@book{OPUS4-7027, title = {Hybrid urbanisms in secondary cities of the global south : insights from urban planning and infrastructure delivery in Ghana and Peru}, editor = {Rosen, Christian and Gribat, Nina}, publisher = {Routledge}, address = {London}, isbn = {978-1-003-51113-7}, doi = {10.4324/9781003511137}, publisher = {BTU Cottbus - Senftenberg}, pages = {194}, year = {2025}, abstract = {This book presents the concept of Hybrid Urbanisms aiming to deconstruct the still-existing and often critiqued dualism of formalised and informalised practices in urban planning and infrastructure delivery. Using an innovative perspective, the book addresses this issue by focusing on the complex configurations in which both forms always co-exist and compete as powerful social constructs. It unveils the juxtaposition, simultaneity, dependency and intertwining of in-/formalised practices and highlights the relevance of this perspective to better understand urban development, especially in the global South. At the same time, the book focuses on secondary cities of Ghana and Peru that are often overlooked in the existing literature but play a relevant role in global urbanisation quantitively and qualitatively. In offering a comparative perspective on two very diverse geographical contexts, ten empirical studies are framed by a conceptualisation of 'Hybrid Urbanisms' and a concluding systematisation of perspectives on this central aspect of urban development. Taken together, this volume makes an innovative contribution on how to produce new and more diverse urban theories of cities of the global South. This book is essential for scholars, students and practitioners in the fields of urban planning, urban studies, infrastructure studies and international cooperation alike. In addition, it will be of interest to those in the fields of urban sociology, public policy, urban geography and development studies. This publication was supported by funds from the Publication Fund for Open-Access Monographs of the Federal State of Brandenburg, Germany and by the Faculty of Architecture, Civil Engineering and Urban Planning of Brandenburg University of Technology Cottbus-Senftenberg.}, subject = {Geography; Global development; Urban studies}, language = {en} } @phdthesis{GhomsiWabo2025, author = {Ghomsi Wabo, Samuel}, title = {Aktivierung stickstoffmodifizierter Kohlenstoffmaterialien mit KOH : Untersuchungen zum Porenbildungsprozess sowie zum Stickstoffaustrag}, doi = {10.26127/BTUOpen-7260}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72602}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {In dieser Arbeit wurden der Aktivierungsprozess und der Stickstoffaustrag w{\"a}hrend der KOH-Aktivierung stickstoffmodifizierter Kohlenstoffmaterialien untersucht, um die spezifischen und synergistischen Beitr{\"a}ge von Stickstoff und KOH zur Porosit{\"a}tsbildung in diesen Materialien zu kl{\"a}ren. Hierf{\"u}r wurden geeignete Referenzsysteme aus verschiedenen Kohlenstoffquellen (Cellulose und Phenolharz) hergestellt, bei denen Syntheseparameter wie der Harnstoffgehalt, die KOH-Konzentration und die Karbonisierungstemperatur systematisch variiert wurden. Es wurde festgestellt, dass eine Erh{\"o}hung des Harnstoffgehalts in der Synthesemischung zu einem h{\"o}heren Stickstoffgehalt in den Charcoals f{\"u}hrt - ein Effekt, der bei cellulosebasierten Materialien ausgepr{\"a}gter ist. Die KOH-Aktivierung f{\"u}hrte, unabh{\"a}ngig von der verwendeten Kohlenstoffquelle, zu einem erheblichen Stickstoffaustrag. Bei hohen KOH-Konzentrationen (> 10 M) war kein Stickstoff mehr im Material nachweisbar, was eng mit der Bildung einer ausgepr{\"a}gten Porosit{\"a}t zusammenh{\"a}ngt. Allerdings zeigte sich, dass der Gewinn an Porenvolumen durch den Austrag stickstoffhaltiger Spezies relativ gering ist. Stickstoff wirkt haupts{\"a}chlich als Katalysator f{\"u}r Redoxreaktionen zwischen KOH bzw. dessen Zersetzungsprodukten und Kohlenstoff, indem er die Bildung von K₂CO₃ beg{\"u}nstigt. Diese Kaliumspezies k{\"o}nnen die graphitische Struktur des Materials zerst{\"o}ren und zus{\"a}tzliche chemische Prozesse unterst{\"u}tzen, was zu einer intensiveren Aktivierung f{\"u}hrt. Die Bildung von K₂CO₃ ist stark vom Stickstoffgehalt abh{\"a}ngig und wurde ausschließlich bei Kohlenstoffen beobachtet, die mit einer Kombination aus hoher KOH-Konzentration und hohem Stickstoffgehalt hergestellt wurden. Im Gegensatz dazu f{\"u}hrte eine Kombination aus hoher KOH-Konzentration und niedrigem Stickstoffgehalt nicht zur Bildung von K₂CO₃, was darauf hinweist, dass die chemischen Wechselwirkungen des Kaliums in diesem Szenario eine untergeordnete Rolle bei der Porosit{\"a}tsbildung spielen. In solchen F{\"a}llen erfolgt die Aktivierung des Materials prim{\"a}r {\"u}ber Redoxreaktionen, bei denen Kohlenmonoxid (CO) und Kohlendioxid (CO₂) als Reaktionsprodukte entstehen. Diese Redoxreaktionen bewirken eine Umstrukturierung des Materials, jedoch ohne eine signifikante Ver{\"a}nderung der graphitischen Struktur durch Kaliumspezies. Anderseits ist die hohe KOH-Konzentration entscheidend f{\"u}r die Bereitstellung von Kaliumverbindungen, die gezielt in die Schichtstruktur des Materials eindringen und diese effektiv aufbrechen.}, subject = {KOH-Aktivierung; Stickstoffmodifizierte Kohlenstoffen; Por{\"o}se Kohlenstoffe; Porenbildung; Katalytischer Effekt von Stickstoff; Porous carbons; Nitrogen-modified carbons; KOH activation; Pore formation; Catalytic effect of nitrogen; Kohlenstoffwerkstoff; Stickstoffverbindungen; Por{\"o}ser Stoff; Aktivierung ; Kaliumhydroxid}, language = {de} } @phdthesis{Nghinaunye2025, author = {Nghinaunye, Teopolina}, title = {Investigation into the potential of 𝘈𝘳𝘵𝘩𝘳𝘰𝘴𝘱𝘪𝘳𝘢 𝘱𝘭𝘢𝘵𝘦𝘯𝘴𝘪𝘴 as a source for anticancer compounds}, doi = {10.26127/BTUOpen-7249}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72493}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Hepatozellul{\"a}res Karzinom (HCC) erfordert sicherere und wirksamere Behandlungsoptionen. In dieser Studie wurde die Zytotoxizit{\"a}t eines w{\"a}ssrigen Extrakts von Arthrospira platensis (AP), der unter optimierten Bedingungen kultiviert wurde, an humanen Upcyte-Hepatozyten aus kanzer{\"o}sem und nicht-kanzer{\"o}sem Gewebe untersucht. AP zeigte einen konzentrationsabh{\"a}ngigen zytotoxischen Effekt, der gezielt die Krebszellen angriff, w{\"a}hrend nicht-kanzer{\"o}se Zellen weniger beeintr{\"a}chtigt wurden. Dies deutet auf ein selektives Antikrebspotenzial hin. Der hohe Gehalt an bioaktiven Verbindungen wie Phycocyanin k{\"o}nnte zu diesem Effekt beitragen. Die Ergebnisse st{\"u}tzen die Einsch{\"a}tzung, dass AP eine vielversprechende Quelle f{\"u}r nat{\"u}rliche Antikrebsverbindungen darstellt.}, subject = {Antikrebsverbindungen; Arthrospira platensis; Hepatozellul{\"a}res Karzinom; Optimierte Kulturbedingungen; Upcyte humane Hepatozyten; Anticancer compounds; Hepatocellular carcinoma; Optimized culture conditions; Upcyte human hepatocytes; Krebsforschung; Leberzellkrebs; Spirulina platensis; Cytotoxizit{\"a}t}, language = {en} } @phdthesis{Popiela2025, author = {Popiela, Bartosz Maciej}, title = {Einfluss fertigungsbedingter Eigenspannungen auf die Betriebssicherheit von nassgewickelten Composite-Druckbeh{\"a}ltern mit einem nichttragenden Liner}, doi = {10.26127/BTUOpen-7238}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72383}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Im Hinblick auf die globale Herausforderung der Energietransformation steigt der Bedarf an M{\"o}glichkeiten zur Energiespeicherung. Eine Technologie, die zunehmend in den Fokus r{\"u}ckt, ist die Energiespeicherung mittels komprimiertem Wasserstoffgas. Insbesondere f{\"u}r mobile und Transport-Anwendungen ist eine geringe Masse des Speichers vorteilhaft, weshalb vollumwickelte Composite-Druckbeh{\"a}lter des Typs 4 zum Einsatz kommen. Diese werden {\"u}berwiegend im Nasswickelverfahren gefertigt, das durch zahlreiche Prozessparameter und physikalische Effekte charakterisiert wird. Die Wahl der Wickelprozessparameter sowie Schwankungen der Materialkennwerte beeinflussen den Eigenspannungszustand in der Composite-Struktur eines Druckbeh{\"a}lters. Somit wirken sie sich auch auf den Spannungszustand im Betrieb aus. Die vorliegende Dissertation beinhaltet Untersuchungen des Einflusses von fertigungsbedingten Eigenspannungen auf die Sicherheit von Composite-Druckbeh{\"a}ltern mit nichttragendem Kunststoff-Liner. Ziel ist es, das mechanische Verhalten von Composite-Druckbeh{\"a}ltern besser zu verstehen und deren Sicherheitsniveau sowie Konkurrenzf{\"a}higkeit weiter zu steigern. Schwerpunkte der Arbeit sind experimentelle Untersuchungen der Eigenspannungsentstehung und -entwicklung sowie deren Einfluss auf die Beh{\"a}lter-Sicherheit. Im Fokus befindet sich die Exploration von M{\"o}glichkeiten zur Verbesserung der Zuverl{\"a}ssigkeit der Beh{\"a}lter durch Variation der Fertigungsparameter und eine Konditionierung nach der Fertigung. Der Eigenspannungszustand wird in numerischen Simulationen sowie mit dem zerst{\"o}renden Bohrlochverfahren charakterisiert. Die {\"U}berwachung der Spannungsumlagerung w{\"a}hrend einer Konditionierung unter Zeitstandbelastung erfolgt mit eingebetteten faseroptischen Sensoren, die sp{\"a}ter zur Dehnungsmessung in zerst{\"o}renden, langsamen Berstpr{\"u}fungen eingesetzt werden. Zur Vertiefung des Verst{\"a}ndnisses des Versagensverhaltens der verwendeten 6,8 l-Druckbeh{\"a}lter wird die Finite-Elemente-Methode eingesetzt. Dar{\"u}ber hinaus werden Qualit{\"a}tsuntersuchungen der Composite-Struktur mittels Mikro-Computertomographie und Impuls-Echo-Verfahren beschrieben. Die Ergebnisse der Untersuchungen zeigen, dass eine Steigerung der Zuverl{\"a}ssigkeit durch eine gezielte Innendruckbeanspruchung der gewickelten Beh{\"a}lter nahezu kostenneutral m{\"o}glich ist. Dies wird im Rahmen der Arbeit anhand eines Baumusters demonstriert. Dar{\"u}ber hinaus wird die Verbesserung der Zuverl{\"a}ssigkeit der Beh{\"a}lter im Rahmen einer Konditionierung unter Zeitstandbelastung vertieft diskutiert. Diese stellt eine weiterf{\"u}hrende M{\"o}glichkeit dar, das Beh{\"a}lterverhalten positiv zu beeinflussen und das Sicherheitsniveau zu steigern.}, subject = {Composite; Druckbeh{\"a}lter; Eigenspannungen; Faser-Kunststoff-Verbund; Wasserstoff; Composite material; Pressure vessel; Residual stress; Hydrogen; Fibre reinforced plastic; Energiespeicherung; Druckbeh{\"a}lter; Faserverst{\"a}rkter Kunststoff; Nasswickelverfahren; Eigenspannung}, language = {de} } @phdthesis{Afitiri2025, author = {Afitiri, Abdul-Rahaman}, title = {Development of a solar water disinfection treatment system for sustainable water use in developing countries}, doi = {10.26127/BTUOpen-7247}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72471}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Direct dependence on surface water poses a threat to human health when consumed without treatment. While solar water disinfection treatment systems (SODIS) help improve the quality of surface water for rural households, SODIS approaches, implementation, and adoption have some limitations. Consequently, this study developed a hybrid water disinfection treatment system at the laboratory scale, integrating novel Advanced Oxidation Processes (AOP). Additionally, surface water quality, the challenges, and enablers of effective implementation of SODIS in rural Ghana were assessed. Two hybrid disinfection systems in continuous flow with reactor volumes of 300 ml each were operated. The disinfection of Staphylococcus aureus in the hybrid disinfection system achieved a 99.60\% reduction at 360 min, while complete disinfection (100\%) was achieved with photocatalyst integration without regrowth after post-treatment storage for 24 hr. A proportionate 96.24\% disinfection rate was achieved for Salmonella senftenberg within 360 min in the hybrid disinfection system while 100\% disinfection was achieved with the integration of a photocatalyst. Similarly, no regrowth of Salmonella senftenberg was observed after 24 hr post-treatment storage. The disinfection of Bacillus subtilis was optimized from 95.46\% in the hybrid treatment system to 99.99\% in the hybrid system with photocatalyst within 360 min. Furthermore, a disinfection proportion of 99.97\% was achieved in the hybrid system at 360 min, while 100\% disinfection was achieved with the hybrid disinfection system at 300 min for Escherichia coli with the integration of photocatalyst. No Escherichia coli re-growth was observed after a 24 hr post treatment storage. The water quality index generated based on the surface water quality assessment showed that all surface water sources are polluted largely due to total and faecal coliforms. The results proved that SODIS can serve as a suitable water treatment approach for adoption in the Sawla-Tuna-Kalba (STK) District. Out of 1155 respondents, 97\% of the respondents are willing to accept and adopt a SODIS. Based on the findings, the enablers of effective SODIS implementation were willingness to pay for SODIS, household and community participation, and willingness to use water from SODIS. The identified barriers to the implementation of SODIS were environmental, technological, political and legal, and economic barriers. Compositional and contextual factors such as age, marital status, education, religion, and geographical location significantly mediate and attenuate households' willingness to accept and adopt SODIS in the STK District of Ghana.}, subject = {Water disinfection; Optimization; Photocatalyst; Solar water disinfection treatment systems; Willingness to accept; Wasserdesinfektion; Optimierung; Photokatalysator; SODIS; Bereitschaft zur Annahme; Region Savannah; Solartechnik; Desinfektion; Oberfl{\"a}chenwasser; Photokatalysator}, language = {en} } @misc{OPUS4-7096, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2026,01 (09.01.2026)}, doi = {10.26127/BTUOpen-7096}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70963}, year = {2026}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Angewandte Naturwissenschaften B.Sc. vom 08. Januar 2026}, language = {de} } @article{MathiazhaganKimVeginietal.2025, author = {Mathiazhagan, Akilan and Kim, Dongsuk and Vegini, George and Montemurro, Marco and Baltag, Serghei and Asli, Majid and H{\"o}schler, Klaus}, title = {Design strategies for enhancement of mechanical behaviour of hybrid cellular structures based on schwarz primitive geometry}, series = {Materials \& Design}, volume = {240}, journal = {Materials \& Design}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0264-1275}, doi = {10.1016/j.matdes.2025.115161}, year = {2025}, abstract = {Hybrid cellular structures are gaining attention for their multi-functionality in load-bearing, heat-transfer, and energy-absorption applications. Schwarz Primitive (SCP)-based geometries, a subclass of Triply Periodic Minimal Surfaces (TPMS), with their high surface area, tunable properties, and continuous topology, provide strong potential for such applications. To further enhance mechanical performance and stability, this work conducts a thorough investigation of hybrid designs that integrate SCP TPMS with Kelvin truss-based geometries, combining the high connectivity of TPMS with the reinforcement and directional stiffness benefits of struts. A theoretical strain-based homogenization framework was implemented over a design matrix that independently varies the relative densities of the SCP and the truss geometries, quantifying how each constituent proportion influences the overall mechanical response of the hybrid. These predictions were corroborated by finite element analyses in ANSYS 2023 and by mechanical testing of 3D-printed polylactic acid samples, providing independent validation of homogenization trends across orientations. The resulting formulation enables rapid property mapping, sensitivity analysis, and optimization of SCP-Kelvin hybrids, thereby reducing the prototyping effort while guiding application-based design selection and customization.}, subject = {Lightweight design; Anisotropy control; Homogenization; Triply periodic minimal surfaces; Periodic open cellular structures}, language = {en} } @techreport{HackenbergWeidnerLangetal.2025, type = {Working Paper}, author = {Hackenberg, Sinah and Weidner, Silke and Lang, Christian and Lange, Mara and Prokesova, Laura and Reinhardt, Annsophie and Rudolph, Marie and Schneider, Anne-Kathrin and Schneider, Emilia and Siemeister, Frederik and Stix, Charlotte and Strom, Johannes and Tauber, Eric and Murimets, Natalia}, title = {Manifest f{\"u}r einen offenen Campus}, issn = {2941-7406}, doi = {10.26127/BTUOpen-7200}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72004}, year = {2025}, abstract = {Der Campus der BTU Cottbus-Senftenberg und die Stadt Cottbus stehen in einem wechselseitigen, potenzialreichen Verh{\"a}ltnis zueinander: W{\"a}hrend die Universit{\"a}t kontinuierlich Impulse f{\"u}r Wissen, Innovation und kulturelle Vielfalt gibt, bietet Cottbus mit seinem historischen, sozialen und r{\"a}umlichen Gef{\"u}ge einen inspirierenden Kontext f{\"u}r Lehre, Forschung und st{\"a}dtisches Leben. Dennoch ist der Campus r{\"a}umlich wie funktional vom Stadtkern getrennt. Neben physischen Barrieren erschweren auch mentale Hemmschwellen und eine geringe Nutzungsvielfalt seine Integration in den {\"o}ffentlichen Raum. Im Seminar „Beteiligungsprozesse in Stadt- und Regionalplanung" untersuchten Studierende daher, wie r{\"a}umliche, programmatische und soziale „Trittsteine" geschaffen werden k{\"o}nnen, um den Campus st{\"a}rker mit dem st{\"a}dtischen Alltag zu verkn{\"u}pfen. Ausgangspunkt war eine Analyse informeller Beteiligungsverfahren, aus der ein „Katalog der Beteiligung" als methodischer Werkzeugkasten hervorging. Darauf aufbauend realisierten die Studierenden zwei konkrete Formate: eine Zukunftswerkstatt mit {\"u}ber f{\"u}nfzig Teilnehmenden sowie einen Stadtspaziergang, der den Campus als Teil des {\"o}ffentlichen Raums erfahrbar machte. Die Ergebnisse wurden in einer Ausstellung pr{\"a}sentiert und in einem Manifest zusammengef{\"u}hrt, das konkrete Handlungsempfehlungen an die Stadt Cottbus und die BTU formuliert. Ziel ist es, den Campus als offenen, urbanen Freiraum f{\"u}r alle Stadtbewohner:innen zu verankern und die Trennung zwischen Universit{\"a}t und Stadt nachhaltig zu {\"u}berwinden.}, subject = {Offener Campus; Stadtentwicklung; Stadtmanagement; Campus f{\"u}r alle; Stadt als Campus; Citydevelopment; Citymanagement; University; Urban campus; Participation; Cottbus; Campus; Stadtteilplanung; Strategisches Management; B{\"u}rgerbeteiligung; {\"O}ffentlicher Raum; Freifl{\"a}che; Stadtgr{\"u}n; Biodiversit{\"a}t; Barrierefreiheit}, language = {de} } @techreport{NowakowskiWiechers2025, type = {Working Paper}, author = {Nowakowski, Jan and Wiechers, Henk}, title = {Leitstrategien nachhaltiger Mobilit{\"a}t im l{\"a}ndlichen Tourismus : Handlungsans{\"a}tze in der Lausitz am Beispiel des Spreewaldes und des Lausitzer Seenlandes}, issn = {2941-7406}, doi = {10.26127/BTUOpen-7177}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71775}, year = {2025}, abstract = {Das Working Paper untersucht Leitstrategien nachhaltiger Mobilit{\"a}t im l{\"a}ndlichen Tourismus am Beispiel der Lausitz, mit Fokus auf die Tourismusregionen Spreewald und Lausitzer Seenland. Grundlage ist das Konzept der drei Leitstrategien nachhaltiger Mobilit{\"a}t - Suffizienz (vermeiden), Konsistenz (verlagern) und Effizienz (verbessern) -, die als strategischer Rahmen f{\"u}r eine sozial-{\"o}kologische Mobilit{\"a}tswende etabliert sind. Eine systematische {\"U}bertragung auf die touristische Mobilit{\"a}t blieb bislang jedoch weitgehend unber{\"u}cksichtigt. Ziel der Untersuchung ist es, Handlungsans{\"a}tze nachhaltiger touristischer Mobilit{\"a}t in beiden Regionen zu identifizieren und den Leitstrategien zuzuordnen. Methodisch kombiniert das Working Paper eine qualitative Dokumentenanalyse von zw{\"o}lf tourismusbezogenen Konzeptpapieren mit drei leitfadengest{\"u}tzten Expert*inneninterviews. Die Analyse ergibt f{\"u}nf zentrale Handlungsans{\"a}tze: (1) Ausbau des {\"O}PNV, (2) Qualifizierung des Fahrradtourismus, (3) Antriebswende {\"u}ber E-Mobilit{\"a}t, (4) Besucher*innenlenkung sowie (5) G{\"a}stekarten mit kostenfreier Nutzung des {\"O}PNV. Die Ergebnisse zeigen, dass bestehende Handlungsans{\"a}tze vorrangig auf Optimierung (Effizienz) und Verlagerung (Konsistenz) setzen. Eine tiefgreifende Transformation touristischer Mobilit{\"a}t erfordert jedoch auch die Integration suffizienzorientierter Strategien. Nur die kombinierte Anwendung aller drei Leitstrategien bietet die M{\"o}glichkeit, die Herausforderungen nachhaltiger touristischer Mobilit{\"a}t in l{\"a}ndlichen R{\"a}umen umfassend zu bew{\"a}ltigen.}, subject = {Nachhaltige Mobilit{\"a}t; Tourismus; Nachhaltigkeitsstrategien; Spreewald; Lausitzer Seenland; Tourism; Sustainble mobility; Lusatian Lakeland; Spreewald; Lausitzer Seenland; Spreewald; Tourismus; Mobilit{\"a}t; Nachhaltigkeit}, language = {de} } @phdthesis{Shubhani2025, author = {Shubhani,}, title = {Greening the institutions : curatorial activism's impact on environmental awareness in South India}, doi = {10.26127/BTUOpen-7195}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71950}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {This practice-based PhD explores the pivotal role of curators in enhancing the relationship between audiences and environmental art projects, focusing on the transformative potential of curatorial activism in the unique cultural context of India. Employing the counterhegemonic strategy of the relational approach, this research examines curatorial activism across various institutional settings. Through a practice-based methodological design, this project evaluates the efficacy of cultural institutions to communicate environmental crises and climate science to the public. It aims to generate a rich, original inquiry by organising exhibitions and events collaborating with environmental activists, artists, and institutions. This thesis highlights the curator's role as a researcher, educator, and mediator, bridging the gap between environmental art activism and curatorial discourse. Critical analysis of audience engagement in curated events like 'Who will Speak: Me? You? Or Nobody?' (2022), 'Waking up to the Fierce Urgency' (2022), and 'Ink \& Ecology: Eco-stories for a Sustainable Future' (2023) vividly demonstrate the profound impact of combining relational strategies with curatorial practices. This research significantly contributes to curatorial discourse and environmental art theory by questioning how curatorial activism can enhance audience engagement and foster transformative impacts, inspiring curators to recognise the power of their roles in shaping public discourse. The conceptual framework draws on Maura Reilly's curatorial activism and the scholarly reflections of Jean-Paul Martinon and Irit Rogoff on curatorial knowledge events. The insights of activist artist Ravi Agarwal and cultural critic TJ Demos on contemporary Indian environmental art practices further inform this study, emphasising a move beyond aesthetic approaches to critical curating. By intersecting political ecology with curatorial activism, this research meticulously analyses curatorial strategies and their ethical responsibilities towards the environmental crisis. It identifies current trends, evaluates the impact of curated projects, and investigates the relationship between institutional frameworks and art activism. The study strongly asserts that in the Indian context, curatorial activism, enriched with cultural and regional nuances, cannot just emerge but also stand as a potent tool for advancing politicised and critical curatorial practices, underlining the urgency and importance of this research.}, subject = {Activist art; Audience engagement; Curatorial activism; Environmental art; Relational approach; Aktivistische Kunst; Publikumsbeteiligung; Kuratorischer Aktivismus; Umweltkunst; Relationaler Ansatz; Indien (S{\"u}d); Kunstverein; Kulturverein; Veranstaltung; Ausstellung; Kuratieren; Kunst; Politische {\"O}kologie; Publikum; Beteiligung}, language = {en} } @phdthesis{Lehniger2025, author = {Lehniger, Kai}, title = {Stack buffer overflow attacks and countermeasures with register windows on the example of Xtensa LX}, doi = {10.26127/BTUOpen-7226}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72262}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Stack buffer overflows are vulnerabilities that occur due to missing bounds checks when writing data into local buffers. These vulnerabilities have been exploited for decades and persist until today due to the usage of popular programming languages like C and C++, which allow arrays to be accessed without any checks. Over the years a wide variety of countermeasures was introduces, ranging from static analysis to various forms of runtime checks. Register windows are a hardware architecture feature that was developed for Reduced Instruction Set Computer (RISC) architectures to reduce the overhead for function calls and returns due to the necessary load and store instructions. With register windows, a processor is equipped with a large number of registers, but only a part, the register window, is visible to the program. With a function call, the register window moves to a new set of registers for the function to use. When the function returns, the register window moves back. The physical register set is used like a ring buffer and if it overflows, an exception interrupts the program execution to save the content of the overflown registers to the stack. Underflow exceptions on the other hand are responsible to restore the content when the control flow returns to a function that had its registers overflown. With return addresses, stack pointers, and function arguments being held in registers, often being targeted by stack buffer overflow attacks, the register window mechanism has a direct influence on these attacks and their countermeasures. This thesis investigates these influences using the Xtensa Lx architecture as an example, as it is used in the popular ESP32 microcontroller. In a first part, window overflows and underflows are used to craft stack buffer overflow based attacks, with a focus being Return-Oriented Programming (ROP). A second part investigates selected countermeasures, including canaries, XOR cookies, shadow stacks, and encryption. Here the focus is how these countermeasures can or need to be adjusted in order to be used with register windows or how register windows can be used to improve performance or security. A following chapter addresses specific aspects of the implementation of said countermeasures. All countermeasure implementations have been evaluated using Bristol/Embecosm Embedded Benchmark Suite (BEEBS), a collection of 80 benchmarks for embedded devices, to show their performance for a wide variety of use-cases. The presented results show the potential of register windows to implement very performant countermeasures against stack buffer overflow attacks.}, subject = {Buffer overflow; IT-security; Xtensa; Register window; Puffer{\"u}berl{\"a}ufe; Registerfenster; IT-Sicherheit; Gegenmaßnahmen; Angriffe ; Puffer{\"u}berlauf; Computersicherheit; Gegenmaßnahme}, language = {en} } @article{EltaherBreuss2025, author = {Eltaher, Mahmoud and Breuß, Michael}, title = {Deep learning for unsupervised 3D shape representation with superquadrics}, series = {AI}, volume = {6}, journal = {AI}, number = {12}, publisher = {MDPI}, address = {Lausanne}, issn = {2673-2688}, doi = {10.3390/ai6120317}, year = {2025}, abstract = {The representation of 3D shapes from point clouds remains a fundamental challenge in computer vision. A common approach decomposes 3D objects into interpretable geometric primitives, enabling compact, structured, and efficient representations. Building upon prior frameworks, this study introduces an enhanced unsupervised deep learning approach for 3D shape representation using superquadrics. The proposed framework fits a set of superquadric primitives to 3D objects through a fully integrated, differentiable pipeline that enables efficient optimization and parameter learning, directly extracting geometric structure from 3D point clouds without requiring ground-truth segmentation labels. This work introduces three key advancements that substantially improve representation quality, interpretability, and evaluation rigor: (1) A uniform sampling strategy that enhances training stability compared with random sampling used in earlier models; (2) An overlapping loss that penalizes intersections between primitives, reducing redundancy and improving reconstruction coherence; and (3) A novel evaluation framework comprising Primitive Accuracy, Structural Accuracy, and Overlapping Percentage metrics. This new metric design transitions from point-based to structure-aware assessment, enabling fairer and more interpretable comparison across primitive-based models. Comprehensive evaluations on benchmark 3D shape datasets demonstrate that the proposed modifications yield coherent, compact, and semantically consistent shape representations, establishing a robust foundation for interpretable and quantitative evaluation in primitive-based 3D reconstruction.}, subject = {3D shape representation; Superquadrics; Deep learning; Unsupervised learning; Point clouds; Geometric modeling}, language = {en} } @article{SchuetzReissMooretal.2025, author = {Sch{\"u}tz, Raphael and Reiss, Franzika and Moor, Irene and Kaman, Anna}, title = {Lonely children and adolescents are less healthy and report less social support : a study on the effect of loneliness on mental health and the moderating role of social support}, series = {BMC Public Health}, volume = {25}, journal = {BMC Public Health}, publisher = {Springer Nature}, address = {Heidelberg}, issn = {1471-2458}, doi = {10.1186/s12889-025-23247-5}, year = {2025}, abstract = {Loneliness among children and adolescents has been increasingly recognized as a public health issue, for example, because of its associations with mental health problems. Nevertheless, there is a lack of evidence regarding the links between loneliness and mental health and the potential buffering role of social support. Thus, this study aims to investigate the prevalence of loneliness among children and adolescents in Germany and its associations with mental health. Furthermore, we analyze whether social support is negatively correlated with loneliness and mental health problems and whether it acts as a moderator of the association between loneliness and mental health issues. This study analyzed data from the Health Behavior in School-aged Children (HBSC) survey in Germany in 2022, which included 6,475 students aged 11, 13, and 15 years (girls: 50,6\%, Mage = 13,4, SD = 1,7). Loneliness was measured via the University of California-Los Angeles Scale (UCLA) and a single-item measure. The mental health indicators included subjective health, life satisfaction, and multiple psychosomatic complaints. Social support from family, teachers, and classmates was assessed. Chi-square tests, t tests, logistic regressions, and moderation analyses were conducted. A total of 17.2\% of the students reported high levels of loneliness. Compared with boys, girls and gender diverse students reported higher rates of loneliness. High levels of loneliness were strongly linked to poorer subjective health (OR = 5.56, p <.001), lower life satisfaction (OR = 7.32, p <.001), and increased psychosomatic complaints (OR = 7.38, p <.001). High social support from family, teachers, and students was associated with reduced loneliness and better mental health outcomes. Teacher support in grades 7 and 9 buffered the effect of loneliness on multiple psychosomatic complaints. The findings highlight that loneliness is a prevalent phenomenon among children and adolescents and is strongly associated with mental health issues. Greater social support is linked to reduced loneliness and better mental health, so targeted interventions to promote social support in schools and families are needed to address loneliness. Future research should explore longitudinal relationships and further elucidate the mechanisms underlying these associations.}, subject = {Loneliness; Mental health; HBSC; Children; Adolescents}, language = {en} } @phdthesis{Mitseva2025, author = {Mitseva, Asya}, title = {State of affairs in online user privacy : assessing real-world user information leakages and designing effective and practical countermeasures}, doi = {10.26127/BTUOpen-7214}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72142}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The Tor network ensures confidentiality of user data over the Internet and hides the IP addresses and relationships between communication partners to avoid user profiling and censorship. However, Tor cannot hide the number, direction, and timing of transmitted packets. Two types of attackers - autonomous systems (AS) and malicious Tor nodes - can exploit this for sophisticated attacks, such as website fingerprinting (WFP) and end-to-end traffic correlation, or fingerprinting attacks revealing the Tor users' location. On the other hand, in case of a malicious first Tor node or a malicious AS on the path between the user and the Tor network, the scalability of prior WFP attacks remains questionable due to impractical assumptions. This dissertation aims to provide a more realistic assessment of the exposure of Tor users to passive deanonymization attacks from different perspectives. First, we conduct a comprehensive review of fundamental Border Gateway Protocol (BGP) threats. We present a methodology for evaluating existing BGP security proposals and provide an extensive and up-to-date survey of proposals intended to make BGP secure and methods for detecting and mitigating routing instabilities. Based on the identified research gaps and unresolved challenges, we analyze the current level of resilience of Tor and two alternative Tor path selection methods against malicious ASs. While we detect a notable increase in the Tor's resilience to BGP attacks over the years, when measured from a Tor user to its first Tor node, the resilience provided by the alternative path selection methods on the way back, i.e., from the first Tor node to a Tor user, has decreased notably compared to the resilience measured on the forward path for these methods. Moreover, these methods tend to select first Tor nodes in a predictable manner, resulting in the exposure of users' locations to Tor middle nodes. We also show novel attacks against a state-of-the-art method for measuring bandwidth capabilities of Tor nodes, allowing a low-bandwidth attacker to gain notably higher bandwidth estimates than theoretically defined. We propose a novel lightweight defense against malicious Tor nodes, performing WFP or end-to-end traffic correlation, that splits user traffic over multiple Tor paths. Our defense is fully implemented on the user side, reducing deployment costs and making it independent of the underlying anonymization network. We also propose a metric that is capable of quantifying the user's location leakage considering a malicious Tor middle node. This metric enables Tor users to avoid specific first Tor nodes by strategically selecting those from which their location cannot be revealed. Finally, we examine the real-world scalability of WFP, especially against Tor users who visit several pages of a single website consecutively. We propose both a novel WFP attack and efficient strategies for adapting existing methods to account for sequential visits of pages within a website.}, subject = {Tor network; Traffic analysis; Website fingerprinting; Website fingerprinting defenses; Datenverkehrsanalyse; Anonyme Kommunikation; Onion routing; Datenschutz im Internet; Border Gateway Protocol (BGP); Computersicherheit; Tor ; Border Gateway Protocol}, language = {en} } @article{AhmedStraub2025, author = {Ahmed, Naveed and Straub, Andrea}, title = {A practical approach for measuring Chemical Oxygen Demand (COD) of Fats, oils, and grease (FOG) using tween 80 in wastewater}, series = {ChemEngineering}, volume = {9}, journal = {ChemEngineering}, number = {6}, publisher = {MDPI}, address = {Lausanne}, issn = {2305-7084}, doi = {10.3390/chemengineering9060138}, year = {2025}, abstract = {This study aims to estimate the organic load of oily wastewater by using Chemical Oxygen Demand (COD) measurements, addressing the analytical challenges posed by the hydrophobic, nonpolar, and often emulsified nature of Fats, oil and grease (FOG). This study established a reproducible and practical methodology for measuring COD in wastewater containing FOG at a laboratory scale, utilizing the nonionic surfactant T80 as a solubilizing and emulsifying agent. Precise gravimetric methods were employed to measure the mass of T80 (indirectly from volume (100-1400 µL/L)) added, and its correlation with COD was established. A strong linear relationship (R2 = 0.993-0.998) between T80 concentration and COD confirmed its stability and suitability as a calibration standard. Experiments with sunflower (1-4 mL/L) and rapeseed oils (1-3 mL/L) showed that COD increased linearly with oil concentration and stabilized after prolonged mixing (96-120 h), indicating complete emulsification and micellar equilibrium. Even under T80 overdose conditions, COD retained linearity (R2 > 0.99), though absolute values were elevated due to excess surfactant oxidation. Temperature variation (5 and 20 °C) and mild heating of coconut fat (30-32 °C) showed no significant effect on COD reproducibility, indicating that mixing time and surfactant dosage are the dominant factors influencing measurement accuracy. Overall, the study establishes T80 as a reliable surfactant for solubilizing oily matrices, providing a consistent and repeatable approach for COD assessment of wastewater containing FOG. The proposed method offers a practical basis and a step towards environmental monitoring and process control in decentralized and industrial wastewater treatment systems.}, subject = {Chemical oxygen demand; Fat; Oil; Wastewater; Tween 80}, language = {en} } @inproceedings{OPUS4-7129, title = {Book of open problems : 11th workshop on graph classes, optimization, and width parameters (GROW 2024)}, editor = {Beisegel, Jesse and Scheffler, Robert and K{\"o}hler, Ekkehard}, doi = {10.26127/BTUOpen-7129}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71295}, year = {2025}, abstract = {The Workshop on Graph Classes, Optimization, and Width Parameters (GROW) series of workshops brings together experts in both theoretical and practical issues to design new strategies for dealing with intractable graph problems. Its 11th edition, GROW 2024, was hosted by the Brandenburg University of Technology, Faculty of Mathematics, Computer Science, Physics, Electrical Engineering and Information Technology, Cottbus, Germany, from September 9-12, 2024. This booklet contains descriptions of open problems presented at GROW 2024.}, subject = {Graph theory; Graph classes; Graph parameters; Graph algorithms; Graphenalgorithmen; Graphklassen; Graphparameter; Graphentheorie; Graphentheorie}, language = {en} } @misc{OPUS4-7095, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,35 (10.12.2025)}, doi = {10.26127/BTUOpen-7095}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70951}, year = {2025}, abstract = {1. Erste {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Micro- and Nanoelectronics (M.Sc.) vom 10. Dezember 2025 2. Lesefassung: Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Micro- and Nanoelectronics (M.Sc.) vom 15. M{\"a}rz 2024 (AMbl. 03/2024) i. d .F. der Ersten {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Micro- and Nanoelectronics (M.Sc.) vom 10. Dezember 2025}, language = {de} } @article{AssafoLangendoerfer2025, author = {Assafo, Maryam and Langend{\"o}rfer, Peter}, title = {Tool remaining useful life prediction using feature extraction and machine learning-based sensor fusion}, series = {Results in Engineering}, volume = {28}, journal = {Results in Engineering}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2590-1230}, doi = {10.1016/j.rineng.2025.107297}, year = {2025}, abstract = {Tool remaining useful life prediction (RUL) is a critical task for predictive maintenance in manufacturing. Common limitations of existing data-driven solutions include: 1) Dependence on tool wear labels which are intricate to obtain on shop floors. 2) High resource requirements, affecting applicability on resource-constrained Internet-of-things devices. 3) Heavy feature engineering. To address these limitations, we present a methodology aiming at accurately predicting RUL without using wear labels, while ensuring implementation efficiency and minimal feature engineering. It involves extracting time-domain features and multiscale features using maximal overlap discrete wavelet transform (MODWT) from three cutting-force sensor signals. Without undergoing any feature selection or dimensionality reduction, the features are fed to machine learning (ML) regression models where they are fused into an RUL decision. For this purpose, one-to-one and sequence-to-sequence regression using random forest (RF) and different long short-term memory (LSTM) networks were used, respectively. The 2010 PHM Data Challenge milling dataset was used for validation. The results highlighted the significant role of sensor fusion in reducing prediction errors and increasing the performance consistency over three test cutters, compared to single sensors. Global interpretations were provided using RF-based feature importance analysis. Our methodology was compared with six existing state-of-the-art works, including different end-to-end deep learning (DL) models using raw data as input, and works coupling heavy feature engineering with DL. The results showed that our methodology consistently outperformed all the comparative methods over the test cutters, despite using fewer sensors, which further proves its competitiveness and suitability in resource- and sensor-constrained environments.}, subject = {Cutting tool; Data-driven models; Feature extraction; Machine learning; Predictive maintenance}, language = {en} } @phdthesis{Holy2025, author = {Holy, Felix}, title = {Dynamische Simulationen und experimentelle Untersuchungen zur Entwicklung einer Hochtemperatur-Carnot-Batterie}, doi = {10.26127/BTUOpen-7202}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72020}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Die Energiewende erfordert flexible, effiziente und wirtschaftlich tragf{\"a}hige Speicherl{\"o}sungen, um den stetig wachsenden Anteil erneuerbarer Energien systemdienlich zu integrieren. Carnot-Batterien (CB) bieten hierf{\"u}r ein vielversprechendes Konzept zur sektoren{\"u}bergreifenden Speicherung elektrischer Energie in Form thermischer Energie mit anschließender R{\"u}ckverstromung. Insbesondere Hochtemperatur-Carnot-Batterien (HTCB) mit Speichertemperaturen {\"u}ber 1.000 °C zeichnen sich durch hohe Energiedichten, ein hohes exergetisches Potenzial und eine kosteng{\"u}nstige Systemarchitektur aus leicht verf{\"u}gbaren Speichermaterialien aus. Die vorliegende Arbeit widmet sich der Entwicklung, experimentellen Untersuchung und dynamischen Simulation eines solchen HTCB-Systems. Hierzu wird ein neuartiger Hochtemperaturspeicher (HTS) mit horizontaler Durchstr{\"o}mung und integrierter elektrischer Beladung entworfen, der Beladetemperaturen bis 1.200 °C erreicht und eine thermische Kapazit{\"a}t von etwa 10 MWh aufweist. Die R{\"u}ckverstromung erfolgt {\"u}ber einen extern beheizten Gasturbinenprozess mit einer Mikrogasturbine im elektrischen Leistungsbereich von 30 kW. Unter Voraussetzung eines atmosph{\"a}risch betriebenen HTS erweist sich diese Prozessf{\"u}hrung im station{\"a}ren und thermodynamischen Vergleich zu alternativen Gasturbinenprozessen als besonders geeignet. Im experimentellen Betrieb wird eine 45-st{\"u}ndige R{\"u}ckverstromung der zuvor im HTS gespeicherten thermischen Energie demonstriert. Dabei werden elektrische Wirkungsgrade von bis zu 16,5 \% sowie Gesamtwirkungsgrade von bis zu 60,0 \% unter Ber{\"u}cksichtigung der ausgespeisten W{\"a}rme gemessen. Im Fokus der Arbeit liegt die Entwicklung eines flexiblen und physikalisch-deterministischen Simulationsmodells der HTCB, das alle wesentlichen Komponenten auch im Off-Design abbildet. Unter anderem wird f{\"u}r die dynamische Modellierung des HTS und der W{\"a}rme{\"u}bertrager ein innovativer numerischer Ansatz zur Ber{\"u}cksichtigung der Wandtemperaturprofile entwickelt. Die Parametrisierung und der Abgleich mit umfangreichen experimentellen Messdaten erm{\"o}glichen eine Anpassung und Validierung des Gesamtmodells der HTCB. Das Ergebnis ist ein digitaler Zwilling der Versuchsanlage, der realit{\"a}tsnah das dynamische Systemverhalten abbildet und als Grundlage f{\"u}r die Betriebs- und Designoptimierung der HTCB dient. Mit der aufgezeigten Drehzahloptimierung der Mikrogasturbine und dem entwickelten Beladungsmanagement des HTS lassen sich mit der Versuchsanlage elektrische Round-Trip Efficiencies von 14,1 \% und Gesamtwirkungsgrade von 61,9 \% im PV-Strom gef{\"u}hrten Tageszyklus erzielen. Abschließend wird die Skalierung der HTCB auf industrielle Maßst{\"a}be untersucht. F{\"u}r HTS-Systeme mit einer Speicherkapazit{\"a}t von 140 MWh in Kombination mit einer Gasturbine im elektrischen Leistungsbereich von 1,8 MW werden eine elektrische Round-trip Efficiency von etwa 29 \% und Gesamtwirkungsgrade bis 84 \% prognostiziert.}, subject = {Hochtemperaturspeicher; Gasturbine; Simulation; Dynamik; Speicher; High temperature energy storage; Gas turbine; Dynamics; Simulation; Elektrischer Speicher; Hochtemperatur; Gasturbine; Simulation; Digitaler Zwilling; Optimierung}, language = {de} } @phdthesis{GhomsiWabo2025, author = {Ghomsi Wabo, Samuel}, title = {Aktivierung stickstoffmodifizierter Kohlenstoffmaterialien mit KOH : Untersuchungen zum Porenbildungsprozess sowie zum Stickstoffaustrag}, doi = {10.26127/BTUOpen-7219}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72194}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {In dieser Arbeit wurden der Aktivierungsprozess und der Stickstoffaustrag w{\"a}hrend der KOH-Aktivierung stickstoffmodifizierter Kohlenstoffmaterialien untersucht, um die spezifischen und synergistischen Beitr{\"a}ge von Stickstoff und KOH zur Porosit{\"a}tsbildung in diesen Materialien zu kl{\"a}ren. Hierf{\"u}r wurden geeignete Referenzsysteme aus verschiedenen Kohlenstoffquellen (Cellulose und Phenolharz) hergestellt, bei denen Syntheseparameter wie der Harnstoffgehalt, die KOH-Konzentration und die Karbonisierungstemperatur systematisch variiert wurden. Es wurde festgestellt, dass eine Erh{\"o}hung des Harnstoffgehalts in der Synthesemischung zu einem h{\"o}heren Stickstoffgehalt in den Charcoals f{\"u}hrt - ein Effekt, der bei cellulosebasierten Materialien ausgepr{\"a}gter ist. Die KOH-Aktivierung f{\"u}hrte, unabh{\"a}ngig von der verwendeten Kohlenstoffquelle, zu einem erheblichen Stickstoffaustrag. Bei hohen KOH-Konzentrationen (> 10 M) war kein Stickstoff mehr im Material nachweisbar, was eng mit der Bildung einer ausgepr{\"a}gten Porosit{\"a}t zusammenh{\"a}ngt. Allerdings zeigte sich, dass der Gewinn an Porenvolumen durch den Austrag stickstoffhaltiger Spezies relativ gering ist. Stickstoff wirkt haupts{\"a}chlich als Katalysator f{\"u}r Redoxreaktionen zwischen KOH bzw. dessen Zersetzungsprodukten und Kohlenstoff, indem er die Bildung von K₂CO₃ beg{\"u}nstigt. Diese Kaliumspezies k{\"o}nnen die graphitische Struktur des Materials zerst{\"o}ren und zus{\"a}tzliche chemische Prozesse unterst{\"u}tzen, was zu einer intensiveren Aktivierung f{\"u}hrt. Die Bildung von K₂CO₃ ist stark vom Stickstoffgehalt abh{\"a}ngig und wurde ausschließlich bei Kohlenstoffen beobachtet, die mit einer Kombination aus hoher KOH-Konzentration und hohem Stickstoffgehalt hergestellt wurden. Im Gegensatz dazu f{\"u}hrte eine Kombination aus hoher KOH-Konzentration und niedrigem Stickstoffgehalt nicht zur Bildung von K₂CO₃, was darauf hinweist, dass die chemischen Wechselwirkungen des Kaliums in diesem Szenario eine untergeordnete Rolle bei der Porosit{\"a}tsbildung spielen. In solchen F{\"a}llen erfolgt die Aktivierung des Materials prim{\"a}r {\"u}ber Redoxreaktionen, bei denen Kohlenmonoxid (CO) und Kohlendioxid (CO₂) als Reaktionsprodukte entstehen. Diese Redoxreaktionen bewirken eine Umstrukturierung des Materials, jedoch ohne eine signifikante Ver{\"a}nderung der graphitischen Struktur durch Kaliumspezies. Anderseits ist die hohe KOH-Konzentration entscheidend f{\"u}r die Bereitstellung von Kaliumverbindungen, die gezielt in die Schichtstruktur des Materials eindringen und diese effektiv aufbrechen.}, subject = {KOH-Aktivierung; Stickstoffmodifizierte Kohlenstoffen; Porous carbons; Nitrogen-modified carbons; KOH activation; Pore formation; Catalytic effect of nitrogen; Por{\"o}se Kohlenstoffe; Porenbildung; Katalytischer Effekt von Stickstoff; Kohlenstoffwerkstoff; Stickstoffverbindungen; Por{\"o}ser Stoff; Aktivierung ; Kaliumhydroxid}, language = {de} } @misc{OPUS4-7094, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,34 (04.12.2025)}, doi = {10.26127/BTUOpen-7094}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70944}, year = {2025}, abstract = {Beitragsordnung der Studierendenschaft der Brandenburgischen Technischen Universit{\"a}t Cottbus-Senftenberg vom 18. November 2025 f{\"u}r das Sommersemester 2026}, language = {de} } @article{ErtugrulEmdadiHaertel2025, author = {Ertugrul, G{\"o}khan and Emdadi, Aliakbar and H{\"a}rtel, Sebastian}, title = {Powder production and additive manufacturing of iron aluminide alloys using plasma ultrasonic atomization and laser-directed energy deposition}, series = {Additive Manufacturing Letters}, volume = {14}, journal = {Additive Manufacturing Letters}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2772-3690}, doi = {10.1016/j.addlet.2025.100313}, year = {2025}, abstract = {With a combination of desirable properties such as low density, high specific yield strength, low material cost, and excellent oxidation and corrosion resistance, iron aluminide (Fe-Al) has shown considerable potential to be an alternative to high-alloy chromium steels, and in some cases even nickel-based superalloys, in hightemperature applications. Due to these features, it is especially suitable for the aerospace and automotive industries. Recent advancements indicate an increasing interest in Fe-Al within the additive manufacturing industry, particularly in directed energy deposition (DED) processes. Despite this progress, processing of Fe-Al materials using the laser directed energy deposition (L-DED) has not been sufficiently investigated. In this study, Fe-Al powder material was produced from a commercial Al rod encased in a commercial low alloy-steel tube by a plasma-based ultrasonic atomization eliminating the need to cast an alloy ingot in advance. Subsequently, the produced powder was used in a L-DED process to fabricate an additively manufactured sample. The sample was investigated in terms of mechanical property, microstructure, chemical composition, and phase structure by scanning electron microscope (SEM) / energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and microhardness analyses.}, subject = {Iron aluminides (Fe-Al); Laser directed energy deposition (L-DED); Plasma ultrasonic atomization; Powder; Intermetallic phase}, language = {en} } @article{AsliMhgoubKlaus2025, author = {Asli, Majid and Mhgoub, Mosaab and Klaus, H{\"o}schler}, title = {Numerical investigation of a turbine working with a highly unsteady exhaust flow of a hydrogen-driven rotating detonation combustion}, series = {International Journal of Thermofluids}, volume = {29}, journal = {International Journal of Thermofluids}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2666-2027}, doi = {10.1016/j.ijft.2025.101356}, year = {2025}, abstract = {Traditionally, turbomachines are designed for steady-state operations around which they achieve optimal performance and efficiency. However, in novel applications, a turbomachine may be exposed to unsteady flow forcing the machine to operate under fluctuating off design conditions. Pressure Gain Combustion (PGC) through detonation can be an extreme example of unsteady flow which affects the turbine performance adversely. The efficient way of energy extraction from PGCs is still an open question which needs extensive turbine design optimizations for such unsteady flow. Any flow field optimization problem in such applications needs a multitude of simulations, which can be too computationally expensive to be utilized as it is realized as an unsteady 3D-CFD problem. In this regard, the current study aims at proposing and evaluating an approach for optimizing a turbine working under highly unsteady exhaust flow of a Rotating Detonation Combustion (RDC). A two stage turbine is placed downstream an RDC and the turbine inlet condition is calculated by a 2D-Euler simulation tool. A turbine optimization problem is defined and three optimization processes with an objective of minimizing entropy are performed using steady-state 3D-CFD simulation as the objective function evaluator. The turbine inlet boundary conditions in the three optimization efforts include peak, mean and trough values of the RDC outlet pulsating flow condition. Finally, detailed unsteady simulations are carried out for the three new geometries and compared with the baseline turbine. The results showed that the steady-state Reynolds Averaged Navier Stocks (RANS) simulations can be utilized using either mean or trough values of the pulsating boundary condition in iterating a design optimization problem, instead of full unsteady RANS simulations applying time and circumferential location dependent boundary conditions. Given the specific RDC boundary condition and the turbine geometry in this study, the optimized turbine exhibited up to 7.71\% less entropy generation and up to 7\% higher output power compared to the baseline counterpart in unsteady operation. This approach enables a more efficient design optimization process while accounting for the complex dynamics of the RDC exhaust flow. Overall, the approach presented in this paper is practical for optimizing highly unsteady turbomachines specifically for the case of RDCs during any early design optimization procedure, addressing the computational challenges associated with simulating unsteady flows while ensuring the turbine's effectiveness under real operating conditions.}, subject = {Unsteady turbine; Entropy generation; Rotating detonation; Optimization; Computational fluid dynamic}, language = {en} } @article{LeunerHirschlBezerraetal.2025, author = {Leuner, Bruna and Hirschl, Bernd and Bezerra, Pedro Henrique and Pedrosa Quintino, Wellington and Bezerra, Roberta and Cavalcante Silva, Rodolfo}, title = {Indigenous bioeconomy in Brazil : how to determine the local biomass potential in indigenous territories}, series = {Journal of Integrative Environmental Sciences}, volume = {22}, journal = {Journal of Integrative Environmental Sciences}, number = {1}, publisher = {Taylor \& Francis}, address = {London}, issn = {1943-8168}, doi = {10.1080/1943815X.2025.2566009}, year = {2025}, abstract = {The increased expansion of agricultural areas in central Brazil has been cited as a contributing factor to deforestation, soil degradation and water pollution. The impact of this expansion extends beyond the boundaries of the territory of the Xavante indigenous group. These protected areas have experienced a marked decline in available food resources and an unreliable energy supply. The term "indigenous bioeconomy" represents a holistic approach that aims to enhance the well-being of indigenous communities. It recognises indigenous knowledge and promotes the sustainable use of resources. The indigenous bioeconomy contributes to climate protection, by avoiding deforestation and replacing the use of fossil fuels in isolated areas with biogenic alternatives. This paper analyses the local biomass potential of a community within the Pimentel Barbosa Indigenous Territory of the Xavante ethnic group. Participatory research was employed to gain an in-depth understanding of the customary Xavante practices. The theoretical biomass potential was estimated at around 2700 tonnes per year (t/a), which is defined as the total amount of selected biomass types available in the investigated area. Local practical biomass potential considers the per capita consumption of this biomass by the indigenous population. Furthermore, the authors quantified the unused biomass potential, representing biomass that could be used for various purposes including food, medicine and energy. Biomass residues have an untapped potential of around 180 t/a. The paper outlines possible utilisation scenarios for these residues and considers the challenges associated with food and energy security in indigenous territories.}, subject = {Indigenous bioeconomy; Local biomass potential; Cerrado biome; Xavante}, language = {en} } @techreport{SchmidtFuegenschuh2025, type = {Working Paper}, author = {Schmidt, Johannes and F{\"u}genschuh, Armin}, title = {Inter-sample avoidance in trajectory planning via an integer-polytope formulation for mixed-integer optimization}, doi = {10.26127/BTUOpen-7169}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71697}, year = {2025}, abstract = {Autonomous vehicles such as drones or mobile robots must plan trajectories that avoid static obstacles. Their dynamics are captured by Newton's laws and discretized numerically, so the vehicle's position is tracked only at finitely many sample points. The resulting information gap allows a path to cut through an obstacle while still appearing feasible at all samples, a phenomenon called corner cutting. Finer time grids mitigate but never eliminate this artefact and increase computation time. We propose a new inter-sample avoidance scheme for polyhedral obstacles. The facet-defining half-spaces partition the three-dimensional mission space into sub-domains that we encode with binary sign vectors. Feasible one-step moves correspond to a specific subset of these vectors; we (i) enumerate that set exhaustively and (ii) give an integer-polytope formulation that enforces it without additional state variables or extra time steps. For planar motion with a single triangular no-fly zone we prove that the formulation is tight-the polytope equals the convex hull of its 0/1 points. The method is compared qualitatively with existing inter-sample avoidance techniques and its limitations are discussed. Computational experiments with a mixed-integer linear programming model for UAV mission planning, solved by Gurobi, demonstrate that the new formulation achieves realistic trajectories at competitive, or lower, solution times.}, subject = {Mixed-integer optimization; Inter-sample avoidance; Trajectory planning; Convex hull; Unmanned aerial vehicles; Gemischt-ganzzahlige Optimierung; Trajektorienplanung; Konvexe H{\"u}lle; Unbemannte Luftfahrzeuge; Drohne (Flugk{\"o}rper); Autonomes System; Bahnplanung; Gemischt-ganzzahlige Optimierung; Konvexe H{\"u}lle}, language = {en} } @phdthesis{Ampadu2025, author = {Ampadu, Kwame Owusu}, title = {Road traffic gesture autonomous integrity monitoring}, doi = {10.26127/BTUOpen-7222}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72226}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Sensor enabled smart vehicles are predicted to succeed beyond human capabilities, thereby eliminating handling errors intrinsic to human driving. Driverless vehicles must be capable of detecting and responding to exaggerated ad hoc bodily movements that humans use to maintain road traffic safety. These nonverbal communication cues may be used to ease traffic flow, control infotainment systems or restore minimal risk conditions. The integration of sensor fusion techniques and high-quality benchmark datasets coupled to high throughput general purpose graphics processing units is spawning complex heavyweight algorithms useful for traffic scene understanding. These advanced methods are expensive in terms of costs related to hardware, software and energy consumption. Yet, the autonomous vehicle lacks the ability to participate in gestural exchanges. Following extensive evaluations of recent technological advancements in gesture detection and recognition in dynamic traffic environments, a new communication technology has been created for interaction between autonomous and traditional vehicles at unsignalized four-way intersections. This system operates without relying on most conventional navigation sensors and algorithms, allowing autonomous vehicles to communicate with traditional vehicles at intersections through in-vehicle traffic lights that utilize fuzzy logic. The algorithm implemented on low-cost microcontrollers can disperse road traffic and also perform extended blind spot detection. A single sensor is utilized, which remains largely unaffected by adverse weather conditions. The system requires no internet connectivity. It also avoids the need for large scale or long-term data storage, such as the driving cloud platform, ensuring backward compatibility with traditional vehicles. Simulations were conducted based on the order and direction of arrival at three junctions. Results have shown that autonomous vehicles at four-legged intersections, can now communicate with human drivers at a much lower cost achieving precise location classification and lane dispersion in under 30 seconds. This pioneering innovation presents an opportunity to turn every four-way intersection into a signalized junction at zero cost to governments.}, subject = {Advanced Driver Assistance System (ADAS); Autonomous vehicle; Fuzzy logic; Gesture recognition; In-vehicle traffic light; Fahrerassistenzsystem; Autonomes Fahrzeug; Fuzzy-Logik; Gestenerkennung; Fahrzeugintegrierte Ampel; Autonomes Fahrzeug; Fahrerassistenzsystem; Gestenerkennung; Fuzzy-Logik}, language = {en} } @incollection{SchmittWendland2021, author = {Schmitt, Rebecca Erika and Wendland, David}, title = {Untersuchung der geometrischen Konzeption der Gew{\"o}lbe der Basilika Vierzehnheiligen auf Basis von 3D-Scanningdaten im Kontext der Stereotomie}, series = {Materialgerecht konstruiert!?! Tagungsband der F{\"u}nften Jahrestagung der Gesellschaft f{\"u}r Bautechnikgeschichte 10. bis 11. Juni 2021}, booktitle = {Materialgerecht konstruiert!?! Tagungsband der F{\"u}nften Jahrestagung der Gesellschaft f{\"u}r Bautechnikgeschichte 10. bis 11. Juni 2021}, publisher = {Michael Imhof Verlag}, address = {Petersberg}, isbn = {978-3-7319-1253-8}, doi = {10.26127/BTUOpen-6411}, publisher = {BTU Cottbus - Senftenberg}, pages = {105 -- 121}, year = {2021}, abstract = {Betrachtet wird die geometrische Konzeption der Gew{\"o}lbe der von Balthasar Neumann entworfenen Wallfahrtskirche Vierzehnheiligen. Ausgehend vom gebauten Objekt und basierend auf 3D-Scanningdaten, werden mithilfe der Methode des Reverse Geometric Engineering die geometrischen Eigenschaften des Gew{\"o}lbes untersucht und die Konzepte rekonstruiert, die bei der Planung zur Anwendung gekommen sein m{\"u}ssen. Dabei werden die Abteikirche Banz und die Hofkirche der Residenz W{\"u}rzburg als Vergleichsbauten mit einbezogen. Die Entwurfsmethoden werden in ihrem Zusammenhang mit den zeitgen{\"o}ssischen Traktaten der Stereotomie und Architektur, sowie mit bekannten Planungspraktiken bei geometrisch komplexen Bauten betrachtet; dabei wird auch der Bezug zu den Gew{\"o}lbeentw{\"u}rfen des italienischen Barockarchitekten Guarino Guarini diskutiert.}, subject = {Geometrischer Entwurf; Gew{\"o}lbe; Vierzehnheiligen; Balthasar Neumann; Geometric design; Vault; Fourteen Holy Helpers; Reverse engineering; Baustoffkunde und -chemie; Baukonstruktionen; Geschichte der Baukonstruktionen und -technologien}, language = {de} } @article{GhermannZander2025, author = {Ghermann, Diana E. and Zander, Thorsten O.}, title = {Towards neuroadaptive chatbots : a feasibility study}, series = {Front. Neuroergonomics}, volume = {6}, journal = {Front. Neuroergonomics}, publisher = {Frontiers}, address = {Lausanne}, issn = {2673-6195}, doi = {10.3389/fnrgo.2025.1589734}, year = {2025}, abstract = {Large-language models (LLMs) are transforming most industries today and are set to become a cornerstone of the human digital experience. While integrating explicit human feedback into the training and development of LLM-based chatbots has been integral to the progress we see nowadays, more work is needed to understand how to best align them with human values. Implicit human feedback enabled by passive brain-computer interfaces (pBCIs) could potentially help unlock the hidden nuance of users' cognitive and affective states during interaction with chatbots. This study proposes an investigation on the feasibility of using pBCIs to decode mental states in reaction to text stimuli, to lay the groundwork for neuroadaptive chatbots. Two paradigms were created to elicit moral judgment and error-processing with text stimuli. Electroencephalography (EEG) data was recorded with 64 gel electrodes while participants completed reading tasks. Mental state classifiers were obtained in an offline manner with a windowed-means approach and linear discriminant analysis (LDA) for full-component and brain-component data. The corresponding event-related potentials (ERPs) were visually inspected. Moral salience was successfully decoded at a single-trial level, with an average calibration accuracy of 78\% on the basis of a data window of 600 ms. Subsequent classifiers were not able to distinguish moral judgment congruence (i.e., moral agreement) and incongruence (i.e., moral disagreement). Error processing in reaction to factual inaccuracy was decoded with an average calibration accuracy of 66\%. The identified ERPs for the investigated mental states partly aligned with other findings. With this study, we demonstrate the feasibility of using pBCIs to distinguish mental states from readers' brain data at a single-trial level. More work is needed to transition from offline to online investigations and to understand if reliable pBCI classifiers can also be obtained in less controlled language tasks and more realistic chatbot interactions. Our work marks preliminary steps for understanding and making use of neural-based implicit human feedback for LLM alignment.}, subject = {Passive brain-computer interfaces (pBCI); Large-language models (LLM); Error-processing; Moral judgment; AI alignment}, language = {en} } @misc{DechantPietsch2025, type = {Master Thesis}, author = {Dechant, Silke and Pietsch, Ina}, title = {20 Jahre ATA - Erfolgsgeschichte oder Problemfeld? : eine qualitative Studie zur Integration und Etablierung eines noch jungen Berufes als Qualifizierungsweg f{\"u}r den an{\"a}sthesiologischen Funktionsdienst}, doi = {10.26127/BTUOpen-7180}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71806}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {In dieser Forschungsarbeit soll 20 Jahre nach Beginn der ersten Ausbildung die Etablierung der An{\"a}sthesietechnischen Assistenz (ATA) als Berufsgruppe f{\"u}r den an{\"a}sthesiologischen Funktionsdienst unter dem Aspekt der Anerkennungs- und Professionalisierungstheorie untersucht werden. F{\"u}r den Einsatz im an{\"a}sthesiologischen Funktionsdienst haben sich verschiedene Qualifikationswege herausgebildet. Dabei {\"u}berwiegt bisher der traditionelle Weg {\"u}ber eine grundst{\"a}ndige Pflegeausbildung. Die Entwicklung der Fachkr{\"a}ftesituation im Pflegesektor allgemein und speziell im Arbeitsbereich OP zeigt eine große L{\"u}cke zwischen Personalbedarf und -angebot und stellt f{\"u}r die Zukunft eine Herausforderung dar. Leitfadengest{\"u}tzte Experteninterviews wurden mit Mitarbeiter/-innen aller Berufsgruppen des an{\"a}sthesiologischen Funktionsdienstes aus deutschen Krankenh{\"a}usern der verschiedenen Versorgungsstufen gef{\"u}hrt und mit dem qualitativen Forschungstool der Grounded Theory ausgewertet. Ergebnisse: Der Beruf der ATA ist noch nicht fl{\"a}chendeckend in deutschen Krankenh{\"a}usern etabliert. Im Gegensatz zum traditionellen Qualifizierungsweg {\"u}ber eine Pflegeausbildung sind ATA direkt nach Abschluss ihrer Ausbildung fachlich gut auf den Einsatz am an{\"a}sthesiologischen Arbeitsplatz vorbereitet. Trotzdem erwies sich, dass bei den anderen Mitarbeiter/-innen des an{\"a}sthesiologische Funktionsdienstes Vorbehalte gegen{\"u}ber ATAs bestehen k{\"o}nnen. Urs{\"a}chlich zeigten sich unter anderem insbesondere in Abteilungen, die mit ihnen bisher keinen direkten beruflichen Kontakt hatten, große Wissensdefizite zur Ausbildung und Qualifizierung von ATAs. Eine intraprofessionelle Anerkennung des ATA-Berufes ist nicht generell gegeben. Zudem erwies sich als Nebenbefund der OP insgesamt als hierarchiegepr{\"a}gter Arbeitsbereich im Spannungsfeld verschiedener Berufsgruppen. Als zentrales Ergebnis konnte aufgrund unterschiedlicher Kontextfaktoren ein symbolischer Kampf des gesamten nicht{\"a}rztlichen an{\"a}sthesiologischen Funktionsdienstes um Anerkennung herausgestellt werden. Auch 20 Jahre nach Beginn der Ausbildung ist die fl{\"a}chendeckende Etablierung von ATAs in deutschen Krankenh{\"a}usern nicht abgeschlossen. Dieser noch junge Beruf zeigt großes Potenzial f{\"u}r eine Erfolgsgeschichte. Aus dieser Forschungsarbeit ergaben sich wichtige Erkenntnisse und Ans{\"a}tze zur {\"U}berwindung aktuell noch bestehender Problemfelder hin zur fl{\"a}chendeckenden Integration und Etablierung.}, subject = {ATA; Anerkennung des ATA-Berufes; Qualifizierungsweg f{\"u}r An{\"a}sthesie-Funktionsdienst; Etablierung des ATA-Berufes; Anesthesia technical assistant; Recognition as anesthesia technical assistand; Specialization pathway in anesthesia care; Establishment of the anesthesia technical assistant profession; An{\"a}sthesietechnischer Assistent; Berufliche Qualifikation; An{\"a}sthesie; Professionalisierung}, language = {de} } @phdthesis{Goergen2025, author = {G{\"o}rgen, Fabian}, title = {Improving thermal comfort in urban areas : experiment-based development, computational modelling, and performance evaluation of a water-retaining fa{\c{c}}ade module (WRFM)}, doi = {10.26127/BTUOpen-7201}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72019}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Both ongoing urbanization and anthropogenic climate change contribute to the deterioration of thermal comfort in urban areas, reducing quality of life and posing health risks for urban dwellers. As a response, this thesis focuses on the development and investigation of a novel water-retaining fa{\c{c}}ade module (WRFM) that is expected to increase thermal comfort through evaporative cooling, based on natural convection. First, for the design of a water-absorbing layer, selected porous materials were investigated for their hygric and physical properties. The laboratory tests served as the basis for the experiment-based development of a prototype of the WRFM, which was subsequently introduced. Building upon the experimental investigations, a coupled simulation workflow was developed, integrating various software tools to simulate location-specific evaporation rates of the WRFM, considering local microclimatic parameters and evaluating its impact on thermal comfort in an urban context. The coupled simulation workflow was calibrated against in-situ measurements. Subsequently, the effects of the WRFM on the urban environment were investigated in various case studies using the validated coupled simulation workflow. The results of the laboratory investigations revealed favourable material properties of pumice granules, as well as their durability and resistance, underlining their suitability for use as a water-absorbing layer within the WRFM. The calibration process of the workflow's sub models showed a strong fit between measured and final simulated results, validating the coupled simulation workflow as a reliable tool for simulating heat and mass transfer within the WRFM. Evaluating the effects of the WRFM on thermal comfort showed that applying the WRFM to a building fa{\c{c}}ade notably decreased the Physiological Equivalent Temperature (PET) during the day, with slight increases observed during night-time. This effect was mainly attributed to both the increased albedo and the increased specific heat capacity of the WRFM. The WRFM demonstrates potential for improving thermal comfort in urban areas. The developed coupled simulation workflow provides a climate-friendly and location-specific planning tool, which can be used to customize and tailor adaptation strategies, such as the WRFM, to a specific location. The findings of this thesis thus serve as a foundation for future investigations into the WRFM and its potential integration into sustainable urban planning strategies.}, subject = {Thermal comfort; Urban microclimate; Evaporative cooling; Water-retaining fa{\c{c}}ade module; Coupled simulation workflow; Thermische Behaglichkeit; Urbanes Mikroklima; Verdunstungsk{\"u}hlung; Wasserspeicherndes Fassadenmodul; Gekoppelter Simulationsworkflow; Fassade; Wasseraufnahme; Verdunstungsk{\"u}hlung; Behaglichkeit; Stadtklima; Stadtleben}, language = {en} } @inproceedings{OPUS4-7215, title = {Neuroadaptive Technology Conference 2025 Proceedings (NAT'25)}, editor = {Klug, Marius and Zander, Thorsten}, doi = {10.26127/BTUOpen-7215}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-72151}, year = {2025}, abstract = {Neuroadaptive Technology (NAT) continues to advance the integration of real-time neurophysiological measures into adaptive intelligent systems. The Neuroadaptive Technology Conference 2025 (NAT'25), held in Berlin, Germany, brought together scientists and practitioners from neuroscience, computer science, engineering, and the social sciences, alongside representatives from politics, industry, and funding agencies. The conference emphasized both scientific and societal dimensions of neuroadaptive systems, particularly their implications for ethics, policy, and innovation ecosystems. Current developments showcased at NAT'25 highlight how neuroadaptive methods are being extended beyond the laboratory to real-world applications through Brain-Artificial Intelligence Interfaces (BAIs), explainable and neuroadaptive AI (XAI/NAI), and multimodal physiological computing. A recurrent theme across sessions was the societal responsibility accompanying the increasing agency of neuroadaptive and AI-driven systems — from workplace and healthcare applications to autonomous technologies. The programme included six keynote lectures, invited panels, and over forty peer-reviewed contributions covering Brain-Computer and Brain-AI Interfaces, Human-AI Co-Adaptation, Neuroadaptive Systems in Society, Ethics and Regulation, and Machine Learning for Applied Neuroscience. NAT'25 thus marked a further consolidation of the field toward human-aligned, context-sensitive, and socially responsible artificial intelligence.}, subject = {Machine learning; Artificial intelligence; Physiological computing; Brain-computer interface; Neuroadaptive technology; K{\"u}nstliche Intelligenz; Maschinelles Lernen; Neuroadaptive Technologie; K{\"u}nstliche Intelligenz; Maschinelles Lernen; Gehirn-Computer-Schnittstelle; Neurowissenschaften}, language = {en} } @misc{Kwarteng2025, type = {Master Thesis}, author = {Kwarteng, Ferdinand Prempeh}, title = {Security requirements and mechanisms for real-time serverless computing : a focus on Function-as-a-Service (FaaS)}, doi = {10.26127/BTUOpen-7164}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71645}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Serverless computing, particularly its Function-as-a-Service (FaaS) offering, has emerged as a prominent cloud computing model empowering developers to craft event-driven applications by deploying custom application logic in an ephemeral runtime environment. This model abstracts away the underlying infrastructure complexities and management overhead, offering key benefits such as Pay-As-You-Go (PAYG) billing and automated scalability. Although Real-Time (RT) extensions to FaaS (RT-FaaS) have been proposed for realizing the functional requirements of industrial automation virtualization use cases, these architectures introduce distinct security challenges that generic security mechanisms cannot fully address. As a result, RT-FaaS platforms remain vulnerable to both internal and external threats and a variety of exploitation vectors that can compromise the Confidentiality, Integrity and Availability (CIA) security properties of such a platform. The aim of this thesis is to assess the core security requirements of a RT-FaaS platform by evaluating potential vulnerabilities and risks within this environment. We further propose specifically tailored mitigation mechanisms based on the extended Berkeley Packet Filter (eBPF) and cryptographic digital signatures for a RT-FaaS platform with a WebAssembly (WASM) runtime to enhance its resilience without imposing prohibitive performance overheads. Key areas of focus for this work include RT-FaaS runtime isolation, continuous security enforcement and data protection. We evaluated the proposed security mitigation mechanisms on the platform accounting for both effectiveness and performance. By doing so, we discuss the trade-offs between the stringent security requirements and maintaining predictable, low-latency execution essential for industrial automation use cases. While we observed some considerable jitter and latency overheads on the secure RT-FaaS platform, these did not significantly impact the functional performance of the platform. Hence adopting serverless computing for RT industrial automation use cases is feasible while ensuring robust function, system and network security.}, subject = {Serverless computing; Real-time Function-as-a-Service; Industrial automation; Security mechanisms; WebAssembly runtime; Serverloses Computing; Echtzeit-Funktion-als-Dienstleistung; Industrielle Automatisierung; Sicherheitsmechanismen; WebAssembly-Laufzeitumgebung; Serverless Computing; Function as a Service; Sicherheit; Datenschutz}, language = {en} } @phdthesis{ArvidssondeMontes2025, author = {Arvidsson de Montes, Fredrik}, title = {Spider ecology across scales : from microhabitats to landscapes in natural and managed habitats}, doi = {10.26127/BTUOpen-7190}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71906}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Spiders (Araneae) are an exceptionally diverse group, with over 52,000 described species worldwide. They are among the most dominant predators in terrestrial ecosystems and occur on every continent except Antarctica. Spiders play a key role in maintaining biodiversity and ecosystem functioning and acts as important natural enemies of pests in managed habitats. Their communities are influenced by both abiotic and biotic factors, and as a higher trophic group, they are sensitive to environmental changes, making them effective bioindicators. A key driver of spider community composition is the structural complexity of their surroundings, which is influenced by factors such as plant species richness. Greater structural complexity is generally associated with increased prey availability and accessibility, as well as improved microclimatic conditions, which together promote higher spider abundance and diversity. Human activities can both enhance and reduce this structural complexity through various management practices. In this thesis, I have investigated spider communities across a broad geographical span, covering Sweden, Germany, and South Africa, in both natural and managed habitats. Depending on the research question, different trapping techniques were employed, each with its own advantages and limitations, to best capture the relevant ecological information. For large-scale studies comparing sites across broad geographic areas, passive traps such as pitfall traps and Malaise traps were used. In contrast, for studies within habitats, such as orchards, spiders and their prey were hand-collected to assess how different management practices affect spider-mediated pest control. Additionally, one study directly compared traditional scientific surveys with citizen science data to evaluate their relative effectiveness in capturing spider biodiversity and mapping their geographical distribution. This research highlights the intricate relationships between spider communities and their environment. By deepening our understanding of these dynamics, the findings can contribute to conservation strategies and guide land management practices that enhance the role of spiders as natural enemies of pests. In an era of rapid environmental change, such knowledge is increasingly valuable. As a further benefit, this research may help improve public perception of spiders, emphasizing their importance in the ecosystems we all depend on.}, subject = {Spider; Identification; Population; Microhabitat; Ecology; Spinne; Identifikation; Mikrohabitat; {\"O}kologie; Spinnen; Habitat; R{\"a}uber-Beute-Verh{\"a}ltnis; {\"O}kologie; Naturschutz}, language = {en} } @phdthesis{Uka2025, author = {Uka, Naim}, title = {Influence of international law on the issue of missing persons : the right of family members to know the fate of missing persons}, doi = {10.26127/BTUOpen-7183}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71839}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The issue of missing persons remains a pressing humanitarian and legal challenge, particularly in post-conflict societies. This dissertation examines the influence of international law on addressing the fate of missing persons, with a specific focus on the right of family members to truth and justice. The study explores the existing legal frameworks, including International Humanitarian Law (IHL) and Human Rights Law (HRL), to assess their effectiveness in ensuring the rights of families to receive information about their missing relatives. It critically analyzes legal ambiguities, the role of international institutions, and the impact of partial ratification of key legal instruments on national responses to the missing persons issue. Through a comparative approach, the research investigates the legal, political, and institutional obstacles that hinder the resolution of missing person's cases, with a special emphasis on the Balkans. The study also evaluates the role of civil society organizations in advocating for accountability and truth, assessing their contributions to legal reforms and transitional justice mechanisms. Findings suggest that while international law provides a robust framework for addressing the missing person's crisis, gaps in implementation and political considerations continue to obstruct progress. This research contributes to the ongoing discourse on humanitarian law and human rights by proposing recommendations for strengthening legal mechanisms, enhancing international cooperation, and improving the rights of families to truth, justice, and reparation. The dissertation underscores the necessity of depoliticizing the missing persons issue to ensure that humanitarian concerns take precedence over state interests.}, subject = {Missing persons; International law; Human rights; Forensic science; Transitional justice; Vermisste Personen; V{\"o}lkerrecht; Menschenrechte; Forensische Wissenschaft; {\"U}bergangsjustiz; Balkanhalbinsel; Menschenrecht; Humanit{\"a}res V{\"o}lkerrecht; Vermisster; Aufkl{\"a}rung ; Nachkriegszeit}, language = {en} } @misc{OPUS4-7092, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,33 (18.11.2025)}, doi = {10.26127/BTUOpen-7092}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70928}, year = {2025}, abstract = {1. Zweite {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Cyber Security (M.Sc.) vom 17. November 2025 2. Lesefassung: Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Cyber Security (M.Sc.) vom 22. September 2017 (AMbl. 24/2017) i. d. F. der Zweiten {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Cyber Security (M.Sc.) vom 17. November 2025}, language = {de} } @phdthesis{Babel2025, author = {Babel, Christoph Josef}, title = {Virtual evaluation of car body panel surfaces}, doi = {10.26127/BTUOpen-7196}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71960}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The progression of the automotive industry has introduced a slew of complex designs to meet the personalized style expressions of consumers. However, these intricate designs in premium automobiles present significant manufacturing challenges, especially in detecting and prioritizing the varying severities of cosmetic surface defects. Traditionally, defect identification is performed at the end of the development phase, which is a costly and time-consuming process. This thesis seeks to enhance early defect detection efficiency in the concept phase using artificial intelligence (AI). Through examination of unpainted parts, auditors' perceptual practices, and deep draw simulations, the research aims to establish a virtual prediction method to accurately classify surface defects. The findings of this thesis prove that the geometry of unpainted parts sufficiently predicts potential defects post-painting, refuting the need for physical painted part analysis. The identification process adopted by auditors, grounded in analyzing light distortions on surfaces, is replicated within a neural network. Furthermore, by incorporating physiological optical aspects, the thesis improves the virtual representation of defects, creating a visible and analyzable dataset for AI algorithms. The accuracy of the neural networks trained on such datasets is substantiated by the successful translation of auditors' classification methods into a machine learning environment. In particular, a machine learning approach using Random Forest (RF) algorithms excelled in prefiltering areas of interest based on curvature and strain values. A convolutional recurrent neural network (CRNN) is developed to classify the severity of defects, with the introduction of an annotation application to label data by experts. The CRNN demonstrated a remarkable accuracy of 86 \% in classifying defect severity based on simulation data. Moreover, the study assessed the frame-by-frame localization of defects, where the PatchCore anomaly detection algorithm proves optimal, achieving an F1 Score of 0.86. Overall, the research successfully shows the transferability of expert auditors' perception into a neural network architecture, highlighting the feasibility of implementing AI in early phases of automotive design to predict and classify defects, which has the potential to significantly reduce development costs and improve manufacturing efficiency.}, subject = {Computer vision; Neural network; Deep draw simulation; Rendering; K{\"u}nstliche Intelligenz; Maschinelles Lernen; Umformsimulation; Bildgenerierung; Kraftfahrzeugindustrie; Produktentwicklung; Tiefziehen; Fehlererkennung; Simulation; K{\"u}nstliche Intelligenz; Maschinelles Lernen}, language = {en} } @inproceedings{OPUS4-6163, title = {Visualising significance : mapping as common denominator ; proceedings from the 6th International Conference on Heritage Conservation and Site Management Berlin and Cottbus, 5 and 6 December 2018}, editor = {Skedzuhn-Safir, Alexandra}, doi = {10.26127/BTUOpen-6163}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-61630}, year = {2022}, abstract = {Mapping as a tool and method is foremost employed as a means to analyse and organise information visually. We see maps daily: on television or the internet to see what the weather holds in store for us, on the subway to work, or our cellphones while navigating our way through the streets. Regardless of which objects or events maps record, maps help to filter, organise, and visualise information. However, contemporary maps are still criticised for their hegemonic, Eurocentric representations with their inherent claim for knowledge and, ultimately, legitimisation of power. Maps, with their ability to document heritage and its significance across various scales and objects, are not just tools for interpretation and communication. They also have the potential to challenge political agendas and offer alternative perspectives and narratives. The conference proceedings, which are based on case studies, showcase the diverse range of methodological approaches, data, and actors involved in the mapping process. This diversity underscores the complexity of the field and the many ways in which mapping can be approached and utilised.}, subject = {Cultural heritage; Mapping; Cultural significance; Cultural mapping; Visualisation; Kulturelles Erbe; Kartierung; Kulturelle Bedeutung; Kultur Kartierung; Visualisierung; Kulturerbe; Bedeutung; Kartierung; Visualisierung; Informationsfilterung}, language = {en} } @phdthesis{OuaboKamkumo2025, author = {Ouabo Kamkumo, Florent}, title = {Stochastic epidemic models with partial information and dark figure estimation}, doi = {10.26127/BTUOpen-7197}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71976}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {This thesis presents a novel stochastic modeling framework for epidemic dynamics, focusing on the challenges posed by non-observable states and the gradual decline of immunity, as revealed by the Covid-19 pandemic. Our research develops an extended compartmental model that incorporates sequences of cascade states to accurately represent the progressive loss of immunity after vaccination or recovery. This model, rooted in a non-homogeneous continuous-time Markov chain and approximated by a diffusion process, facilitates efficient computation. The resulting dynamics exhibit non-linearities in both the drift and diffusion coefficients, making the process of hidden state estimation particularly challenging. These complexities highlight the need for advanced techniques to accurately capture and predict the system's behavior under partial observability. A novel approach using cascade states is introduced to tackle the issue of partially hidden compartments where either inflow or outflow is observed, but not both. By leveraging information from observed transitions, this method significantly enhances model accuracy. The framework also enables the application of advanced filtering techniques, particularly the Extended Kalman Filter (EKF), for estimating both hidden epidemic states and time-varying parameters. This allows for calibrating based on real data, ensuring robust and accurate predictions. Furthermore, this thesis extends the methodology to multi-group (multi-patch) models, capturing the complexities of heterogeneous population dynamics. This includes factors such as mobility, super-spreader events, and accounting for partial information. By incorporating these elements, the model provides a more comprehensive understanding of epidemic spread across diverse and interconnected populations. To address the curse of dimensionality often encountered in high-dimensional filtering problems, a modified EKF based on a reduced-order EKF is introduced, leveraging a low-rank approximation of the covariance matrix. This reduced-order EKF allows for stable and efficient estimation of hidden states even with limited computational resources. Finally, the work explores parameter estimation within the partial information context, employing both likelihood-based inference and state augmentation techniques. Numerical experiments demonstrate the model's ability to accurately reproduce observed Covid-19 dynamics in Germany, highlighting its potential for informing public health strategies and managing future outbreaks. This work offers a robust and adaptable framework for understanding and predicting the spread of infectious diseases.}, subject = {Compartmental model; Stochastic model; Partial information; Extended Kalman filter; Parameter estimation; Kompartimentmodell; Stochastisches Modell; Teilinformationen; Erweiterter Kalman Filter; Parametersch{\"a}tzung; Stochastische optimale Kontrolle; Kompartimentmodell; Kalman-Filter; Partielle Information}, language = {en} } @phdthesis{Franck2025, author = {Franck, Max}, title = {Synthesis of hexagonal boron nitride on CMOS-compatible substrates via chemical vapor deposition}, doi = {10.26127/BTUOpen-7192}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71925}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {About 20 years ago, the discovery of an easy method to exfoliate single atomic layers of graphene opened the door for the investigation of 2D materials. They often exhibit superior electrical and mechanical properties compared to their 3D counterparts, and in addition, entirely new physical properties emerge at these ultra-low thickness scales, making 2D materials a highly interesting topic of materials research. A large variety of 2D materials with various electrical properties have since been discovered: graphene is a conductor with an extremely high charge carrier mobility, several transition metal dichalcogenides are direct bandgap semiconductors with the bandgap value being dependent on the chemical composition, and hexagonal boron nitride (hBN) is an insulator. This means that, in principle, all the building blocks for 2D microelectronic devices are available, which would mark the ultimate miniaturization. In practice, this vision is far from being realized, as large-scale fabrication methods for 2D materials and their heterostructures are still under development. Hexagonal boron nitride has a large range of applications, as it plays a central role in 2D microelectronics: not only are dielectrics a crucial part of microelectronic devices, but hBN is also necessary to shield other 2D materials from contact with the 3D environment, which causes deterioration of their intrinsic properties. Further potential applications are deep UV optoelectronics, thermal neutron detection, and single-photon emitters for quantum communication. While synthesis of single-crystalline hBN monolayers and high-quality multilayers has been demonstrated on a 2" wafer scale, it relies on catalytic transition metals, such as Cu, as the growth substrates. Obviously, one layer does not a device make, and thus transfer of the grown hBN films is usually employed to fabricate full devices. Unfortunately, this leaves behind metal contaminations at concentrations that are incompatible with the stringent purity requirements in CMOS manufacturing lines. In order to facilitate integration of 2D materials into established CMOS technology, which is deemed the most promising route for their large-scale adoption, synthesis of hBN on CMOS-compatible substrates, such as Si, Ge, and dielectrics, is desirable. At the beginning of my work, almost no literature on this topic was available, especially not for Ge and Si substrates. In this thesis, a growth process for hBN on Ge(001) via high-vacuum chemical vapor deposition is developed. The influence of various process parameters on the morphology, structure, and crystalline quality of the grown films is studied, and the growth process is optimized towards ultra-thin, smooth, and high-quality hBN. Additionally, the efficacy of standard characterization methods is evaluated and alternatives are explored. Furthermore, the optimized growth process is applied to Si(001) and graphene growth substrates, also yielding high-quality hBN films.}, subject = {Chemical vapor deposition; Hexagonal boron nitride; 2D materials; Thin film deposition; Chemische Gasphasenabscheidung; Hexagonales Bornitrid; 2D-Materialien; D{\"u}nnschichtabscheidung; Zweidimensionales Material; D{\"u}nnschichttechnik; Bornitrid; Hexagonaler Kristall; CVD-Verfahren}, language = {en} } @misc{EverthKassner2024, type = {Master Thesis}, author = {Everth, Stefanie and Kaßner, Astrid}, title = {„Die Pflege entwickelt sich weiter" : eine Forschungsarbeit zur Lehre in der Praxis}, doi = {10.26127/BTUOpen-7176}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71762}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Die Masterarbeit untersucht das pflegewissenschaftliche und pflegedidaktische Anleitungshandeln sowie die habitualisierten Praktiken von Lehrenden in der Praxis in der pflegeberuflichen Ausbildung. Verglichen werden akademische und berufsbildende Lehrende in der Praxis aus den pflegerischen Settings: akutstation{\"a}r, station{\"a}re Langzeitpflege und ambulante Pflege. Ziel ist es, empirische Erkenntnisse {\"u}ber die Gestaltung der Praxislehre und {\"u}ber das Selbstverst{\"a}ndnis zu gewinnen sowie Entwicklungsm{\"o}glichkeiten aufzuzeigen. Mittels qualitativer Sozialforschung wurden 14 leitfadengest{\"u}tzte Expertinnen- und Experteninterviews mit Lehrenden in der Pflegepraxis nach der Grounded-Theory-Methodologie durchgef{\"u}hrt und ausgewertet. Die Datenanalyse erfolgte durch offenes, axiales und selektives Kodieren inklusive der Anwendung des mentalen Felds als Forschungstool. Die Ergebnisse zeigen, dass die habitualisierten Praktiken im Anleitungshandeln von Lehrenden in der Praxis kontrastierende pflegewissenschaftliche und pflegep{\"a}dagogische Begr{\"u}ndungsmuster aufweisen. Ihr Berufsverst{\"a}ndnis, ihre Kompetenzbildung und Wissensbedarfe beeinflussen maßgeblich die Gestaltung der Praxislehre. Anhand von Fallrekonstruktionen werden unterschiedliche Anleitungsprofile herausgearbeitet. Die Forschungsarbeit begr{\"u}ndet empirisch die Notwendigkeit einer st{\"a}rkeren Professionalisierung der Lehrenden in der Pflegepraxis. Empfehlungen zur hochschulischen Qualifizierung unter Einbindung der berufsbildenden Lehrenden werden abgeleitet.}, subject = {Lehre in der Pflegepraxis; Habitualisierte Praktiken; Pflegeberufliche Ausbildung; Lehrendenprofessionalisierung; Anleitungshandeln; Teaching in nursing practice; Habitualised practices; Nursing education; Professionalisation of teachers; Instructional action; Pflegeberuf; Pflegep{\"a}dagogik; Pflegewissenschaft; Professionalisierung}, language = {de} } @phdthesis{Pomp2025, author = {Pomp, Caron}, title = {Regional innovation systems and structural change in Lusatia}, doi = {10.26127/BTUOpen-7187}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71871}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The 2015 Paris Agreement called on developed countries to reduce greenhouse gas emissions to prevent the average global temperature from rising above 2°C. To achieve this goal, Germany decided to phase out lignite by 2038 at the latest. Recognising that the phase-out would lead to structural change in lignite mining regions, the government established the Coal Commission, which issued recommendations in its final report on how to manage this structural change. Lusatia, one of Germany's three lignite mining regions, will receive a total of €17.2 billion. This money will be used to fund research and innovation, secure the competitiveness of the regional economy and transform the regional energy system with new technologies and business models. However, the question is whether this unique amount of funding will be sufficient to stimulate regional economic development and green transformation in the rural and peripheral region. This dissertation aims to contribute to answering this question from the perspective of Regional Innovation Systems (RIS). The RIS framework helps to explain the uneven geographical distribution of innovation and serves as a basis for the design and implementation of place-based innovation policies, the promotion of regional innovation capacity and the development of new industrial paths. The work is based on three different studies that focus on certain aspects of the RIS framework. Chapter 2 is dedicated to the question if the strength of German RIS is related to the cooperation for innovation. The study finds that there is indeed a strong positive correlation between the two, which helps to understand why it is useful to foster cooperation and establish new research institutes to improve Lusatia's RIS in the long term. Chapter 3 analyses green path development in the lignite industry and the influence of the respective RIS in the German mining regions. While there was an observable shift towards renewables in the regions, the lignite industry was hardly connected to the three RIS. In addition, especially the lignite industry in Lusatia suffered from technological lock-in and only started to pursue a path renewal after the phase-out decision. The implication is that transforming industries should be supported, but their willingness to transform is likely to depend on changes in regulatory and market conditions at the national or even international level, rather than on RIS conditions. Chapter 4 focuses on the Smart Specialisation approach and analyses if Smart Specialisation in the field of energy is realistic in Lusatia. The study shows that the potential for such specialisation has not been sufficient in the past, but that critical masses can be achieved if the new research facilities and projects actually attract new companies and workers in the long term and if this remains the case after the initial funding has ended.}, subject = {Regional innovation systems; Structural change; Lusatia; Regionale Innovationssysteme; Strukturwandel; Lausitz; Lausitz; Strukturwandel; Regionale Wirtschaftsentwicklung; Innovation}, language = {en} } @phdthesis{Wagner2025, author = {Wagner, Eduard}, title = {Circular data value creation}, doi = {10.26127/BTUOpen-7184}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71846}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {One fundamental problem hindering the achievement of a circular economy is the limited utilisation of data and the persistence of information asymmetries between value chain stakeholders. Although large volumes of data exist across product life cycles, they are often unevenly distributed and lack transparency and collaboration. Digital technologies are increasingly promoted as enablers to bridge these gaps. The discourse and theoretical basis in this context centre on three interlinked elements that must be considered as an integrated system: data, stakeholders, and sustainability. Previous research has tended to analyse these elements separately, while this thesis argues that they need to be studied together to understand under which conditions data can create value for circularity. This provides the rationale for introducing and exploring the concept of circular data value creation (CDVC), a framework that synthesizes these core elements to provide a holistic understanding of how data can generate value within the circular economy. Within this framework, the Digital Product Passport (DPP) is conceptualized as a tool that interlinks these components, supporting a system-of-systems approach. The research unfolds through three studies, each addressing different aspects of the CDVC framework. The first study (article 1) focuses on the role of data as the starting point of potential value retention and creation for circularity. It presents an explorative analysis of a large-scale repair dataset to highlight challenges in data structuring and potential applications for enhancing circularity. This study reveals that stakeholder-generated data, such as repair records, is often underutilized, burdened by non-standardized coding, missing contextualization, and limited sample sizes. The findings underscore the necessity for robust cleaning techniques, harmonization across data formats, and incentives to encourage data sharing. Moving beyond the operational level, the second study (article 2) addresses stakeholder dynamics necessary for effective data utilization. It investigates information asymmetries along product lifecycles, assessing the role of DPPs in mitigating these barriers. The study identifies information barriers rooted in economic, social, and technological constraints and discusses how DPPs could address these. However, while DPPs and other digital tools aim to reduce information barriers, they also introduce environmental costs that must be assessed (article 3). A meta-analysis of life cycle assessments (LCAs) of digital infrastructures, such as those used in DPPs, evaluates whether the sustainability benefits, such as improved repair and reuse, outweigh the carbon footprint of digital systems. The findings show that DPPs can contribute to sustainability, but their impact depends on the extent to which they are adopted and effectively used across the value chain. Integrating theoretical insights with empirical evidence, this thesis offers an understanding of how data, enabled by digital tools, can support circular economy practices. It combines conceptual understanding and practical application. The CDVC framework lays the groundwork for future work, such as the quantification of higher-order sustainability impacts of data-sharing tools or understanding how digital interfaces influence engagement with repair, reuse, and recycling.}, subject = {Circular economy; Digitalisation; Circular data; Digital product passport; Sustainability; Kreislaufwirtschaft; Zirkul{\"a}re Daten; Digitaler Produktpass; Digitalisierung; Nachhaltigkeit; Produktlebenszyklus; Kreislaufwirtschaft; Digitalisierung; Datenaustausch; Nachhaltigkeit}, language = {en} } @phdthesis{Martens2024, author = {Martens, Christian}, title = {A study of the charge and spin order dynamics for cuprate superconductors : a Gutzwiller analysis for the single-band Hubbard model}, doi = {10.26127/BTUOpen-7194}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71945}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {In recent years, the role of charge density waves (CDW) in the study of high-temperature superconductors, such as cuprates and nickelates, has gained importance, so that CDW can provide potential insights into the mechanism of high-temperature superconductivity. Cuprates and nickelates are transition metals and have their valence electrons in the d-orbitals, which makes them belong to the family of correlated materials. In the past, a variety of experimental techniques, such as X-ray scattering and neutron scattering, have been performed to better understand such materials and the electronic properties of CDWs and spin-density waves (SDWs), which are thought to be connected to high-temperature superconductivity. However, the exact nature of CDW, SDW is not yet fully understood. Often correlated materials are described with the so-called multi-band Hubbard model, which takes into account the Coulomb interactions in d- or f-orbitals with a local parameter U. In the structure of the cuprate high-temperature superconductor LCO, the low-energy electron structure of the CuO2 planes is of interest, as this is where CDW, SDW and 2D high-temperature superconductivity take place. For this reason, the 3-band Hubbard model is often used, which takes into account the interaction of the Cu and O orbitals. Here we describe the time-dependent Gutzwiller approximation (TDGA) for the single-band Hubbard model. The description of a single-band construct for the Hubbard model was discussed in the work of Zhang and Rice, where they assume a hybridisation of the copper atom with the neighbouring oxygen atoms inside the unit cell forming a singlet state. While the Gutzwiller approximation can be solved analytically in one dimension using the Bethe ansatz, for real systems one has to resort either to the exact diagonalisation of small clusters or to approximation methods. We analyse the non-equilibrium dynamics of the electron structure in comparison to the optical conductivity in the linear response and non-equilibrium case. The starting point is the half-filled antiferromagnetic (AF) state, which is forms in LCO at weak hole doping p and allows the description of the stripe state by introducing hole doping near zero temperature. The focus here is on the site-centered and bond-centered stripe states characterized by a domain wall, which possesses an accumulation of hole doping and inverts the spin order. The results of the TDGA are compared with those of the time-dependent Hartree-Fock approximation (TDHF) and, in the case of the stripe states, also with the time-dependent Landau theory (TDL).}, subject = {Charge stripes; Spin stripes; Time-dependent Gutzwiller approximation; Single-band Hubbard model; Zeitabh{\"a}ngige Gutzwiller-Approximation; Ladungs-Stripes; Spin-Stripes; Einband-Hubbard-Modell; Hochtemperatursupraleitung; Cuprate; Ladungsdichtewelle; Spindichtewelle; Elektronenstruktur}, language = {en} } @phdthesis{Roy2025, author = {Roy, Ashley Comma}, title = {Economic analysis of invasive alien species management : a case study of 𝘏𝘢𝘭𝘺𝘰𝘮𝘰𝘳𝘱𝘩𝘢 𝘩𝘢𝘭𝘺𝘴 in Germany}, doi = {10.26127/BTUOpen-7170}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71703}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Invasive alien species (IAS) are major drivers of biodiversity loss and impose rising economic costs. Global trade and climate change facilitate their spread and establishment, threatening agriculture, forestry, and fisheries. Despite recognition of these risks, economic consequences are often underestimated, delaying effective responses. IAS management requires balancing ecological, economic, and social considerations. This study addresses two objectives: (1) to quantify the economic costs of invasive alien species under current and projected climate scenarios, and (2) to evaluate public preferences for IAS management, focusing on the trade-offs between chemical and biological control strategies through a case study of the brown marmorated stink bug (Halyomorpha halys) invasion in German apple orchards. To address the first objective, the study combined a logistic spread model based on climate suitability projections for 2022-2050 with an economic model to estimate invasion costs under four management scenarios: no control, chemical control, biological control, and integrated pest management (IPM). Results show that even early infestations can cause significant economic losses if unmanaged. By 2050, as more areas become suitable for pest establishment, invasion costs rise sharply, demonstrating that delayed intervention greatly increases both damages and resources needed to control the invasion. For the second objective, a discrete choice experiment was employed to understand the public preference for managing IAS using no control, chemical control, and biological control. Respondents strongly favored biological control, even with risks of invasiveness, and rejected no control as an option. Willingness to pay reached €2.32/kg for biological control, while chemical control received moderate support, mainly due to production concerns. Socio-demographic factors such as age, gender, education, income, political orientation, ecological involvement, and risk-taking shaped preferences. Political orientation proved significant: conservative and liberal respondents leaned toward chemical control, while ecologically oriented individuals preferred no intervention. Information framing also mattered: generalized descriptions increased support for biological control, while quantitative details revealed greater heterogeneity. These findings highlight the urgency of early IAS intervention and the need to integrate public preferences into policy. The study provides evidence for developing effective strategies to manage Halyomorpha halys and outlines avenues for future research.}, subject = {Invasion cost; Discrete choice experiment; Halyomorpha halys; German apple orchards; Invasive alien species; Invasionskosten; Discrete-Choice-Experiment; Deutsche Apfelplantagen; Invasive Arte; Deutschland; Obstanlage; Invasive Art; Baumwanzen; Kosten; Kontrolle; Diskrete Entscheidung}, language = {en} } @phdthesis{Hagen2025, author = {Hagen, Veselko}, title = {Cybercrime als hybrides Gesamtph{\"a}nomen : Einzelph{\"a}nomene zwischen digital gepr{\"a}gten Deliktsformen, analoger Strafverfolgung und normativer Einordnung}, doi = {10.26127/BTUOpen-7189}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71893}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Diese Dissertation untersucht das Ph{\"a}nomen Cybercrime in seiner hybriden Auspr{\"a}gung zwischen analog gepr{\"a}gten Tatstrukturen und dem Einsatz digitaler Tatmittel. Ziel ist es dabei, ein strukturorientiertes Verst{\"a}ndnis zu entwickeln, das die wachsende Komplexit{\"a}t digital geformter Kriminalit{\"a}t im institutionellen Rahmen der Strafverfolgung abbildet. Im Zentrum steht die Frage, wie staatsanwaltschaftliche Ermittlungs- und Organisationsprozesse am Beispiel der Schwerpunktstaatsanwaltschaft Cottbus strukturell, epistemisch und operativ auf diese Herausforderungen reagieren k{\"o}nnen. Die Methodik kombiniert qualitative Interviews mit Vertreter:innen einer Strafverfolgungsbeh{\"o}rde sowie internationaler Organisationen mit einer strukturierten Dokumentenanalyse und einer Sekund{\"a}rdatenauswertung der Staatsanwaltschaftsstatistik des Landes Brandenburg. Daraus wurde das OET-Cybercrime-Modell entwickelt, das digitale Delikte entlang ontologischer, epistemologischer und institutioneller Dimensionen systematisiert. Die Analyse zeigt deutliche Spannungen zwischen normativer Anspruchslage und tats{\"a}chlicher Verfahrenspraxis. Fehlende Klassifizierungen digitaler Fallstrukturen, informelle Wissensspeicherung sowie nicht abgestimmte Ressourcenzuweisungen erschweren eine zielgerichtete und rechtsstaatlich belastbare Verfolgung hybrider Delikte. {\"U}bergabeverluste sowie unklare Zust{\"a}ndigkeiten gef{\"a}hrden die Beweissicherung und f{\"u}hren zu Effizienzverlusten im Ermittlungsprozess. Zur Behebung dieser Defizite schl{\"a}gt die Arbeit vier zentrale Maßnahmen vor: (1) ein gestuftes Hybridit{\"a}tsscreening zur ersten Fallbewertung, (2) ein KI-gest{\"u}tztes Feedbacksystem zur Qualit{\"a}tssicherung, (3) eine virtuelle Trainingsumgebung in Form eines digitalen Zwillings sowie (4) die Integration internationaler Fortbildungsformate, wie etwa des EEBC-Kurses unter Leitung von Interpol. Letzterer sollte in enger Kooperation mit der BTU in eine strukturierte Fortbildungsarchitektur eingebunden werden. Die Dissertation versteht Cybercrime nicht nur als technisches Deliktfeld, sondern als Ausdruck eines tiefergreifenden Wandels staatlicher Ordnung im Cyberraum. Sie entwickelt ein Modell institutionellen Lernens, das juristische, technische und organisatorische Perspektiven zu einer widerstandsf{\"a}higen Struktur digitaler Strafverfolgung verbindet.}, subject = {Cybercrime; Strafverfolgung; Spezialisierung; Prosecution; Specialization; Computerkriminalit{\"a}t; Strafverfolgung}, language = {de} } @techreport{WinklerHayatRuester2025, author = {Winkler, Herwig and Hayat, Mubashir and R{\"u}ster, Moritz}, title = {KI-basierte Instandhaltungsplanung und -steuerung im {\"o}ffentlichen Verkehr : Status quo und konzeptionelle {\"U}berlegungen}, organization = {BTU Cottbus - Senftenberg, Lehrstuhl f{\"u}r Produktionswirtschaft}, doi = {10.26127/BTUOpen-7161}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71612}, year = {2025}, abstract = {Durch eine sorgf{\"a}ltige Instandhaltung von Z{\"u}gen, Bussen und Flugzeugen l{\"a}sst sich die Verf{\"u}gbarkeit, Betriebssicherheit und Wirtschaftlichkeit dieser Verkehrsmittel maßgeblich sichern. Bislang wurden die daf{\"u}r relevanten planungsintensiven Prozesse in Zugwerkst{\"a}tten mit herk{\"o}mmlichen statischen Planungssystemen durchgef{\"u}hrt. Diese Systeme bilden zwar eine Grundlage f{\"u}r die Organisation der Instandhaltungsarbeiten, sind jedoch nicht in der Lage, optimierte Instandhaltungsprogramme zu erstellen. Infolgedessen treten w{\"a}hrend der tats{\"a}chlichen Durchf{\"u}hrung der Instandhaltungsmaßnahmen h{\"a}ufig ungeplante Zusatzaufgaben auf, die den Arbeitsablauf in den Instandhaltungswerkst{\"a}tten st{\"o}ren und sowohl die wirtschaftliche als auch die betriebliche Effizienz beeintr{\"a}chtigen. Es hat sich gezeigt, dass solche St{\"o}rungen h{\"a}ufig zu erh{\"o}hten Instandhaltungskosten, l{\"a}ngeren Durchlaufzeiten und einer verminderten Anlageneffizienz f{\"u}hren. Daher besteht ein wachsender Bedarf, bei der Instandhaltungsplanung und -steuerung im {\"o}ffentlichen Verkehrssektor von statischen zu dynamischeren, datengesteuerten Ans{\"a}tzen {\"u}berzugehen. K{\"u}nstliche Intelligenz (KI) bietet in dieser Hinsicht ein erhebliches Potenzial, da sie die Entwicklung von Vorhersagef{\"a}higkeiten, dynamischer Planung und intelligenter Ressourcenzuweisung erleichtert. Zu diesem Zweck werden in dieser Studie bestehende Forschungsarbeiten zu KI Ans{\"a}tzen f{\"u}r die Wartungsplanung und -steuerung in diesen Bereichen des {\"o}ffentlichen Verkehrs systematisch untersucht und bewertet. Anhand einer deskriptiven Analyse werden neue Forschungstrends vorgestellt, w{\"a}hrend eine detaillierte Inhaltsanalyse die Ergebnisse der relevantesten Artikel in diesem Bereich zusammenfasst. Die Analyseergebnisse zeigen, dass sich die meisten Forschungsarbeiten isoliert auf bestimmte Aspekte wie die Vorhersage der verbleibenden Nutzungsdauer und die Fehlerdiagnose konzentrieren. In der Praxis umfasst die Wartungsplanung und -steuerung jedoch eine komplexe Koordination vieler Aktivit{\"a}ten (z B Inspektion, Ressourcenzuweisung und Personal und Aufgabenplanung usw.). Daher sind die Autoren der Ansicht, dass noch holistischere L{\"o}sungen erforderlich sind, die Instandhaltungsaktivit{\"a}ten und Werkstattbeschr{\"a}nkungen integrieren und {\"u}ber Einzelkomponentenvorhersagen hinaus zu einer Optimierung der Instandhaltung auf Systemebene f{\"u}hren, die in realen Instandhaltungsbetrieben validiert werden kann. Dar{\"u}ber hinaus wird in diesem Studienbericht ein konzeptioneller Rahmen vorgestellt der die Planung und Steuerung von Instandhaltungsauftr{\"a}gen in Instandhaltungswerkst{\"a}tten des {\"o}ffentlichen Nahverkehrs verbessern soll. Der vorgeschlagene Rahmen dient als Grundmodell f{\"u}r den Einsatz von KI Technologien zur Reduzierung von Ineffizienzen, zur Verbesserung der Terminplanung und letztlich zur Unterst{\"u}tzung einer zeitnahen und kosteneffizienten Instandhaltungsplanung und -steuerung f{\"u}r Z{\"u}ge.}, subject = {Instandhaltungsplanung; KI; Instandhaltungssteuerung; Maintenance planning; AI; Maintenance control; Public transportation; {\"O}ffentliche Verkehrsmittel; {\"O}ffentlicher Verkehr; Instandhaltungsplanung; K{\"u}nstliche Intelligenz}, language = {de} } @book{OPUS4-6815, title = {Scents of Place : the significance of odours in the experience of heritage}, editor = {Skedzuhn-Safir, Alexandra}, isbn = {978-3-940471-79-6}, doi = {10.26127/BTUOpen-6815}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-68154}, publisher = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Odours play an essential role in our everyday lives. The sense of smell is vital for self-preservation, particularly in detecting potential threats. In the discourse of cultural heritage, the significance of odours is a research topic that is increasingly coming into focus. Odours determine the character of people, spaces, and places, but due to their ephemeral nature, they are more elusive and transitory than any cues or information resulting from vision or touch. Therefore, particular assessment methods, such as so-called smellscapes, will be required to analyse and assess them. Even if the cultural significance of odours is subjective and culturally determined and cannot be inherently charged with significance, their meaning is connected to individual or collective memory and identity. The meaning of odours is explored in places that vary in scale, from private homes to schools, subway stations, and urban quarters, and that can be found in different cities in and outside of Europe.}, subject = {Cultural heritage; Smellscape; Odours; Identity; Cultural significance; Kulturelles Erbe; Geruchslandschaft; Ger{\"u}che; Identit{\"a}t; Kulturelle Bedeutung; Kulturerbe; Bedeutung; Geruchswahrnehmung; Bewertungssystem; Identit{\"a}t; Erleben}, language = {en} } @phdthesis{Dieterle2025, author = {Dieterle, Ann-Kathrin}, title = {The role of inter-organizational cooperation for resilience : an analysis of organizational processes, strategies, practices, and sources}, doi = {10.26127/BTUOpen-7157}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71571}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {This dissertation examines the influences of inter-organizational cooperation on resilience and its implementation. Recent events like the COVID-19 pandemic and the Russia-Ukraine war have underscored the importance of organizational resilience. Yet there is still a need in organizational resilience research for multifaceted and empirical studies on the relationships between the resilience process, resilience capabilities and resources, other related sources of resilience, and the various resilience outcomes. In particular, research on the proactive phase of the resilience process - also known as strategic resilience - is still in its early stages. Inter-organizational cooperation, which spans multiple levels of analysis, offers a promising approach to filling these gaps, even though its role for resilience remains underexplored. Furthermore, from a practical perspective, it is known that firms form alliances in times of crisis as well as innovation-related partnerships during renewal processes. To address these issues and to provide a holistic and interdisciplinary approach for explaining the building and implementation of resilience, this thesis employed both theoretical and practical methods within its research design. It begins with a narrative literature review that conceptualizes inter-organizational resilience as outlined in the first publication, drawing on interdisciplinary scientific scholars. This is followed by a desk research method in the second publication, to deepen the understanding and practical relevance of aforementioned conceptualizations. Furthermore, this thesis examined the subject through case studies, including 22 in-depth narrative interviews and various secondary data sources, with two different foci in the third and fourth publications. The findings contribute to resilience research by developing a conceptual multi-level resilience framework that illustrates the dynamics of inter-organizational cooperation across the phases of anticipation, coping, and adaptation, highlighting the importance of capabilities and resources as key resilience sources. Second, it identifies interorganizational cooperation as a crucial strategy during crises, highlighting specific outcome trajectories. Third, it links proactive resilience to a holistic innovation strategy mix, showing how inter-organizational diversity, intra-organizational participation, and integrative learning processes contribute to building proactive resilience resources and capabilities. Fourth, the thesis demonstrates how cooperation projects between established firms and start-ups are implemented as practical measures to enhance proactive resilience, emphasizing the critical role of relationship quality. Collectively, these contributions provided insights into how inter-organizational cooperation strengthens resilience processes, capabilities, and resources, offering strategies and practices for achieving resilience outcomes.}, subject = {Organizational resilience; Inter-organizational cooperation; Resilience capabilities; Innovation strategy; Organisationale Resilienz; Organisations{\"u}bergreifende Zusammenarbeit; Resilienzf{\"a}higkeiten; Innovationsstrategie; Organisationsentwicklung; Resilienz; Kooperation; Innovation}, language = {en} } @misc{OPUS4-7091, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,32 (01.10.2025)}, doi = {10.26127/BTUOpen-7091}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70914}, year = {2025}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Pflegewissenschaft (B.Sc.) vom 01. Oktober 2025}, language = {de} } @phdthesis{Manhique2025, author = {Manhique, Henrique Andr{\´e}}, title = {Economic analysis of multifunctional fruit production landscapes to promote biodiversity conservation and ecosystem services}, doi = {10.26127/BTUOpen-7166}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71664}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Anthropogenic activities, such as economic development and population growth, drive the conversion of natural habitats into agricultural land and intensify existing fields, causing biodiversity loss and degradation of ecosystem services (ES) vital to agriculture and society. Integrating natural and semi-natural habitats (landscape features) within agricultural landscapes can mitigate these impacts by promoting biodiversity and enhancing ES like pest control and pollination, which reduce pesticide use and bee-hive rental costs, benefiting both farmers and the environment. Despite strong ecological evidence, economic studies on landscape features are scarce but vital for assessing their costs and benefits to farmers and society, thus informing governance and public support for funding implementations. This thesis addresses this gap by economically evaluating specific landscape features and governance structures for biodiversity conservation and ES provision in orchards in a developing country (South Africa) and a developed country (Germany). The first case study uses a discrete choice experiment (DCE) survey to elicit preferences for biodiversity and ES enhancement measures and fund management organisations in South Africa's Cape Floristic Region. The second case study employs a DCE to explore preferences for ES measures and governance enforcement in German apple orchards. The third case study analyses costs and benefits of landscape features under conventional and organic management in German commercial apple orchards. Findings indicate support for biodiversity and ES promotion in both contexts. South African respondents prefer landscape features conserving endangered species over ES provision, while German respondents favour features delivering cultural alongside provisioning and regulating ES. Governance preferences reveal support for private institutions managing biodiversity funds in South Africa, and for multi-actor governance enforcing compliance in Germany. Cost-benefit analysis shows a wide gap between private and social net benefits, with significant societal gains but limited or negative private returns depending on management, highlighting the need for incentives like agri-environment schemes. Policy recommendations focus on designing such incentives, emphasising governance and targeted biodiversity and ES measures to bridge private-social interests and support landscape feature adoption.}, subject = {Flower strips; Hedgerows; Institutional distrust; Net present value; Political orientation; Bl{\"u}hstreifen; Hecken; Institutionelles Missvertrauen; Kapitalwert; Politische Orientierung; Deutschland; S{\"u}dafrika; Biodiversit{\"a}t; {\"O}kosystemdienstleistung; Obstanlage; Organisationsmodell; Anreizsystem}, language = {en} } @phdthesis{Beyers2025, author = {Beyers, Lydia}, title = {Landesgesetzliche PV-Pflichten f{\"u}r Bestandsbauten : Rechtsvergleich, beh{\"o}rdliche Herausforderungen und Handlungsempfehlungen}, doi = {10.26127/BTUOpen-7158}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71589}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Die Notwendigkeit drastischer klimaschutzwirksamer Maßnahmen erfordert eine baldige Energiewende. Reichen die freiwilligen Installationen von Photovoltaikanlagen (PV-Anlage) nicht aus, um die erforderlichen Zubauraten an erneuerbaren Energien zu erreichen, m{\"u}ssen auch Privatpersonen in die Pflicht genommen werden. Hierf{\"u}r haben einige Bundesl{\"a}nder eine PV-Installationspflicht erlassen. Eine besondere Bedeutung liegt hierbei im Geb{\"a}udebestand. Dieser steht in einigen Bundesl{\"a}ndern bereits bei einer Dachsanierung in der Verpflichtung, PV-Module zu installieren. Im Zuge der Fragestellung: „Inwieweit sind die landesgesetzlichen PV-Pflichten f{\"u}r Bestandsbauten in Bezug auf die beh{\"o}rdliche Um- und Durchsetzung praxistauglich gestaltet?" wurden Herausforderungen in der {\"U}berf{\"u}hrung der PV-Pflicht in die Praxis untersucht. Mit Hilfe einer Rechtsvergleichung wurden die gesetzlichen Bestimmungen der Bundesl{\"a}nder Baden-W{\"u}rttemberg, Bayern, Berlin, Brandenburg, Bremen, Hamburg, Nordrhein-Westfalen und Schleswig-Holstein analysiert. Interviews mit Experten und Expertinnen aus den Bauaufsichtsbeh{\"o}rden gaben R{\"u}ckschl{\"u}sse auf bestehende Missst{\"a}nde der beh{\"o}rdlichen Um- und Durchsetzung. Die generierten Erkenntnisse wurden in Handlungsbedarfe und -empfehlungen f{\"u}r die Gesetzgeber der L{\"a}nder {\"u}bertragen. Die Untersuchung zeigt erhebliche L{\"u}cken in der gesetzlichen Klarheit und Umsetzbarkeit der Verpflichtungen. Eine Kontrolle der Einhaltung durch die zust{\"a}ndige Beh{\"o}rde ist auf Grund der Anlagenanforderungen und der einzureichenden Unterlagen nicht leistbar bzw. nicht m{\"o}glich. In vielen F{\"a}llen sind Sanierungen verfahrensfrei, sodass die Baubeh{\"o}rden keine Kenntnis dar{\"u}ber erhalten. In Hamburg ist die beh{\"o}rdliche Zust{\"a}ndigkeit zudem ungekl{\"a}rt. F{\"u}r eine wirksame PV-Pflicht muss die Durchf{\"u}hrung daher m{\"o}glichst unkompliziert und {\"u}berpr{\"u}fbar gestaltet werden. Eine M{\"o}glichkeit besteht in der Vereinfachung der Anlagenanforderung, etwa durch die Festlegung auf eine zu installierende Leistung der Anlage, was die Dimensionierung erleichtern w{\"u}rde. Die Einhaltung kann hier mit einfachen Nachweisen kontrolliert werden. Einen potenziell gr{\"o}ßeren Einfluss auf die Energiewende liegt in der Bemessung anhand der solargeeigneten Dachfl{\"a}che. In Verbindung mit dem Online-Tool des Solardachkataster kann eine anteilige Belegung ermittelt und entsprechende Nachweise zur Vorlage bei der Beh{\"o}rde generiert werden. Nachweise k{\"o}nnten dann {\"u}ber eine digitale Schnittstelle eingereicht und beh{\"o}rdlich kontrolliert werden. Eine unkomplizierte Umsetzung, kombiniert mit beh{\"o}rdlichen Durchsetzungsmaßnahmen, k{\"o}nnte die Akzeptanz der Verpflichtung erh{\"o}hen und einen entscheidenden Beitrag zur Energiewende leisten. Die vorgeschlagenen Maßnahmen bieten hierbei einen konkreten L{\"o}sungsansatz, um die PV-Pflicht praxistauglicher zu gestalten und damit den Ausbau der erneuerbaren Energien im Geb{\"a}udebestand voranzutreiben.}, subject = {Solarpflicht; Photovoltaikpflicht; Verwaltungsrecht und Vollzug; Energie- und Klimaschutzrecht; Kontrolldefizite; Energy and administrative law; Control deficit; Photovoltaic obligation; Solar mandate; Enforcement; Deutschland; Klimaschutzrecht; Energierecht; Fotovoltaikanlage; Rechtsvergleich; Bundesland; Verwaltungsrecht}, language = {de} } @phdthesis{Oprei2025, author = {Oprei, Anna}, title = {Auswirkungen der h{\"a}ufigen Sedimentumlagerung auf Struktur und Funktion sedimentgebundener mikrobieller Gemeinschaften in Tieflandb{\"a}chen}, doi = {10.26127/BTUOpen-7124}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71242}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Sandy sediments are transported at low flow in so called migrating ripples. Migrating ripples are triangular bedforms with a flat upstream (stoss) and a steep downstream face (lee). Sediment grains are eroded on the stoss side of the ripple and deposited on the lee side of the ripple. They are buried under subsequently falling grains and rest until the next erosion cycle begins. During ripple migration, biofilms associated to sediment grains undergo frequent moving-resting cycles, and are exposed to abrasion and scour as a result of colliding grains during the moving phase, and to light limitation during the resting phase. These specific environmental conditions suggest that high frequent sediment shifting in migrating ripples affects the function and structure of benthic communities with profound consequences on ecological dynamics and biogeochemical processes. This thesis aimed to 1) shed light on the understudied effects of high frequent sediment shifting in migrating ripples on benthic microbial communities, and 2) unravel how legacy effects interact with the response of microbial communities towards high frequent sediment shifting in the context of sediment disturbance. To tackle the first research question, I characterized the specific microenvironment in migrating ripples compared to patches of stationary sediment in a field study. The results showed that migrating ripples created streambed heterogeneity by modulating the abundance, diversity, and structure of the microbial community. In a series of two microcosm experiments, it became evident that light oscillation played the pivotal role during high frequent sediment shifting. To answer the second research question, I studied how the microbial community of incoming sediment from bank erosion reacts to ripple migration after transitioning to the aquatic habitat. The results showed that although the terrestrial-aquatic transition had stronger impacts on the microbial community than subsequent sediment transport in migrating ripples, microbial colonization was decelerated under high frequent sediment shifting. A manipulative field study served to investigate the long-term effects of migrating ripples on microbial communities after transitioning to stationary conditions. Whereas heterotrophic activity was restored within a few days, primary productivity was hampered for several months. Conclusively, the findings of this thesis confirm that high frequent sediment shifting at low-flow conditions shapes local and regional biodiversity, meta-community dynamics, and the flow of matter through the benthic food web. I suggest that the current concept of sediment disturbance focusing on catastrophic flood events should be expanded towards sediment transport along a dynamic range of moving-resting frequencies across different spatiotemporal scales.}, subject = {Sediment transport; Migrating bedforms; Microbial metabolism; Ripples; Sedimenttransport; Wandernde Sandrippel; Mikrobieller Stoffwechsel; Biofilm; Stress; Microbial communities; Geomikrobiologie; Mikrobenthos; Mikrobioz{\"o}nose; Sedimenttransport; Sandrippel}, language = {en} } @phdthesis{BatzLineiro2025, author = {Batz Li{\~n}eiro, Taimyra}, title = {Insights into renewable energy support instruments and costs : evidence from German programs}, doi = {10.26127/BTUOpen-7156}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71567}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {This dissertation compiles three research articles that evaluate renewable energy support instruments and estimate the costs of deploying renewable sources at the national level. The research is based on the German experience; however, the findings are relevant to other markets and technologies. The first article examines the German photovoltaic (PV) auction program. Since the main objectives of renewable auctions are project realization and competitive prices, proper evaluation requires estimating realization rates in addition to early indicators such as auctioned capacity and resulting prices. Realization rates were estimated using an innovative approach that merged diverse public databases into a detailed, project-specific dataset. The analysis also considers the impact of developer characteristics on market behaviour and project outcomes, testing hypotheses on the influence of size and experience on bidding strategies and success. Results confirm that the German PV program was effective, with projects largely completed. While auctions helped discover competitive prices, subsidy reductions were mainly driven by falling technology costs. The second article applies the same data-merging algorithm to the German onshore wind auction program. Unlike PV auctions, which emphasized primary objectives, the wind design also sought secondary goals such as actor diversity and regional balance. In addition to realization rates, the study evaluates these goals by examining community energy companies (CECs) and the effect of including a grid expansion area (GEA). Findings show the initial scheme failed to promote wind deployment at competitive prices, while design elements intended to achieve secondary objectives neither met their goals nor prevented larger actors from gaming the system. The third article investigates the broader economic implications of Germany's support mechanisms, focusing on net subsidies under the Renewable Energy Sources Act. It quantifies the aggregated costs of all RES units installed between 2000 and 2021 and projects future payments. The analysis reveals that despite high historical costs, current and future support is declining due to reduced levelized costs of electricity (LCOEs) and higher wholesale prices. The study highlights the central role of wind and solar in cost-effective deployment and recommends policies to enhance the efficiency and effectiveness of future renewable investments.}, subject = {Renewable energy; Policy; Auction; Germany; F{\"o}rderpolitik; Erneuerbare Energie; Ausschreibungen; Deutschland; Deutschland; Erneuerbare Energien; {\"O}ffentliche F{\"o}rderung; {\"O}ffentliche Ausschreibung}, language = {en} } @phdthesis{MbouandiNjiasse2025, author = {Mbouandi Njiasse, Ibrahim}, title = {Stochastic models and optimal control of epidemics under partial information}, doi = {10.26127/BTUOpen-7127}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71272}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {In this thesis, we develop a mathematical framework to estimate the compartment sizes of an epidemic model with some unobserved compartments (i.e., a model with partial information) and formulate a social planner's stochastic optimal control problem for such an epidemic. Including asymptomatic and unreported infectious individuals in the model allows a more realistic description of the course of an epidemic and avoids misleading estimation. In order to estimate the unobservable states, a suitable description of the dynamics of the epidemic progression by a diffusion approximation is achieved using counting processes. The estimation of the unobservable states is attributed to a stochastic filter problem. To solve this problem, we use the extended Kalman filter, which provides approximate solutions for such non-standard filter problems. This approach is applied to the state estimation of a model with incomplete information for a disease with lifelong immunity after recovery or vaccination. Simulations are carried out to demonstrate the effectiveness of this approach in practice. The main part of this work addresses a social planner's stochastic optimal control problem for an epidemic model with a partially observed state process. It decomposes the population into susceptible, detected and non-detected infected, detected and non-detected recovered, and hospitalized individuals. Control measures include social distancing, testing, and vaccination. We apply a filtering argument to transform the partially observable stochastic optimal control problem into a completely observable control problem by replacing the hidden state process with the associated Kalman filter processes. This transformed problem with an eight-dimensional state process is treated as a Markov decision process after a time discretization. The associated Bellman equation is solved numerically using a backward recursion algorithm combined with state discretization and quantization techniques to mitigate the curse of dimensionality. In particular, two approaches are implemented. The first involves state discretization and linear interpolation of the value function between grid points, while the second utilizes state discretization and parameterization of the value function with educated ansatz functions. Extensive numerical experiments are presented to demonstrate the effectiveness of both approximate optimal controls in containing the epidemic. Finally, we generalize the results of Picard (1991) on the efficiency of the continuous-time extended Kalman filter with small noise scaled by a parameter ε>0. First, we show that when the observation drift coefficient is strongly injective and the signal and observation drift become linear for ε → 0, the estimation error is of order √ε. Subsequently, we establish conditions under which the error in the initial filter estimate decays exponentially fast.}, subject = {Compartmental model; Partial information; Extended Kalman filter; Stochastic optimal control; Dynamic programming; Kompartimentmodell; Teilinformationen; Erweiterter Kalman-Filter; Stochastische optimale Steuerung; Dynamische Programmierung; Dynamische Optimierung; Kompartimentmodell; Kalman-Filter; Stochastische optimale Kontrolle}, language = {en} } @phdthesis{Moebius2025, author = {M{\"o}bius, Thomas}, title = {Modelling uncertainty and risk preferences in European electricity markets, and the prediction of wholesale electricity prices}, doi = {10.26127/BTUOpen-7138}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71388}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {This dissertation is a compilation of five self-contained research articles that explore two key topics in energy economics. The first two articles focus on modelling uncertainties in energy systems, whereas the remaining three articles deal with electricity price forecasting. The first article develops an integrated European electricity and natural gas market model to examine the effects of uncertainty on both markets. The model is formulated as a stochastic optimisation problem and takes into account five key uncertainty factors: gas and electricity demand, installed renewable energy capacity, and fuel and CO2 prices. The result is the value of incorporating uncertainty as part of an energy system model. The second article examines the interactions between flexibility and investment risk in European electricity markets, focusing on the investment strategies of risk-averse decision-makers, taking into account various flexibility options. To this end, a stochastic investment model for the expansion of transmission and generation capacities in the European electricity system is developed, which takes into account the risk preferences of decision-makers through the implementation of conditional value at risk. The third article evaluates the impact of data pre-processing on the performance of energy system models. Motivated by the bias and inaccuracy of the day-ahead load forecasts from transmission system operators, this article first develops a time series model that improves the accuracy of load forecasts. The improved data is then implemented in an energy system model with the aim of testing the influence of data quality on the model results. The fourth article develops a hybrid model that combines a techno-economic energy system model with statistical models for electricity price forecasting, leveraging their respective advantages. The techno-economic energy system model provides an in-depth understanding of market mechanisms, while the stochastic models takes into account non-technical factors such as the expectations and speculative behaviour of market participants by interpreting prices. The fifth article combines an energy system model with various econometric models for electricity price forecasting in the day-ahead market. To this end, a price estimator derived from the energy system model is integrated as an exogenous variable into statistical and machine learning approaches. The results show that integrating this market clearing price into econometric models significantly improves forecast accuracy.}, subject = {Energy system modelling; Risk aversion; Uncertainty; Electricity price forecasting; Energiesystemmodellierung; Unsicherheit in Energiesystemen; Risikoaversion; Strompreisprognosen; Energiewirtschaft; Elektrisches Energiesystem; Modellierung; Unsicherheit; Risikoverhalten; Prognose; Strompreis}, language = {en} } @phdthesis{Extra2024, author = {Extra, Simon Karl}, title = {Ein Beitrag zur ganzheitlichen Optimierung in der Kerntriebwerksvorauslegung}, doi = {10.26127/BTUOpen-7145}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71459}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Die etablierte Methode der Kerntriebwerksvorauslegung, die den Pfad immer gr{\"o}ßerer Komplexit{\"a}t und Abbildungsgenauigkeit bei abnehmender Abstimmung und Interaktion zwischen den Komponenten des Kerntriebwerks beschreitet, kann eine Systemverbesserung nicht zuverl{\"a}ssig herbeif{\"u}hren. Dabei beginnt die Betrachtung des zu entwerfenden Triebwerks mit einer Gesamtbetrachtung und wird anschließend an weitgehend getrennte Expertengruppen {\"u}bergeben. In diesen wird dann mit Auslegungswerkzeugen steigenden Detailgrads von analytischen Rechnungen mit empirischer Unterst{\"u}tzung {\"u}ber Stromlinienkr{\"u}mmungsverfahren hin zu 3D-CFD-Methoden der Entwurf durchgef{\"u}hrt. Das Ziel dieser Arbeit ist es, den Entwurfsprozess f{\"u}r das Kerntriebwerk weg von einer Optimierung einzelner Komponenten mit detaillierten Methoden hin zu einer ganzheitlichen Betrachtung der Qualit{\"a}t des Entwurfs zu f{\"u}hren. Dies {\"u}berwindet die oben beschriebenen Einschr{\"a}nkungen in der Auslegung und ist trotzdem in der Lage, auf bestehende validierte Analysewerkzeuge zur{\"u}ckzugreifen. Dazu werden die daf{\"u}r genutzten Kopplungsstrategien einer vergleichenden Untersuchung mithilfe eines analytischen Kerntriebwerksmodells unterzogen. Dabei wird die Wichtigkeit einer leistungsf{\"a}higen Kopplungsstrategie in Verbindung mit einem passenden Optimierungsalgorithmus dargestellt. Dies f{\"u}hrt nicht nur zu einer Verbesserung der Ergebnisqualit{\"a}t, sondern erm{\"o}glicht oftmals erst den Einsatz kooperativer Methoden. Ein Verfahren mit stochastischem Sampling und der Nutzung von Antwortfl{\"a}chen wird in diesem Kontext erl{\"a}utert und weiterentwickelt. Den Schnittstellen zwischen den Komponenten und ihrer Definition, Abbildung und Beeinflussung durch das Optimierungsverfahren kommt dabei entscheidende Bedeutung zu. Auf Basis dieses Vergleichs werden auf industriellen Methoden basierende Komponentenprozesse f{\"u}r die Analyse und Optimierung von Verdichter, Brennkammer und Turbine auf ihre Eignung im Rahmen einer ganzheitlichen Optimierung hin zun{\"a}chst untersucht und dann angepasst. Die evaluierten Kopplungsstrategien und die angepassten Komponentenoptimierungsprozesse werden in einen Systemoptimierungsprozess {\"u}berf{\"u}hrt. Dazu wird die gew{\"a}hlte Kopplungsstrategie hierf{\"u}r angepasst und demonstriert nach der Optimierung eine Verbesserung hinsichtlich der Systemzielfunktion, wodurch die Anwendbarkeit von kooperativen Auslegungsmethoden im industriellen Kontext gezeigt wird.}, subject = {Luftfahrtantriebe; Kerntriebwerk; Antwortfl{\"a}chen; Vorauslegung; Kopplungsstrategien; Aero engines; Core engine; Response surfaces; Pre-design; Coupling methods; Flugtriebwerk; Entwurf; Optimierung; Komplexes System; Bemessung}, language = {de} } @misc{OPUS4-7090, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,31 (01.09.2025)}, doi = {10.26127/BTUOpen-7090}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70904}, year = {2025}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den weiterbildenden Master-Studiengang Public Administration (M.P.A.) vom 01. September 2025}, language = {de} } @misc{OPUS4-7055, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,30 (29.08.2025)}, doi = {10.26127/BTUOpen-7055}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70559}, year = {2025}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Mathematics vom 29. August 2025}, language = {de} } @misc{OPUS4-7054, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,29 (29.08.2025)}, doi = {10.26127/BTUOpen-7054}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70544}, year = {2025}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Mathematical Data Science vom 29. August 2025}, language = {de} } @phdthesis{Lutfi2025, author = {Lutfi, Helana Saad Khalid}, title = {The impact of artificial intelligence applications on users' behaviour in the medical sector}, doi = {10.26127/BTUOpen-7073}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70733}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Negative gesellschaftliche Folgen der k{\"u}nstlichen Intelligenz (KI) resultieren aus dem Vertrauensverlust der Menschen in KI-Anwendungen im Gesundheitswesen. Es ist von entscheidender Bedeutung, das Potenzial der k{\"u}nstlichen Intelligenz zur Verbesserung der Gesundheitsergebnisse der Nutzer zu verstehen. Dies umfasst die zeitliche Optimierung der Diagnose, die Bereitstellung personalisierter Gesundheitsversorgung und die Bewertung von Prognosen in Gesundheitssystemen. Das {\"u}bergeordnete Ziel dieser Doktorarbeit besteht darin, den Einfluss der k{\"u}nstlichen Intelligenz auf das Nutzerverhalten im medizinischen Kontext zu untersuchen. Diese Arbeit setzt sich aus vier Publikationen und einem Publikationsmanuskript zusammen. Die erste Publikation bietet einen {\"U}berblick {\"u}ber den Einsatz von k{\"u}nstlicher Intelligenz bei der Bereitstellung von Gesundheitsdienstleistungen und deren Auswirkungen auf das Verhalten und die Perspektiven der Nutzer. Die zweite Publikation skizziert eine Vision f{\"u}r nachhaltige Innovationen, indem sie die Schl{\"u}sselkomponenten der Nachhaltigkeit hervorhebt und ihre positiven Effekte auf das Gesundheitssystem beleuchtet. In der dritten Ver{\"o}ffentlichung werden die Auswirkungen digitaler Gesundheitsl{\"o}sungen auf die Einstellung und Perspektiven der Nutzer hinsichtlich der Akzeptanz digitaler Gesundheitstechnologien aufgezeigt. Das vierte Publikationsmanuskript schl{\"a}gt die Anwendung eines maschinellen Random-Forest-Lernmodells zur Vorhersage zuk{\"u}nftiger Herzfrequenzschwankungen {\"u}ber einen Zeitraum von 10 Tagen vor. Die f{\"u}nfte Publikation ist eine Folgestudie, die die Entwicklung und Implementierung einer webbasierten Anwendung namens HRpredict vorstellt. Die Ergebnisse zeigen, dass k{\"u}nstliche Intelligenz eine positive Auswirkung auf die Gesundheitsversorgung hat. Vertrauen der Nutzer und ihre Zufriedenheit mit dem Einsatz von k{\"u}nstlicher Intelligenz im Gesundheitswesen werden durch funktionale Interaktionen mit den Endnutzern beeinflusst.}, subject = {K{\"u}nstliche Intelligenz; Gesundheitswesen; Personalisierte Medizin; Vertrauen; Nutzerverhalten; Artificial intelligence; Healthcare; Personalised medicine; Trust; User behaviour; Gesundheitswesen; K{\"u}nstliche Intelligenz; Benutzerverhalten; Individualisierte Medizin; Random Forest; Public health; Artificial hntelligence}, language = {en} } @misc{Doku2025, type = {Master Thesis}, author = {Doku, Philip Laryea}, title = {Investigation of the distinguishability of Giraud-Verneuil atomic blocks}, doi = {10.26127/BTUOpen-7140}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71404}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {In this work, we investigate the security of Elliptic Curve Cryptosystem (ECC) implementations against Side-Channel Analysis (SCA). ECC is well known for both its efficiency and strong security. However, it is also vulnerable to SCA. SCA exploits physical information leaked during the execution of the scalar multiplication (kP) operations. Countermeasures like regularity and atomicity have been developed against such attacks. This thesis, however, focuses on atomicity as a countermeasure. In this work, we focused on the atomic pattern proposed by Giraud and Verneuil used in the scalar multiplication operation. We implemented their atomic pattern using the right-to-left scalar multiplication algorithm on the P-256 elliptic curve, recommended by NIST. Our implementation was done using the FLECC cryptographic library, which supports constant-time operations, and it was executed on the Texas Instruments (TI) LAUNCHXLF28379D development board. We measured and collected the Electromagnetic (EM) emissions generated during the execution of the kP operation using measurement tools such as the Lecroy WavePro 604HD Oscilloscope, the Langer ICS 105 Integrated Circuit Scanner, and the Langer MFA-R 0.2-75 Near Field Probe. Our analysis focused on whether the Giraud and Verneuil atomic blocks could be distinguished based on their electromagnetic trace. We identified that when additionally inserted clock cycle processes were present in the execution, the atomic blocks could be visually distinguished from each other. However, after removing these processes, the atomic blocks became more synchronised and harder to distinguish, which reduced the risk of a successful SCA attack. These findings suggest that, although the atomic pattern was implemented correctly with dummy operations, its resistance to SCA can still be affected by the additional processes that are inserted on the hardware or software level. This means that atomicity alone as a countermeasure might not be enough to fully protect ECC implementations against SCA attacks. More research is required to investigate the reasons for the additionally inserted clock cycle processes that caused the distinguishability in the atomic blocks and also how intermediate operations are addressed in memory registers. This will help to better understand the processes that lead to the insertion of these additional clock cycles. This thesis is the first to experimentally implement and investigate Giraud and Verneuil's atomic pattern on hardware and offer useful results that can be used to improve countermeasures against SCA.}, subject = {Side Channel Analysis; Elliptic Curve Cryptosystem; Atomicity; Scalar Multiplication kP; FLECC; Kryptosystem; Elliptische Kurve; Seitenkanalattacke; Atomizit{\"a}t; Implementierung ; Elliptische-Kurven-Kryptosysteme; Seitenkanalanalyse; Skalarmultiplikation kP; Horizontale Seitenkanalangriffe; Atomare Bl{\"o}cke}, language = {en} } @phdthesis{Kared2025, author = {Kared, Trusha}, title = {Mathematical analysis, design, and validation of a high dynamic range, low noise differential mixer using SiGe microwave transistors}, doi = {10.26127/BTUOpen-7121}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71216}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The limits imposed by the wireless environment require the designer to consider noise, linearity, and power consumption. Bipolar technology has been the most appealing silicon technology due to its high-speed performance and well-engineered base parasitics. Its high transition frequency and low base resistance have resulted in remarkable noise performance. These advantages, combined with scaling flexibility, have made bipolar devices the fundamental component of silicon RF front-ends. With the growing demand for high-performance wireless applications from satellite and radar systems to 5G infrastructure, there is a strong need for advanced mixer architectures that can deliver high isolation, gain, and low noise across wide frequency ranges. The purpose of this dissertation was to describe the differential mixer and its mathematical properties in terms of gain and noise figure, and to explore further optimizations. In fact, it turned out that the mixer design was greatly improved in terms of both the noise figure and the intercept point. The active double-balanced down-conversion mixer is built on SiGe technology. The circuit exhibits significant improvement in terms of the mixer's other performance parameter metrics. This dissertation presents a novel SiGe HBT-based differential double-balanced down-conversion mixer featuring significantly enhanced conversion gain, noise performance, linearity, dynamic range, and port-to-port isolation. Compared to existing designs, this mixer delivers outstanding performance, achieving a single-sideband (SSB) noise figure of 7 dB ± 0.4 dB, a conversion gain of 12 dB ± 1 dB, and exceptional isolation metrics RF-to-IF isolation greater than 35 dB, with LO-to-RF and LO-to-IF isolation exceeding 50 dB across the 0.5 GHz to 1.8 GHz frequency range. Furthermore, it has an Input third-order intercept point (IP3) of +4.7 dBm, an output third-order intercept point (OIP3) of +15 dBm, and a 1 dB compression point of -8 dBm. This high-performance down-conversion double-balanced mixer integrates several state-of-the-art innovations. A transformer-free single-ended-to-differential conversion enhances efficiency and eliminates unnecessary components at the RF stage. The dual-feedback linearization technique optimizes impedance matching while suppressing nonlinear distortion, ensuring superior linearity. Additionally, symmetrical active device layout and advanced multilayer PCB technology significantly mitigate LO-to-RF feedthrough, reducing crosstalk and maximizing port-to-port isolation. These advancements collectively result in a highly efficient, low-noise, and exceptionally linear mixer architecture, setting a new benchmark in SiGe HBT-based mixer technology rather than relying on noisy CMOS technology. Due to its higher fabrication complexity, lower yield at advanced nodes, and the necessity for more complicated design tactics in high-frequency applications, CMOS technology in small quantities is ultimately more costly than SiGe HBT-based designs. Although CMOS excels in low-power applications and large-scale digital integration, SiGe HBT remains a reasonably affordable option for high-performance RF}, subject = {Down-conversion double balanced mixer; Noise figure; Dynamic range; Marchand balun; LO mixing core; Doppelt balancierter Abw{\"a}rtsmischer; Rauschmaß; Dynamikbereich; Marchand-Balun; LO-Mischkern; Heterobipolartransistor; Siliciumhalbleiter; Germaniumlegierung; Mischer ; Rauschmessung}, language = {en} } @misc{OPUS4-7053, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,28 (21.08.2025)}, doi = {10.26127/BTUOpen-7053}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70536}, year = {2025}, abstract = {Bekanntmachung {\"u}ber die Aufhebung des Master-Studienganges Verarbeitungstechnologien der Werkstoffe (M.Sc.)}, language = {de} } @techreport{SchrothDraegerGabrieletal.2025, author = {Schroth, Jil and Draeger, Susan and Gabriel, Janika and Santucci, Daniele}, title = {Hitze in der Stadt : eine sozial-r{\"a}umlich differenzierte Analyse f{\"u}r Klimaanpassungsmaßnahmen aus Sicht der Stadtnutzenden in Berlin}, doi = {10.26127/BTUOpen-7149}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71491}, year = {2025}, abstract = {Infolge des Klimawandels treten in Deutschland zunehmend extreme Wetterereignisse auf. Besonders Hitzewellen in St{\"a}dten stellen eine wachsende Belastung dar, da sich hier der st{\"a}dtische W{\"a}rmeinseleffekt mit einer hohen baulichen Dichte {\"u}berlagert. Diese Entwicklung hat direkte Auswirkungen auf das thermische Empfinden und die Gesundheit, insbesondere bei vulnerablen Gruppen wie {\"a}lteren Menschen, Personen mit Vorerkrankungen oder Kindern. W{\"a}hrend bisherige Forschung vor allem technische und planerische Anpassungsmaßnahmen betrachtet, fehlt es an fundierten sozialwissenschaftlichen Perspektiven. Das Forschungsprojekt „Hitze in der Stadt" schließt diese L{\"u}cke, indem es die Beziehung zwischen der gebauten Umwelt, mikroklimatischen Bedingungen und der subjektiven thermischen Wahrnehmung untersucht. Als Fallbeispiel diente ein dicht bebautes Berliner Gr{\"u}nderzeitquartier mit geschlossener Blockrandbebauung und vielf{\"a}ltigen Nutzungen, das eine hohe {\"U}bertragbarkeit auf andere europ{\"a}ische St{\"a}dte aufweist. Die methodische Vorgehensweise umfasste drei zentrale Bausteine: 1. Raumtypisierung - Das Untersuchungsgebiet wurde in sieben repr{\"a}sentative Stadtraumtypen unterteilt (z. B. breite Hauptstraße, enge Gasse, Brunnenplatz im Park), um systematische Vergleiche zu erm{\"o}glichen. 2. Gef{\"u}hrte Climate Walks mit integrierten mikroklimatischen Messungen - Zwei Gruppen, {\"a}ltere Stadtnutzende (≥ 65 Jahre) und eine j{\"u}ngere Vergleichsgruppe, durchquerten w{\"a}hrend sommerlicher Mittagshitze die definierten Raumtypen. In Echtzeit bewerteten sie ihre thermische Wahrnehmung und Aufenthaltsqualit{\"a}t. Parallel dazu wurden vor Ort Temperatur, Luftfeuchte, Windgeschwindigkeit, Strahlung und Oberfl{\"a}chentemperaturen (W{\"a}rmebild) gemessen und GPS-basiert verortet. Der Universal Thermal Climate Index (UTCI) diente als Referenz zur Bewertung der thermischen Belastung. 3. Fokusgruppen - In moderierten Diskussionen wurden die subjektiven Eindr{\"u}cke vertieft, Einflussfaktoren herausgearbeitet und Bedarfe an die Außenraumgestaltung identifiziert. Die Ergebnisse zeigen: Hitzestress wird nicht allein durch Temperatur bestimmt. Faktoren wie Begr{\"u}nung, Verschattung, L{\"a}rmpegel, Sauberkeit, Nutzungsart, Erwartung und Atmosph{\"a}re beeinflussen die Wahrnehmung erheblich. Begr{\"u}nte, ruhige und saubere Orte mit Sitzgelegenheiten wurden auch bei hohen Temperaturen als deutlich angenehmer erlebt, w{\"a}hrend stark versiegelte, verkehrsbelastete Fl{\"a}chen als besonders belastend galten - exemplarisch am Rosenthaler Platz. Aus der Analyse wurden sechs zentrale Handlungsempfehlungen abgeleitet: (1) Aufenthaltsqualit{\"a}t als festen Bestandteil in Klimaanpassungsstrategien integrieren, (2) Belastungsfaktoren wie L{\"a}rm und Verkehr reduzieren, (3) Maßnahmen differenziert nach Raumtyp und Nutzung entwickeln, (4) {\"o}ffentliche Wartezonen gezielt verbessern, (5) „k{\"u}hle Wege" zwischen wichtigen Zielen f{\"o}rdern, (6) geschlechter- und bildungssensible Ans{\"a}tze in Planung und Kommunikation ber{\"u}cksichtigen. Das Projekt macht deutlich, dass effektive urbane Hitzestrategien nur durch interdisziplin{\"a}re Ans{\"a}tze entstehen, die technische, gestalterische und soziale Dimensionen gleichwertig verbinden - mit dem Ziel einer klimaresilienten und sozial gerechten Stadtentwicklung.}, subject = {Urban heat island effect; Urban climate; Climate change; Heatstress; Climate adaption; W{\"a}rmeinseleffekt; Stadtklima; Klimawandel; Hitzestress; Klima{\"a}nderung; Berlin; Stadtsoziologie; Stadtleben; Stadtklima; Stadtplanung; W{\"a}rmeinsel; Klima{\"a}nderung; Hitzebelastung}, language = {de} } @phdthesis{Neisen2025, author = {Neisen, Martin}, title = {The impact of prudential regulation, digitalisation, and ESG on the performance of banks' business models in Europe}, doi = {10.26127/BTUOpen-7139}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71398}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Banks' business models and performance are heavily influenced by the trends of prudential regulation, digitalisation and Environmental, Social and Governance (ESG) factors. The aim of this research is to analyse how and to what extent these three major trends in the banking industry influence the performance of the business models of European banks. The main research question is whether these trends improve or deteriorate the performance of banks' business models. The research question is divided into three sub-research questions, each focusing on one of the major trends and its impact on banks' business models. The methodology of this research is based on the cumulative approach, which consists of presenting a set of five papers that have been published in reputable journals in the field of banking and finance. Each paper focuses on a specific aspect of the research question. As trends in the banking industry are not a measurable variable, they are defined for the purpose of answering the research question as constructs that can be made measurable using the variable risk-weighted assets. Each of the used papers cover a separate problem for the banking industry. The first paper analyses regulatory changes in the wake of the COVID pandemic. The second paper covers the impact of the output floor on the performance of banks' business models. The third paper shows how ESG Ratings and additional capital requirements influence the performance of banks' business models. The fourth paper covers the impact of AI in modelling credit risks, and finally, the impact of the EU implementation of Basel IV used. The research results of each paper are used to measure the change in the RWA. In the second step, the change of RWA is used as the independent variable that changes the business model performance. The analysed trends significantly influence the performance of business models but depends on the respective trend and individual case. This research offers a novel viewpoint in the banking literature and a valuable source for both practitioners and academic research. As the banking sector undergoes constant transformation, the insights obtained here emphasise the importance of adeptly managing the interplay of these trends to optimise business model performance. Other researchers can leverage this work as a catalyst for further research into the dynamic interplay between prudential regulation, digitalisation, ESG considerations and bank business model performance. Additionally, the linear association detected between these constructs and bank business model performance as measured by RAROC creates possibilities for quantitative research. This research stimulates further scholarly inquiry on this topic by highlighting the significance of these trends in determining the banking sector's future.}, subject = {Bank business models; Prudential regulation; Digitalisation; ESG risks; AI; Bankenregulierung; Digitalisierung; ESG; Gesch{\"a}ftsmodelle; K{\"u}nstliche Intelligenz; Bank; Regulierung; Digitalisierung; K{\"u}nstliche Intelligenz; Environmental, Social and Governance}, language = {en} } @phdthesis{Kayatz2024, author = {Kayatz, Benjamin}, title = {Supporting accounting and decision-making in agricultural water management under data scarcity : chances, limits and potential improvements}, doi = {10.26127/BTUOpen-7067}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70672}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Alleviating water scarcity and ending hunger are two Sustainable Development Goals that are inextricably linked, as 70\% of water is used for agricultural production. However, assessing and identifying improved water management requires costly field trials or knowledge and data to run agro-hydrological models. This thesis addresses this challenge by integrating an agro-hydrological model with global soil, crop and climate datasets into a user-friendly, web-based agricultural water management assessment tool, the Cool Farm Tool Water (CFTW). This dissertation substantially contributes to the development and assessment of this modelling framework as well as identifies levers to enhance the model performance. Model results were compared to published scientific field trials, eddy covariance observations as well as Water Footprint Network data. Finally, the model framework was applied to five cereals across India between 2005 and 2014, representing a high spatial, inter- and intra-annual heterogeneity. The modelling framework explained 96\% of the variability in seasonal water footprints and reduced the error of water footprints by 70\% compared to state-level averages by the Water Footprint Network. However, CFTW captured only 50\% of the variance in seasonal crop water use. CFTW enables the assessment of the daily dynamics of evapotranspiration, can reproduce daily crop water stress but overestimates irrigation requirements by an average of 40\%. It helps identify relative improvements in agricultural water management but lacks the accuracy for absolute assessments. Using local input data reduced the bias from 18.6\% to 4.3\% for evapotranspiration. While results showed site- and season-specific differences, the greatest model improvement is replacing global precipitation data with local observations, reducing e.g. the bias by 70.6\% for daily water use. Water footprints and water use of India revealed the importance of considering crop-, season-, year- and location-specific differences. Total Rabi (dry season) water footprints were between 33.4\% and 45.0\% lower than Kharif (monsoon) water footprints. However, the Rabi blue water footprints accounted for up to 78.3\%. Overall, India increased cereal production by 26.4\% without utilising additional water resources, mainly through increases in yield, partly by shifting production to the higher-yielding Rabi season. CFTW supports addressing water scarcity and food security at seasonal timescales and, to some extent, at daily timescales. Global datasets combined with an uncalibrated agro-hydrological model can inform improved agricultural water management by providing water footprints, water use and water stress. However, model outcomes also revealed considerable offsets. These results highlight the difficulties of overcoming data scarcity in decision support tools for agricultural water management. The rapid development of global datasets may help to overcome identified limitations in the future.}, subject = {Argricultural water management; Cool Farm Tool; Decision support tool; Crop water use; Data scarcity; Landwirtschaftliches Wassermanagement; Entscheidungshilfe; Wassernutzung von Kulturpflanzen; Datenmangel; Bew{\"a}sserungswirtschaft; Wasserverbrauch; Wassereinsparung; Getreidebau; {\"O}kologischer Fußabdruck; Wasserstress}, language = {en} } @phdthesis{Walden2025, author = {Walden, Jasper V. M.}, title = {Advances in industrial heat recovery and heat pump integration : steady-state and time-resolved approaches}, doi = {10.26127/BTUOpen-7113}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71136}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Decarbonizing the industrial sector requires efficient use and electrification of process heat. Industrial heat pumps offer an efficient way to electrify process heat of temperatures up to 450 °C depending on the process and economic boundary conditions. However, mere substitution of conventional boiler systems with heat pumps is non trivial, as the efficiency of a heat pump strongly depends on the temperature levels it operates between and consequently its integration point. Conventional heat pump integration provides thermodynamic guidance, though it does not assess economic- or ecological optimal integration. Furthermore, the existing methods typically consider static or semi-static process data, although most industrial processes experience temperature and heat load fluctuations in the process streams. The current thesis explores optimal heat pump integration and the incorporation of time-resolved process data in Process Integration methodologies. To establish the foundations of heat pump integration, an analytical equation for the optimal heat pump heat sink temperature is derived. The equation reveals key parameters influencing heat pump integration and their respective impact. While the analytical equation determines the optimal heat pump integration for stationary process data, real world heat pump integration is influenced by process fluctuations. These fluctuations can impact heat transfer, affecting the efficiency of both heat recovery and heat pumps. To account for process fluctuations in heat exchanger network design, hourly process data is clustered into a representative dataset. Consequently, a heat exchanger network is designed and evaluated through dynamic simulation. An annual heat recovery benchmark, derived from hourly heat recovery potentials, serves as a reference. For heat pump integration with time-resolved process data, a method utilizing mathematical programming is introduced. To quantify the benefits, the method is put into comparison with conventional approaches as the Time-Average-Model. The method was further extended to assess the impact and requirement for heat pump load flexibility by introducing a reduced-order part load heat pump model. The analytical equation revealed that the electricity-to-reference fuel price ratio is the most influential parameter for heat pump adoption in industry, thus offering valuable insight for policy development. Despite the added complexity of time-resolved process data, the work demonstrated that accounting for hourly process demands provides significant economic and environmental benefits while improving technical feasibility. This highlights the potential of leveraging time-resolved data in process design to improve both economic performance and decarbonization.}, subject = {Industrial heat pumps; Process integration; Heat recovery; Decarbonization; Industrial electrification; Industrielle Dekarbonisierung; Industrielle W{\"a}rmepumpen; Prozessintegration; Zeitaufgel{\"o}ste Prozessdaten; Energieeffizienz; Großw{\"a}rmepumpe; Zeitaufl{\"o}sung Prozessdaten; Dekarbonisierung; Energieeffizienz}, language = {en} } @article{MartienssenRiedelKuehne2024, author = {Martienssen, Marion and Riedel, Ramona and K{\"u}hne, Tom}, title = {Contribution of professional cleaning to indoor air and sewage pollution}, series = {Sustainable Chemistry}, volume = {5}, journal = {Sustainable Chemistry}, number = {4}, publisher = {MDPI}, address = {Basel}, issn = {2673-4079}, doi = {10.3390/suschem5040019}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71378}, pages = {275 -- 286}, year = {2024}, abstract = {In this study, several professional cleaning products were analyzed for their impact on local air and sewage contamination. The products were first analyzed for their content of potentially harmful ingredients, their biodegradability, and the potential for the mobilization of hazardous substances from the floorings that were cleaned. The contribution of the cleaning products to sewage pollution with environmentally hazardous substances was studied at full scale. All commercially available cleaning products studied were declared to be environmentally friendly (labeled with the EU Ecolabel). However, despite being labeled as "green" products, between 16 and 24 volatile harmful ingredients were identified. An optimized experimental product, produced completely from natural raw materials, also contained several harmful substances originating from the herbal raw materials themselves. During the field study, we identified a range of trace substances in the sewage. Eight of these substances (e.g., p-cymene, butanone, eucalyptol) significantly originated from the cleaning products. Several others may have originated from the cleaning products, but other sources were also possible. The flooring materials that were cleaned contained several harmful substances themselves. The release of some substances (e.g., toluene) into the sewage significantly increased during the cleaning process.}, subject = {Professional cleaning agents; Trace substances; Biodegradability; Sewage pollution; Environmental impact}, language = {en} } @article{LeeReb2025, author = {Lee, Roh Pin and Reb, Jochen}, title = {"Waste-to-Products" for the sustainability transformation of megacities : case analysis of impacts of public knowledge and perception on chemical recycling deployment in Singapore}, series = {Cleaner Waste Systems}, volume = {12}, journal = {Cleaner Waste Systems}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2772-9125}, doi = {10.1016/j.clwas.2025.100359}, year = {2025}, abstract = {Megacities generate significant amounts of unsorted domestic waste. Rather than being landfilled/incinerated, this could be used to substitute fossil resources for chemical production via chemical recycling (CR). CR thus represents an opportunity for a parallel achievement of multiple sustainability goals from resource efficiency, decarbonization to circularity and sustainable waste management. However, as an emerging technology, its potential contributions to a nation's sustainability transformation remain debated. While extant literature in the fields of waste management and CR have predominantly focused on waste sorting/segregation/collection as well as techno-economical-ecological feasibility of CR technologies respectively, insights into human factors which could hinder CR deployment in the forms of pyrolysis and gasification for the sustainable waste management in megacities remain lacking. To address this gap, this study implemented a representative online survey in Singapore - a megacity in Southeast Asia aiming to transit towards circularity and zero-waste by 2030 - and enabled first and novel insights into factors in the human dimension which would (1) influence proper waste separation/recycling behaviors - a prerequisite for the successful implementation of waste pyrolysis, and (2) impact societal support for using domestic waste for chemical production via waste gasification rather than for energy production via waste incineration - the dominant waste management approach in Singapore. Study insights regarding the impacts of the human factor and the identified opportunities for CR integration in a nation's waste system - besides extending extant waste management and CR literature - furthermore act as a blueprint for sustainable waste management and green chemistry for the sustainability transformation of other megacities.}, subject = {Chemical recycling; Waste pyrolysis; Waste gasification; Domestic waste; Perception}, language = {en} } @article{vonWernerGlasauer2025, author = {von Werner, Dina and Glasauer, Stefan}, title = {Increased breathlessness in post-COVID syndrome despite normal breathing patterns in a rebreathing challenge}, series = {Scientific Reports}, volume = {15}, journal = {Scientific Reports}, publisher = {Springer Nature}, address = {London}, issn = {2045-2322}, doi = {10.1038/s41598-025-11728-x}, year = {2025}, abstract = {Severe symptoms in the absence of measurable body pathology are a frequent hallmark of post-COVID syndrome. From a Bayesian Brain perspective, such symptoms can be explained by incorrect internal models that the brain uses to interpret sensory signals. In this pre-registered study, we investigate whether induced breathlessness perception during a controlled CO2rebreathing challenge is reflected by altered respiratory measures (physiology and breathing patterns), and propose different computational mechanisms that could explain our findings in a Bayesian Brain framework. We analysed data from 40 patients with post-COVID syndrome and 40 healthy participants. Results from lung function, neurological and neurocognitive examination of all participants were within normal limits on the day of the experiment. Using a Bayesian repeated-measures ANOVA, we found that patients' breathlessness was strongly increased (BF10,baseline=8.029, BF10,rebreathing=11636, BF10,recovery=43662) compared to controls. When excluding patients who hyperventilated (N = 8, 20\%) during the experiment from the analysis, differences in breathlessness remained (BF10,baseline=1.283, BF10,rebreathing=126.812, BF10,recovery=751.282). For physiology and breathing patterns, all evidence pointed towards no difference between the two groups (0.307 > BF10 < 0.704). In summary, we found intact breathing patterns and physiology but increased symptom perception in patients with post-COVID syndrome.}, subject = {Cognitive neuroscience; Fatigue; Perception; Respiratory signs and symptoms; Sensorimotor processing}, language = {en} } @article{HozadAbendroth2025, author = {Hozad, Ahmad Shabir and Abendroth, Christian}, title = {Electro-composting : an emerging technology}, series = {Fermentation}, volume = {7}, journal = {Fermentation}, number = {11}, publisher = {MDPI}, address = {Basel}, issn = {2311-5637}, doi = {10.3390/fermentation11070401}, year = {2025}, abstract = {This study focuses on electrical stimulation for composting. Using the PSALSAR method, a comprehensive systematic review analysis identified 22 relevant articles. The examined studies fall into four main systems: electric field-assisted aerobic composting (EAAC), electrolytic oxygen aerobic composting (EOAC), microbial fuel cells (MFCs), and thermoelectric generators (TEGs). Apart from the main systems highlighted above, bioelectrochemically assisted anaerobic composting (AnCBE, III) is discussed as an underexplored system with the potential to improve the efficiency of anaerobic degradation. Each system is described in terms of key materials, composter design, operating conditions, temperature evolution, compost maturity, microbial community, and environmental outcomes. EAAC and EOAC systems accelerate organic matter decomposition by improving oxygen distribution and microbial activity, whereas MFC and TEG systems have dual functioning due to the energy generated alongside waste degradation. These innovative systems not only significantly improve composting efficiency by speeding up organic matter breakdown and increasing oxygen supply but also support sustainable waste management by reducing greenhouse gas emissions and generating bioelectricity or heat. Together, these systems overcome the drawbacks of conventional composting systems and promote future environmental sustainability solutions.}, subject = {Electric field-assisted; Composting; Bioelectrochemical treatment; Energy generation; Waste management}, language = {en} } @article{OjoAsamoahAlbrechtetal.2025, author = {Ojo, Sola and Asamoah, Solomon and Albrecht, Eike and Ibrahim, Bachar}, title = {Integrating Sustainable Development and Disaster Mitigation into Climate Policies to Support Water Security in Africa}, series = {Earth}, volume = {6}, journal = {Earth}, number = {2}, publisher = {MDPI}, address = {Basel}, issn = {2673-4834}, doi = {10.3390/earth6020057}, year = {2025}, abstract = {Africa's water security is inextricable from the recent patterns of climate variability. Effective formulation and implementation of climate policies require efficient integration of disaster mitigation and sustainable development to eliminate maladaptation and enhance water security. However, practical implementation is still lacking in many African countries. This study aims to examine practical measures and strategies for the integration of sustainable development and disaster mitigation into climate policies to enhance water security in Africa. A systematic bibliometric and thematic analysis was conducted using 95 peer-reviewed articles within the period 2010 to 2025 from the Scopus database. Software and frameworks such as VOSviewer and the Preferred Reporting Items for Systematic Reviews (PRISMA) were employed to analyze publication trends, co-authorship networks, keyword co-occurrence, and themes. The study revealed current research themes such as nature-based solutions for water security, climate-resilient infrastructure and technologies, and practical measures, such as eco-based adaptation and water energy food nexus, as some components of climate policy integration that can enhance water security in Africa. The study offers key policy recommendations for policymakers in the implementation of integrated climate policies adequate and effective enough to deal with water security issues in Africa.}, subject = {Water security; Sustainable development; Disaster prevention; Climate policy; Africa}, language = {en} } @article{DahmaniFellahHeziletal.2025, author = {Dahmani, Maewa and Fellah, Mamoun and Hezil, Naouel and Benoudia, Mohamed-Cherif and Obrosov, Aleksei and El-Hiti, Gamal A. and Weiss, Sabine}, title = {Bioactivity and tribological performance of a novel nano-biomaterial beta-type Ti-alloy}, series = {Journal of Materials Research and Technology}, volume = {36}, journal = {Journal of Materials Research and Technology}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2214-0697}, doi = {10.1016/j.jmrt.2025.03.180}, pages = {2297 -- 2316}, year = {2025}, abstract = {This study investigates the bioactivity; wear performance, and topography of a novel beta-type titanium-based alloy using techniques such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and 2D and 3D analysis. The tribological test was evaluated using a ball-on-disk tribometer in a wet environment. Different loads of 2, 6, and 10 N were applied during the evolution. The data results indicate a significant effect of the milling process on the formation of the hydroxyapatite layer on the surfaces of the Ti-Nb-Mo alloy. Both the wear volume and rate showed a consistent trend of decrease as the milling time increased from 2 to 12 h for all applied loads. The minimum values of wear and volume were reached after 12 h of milling. The improvement in tribological behavior can be attributed to the improved mechanical properties of the alloys. In addition, the significant presence of niobium (Nb) and molybdenum (Mo) plays a critical role in achieving high coefficient of friction values. The primary wear mechanism observed in the Ti-25Nb-25Mo system was adhesive wear in addition to abrasive wear. With its lower Young's modulus and favorable biological and tribological properties, the Ti-25Nb-25Mo alloy represents a promising option for bone tissue applications in orthopedics.}, subject = {Ti-25Nb-25Mo; Milling time; Bioactivity; Hydroxyapatite; Friction coefficient}, language = {en} } @phdthesis{Loulit2024, author = {Loulit, Amine}, title = {Semi Markov Chain models and Cross Entropy approach : tools for industrial maintenance costs optimization}, doi = {10.26127/BTUOpen-7060}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70608}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Importance sampling methods, particularly the Cross Entropy (CE) Approach, were originally used to give estimates of rare events probabilities; but recent literature highlights also the usefulness of the Cross-Entropy Method for optimizations. The (CE) approach has its benefits for noisy optimization problems, for which the objective function has no closed analytical form. In this thesis, we present an example of such a noisy optimization problem: the minimization of the expected total cost per time unit of industrial maintenance actions over a fixed horizon. After giving a brief description of different maintenance philosophies (time based versus condition based, we embed our maintenance problem into a Semi Markov Chain (SMC) framework that allows for simulating failure occurrences in industrial systems. In the theoretical part of this PhD thesis, we show that convergence of the maintenance optimization problem reduces to proving the asymptotic stability of the Cross Entropy method that boils down to a stochastic differential equation of Robbins Monro form. The numerical part consists in considering (truncated) Gaussian and Weibull distributions as candidate distributions belonging to the so-called natural exponential family, and evaluating their impacts on minimizing maintenance costs.}, subject = {Maintenance optimization; Cross Entropy; Semi Markov Chain; Stochastic differential equation; Global convergence; Markov-Erneuerungsprozessen; Stochastische Differentialgleichungen; Robbins-Monro-Prozess; Zubov-Methode; Cross-Entropie-Methode; Semi-Markov-Prozess; Robbins-Monro-Prozess}, language = {en} } @phdthesis{MunozHernandez2025, author = {Mu{\~n}oz Hernandez, Hector Gerardo}, title = {Enhancing single-instruction multiple-threads FPGA-based processors with high-bandwidth-memory}, doi = {10.26127/BTUOpen-7130}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71301}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The gap between memory bandwidth and processing power has been expanding continuously. Not long ago, some memory technology initiatives have been proposed in order to bridge this disparity. One of the most promising solutions comes in the form of 3D stacked memories like High-Bandwidth Memory (HBM). By adding several and wider memory channels that can do memory transactions in parallel, these memories increase significantly the data throughput and aim to close the aforementioned gap. A popular way to prototype and test these memories is to integrate them with Field Programmable Gate Arrays (FPGAs) due to their high reconfigurability. Graphic Processing Units (GPUs) are another inherently parallel targeted hardware, and so some advances in integrating GPUs with HBM are already present in the industry. This new technology integration brings a paradigm shift because in order to fully take advantage of the parallel nature of HBM, the hardware design has to also support this highly parallel data throughput. While GPUs provide high data processing parallelism, FPGAs are known for their flexibility. Intellectual Property (IP) blocks are an example of this flexibility, because they are a bundle of Hardware Description Language (HDL) code which can be included in an existing implementation of an FPGA, adding functionality to it. Soft-IP-cores implemented on reconfigurable hardware, are a solution that offers advantages from both worlds, where a soft-GPU could be hosted in an FPGA. There is, however, a gap in knowledge on how 3D stacked memories support soft-GPU-cores. This thesis analyses this gap and provides insights into how HBM memories can be exploited in soft-GPU-cores. To accomplish such an endeavor, this thesis presents, evaluates, and analyzes a complete open-source environment that consists of a soft-GPU with HBM compatibility. The contributions are composed of several different tools ranging from the model simulator, to easy-to-use implementation flow on real hardware. The environment also includes a roofline model which is used to analyze how applications from different domains behave and can be optimized in the custom hardware.}, subject = {Field programmable gate array; Soft-core; High-bandwidth-memory; RISC-V; Embedded systems; FPGA; HBM; Eingebettete Systeme}, language = {en} } @phdthesis{Dikariev2025, author = {Dikariev, Illia}, title = {Relaxierungen von Steuerungsproblemen mit unendlichem Zeithorizont : Young-Maße und Existenz optimaler L{\"o}sungen}, doi = {10.26127/BTUOpen-7107}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71078}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The focus of this work is on the development of existence results for non-convex optimal control problems over an unbounded time horizon. The work is structured into three parts: - the elaboration of necessary functional-analytic foundations, - the derivation of equivalence relations between different types of relaxations, - existence statements for both compact and unbounded control domains. Particularly, the topology of compact convergence is introduced on the space of locally absolutely continuous functions. Further we develop embedding theorems and a Hardy inequality in relation to weighted reflexive Sobolev spaces, which are proposed as state spaces. The integrand of the objective functional is assumed to be a non-negative normal integrand, and the state equation is assumed to be a Carath{\´e}odory differential equation. The time interval is endowed with measures induced by weights. We present sufficient conditions to establish the equivalence of three pertinent types of relaxations Γ-regularization, generalized control, and sliding mode. To establish the existence results, we focus on the relaxation based on generalized controls (Young measures). In this context, we develop a suitable disintegration theorem and a weakened Prokhorov condition that are especially applicable to the case of generalized controls and non-linear state equations over an unbounded control domain. On the measure spaces, we introduce the vague or tight topology, depending on whether the control domain is compact or not. In the final part of the work we propose growth conditions on the integrand and on the right-hand side of the state equation to enforce closedness and compactness properties of an admissible set. Correspondingly, appropriate lemmas and existence theorems are presented for the cases of a compact resp. unbounded control domain, based on an existence theorem by Weierstrass. Finally, the existence results are illustrated through application examples.}, subject = {Optimal control; Optimale Steuerung; Infinite time horizon; Unendlicher Zeithorizont; Young measures; Young-Maße; Relaxed controls; Verallgemeinerte Steuerungen; Unbounded controls; Unbeschr{\"a}nkte Steuerungen; Optimale Kontrolle; Hardy-Raum; Sobolev-Raum; Carath{\´e}odory-Differentialgleichung; Young-Maß}, language = {de} } @article{KaestnerCaviedesVoulliemeHinz2025, author = {K{\"a}stner, Karl and Caviedes-Voulli{\`e}me, Daniel and Hinz, Christoph}, title = {Formation of spatial vegetation patterns in heterogeneous environments}, series = {PLOS One}, volume = {20}, journal = {PLOS One}, number = {5}, publisher = {PLOS}, address = {San Francisco}, issn = {1932-6203}, doi = {doi.org/10.1371/journal.pone.0324181}, year = {2025}, abstract = {Functioning of many resource-limited ecosystems is facilitated through spatial patterns. Patterns can indicate ecosystems productivity and resilience, but the interpretation of a pattern requires good understanding of its structure and underlying biophysical processes. Regular patterns are understood to form autogenously through self-organization, for which exogenous heterogeneities are negligible. This has been corroborated by reaction-diffusion models which generate highly regular patterns in idealized homogeneous environments. However, such model-generated patterns are considerably more regular than natural patterns, which indicates that the concept of autogenous pattern formation is incomplete. Models can generate patterns which appear more natural when they incorporate exogenous random spatial heterogeneities (noise), such as microtopography or spatially varying soil properties. However, the mechanism through which noise influences the pattern formation has not been explained so far. Recalling that irregular patterns can form through stochastic processes, we propose that regular patterns can form through stochastic processes as well, where spatial noise is filtered through scale-dependent biophysical feedbacks. First, we demonstrate that the pattern formation in nonlinear reaction-diffusion models is highly sensitive to noise. We then propose simple stochastic processes which can explain why and how random exogenous heterogeneity influences the formation of regular and irregular patterns. Finally, we derive linear filters which reproduce the spatial structure and visual appearance of natural patterns well. Our work contributes to a more holistic understanding of spatial pattern formation in self-organizing ecosystems.}, subject = {Linear filters; Anisotropy; Autocorrelation; Bandpass filters; Nonlinear systems}, language = {en} } @phdthesis{RodriguezHenriquez2025, author = {Rodr{\´i}guez Henr{\´i}quez, Jos{\´e} Juan}, title = {Fundamental study on surrogates for commercially available fuels under engine-like conditions}, doi = {10.26127/BTUOpen-7114}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71142}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The increasing global energy demand, driven by technological advancements and population growth, has led to a significant rise in crude oil consumption. This trend is expected to continue until 2040 due to the lack of viable alternatives for sectors such as road freight, aviation, and petrochemicals. The combustion of fossil fuels, however, results in the emission of toxic and carcinogenic pollutants, including particulate matter (PM) and nitrogen oxides (NOx). This thesis aims to enhance the understanding of the formation and decomposition pathways of these pollutants under engine-like conditions using surrogate fuels. The research was conducted at the Brandenburg University of Technology Cottbus-Senftenberg, funded by the EU FP7 Marie Skłodowska Curie action, Initial Training Network (ITN) project ECCO-MATE. The project involved collaboration with 11 key partners from academia and industry across Europe and Japan. The primary objective was to develop and implement novel combustion technologies for marine and automotive engines to improve efficiency and meet stringent emission standards. Experimental studies were carried out using various analytical techniques, including gas chromatography, gas analysis, and luminescence techniques. These methods were optimized for engine-like conditions to investigate the formation of PM and NOx. The research utilized a range of experimental facilities, such as shock tubes and rapid compression machines, to measure ignition delay times and flame speciation. The study also involved the characterization of commercial fuels and the selection of surrogate fuels to represent their properties. The findings indicate that the addition of diluents, such as nitrogen and carbon dioxide, can significantly reduce the formation of NOx and PM. The use of oxygenated fuels, like dimethyl ether (DME), was found to enhance combustion efficiency and reduce pollutant emissions. The research also highlighted the importance of understanding the chemical kinetics of fuel decomposition and the role of polycyclic aromatic hydrocarbons (PAHs) in soot formation. Overall, this thesis provides valuable insights into the combustion behavior of surrogate fuels under engine-like conditions. The results contribute to the development of cleaner and more efficient combustion technologies for the automotive and marine sectors, aligning with global efforts to reduce the environmental impact of fossil fuel consumption.}, subject = {Combustion; Thermodynamics; Fuels; PAH; Verbrennung; Thermodynamik; Brennstoffe; Verbrennung; Ersatzbrennstoffe; Fossiler Brennstoff}, language = {en} } @techreport{OPUS4-7026, type = {Working Paper}, title = {Transformation der Innenstadt : Zukunftsvisionen resilienter Zentren von Klein- und Mittelst{\"a}dten in Brandenburg}, editor = {Hackenberg, Sinah and Heßmann, Alexandra and Weidner, Silke}, issn = {2941-7406}, doi = {10.26127/BTUOpen-7026}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70267}, year = {2025}, abstract = {Die Innenst{\"a}dte stehen unter Handlungsdruck. Der R{\"u}ckgang des Einzelhandels, zunehmende Leerst{\"a}nde, ver{\"a}nderte gesellschaftliche Anspr{\"u}che sowie Herausforderungen durch den Klimawandel, demografische Entwicklungen und neue Mobilit{\"a}tsbed{\"u}rfnisse machen eine grundlegende Neuorientierung notwendig. Besonders Klein- und Mittelst{\"a}dten in Brandenburg stehen vor der Aufgabe, ihre Zentren zukunftsf{\"a}hig zu gestalten. Im Rahmen des Bachelor-Seminars Vertiefung Stadtmanagement - Transformation der Innenstadt besch{\"a}ftigten sich Studierende der Architektur und Stadtplanung mit ausgew{\"a}hlten Fallstudien brandenburgischer St{\"a}dte. Ziel war die Analyse bestehender Strukturen, Aktkurskonstellationen und Entwicklungspotenziale sowie die Erarbeitung r{\"a}umlicher und konzeptioneller Strategien zur St{\"a}rkung der Resilienz und Nutzungsvielfalt in den Zentren. Fachvortr{\"a}ge aus der kommunalen Praxis und Einblicke in Modellprojekte des Bundesprogramms „Zukunftsf{\"a}hige Innenst{\"a}dte und Zentren" lieferten wertvolle Impulse. Die entwickelten Konzepte legen den Fokus auf konsumfreie Aufenthaltsqualit{\"a}ten, den Umgang mit Leerstand, die Aktivierung von Freir{\"a}umen sowie die F{\"o}rderung sozialr{\"a}umlicher Kooperationen. Die Ergebnisse zeigen auf, wie durch integrierte, partizipative und experimentelle Ans{\"a}tze langfristige Perspektiven f{\"u}r die Innenst{\"a}dte entwickelt werden k{\"o}nnen.}, subject = {Transformation; Innenstadt; Zukunftsvision; Brandenburg; Stadtmanagement; Transformation; City center; Inner city; Urban development; Urban management; Brandenburg; Kleinstadt; Mittelstadt; Innenstadt; Stadtmanegement; Stadtsanierung}, language = {de} } @techreport{OPUS4-7109, title = {Naples : continuity and disruption}, editor = {Viderman, Tihomir}, issn = {2702-6892}, doi = {10.26127/BTUOpen-7109}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-71099}, year = {2025}, abstract = {This publication compiles the results of a study excursion to Naples undertaken by Master's students in architecture and planning at BTU Cottbus-Senftenberg from 2 to 9 October 2023. Framed by the conceptual tension between continuity and disruption, the excursion examined how these dynamics shape the material, social, and symbolic textures of the city. The publication presents paired posters created by each student: one produced prior to the excursion in response to Elena Ferrante's novel, and one developed afterward, drawing on situated encounters with urban space. These visualisations reflect how perceptions of Naples shifted through embodied experience and critical engagement with the politics of representation.}, subject = {Naples; Visualisation; Representation; Relational space; Situated learning; Neapel; Raumvorstellungen; Repr{\"a}sentation; Relationale R{\"a}ume; Lernen am Ort; Neapel; Stadtstruktur; Raumvorstellung; Kontinuit{\"a}t; Stadtleben}, language = {en} } @phdthesis{Schorradt2025, author = {Schorradt, Martin}, title = {The semantic and spatio-temporal structure of audible speech}, doi = {10.26127/BTUOpen-7087}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70875}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The goal of the present thesis is to assess whether it is possible to rejuvenate voices of adults to a certain desired age. Therefore, in a set of recordings, two of the main voice features (i.e., pitch and formants) were manipulated in a systematic way. Since children do not only sound different from adults but also articulate in an other manner the resynthesized recordings were made unintelligible. The present thesis presents an evaluation of different entrenched techniques for semantic removal and furthermore, aimes to offer a new approach based on a morphological operator. To not just give insight about the capability of the conducted manipulations but also to provide valuable results in the field of perception of speech, a series of perceptual experiments was conducted.}, subject = {Age synthesis; Age regression; Speech synthesis; Speech processing; Semantic space; Alterssynthese; Altersregression; Sprachsynthese; Sprachverarbeitung; Semantischer Raum; Sprachverarbeitung; Automatische Sprachproduktion; Stimme; Lebensalter; Semantischer Raum; Wahrnehmung; Experiment}, language = {en} } @techreport{OPUS4-7063, title = {Researching policies for future heritage : applying cultural heritage approaches to the fighting game community}, editor = {Venne, Michel}, doi = {10.26127/BTUOpen-7063}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70630}, year = {2025}, abstract = {Over a period of six months, students of World Heritage Studies researched the Fighting Game Community (FGC) through a cultural heritage lens to attempt to identify the potential of the FGC as cultural heritage worthy of protection. The results of the students' self-guided work are found in this report. With case studies from Germany, Indonesia, South Korea, India, Tanzania, Iran, and Mexico, a wide range of topics and approaches were implemented to understand the FGC better. Additionally, two chapters cover the history and academic study of the FGC documented through a digital Zotero Library. Particularly of note is one chapter on the analysis of international standard-setting instruments and their relevancy in the theoretical protection of the FGC as cultural heritage, which highlighted the gaps in current standard-setting instruments for traditions like the FGC. As a result of all the work undertaken, this report identifies that the FGC has many elements which, when understood through current international standard-setting instruments, are not accounted for due to the hybrid digital / in presence nature of the FGC. Additionally, defining the values of the FGC often is context-dependent as demonstrated across case studies, make it difficult to apply a unified approach to the subject.}, subject = {Heritage; Digital heritage; Fighting game community; Standard-setting instruments; Erbe; Digitales Erbe; Standardsetzende Instrumente; Studentische Forschung; Kulturerbe; Kampfspiel; Standardisierung; Forschung}, language = {en} } @misc{Kadalassery2025, type = {Master Thesis}, author = {Kadalassery, Meenu}, title = {Big Data's role in shaping UNESCO's cultural policies : a critical analysis within the scope of the 2005 convention on the diversity of cultural expressions}, doi = {10.26127/BTUOpen-7093}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70934}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {The rise of digital technologies and the vast quantities of data they generate are transforming multiple sectors, including culture. However, the cultural sector's engagement with these technologies and their potential remains underexplored. Amid rising criticisms of the cultural sector for its inefficient use of existing data and its lack of innovation in leveraging new data sources for the sector's benefit, there are calls for a renewed approach to data use and a nuanced understanding of its impact on cultural policymaking. Big Data, an emerging topic of interest in policymaking, has been studied for its capacity to support evidence-based decision-making. Additionally, it is increasingly being explored as an alternate data source in research within the culture and heritage sector, especially for supporting policymaking. This study examines the broader discourse on the use of Big Data in cultural policymaking, focusing on its perception as an innovation, the stages of its adoption or rejection, and the types of innovation decisions that influence those stages. Anchored in the Diffusion of Innovation theory, the analysis is framed within UNESCO's 2005 Convention on the Diversity of Cultural Expressions. Additionally, the research identifies key challenges and opportunities for integrating Big Data into cultural policymaking, both within the framework of the 2005 Convention and in a broader context. The research proposes a conceptual framework that suggests considering Big Data as a potential facilitator for cultural policy innovation and advocates for its further examination. The research concludes with actionable recommendations and a broad-level guideline for advancing the discussion on the viability of Big Data as an innovation for cultural policymaking.}, subject = {Big Data; Cultural policymaking; Data innovation; 2005 UNESCO Convention; Diffusion of Innovations theory; Big Data; Kulturpolitik; Dateninnovation; UNESCO-Konvention von 2005; Theorie der Diffusion von Innovationen; Kulturpolitik; Kulturwirtschaft; Big Data; Innovation; Convention on the Protection and Promotion of the Diversity of Cultural Expressions (2005 Oktober 20)}, language = {en} } @phdthesis{Hoeppner2025, author = {H{\"o}ppner, Martin}, title = {Decisions under risk : an economic analysis}, doi = {10.26127/BTUOpen-7062}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70622}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {This dissertation explores decision-making under risk through a comprehensive economic analysis. It aims to deepen our understanding of how individuals make choices when faced with uncertainty and risk, integrating various theoretical models and empirical findings. The thesis begins by surveying established models in the literature from economics, psychology and biology, highlighting their strengths and limitations. Subsequently, possible challenges and avenues forward are presented. To highlight the limitations of a constant risk preference assumption, an experiment was carefully designed for the second paper. This study compares these models in an online experiment, emulating real-world investment decisions. The findings reveal significant deviations from traditional theories, suggesting the need for more flexible and encompassing frameworks. A change in individual decision-making behavior is observed between different rounds of the experiment, not only indicating a variable risk preference, but an adaptive decision-making process altogether. To explore this on a theoretical level, this dissertation subsequently delves into the evolutionary dynamics of risk preferences, examining how different behavioral models survive and thrive in competitive environments. The results indicate that models which allow for adaptive risk preferences have an evolutionary advantage over those that do not. This questions the current empiric approach in search for a single risk preference parameter to explain and predict individual behavior. An observed change in the decision making process could be modelled with the assumption of bounded rationality, offering a more accurate depiction of human behavior. Overall, this dissertation contributes to the field of behavioral economics by providing a nuanced understanding of decision-making under risk, surveying a wide array of models, criteria to evaluate them, and offering practical implications for policy-making and risk management. The work underscores the importance of integrating empirical evidence with theoretical advancements to better comprehend and predict behavior in uncertain environments.}, subject = {Risk; Uncertainty; Decision theory; Decision models; Risk preferences; Entscheidungsmodelle; Entscheidungstheorie; Risiko; Risikopr{\"a}ferenzen; Unsicherheit; Entscheidung bei Risiko; Entscheidung bei Unsicherheit}, language = {en} } @article{BasuRossol2025, author = {Basu, Syamantak and Rossol, Manuela}, title = {You are what you eat : metabolic recycling of phagocytosed bacteria modulates macrophage immunity}, series = {Signal Transduction and Targeted Therapy}, volume = {10}, journal = {Signal Transduction and Targeted Therapy}, publisher = {Springer Nature}, address = {London}, issn = {2059-3635}, doi = {10.1038/s41392-025-02222-x}, year = {2025}, abstract = {In a recent study show that phagocytosed bacteria can be recycled by macrophages to serve as an alternative nutrient source. Bacterial cAMP was identified as a signal for macrophages to differentiate between dead and live bacteria and to adjust the inflammatory response accordingly. You are what you eat - at least when it comes to macrophages. Macrophages have a high capacity to take up fluid, macromolecules, apoptotic cells, and microorganisms from the extracellular space. Uptake of macromolecules by macropinocytosis and subsequent degradation in lysosomes in an infectious or autoimmune setting can lead to excessive inflammation. It is also known that engulfment of apoptotic cells and digestion in phagolysosomes by the macrophages generates amino acids, nucleotides, and fatty acids that then act as metabolites and signalling molecules in the macrophages and influence their cellular functions. Up until now, it was largely believed that phagolysosomes containing engulfed microorganisms are tightly sealed vesicles, so that potentially harmful components from the foreign organisms aren't diffused in the cell. Lesbats et al. show here for the first time that macrophages recycle engulfed bacteria and use the components as nutrient source.}, subject = {Cell biology; Infection; Innate immune cells}, language = {en} } @misc{OPUS4-7052, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,27 (09.07.2025)}, doi = {10.26127/BTUOpen-7052}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70524}, year = {2025}, abstract = {1. Erste {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Umweltingenieurwesen (B.Sc.) vom 07. Juli 2025 2. Lesefassung: Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Umweltingenieurwesen vom 21. September 2021 (AMbl. 17/2021) i. d. F. der Ersten {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Umweltingenieurwesen (B.Sc.) vom 07. Juli 2025}, language = {de} } @article{BucherDjoudiBirkhofer2025, author = {Bucher, Roman and Djoudi, El Aziz and Birkhofer, Klaus}, title = {Land‑use impacts on crop yield : direct and indirect roles of arthropods and associated ecosystem services in European farmland}, series = {Landscape Ecology}, volume = {40}, journal = {Landscape Ecology}, publisher = {Springer Nature}, address = {Heidelberg}, issn = {1572-9761}, doi = {10.1007/s10980-025-02117-w}, year = {2025}, abstract = {Land-use intensification to increase yields is often detrimental to biodiversity undermining the provision of ecosystem services. However, it is questionable if ecosystem service providers contribute to ecological intensification by achieving the same or higher yields than conventional high-intensity agriculture. In this study, we aimed to disentangle the effects of local and landscape-scale land-use intensification on arthropod communities and their contribution to ecosystem services and crop yield. A set of meta-analytic structural equation models allowed us to assess direct and indirect relationships in the cascade from land use to yield. We selected 37 datasets containing information on land use, community composition, levels of pollination and natural pest control services, and crop yield. We quantified functional diversity of communities by collecting trait information for three exemplary groups of service-providers: bees, ground beetles, and spiders. Local land-use intensification reduced the abundance of all arthropod groups. Spiders were the only group whose species richness was negatively related to a higher percentage of arable land in the landscape. High abundance of bees related positively to oilseed rape pollination and crop yields. In the models for the two predator groups, crop yield was strongly determined by land use, independent of the pest control services provided by natural enemies. Our results suggest a potential for ecological intensification mediated by land-use change in crops where pollination benefits yield, but suggest more nuanced effects for pest control. Our study also calls for experiments on multiple taxonomic groups and ecosystem services that apply comparable methods at similar scales.}, subject = {Agroecology; Ecological intensification; Meta-analytic structural equation models; Pollination; Pest control}, language = {en} } @article{BerneckerGebhardtAmoretal.2025, author = {Bernecker, Maximilian and Gebhardt, Marc and Amor, Souhir Ben and Wolter, Martin and M{\"u}sgens, Felix}, title = {Quantifying the impact of load forecasting accuracy on congestion management in distribution grids}, series = {International Journal of Electrical Power and Energy Systems}, volume = {168}, journal = {International Journal of Electrical Power and Energy Systems}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1879-3517}, doi = {10.1016/j.ijepes.2025.110713}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70351}, year = {2025}, abstract = {Digitalization is a global trend in energy systems and beyond. However, it is often unclear what digitalization means exactly in the context of energy systems and how the benefits of digitalization can be quantified. Providing additional information, e.g., through sensors and metering equipment, is one concrete angle where digitalization contributes. This paper provides a framework to quantify the value of such additional information in distribution grids. We analyze to what extent smart meters improve the accuracy of day-ahead load forecasts and quantify the savings in congestion management costs resulting from the improved accuracy. To quantify the cost reduction, we conduct a case study employing a simplified IEEE test system. Historical electricity load data from over 6,000 smart meters was used to improve day-ahead load forecasts. We assessed and compared the forecasting performance to estimates based on standard load profiles with multiple load forecast simulations in the network based on uncertainty parameterizations from forecasts with and without smart meter data. Calculating redispatch cost in the distribution grid, we find that the forecast based on smart meter data reduces key redispatch parameters such as the share of expected voltage violations, the amount of rescheduled generation by more than 90\%. These improvements translate into a reduction in congestion management costs by around 97\%. Furthermore, we shed light on whether the gains increase linearly with the number of smart meters and available data in the grid. When smart meter shares are increased uniformly throughout the grid, savings are concave, i.e., the first 10\% of smart meters reduces congestion management costs by around 20\% while the last 10\% reduces these costs only marginally. Focusing smart meter installation on the most congested nodes reduces congestion management costs by around 60\% with just 10\% smart meter coverage, significantly outperforming a uniform rollout. However, savings in congestion management alone are not likely to recover the installation and operation costs of the installed smart meter.}, subject = {Distribution Grid; Congestion management; Uncertainty; Forecasting; Smart Meter}, language = {en} } @article{BasuUlrbrichtRossol2025, author = {Basu, Syamantak and Ulrbricht, Ying and Rossol, Manuela}, title = {Healthy and premature aging of monocytes and macrophages}, series = {Frontiers in Immunology}, volume = {16}, journal = {Frontiers in Immunology}, publisher = {Frontiers}, address = {Lausanne}, issn = {1664-3224}, doi = {10.3389/fimmu.2025.1506165}, year = {2025}, abstract = {Aging is associated with immunosenescence, a decline in immune functions, but also with inflammaging, a chronic, low-grade inflammation, contributing to immunosenescence. Monocytes and macrophages belong to the innate immune system and aging has a profound impact on these cells, leading to functional changes and most importantly, to the secretion of pro-inflammatory cytokines and thereby contributing to inflammaging. Rheumatoid arthritis (RA) is an autoimmune disease and age is an important risk factor for developing RA. RA is associated with the early development of age-related co-morbidities like cardiovascular manifestations and osteoporosis. The immune system of RA patients shows signs of premature aging like age-inappropriate increased production of myeloid cells, accelerated telomeric erosion, and the uncontrolled production of pro-inflammatory cytokines. In this review we discuss the influence of aging on monocytes and macrophages during healthy aging and premature aging in rheumatoid arthritis.}, subject = {Monocytes; Macrophages; Aging; Immunosenescence; Rheumatoid arthritis}, language = {en} } @article{SaraviaTrachte2025, author = {Saravia, Christian and Trachte, Katja}, title = {Spatiotemporal analysis of NH³ emission sources and their relation to land use types in the eastern German lowlands}, series = {Atmosphere}, volume = {16}, journal = {Atmosphere}, number = {3}, publisher = {MDPI}, address = {Basel}, issn = {2073-4433}, doi = {10.3390/atmos16030346}, year = {2025}, abstract = {Ammonia (NH³) emissions, which are key precursors of fine particulate matter, pose significant environmental challenges. This study investigated the spatiotemporal variations in NH³ emissions across the eastern German lowlands from 2013 to 2022 using IASI-B satellite data. Five major Land Cover Classes (LCC) -tree, grassland, cropland, built-up areas, and water bodies- were analyzed. The results showed distinct diurnal variations, with nighttime NH³ concentrations exceeding 2.0 × 10¹⁶ molecules cm⁻² in the peak months. Seasonal patterns indicated significant emissions in March (1.2 × 10¹⁶ molecules cm⁻²), April (1.1 × 10¹⁶ molecules cm⁻²), and August (9.6 × 10¹⁵ molecules cm⁻²), while the lowest concentrations occurred in September (0.6 × 10¹⁵ molecules cm⁻²). Persistent hotspots were identified in the northwestern region, where emissions peaked in spring (1.8 × 10¹⁶ molecules cm⁻²) and summer (1.3 × 10¹⁶ molecules cm⁻²), primarily due to agricultural activities. Over the study period, the annual NH³ concentration peaked in 2015, 2018, and 2022. Using k-means clustering, three distinct emission zones were identified, with Cluster 3 showing the highest NH³ emission values, particularly in urban centers, and agricultural zones were identified, covering less than 20\% of the study area, where cropland predominates (8\%). Meteorological factors significantly influenced NH³ levels, with negative correlations obtained for precipitation, wind speed, and evaporation, while solar radiation, boundary layer height, and instantaneous moisture fluxes showed positive correlations. A case study from March 2022, employing the HYSPLIT trajectory model, confirmed that agricultural practices are the dominant NH³ source, with emissions reaching 3.2 × 10¹⁶ molecules cm⁻² in hotspot regions.}, subject = {Ammonia; Remote sensing; Land cover type; Spatiotemporal variability; Cluster k-means}, language = {en} } @article{KotGawlińskaNęcekPożarowskaetal.2025, author = {Kot, Małgorzata and Gawlińska-Nęcek, Katarzyna and Pożarowska, Emilia and Henkel, Karsten and Schmeißer, Dieter}, title = {Photosensitivity and carrier densities of perovskite solar absorbers}, series = {Advanced Science}, volume = {12}, journal = {Advanced Science}, number = {16}, publisher = {Wiley}, address = {Weinheim}, issn = {2198-3844}, doi = {10.1002/advs.202412711}, year = {2025}, abstract = {Dark and light current-voltage characteristics of perovskite solar absorbers are analyzed in terms of their carrier densities. The analysis reveals p-type large polarons as a dominant carrier type in the investigated perovskite solar cells. The mechanism causing photosensitivity is attributed to the dissociation (and pairing) of bipolarons to large polarons (and vice versa) that are controlled by the internal potential Γ. As an example, the polaron concept is tested for a formamidinium lead triiodide perovskite solar cell. The individual steps of the data analysis are demonstrated and determine the ionicity factor of this perovskite film, quantify the density of the large polarons, and predict the gain and loss of photo-induced carriers. It is deduced that a reversible light-on/off operation can only occur when the bias voltage never exceeds a critical value of the internal potential. The results gained in this study suggest that the novel analysis can be successively applied on different hybrid perovskite materials, too.}, subject = {Bipolarons; Ionicity factor; Large polarons; Perovskite solar cells}, language = {en} } @article{IjiomaIjiomaHerd2025, author = {Ijioma, Uche Dickson and Ijioma, Michael and Herd, Rainer}, title = {Assessment of quality and health risks in drinking water sources in Aba, Nigeria}, series = {Water Practice \& Technology}, volume = {20}, journal = {Water Practice \& Technology}, number = {4}, publisher = {IWA Publishing}, address = {London}, issn = {1751-231X}, doi = {10.2166/wpt.2025.042}, pages = {937 -- 953}, year = {2025}, abstract = {Unregulated urban activities significantly impact drinking water quality in many developing communities. This study applied a Water Safety Plan (WSP) to assess water quality, health risks, and the effects of harmful environmental practices in Aba, Nigeria, where the waterworks infrastructure is dysfunctional. The datasets used were collected from physicochemical, chemical, and bacteriological analyses of drinking water samples (natural sources: n ¼ 60, secondary sources: n ¼ 19), along with household surveys (120) and semi-structured expert interviews (10). Findings revealed that groundwater is the primary drinking water source, with most facilities classified as improved sources. However, poor sanitation practices, particularly improper septage disposal, were identified as major contributors to water contamination. Risk assessments based on hazard quotient/index (HQ/HI < 1) indicated low health concerns overall, but higher risks were observed in areas with intense urbanization. Bacteriological analysis showed severe contamination in the Aba River, while sachet water posed significant health risks due to the presence of E. coli and total coliform bacteria in some cases. Despite existing environmental policies in Nigeria, weak institutional frameworks and ineffective local governance hinder effective water quality management. Addressing these challenges requires stronger regulatory enforcement and locally adapted strategies to ensure safe drinking water access.}, subject = {Drinking water quality; Hazard quotient/index; Microbial quality; Nigeria; Water safety plan}, language = {en} } @misc{OPUS4-7051, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,26 (30.06.2025)}, doi = {10.26127/BTUOpen-7051}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70519}, year = {2025}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Umweltwissenschaften (B.Sc.) vom 30. Juni 2025}, language = {de} } @misc{OPUS4-7049, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,25 (30.06.2025)}, doi = {10.26127/BTUOpen-7049}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70499}, year = {2025}, abstract = {1. Zweite {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Medizintechnik (B.Eng.) vom 30. Juni 2025 2. Lesefassung: Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Medizintechnik (B.Eng.) vom 04. Oktober 2022 (AMbl. 23/2022) i. d. F. der Zweiten {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Medizintechnik (B.Eng.) vom 30. Juni 2025}, language = {de} } @phdthesis{Katzer2024, author = {Katzer, Christian}, title = {Modellierung und Optimierung des Verbrennungszustands anhand der dynamischen Flammenstabilit{\"a}t am Beispiel eines Kohlebrenners}, doi = {10.26127/BTUOpen-7040}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70402}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Im Rahmen der vorliegenden Arbeit wurde eine modellgest{\"u}tzte Prozessoptimierung an einer 400 kWth Verbrennungsanlage entwickelt, mit dem Ziel, die Betriebsoptimierung in Echtzeit zu realisieren. Die Grundlage bildet ein physikalisch-netzwerkgekoppeltes Modell der Verbrennungsanlage, das mit einem neuronalen Netzwerk zur Analyse der Betriebsdaten des Brenners hinsichtlich der Verbrennungsstabilit{\"a}t kombiniert wird. Der Optimierungsalgorithmus basiert auf einer Zielfunktion, die die Flammenstabilit{\"a}t und den Luftanteil ber{\"u}cksichtigt. Im {\"U}berblick zum aktuellen Stand der Technik wurde zun{\"a}chst die Problemstellung der Flammenstabilit{\"a}t auf das untersuchte Feststoff-Brennersystem {\"u}bertragen und der erforderliche Zugriff auf physikalisch-chemische Parameter der Flammenzone zur Zustandsbewertung des Systems erl{\"a}utert. Das Modell wurde auf der Grundlage experimenteller Untersuchungen am Gas-/Kohle-Kombibrenner des Verbrennungsversuchsstands VVS400 an der BTU Cottbus-Senftenberg entwickelt. Dabei wurden verschiedene Messmethoden zur Erfassung instation{\"a}rer Verbrennungseffekte {\"u}berpr{\"u}ft. Insbesondere erwies sich die UV-Flammenstrahlung und die Chemolumineszenz des OH*-Radikals als geeignet f{\"u}r die Bewertung der prim{\"a}ren Verbrennungszone. Diese Methodik erm{\"o}glichte es, das Verbrennungsverhalten zu analysieren und ein Modell zur Bewertung der Flammenstabilit{\"a}t zu entwickeln. Eine wesentliche Erkenntnis war, dass das Flammenw{\"a}chtersignal, unterst{\"u}tzt durch eine Frequenzanalyse, eine zuverl{\"a}ssige Datenquelle f{\"u}r die Modellierung und Optimierung des Brennersystems darstellt. Das entwickelte Bewertungssystem erm{\"o}glicht eine pr{\"a}zise Beurteilung des Verbrennungszustands sowie die Berechnung von Optimierungsmaßnahmen, die als Handlungsempfehlungen f{\"u}r den Brennerbetrieb dienen. Im weiteren Verlauf wurde ein quasistation{\"a}res Modell entwickelt, das physikalische Modellierungsans{\"a}tze mit neuronalen Netzwerken kombiniert, um komplexe Betriebsparameter abzubilden. Diese Modellierung zeigte eine hohe {\"U}bereinstimmung mit den experimentellen Messdaten und bildete somit eine effektive Grundlage f{\"u}r die Prozessoptimierung. Das Optimierungsverfahren basiert auf dem Pattern-Search-Verfahren, wobei die Flammenstabilit{\"a}t und der Luftanteil als Optimierungsziele definiert wurden. Die Ergebnisse der Untersuchungen belegen, dass das integrierte Verfahren zur Flammenbewertung und -optimierung erfolgreich zur Echtzeit-Analyse und Steuerung von Brennersystemen eingesetzt werden kann. Anhand von Validierungsmessungen wird das Potenzial zur Modellierung und Optimierung des Verbrennungszustands auf Basis der dynamischen Flammenstabilit{\"a}t am Beispiel eines Kohlebrenners diskutiert. Das vorgestellte Verfahren soll als Hilfsmittel f{\"u}r Brennersysteme dienen, um den steigenden Anforderungen an Emissionsgrenzen und Lastflexibilit{\"a}t gerecht zu werden. Die {\"U}bertragbarkeit vom experimentellen Rahmen auf die Industrieanwendung wird diskutiert, und weiterer Entwicklungsbedarf abgeleitet.}, subject = {Verbrennung; Flammenstabilit{\"a}t; Optimierungsmodell; Combustion; Combustion stability; Optimization model; Neuronales Netzwerk; Neural network; Verbrennung; Flammenstabilit{\"a}t; Prozessoptimierung; Modell; Neuronales Netz}, language = {de} } @techreport{HoffmannThomasWinkler2025, author = {Hoffmann, Stefanie and Thomas, Kevin and Winkler, Herwig}, title = {Der Design Thinking Ansatz : Fallstudien zum Prototyping von Komponenten und Systemen der dezentralen Energietechnik}, organization = {BTU Cottbus-Senftenberg, Lehrstuhl f{\"u}r Produktionswirtschaft}, doi = {10.26127/BTUOpen-7059}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70592}, year = {2025}, abstract = {Diese Studie entstand im Kontext des Forschungsprojekts „SpreeTecneXt". Ziel war es, durch den Design Thinking Ansatz innovative und nachhaltige L{\"o}sungen f{\"u}r die dezentrale Energietechnik zu entwickeln. Drei konkrete Fallstudien wurden auf Basis der Design Thinking-Methode durchgef{\"u}hrt: ein Reinigungssystem f{\"u}r PV-Module, ein nachsteuerndes Floating-PV-System und eine nachhaltige mobile Parkbox. Die Methode Design Thinking zeichnet sich durch ihren nutzerzentrierten, iterativen und kreativen Prozess aus, der besonders in unsicheren und dynamischen Marktumfeldern geeignet ist, komplexe Herausforderungen zu bew{\"a}ltigen. Im Rahmen der durchgef{\"u}hrten Projekte wurde der Design Thinking Ansatz nach Hasso Plattner angewendet. Der Design Thinking Prozess wurde in jeder Fallstudie durchlaufen. In der ersten Phase („Verstehen") erfolgte eine intensive Auseinandersetzung mit den jeweiligen Design Challenges. Anschließend wurden in der zweiten Phase („Beobachten") Nutzerbed{\"u}rfnisse durch Interviews identifiziert. Die dritte Phase („Standpunkt definieren") diente der systematischen Verdichtung dieser Erkenntnisse zu spezifischen Problemperspektiven. In der vierten Phase („Ideen finden") wurden zahlreiche kreative und innovative L{\"o}sungskonzepte generiert. Diese wurden in der f{\"u}nften Phase („Prototyp entwickeln") zu greifbaren und testf{\"a}higen Prototypen ausgearbeitet. Die erfolgreiche Anwendung der Design Thinking Methode manifestierte sich in den Ergebnissen aller drei Projektgruppen. Das Team des PV Reinigungssystems entwickelte einen Funky Prototyp eines Reinigungsroboters. Die Gruppe des Floating PV Systems realisierte ein Modell eines funktionalen Prototypen mit intelligenter, sensorgesteuerter Sonnenstandsnachf{\"u}hrung zur Optimierung der Energieausbeute und Reduzierung des Wartungsaufwands. Das Team der nachhaltigen mobilen Parkbox pr{\"a}sentierte ein modulares Design mit integrierter Ladefunktion, das sowohl Sicherheits- als auch Komfortbed{\"u}rfnisse adressierte. Die Anwendung dieser Methode in komplexen Entwicklungsprojekten erweist sich als besonders wertvoll, da sie theoretische Konzepte durch praktische Erfahrung vermittelt. Die Ergebnisse dieses Projekts liefern sowohl praktische Erkenntnisse als auch methodische Anregungen f{\"u}r zuk{\"u}nftige Forschungs- und Entwicklungsarbeiten im Bereich der Energietechnik Innovationen und f{\"o}rdern gleichzeitig den Wissensaustausch zwischen akademischer Forschung und industrieller Praxis.}, subject = {Design Thinking; Renewable energies; Erneuerbare Energien; Produktionswirtschaft; Production management; Energy technology; Design Thinking; Produktinnovation; Energietechnik; Erneuerbare Energien}, language = {de} } @misc{CamargodaSilva2025, type = {Master Thesis}, author = {Camargo da Silva, Thayn{\´a}}, title = {Extracting knowledge graphs from user stories using LangChain}, doi = {10.26127/BTUOpen-7038}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70382}, school = {BTU Cottbus - Senftenberg}, year = {2025}, abstract = {Requirements engineering is a fundamental component in software engineering since it defines the software from the user's perspective. In this context, user stories play a crucial role since they are simple, natural language descriptions of software requirements, and they are widely utilized in the industry, along with the agile development methodology. User stories, while valuable for capturing individual functionalities, offer a limited perspective of the overall system, hindering maintainability and comprehension. To address these challenges, extracting structured information and modeling user stories is crucial. Knowledge graphs offer a promising approach by providing a visual and structured representation of user stories, facilitating data storage and analysis, and reducing manual effort retrieval, leading to a more coherent and manageable system. Several methodologies to model stories employ Natural Language Processing (NLP) techniques, presenting limited precision, complex implementation, and difficulties to interpret a sentence [47]. Recent research has explored using large language models, such as ChatGPT-3.5 [1], to extract knowledge graph components (nodes and relationships) from user stories. However, the solution relies on specific models and lacks comprehensive data processing pipelines for constructing knowledge graphs. LangChain, a model-agnostic framework, is a promising tool that empowers the development of applications centered around large language models. Its adaptability extends to knowledge graph construction, facilitating the extraction of structured information from textual data and seamless integration with graph databases. This thesis introduces a novel methodology for the automated generation of knowledge graphs from user stories by leveraging the advanced capabilities of Large Language Models (LLMs). Utilizing the LangChain framework as a basis, the UserStoryGraph- Transformer (USGT) module was developed to extract nodes and relationships from user stories using an LLM to construct accurate knowledge graphs. This innovative technique was implemented in a script to fully automate the knowledge graph extraction process. Additionally, the evaluation was automated through a dedicated evaluation script, utilizing an annotated dataset for assessment. By enhancing the visualization and understanding of user requirements and domain concepts, this method fosters better alignment between software functionalities and user expectations, ultimately contributing to more effective and user-centric software development processes.}, subject = {Knowledge graph; Requirements engineering; Langchain; User story; Large language models; Neo4j; Wissensgraphen; Anforderungsanalyse; Anwendererz{\"a}hlung; Requirements engineering; Großes Sprachmodell; Wissensgraph}, language = {en} } @misc{OPUS4-7048, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,24 (12.06.2025)}, doi = {10.26127/BTUOpen-7048}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70488}, year = {2025}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Lehramt Primarstufe Mathematik-Sport (B.Ed.) vom 12. Juni 2025}, language = {de} } @misc{OPUS4-7047, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,23 (12.06.2025)}, doi = {10.26127/BTUOpen-7047}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70478}, year = {2025}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Lehramt Primarstufe Mathematik-Musik (B.Ed.) vom 12. Juni 2025}, language = {de} } @misc{OPUS4-7046, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2025,22 (12.06.2025)}, doi = {10.26127/BTUOpen-7046}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-70462}, year = {2025}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Lehramt Primarstufe Mathematik-Kunst (B.Ed.) vom 12. Juni 2025}, language = {de} }