generator (PTRNG) with a high output of random numbers. Based on this, the development begins with the analog part of the RNG, the noise signal source and a suitable amplifier for the analog noise signal. Therefore, a special noise diode from Noisecom and an amplifier from NXP were chosen and analyzed in different measurements. From the results of the measurements, it can be concluded that both components are suitable for use in the RNG.}, language = {en} } @misc{HaugVetterDotteretal., author = {Haug, Sonja and Vetter, Miriam and Dotter, Caroline and Weber, Karsten}, title = {Forschungsprojekt "EVEKT "Erh{\"o}hung der Verbraucherpartizipation an der Energiewende und datenbasierte Mehrwertdienste" — Datensatz [Data set]}, doi = {10.5281/zenodo.17962728}, abstract = {Um Leistungsschwankungen im Stromnetz durch fluktuierende erneuerbare Energien auszugleichen, sollen in Deutschland intelligente Messtechnologien in Privathaushalten verbaut werden. Diese gelten als zentraler Bestandteil sog. Smart-Grids (intelligente Stromnetze), die Stromnachfrage und -angebot steuern, um Stromnetzstabilit{\"a}t zu gew{\"a}hrleisten. Die Werte, die bei der Messung des Stromverbrauchs in Privathaushalten erhoben werden, k{\"o}nnen an die Verbraucher*innen mithilfe von Apps oder anderer Smart-Meter-Plattformen (datenbasierte Mehrwertdienste) r{\"u}ckgemeldet werden. Vor diesem Hintergrund wurde 2023 eine Online-Befragung der Wohnbev{\"o}lkerung in Deutschland durchgef{\"u}hrt (n=2.027). Untersucht wurden Bekanntheit, Nutzungsbereitschaft und Akzeptanz intelligenter Stromz{\"a}hler bzw. Smart-Meter sowie die Nutzungsintention bei Anwendungsszenarien und Datenschutzbedenken.}, language = {de} } @unpublished{FeessWeiss, author = {Feeß, Alexander and Weiß, Martin}, title = {Analysis of a Cuspidal 6R Robot}, address = {Regensburg}, doi = {10.35096/othr/pub-8862}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-88626}, pages = {8}, abstract = {We present a theoretical and numerical analysis of the kinematics for the Transpressor, a cuspidal 6R robot. It admits up to 16 inverse kinematics solutions which are described geometrically. For special target poses, we provide the solutions analytically and present a simple numerical solver for the general case. Moreover, an analytical estimate of the Jacobian determinant on a path between two solutions proves cuspidality for a class of robots similar to the transpressor.}, subject = {Kinematik}, language = {en} } @unpublished{FeessWeiss, author = {Feeß, Alexander and Weiß, Martin}, title = {Uniqueness Domains of Offset Wrist Robots via a 4D Workspace Representation}, address = {Regensburg}, doi = {10.35096/othr/pub-8863}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-88635}, pages = {9}, abstract = {We present a new method for studying the workspace of 6R robots using a four-dimensional representation. This is applied to numerically determine connected workspace components with a constant number of solutions of the inverse kinematics, and to describe critical values that form the boundaries these regions. To define and maximize uniqueness domains, nonsingular transition of these boundaries are investigated. This provides a method to determine workspace regions in which the robot can move avoiding configuration changes and singularities.}, language = {en} } @phdthesis{Thumann, author = {Thumann, Maria}, title = {Anpassung der Verarbeitungseigenschaften von Frischbetonmischungen f{\"u}r die Entwicklung von Spritzbetonen mit reduziertem Versinterungspotential}, address = {Regensburg}, pages = {XIV, 179}, abstract = {In nicht druckwasserhaltenden Tunnelbauwerken wird das Bergwasser {\"u}ber Entw{\"a}sserungs� systeme gesammelt und aus dem Bauwerk geleitet. Versinterungen der Drainageleitungen des sekund{\"a}ren Entw{\"a}sserungssystems f{\"u}hren zu Querschnittsverminderungen und -verschl{\"u}ssen, wodurch die gezielte Ableitung des Bergwassers aus dem Bauwerk gest{\"o}rt wird. Zur Vermeidung von Sch{\"a}den am Tunnelbauwerk oder von Wassereintritten in den Tunnel, aufgrund eines Anstiegs des Bergwasserdrucks hinter der Innenschale, sind regelm{\"a}ßige Reinigungsarbeiten erforderlich. Die Reinigung der Drainageleitungen ist h{\"a}ufig sehr kosten� intensiv und f{\"u}hrt zu Verkehrsbehinderungen in den Tunneln. Die Entstehung von Versinterungen wird durch die chemisch-physikalische Zusammensetzung des Bergwassers, die Umgebungsbedingungen im Bereich des Tunnels, die Ausf{\"u}hrung des Entw{\"a}sserungssystems und den Kontakt des Bergwassers mit zementgebundenen Materialien, z. B. dem Spritzbeton, beeinflusst. Ein Ansatz, um die Entstehung von Versinterungen zu reduzieren, ist die Optimierung der Spritzbetonrezeptur. Die {\"A}nderung der Rezeptur� zusammensetzung beeinflusst aber auch die Verarbeitbarkeit der Frischbetonmischung, die Fr{\"u}hfestigkeitsentwicklung des jungen Spritzbetons und die Festigkeitsentwicklung des Spritzbetons. Die Versuchsergebnisse von Auslaugversuchen mit M{\"o}rtel-, Spritzm{\"o}rtel- und Spritzbeton� proben im Rahmen dieser Arbeit belegen, dass das Versinterungspotential durch eine Reduzierung des Klinkergehalts im Bindemittel, den Einsatz von puzzolanischen oder latent� hydraulischen Zusatzstoffen und eine geringe Porosit{\"a}t reduziert wird. Die {\"A}nderungen der Bindemittelzusammensetzung des Spritzbetons haben Auswirkungen auf den Klinkergehalt, den Wasserbedarf und den Leimgehalt und damit auch auf die Verarbeitbarkeit der Frischbetonmischung. F{\"u}r die Beurteilung der Verarbeitbarkeit, v. a. der Pumpbarkeit, von Frischbetonen und Frischbetonmischungen wurden Konsistenzpr{\"u}fverfahren, rheologische Pr{\"u}fverfahren und Pr{\"u}fverfahren zur Beurteilung der Stabilit{\"a}t ausgew{\"a}hlt. Ihre Eignung und Aussagekraft wurde bei Pumpversuchen mit einer mobilen Spritzbetonmaschine verifiziert. F{\"u}r die Pumpbarkeit von Frischbetonmischungen ist zum einen ein ausreichendes Leimvolumen zur Ausbildung einer Gleitschicht an der Rohrwandung erforderlich und zum anderen m{\"u}ssen die Mischungen unter Druck ausreichend stabil bleiben, damit w{\"a}hrend des Pumpens keine Blockaden in den F{\"o}rderleitungen auftreten. Sofern diese Aspekte bei den entwickelten Rezepturen erf{\"u}llt sind, ist eine ausreichende Verarbeitbarkeit der Frischbetonmischungen erreicht. Dar{\"u}ber hinaus konnten die Anforderungen an die Fr{\"u}hfestigkeitsentwicklung und die 28 d Druckfestigkeit der Spritzbetone mit optimierten Mischungen erf{\"u}llt werden. Im Rahmen dieser Arbeit wurde gezeigt, welche Aspekte bei der Entwicklung von Spritzbetonen mit einem reduzierten Versinterungspotential ber{\"u}cksichtigt werden m{\"u}ssen, um auch die genannten baupraktischen Anforderungen zu erf{\"u}llen.}, language = {de} } @misc{Grabinger, author = {Grabinger, Lisa}, title = {Data of a systematic literature research on eye tracking in software engineering [Data set]}, doi = {10.5281/zenodo.11279180}, abstract = {How did the data collection work? By systematic research in the IEEE Xplore and ACM digital libraries we extracted 125 papers. Further details on the procedure can be found in the journal paper. What data is provided? In this repository you can find the extracted data, i.e., file data.xlsx.}, language = {en} } @misc{GlavanBelyaevaShamoninChamonine, author = {Glavan, Gašper and Belyaeva, Inna A. and Shamonin (Chamonine), Mikhail}, title = {Transient Response of Macroscopic Deformation of Magnetoactive Elastomeric Cylinders in Uniform Magnetic Fields [Data set]}, doi = {10.5281/zenodo.10679499}, language = {en} } @misc{GlavanBelyaevaShamoninChamonineetal., author = {Glavan, Gašper and Belyaeva, Inna A. and Shamonin (Chamonine), Mikhail and Ruwisch, Kevin and Wollschl{\"a}ger, Joachim}, title = {Magnetoelectric Response of Laminated Cantilevers Comprising a Magnetoactive Elastomer and a Piezoelectric Polymer, in Pulsed Uniform Magnetic Fields [Data set]}, doi = {10.5281/zenodo.14652152}, language = {en} } @incollection{DeutelMallahWissingetal., author = {Deutel, Mark and Mallah, Maen and Wissing, Julio and Scheele, Stephan}, title = {Recent Trends in Edge AI: Efficient Design, Training and Deployment of Machine Learning Models}, series = {Charting the Intelligence Frontiers - Edge AI Systems Nexus}, booktitle = {Charting the Intelligence Frontiers - Edge AI Systems Nexus}, editor = {Vermesan, Ovidiu and Pagani, Alain and Meloni, Paolo}, publisher = {River Publishers}, address = {New York}, isbn = {9788743808862}, doi = {10.1201/9788743808862-9}, pages = {181 -- 220}, abstract = {With a rising demand for ubiquitous smart systems, processing and interpreting large quantities of data generated on the edge at a high velocity is becoming an increasingly important challenge. Machine learning (ML) models such as Deep Neural Networks (DNNs) are an essential tool of today's artificial intelligence due to their ability to make accurate predictions given complex tasks and environments. However, Deep Learning is computationally complex and energy intensive. This seems to contradict the characteristics of many edge devices, which have only limited memory, computational resources, and energy budget available. To overcome this challenge, an efficient ML model design is crucial that incorporates available optimization techniques from hardware, software, and methodological perspective to enable energy-efficient deployment and operation on the edge. This work comprehensively summarizes recent techniques for training, optimizing, and deploying ML models targeting edge devices. We discuss different strategies for finding deployable ML models, scalable DNN architectures, neural architecture search, and multi-objective optimization approaches, to enable feasible trade-offs considering available resources and latency. Furthermore, we give insight into DNN compression methods such 182as quantization and pruning. We conclude by investigating different forms of cascaded processing, from simple multi-level approaches to highly branched compute graphs and early-exit DNNs.}, language = {en} } @article{KuettnerFischerLaumer, author = {Kuettner, Andreas and Fischer, Samuel and Laumer, Tobias}, title = {Mechanical and structural characterization of heat-staked parts realized by selective laser sintering of polyamide 12}, series = {The International Journal of Advanced Manufacturing Technology}, journal = {The International Journal of Advanced Manufacturing Technology}, publisher = {Springer}, doi = {10.1007/s00170-025-17319-4}, pages = {20}, abstract = {Heat staking is a joining process in which thermoplastic pins are formed by heat and pressure in a form-fitting and insoluble way. This study evaluates the mechanical performance and microstructure of selective laser sintered (SLS) polyamide 12 (PA 12) components before and after heat staking, compared with conventionally turned reference specimens. The components were characterized using tensile tests, micrographs, microscopy, and micro-CT measurements. For the tests, the forces and temperatures during heat staking were varied to determine the best process parameters. Tensile tests revealed that SLS joints achieved strengths of up to 33.6 MPa, approaching the 39.9 MPa of the turned references. Microstructural analysis showed a marked reduction in porosity due to heat staking. Porosity decreased from 3.9\% to 1.56\% at a staking force of 300 N and from 4.29\% to 0.81\% at 1000 N, highlighting the beneficial effect of increased force. These results demonstrate that heat staking parameters significantly influence local densification and mechanical performance, and that, under suitable conditions, SLS components can achieve joint strengths comparable to conventionally manufactured parts. The study shows that the heat staking process parameters have a significant influence on the local microstructure and thus on the mechanical performance and provides a basis for optimizing SLS components for new heat staking applications.}, language = {en} } @article{Zuerner, author = {Z{\"u}rner, Christian}, title = {Von der „{\"A}sthetischen" zur „Kulturellen Bildung" - (heimlicher) Verlust eines kritischen Selbstverst{\"a}ndnisses}, series = {P{\"a}dagogische Rundschau}, volume = {69}, journal = {P{\"a}dagogische Rundschau}, number = {1}, publisher = {Lang}, pages = {75 -- 89}, language = {de} } @misc{Kriegl2022, author = {Kriegl, Raphael}, title = {Microstructured Magnetoactive Elastomers for Switchable Wettability [Data set]}, doi = {10.5281/zenodo.13124555}, year = {2022}, language = {en} } @misc{GrabingerHauserMottok, author = {Grabinger, Lisa and Hauser, Florian and Mottok, J{\"u}rgen}, title = {Study: Notation of Causal Graphs [Data set]}, doi = {10.5281/zenodo.7241158}, abstract = {This repository contains the material and obtained data of an eye tracking study on the topic "Notation of Causal Graphs".}, language = {en} } @misc{GrabingerHauserMottok, author = {Grabinger, Lisa and Hauser, Florian and Mottok, J{\"u}rgen}, title = {Study: Layout of Causal Graphs [Data set]}, doi = {10.5281/zenodo.7241097}, abstract = {This repository contains the material and obtained data of an eye tracking study on the topic "Layout of Causal Graphs".}, language = {en} } @misc{GrabingerHomannHauseretal., author = {Grabinger, Lisa and Homann, Alexander and Hauser, Florian and Mottok, J{\"u}rgen}, title = {Study: MISRA C coding guidelines [Data set]}, doi = {10.5281/zenodo.7898606}, abstract = {This repository contains the material and obtained data of an eye tracking study on the topic "MISRA C coding guidelines".}, language = {en} } @misc{MoserEberhardtMeyeretal., author = {Moser, Elisabeth and Eberhardt, Matthias and Meyer, Selina and Schmidhuber, Maximilian and Ketterer, Daniel}, title = {ARGO ship classification dataset [Data set]}, doi = {10.5281/zenodo.6058710}, abstract = {The ARGO ship classification dataset holds 1750 labelled images from PlanetScope-4-Band satelites. The dataset creation process and results on the dataset are published in the demo paper: {CITE} The imagery is provided as numpy binary files. All image data is licensed by Planet Labs PBC. The channel ordering is BGRN. The dataset is provided in two folders named "ship" and "non_ship". Those folders correspond to the original labels created during automated dataset creation. The files are numbered. Two additional .csv files are provided. The shipsAIS_2017_Zone17.csv file holds the AIS information on the imagery contained in the ship folder. The data was retrieved from marinecadastre.gov. During the experiments errors in the automatically created dataset emerged which are further described in the paper. The manual relabelling is supplied in the corrected_labels.csv file.}, language = {en} } @misc{RahimSchumm, author = {Rahim, Stefan and Schumm, Leon}, title = {Weather Data Cutouts for the Wasserstoffatlas (Hydrogen Map) [Data set]}, doi = {10.5281/zenodo.8135586}, abstract = {The cutouts are required to calculate the solar PV and wind onshore feed-in profiles of the Wasserstoffatlas. The provided cutouts are spatiotemporal subsets of the European weather data from the ECMWF ERA5 reanalysis dataset and the CMSAF SARAH-2 solar surface radiation dataset for the year 2013. They have been prepared by and are for use with the atlite tool (https://atlite.readthedocs.io/). ECMWF ERA5 Source: https://cds.climate.copernicus.eu/cdsapp\#!/dataset/reanalysis-era5-single-levels?tab=overview Terms of Use: https://cds.climate.copernicus.eu/api/v2/terms/static/20180314_Copernicus_License_V1.1.pdf CMSAF SARAH-2 Pfeifroth, Uwe; Kothe, Steffen; M{\"u}ller, Richard; Trentmann, J{\"o}rg; Hollmann, Rainer; Fuchs, Petra; Werscheck, Martin (2017): Surface Radiation Data Set - Heliosat (SARAH) - Edition 2, Satellite Application Facility on Climate Monitoring, DOI:10.5676/EUM_SAF_CM/SARAH/V002, https://doi.org/10.5676/EUM_SAF_CM/SARAH/V002 Terms of Use: https://www.eumetsat.int/cs/idcplg?IdcService=GET_FILE\&dDocName=pdf_leg_data_policy\&allowInterrupt=1\&noSaveAs=1\&RevisionSelectionMethod=LatestReleased}, language = {en} } @misc{BittnerEzerGrabingeretal., author = {Bittner, Dominik and Ezer, Timur and Grabinger, Lisa and Hauser, Florian and Mottok, J{\"u}rgen}, title = {Eye Tracking based Learning Style Identification for Learning Management Systems [Data set]}, doi = {10.5281/zenodo.8349468}, abstract = {In recent years, universities have been faced with increasing numbers of students dropping out. This is partly due to the fact that students are limited in their ability to explore individual learning paths through different course materials. However, a promising remedy to this issue is the implementation of adaptive learning management systems. These systems recommend customised learning paths to students - based on their individual learning styles. Learning styles are commonly classified using questionnaires and learning analytics, but both methods are prone to error. Questionnaires may yield superficial responses due to time constraints or lack of motivation, while learning analytics ignore offline learning behaviour. To address these limitations, this study aims to integrating Eye Tracking for a more accurate classification of students' learning styles. Ultimately, this comprehensive approach could not only open up a deeper understanding of subconscious processes, but also provide valuable insights into students' unique learning preferences.}, language = {en} } @misc{Staufer, author = {Staufer, Susanne}, title = {Persistence of Learning Style, Learning Strategy, and Personality Traits [Data set]}, doi = {10.5281/zenodo.12743866}, abstract = {This dataset contains the result of the survey to learning styles, learning strategies, and personality traits. The survey was executed in winter term 2023/24 and summer term 2023 in a German university (OTH Regensburg) during the course "Software Engineering". Examined questionnaires are ILS (learning styles), LIST-K (learning strategies), and BFI-10 (personality traits). The same three questionnaires were asked at two different survey periods three to four months apart while each survey period lasts one to two weeks. Pretest data were examined at the start of the term, while posttest data at the end.}, language = {en} } @misc{Bugert, author = {Bugert, Flemming}, title = {Applying Ariadne: Dataset on Learning Styles and Moodle-Based Learning Paths [Data set]}, doi = {10.5281/zenodo.12594911}, abstract = {This dataset contains information queried from 22 students inside a Moodle based learning management system during the winter term 2023/24 at a German university. Abstract With the use of learning management systems students benefit from being recommended suitable learning elements based on their individual needs. In doing so, recommendation algorithms are applied which first query the student's learning style. To improve the recommendation of learning elements a continuous analysis of the individual's learning style is required. A frequent questionnaire assessment would however be too time consuming. Instead, in a prior study an algorithm has been designed to identify changes in learning styles from the student's selection of learning elements. In this paper, we investigate the functionality of that algorithm by applying it on real student data. In particular, we test if the algorithm correctly indicates changes in learning styles. The utilised data is collected in our learning management system. To be precise, the data is obtained from 22 students enrolled in a software engineering course during the winter term of 2023/24. The data comprises two types of information for each student: 1) learning style collected at the start and end of the term, and 2) the user's actual selection of learning elements inside the learning management system. The uniqueness of this study lies in the data and the evaluation strategy based on it. Having the learning style at the end of the semester period as ground truth allows us to test if the algorithm operates correctly with actual user data from our learning management system. The results validate the behaviour of our algorithm, yet they strongly suggest the need for an adaptation. Further research is required on how to parameterise the underlying models.}, language = {en} } @misc{SchmidbauerLobeSchaeferetal., author = {Schmidbauer, Lukas and Lobe, Elisabeth and Sch{\"a}fer, Ina and Mauerer, Wolfgang}, title = {It's Quick to be Square: Fast Quadratisation for Quantum Toolchains [Data set]}, doi = {10.5281/zenodo.14245588}, abstract = {Many of the envisioned use-cases for quantum computers involve optimisation processes. While there are many algorithmic primitives to perform the required calculations, all eventually lead to quantum gates operating on quantum bits, with an order as determined by the structure of the objective function and the properties of target hardware. When the structure of the problem representation is not aligned with structure and boundary conditions of the executing hardware, various overheads to degrade the computation may arise, possibly negating any possible quantum advantage. Therefore, automatic transformations of problem representations play an important role in quantum computing when descriptions (semi-)targeted at humans must be cast into forms that can be executed on quantum computers. Mathematically equivalent formulations are known to result in substantially different non-functional properties depending on hardware, algorithm and detail properties of the problem. Given the current state of noisy-intermediate scale quantum hardware (NISQ), these effects are considerably more pronounced than in classical computing. Likewise, efficiency of the transformation itself is relevant because possible quantum advantage may easily be eradicated by the overhead of transforming between representations. In this paper we consider a specific class of higher-level representations (polynomial unconstrained binary optimisation problems), and devise novel automatic transformation mechanisms into widely used quadratic unconstrained binary optimisation problems that substantially improve efficiency and versatility over the state of the art. We also identify what influence factors of lower-level details can be abstracted away in the transformation process, and which details must be made available to higher-level abstractions.}, language = {en} } @misc{BirettSchummHofrichteretal., author = {Birett, Falk and Schumm, Leon and Hofrichter, Andreas and Heusgen, Valentin and Rahim, Stefan}, title = {Wasserstoffatlas Deutschland (Hydrogen Map) [Data set]}, doi = {10.5281/zenodo.13960465}, abstract = {Input files required for Hydrogen Map workflow in the project "Wasserstoffatlas Deutschland", funded by the BMBF.}, language = {en} } @misc{StockerLehrer, author = {Stocker, Philipp and Lehrer, Tobias}, title = {Machine Learning Dataset of U-Channel Sheet Metal Geometry Representations with Supervision Information for Drawability Assessment and Part Segmentation [Data set]}, doi = {10.5281/zenodo.15327950}, abstract = {The dataset contains 2533 geometries from four different parametric CAD models sampled from the U-Channel python package. The representations include the original CAD geometries (.step), graph binaries (.bin), meshes (.off), and point clouds (.xyz). Additionally, we provide labels for supervised learning use cases of local and global drawability assessment and part segmentation (.json) for all representations. Custom label computation for drawability assessment is enabled by the provided strains.zip file, which contains minor and major true strains for the given meshes. For more details, refer to the associated publication.}, language = {en} } @misc{SchmidbauerMauerer, author = {Schmidbauer, Lukas and Mauerer, Wolfgang}, title = {SAT Strikes Back: Parameter and Path Relations in Quantum Toolchains [Data set]}, doi = {10.5281/zenodo.15464391}, abstract = {In the foreseeable future, toolchains for quantum computing should offer automatic means of transforming a high level problem formulation down to a hardware executable form. Thereby, it is crucial to find (multiple) transformation paths that are optimised for (hardware specific) metrics. We zoom into this pictured tree of transformations by focussing on k-SAT instances as input and their transformation to QUBO, while considering structure and characteristic metrics of input, intermediate and output representations. Our results can be used to rate valid paths of transformation in advance—also in automated (quantum) toolchains. We support the automation aspect by considering stability and therefore predictability of free parameters and transformation paths. Moreover, our findings can be used in the manifesting era of error correction (since considering structure in a high abstraction layer can benefit error correcting codes in layers below). We also show that current research is closely linked to quadratisation techniques and their mathematical foundation.}, language = {en} } @misc{Kriegl, author = {Kriegl, Raphael}, title = {Tunable rebound of millimeter-sized rigid balls by magnetic actuation of elastomer-based surface microstructures [Data set]}, doi = {10.5281/zenodo.10419411}, language = {en} } @misc{Kriegl, author = {Kriegl, Raphael}, title = {Characterization of Wetting Properties of Magnetoactive Elastomer Surfaces [Data set]}, doi = {10.5281/zenodo.13124610}, language = {en} } @misc{Kriegl, author = {Kriegl, Raphael}, title = {Preservation of wetting ridges using field-induced plasticity of magnetoactive elastomers (Version 3) [Data set]}, doi = {10.5281/zenodo.14502155}, abstract = {How to access data: html: Open in browser to view interactive figure pdf/png: Static figure, open with desired program json: Contains data for figures Open using Python pandas: import pandas as pd data = pd.read_json("filename") data then contains a pandas table. The cells in columns describing x,y data might contain entire arrays. Naming: Figure files are named after their respective ordering (i.e. figure1_*). Data and figure files are always named correspondingly. Zip archives (indiv_3D_*.zip) contain multiple additional figures, one for each surface measurement. There is a zip archive with the static renders and one with the interactive plots.}, language = {en} } @misc{MauererJoblinTamburrietal., author = {Mauerer, Wolfgang and Joblin, Mitchell and Tamburri, Damian Andrew and Paradis, Carlos and Kazman, Rick and Apel, Sven}, title = {In Search of Socio-Technical Congruence: A Large-Scale Longitudinal Study [Data set]}, doi = {10.5281/zenodo.4766388}, language = {en} } @misc{MauererScherzinger, author = {Mauerer, Wolfgang and Scherzinger, Stefanie}, title = {Nullius in Verba - Reproducibility Tutorial [Data set]}, doi = {10.5281/zenodo.4730023}, abstract = {Reproduction package (docker image) for the ICDE 2021 tutorial "Nullius in Verba".}, language = {en} } @misc{GlavanBelyaevaShamoninChamonine, author = {Glavan, Gašper and Belyaeva, Inna A. and Shamonin (Chamonine), Mikhail}, title = {On the Piezomagnetism of Magnetoactive Elastomeric Cylinders in Uniform Magnetic Fields: Height Modulation in the Vicinity of an Operating Point by Time-Harmonic Fields [Data set]}, doi = {10.5281/zenodo.13834054}, language = {en} } @misc{GlavanBelyaevaShamoninChamonine, author = {Glavan, Gašper and Belyaeva, Inna A. and Shamonin (Chamonine), Mikhail}, title = {Multiferroic Cantilevers Containing a Magnetoactive Elastomer: Magnetoelectric Response to Low-Frequency Magnetic Fields of Triangular and Sinusoidal Waveform [Data set]}, doi = {10.5281/zenodo.14651784}, language = {en} } @inproceedings{WagnerHayNeidhartetal., author = {Wagner, Bernd and Hay, Stefan and Neidhart, Thomas and Spirkl, Florian and Ried, Michael and Zrenner, Louis and Weidlich, Ingo and Gabriel, Eugen and Banning, Timo}, title = {TFSB as Bedding Material in District Heating Pipe Constructin - Scientifically Proven Long-Term Experience}, series = {Proceedings of the 19th International Symposium on District Heating and Cooling; 2025, Genk (Belgium)}, booktitle = {Proceedings of the 19th International Symposium on District Heating and Cooling; 2025, Genk (Belgium)}, editor = {Vanhoudt, Dirk}, publisher = {Springer}, address = {Cham}, isbn = {9783032098443}, doi = {10.1007/978-3-032-09844-3_10}, pages = {99 -- 108}, abstract = {Following the explanation of the increasing importance of alternative backfill materials like TFSB, TFSB and their status in terms of science and technology are depicted. Selected results of the research project FW-ZFSV 4.0 are presented: computer-aided static calculation, in situ long term loading of district heating pipes in TFSB and sand, quality assurance and resource conservation. The conclusions provide an overall assessment of the use of TFSB in district heating pipe construction.}, language = {en} } @misc{Spirkl, author = {Spirkl, Florian}, title = {Untersuchungen und Analyse des Verhaltens von B{\"o}den und Boden-Bindemittel-Gemischen unter zyklischer Belastung}, pages = {32}, abstract = {W{\"a}hrend es zahlreiche Untersuchungen zum Verhalten von B{\"o}den unter zyklischen und dynamischen Belastungen gibt, gibt es nur wenige Ver{\"o}ffentlichungen zu zyklischen Belastungen an Bindemittel-stabilisierter B{\"o}den. Dabei werden diese Boden-Bindemittel-Gemische (BBG) vielseitig eingesetzt (z.B. qualifizierte Bodenverfestigung, Bodenmischs{\"a}ulen, zeitweise fließf{\"a}hige Erdbaustoffe). Die durchgef{\"u}hrten Versuche zielen darauf ab, ein tiefergehendes Verst{\"a}ndnis f{\"u}r das Materialverhalten von BBG zu gewinnen. Hierf{\"u}r wurden an verschiedenen Mischungen zyklische Versuche mit variierenden Spannungsamplituden durchgef{\"u}hrt. Die bisher durchgef{\"u}hrten Versuche untersuchen sowohl Zyklen im niedrigen Lastbereich als auch im hohen Lastbereich nahe der einaxialen Druckfestigkeit. G{\"a}ngige Modelle zur Beschreibung des Setzungsverhaltens in Folge von zyklischer Einwirkung werden vorgestellt und mit den Ergebnissen f{\"u}r BBG verglichen.}, language = {de} } @article{KranzWagnerPointneretal., author = {Kranz, Michael and Wagner, Maria Stella and Pointner, Daniel and Haus, Moritz and Lubnow, Matthias and Lehle, Karla and Krenkel, Lars}, title = {Polymer embedding of membrane lungs for histological investigations of intra-device clot formation}, series = {Cardiovascular Medicine}, volume = {13}, journal = {Cardiovascular Medicine}, publisher = {Frontiers}, address = {Lausanne}, doi = {10.3389/fcvm.2026.1650978}, pages = {21}, abstract = {Extracorporeal membrane oxygenation (ECMO) is an invasive but potentially lifesaving treatment option for severe cardiac or respiratory failure. Despite its beneficial effect, coagulation-related complications, mainly due to clot formation, excessive bleeding and the accumulation of deposits in the membrane lung (ML) remain common, causing higher mortality. In this context, the formation of clots and other deposits in the ML is of particular interest. Previous histological examinations of the polymethylpentene fiber mats inside the ML could only be performed in a top view, prohibiting valid quantification and examination of the multi-layered deposits or fiber mat spanning structures. Our objective was the establishment of a polymer embedding to increase the mechanical stability of the deposits and thus enable cross-sectional microtome cutting through the ML hollow-fibers. Clinically used MLs (PLS, Getinge, Rastatt, Germany) were stabilized with a polymer resin (HistoCURE 8100). Specimens were cut out of the embedded MLs and microtome sections with a thickness of 10 µm were performed. In addition to standard histological staining with hematoxylin-eosin (HE) and Pappenheim (May-Grunwald-Giemsa), fluorescence DNA staining for nucleated cells with 4′,6-diamidino-2-phenylindole (DAPI) and SYTOX™ Green as well as immunohistochemical and immunofluorescence staining for the lysosomal enzyme myeloperoxidase (MPO) and von Willebrand factor (vWF) were established. The protocol provides a method for large volume embedding (400 mL). The cellular and extracellular deposits were securely fixed by the polymer scaffold allowing the examination of clots in MLs in native position which was not possible with conventional paraffin embedding. Multi-layered deposits and fiber mat spanning structures are no longer disrupted during specimen extraction and can now be quantified. Staining with HE, Pappenheim, DAPI, SYTOX™ Green, MPO, and vWF was successfully tested with this protocol. This method may be the foundation for new insights into the complex clotting phenomena observed in MLs}, language = {en} } @misc{BesserGiraudHammonetal., author = {Besser, Elisabeth and Giraud, Jara and Hammon, Michaela and Mayer, Josefa and Schiener, Sophie and Mertens, Johannis and Pfingsten, Andrea}, title = {Kulturell adaptierte Schmerzgeschichte f{\"u}r die PNE im deutschsprachigen Raum}, series = {9. Forschungssymposium Physiotherapie (FSPT), 2025, Bremen}, volume = {21}, journal = {9. Forschungssymposium Physiotherapie (FSPT), 2025, Bremen}, number = {S02}, publisher = {Thieme}, address = {Stuttgart}, doi = {10.1055/s-0045-1811330}, abstract = {Einleitung Pain Neuroscience Education (PNE) ist eine Aufkl{\"a}rungsstrategie, welche das Ziel hat, Schmerzpatient*innen neurophysiologische und -biologische Vorg{\"a}nge im K{\"o}rper mittels Metaphern und Geschichten zu vermitteln. Der Wissenszugewinn {\"u}ber schmerzphysiologische Prozesse kann - insbesondere bei chronischen Schmerzpatient*innen - psychosoziale Symptome wie Bewegungsangst und Katastrophisierung von Schmerz positiv beeinflussen und zu einem Umdenken im Umgang mit Schmerz anregen. Trotz zahlreicher PNE-Studien wird die vermutlich entscheidende Anpassung von Schmerzgeschichten an den kulturellen Hintergrund der Betroffenen bis jetzt kaum ber{\"u}cksichtigt. Ziel des Projekts war es, eine f{\"u}r die deutsche Kultur angepasste Schmerzgeschichte nach dem Vorbild des amerikanischen „Why You Hurt"- Konzepts zu entwickeln und diese hinsichtlich ihrer Verst{\"a}ndlichkeit und Anwendbarkeit zu {\"u}berpr{\"u}fen Material und Methodik Auf Grundlage der Literatur sowie eines fachlichen Austauschs mit dem PNE-Experten Prof. Dr. Emilio „Louie" Puentedura wurde eine metaphorische, kulturell adaptierte Schmerzgeschichte entwickelt und grafisch aufbereitet. Die Datenerhebung erfolgte durch leitfadengest{\"u}tzte Interviews mit jeweils drei Therapeut*innen und Patient*innen. Die Auswertung erfolgte mittels qualitativer Inhaltsanalyse in MAXQDA. Ergebnisse Die Teilnehmenden beschrieben die Geschichte als „leicht verst{\"a}ndlich, nachvollziehbar und anschaulich". Die Kombination aus Erz{\"a}hlung und graphischer Darstellung erleichterte das Verst{\"a}ndnis der physiologischen Vorg{\"a}nge. Therapeut*innen reagierten positiv auf die Umsetzbarkeit und signalisierten Bereitschaft zur k{\"u}nftigen Anwendung, bevorzugt mit geringem organisatorischem Aufwand - etwa in Form von Karten mit variierenden Inhalten oder einer App-Version. Zus{\"a}tzlich wurde erw{\"a}hnt, die Geschichte nur bei Kindern anzuwenden. Zusammenfassung Die erstellte Schmerzgeschichte wurde von den Befragten als verst{\"a}ndlich und umsetzbar bewertet. Zuk{\"u}nftig sollten weitere quantitative Studien mit gr{\"o}ßerer Teilnehmerzahl durchgef{\"u}hrt werden, um belastbarere Aussagen bez{\"u}glich der Anwendbarkeit und des Verst{\"a}ndnisses von Schmerzgeschichten in der Gesamtpopulation treffen zu k{\"o}nnen. Neben der kulturellen Adaptation k{\"o}nnte auch die Anpassung an das Bildungsniveau sowie das Alter der Betroffenen und eine m{\"o}gliche PNE-App f{\"u}r zuk{\"u}nftige Untersuchungen relevant sein.}, subject = {PNE}, language = {de} } @techreport{SchwarzBockWeiss, author = {Schwarz, Philipp and Bock, Sebastian and Weiß, Martin}, title = {Abschlussbericht Projekt LeaP - Learning Poses : Posenerkennung mit Neuronalen Netzen}, address = {Regensburg}, doi = {10.35096/othr/pub-8851}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-88514}, pages = {45}, abstract = {Die Sch{\"a}tzung der 6D-Pose bekannter Objekte findet Anwendungen in der Robotik, der Luft- und Raumfahrtsteuerung und automatisierten Produktionsumgebungen. Es ist nach wie vor g{\"a}ngige Praxis, klassische Bildverarbeitungsmethoden zu verwenden, um eine hohe Pr{\"a}zision zu erreichen. Diese Methoden erfordern jedoch eine manuelle Parametrisierung der verwendeten Erkennungswerkzeuge f{\"u}r jedes einzelne Objekt. Dies wirft die Frage auf, ob maschinelle Lerntechniken, insb. convolutional neural networks, Netzwerke, so trainiert werden k{\"o}nnen, dass sie die in der Industrie geforderte Pr{\"a}zision ohne individuelle Programmierung erreichen k{\"o}nnen. Dar{\"u}ber sollen in Produktionsumgebungen Umwelteinfl{\"u}sse wie Lichtverh{\"a}ltnisse minimiert werden. Es werden verschiedene Netzstrukturen entwickelt und auf ihre Leistung bei diesem Szenario untersucht, mit 1 bis 6 Freiheitsgraden in der Aufgabenstellung und einer oder mehreren Kameras. Zus{\"a}tzlich wird ein Ansatz mit reinforcement learning entwickelt und untersucht.}, language = {de} } @techreport{Schultz, author = {Schultz, Maximilian}, title = {1.Bericht f{\"u}r das Regensburg Center of Health Sciences and Technology (RCHST)}, volume = {2024}, publisher = {OTH Regensburg}, address = {Regensburg}, doi = {10.35096/othr/pub-7312}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-73125}, pages = {17}, abstract = {Der vorliegende Bericht zeigt den aktuellen Stand des Projekts „K{\"u}nstliche Intelligenz f{\"u}r Nichtregierungsorganisationen (KINiro) - Bedarf, Akzeptanz und Umsetzungsm{\"o}glichkeiten" an der OTH Regensburg am Institut f{\"u}r Sozialforschung und Technikfolgenabsch{\"a}tzung (IST). Im Projektbericht wird das Projekt KINiro mit besonderem Blick auf die Erkenntnisse und T{\"a}tigkeiten im Gesundheitswesen aufgezeigt. Das Projekt KINiro wird mit Laufzeit Januar 2023 bis Dezember 2025 durch das Bundesministerium f{\"u}r Familie, Senioren, Frauen und Jugend (BMFSFJ) gef{\"o}rdert. Eine zus{\"a}tzliche Unterst{\"u}tzung bietet das Regensburg Center of Health Sciences and Technology (RCHST)}, language = {de} } @article{QiaoGradNonn, author = {Qiao, Yu and Grad, Marius and Nonn, Aida}, title = {Toward an Efficient and Robust Process-Structure Prediction Framework for Filigree L-PBF 316L Stainless Steel Structures}, series = {Metals}, volume = {15}, journal = {Metals}, number = {7}, publisher = {MDPI}, issn = {2075-4701}, doi = {10.3390/met15070812}, pages = {22}, abstract = {Additive manufacturing (AM), particularly laser powder bed fusion (L-PBF), provides unmatched design flexibility for creating intricate steel structures with minimal post-processing. However, adopting L-PBF for high-performance applications is difficult due to the challenge of predicting microstructure evolution. This is because the process is sensitive to many parameters and has a complex thermal history. Thin-walled geometries present an added challenge because their dimensions often approach the scale of individual grains. Thus, microstructure becomes a critical factor in the overall integrity of the component. This study focuses on applying cellular automata (CA) modeling to establish robust and efficient process-structure relationships in L-PBF of 316L stainless steel. The CA framework simulates solidification-driven grain evolution and texture development across various processing conditions. Model predictions are evaluated against experimental electron backscatter diffraction (EBSD) data, with additional quantitative comparisons based on texture and morphology metrics. The results demonstrate that CA simulations calibrated with relevant process parameters can effectively reproduce key microstructural features, including grain size distributions, aspect ratios, and texture components, observed in thin-walled L-PBF structures. This work highlights the strengths and limitations of CA-based modeling and supports its role in reliably designing and optimizing complex L-PBF components.}, language = {en} } @inproceedings{SchwaegerlUhrigWestfechtel, author = {Schw{\"a}gerl, Felix and Uhrig, Sabrina and Westfechtel, Bernhard}, title = {A Graph-based Algorithm for Three-way Merging of Ordered Collections in EMF Models}, series = {Science of Computer Programming}, volume = {113}, booktitle = {Science of Computer Programming}, number = {Part 1}, doi = {10.1016/j.scico.2015.02.008}, pages = {51 -- 81}, abstract = {In EMF models, ordered collections appear as the values of multi-valued structural features. Traditional, text-based version control systems do not sufficiently support three-way merging of ordered collections inside EMF models since they cannot guarantee a consistent result. The operation three-way merging is defined as follows: based on a common base version b, two alternative versions and were developed by copying and modifying the base version. To reconcile these changes, a merged version m is to be created as a common successor of and . In this paper, we present a graph algorithm to solve the problem of three-way merging of ordered collections in EMF models. Each version of a collection can be represented by means of a linearly ordered graph. To create the merged version, these graphs are combined to a merged collection graph using set formula. To create the merged collection, a generalized topological sort is performed on the merged collection graph. Conflicts occur in case the order of elements cannot be deduced automatically; these conflicts are resolved either interactively or by default rules. We have implemented the merge algorithm in our tool BTMerge, which performs a consistency-preserving three-way merge of versions of EMF models being instances of arbitrary Ecore models. Our implementation relies on an alternative form of representing multiple versions of a collection, namely a versioned collection graph which forms a superimposition of collection versions. The algorithm presented here is purely state-based. Matching and merging of collections are clearly separated sub-problems. Insertions and deletions performed on the elements of the collection are propagated into the merged version in a consistent way. Our algorithm makes only minimal assumptions with regard to the underlying product model and thus may be applied to ordered collections inside plain text or XML files. By taking arbitrary move operations into account, the algorithm considerably goes beyond the functionality of contemporary merge tools which cannot adequately handle move operations.}, language = {en} } @inproceedings{BuchmannSchwaegerl, author = {Buchmann, Thomas and Schw{\"a}gerl, Felix}, title = {Breaking the Boundaries of Meta Models and Preventing Information Loss in Model-Driven Software Product Lines}, series = {Proceedings of the 11th International Conference on Evaluation of Novel Software Approaches to Software Engineering, Vol 1, 2016, Rome, Italy}, booktitle = {Proceedings of the 11th International Conference on Evaluation of Novel Software Approaches to Software Engineering, Vol 1, 2016, Rome, Italy}, publisher = {SCITEPRESS - Science and and Technology Publications}, doi = {10.5220/0005789100730083}, pages = {83}, abstract = {Model-driven software product line engineering is an integrating discipline for which tool support has become available recently. However, existing tools are still immature and have several weaknesses. Among others, limitations in variability, caused by meta model restrictions, and unintended information loss are not addressed. In this paper, we present two conceptual extensions to model-driven product line engineering based on negative variability, being alternative mappings and surrogates. Alternative mappings allow for unconstrained variability, mitigating meta model restrictions by virtually extending the underlying multi-variant domain model. Surrogates prevent unintended information loss during product derivation based on a contextsensitive product analysis, which can be controlled by a declarative OCL-based language. Both extensions have been implemented in FAMILE, a model-driven product line tool that is based on EMF, provides dedicated consistency repair mechanisms, and completely automates application engineering. The added value of alternative mappings and surrogates is demonstrated by a running example.}, language = {en} } @inproceedings{SchwaegerlUhrigWestfechtel, author = {Schw{\"a}gerl, Felix and Uhrig, Sabrina and Westfechtel, Bernhard}, title = {Model-based tool support for consistent three-way merging of EMF models}, series = {ACME '13, Proceedings of the workshop on ACadeMics Tooling with Eclipse}, booktitle = {ACME '13, Proceedings of the workshop on ACadeMics Tooling with Eclipse}, publisher = {ACM}, address = {New York, NY, USA}, doi = {10.1145/2491279.2491281}, abstract = {Inadequate version control has been identified as a major obstacle to the application of model-driven software engineering. In particular, sophisticated support for merging model versions is urgently needed. We present a tool for merging of EMF models which may be applied to instances of arbitrary Ecore models. The tool advances the state of the art by guaranteeing a consistent merge result. Furthermore, it detects and resolves not only context-free, but also context-sensitive conflicts. Our merge tool is model-based; it relies on EMF for its implementation. Initial experiences gained from its application confirm that the merge tool operates both accurately and efficiently.}, language = {en} } @unpublished{Chow, author = {Chow, Rosan}, title = {Narcissistic and Embodied Human-Centered-Design}, isbn = {978-3-0356-3012-1}, doi = {10.35096/othr/pub-8755}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-87557}, pages = {5}, abstract = {In recent years, there have been calls to replace Human-Centered-Design (HCD) with More-Than-Human-Design (MTHD). The proponents of MTHD dismiss HCD for various reasons; however, the fact that they use the same title, terms and phrases such as posthuman, decenter human, anti-anthropocentric; systematically or not, coherently or not, together they create a strong sense that HCD is pass{\´e} and must be left behind. Anthropocentrism has gotten a lot of beatings from multiple quarters to the extent that the term carries now a negative connotation. This negative mood seems to get carried away and over to the criticisms of HCD as human-centered is synonymous with anthropocentric. My contribution is to point out, while anthropocentrism is a position of value; it might also be understood as an inescapable condition. Before the MTHD movement sweeps away indiscriminately all HCD, a more careful look is in order.}, subject = {Design, Human-Centered, Posthuman, Anthropocentrism}, language = {en} } @inproceedings{SachenbacherLeucker, author = {Sachenbacher, Martin and Leucker, Martin}, title = {Towards Monitoring and Diagnosis of Quantum Digital Twins}, series = {Lecture Notes in Informatics (LNI)}, volume = {P-366}, booktitle = {Lecture Notes in Informatics (LNI)}, publisher = {Gesellschaft f{\"u}r Informatik e.V.}, address = {Bonn}, doi = {10.18420/INF2025_159}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-87546}, pages = {1767 -- 1772}, abstract = {As access to larger-scale quantum computers is still limited, it is useful to simulate quantum algorithms on specialized programmable logic hardware such as FPGAs to exploit analogies between quantum and digital circuits, and allow for analysis and efficient debugging of quantum programs. Such simulations can be viewed as digital representations of actual physical systems, commonly referred to as Digital Twins (DTs). In previous work, we applied formal methods from runtime verification to synthesize monitors capable of real-time analysis of conventional DTs. Specifically, these monitors supervise alignment with their physical counterparts and support model-based diagnosis to identify potential root causes of observed deviations. In this short paper, we present ongoing work aimed at adapting and extending our approach to hardware-based simulation and analysis of quantum software on FPGAs, with the objective of improving both accuracy and resilience.}, language = {en} } @misc{GschossmannSchedelSuessetal., author = {Gschoßmann, Lukas and Schedel, Valentin and S{\"u}ß, Franz and Weber, Markus and Pfingsten, Andrea and Dendorfer, Sebastian}, title = {Evaluating Knee Joint Loads Across Exercises and Activities of Daily Living to Personalize TKA Rehabilitation}, series = {ISB 2025 - The XXX Congress of the International Society of Biomechanics, 27.-31. July 2025, Stockholm}, journal = {ISB 2025 - The XXX Congress of the International Society of Biomechanics, 27.-31. July 2025, Stockholm}, doi = {10.35096/othr/pub-8725}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-87252}, pages = {1}, abstract = {This study assessed knee joint loading during various physiotherapy exercises and activities of daily living in 30 healthy subjects. Results showed that lunges and squats caused the highest joint forces, while gait and stair activities also imposed substantial loads. These findings support datadriven exercise selection for personalized rehabilitation after total knee arthroplasty.}, language = {en} } @incollection{Chow, author = {Chow, Rosan}, title = {Narcissistic- und Embodied Human-Centered-Design}, series = {Nutzen statt Besitzen}, booktitle = {Nutzen statt Besitzen}, editor = {Brandes, Uta and Bieling, Tom and Christensen, Michelle and Jonas, Wolfgang}, publisher = {Birkh{\"a}user}, address = {Basel}, isbn = {978-3-0356-3012-1}, pages = {91 -- 101}, abstract = {In recent years, there have been calls to replace Human-Centered-Design (HCD) with More-Than-Human-Design (MTHD). The proponents of MTHD dismiss HCD for various reasons; however, the fact that they use the same title, terms and phrases such as posthuman, decenter human, anti-anthropocentric; systematically or not, coherently or not, together they create a strong sense that HCD is pass{\´e} and must be left behind. Anthropocentrism has gotten a lot of beatings from multiple quarters to the extent that the term carries now a negative connotation. This negative mood seems to get carried away and over to the criticisms of HCD as human-centered is synonymous with anthropocentric. My contribution is to point out, while anthropocentrism is a position of value; it might also be understood as an inescapable condition. Before the MTHD movement sweeps away indiscriminately all HCD, a more careful look is in order.}, language = {de} }