@article{DiwersySchulzeKruedener2020, author = {Diwersy, Bettina and Schulze-Kr{\"u}dener, J{\"o}rgen}, title = {Emprunter de nouveaux chemins transnationaux}, series = {La Revue Fran{\c{c}}aise de Service Social}, journal = {La Revue Fran{\c{c}}aise de Service Social}, number = {3}, pages = {89 -- 95}, year = {2020}, subject = {Transnationalisierung}, language = {de} } @article{DiwersyKoengeterTull2020, author = {Diwersy, Bettina and K{\"o}ngeter, Stefan and Tull, Marc}, title = {Creative Teaching Methods}, series = {Demo.il}, volume = {-}, journal = {Demo.il}, year = {2020}, subject = {Unterrichtsmethode}, language = {en} } @article{Diwersy2020, author = {Diwersy, Bettina}, title = {Oral History \& Memory}, series = {Demo.il}, volume = {2020}, journal = {Demo.il}, year = {2020}, subject = {Oral history}, language = {en} } @article{Diwersy2019, author = {Diwersy, Bettina}, title = {Transnationaler Kinderschutz in der Großregion}, series = {Sozialmagazin}, volume = {44}, journal = {Sozialmagazin}, number = {9-10}, pages = {95 -- 97}, year = {2019}, subject = {Transnationalisierung}, language = {de} } @incollection{VilainHeuberger2020, author = {Vilain, Michael and Heuberger, Matthias}, title = {Algorithmen, Gesch{\"a}ftsmodelle und strategische Netzwerkpartnerschaften Die digitale Zukunft der Sozialwirtschaft - ein Blick hinter die Kulissen aktueller Forschungs- und Entwicklungsprojekte}, series = {Wege in die digitale Zukunft}, booktitle = {Wege in die digitale Zukunft}, publisher = {Nomos Verlag}, address = {Baden-Baden}, pages = {125 -- 136}, year = {2020}, subject = {Nonprofit-Bereich}, language = {de} } @article{ChenWuestenbergStiglbaueretal.2023, author = {Chen, Ke and W{\"u}stenberg, Torsten and Stiglbauer, Victoria and El-Ahmad, Linda and Rosenthal, Annika and Pelz, Patricia and Gold, Stefan M. and Heinz, Andreas and Sebold, Miriam}, title = {Distinct dynamic behavioural response to social exclusion in male patients with a history of alcohol dependence}, series = {Addiction Biology}, volume = {28}, journal = {Addiction Biology}, number = {7}, publisher = {Wiley}, issn = {1355-6215}, doi = {https://doi.org/10.1111/adb.13287}, year = {2023}, abstract = {Social exclusion contributes to alcohol consumption, whereas the development of alcohol dependence (AD) can in turn lead to the social exclusion of people with AD. Previous research observed altered neural responses to experimentally induced social exclusion (i.e., Cyberball game) in patients with AD. In addition, inflammation has been associated with both social behaviours and AD. Our study aimed to investigate the dynamic behavioural response and the inflammatory effects of social exclusion in male patients with a history of AD. To this end, we analysed dynamic changes in ball tossing during a partial exclusion Cyberball game and the cytokine interleukin (IL)-1b in saliva in 31 male patients who had a history of AD and 29 gender-matched healthy controls without AD. Participants were included in the first 2 min of the Cyberball game and then excluded by one of the two co-players in the proceeding 5 min. Saliva was collected three times: one before and two after the Cyberball game. Across groups, participants passed the ball more often to the excluder during the partial exclusion period. Analysis using piece-wise linear mixed models showed that patients rapidly increased ball tosses to the excluder upon exclusion, which lasted to the late response phase, whereas the early behavioural response to exclusion took longer for controls. There was no significant change of salivary IL-1b level to exclusion in either patients or controls. The results indicate a distinct dynamic behavioural response to social exclusion in male patients with a history of AD.}, subject = {Alkoholismus}, language = {en} } @article{EbrahimiGarbusowSeboldetal.2023, author = {Ebrahimi, Claudia and Garbusow, Maria and Sebold, Miriam and Chen, Ke and Smolka, Michael N. and Huys, Quentin J.M. and Zimmermann, Ulrich S. and Schlagenhauf, Florian and Heinz, Andreas}, title = {Elevated Amygdala Responses During De Novo Pavlovian Conditioning in Alcohol Use Disorder Are Associated With Pavlovian-to-Instrumental Transfer and Relapse Latency}, series = {Biological Psychiatry Global Open Science}, volume = {3}, journal = {Biological Psychiatry Global Open Science}, number = {4}, publisher = {Elsevier BV}, issn = {2667-1743}, doi = {https://doi.org/10.1016/j.bpsgos.2023.02.003}, pages = {803 -- 813}, year = {2023}, subject = {Alkoholismus}, language = {en} } @article{IsıklıBektaşTameretal.2024, author = {Is{\i}kl{\i}, Serhan and Bekta{\c{s}}, Asl{\i}han Bilge and Tamer, Şule and Atabay, Murat and Arkal{\i}, Bilgesu Deniz and Bağc{\i}, Ba{\c{s}}ak and Bayrakc{\i}, Adem and Sebold, Miriam and Zorlu, Nabi}, title = {Effort-cost decision-making associated with negative symptoms in schizophrenia and bipolar disorder}, series = {Behavioural Brain Research}, volume = {467}, journal = {Behavioural Brain Research}, publisher = {Elsevier BV}, issn = {0166-4328}, doi = {https://doi.org/10.1016/j.bbr.2024.114996}, year = {2024}, subject = {Manisch-depressive Krankheit}, language = {en} } @article{TsamitrosGutwinskiBecketal.2024, author = {Tsamitros, N. and Gutwinski, S. and Beck, A. and Lange Mussons, S. and Sebold, Miriam and Sch{\"o}neck, R. and Wolbers, T. and Bermpohl, F. and Heinz, A. and L{\"u}tt, A.}, title = {Craving induction through virtual reality cue-exposure for patients with alcohol dependence in rehabilitation treatment}, series = {Scientific Reports}, volume = {14}, journal = {Scientific Reports}, number = {1}, publisher = {Springer Science and Business Media LLC}, issn = {2045-2322}, doi = {https://doi.org/10.1038/s41598-024-81071-0}, year = {2024}, abstract = {New therapeutic approaches for alcohol dependence (AD) include virtual reality (VR)-based treatments offering scalable options for cue exposure (CE), a well-established strategy in cognitive behavioral therapy. This study aimed to evaluate the feasibility and tolerability of a new VR-CE paradigm. On an explorative basis, factors influencing the induction of craving were examined. This single-arm monocentric clinical study included n = 21 patients with AD in inpatient rehabilitation treatment, that completed one VR-CE session including confrontation with alcohol-associated stimuli. Measurements of subjective craving before, during and after exposure, affective states, VR side effects as cybersickness and the sense of presence in VR were conducted. Craving levels during and directly after VR-CE were significantly higher than before the intervention. Craving levels 20 min after VR-CE did not significantly differ compared to those before VR-CE. Patients described a pronounced sense of presence and only mild symptoms of cybersickness. Craving was significantly correlated with cybersickness. While positive affect decreased throughout the VR exposure, negative affect did not differ significantly in pre-post-comparisons. This study shows that craving induction through our VR-CE paradigm is feasible and well-tolerated by patients with AD in long-term rehabilitation. These results contribute to the development and future research of therapeutic VR-CE approaches.}, subject = {Alkoholismus}, language = {en} } @misc{StanikDoehringReesetal.2025, author = {Stanik, Eva and D{\"o}hring, Thorsten and Rees, Paul and Kroneberger, Monika and Stanik, Martin}, title = {Infrared heating for a sustainable powder coating technology}, volume = {2025}, publisher = {DGaO}, organization = {TH Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {The recent energy crisis revealed the dependence of many manufacturing companies on fossil fuels Industrial processes need to be transformed into sustainable alternatives For powder coatings, which traditionally rely on gas or oil heating systems, infrared radiation can deliver the required process heat The strong dependence of the IR absorption on the geometry of the irradiated parts as well as on the color and sort of the coating powder has to be considered before the implementation of this innovative heating The aim of the NAPUBEST project (German abbreviation for Nachhaltige Pulverbeschichtungs Technologie which means "Sustainable Powder Coating Technology") is to get a better understanding of these correlations In our laboratory, we realized a prototype of an IR oven for test measurements The high reflectivity of silver coated reflector sheets facilitates the concentration of infrared radiation inside the oven. On the other hand, the absorption of powder coated samples in different paint colors has an impact on the heating efficiency First tests of the equipment and measurements of the angular dependence of the reflectivity of various coated samples are presented.}, subject = {Infrarotheizung}, language = {en} } @inproceedings{HudecStieglitzDoehringetal.2025, author = {Hudec, Rene and Stieglitz, Veronika and D{\"o}hring, Thorsten and Friedrich, Peter and Burwitz, Vadim}, title = {Novel X-ray optics developed within the AHEAD2020 project}, publisher = {DGaO}, organization = {TH Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {We present a summary of our contribution to the EU Horizon 2020 project AHEAD2020, with emphasis on the X-ray optics work package. The Czech Technical University - together with other collaborating institutes - studied innovative Lobster Eye (LE) and Kirkpatrick-Baez (KB) X-ray modules, based on the Multi Foil Optics technology (MFO). In addition, two major events were organized, namely a students workshop in December 2023 and a summer school in May 2024. The KB optics represents a promising and cost effective alternative to the currently used Wolter I telescopes. The LE X-ray optics, based on the Schmidt design, has a wide field of view (FOV) with a short focal length, making it suitable for CubeSat application. Thereby the 2D LE optics consist of two orthogonal sub-modules of flat smooth reflecting foils, each sub-modules focuses in one direction. The advantage of such optics is that it preserves the angular resolution throughout the FOV even for off-axis points, as demonstrated by simulations and measurements. There was a collaboration with Aschaffenburg University in design, development, and testing of the double LE module HORUS, comparing different reflecting coatings.}, subject = {R{\"o}ntgenoptik}, language = {en} } @misc{DoehringPreglerKrivanekovaetal.2025, author = {D{\"o}hring, Thorsten and Pregler, Jan and Krivanekova, Lucia and Hildenbrand, Georg}, title = {Strahlungsmessungen beim Erstflug des Stratosph{\"a}renballon-Experiments ASTRABAX}, series = {DGaO-Proceedings}, volume = {2025}, journal = {DGaO-Proceedings}, number = {126}, publisher = {DGaO}, organization = {TH Aschaffenburg}, pages = {1 -- 2}, year = {2025}, abstract = {Mit dem Aschaffenburger Stratosph{\"a}ren-Ballon-Experiment („ASTRABAX") werden Experimente zu Material- und Biowissenschaften unter extremer Strahlungsexposition in großer H{\"o}he durchgef{\"u}hrt. Der erste von drei geplanten Ballonfl{\"u}gen startete Mitte Oktober 2024 im norddeutschen Bad Pyrmont und erreichte eine Flugh{\"o}he von fast 35 km. Der Schwerpunkt der physikalischen Experimente lag auf der Vermessung des UV-C-Spektralbereichs mit einem Miniatur-UV-VIS-Spektrometer und der Strahlungsdosimetrie mit einem Geigerz{\"a}hler. In einem zweiten Satz von Experimenten wurde die Wirkung der Bestrahlung auf Polydopaminproben untersucht, welche derzeit f{\"u}r Beschichtungen von astronomischen R{\"o}ntgenspiegel entwickelt werden. Die Ballongondel enthielt auch Proben biologischer Zellen, die hier gleichzeitig einer niedrig dosierten Strahlung von hochenergetischen Partikeln, Gammastrahlen und UV-Strahlung ausgesetzt wurden. Experimente unter solchen nat{\"u}rlichen stratosph{\"a}rischen Bedingungen sind f{\"u}r atmosph{\"a}rische H{\"o}henfl{\"u}ge, bemannte Raumfahrtmissionen, vergleichbare Expositionen bei anderen Objekten des Sonnensystems und die strahlenbiologische Forschung von Bedeutung.}, subject = {Stratosph{\"a}ren-Ballon}, language = {de} } @inproceedings{StanikPreglerDoehringetal.2025, author = {Stanik, Eva and Pregler, Jan and D{\"o}hring, Thorsten and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {A visitor experiment on astronomical x-ray optics for the "Deutsches R{\"o}ntgenmuseum"}, series = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, volume = {2025}, booktitle = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, number = {13531}, editor = {Hudec, Ren{\´e} and Pina, Ladislav}, publisher = {SPIE}, doi = {10.1117/12.3056291}, pages = {135310M-1 -- 135310M-7}, year = {2025}, abstract = {The "Deutsches R{\"o}ntgen-Museum" in Remscheid (Germany) is the unique institution worldwide that researches and documents the life and work of the first Nobel Prize winner in physics, Wilhelm Conrad R{\"o}ntgen, and the effects of his discovery of X-rays. As an integral part of the museum, the R{\"o}Lab laboratory offers visitors the opportunity to gain practical experience in X-rays, optics and technology through own experiments. As part of a joint development project, students from Aschaffenburg University of Applied Sciences are currently designing a visitor experiment on astronomical X-ray optics for the museum´s R{\"o}ntgen laboratory. An optical set-up with visible light illustrates the focusing principle of X-ray telescopes, e. g. for wide-angle optics based on the lobster-eye principle. Display boards explain the optics of various types of telescopes with accompanying text and corresponding illustrations. Modern X-ray observatories such as CHANDRA, XMM-Newton and eROSITA are presented clearly. Once implemented, the new visitor experiment inside the "Deutsches R{\"o}ntgen-Museum" aims to inspire young researchers with enthusiasm for the fascinating world of X-ray optics and X-ray astronomy.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {en} } @incollection{DeBlockHeubergerVilainetal.2023, author = {De Block, Jos and Heuberger, Matthias and Vilain, Michael and Schulz, Carmen}, title = {Keep it small - keep it simple: Netzwerke, Technik und Pflege. Was wir aus dem Buurtzorg-Modell lernen k{\"o}nnen}, series = {Schatten der Zukunft - wie Megatrends die Sozial- und Gesundheitswirtschaft ver{\"a}ndern}, booktitle = {Schatten der Zukunft - wie Megatrends die Sozial- und Gesundheitswirtschaft ver{\"a}ndern}, publisher = {Nomos Verlag}, address = {Baden-Baden}, pages = {77 -- 89}, year = {2023}, subject = {Nonprofit-Organisation}, language = {de} } @incollection{VilainHeuberger2024, author = {Vilain, Michael and Heuberger, Matthias}, title = {Netzwerkforschung: Neue Perspektiven zur Analyse und Beschreibung von Engagement}, series = {Zivilgesellschaftliches Engagement und Freiwilligendienste}, booktitle = {Zivilgesellschaftliches Engagement und Freiwilligendienste}, publisher = {Nomos Verlag}, address = {Baden-Baden}, pages = {849 -- 857}, year = {2024}, subject = {Ehrenamtliche T{\"a}tigkeit}, language = {de} } @misc{KronebergerStanikDoehring2025, author = {Kroneberger, Monika and Stanik, Eva and D{\"o}hring, Thorsten}, title = {Optik-Simulation f{\"u}r die Energiewende am Beispiel eines industriellen Infrarot-Heizofens}, series = {DGaO Proceedings, 126. Tagung}, journal = {DGaO Proceedings, 126. Tagung}, publisher = {DGaO}, organization = {DigitX}, pages = {1 -- 1}, year = {2025}, abstract = {Im Rahmen der Energiewende sollen fossile Brennstoffe auch im Heizofen einer industriellen Pulverlackbeschichtung ersetzt werden. In der Stahlindustrie ist die Infrarottrocknung von ebenen Stahlband-Oberfl{\"a}chen ein bereits seit Jahren bew{\"a}hrtes Verfahren. Pulverlack-Beschichtungen werden jedoch oft auf komplexe Geometrien aufgetragen, bei denen eine Verschattung die Effizienz der Infrarot-Aush{\"a}rtung mindert. Die Anordnung der Infrarotstrahler in der reflektierenden Heizkammer, deren Geometrie und die Verweilzeit der Bauteile sind daher die Schl{\"u}ssel f{\"u}r erfolgreiche Prozesse. Zur Verfahrensoptimierung m{\"u}ssen zudem die optischen Parameter der Pulverlacke w{\"a}hrend des Prozesses bekannt sein, um die n{\"o}tige Strahlungsleistung an Bauteile und unterschiedliche Lacke anpassen zu k{\"o}nnen. Messungen in der NAPUBEST-Prototypanlage werden daher mit optischen Simulationen des Aufbaus abgeglichen, um die Simulationsparameter an die Messergebnisse anzupassen und damit die Grundlage f{\"u}r die Auslegung von industriellen Prozessen zu gew{\"a}hrleisten. Hierbei wird Infrarotstrahlung mehrerer Wellenl{\"a}ngen ber{\"u}cksichtigt, um in unterschiedlichen Ofenzonen ben{\"o}tigte Aufheiz- und Haltephasen zu verwirklichen.}, subject = {Infrarotheizung}, language = {de} } @inproceedings{KhropostRiethmuellerDoehringetal.2025, author = {Khropost, Diana and Riethm{\"u}ller, Franziska and D{\"o}hring, Thorsten and Flachs, Dennis and H{\"u}lag{\"u}, Deniz and Hertwig, Andreas and Cotroneo, Vincenzo and Gibertini, Eugenio}, title = {Polydopamine: a bio-inspired polymer for X-ray mirror coatings and other technical applications}, series = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, volume = {2025}, booktitle = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, number = {13531}, editor = {Hudec, Ren{\´e} and Pina, Ladislav}, publisher = {SPIE}, doi = {10.1117/12.3056298}, pages = {135310H-1 -- 135310H-11}, year = {2025}, abstract = {Although the organic molecule dopamine (3,4-dihydroxyphenethylamine) is commonly known as one of the "hormones of happiness", thin polymer films of polydopamine (PDA) also have interesting technical properties. PDA is a very strong glue that sticks on almost everything, even under water. In nature, PDA is found in the byssal thread cuticles of mussels. When produced by dip-coating, the self-organizing PDA layers grow in a reproducible thickness of single or multiple molecule monolayers of a few nanometres thickness only. Here we present an optimized preparation regime as derived from polymerization analysis through absorption spectroscopy. One application is the use of thin PDA overcoatings to increase the soft X-ray reflectivity of astronomical X-ray mirrors. Furthermore, we give an outlook to other technical applications for this interesting material, presenting this bio-inspired organic polymer as an innovative technical solution for the future, with applications such as PDA-based super-capacitors and its promising role in enhancing separator materials for batteries.}, subject = {R{\"o}ntgenspiegel}, language = {en} } @inproceedings{DoehringKrivanekovaPregleretal.2025, author = {D{\"o}hring, Thorsten and Krivanekova, Lucia and Pregler, Jan and Hildenbrand, Georg}, title = {Radiation measurements in the stratosphere by the balloon experiment ASTRABAX}, series = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, volume = {2025}, booktitle = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, number = {13531}, editor = {Hudec, Ren{\´e} and Pina, Ladislav}, publisher = {SPIE}, doi = {10.1117/12.3056175}, pages = {1353109-1 -- 1353109-11}, year = {2025}, abstract = {Stratospheric balloons are a platform of choice for meteorology, climate and atmospheric research, offering some advantages over sounding rockets and satellites. The Aschaffenburg Stratospheric Balloon Experiment (ASTRABAX) carries out experiments on material treatments and life sciences under the extreme radiation exposures at high altitude. The pioneer ASTRABAX flight took place mid of October 2024 in Germany. Measurements examined the UV spectral region by a miniature spectrometer and captured secondary cosmic rays employing a Geiger counter. Additional experiments assessed irradiation effects on polydopamine X-ray mirror coatings. The platform also carried samples of biological cells to evaluate effects of exposure to low-dose irradiation of high-energy particles, gamma rays and UV radiation simultaneously. Biological experiments under such realistic conditions are relevant for genetic research on Earth, for human space flights as well as for the understanding of astrobiological processes.}, subject = {Stratosph{\"a}ren-Ballon}, language = {en} } @inproceedings{ManzAbkeHagel2025, author = {Manz, Julian and Abke, J{\"o}rg and Hagel, Georg}, title = {Automated Tracking of User Interactions in Web-Based Adaptive Learning for Software Engineering}, series = {ECSEE '25: Proceedings of the 6th European Conference on Software Engineering Education}, booktitle = {ECSEE '25: Proceedings of the 6th European Conference on Software Engineering Education}, editor = {Mottok, J{\"u}rgen and Hagel, Georg}, publisher = {Association for Computing Machinery}, address = {New York, NY, USA}, isbn = {979-8-4007-1282-1}, doi = {10.1145/3723010.3723020}, pages = {180 -- 184}, year = {2025}, abstract = {This paper explores the automation of generating and dispatching Experience API (xAPI) statements for comprehensive tracking of user interactions in e-learning environments. It introduces the react-xapi-wrapper library, an extension of the xAPI JavaScript library designed for use in web applications. Key aspects discussed include the library's features, its integration into a web-based adaptive learning system (ALS) for software engineering, and the custom verbs used. The goal is to reduce implementation effort for tutors and developers while taking advantage of xAPI's interoperability, scalability, and ability to track student learning activities and behaviors, laying the foundation for more responsive and personalized learning experiences.}, subject = {Computerunterst{\"u}tztes Lernen}, language = {en} } @inproceedings{MichaelValenciaUsmeAbke2025, author = {Michael, M{\"u}nch and Valencia Usme, Yeimy Paola and Abke, J{\"o}rg}, title = {Prototypical Implementation of a Domain Model for an Adaptive Learning System}, series = {Proceedings of the 6th European Conference on Software Engineering Education}, volume = {2025}, booktitle = {Proceedings of the 6th European Conference on Software Engineering Education}, number = {ECSEE '25: Proceedings of the 6th European Conference on Software Engineering Education}, editor = {Mottok, J{\"u}rgen and Hagel, Georg}, doi = {https://dl.acm.org/doi/pdf/10.1145/3723010.3723030}, pages = {190 -- 194}, year = {2025}, abstract = {The goal of this paper is to present the concept and implementation of a Domain Model for an adaptive learning system (ALS) as a defined framework. The ALS is developed in a research setting. In this study, a proposition for a Domain Model based on Experience API (xAPI) protocol within a Learning Record Store (LRS) is outlined. The target is to collect and analyze student data using xAPI statements, such as average working time and learning elements (LEs) interacted with, in order to gain insights into student behavior and learning processes. The aim of this study is to develop and provide a conceptual model using xAPI and LRS in an ALS setting, an architecture that improves the flexibility of developing adaptive learning systems, enabling the creation of personalized learning experiences for a wide range of users and use cases. The combination of xAPI and LRS allows the definition of a precise Domain Model and provides contextualized and structured data. Moreover, xAPI enables the transformation of the inherent complexity of the Domain Model into something understandable and actionable, facilitating deeper analysis of learning experiences. This paper demonstrates how the proposed Domain Model can effectively represent student activities, interactions, and learning outcomes within a defined framework. The expectation is that diverse types of learners, as well as developers and researchers in educational technologies, will benefit from the use of the Domain Model in a learning environment. Here the learner's preferences are diagnosed, and then user interfaces are customized in an adaptive manner to accommodate the preferences. The main task of the Domain Model is to provide data for the adaptive components of the adaptive learning system.}, subject = {Computerunterst{\"u}tztes Lernen}, language = {en} } @incollection{StanikStollenwerkHuebneretal.2025, author = {Stanik, Eva and Stollenwerk, Manfred and H{\"u}bner, Sophie and Stadtm{\"u}ller, Johannes and D{\"o}hring, Thorsten}, title = {Experimental studies on iridium catalysts for water PEM electrolysis}, series = {MaterialsWeek 2025 - Book of Abstracts}, booktitle = {MaterialsWeek 2025 - Book of Abstracts}, publisher = {Deutsche Gesellschaft f{\"u}r Materialkunde e.V. (DGM)}, address = {Sankt Augustin}, isbn = {978-3-88355-446-4}, pages = {62 -- 62}, year = {2025}, abstract = {The enhanced use of sustainable energy sources entails strong fluctuations in the availability of electric power. As we need new approaches for energy distribution and energy storage systems, hydrogen is often discussed as a promising energy carrier. PEM electrolysis can be used to transform electrical energy from renewable sources into hydrogen. One challenge in this context is the need for catalysts, as these contribute significantly to the performance of the electrolysis cell. The commonly used platinum group metal (PGM) catalysts like Iridium are quite scarce and therefore expensive. A possible approach to reduce the Ir content is the application of magnetron sputtering for catalyst generation. By selecting the right process parameters, the desired layer properties can be set very precisely during sputtering. This ensures a large surface area with reduced material usage. The introduction of carbon can increase the surface area of the catalyst further and enhance its effectiveness. First results of investigations on the catalytic effect of sputtered Ir catalyst layers will be presented.}, subject = {Iridium}, language = {en} } @incollection{KhropostRiethmuellerStaniketal.2025, author = {Khropost, Diana and Riethm{\"u}ller, Franziska and Stanik, Eva and D{\"o}hring, Thorsten and Hertwig, Andreas and Huelague, Deniz}, title = {Polydopamine - a bionic material and its potential applications for batteries}, series = {MaterialsWeek 2025 - Book of Abstracts}, booktitle = {MaterialsWeek 2025 - Book of Abstracts}, publisher = {Deutsche Gesellschaft f{\"u}r Materialkunde e.V. (DGM)}, address = {Sankt Augustin}, isbn = {978-3-88355-446-4}, pages = {67 -- 67}, year = {2025}, abstract = {Polydopamine (PDA) recently came into focus as an innovative material for applications in various technical fields, especially in the energy field it is considered for batteries as well as for supercapacitors. It is a very strong glue that sticks on almost everything, even under water: In nature, PDA is found in the byssal thread cuticles of mussels. The wet-resistant adhesion ability of PDA can be used in the treatment of separator membranes in batteries, but furthermore PDA is also considered as an electrode material for batteries. We have investigated thin layers of poly-dopamine with different methods including ellipsometry, tactile measurements of the layer thickness and in situ absorption measurements during the polymerization process.}, subject = {Iridium}, language = {en} } @incollection{WisselFreudenmannPerezetal.2025, author = {Wissel, Julian and Freudenmann, Dominic and Perez, Nicolas and D{\"o}hring, Thorsten and Stadtm{\"u}ller, Johannes and Stollenwerk, Manfred}, title = {Various highly effective sputtered layer structures as catalysts for H2O2 decomposition for use in satellite engines}, series = {MaterialsWeek 2025 - Book of Abstracts}, booktitle = {MaterialsWeek 2025 - Book of Abstracts}, publisher = {Deutsche Gesellschaft f{\"u}r Materialkunde e.V. (DGM)}, address = {Sankt Augustin}, isbn = {978-3-88355-446-4}, pages = {53 -- 53}, year = {2025}, abstract = {Catalysts are frequently employed in both research and industrial applications to facilitate or accelerate chemical reactions. One such application is in monopropellant thrusters for space propulsion systems, where hydrogen peroxide (H2O2) is used as a liquid propellant. The decomposition of liquid hydrogen peroxide into water and oxygen gas, which ultimately generates thrust, can be achieved using noble metal catalysts from the platinoid group, such as platinum and iridium. This promotes the use of more environmentally friendly and less toxic propellants, such as H2O2, instead of hydrazine and nitrogen tetroxide (NTO). The optimization of coating structures with these catalytic materials is essential for future space applications, as it aims to extend the lifespan of catalyst materials and results in a better utilization of H2O2 in satellite engines. Therefore, different layer structures were deposited onto Duranit D99 pellets using a controlled magnetron sputtering process. Previous studies have shown that the used sputtering pressure has a strong influence on the structure of the deposited coatings [2][3]. Certain parameter combinations produce catalytic layers with rough textures and a highly porous microstructure, see figure 1 [1]. To improve the thermal and mechanical stability of the sputtered layers, thin adhesive layers of Titanium and Zirconium were applied beneath the catalytic layer. The pellets were then heated in an oven at 640°C for one minute to simulate the thermal effects experienced in a satellite engine during ignition. Following this, the catalytic performance of the pellets was tested in laboratory experiments using 30\% H2O2. Pellets with sputtered platinum as the catalytic coating delivered the best results. These coatings will be further evaluated in an engine test conducted at the German Aerospace Centre (DLR). Hydrogen peroxide is also expected to play a crucial role in future lunar and Martian colonization efforts. In this context, catalytic coatings would be used to decompose H2O2 to supply astronauts with water and oxygen, rather than to generate thrust in satellite engines.}, subject = {Satellitentechnik}, language = {en} } @article{ObmannMuenchGrafetal.2025, author = {Obmann, Dirk and M{\"u}nch, Philipp and Graf, Bernhard and von Jouanne-Diedrich, Holger and Zausig, York A.}, title = {Comparison of different AI systems for diagnosing sepsis, septic shock, and cardiogenic shock: a retrospective study}, series = {Scientific reports}, volume = {2025}, journal = {Scientific reports}, number = {15}, doi = {doi.org/10.1038/s41598-025-00830-9}, pages = {1 -- 10}, year = {2025}, abstract = {Sepsis, septic shock, and cardiogenic shock are life-threatening conditions associated with high mortality rates, but differentiating them is complex because they share certain symptoms. Using the Medical Information Mart for Intensive Care (MIMIC)-III database and artificial intelligence (AI), we aimed to increase diagnostic precision, focusing on Bayesian network classifiers (BNCs) and comparing them with other AI methods. Data from 5970 adults, including 950 patients with cardiogenic shock, 1946 patients with septic shock, and 3074 patients with sepsis, were extracted for this study. Of the original 51 variables included in the data records, 12 were selected for constructing the predictive model. The data were divided into training and validation sets at an 80:20 ratio, and the performance of the BNCs was evaluated and compared with that of other AI models, such as the one rule classifier (OneR), classification and regression tree (CART), and an artificial neural network (ANN), in terms of accuracy, sensitivity, specificity, precision, and F1-score. The BNCs exhibited an accuracy of 87.6\% to 91.5\%. The CART model demonstrated a notable 91.6\% accuracy when only three decision levels were used, whereas the intricate ANN model reached 90.5\% accuracy. Both the BNCs and the CART model allowed clear interpretation of the predictions. BNCs have the potential to be valuable tools in diagnostic tasks, with an accuracy, sensitivity, and precision comparable, in some cases, to those of ANNs while demonstrating superior interpretability.}, subject = {K{\"u}nstliche Intelligenz}, language = {en} } @article{CibaPetzoldAlvesetal.2025, author = {Ciba, Manuel and Petzold, Marc and Alves, Caroline L. and Rodrigues, Francisco A. and Jimbo, Yasuhiko and Thielemann, Christiane}, title = {Machine learning and complex network analysis of drug effects on neuronal microelectrode biosensor data}, series = {Scientific Reports}, volume = {15}, journal = {Scientific Reports}, number = {1}, publisher = {Springer Science and Business Media LLC}, issn = {2045-2322}, doi = {https://doi.org/10.1038/s41598-025-99479-7}, year = {2025}, abstract = {Biosensors, such as microelectrode arrays that record in vitro neuronal activity, provide powerful platforms for studying neuroactive substances. This study presents a machine learning workflow to analyze drug-induced changes in neuronal biosensor data using complex network measures from graph theory. Microelectrode array recordings of neuronal networks exposed to bicuculline, a GABA \$\$_A\$\$ receptor antagonist known to induce hypersynchrony, demonstrated the workflow's ability to detect and characterize pharmacological effects. The workflow integrates network-based features with synchrony, optimizing preprocessing parameters, including spike train bin sizes, segmentation window sizes, and correlation methods. It achieved high classification accuracy (AUC up to 90\%) and used Shapley Additive Explanations to interpret feature importance rankings. Significant reductions in network complexity and segregation, hallmarks of epileptiform activity induced by bicuculline, were revealed. While bicuculline's effects are well established, this framework is designed to be broadly applicable for detecting both strong and subtle network alterations induced by neuroactive compounds. The results demonstrate the potential of this methodology for advancing biosensor applications in neuropharmacology and drug discovery.}, subject = {Maschinelles Lernen}, language = {en} } @inproceedings{HufgardMayerSchroederetal.2025, author = {Hufgard, Simone and Mayer, Margot and Schroeder, Insa S. and Thielemann, Christiane}, title = {3D compartmentilisation for analyzing functional long-range connectivity between brain regions}, series = {4th Microphysiological Systems World Summit, Brussels, Belgium}, booktitle = {4th Microphysiological Systems World Summit, Brussels, Belgium}, number = {June 2025}, year = {2025}, subject = {Hirnareal}, language = {en} } @inproceedings{StanikPreglerDoehringetal.2025, author = {Stanik, Eva and Pregler, Jan and D{\"o}hring, Thorsten and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {A visitor experiment on astronomical X-ray optics for the "Deutsches R{\"o}ntgen Museum"}, series = {Proceedings of SPIE}, volume = {2025}, booktitle = {Proceedings of SPIE}, number = {13531}, publisher = {SPIE}, organization = {Technische Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {The "Deutsches R{\"o}ntgen Museum" in Remscheid is the unique institution worldwide that researches and documents the life and work of the first Nobel Prize winner in physics, Wilhelm Conrad R{\"o}ntgen and the effects of his discovery of X rays. As an integral part of the museum, the R{\"o}Lab laboratory offers visitors the opportunity to gain practical experience in X rays, optics and technology through own experiments. As part of a joint development project, students from Aschaffenburg University of Applied Sciences are currently designing a visitor experiment on astronomical X ray optics for the museum laboratory.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {en} } @inproceedings{StanikDoehringKrivanekovaetal.2025, author = {Stanik, Eva and D{\"o}hring, Thorsten and Krivanekova, Lucia and Meißner, Martin}, title = {„Zirkus UNI-versum" - ein Astronomie-Event f{\"u}r Schulklassen}, series = {Bayerischer Tag f{\"u}r gute Lehre}, volume = {2025}, booktitle = {Bayerischer Tag f{\"u}r gute Lehre}, publisher = {Universit{\"a}t W{\"u}rzburg}, organization = {Techniche Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {Im "Wissenschaftsjahr 2023 - Unser Universum", einer gemeinsamen Initiative des Bundesministeriums f{\"u}r Bildung und Forschung (BMBF) und Wissenschaft im Dialog (WiD), wurden zahlreiche Projekte in ganz Deutschland gef{\"o}rdert. Eines dieser Projekte war der "Zirkus UNI-versum", der an der Technischen Hochschule Aschaffenburg stattfand. Zielgruppe waren Schulklassen von benachbarten Schulen, die eingeladen wurden, bei einem Besuch auf dem Hochschul-Campus spielerisch Wissen {\"u}ber Astronomie und Raumfahrt zu sammeln. Gleichzeitig sollen mit dem Projekt (und anderen „Erlebnis-Bausteinen" unserer Schulprojekte) die Sch{\"u}lerinnen und Sch{\"u}ler f{\"u}r MINT-F{\"a}cher begeistert und zuk{\"u}nftige Studierende f{\"u}r technische Studieng{\"a}nge gewonnen werden.}, subject = {Astronomie}, language = {de} } @inproceedings{DoehringStanikPregleretal.2025, author = {D{\"o}hring, Thorsten and Stanik, Eva and Pregler, Jan and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {Konzeption eines Astronomie-Besucherexperiments f{\"u}r das Deutsche R{\"o}ntgen Museum}, series = {Bayerischer Tag f{\"u}r gute Lehre}, volume = {2025}, booktitle = {Bayerischer Tag f{\"u}r gute Lehre}, publisher = {Universit{\"a}t W{\"u}rzburg}, organization = {Technische Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {Das Deutsche R{\"o}ntgen Museum in Remscheid ist eine weltweit einzigartige Institution, die das Leben und Werk des ersten Physik Nobelpreistr{\"a}gers Wilhelm Conrad R{\"o}ntgen und die Auswirkungen seiner Entdeckung der R{\"o}ntgenstrahlung erforscht und dokumentiert Als integraler Bestandteil des Museums bietet das Museumslabor R{\"o}Lab die M{\"o}glichkeit, durch eigene Experimente praktische Erfahrungen zu verschiedenen Themen rund um R{\"o}ntgenstrahlung, Optik und Technik zu sammeln Im Rahmen eines gemeinsamen Entwicklungsprojekts konzipieren Studierende der TH Aschaffenburg derzeit ein Besucherexperiment zur astronomischen R{\"o}ntgenoptik f{\"u}r das Museumslabor Das neue Besucherexperiment soll nach seiner Realisierung junge Forscherinnen und Forscher f{\"u}r die faszinierende Welt der R{\"o}ntgenoptik und der R{\"o}ntgenastronomie begeistern.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {de} } @inproceedings{DoehringKriegerStanik2025, author = {D{\"o}hring, Thorsten and Krieger, Jochen and Stanik, Eva}, title = {Praxisschock im Studium - die Erstellung komplexer Angebote f{\"u}r Satellitenkomponenten}, series = {Bayerischer Tag f{\"u}r gute Lehre}, volume = {2025}, booktitle = {Bayerischer Tag f{\"u}r gute Lehre}, publisher = {Universit{\"a}t W{\"u}rzburg}, organization = {Technische Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {Die Lehrveranstaltung „Projektstudie" im Rahmen des Studiengangs "Internationales Technisches Vertriebsmanagement" verbindet Elemente der Ingenieurwissenschaften und der Betriebswirtschaftslehre mit einem realistischen Vertriebsprojekt, hier der Erstellung eines komplexen Angebotes f{\"u}r Satellitenkomponenten. Begleitend zu der Teamarbeit am praktischen Vertriebsprojekt werden Lehrsequenzen theoretischer Natur durchgef{\"u}hrt, die dem nachhaltigen Verst{\"a}ndnis dienen und auf die Schwerpunktthemen vorbereiten. Die hohe Qualit{\"a}t der erstellten Angebotsunterlagen zeigt, dass die angestrebten Lernziele erreicht wurden. Der Praxisschock einer komplexen Angebotserstellung erfolgt f{\"u}r die Studierenden somit bereits im Studium unter Anleitung eines auf diesem Gebiet berufserfahrenen Professors und nicht erst w{\"a}hrend der Probezeit in einer ersten Vertriebsposition.}, subject = {Investitionsg{\"u}termarketing}, language = {de} } @article{DoehringStanikZeisingetal.2025, author = {D{\"o}hring, Thorsten and Stanik, Eva and Zeising, Sebastian and Meissner, Martin}, title = {Astronomy events at Aschaffenburg University to attract future students}, series = {Acta Polytecnica}, volume = {2025}, journal = {Acta Polytecnica}, number = {65 (1)}, pages = {1 -- 6}, year = {2025}, abstract = {In 2023, the German Federal Ministry of Education and Research and the German organisation for science communication "Wissenschaft im Dialog" jointly proclaimed a "Science Year 2023" in Germany with the motto "Our Universe". One of the numerous events that have been supported has been that of the project "Zirkus UNI-versum", which took place in summer 2023 at Aschaffenburg University of Applied Sciences. This project, and other activities for schools, intend to stimulate the interest of pupils in STEM subjects and to attract future engineering students.}, subject = {Astronomie}, language = {en} } @incollection{RoetzelKokottSchuhmacher2025, author = {R{\"o}tzel, Peter and Kokott, Peter and Schuhmacher, Marcel}, title = {Risikoorientierte Management Control Systems im Beschaffungsmanagement von kleinen und mittelst{\"a}ndischen Unternehmen}, series = {Management von Risiko, Nachhaltigkeit und KI in der Beschaffung}, booktitle = {Management von Risiko, Nachhaltigkeit und KI in der Beschaffung}, pages = {73 -- 95}, year = {2025}, abstract = {Megatrend Klimawandel, Krisen und regulatorische Vorgaben wie das Lieferkettensorgfaltspflichtengesetz (LkSG) haben in den letzten Jahren enorme Herausforderungen f{\"u}r Unternehmen generiert. Unternehmen sehen sich einem steigenden Steuerungsbedarf im Bereich Risikomanagement und Beschaffung gegen{\"u}ber. Ein geeignetes Instrument im strategischen und operativen Controlling ist hierf{\"u}r ein risikoorientiertes Management Control System. Dar{\"u}ber hinaus macht das LkSG Vorgaben f{\"u}r die Ausgestaltung eines Risikomanagements. Insbesondere die Ausgestaltung der Lieferketten und des Risikomanagements mussten neu gedacht und strategisch eingebunden werden. Daneben zeigen sich auch zunehmend Nachhaltigkeitsimplikationen auf das Working Capital Management in Unternehmen. Insbesondere das LkSG wirkt zunehmend auf unternehmerische Entscheidungen und f{\"u}hrt zu Trade-offs zwischen Compliance, Nachhaltigkeit und Profitabilit{\"a}t. Hier k{\"o}nnen Sustainability Control Systems eine wichtige Rolle spielen, die im Vergleich mit klassischen Management Control Systems Nachhaltigkeitsaspekte inkludieren}, subject = {Risikomanagement}, language = {de} } @techreport{Jost2025, type = {Working Paper}, author = {Jost, Thomas}, title = {Preisstabilit{\"a}t in Deutschland in Zeiten von D-Mark und Euro}, series = {Weidener Diskussionspapiere}, journal = {Weidener Diskussionspapiere}, pages = {14}, year = {2025}, abstract = {Mit der Abschaffung der D-Mark und der Einf{\"u}hrung des Euro waren Hoffnungen verbunden, aber auch Bef{\"u}rchtungen, dass die neue W{\"a}hrung nicht so stabil wie die D-Mark sein k{\"o}nnte. Die D-Mark geh{\"o}rte international {\"u}ber 50 Jahre zu den zwei W{\"a}hrungen mit den niedrigsten Inflationsraten. In diesem Beitrag wird die Entwicklung der Preise und der Kaufkraft in Deutschland in zwei gleich langen Perioden vor und nach der Euro-Einf{\"u}hrung verglichen. Der Euro weist dabei sogar geringere durchschnittliche Inflationsraten, gemessen an den Verbraucherpreisen in Deutschland, als die D-Mark auf. In den Jahren 1999 bis 2020 herrschte weltweit ein g{\"u}nstigeres Inflationsumfeld, was es auch der Europ{\"a}ischen Zentralbank (EZB) leichter machte, ihr Preisstabilit{\"a}tsziel zu verfolgen. Die ersten schweren Herausforderungen ergaben sich f{\"u}r die EZB seit 2021, als die Inflationsrate aufgrund negativer Angebotsschocks und einer beispiellosen Fiskalexpansion auf {\"u}ber 10\% anstieg. Die Deutsche Bundesbank konnte in {\"a}hnlichen Krisen in den 1970er Jahren mit einer konsequenten Stabilit{\"a}tspolitik den Preisauftrieb deutlich st{\"a}rker und nachhaltiger bek{\"a}mpfen als die meisten anderen L{\"a}nder. Ein Erfolg, zu dem auch ihr hoher Grad der Unabh{\"a}ngigkeit von der Politik beitrug. Ob dies der EZB gelingt, bleibt abzuwarten. Anfang 2025 liegt die Inflationsrate im Euroraum und in Deutschland trotz einer tiefgreifenden Konjunkturschw{\"a}che mit 2,5\% noch immer {\"u}ber dem Inflationsziel von 2\%.}, subject = {Europ{\"a}ische Zentralbank}, language = {de} } @article{SallumAlvesdeOToutainetal.2025, author = {Sallum, Loriz Francisco and Alves, Caroline L. and de O Toutain, Thaise Graziele L and Porto, Joel Augusto Moura and Thielemann, Christiane and Rodrigues, Francisco A.}, title = {Revealing patterns in major depressive disorder with machine learning and networks}, series = {Chaos, Solitons \& Fractals}, volume = {194}, journal = {Chaos, Solitons \& Fractals}, publisher = {Elsevier BV}, issn = {0960-0779}, doi = {https://doi.org/10.1016/j.chaos.2025.116163}, year = {2025}, abstract = {Major depressive disorder (MDD) is a multifaceted condition that affects millions of people worldwide and is a leading cause of disability. There is an urgent need for an automated and objective method to detect MDD due to the limitations of traditional diagnostic approaches. In this paper, we propose a methodology based on machine and deep learning to classify patients with MDD and identify altered functional connectivity patterns from EEG data. We compare several connectivity metrics and machine learning algorithms. Complex network measures are used to identify structural brain abnormalities in MDD. Using Spearman correlation for network construction and the SVM classifier, we verify that it is possible to identify MDD patients with high accuracy, exceeding literature results. The SHAP (SHAPley Additive Explanations) summary plot highlights the importance of C4-F8 connections and also reveals dysfunction in certain brain areas and hyperconnectivity in others. Despite the lower performance of the complex network measures for the classification problem, assortativity was found to be a promising biomarker. Our findings suggest that understanding and diagnosing MDD may be aided by the use of machine learning methods and complex networks.}, subject = {Depression}, language = {en} } @inproceedings{HaugSapsaiHocketal.2024, author = {Haug, Jim and Sapsai, Iryna and Hock, Isabell and Abke, J{\"o}rg and Hagel, Georg}, title = {EVALUATING AN AI-BASED ADAPTIVE LEARNING SYSTEM: GOALS, METHODS AND INITIAL RESULTS}, series = {16th International Conference on Education and New Learning Technologies, 1-3 July, 2024, Palma, Spain}, volume = {2024}, booktitle = {16th International Conference on Education and New Learning Technologies, 1-3 July, 2024, Palma, Spain}, number = {EDULEARN24 Proceedings}, editor = {Haug, Jim}, doi = {10.21125/edulearn.2024.0834}, pages = {3157 -- 3166}, year = {2024}, abstract = {The aim of this paper is to describe the evaluation process and findings of an AI-based Adaptive Learning System for the Computer Science discipline at two different German universities and discuss an array of methods in regard to assessing such a system. The primary objectives have been twofold: firstly, to examine the reception of selected learning elements, which were conceptually outlined based on relevant literature, among the student body; and secondly, to investigate the efficacy of individualized adaptive learning paths. These paths were generated by employing a variety of algorithms to analyze students learning style tendencies, with a particular emphasis on adaptive navigational techniques. The used algorithms encompassed a modified version of a literature based adaptive mechanism, an Ant-Colony-Algorithm and a Genetic Algorithm, alongside a lecturer-recommended learning path for a non-adaptive comparison. While the system suggested suitable learning paths based on student data, it never forced the individuals to give up their self-directed learning. The evaluation criteria revolved around the evolution of student motivation, interest levels, and knowledge acquisition during the time they spent working in the system. The evaluation sought to facilitate comparative analyses and assess algorithmic fitness for proficient learning path generation. The methods included both quantitative and qualitative approaches to gather data, seeking to strike a balance between being student-friendly and scientifically informative. They ranged from Likert Scale self-assessments to screen and video observations with retrospective interviews. Since the purpose of adaptive learning systems is intertwined with personalized learning it seems imperative to already take the preferences and opinions of students into account while the system is still in development. This complexity underscores the challenge of evaluating such systems, as significant constraints on student choice - though simplifying evaluation - directly oppose the ethos of individualized, self-directed learning. Initial findings suggest that the underlying theoretical considerations on sequencing and structuring of learning elements are confirmed, coupled with providing adequate flexibility to meet diverse learning needs. Cross-site evaluation of the literature-based learning elements indicated a high comprehensibility and positive student ratings. While significant positive trends were observed regarding knowledge acquisition, they cannot be definitively attributed to a specific method of learning path generation. Motivation and interest analyses show no significant differences among learning path types, albeit heavily limited by sample size. Similarly, emotion measurements, though limited, hint at positive impacts from HASKI system use. Despite limitations, early indications suggest student acceptance and potential effectiveness of learning paths, highlighting the need for larger sample sizes for validation and expansion. Ensuring alignment with student needs and user-friendly design are crucial considerations.}, subject = {E-Learning}, language = {en} } @article{SapsaiHaugAbkeetal.2024, author = {Sapsai, Iryna and Haug, Jim and Abke, J{\"o}rg and Hagel, Georg}, title = {IDENTIFYING STUDENT EMOTIONS IN AN ADAPTIVE LEARNING SYSTEM WITH A BAYESIAN NETWORK MODEL}, series = {IATED Digital Library Home}, volume = {2024}, journal = {IATED Digital Library Home}, number = {ICERI2024 Proceedings}, doi = {10.21125/iceri.2024.1192}, pages = {4829 -- 4837}, year = {2024}, abstract = {Analyzing scientific literature on the impact of emotions in e-learning highlights the importance of assessing students' emotional states and their role during online learning processes. This assessment often relies on physiological sensors, which may not be accessible to all institutions or acceptable to all students. Therefore, detecting students' emotional states in an online learning environment remains a complex challenge requiring a fundamental understanding of the role of emotions in such environments. This paper explores the potential benefits of using self-reported surveys to identify students' affective states and improve their learning experience by responding to specific emotional states during their learning progress. Our objectives include identifying emotional states through surveys, pinpointing frequently selected emotion-descriptive words, analyzing survey results, and developing a Bayesian Network (BN) model for automatic emotional state analysis. This BN model aims to facilitate real-time interactions within an adaptive learning system by autonomously assessing students' emotions without direct educator intervention. We present findings from an emotion identification survey conducted among engineering students in an e-learning course provided in an adaptive learning environment. Practically, we plan to implement the BN model within the aforementioned environment to interact with students through real-time pop-up messages, identifying and responding to their emotional states. Its generic character structure allows for changes in the set of analyzed words, ensuring its broad applicability. The challenges of identifying emotions during different online learning activities and the question of the optimal word selection remain for future exploration. Effective identification of students' emotional states is expected to enhance online learning, improving emotional well-being, motivation, and individual success.}, subject = {Bayes-Netz}, language = {en} } @article{ButzSeidl2025, author = {Butz-Seidl, Annemarie}, title = {G{\"u}terstandsschaukel als "Steuerfalle" - Vorteile nutzen und Fehler vermeiden}, series = {Erbfolgebesteuerung}, volume = {2025}, journal = {Erbfolgebesteuerung}, number = {03}, editor = {IWW Institut f{\"u}r Wissen in der Wirtschaft GmbH,}, pages = {57 -- 64}, year = {2025}, abstract = {Als G{\"u}terstandsschaukel wird die vorzeitige Beendigung des G{\"u}terstands der Zugewinngemeinschaft durch notarielle Beurkundung und die gleichzeitige Vereinbarung des G{\"u}terstands der G{\"u}tertrennung verstanden. In der gleichen notariellen Urkunde oder nach Verstreichen einer "Schamfrist" kann wieder der G{\"u}terstand der Zugewinngemeinschaft vereinbart und - bei Bedarf - wieder beendet werden - man "schaukelt" einmal weg vom G{\"u}terstand der Zugewinngemeinschaft und wieder zur{\"u}ck. Anhand von praxisrelevanten Fallgestaltungen will dieser Beitrag einen {\"U}berblick {\"u}ber die Vorteile und Risiken sowie die inhaltlichen Gestaltungsm{\"o}glichkeiten geben. Zudem wird der Frage nachgegangen, ob eine missgl{\"u}ckte G{\"u}terstandsschaukel "reparabel" ist.}, subject = {G{\"u}terstand}, language = {de} } @article{ButzSeidl2024, author = {Butz-Seidl, Annemarie}, title = {Liebhaberei im Umsatzsteuerrecht?}, series = {Gestaltende Steuerberatung}, volume = {2024}, journal = {Gestaltende Steuerberatung}, number = {09}, editor = {IWW Institut f{\"u}r Wissen in der Wirtschaft GmbH,}, pages = {327 -- 328}, year = {2024}, abstract = {Der Beitrag besch{\"a}ftigt sich mit der Problematik von dauerdefizit{\"a}ren T{\"a}tigkeiten und ihren Auswirkungen im Umsatzsteuerrecht.}, subject = {Umsatzsteuerrecht}, language = {de} } @article{SchleierEsenHellmann2025, author = {Schleier, Max and Esen, Cemal and Hellmann, Ralf}, title = {Vision transformer based cut interruption detection and prediction of laser fusion cutting from monitored melt pool images}, series = {Journal of Laser Applications}, volume = {37}, journal = {Journal of Laser Applications}, number = {1}, publisher = {Laser Institute of America}, issn = {1042-346X}, doi = {10.2351/7.0001611}, year = {2025}, abstract = {Incomplete cuts during laser fusion cutting result in a closed kerf, preventing the workpiece from detaching from the sheet and resulting in rework or rejection. We demonstrate the approach of a vision transformer, used for image classification, to detect cut interruption during laser fusion cutting in steel and aluminum. With events impending an incomplete cut in steel, we attempt to predict cut interruption before they even occur. To build a data set for training, cutting experiments are carried out with a 4 kW fiber laser, forcing incomplete cuts by varying the process parameters such as laser power and feed rate. The thermal radiation from the process zone during the cutting process is captured with a size of 256 × 256 px2 at sample rates of 20 × 103 fps. The kerf is recorded with a spectral sensitivity between 400 and 700 nm, without external illumination, which enables the melt to be observed in the range of the visual spectrum. The vision transformer model, which is used for image classification, splits the image into patches, linearly embedded with an added position embedding, and fed to a standard transformer encoder. For training the model, a set of images was labeled for the respective classes of a complete, incomplete, and impending incomplete cut. With the trained model, incomplete cuts in steel and aluminum can then be recognized and impending incomplete cuts in steel can be predicted in advance.}, subject = {Laserschneiden}, language = {en} } @article{SchleierEsenHellmann2023, author = {Schleier, Max and Esen, Cemal and Hellmann, Ralf}, title = {Evaluation of a Cut Interruption Algorithm for Laser Cutting Steel and Aluminum with a High-Speed Camera}, series = {Applied Sciences}, volume = {13}, journal = {Applied Sciences}, number = {7}, publisher = {MDPI AG}, issn = {2076-3417}, doi = {10.3390/app13074557}, year = {2023}, abstract = {We report on a monitoring system based on a high-speed camera for fiber laser fusion cutting. The monitoring system is used without an external illumination retrofit on a conventional cutting head, with the optical path aligned coaxially to the incident laser, permitting a direct, spatially, and temporally resolved detection of the melt pool area in the cut kerf from the top view. The dependence of the melt pool area on laser processing parameters such as laser power and feed rate are thus evaluated for stainless steel, zinc-coated steel, and aluminum, respectively. The signal characteristics of the images captured from the melt pool are examined in the visible spectral range of the emitted secondary thermal radiation from the process zone. An ad hoc developed image processing algorithm analyzes the spectral and geometric information of the melt pool from high-speed camera images and distinguishes between complete and incomplete cuts.}, subject = {Laserschneiden}, language = {en} } @article{SchleierEsenHellmann2022, author = {Schleier, Max and Esen, Cemal and Hellmann, Ralf}, title = {High speed melt flow monitoring and development of an image processing algorithm for laser fusion cutting}, series = {Journal of Laser Applications}, volume = {34}, journal = {Journal of Laser Applications}, number = {4}, publisher = {Laser Institute of America}, issn = {1042-346X}, doi = {10.2351/7.0000785}, year = {2022}, abstract = {This contribution presents high-speed camera monitoring of melt pool dynamics for steel during laser fusion cutting and compares the images with recordings in aluminum. The experiments are performed by a 4 kW multimode fiber laser with an emission wavelength of 1070 nm. To visualize the thermal radiation from the process zone during the cutting process, the kerf is captured at sample rates of up to 170 000 frames per second without external illumination with a spectral response between 400 and 700 nm, allowing measurements of the melt flow dynamics from geometric image features. The dependencies of the melt flow dynamics on laser processing parameters, such as feed rate, gas pressure, and laser power, can be evaluated. The monitoring system is placed both off-axis and mounted to a conventional cutting head, with the monitoring path aligned to the processing laser for a coaxial and lateral view of the cut kerf. The measured signal characteristics of the images captured from the melt pool are examined in the visible spectral range of the emitted thermal radiation from the process zone. Moreover, a specifically developed image processing algorithm is developed that process and analyze the captured images and extract geometric information for a measurement of the melt flow.}, subject = {Laserschneiden}, language = {en} } @article{SchleierAdelmannEsenetal.2022, author = {Schleier, Max and Adelmann, Benedikt and Esen, Cemal and Hellmann, Ralf}, title = {Image Processing Algorithm for In Situ Monitoring Fiber Laser Remote Cutting by a High-Speed Camera}, series = {Sensors}, volume = {22}, journal = {Sensors}, number = {8}, publisher = {MDPI AG}, issn = {1424-8220}, doi = {10.3390/s22082863}, year = {2022}, abstract = {We present an in situ process monitoring approach for remote fiber laser cutting, which is based on evaluating images from a high-speed camera. A specifically designed image processing algorithm allows the distinction between complete and incomplete cuts by analyzing spectral and geometric information of the melt pool from the captured images of the high-speed camera. The camera-based monitoring system itself is fit to a conventional laser deflection unit for use with high-power fiber lasers, with the optical detection path being coaxially aligned to the incident laser. Without external illumination, the radiation of the melt from the process zone is recorded in the visible spectral range from the top view and spatially and temporally resolved. The melt pool size and emitted sparks are evaluated in dependence of machining parameters such as feed rate, cycles, and focus position during cutting electrical sheets.}, subject = {Laserschneiden}, language = {en} } @unpublished{SchickelBenderKaysanetal.2025, author = {Schickel, Esther and Bender, Tamara and Kaysan, Leon and Hufgard, Simone and Mayer, Margot and Grosshans, David R. and Thielemann, Christiane and Schroeder, Insa S.}, title = {Human cerebral organoids model tumor infiltration and migration supported by astrocytes in an autologous setting}, series = {bioRxiv}, volume = {2025}, journal = {bioRxiv}, publisher = {Cold Spring Harbor Laboratory}, doi = {https://doi.org/10.1101/2025.01.29.635456}, pages = {43}, year = {2025}, abstract = {SummaryEfforts to achieve precise and efficient tumor targeting of highly malignant brain tumors are constrained by the dearth of appropriate models to study the effects and potential side effects of radiation, chemotherapy, and immunotherapy on the most complex human organ, the brain. We established a cerebral organoid model of brain tumorigenesis in an autologous setting by overexpressing c-MYC as one of the most common oncogenes in brain tumors. GFP+/c-MYChighcells were isolated from tumor organoids and used in two different culture approaches: assembloids comprising of a normal cerebral organoid with a GFP+/c-MYChightumor sphere and co-culture of cerebral organoid slices at air-liquid interface with GFP+/c-MYChighcells. GFP+/c-MYChighcells used in both approaches exhibited tumor-like properties, including overexpression of the c-MYC oncogene, high proliferative and invasive potential, and an immature phenotype as evidenced by increased expression of Ki-67, VIM, and CD133. Organoids and organoid slices served as suitable scaffolds for infiltrating tumor-like cells. Using our highly reproducible and powerful model system that allows long-term culture, we demonstrated that the migratory and infiltrative potential of tumor-like cells is shaped by the environment in which glia cells provide support to tumor-like cells.}, subject = {Hirntumor}, language = {en} } @article{Schmitt2025, author = {Schmitt, Joachim}, title = {Mentales Lagerfeuer}, series = {Zeitschrift f{\"u}r Unternehmensentwicklung und Change Management}, volume = {1/2025}, journal = {Zeitschrift f{\"u}r Unternehmensentwicklung und Change Management}, number = {01/2025}, editor = {Leiskau, Jan}, doi = {doi.org/10.5771/0724-6110}, pages = {1 -- 120}, year = {2025}, abstract = {Eigenverantwortung und Kooperation sind in einer modernen Organisationskultur gleichermaßen gefragt. Das hier pr{\"a}sentierte «Peer-learning-Format» wirkt in diesem Sinne wie ein Lagerfeuergespr{\"a}ch: Kleine Gruppen treffen sich, tauschen sich vertieft zu Grundfragen des Zusammenlebens aus und gehen gewandelt daraus hervor. Eine Evaluation der TH Aschaffenburg zeigt, dass mit diesem Format gr{\"o}ßere Teilnehmergruppen in die orientierte Entwicklung von Mindset und Kollaborationskultur eingebunden werden k{\"o}nnen. Dabei wird deutlich, dass diese «Learning-Circles» keine Selbstl{\"a}ufer sind, sondern eine Begleitarbeit im Sinne des Facilitation brauchen.}, subject = {Organisationsentwicklung}, language = {de} } @article{KrstićJuettnerGiegerichetal.2023, author = {Krstić, Nenad and J{\"u}ttner, Jens and Giegerich, Lars and Mayer, Margot and Knuth, Monika and M{\"u}ller, Achim and Thielemann, Christiane}, title = {3D printed biosensor for continuous glucose measurement in cell cultures}, series = {Annals of 3D Printed Medicine}, volume = {10}, journal = {Annals of 3D Printed Medicine}, publisher = {Elsevier BV}, issn = {2666-9641}, doi = {doi.org/10.1016/j.stlm.2023.100111}, year = {2023}, subject = {Biosensor}, language = {en} } @inproceedings{Klopp2025, author = {Klopp, Marco}, title = {An Empirical Survey of Students' and Professors' Perspectives on Computer Science University Teaching}, series = {Proceedings IEEE TALE}, volume = {2024}, booktitle = {Proceedings IEEE TALE}, publisher = {IEEE}, isbn = {979-8-3503-7623-4}, doi = {doi.org/10.1109/TALE62452.2024.10834372}, pages = {8}, year = {2025}, abstract = {This paper presents a study which examines the pedagogical-interactional dimensions in computer science education at universities of applied sciences, focusing on the expectations and perceptions of students and professors. Data were collected using a modified version of the Learning Culture Inventory (LCI) questionnaire and analyzed both descriptively and inferentially. The descriptive statistics reveal differences in the mean values between the ideal and real states of educational conditions as perceived by students and professors. Inferential statistical analyses using t-tests identified significant differences between the perceptions of the two groups. The effect size Cohen's d was also calculated to determine the strength of the existing difference. The analyses show that there are significant differences in many dimensions of the LCI between the perspectives of students and professors. These differences are often associated with high effect sizes. The results therefore indicate that the students' expectations and perceptions deviate (considerably) from the professors' perspectives.}, subject = {Informatikstudium}, language = {en} } @misc{StanikDoehringZeisingetal.2024, author = {Stanik, Eva and D{\"o}hring, Thorsten and Zeising, Sebastian and Meißner, Martin}, title = {An astronomy event at Aschaffenburg University to attract future engineering students}, series = {18th INTEGRAL/BART Workshop}, volume = {2024}, journal = {18th INTEGRAL/BART Workshop}, organization = {TH Aschaffenburg}, pages = {1 -- 1}, year = {2024}, abstract = {In 2023 the German Federal Ministry of Education and Research (BMBF) and the German organization for science communication "Wissenschaft im Dialog" (German for: Science in dialogue) jointly proclaimed a "Science Year" with the motto "Our Universe". One of the numerous events that have been supported thereby has been that of the project "Zirkus UNI-versum" (in English: "Circus UNI-verse"), which took place in summer 2023 at Aschaffenburg University of Applied Sciences. Two school classes from the local high school "Kronberg-Gymnasium" first experienced an interactive astronomy lecture including a planetarium star show in a tent. Another highlight was the rocket car race in front of the cafeteria and the exclusive launch of a water rocket on the campus green. After the collective countdown, it reached a height of around eighty meters and thus rose higher than all the trees and buildings on the campus site. For their own exploration of the night sky the pupils obtained small cardboard star maps to assemble themselves as a homework. On the summer evenings of the following school holidays, they certainly observed the sky with a different point of view and, above all, with expert knowledge. The event has given them interesting impressions of Aschaffenburg Technical University as an attractive local education facility. The project "Zirkus UNI-versum" - and other activities for schools - intend to stimulate the interest of pupils in STEM subjects and to attract future engineering students.}, subject = {Astronomie}, language = {en} } @misc{KhropostDoehringRiethmuelleretal.2024, author = {Khropost, Diana and D{\"o}hring, Thorsten and Riethm{\"u}ller, Franziska and H{\"u}lag{\"u}, Deniz}, title = {Poly-dopamine - an organic material for X-ray mirror coatings and other technical applications}, series = {AXRO 2024 - 15th International Conference on Astronomical X-Ray Optics}, volume = {2024}, journal = {AXRO 2024 - 15th International Conference on Astronomical X-Ray Optics}, organization = {TH Aschaffenburg}, pages = {1 -- 1}, year = {2024}, abstract = {Although the organic molecule dopamine (3,4-dihydroxyphenethylamine) is commonly known as the "hormone of happiness", thin polymer films of poly-dopamine also have interesting technical properties. When produced by dip coating, these self-organizing layers grow in a reproducible thickness of single or multiple molecule monolayers of a few nanometre thickness only. One application is the use of thin poly-dopamine overcoatings to increase the soft X-ray reflectivity of astronomical X-ray mirrors. We thereby introduce a method of determining the layer thickness of poly-dopamine, which is based on spectroscopic ellipsometry measurements and applies an optical model for the poly-dopamine layers including their dielectric function. Furthermore, we give an outlook to other technical applications for this promising material, presenting this bio-inspired organic polymer as an innovative technical solution for the future.}, subject = {R{\"o}ntgenspiegel}, language = {en} } @inproceedings{StanikDoehringPregleretal.2024, author = {Stanik, Eva and D{\"o}hring, Thorsten and Pregler, Jan and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {A visitor experiment on astronomical X-ray optics for the "Deutsches R{\"o}ntgen-Museum"}, series = {AXRO 2024 - 15th International Conference on Astronomical X-Ray Optics}, volume = {2024}, booktitle = {AXRO 2024 - 15th International Conference on Astronomical X-Ray Optics}, organization = {TH Aschaffenburg}, pages = {1 -- 1}, year = {2024}, abstract = {The "Deutsches R{\"o}ntgenmuseum" in Remscheid is the unique institution worldwide that researches and documents the life and work of the first Nobel Prize winner, Wilhelm Conrad R{\"o}ntgen, and the effects of his discovery of X-rays. As an integral part of the museum, the R{\"o}Lab laboratory offers visitors the opportunity to gain practical experience in X-rays, optics and technology through own experiments. As part of a joint development project, students from Aschaffenburg University of Applied Sciences are currently designing a visitor experiment on astronomical X-ray optics for the museum laboratory. An optical set-up with visible light illustrate the focusing principle of X-ray telescopes, e.g. for wide-angle optics based on the lobster-eye principle. Display boards explain the optics of various types of telescopes with accompanying text and corresponding illustrations. Modern X-ray observatories such as CHANDRA, XMM-Newton and eROSITA are presented clearly. Once implemented, the new visitor experiment inside the "Deutsches R{\"o}ntgenmuseum" intend to inspire young researchers for the fascinating world of X-ray optics and X-ray astronomy.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {en} } @incollection{LampertJungHubertetal.2022, author = {Lampert, Pascal and Jung, Janis and Hubert, Andreas and Doll, Konrad}, title = {Looping Through Color Space: A Simple Augmentation Method to Improve Biased Object Detection}, series = {Lecture Notes in Networks and Systems}, booktitle = {Lecture Notes in Networks and Systems}, publisher = {Springer Nature Singapore}, address = {Singapore}, isbn = {9789811916069}, issn = {2367-3370}, doi = {10.1007/978-981-19-1607-6_61}, pages = {687 -- 698}, year = {2022}, subject = {Objekterkennung}, language = {en} } @misc{ReichertDoll2023, author = {Reichert, Hannes and Doll, Konrad}, title = {An image encoding method for recording projection information of two-dimensional projections}, year = {2023}, subject = {Bildsignal}, language = {en} } @inproceedings{HetzelReichertDolletal.2021, author = {Hetzel, Manuel and Reichert, Hannes and Doll, Konrad and Sick, Bernhard}, title = {Smart Infrastructure: A Research Junction}, series = {2021 IEEE International Smart Cities Conference (ISC2)}, booktitle = {2021 IEEE International Smart Cities Conference (ISC2)}, publisher = {IEEE}, doi = {https://doi.org/10.1109/ISC253183.2021.9562809}, pages = {1 -- 4}, year = {2021}, subject = {Autonomes Fahrzeug}, language = {en} } @inproceedings{ReichertLangRoschetal.2021, author = {Reichert, Hannes and Lang, Lukas and Rosch, Kevin and Bogdoll, Daniel and Doll, Konrad and Sick, Bernhard and Rellss, Hans-Christian and Stiller, Christoph and Zollner, J. Marius}, title = {Towards Sensor Data Abstraction of Autonomous Vehicle Perception Systems}, series = {2021 IEEE International Smart Cities Conference (ISC2)}, booktitle = {2021 IEEE International Smart Cities Conference (ISC2)}, publisher = {IEEE}, doi = {https://doi.org/10.1109/ISC253183.2021.9562912}, pages = {1 -- 4}, year = {2021}, subject = {Autonomes Fahrzeug}, language = {en} } @inproceedings{ZernetschReichertKressetal.2022, author = {Zernetsch, Stefan and Reichert, Hannes and Kress, Viktor and Doll, Konrad and Sick, Bernhard}, title = {A Holistic View on Probabilistic Trajectory Forecasting - Case Study. Cyclist Intention Detection}, series = {2022 IEEE Intelligent Vehicles Symposium (IV)}, booktitle = {2022 IEEE Intelligent Vehicles Symposium (IV)}, publisher = {IEEE}, doi = {https://doi.org/10.1109/IV51971.2022.9827220}, pages = {265 -- 272}, year = {2022}, subject = {Autonomes Fahrzeug}, language = {en} } @article{MarxSeefeldtHaskeetal.2025, author = {Marx, Jan and Seefeldt, Malte and Haske, Damian and Lutz, Christian and Hellmann, Ralf and Esen, Cemal and Ostendorf, Andreas}, title = {Holographic freeform micro hole processing using Bessel beams}, series = {Optics \& Laser Technology}, volume = {183}, journal = {Optics \& Laser Technology}, publisher = {Elsevier BV}, issn = {0030-3992}, doi = {10.1016/j.optlastec.2024.112287}, year = {2025}, abstract = {Bessel beams are advantageous tools for micro drilling applications due to their diffraction-free properties, their long focal length, and their small focal spot diameter. However, their application in industry is limited because they are challenging to integrate into flexible beam shaping systems. This work is intended to overcome limitations in flexibility by presenting a new approach paving the way to high-aspect ratio freeform holes. Therefore, a spatial light modulator was integrated into an axicon-based setup to merge diffraction-free ablation with the flexibility of holographic spatial beam shaping. A dynamic change of the phase hologram displayed on the spatial light modulator during the process allows for the generation of arbitrary ablation geometries. In contrast to other holographic approaches, the diffraction-free nature of the Bessel beam allows ablation over an extended focal depth without any focus control needed. The applicability of the approach was demonstrated by processing arbitrary hole shapes, such as ellipses, squares, or star-shapes. The hole sizes of the freeform holes range from 4 μm to 80 μm. Furthermore, up-scaling of the process is demonstrated by using the setup for generation of multi-Bessel spots.}, subject = {Mikrobearbeitung}, language = {en} } @article{LutzJungTschirpkeetal.2022, author = {Lutz, Christian and Jung, Marcel and Tschirpke, Katrin and Esen, Cemal and Hellmann, Ralf}, title = {Optimization of Heat Accumulation during Femtosecond Laser Drilling Borehole Matrices by Using a Simplex Algorithm}, series = {Materials}, volume = {15}, journal = {Materials}, number = {14}, publisher = {MDPI AG}, issn = {1996-1944}, doi = {10.3390/ma15144829}, year = {2022}, abstract = {We report on an optimization study of percussion drilling thin metal sheets employing a high repetition rate, high power femtosecond laser with respect to the resulting heat accumulation. A specified simplex algorithm was employed to optimize the spatial drilling sequence, whereas a simplified thermal simulation using COMSOL was validated by comparing its results to the temperature measurements using an infrared camera. Optimization for drilling borehole matrices was aspired with respect to the generated temperature across the processed specimen, while the drilling strategy was altered in its spatial drilling sequence and by using multi-spot approaches generated by a spatial light modulator. As a result, we found that an optimization strategy based on limited consecutive holes in a Moore neighborhood led to reduced temperatures and the shortest process times.}, subject = {Femtosekundenlaser}, language = {en} } @article{MarxLutzHellmannetal.2022, author = {Marx, Jan and Lutz, Christian and Hellmann, Ralf and Esen, Cemal}, title = {Holographic multi-spot generation for ultra-short pulse Bessel beam processing of stainless steel}, series = {Procedia CIRP}, volume = {111}, journal = {Procedia CIRP}, publisher = {Elsevier BV}, issn = {2212-8271}, doi = {10.1016/j.procir.2022.08.003}, pages = {648 -- 652}, year = {2022}, subject = {Ultrakurzzeitlaser}, language = {en} } @inproceedings{LutzHelmEsenetal.2024, author = {Lutz, Christian and Helm, Jonas and Esen, Cemal and Hellmann, Ralf}, title = {Computational optimization of borehole sequences for the reduction of heat accumulation in drilling processes using ultrashort pulse lasers}, series = {Laser-based Micro- and Nanoprocessing XVIII}, booktitle = {Laser-based Micro- and Nanoprocessing XVIII}, editor = {Kling, Rainer and Pfleging, Wilhelm and Sugioka, Koji}, publisher = {SPIE}, doi = {10.1117/12.3000930}, year = {2024}, abstract = {We report on laser drilling of borehole arrays using a high-power ultrashort pulse laser with particular focus on reducing heat accumulation in the workpiece by optimizing the drilling sequence, particularly for highly efficient multi-spot drilling. Different optimization approaches are chosen to improve the drilling sequence, also comparing a simplex algorithm and an evolutionary algorithm. From a laser application point of view, we also compare drilling sequences using a single spot and up to 16-fold multi-spots generated by a spatial light modulator, as to accelerate the drilling process in terms of the number of drilled holes per second. To evaluate the temperatures generated during drilling of up to 40,000 holes in less than 76 seconds in stainless steel foil, temperatures are measured by a thermal imaging camera and subsequently compared to a COMSOL-based simulation for all optimized drilling sequences. With respect to an average temperature of 706 °C without optimization, a reduction by 252 °C, i.e., a reduction by nearly 36 \% based on the Celsius scale, is achieved using a 4 × 4 beam splitter and an optimized drilling sequence with a drilling rate of 526 holes per second. In addition, using a 2 × 2 beam splitter, a temperature reduction of up to 40.5 \% is achieved for a drilling process with a rate of 129 holes per second using an optimized drilling sequence.}, subject = {Ultrakurzzeitlaser}, language = {en} } @inproceedings{LutzSommerhuberKettneretal.2024, author = {Lutz, Christian and Sommerhuber, Ryan and Kettner, Matthias and Esen, Cemal and Hellmann, Ralf}, title = {Towards process control by detecting acoustic emissions during ultrashort pulsed laser ablation of multilayer materials}, series = {Laser-based Micro- and Nanoprocessing XVIII}, booktitle = {Laser-based Micro- and Nanoprocessing XVIII}, editor = {Kling, Rainer and Pfleging, Wilhelm and Sugioka, Koji}, publisher = {SPIE}, doi = {10.1117/12.3000954}, year = {2024}, abstract = {We report on process sensing using a membrane-free optical microphone to monitor the acoustic emission during ultrashort pulsed laser ablation of multilayer materials. The acoustic emission during ablation is used to detect material transitions, with the specific signatures allowing to create a reliable process control for identifying individual layers. The outstanding properties of membrane-free optical microphones in terms of high bandwidth and high temporal resolution are ideally qualified for characterizing an ultrashort pulsed laser process, with its properties and capabilities being presented in this contribution. In particular, for layer- and material-selective ablation of multilayer printed circuit board components, copper and polyimide layers are ablated and the material transition is detected by analyzing the acoustic signal at different frequency levels, which is a novelty in the field of ultrashort pulsed laser process sensing. The investigations show, that the optical microphone can be used to resolve both the scanning paths and ablated layers by means of interruptions in a time-resolved acoustic spectrogram. Furthermore, as a result of a higher ablation rate of polyimide compared to copper and thus the increase of the emitted acoustic energy, the material transition between copper and polyimide layers can clearly be detected. The detection of this process event can be used for process control.}, subject = {Ultrakurzzeitlaser}, language = {en} } @inproceedings{LutzSchwarzMarxetal.2024, author = {Lutz, Christian and Schwarz, Simon and Marx, Jan and Esen, Cemal and Hellmann, Ralf}, title = {Combination of an axicon and a spatial light modulator for the generation of multiBessel beams for microdrilling using ultrashort pulsed laser}, series = {Laser-based Micro- and Nanoprocessing XVIII}, booktitle = {Laser-based Micro- and Nanoprocessing XVIII}, editor = {Kling, Rainer and Pfleging, Wilhelm and Sugioka, Koji}, publisher = {SPIE}, doi = {10.1117/12.3000946}, year = {2024}, abstract = {Due to their special beam profile, Bessel beams offer advantageous properties for micro-drilling and internal volume processing, especially for transparent materials. In addition, the laser power of industrial ultrashort pulsed lasers hasnincreased significantly in recent years, offering the possibility of highly efficient processes using multi-spot profiles. We report on optical simulations and an experimental optical setup for generating multi-Bessel beams by combining a refractive axicon and a spatial light modulator. This setup offers a new possibility of multi-Bessel beam generation by functional division of the Bessel beam generation by the axicon and the possibility of separation flexible beam splitting by a spatial light modulator. The beam profiles generated with this setup are analyzed and compared in this study using optical simulations and experiments. In addition to the analysis of the Bessel beams in the machining plane, they are also analyzed in the propagation direction by means of intensity distributions measured by a camera in small-step z positions. Furthermore, the experimental applicability of the module-based beam shaping system is demonstrated by integrating into an existing laser system.}, subject = {Ultrakurzzeitlaser}, language = {en} } @inproceedings{MittelHubertDingetal.2023, author = {Mittel, Dominik and Hubert, Andreas and Ding, Junsheng and Perzylo, Alexander}, title = {Towards a Knowledge-Augmented Socio-Technical Assistance System for Product Engineering}, series = {2023 IEEE 28th International Conference on Emerging Technologies and Factory Automation (ETFA)}, booktitle = {2023 IEEE 28th International Conference on Emerging Technologies and Factory Automation (ETFA)}, publisher = {IEEE}, doi = {10.1109/ETFA54631.2023.10275386}, pages = {1 -- 4}, year = {2023}, abstract = {Digital tools for handling the whole product engineering phase are getting more and more important in the context of Industry 4.0 and an increasing product variety. However, especially in small and medium-sized enterprises, a lot of information about product development and production is stored in different documents or isolated data silos. A promising way to arrive at a solution is to model data and knowledge with ontologies and enrich it with context information. This paper presents a concept and a showcase implementation of a company-internal and personalized assistance system for an end-to-end digital product engineering process. We combine a generic and cost-efficient human assistance solution focusing on social aspects and a company-wide knowledge graph to create a seamless and highly integrated data structure that assists many stakeholders in the product engineering process, from product designers to assembly workers. As a result, more complex products can be handled and the product engineering process can be accelerated.}, subject = {Produktentwicklung}, language = {en} } @inproceedings{AltmannSuppeltRuhletal.2024, author = {Altmann, Alexander Anton and Suppelt, Sven and Ruhl, Max and Schaumann, Stephan and Latsch, Bastian and Ben Dali, Omar and Zhukov, Sergey and Flachs, Dennis and Zhang, Xiaoqing and Thielemann, Christiane and Seggern, Heinz von and Kupnik, Mario}, title = {Monolithic Wideband Air-Coupled Ultrasonic Transducer Based on Additively Manufactured Ferroelectrets}, series = {2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)}, booktitle = {2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)}, publisher = {IEEE}, doi = {10.1109/UFFC-JS60046.2024.10793858}, pages = {1 -- 4}, year = {2024}, abstract = {Air-coupled ultrasonic transducers are widely used in non-destructive testing, acoustical sonar systems, and biomedical imaging. These applications require transducers that operate effectively across a broad acoustic frequency spectrum, offer adaptable geometric designs, and increasingly incorporate eco-friendly materials. In this work, we present a monolithic, 3D-printed air-coupled ultrasonic transducer based on ferroelectrets (FEs) and fabricated from biocompatible polylactic acid (PLA). We evaluated the transducer's acoustical performance by measuring the surface velocity of its active area using laser Doppler vibrometry and assessed its robustness during continuous operation over a 19-day period. Additionally, we measured the sound pressure level (SPL) and wideband characteristics in an anechoic chamber across excitation frequencies from 1kHz to 100kHz. At a resonance frequency of 33kHz, our transducer achieved an SPL of 94.3dB and surface velocities up to 37mm/s. The measured bandwidth of 65.2kHz at the -6dB threshold corresponds to a fractional bandwidth of 189\%. The observed exponential decay of the surface velocity, stabilizing at 15\% of its initial amplitude, aligns with the isothermal surface potential decay typically observed in FE films made from PLA. These results demonstrate the effectiveness of the transducer, which features an adaptable backplate for tuning acoustic properties. The low-cost transducer, manufactured from biocompatible PLA, is particularly suited for imaging and biomedical applications furthering green electronics.}, subject = {Ultraschallwandler}, language = {en} } @inproceedings{XuMoeckel2024, author = {Xu, Xukuan and M{\"o}ckel, Michael}, title = {Machine Learning Based Early Rejection of Low Performance Cells in Li Ion Battery Production}, series = {CACML '24: Proceedings of the 2024 3rd Asia Conference on Algorithms, Computing and Machine Learning}, booktitle = {CACML '24: Proceedings of the 2024 3rd Asia Conference on Algorithms, Computing and Machine Learning}, doi = {https://doi.org/10.1145/3654823.3654870}, pages = {251 -- 256}, year = {2024}, abstract = {Lithium-ion battery cell production is conducted through a multistep production process which suffers from a notable scrap rate. Machine learning (ML) based process monitoring provides solutions to mitigate the impact of substantial scrap rates by repeated multifactorial quality predictions (virtual quality gates) along the process line. This enables an early rejection of battery cells which are unlikely to reach required specifications, avoids further waste of resources at later process steps and simplifies recycling of rejected cells. A hierarchical architecture is used to apply ML algorithms first for process-adapted feature extraction which is guided by a priori knowledge on typical production anomalies. In a second step, these features are correlated with end-of-line quality control data using explainable ML methods. The resulting predictions may lead to pass or fail of a battery cell, or -in the context of flexible production- may also trigger adjustments of later process steps to compensate for detected deficiencies. An example ML based quality control concept is illustrated for a pilot battery cell production line.}, subject = {Maschinelles Lernen}, language = {en} } @article{XuDonghuiBietal.2024, author = {Xu, Xukuan and Donghui, Li and Bi, Jinghou and M{\"o}ckel, Michael}, title = {AutoML based workflow for design of experiments (DOE) selection and benchmarking data acquisition strategies with simulation models}, series = {Scientific Reports}, journal = {Scientific Reports}, doi = {https://doi.org/10.1038/s41598-024-83581-3}, year = {2024}, abstract = {Design of experiments (DOE) is an established method to allocate resources for efficient parameter space exploration. Model based active learning (AL) data sampling strategies have shown potential for further optimization. This paper introduces a workflow for conducting DOE comparative studies using automated machine learning. Based on a practical definition of model complexity in the context of machine learning, the interplay of systematic data generation and model performance is examined considering various sources of uncertainty: this includes uncertainties caused by stochastic sampling strategies, imprecise data, suboptimal modeling, and model evaluation. Results obtained from electrical circuit models with varying complexity show that not all AL sampling strategies outperform conventional DOE strategies, depending on the available data volume, the complexity of the dataset, and data uncertainties. Trade-offs in resource allocation strategies, in particular between identical replication of data points for statistical noise reduction and broad sampling for maximum parameter space exploration, and their impact on subsequent machine learning analysis are systematically investigated. Results indicate that replication oriented strategies should not be dismissed but may prove advantageous for cases with non-negligible noise impact and intermediate resource availability. The provided workflow can be used to simulate practical experimental conditions for DOE testing and DOE selection.}, subject = {Maschinelles Lernen}, language = {en} } @article{KeferPapeBischoffetal.2024, author = {Kefer, Stefan and Pape, Natalie and Bischoff, Kay and Schmauss, Bernhard and Hellmann, Ralf}, title = {Lattice-Like Waveguides With Integrated Bragg Gratings in Planar Cyclic Olefin Copolymers}, series = {Journal of Lightwave Technology}, volume = {42}, journal = {Journal of Lightwave Technology}, number = {18}, publisher = {Institute of Electrical and Electronics Engineers (IEEE)}, issn = {0733-8724}, doi = {10.1109/JLT.2023.3328323}, pages = {6302 -- 6311}, year = {2024}, abstract = {This contribution demonstrates femtosecond laser direct writing of lattice-like waveguides in planar cyclic olefin copolymer substrates. Based on numerical simulation and experimental near-field analysis, stable single-mode waveguiding around wavelengths of 1550 nm is demonstrated. The waveguiding mechanism is based on a hexagonal array of laser-induced, positive refractive index modification lines. Thus, the lateral extension of the guided mode can be adapted by varying the fabrication parameters and, in consequence, the resulting cross-sectional arrangement of the refractive index perturbations. With an optical attenuationof 2.2 dB·cm-1 around 1550 nm, the fabricated waveguides are well-suited for on-chip integrated photonic devices. Moreover, the waveguides can also be equipped with Bragg gratings to enable the application of the photonic platform as a sensing device. Dependingon their length, the Bragg grating structures exhibit reflectivities ofup to 99\% and spectral widths down to 0.3 nm. The flexibility of the fabrication process and the sensing capabilities of the lattice-like waveguides with integrated Bragg gratings are underlined by an exemplary application study demonstrating a relative pressure sensor. For that, a photonic platform is micromilled to generate a 300 µm thick diaphragm and a reference pressure chamber. The strain introduced to the diaphragm by external pressure changes can then be quantified by the integrated photonic structures.This way, absolute pressure sensitivities of up to 38 pm·kPa-1 can be achieved in a relative pressure range from -60 to 100 kPa. The newly-developed lattice-like waveguides with integrated Bragggratings are therefore well-suited for the realization of novel and adaptable photonic devices and sensors.}, subject = {Wellenleiter}, language = {en} } @incollection{TalluriWeidl2024, author = {Talluri, Kranthi Kumar and Weidl, Galia}, title = {Impact of Accidents on Traffic Congestions: A Bayesian Network Approach Using Real City Data}, series = {Advances in Transdisciplinary Engineering}, booktitle = {Advances in Transdisciplinary Engineering}, number = {63}, publisher = {IOS Press}, isbn = {9781643685601}, issn = {2352-751X}, doi = {10.3233/ATDE241181}, pages = {64 -- 78}, year = {2024}, abstract = {Traffic congestion has been a major concern in urban areas due to its strong impact on various social, economic, and human safety sectors. Understanding the relationship and analyzing the trends and patterns between congestion and accidents can strengthen the strategy for reducing traffic congestion. Research on causes of accidents and their impact on congestion has recently been explored on a greater scale, but there is still a lot of scope for vast areas of improvement. To tackle this issue, we built a Bayesian Network (BN) model for analyzing and predicting congestion probability that can occur due to accidents. In this work, the complexity of handling real data obtained from Darmstadt city is described in detail. The accidents and congestion are correlated by introducing a novel threshold-based approach, which identifies congestion based on the change in vehicle density immediately following an accident. Different thresholds are explored to determine the most reliable measure of congestion, with the T4 threshold emerging as the optimal choice. Moreover, the proposed BN model is evaluated against several machine learning models, demonstrating competitive performance and its ability to understand the root cause of traffic congestion.}, subject = {Verkehrsstau}, language = {en} } @inproceedings{RaiynWeidl2024, author = {Raiyn, Jamal and Weidl, Galia}, title = {Assessing Inattentiveness and Human Elements in Critical Driving Safety Events}, series = {9th European Congress on Computational Methods in Applied Sciences and Engineering 3-7 June 2024, Lisboa, Portugal}, booktitle = {9th European Congress on Computational Methods in Applied Sciences and Engineering 3-7 June 2024, Lisboa, Portugal}, year = {2024}, abstract = {Road accidents, with their potential for severe consequences, pose an ongoing global challenge. Within the multitude of factors contributing to these incidents, inattentiveness and the intricate human elements inherent in driving behaviors stand out as pivotal. As indicated by reports and studies on traffic safety, a significant share of accidents can be attributed to driver inattentiveness, encompassing activities such as texting, talking on the phone, or simply being distracted by the surrounding environment. Beyond these observable behaviors lie complex human elements, influenced by factors ranging from cognitive processes to emotional states, which significantly contribute to the occurrence and severity of critical safety events. Inattentiveness is defined as a state in which a driver's eye gaze behavior deviates from attentive driving patterns. It can be influenced by human factors and adverse weather conditions, serving as an indicator of an increased risk of inattentiveness and the potential to contribute to safety-critical events on the road. Recognition of inattentiveness occurs when the average gaze duration on the road or critical areas falls below a specified threshold. The driver's response time is crucial to the braking process of the vehicle and, therefore, has a significant impact on safety in critical situations.}, subject = {Fahrerassistenzsystem}, language = {en} } @unpublished{ChaarRaiynWeidl2024, author = {Chaar, Mohamad Mofeed and Raiyn, Jamal and Weidl, Galia}, title = {Improving the Perception of Objects under Foggy Conditions in the Surrounding Environment}, publisher = {Research Square Platform LLC}, doi = {https://doi.org/10.21203/rs.3.rs-3821656/v1}, year = {2024}, abstract = {Autonomous Driving (AD) technology has rapidly advanced in recent years. Some challenges remain, particularly in ensuring robust performance under adverse weather conditions, like heavy fog. To address this, we propose a multi-class fog density classification approach to enhance the performance of AD systems. By dividing the fog density into multiple classes (25\\%, 50\\%, 75\\%, and 100\\%) and generating separate data-sets for each class using the Carla simulator, we can independently improve perception for each fog density and examine the effects of fog at each level. This approach offers several advantages, including improved perception, targeted training, and enhanced generalizability. The results show improved perception of objects from the categories: cars, buses, trucks, vans, pedestrians, and traffic lights. Our multi-class fog density approach is a promising step towards achieving robust AD system performance under adverse weather conditions.}, subject = {Autonomes Fahrzeug}, language = {en} } @inproceedings{RaiynChaarWeidl2024, author = {Raiyn, Jamal and Chaar, Mohamad Mofeed and Weidl, Galia}, title = {Analysis of Driving Behavior in Adverse Weather Conditions}, series = {IEEE 7th International Conference AND workshop in {\´O}buda on Electrical and Power Engineering (CANDO EPE 2024)}, booktitle = {IEEE 7th International Conference AND workshop in {\´O}buda on Electrical and Power Engineering (CANDO EPE 2024)}, year = {2024}, abstract = {This paper discusses the impact of Connected Cooperative and Automated Mobility (CCAM) on safety-critical events. The replacement of human drivers by autonomous vehicles (AVs) is promising improved traffic efficiency and reduction of car- crashes to zero using a baseline network traffic. Predicting driving behavior during car-following has been crucial for enhancing road safety while developing advanced driver assistance systems with adaptive cruise control. Human factors significantly influence the driving behavior of a vehicle. Thus, understanding the causal relations between human factors and driving behavior is essential for accurate prediction of vehicle behavior. This is important when autonomous vehicles are expected to behave (cooperatively, according to traffic rules and good praxis) in a human predictable manner, while driving in mixed traffic, involving autonomous, automated, and human driven vehicles. In this paper, we propose a methodology that combines convolutional neural networks (CNNs) with human factors analysis to predict driving behavior during car-following under adverse weather conditions (AWCs).}, subject = {Autonomes Fahrzeug}, language = {en} } @incollection{MadsenWeidl2024, author = {Madsen, Anders L. and Weidl, Galia}, title = {Bayes'sche Netze als Methode zur Implementierung transparenter, erkl{\"a}rbarer und vertrauensw{\"u}rdiger K{\"u}nstlicher Intelligenz}, series = {Vertrauen in K{\"u}nstliche Intelligenz - Eine multi-perspektivische Betrachtung}, booktitle = {Vertrauen in K{\"u}nstliche Intelligenz - Eine multi-perspektivische Betrachtung}, publisher = {Springer Verlag}, pages = {139 -- 162}, year = {2024}, abstract = {Dieser Beitrag betrachtet die Verwendung von Bayes'schen Netzen als Methode zur Implementierung von transparenter, erkl{\"a}rbarer und vertrauensw{\"u}rdiger K{\"u}nstlicher Intelligenz (KI). Er beginnt mit einer Darstellung und Diskussion von Schl{\"u}sselkonzepten im Zusammenhang mit der Verwendung von Methoden der K{\"u}nstlichen Intelligenz und der Implementierung von erkl{\"a}rbarer und vertrauensw{\"u}rdiger KI. Der Beitrag diskutiert mehrere Konzepte aus dem Bereich der Bayes'schen Netze, die f{\"u}r die praktische Anwendung dieser Modelle in Systemen mit KI relevant sind. Zu den betrachteten Konzepten geh{\"o}ren unter anderem der Bayes-Faktor, die wahrscheinlichste Erkl{\"a}rung und die relevanteste Erkl{\"a}rung. Der Beitrag endet mit einem Fallbeispiel aus dem Bereich des automatisierten Fahrens, das veranschaulicht, wie transparente und erkl{\"a}rbare KI mithilfe von Bayes'schen Netzen umgesetzt werden kann, um eine vertrauensw{\"u}rdige L{\"o}sung zu schaffen.}, subject = {K{\"u}nstliche Intelligenz}, language = {de} } @inproceedings{WeidlBerresMadsenetal.2024, author = {Weidl, Galia and Berres, Stefan and Madsen, Anders L. and Daxenberger, Johannes and Aulbach, Anegret}, title = {Exploring Argument Mining and Bayesian Networks for Assessing Topics for City Project Proposals}, series = {Proceedings of Machine Learning Research}, volume = {2024}, booktitle = {Proceedings of Machine Learning Research}, number = {246}, pages = {438 -- 451}, year = {2024}, abstract = {The digital transformation of cities inspired the city administration of Aschaffenburg, Germany, to apply artificial intelligence to reduce the significant amount of manual administrative effort needed to evaluate citizens' ideas for potential future projects. This paper introduces a methodology that combines argument mining with Bayesian networks to evaluate the relative eligibility of city project proposals. The methodology involves two main steps: (1) clustering arguments extracted from public information available on the Internet, and (2) assessing and comparing selected urban issues, planning topics, and citizens' ideas that have been widely discussed to measure public interest in potential candidate projects. The results of the clustering are fed into a Bayesian network, along with scores for several evaluation criteria, to generate a relative eligibility score. The framework was applied to three candidate projects, resulting in the selection of one of them, while the other two were rejected with a given explanation. The latter motivates the decision and provides transparency to all parties involved in the decision process. The methodology is applicable to other cities after adjustments of criteria.}, subject = {Projektplanung}, language = {en} } @incollection{Schork2024, author = {Schork, Sabrina}, title = {Effective Innovation Leadership Framework: Self-Reflection Method}, series = {Creative Methods Toolkid}, booktitle = {Creative Methods Toolkid}, publisher = {Springer}, pages = {289 -- 292}, year = {2024}, abstract = {Imagining, designing and teaching regenerative futures is challenging. Educators often lack approaches that allow them to address the complexities of global challenges through new narratives, which make space for the imagination of desirable futures. Commonly in education, we retell the story of an apocalyptic future when speaking about global challenges such as biodiversity degradation and climate change. This narrative, which focuses on the risks and dangers of global environmental change, is built on the assumption that the induced fear might lead to action. This toolkit supports educators who wish to follow a different route. It is based on the assumption that "we can't create what we cannot imagine" (quote by Lucile Clifton). Consequently, imagining, designing, and teaching regenerative futures is the basis and starting point for actualizing them. The beginning of fundamental change is often hard to track because it first takes place in our minds. Visible, large-scale change arises from invisible, wild ideas and imaginations. According to the philosopher and educator John Dewey, imagination is "the ability to look at things as if they could be otherwise". This ability to ask "what if?" is central to envisioning and enacting better lives. The lack of broad-scale action towards regenerative ways of living can be seen as a lack of imagination to create shared visions of an alternative future. Collectively envisioning desirable futures provides the motivation and guidance for change, or as the poet Rainer Maria Rilke put it: "the future enters into us, in order to transform itself in us, long before it happens." This toolkit introduces a broad variety of creative and arts-based methods for regeneration and transformation that can be used in various educational settings. It harnesses the power of creative and arts-based practices, which are increasingly seen as a means of expanding future imaginaries and supporting the development of new scenarios of transformative change. The toolkit was developed within the COST Action SHiFT Social Sciences and Humanities for social transformation and climate change as an initiative of Working Group 3: Creative Practices and Outreach. It comprises a selection of 68 creative methods brought together in a collaborative effort by 124 authors from 31 countries and 6 continents. Its intention is to comprise a valuable resource for educators, teachers, lecturers, community workers, and change-makers who are aiming to empower their learners while providing competencies in regenerative design, climate action, futures thinking, human-nature connection, wellbeing and community engagement. This toolkit is more than a collection of methods but a call to action and a comprehensive resource developed through the synergistic efforts of contributors worldwide.}, subject = {Hochschulunterricht}, language = {en} } @inproceedings{HetzelReichertReitbergeretal.2023, author = {Hetzel, Manuel and Reichert, Hannes and Reitberger, G{\"u}nther and Fuchs, Erich and Doll, Konrad and Sick, Bernhard}, title = {The IMPTC Dataset: An Infrastructural Multi-Person Trajectory and Context Dataset}, series = {2023 IEEE Intelligent Vehicles Symposium (IV)}, booktitle = {2023 IEEE Intelligent Vehicles Symposium (IV)}, publisher = {IEEE}, doi = {https://doi.org/10.1109/IV55152.2023.10186776}, pages = {1 -- 7}, year = {2023}, subject = {Autonomes Fahrzeug}, language = {en} } @inproceedings{ReichertHetzelSchrecketal.2023, author = {Reichert, Hannes and Hetzel, Manuel and Schreck, Steven and Doll, Konrad and Sick, Bernhard}, title = {Sensor Equivariance by LiDAR Projection Images}, series = {2023 IEEE Intelligent Vehicles Symposium (IV)}, booktitle = {2023 IEEE Intelligent Vehicles Symposium (IV)}, publisher = {IEEE}, doi = {https://doi.org/10.1109/IV55152.2023.10186817}, pages = {1 -- 6}, year = {2023}, subject = {Bildverarbeitung}, language = {en} } @inproceedings{SchreckReichertHetzeletal.2023, author = {Schreck, Steven and Reichert, Hannes and Hetzel, Manuel and Doll, Konrad and Sick, Bernhard}, title = {Height Change Feature Based Free Space Detection}, series = {2023 11th International Conference on Control, Mechatronics and Automation (ICCMA)}, booktitle = {2023 11th International Conference on Control, Mechatronics and Automation (ICCMA)}, publisher = {IEEE}, doi = {https://doi.org/10.1109/ICCMA59762.2023.10374705}, pages = {171 -- 176}, year = {2023}, subject = {Gabelstapler}, language = {en} } @inproceedings{ReichertHetzelHubertetal.2024, author = {Reichert, Hannes and Hetzel, Manuel and Hubert, Andreas and Doll, Konrad and Sick, Bernhard}, title = {Sensor Equivariance: A Framework for Semantic Segmentation with Diverse Camera Models}, series = {2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)}, booktitle = {2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)}, publisher = {IEEE}, doi = {https://doi.org/10.1109/CVPRW63382.2024.00132}, pages = {1254 -- 1261}, year = {2024}, subject = {Bildverarbeitung}, language = {en} } @inproceedings{KloppHaugDoerringer2024, author = {Klopp, Marco and Haug, Jim and D{\"o}rringer, Antonia}, title = {Work-in-Progress: Input Support for the Formulation of Learning Outcomes in STEM}, series = {Proceedings IEEE Educon}, volume = {2024}, booktitle = {Proceedings IEEE Educon}, publisher = {IEEE}, issn = {2165-9567}, doi = {10.1109/EDUCON60312.2024.10578568}, pages = {3}, year = {2024}, abstract = {The heightened emphasis on student-centered learning in STEM degree programs highlights the importance of precise formulation of learning outcomes. The "AdLer Input Support for the Formulation of Learning Outcomes" offers a valuable solution to meet this challenge.}, subject = {Lerntechnik}, language = {en} } @inproceedings{Schork2023, author = {Schork, Sabrina}, title = {Happiness and Innovation}, series = {1st International Conference of Happiness and Well-Being}, volume = {2023}, booktitle = {1st International Conference of Happiness and Well-Being}, year = {2023}, subject = {Innovationsmanagement}, language = {en} } @inproceedings{Schork2023, author = {Schork, Sabrina}, title = {Sustainable Digital Innovator Program Workshop}, series = {25th Transformations Conference}, volume = {2023}, booktitle = {25th Transformations Conference}, editor = {{\"O}zdemir-Kaluk, Dilan}, pages = {Dilan -- {\"O}zdemir-Kaluk}, year = {2023}, subject = {Innovationsmanagement}, language = {en} } @inproceedings{Schork2024, author = {Schork, Sabrina}, title = {From Data to Innovation}, series = {XXXV ISPIM Innovation Conference}, volume = {2024}, booktitle = {XXXV ISPIM Innovation Conference}, doi = {10.5281/zenodo.12652992}, pages = {10}, year = {2024}, abstract = {Data can be the source of innovation. Data can help to analyse the constitution of the people involved in the innovation process and to give them recommendations along the innovation process to increase their innovation performance, productivity in individual and group work and to optimise the quality of the results. The article proposes a long-term study in which the innovation potential of young adults in secondary schools, universities and companies is continuously recorded. The aim is to develop a chatbot that supports individuals in transforming their innovation potential into innovation performance, so that innovations develop that transform society. The aim is to improve the quality of innovation outcomes and the productivity of individuals involved in solving complex problems.}, subject = {Innovationsmanagement}, language = {en} } @techreport{Schork2024, type = {Working Paper}, author = {Schork, Sabrina}, title = {GenAI as a collaborative creativity booster for innovation}, doi = {10.5281/zenodo.13281421}, pages = {2}, year = {2024}, abstract = {GenAI has the potential to enhance individual creativity but may also reduce the diversity of collective content. When combined with human interaction, GenAI can lead to more creative outcomes. This is particularly relevant in collaborative work.}, subject = {Innovationsmanagement}, language = {en} } @inproceedings{SommerSafiEsenetal.2024, author = {Sommer, David and Safi, Abdulrahman and Esen, Cemal and Hellmann, Ralf}, title = {Additive manufacturing of Nickel-based superalloy: optimization of surface roughness using integrated high-speed milling}, series = {Laser 3D Manufacturing XI}, booktitle = {Laser 3D Manufacturing XI}, editor = {Gu, Bo and Chen, Hongqiang}, publisher = {SPIE}, doi = {http://dx.doi.org/10.1117/12.3000972}, year = {2024}, subject = {Hochgeschwindigkeitsfr{\"a}sen}, language = {en} } @inproceedings{SommerHornungEsenetal.2024, author = {Sommer, David and Hornung, Simon and Esen, Cemal and Hellmann, Ralf}, title = {Optimization of mechanical properties of additive manufactured IN 718 parts combining LPBF and in-situ high-speed milling}, series = {Laser 3D Manufacturing XI}, booktitle = {Laser 3D Manufacturing XI}, editor = {Gu, Bo and Chen, Hongqiang}, publisher = {SPIE}, doi = {http://dx.doi.org/10.1117/12.3000952}, year = {2024}, subject = {Hochgeschwindigkeitsfr{\"a}sen}, language = {en} } @article{SommerHornungEsenetal.2024, author = {Sommer, David and Hornung, Simon and Esen, Cemal and Hellmann, Ralf}, title = {Surface roughness optimization of hybrid PBF-LB/M-built Inconel 718 using in situ high-speed milling}, series = {The International Journal of Advanced Manufacturing Technology}, volume = {132}, journal = {The International Journal of Advanced Manufacturing Technology}, number = {3-4}, publisher = {Springer Science and Business Media LLC}, issn = {0268-3768}, doi = {http://dx.doi.org/10.1007/s00170-024-13382-5}, pages = {1741 -- 1751}, year = {2024}, abstract = {AbstractWe report on the optimization of the surface roughness of hybrid additive manufactured Ni superalloys, combining a conventional laser powder bed fusion process with in situ high-speed milling. This remarkable hybrid approach has only recently been applied to different steel types and barely to Ni superalloys which opposite to steel appear to be challenging for milling processes, particularly within the powderbed of laser powder bed fusion. Different influencing factors on the surface roughness are varied in this study, following the Taguchi method. Their effect is evaluated with respect to the average surface roughness and the maximum surface roughness. The signal-to-noise ratio for the varied parameters infeed, z-pitch, feed rate, and spindle speed is calculated, determining their relevance on the surface roughness, and defining an optimal parameter combination. As the surface quality is optimized to \$\$\varvec{R_a=0.47\, \mu m}\$\$ R a = 0.47 μ m , the definition of the optimal parameter combination is of the highest relevance for the application of this novel manufacturing approach for Inconel. Using linear regression, the resulting surface roughness of these parameters is predicted, getting validated by the experimental evaluation. Due to a further analysis, including EDX analysis and a quantitative element analysis at different positions of the flank of the milling cutter, wear characteristics as well as the dissipation of the coating of the milling cutter are detected. The flank wear and the resulting breakage of the cutting edge are defined as the main reasons of a rising surface roughness.}, subject = {Hochgeschwindigkeitsfr{\"a}sen}, language = {en} } @article{SommerStockfleetHellmann2024, author = {Sommer, David and Stockfleet, Henry and Hellmann, Ralf}, title = {Optimization of Mechanical Properties and Evaluation of Fatigue Behavior of Selective Laser Sintered Polyamide-12 Components}, series = {Polymers}, volume = {16}, journal = {Polymers}, number = {10}, publisher = {MDPI AG}, issn = {2073-4360}, doi = {http://dx.doi.org/10.3390/polym16101366}, year = {2024}, abstract = {In this paper, a comprehensive study of the mechanical properties of selective laser sintered polyamide components is presented, for various different process parameters as well as environmental testing conditions. For the optimization of the static and dynamic mechanical load behavior, different process parameters, e.g., laser power, scan speed, and build temperature, were varied, defining an optimal parameter combination. First, the influence of the different process parameters was tested, leading to a constant energy density for different combinations. Due to similarities in mechanical load behavior, the energy density was identified as a decisive factor, mostly independent of the input parameters. Thus, secondly, the energy density was varied by the different parameters, exhibiting large differences for all levels of fatigue behavior. An optimal parameter combination of 18 W for the laser power and a scan speed of 2666 mm/s was determined, as a higher energy density led to the best results in static and dynamic testing. According to this, the variation in build temperature was investigated, leading to improvements in tensile strength and fatigue strength at higher build temperatures. Furthermore, different ambient temperatures during testing were evaluated, as the temperature-dependent behavior of polymers is of high importance for industrial applications. An increased ambient temperature as well as active cooling during testing was examined, having a significant impact on the high cycle fatigue regime and on the endurance limit.}, subject = {Laserstrahlsintern}, language = {en} } @article{WeberPedellRoetzel2024, author = {Weber, Max M. and Pedell, Burkhard and R{\"o}tzel, Peter}, title = {Resilience-oriented management control systems: a systematic review of the relationships between organizational resilience and management control systems}, series = {Journal of Management Control}, journal = {Journal of Management Control}, publisher = {Springer Science and Business Media LLC}, issn = {2191-4761}, doi = {10.1007/s00187-024-00385-2}, year = {2024}, abstract = {Organizations regularly face serious challenges due to pandemics, recessions, and financial crises. One reason some organizations cope better than others may be that their management control systems (MCSs) more effectively foster organizational resilience. Despite considerable literature on MCSs and organizational resilience, there is a lack of research on the impact of an MCS's use on organizational resilience. This study examines and bridges the literatures on MCSs and organizational resilience to illuminate how organizations can better cope with adversity. To identify potential relationships between management controls, MCSs, and organizational resilience, we systematically review the literature and perform a content analysis. We examine the relationships between organizational resilience measures, capabilities, and management controls. We propose the use of resilience-oriented management controls and discuss whether organizations can increase their resilience by building resilience-oriented MCSs. Based on Simons's levers of control framework and Duchek's capability-based conceptualization of organizational resilience, we develop a conceptual organizational resilience/MCS framework. Our study reveals relationships and gaps between the literatures on MCSs and organizational resilience and proposes avenues for future research. Our findings suggest that resilience-oriented MCSs are beneficial to organizational resilience.}, subject = {Management}, language = {en} } @incollection{Link2024, author = {Link, Renate}, title = {LEGO® Serious Play® (LSP) oder PLAYMOBIL®pro}, series = {Interkulturelle Kompetenz online vermitteln}, booktitle = {Interkulturelle Kompetenz online vermitteln}, editor = {Hiller, Gundula Gwenn and Zillmer-Tantan, Ulrike and Fatthohi, Reema}, edition = {1}, publisher = {Springer VS}, address = {Wiesbaden}, isbn = {978-3-658-40408-6}, issn = {978-3-658-40409-3}, doi = {https://doi.org/10.1007/978-3-658-40409-3_54}, pages = {467 -- 471}, year = {2024}, abstract = {Diese {\"U}bung basiert auf konstruktivistischem und haptischem „Denken" mit den H{\"a}nden. Die TN sollen mit geeigneten Materialien wie LEGO® Serious Play® (LSP) oder PLAYMOBIL®pro Metaphern bzw. Personas f{\"u}r kulturelle Werte/Dimensionen/Standards bauen.}, subject = {Hochschule}, language = {de} } @article{SchorkOezdemirKalukZerey2024, author = {Schork, Sabrina and {\"O}zdemir-Kaluk, Dilan and Zerey, Cudi}, title = {Understanding Innovation and Sustainability in Digital Organizations: A Mixed-Method Approach}, series = {Sustainability}, volume = {2024}, journal = {Sustainability}, number = {17}, editor = {Chen, Ja-Shen}, doi = {https://doi.org/10.3390/su17020415}, pages = {415}, year = {2024}, abstract = {In recent years, organizations have increasingly turned to digital transformation (D) to drive innovation (I) and sustainability (S). However, the rapid growth of studies on this topic, particularly since 2019, has made it challenging to clearly define these concepts, operationalize their constructs, and understand their positive organizational impacts. This article addresses these gaps through a systematic literature review (SLR) that combines quantitative and qualitative analysis. This study begins with a comprehensive bibliometric analysis of 3099 articles published between 2010 and 2023 in the Scopus database containing the terms "digital," "innovation," and "sustainability" (or "sustainable"). It then covers a detailed qualitative review of 20 high-quality articles from VHB-JOURQUAL-C-ranked journals or higher. By employing an inductive-deductive approach, the authors identify consistent and conflicting definitions, diverse constructs for each D-I-S concept, and numerous positive organizational effects. This article provides a structured overview of existing D-I-S definitions and introduces a model to distinguish environmental, organizational, and solution levels. Additionally, it presents a visual framework of the direct and mediated positive effects of D-I-S in organizations. Overall, these insights underscore the critical role of digital transformation in advancing innovation and sustainability, offering valuable guidance for researchers and practitioners alike.}, subject = {Nachhaltigkeit}, language = {en} } @incollection{Schork, author = {Schork, Sabrina}, title = {Sustainable Business Model Canvas}, series = {Creative Methods Toolkid}, volume = {2024}, booktitle = {Creative Methods Toolkid}, editor = {Julia, Bentz and Jelena Ristić, Trajković}, isbn = {978-972-9347-64-1}, doi = {https://doi.org/10.5281/zenodo.14000111}, pages = {239 -- 242}, abstract = {Imagining, designing and teaching regenerative futures is challenging. Educators often lack approaches that allow them to address the complexities of global challenges through new narratives, which make space for the imagination of desirable futures. Commonly in education, we retell the story of an apocalyptic future when speaking about global challenges such as biodiversity degradation and climate change. This narrative, which focuses on the risks and dangers of global environmental change, is built on the assumption that the induced fear might lead to action. This toolkit supports educators who wish to follow a different route. It is based on the assumption that "we can't create what we cannot imagine" (quote by Lucile Clifton). Consequently, imagining, designing, and teaching regenerative futures is the basis and starting point for actualizing them. The beginning of fundamental change is often hard to track because it first takes place in our minds. Visible, large-scale change arises from invisible, wild ideas and imaginations. According to the philosopher and educator John Dewey, imagination is "the ability to look at things as if they could be otherwise". This ability to ask "what if?" is central to envisioning and enacting better lives. The lack of broad-scale action towards regenerative ways of living can be seen as a lack of imagination to create shared visions of an alternative future. Collectively envisioning desirable futures provides the motivation and guidance for change, or as the poet Rainer Maria Rilke put it: "the future enters into us, in order to transform itself in us, long before it happens." This toolkit introduces a broad variety of creative and arts-based methods for regeneration and transformation that can be used in various educational settings. It harnesses the power of creative and arts-based practices, which are increasingly seen as a means of expanding future imaginaries and supporting the development of new scenarios of transformative change. The toolkit was developed within the COST Action SHiFT Social Sciences and Humanities for social transformation and climate change as an initiative of Working Group 3: Creative Practices and Outreach. It comprises a selection of 68 creative methods brought together in a collaborative effort by 124 authors from 31 countries and 6 continents. Its intention is to comprise a valuable resource for educators, teachers, lecturers, community workers, and change-makers who are aiming to empower their learners while providing competencies in regenerative design, climate action, futures thinking, human-nature connection, wellbeing and community engagement. This toolkit is more than a collection of methods but a call to action and a comprehensive resource developed through the synergistic efforts of contributors worldwide.}, subject = {Hochschulunterricht}, language = {de} } @book{Schork2025, author = {Schork, Sabrina}, title = {Future Skills an Hochschulen: Ein Spannungsfeld?}, editor = {Schork, Sabrina}, publisher = {Beltz Juventa}, address = {Weinheim}, isbn = {978-3-7799-8762-8}, pages = {207}, year = {2025}, abstract = {Das Buch richtet sich an Hochschullehrende, die Future Skills verstehen und vermitteln m{\"o}chten. Ziel ist eine pr{\"a}zise Definition dieser Kompetenzen, abgeleitet aus etablierten Frameworks, die Future Skills als essentiell f{\"u}r eine sich wandelnde Welt beschreiben. Es beleuchtet die Aufgaben der Hochschulen und unterschiedliche Perspektiven von Lehrenden und Studierenden. Projekte an verschiedenen Hochschulen bieten Einblicke in die praktischen Herausforderungen und Erkenntnisse. Ein unverzichtbarer Leitfaden f{\"u}r die aktive Gestaltung von Lehre und Hochschulentwicklung.}, subject = {Hochschulunterricht}, language = {de} } @book{OPUS4-2454, title = {Vertrauen in K{\"u}nstliche Intelligenz}, editor = {Schork, Sabrina}, publisher = {Springer Vieweg}, isbn = {978-3-658-43816-6}, doi = {https://doi.org/10.1007/978-3-658-43816-6}, pages = {VIII, 302 S.}, year = {2024}, abstract = {Der vorliegende Band markiert einen initialen Schritt zur umfassenden Er{\"o}rterung des Themenfelds ‚Vertrauen in KI' aus vielf{\"a}ltigen Blickwinkeln. Dabei wird eine Herangehensweise sowohl aus wirtschafts- und sozialwissenschaftlicher als auch aus informationstechnischer Perspektive gew{\"a}hlt, die zudem interdisziplin{\"a}re Aspekte einbezieht. Insgesamt pr{\"a}sentiert der Band f{\"u}nfzehn Beitr{\"a}ge von 25 renommierten Autorinnen und Autoren, die ihre Expertise aus vierzehn unterschiedlichen Einrichtungen einbringen. Ziel dieser Debatten ist es, Lernende, Lehrende, Forschende sowie Entscheidungstr{\"a}gerinnen und -tr{\"a}ger aus Politik und Wirtschaft dazu zu bef{\"a}higen, auf Basis von Fakten eine fundierte Meinung zu bilden. Auf dieser Grundlage sollen sie in der Lage sein, gut durchdachte pers{\"o}nliche Entscheidungen im Umgang mit KI zu treffen.}, subject = {K{\"u}nstliche Intelligenz}, language = {de} } @article{AgelLarsen2024, author = {Agel, Lena and Larsen, Valerie}, title = {Innovative Lehr- und Lernformen (2): Digitale Lernformate}, series = {Hebamme}, volume = {37}, journal = {Hebamme}, number = {04}, publisher = {Georg Thieme Verlag KG}, issn = {0932-8122}, doi = {10.1055/a-2351-6937}, pages = {14 -- 17}, year = {2024}, subject = {Hebamme}, language = {de} } @article{AgelWind2024, author = {Agel, Lena and Wind, Carolin}, title = {Arbeits- und Lernaufgaben im Hebammenstudium}, series = {Hebamme}, volume = {37}, journal = {Hebamme}, number = {05}, publisher = {Georg Thieme Verlag KG}, issn = {0932-8122}, doi = {10.1055/a-2363-1591}, pages = {14 -- 19}, year = {2024}, subject = {Hebamme}, language = {de} } @article{AgelPfeifenbergerMerbtetal.2024, author = {Agel, Lena and Pfeifenberger, Hemma and Merbt, Jeanette and Wind, Carolin}, title = {Online-Befragung zur aktuellen Situation der Praxisanleiter*innen und Herausforderungen in Deutschland}, series = {Hebamme}, volume = {37}, journal = {Hebamme}, number = {06}, publisher = {Georg Thieme Verlag KG}, issn = {0932-8122}, doi = {10.1055/a-2405-2302}, pages = {12 -- 18}, year = {2024}, subject = {Hebamme}, language = {de} } @inproceedings{FlachsBernhardThielemann2024, author = {Flachs, Dennis and Bernhard, Levin and Thielemann, Christiane}, title = {Fully 3D-Printed Rotational Energy Harvester Based On Bipolar Charged PLA Electrets}, series = {Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)}, volume = {2024}, booktitle = {Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)}, publisher = {IEEE}, isbn = {979-8-3503-8020-0}, doi = {979-8-3503-8020-0}, year = {2024}, abstract = {Rotational energy harvesters have emerged as a promising solution for sustainable power generation in a variety of applications, ranging from small-scale devices to large-scale industrial systems. In this work, we present a fully 3D-printed electret rotational harvester based on the biodegradable and compostable polymer polylactic acid (PLA). The 3D-printed harvester consists of a rotor made from a bipolar-charged PLA electret, electrode pairs of conductive PLA that function as the stator, and a PLA bearing. An output power of 61μ W was achieved at a rotational speed of 400 rpm and a load resistance of 28.2MΩ. To assess the durability of the harvester, particularly the 3D-printed bearing, the extent of mechanical wear was examined after one million rotations at a rotational speed of 400 rpm. The findings indicate that the rollers undergo a 1.2\% loss in mass, yet the functionality remains intact. The charge decay of PLA electrets is influenced by external factors such as elevated humidity and temperature. Future research will focus on improving the charge stability of PLA by addressing these factors, expanding the potential applications of this rotational energy harvester.}, subject = {Elektret}, language = {en} } @inproceedings{DoehringStanikPregleretal.2024, author = {D{\"o}hring, Thorsten and Stanik, Eva and Pregler, Jan and Stollenwerk, Manfred and Hildenbrand, Georg}, title = {Forschung zu Strahlensch{\"a}den mit dem Stratosph{\"a}renballon-Experiment ASTRABAX}, series = {DGaO-Proceedings}, volume = {2024}, booktitle = {DGaO-Proceedings}, number = {125}, pages = {1 -- 2}, year = {2024}, abstract = {Das Stratosph{\"a}renballon-Experiment ASTRABAX ist als multimodale Plattform der Material- und Biowissenschaften f{\"u}r Untersuchungen bei extremen Strahlenbelastungen konzipiert, mit Fokus auf dem UV-C-Spektralbereich und der kosmischen H{\"o}henstrahlung. Auswirkungen von Kombinationen aus hoch- und niederenergetischer Strahlung sind relevant, jedoch nicht ausreichend erforscht.}, subject = {Stratosph{\"a}ren-Ballon}, language = {de} } @inproceedings{ErmilovaHertwigDoehringetal.2024, author = {Ermilova, Elena and Hertwig, Andreas and D{\"o}hring, Thorsten and Stanik, Eva and Cotroneo, Vincenzo and Gibertini, Eugenio}, title = {Ellipsometrische Charakterisierung von Polydopamin f{\"u}r funktionelle technische Schichten}, series = {DGaO-Proceedings}, volume = {2024}, booktitle = {DGaO-Proceedings}, number = {125}, pages = {1 -- 2}, year = {2024}, abstract = {D{\"u}nne Schichten aus dem bionischen Material Polydopamin (PDA) sind heute zunehmend auch f{\"u}r innovative technische Anwendungen von Interesse. Mittels spektroskopischer Ellipsometrie wurde die dielektrische Funktion von PDA vom ultravioletten bis zum nahen infraroten Spektralbereich vermessen. {\"U}ber ein Modell wurde auch die Dicke dieser selbstorganisierenden Schichten bestimmt.}, subject = {D{\"u}nne Schicht}, language = {de} } @inproceedings{StanikDoehringPregleretal.2024, author = {Stanik, Eva and D{\"o}hring, Thorsten and Pregler, Jan and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {Ein Besucherexperiment zur astronomischen R{\"o}ntgenoptik f{\"u}r das Deutsche R{\"o}ntgen-Museum}, series = {DGaO-Proceedings}, volume = {2024}, booktitle = {DGaO-Proceedings}, number = {125}, pages = {1 -- 2}, year = {2024}, abstract = {Im Rahmen eines gemeinsamen Entwicklungsprojekts entsteht ein neues Besucherexperiment zur astronomischen R{\"o}ntgenoptik, das im Museumslabor R{\"o}Lab im Deutschen R{\"o}ntgen-Museum aufgebaut werden soll. Das Ziel des interaktiven Exponats ist es, Begeisterung f{\"u}r die faszinierende Welt der R{\"o}ntgenastronomie zu wecken und das Berufsbild eines Astronomen zu vermitteln.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {de} } @book{Borgeest2024, author = {Borgeest, Kai}, title = {Manipulation of Exhaust Gas Values}, publisher = {Springer Vieweg}, address = {Wiesbaden}, isbn = {978-3-658-45863-8}, doi = {10.1007/978-3-658-45864-5}, pages = {128}, year = {2024}, abstract = {This booklet presents background information on the exhaust gas scandal, e. g. pollutants, engine control units, exhaust gas recirculation, exhaust gas aftertreatment, which driving cycles are used for testing, how manipulations on the test bench are possible and in which legal and political environment this happened unnoticed. Measures are presented, how vehicles can comply with legal limits and how manipulations can be prevented legally and politically in future.}, subject = {Kraftfahrzeug}, language = {en} } @article{SchaeferHildenbrandHausmann2024, author = {Sch{\"a}fer, Myriam and Hildenbrand, Georg and Hausmann, Michael}, title = {Impact of Gold Nanoparticles and Ionizing Radiation on Whole Chromatin Organization as Detected by Single-Molecule Localization Microscopy}, series = {International Journal of Molecular Sciences}, volume = {25}, journal = {International Journal of Molecular Sciences}, number = {23}, publisher = {MDPI AG}, issn = {1422-0067}, doi = {https://doi.org/10.3390/ijms252312843}, year = {2024}, abstract = {In radiation tumor therapy, irradiation, on one hand, should cause cell death to the tumor. On the other hand, the surrounding non-tumor tissue should be maintained unaffected. Therefore, methods of local dose enhancements are highly interesting. Gold nanoparticles, which are preferentially uptaken by very-fast-proliferating tumor cells, may enhance damaging. However, the results in the literature obtained from cell culture and animal tissue experiments are very contradictory, i.e., only some experiments reveal increased cell killing but others do not. Thus, a better understanding of cellular mechanisms is required. Using the breast cancer cell model SkBr3, the effects of gold nanoparticles in combination with ionizing radiation on chromatin network organization were investigated by Single-Molecule Localization Microscopy (SMLM) and applications of mathematical topology calculations (e.g., Persistent Homology, Principal Component Analysis, etc.). The data reveal a dose and nanoparticle dependent re-organization of chromatin, although colony forming assays do not show a significant reduction of cell survival after the application of gold nanoparticles to the cells. In addition, the spatial organization of γH2AX clusters was elucidated, and characteristic changes were obtained depending on dose and gold nanoparticle application. The results indicate a complex response of ALU-related chromatin and heterochromatin organization correlating to ionizing radiation and gold nanoparticle incorporation. Such complex whole chromatin re-organization is usually associated with changes in genome function and supports the hypothesis that, with the application of gold nanoparticles, not only is DNA damage increasing but also the efficiency of DNA repair may be increased. The understanding of complex chromatin responses might help to improve the gold nanoparticle efficiency in radiation treatment.}, subject = {Krebs, Medizin}, language = {en} }