@article{Blasek2023, author = {Blasek, Katrin}, title = {KI-Regulierung in der Volksrepublik China}, series = {Recht Digital}, volume = {2023}, journal = {Recht Digital}, number = {12}, publisher = {Beck}, issn = {2702-2404}, pages = {557 -- 564}, year = {2023}, language = {de} } @article{Blasek2024, author = {Blasek, Katrin}, title = {Anlasslose Parallelverarbeitung von Restschuldbefreiungen?}, series = {Zeitschrift f{\"u}r das Recht der digitalen Wirtschaft}, volume = {2024}, journal = {Zeitschrift f{\"u}r das Recht der digitalen Wirtschaft}, number = {4}, publisher = {Wolters Kluwer}, issn = {2702-4040}, pages = {115 -- 118}, year = {2024}, language = {de} } @article{KhuntsariaGachechiladzeLipartaetal.2025, author = {Khuntsaria, Irakli and Gachechiladze, Konstantine and Liparta, Elene and Kobulashvili, Tamar and Jorbenadze, Mariam and Revazishvili, Tamaz and Mamiseishvili, Ana and Kekelia, Elene and Topuridze, Marina and Sturua, Lela and Schrader, Thomas and Kldiashvili, Ekaterina}, title = {Strategic implementation of HPV vaccination to eliminate cervical cancer in Georgia}, series = {Public Health in Practice}, volume = {2025}, journal = {Public Health in Practice}, number = {10}, publisher = {Elsevier}, doi = {10.1016/j.puhip.2025.100679}, pages = {1 -- 4}, year = {2025}, abstract = {Objectives Human Papillomavirus (HPV) is a prevalent sexually transmitted infection and a leading cause of cervical cancer. In Georgia, cervical cancer ranks as the fifth most common cancer among women, with approximately 330 new cases and 200 deaths reported annually. Despite the availability of effective HPV vaccines, national vaccination coverage remains low. This study aimed to evaluate HPV vaccination coverage, analyze cervical cancer incidence trends, and model the potential impact of increased vaccination uptake on cancer prevention outcomes in Georgia. Study design A retrospective observational study was conducted using national health registry data and modeling projections to assess the burden of cervical cancer and estimate the effect of scaled vaccination coverage. Methods National health databases were used to analyze HPV vaccination rates and cervical cancer incidence. Descriptive statistics, chi-square tests, and linear regression were applied to identify trends and disparities. Additionally, a dynamic transmission model was developed to simulate the 10-year impact of increasing HPV vaccination coverage on cervical cancer incidence. Results The crude cervical cancer incidence rate was 15.7 per 100,000 women, with an age-standardized rate of 10.6 per 100,000. In 2022, only 38 \% of eligible girls aged 13-18 received the first HPV vaccine dose, and 26 \% completed the second dose. Regional disparities in vaccination and screening were noted, and overall screening coverage declined to 13,890 women screened in 2022. Modeling showed that increasing vaccine coverage to 60 \% could reduce cervical cancer incidence by 50 \% (preventing ∼163 cases); coverage of 80 \% and 90 \% could reduce incidence by 70 \% and 85 \%, preventing 228 and 276 cases, respectively. Conclusion Low HPV vaccination uptake in Georgia (38 \% first dose and 26 \% dull coverage) and declining screening limit cervical cancer prevention. Modeling shows that increasing vaccination coverage to 60-90 \% could prevent 163-276 cases over the next decade. Strengthening vaccination and screening strategies is essential to move forward elimination.}, language = {en} } @inproceedings{Blasek2025, author = {Blasek, Katrin}, title = {Umbruch in der Scorewelt - Zur Transparenz-Initiative der Schufa}, series = {Digitalregulierung in der Bew{\"a}hrung : was bringt das neue Recht? : Tagungsband DSRI-Herbstakademie 2025}, volume = {2025}, booktitle = {Digitalregulierung in der Bew{\"a}hrung : was bringt das neue Recht? : Tagungsband DSRI-Herbstakademie 2025}, editor = {Bernzen, Anna and Heinze, Christian and Steinr{\"o}tter, Bj{\"o}rn}, publisher = {Beck}, isbn = {978-3-406-84186-6}, pages = {491 -- 510}, year = {2025}, language = {de} } @book{BurgerMenzel2025, author = {Burger-Menzel, Bettina}, title = {Multiperspektivische {\"O}konomik: Menschenbilder - Systemans{\"a}tze - Steuerungsideen}, edition = {1}, publisher = {Springer}, isbn = {978-3-658-48617-4}, doi = {10.1007/978-3-658-48617-4}, pages = {XIX, 460}, year = {2025}, abstract = {Wie gelingt Zukunftsf{\"a}higkeit in einer komplexen Welt? Unsere Welt ist im Wandel - technologisch, global, {\"o}kologisch. Selbst Handlungskonzepte wie das "gr{\"u}ne Wachstum" wirken zunehmend unsicher, vor allem auf einem Planeten mit begrenzten Ressourcen und wachsender Weltbev{\"o}lkerung. Dieses Lehrbuch l{\"a}dt dazu ein, neue Perspektiven zu gewinnen: Wie k{\"o}nnen sich Unternehmen und Standorte zukunftsf{\"a}hig ausrichten? Und: Was m{\"u}ssen wir aus Sicht der Volkswirtschaftslehre - disziplin{\"a}r und interdisziplin{\"a}r - hierf{\"u}r {\"u}ber komplex adaptive Systeme lernen? Das erforderliche Komplexit{\"a}tsverst{\"a}ndnis wird in drei Teilen Schritt f{\"u}r Schritt entwickelt und mit Blick auf die Nachhaltigkeit anwendungsbezogen veranschaulicht. Teil 1 bietet inspirierende Einblicke in die Vielfalt menschlicher Handlungsweisen, vom rationalen bis zum vielschichtigen Menschen, der sich von Narrativen, Emotionen und kognitiven Verzerrungen beeinflussen l{\"a}sst. Teil 2 sieht den Menschen als Systemelement bzw. Akteur und beleuchtet systemische Wechselwirkungen bei zunehmendem Komplexit{\"a}tsgrad. Die Vorstellungen von einem "guten Leben" wandeln sich, von materiellen Lebensstandards und sozialer Gerechtigkeit hin zu Krisenresilienz und transformativer Leistungsf{\"a}higkeit. Teil 3 stellt Ideen vor, wie die Governance menschengemachter Systeme mittels Regulierung, Kulturentwicklung und Nudging gelingen kann, wenn wir von der Partizipation in Wissens- und Lernnetzwerken und potenzieller Selbstwirksamkeit ausgehen. Das Buch bietet Impulse f{\"u}r Lehre, Forschung und Praxis. Es eignet sich nicht nur f{\"u}r Studierende und Lehrende der Volkswirtschaftslehre. Es er{\"o}ffnet auch Lehrenden der Sekundarstufe und Erwachsenenbildung neue Sichten sowie denjenigen, die in Wirtschaft, Verb{\"a}nden, Politik, Verwaltung oder in zivilgesellschaftlichen Organisationen beratend aktiv sind. Kurzum: Ein Buch f{\"u}r alle, die systemischen Wandel nicht nur verstehen, sondern mitgestalten wollen.}, language = {de} } @article{LevinaLindauerRevina2025, author = {Levina, Olga and Lindauer, Friederike and Revina, Aleksandra}, title = {A Participatory Workshop Design for Engaging Young People in IT Sustainability}, series = {Education Science}, journal = {Education Science}, number = {15 (12)}, publisher = {MDPI}, doi = {10.3390/educsci15121570}, pages = {23}, year = {2025}, abstract = {This paper presents an approach to teaching and consolidating skills in the context of sustainability "Prototyping Sustainability-Designing Sustainable IT" (ProS), using the workshop format for participatory and creative learning. The workshop integrates principles from Education for Sustainable Development (ESD), transformative and experiential learning, participatory design, and critical reflection on the digital age to engage participants in critically examining the environmental, economic, and social impacts of digital technologies in the context of Sustainable Development Goals (SDGs). Structured in five modular phases, from self-reflection and knowledge activation to collaborative prototyping and peer evaluation, the workshop offers a hands-on, gamified learning experience centred on real-world sustainability challenges. Learners create user-centred paper-based prototypes for digital products using tactile materials, persona-driven scenarios and knowledge of sustainable product characteristics gained in the workshop. Outcome measurement is supported through pre- and post-workshop surveys, peer voting templates, and paper-based prototype artefacts, enabling rich insight into behavioural intentions and learning gains. The paper discusses the educational value and sustainability relevance of the workshop engaging young people in critically reflecting on the environmental, economic, and social consequences of digitalization. Finally, it highlights challenges and limitations and proposes directions for future research.}, language = {en} } @article{WereteckiSharmaKristal2025, author = {Weretecki, Patrick and Sharma, Ipshita and Kristal, Samuel}, title = {Unlocking the secrets of award-winning retail store design - The case of Deutsche Telekom in Germany}, series = {transfer - Zeitschrift f{\"u}r Kommunikation und Markenmanagement}, volume = {71}, journal = {transfer - Zeitschrift f{\"u}r Kommunikation und Markenmanagement}, number = {4}, publisher = {Deutsche Werbewissenschaftliche Gesellschaft e.V.}, year = {2025}, abstract = {Despite the rise of digital sales channels, Deutsche Telekom continues to invest heavily in its physical retail operations. This case study demonstrates how the company leverages stores as strategic innovation hubs that extend far beyond their traditional sales function. The analysis highlights the role of store design, technological integration, and symbolic branding as key drivers of customer experience and brand equity. Flagship stores serve as a testing ground for testing new concepts, while local adaptations strengthen cultural relevance within communities. Findings suggest that in highly digital industries, physical retail remains strategically valuable - not as a relic of the past, but as a platform for differentiation, customer engagement, and innovation. Properly designed, physical stores complement digital channels and reinforce the overall brand experience.}, language = {en} } @inproceedings{Blasek2024, author = {Blasek, Katrin}, title = {Datenschutzrechtliche Aspekte der geplanten EU-ID-Wallet}, series = {Das IT-Recht vor der (europ{\"a}ischen) Zeitenwende? : Tagungsband Herbstakademie 2023}, volume = {2023}, booktitle = {Das IT-Recht vor der (europ{\"a}ischen) Zeitenwende? : Tagungsband Herbstakademie 2023}, editor = {Bernzen, Anna and Fritzsche, J{\"o}rg and Heinze, Christian and Thomsen, Oliver}, publisher = {OlWIR Verlag f{\"u}r Wirtschaft, Informatik und Recht}, isbn = {978-3-95599-077-0}, pages = {73 -- 90}, year = {2024}, language = {de} } @article{Blasek2020, author = {Blasek, Katrin}, title = {Chinesischer evergreen: bad faith-Marken in China}, series = {MarkenR - Zeitschrift f{\"u}r deutsches, europ{\"a}isches und internationales Kennzeichenrecht}, volume = {2020}, journal = {MarkenR - Zeitschrift f{\"u}r deutsches, europ{\"a}isches und internationales Kennzeichenrecht}, number = {2}, publisher = {Wolters Kluwer}, pages = {62 -- 63}, year = {2020}, language = {de} } @article{Blasek2020, author = {Blasek, Katrin}, title = {Covid-19-Contact-Tracing-Apps - Leitlinien des EDSA}, series = {ZD-Aktuell}, volume = {2020}, journal = {ZD-Aktuell}, number = {9}, publisher = {Beck}, year = {2020}, language = {de} } @article{Blasek2021, author = {Blasek, Katrin}, title = {Digitalisierungspotentiale bei der Betriebsratswahl}, series = {Betriebs-Berater}, volume = {76}, journal = {Betriebs-Berater}, number = {49}, publisher = {Fachmedien Recht und Wirtschaft, dfv Mediengruppe}, address = {Framkfurt am Main}, pages = {2932 -- 2937}, year = {2021}, language = {de} } @article{MushunuriAdesojiKrauseetal.2025, author = {Mushunuri, Ashwini and Adesoji, Oluyomi and Krause, Roland and May, Patrick and Lerche, Holger and Becker, Albert and Grimm, Daniela and Nothnagel, Michael and Schulz, Herbert}, title = {Genetic risk factor identification for common epilepsies guided by integrative omics data analysis}, series = {Epilepsia}, journal = {Epilepsia}, publisher = {Wiley}, doi = {10.1111/epi.70021}, pages = {15}, year = {2025}, abstract = {Objective Genetic generalized epilepsies (GGEs) comprise the most common genetically determined epilepsy syndromes, following a complex mode of inheritance. Although many important common and rare genetic factors causing or contributing to these epilepsies have been identified in the past decades, many features of the genetic architecture are still insufficiently understood. This study integrates genome-wide association study (GWAS) data from the International League Against Epilepsy Consortium on Complex Epilepsies with transcriptome-wide association studies to identify genes whose genetically regulated expression levels are associated with epilepsy. Methods To achieve this, we used multiple computational approaches, including MAGMA, a tool for gene analysis of GWAS data, and its derivatives E-MAGMA and H-MAGMA, to improve gene mapping accuracy by utilizing tissue-specific expression and chromatin interaction data. Furthermore, we developed ME-MAGMA to incorporate methylation quantitative trait loci data, providing insights into epigenetic factors. Results We identified a total of 897 false discovery rate-corrected (<.05) candidates. These include voltage-gated calcium channels, voltage-gated potassium channels, and other genes such as NPRL2, CACNB2, and KCNT1 associated with epilepsy pathogenesis that act as key players in neuronal communication and signaling in the brain. Significance In this study, we propose new candidate genes to expand the dataset of potential epilepsy-causing genes. Further research on these genes may enhance our understanding of the complex regulatory mechanisms underlying GGE and other types of epilepsy, potentially revealing targets for therapeutic intervention.}, language = {en} } @article{RizunRevinaEdelmann2025, author = {Rizun, Nina and Revina, Aleksandra and Edelmann, Noella}, title = {Text analytics for co-creation in public sector organizations: a literature review-based research framework}, series = {Artificial Intelligence Review}, journal = {Artificial Intelligence Review}, doi = {10.1007/s10462-025-11112-1}, pages = {1 -- 45}, year = {2025}, abstract = {The public sector faces considerable challenges that stem from increasing external and internal demands, the need for diverse and complex services, and citizens' lack of satisfaction and trust in public sector organisations (PSOs). An alternative to traditional public service delivery is the co-creation of public services. Data analytics has been fueled by the availability of immense amounts of data, including textual data, and techniques to analyze data, so it has immense potential to foster data-driven solutions for the public sector. In the paper, we systematically review the existing literature on the application of Text Analytics (TA) techniques on textual data that can support public service co-creation. In this review, we identify the TA techniques, the public services and the co-creation phase they support, as well as envisioned public values for the stakeholder groups. On the basis of the analysis, we develop a Research Framework that helps to structure the TA-enabled co-creation process in PSOs, increases awareness among public sector organizations and stakeholders on the significant potential of TA in creating value, and provides scholars with some avenues for further research.}, language = {en} } @article{PilgermannVielhauerPetrovetal.2025, author = {Pilgermann, Michael and Vielhauer, Claus and Petrov, Denis and Dittmann, Jana and Kr{\"a}tzer, Christian}, title = {Attribution im IT-Grundschutz des BSI: Ausweitung der Detektion von Cyberangriffen im IT-Sicherheitsprozess}, series = {Datenschutz und Datensicherheit (DuD)}, volume = {49}, journal = {Datenschutz und Datensicherheit (DuD)}, number = {11}, publisher = {Springer}, doi = {10.1007/s11623-025-2173-5}, pages = {731 -- 736}, year = {2025}, abstract = {Inzwischen hat sich die Einsicht durchgesetzt, dass Cyberangriffe nicht komplett verhindert werden k{\"o}nnen. Stattdessen sollen die m{\"o}glichen Auswirkungen von Vorf{\"a}llen sinnvoll reduziert werden. Damit steigt die Bedeutung der Erkennung von Sicherheitsvorf{\"a}llen, um schnell reagieren und das Schadensausmaß begrenzen zu k{\"o}nnen. Damit die Fortschritte bei der Erkennung k{\"u}nftig auch in der Praxis angewendet werden k{\"o}nnen, ist eine Verankerung in den entsprechenden Vorgehensweisen erforderlich. Dies erfolgt nachfolgend am Beispiel des IT-Grundschutzes, dessen Methoden in der deutschsprachigen IT-Sicherheitscommunity verbreitet sind.}, language = {de} } @inproceedings{WeichLobachev2025, author = {Weich, Patrick and Lobachev, Oleg}, title = {PIN-a-Boo: Revealing Smartphone PINs via Segmentation and Hand Skeleton Tracking from Video Feeds}, series = {WSCG 2025 Proceedings : Computer Science Research Notes - CSRN}, booktitle = {WSCG 2025 Proceedings : Computer Science Research Notes - CSRN}, publisher = {WSCG}, address = {Plzen}, issn = {464-4617}, doi = {10.24132/CSRN.2025-31}, pages = {293 -- 304}, year = {2025}, abstract = {It is crucial to improve smartphone security, given the prevalence of sensitive information stored on them. This study presents an attack strategy that reveals smartphone PIN entries using computer vision and pattern recognition techniques. By leveraging modern segmentation and hand skeleton tracking, our method accurately identifies and analyzes finger movement patterns, even when partially obscured. We can reliably infer the entered PIN by combining these movement patterns with the smartphone's position and the on-screen keypad layout. This approach significantly enhances shoulder-surfing attacks, requiring only a video recording of the entry process. Our attack requires much less specialized expertise, making it more accessible. We conclude by analyzing the method's potential impact and its implications for public safety.}, language = {en} } @inproceedings{LindauerDamusWinkeletal.2025, author = {Lindauer, Friederike and Damus, Martha and Winkel, Carmen and Frosch, Katharina}, title = {AI-Driven Communication Training for Cybersecurity with the Talk to Transform Simulator}, series = {KI-Forum 2025 : KI in Forschung und Lehre an Hochschulen}, booktitle = {KI-Forum 2025 : KI in Forschung und Lehre an Hochschulen}, publisher = {HsH Applied Academics}, doi = {10.25968/opus-3790}, pages = {8}, year = {2025}, abstract = {Effective communication skills are increasingly recognized as critical for leadership in digital transformation contexts. Recently, AI-Chatbots such as Talk to Transform (T2T) have been developed to enhance leadership competencies through interactive role-plays and feedback. This paper proposes their adaptation for cybersecurity training. We discuss the current landscape of cybersecurity training, highlight the importance of communication, and present T2T as an innovative approach to bridge this gap through chatbot-driven role-plays.}, language = {en} } @article{SataStannariusPuzyrev2025, author = {Sata, Sai Preetham and Stannarius, Ralf and Puzyrev, Dmitry}, title = {Criteria for dynamical clustering in permanently excited granular gases: comparison and estimation with machine learning approaches}, series = {Granular Matter}, volume = {27}, journal = {Granular Matter}, number = {4}, publisher = {Springer}, doi = {10.1007/s10035-025-01560-5}, year = {2025}, abstract = {When granular gases in microgravity are continuously excited mechanically, spatial inhomogeneities of the particle distribution can emerge. At a sufficiently large overall packing fraction, a significant share of particles tend to concentrate in strongly overpopulated regions, so-called clusters, far from the excitation sources. This dynamical clustering is caused by a complex balance between energy influx and dissipation. The mean number density of particles, the geometry of the container, and the excitation strength influence cluster formation. A quantification of clustering thresholds is not trivial. We generate 'synthetic' data sets by Discrete Element Method simulations of frictional spheres in a cuboid container and apply established criteria to classify the local packing fraction profiles. Machine learning approaches that predict dynamic clustering from known system parameters on the basis of classical test criteria areoposed and tested. It avoids the necessity of complex numerical simulations.}, language = {en} } @inproceedings{FitzTeutenbergVeldyaevaetal.2026, author = {Fitz, Lukas R. G. and Teutenberg, Lukas and Veldyaeva, Ekaterina and Scheeg, Jochen}, title = {Augmented Reality Solution Requirements for Human-Building Interactions: Lessons Learned from an Applied Science Project}, series = {Konferenz: 27th International Conference on Human-Computer Interaction, HCII 2025, Gothenburg, Sweden, June 22-27, 2025, Proceedings, Part III, HCI International 2025 - Late Breaking Papers}, booktitle = {Konferenz: 27th International Conference on Human-Computer Interaction, HCII 2025, Gothenburg, Sweden, June 22-27, 2025, Proceedings, Part III, HCI International 2025 - Late Breaking Papers}, edition = {1}, publisher = {Springer}, isbn = {978-3-032-12775-4}, doi = {10.1007/978-3-032-12773-0_21}, pages = {217 -- 225}, year = {2026}, abstract = {One popular application domain for Augmented Reality (AR) technology is facilitating human-building interactions (HBI). Such applications help users to retrieve and transact information through localized interaction points displayed on their (mobile) devices. Growing adoption of AR technology underlines the importance of incorporating suitable AR components for HBI, which is important for effective implementation and testing of HBI-AR use cases, increasing user satisfaction, and long-term viability. In this context, our short paper presents key experiences and lessons learned from an applied science project targeting the development and evaluation of an HBI-AR university campus app. Drawing on an ex-post inquiry of project collaborator experiences, we prescriptively highlight relevant AR solution requirements for this specific design context. Our findings amplify the importance of (1) balancing trade-offs between different spatial embedding computation methods, (2) modularity, customizability, and testability for efficient software development, and (3) taking building complexity and prototype maturity requirements into account when taking AR solution make-or-buy decisions. Our shared insights may inform future best practices and design principles for convergent HBI and AR projects in research and practice.}, language = {en} } @article{HarthTrittelMohammadietal.2025, author = {Harth, Kirsten and Trittel, Torsten and Mohammadi, Mahdieh and Puzyrev, Dmitry and Enezz, Mohammad and Cruz Hidalgo, Raul and Stannarius, Ralf}, title = {Granular gases of rough spheres: Velocity, rotation and collision statistics from in-situ measurements, optical data and simulations}, series = {EPJ Web of Conferences}, volume = {340}, journal = {EPJ Web of Conferences}, editor = {Alam, M. and Das, S.L. and Bose, M. and Murthy, T.G. and Chikkadi, V. and Singh, A. and Luding, S.}, publisher = {EDP Sciences}, doi = {10.1051/epjconf/202534003012}, year = {2025}, abstract = {Granular gases are not only of interest in fundamental physics, but they can also serve as a test ensembles for the validity of collision models employed in (loose) granular matter. The theoretical literature mainly addresses spheres under ideal conditions and simulations allow full access to all particle parameters, but experiments cannot fulfill these idealizations. We investigate granular gases of soft, rough spheres by combining microgravity experiments and adjusted simulations. We introduce Smart Particles with embedded autarkic micro-sensors for in-situ measurements of rotation rates and accelerations. Additionally, we extract 3D positions, translations and orientations of the particles from stereoscopic video data using Machine-Learning based algorithms. We address the partition of kinetic energy between the degrees of freedom, the angular and translational velocity as well as collision statistics. A simulation is adjusted to experiment parameters, showing good agreement of translational motion, but qualitative differences in the decay of rotational kinetic energy.}, language = {en} } @article{StannariusWangPongoetal.2025, author = {Stannarius, Ralf and Wang, Jing and Pong{\´o}, Tivadar and Fan, Bo and B{\"o}rzs{\"o}nyi, Tam{\´a}s and Hidalgo, Ra{\´u}l Cruz}, title = {Forces on a sphere suspended in flowing granulate}, series = {EPJ Web of Conferences}, volume = {340}, journal = {EPJ Web of Conferences}, editor = {Alam, M. and Das, S.L. and Bose, M. and Murthy, T.G. and Chikkadi, V. and Singh, A. and Luding, S.}, publisher = {EDP Sciences}, doi = {10.1051/epjconf/202534002019}, year = {2025}, abstract = {We investigate the forces of flowing granular material on an obstacle. A sphere suspended in a discharging silo experiences both weight of the overlaying layers and drag of the surrounding moving grains. In experiments with frictional hard glass beads, the force on the obstacle was found to be practically flow-rate independent. In contrast, flow of nearly frictionless soft hydrogel spheres added drag forces which increased with the flow rate until reaching saturation at high flow speeds. The total force grew quadratically with the obstacle diameter in the soft, low friction material, while it grew much weaker, nearly linearly with the obstacle diameter, in the bed of hard, frictional glass spheres. In addition to the drag, obstacles embedded in the flowing hydrogel spheres experience a weight force from the top as if immersed in a hydrostatic pressure profile, but negligible counter-forces from below. In contrast, the frictional hard particles create a strong pressure gradient near the upper surface of the obstacle. Numerical simulations provide additional information that is difficult to access experimentally. They reproduce the experimental results and give hints for the origin of the different force contributions. The results have considerable practical importance for the discharge of storage containers with large objects suspended in flowing granular material.}, language = {en} } @article{PreethamSataStannariusPuzyrev2025, author = {Preetham Sata, Sai and Stannarius, Ralf and Puzyrev, Dmitry}, title = {Machine learning for prediction of dynamical clustering in granular gases}, series = {EPJ Web of Conferences}, volume = {340}, journal = {EPJ Web of Conferences}, editor = {Alam, M. and Das, S.L. and Bose, M. and Murthy, T.G. and Chikkadi, V. and Singh, A. and Luding, S.}, publisher = {EDP Sciences}, doi = {10.1051/epjconf/202534012012}, year = {2025}, abstract = {Continuously excited dense granular gases in microgravity can develop spatial inhomogeneities of the particle distribution. Dynamical clustering is a phenomenon where a significant share of particles concentrate in strongly overpopulated regions. It is caused by a complex interplay between the energy influx and dissipation in collisions. The overall packing fraction, container geometry, and excitation parameters influence the gas-cluster transition. We perform Discrete Element Method (DEM) simulations for frictional spheres in a cuboid container and apply statistical criteria to the packing fraction profiles. Machine learning (ML) methods are used to study the dependence of the gas-cluster transition on system parameters. It is a promising alternative to predict the state of the system without the need for the time-consuming DEM simulations. We identify the best models for predicting the dynamical clustering of frictional spheres in a specific experimental geometry.}, language = {en} } @article{Vollmer2025, author = {Vollmer, Michael}, title = {Naked eye celestial objects and phenomena: how far can we see at night?}, series = {European Journal of Physics}, volume = {46}, journal = {European Journal of Physics}, number = {3}, publisher = {IOP Science}, doi = {10.1088/1361-6404/adbf74}, pages = {18}, year = {2025}, abstract = {How far can we see with the naked eye at night? Many celestial objects like stars and galaxies as well as transient phenomena such as comets and supernovae can be observed in the night sky. We discuss the furthest distances of such objects and phenomena observable with the naked eye during the night-time for Earth-bound observers. The physics of night-time visual ranges differs from that of daytime observations because human vision shifts from cones to rods. In addition, mostly point sources are observed due to the large distances involved. Whether celestial objects and phenomena can be detected depends on the contrast of their radiation and the background sky luminance. We present a concise overview of how far we can see at night by first discussing the effects of the Earth's atmosphere. This includes attenuation of transmitted radiation as well as its role as a source of background radiation. Disregarding the attenuation of light due to interstellar and intergalactic dust, simple maximum night-time visual range estimates are based on the inverse square law, which can be easily verified by laboratory and demonstration experiments. From the respective calculations, we find that individual stars within the Milky Way galaxy of up to 15 000 light years are observable. Even further away are observable galaxies with several billion stars. The Andromeda galaxy can be observed with the naked eye at a distance of around 2.5 million light years. Similarly, the observability of supernovae also allows a visual range beyond the Milky Way galaxy. Finally, gamma ray bursts as the most energetic events in the universe are discussed concerning naked eye observations.}, language = {en} } @article{Vollmer2025, author = {Vollmer, Michael}, title = {How far can we see at day?}, series = {European Journal of Physics}, volume = {46}, journal = {European Journal of Physics}, number = {3}, publisher = {IOP Science}, doi = {10.1088/1361-6404/adc4a0}, pages = {17}, year = {2025}, abstract = {We discuss the farthest objects on Earth observable for the unaided, healthy naked eye during the daytime, i.e., the maximum visual range for observers on Earth. Visual range depends first on the properties of the material between observer and object and its interaction processes with radiation, but second also on our visual perception system. After a rough comparison of ranges in water, glass, and the atmosphere, we focus on the physical basis of visual range for the latter. As a contrast phenomenon, visual range refers to allowed light paths within the atmosphere. It results from the interplay of geometry, refraction, and light scattering. We present a concise overview of this field by qualitative descriptions and quantitative estimates as well as classroom demonstration experiments. The starting point is the common geometrical visual ranges, followed by extensions due to refraction and limitations due to contrast, which depend on scattering and absorption processes within the atmosphere. The quantitative discussion of scattering is very helpful to easily understand the huge ranges in nature from meters in dense fog to hundreds of kilometers in clear atmospheres. Extreme visual ranges from about 300 km to above 500 km require optimal atmospheric conditions, cleverly chosen locations and times, and a sophisticated topography analysis. Even longer visual ranges are possible when looking through the vertical atmosphere. From the ISS, daytime ranges well above 1000 km are possible.}, language = {en} } @article{Vollmer2026, author = {Vollmer, Michael}, title = {How many stars appear colored to the naked eye?}, series = {Applied Optics}, volume = {65}, journal = {Applied Optics}, number = {9}, publisher = {Optica Publishing Group}, doi = {10.1364/AO.580635}, pages = {C27 -- C37}, year = {2026}, abstract = {Naked eye studies of the clear night sky reveal that a certain percentage of all observable stars can be perceived as having color. Subjective estimates differ widely, ranging from just a few to a maximum of above two hundred. Explanations are based on the emission spectra of the stars, which are modified by interstellar dust clouds, the Earth atmosphere, and mostly the inverse square law. Color changes occur not only for variation of the star's angular elevation above the horizon, but as well for decreasing nighttime sky brightness due to the transition from photopic via mesopic to scotopic vision. The maximum number of stars showing color to the naked eye depends on star illuminances on Earth and the background sky luminance. The limit of observing color is found to correspond to apparent visual magnitudes around , defining the number of colored stars. This also means that naked eye perception of stars with color is only possible for a certain star distance range, which is well below the maximum naked eye visual range of stars.}, language = {en} } @techreport{KitzelmannBoerschTarassowetal.2025, author = {Kitzelmann, Emanuel and Boersch, Ingo and Tarassow, Artur and Nitze, Andr{\´e} and Gohlicke, Franziska and Hochwald, Jessica and Siebert, Tim and Wagner, Robin}, title = {SmartRetrieve - GraphRAG f{\"u}r einen Campus-ChatBot, Abschlussbericht}, organization = {Technische Hochschule Brandenburg}, doi = {10.25933/opus4-3341}, pages = {49}, year = {2025}, language = {de} } @inproceedings{DaupayevReberBendyketal.2025, author = {Daupayev, Nursultan and Reber, Paul and Bendyk, Ricky and Engel, Christian and Hirsch, S{\"o}ren}, title = {Data Reduction for Energy-Constrained Sensors via Event-Aware Sampling}, series = {Konferenz: 2025 IEEE SENSORS, Vancouver, BC, Canada, 2025}, booktitle = {Konferenz: 2025 IEEE SENSORS, Vancouver, BC, Canada, 2025}, publisher = {IEEE}, isbn = {979-8-3315-4467-6}, issn = {2168-9229}, doi = {10.1109/SENSORS59705.2025.11330656}, pages = {1 -- 4}, year = {2025}, abstract = {Environmental monitoring plays a crucial role in analyzing environmental parameters and detecting anomalies. However, sensor systems work continuously, which results in constant energy consumption and data redundancy, especially for sensors with limited computing power and memory. In addition, installing and maintaining sensors in remote places creates additional challenges. An adaptive environmental sensing approach is developed to reduce data redundancy and energy consumption. A custom-designed sensor based on PIC16LF19156 microcontroller measures CO2, humidity and temperature simultaneously. The sensor is connected to a Raspberry Pi, where a signal processing algorithm is executed, aimed at reducing data redundancy, thereby increasing the energy efficiency of the system. The algorithm includes the discrete wavelet transform (DWT) to extract spectral features from the signals. A machine learning model trained on previous data estimates the daily variability of the signal and saves data labeled as SAVE (deviations) or SKIP (consistency). As a result, only the relevant intervals showing significant fluctuations are retained. The effectiveness of the proposed approach was evaluated by reconstructing the compressed signals and comparing them with the original data based on RMSE and MAE metrics, which confirms the insignificant loss of information.}, language = {en} } @incollection{Vollmer2025, author = {Vollmer, Michael}, title = {Elektromagnetische Wellen - Grundlagen und ausgew{\"a}hlte Anwendungen}, series = {Schwingungen und Wellen in Alltagskontexten}, booktitle = {Schwingungen und Wellen in Alltagskontexten}, edition = {1}, publisher = {Springer}, doi = {10.1007/978-3-662-70949-8_3}, pages = {35 -- 48}, year = {2025}, abstract = {Schwingungen und Wellen zeigen sich in vielen Alltagsph{\"a}nomenen der Physik, d. h. in der Lebenswelt von Sch{\"u}lerinnen und Sch{\"u}lern. Dazu z{\"a}hlen in der Mechanik Beispiele wie Schaukeln, Seilwellen oder Wasserwellen am Strand, in der Akustik Schallwellen durch beliebige Ger{\"a}usche oder stehende Wellen in Musikinstrumenten und im Elektromagnetismus die allgegenw{\"a}rtigen elektromagnetischen Wellen. Letztere haben vielf{\"a}ltigste Anwendungen, z. B. Erhitzen mit Mikrowellenger{\"a}ten, Kommunizieren mit Smartphones, Daten{\"u}bertragung mit Lichtleitern oder Fotografieren mit Kameras, ganz zu schweigen von medizinischen Anwendungen der Endoskopie, des R{\"o}ntgens oder laserbasierten chirurgischen Eingriffen. Viele dieser Anwendungen haben ein enormes Motivationspotenzial in der Lehre, weshalb das Thema fest in Lehrpl{\"a}nen der Sekundarstufen verankert ist. Im Folgenden werden zun{\"a}chst allgemeine Grundlagen und Gemeinsamkeiten der Beschreibung beliebiger Wellen diskutiert, bevor das Hauptaugenmerk auf elektromagnetische Wellen und ausgew{\"a}hlte Anwendungen gelegt wird.}, language = {de} } @article{Vollmer2024, author = {Vollmer, Michael}, title = {Optical Phenomena in the Atmosphere}, series = {Encyclopedia of Atmospheric Sciences}, journal = {Encyclopedia of Atmospheric Sciences}, number = {2}, edition = {3}, publisher = {academic press}, doi = {10.1016/B978-0-323-96026-7.00177-6}, pages = {285 -- 306}, year = {2024}, abstract = {Following a brief description of the atmosphere and spectra of the Sun as dominant daytime light source, the most common optical phenomena within the troposphere are discussed, which are due to scattering of radiation with the constituents of the atmosphere. At first mirages, rainbows, coronas, iridescence, glories and halos are explained. Then light scattering phenomena which give rise to sunset colors, blue and colorful skies are presented as well as related phenomena like blue mountains, white clouds, green flashes and visual ranges. The review ends with a short survey of other less easily observable optical phenomena of the atmosphere and a very detailed bibliography.}, language = {en} } @book{Vollmer2024, author = {Vollmer, Michael}, title = {Optik und ihre Ph{\"a}nomene}, edition = {3}, publisher = {Springer}, isbn = {978-3-662-69308-7}, doi = {10.1007/978-3-662-69309-4}, publisher = {Technische Hochschule Brandenburg}, pages = {XXIII, 607}, year = {2024}, abstract = {Dieses Lehr-, Lern-, Fach- und Sachbuch pr{\"a}sentiert die Grundlagen der Optik in Theorie und ausf{\"u}hrlich beschriebenem Experiment sowie vielf{\"a}ltige faszinierende optische Ph{\"a}nomene. Ob in Vorlesungen, Seminaren, f{\"u}r Projektarbeiten, Schulunterricht oder Selbststudium - dieses Buch ist eine wertvolle Ressource f{\"u}r alle, die sich f{\"u}r Optik interessieren. Durch die große Zahl zitierter Originalarbeiten schl{\"a}gt es nicht nur die Br{\"u}cke zur Lehre sondern auch zur Forschung.}, language = {de} } @article{RadingerBraunJechowetal.2026, author = {Radinger, Johannes and Braun, Marlon and Jechow, Andreas and H{\"o}lker, Franz and Michiels, Niko K. and Feldhege, Fritz and Roser, Phillip and Arlinghaus, Robert}, title = {Effectiveness of fluorescent angling lures on catch outcomes in European perch (Perca fluviatilis) under ambient light conditions}, series = {Canadian Journal of Fisheries and Aquatic Sciences}, volume = {83}, journal = {Canadian Journal of Fisheries and Aquatic Sciences}, publisher = {Canadian Science Publishing}, doi = {10.1139/cjfas-2025-0084}, pages = {1 -- 16}, year = {2026}, abstract = {Anecdotal reports in angling media suggest that using fluorescent lures may increase catch rates in dim light or at high turbidity. We conducted a controlled angling experiment, comprising 501 30-min experimental fishing trials in three meso- to eutrophic waterbodies and assessed catch rates and sizes of European perch (Perca fluviatilis) caught when offered two soft plastic lures (fluorescent vs. non-fluorescent) with similar reflective spectra. We also examined fluorescent properties of a range of market-available lures and modelled the experimental lure's fluorescing effects under natural lake light. Considering the specific light environment of the study waters, the experimental fluorescent lure could get excited by downwelling visible daylight and fluoresce at depths of up to 3 meters. Based on a sample catch of 331 perch, and after controlling for interactions with illuminance, cloud cover, water depth and daytime, the fluorescence of the experimental lure did, however, neither affect the catch rate nor the size of perch caught. Lure fluorescence maybe less important than many anglers believe, but further studies in different lake conditions are needed.}, language = {en} } @book{Kraska, author = {Kraska, Martin}, title = {Technische Mechanik mit SMath Studio}, publisher = {Springer}, address = {Wiesbaden}, isbn = {978-3-658-50591-2}, doi = {10.1007/978-3-658-50592-9}, pages = {XI, 210}, abstract = {Dieses Lehrbuch f{\"u}hrt am Beispiel der Technischen Mechanik in die Nutzung der Mathematiksoftware SMath Studio f{\"u}r die Durchf{\"u}hrung und Dokumentation technischer Berechnungen ein. Das f{\"u}r Privatanwender kostenlose SMath ist, {\"a}hnlich wie Mathcad, eine leistungsf{\"a}hige Alternative zu Papier, Bleistift und Taschenrechner oder auch zu den bekannten Tabellenkalkulationsprogrammen. Das Buch nimmt Einsteiger an die Hand, behandelt aber auch Erweiterungen wie numerische Methoden und Computeralgebra. Mit Beispielen aus Statik, Festigkeitslehre und Dynamik wird das typische Themenspektrum der Technischen Mechanik in technischen Studieng{\"a}ngen, insbesondere im Maschinenbau, abgedeckt.}, language = {de} } @article{DickersonAndreasNoessleretal.2026, author = {Dickerson, Ashton L. and Andreas, Jechow and N{\"o}ßler, Michelle and Walles, Tim J. and Berger, Stella A. and H{\"o}lker, Franz and Nejstgaard, Jens C.}, title = {High-resolution in situ imaging reveals size-specific moonlight responses in zooplankton diel vertical migration}, series = {Scientific Reports}, volume = {16}, journal = {Scientific Reports}, number = {1}, publisher = {Nature}, doi = {10.1038/s41598-026-36105-0}, pages = {1 -- 14}, year = {2026}, abstract = {Light is the primary cue driving zooplankton diel vertical migration (DVM), a strategy that balances predation risk with resource access. However, DVM is often oversimplified, with limited consideration of how light-driven risks and resource needs vary across taxa and life stages. This simplification is partly due to constraints on collecting high-resolution, size-resolved data —especially at night, when subtle shifts in illumination reshape nocturnal risk landscapes. To overcome these limitations, we deployed a high-resolution in situ modular Deep-focus Plankton Imager and an image-recognition approach to quantify fine scale DVM and body sizes of Cladocerans and Copepods in Lake Stechlin, Germany. Data was collected from day into night and across moonrise and was compared with environmental data from vertical profiling sondes. Typical DVM patterns emerged, with deeper daytime distributions, however, moonlight introduced additional behavioural complexity: larger individuals avoided illuminated layers, likely managing predation risk, while smaller individuals moved into these layers, possibly exploiting foraging opportunities and reduced risk. These light-mediated shifts were further shaped by ecological conditions; copepods tracked food-rich layers regardless of light levels at night, while cladocerans showed light-dependent responses to both temperature and food, such that light caused them to avoid otherwise favourable (warm, food-rich) layers. Our approach provides new insight into how zooplankton navigate nocturnal lightscapes, revealing size- and taxon-specific strategies. By establishing size-dependent responses to natural moonlight, this work provides a crucial baseline for predicting how artificial light at night may restructure zooplankton communities and destabilize freshwater food webs.}, language = {en} } @unpublished{MarkgrafMuellerHenkeletal.2026, author = {Markgraf, Klaus and M{\"u}ller, Katja and Henkel, Clara and Flassig, Robert and Janke, Christian and Flassig, Peter}, title = {Application of Explainable Artificial Intelligence (XAI) in Combination with Bootstrap to Improve Processes in Model-Based Aero-Engine Development}, doi = {10.21203/rs.3.rs-8590595/v1}, pages = {1 -- 23}, year = {2026}, abstract = {In aerospace engineering, data-driven surrogate models are increasingly employed to mitigate the computational and temporal costs of simulations, numerical analyses, and experiments. Two major challenges accompany this trend. First, the training of surrogate models often requires a sufficient amount of data, the determination of which is inherently difficult. Second, these models often exhibit high complexity, limiting both the traceability of their outputs and the extraction of useful insights. Explainable Artificial Intelligence (XAI) methods have therefore emerged as promising tools to enhance the interpretability, explainability, and transparency of such models. In this work, a combination of the established Shapley Additive Explanations (SHAP) approach with a bootstrap-based method is investigated. The proposed framework provides insights into the contribution of individual features and enables an assessment of data sufficiency with respect to surrogate model performance. Building upon these findings, the Bootstrap-Informed Feature Importance (BIFI) method is proposed. BIFI offers a model-agnostic, robust identification of relevant features.The method is analyzed in the context of Design of Experiments (DOE) processes used for surrogate model construction. Evaluation on four synthetic datasets of increasing complexity, as well as a dataset from aero-engine development, demonstrates that BIFI-based DOEs can improve surrogate model quality measured in terms of R and MSE by up to 90\%. Consequently, the proposed method enables more efficient utilization of simulations, computations, and experiments while reducing the required number of samples.}, language = {en} } @inproceedings{QuernerEwerlingKindsmueller2025, author = {Querner, Erich and Ewerling, Philipp and Kindsm{\"u}ller, Martin Christof}, title = {Touch gets it done, tangibles make it fun? Balancing objective accuracy and user experience}, series = {Mensch und Computer 2025 - Workshopband : MCI-WS11: 18th Workshop "Be-greifbare Interaktion". Chemnitz. 31. August - 03. September 2025}, booktitle = {Mensch und Computer 2025 - Workshopband : MCI-WS11: 18th Workshop "Be-greifbare Interaktion". Chemnitz. 31. August - 03. September 2025}, publisher = {Gesellschaft f{\"u}r Informatik}, doi = {https://doi.org/10.18420/muc2025-mci-ws11-164}, pages = {1 -- 6}, year = {2025}, abstract = {This study compares Tangible User Interfaces (TUIs) with conventional touch interfaces (CTIs) on multi-touch tables for exploratory multi-user map applications. We developed a prototype that enables multiple users to interact with map content simultaneously and independently. Four interaction methods were implemented and evaluated: gesture-based touch control, widget-based touch joystick control, and two tangible interaction variants (a joystick and car-steering metaphor). A user study with 15 participants was conducted in which users navigated predefined routes with varying difficulty. We collected both objective performance measurements and subjective user assessments. While touch-based methods yielded higher accuracy in objective metrics, TUI-based interactions were rated significantly better by participants in terms of user experience. Notably, the car-steering tangible control was particularly well-received, highlighting how physical, playful interaction can enhance usability despite lower accuracy. These findings contribute to our understanding of how different interaction paradigms support collaborative exploration on multi-touch surfaces.}, language = {en} } @inproceedings{SimmeringPfeifferKindsmueller2025, author = {Simmering, Veronika and Pfeiffer, Thies and Kindsm{\"u}ller, Martin Christof}, title = {The Impact of Embodiment and Output Modality on Learning with Conversational Agents in VR}, series = {GI Workshop 2025 on Virtual and Augmented Reality : VR/AR 2025, Lecture Notes in Informatics (LNI), Gesellschaft f{\"u}r Informatik, Bonn 2025}, booktitle = {GI Workshop 2025 on Virtual and Augmented Reality : VR/AR 2025, Lecture Notes in Informatics (LNI), Gesellschaft f{\"u}r Informatik, Bonn 2025}, publisher = {Gesellschaft f{\"u}r Informatik}, issn = {2944-7682}, doi = {10.18420/vrar2025_12}, pages = {235 -- 254}, year = {2025}, abstract = {In Virtual Reality (VR) learning applications, the integration of pedagogical agents is particularly promising, as they function as a virtual social support. With the recent developments in Large Language Models (LLMs), conversational language models are now available that enable natural language interaction in a VR environment. We evaluated four possible designs for LLM-based agents (푛 = 21) in an aircraft-engine training. Focusing on the primary questions when bringing LLM-based agents into VR: whether to use text or speech and whether to embody the conversational agent in 3D or not. Pre- and post-tests were used to measure retention and questionnaires were used to measure the User Experience (UX) of different design variants. Contrary to our hypotheses, retention was higher when using a non-embodied design compared to an embodied design. The output modality did not have a significant impact on the learning success, but it did have an impact on the UX.}, language = {en} } @incollection{KristalNaguleswaran2026, author = {Kristal, Samuel and Naguleswaran, Piruntha}, title = {Der Einfluss von Rebranding auf den Markenwert im Kontext von k{\"u}nstlicher Intelligenz: Eine bibliometrisch-systematische Analyse}, series = {Handbuch Innovatives Marketing}, booktitle = {Handbuch Innovatives Marketing}, publisher = {Springer}, address = {Wiesbaden}, doi = {10.1007/978-3-658-46709-8_99-1}, publisher = {Technische Hochschule Brandenburg}, pages = {1 -- 19}, year = {2026}, abstract = {In Zeiten rasanter technologischer Entwicklungen stellt sich die Frage, welchen Einfluss Rebranding auf den Markenwert hat, insbesondere im Kontext k{\"u}nstlicher Intelligenz. W{\"a}hrend Rebranding traditionell als strategische Maßnahme zur Anpassung an ver{\"a}nderte Marktbedingungen verstanden wurde, er{\"o}ffnet die Integration von KI neue M{\"o}glichkeiten der Automatisierung, Personalisierung und datengetriebenen Entscheidungsfindung. Der vorliegende Beitrag beleuchtet die Rolle von KI im Rebranding-Prozess und untersucht, inwiefern KI-gest{\"u}tzte und menschliche Strategien den Markenwert beeinflussen. Durch eine bibliometrische und systematische Literaturanalyse wird der aktuelle Forschungsstand aufgearbeitet, zentrale Mechanismen identifiziert und zuk{\"u}nftiger Forschungsbedarf abgeleitet. Abschließend werden Implikationen f{\"u}r Wissenschaft und Praxis diskutiert, um eine fundierte Grundlage f{\"u}r den strategischen Einsatz von KI im Markenmanagement zu schaffen.}, language = {de} } @inproceedings{QuernerEwerlingKindsmueller2025, author = {Querner, Erich and Ewerling, Philipp and Kindsm{\"u}ller, Martin Christof}, title = {Setting the Stage for Collaboration: A Multi-View Table for Touch and Tangible Map Interaction}, series = {Mensch und Computer 2025 - Workshopband : MCI-WS11: 18th Workshop "Be-greifbare Interaktion". Chemnitz. 31. August - 03. September 2025}, booktitle = {Mensch und Computer 2025 - Workshopband : MCI-WS11: 18th Workshop "Be-greifbare Interaktion". Chemnitz. 31. August - 03. September 2025}, publisher = {Gesellschaft f{\"u}r Informatik}, doi = {10.18420/muc2025-mci-demo-318}, pages = {1 -- 4}, year = {2025}, abstract = {We present a multi-user map application based on a novel multiview concept that enables simultaneous and independent interaction with shared geospatial content. Each user operates a personal View Finder and Focus View, color-coded for clarity, while a shared, immutable Context View provides a common reference frame. The system supports both touch-based and tangible interaction techniques, including gesture control, virtual joysticks, and physical objects. Users can flexibly arrange their workspaces on a multi-touch table, supporting both individual exploration and collaborative tasks.}, language = {de} } @article{PuzyrevTrittelHarthetal.2025, author = {Puzyrev, Dmitry and Trittel, Torsten and Harth, Kirsten and Sata, Sai Preetham and Stannarius, Ralf and Cruz Hidalgo, Ra{\´u}l}, title = {AI-aided visual data analysis for granular gases: Complex particles, high density, and other challenges}, series = {EPJ Web of Conferences}, volume = {340}, journal = {EPJ Web of Conferences}, editor = {Alam, M. and Das, S.L. and Bose, M. and Murthy, T.G. and Chikkadi, V. and Singh, A. and Luding, S.}, publisher = {EDP Sciences}, doi = {10.1051/epjconf/202534012013}, year = {2025}, abstract = {Microgravity experiments with three-dimensional (3D) granular gases, i.e., ensembles of freemoving macroscopic particles which collide inelastically, produce large amounts of stereo video footage which require processing and analysis. The main steps of data treatment are particle detection, 3D matching and tracking in stereoscopic views, and quantification of ensemble statistical properties such as, e.g. mean kinetic energy or collision processes. Frequent overlapping or clustering of particles and their complicated movement patterns require smart software solutions. In recent years, Artificial Intelligence/Machine Learning (AI/ML) methods were successfully used for analysis of granular systems. We have applied such techniques to the granular gases of rod-like particles and developed a software tool which enables a full cycle of semi-automatic experimental data analysis. The approach is now tested on more complex, non-convex particles, shaped as 3D crosses (hexapods). Another challenge is optical analysis of dense granular gases, where individual particles cannot be tracked. We present a preliminary result of application of an ML method for number density profiles extraction in VIP-Gran experiment with dense ensemble of rod-like particles.}, language = {en} } @article{WehlandCorydonGonzalezTorresetal.2025, author = {Wehland, Markus and Corydon, Thomas J. and Gonz{\´a}lez-Torres, Luis Fernando and Abdelfattah, Fatima and Sahana, Jayashree and Schulz, Herbert and Mushunuri, Ashwini and Burenkova, Hanna and Wuest, Simon L. and Kr{\"u}ger, Marcus and Kraus, Armin and Grimm, Daniela}, title = {New Knowledge About Tissue Engineering Under Microgravity Conditions in Space and on Earth}, series = {International Journal of Molecular Sciences}, volume = {27}, journal = {International Journal of Molecular Sciences}, number = {1}, publisher = {MDPI}, doi = {10.3390/ijms27010341}, year = {2025}, abstract = {Microgravity (µg)-generated three-dimensional (3D) multicellular aggregates can serve as models of tissue and disease development. They are relevant in the fields of cancer and in vitro metastasis or regenerative medicine (tissue engineering). Driven by the 3R concept—replacement, reduction, and refinement of animal testing—µg-exposure of human cells represents a new alternative method that avoids animal experiments entirely. New Approach Methodologies (NAMs) are used in biomedical research, pharmacology, toxicology, cancer research, radiotherapy, and translational regenerative medicine. Various types of human cells grow as 3D spheroids or organoids when exposed to µg-conditions provided by µg simulating instruments on Earth. Examples for such µg-simulators are the Rotating Wall Vessel, the Random Positioning Machine, and the 2D or 3D clinostat. This review summarizes the most recent literature focusing on µg-engineered tissues. We are discussing all reports examining different tumor cell types from breast, lung, thyroid, prostate, and gastrointestinal cancers. Moreover, we are focusing on µg-generated spheroids and organoids derived from healthy cells like chondrocytes, stem cells, bone cells, endothelial cells, and cardiovascular cells. The obtained data from NAMs and µg-experiments clearly imply that they can support translational medicine on Earth.}, language = {en} } @article{SteinPilgermannWeberetal.2025, author = {Stein, Stefan and Pilgermann, Michael and Weber, Simon and Sedlmayr, Martin}, title = {Leveraging MDS2 and SBOM data for LLM-assisted vulnerability analysis of medical devices}, series = {Computational and Structural Biotechnology Journal}, volume = {28}, journal = {Computational and Structural Biotechnology Journal}, publisher = {Elsevier}, doi = {10.1016/j.csbj.2025.07.012}, pages = {267 -- 280}, year = {2025}, abstract = {This study investigated the use of a semi-automated, Retrieval-Augmented Generation (RAG)-based multi-agent architecture to analyze security-relevant data and assemble specialized exploitation paths targeting medical devices. The input dataset comprised device-specific sources, namely, the Manufacturer Disclosure Statement for Medical Device Security (MDS2) documents and Software Bills of Materials (SBOMs), enriched with public vulnerability databases, including Common Vulnerabilities and Exposures (CVE), Known Exploited Vulnerabilities (KEV), and Metasploit exploit records. The objective was to assess whether a modular, Large Language Model (LLM)-driven agent system could autonomously correlate device metadata with known vulnerabilities and existing exploit information to support structured threat modeling. The architecture follows a static RAG design based on predefined prompts and fixed retrieval logic, without autonomous agent planning or dynamic query adaptation. The developed Vulnerability Intelligence for Threat Analysis in Medical Security (VITAMedSec) system operates under human-prompted supervision and successfully synthesizes actionable insights and exploitation paths without requiring manual step-by-step input during execution. Although technically coherent results were obtained under controlled conditions, real-world validation remains a critical avenue for future research. This study further discusses the dual-use implications of such an agent-based framework, its relevance to patient safety in medical device cybersecurity, and the broader applicability of the proposed architecture to other critical infrastructure sectors. These findings emphasize both the technical potential and ethical responsibility for applying semi-automated AI workflows in medical cybersecurity contexts.}, language = {en} } @article{JamilMihajloskaTrpcheskaPopovskaMitrovikjetal.2025, author = {Jamil, Mahnoor and Mihajloska Trpcheska, Hristina and Popovska-Mitrovikj, Aleksandra and Dimitrova, Vesna and Creutzburg, Reiner}, title = {Advancing Image Spam Detection: Evaluating Machine Learning Models Through Comparative Analysis}, series = {Applied Sciences}, volume = {15}, journal = {Applied Sciences}, number = {11}, publisher = {MDPI}, issn = {2076-3417}, doi = {10.3390/app15116158}, year = {2025}, abstract = {Image-based spam poses a significant challenge for traditional text-based filters, as malicious content is often embedded within images to bypass keyword detection techniques. This study investigates and compares the performance of six machine learning models—ResNet50, XGBoost, Logistic Regression, LightGBM, Support Vector Machine (SVM), and VGG16—using a curated dataset containing 678 legitimate (ham) and 520 spam images. The novelty of this research lies in its comprehensive side-by-side evaluation of diverse models on the same dataset, using standardized dataset preprocessing, balanced data splits, and validation techniques. Model performance was assessed using evaluation metrics such as accuracy, receiver operating characteristic (ROC) curve, precision, recall, and area under the curve (AUC). The results indicate that ResNet50 achieved the highest classification performance, followed closely by XGBoost and Logistic Regression. This work provides practical insights into the strengths and limitations of traditional, ensemble-based, and deep learning models for image-based spam detection. The findings can support the development of more effective and generalizable spam filtering solutions in multimedia-rich communication platforms.}, language = {en} } @article{FonvielleBistarelliTaoetal.2025, author = {Fonvielle, Jeremy and Bistarelli, Lukas Thuile and Tao, Yile and Woodhouse, Jason N. and Shatwell, Tom and Villalba, Luis A. and Berger, Stella A. and Kyba, Christopher C. M. and Nejstgaard, Jens C. and Jechow, Andreas and Kupprat, Franziska and Stephan, Susanne and Walles, Tim J. W. and Wollrab, Sabine and Hoelker, Franz and Dittmar, Thorsten and Gessner, Mark O. and Singer, Gabriel A. and Grossart, Hans-Peter}, title = {Skyglow increases cyanobacteria abundance and organic matter cycling in lakes}, series = {Water Research}, journal = {Water Research}, publisher = {Elsevier}, doi = {10.1016/j.watres.2025.123315}, pages = {1 -- 11}, year = {2025}, abstract = {Artificial light propagating towards the night sky can be scattered back to Earth and reach ecosystems tens of kilometres away from the original light source. This phenomenon is known as artificial skyglow. Its consequences on freshwaters are largely unknown. In a large-scale lake enclosure experiment, we found that skyglow at levels of 0.06 and 6 lux increased the abundance of anoxygenic aerobic phototrophs and cyanobacteria by 32 (+/- 22) times. An ecosystem metabolome analysis revealed that skyglow increased the production of algal-derived metabolites, which appeared to stimulate heterotrophic activities as well. Furthermore, we found evidence that skyglow decreased the number of bacteria-bacteria interactions. Effects of skyglow were more pronounced at night, suggesting that responses to skyglow can occur on short time scales. Overall, our results call for considering skyglow as a reality of increasing importance for microbial communities and carbon cycling in lake ecosystems.}, language = {en} } @article{DietenbergerJechowKalinkatetal.2024, author = {Dietenberger, Manuel and Jechow, Andreas and Kalinkat, Gregor and Schroer, Sibylle and Saathoff, Birte and H{\"o}lker, Franz}, title = {Reducing the fatal attraction of nocturnal insects using tailored and shielded road lights}, series = {communications biology}, volume = {7}, journal = {communications biology}, publisher = {Nature}, doi = {10.1038/s42003-024-06304-4}, pages = {1 -- 12}, year = {2024}, abstract = {The attraction of insects to artificial light is a global environmental problem with far-reaching implications for ecosystems. Since light pollution is rarely integrated into conservation approaches, effective mitigation strategies towards environmentally friendly lighting that drastically reduce insect attraction are urgently needed. Here, we tested novel luminaires in two experiments (i) at a controlled experimental field site and (ii) on streets within three municipalities. The luminaires are individually tailored to only emit light onto the target area and to reduce spill light. In addition, a customized shielding renders the light source nearly invisible beyond the lit area. We show that these novel luminaires significantly reduce the attraction effect on flying insects compared to different conventional luminaires with the same illuminance on the ground. This underlines the huge potential of spatially optimized lighting to help to bend the curve of global insect decline without compromising human safety aspects. A customized light distribution should therefore be part of sustainable future lighting concepts, most relevant in the vicinity of protected areas.}, language = {en} } @article{OrlowskiWagnerl'Orteyeetal.2017, author = {Orlowski, Katja and Wagner, Dennis and l'Orteye, Annett and Ringk, Heike and Kohl, Verena and Schrader, Thomas}, title = {Analysing the activation of the plantar flexor muscles during treadmill walking}, series = {Gait \& Posture}, volume = {57}, journal = {Gait \& Posture}, number = {Supplement 1}, publisher = {Elsevier}, issn = {0966-6362}, doi = {10.1016/j.gaitpost.2017.06.377}, pages = {213 -- 214}, year = {2017}, language = {en} } @article{SteinWeberPilgermannetal.2024, author = {Stein, Stefan and Weber, Simon and Pilgermann, Michael and Schrader, Thomas and Sedlmayr, Martin}, title = {A Novel Approach to Medical Device IT Security Landscape Analysis Leveraging Manufacturer Disclosure Statements}, series = {IEEE Access}, journal = {IEEE Access}, number = {12}, publisher = {IEEE}, issn = {2169-3536}, doi = {10.1109/ACCESS.2024.3487824}, pages = {160506 -- 160515}, year = {2024}, abstract = {The growing number of cyberattacks targeting the healthcare sector increasingly threatens network-enabled medical devices that are vital for life-sustaining patient care. Security researchers and healthcare IT managers are pursuing effective methods to assess the IT security landscape of medical devices. Their goal is to develop a comprehensive understanding of the devices' IT security status. Recent studies have successfully uncovered structural deficiencies in medical device security. However, the limitations of their data sources, particularly in evaluating features like logging capabilities and third-party libraries, restrict the scope of their findings. In this study, we present the first systematic analysis of Manufacturer Disclosure Statement for Medical Device Security (MDS2) documents to evaluate their use in creating holistic statements regarding the IT security posture of medical devices. We examined a total of 147 MDS2 documents encompassing devices from 105 different classes. Our findings indicate that MDS2 documents, especially those from the second version (2013) onwards, are suitable for this purpose. We also discuss the shortcomings of the latest MDS2 version in meeting current IT security requirements. Based on the gaps identified, we developed several recommendations to improve MDS2 documents and enhance their effectiveness across the global healthcare sector. In the future, these documents could be used not only for comprehensive landscape analyses but also for organization-specific reports, providing healthcare managers with direct insights into the IT security status within their institutions.}, language = {en} } @article{KantJohannsen2022, author = {Kant, Daniel and Johannsen, Andreas}, title = {Evaluation of AI-based use cases for enhancing the cyber security defense of small and medium-sized companies (SMEs)}, series = {IS and T International Symposium on Electronic Imaging Science and Technology}, volume = {34}, journal = {IS and T International Symposium on Electronic Imaging Science and Technology}, number = {3}, publisher = {Society for Imaging Science and Technology (IS\&T)}, issn = {2470-1173}, pages = {387-1 -- 387-8}, year = {2022}, abstract = {Companies are increasingly facing the challenges of a persistent cyber threat landscape. By means of AI, cyber attacks can be efficiently conducted more successful through offensive AI. As for cyber defense, AI can be also utilized against cyber threats (defensive AI). Due to limited resources, especially in small and medium-sized companies (SMEs), there is a need to deploy more effective defensive cyber security solutions. Precisely, the adaptation of AI-based resilient defenses must be driven forward. Therefore, the aim of this paper is to identify and evaluate AI-related use cases with a high impact potential on the cyber security level, while being applicable to SMEs at the same time. In order to reach the research goal, an extensive literature review of several online catalogs, surveys and online platforms was conducted. In conclusion, seven crucial AI-based security features were outlined that are providing a high impact potential to the security level for SMEs. Afterwards, the results are discussed and set into a broader context. Even though AI-based security solutions are providing a large range of advantages, certain challenges and barriers using AI-related security applications are addressed in the paper as well. A high need for usable state of the art AI based cyber security solution for SMEs was identified.}, language = {en} } @article{HanXiangGuterding2025, author = {Han-Xiang, Xu and Guterding, Daniel}, title = {Incommensurate spin fluctuations and competing pairing symmetries in La3⁢Ni2⁢O7}, series = {Physical Review B}, volume = {112}, journal = {Physical Review B}, number = {17}, publisher = {American Physical Society}, doi = {10.1103/f6nj-34th}, pages = {8}, year = {2025}, abstract = {The recent discovery of superconductivity in the bilayer Ruddlesden-Popper nickelate La3⁢Ni2⁢O7 under high pressure has generated much interest in the superconducting pairing mechanism of nickelates. Despite extensive work, the superconducting pairing symmetry in La3⁢Ni2⁢O7 remains unresolved, with conflicting results even for identical methods. We argue that different superconducting states in La3⁢Ni2⁢O7 are in close competition and highly sensitive to the choice of interaction parameters as well as pressure-induced changes in the electronic structure. Our study uses a multiorbital Hubbard model, incorporating all Ni 3⁢𝑑 and O 2⁢𝑝 states. We analyze the superconducting pairing mechanism of La3⁢Ni2⁢O7 within the random phase approximation and find a transition between 𝑑-wave and sign-changing 𝑠-wave pairing states as a function of pressure and interaction parameters, which is driven by spin fluctuations with different wave vectors. These spin fluctuations with incommensurate wave vectors cooperatively stabilize a superconducting order parameter with 𝑑𝑥2-𝑦2 symmetry for realistic model parameters. Simultaneously, their competition may be responsible for the absence of magnetic order in La3⁢Ni2⁢O7, demonstrating that magnetic frustration and superconducting pairing can arise from the same set of incommensurate spin fluctuations.}, language = {en} } @article{PrinzOrlowskiBecketal.2025, author = {Prinz, Alexander and Orlowski, Katja and Beck, Eberhard and Witte, Kerstin}, title = {Serious Games for Seniors With Dementia: A Pilot Study}, series = {Journal of Applied Gerontology}, volume = {2025}, journal = {Journal of Applied Gerontology}, publisher = {SAGE}, doi = {10.1177/07334648251350846}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:522-opus4-33440}, pages = {1 -- 11}, year = {2025}, abstract = {Dementia, marked by cognitive decline, significantly impacts daily life. With global prevalence rising, traditional treatments manage symptoms but have side effects and offer no cure. Non-pharmacological interventions, like serious games, are gaining importance. This study assesses the feasibility and benefits of serious games for people with mild to moderate dementia over a 10-week intervention. Sixty-one patients were recruited, with 35 completing the study. The intervention included six games focusing on physical and cognitive training. Outcome measures were motor function, cognitive assessments, quality of life, and depression. Results showed significant improvements in dynamic balance (p = .013) but no significant changes in other measures. The findings suggest that serious games are feasible and can improve motor functions like balance. However, short intervention periods may limit their impact on cognitive function and quality of life. Longer interventions and personalized game designs are recommended for greater benefits.}, language = {en} } @article{KantJohannsenCreutzburg2021, author = {Kant, Daniel and Johannsen, Andreas and Creutzburg, Reiner}, title = {Analysis of IoT Security Risks based on the exposure of the MQTT Protocol}, series = {IS and T International Symposium on Electronic Imaging Science and Technology}, volume = {33}, journal = {IS and T International Symposium on Electronic Imaging Science and Technology}, publisher = {Society for Imaging Science and Technology (IS\&T)}, doi = {10.2352/ISSN.2470-1173.2021.3.MOBMU-096}, pages = {096-1 -- 096-8}, year = {2021}, language = {en} } @article{KantCreutzburgJohannsen2020, author = {Kant, Daniel and Creutzburg, Reiner and Johannsen, Andreas}, title = {Investigation of risks for Critical Infrastructures due to the exposure of SCADA systems and industrial controls on the Internet based on the search engine Shodan}, series = {IS and T International Symposium on Electronic Imaging Science and Technology}, journal = {IS and T International Symposium on Electronic Imaging Science and Technology}, publisher = {Society for Imaging Science and Technology (IS\&T)}, address = {Springfield, VA}, issn = {2470-1173}, doi = {10.2352/ISSN.2470-1173.2020.3.MOBMU-253}, pages = {253-1 -- 253-16}, year = {2020}, language = {en} } @article{JohannsenKantCreutzburg2020, author = {Johannsen, Andreas and Kant, Daniel and Creutzburg, Reiner}, title = {Measuring IT security, compliance and data governance within small and medium-sized IT enterprises}, series = {IS and T International Symposium on Electronic Imaging Science and Technology}, journal = {IS and T International Symposium on Electronic Imaging Science and Technology}, publisher = {Society for Imaging Science and Technology (IS\&T)}, address = {Springfield, VA}, issn = {2470-1173}, doi = {10.2352/ISSN.2470-1173.2020.3.MOBMU-252}, pages = {252-1 -- 252-11}, year = {2020}, language = {en} } @article{DietenbergerJechowSannetal.2025, author = {Dietenberger, Manuel and Jechow, Andreas and Sann, Manuela and H{\"o}lker, Franz}, title = {Shedding light on dark taxa: exploring a cryptic diversity of parasitoid wasps affected by artificial light at night}, series = {Scientific Reports}, volume = {15}, journal = {Scientific Reports}, publisher = {Nature}, doi = {10.1038/s41598-025-88111-3}, pages = {1 -- 12}, year = {2025}, abstract = {Artificial light at night (ALAN) contributes to the globally observed insect decline. ALAN attracts nocturnal insects from their native ecosystems and disturbs their functions in the food web. Road lights in this context are ubiquitous and relevant ALAN sources that are often not considered in conservation approaches. In a previous study we showed that shielded LED road lights are suited to be part of conservation measures by effectively reducing the attraction of nocturnal insects. Here we show that this positive effect holds true for parasitoid wasps in an experimental BACI design (Before-After-Control-Impact). Combining morphological with molecular and phylogenetic analyses, we identified 106 individuals (62 morphotypes) of a minimum of 45 genera out of 13 Hymenoptera families. We were able to identify 21 species, 11 of which are newly reported in Southern Germany (Baden-W{\"u}rttemberg). Further combining knowledge on life history and host appearance from our data and the literature, we discuss potential impacts of ALAN ranging from an influence on nocturnal pollination via parasitoid pressure on moth species and biological control of invasive pest species to tritrophic interactions between primary and secondary parasitoids. We conclusively think that shielded LED road lights will reduce the ecological impact of ALAN on parasitoid wasps in a large and undescribed number of taxa with different host associations, likely affecting associated ecosystem functions such as biological control.}, language = {en} } @article{Jechow2024, author = {Jechow, Andreas}, title = {Let there be Skyglow - light pollution from a large outdoor music festival (Lollapalooza Berlin 2016)}, series = {Scientific Reports}, volume = {14}, journal = {Scientific Reports}, publisher = {Nature}, doi = {10.1038/s41598-024-62448-7}, pages = {1 -- 10}, year = {2024}, abstract = {Live music is often linked to elaborate light shows, particularly at large outdoor music festivals. However, artificial light at night is one form of environmental pollution, light pollution, and because outdoor festivals emit a substantial amount of artificial light into the environment, they are a potential source of light pollution. So far, no studies that quantified the impact of such festivals on urban light pollution and skyglow exist. Here, the light pollution produced by a major rock festival (Lollapalooza Berlin 2016 with 70,000 visitors per day in an urban park) was investigated with ground-based radiometry and night-time light data. A small night-sky radiometer installed near the main stages and a calibrated digital camera from a nearby observation spot inside of the park were used to quantify changes in night sky brightness and direct light emissions within the park. The impact of the music festival on the urban skyglow was indeed measurable. Zenith luminance increased locally by up to a factor of 8 and illuminance increased by about 50\% at the observation spot within the park. The radiance detected by night-time satellite was also increased during the festival. This is the first time, that light pollution from such a major rock music event was quantified.}, language = {en} } @article{ScharfGuterdingHenetal.2025, author = {Scharf, Gili and Guterding, Daniel and Hen, Bar and Sarte, Paul M. and Ortiz, Brenden R. and Rozenberg, Gregory Kh. and Holder, Tobias and Wilson, Stephen D. and Jeschke, Harald O. and Ron, Alon}, title = {Pressure tuning of intrinsic and extrinsic sources to the anomalous Hall effect in CrGeTe3}, series = {Physical Review Research}, volume = {7}, journal = {Physical Review Research}, number = {1}, publisher = {American Physical Society}, doi = {10.1103/PhysRevResearch.7.013127}, pages = {1 -- 8}, year = {2025}, abstract = {The integrated Berry curvature is a geometric property that has dramatic implications for material properties. This study investigates the integrated Berry curvature and other contributions to the anomalous Hall effect in CrGeTe3 as a function of pressure. The anomalous Hall effect is absent in the insulating phase of CrGeTe3 and evolves with pressure in a domelike fashion as pressure is applied. The dome's edges are characterized by Fermi surface deformations, manifested as mixed electron and hole transport. We corroborate the presence of bipolar transport using ab initio calculations, which also predict a nonmonotonic behavior of the Berry curvature as a function of pressure. Quantitative discrepancies between our calculations and experimental results indicate that additional scattering mechanisms, which are also strongly tuned by pressure, contribute to the anomalous Hall effect in CrGeTe3.}, language = {en} } @article{MukhinSokolovaChigirevetal.2020, author = {Mukhin, Nikolay and Sokolova, Irina and Chigirev, Dmitry and Rudaja, Lyudmila and Lebedeva, Galina and Kastro, Rene and Bol'shakov, Maxim and Schmidt, Marc-Peter and Hirsch, S{\"o}ren}, title = {Composite Ferroelectric Coatings Based on a Heat-Resistant Polybenzoxazole Polymer Matrix}, series = {Coatings}, volume = {10}, journal = {Coatings}, number = {3}, publisher = {MDPI}, doi = {10.3390/coatings10030286}, pages = {286}, year = {2020}, language = {en} } @article{JohannsenKant2020, author = {Johannsen, Andreas and Kant, Daniel}, title = {IT-Governance, Risiko- und Compliance-Management (IT‑GRC) - Ein Kompetenz-orientierter Ansatz f{\"u}r KMU}, series = {HMD Praxis der Wirtschaftsinformatik}, journal = {HMD Praxis der Wirtschaftsinformatik}, publisher = {Springer}, address = {Wiesbaden}, doi = {10.1365/s40702-020-00625-8}, year = {2020}, language = {de} } @article{LiefoldWagnerPokrakaetal.2018, author = {Liefold, Marius and Wagner, Dennis and Pokraka, Alexander and Schrader, Thomas}, title = {Low-Cost Medical Infrastructure: Triage as intelligent decision support}, series = {Electronic Imaging, Mobile Devices and Multimedia: Enabling Technologies, Algorithms, and Applications}, journal = {Electronic Imaging, Mobile Devices and Multimedia: Enabling Technologies, Algorithms, and Applications}, publisher = {Society for Imaging Science and Technology (IS\&T)}, doi = {10.2352/ISSN.2470-1173.2018.06.MOBMU-116}, pages = {116-1 -- 116-4}, year = {2018}, language = {en} } @article{ChaurasiaGoeckeDe2023, author = {Chaurasia, Prashtan Kumar and Goecke, Sven-Frithjof and De, Amitava}, title = {Monitoring melt pool asymmetry in gas metal arc-directed energy deposition}, series = {Science and Technology of Welding and Joining}, journal = {Science and Technology of Welding and Joining}, number = {Augabe 5/ Band 28}, publisher = {Taylor \& Francis}, issn = {1362-1718 (PRINT)}, doi = {10.1080/13621718.2023.2168933}, pages = {424 -- 432}, year = {2023}, language = {en} } @article{Guterding2023, author = {Guterding, Daniel}, title = {Sparse Modeling Approach to the Arbitrage-Free Interpolation of Plain-Vanilla Option Prices and Implied Volatilities}, series = {Risks}, journal = {Risks}, number = {11 (5)}, publisher = {MDPI}, doi = {https://doi.org/10.3390/risks11050083}, pages = {24}, year = {2023}, abstract = {We present a method for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, which is based on a system of integral equations that relates terminal density and option prices. Using a discretization of the terminal density, we write these integral equations as a system of linear equations. We show that the kernel matrix of this system is, in general, ill-conditioned, so that it cannot be solved for the discretized density using a naive approach. Instead, we construct a sparse model for the kernel matrix using singular value decomposition (SVD), which allows us not only to systematically improve the condition number of the kernel matrix, but also determines the computational effort and accuracy of our method. In order to allow for the treatment of realistic inputs that may contain arbitrage, we reformulate the system of linear equations as an optimization problem, in which the SVD-transformed density minimizes the error between the input prices and the arbitrage-free prices generated by our method. To further stabilize the method in the presence of noisy input prices or arbitrage, we apply an 𝐿1-regularization to the SVD-transformed density. Our approach, which is inspired by recent progress in theoretical physics, offers a flexible and efficient framework for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, without the need to explicitly specify a stochastic process, expansion basis functions or any other kind of model. We demonstrate the capabilities of our method in a number of artificial and realistic test cases.}, language = {en} } @article{LiefoldWagnerDuecketal.2016, author = {Liefold, Marius and Wagner, Dennis and D{\"u}ck, Michael Sebastian and G{\"o}cmez, E. and Kinberger, B. and Gr{\"u}ndel, P. and Gadegast, E. and Beck, Eberhard and Schrader, Thomas}, title = {Konzeption und Entwicklung von mobilen Hard- und Softwarekomponenten zur Verbesserung der Schwangerenvorsorge in L{\"a}ndern der 3. Welt}, series = {Geburtshilfe und Frauenheilkunde}, volume = {76}, journal = {Geburtshilfe und Frauenheilkunde}, publisher = {Thieme}, doi = {10.1055/s-0036-1593060}, pages = {P197}, year = {2016}, language = {de} } @article{HascheKaraschewskiCreutzburg2022, author = {Hasche, Eberhard and Karaschewski, Oliver and Creutzburg, Reiner}, title = {RAW images and videos for 30K panoramic projection using the ACES workflow}, series = {Electronic Imaging}, journal = {Electronic Imaging}, number = {34}, editor = {Society for Imaging Science and Technology,}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/EI.2022.34.3.MOBMU-400}, pages = {400-1 -- 400-13}, year = {2022}, language = {en} } @article{BeckSchraderTetzlaffetal.2018, author = {Beck, Eberhard and Schrader, Thomas and Tetzlaff, Laura and L{\"o}we, Katharina and Schr{\"o}der, Cornelia}, title = {Eine strukturierte Fallanalyse aus dem Critical Incident Reporting System der Bundes{\"a}rztekammer und Kassen{\"a}rztlichen Bundesvereinigung}, series = {Zeitschrift f{\"u}r Evidenz Fortbildung und Qualit{\"a}t im Gesundheitswesen}, volume = {133}, journal = {Zeitschrift f{\"u}r Evidenz Fortbildung und Qualit{\"a}t im Gesundheitswesen}, publisher = {Elsevier}, doi = {10.1016/j.zefq.2018.02.009}, pages = {24 -- 29}, year = {2018}, language = {de} } @article{FlassigMangoldWoelfer2019, author = {Flassig, Robert J. and Mangold, Michael and W{\"o}lfer, Christian}, title = {Towards Design of Self-Organizing Biomimetic Systems}, series = {Advanced Biosystems}, volume = {3}, journal = {Advanced Biosystems}, number = {6}, publisher = {Wiley}, issn = {2366-7478}, doi = {/10.1002/adbi.201800320}, pages = {1800320}, year = {2019}, language = {en} } @article{RedkaMukhinGrishkanichetal.2019, author = {Redka, D. and Mukhin, N. and Grishkanich, A. and Terukov, E. and Hirsch, S{\"o}ren and Ignateva, L.}, title = {NdYAG surface modification of ZnO for solar cells}, series = {Journal of Physics: Conference Series}, volume = {1410}, journal = {Journal of Physics: Conference Series}, publisher = {IOP Science}, doi = {10.1088/1742-6596/1410/1/012106}, pages = {012106}, year = {2019}, language = {en} } @article{SchnitzerKodalle2022, author = {Schnitzer, Julia and Kodalle, Micha}, title = {Brain computer interface (BCI) - UX-design for visual and non-visual interaction by mental commands in the context of technical possibilities}, series = {Electronic imaging}, volume = {34}, journal = {Electronic imaging}, number = {3}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/EI.2022.34.3.MOBMU-402}, pages = {402-1 -- 402-8}, year = {2022}, abstract = {How do we interact with the digital world in the future by only using our thoughts to interact? To interact with the digital world, we use gestures (most common: swipe gestures), voice, facial expressions and mental commands. The latter has become more important by recent press releases about scientific achievements, for example, from Neuralink [1] using invasive technology to control a computer game by thoughts only [2]. Another study says an application can display text on a screen by just thinking about a word [3]. Currently, BCIs are mainly developed for neurotechnology and healthcare. However, it is a question of time when these services will be available for commercial products for everyday life. (Until then, manufacturers have to minimize health risks and face privacy and safety regulations.) The thesis is that in the future, you will be able to interact with your digital devices just by using your thoughts and you'll do much faster. This makes sense in many situations where you f. e. do not have a free hand (manufacturing, sports) or cannot speak (underwater). But for such services, you cannot rely on conventional visual design guidelines or interaction patterns, frameworks or libraries. Navigation interacting with a digital service by mental command has a lot of advantages, the human brain comes naturally with some specific features that force us to find a radically new way to interact with digital interfaces. The following study introduces you first into working conditions with mental commands, comparing invasive and non-invasive technologies, and later on comparing several possibilities of interaction patterns for a BCI of everyday usage. [1] Neuralink is a US neurotechnology company founded in July 2016 by Elon Musk and eight other persons. Neuralink's goal is to develop a device for communication between human brain and computers, a so-called brain-computer-interface(BCI). [2] The Guardian, Fr. 9th April 2021 "Elon Musk startup shows monkey with brain chip implants playing video game". https://www.theguardian.com/technology/2021/apr/09/elon-musk- neuralink-monkey-video-game . [3] Scientific American, 15th July 2021, Neuroscience, author Emily Willingham: "New Brain Implant Transmits Full Words from Neural Signals".}, language = {en} } @article{RizunBordeanNikiforovaetal.2026, author = {Rizun, Nina and Bordean, Ovidiu Niculae and Nikiforova, Anastasija and Beleiu, Ioana Natalia and Revina, Aleksandra}, title = {Generative AI in higher education: Ethical and behavioral factors influencing students' intentions to use ChatGPT}, series = {Computers and Education Open}, volume = {10}, journal = {Computers and Education Open}, publisher = {Elsevier}, doi = {10.1016/j.caeo.2026.100336}, pages = {1 -- 16}, year = {2026}, language = {en} } @incollection{JohannsenKant2022, author = {Johannsen, Andreas and Kant, Daniel}, title = {IT-Governance-, Risiko- und Compliance-Management (IT-GRC) - Ein kompetenzorientierter Ansatz f{\"u}r KMU}, series = {Faktor Mensch}, booktitle = {Faktor Mensch}, editor = {Weber, Kristin and Reinheimer, Stefan}, publisher = {Springer Vieweg}, address = {Wiesbaden}, doi = {10.1007/978-3-658-34524-2_15}, publisher = {Technische Hochschule Brandenburg}, pages = {275 -- 294}, year = {2022}, abstract = {Kleine und mittlere Unternehmen aller Branchen versuchen sich nach wie vor angemessen mit den Herausforderungen der Globalisierung und der digitalen Transformation auseinanderzusetzen. Sie bilden in diesem Zusammenhang wachsende Kompetenz in der Produktionsautomatisierung (Industrie 4.0) und in digitalen Gesch{\"a}fts- und Verwaltungsprozessen aus. In Bezug auf IT-GRC bleiben KMU demgegen{\"u}ber faktisch oft noch unreif. Bestehende Ans{\"a}tze des IT-Governance-, Risiko- und Compliance-Managements sind noch zu wenig f{\"u}r KMU ausgestaltet. Das Kapitel stellt vor diesem Hintergrund einen zun{\"a}chst aus der Literatur abgeleiteten, und dann zusammen mit Feedback von 14 IT-GRC Experten aufgestellten, kompetenzorientierten Ansatz zur Wahrnehmung und Messung des IT-Governance-, Risiko- und Compliance-Managements in KMU vor. Der Ansatz enth{\"a}lt sechs relevante Kompetenzkategorien. Das Kapitel stellt dann zwei abgeleitete, webbasierte Tools zur Messung und Erfassung der Handlungsbedarfe und zur Unterst{\"u}tzung von Management-Maßnahmen vor. Der Ansatz sowie die prototypisch realisierten Tools unterst{\"u}tzen das IT-GRC-Management von KMU gem{\"a}ß ihrem Reifegrad und bedarfsorientiert. Bei der Unterst{\"u}tzung wird der Fokus darauf gelegt, KMU bei der Umsetzung der st{\"a}ndig wachsenden IT-GRC-Anforderungen schlanke und konkrete Methoden, Werkzeuge und Hilfsmittel an die Hand zu geben und die verschiedenen Stakeholder einzubinden.}, subject = {Klein- und Mittelbetrieb}, language = {de} }