@article{MahenthrenWeberBlaschkeHughesetal.2026, author = {Mahenthren, Vijhay Krisshna and Weber-Blaschke, Gabriele and Hughes, Mark and Risse, Michael}, title = {PRecTimber 2.0: Forecasting quantitative and qualitative potentials for wood circularity in Germany, Finland, and Sweden}, series = {Resources, Conservation and Recycling}, volume = {228}, journal = {Resources, Conservation and Recycling}, publisher = {Elsevier BV}, issn = {0921-3449}, doi = {10.1016/j.resconrec.2026.108813}, year = {2026}, abstract = {National bioeconomy strategies in Germany, Finland, and Sweden are expected to increase wood demand, putting pressure on already strained forest resources. Circularity of wood products can reduce this demand by improving resource efficiency, but barriers like uncertain availability and quality of post-consumer wood hinder implementation. This study optimizes and extends the PRecTimber model to forecast post-consumer wood quantities and qualities in Germany (revised with quality information), Finland, and Sweden. By 2050, predicted post-consumer wood volumes are 14.11 Mt in Germany, 1.64 Mt in Finland, and 2.74 Mt in Sweden, mainly from the construction sector. Our quality assessment methodology with scenario analysis (status quo S0 and improved scenarios S1-S2 with +10 and +20 percentage-point gains in key quality factors) reveals that the shares of post-consumer construction sawnwood suitable for lifespan extension and material recycling, respectively, are 25 \% and 59 \% under S0, 36 \% and 50 \% under S1, and 49 \% and 38 \% under S2. Leveraging these quantity and quality insights, policy reforms can support industries and technological innovation to optimize the use of post-consumer wood.}, language = {en} } @misc{KrettekHaglBraml2025, author = {Krettek, Martin and Hagl, Rainer and Braml, Thomas}, title = {Advancing Bridge Weigh-In-Motion with A Novel Optoelectronic Strain Sensor}, series = {IABSE Symposium Tokyo 2025 Report}, journal = {IABSE Symposium Tokyo 2025 Report}, publisher = {International Association for Bridge and Structural Engineering}, address = {Z{\"u}rich}, doi = {10.2749/tokyo.2025.1676}, pages = {1676 -- 1683}, year = {2025}, abstract = {Bridge Weigh-In-Motion (B-WIM) is a method of transforming a bridge structure into an instrument for traffic data collection. This is mainly achieved by a specific arrangement of sensors mounted underneath the bridge, with strain sensors being the most commonly used type. The acquisition and processing of the strain data allows the determination of the actual traffic loads, thus providing valuable information for road infrastructure management. This paper presents a novel B-WIM strain sensor based on optoelectronic position measurement technology. The sensor outperforms the conventionally used strain transducers in terms of their reported resolution capability. The resulting advantages are demonstrated by evaluating data collected from a stiff in-service bridge structure. Using the digital interface of the novel sensor, the paper also proposes a dedicated B-WIM system design. The design aims to simplify the implementation of the B-WIM method in practice.}, language = {en} } @article{Kastl2025, author = {Kastl, Andrea}, title = {Empathy mapping and hybrid persona creation: Understanding older adults' needs in technology design for ageing in place}, series = {Computational and structural biotechnology journal}, volume = {28}, journal = {Computational and structural biotechnology journal}, publisher = {Elsevier}, doi = {10.1016/j.csbj.2025.11.044}, pages = {552 -- 563}, year = {2025}, abstract = {Background: Technology yields the potential to support independence in later life and facilitate ageing in place. Barriers such as limited usability, varying levels of digital literacy, and persistent age-related stereotypes are documented to hinder technology adoption among older adults. User-centered design approaches, such as the persona method, offer strategies to address these challenges. Objective: Personas were created to inform the development of technologies supporting ageing in place by enhancing stakeholders' understanding of needs and technology experience among older adults. Methods: The personas were developed through an iterative process, with this paper detailing the last stage, which employed the a PATHY technique as conceptual framework for content analysis. Eleven focus group discussions were conducted in southern Germany, of which nine were included in the analysis. These involved older adults in need of support, with orthopedic and neurological conditions, and in informal caregiving roles. Results: Five hybrid personas were created to represent the target groups' experiences related to ageing in place, each reflecting needs, problems, existing solutions, habits, sociodemographic characteristics, and dimensions of technology experience. Key factors influencing technology experience and uptake among the personas were identified, including the social context and availability of support, the perceived trade-off between safety and digital privacy, and the persistence of the digital divide. Conclusion: The findings underscore the necessity of adaptable, context-sensitive technology solutions, displayed by the personas' needs, pains, routines and technology experiences. Thereby, the hybrid personas reinforce the importance of a more relational and context-aware approach in user-centered design.}, language = {en} } @misc{HorstmannshoffBorchersVoigtetal.2025, author = {Horstmannshoff, Caren and Borchers, Peggy and Voigt, Karen and M{\"u}ller, Martin and Bauer, Petra}, title = {The Impact of Physiotherapy in a Care Pathway on the Impairment of Mobility and Participation in Older Individuals with Vertigo}, doi = {10.82161/fbn5-pg94}, pages = {1}, year = {2025}, language = {en} } @misc{HorstmannshoffSchmidleBaueretal.2025, author = {Horstmannshoff, Caren and Schmidle, Stephanie and Bauer, Petra and M{\"u}ller, Martin}, title = {Impact of an evidence-based care pathway on the physical activity level in older adults with vertigo, dizziness, and balance disorders}, doi = {10.3205/25ebm053}, year = {2025}, language = {en} } @article{BrandtHeidl2025, author = {Brandt, Hanna and Heidl, Christian}, title = {Happiness and a sense of effectiveness through self-determination, physical and mental health}, series = {Health Psychology: Applications in Clinical and Sports Contexts}, journal = {Health Psychology: Applications in Clinical and Sports Contexts}, publisher = {Nomos}, address = {Baden-Baden}, doi = {10.5771/9783748954804-9}, pages = {9 -- 20}, year = {2025}, language = {en} } @misc{WasicKoenigStrubeetal.2025, author = {Wasic, Catharina and K{\"o}nig, Alexandra and Strube, Johanna and Rascher, Stephanie}, title = {Sketching an inclusive mobility future for shared autonomous vehicles}, doi = {10.82350/QYXW-M917}, year = {2025}, abstract = {New technical development, such as autonomous driving, are now creating a crucial moment for accessible mobility. However, most often systems, such as shared autonomous vehicles (SAV), are not designed according to the diverse needs of people with disabilities. It is still an open question how people with disabilities assess such systems in terms of acceptability and accessibility. Person with impairments need to take part in the design process of SAV to increase acceptance and accessibility. To close this research gap, a Europe-wide online survey was administered and data from 273 people with impairment and 312 without impairment was collected on their assessment of future SAVs. Survey respondents were asked about their intention to use SAVs and to assess the mobility system based on the five facets of the Mobility Divide Index (autonomy, travel time, convenience, comfort, and safety). The findings showed that people with disabilities took a rather critical view of SAVs and revealed a low intention to use. However, the results suggest that people with disabilities see benefits of SAVs for a more independent and easier mobility. Findings also indicate that SAVs are not expected to make their trips faster, comfortable, and safer. Results revealed a gender effect for one MDI facet. Women with impairments assessed SAVs as less comfortable compared to men. No significant differences in the assessment of SAVs between different types of disabilities were found. Qualitative findings regarding the suggestions for improvement were analyzed. Nearly 300 suggestions for improvements were analysed and clustered into 13 categories (trust, safety \& security, on-board staff, entry and exit, availability of information, costs, travel time, previous experiences, availability, wheelchair compatibility, app usage, accessibility in general and others). These findings suggest that information and communication is essential for persons with disabilities when using SAVs. Information transparency must be ensured in future SAVs. The categories identified in the qualitative analysis provide valuable insights to address the information gaps relevant to this target group, particularly regarding accessibility. Based on the findings, in the current development phase of SAVs, the focus should be on building trust and promoting acceptance of these vehicles. In this way, the intention to use SAVs among people with disabilities could be enhanced and a more inclusive mobility future for SAVs is realized.}, language = {en} } @misc{SecklerKronastBaueretal.2019, author = {Seckler, Eva and Kronast, Verena and Bauer, Petra and M{\"u}ller, Martin}, title = {Barriers and Facilitators of multi-disciplinary care pathways in primary care: A Systematic Review}, year = {2019}, language = {en} } @misc{SecklerVerenaPetraetal.2019, author = {Seckler, Eva and Verena, Kronast and Petra, Bauer and M{\"u}ller, Martin}, title = {Development of a multi-disciplinary care pathway for older patients with vertigo, dizziness and balance disorders in primary care: Individual and focus group interviews to explore different perspectives}, year = {2019}, language = {en} } @incollection{Fuchshuber2025, author = {Fuchshuber, Ina}, title = {How to Present Digital Books: An Exploratory Analysis of German Influencer and Publisher Strategies on BookTok}, series = {Vermarktungsstrategien f{\"u}r digitale Medien}, booktitle = {Vermarktungsstrategien f{\"u}r digitale Medien}, publisher = {Springer Gabler}, address = {Wiesbaden}, doi = {10.1007/978-3-658-48796-6_3}, publisher = {Technische Hochschule Rosenheim}, pages = {35 -- 43}, year = {2025}, abstract = {In the evolving digital media landscape, this research explores digital book product representation within TikTok's BookTok community, focusing on German influencers and publishers. The study examines content formats and promotion dynamics for ebooks and audiobooks. Key findings reveal a significant underrepresentation of digital book content compared to print books. Ebook content differs markedly, emphasizing objectification, reading peculiarities, and pricing, while audiobook promotion mirrors traditional book marketing approaches. The research uncovers a disconnect between the digital book market and its BookTok representation. By analyzing content strategies of top influencers and publishers, the study identifies potential opportunities for innovative digital book marketing.}, language = {en} } @article{MayrRoessle2025, author = {Mayr, Ilona and R{\"o}ßle, Felix}, title = {Financial Performance of Mid-and High-Tech Industries in Crisis and Non-Crisis Periods}, series = {Current Issues of Business and Law}, volume = {2025}, journal = {Current Issues of Business and Law}, number = {2(9)}, pages = {14 -- 26}, year = {2025}, abstract = {Investments in research and development (R\&D) are crucial for innovation and economic growth, yet dis-tinctions between high-tech and mid-tech industries may lead tovarying financial outcomes. Building onFuest et al.(2024), this study examines the financial performance of publicly listed high-and mid-techcompanies from a shareholder'sperspective. Using data from theEU Industrial R\&D Investment Scoreboard and LSEGWorkspace for 2,349 listed companies, market-capitalization-weighted portfolios were constructed and benchmarked against global and local market indices. Performance was evaluated using theSharpe ratio and multi-factor asset pricing models (Carhart four-factor and Fama-French five-factor), distinguishing between crisis and non-crisis periods, as well as regional and sectoral variations. Results showthat, at the aggregate level,high-tech portfolios consistentlyand significantly outperform mid-tech and "other" categories on absolute and risk-adjusted bases. Mid-tech indus-tries exhibitresilience during crisis but lower alphasthan high-techindustries,and sectoral heterogeneity high-lightsdiversification benefits. Furthermore, theanalysis reveals investment opportunities in R\&D-intensive sec-tors, emphasizing crisis resilience and regional competitiveness.}, language = {en} } @article{DienerRoessle2025, author = {Diener, Michael and R{\"o}ßle, Felix}, title = {Cloud certification to foster digital transformation management in public administrations}, series = {Current Issues of Business and Law}, volume = {2025}, journal = {Current Issues of Business and Law}, number = {1(8)}, pages = {30 -- 47}, year = {2025}, abstract = {Public administrations are struggling with the adoption of cloud computing and face more severe challenges in the management than corporations due to special requirements regarding data protection and security. Certification of cloud services is the most promising method in overcoming the current issues. However, this paper examines that existing certificates for cloud service providers don't match the requirements of public administrations. The analyzed cloud certificates focus strongly on the information security management. But they only have a general look on data protection management. The missing focus on the special requirements of public administrations with regards to geo location of servers, the US cloud act, and especially prevention of foreign state access of PII data (personally identifiable information) is most critical for the use in public administrations. This article shows that a FedRAMP equivalent certification process combined with a European cloud certificate especially designed for the public administration could be the trigger to a successful and faster cloud implementation in the public administration sector in Europe that is currently underdeveloped. Furthermore, the large market with millions of buying public administrations in 27 European Union countries would create attractive business opportunities for private cloud providers, foster the development of new applications and serve the strategic goal of data sovereignty.}, language = {en} } @misc{EffenbergerStubenrauchDechantetal.2025, author = {Effenberger, Thomas and Stubenrauch, Franz and Dechant, Eduard and Heldwein, Marcelo Lobo}, title = {Resonances and Oscillations in DC Grids}, series = {PCIM Conference 2025}, journal = {PCIM Conference 2025}, doi = {10.30420/566541322}, pages = {8}, year = {2025}, abstract = {A trend has been emerging in the field of industrial automation: direct current (DC) is making a comeback. This is due to the desire for greater energy efficiency and flexible, intelligent energy distribution. However, DC can still exhibit alternating current (AC) components from pulsating loads on an industrial grid, which may excite resonances. This work derives an equivalent circuit model for the grid and verifies it using a motor test bench. Design considerations for the DC link capacitance are presented to enable the integration into a decentralized drive.}, language = {en} } @misc{vandenBergLindner2025, author = {van den Berg, Gregor and Lindner, Johannes}, title = {Coating of Particles in Pneumatic Conveying}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:861-opus4-31678}, pages = {18}, year = {2025}, abstract = {Coating is an important process in the chemical, food and pharmaceutical industry for applying flow agents, adding colorants, applying a protective layer against humidity, for the selective release of the contents or applying a flavor layer to goods. This is usually done in a fluidized bed (Wurster coater) or a coating drum. Pneumatic conveying systems are usually already installed for conveying particulate media, for example between process steps or the filling. In pneumatic conveying, the fluidized state of the Wurster Coater is already present. The basic idea of the current project is to implement the coating step directly in the pneumatic conveying system. Experimental approach: The coating tests were carried out using a vacuum system. For this purpose, various coating chambers with different nozzle arrangements were printed using a rapid prototyper. The nozzles used were also printed in-house and adapted to the requirements. Particles with a diameter of 3 mm were used for the tests and sprayed with a common protective coating as well as blue dye. The particles were heated to 120°C in order to supply the necessary heat to evaporate the solvent. Images of the coated particles were taken and evaluated with ImageJ to analyze the coating result. The amount of coating delivered changes the coating layer linearly as expected. The tests showed that it is possible to coat particles during pneumatic conveying. A comparison with coating in a Wurster coater showed that the amount of overspray is higher than in a Wurster coater, leading a lower efficiency in the coating step in pneumatic conveying though.}, language = {en} } @incollection{VogelComtesseRosner2025, author = {Vogel, Anna and Comtesse, Hannah and Rosner, Rita}, title = {Practice of Clinical Assessment of Prolonged and Traumatic Grief}, series = {Psychotherapy for Prolonged and Traumatic Grief}, booktitle = {Psychotherapy for Prolonged and Traumatic Grief}, publisher = {Routledge}, address = {New York}, isbn = {9781003429777}, doi = {10.4324/9781003429777-4}, publisher = {Technische Hochschule Rosenheim}, pages = {35 -- 50}, year = {2025}, abstract = {This chapter describes the practical advantages of implementing a structured diagnostic procedure for bereaved individuals with suspected prolonged and traumatic grief. It provides a step-by-step practical guideline for the diagnostic process with formulation aids and behavioral instructions. Suggestions are presented on how the interviewer can deal with special situations and/or special populations in order to promote valid diagnostic results. This chapter therefore aims not only to encourage the implementation of a structured diagnostic process for bereaved individuals but also to provide practical examples of how this can be put into practice.}, language = {en} } @article{SchwarzKnieleLindner2025, author = {Schwarz, Benedikt and Kniele, H. and Lindner, Johannes}, title = {Automated Process Optimization in a Novel TripleShaft Mixer with Adaptive Mixing Modes}, series = {Chemie Ingenieur Technik}, journal = {Chemie Ingenieur Technik}, publisher = {Wiley-VCH}, address = {Weinheim}, doi = {10.1002/cite.70060}, year = {2025}, abstract = {A novel multi-purpose mixer was set up, which allows the change of the blade angle during the process and provides aflow field with respect to the needs of the mixing task. It features as well as a coaxial stirrer for highly viscous liquids andhence has three degrees of freedom. The stirrer considers the integration and validation of an optimization strategy forthe autonomous identification of an optimum operating point based on automated tests. The validation was conducted ina mixing process with several process input parameters, which is commonly used in industrial applications. The powerdraw of the main stirrer was used as a optimization parameter, representing the power used for dispersing. The speedand direction of the main and secondary stirrers, respectively, as well as the angle of the stirrer blades, were used as inputprocesses. The proposed control scheme automatically identifies and corrects drops in energy dissipation rates.}, language = {en} } @article{SchwarzKrauseLindner2026, author = {Schwarz, Benedikt and Krause, Peter and Lindner, Johannes}, title = {A Dynamic Hydrocyclone Adapting to Different Operating Points by Changing the Inlet Area}, series = {Chemical Engineering and Technology}, journal = {Chemical Engineering and Technology}, publisher = {Wiley-VCH}, address = {Weinheim}, doi = {10.1002/ceat.70154}, year = {2026}, abstract = {In this study, a novel hydrocyclone design was developed featuring a variable inlet geometry, which enables adjustment of the inlet area during operation. This allows control over the flow velocity within the cyclone, thereby maintaining a constant tangential velocity despite changes in volumetric flow rate. The prototype demonstrated a constant separation efficiency across a volumetric flow range spanning a factor of two between its minimum and maximum capacities. Two control strategies were investigated: operation at constant pressure drop and operation at constant inlet velocity, both under varying flow rates and inlet geometries. To initially examine the influence of key parameters, hydrocyclones with fixed geometries were fabricated using rapid prototyping and employed in experimental trials. These findings informed the subsequent development and construction of a dynamically adaptive steel prototype capable of dynamic geometrically adjustment.}, language = {en} } @misc{BleyDees2025, author = {Bley, Sandra and Dees, Rebekka}, title = {The effectiveness of generative AI in university teaching}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:861-opus4-31064}, pages = {27}, year = {2025}, abstract = {This study examines the effectiveness of generative AI in higher education in three typical teaching settings: AI in domain-specific contexts (TS 1), AI tutors in teaching (TS 2) and scientific work in the age of AI (TS 3). A quasi-experimental design with three experimental groups and a control group was used. The findings reveal significant differences in AI literacy and usage patterns among students. The constructive-aligned TS 3 'SciAI' demonstrates the most pronounced effects, particularly in knowledge and understanding AI and ethical considerations. From this, optimal strategies for integration of AI into educational practices can be de-rived.}, language = {en} } @misc{ThalhammerZaglacherSolfLeipoldetal., author = {Thalhammer, Regina and Zaglacher, Melina and Solf-Leipold, Barbara and L{\"u}ftl, Katharina}, title = {Development, piloting, and feasibility of a complex intervention to prevent insufficient home care of community-dwelling older adults (Prev-It)}, language = {en} } @article{SkudlikLueftlThalhammeretal.2025, author = {Skudlik, Steffi and L{\"u}ftl, Katharina and Thalhammer, Regina and Zaglacher, Melina and M{\"u}ller, Martin}, title = {Experiences of members of the care triad on transitioning from home to a nursing home: a qualitative study}, series = {BMC Geriatrics}, volume = {25}, journal = {BMC Geriatrics}, number = {1}, publisher = {Springer Nature}, doi = {10.1186/s12877-025-06586-1}, year = {2025}, language = {en} } @unpublished{Helbig2010, author = {Helbig, Michael}, title = {On the presentation of pointed Hopf algebras}, doi = {10.48550/arXiv.1003.5879}, pages = {1 -- 13}, year = {2010}, abstract = {We give a presentation in terms of generators and relations of Hopf algebras generated by skew-primitive elements and abelian group of group-like elements with action given via characters. This class of pointed Hopf algebras has shown great importance in the classification theory and can be seen as generalized quantum groups. As a consequence we get an analog presentation of Nichols algebras of diagonal type.}, language = {en} } @inproceedings{SchwarzLindner2025, author = {Schwarz, Benedikt and Lindner, Johannes}, title = {Automated Process Optimization in Mixing with Adaptive and Dynamic Mixing Modes}, series = {PARTEC 2025}, booktitle = {PARTEC 2025}, year = {2025}, abstract = {Mixing plays a crucial role in industry, for e.g., fine and petrochemicals, food, pharmaceuticals, and mineral processing. The selection of the stirrer is based on the desired flow pattern and the rheological properties of the material being processed. A change in the mixing task or a significant shift in material properties during the process can lead to decreased efficiency, longer mixing times, or poorer mixing quality. To address the need for handling various tasks across a wide range of applications with the same mixer, a multi-purpose mixer with adjustable tools was developed. It consists of a coaxial stirrer with an inner and an outer stirrer. The blades of the inner stirrer can be changed in inclination during the process. This allows different tasks, such as dispersion, aeration, and suspension, to be performed efficiently in succession without the need for tool changes. Additionally, the process parameters can be dynamically changed to compensate for changes in the process. Energy input into the fluid serves as a key parameter to quantify the quality of a dispersion process. The three independent actuators can be used to achieve the best energy input. To identify the optimal settings, a control algorithm called the "automated design of experience" was developed. This algorithm adjusts the speed of the main and coaxial stirrers and the blade angle in a sequential manner, evaluating whether these changes lead to improved or worsened energy input. It is hence possible to determine optimum mixing parameters in an automated way.}, language = {en} } @misc{SchwarzLindner2025, author = {Schwarz, Benedikt and Lindner, Johannes}, title = {Variable volume flows in a hydrocyclone by changing the inlet geometry during the process}, series = {PARTEC 2025}, journal = {PARTEC 2025}, year = {2025}, abstract = {Motivation: Hydrocyclones are designed for a specific operating point but react badly to a change in operating conditions. Reducing the flow rate results in lower centrifugal forces and hence separation efficiency. Increasing the flow rate increases the pressure loss, while the separation efficiency suffers from increased turbulence. It is also not possible to react to modifications of the material or liquid phase to be separated. The aim of the present development is to create a cyclone that can react to variable operating parameters to keep the separation efficiency at a high level. Material \& Methodology: Good separation in cyclones requires a stable formation of the secondary vortex, which can be characterized by high tangential flow velocity (Schubert 2003). By implementing a variable cross-section in the inlet channel, the feeding velocity into the cyclone can be kept constant at changing flow rates to maintain the secondary vortex and keep comparable separation efficiency and pressure loss. An inline turbidity measurement at the upstream outlet can be used to monitor dynamically the separation efficiency. The variable cross-section area can be controlled depending on the fluctuating volume flow or on a specific outlet concentration based on the measured turbidity. Experiments showed that operating the system at a constant pressure loss improves the separation efficiency despite a reduction of the volume flow. Efficient separation at different or even fluctuating volume flow is hence possible.}, language = {en} } @inproceedings{SchwarzLindner2024, author = {Schwarz, Benedikt and Lindner, Johannes}, title = {An approach to automated process optimization in mixing using adaptive and dynamic mixing modes}, series = {9 th Asian Particle Technology Symposium}, booktitle = {9 th Asian Particle Technology Symposium}, year = {2024}, language = {en} } @phdthesis{Helbig2009, author = {Helbig, Michael}, title = {Lifting of Nichols Algebras}, doi = {10.5282/edoc.10378}, school = {Technische Hochschule Rosenheim}, pages = {107}, year = {2009}, abstract = {Nichols algebras are a fundamental building block of pointed Hopf algebras. Part of the classi cation program of nite-dimensional pointed Hopf algebras with the lifting method of Andruskiewitsch and Schneider [6] is the determination of the liftings, i.e., all possible deformations of a given Nichols algebra. The classi cation was carried out in this way in [11] when the group of group-like elements is abelian and the prime divisors of the order of the group are > 7. In this case the appearing Nichols algebras are of Cartan type. Based on recent work of Heckenberger about diagonal Nichols algebras [29, 28, 27] we compute explicitly the liftings of some Nichols algebras not treated in [11]; namely we lift - all Nichols algebras with Cartan matrix of type A2 (Theorem 6.3.3), - some Nichols algebras with Cartan matrix of type B2 (Theorem 6.4.3), and - some Nichols algebras of two Weyl equivalence classes of non-standard type (Theorem 6.5.3), giving new classes of nite-dimensional pointed Hopf algebras. Crucial is the knowledge of a good presentation of the Nichols algebra and its liftings: We want to have an explicit description in terms of generators and (non-redundant) relations, and a basis; this requires new ideas and methods that generalize those in [11]. In this spirit, we describe Hopf algebras generated by skew-primitive elements and an abelian group with action given via characters (including Nichols algebras and their liftings) in Theorem 5.4.1. The relations form a Grobner basis and are given by a combinatorial property involving the theory of Lyndon words. Furthermore, in Theorem 7.3.1 we give a necessary and su cient criterion to check whether a given set of iterated q-commutators establishes a restricted PBW basis for a given realization of the relations. Also with the help of this criterion we determine the redundant relations in the examined Nichols algebras and their liftings.}, language = {en} } @book{Helbig2009, author = {Helbig, Michael}, title = {Lifting of Nichols Algebras - A Contribution to the Classification of Pointed Hopf Algebras}, publisher = {S{\"u}dwestdeutscher Verlag f{\"u}r Hochschulschriften}, address = {Saarbr{\"u}cken}, isbn = {978-3-8381-1084-4}, publisher = {Technische Hochschule Rosenheim}, pages = {112}, year = {2009}, abstract = {Nichols algebras are a fundamental building block of pointed Hopf algebras. Part of the classification program of finite-dimensional pointed Hopf algebras with the lifting method of Andruskiewitsch and Schneider is the determination of the liftings, i.e., all possible deformations of a given Nichols algebra. The classification was carried out in this way in several special cases when the appearing Nichols algebras are of Cartan type. We compute explicitly the liftings of some Nichols algebras not of Cartan type or of Cartan type without restrictions on the group order. These build up new classes of finite-dimensional pointed Hopf algebras. Furthermore, we give a necessary and sufficient PBW basis criterion for a class of pointed Hopf algebras and present them in terms of generators and relations. These Hopf algebras can be seen as generalized Quantum groups.}, language = {en} } @unpublished{Helbig2010, author = {Helbig, Michael}, title = {A PBW basis criterion for pointed Hopf algebras}, doi = {10.48550/arxiv.1011.0140}, pages = {1 -- 33}, year = {2010}, abstract = {We give a necessary and sufficient PBW basis criterion for Hopf algebras generated by skew-primitive elements and abelian group of group-like elements with action given via characters. This class of pointed Hopf algebras has shown great importance in the classification theory and can be seen as generalized quantum groups. We apply the criterion to classical examples and liftings of Nichols algebras which were determined in arxiv.org:1003.5882.}, language = {en} } @misc{HelbigSeliger2025, author = {Helbig, Michael and Seliger, Norbert}, title = {Combinatorics of Inductance States in Reconfigurable Air Coils}, series = {Proceedings 2nd International Conference on Recent Advances in Mathematics and Informatics (ICRAMI'25)}, journal = {Proceedings 2nd International Conference on Recent Advances in Mathematics and Informatics (ICRAMI'25)}, isbn = {978-9909-00-770-9}, pages = {8}, year = {2025}, abstract = {We propose a group theory based mathematical model for unambiguous inductance states of a reconfigurable air coil inductor utilizing elastic snapping of wire segments. Vertical (axial) and horizontal winding symmetries under group actions reveal distinguishable tuning regions and individual variation states therein. The model is applied to coils of prismatic (cylinder like) and truncated pyramidal (conical like) shape with edges forming a regular polygon as basis, and verified by numerical magnet field simulation.}, language = {en} } @article{HammesStrohmGeislerMoroderetal.2025, author = {Hammes, Sascha and Strohm, Johannes and Geisler-Moroder, David and Weninger, Johannes and Miller, Josef and Hauer, Martin and Zech, Philipp and Wambsganß, Mathias and Pfluger, Rainer}, title = {Technical and organizational barriers and solution strategies for the implementation of BIM: An empirical study with a focus on the lighting sector}, series = {Results in Engineering}, volume = {29}, journal = {Results in Engineering}, publisher = {Elsevier}, doi = {10.1016/j.rineng.2025.108520}, pages = {22}, year = {2025}, abstract = {Building Information Modelling (BIM) offers considerable potential for the construction industry, particularly in terms of transparency, increased efficiency and integrated data management throughout the entire life cycle of buildings. However, technical and organizational barriers exist, which limit the widespread adoption of BIM. This study therefore employed two large-scale, online surveys to analyze the technical and organizational aspects of BIM implementation in lighting design. The results show that, in addition to technical barriers, successful BIM implementation hinges on knowledge, acceptance, and organizational learning ability. Training, internal processes and a supportive corporate culture are crucial for the effective use of new workflows. Fragmented planning processes and asynchronous participation reinforce technical limitations. To fully realize the potential of BIM, an integrated approach combining technological innovations with organizational learning and collaborative structures is essential. Key solutions include modular, interoperable BIM systems, open interfaces, and standardized data structures.}, language = {en} } @article{Kellner2024, author = {Kellner, Robert}, title = {Making Effective Videos and Live Online Lectures Quickly with a Live Composite Format}, series = {International Journal of Innovation in Science and Mathematics Education (IJISME)}, volume = {2023}, journal = {International Journal of Innovation in Science and Mathematics Education (IJISME)}, number = {Vol. 31 No. 5}, publisher = {University of Sydney}, doi = {10.30722/IJISME.31.05.003}, pages = {29 -- 39}, year = {2024}, abstract = {Instructional videos are the dominant mode of content delivery in higher education. They can be an effective tool for delivering educational content, providing flexibility in time and location and improving students' understanding of the material. The effectiveness of such videos may be enhanced by applying principles for multimedia design, which are based on a cognitive theory of multimedia learning. One way to adhere to those principles is by showing the instructor together with additional visuals on screen. Some studies suggest that this may have a positive effect on student learning and overall performance. The combination of the instructor and other visuals is usually done in post-production editing, which can be a time-consuming process. In this paper, a live composition video format is proposed, where the instructor is integrated into the presentation during recording. Using this approach, it is possible for the instructor to interact with added visuals directly, requiring little to no post-production. Furthermore, this method can also be used to enrich and increase the efficacy of synchronous live online lectures.}, language = {en} } @inproceedings{KrommesHuberPschereretal.2025, author = {Krommes, Sandra and Huber, Gretel and Pscherer, Theresa and Nemeth, Isabell}, title = {Circular economy in life cycle costing: a literature review in the construction sector}, series = {Journal of Physics: Conference Series}, booktitle = {Journal of Physics: Conference Series}, publisher = {IOP Science}, doi = {10.1088/1742-6596/3140/13/132012}, pages = {1 -- 7}, year = {2025}, abstract = {Circular economy (CE) has become important in reducing the environmental impact of the construction sector. For the transformation from linear to CE, decision support tools and methods are needed to assess and promote CE for constructions. With regard to sustainable financial decisions, life cycle costing (LCC) is the preferred method. However, the LCC approaches and their application in CE research differ. Based on a systematic literature review, the relevance of refurbishment in operation, reuse, recycling and disposal at end-of-life (EoL) in LCC is assessed. As a result, LCC has gained relevance in the construction sector, but CE plays a subordinate role in LCC applications. Costs or benefits of CE are often neglected. However, some research have shown that refurbishment as well as reuse and recycling can outweigh higher initial cost over lifetime. The internalisation of environmental and social impacts or even benefits are also rare. In particular, there is a lack of research on how to internalise the environmental benefits of refurbishment, reuse and recycling or how to effectively incentivise higher CE efforts in LCC in order to encourage decision-making in construction towards CE.}, language = {en} } @misc{LeiterHeitzmannVersenetal.2025, author = {Leiter, Nina and Heitzmann, Sebastian and Versen, Martin and Wohlschl{\"a}ger, Maximilian and L{\"o}der, Martin G.J. and Laforsch, Christian}, title = {Identification of Microplastic Contamination in Food using FD-FLIM}, series = {2025 IEEE Sensors Applications Symposium (SAS)}, journal = {2025 IEEE Sensors Applications Symposium (SAS)}, publisher = {IEEE}, doi = {10.1109/SAS65169.2025.11105138}, pages = {1 -- 5}, year = {2025}, abstract = {Microplastics have emerged as a significant environmental concern, particularly due to their potential impact on food safety and human health. This study uses frequency-domain fluorescence lifetime imaging microscopy to investigate the presence and effects of microplastics in four food types—ham, honey, fish, and lettuce. Samples were prepared with known quantities of high-density polyethylene particles, and their phase-dependent fluorescence lifetimes were analyzed to distinguish between contaminated and uncontaminated food. The results indicate that fluorescence lifetime analysis can effectively identify microplastic contamination, revealing distinct fluorescence characteristics for each food matrix. This research underscores the importance of innovative detection methods in ensuring food safety, highlighting the need for further studies on automated microplastic detection.}, language = {en} } @misc{WiedlSehySchmidetal., author = {Wiedl, Sebastian and Sehy, Michaela and Schmid, Thomas and Bonauer, Markus and M{\"u}ller, Norbert and List, Manuela}, title = {Neue Wege f{\"u}r WPC: Altholz und klimaresiliente Laubholzarten als alternative Verst{\"a}rkungsstoffe}, series = {Technomer 2025}, journal = {Technomer 2025}, editor = {Seefried, Andreas and Stommel, Markus}, pages = {46 -- 46}, language = {en} } @incollection{KlaasEltayebKriechbaumeretal.2025, author = {Klaas, Lena and Eltayeb, Asmaa and Kriechbaumer, Dorottya and Roeb, Martin and Sattler, Christian}, title = {\(Ca_{1-x} Sr_x MnO_{3-\delta}\) granules, pellets, foams: Influence of fabrication conditions and microstructure on oxidation kinetics}, series = {Solid State Ionics}, booktitle = {Solid State Ionics}, number = {422/4}, publisher = {Elsevier}, address = {New York}, doi = {10.1016/j.ssi.2025.116803}, publisher = {Technische Hochschule Rosenheim}, pages = {116803 -- 116816}, year = {2025}, abstract = {Microstructure and oxidation kinetics are closely intertwined factors that significantly influence the behavior of materials in oxidative environments. This relationship is of particular importance for redox materials such as \(Ca_{1-x} Sr_x MnO_{3-\delta}\), where reversible oxygen ions exchange and oxidation state shifts are key to their functionality. In the first study, scanning electron microscope (SEM) was used to examine how varying Sr content affects the morphology and microstructure of \(Ca_{1-x} Sr_x MnO_{3-\delta}\) powder compositions. The results indicate that increasing Sr content leads to smaller particle sizes and improved particle size homogeneity. Granules with Sr concentrations ranging from 0 \% to 40 \% exhibit notable changes in morphology. However, the microporosity and d50 vary slightly across the samples in a non-monotonic manner, with no clear trend emerging with respect to Sr concentration. The second study investigates how macrostructural forms, such as foams and pellets, impact oxidation kinetics in \(Ca_{0.8} Sr_{0.2} MnO_{3-\delta}\). Parameters including particle size distribution of the raw material, overall microporosity, and structural characteristics of these macrostructures were analyzed for their effect on oxidation rates. Findings reveal that macrostructural configuration, alongside microstructural features like microporosity, significantly impacts oxidation kinetics. These studies collectively underscore the critical relationship between dopant concentration, microstructural characteristics, and structural morphology in determining the oxidative behavior of \(Ca_{1-x} Sr_x MnO_{3-\delta}\), providing key insights into optimizing material performance in redox environments.}, subject = {Oxidation kinetics}, language = {en} } @incollection{KriechbaumerBudamaRoebetal.2025, author = {Kriechbaumer, Dorottya and Budama, Vishnu and Roeb, Martin and Sattler, Christian}, title = {Fuels - Hydrogen - Hydrogen Production | Thermochemical}, series = {Encyclopedia of Electrochemical Power Sources (Second Edition)}, booktitle = {Encyclopedia of Electrochemical Power Sources (Second Edition)}, number = {Vol. 6}, edition = {2.}, publisher = {Elsevier}, address = {New York}, doi = {10.1016/B978-0-323-96022-9.00006-2}, publisher = {Technische Hochschule Rosenheim}, pages = {278 -- 287}, year = {2025}, abstract = {Green hydrogen is expected to play a major role in the energy mix of the future as it is not only an important feedstock for chemical production but also an energy carrier and fuel. For the transition from fossil routes to green production new, sustainable technologies are needed. Solar thermal energy can be directly utilized for hydrogen production without electrification via thermochemical cycles. Several thousands of cycles have already been investigated, the main types utilize redox materials with phase change properties, materials with non-stoichiometric behavior and sulfur-based cycles. This article gives an overview on the different classes of thermochemical cycles, their state of development, economics and their possibilities for a future industrial application.}, subject = {Wasserstoffgewinnung}, language = {en} } @article{StecherZiegltrumReiprichetal.2025, author = {Stecher, Dominik and Ziegltrum, Lukas and Reiprich, Paul and Fuchs, Christian and Maier, Andreas and Schmidt, Jochen}, title = {Neural network synthetic dataset generation for fault detection in district heating substations}, series = {Smart Energy}, volume = {20}, journal = {Smart Energy}, publisher = {Elsevier}, doi = {10.1016/j.segy.2025.100206}, pages = {100206}, year = {2025}, abstract = {District heating systems (DHS) play a vital role in sustainable heating solutions and the decarbonization of the energy sector. However, inefficiencies due to undetected faults in substations result in high return temperatures, increasing heat losses, and limiting the integration of renewable energy sources. The lack of publicly available labeled datasets poses a significant challenge for fault detection using supervised learning models. To address this issue, this study explores three machine learning-based synthetic data generation techniques - time series forecasting, generative adversarial networks (GANs), and fault signature transfer. These methods aim to increase publicly available data either by sharing the generating model or a synthetic dataset. The novelty lies in the combination of advanced supervised machine learning methods being applied to a large, fully labeled data set to create new, equally labeled data for publication, as, to our knowledge, no such dataset has been compiled before. We evaluate our methods on the first-of-its-kind ILSE dataset, which includes real-world smart meter data from 547 substations and 1,162 reviewed faults from a German DHS network, including detailed root cause information. Overall, time series forecasting achieves an MAPE of 3\% to 10\% for inlet and outlet temperature and 25\% to 40\% for heat load and flow rate, both of which are within year-to-year variance. For GANs, specifically TimeGAN, we found a discriminative score of about 0.10 compared to 0.24 in the original publication when tested on Energy benchmark data. Fault signature transfer has yet to yield usable results, most likely due to the high variance in the fault signatures, fault duration, and overlapping or multiple root causes. Finally, fault data in the synthetic data is not yet good enough for practical use, e.g. training a fault detector.}, language = {en} } @unpublished{FeistlHeldPickl2025, author = {Feistl-Held, Manuela and Pickl, Peter}, title = {On the mean-field limit for the Vlasov-Poisson system in two dimensions}, doi = {10.48550/arXiv.2509.17821}, year = {2025}, abstract = {We present a probabilistic proof of the mean-field limit and propagation of chaos of a classical N-particle system in two dimensions with Coulomb interaction force of the form \$f^N(q)=\pm\frac{q}{|q|^2}\$ and \$N\$-dependent cut-off at \$|q|>N^{-2}\$. In particular, for typical initial data, we show convergence of the Newtonian trajectories to the characteristics of the Vlasov-Poisson system. The proof is based on a Gronwall estimate for the maximal distance between the exact microscopic dynamics and the approximate mean-field dynamics. Thus our result leads to a derivation of the Vlasov-Poisson equation from the microscopic \$N\$-particle dynamics with force term arbitrary close to the physically relevant Coulomb force.}, language = {en} } @misc{HeindlBleyMisera2025, author = {Heindl, Johanna and Bley, Sandra and Misera, Susanne}, title = {Digital Transformation in the Hospitality Sector - Effects on Professional Competence Profiles}, series = {Trends in Vocational Education and Training Research, VETNET Conference Series}, volume = {2025}, journal = {Trends in Vocational Education and Training Research, VETNET Conference Series}, number = {8}, editor = {N{\"a}gele, C. and Stalder, B.E. and Kaiser, F. and Malloch, M. and Kersh, N.}, doi = {10.21240/vetcon/2025/ecer/36}, pages = {123-137}, year = {2025}, abstract = {Context: Digital transformation is changing work processes and skill requirements in almost all economic sectors. The hotel and restaurant industry faces a particular challenge. It must combine traditional, highly personalized services with new digital technologies. The German vocational education system shows increasing digital integration. However, systematic analyses are missing. These analyses should examine which digital competencies are included in trainingprograms. They should also show how professional requirements are changing. Approach: This study uses a multi-method research design. The first step examined key regulatory documents. These included training regulations and curricula for hotel specialists and cooks. We used qualitative content analysis for this examination. The second step involved 33 guided expert interviews. We interviewed stakeholders from companies, vocational schools, associations, and staff members. We analyzed the data using qualitative-deductive methods. The analysis followed theoretically based category systems. Findings: The document analysis shows that digital content exists in the regulatory materials. We found explicit digital content (n=37) and implicit digital content (n=52). The materials include requirements for trainees such as process understanding, teamwork skills, and adaptability. However, gaps exist in several areas. These include data analysis, creativity, lifelong learning, and cross-disciplinary interest. The interview analysis identified five central transformation areas. These are digital sales, digital guest journey, process optimization, digital staff management, and data-based decision support. These changes create new skill requirements on three levels: Knowledge (e.g , IT basics and tool know-how), Skills (for example, handling digital systems, organization, and communication), and Attitudes (for example, openness, willingness to learn, and team orientation). Conclusions: The results show that technological developments in the hotel and restaurant industry have wide-reaching effects. They do not only require technical adjustments but also deep pedagogical and didactic changes in vocational education. A tension exists between economic requirements (such as automation) and the need for social-emotional skills. This tension is especially important in direct guest contact. The study emphasizes the importance of systematic skill development. This development must consider professional, personal, and organizational aspects. A stronger integration of future-oriented skills is necessary. These skills include creativity, reflection ability, and willingness for lifelong learning. This integration will help prepare professionals for digital change in a sustainable way.}, language = {en} } @article{MazzarellaFleischmannCarradinietal.2025, author = {Mazzarella, Renato and Fleischmann, Carolin and Carradini, Stephen and Kapitza, Stephanie}, title = {Success Factors of Crowdfunding Projects - A Cross-Country Comparison between USA, Germany and the UK}, series = {CURRENT ISSUES OF BUSINESS AND LAW}, volume = {1}, journal = {CURRENT ISSUES OF BUSINESS AND LAW}, number = {8}, year = {2025}, abstract = {Crowdfunding as an alternative financing method has been extensively studied for its success factors. However, the current success rates of crowdfunding projects remain below 50\%. The aim of this article is to investigate the how number of backers, size of the funding goal, and the team favorite award influence a project's success and to investigate whether the influence of them differs across countries. Through a statistical analysis of over 100,000 crowdfunding projects sourced from the crowdfunding platform Kickstarter, projects originating from the USA, Germany, and the United Kingdom were investigated and compared. Number of backers had the biggest impact on project success. For German projects, the influence of backers was significantly higher than in the UK and USA. The size of the funding goal emerged as the most influential factor in UK and Germany, while the team favorite award did not show a significant influential effect in the whole sample.}, language = {en} } @article{Kuhn2025, author = {Kuhn, Michael}, title = {Why Engineers Should Read More Novels}, series = {Chemie Ingenieur Technik (CIT)}, journal = {Chemie Ingenieur Technik (CIT)}, publisher = {Wiley-VCH}, issn = {0009-286X}, doi = {10.1002/cite.12011}, year = {2025}, abstract = {Engineering work is much less solid and much airier than often assumed. And precisely for this reason, another rather airy activity is a good training for it: namely the reading of novels. I argue for two benefits of novel reading: first, reading exercises skills central to engineering design, such as imagination and fictionality competence; second, it trains the ethical capabilities of the reader, e.g., the ability of taking over other person's perspectives. These benefits are illustrated by using the examples of different novels in which the focus is laid especially on sustainability topics. Lastly, some uses of novels in engineering education are briefly discussed.}, language = {en} } @misc{KruseSchoepferMayretal.2025, author = {Kruse, Tobias and Sch{\"o}pfer, Fabian and Mayr, Andreas R. and Schmidt, Thorsten and Hanz, Thomas}, title = {Building service equipment - from source characterization and prediction to validation in buildings}, series = {Proceedings of DAS|DAGA 2025}, journal = {Proceedings of DAS|DAGA 2025}, year = {2025}, language = {en} } @misc{SchoepferSchandaChateauvieuxHellwig2025, author = {Sch{\"o}pfer, Fabian and Schanda, Ulrich and Ch{\^a}teauvieux-Hellwig, Camille}, title = {Suggestion for a round-robin test on the measurement of vibration reduction indices on CLT junctions}, series = {Proceedings of Forum Acusticum/Euronoise}, journal = {Proceedings of Forum Acusticum/Euronoise}, year = {2025}, language = {en} } @misc{KruseMayrSchandaetal.2025, author = {Kruse, Tobias and Mayr, Andreas R. and Schanda, Ulrich and Sch{\"o}pfer, Fabian}, title = {FH-IPTOOLS: Predicting wastewater noise in timber constructions - a project introduction}, series = {Proceedings of Forum Acusticum/Euronoise}, journal = {Proceedings of Forum Acusticum/Euronoise}, year = {2025}, abstract = {The research project FH-IPTOOLS is a joint project between Rosenheim Technincal University of Applied Sciences (THRo) and the University of Applied Sciences D{\"o}pfer (HSD) in collaboration with industrial partners and timber construction associations. The aim is to develop prediction tools for sound insulation, focusing on acoustic comfort and the perception of noise from technical service equipment. The project focuses on wastewater systems in timber and lightweight constructions. Concepts need to be developed to ensure that acoustic comfort is taken into account in the design process. HSD is working on the psychoacoustic aspects. Signal detection theory will be used to formulate suitable evaluation methods to assess noise from building service equipment. Listening tests and field measurements will be used to develop criteria for sound insulation in timber construction to improve acoustic comfort. As part of the project, structure-borne sound characterisation will be carried out at THRo on a reception plate test rig. Therefore a reception plate with similar properties to timber frame constructions will be used. The aim is to develop methods for the direct measurement of structure-borne sound power in timber and lightweight constructions, while also determining airborne sound power. Initial results will be presented in the paper.}, language = {en} } @misc{KruseSchoepferSchandaetal.2024, author = {Kruse, Tobias and Sch{\"o}pfer, Fabian and Schanda, Ulrich and Mayr, Andreas R. and Dehm, Maximilian}, title = {Experience with the high mobility reception plate for source characterization according to EN 15657}, series = {INTER-NOISE and NOISE-CON Congress and Conference Proceedings}, journal = {INTER-NOISE and NOISE-CON Congress and Conference Proceedings}, doi = {10.3397/IN_2024_4067}, pages = {8261 -- 8268}, year = {2024}, abstract = {EN 12354-5 describes methods for the prediction of noise from technical equipment based on the airborne sound radiation and the structure-borne sound excitation. This paper considers methods to characterize the source in terms of structure-borne-sound (sbs) emission. Laboratory methods for sbs source characterization are given in EN 15657. In current research and development projects at Rosenheim Technical University of Applied Sciences these methods are applied to fully characterize technical equipment such as heat pumps or ventilation systems. This includes the determination of the equivalent blocked force, the source single equivalent free velocity and the source single equivalent mobility. EN 15657 describes various methods to determine the required properties. Recent project experience showed that this is essentially necessary because the most suitable method has to be applied depending on the nature of the technical equipment. This paper presents experiences with indirect measurement methods on the high-mobility plate and the direct measurement method given in EN 15657.}, language = {en} } @misc{HeitzmannRajanVersenetal.2025, author = {Heitzmann, S. and Rajan, A. S. and Versen, M. and Leiter, N.}, title = {Identification of plastics in foodstuff using Rapid-FLIM and neural networks}, series = {SMSI 2025 Conference - Sensor and Measurement Science International}, journal = {SMSI 2025 Conference - Sensor and Measurement Science International}, doi = {10.5162/SMSI2025/P30}, pages = {290 -- 291}, year = {2025}, abstract = {The analysis of fluorescence lifetimes has the potential to reliably differentiate plastics from foodstuffs. A setup for use in an industrial process is required to work in real time. The combination of Rapid fluorescence lifetime imaging microscopy (Rapid-FLIM) and neural networks shows significant improvements in capture time compared to other FLIM technologies, while achieving a reliable differentiation of foodstuffs and plastics.}, language = {en} } @article{LeiterWohlschlaegerVersenetal.2025, author = {Leiter, Nina and Wohlschl{\"a}ger, Maximilian and Versen, Martin and Harter, Sonja D. and Kießlich, Tina and Lederer, Franziska and Clauß, Stefanie and Schlosser, Dietmar and Armanu, Emanuel Gheorghita and Eberlein, Christian and Heipieper, Hermann J. and L{\"o}der, Martin G. J. and Laforsch, Christian}, title = {Effects of defined organic layers on the fluorescence lifetime of plastic materials}, series = {Analytical and Bioanalytical Chemistry}, volume = {417}, journal = {Analytical and Bioanalytical Chemistry}, number = {16}, doi = {10.1007/s00216-025-05888-y}, pages = {3651 -- 3663}, year = {2025}, abstract = {Plastics have become an integral part of modern life, and linked to that fact, the demand for and global production of plastics are still increasing. However, the environmental pollution caused by plastics has reached unprecedented levels. The accumulation of small plastic fragments—microplastics and nanoplastics—potentially threatens organisms, ecosystems, and human health. Researchers commonly employ non-destructive analytical methods to assess the presence and characteristics of microplastic particles in environmental samples. However, these techniques require extensive sample preparation, which represents a significant limitation and hinders a direct on-site analysis. In this context, previous investigations showed the potential of fluorescence lifetime imaging microscopy (FLIM) for fast and reliable identification of microplastics in an environmental matrix. However, since microplastics receive an environmental coating after entering nature, a challenge arises from organic contamination on the surface of microplastic particles. How this influences the fluorescence signal and the possibility of microplastic detection are unknown. To address this research gap, we exposed acrylonitrile butadiene styrene (ABS) and polyethylene terephthalate (PET) plastic samples to peptides, proteins, bacteria, and a filamentous fungus to induce organic contamination and mimic environmental conditions. We analyzed the fluorescence spectra and lifetimes of the samples using fluorescence spectroscopy and frequency-domain fluorescence lifetime imaging microscopy (FD-FLIM), respectively. Our results demonstrate that reliably identifying and differentiating ABS and PET was possible via FD-FLIM, even in the presence of these biological contaminations. These findings highlight the potential of this technique as a valuable tool for environmental monitoring and plastic characterization, offering a rapid and efficient alternative to currently used analytical methods.}, language = {en} } @misc{GraupnerFleischmann2025, author = {Graupner, Emma and Fleischmann, Carolin}, title = {Interpersonal Processes in Human-AI Teams: Toward an Updated Framework for Team Processes}, series = {AMCIS 2025 Proceedings}, journal = {AMCIS 2025 Proceedings}, year = {2025}, abstract = {This paper explores the integration of Artificial Intelligence (AI) into workplace teams and its influence on interpersonal dynamics. Drawing on Marks et al.'s (2001) team processes framework, we examine how AI influences interpersonal processes like conflict management, motivation, and affect management. Findings suggest that while AI can enhance objectivity, motivation, and efficiency, it may also introduce new tensions and anxieties about job security. We critically analyze both the opportunities and risks associated with AI integration, including the role of trust and individual perceptions. To address gaps in existing research, we outline a qualitative research agenda exploring the nature and distribution of interpersonal processes in human-AI teams. Preliminary interviews reveal that AI has strong motivational potential, though emotional responses vary, with some team members expressing fears and differing adaptation speeds.}, language = {en} } @article{SchoenauPanhuysenSonntagetal.2025, author = {Sch{\"o}nau, and Panhuysen, and Sonntag, and Banse, and Seel, and Jachmann, and Schulze, Achim and H{\"u}ttl, and Landes,}, title = {String outages in photovoltaic plants}, series = {Renewable Energies}, volume = {3}, journal = {Renewable Energies}, number = {1}, publisher = {Sage}, doi = {10.1177/27533735251347879}, pages = {12}, year = {2025}, abstract = {In this work, the factors leading to string outages are examined, and an enhanced method for detecting faults at the sub-string level is presented. Utilizing GPT4-o to analyze O\&M reports of 5089 photovoltaic plants, we classified outages according to the affected components and the underlying origin, identifying the most frequent string fault causes. An approach employing CUSUM Charts is introduced to identify substring outages within PV systems effectively. The methodology utilizes fundamental field data that is commonly available in practice. A filtering approach, combined with the use of CUSUM control charts, minimizes false positives, ensuring that only consistent underperformance is flagged as an out-age. The methodology returns far fewer false positives and more stable error intervals for substring outages than a former monitoring approach. Overall, the study demonstrates a significant improvement in detecting substring outages. The advanced methodology enables more effective O\&M for PV plants, where substring outages are reliably identified after a short detection time.}, language = {en} } @misc{KlaebeHagedornGropengiesseretal.2025, author = {Kl{\"a}be, Steffen and Hagedorn, Stefan and Gropengießer, Francis and Schweser, Thomas}, title = {Beyond the Data Warehouse: Modern and fast Data Analytics in Actian Vector.}, series = {Datenbanksysteme f{\"u}r Business, Technologie und Web (BTW 2025)}, journal = {Datenbanksysteme f{\"u}r Business, Technologie und Web (BTW 2025)}, doi = {10.18420/BTW2025-35}, pages = {691 -- 697}, year = {2025}, abstract = {Modern data analytics cover a wide range of tools and frameworks besides traditional SQL-based analytics, leading to the need to transform traditional data warehouse solutions into data platforms. In this paper we focus on ecosystem integration, query performance and ease-of-use as key differentiators. We spotlight capabilities we introduced into our analytical database system Actian Vector with respect to these differentiators and highlight challenges we faced when applying research ideas to a production-ready system. The described capabilities cover ecosystem integrations with Apache Spark and a containerized services framework, cost model optimizations for robust query planning and several features to improve usability and manageability of the system.}, language = {en} } @book{StiebitzSchweserToft2024, author = {Stiebitz, Michael and Schweser, Thomas and Toft, Bjarne}, title = {Brooks' Theorem}, series = {Springer Monographs in Mathematics}, journal = {Springer Monographs in Mathematics}, publisher = {Springer Nature Switzerland}, isbn = {9783031500640}, doi = {10.1007/978-3-031-50065-7}, pages = {655}, year = {2024}, language = {en} } @article{SchweserStiebitz2017, author = {Schweser, Thomas and Stiebitz, Michael}, title = {Degree choosable signed graphs}, series = {Discrete Mathematics}, volume = {340}, journal = {Discrete Mathematics}, number = {5}, publisher = {Elsevier BV}, issn = {0012-365X}, doi = {10.1016/j.disc.2017.01.007}, pages = {882 -- 891}, year = {2017}, language = {en} } @article{Schweser2019, author = {Schweser, Thomas}, title = {DP-degree colorable hypergraphs}, series = {Theoretical Computer Science}, volume = {796}, journal = {Theoretical Computer Science}, publisher = {Elsevier BV}, issn = {0304-3975}, doi = {10.1016/j.tcs.2019.09.010}, pages = {196 -- 206}, year = {2019}, language = {en} } @article{SchweserStiebitz2019, author = {Schweser, Thomas and Stiebitz, Michael}, title = {Partitions of multigraphs under minimum degree constraints}, series = {Discrete Applied Mathematics}, volume = {257}, journal = {Discrete Applied Mathematics}, publisher = {Elsevier BV}, issn = {0166-218X}, doi = {10.1016/j.dam.2018.10.016}, pages = {269 -- 275}, year = {2019}, language = {en} } @article{Bang‐JensenBellittoSchweseretal.2019, author = {Bang-Jensen, J{\o}rgen and Bellitto, Thomas and Schweser, Thomas and Stiebitz, Michael}, title = {On DP-coloring of digraphs}, series = {Journal of Graph Theory}, volume = {95}, journal = {Journal of Graph Theory}, number = {1}, publisher = {Wiley}, issn = {0364-9024}, doi = {10.1002/jgt.22535}, pages = {76 -- 98}, year = {2019}, abstract = {DP-coloring is a relatively new coloring concept by Dvoř{\´a}k and Postle and was introduced as an extension of list-colorings of (undirected) graphs. It transforms the problem of finding a list-coloring of a given graph with a list-assignment to finding an independent transversal in an auxiliary graph with vertex set . In this paper, we extend the definition of DP-colorings to digraphs using the approach from Neumann-Lara where a coloring of a digraph is a coloring of the vertices such that the digraph does not contain any monochromatic directed cycle. Furthermore, we prove a Brooks' type theorem regarding the DP-chromatic number, which extends various results on the (list-)chromatic number of digraphs.}, language = {en} } @article{BangJensenBellittoSchweseretal.2020, author = {Bang-Jensen, J{\o}rgen and Bellitto, Thomas and Schweser, Thomas and Stiebitz, Michael}, title = {Haj{\´o}s and Ore Constructions for Digraphs}, series = {The Electronic Journal of Combinatorics}, volume = {27}, journal = {The Electronic Journal of Combinatorics}, number = {1}, publisher = {The Electronic Journal of Combinatorics}, issn = {1077-8926}, doi = {10.37236/8942}, year = {2020}, language = {en} } @article{SchweserStiebitz2020, author = {Schweser, Thomas and Stiebitz, Michael}, title = {Partitions of hypergraphs under variable degeneracy constraints}, series = {Journal of Graph Theory}, volume = {96}, journal = {Journal of Graph Theory}, number = {1}, publisher = {Wiley}, issn = {0364-9024}, doi = {https://doi.org/10.1002/jgt.22575}, pages = {7 -- 33}, year = {2020}, abstract = {The paper deals with partitions of hypergraphs into induced subhypergraphs satisfying constraints on their degeneracy. Our hypergraphs may have multiple edges, but no loops. Given a hypergraph and a sequence of vertex functions such that for all , we want to find a sequence of vertex disjoint induced subhypergraphs containing all vertices of such that each hypergraph is strictly -degenerate, that is, for every nonempty subhypergraph there is a vertex such that . Our main result in this paper says that such a sequence of hypergraphs exists if and only if is not a so-called hard pair. Hard pairs form a recursively defined family of configurations, obtained from three basic types of configurations by the operation of merging a vertex. Our main result has several interesting applications related to generalized hypergraph coloring problems.}, language = {en} } @article{Schweser2021, author = {Schweser, Thomas}, title = {Generalized hypergraph coloring}, series = {Discussiones Mathematicae Graph Theory}, volume = {41}, journal = {Discussiones Mathematicae Graph Theory}, number = {1}, doi = {10.7151/dmgt.2168}, pages = {103 -- 121}, year = {2021}, language = {en} } @article{BangJensenSchweserStiebitz2022, author = {Bang-Jensen, J{\o}rgen and Schweser, Thomas and Stiebitz, Michael}, title = {Digraphs and Variable Degeneracy}, series = {SIAM Journal on Discrete Mathematics}, volume = {36}, journal = {SIAM Journal on Discrete Mathematics}, number = {1}, publisher = {Society for Industrial \& Applied Mathematics (SIAM)}, issn = {0895-4801}, doi = {10.1137/20M1386827}, pages = {578 -- 595}, year = {2022}, language = {en} } @article{vonPostelSchweserStiebitz2022, author = {von Postel, Justus and Schweser, Thomas and Stiebitz, Michael}, title = {Point Partition Numbers: Perfect Graphs}, series = {Graphs and Combinatorics}, volume = {38}, journal = {Graphs and Combinatorics}, number = {2}, publisher = {Springer Science and Business Media LLC}, issn = {0911-0119}, doi = {10.1007/s00373-021-02410-w}, pages = {11}, year = {2022}, language = {en} } @article{vonPostelSchweserStiebitz2022, author = {von Postel, Justus and Schweser, Thomas and Stiebitz, Michael}, title = {Point partition numbers: Decomposable and indecomposable critical graphs}, series = {Discrete Mathematics}, volume = {345}, journal = {Discrete Mathematics}, number = {8}, publisher = {Elsevier BV}, issn = {0012-365X}, doi = {10.1016/j.disc.2022.112903}, year = {2022}, abstract = {In the present paper we extend the following three coloring concepts for the class of finite undirected graphs having multiple edges but no loops. First of all, the generalized coloring concept, in which the same colored vertices of a graph induce a subgraph satisfying a prescribed graph property. Secondly, the concept of variable degeneracy, which was introduced by Borodin, Kostochka and Toft in 2000; this makes it possible to give a common generalization of the point partition number and the list chromatic number. Finally, the DP-coloring concept as introduced by Ďvor{\´a}k and Postle in 2018, where a list assignment of a graph is replaced by a cover. Combining these three coloring concepts leads to generalizations of various classical coloring results, including the theorems of Brooks, of Gallai, and of Erdős, Rubin and Taylor. Our main result is a DP-version of a theorem about partitions of graphs into a fixed number of induced subgraphs with bounded variable degeneracy due to Borodin, Kostochka, and Toft.}, language = {en} } @article{KostochkaSchweserStiebitz2023, author = {Kostochka, Alexandr V. and Schweser, Thomas and Stiebitz, Michael}, title = {Generalized DP-colorings of graphs}, series = {Discrete Mathematics}, volume = {346}, journal = {Discrete Mathematics}, number = {11}, publisher = {Elsevier BV}, issn = {0012-365X}, doi = {10.1016/j.disc.2022.113186}, pages = {20}, year = {2023}, abstract = {In the present paper we extend the following three coloring concepts for the class of finite undirected graphs having multiple edges but no loops. First of all, the generalized coloring concept, in which the same colored vertices of a graph induce a subgraph satisfying a prescribed graph property. Secondly, the concept of variable degeneracy, which was introduced by Borodin, Kostochka and Toft in 2000; this makes it possible to give a common generalization of the point partition number and the list chromatic number. Finally, the DP-coloring concept as introduced by Ďvor{\´a}k and Postle in 2018, where a list assignment of a graph is replaced by a cover. Combining these three coloring concepts leads to generalizations of various classical coloring results, including the theorems of Brooks, of Gallai, and of Erdős, Rubin and Taylor. Our main result is a DP-version of a theorem about partitions of graphs into a fixed number of induced subgraphs with bounded variable degeneracy due to Borodin, Kostochka, and Toft.}, language = {en} } @inproceedings{HambergerMurgulSchmidtetal.2025, author = {Hamberger, Anna and Murgul, Sebastian and Schmidt, Jochen and Heizmann, Michael}, title = {Fretting-Transformer: Encoder-Decoder Model for MIDI to Tablature Transcription}, series = {Proceedings of the 50th International Computer Music Conference 2025}, booktitle = {Proceedings of the 50th International Computer Music Conference 2025}, publisher = {The International Computer Music Association}, pages = {438 -- 445}, year = {2025}, abstract = {Music transcription plays a pivotal role in Music Information Retrieval (MIR), particularly for stringed instruments like the guitar, where symbolic music notations such as MIDI lack crucial playability information. This contribution introduces the Fretting-Transformer, an encoderdecoder model that utilizes a T5 transformer architecture to automate the transcription of MIDI sequences into guitar tablature. By framing the task as a symbolic translation problem, the model addresses key challenges, including string-fret ambiguity and physical playability. The proposed system leverages diverse datasets, including DadaGP, GuitarToday, and Leduc, with novel data pre-processing and tokenization strategies. We have developed metrics for tablature accuracy and playability to quantitatively evaluate the performance. The experimental results demonstrate that the Fretting-Transformer surpasses baseline methods like A* and commercial applications like Guitar Pro. The integration of context-sensitive processing and tuning/capo conditioning further enhances the model's performance, laying a robust foundation for future developments in automated guitar transcription.}, language = {en} } @article{HerzMuscatStruebbe2025, author = {Herz, Jonas and Muscat, Dirk and Str{\"u}bbe, Nicole}, title = {The Influence of Fillers on the Reinforcement Capabilities of Polypropylene Based Mono-Material and Core-Shell Fibers in Concrete, a Comparison}, series = {Polymers}, volume = {17}, journal = {Polymers}, number = {13}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/polym17131781}, pages = {24}, year = {2025}, abstract = {Noncorrosive concrete reinforcement, such as polymer fibers, is needed to overcome the current issues caused by corroded steel reinforcements. Fibers made of polypropylene show a low bonding behavior in concrete. Fillers can help to overcome this issue but often lead to reduced mechanical properties. Core-shell fibers, which split the mechanical properties and the bonding behavior between the core and the shell component, could be a solution. This study investigates mono-material and core-shell fibers produced with calcium carbonate and bentonite fillers and compares their behavior in tensile tests, density measurements, contact angle measurements, topography measurements, single fiber pull-out tests, reflected light microscopy, and thermogravimetric analysis. The fillers caused an increased drawability, resulting in higher mechanical properties. Further, in the core-shell fibers, the calcium carbonate increased the surface roughness, which led to a better anchoring of the fiber in concrete, which was also visible in the deformation during pull-out observed in reflected light microscopy pictures. The thermogravimetric analysis showed a delay in onset of degradation for fibers containing bentonite.}, language = {en} } @inproceedings{YilmazMariAsametal.2025, author = {Yilmaz, Tugce and Mari, Jorge and Asam, Johann and Kirner, Michael and List, Andreas and Fantauzzo, Lucia and Seliger, Norbert}, title = {AC Cycling Testing of SiC MOSFET Power Module}, series = {Proccedings International exhibition and conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 2025)}, booktitle = {Proccedings International exhibition and conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 2025)}, publisher = {VDE VERLAG GMBH}, address = {Berlin}, isbn = {978-3-8007-6541-6}, doi = {10.30420/566541341}, pages = {2562 -- 2567}, year = {2025}, abstract = {This paper details the development of an accelerated AC cycling test bench for evaluating the aging mechanisms of SiC MOSFET power modules. Contrary to classical HTGS and DGS which only exercise gate source stresses the AC Cycler switched under high voltage and current. Operating for about 235 hours, the system maintained stable thermal conditions thanks to an integrated cooling system. Key precursors of aging, such as increases in threshold voltage and on-state resistance were identified using static characterization curve tracer before and after the test. Gate charge and Vdson were also measured on-line with specially developed gate drivers.}, language = {en} } @article{Helbig2012, author = {Helbig, Michael}, title = {On the Lifting of Nichols Algebras}, series = {Communications in Algebra}, volume = {40}, journal = {Communications in Algebra}, number = {9}, publisher = {Informa UK Limited}, doi = {10.1080/00927872.2011.568029}, pages = {3317 -- 3351}, year = {2012}, abstract = {Nichols algebras are a fundamental building block of pointed Hopf algebras. Part of the classification program of finite-dimensional pointed Hopf algebras with the lifting method of Andruskiewitsch and Schneider is the determination of the liftings, i.e., all possible deformations of a given Nichols algebra. Based on recent work of Heckenberger about Nichols algebras of diagonal type we compute explicitly the liftings of all Nichols algebras with generalized Cartan matrix of type A 2, some Nichols algebras with generalized Cartan matrix of type B 2, and some Nichols algebras of two Weyl equivalence classes of non-standard type giving new classes of finite-dimensional pointed Hopf algebras.}, language = {en} } @misc{WindlThalhammerMuelleretal.2025, author = {Windl, Maximiliane and Thalhammer, Philipp and M{\"u}ller, David and Schmidt, Albrecht and Feger, Sebastian}, title = {PrivacyHub: A Functional Tangible and Digital Ecosystem for Interoperable Smart Home Privacy Awareness and Control}, series = {In CHI Conference on Human Factors in Computing Systems (CHI '25), April 26-May 01, 2025, Yokohama, Japan.}, journal = {In CHI Conference on Human Factors in Computing Systems (CHI '25), April 26-May 01, 2025, Yokohama, Japan.}, doi = {10.1145/3706598.3713517}, year = {2025}, abstract = {Hubs are at the core of most smart homes. Modern cross-ecosystem protocols and standards enable smart home hubs to achieve interoperability across devices, offering the unique opportunity to integrate universally available smart home privacy awareness and control features. To date, such privacy features mainly focus on individual products or prototypical research artifacts. We developed a cross-ecosystem hub featuring a tangible dashboard and a digital web application to deepen our understanding of how smart home users interact with functional privacy features. The ecosystem allows users to control the connectivity states of their devices and raises awareness by visualizing device positions, states, and data flows. We deployed the ecosystem in six households for one week and found that it increased participants' perceived control, awareness, and understanding of smart home privacy. We further found distinct differences between tangible and digital mechanisms. Our findings highlight the value of cross-ecosystem hubs for effective privacy management.}, language = {en} } @article{Helbig2014, author = {Helbig, Michael}, title = {Ideals for character Hopf algebras}, series = {Journal of Pure and Applied Algebra}, volume = {218}, journal = {Journal of Pure and Applied Algebra}, number = {4}, publisher = {Elsevier}, doi = {10.1016/j.jpaa.2013.08.003}, pages = {634 -- 641}, year = {2014}, abstract = {We give a description in terms of generators and relations of character Hopf algebras. These Hopf algebras play a central role in the classification of pointed Hopf algebras and can be seen as generalized quantum groups. Furthermore, we get as a consequence an analog presentation of Nichols algebras of diagonal type.}, language = {en} } @inproceedings{Seliger2025, author = {Seliger, Norbert}, title = {Introducing Environmental Sustainability in an RF and EMC Lab Course Utilizing Reusable, Recyclable and Biodegradable Circuits}, series = {Proceedings IEEE educon 2025}, booktitle = {Proceedings IEEE educon 2025}, publisher = {IEEE}, doi = {10.1109/EDUCON62633.2025.11016365}, pages = {9}, year = {2025}, abstract = {We propose to introduce environmental sustainability in a radio frequency (RF) and electromagnetic compatibility (EMC) laboratory course for an electrical engineering bachelor's program utilizing reusable, easily recyclable and ecologically harmless (biodegradable) circuits. Our concept is based on the replacement of state-of-the-art printed circuit boards by substrates with mechanically structured adhesive Cu and Zinc films. Furthermore, organic based circuit carriers can be substituted by biodegradable paper substrates. As an example for the RF lab, we discuss the design, simulation and experimental characterization of a microwave low-pass filter with 1.2GHz cut-off frequency. Secondly, for an EMC lab we suggest a prototype for power integrity (PI) studies based on the current imbalance method for reducing common mode radiated emission. As a novel feature during the lab course, the instructor in addition gives a lecture highlighting the electronic waste challenge, which is accompanied by group discussions on sustainability and recycling. As a final lab course task students are asked to disassemble the boards or prepare them for reuse, followed by material sorting and submission to recycling institutions.}, language = {en} } @inproceedings{SeligerLeirich2025, author = {Seliger, Norbert and Leirich, Nico}, title = {Reconfigurable single-layer air coil inductor with bistable compliant windings}, series = {Proceedings EPE 25}, booktitle = {Proceedings EPE 25}, publisher = {EPE Association}, doi = {10.34746/epe2025-0012}, pages = {10}, year = {2025}, abstract = {We present an air coil with bistable compliant single layer windings. Due to stable elastic snapping deformation of wire segments, the self-inductance of the air coil can be precisely varied in multiple steps. A numerical and analytical design methodology is proposed and successfully validated by magneto-quasi-static field simulations and experiments on prototypes.}, language = {en} } @inproceedings{PueschelSeliger2025, author = {P{\"u}schel, Maximilian and Seliger, Norbert}, title = {Multiple-Frequency Three Coil Inductive Power Transmission with Non-Linear Relay Resonator}, series = {Proceedings Southeastcon 2025}, booktitle = {Proceedings Southeastcon 2025}, publisher = {IEEE}, isbn = {979-8-3315-0484-7}, issn = {1558-058X}, doi = {10.1109/SoutheastCon56624.2025.10971670}, pages = {34 -- 39}, year = {2025}, abstract = {We propose near-field inductive power transfer with three coils in the frequency range of a few MHz. The relay coil is part of a non-linear resonator having a diode connected in parallel to the resonant capacitor. We achieve power transfer at multiple frequencies which can be tuned by the input power level and mutual coupling between the coils. Higher harmonic generation is found dominant at lower input power, whereas subharmonic generation (period doubling and period quadrupling) is observed at high levels. Power transfer at subharmonics reveals robustness against level perturbations due to pronounced amplitude hysteresis effect. A circuit simulation based on standard non-linear diode SPICE models confirms the experimental results which are obtained on a demonstration prototype.}, language = {en} } @misc{KimmerleDvorskyLiess2025, author = {Kimmerle, Sven-Joachim and Dvorsky, Karl and Liess, Hans-Dieter}, title = {Failure Rates from Data of Field Returns}, series = {MATHMOD Short Contribution Volume 2025}, journal = {MATHMOD Short Contribution Volume 2025}, publisher = {reposiTUm, TU Wien}, address = {Wien}, doi = {10.34726/9011}, pages = {23 -- 24}, year = {2025}, abstract = {To determine failure rates is a challenge, if there are only a few failures and typical failure rates are low. As an application example we are interested in failure rates of electrical automotive components for automated/autonomous driving. As method we focus here on the exploitation of field data. Our contribution classifies different approaches from statistics and shows how this can be applied to real-world production figures as available in industry.}, subject = {Mathematische Modellierung}, language = {en} } @unpublished{FeistlHeldPickl2025, author = {Feistl-Held, Manuela and Pickl, Peter}, title = {On the mean-field limit for the Vlasov-Poisson system}, series = {arXiv}, journal = {arXiv}, doi = {10.48550/arXiv.2504.01471}, year = {2025}, abstract = {We present a probabilistic proof of the mean-field limit and propagation of chaos of a classical N-particle system in three dimensions with Coulomb interaction force of the form \$f^N(q)=\pm\frac{q}{|q|^3}\$ and \$N\$-dependent cut-off at \$|q|>N^{-\frac{5}{12}+\sigma}\$ where \$\sigma>0\$ can be chosen arbitrarily small. This cut-off size is much smaller than the typical distance to the nearest neighbour. In particular, for typical initial data, we show convergence of the Newtonian trajectories to the characteristics of the Vlasov-Poisson system. The proof is based on a Gronwall estimate for the maximal distance between the exact microscopic dynamics and the approximate mean-field dynamics. Thus our result leads to a derivation of the Vlasov-Poisson equation from the microscopic \$N\$-particle dynamics with force term arbitrary close to the physically relevant Coulomb force.}, language = {en} } @article{WiedlObermeierKarlingeretal.2024, author = {Wiedl, Sebastian and Obermeier, Frederik and Karlinger, Peter and M{\"u}ller, Norbert}, title = {Renewable Reinforcement Fibers: Fiber Reinforcement Made of Wood and Cellulose for Technical Components}, series = {Plastic Insights}, volume = {2024}, journal = {Plastic Insights}, number = {09}, pages = {60 -- 64}, year = {2024}, language = {en} } @misc{BoschertKruseBehrensetal.2025, author = {Boschert, Andreas and Kruse, Alexander and Behrens, Grit and Zehner, Mike and Heigl, Martin}, title = {Helios: Introducing a Project for Forecasting Photovoltaic Yields using a Small Network of All-Sky Imagers and Meteorological Sensors}, series = {EnviroInfo 2024}, volume = {2024}, journal = {EnviroInfo 2024}, editor = {Gesellschaft f{\"u}r Informatik e.V.,}, publisher = {Gesellschaft f{\"u}r Informatik e.V.}, address = {Bonn}, doi = {10.18420/env2024_01}, pages = {17 -- 26}, year = {2025}, abstract = {The Helios project aims to improve the accuracy of solar radiation forecasting, which is crucial for integrating fluctuating power sources like solar power into electrical grids. This manuscript provides a comprehensive overview of the project, details the installed measurement devices on a ground-mounted PV system, and presents initial results on calibrating three All-Sky Imagers. Additionally, it discusses the integration of monitoring data and the application of image recognition for cloud detection and movement.}, language = {en} } @article{DietlingerKasparikUnterhitzenbergeretal.2025, author = {Dietlinger, Flora Katrin and Kasparik, Barbara and Unterhitzenberger, Johanna and Saupe, Laura Bebra and Rosner, Rita}, title = {Challenges and facilitators in treating unaccompanied young refugees with posttraumatic stress disorder in a dissemination trial - a qualitative study with psychotherapists}, series = {Child and Adolescent Psychiatry and Mental Health}, volume = {19}, journal = {Child and Adolescent Psychiatry and Mental Health}, publisher = {Springer}, doi = {10.1186/s13034-025-00873-w}, pages = {15}, year = {2025}, language = {en} } @misc{Sailer2024, author = {Sailer, Marcel}, title = {Video-based patient monitoring in long-term inpatient care}, series = {Sustainability and Crises - Challenges and Innovation for Gerontechnology}, journal = {Sustainability and Crises - Challenges and Innovation for Gerontechnology}, year = {2024}, abstract = {Purpose Video-based monitoring systems in long-term inpatient care represent an opportunity to increase patient safety. Technologies using infrared technology, as well as video and sound transmission are used to recognize movement to prevent falls and enable the continuous recording of vital parameters. Individual assessment of the necessity and limits of application from a nursing care perspective is essential due to the restriction on the patient's privacy and autonomy. As an example, the Oxevision monitoring system is analysed in more detail in this project. Care professionals as well as the public were asked about the potentials and risk factors of video-based monitoring systems using semi-structured interviews and an online survey. This paper intends to provide a basis for discussion for the use of video-based monitoring systems in long-term inpatient care facilities. The aim is to conduct qualitative and quantitative fundamental research as a basis for generating data and a critical analysis of the topic. In addition to displaying the opinion of the general public, the limitations and potential benefits of these technologies are illustrated and ethical aspects are discussed. Method The research was conducted in a mixed-method design by a student research group. All surveys are based on prior literature research however, the analysis is based on defined criteria. Interviews were conducted with nursing care professionals (n=4) and people from the public (n=244) were surveyed on the topic of video-based monitoring systems via an online survey. The interviews were analysed using inductive, structured content analysis methods as Mayring describes to be a suitable analysis method. The online survey was analysed using statistical methods to draw credible quantitative results. Results and Discussion The results clearly show that video-based monitoring systems have both advantages and disadvantages as well as ethical aspects and factors that influence the acceptance of video-based monitoring which must be weighed up individually. From the total responses of n=244, 47,1\% (n=115) of survey participants are in favour of the use of monitoring systems in nursing, while 40,1\% are undecided. The most frequently mentioned advantages from the interviews included continual vital sign monitoring, faster reactions in emergencies, a reduction in the workload of nursing staff and an increase in patient safety, for example through improved fall prevention for patients. In contrast, 185 people (75,8\%) of the survey participants are of the opinion that video monitoring systems should not be used across the board and that specific groups of people should be considered differentially. Frequently cited reasons for this are data protection, restriction of privacy and self-determination, as well as the fear of data abuse. The hereby collected data suggests that a general interest in the implementation of video-based monitoring systems is apparent among the population. In order to increase acceptance, of aspects such as data protection, privacy and possible abuse of data, further research is needed to establish a reliable conclusion to this matter.}, subject = {active assisted living}, language = {en} } @incollection{HolmbergSchunkVonKutzleben2024, author = {Holmberg, Christine and Schunk, Michaela and Von Kutzleben, Milena}, title = {Mixed Methods und Triangulation}, series = {Versorgungsforschung}, booktitle = {Versorgungsforschung}, editor = {Pfaff, Holger and Neugebauer, Edmund A.M. and Ernstmann, Nicole and H{\"a}rter, Martin and Hoffmann, Falk}, isbn = {978-3-658-42862-4 978-3-658-42863-1}, doi = {10.1007/978-3-658-42863-1_17}, pages = {231 -- 244}, year = {2024}, language = {en} } @article{HoepflSchellhorn2025, author = {H{\"o}pfl, Felix and Schellhorn, Marina}, title = {Balancing innovation and trust: Assessing artificial intelligence's role in medical history taking and physician perspectives on patient care}, series = {DESGIN+}, volume = {2025}, journal = {DESGIN+}, publisher = {AccScience Publishing (ASP) DESIGN+}, address = {Singapur}, doi = {10.36922/dp.7675}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:861-opus4-29528}, pages = {1}, year = {2025}, abstract = {This study explores the potential of artificial intelligence (AI) in medical history taking (anamnesis) and assesses its acceptance using technology acceptance models. Through nine expert interviews with physicians from diverse medical backgrounds, the study aims to understand concerns and anticipated benefits of AI in the doctor-patient relationship. To demonstrate AI's applications, digital anamnesis surveys were conducted with two actual patients, and the resulting data were interpreted by AI and reviewed by physicians. Findings indicate that physicians view AI as potentially beneficial, expecting that AI can facilitate improvements in care quality, efficiency, and time savings. Despite initial concerns about AI's ability to address individual patient needs and its impact on the doctor-patient relationship, there is significant interest in integrating AI tools into daily practice. Key issues include patient constitution, the effort-to-benefit ratio, and potential risks to patient trust. The study identifies six areas for further research: Economic impact and cost-benefit analysis, patient acceptance and trust, stress reduction and job satisfaction, effects on doctor-patient relationships, development of verification mechanisms, and ethical and legal considerations. These findings underscore the complexities of AI integration in health care, emphasizing the need to address concerns about patient individuality, data privacy, and interpersonal relationships while harnessing AI's potential.}, language = {en} } @misc{KimmerleDvorskyLiess2025, author = {Kimmerle, Sven-Joachim and Dvorsky, Karl and Liess, Hans-Dieter}, title = {Failure Rates from Data of Field Returns - How to Prove High Reliability for Electric Components?}, series = {MATHMOD 2025 (11th Vienna International Conference on Mathematical Modelling)}, journal = {MATHMOD 2025 (11th Vienna International Conference on Mathematical Modelling)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:861-opus4-29421}, pages = {1}, year = {2025}, abstract = {To determine failure rates is a challenge, if there are only a few failures and a low failure rate should be checked. As an application example, we are interested in failure rates of electrical automotive components for automated/autonomous driving. Basically, three methods are common: (i) exploitation of field data, (ii) standardized handbooks with failure rates, e.g. the FIDES guide, and (iii) laboratory long term exposure tests. We discuss shortly the (dis)advantages of each method and focus on the statistics behind method (i). Moreover, our poster sketches how this can be applied to data as available in industry.}, subject = {Reliabilit{\"a}t}, language = {en} } @incollection{Lueken2025, author = {L{\"u}ken, Jan-Diederich}, title = {Towards a Circular Economy - Business Rationale and Steps Forward}, series = {Carbon Free - The Way Forward}, booktitle = {Carbon Free - The Way Forward}, publisher = {De Gruyter}, address = {Boston}, doi = {10.1515/9783110784299-024}, publisher = {Technische Hochschule Rosenheim}, pages = {673 -- 732}, year = {2025}, abstract = {The circular economy is a topic of increasing awareness - among the public, in politics, in business and in science. However, scientific publications on this topic come more often from technical disciplines than from business administration and even less often from economics. Yet policymakers and business leaders are already developing strategies and roadmaps for the transition to a circular economy. So what does "circular economy" mean, where does it lead, and how can companies prepare for it? This paper attempts to answer these questions by combining a political, an economic and a business perspective.}, language = {en} } @misc{HerzHefenbrockLorenzetal.2024, author = {Herz, Jonas and Hefenbrock, Sophia and Lorenz, Katharina and Muscat, Dirk and Str{\"u}bbe, Nicole}, title = {Polyketone-Polypropylene Core-Shell Fibers for Concrete Reinforcement}, series = {Proceedings of the 39th International Conference of the Polymer Processing Society (PPS-39)}, journal = {Proceedings of the 39th International Conference of the Polymer Processing Society (PPS-39)}, editor = {Ediciones Uniandes,}, doi = {10.51573/Andes.PPS39.GS.FF.1}, pages = {167 -- 177}, year = {2024}, abstract = {Corrosion of the commonly used steel reinforcements weakens the structural strength of concrete. To oppose this issue, concrete reinforcements in the form of polymer fibers are investigated. These polymer fibers need a good bonding ability to concrete and good mechanical properties. This study investigates core-shell fibers produced from polyketone and polypropylene mixed with a compatibilizer. The core-shell fibers were produced by coextrusion and drawing. The fibers were analyzed by tensile tests, a single fiber pull-out test, contact angle measurements, scanning electron microscopy and thermogravimetric analysis.}, language = {en} } @misc{KreyZenzWideraetal.2024, author = {Krey, Adrian and Zenz, Vitus and Widera, Karolin and List, Manuela and Muscat, Dirk and Str{\"u}bbe, Nicole}, title = {Reactive Extrusion of Lignocellulosic Biomass to Produce Biopolymer Monomers using High-Energy Radiation and Catalytic Acids}, series = {Proceedings of the 39th International Conference of the Polymer Processing Society (PPS-39)}, journal = {Proceedings of the 39th International Conference of the Polymer Processing Society (PPS-39)}, editor = {Ediciones Uniandes,}, doi = {https://doi.org/10.51573/Andes.PPS39.SS.BBB.6}, pages = {329 -- 337}, year = {2024}, abstract = {The increasing prevalence of bio-based and biodegradable plastics as an alternative to traditional plastics derived from crude oil is a noteworthy trend. Polybutylene succinate (PBS), a plastic produced from succinic acid, is among the promising materials for the future. However, the production of bio-based succinic acid through biotechnical processes in controlled environments presents challenges. This process leads to increased costs and is currently not economically competitive compared to crude oil-based succinic acid production. In addition to succinic acid, levulinic acid is another monomer produced in the same process. A novel approach to the digestion of biomass has been developed to address the issue of biotechnological production of bio-based platform chemicals. This innovative process employs microwave radiation, pressure, and temperature to convert wood residues into succinic acid and levulinic acid. Various catalyst concentrations and biomass ratios were tested in a batch process, with high-pressure liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC/MS) analyses revealing the formation of succinic acid, levulinic acid, formic acid, and 2 oxoglutaric acid. The results demonstrate that microwaves combined with a metal salt catalyst can be used to produce platform chemicals from lignocellulosic biomass. To further advance the continuous production of PBS, a twin-screw extruder was modified and adapted after the successful results obtained from the batch processes. This setup enables additional experiments to evaluate the transferability of batch process results to continuous reactions, facilitating the scale-up and economic viability of the overall PBS production process in the future.}, language = {en} } @article{HerzSchusserMuscatetal.2025, author = {Herz, Jonas and Schusser, Verena and Muscat, Dirk and Str{\"u}bbe, Nicole}, title = {Cold-Drawn Wood-Filled Polybutylene Succinate Macro-Fibers as a Reinforcing Material for Concrete}, series = {Polymers}, volume = {17}, journal = {Polymers}, number = {3}, publisher = {MDPI}, address = {Basel}, doi = {https://doi.org/10.3390/polym17030403}, pages = {21}, year = {2025}, abstract = {The corrosive behavior of steel reinforcements causes issues in the concrete industry. To overcome this issue, alternative noncorrosive reinforcements such as polymer fibers could be used. However, as environmental protection becomes more important, sustainability must also be considered in the solution. An alternative to polymers based on raw oil is bio-based polymers. This study investigates the suitability of polymer fibers produced from polybutylene succinate together with cellulose and wood fillers as concrete reinforcements. Different mixtures of polybutylene succinate, cellulose, and wood fillers were created, and fibers were produced using a multiple drawing process. The fibers were tested using tensile tests, a single-fiber pull-out test, contact angle measurements, reflected light microscopy, density measurements, and thermogravimetric analysis. The fillers were shown to decrease the mechanical properties as the particle size and filler amount increased, resulting in a reduction in Young's modulus and tensile strength of 55\% and 70\%, respectively, while adhesion to concrete increased with particle size from 0.31 ± 0.02 N/mm2 without filler to 0.90 ± 0.10 N/mm2 for the best-performing material combination. Reflected light microscopy images show changes in the fiber surface before and after pull-out. The fiber density decreased from 1.26 ± 0.05 g/cm3 to 0.91 ± 0.04 g/cm3 with an increasing filler amount and particle size for a compound with 10 weight percent of wood filler 1. The fiber thermal stability decreased slightly with the addition of filler. The greatest effect was a reduction in the temperature to ≈58 °C at 1\% weight loss when 10 weight percent of wood was added. This study proves the possibility of using bio-based materials as concrete reinforcements.}, language = {en} } @misc{DoerrGergenMueller2024, author = {D{\"o}rr, Madeleine and Gergen, Andrea and M{\"u}ller, Florian}, title = {Collaborative learning by peer mentoring in digital collaboration spaces. On the use of digital tools in university didactics}, series = {EAPRIL 2024 in Hasselt, Belgium}, journal = {EAPRIL 2024 in Hasselt, Belgium}, year = {2024}, language = {en} } @misc{PhilippJacobRobertetal.2020, author = {Philipp, Patrick and Jacob, Ruben and Robert, Sebastian and Beyerer, Jurgen}, title = {Predictive Analysis of Business Processes Using Neural Networks with Attention Mechanism}, series = {2020 International Conference on Artificial Intelligence in Information and Communication (ICAIIC)}, journal = {2020 International Conference on Artificial Intelligence in Information and Communication (ICAIIC)}, publisher = {IEEE}, doi = {10.1109/ICAIIC48513.2020.9065057}, pages = {225 -- 230}, year = {2020}, abstract = {The analysis of ongoing processes is an important task in business process management. This is not surprising, since (e.g.) being able to predict future events in processes enables companies to intervene at an early stage if deviations from a desired workflow are likely to occur. Subsequently, errors and associated financial losses can be prevented or avoided. A common basis for being able to predict future events is a sequence of previous events that are typically stored in a socalled event log. In this work we present a neural network with attention mechanism, which is trained using publicly available event logs (e.g. BPI Challenge 2013). Furthermore, we elaborate the proposed model with an extensive dataset of events of a worldwide known German software company. In addition to promising results (e.g.) with regard to n-gram models, the training time of the proposed model is shorter than that of typical reference models such as neural networks with a long short-term memory architecture (LSTM).}, language = {en} } @inproceedings{Fettke2023, author = {Fettke, Ulrike}, title = {How to qualitative interviews when social desirability is high.}, series = {Round Table Discussion at the World Conference on Qualitative Research (WCQR), Algarve (Portugal), 26.1.2023}, booktitle = {Round Table Discussion at the World Conference on Qualitative Research (WCQR), Algarve (Portugal), 26.1.2023}, year = {2023}, language = {en} } @misc{FettkeWackerWacker2024, author = {Fettke, Ulrike and Wacker, Mona and Wacker, Elisabeth}, title = {Measuring social diversity on the housing market? A discussion of findings from a qualitative Delphi survey.}, series = {WCQR2023 Abstracts Book : 7th World Conference on Qualitative Research}, journal = {WCQR2023 Abstracts Book : 7th World Conference on Qualitative Research}, pages = {57}, year = {2024}, language = {en} } @inproceedings{FettkeFerschlWacker2023, author = {Fettke, Ulrike and Ferschl, Susanne and Wacker, Elisabeth}, title = {Developing sustainable solutions at intersections: for community health and well-being}, series = {SMUS India Conference: Book of Abstracts: 3rd International and Interdisciplinary Conference on Spatial Methods for Urban Sustainability Conference}, booktitle = {SMUS India Conference: Book of Abstracts: 3rd International and Interdisciplinary Conference on Spatial Methods for Urban Sustainability Conference}, pages = {332}, year = {2023}, language = {en} } @incollection{WackerShauriMaghendaetal.2023, author = {Wacker, Elisabeth and Shauri, Halimu and Maghenda, Marianne and Ferschl, Susanne and Fettke, Ulrike}, title = {Summer School One Health and the role of water. An African-European School. Final report.}, publisher = {VolksWagen Stiftung 2023}, address = {Hannover}, doi = {10.13140/RG.2.2.20120.26887/1}, publisher = {Technische Hochschule Rosenheim}, pages = {37}, year = {2023}, language = {en} } @incollection{FettkeWacker2023, author = {Fettke, Ulrike and Wacker, Elisabeth}, title = {Living in contexts. Transforming Housing Vacancies as a Driving Concept for Inclusive Cities.}, series = {In Camprag, Nebosja, Lauren Uğur, Lauren, Suri, Anshika (Hrsg): Rethinking Urban Transformations. A New Paradigm for Inclusive Cities.}, booktitle = {In Camprag, Nebosja, Lauren Uğur, Lauren, Suri, Anshika (Hrsg): Rethinking Urban Transformations. A New Paradigm for Inclusive Cities.}, publisher = {Springer}, address = {Wiesbaden}, doi = {10.1007/978-3-031-37224-7_4}, publisher = {Technische Hochschule Rosenheim}, pages = {55 -- 73}, year = {2023}, language = {en} } @misc{FettkeBergmannWacker2023, author = {Fettke, Ulrike and Bergmann, Mona and Wacker, Elisabeth}, title = {Measuring social diversity on the housing market? A discussion of findings from a qualitative Delphi survey}, series = {WCQR 7th World Conference on Qualitative Research - Abstracts Book}, journal = {WCQR 7th World Conference on Qualitative Research - Abstracts Book}, pages = {57}, year = {2023}, language = {en} } @misc{FleischmannIvensKrishnamachari2020, author = {Fleischmann, Martin and Ivens, Bj{\"o}rn S. and Krishnamachari, Bhaskar}, title = {Blockchain Technology as a Means for Brand Trust Repair - Empirical Evidence from a Digital Transgression}, series = {Proceedings of the 53rd Hawaii International Conference on System Sciences, Wailea, HI, USA}, journal = {Proceedings of the 53rd Hawaii International Conference on System Sciences, Wailea, HI, USA}, pages = {5318 -- 5327}, year = {2020}, language = {en} } @article{EisingerichMacInnisFleischmann2021, author = {Eisingerich, Andreas B. and MacInnis, Deborah J. and Fleischmann, Martin}, title = {Moving Beyond Trust: Making Customers Trust, Love, and Respect a Brand}, series = {MIT Sloan Management Review}, volume = {2021}, journal = {MIT Sloan Management Review}, year = {2021}, language = {en} } @misc{FleischmannIvens2019, author = {Fleischmann, Martin and Ivens, Bj{\"o}rn S.}, title = {Exploring the Role of Trust in Blockchain Adoption: An Inductive Approach}, series = {Proceedings of the 52nd Hawaii International Conference on System Sciences, Wailea, HI, USA}, journal = {Proceedings of the 52nd Hawaii International Conference on System Sciences, Wailea, HI, USA}, pages = {6845 -- 6854}, year = {2019}, language = {en} } @inproceedings{FettkeKastlOestreichetal.2023, author = {Fettke, Ulrike and Kastl, Andrea and Oestreich, Claudia and B{\"o}hm, Janna and Rauner, Yvonne and Ittlinger, Sabine}, title = {Live independently at home for as long as possible. Digital assistance systems as a decisive factor. Transformative Change in the Contested Fields of Housing and Care.}, series = {Transformative Change in the Contested Fields of Housing and Care. Conference book.}, booktitle = {Transformative Change in the Contested Fields of Housing and Care. Conference book.}, doi = {10.13140/RG.2.2.35834.09923}, year = {2023}, language = {en} } @article{BergmannFettke2023, author = {Bergmann, Mona and Fettke, Ulrike}, title = {Organizing for Education. A Munich Case Study on (female) migrant engagement in the 1970ies and 1980ies.}, series = {Zeitschrift f{\"u}r erziehungswissenschaftliche Migrationsforschung}, journal = {Zeitschrift f{\"u}r erziehungswissenschaftliche Migrationsforschung}, number = {2 (2)}, doi = {10.3224/zem.v2i2.05}, year = {2023}, language = {en} } @article{BergmannUlrikeWacker2024, author = {Bergmann, Mona and Ulrike, Fettke and Wacker, Elisabeth}, title = {Opening doors to affordable rental housing. Perspectives of private suburban owners with unused housing space}, series = {Urban Planning}, volume = {9}, journal = {Urban Planning}, doi = {10.17645/up.8595}, pages = {18}, year = {2024}, language = {en} } @article{KastlRaunerMayerHuberetal.2024, author = {Kastl, Andrea and Rauner, Yvonne and Mayer-Huber, Sandra and Oestreich, Claudia and Benstetter, Franz and Fettke, Ulrike}, title = {Stakeholder needs assessment for developing ageing in place solutions - a qualitative study}, series = {BMC Geriatrics}, journal = {BMC Geriatrics}, number = {24:104}, doi = {10.1186/s12877-024-04722-x}, pages = {12}, year = {2024}, language = {en} } @inproceedings{FettkeKastlIttlinger2024, author = {Fettke, Ulrike and Kastl, Andrea and Ittlinger, Sabine}, title = {Independent Housing in your own home. Understanding what people want after a clinical rehabilitation stay}, series = {Imaginaries and Strategies for Good Care and Good Housing in Times of Transformation. Wien, 23. \& 24. Mai 2024}, booktitle = {Imaginaries and Strategies for Good Care and Good Housing in Times of Transformation. Wien, 23. \& 24. Mai 2024}, year = {2024}, language = {en} } @misc{FettkeKastlDoeringeretal.2024, author = {Fettke, Ulrike and Kastl, Andrea and D{\"o}ringer, Tobias and Rauner, Yvonne and Ittlinger, Sabine}, title = {Digital Assistance vs. Ideas of a Good Home?! A clash uncovered within a research design of day visits}, series = {Ageing \& Social Change. Asynchronous presentation. Galway (Irland), 18.09.2024-20.09.2024.}, journal = {Ageing \& Social Change. Asynchronous presentation. Galway (Irland), 18.09.2024-20.09.2024.}, doi = {10.13140/RG.2.2.20422.89928}, pages = {10}, year = {2024}, language = {en} }