@misc{Chatziandreou2024, type = {Master Thesis}, author = {Chatziandreou, Konstantinos}, title = {Climate governance in World Heritage cities}, doi = {10.26127/BTUOpen-6686}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66869}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {This study explores the interplay between the UNESCO status and climate governance in World Heritage cities. With climate change posing significant threats to living urban landscapes, local governments and public actors strive to implement sustainable and resilient strategies. However, complications arise when cities attain the World Heritage status, complicating climate governance practices. Qualitative research, involving interviews with key stakeholders from the Climate and Monument Protection Departments in L{\"u}beck, Regensburg, and Bamberg, reveals a negative impact of cultural heritage on climate governance. The study contends that, when harnessed effectively, cultural heritage can contribute to the sustainability and resilience of cities in addressing climate change. It emphasises the necessity for flexibility, collaboration, and a human-centric approach, advocating for a common understanding and prioritisation of human life within climate governance. In conclusion, this research underscores the importance of viewing heritage as a dynamic component integrated into cities' climate governance strategies.}, subject = {Climate change; Climate governance; Cultural heritage; UNESCO; World Heritage cities; Klimawandel; Klimagovernance; Kulturerbe; Welterbest{\"a}dte; Welterbe; Kulturerbe; Klimawandel; Klima{\"a}nderung; Stadtlandschaft; Governance}, language = {en} } @book{Kuennemann2022, author = {K{\"u}nnemann, Andreas}, title = {Existenz- und Regularit{\"a}tstheorie der zweidimensionalen Variationsrechnung mit Anwendungen auf das Plateausche Problem f{\"u}r Fl{\"a}chen vorgeschriebener mittlerer Kr{\"u}mmung}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-658-41640-9}, doi = {10.1007/978-3-658-41641-6}, publisher = {BTU Cottbus - Senftenberg}, pages = {247}, year = {2022}, abstract = {Die vorliegende Arbeit behandelt f{\"u}r eine breite Klasse zweidimensionaler Variationsprobleme eine Existenz- und Regularit{\"a}tstheorie, die der L{\"o}sung von Randwertproblemen partieller Differentialgleichungssysteme dient. Dabei werden bekannte Ergebnisse gr{\"u}ndlich untersucht und umfassend aufgearbeitet. Teilweise wird eine geeignete Anpassung der Voraussetzungen einiger Resultate vorgenommen. Speziell wird die Theorie auf das Plateausche Problem f{\"u}r Fl{\"a}chen vorgeschriebener mittlerer Kr{\"u}mmung im R3 angewendet. Eingangs wird das Konzept der direkten Methoden der Variationsrechnung erl{\"a}utert. {\"U}ber einen fundamentalen Satz zur schwachen Unterhalbstetigkeit von Funktionalen wird die Existenz eines Minimierers f{\"u}r eine breite Klasse von Variationsproblemen nachgewiesen. Da die Existenztheorie in Sobolev-R{\"a}umen agiert, sind Untersuchungen zur Regularit{\"a}t eines Minimierers notwendig. Im Rahmen der Regularit{\"a}tstheorie wird das Dirichletsche Wachstumstheorem von Morrey gezeigt, welches ein hinreichendes Kriterium f{\"u}r die H{\"o}lder-Stetigkeit einer Funktion X ∈ W1,2(G) liefert. Zum Nachweis der Anwendbarkeit des Dirichletschen Wachstumstheorems auf einen Minimierer wird ein Wachstumslemma verwendet. Dabei werden eine Verkn{\"u}pfung des Dirichlet-Integrals mit Fourierreihen sowie das Dirichlet- Integral der harmonischen Ersetzung einer Funktion mit L2-Randwerten genutzt. Infolgedessen ergibt sich die H{\"o}lder-Stetigkeit im Inneren f{\"u}r einen Minimierer. Zudem wird die Stetigkeit des Minimierers bis zum Rand gezeigt, sodass die Existenz eines stetigen Minimierers f{\"u}r eine breite Klasse von Variationsproblemen gesichert ist. Anschließend erfolgt die Berechnung der ersten Variation sowie die damit verbundene Herleitung der schwachen Euler-Lagrange-Gleichung, welche eine Beziehung zur L{\"o}sungstheorie von Differentialgleichungen im Sinne des Dirichletschen Prinzips herstellt. Ausgehend von der schwachen Euler-Lagrange-Gleichung wird die H{\"o}lder-Stetigkeit der ersten Ableitungen eines Minimierers bewiesen. F{\"u}r die L{\"o}sung von Randwertproblemen mit partiellen Differentialgleichungen zweiter Ordnung mithilfe der Variationsrechnung ist der Nachweis stetiger zweiter Ableitungen des Minimierers notwendig. Dabei wird der Fokus auf sogenannte Minimierer vom Poissonschen Typ gelegt. Eine C2,σ-Rekonstruktion, die auf der Schaudertheorie basiert, liefert in diesem Fall die gew{\"u}nschte Regularit{\"a}t. In Anwendung dessen werden das Randwertproblem harmonischer Abbildungen in Riemannschen R{\"a}umen sowie das Dirichletproblem des H-Fl{\"a}chen-Systems behandelt, indem jeweils ein geeignetes Variationsproblem aufgestellt wird. Als Erweiterung des Dirichletproblems des H-Fl{\"a}chen-Systems wird das allgemeine Plateausche Problem f{\"u}r Fl{\"a}chen vorgeschriebener mittlerer Kr{\"u}mmung mit den erarbeiteten Methoden der Variationsrechnung untersucht. Zudem wird das Plateausche Problem f{\"u}r Fl{\"a}chen vorgeschriebener mittlerer Kr{\"u}mmung in Kugeln, in Zylindern sowie insbesondere im Einheitskegel gel{\"o}st. Insgesamt wird eine ausf{\"u}hrliche, in sich geschlossene und gut verst{\"a}ndliche Existenzund Regularit{\"a}tstheorie der zweidimensionalen Variationsrechnung zur Behandlung von Randwertproblemen partieller Differentialgleichungssysteme dargestellt, welche sich in besonderer Weise bei der L{\"o}sung des Plateauschen Problems f{\"u}r Fl{\"a}chen vorgeschriebener mittlerer Kr{\"u}mmung entfaltet.}, subject = {Variationsrechnung; Variationsrechnung; Dimension 2; Mittlere Kr{\"u}mmung; Plateau-Problem; Partielle Differentialgleichungen; Plateausches Problem; Regularit{\"a}tstheorie; Morrey; Variation calculation; Partial differential equations; Plateau problem; Regularity theory}, language = {de} } @article{BoellmannMartienssen2024, author = {B{\"o}llmann, J{\"o}rg and Martienssen, Marion}, title = {Seasonal variability of cultivable nitrate-reducing and denitrifying bacteria and functional gene copy number in fresh water lake}, series = {microorganisms}, volume = {12}, journal = {microorganisms}, number = {3}, publisher = {MDPI}, address = {Basel}, issn = {2076-2607}, doi = {10.3390/microorganisms12030511}, year = {2024}, abstract = {This study describes the seasonal course of denitrifying and nitrate-reducing bacteria in a dimictic mesotrophic lake (Lake Scharm{\"u}tzelsee, Brandenburg, Germany) within a three-year period from 2011 to 2013. The bacterial cell numbers were quantified by the fluorescence microscopy, most probable number (MPN) and PCR-dependent quantification of the chromosomal 16S rDNA and of the nirS and nirK gene copy number. The highest seasonal differences (up to three orders of magnitudes) have been measured usingMPNin the epilimnion. This variation was not reflected by PCR-dependent approaches or direct microscopical enumeration. At adverse conditions (low temperature and/or low nitrate concentrations), the differences between MPN and gene copy numbers increased by up to five orders of magnitudes and decreased to one magnitude at favourable environmental conditions. These results can be explained best by an increasing ratio of viable but not cultivable (VBNC) cells or dead cells at impairing conditions. In the hypolimnion, the courses of MPN and nir gene copy numbers were similar. This can be explained by a higher feeding pressure and therefore smaller amounts of dormant cells. In the pelagial in general, the total cell numbers enumerated by either microscopical or molecular approaches were similar. In the sediment, more than 99\% of the DNA was obviously not related to viable bacteria but was rather DNA in dead cells or adsorbed to particle surfaces.}, subject = {Denitrification; Nitrite reductase; Microscopical cell number; Hypolimnion; Dimictic lake; Denitrifikation; Nitrit-Reduktase; Mikroskopische Zellzahl; Dimiktischer See}, language = {en} } @book{Ceritoglu2023, author = {Ceritoglu, Erdogan Onur}, title = {Salvaging Buildings : reclaiming a livelihood from the excesses of Istanbul's mass urbanization}, publisher = {transcript}, address = {Bielefeld}, publisher = {BTU Cottbus - Senftenberg}, pages = {268}, year = {2023}, abstract = {Turkey's demolition waste management is, to a great extent, dependent on {\c{c}}{\i}kmac{\i}s (reclaimers) who salvage condemned buildings for raw materials and architectural elements. Its urbanization history is full of key moments marked by building demolitions, which became a necessary material resource for informal urbanization. As early as the 1970s, the {\c{c}}{\i}kmac{\i}s helped the gecekondus [squatter houses] by supplying second-hand building materials and construction loans. They managed to turn a lack of infrastructure into an advantage and remain very adaptable to the ever-changing conditions of neo-liberalized urbanization. They depend on solidarity networks and other informal resources. Assemblage thinking helps to redefine the concept of informality, understand the relational dynamics between various actors, and focus on the agency of materials. The empirical data gained from 'follow the thing' ethnographic research in Turkey and Georgia reveals the double lives of {\c{c}}{\i}kmac{\i}s who move between village and city. Additionally, by following the example of a reclaimed window frame's journey from Istanbul to Tbilisi, we can more clearly see the second-hand trade network in the context of urbanization and incremental architecture. In the context of waste's materiality, the empirical part of the research shows the symbiotic relationship between {\c{c}}{\i}kmac{\i}s and the discarded demolition materials.}, subject = {Architecture; Urbanisation; Building salvage; Informality; Turkey; Architektur; Urbanisierung; Bergung von Geb{\"a}uden; Informalit{\"a}t; T{\"u}rkei; Istanbul; Verst{\"a}dterung; Stadtentwicklung; Geb{\"a}ude; Abbruch; Bauabfall; Recycling}, language = {en} } @article{ZschechLechowskiKuturkovaetal.2024, author = {Zschech, Ehrenfried and Lechowski, Bartlomiej and Kuturkova, Kristina and Panchenko, Luliana and Kr{\"u}ger, Peter and Clausner, Andr{\´e}}, title = {Laboratory X-ray microscopy of 3D nanostructures in the hard X-ray regime enabled by a combination of multilayer X-ray optics}, series = {Nanomaterials}, volume = {14}, journal = {Nanomaterials}, number = {2}, publisher = {MDPI}, address = {Basel}, issn = {2079-4991}, doi = {10.3390/nano14020233}, year = {2024}, abstract = {High-resolution imaging of buried metal interconnect structures in advanced microelectronic products with full-field X-ray microscopy is demonstrated in the hard X-ray regime, i.e., at photon energies > 10 keV. The combination of two multilayer optics—a side-by-side Montel (or nested Kirkpatrick-Baez) condenser optic and a high aspect-ratio multilayer Laue lens—results in an asymmetric optical path in the transmission X-ray microscope. This optics arrangement allows the imaging of 3D nanostructures in opaque objects at a photon energy of 24.2 keV (In-Kα X-ray line). Using a Siemens star test pattern with a minimal feature size of 150 nm, it was proven that features < 150 nm can be resolved. In-Kα radiation is generated from a Ga-In alloy target using a laboratory X-ray source that employs the liquid-metal-jet technology. Since the penetration depth of X-rays into the samples is significantly larger compared to 8 keV photons used in state-of-the-art laboratory X-ray microscopes (Cu-Kα radiation), 3D-nanopattered materials and structures can be imaged nondestructively in mm to cm thick samples. This means that destructive de-processing, thinning or cross-sectioning of the samples are not needed for the visualization of interconnect structures in microelectronic products manufactured using advanced packaging technologies. The application of laboratory transmission X-ray microscopy in the hard X-ray regime is demonstrated for Cu/Cu6Sn5/Cu microbump interconnects fabricated using solid-liquid interdiffusion (SLID) bonding.}, subject = {X-ray microscopy; High-resolution radiography; Nanostructure; Advanced packaging; R{\"o}ntgenmikroskopie; Hochaufl{\"o}sende Radiographie; Nanostruktur; Erweiterte Verpackung; Nanostruktur; R{\"o}ntgenmikroskopie; Radiographie}, language = {en} } @article{RosenGribat2023, author = {Rosen, Christian and Gribat, Nina}, title = {Comparing hybrid urbanisms in the global south : water delivery configurations in Peru and Ghana}, series = {Urban Planning}, volume = {8}, journal = {Urban Planning}, number = {4}, publisher = {Cogitation}, address = {Lissabon}, issn = {2183-7635}, doi = {10.17645/up.v8i4.7155}, pages = {340 -- 350}, year = {2023}, abstract = {Urban development processes in the Global South (and North) are often described as characterized by formal and informal practices of different actors and their respective material realities. In critical urban studies, the disposition for this binary conception of formal and informal urbanisms has been discussed for many years. To a certain extent, these sometimes align rather problematically with contrasting notions of the "structural" versus the "everyday." In this article, we explore an understanding of formal and informal urban practices (and respectively "structure" and "everyday") as always interrelated, and we develop a methodology for a comparative examination of such hybrid urbanisms. In doing so, we address a missing link in the surging theoretical debate on comparative/southern urbanisms, which has rarely been substantiated by methodological explorations. The adapted concept of "delivery configurations" combines analyses of actor networks, material realities, rules and regulations, discourses, and heterogenous arrays of urban practices of negotiating these. However, bringing together local particularities and structural commonalities and exploring their interrelation only provides a basis for understanding case-specific complexities. We argue that embedding the analysis in a multi-scalar comparative framework can further its analytical rather than descriptive attributes and provide deeper insights into issues such as social inequality. To illustrate our methodological contribution, we provide first insights from a comparative research project of water delivery in different neighbourhoods in the secondary cities of Sunyani (Ghana) and Arequipa (Peru). We highlight the practical challenges of comparing diverse urban contexts and examining the rather complex relationships between infrastructure delivery, urban development, and social inequality.}, subject = {Water; Hybridity; Infrastructures; Multi-scalar comparison; Peru; Ghana; Wasser; Infrastruktur; Multiskalarer Vergleich; Infrastruktureinrichtungen}, language = {en} } @article{LeunerHirschl2023, author = {Leuner, Bruna and Hirschl, Bernd}, title = {Biomass and bioenergy perspectives of a coal region : status quo, potential and scenarios in Lusatia}, series = {Frontiers in Energy Research}, volume = {11}, journal = {Frontiers in Energy Research}, number = {1275733}, publisher = {Frontiers}, address = {Lausanne}, issn = {2296-598X}, doi = {10.3389/fenrg.2023.1275733}, year = {2023}, abstract = {Coal has been one of the main fuels used in Europe. Its decreasing role due to the ongoing transformation of the energy system will create significant socio-economic challenges. The switch into renewable energy systems could be an alternative to maintain jobs and economic activities within the affected regions. Biomass use and bioenergy can play an important role in the energy transition. Instead of energy crops, forest and agricultural residues should be used as biogenic energy sources in the future to avoid impacts on land use and food security. The main objective of this article is to investigate the biomass potential of a coal region and to provide scenarios for the future development of bioenergy production. Due to the changing framework conditions and, as a result, the different biomass focuses, previous bioenergy potential estimates must be reviewed. The methods for determining the potential of biomass for energy production was used for Lusatia (in German: Lausitz), the second largest coal region in Germany. These methods can also be applied in other regions. As a first step, the regional status quo assessment of cultivated areas and yields had decisive relevance for calculating biomass potential ranges. In a second step, the current bioenergy facilities in the region were identified, with a focus on power and heat production. The third step was the estimation of future regional bioenergy use. Therefore, the regional potential was gathered with the generally supra-regional framework conditions. For this purpose, national scenario studies were used, which contain the relevant target values and framework conditions. Two scenarios were developed for future bioenergy estimations: a conservative path based on the current policies and a progressive path, derived from the goal of climate neutrality by 2045. The results show a qualitative comparison among both scenarios and the previously determined potential ranges. Bioenergy can probably contribute to achieving climate neutrality with an increase in wood-fired systems, while agricultural bioenergy potential is likely to decline. In the discussion section, however, the uncertainty of these results is pointed out, as future use of bioenergy will be heavily influenced by the regulatory framework, competition with material use and the influences of climate change.}, subject = {Regional biomass potential; Bioenergy scenarios; Coal region; Regional energy transition; Lusatia; Regionales Biomassepotenzial; Bioenergieszenarien; Kohleregion; Regionale Energiewende; Lausitz}, language = {en} } @article{TomasMarinRodriguezCalcerradaArenasCastroetal.2023, author = {Tom{\´a}s Mar{\´i}n, Sergio de and Rodr{\´i}guez-Calcerrada, J{\´e}sus and Arenas-Castro, Salvador and Prieto, Iv{\´a}n and Gonz{\´a}lez, Guillermo and Gil, Luis and Riva, Enrique G. de la}, title = {Fagus sylvatica and Quercus pyrenaica : two neighbors with few things in common}, series = {Forest Ecosystems}, volume = {10}, journal = {Forest Ecosystems}, publisher = {Beijing Foresty University}, address = {Beijing}, issn = {2197-5620}, doi = {10.1016/j.fecs.2023.100097}, year = {2023}, abstract = {The Iberian Peninsula comprises one of the largest boundaries between Mediterranean and Eurosiberian vegetation, known as sub-Mediterranean zone. This ecotone hosts many unique plant species and communities and constitutes the low-latitude (warm) margin of numerous central European species which co-occur with Mediterranean vegetation. Two of the main species found in this region are the Eurosiberian European beech (Fagus sylvatica L.) and the Mediterranean Pyrenean oak (Quercus pyrenaica Willd.). It remains unclear how the different physiological and adaptive strategies of these two species reflect their niche partitioning within a sub-Mediterranean community and to what extent phenotypic variation (intraspecific variability) is driving niche partitioning across Eurosiberian and Mediterranean species. We quantified functional niche partitioning, based on the n-dimensional hypervolume to nine traits related to resource acquisition strategies (leaf, stem and root) plus relative growth rate as an additional whole-plant trait, and the environmental niche similarity between Pyrenean oak and European beech. Further, we analyzed the degree of phenotypic variation of both target species and its relationship with relative growth rates (RGR) and environmental conditions. Plant recruitment was measured for both target species as a proxy for the average fitness. Species' functional space was highly segregated (13.09\% overlap), mainly due to differences in niche breadth (59.7\%) rather than niche replacement (25.6\%), and beech showed higher trait variability, i.e., had larger functional space. However, both species shared the environmental space, i.e., environmental niches were overlapped. Most plant traits were not related to abiotic variables or RGR, neither did RGR to plant traits. Both target species share similar environmental space, however, show notably different functional resource-use strategies, promoting a high complementarity that contributes to maintaining a high functionality in sub-Mediterranean ecosystems. Therefore, we propose that conservation efforts be oriented to preserve both species in these habitats to maximize ecosystem functionality and resilience.}, subject = {Environmental niche; European beech; Forest dynamics; Functional niche; Pyrenean oak; {\"O}kologische Nische; Europ{\"a}ische Buche; Walddynamik; Funktionelle Nische; Pyren{\"a}en-Eiche; Iberische Halbinsel; {\"O}koton; {\"O}kologische Nische; Rotbuche; Pyren{\"a}eneiche; Artenschutz; {\"O}kosystem}, language = {en} } @article{TomasMarinGalanDiazRodriguezCalcerradeetal.2023, author = {Tom{\´a}s Mar{\´i}n, Sergio de and Gal{\´a}n D{\´i}az, Javier and Rodr{\´i}guez-Calcerrade, J{\´e}sus and Prieto, Iv{\´a}n and Riva, Enrique G. de la}, title = {Linking functional composition moments of the sub-mediterranean ecotone with environmental drivers}, series = {Frontiers in Plant Science}, volume = {14}, journal = {Frontiers in Plant Science}, publisher = {Frontiers}, address = {Lausanne}, issn = {1664-462X}, doi = {10.3389/fpls.2023.1303022}, year = {2023}, abstract = {Functional trait-based approaches are extensively applied to the study of mechanisms governing community assembly along environmental gradients. These approaches have been classically based on studying differences in mean values among species, but there is increasing recognition that alternative metrics of trait distributions should be considered to decipher the mechanisms determining community assembly and species coexistence. Under this framework, the main aim of this study is to unravel the effects of environmental conditions as drivers of plant community assembly in sub-Mediterranean ecotones. We set 60 plots in six plant communities of a sub-Mediterranean forest in Central Spain, and measured key above- and belowground functional traits in 411 individuals belonging to 19 species, along with abiotic variables. We calculated community-weighted mean (CWM), skewness (CWS) and kurtosis (CWK) of three plant dimensions, and used maximum likelihood techniques to analyze how variation in these functional community traits was driven by abiotic factors. Additionally, we estimated the relative contribution of intraspecific trait variability and species turnover to variation in CWM. The first three axes of variation of the principal component analyses were related to three main plant ecological dimensions: Leaf Economics Spectrum, Root Economics Spectrum and plant hydraulic architecture, respectively. Type of community was the most important factor determining differences in the functional structure among communities, as compared to the role of abiotic variables. We found strong differences among communities in their CWMs in line with their biogeographic origin (Eurosiberian vs Mediterranean), while differences in CWS and CWK indicate different trends in the functional structure among communities and the coexistence of different functional strategies, respectively. Moreover, changes in functional composition were primarily due to intraspecific variability. We observed a high number of strategies in the forest with the different communities spreading along the acquisitive-conservative axis of resource-use, partly matching their Eurosiberian-Mediterranean nature, respectively. Intraspecific trait variability, rather than species turnover, stood as the most relevant factor when analyzing functional changes and assembly patterns among communities. Altogether, our data support the notion that ecotones are ecosystems where relatively minor environmental shifts may result in changes in plant and functional composition.}, subject = {Mixed-species forest; Sub-mediterranean; Ecotone; Functional structure; Intraspecific variability; {\"O}koton; Funktionelle Struktur; Intraspezifische Variabilit{\"a}t; Artengemischter Wald; Submediterran; Spanien; Meseta; {\"O}koton; Wald; Pflanzengesellschaft; Umweltver{\"a}nderung; Maximum-Likelihood-Technik}, language = {en} } @article{Yadollahi2020, author = {Yadollahi, Solmaz}, title = {Reflections on the past and future of urban conservation in Iran}, series = {Built heritage}, volume = {4}, journal = {Built heritage}, number = {19}, publisher = {Springer}, address = {Heidelberg}, issn = {2662-6802}, doi = {10.1186/s43238-020-00019-1}, year = {2020}, abstract = {The material authenticity of cultural heritage has been questioned by societies in which the modern paradigm of conservation has not developed from within the native culture. This paper examines the philosophical and practical traditions in Iran regarding the materiality and authenticity of past structures. By reviewing the emergence of the Western conservation paradigm in Iran, this paper highlights two key factors: the rapidness of this paradigm shift and the remarkable contradiction between the new and old paradigms. By borrowing the Deleuzo-Guattarian concept of a 'body without organs' (BwO), this paper problematises the rapidness and radicality of the paradigm shift in Iran. It suggests exploring the under-investigated possibilities between the pre-modern and modern paradigms to address the gap between native circumstances and Western standards.}, subject = {Cultural heritage; Authenticity; Iran; Conservation; Kulturelles Erbe; Authentizit{\"a}t; Denkmalschutz; Iran; Kulturerbe; Stadt; Denkmalpflege; Denkmalschutz; Authentizit{\"a}t; Materialit{\"a}t}, language = {en} } @book{Yadollahi2023, author = {Yadollahi, Solmaz}, title = {Urban heritage planning in Tehran and beyond : sequences of disrupted spatial-discursive assemblages}, publisher = {transcript}, address = {Bielefeld}, isbn = {978-3-8394-7162-3}, doi = {10.1515/9783839471623}, publisher = {BTU Cottbus - Senftenberg}, pages = {268}, year = {2023}, abstract = {Despite the impact of ideological rigidity, the primary challenge of heritage planning in Tehran and beyond lies not in the dominance of an inflexible Authorized Heritage Discourse, but rather in the absence of stable spatial-discursive and administrative structures. Solmaz Yadollahi maps the historical trajectory of conservation and urban heritage planning in Iran, depicting a discursive-spatial assemblage that tends to knock down its accumulated resources. This is in line with Katouzian's portrayal of Iran as a pick-axe society. Residing within this society, the studied assemblage strives to deconstruct the prevailing structures and usher in a fresh one, paradoxically perpetuating the very cycle it seeks to escape.}, subject = {Assemblage theory; Urban studies; Urban heritage; Qualitative social research; Iran; Assemblage Theorie; Qualitative Sozialforschung; Stadtforschung; St{\"a}dtisches Kulturerbe; Iran; Territorialstaat; Stadtverwaltung; Qualitative Sozialforschung; Kulturerbe; Denkmalpflege; Teheran; Sozialraum; Altstadtsanierung; Baudenkmal}, language = {en} } @article{DikraFellahBarilleetal.2023, author = {Dikra, Bouras and Fellah, Mamoun and Barille, Regis and Weiß, Sabine and Samad, Mohammed Abdul and Alburaikan, Alhanouf and Khalifa, Hamiden Abd El-Wahed and Obrosov, Aleksei}, title = {Improvement of photocatalytic performance and sensitive ultraviolet photodetectors using AC-ZnO/ZC-Ag2O/AZ-CuO multilayers nanocomposite prepared by spin coating method}, series = {Journal of science: advanced materials and devices}, volume = {9}, journal = {Journal of science: advanced materials and devices}, number = {1}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2468-2179}, doi = {10.1016/j.jsamd.2023.100642}, year = {2023}, abstract = {Morphological and optical properties of a multilayer film (CAZO/CZAO/ZACO) prepared by spin-coating method and deposited on a glass substrate were evaluated. The study was initially carried out for each layer, individually and then as a multilayer subsequently. Structural properties using X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), infrared spectra (IR) and X-ray photoelectron Spectroscopy (XPS) showed the presence of three phases of zinc, copper and silver oxides at different levels. The CZAO sample observed with scanning electron microscope (SEM) showed an excellent porous surface with a large deformation in the multilayer configuration. Doping with zinc and copper in the silver crystal lattice improved the crystal structure and reduced the optical energy gap, thus increasing the optical absorbance and refractive index. The dielectric constants and showed an increase in the optical polarization values for lower photonic energies. The maximum degradation rate for photocatalysts of methylene blue was 89 \% for a 5-h exposure period with CAZO/CZAO/ZACO while it reached 71 \% for the CZAO sample during the same time period. The sensitivity of samples to light proved that the presence of ultraviolet radiation increases the number of holes trapped by oxygen ions and causes more free electrons and contribute to a better production of photocurrent than in darkness.}, subject = {Multilayer CAZO/CZAO/ZACO; Photocatalysis; Photodetector; Nanostructures; Nanocomposites; Multilagenbeschichtung CAZO/CZAO/ZACO; Rotationsbeschichtung; Photokatalyse; Nanostrukturen; Nanokompositen; Nanokomposit; Mehrschichtsystem; Beschichtung; Fotokatalyse; Photodetektor}, language = {en} } @misc{OPUS4-6495, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2024,04 (22.03.2024)}, doi = {10.26127/BTUOpen-6495}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64957}, year = {2024}, abstract = {1. Zweite {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Biotechnologie (B. Sc.) vom 15. M{\"a}rz 2024 2. Lesefassung: Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Biotechnologie (B. Sc.) vom 30. Juli 2018 (AMbl. 15/2018) i. d. F. der Zweiten {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Biotechnologie (B. Sc.) vom 15. M{\"a}rz 2024}, language = {de} } @misc{OPUS4-6494, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2024,03 (22.03.2024)}, doi = {10.26127/BTUOpen-6494}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64946}, year = {2024}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Micro- and Nanoelectronics vom 15. M{\"a}rz 2024}, language = {de} } @misc{OPUS4-6493, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2024,02 (20.03.2024)}, doi = {10.26127/BTUOpen-6493}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64934}, year = {2024}, abstract = {1. Erste {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Medizintechnik vom 15. M{\"a}rz 2024 2. Lesefassung: Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Medizintechnik vom 04. Oktober 2022 i. d. F. der ersten {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Medizintechnik vom 15. M{\"a}rz 2024}, language = {de} } @misc{OPUS4-6492, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2024,01 (19.03.2024)}, doi = {10.26127/BTUOpen-6492}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64920}, year = {2024}, abstract = {Semesterticketsatzung der Studierendenschaft der Brandenburgischen Technischen Universit{\"a}t Cottbus-Senftenberg vom 12. M{\"a}rz 2024}, language = {de} } @phdthesis{Shevchenko2024, author = {Shevchenko, Iaroslav}, title = {Ein Beitrag zum Online-Monitoring von Teilentladungen in Betriebsmitteln des H{\"o}chstspannungsnetzes}, doi = {10.26127/BTUOpen-6629}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66294}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Mit der zunehmenden Nutzung von Hochspannungs-Stromkabeln, insbesondere durch das Aufkommen langer HVDC(HG{\"U})-Leitungen, entsteht die Notwendigkeit, ihren Zustand sensibel zu {\"u}berwachen, etwa durch die Verfolgung der Entstehung und Entwicklung von Teilentladungen. Diese Studie zeigt, dass bestehende L{\"o}sungen schlecht auf den Fall von HVDC-Leitungen zugeschnitten sind und dass ein neues, ausgekl{\"u}gelteres {\"U}berwachungssystem eine Vielzahl von unterschiedlichen Problemen angehen muss. Zun{\"a}chst wird ein {\"U}berblick {\"u}ber die Aufgabe und die Hauptfunktionsbl{\"o}cke des {\"U}berwachungssystems gegeben. Anschließend werden ausgew{\"a}hlte Bl{\"o}cke in den folgenden Kapiteln detailliert untersucht. Der erste dieser Bl{\"o}cke, ein Hochfrequenz-Stromtransformator, ist daf{\"u}r verantwortlich, das Signal in der Stromleitung zu erfassen und an die Elektronik weiterzuleiten. Diese Komponente erh{\"a}lt eine ausf{\"u}hrliche Behandlung: allgemeine Design{\"u}berlegungen, Berechnung der Streuinduktivit{\"a}t, Betrieb in Anwesenheit eines Leistungsstroms, Resonanzverhalten, ausgewogenes Design. Besonderes Augenmerk wird auf die Anwendung der Finite-Elemente-Analyse (FEA) in Bezug auf den Hochfrequenz-Stromtransformator (HFCT) gelegt. Die vorgestellten Techniken k{\"o}nnen jedoch auch auf andere magnetische Ger{\"a}te angewendet werden. Der letzte Abschnitt des Kapitels pr{\"a}sentiert verschiedene Entwicklungsstufen, experimentelle Aufbauten, Prototypmodelle und das endg{\"u}ltige Ger{\"a}t, das in Serienproduktion gegangen ist. Der n{\"a}chste Block befasst sich mit dem Problem der Signalextraktion aus dem Rauschen. Es wird eine Literaturanalyse durchgef{\"u}hrt, die sich auf die Rauschunterdr{\"u}ckung in Teilentladungsdaten bezieht, und die Anwendung des Signalabtrennungsansatzes basierend auf der linearen pr{\"a}diktiven Codierung wird gezeigt. Im Abschnitt {\"u}ber die Lokalisierung werden Beispiele f{\"u}r Probleme vorgestellt, die bei der Entwicklung eines Algorithmus zur Lokalisierung von Teilentladungen aufgetreten sind. In dem Kapitel, das den Labortests gewidmet ist, werden verschiedene Hilfsexperimente zusammengefasst, die w{\"a}hrend der Entwicklung des Systems durchgef{\"u}hrt wurden. Einige davon sind: TDR-basierte Leitungscharakterisierung, Sch{\"a}tzung der {\"U}berwachungsempfindlichkeit, Messung der Kabeld{\"a}mpfung und der Reflexionskoeffizienten der Zubeh{\"o}rteile. Im abschließenden Kapitel - den Feldtests - wird die Installation des Systems auf einer 110-kV-Leitung und die gemessene {\"U}bertragungsfunktion vorgestellt.}, subject = {High-frequency current transformer; Partial discharge; High voltage direct current; Underground cable; Finite element analysis; Stromwandler; Teilentladungen; Hochspannungs-Gleichstrom-{\"U}bertragung; Erdkabel; Finite-Elemente-Methode; Erdkabel; Hochspannungskabel; Hochspannungsgleichstrom{\"u}bertragung; Stromwandler; Finite-Elemente-Methode; Teilentladung}, language = {en} } @techreport{SchrammKleinFota2024, type = {Working Paper}, author = {Schramm-Klein, Hanna and Fota, Anne}, title = {Was macht Kleinst{\"a}dte f{\"u}r B{\"u}rger:innen attraktiv? : Analyse des Well-Being von Menschen in Kleinst{\"a}dten}, issn = {2940-6366}, doi = {10.26127/BTUOpen-6655}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66552}, year = {2024}, abstract = {Kleinst{\"a}dte stehen vor der Herausforderung, die Lebensqualit{\"a}t und die Lebenszufriedenheit ihrer Bewohner:innen zu verbessern. Dabei sind subjektive Wahrnehmungen oft wichtiger als objektive Maßst{\"a}be. Im Rahmen dieser Studie werden deshalb die Attraktivit{\"a}tsfaktoren von Kleinst{\"a}dten untersucht, die dazu beitragen, die Lebensqualit{\"a}t der B{\"u}rger:innen zu f{\"o}rdern. Um ein realistisches Bild auf die Anforderungen der Bewohner:innen zu erhalten, ist es wesentlich, die tats{\"a}chlichen Aktivit{\"a}tsr{\"a}ume der Kleinstadt-Bewohner:innen zu betrachten. Mit Blick auf die individuelle Beurteilungs- und Einstellungsebene der B{\"u}rger:innen wird deshalb eine erweiterte geografisch-r{\"a}umliche Perspektive eingenommen. F{\"u}r B{\"u}rger:innen ist im Rahmen ihres Well-Beings der Raum entscheidend, in dem sie sich normalerweise bewegen. Ihr Radius {\"u}berschreitet dabei typischerweise die Grenzen der eigenen Kleinstadt und bezieht das n{\"a}here regionale Umfeld mit ein. Vor diesem Hintergrund wurde in dem Projekt die Frage adressiert, wie die spezifischen Eigenschaften von Kleinst{\"a}dten sowie ihr regionales Umfeld die Lebensqualit{\"a}t und Zufriedenheit ihrer Bewohner:innen im Vergleich zu Großstadtbewohner:innen beeinflussen. Um diese Frage zu beantworten, wurde eine Kombination aus qualitativer und quantitativer Forschung angewendet. Im ersten Schritt wurden zwei Fokusgruppendiskussionen in einer dezentral gelegenen Kleinstadt bzw. einer zentral gelegenen Kleinstadt durchgef{\"u}hrt. Im zweiten Schritt erfolgte eine quantitativ orientierte Fragebogenstudie in diesen beiden Kleinst{\"a}dten und in einer Vergleichs-Großstadt, bei der insgesamt 1.144 Personen befragt wurden. Dabei wurden Daten zur Attraktivit{\"a}t der St{\"a}dte, ihres regionalen Umfelds und zur Lebensqualit{\"a}t und Zufriedenheit der Bewohner:innen von Kleinst{\"a}dten im Vergleich zu Großst{\"a}dten erhoben und analysiert. Die Ergebnisse der Studie zeigen, dass B{\"u}rger:innen sowohl lokale als auch regionale Angebote nutzen und sich v.a. im Hinblick auf Bed{\"u}rfnisse des Alltags und der (Grund-) Versorgung Angebote in der N{\"a}he ihres Wohnorts w{\"u}nschen. Die untersuchten Kleinst{\"a}dte weisen dabei in Bezug auf Qualit{\"a}tsfaktoren wie z.B. die Umwelt- und Wohnqualit{\"a}t eine h{\"o}here Attraktivit{\"a}t aus Sicht der eigenen Bewohner:innen auf als die betrachtete Großstadt. Die Studie hat gezeigt, dass Kleinst{\"a}dte durch die Nutzung regionaler Ressourcen und die Integration digitaler M{\"o}glichkeiten eine hohe Lebensqualit{\"a}t bieten k{\"o}nnen, obwohl sie selbst nicht immer alle ben{\"o}tigten Angebote vorhalten k{\"o}nnen und dass die Lebenszufriedenheit in den Kleinst{\"a}dten zum Teil h{\"o}her ist als in der betrachteten Vergleichs-Großstadt. Gerade zentral gelegene Kleinst{\"a}dte k{\"o}nnen dabei von der N{\"a}he zu gr{\"o}ßeren St{\"a}dten und den damit verbundenen Vorteilen profitieren. Langfristig spielt auch die Digitalisierung eine Rolle, indem sie den Zugang zu entfernten Dienstleistungen und Produkten erleichtert und bestehende Nachteile von Kleinst{\"a}dten mit Blick auf ihre Ausstattung abmildern kann.}, subject = {Lebensqualit{\"a}t in Kleinst{\"a}dten; B{\"u}rgerzufriedenheit; Regionale Einfl{\"u}sse auf B{\"u}rger:innen; Kleinstadtattraktivit{\"a}t; Quality of life in small towns; Citizen satisfaction; Regional influences on residents; Small town attractiveness; Kleinstadt; Lebensqualit{\"a}t; Zufriedenheit; Wohlbefinden; Empirische Forschung}, language = {de} } @techreport{HerzogBoehmeBurbaetal.2024, author = {Herzog, Anja and B{\"o}hme, Simone and Burba, Stefan and Hirche, Nadine and J{\"a}nchen, Jeannette and Kunz-Rogalla, Harald and Loehr, Katharina and Netzker, Nina and Schmitz, Gabriela and Simmank, Peggy}, title = {Handreichung f{\"u}r Praxisanleiter_innen zur Begleitung berufspraktischer Studienphasen}, doi = {10.26127/BTUOpen-6630}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66300}, year = {2024}, abstract = {Die Basis der gegenw{\"a}rtigen und zuk{\"u}nftigen pflegerischen Entwicklung wurzelt im fortlaufenden Prozess der Aktion und Reflexion. Der Dialog zwischen „Praxis" und „Theorie" als Fundament der Begegnung mit anderen und sich selbst, mit denen t{\"a}glich auf implizite, intuitive und tazide Wissensbest{\"a}nde zur{\"u}ckgegriffen wird, in der die Kunst darin besteht, sich reflektierend Wissens- und Erfahrungsbest{\"a}nden anzun{\"a}hern. In einer Pflegewelt, in denen Praxisanleiter_innen im WIR-DU-ICH sich unserer Verantwortung bewusst sind, in denen Du die pflegerischen Situationen einsch{\"a}tzt und ich als Praxisanleiter_in mit dem Team p{\"a}dagogische Prozesse mit ausgestalte, als mein gesellschaftlicher pflegerischer Auftrag, mit dem Ziel Menschen in den jeweiligen Lebensphasen begleiten zu k{\"o}nnen. Praxisanleiter_innen reflektieren „Selbstverst{\"a}ndliches" w{\"a}hrend ihrer pflegerischen Beziehungsgestaltung mit dem zu Pflegenden, so dass die angehenden Pflegenden, Anhaltspunkte in konkreten pflegerischen Situationen f{\"u}r die Entscheidungsprozesse erhalten. Mit dem zugrundeliegenden Subjektverst{\"a}ndnis einer demokratischen Bildungsarbeit verstehen sich alle Beteiligten als sich stetig entwickelnd. Exemplarische Grundlage der Bildungsarbeit bieten die 10-j{\"a}hrigen Erfahrungsbest{\"a}nde in der Bildungspraxis an einer brandenburgischen Hochschule, die illustriert wie sich bspw. die Studierenden, die Praxisbegleiter_innen und die Praxisanleiter_innen auf den Lernort „Praxis" vorbereiten, so dass Kompetenzen gef{\"o}rdert und gest{\"a}rkt werden. Mit einer Vision der Zukunft schließt der gegenw{\"a}rtige Entwicklungsprozess aller Beteiligten mit der Handreichung f{\"u}r Praxisanleiter_innen zur Begleitung berufspraktischer Studienphasen ab. Das Schreiben ist formell abgeschlossen, aber der informelle Dialog wird fortgesetzt, um die aktuelle Situation aufrechtzuerhalten.}, subject = {Berufliches Selbstverst{\"a}ndnis; Bildungsprozess; Erfahrungslernen; Implizites Wissen; Praxisanleitung; Pflegepraxis; Educational process; Experiential learning; Implicit knowledge; Nursing practice; Practical guidance; Berufsp{\"a}dagogik; Berufspraxis; Handlungsorientiertes Lernen; Informelles Lernen}, language = {de} } @phdthesis{Petryk2024, author = {Petryk, Dmytro}, title = {Investigation of sensitivity of different logic and memory cells to Laser Fault Injections}, doi = {10.26127/BTUOpen-6664}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66647}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Plenty of semiconductor devices are developed to operate with private data. To guarantee data privacy cryptographic algorithms are used, where the secrecy is based on the used keys. Theoretically, the cryptographic algorithms using keys with recommended lengths are secure. The issue is that a potential attacker can steal the devices and attack in a lab. Physical attacks are usually aimed to perturb normal operation of a device and to extract cryptographic keys, e.g. by means of fault injection (FI). One class of FI attacks exploits the sensitivity of semiconductor devices to light and are performed using a laser as the light source. This work investigates the sensitivity of different logic and memory cells to optical Fault Injection attacks. Front-side attacks against cells manufactured in different IHP technologies were performed using two different red lasers controlled by Riscure software. To reach the repeatability of the experimental results and to increase the comparability of the results with attack results published in literature the setup parameters as well as setting parameters of the Riscure software were experimentally evaluated. Attacks were performed against inverter, NAND, NOR, flip-flop cells from standard libraries, radiation-hard flip-flops based on Junction Isolated Common Gate technique, radiation-tolerant Triple Modular Redundancy registers as well as non-volatile Resistive Random Access Memory (RRAM) cells. The results of attacks against volatile circuits were successful transient bit-set and bit-reset as well permanent stuck-at faults. The results of attacks against RRAM cells were successful in the sense that manipulation of all RRAM logic states was feasible. The faults injected during the performed experiments were repeatable and reproducible. The goal of this work was not only to achieve successful FI but also to determine cell area(s) sensitive to laser illumination. Knowledge about areas sensitive to laser illumination can be used by designers to implement corresponding countermeasure(s) at the initial stage of chip development and is the necessary step to design appropriate countermeasures. For example, metal fillers can be applied as optical obstacles reducing the success of front-side FI attacks, i.e. as a possible low-cost countermeasure. Based on the knowledge of the sensitive cell areas, the placement of the metal fillers can be automated in the future, i.e. the findings given in the work can serve as a basis for a methodology development for improving resistance against optical FI attacks at the initial stage of chip development. Such methodology can be adapted for each chip manufacturing technology.}, subject = {Laser fault injection attacks; Resistive random access memory; Cell sensitive areas; Radiation-hard cells; Countermeasure; Laserfehlerinjektion-Angriffe; Resistiver Direktzugriffsspeicher; Empfindliche Zellbereiche; Strahlungsharte Zellen; Gegenmaßnahme; Halbleiter; Speicherzelle; Datenschutz; Kryptologie; Algorithmus}, language = {en} } @phdthesis{SienraIracheta2023, author = {Sienra Iracheta, Estibaliz}, title = {The 'cultural appropriation' of traditional textiles from Mexico : an analysis of 3 case studies}, doi = {10.26127/BTUOpen-6612}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66120}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {This doctoral thesis intended to examine the phenomenon of 'cultural appropriation' of traditional textiles from Mexico through an analysis of 3 case studies. This research had the objective of understanding the phenomenon through the relationships, perspectives, and discourses of the social actors involved, by following the development of controversies involving different objects of material culture from different communities: the xaam n{\"i}xuy Ayuujk (Mixe) blouse from Santa Maria Tlahuitoltepec, Oaxaca; the H{\~n}uh{\´u} and H{\~n}ah{\~n} (Otomi) "Tenango" embroideries from the communities of Tenago de Doria and San Nicolas in Hidalgo; and the mestizo gabanes from Santa Clara del Cobre and Nahuatzen in the State of Michoac{\´a}n. This doctoral examination was sustained through theoretical approximations that located the occurrences within transnational/ transcultural processes, engaging with qualitative methodologies and multi-sited ethnographies in order to obtain data that elucidated on the diversity of objects, actors, relationships, understandings, perceptions, values, and discourses involved in the 'cultural appropriation' of traditional textiles controversies in the country. The content analysis of this doctoral research dissected a number of different processes, effects, and consequences of the phenomenon as it developed in dissimilar locations and periods of time. The examination revealed a complex intersection of meanings, productions, circulations, and consumptions of culture, that simultaneously affected cultural meanings, relationships, and processes, raising concerns over the management of traditional textiles as objects of cultural heritage, and the unviability of protecting communal creative domains through national legal mechanisms.}, subject = {Cultural heritage studies; Cultural appropriation; Traditional textiles; Transculturation; Cultural rights; Kulturelle Aneignung; Traditionelle Textilien; Kunsthandwerk; Transkulturation; Kulturelle Rechte; Mexiko; Kunsthandwerk; Textilien; Kultur{\"u}bertragung; Kulturelle Rechte}, language = {en} } @phdthesis{Roszak2023, author = {Roszak, Robert}, title = {Fluid structure interaction analysis considering the structural behavior}, doi = {10.26127/BTUOpen-6662}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66629}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {The development of computer technologies allows using numerical simulations in the early stages of aircraft design more and more often. The role of both wind tunnels and initial test flights used to validate of solutions seems to be diminishing. Big systems for three-dimensional simulations of Fluid-Structure Interactions (FSI) constitute highly specialized and costly software. Most of the codes are based on many simplifications. One of them is the assumption of linearity of the structural model being in contradiction with real-life situations. The postdoctoral dissertation presents the results of simulations for complex, multi-scale objects and non-linear structure models and extended structure testing in relation to damage in macroscale analysis. What is crucial for carrying out the assumed analyses is to extend a numerical tool comprising a flow and a structural program and a space grid deformation model for a system allowing to take into consideration the non-linearity of the structure. The point of reference for testing the suggested approaches are the existing solutions of the aeroelastic linear problems. Results of the recent research might be applied for the construction of increasingly common unmanned aerial vehicle (UAV). Modern structure is a key element that affects the basic parameters as mass or range of these vehicles. Until now the research and development of the aeroelastic calculation algorithm for commonly used materials in the framework of linear geometry and linear-elastic material behavior was used. The current developments of materials for light-weight design common use of 3D printing technology causes the increasingly widespread use of new alternative materials in the aviation industry. This is particularly true for the design and construction of UAV, where the basic requirements are the lightness of the structure and the maximum range. Unfortunately, the fulfillment of the above criteria means that the materials used are often loaded not only in a elastic range but also more often above this limit. In case of analyzing aeroelastic phenomena for a loaded structure we should take a closer look at the behavior of the material outside the elastic range in which the damage occurs. The process of destroying in the face of such dangerous phenomena as flutter in aircraft constructions requires a deeper analysis of the mechanics of materials, in particular for new materials and their manufacturing techniques. As part of joint experiments and numerical simulations, detailed research was carried out to describe the behavior of printed materials, which will be increasingly used in the design of aircraft structures. Extending the postdoctoral dissertation with the research carried out at BTU will allow further development of the existing FSI algorithm, taking into account the structural behavior more accurately and the possibility of predicting damage processes.}, subject = {FSI; DMD; Material nonlinearity; Aeroelasticity; Materialnichtlinearit{\"a}t; Aeroelastizit{\"a}t; Dynamic mode decomposition; Fluid-structure interaction; Flugzeugbau; Aeroelastizit{\"a}t; Nichtlineares mathematisches Modell}, language = {en} } @phdthesis{Alhadad2023, author = {Alhadad, Esraa Fathy Abdelaziz}, title = {The contribution of community involvement in heritage management : a cultural mapping project}, doi = {10.26127/BTUOpen-6665}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66651}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Heritage has been lately the matter of debate regarding its definition, conservation and management approaches. In the last few years, there has been an increasing demand for the involvement of the local community in heritage management. Too often, the involvement perspectives of key stakeholders in general and the community members, in particular, are entirely different. While the theoretical ground of community involvement is somehow well set, heritage management has been slow in applying the involvement approach. Practically, it is not easy to find the balance to achieve all the goals of key stakeholders in any involvement project. Subsequently, there are a few numbers of empirical works on the practical implications of understanding heritage management effective tools and limited indication to convince recent 'power-holders' such as governmental organizations to distribute their power with local community members. This doctoral research project explores community involvement in heritage management as an effective solution to building a strong management system. The study aims to examine the level and the quality of involvement in the management of heritage sites in general through a cultural mapping-based approach. This is applied to a case study which is the Religious Complex in Historic Cairo World Heritage Site. The research outcomes indicate the importance of involving the local community in heritage management and planning processes. Ultimately, the study provides critical empirical evidence and draws valuable theoretical and practical assumptions that spread knowledge of cultural mapping in critical issues, such as the drivers of involvement and cooperative decision-making.}, subject = {Heritage management; Community involvement; Cultural mapping; Stakeholder management; Kulturerbe; Gemeinschaftseinbindung; Kulturelle Kartierung; Stakeholder-Management; Weltkulturerbe; Kulturmanagement; Partizipation}, language = {en} } @phdthesis{Andreessen2023, author = {Andreeßen, Lena M.}, title = {Towards real-world applicability of neuroadaptive technologies : investigating subject-independence, task-independence and versatility of passive brain-computer interfaces}, doi = {10.26127/BTUOpen-6652}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66521}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Brain-computer interfacing (BCI) is a relatively new field of study that involves engineering, neuroscience, psychology, and physiology. A BCI is a system that allows direct communication between the brain and the environment, using signals from electroencephalography (EEG) to identify a user's intentions and mental states. This can be used for human-machine interaction (HMI) to adapt software or control a device. Particularly passive BCIs are the most promising for the general population, as they can detect and interpret a user's mental state without requiring their attention. This can enable neuroadaptive technology (NAT), which allows a machine to learn over time how the user perceives and interprets the world. However, there are still obstacles to be overcome before BCI technology can be applied in real-world situations for NAT. In this work I firstly address the issue of subject dependence in training data collection for classifier calibration, which can be time-consuming and impractical. I investigated the training of a subject-independent predictive model that is trained on a group of other users' data and applied to online-testing data of a new person. This was done in the context of training an automatic classifier for error detection and correction. Results showed that a classifier model can be trained without user-specific calibration and with high accuracy. The number of electrodes used in training the model was also reduced. Further it was validated that the trained classifier models were based on cortical sources and not other modalities. In a second study I address the issue of task-dependence. To that end I tested the application of a potentially task-independent calibration paradigm for mental workload assessment in a new task. This new task was a speed reading context, where subjects read texts of varying difficulty and speed. The study found that the mental workload prediction model was accurate in classifying mental workload in different reading tasks, indicating that it can be used as a task-independent classifier for mental workload. In a third study I examine if it is possible to measure neural correlates of human moral assessment using a passive BCI on a single-trial basis. A calibration paradigm was developed using pictures that were ranked as morally unacceptable and morally neutral. However, the results showed low classification accuracies and it was not possible to reliably distinguish between a user's subjective moral evaluations on a single-trial basis using current classification approaches. The results presented in this thesis provide solutions towards real-world applicability of NAT enabled by passive BCIs, as examples of a subject-independent and a task-independent classifier are demonstrated and discussed. Further, approaches for increased versatility of passive BCI technology are presented, that could make passive BCIs more feasible for use in future real-world human-machine interaction settings.}, subject = {Passive brain-computer interfaces; Mental state assessment; Neuroadaptive technology; Human-machine interaction; Electroencephalography; Passive Gehirn-Computer-Schnittstellen; Neuroadaptive Technologie; Mensch-Maschine-Interaktion; Elektroenzephalographie; Erfassung mentaler Zust{\"a}nde; Elektroencephalographie; Hirnfunktion; Mensch-Maschine-Interaktion; Gehirn-Computer-Schnittstelle}, language = {en} } @phdthesis{Schmaler2023, author = {Schmaler, Martina}, title = {Auswirkungen von Rechtsformwechseln auf das Commitment der Besch{\"a}ftigten einer Stiftung}, doi = {10.26127/BTUOpen-6594}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65946}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Die vorliegende Studie m{\"o}chte einen Beitrag zur Erforschung der Frage leisten, inwiefern Rechtsformwechsel bei Stiftungen Auswirkungen auf das Commitment der Besch{\"a}ftigten haben. Der Fokus liegt dabei auf den Wechselabsichten des Personals beziehungsweise auf dem Absentismus. Im Rahmen einer qualitativen Forschung wurden drei Stiftungen betrachtet, in denen ein Rechtsformwechsel stattgefunden hat. Die Untersuchung wurde mittels Expert/-inneninterview durch eine semistrukturierte Befragung anhand eines Interviewleitfadens durchgef{\"u}hrt. Die Auswertung der Daten erfolgte durch eine qualitative Inhaltsanalyse per QDA-Software. Dabei konnte festgestellt werden, dass bei Einhaltung der Maßnahmen zur St{\"a}rkung des Commitments wenige und dann nur positive Auswirkungen zu erkennen sind, da sich Fehlzeiten und Absentismus nicht wesentlich ver{\"a}nderten. F{\"u}r die Praxis ist relevant, dass die Vorteile der {\"A}nderung der Rechtsform einer Stiftung gegen{\"u}ber den Risiken {\"u}berwiegen. Weitere Forschungsbedarf,besteht hinsichtlich des nachlassenden Engagements beim Personal im Hinblick auf {\"A}nderungen.}, subject = {Commitment; Stiftung; Personal; Absentismus; Wechselabsicht; Stiftung; Unternehmensform; {\"A}nderung; Mitarbeiter; Commitment; Human resources; HR; Legal form change; Turnover intention; Absenteeism}, language = {de} } @phdthesis{Welling2024, author = {Welling, Malte}, title = {Choice experiments in the valuation of urban ecosystem services}, doi = {10.26127/BTUOpen-6651}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66510}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {Cities are major contributors to climate change and biodiversity loss, and at the same time particularly affected by some of their consequences. Urban green can help address these challenges and provide numerous other benefits to people. Economic valuation can estimate the value that people assign to these diverse urban ecosystem services. The environmental economics literature uses several valuation methods. This work examines the valuation of urban ecosystem services with choice experiments. It includes five articles that use empirical analysis to address three overarching research goals: First, to improve understanding of the value of urban ecosystem services to urban residents. Second, to contribute to improving the validity of choice experiments. Third, to develop modeling of spatial patterns in the value of urban ecosystem services. Chapter 1 describes the background and motivation of the valuation of urban ecosystem services with choice experiments, gives an overview over the relevant literature, and sets out the research objectives and methods of this dissertation. Chapter 2 presents a choice experiment on green spaces, street trees and green roofs in Bremen. It analyzes the effect of additional information that these measures are part of a climate adaptation strategy. The results show greater willingness to pay among informed respondents. Part of the effect can be explained by a higher credibility of the survey. Chapter 3 describes a choice experiment on urban gardens in Berlin and Stuttgart. It explores how respondents process the information provided in the questionnaire. It finds that questions about the information do not significantly affect either recall or the responses in the choice experiment. Chapter 4 is based on choice experiments on street trees, green spaces, and greenways in four German cities. It examines how choice experiment surveys should elicit perceived consequentiality. The results show advantages of elicitation before the choice experiment over the usual elicitation afterwards. Chapter 5 explores how valid policy makers perceive the results of choice experiments on urban green in several German cities, and what consequences this has for their use of the results. Interviews show that most policy makers use the results in their city to raise awareness or justify positions. Perceptions of validity are mixed, but do not play a major role in this type of use. Chapter 6 examines the spatial distribution of the value of urban ecosystem services using choice experiments on green spaces, urban trees, green roofs, and green facades in Berlin and Leipzig. It develops and tests new choice models that may better represent than the common approach how the value of urban green space decreases with distance. Based on the findings of the articles, Chapter 7 derives recommendations for practitioners of choice experiments and for urban green policy makers. Finally, it identifies research gaps that would be promising for future studies.}, subject = {Urban green; Stated preferences; Economic valuation; Validity; Discrete choice experiment; Stadtgr{\"u}n; {\"O}konomische Bewertung; Validit{\"a}t; Deutschland; Stadt; Gr{\"u}nfl{\"a}che; Dachbegr{\"u}nung; Strassenbaum; Klimaschutz; {\"O}kosystemdienstleistung; Nutzwertanalyse; Umfrage; Wahrnehmung}, language = {en} } @inproceedings{Piotrowski2023, author = {Piotrowski, Krzysztof}, title = {20. GI/ITG KuVS Fachgespr{\"a}ch Sensornetze (FGSN 2023)}, editor = {Piotrowski, Krzysztof}, doi = {10.26127/BTUOpen-6637}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66374}, year = {2023}, abstract = {There are many names we use to call them, like the (original) Wireless Sensor Networks, Wireless Sensor and Actuator Networks, Internet of Things, Cyber-Physical Systems, Cyber-Physical Systems of Systems, and some others. More or less visible, wireless sensor networks are already applied in many aspects of our lives and for different purposes. During the 20 years of Fachgespr{\"a}ch Sensornetze (FGSN) we were able to observe the process of the birth and evolution of wireless sensor networks. What do they look like now, from that time perspective? Is there still room for research andimprovements? Or are they maybe already that mature that everything has already been said? And what do they look like from the industry point of view? What is the future of sensor networks? Where are they heading? These retrospective and perspective views are the central topic of the 20th edition of the Fachgespr{\"a}ch Sensornetze (FGSN 2023) held on the 4th of September 2023 at Hasso-Plattner-Institut as part of the NetSys 2023 conference in Potsdam. We were happy to meet again, to discuss these subjects within the scientific community. The aim of this series of Fachgespr{\"a}ch is to give scientists from academia and industry the opportunity for an informal exchange of ideas and to strengthen cooperation in this multidisciplinary research area.}, subject = {Wireless sensor networks; Sensor; Netzwerk; Kongress ; Applications; Drahtlose Sensornetze; Anwendungen; Forschung; Research}, language = {en} } @phdthesis{Kentsch2024, author = {Kentsch, Simon}, title = {Professionalisierung der Managementnachwuchsentwicklung in deutschen Unternehmen : Entwicklung eines Nachwuchs-Entwicklungs-Index}, doi = {10.26127/BTUOpen-6636}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66362}, school = {BTU Cottbus - Senftenberg}, year = {2024}, abstract = {In den letzten Jahren erkannten Unternehmen zunehmend die Bedeutung der Entwicklung ihrer Talente, doch eine klare Handlungsstrategie dazu fehlt. Basierend auf dieser Problemstellung entwirft die vorliegende Forschungsarbeit in Form des Nachwuchs-Entwicklungs-Index (NEX) eine praktische Evaluation sowie einen zweckdienlichen Leitfaden zur Integration einer strategischen Nachwuchs-Entwicklungs-Struktur. Die Forschung zum NEX sah hierf{\"u}r 3 Forschungsschritte vor: Eine Literaturrecherche, die Experteninterviews sowie die quantitative Indexdefinition. Damit verbunden wurden folgende Forschungsfragen zur Eingrenzung des Vorhabens festgehalten: - Sind individuelle Faktoren, welche das individuelle Beziehungsmanagement zu einem Nachwuchsmanager ber{\"u}cksichtigen, entscheidend f{\"u}r die professionelle Nachwuchsmanagemententwicklung? - Welche Faktoren sind als Erg{\"a}nzung zum Personalmanagement-Professionalisierungs-Index (PIX) entscheidend f{\"u}r die professionelle Nachwuchsmanagemententwicklung? - Welche Handlungsempfehlungen entstehen anhand des NEX je nach Reifegrad eines Unternehmens? Die ersten beiden Forschungsphasen, der theoretischen Aufarbeitung sowie der qualitativen {\"U}berpr{\"u}fung und Eingrenzung der Themenfelder durch Experteninterviews, zeigen auf, dass die Entwicklung von F{\"u}hrungstalenten eine hohe Relevanz im Unternehmensalltag hat. Die quantitative Aufarbeitung dieser Grundlagen hatte einen Index zur Folge, welcher 95 Items umfasst und sich in strukturelle Items (PIX-Ursprung) und personelle Items (eigens entwickelt) unterteilte. Zur Validierung dieser Items wurde eine quantitative Online-Befragung umgesetzt. Schlussendlich konnten N = 159 auswertbare Datens{\"a}tze zur Quantifizierung des NEX herangezogen werden. Parallel zur Methodik des PIX wurde eine Hauptkomponentenanalyse durchgef{\"u}hrt, um die wesentlichen Komponenten des NEX zu k{\"o}nnen. Im weiteren Verlauf zeigten sich zwei {\"u}bergeordnete Komponenten sowie 16 Frageitems als entscheidend f{\"u}r den NEX. Mit der h{\"o}chsten Ladung k{\"o}nnen die folgenden Items beispielhaft als bedeutende Aspekte herangezogen werden: - Die einzelnen Prozesse des Personalmanagements sind hinreichend miteinander verzahnt. - Der Kernprozess zum Personaleinsatz ist im Unternehmen eindeutig festgehalten. - Der Kernprozess zur Personalplanung ist im Unternehmen eindeutig festgehalten. Im Zusammenhang mit der personellen Komponente sind folgende Maßnahmen beispielhaft wichtige Aspekte, um eine professionelle Nachwuchs-Entwicklungs-Strategie abzubilden: - {\"U}ber ein Alumni-Netzwerk wird Kontakt zu ausgeschiedenen Mitarbeitern gehalten. - Die subjektive Mitarbeiterzufriedenheit wird bei der Mitarbeiterbeurteilung ber{\"u}cksichtigt. - Mit jedem Mitarbeiter, der aus dem Unternehmen ausscheidet, wird ein strukturiertes K{\"u}ndigungsgespr{\"a}ch gef{\"u}hrt. Die Ergebnisse erm{\"o}glichen es Unternehmen, zuk{\"u}nftig mit einem {\"o}konomisch {\"u}berschaubaren Aufwand erste Einblicke {\"u}ber den Stand der Professionalisierung ihrer eigenen Nachwuchs-Entwicklungs-Arbeit zu erhalten.}, subject = {F{\"u}hrungskr{\"a}fteentwicklung; Personalentwicklung; Managemententwicklung; Personalmanagement-Professionalisierungs-Index; Talent management; Talent development; HR strategy; PIX; Human resources; F{\"u}hrungskraft; F{\"u}hrungskr{\"a}fteentwicklung; Personalentwicklung}, language = {de} } @phdthesis{Shlychkova2023, author = {Shlychkova, Darita}, title = {Lightweight structured steel members : properties and application}, issn = {1611-5023}, doi = {10.26127/BTUOpen-6531}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65311}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {This thesis is dedicated to the structured sheet metals topic. Structured sheet metals are semi-finished products with the honeycomb (cell) shape, made by cold forming of the flat sheets. They represent an innovative technology in the field of lightweight construction. In recent years, this technology has undergone dynamic development what gives to researchers possibilities to improve the level of knowledge about structured sheets metals properties and explore new application fields for them. The structuring improves basic properties, such as stiffness, compared to the flat sheet material. Due to these advantages, the use of structured sheet metals offers enormous innovation potential for efficient lightweight construction in many industrial sectors such as aerospace, rail transport technology, architectural products. Structured sheets have already been implementing in lighting technology, in the manufacture of household appliances and even in automotive industry. So that, the question arises if it possible to apply this kind of material successfully in other areas such as building industry. This work contains an overview of the lightweight constructions historical development and stiffening elements in the steel industry, also the creation process of structured sheet metals, manufacturing investigated specimens, further bending tests, numerical simulations, analysis and comparison of resulting data and possible further use of lightweight beams with structured sheet elements as a building construction. In this work beams compound of structured and flat plates are investigated. Steps of structured plates manufacturing process are described: hydroforming, point- and laser welding and bending. As a result, lightweight beams of two main shapes are manufactured: C- and square sectioned. There are four types of beams for each of the shapes are investigated. Every type has same geometrical dimensions, but thicknesses vary. The series of laboratory tests with created beams under load is made. Three- and four-points bending tests are chosen for that. This work also presents numerical analysis based on conducted experiments: buckling and global non-linear behavior of specimens by use of the software package ABAQUS/CAE are obtained. The behavior of the beams with structured and flat sheets under load is analyzed and the comparison of parameters such as load bearing capacity and stiffnesses is made. Finally, in addition to laboratory and simulations, parametric modelling is done. Also, based on parametric calculations, the proposal for calculation the beams stiffness for with higher thicknesses is given. It allows to predict the behavior of beams with structured sheets with different thicknesses without manufacturing and conducting the expensive and time-taking laboratory experiments. In conclusion, the recommendations for the simplifying of manufacturing process and for the improving of the beams stiffnesses are given.}, subject = {Lightweight constructions; Sandwich members; Structured sheet metals; Leichtbau; Sandwichelemente; Strukturierte Bleche; Leichte Stahltr{\"a}ger; Tr{\"a}ger; Blech; Strukturiertes Blech; Belastung; Tragverhalten; Steifigkeit}, language = {en} } @phdthesis{Edo2023, author = {Edo, Iwebuke}, title = {Environmental laws as tools for effective management of Niger-Delta wetland : a case study of Upper Orashi forest}, doi = {10.26127/BTUOpen-6624}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66244}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {With the increasing consciousness of the value of wetland ecological and environmental functions and its fast rate of decline in the size of this important and rich ecosystem globally, the Niger Delta ecosystem has been reported to be undergoing tremendous change, hence the need for this research, to identify the challenges and proffer solutions. This study focuses on ascertaining if a change has occurred in the Upper Orashi Forest Reserved wetland, to know and evaluate the policies used in managing the wetland in the region and Nigeria. To ascertain the wetland change, land cover change detection was carried out using Geographic Information Systems and Remote Sensing to produce paradigm or data to detect change occurrence in the wetland area. Supervised classification of land use and land cover change was carried out using LANDSAT data from 2002, 2008, and 2019. Thereafter, the land cover transition was mapped for the period 2002 to 2019 and this was computed for the net land cover change for the period of study. The site was classified into three different classes and each class was analyzed using the land use and land cover change model formula. The result from this part shows that there is a consistent decrease in the wetland area for the period under review and in the other two identified classes, some interchangeable compositions were observed for the period of study. To validate this result, the opinion of experts and the host community is needed. Two sets of questionnaires were designed for experts and local community dwellers to sample their opinion in relation to the wetland and its management. The information collected was analyzed using Microsoft excel and the result shows that changes have occurred in the wetland of Upper Orashi Forest (decrease in size and other challenging issues with respect to policies and regulations). This study has identified critical challenging issues facing wetlands in the region or driving factors of wetland loss in the study area. Thereafter making recommendations that will help address these issues to actualize environmental sustainability and sustainable wetland in the region and Nigeria at large.}, subject = {Feuchtgebiet; Ramsar-Konvention; Nachhaltigkeit; Landnutzungs{\"a}nderung; {\"O}kosystem; Wetland management; Ramsar Convention; Geographic information system; Land use and cover change; Ecosystem; Nigeria; Umweltrecht; {\"O}kosystem; Ramsar-Konvention (1971 Februar 02); Feuchtgebiet; Bodenbedeckung; Geoinformationssystem; Fernerkundung}, language = {en} } @phdthesis{Vollrath2023, author = {Vollrath, Bastian}, title = {Erweiterungen der Vereinfachten Fließzonentheorie hinsichtlich der Anwendung von Mehr-Parameterbelastungen und der Ber{\"u}cksichtigung von Theorie II. Ordnung}, issn = {1615-3952}, doi = {10.26127/BTUOpen-6605}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66058}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Die vorliegende Arbeit besch{\"a}ftigt sich mit der Erweiterung der Vereinfachten Fließzonentheorie, welche ein effizientes Verfahren zur Absch{\"a}tzung von Zustandsgr{\"o}ßen im Einspielzustand ist. Die wesentlichen Erweiterungen werden im Bereich der Mehr-Parameterbelastungen und in der Verwendung von Theorie II. Ordnung beschrieben. Bei der Ber{\"u}cksichtigung von paarweise auftretenden Lastf{\"a}llen (Ein-Parameterbelastungen) hat sich das Verfahren bereits bew{\"a}hrt und wird in dieser Arbeit f{\"u}r die Ber{\"u}cksichtigung von beliebig vielen Lastf{\"a}llen (Mehr-Parameterbelastungen) erweitert. Es wird in numerischen Untersuchungen nachgewiesen, dass eine paarweise Betrachtung von Lastf{\"a}llen gegen{\"u}ber der Mehr-Parameterbelastung zu Fehleinsch{\"a}tzungen der Beanspruchungen f{\"u}hren kann. Die Ber{\"u}cksichtigung aller beteiligten Einwirkungen durch Mehr-Parameterbelastungen in der Vereinfachten Fließzonentheorie liefert einen effizienten und detaillierten Einblick in elastisch-plastisch beanspruchte Tragwerke im Einspielzustand. (DFG-Projektnummer: 286671283) Schlanke Tragwerke, bei denen die Struktursteifigkeit durch Membranspannungen beeinflusst wird, erfordern eine Berechnung nach Theorie II. Ordnung. Bei unter Druck stehenden Rohrleitungen und insbesondere bei d{\"u}nnwandigen Rohrb{\"o}gen k{\"o}nnen signifikante Steifigkeitseffekte beobachtet werden. Treten zus{\"a}tzlich zyklische und {\"u}berelastische Beanspruchungen auf, interagiert die geometrische Nichtlinearit{\"a}t und die Materialnichtlinearit{\"a}t. Um dem daraus entstehenden hohen Berechnungsaufwand entgegenzutreten, wird eine Technik vorgestellt, die es erm{\"o}glicht, die Vereinfachte Fließzonentheorie unter Ber{\"u}cksichtigung von Theorie II. Ordnung zu verwenden. An numerischen Untersuchungen wird gezeigt, dass diese Weiterentwicklung der Vereinfachten Fließzonentheorie eine hohe Qualit{\"a}t der Ergebnisse bei deutlich geringerem Berechnungsaufwand liefert. (DFG-Projektnummer: 416907346)}, subject = {Ratcheting; Dehnungsakkumulation; Direkte Methode; Mehr-Parameterbelastung; Theorie II. Ordnung; Strain accumulation; Elastoplastische Deformation; Fließfigur; Ratcheting; Theorie zweiter Ordnung; Dehnung; Belastung; Direct method; Multi-parameter loading; Ratcheting; Second order theory}, language = {de} } @phdthesis{Franken2023, author = {Franken, Tim}, title = {Multi-objective optimization of stochastic engine models}, doi = {10.26127/BTUOpen-6633}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66335}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {This thesis summarizes the author's developments of combustion models and multi-objective optimization methods for gasoline and diesel engines. The combustion models belong to the family of zero-dimensional stochastic reactor models introduced in the 1990s to improve the prediction of emissions with detailed chemistry in partially stirred reactors. The first part introduces the fundamentals of the physical and chemical models describing the combustion process. As a novelty, k-ε turbulence models were implemented in the stochastic reactor model to predict the turbulent time and length scales in gasoline and diesel engines. This development allowed an improvement of the models for convective heat transfer, fuel evaporation, gas exchange across the valves, turbulent flame propagation and crevice flow, which depend on the turbulent time and length scales. In the second part, the multi-objective optimization platform for automatic training of the stochastic reactor model is presented. The optimization method considers multiple operating points to find a set of model parameters that predict performance and emissions over the entire engine map. The Non-domination Sorting Genetic Algorithm II is combined with the stochastic reactor model and response surface models to find the best Pareto front. Multi-criteria decision making is used to select the best designs from the Pareto front. Finally, the third part of this thesis deals with the validation of the stochastic reactor model and the multi-objective optimization platform. For this purpose, experiments of two single-cylinder research engines with spark ignition, one passenger car engine with compression ignition and one heavy duty engine with compression ignition are used. For the spark ignition engines, a set of model parameters was found that predicts well the power and emissions over the whole engine map. The calculated turbulent kinetic energy, dissipation, and angular momentum follow the trends of the three-dimensional computational fluid dynamic simulations to a good approximation for various operating points. For the two compression ignition engines, the prediction of combustion progress and nitrogen oxide emissions are in good agreement with the experiments. Larger discrepancies were found for the prediction of carbon monoxide and unburned hydrocarbon. Optimization of the soot model parameters improves the prediction of soot mass for operating points throughout the engine map.}, subject = {Stochastic reactor model; Multi-objective optimization; Turbulence modelling; Emissions; Internal combustion engine; Stochastisches Reaktormodell; Multi-kriterielle Optimierung; Turbulenzmodellerierung; Emissionen; Verbrennungsmotor; Verbrennungsmotor; Abgasemission; Turbulenz; Stochastisches Modell; Optimierung}, language = {en} } @phdthesis{Kaule2023, author = {Kaule, Evelyne}, title = {Robuste rauscharme GaN Verst{\"a}rker : Untersuchung und Limitierung der Ausgangsleistung im {\"U}berlastfall}, doi = {10.26127/BTUOpen-6603}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66035}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Stetig steigende Leistungen der Leistungsverst{\"a}rker in den Sender-Empf{\"a}ngermodulen zwingen den rauscharmen Verst{\"a}rker zu einem immer h{\"o}heren Schutz am Eingang. Aufgrund hoher Durchbruchspannungen bieten GaN HEMTs eine robuste Eingangsstufe, womit ein Schutz des LNA Eingangs und die damit verbundene Verschlechterung der Rauschzahl unn{\"o}tig wird. Allerdings n{\"u}tzte dieser Schutz nicht allein den rauscharmen Verst{\"a}rker, da nachfolgende Stufen durch die hohen Ausgangsleistungen der GaN LNAs zerst{\"o}rt werden k{\"o}nnen. Daher widmet sich diese Arbeit der Untersuchung von robusten rauscharmen GaN Verst{\"a}rkern sowie verschiedener Schaltungen zum Schutz der nachfolgenden Stufen vor einer zu hohen Eingangsleistung, wobei die Rauschzahl unbeeinflusst bleiben soll. Da eine robuste Eingangsstufe relevant f{\"u}r diese Arbeit ist, wurden neuartige Designs von robusten GaN LNA MMIC untersucht. Einerseits wurde ein LNA MMIC Chip mit einer gestapelten Eingangsstufe entwickelt, womit die Eingangsleistung und entsprechend die Robustheit erh{\"o}ht werden konnte. In dieser Arbeit wird ein verbessertes Design des gestapelten GaN LNA MMIC vorgestellt, dessen Verst{\"a}rkung von mehr als 23 dB und ein Rauschmaß von 2,6 dB im C-Band Frequenzbereich erreicht. Anderseits wurde ein neuartiger multiband GaN LNA MMIC f{\"u}r die Frequenzen 0,8 GHz; 1,8 GHz und 3,6 GHz entwickelt. Dieser erreicht eine Verst{\"a}rkung von mehr als 29 dB bei 0,8 GHz und mehr als 34 dB bei 3,6 GHz mit einer maximalen Verst{\"a}rkung von 34,9 dB bei 1,8 GHz sowie einen minimalen Rauschmaß von 2,2 dB bei 3,6 GHz. Der multiband LNA MMIC ist mit einen OIP3 von mehr als 36dBm bei 3,6 GHz hochlinear. Weiterhin wurde f{\"u}r den gestapelten und den multiband GaN LNA MMIC die Robustheit mittels eines hochohmigen Widerstands in der Gate Versorgung verbessert. Im Rahmen der Charakterisierung von GaN Verst{\"a}rkern zeigt sich, dass der Gate DC und Drain DC Strom Indikatoren jeweils f{\"u}r die Kompression und S{\"a}ttigung der Ausgangsleistung im {\"U}berlastfall darstellen. Der Zusammenhang zwischen dem Gate DC Strom und dem {\"U}berlastfall war der Ausgangspunkt f{\"u}r die Entwicklung der Schaltungen zur Limitierung der Ausgangsleistung, um die nachfolgenden Stufen des LNAs zu sch{\"u}tzen. Daher wird dieser Strom zum Schalten eines Ausgangsd{\"a}mpfungsglieds sowie einer adaptiven Drain DC Versorgung verwendet. Das Ausgangsd{\"a}mpfungsglied wurde als ein GaN HEMT in Common-Gate Konfiguration an den Ausgang eines robusten GaN LNAs auf einen Chip geschalten, wodurch im {\"U}berlastfall eine D{\"a}mpfung von 29 dB erreicht wird. Weiterhin konnte durch die adaptive Drain DC Versorgung, welche als eine hybride Schaltung mit einem robusten GaN LNA MMIC als Kern entwickelt wurde, eine D{\"a}mpfung von 28 dB erzielt werden. Sowohl f{\"u}r das Ausgangsd{\"a}mpfungsglied als auch f{\"u}r die adaptive Drain DC Versorgung blieben die Kleinsignal Verst{\"a}rkung und das Rauschmaß des GaN LNA MMICs unbeeinflusst.}, subject = {GaN; HEMT; Rauscharmer Verst{\"a}rker; Robustheit; {\"U}berlastfall; MMIC; Galliumnitrid; HEMT; Rauscharmer Verst{\"a}rker; Robuste Regelung; {\"U}berlastkontrolle; Low-noise amplifier; LNA; Ruggedness; Overdrive condition}, language = {de} } @phdthesis{Alsabbagh2023, author = {Alsabbagh, Wael}, title = {Investigating security issues in programmable logic controllers and related protocols}, doi = {10.26127/BTUOpen-6611}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66114}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Programmable Logic Controllers (PLCs) are pivotal in Critical Infrastructures (CIs) and Industrial Control Systems (ICSs), governing processes in nuclear power plants, petrochemical factories, and water treatment systems. Despite their importance, PLCs are vulnerable to security threats, notably control logic injection attacks, aiming to sabotage physical processes. This thesis delves into PLC security, analyzing vulnerabilities in non-cryptographically and cryptographically protected PLCs, particularly Siemens S7-300 and S7-1500 models. Siemens, an automation market leader, utilizes S7-300 PLCs in millions of applications, reflecting the broader ICS security landscape. The S7-1500 line claims resistance to cyberattacks, including control logic injections. The thesis evaluates authentication in non-cryptographically protected PLCs, introducing a stealthy control logic injection attack scenario using an S7-300 PLC and S7Comm protocol. The second part explores integrity checks in cryptographically protected S7-1500 PLCs. Findings, encompassing disclosed vulnerabilities, lead to a severe control logic injection attack with a malicious interrupt block, conducted in an industrial setting using the S7-1500 and S7CommPlus protocol. The final segment focuses on Profinet protocol security and an injection attack scenario. The study demonstrates adversaries manipulating critical data without prior knowledge, causing harm to physical processes. A real-world attack on a Profinet-based system with two S7-300 PLCs is executed. The thesis concludes by proposing mitigation solutions, enhancing PLC and communication protocol security. This contribution elevates the security posture of millions of operating devices globally, advancing PLC security research.}, subject = {Programmable logic controllers; Control logic injection; Cyberattacks; Cybersecurity; False data injection; Speicherprogrammierbare Steuerungen; Control Logic Injection-Angriffe; Cyberangriffe; Cybersischerheit; False Data Injection-Angriffe; Kritische Infrastruktur; Kontrollsystem; Speicherprogrammierte Steuerung; SIMATIC S7-300; SIMATIC S7-1500; Computersicherheit; Cyberattacke}, language = {en} } @techreport{HesseStarke2023, type = {Working Paper}, author = {Hesse, Mario and Starke, Tim}, title = {Doppelte Krise der kommunalen Finanzen in Kleinst{\"a}dten?}, issn = {2940-6366}, doi = {10.26127/BTUOpen-6614}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66144}, year = {2023}, abstract = {Die doppelte Krise der Kleinst{\"a}dte, die sich einerseits aus einer allgemeinen Investitionskrise und andererseits einer Gestaltungskrise zusammensetzt, ist mit Blick auf diesen Beitrag als durchaus ambivalent zu bewerten. Hinsichtlich der Investitionskrise ist zun{\"a}chst ein erheblicher und struktureller Investitionsr{\"u}ckstand festzustellen, der im Durchschnitt {\"u}ber alle kommunalen Gruppen (kreisangeh{\"o}rige Gemeinden, kreisfreie St{\"a}dte und Landkreise) hinweg besteht, in den Gr{\"o}ßenklassen der kreisangeh{\"o}rigen Gemeinden jedoch unterschiedlich hoch ausgepr{\"a}gt ist. So sind die Kleinst{\"a}dte im Gesamtbild {\"u}berraschend gut aufgestellt, obwohl sie nicht besonders steuerstark sind. Eine besondere Investitionskrise der Kleinst{\"a}dte konnte dementsprechend aus den empirischen Untersuchungen nicht abgeleitet werden. Zugleich sind Kleinst{\"a}dte bei der Bew{\"a}ltigung der k{\"u}nftigen Herausforderungen besonders gefordert, da deren Komplexit{\"a}t (demografischer Wandel, Klimatransformation, Digitalisierung von Wirtschaft und Gesellschaft) in diesen Gemeinden auf relativ kleine Verwaltungen mit wenigen M{\"o}glichkeiten der tiefen Spezialisierung trifft. Dar{\"u}ber hinaus kann auch keine allgemeine Gestaltungskrise in den Kleinst{\"a}dten konstatiert werden. Der Umfang der freiwilligen Aufgabenwahrnehmung, welcher einen geeigneten Gradmesser der kommunalen M{\"o}glichkeiten zur Selbstverwaltung repr{\"a}sentiert, f{\"a}llt durchschnittlich zwar niedriger aus als in den Mittel- und Großst{\"a}dten. Dies ist jedoch bezugnehmend auf deren konkreten Aufgabenumfang und r{\"a}umliche Ausstrahlwirkung wenig verwunderlich. F{\"u}r die Kleinst{\"a}dte erscheint dabei weniger eine Abgrenzung nach der Einwohnerzahl, sondern vielmehr die Einstufung in das System der Zentralen Orte bedeutsam. Dies gilt sowohl f{\"u}r die Abgrenzung gegen{\"u}ber gr{\"o}ßeren St{\"a}dten (d. h., Mittel- und Oberzentren) als auch gegen{\"u}ber kleineren Gemeinden ohne st{\"a}dtischen Charakter. Demnach scheint die Einstufung in Grund- und Mittelzentren ein zweckm{\"a}ßiger Maßstab f{\"u}r eine Differenzierung zwischen kleineren und gr{\"o}ßeren Kleinst{\"a}dten zu sein. Demzufolge ist f{\"u}r die Kleinst{\"a}dte hinsichtlich ihrer Funktion als „Anker" im l{\"a}ndlichen Raum weniger die eigene Bev{\"o}lkerungszahl als vielmehr die zentral{\"o}rtliche Einstufung relevant, die somit tats{\"a}chlich das Handeln vor Ort entscheidend pr{\"a}gt. Trotz der vergleichsweisen guten Lage der Kleinst{\"a}dte ist eine krisenhafte Entwicklung durchaus mit Blick auf die F{\"o}rdermittelpraxis zu konstatieren, wobei die F{\"o}rderb{\"u}rokratie, ung{\"u}nstige Anreizeffekte und die permanente Fremdsteuerung durch die F{\"o}rdermittelgeber (vorrangig die L{\"a}nder) die Gestaltungskraft vor Ort vielfach l{\"a}hmen. Diesbez{\"u}glich sollte die staatsinterne B{\"u}rokratie wieder verst{\"a}rkt durch lokale Gestaltungsr{\"a}ume ersetzt werden. Dies k{\"o}nnte mit einer St{\"a}rkung frei verf{\"u}gbarer Finanzmittel verbunden werden, sodass Kleinst{\"a}dte k{\"u}nftig im Einklang mit ihren individuellen Rahmenbedingungen erfolgreich in die Zukunft investieren k{\"o}nnen.}, subject = {Investitionskrise; Investitionsr{\"u}ckstand; Freiwillige Aufgaben; Investitionsf{\"o}rderung; F{\"o}rderb{\"u}rokratie; Investment crisis; Investment backlog; Voluntary tasks; Investment grants; Funding bureaucracy; Kleinstadt; Gemeindefinanzwirtschaft; Investitionsf{\"o}rderung; Infrastrukturinvestition; Gemeindeaufgaben; Verwaltungsvereinfachung}, language = {de} } @techreport{Schmitt2024, author = {Schmitt, Ingo}, title = {ANN-Partitionen und CQQL-Ausdr{\"u}cke}, doi = {10.26127/BTUOpen-6606}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-66069}, year = {2024}, abstract = {Gegeben sei f{\"u}r ein bin{\"a}res Klassifikationsproblem ein k{\"u}nstliches, neuronales Netzwerk ann bestehend aus ReLUKnoten und linearen Schichten (convolution, pooling, fully connected). Das Netzwerk ann sei mit hinreichender Genauigkeit an Hand von Trainingsdaten trainiert. Wir werden zeigen, dass ein solches Netzwerk in verschiedene Partitionen des Eingaberaums zerlegt werden kann, wobei jede Partition eine lineare Abbildung der Eingabewerte auf einen klassifizierenden Ausgabewert repr{\"a}sentiert. Im Weiteren gehen wir von einem einfachen Netzwerk ann aus, bei dem die Eingangswerte Mintermen von Attributwerten entsprechen. Einfach ist ein Netzwerk, wenn es f{\"u}r eine geringe Anzahl von Attributen trainiert wurde und die Anzahl der ReLU-Knoten ebenfalls gering ist. In der Arbeit wird gezeigt, dass jede lineare Partition durch einen CQQL-Ausdruck beschrieben werden kann. Ein CQQL-Ausdruck l{\"a}sst sich mit Hilfe von Quantenlogik-inspirierten Entscheidungsb{\"a}umen beschreiben.}, subject = {Quantum logic; Artificial neural networks; Quantenlogik; K{\"u}nstliche neuronale Netze; Neuronales Netz; Quantenlogik}, language = {de} } @techreport{Kribbel2023, type = {Working Paper}, author = {Kribbel, Hanna}, title = {Digitale B{\"u}rgerbeteiligung in Kleinst{\"a}dten : eine Analyse der Beteiligungspraxis in f{\"u}nf Kleinst{\"a}dten}, issn = {2940-6366}, doi = {10.26127/BTUOpen-6593}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65937}, year = {2023}, abstract = {B{\"u}rgerbeteiligung ist in Kleinst{\"a}dten bereits g{\"a}ngige Praxis, wobei zunehmend digitale Plattformen f{\"u}r die Umsetzung von Beteiligungsprojekten zum Einsatz kommen. Diese k{\"o}nnen mehrere Vorteile mit sich bringen: Sie erreichen Zielgruppen, die sich mit analogen Formaten schwer aktivieren lassen, erm{\"o}glichen eine zentrale Abwicklung von Projekten und eine datenbasierte Auswertung von Nutzungsdaten. Zudem sollen sie Kosten und Arbeitszeit einsparen, was besonders f{\"u}r kleinst{\"a}dtische Verwaltungen mit begrenzten Ressourcen relevant ist. Ob diese Vorteile digitaler Beteiligungsplattformen sich in der Beteiligungspraxis von Kleinst{\"a}dten bereits verwirklichen lassen, ist bisher noch nicht erforscht. Die zentralen Forschungsfragen, die mit diesem Forschungsprojekt beantworten werden, lauten daher: Wie erfolgt die Umsetzung digitaler B{\"u}rgerbeteiligungsprojekte in ausgew{\"a}hlten Kleinst{\"a}dten? Inwieweit k{\"o}nnen Kleinst{\"a}dte die viel diskutierten Chancen digitaler Beteiligung bereits in die Realit{\"a}t umsetzen? Welche sind die zentralen Hindernisse? F{\"u}r die Studie wurden f{\"u}nf Kleinst{\"a}dte in Deutschland ausgew{\"a}hlt, die bereits digitale B{\"u}rgerbeteiligung umsetzen: Amt H{\"u}ttener Berge (Schleswig-Holstein), Merzenich (Nordrhein-Westfalen), Hebertshausen (Bayern), Bad D{\"u}rkheim (Rheinland-Pfalz) und Guben (Brandenburg). Das methodische Vorgehen umfasste die Durchf{\"u}hrung von leitfadengest{\"u}tzten Interviews mit Mitarbeiter:innen aus der st{\"a}dtischen Verwaltung sowie die Auswertung von Nutzungsdaten der f{\"u}nf eingesetzten Plattformen. In der Analyse des Umsetzungsprozesses der digitalen Beteiligungsprojekte wurde deutlich, dass die erwarteten Vorteile digitaler Plattformen sich zum Teil bereits bewahrheiten. Insbesondere bei der Bereitstellung von Informationen zu st{\"a}dtischen Vorhaben und der Dokumentation von Beteiligungsprozessen erweisen sich die Plattformen als sehr wertvoll - unter anderem f{\"u}r die Nachverfolgbarkeit und somit Legitimierung st{\"a}dtischer Entscheidungen. Dar{\"u}ber hinaus erfuhr das Thema Beteiligung in allen untersuchten Kleinst{\"a}dten durch die Einf{\"u}hrung einer digitalen Beteiligungsplattform wieder gr{\"o}ßere Aufmerksamkeit, sowohl auf Seiten von Politik und Verwaltung als auch auf Seiten der B{\"u}rger:innen. Gleichzeitig haben sich bei der Analyse des Umsetzungsprozesses von Beteiligungsprojekten deutliche Herausforderungen gezeigt. Die gr{\"o}ßten liegen dabei in der Steigerung der Teilnehmendenzahl, der Ansprache spezifischer Zielgruppen sowie der sorgf{\"a}ltigen Durchf{\"u}hrung von Projekten bei gleichzeitigem Effizienzanspruch. Viele dieser Herausforderungen haben strukturelle Wurzeln: Die f{\"u}r digitale B{\"u}rgerbeteiligung Zust{\"a}ndigen sind aufgrund eines vielf{\"a}ltigen Aufgabenspektrums h{\"a}ufig {\"u}berlastet und es fehlt ihnen teilweise der spezifische Wissenshintergrund f{\"u}r digitale Beteiligung. Verst{\"a}rkend kommt hinzu, dass die untersuchten Kleinst{\"a}dte bisher noch keine Leitlinien f{\"u}r die Durchf{\"u}hrung von (digitalen) Beteiligungsprojekten etabliert haben. Solche Leitlinien k{\"o}nnten als Richtschnur dienen und die Qualit{\"a}tssicherung dieser Projekte unterst{\"u}tzen. Ableitend aus diesen Ergebnissen wurden in der Studie Handlungsfelder f{\"u}r Kommunen identifiziert und Empfehlungen formuliert.}, subject = {B{\"u}rgerbeteiligung; Digitale Beteiligung; Beteiligungsplattform; Kleinstadt; Kommunale B{\"u}rgerbeteiligung; Citizen participation; Digital participation; Participation platform; Small town; Municipal citizen participation; Deutschland; Kleinstadt; Stadtverwaltung; B{\"u}rgerbeteiligung; Digitale Daten; Projektbewertung}, language = {de} } @phdthesis{KalishettyhalliMahadevaiah2023, author = {Kalishettyhalli Mahadevaiah, Mamathamba}, title = {Process development and electrical characterization of CMOS-integrated memristive devices for emerging non-volatile memory applications}, doi = {10.26127/BTUOpen-6557}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65571}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Energy efficiency is vital for future low-power electronic applications. This ultra-low power consumption requirement enables the research beyond the conventional charge-based memories. Further, reliability, high scalability, fast switching, CMOS compatibility, high endurance, etc., are some of the characteristics envisaged by the new generation of emerging non-volatile memories (NVMs). A memristor or OxRAM is one among the many emerging NVMs, which can exhibit the aforementioned characteristics, and it has the potential to replace the power-hungry conventional NVMs. The memristive devices have the advantage of monolithic integration with the CMOS logic, which enables the widening of their application areas. Despite their various advantages, the reliability, forming voltages, and variability of the devices pose a hurdle to their wide commercial usage. Hence, it is crucial to identify these factors and mitigate them. This thesis addresses these issues through fabrication process improvements, electrical characterization techniques, and device-engineering methods. The improvements in the fabrication processes reduced the pristine state currents of the memristive devices. It impacted the reliability and resistive switching performance of the memristive devices directly. To further improve the performance, the memristive devices are integrated into the 130 nm BiCMOS baseline technology of IHP. Additionally, dedicated test structures are developed to monitor and control the fabrication process steps through in-line electrical characterization. Further, the forming current and voltage values, along with their dispersions in the 4 kbit memristive arrays, were reduced by utilizing the electrical characterization techniques. Accordingly, the forming operations were performed at high operating temperatures using incremental step pulse and verify algorithm (ISPVA). In contrast to the well-known method of increasing the current compliance (1R) or the gate voltage of the transistor (1T-1R) to increase the conduction filament size, a thin layer of Al2O3 is added. This device engineering technique reduced the variability in both LRS and HRS currents of the memristive devices. Additionally, the conduction filament properties in both states are modeled by using the quantum point contact (QPC) model. Finally, harnessing the intrinsic variability of the memristive devices for neuromorphic computing applications is demonstrated. The reliability of the devices is assessed through endurance and retention characteristics.}, subject = {Memristive devices; RRAM; ISPVA; Forming; Variability; Formierspannung; Variabilit{\"a}t; Dispersion; Leitungsdraht; Neuromorphe Anwendungen; CMOS; Nichtfl{\"u}chtiger Speicher; Memristor; Modellierung; Dispersion}, language = {en} } @phdthesis{Puetz2023, author = {P{\"u}tz, Michele}, title = {Numerical investigation and extension of quadrature-based moment methods for population balances}, doi = {10.26127/BTUOpen-6575}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65751}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Particulate systems can be described by a number density function (NDF) with respect to a vector of internal coordinates. The evolution of the NDF is governed by the typically high-dimensional population balance equation (PBE). A common approach to reduce the dimensionality of the problem is to solve only for a set of moments instead of the NDF. The derived system of moment equations, however, includes unclosed integral terms that still contain the unknown NDF. One way to close the system of moment equations is to approximate the unclosed integral terms using a Gaussian quadrature computed from the moments. The procedure of taking a set of moments to compute a Gaussian quadrature, which is, in turn, used to close the moment equations, is known as the quadrature method of moments (QMOM). It gave rise to an entire family of methods, the quadrature-based moment methods (QBMMs), which are the primary focus of this work. The presented research can be divided into three major parts. The first part involves the formulation of a common Lagrangian droplet breakup model for QBMMs and the numerical investigation with the QMOM as well as the more sophisticated extended QMOM (EQMOM). The results indicate that the approximations are reasonably accurate when at least six moment equations are solved, with the EQMOM providing no advantages for the investigated configurations. In the second part, a quadrature-based moment model for the effects of fluid turbulence on particle velocities is formulated. The resulting moment equations contain non-smooth integrands that are the source of large errors when using common QBMMs. As an alternative, the Gauss/anti-Gauss QMOM (GaG-QMOM) is proposed that uses the average of a Gaussian and an anti-Gaussian quadrature. Numerical studies show that the GaG-QMOM is able to significantly reduce the previously observed large errors. Another novelty proposed in this context is the modification of the second-order strong-stability preserving Runge-Kutta method to guarantee the preservation of moment realizability in the presence of phase-space diffusion. The third part is concerned with the numerical exploration of the core algorithm of most QBMMs in terms of performance and accuracy. The algorithm consists of, first, computing the recurrence coefficients of the orthogonal polynomials associated with a set of moments, second, solving a symmetric tridiagonal eigenvalue problem to obtain the quadrature nodes and weights, and third, evaluating the integral terms in the moment equations. The results indicate that the contribution of the first step to compute the recurrence coefficients from moments to the overall computational costs is negligible. Instead, the primary focus should be on the fast solution of the eigenvalue problem and, possibly, on the efficient implementation of the moment source term evaluation, which becomes important when second-order processes are considered.}, subject = {Numerical algorithms; Computational fluid mechanics; Orthogonal polynomials; Turbulence; Population balance equations; Numerische Algorithmen; Numerische Str{\"o}mungsmechanik; Orthogonale Polynome; Populationsbilanzgleichungen; Turbulenz; Numerische Str{\"o}mungssimulation; Str{\"o}mungsmechanik; Numerisches Verfahren; Orthogonale Polynome; Turbulente Str{\"o}mung}, language = {en} } @inproceedings{OPUS4-6523, title = {Utopia Kulturelle Bildung : Kunst, Medien und Kultur in der Transformationsregion Lausitz - Tagungsband}, editor = {Menrath, Stefanie Kiwi and Damm, Nadja and Media To Be (M2B) e.V.,}, doi = {10.26127/BTUOpen-6523}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65239}, year = {2023}, abstract = {Die Publikation versammelt die Ergebnisse der Veranstaltung „Utopia Kulturelle Bildung: Kunst, Medien und Kultur in der Transformationsregion Lausitz", die im Juni 2023 vom Fachgebiet „Medienp{\"a}dagogik: {\"A}sthetische Praxis in der Sozialen Arbeit" der BTU Cottbus-Senftenberg in Kooperation mit dem gemeinn{\"u}tzigen Verein M2B e.V. durchgef{\"u}hrt wurde. Leitende Fragestellungen der Veranstaltung waren u.a.: Wie k{\"o}nnen Kulturelle Bildung, Kunst und Kultur Beteiligungsprozesse in einer Transformationsregion unterst{\"u}tzen? Und welche Rolle spielen dabei positive Zukunftsszenarien aus utopischen Geschichten oder Bildern? Bei Vortr{\"a}gen, Podiumsgespr{\"a}chen, Filmscreenings, Workshops und einer Stadtf{\"u}hrung wurde die Rolle von utopischem Denken und Kultureller Bildung im Transformationsprozess verdeutlicht und k{\"u}nstlerisch-praktisch erprobt. Dabei ging es auch um den Beitrag der sorbisch-wendischen Initiativen im Transformationsprozess - hin zu einer klimagerechten Gestaltung des Natur-Kultur-Raums Lausitz. Mit dem Fokus auf das Thema Partizipationsm{\"o}glichkeiten durch Kultur, (digitale) Medien und die K{\"u}nste dokumentiert der Tagungsband die diversen Ans{\"a}tze, Studien und Argumente der Beteiligten. Die Rubrik „Impulse" stellt Konzepte und Perspektiven aus Kultureller Bildung, Kunst und Transformationsforschung vor. Die zwei Podiumsgespr{\"a}che der Tagung werden in der Rubrik „Diskussionen" dokumentiert. Der dritte Teil des Bandes stellt konkrete „Praxisans{\"a}tze" vor, mit denen Utopief{\"a}higkeit in der Kulturellen Bildung angeregt werden kann wie u.a. Schreib-, Theater-, Medien-/Foto- und Musikp{\"a}dagogik sowie „Blaudruck im 21.Jahrhundert", einen kritischen Stadtrundgang und „Kritisches Kartieren".}, subject = {Kulturelle Bildung; Transformation; Partizipation; Utopie; Lausitz; Cultural education; Social cultural work; Lusatia; Sorbian-Wendish initiatives; Kulturp{\"a}dagogik; Strukturwandel; Transformation; Utopie}, language = {de} } @phdthesis{Pham2023, author = {Pham, Anh Tu}, title = {Design and performance assessment for kinetic fa{\c{c}}ade based on minimal surface in the context of current and projected climate changes : case study in three climate regions}, doi = {10.26127/BTUOpen-6561}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65610}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {The current global warming caused by the enormous negative effects of climate change rings alarm bells to humanity. It requires a colossal cooperation of scientific researchers and practitioners in all professions to invent innovating solutions to reduce the impact of global warming. In fact, the use of kinetic facades in architecture helps to save up to 50\% of energy used in office space and to reduce 20\% of CO2 emissions of entire building. Thus, how effective can the use of kinetic facades be in different climate regions? This research employs Grasshopper to design kinetic facades based on Minimal surfaces. DIVA 4.1 and LadyBug software based on the EnergyPlus are used to generate output data of energy use for cooling system of kinetic facade and 06 conventional facades in Berlin, Ho Chi Minh and Las Vegas in two SRES scenarios (A1FI and B1) of the IPCC in 2020, 2050 and 2080. The output data shows that the performance of the kinetic facade is approximately 40\% higher than the facade with high-performance double glazing. Meaning, there is great potential to apply kinetic facades in various places on Earth in the current context of severe climate change.}, subject = {Klimawandel; Kinetische Fassade; Konventionelle Fassade; K{\"u}hlsystemeinsparung; Energieeffizienz; Climate change; Kinetic facade; Conventional facade; Cooling system saving; Energy effciency; Fassadengestaltung; Erw{\"a}rmung ; K{\"u}hlsystem; Energieeinsparung}, language = {en} } @phdthesis{Jostmeier2022, author = {Jostmeier, Milena}, title = {Zum wissenschaftlichen Ertrag transdisziplin{\"a}rer Forschung : Potenziale und Herausforderungen sozialwissenschaftlicher Verbundprojekte}, doi = {10.26127/BTUOpen-6528}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65289}, school = {BTU Cottbus - Senftenberg}, year = {2022}, abstract = {Mit zunehmender Bestimmtheit stellt sich den großen sozialen, {\"o}kologischen und {\"o}konomischen Fragen des 21. Jahrhunderts die Vision einer Großen Transformation der Gesellschaft gegen{\"u}ber. An der Stelle von Politik und Staatlichkeit als legitimierten, regulierenden Instanzen steht in dieser Vision eine breite Allianz gesellschaftlicher Akteure aus Wissenschaft, Politik, Wirtschaft und Gesellschaft. U.a. differenzierungstheoretisch informierte Kritiken beleuchten den außerwissenschaftlichen Referenzrahmen, der bestimmt, was als sozial robustes Wissen am Ende eines transdisziplin{\"a}ren oder transformativen Forschungsprozesses stehen sollte. Im Fokus der vorliegenden empirischen Untersuchung stehen {\"o}ffentlich gef{\"o}rderte Projekte der Arbeits- und Organisationsforschung im Verbund aus Sozialwissenschaftler*innen, Vertreter*innen anderer Disziplinen sowie Beteiligten aus Unternehmen, Verb{\"a}nden und Bildungseinrichtungen. Aus der Perspektive der Akteurszentrierten Differenzierungstheorie Uwe Schimanks wird Verbundforschung als intra- und intersystemische Verhandlungskonstellation verstanden. Den methodischen Kern des Fallstudien-Ansatzes bilden qualitative Interviews mit Verbundbeteiligten der diversen wissenschaftlichen und nicht-wissenschaftlichen Partner ausgew{\"a}hlter Verbundprojekte. Es wird danach gefragt, welchen besonderen Bedingungen sozialwissenschaftliche Forschung im Rahmen dieser Verbundformate unterliegt, wie die beteiligten Sozialwissenschaftler*innen diese hinsichtlich ihrer wissenschaftlichen Wirkungen bewerten und welche (Ko-)Evolutionsstrategien sie verfolgen, um wissenschaftlichen Nutzen zu erzielen. Die Untersuchung zeigt, dass sich aus der gemeinsamen Entwicklung von Gestaltungsans{\"a}tzen mit den Anwendungspartnern ein weitreichender Einblick in Arbeit und Organisation ergibt und auf dieser Basis ein spezifisches, qualitativ dichtes Wissen entsteht. Gestaltungsanforderungen binden jedoch Arbeitskapazit{\"a}ten, die f{\"u}r die wissenschaftliche Elaboration oft fehlen. Die Forschenden hinterfragen die Transferanforderung dabei nicht grunds{\"a}tzlich, sondern kritisieren Umfang, f{\"o}rderpolitisch vorgegebene Formate und deren Transfereffekte. Die vorliegende Arbeit bietet qualitative empirische Schlaglichter auf einen bisweilen stark programmatisch diskutierten Gegenstand und ordnet diese gesellschaftstheoretisch ein. Der entstandene Br{\"u}ckenschlag zwischen soziologischer Gesellschaftstheorie und empirischer Wissenschaftsforschung bietet Anschl{\"u}sse f{\"u}r weitere Untersuchungen: Agile und responsive Formate von Forschung, Entwicklung und Transfer und komplexer werdende Akteurskonstellationen erh{\"o}hen den M{\"o}glichkeitsraum aller Beteiligten. Umso wichtiger wird es, die diversen Handlungsrationalit{\"a}ten der Verbundpartner und sich ergebende Intentionsinterferenzen systematisch in den Blick zu nehmen, um die ko-evolutiven Effekte transdisziplin{\"a}rer und transformationsorientierter Forschung zu erh{\"o}hen.}, subject = {Transdisziplin{\"a}re Forschung; Verbundprojekte; Sozialwissenschaftliche Forschung; Akteurzentrierte Differenzierungstheorie; Arbeitsforschung; Transdisciplinary research; Collaborative projects; Social science research; Actor-centered differentiation theory; Work research; Arbeitswissenschaft; Empirische Sozialforschung; Interdisziplin{\"a}re Forschung; Soziale Differenzierung; Theorie}, language = {de} } @phdthesis{Fotang2023, author = {Fotang, Chefor}, title = {Conservation status and ecology of the Nigeria-Cameroon chimpanzee in Kom-Wum Forest Reserve, North-West Region, Cameroon}, doi = {10.26127/BTUOpen-6579}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65797}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Increased human activity, such as deforestation, is a major driver of biodiversity loss worldwide. In Cameroon, these activities could ultimately threaten the survival of the Nigeria-Cameroon chimpanzee, but knowledge of their abundance and ecology in the Kom - Wum Forest Reserve in Cameroon is still lacking. This research aimed to estimate the population size of this chimpanzee subspecies and assess threats, investigate nesting behaviour, identify suitable habitats, determine feeding habits and document the tools used for food acquisition. Research was conducted using line transects during two seasons: wet (May-September 2018) and dry (November 2019-March 2020). Population size and threats were assessed by georeferencing signs of chimpanzees and human activity along line transects. Nesting behaviour was investigated by recording the characteristics of nesting trees along line transects and mapping their distribution in ArcGIS. Suitable habitat was identified by relating chimpanzee presence signs to local environmental variables related to relief, vegetation and human impact using the Maximum Entropy Species Distribution Model (MaxEnt). Feeding habits were investigated by direct examination of chimpanzee faeces, and tool use was documented by observation and measurement of tools in situ. The reserve is home to up to 83 chimpanzees. Signs of chimpanzee activity were significantly higher in mature forest than in secondary forest, and above 1000 m than below 1000 m. Hunting was the main threat to chimpanzees, and the occurrence of chimpanzee signs decreased significantly with increasing human activity. Chimpanzees preferred tall, mature forest trees at higher elevations with slopes for nesting, and avoided areas near villages and bare land. Only 8\% of the study area was suitable chimpanzee habitat. Fruit dominated the chimpanzees' diet, but they also consumed leaves and fruit pith, especially during the dry season. There was also indirect evidence that chimpanzees used tools to consume driver ants (genus Dorylus). Seasonality significantly affected the size of tools used by chimpanzees for driver ant predation. They preferred to use thicker and shorter tools for driver ant predation during the rainy season, whereas longer and thinner tools were used during the dry season. The results of this research highlight the need to reduce poaching and deforestation to protect the remaining chimpanzee population and suitable habitat in the reserve and surrounding unprotected forest. High-elevation and mature forests are critical for chimpanzee conservation and should be a high priority for protection. This research has filled the knowledge gap on what little was known about the abundance and ecology of Nigeria-Cameroon chimpanzees.}, subject = {Chimpanzee abundance; Feeding ecology; Human disturbance; Habitat preferences; Nigeria-Cameroon chimpanzee; Schimpansenvorkommen; F{\"u}tterungs{\"o}kologie; Menschenverursachte St{\"o}rungen; Lebensraumpr{\"a}ferenzen; Nigeria-Kamerun-Schimpanse; Pan troglodytes elliotii; Reservat; Lebensraum; Ern{\"a}hrungsgewohnheit; St{\"o}rung; Verhaltensforschung}, language = {en} } @phdthesis{Bodach2023, author = {Bodach, Ronny}, title = {Die kriminalistische Fallbearbeitung als ganzheitlicher Ansatz zur Beschreibung und Bew{\"a}ltigung von Cybercrime-Delikten im beh{\"o}rdlichen und unternehmerischen Umfeld durch Anwendung kriminalistischer Methoden der Fallanalyse, Versionsbildung und Untersuchungsplanung}, doi = {10.26127/BTUOpen-6569}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65694}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Die Statistik zu Cybercrime-Straftaten zeigt auch nach der Covid-19-Pandemie keine Abnahme. Die fortw{\"a}hrende Pr{\"a}senz von IT-bezogenen Delikten im Bundeslagebild Cybercrime des Bundeskriminalamtes unterstreicht die anhaltende Bedeutung der Verfolgung von Cyber-Straftaten f{\"u}r die allgemeine Kriminalit{\"a}tsbek{\"a}mpfung. Die Verfolgung von Cybercrime ist entscheidend f{\"u}r die Sicherheit von B{\"u}rgern, Unternehmen und Institutionen in Deutschland. Die steigende Anzahl von Cybercrime-Delikten steht im Kontrast zu einer stagnierenden Aufkl{\"a}rungsquote. Dies erfordert neue Herangehensweisen bei der Bearbeitung dieser Delikte. Daher wurde in dieser Arbeit eine grundlegende Methode entwickelt, die den spezifischen Anforderungen von Cybercrime-Delikten gerecht wird. Um eine geeignete Methode f{\"u}r die Bearbeitung von Cybercrime-Delikten zu entwickeln, wurden nicht-beh{\"o}rdliche Methoden zur Bew{\"a}ltigung von Sicherheitsvorf{\"a}llen analysiert. Dazu geh{\"o}ren computerforensische Ablaufmodelle, Bedrohungsmodelle und Frameworks f{\"u}r IT-Ermittlungen. Gleichzeitig wurden kriminalistische Prozesse betrachtet, die in der Bew{\"a}ltigung kriminalpolizeilicher Lagen Anwendung finden. Dies umfasst Methoden der kriminalistischen Fallanalyse, Versions- und Hypothesenerstellung sowie Untersuchungsplanung, unterst{\"u}tzt durch Kriterienkataloge. Das Ziel dieser Arbeit stellt die Entwicklung einer geeigneten Methode f{\"u}r die kriminalpolizeiliche Untersuchung von Cybercrime-Delikten durch die Verschmelzung von Methoden der Sicherheitsvorfallbehandlung und der kriminalpolizeilichen Lagebew{\"a}ltigung dar. Das entstandene KFA-Prozessmodell erm{\"o}glicht die Bewertung und Analyse von Sachverhaltsinformationen anhand eines eigenen Kriterienkatalogs, bildet die Grundlage f{\"u}r Synthese und Untersuchungsplanung und wurde an realen Fallakten evaluiert. Zus{\"a}tzlich wurde eine eigene Beschreibungssprache in Form der KFA-Taxonomie entwickelt, die die Einordnung, Beschreibung und Vergleichbarkeit von Cybercrime-Delikten erm{\"o}glicht. Abschließend befasst sich diese Arbeit mit der Umsetzung der theoretischen Grundlagen in Form von Lehrinhalten f{\"u}r die breite Nutzung in Ausbildungen im Bereich Cybercrime. Dazu wurden verschiedene Szenarien entwickelt, die die Anwendung des KFA-Prozessmodells, seines Kriterienkatalogs sowie die Umsetzung der KFA-Taxonomie anhand verschiedener Cybercrime-Delikte in praktischen {\"U}bungen demonstrieren. Das KFA-Prozessmodell richtet sich an Ermittler der Cybercrime-Kommissariate und -Dezernate der Kriminalpolizei. Es bietet eine strukturierte Methode f{\"u}r die kriminalpolizeiliche Arbeit, erl{\"a}utert den kriminalistischen Hintergrund von Delikten und ist auch ohne Vorkenntnisse im Bereich der Kriminalistik anwendbar. Diese Arbeit erm{\"o}glicht zudem Unternehmensermittlern die Integration kriminalistischer Methoden in die Sicherheitsvorfallbehandlung und verbessert die Untersuchung von Cybercrime in Unternehmensbereichen.}, subject = {Cybercrime; Kriminalistik; Fallanalyse; Sicherheitsvorfallbehandlung; Fallarbeit; Case analysis; Criminology; Deutschland; Computerkriminalit{\"a}t; Kriminalistik; Kriminalfall; Ermittlung}, language = {de} } @misc{OPUS4-6491, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,24 (15.12.2023)}, doi = {10.26127/BTUOpen-6491}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64913}, year = {2023}, abstract = {Beschluss zur Umbenennung der Fakult{\"a}tsbezeichnung Fakult{\"a}t 4 in „Fakult{\"a}t f{\"u}r Humanwissenschaften" zum 01. Januar 2024}, language = {de} } @techreport{EichenauerGailing2023, type = {Working Paper}, author = {Eichenauer, Eva and Gailing, Ludger}, title = {Mehr Akzeptanz durch verpflichtende finanzielle Beteiligung an Windenergieanlagen : die Handlungsebene der Bundesl{\"a}nder}, issn = {2941-7406}, doi = {10.26127/BTUOpen-6486}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64865}, year = {2023}, abstract = {Die bundespolitischen Rahmenbedingungen haben sich mit Blick auf den Ausbau der erneuerbaren Energien konkretisiert. Bis 2027 sind die Bundesl{\"a}nder verpflich-tet, 1,4\% der Bundesfl{\"a}che f{\"u}r Windenergie auszuweisen, bis 2032 sollen es 2\% sein. Akzeptanz ist ein zentraler Faktor f{\"u}r eine breite gesellschaftliche Zustimmung zur Energiewende. Finanzielle Beteiligung ist eine M{\"o}glichkeit, um die lokale Ak-zeptanz in Standort- und Anrainerkommunen zu st{\"a}rken. Mecklenburg-Vorpommern und Brandenburg haben Landesregelung zur ver-pflichtenden finanziellen Beteiligung and Windenergieanlagen geschaffen. Die ersten Erfahrungen mit den Landesgesetzen, die durch Expert*inneninterviews er-hoben wurden, deuten darauf hin, dass die Verpflichtung zur finanziellen Beteili-gung in beiden Bundesl{\"a}ndern merkbar zu einer Steigerung der Akzeptanz von Windenergieanlagen beigetragen hat. Das B{\"u}rger- und Gemeindenbeteiligungsge-setz aus Mecklenburg-Vorpommern (B{\"u}GemBeteilG M-V) ist vom Bundesverfas-sungsgericht als zul{\"a}ssig erachtet worden. Damit existiert eine „Blaupause" f{\"u}r eine rechtssichere Landesregelung. Entscheiden sich die Gemeinden f{\"u}r eine Investiti-onsbeteiligung, dann sind f{\"u}r sie vergleichsweise hohe Renditen bei niedrigem In-vestitionsrisiko zu erwarten. Allerdings k{\"o}nnen Investitionsoptionen Disparit{\"a}ten insbesondere in sozial-{\"o}konomisch weniger prosperierenden Regionen verst{\"a}rken. Das Brandenburger Windenergieanlagenabgabegesetz (BbgWindAbgG) liefert planbare Einnahmen f{\"u}r die Kommunen, ist einfach umzusetzen und bietet allen Gemeinden die gleichen Wertsch{\"o}pfungsm{\"o}glichkeiten, die allerdings eher gerin-ger ausfallen, als bei der Beteiligung nach B{\"u}GemBeteilG M-V. Finanzielle Beteili-gung ist ein wichtiger Baustein zur Erh{\"o}hung der Akzeptanz, er ist allerdings nur ein Element von mehreren f{\"u}r eine gesellschaftlich getragene und lokal akzeptierte Energiewende. Neben einem klaren und einm{\"u}tigen landespolitischen Bekenntnis, transparenter Kommunikation und umfassender Planungsbeteiligung, ist die Wert-sch{\"o}pfung f{\"u}r Standort- und Anrainergemeinden von erneuerbarer Energieerzeu-gung wichtig. Gemeinden m{\"u}ssen bef{\"a}higt werden, informierte Entscheidungen im Sinne des gemeindlichen Gemeinwohls treffen zu k{\"o}nnen, insbesondere mit Blick auf komplexe Sachverhalte wie sie der Energiewende eigen sind. Hierf{\"u}r sind bera-tende und vernetzende Akteure, wie eine gut ausgestattete Landesenergieagentur ebenso zentral wie die Unterst{\"u}tzung auf landespolitischer Ebene.}, subject = {Energiewende; Finanzielle Beteiligung; Windenergie; Akzeptanz; Gesetzgebeung; Energy transitions; Wind energy; Acceptance; Financial participation; Legislation; Energiewende; Windenergie; Finanzierung; Gesetzgebung; Akzeptanz}, language = {de} } @article{HasanuzzamanEivaziMerboldetal.2022, author = {Hasanuzzaman, Gazi and Eivazi, Hamidreza and Merbold, Sebastian and Egbers, Christoph and Vinuesa, Ricardo}, title = {Enhancement of PIV measurements via physics-informed neural networks}, doi = {10.1088/1361-6501/aca9eb}, year = {2022}, abstract = {Physics-informed neural networks (PINN) are machine-learning methods that have been proved to be very successful and effective for solving governing equations of fluid flow. In this work we develop a robust and efficient model within this framework and apply it to a series of two-dimensional three-component (2D3C) stereo particle-image velocimetry datasets, to reconstruct the mean velocity field and correct measurements errors in the data. Within this framework, the PINNsbased model solves the Reynolds-averaged-Navier-Stokes (RANS) equations for zeropressure-gradient turbulent boundary layer (ZPGTBL) without a prior assumption and only taking the data at the PIV domain boundaries. The TBL data has different flow conditions upstream of the measurement location due to the effect of an applied flow control via uniform blowing. The developed PINN model is very robust, adaptable and independent of the upstream flow conditions due to different rates of wall-normal blowing while predicting the mean velocity quantities simultaneously. Hence, this approach enables improving the mean-flow quantities by reducing errors in the PIV data. For comparison, a similar analysis has been applied to numerical data obtained from a spatially-developing ZPGTBL and an adverse-pressure-gradient (APG) TBL over a NACA4412 airfoil geometry. The PINNs-predicted results have less than 1\% error in the streamwise velocity and are in excellent agreement with the reference data. This shows that PINNs has potential applicability to shear-driven turbulent flows with different flow histories, which includes experiments and numerical simulations for predicting high-fidelity data.}, subject = {Machine learning; Particle image velocimetry; Turbulent boundary layer; Large Eddy Simulation; Measurement; Maschinelles Lernen; Turbulente Grenzschicht; Physikalisch informiertes neuronales Netz; Messung; Turbulente Grenzschicht; Neuronales Netz; Maschinelles Lernen; Particle-Image-Velocimetry}, language = {en} } @masterthesis{Richter2023, type = {Bachelor Thesis}, author = {Richter, Fabienne Lucia}, title = {Vergleich von Screening- und Assessmentinstrumenten zur Identifikation einer Mangelern{\"a}hrung bei Patient/innen mit Leberzirrhose}, doi = {10.26127/BTUOpen-6546}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65462}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Eine Mangelern{\"a}hrung ist eine weit verbreitete, aber oft zu wenig ber{\"u}cksichtigte Komplikation bei Leberzirrhose-Patient/innen. Um dieses Ph{\"a}nomen identifizieren zu k{\"o}nnen, werden in der pflegerischen Praxis allgemeine Screening- und Assessmentinstrumente eingesetzt. Doch h{\"a}ufig findet keine differenzierte Nutzung dieser Skalen unter Ber{\"u}cksichtigung des Krankheitsbildes statt. Ziel dieser systematischen Literatur{\"u}bersicht war es, das am besten geeignete Mangelern{\"a}hrungsscreening- oder Assessmentinstrument in Bezug auf Patient/innen mit Leberzirrhose im Vergleich zu typischen Skalen der Ern{\"a}hrungsrisiko-Erkennung zu bestimmen. Im Juni 2023 wurde eine Literaturrecherche in den Datenbanken PubMed und Cochrane Library sowie eine freie Handsuche in Google Scholar durchgef{\"u}hrt. Insgesamt konnten nach Filtereinstellungen 60 Treffer identifiziert werden. Im Anschluss des Titelscreenings, Lesen der Abstracts sowie Volltexte wurden zehn relevante Studien im Zeitraum von 2020 bis 2023 eingeschlossen. Es konnten sieben relevante Screening- sowie vier Assessmentinstrumente identifiziert werden. Nach {\"U}berpr{\"u}fung der psychometrischen Daten und der Empfehlungsh{\"a}ufigkeit bietet das speziell f{\"u}r Lebererkrankte entwickelte Assessmentinstrument RFH-NPT die zuverl{\"a}ssigsten Werte, um bei Patient/innen mit Leberzirrhose eine Mangelern{\"a}hrung identifizieren zu k{\"o}nnen. Das kann daran liegen, dass diese Skala unter anderem das Item „Ber{\"u}cksichtigung von Fl{\"u}ssigkeitsansammlungen im K{\"o}rper" beinhaltet. Die inkludierten Studien weisen im Allgemeinen eine gute Qualit{\"a}t auf. Gr{\"o}ßtenteils konnten sich {\"a}hnelnde psychometrische Daten festgestellt werden. Es ist zu {\"u}berpr{\"u}fen, ob weitere Instrumente, wie zum Beispiel MNA-SF, zur Ern{\"a}hrungsrisiko- Bestimmung beim Krankheitsbild Leberzirrhose angewandt werden sollten. Die Implementierung eines speziell f{\"u}r Leberzirrhose-Patient/innen angepassten Screening- oder Assessmentinstruments ist unabdingbar, um in der pflegerischen Praxis eine Mangelern{\"a}hrung zu identifizieren. Dadurch wird gew{\"a}hrleistet, dass mehr Menschen mit einem Ern{\"a}hrungsrisiko erkannt und schneller dem entgegenwirkende Maßnahmen eingeleitet werden. Letztlich kann dadurch das Outcome der Leberzirrhose-Patient/innen verbessert werden.}, subject = {Leberzirrhose; Screening-Instrument; Assessment-Instrument; Mangelern{\"a}hrung; Liver cirrhosis; Screening tools; Assessment tools; Instruments; Malnutrition; Leberzirrhose; Mangelern{\"a}hrung; Resident Assessment Instrument; Screening; Malnutrition}, language = {de} } @phdthesis{Bonhage2023, author = {Bonhage, Alexander}, title = {Effects of historical charcoal burning on soil landscapes in West Connecticut, USA}, isbn = {2196-4122}, doi = {10.26127/BTUOpen-6565}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65652}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {The central theme of this thesis revolves around the impacts of historic charcoal burning on todays soils and soil landscapes in Connecticut, USA. The first chapter gives an overview of the state-of-research regarding the spatial distribution, morphology and chemical- as well as physical soil composition of so called relict charcoal hearth (RCH) landforms. RCHs can be described as unique soil microhabitats in the context of flora and fauna growth. The central research aim of the thesis is led by the question: How and to what extend does the historical charcoal industry control the distribution, development and properties of present day soils in Connecticut, USA? This thesis presents results from two field-campaigns in 2017 and 2018 where 52 RCH sites were surveyed and sampled in Litchfield County, Connecticut. The resulting dataset comprises of more than 1245 soil samples from 154 soil profiles and detailed stratigraphic and morphometrical information for all RCH sites. RCH landforms result in three distinct soils: charcoal rich horizons (Auh horizons), mineral soil horizons dividing multiple Auh horizons horizontally (Cu horizons) and buried former topsoil's (Ahb horizons) or buried mineral soil horizons (Bwb horizons). Sites on flat terrain (< 4° slope) have mostly one Auh horizon, while sites on steeper terrain (> 4° slope) have mostly two, sometimes up to three Auh horizons. The total volume of sites on slopes is positively correlated to the local slope, i.e. it increases with larger steepness of the terrain. Compared to reference soils, RCH soils are enriched in total soil organic carbon and especially in pyrogenic carbon. Vertical gradients of organic carbon concentrations in Auh and Cu horizons suggest an enrichment of non-pyrogenic organic matter in the topsoil and a vertical translocation of highly aromatic carbon compounds into intermediate and buried soil horizons. Furthermore, Auh horizons have a lower bulk density, a higher crystallinity ratio (Fed/Fet) of pedogenic iron oxides and are enriched in exchangeable elements (Ca2+, Mg2+, Mn2+) as well as oxalate extractable manganese-oxides compared to reference soils. A deep-learning based automated mapping workflow called ARCHMAGE (Automated Relict Charcoal Hearth Mapping and Geospatial Exploration) was created to gain a continuous, state wide database of RCH sites locations and other relevant geospatial information. This database, in combination with calculation of site specifics RCH volumes and soil carbon stocks, showed that in regions with high RCH site densities, significant additions to local soil organic and especially pyrogenic carbon stocks are present. This effect is scale dependent, with a larger effect size on county scale and below (≤ 1:650,000).}, subject = {Soil science; Geoarchaeology; Geomorphology; Bodenkunde; Geoarch{\"a}ologie; Geomorphologie; Connecticut; Bodenkunde; K{\"o}hlerei; Meiler; Geoarch{\"a}ologie}, language = {en} } @misc{OPUS4-6490, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,23 (13.12.2023)}, doi = {10.26127/BTUOpen-6490}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64901}, year = {2023}, abstract = {Beitragsordnung der Studierendenschaft der Brandenburgischen Technischen Universit{\"a}t Cottbus-Senftenberg vom 05. Dezember 2023 f{\"u}r das Sommersemester 2024 und Wintersemester 2024/2025}, language = {de} } @masterthesis{Lehmann2023, type = {Bachelor Thesis}, author = {Lehmann, Lisa}, title = {Evidenzbasierte Maßnahmen zur Pr{\"a}vention von psychischen Belastungen bei professionell Pflegenden im Krankenhaus: Eine systematische Literatur{\"u}bersicht}, doi = {10.26127/BTUOpen-6547}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65474}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Die {\"o}konomisch ausgerichteten Organisationsstrukturen und herausfordernden Arbeitsbedingungen im Krankenhaus pr{\"a}gen bereits seit mehreren Jahren den gesellschaftlichen und wissenschaftlichen Diskurs. Rund 61\% des Pflegepersonals in der klinischen Versorgung leiden unter den sich immer weiter verst{\"a}rkenden berufsbedingten psychischen Belastungen. Das hat enorme Auswirkungen auf die mentale Gesundheit der Pflegenden und f{\"u}hrt zu {\"u}berdurchschnittlich hohen krankheitsbedingten Arbeitsausf{\"a}llen oder Fluktuationen. Aus diesem Grund stellen Maßnahmen zur Pr{\"a}vention von psychischen Belastungen eine wesentliche Komponente zur Steigerung der Arbeitszufriedenheit und Reduktion des Pflegenotstands dar. Die vorliegende Literatur{\"u}bersicht soll einen {\"U}berblick {\"u}ber bestehende Pr{\"a}ventionsmaßnahmen zur Reduktion und Bew{\"a}ltigung von psychischen Belastungen und deren belastungsassoziierten Auswirkungen bei professionell Pflegenden im Krankenhaus geben. Im Juni 2023 wurde eine systematische Literaturrecherche in den Datenbanken PubMed und PubPsych durchgef{\"u}hrt. Dabei wurden ausschließlich randomisierte kontrollierte Studien, welche im Zeitraum von 2020 bis 2023 ver{\"o}ffentlicht wurden und sich lediglich auf Interventionen f{\"u}r Pflegefachkr{\"a}fte im klinischen Setting beziehen, eingeschlossen. Insgesamt konnten zehn relevante Forschungsarbeiten identifiziert und mithilfe der CASP-Checkliste bewertet werden. Basierend auf den Ergebnissen der inkludierten Studien ergaben sich sieben Kategorien pr{\"a}ventiver Maßnahmen zur Minderung und Bew{\"a}ltigung von psychischen Belastungen bei Pflegefachkr{\"a}ften im Krankenhaus. Dabei handelt es sich um Maßnahmen der Verhaltenspr{\"a}vention, wie unter anderem Strategien zur F{\"o}rderung von proaktiven Verhaltensweisen, des Zeit- und Stressmanagements oder der Resilienz. Alle Studien zielten auf die Verbesserung der mentalen Gesundheit und Reduktion des Belastungserlebens beim Pflegepersonal ab, wobei allerdings nur einige wenige Studien statistisch signifikante Effekte nachweisen konnten. Auff{\"a}llig ist hierbei zudem, dass sich keine der Forschungsarbeiten mit M{\"o}glichkeiten zur Verh{\"a}ltnispr{\"a}vention befasste. Die Entwicklung und Implementierung pr{\"a}ventiver Maßnahmen zur Belastungsreduktion in der klinischen Pflege ist optimierungsbed{\"u}rftig. Eine Kombination verhaltens- und verh{\"a}ltnisbezogener Maßnahmen sowie eine Ver{\"a}nderung der organisatorischen und institutionellen Rahmenbedingungen ist zwingend erforderlich. Eine Verbesserung der Arbeitsbedingungen ist unabdingbar, um die Effektivit{\"a}t verhaltensbezogener Maßnahmen zu gew{\"a}hrleisten und der Belastungssituation im Pflegeberuf pr{\"a}ventiv begegnen zu k{\"o}nnen sowie das mentale Wohlbefinden der Besch{\"a}ftigten nachhaltig zu f{\"o}rdern.}, subject = {Nurses; Pflegefachkr{\"a}fte; Psychological burden; Psychische Belastungen; Prevention; Pr{\"a}vention; Hospital; Krankenhaus; Work strain; Arbeitsbelastung; Arbeitsbedingungen; Krankenhaus; Pflegepersonal; Pr{\"a}vention; Psychische Belastung}, language = {de} } @techreport{MuchaSchmidt2023, type = {Working Paper}, author = {Mucha, Claudia and Schmidt, Annika}, title = {Historische Kleinst{\"a}dte im Klimawandel : Herausforderungen, Potenziale und Handlungsans{\"a}tze}, issn = {2940-6366}, doi = {10.26127/BTUOpen-6548}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65481}, year = {2023}, abstract = {Mit der Zunahme von H{\"a}ufigkeit und Intensit{\"a}t von Extremwetterereignissen werden die Folgen des Klimawandels auf lokaler Ebene sicht- und sp{\"u}rbar. Kommunen sind aufgefordert, Vorsorge zu betreiben und mit Anpassungsmaßnahmen den Folgen des Klimawandels zu begegnen. Von besonderer Bedeutung sind Anpassungsmaßnahmen dort, wo Schadenspotenzial und -risiko besonders hoch sind, so auch in historischen Altst{\"a}dten. Gleichzeitig erfordert dieser Stadttypus besondere Sensibilit{\"a}t im Umgang mit der wertvollen Bausubstanz und einem oft einzigartigen Stadtbild. Einen konkreten L{\"o}sungsansatz im Umgang mit l{\"a}nger anhaltenden Trockenperioden auf der einen und Starkregenereignissen auf der anderen Seite bietet das Prinzip der Schwammstadt. Ziel des Forschungsvorhabens ist es, zu untersuchen, welche Elemente des Schwammstadtprinzips in welcher Weise in der historischen Stadt sinnvoll, Stadttypus-gerecht und wirkungsvoll sind. Im Kontext von baukulturell wertvoller st{\"a}dtebaulicher Struktur und Bausubtanz lautet das Motto hinsichtlich baulicher Eingriffe: „So wenig wie m{\"o}glich, so viel wie n{\"o}tig." Gleichzeitig gilt, dass die Kleinstadt im Vergleich zur Großstadt zwar einen „geringeren Grad an Ausdifferenziertheit ihrer Subsysteme" aufweist, sie aber - ebenfalls im Vergleich zur Großstadt - nicht als defizit{\"a}r betrachtet werden sollten. Neben Fragen nach Herausforderungen und Potenzialen der historischen Kleinstadt in Bezug auf die Anpassung an Klimawandelfolgen wird vor allem auf L{\"o}sungsans{\"a}tze fokussiert, die dabei helfen, Schwammstadtprinzipien und denkmalgerechte Entwicklung miteinander zu kombinieren. Untersuchungsgegenstand sind die Kleinst{\"a}dte der beiden kommunalen Arbeitsgemeinschaften St{\"a}dte mit historischen Stadtkernen des Landes Brandenburg und Historische Stadt- und Ortskerne im Land Nordrhein-Westfalen. In der ersten Phase des Projektes wurden Daten mittels einer Online-Umfrage erhoben, die daraus gewonnenen Erkenntnisse durch die Untersuchung von Referenzst{\"a}dten und Expert:innen-Interviews erg{\"a}nzt, teilweise korrigiert bzw. klargestellt. Anschließend wurden die Ergebnisse dokumentiert und wiederum {\"u}ber Veranstaltungen in die Kleinst{\"a}dte transferiert. Neben den klassischen wissenschaftlichen Methoden war ein Dialog mit und zwischen den Kleinst{\"a}dten und der Austausch mit den Expert:innen zentrales Element des Forschungsvorhabens. Zu den zentralen Erkenntnissen z{\"a}hlt, dass f{\"u}r die meisten Kleinst{\"a}dte die Anpassung ihrer historischen Altstadt an die Folgen des Klimawandels noch ein sehr neues Feld der Stadtentwicklungspraxis ist und sie dabei an personelle und finanzielle Grenzen stoßen. Zudem weist die historische Stadt- und Geb{\"a}udestruktur verschiedene hemmende Faktoren f{\"u}r die Umsetzung der Klimaanpassungsmaßnahmen auf, die eine behutsame Pr{\"u}fung der realisierbaren Maßnahmen und eine individuelle Umsetzungsstrategie notwendig machen. Gleichzeitig bietet die historische Kleinstadt eine Vielzahl an Potenzialen, die den klimaadaptiven Umbau beg{\"u}nstigen und zum Teil relativieren.}, subject = {Historische Stadt; Denkmalschutz; Kleinstadt; Klimaanpassung; Schwammstadt; Historic city; Heritage protection; Small town; Climate adaptation; Sponge city; Kleinstadt; Altstadt; Stadtsanierung; Denkmalpflege; Klimawandel}, language = {de} } @article{AlimovSviridovJenschetal.2023, author = {Alimov, Artem and Sviridov, Alexander and Jensch, Felix and Sydow, Benjamin and H{\"a}rtel, Sebastian}, title = {Additive manufacturing of hot-forming dies using laser powder bed fusion and wire arc direct energy deposition technologies}, doi = {10.3390/met13111842}, year = {2023}, abstract = {Additive technologies are now widely used for the production of complex precise parts and have high potential for the production of forming dies. In this work, hot-forming dies optimized for additive manufacturing were developed and produced with wire arc direct energy deposition (WA-DED) and laser powder bed fusion (L-PBF) technologies. The concept of lightweight hot-forming dies with a 2D-lattice structure was developed, which reduced the weight of each die by 56\%, from 14.2 kg to 6.1 kg, in production using L-PBF. Maraging/precipitation-hardened steel 17-4PH was used as an alternative to traditional hot-working steels with slightly lower mechanical properties and a much higher processability in the additive manufacturing process. The workability of the manufactured dies was confirmed by forging tests on an industrial screw press.}, subject = {Additive manufacturing; Hot-forming dies; L-PBF; WA-DED; WAAM; Additive Fertigung; Warmumformwerkzeuge; L-PBF; WA-DED; WAAM; Warmumformen; Rapid Prototyping (Fertigung); Selektives Laserschmelzen}, language = {en} } @article{GeyerWindischFritscheetal.2023, author = {Geyer, Thomas and Windisch, Thomas and Fritsche, Christoph and Sarradj, Ennes}, title = {Dataset on permeability of wings from owls and non-silently flying birds}, doi = {10.1016/j.dib.2023.109825}, year = {2023}, abstract = {The very soft and flow-permeable plumage is among the special adaptations of the owl that the silent flight is attributed to. Using a specially designed apparatus that provides a low-speed volume flow of air through a small sample of porous materials, measurements of the air flow permeability were performed in accordance to ISO 9053 on a total of 39 prepared wing specimen from six different bird species, including three species of silently flying owls and three non-silently flying bird species. The resulting data set described in the present paper contains the static airflow resistance measured at different positions on the wing.}, subject = {Owl wing; Air flow resistivity; Permeability; Silent flight; Acoustics; leiser Eulenflug; Str{\"o}mungswiderstand; Permeabilit{\"a}t; Eulenflug; Akustik; Eulen; Vogelflug; Str{\"o}mungswiderstand; Akustik; Permeabilit{\"a}t}, language = {en} } @article{SchneidereitBreuss2023, author = {Schneidereit, Toni and Breuß, Michael}, title = {Adaptive neural-domain refinement for solving time-dependent differential equations}, doi = {10.1186/s13662-023-03789-x}, year = {2023}, abstract = {A classic approach for solving differential equations with neural networks builds upon neural forms, which employ the differential equation with a discretisation of the solution domain. Making use of neural forms for time-dependent differential equations, one can apply the recently developed method of domain segmentation. That is, the domain may be split into several subdomains, on which the optimisation problem is solved. In classic adaptive numerical methods, the mesh as well as the domain may be refined or decomposed, in order to improve the accuracy. Also, the degree of approximation accuracy may be adapted. Therefore, it is desirable to transfer such important and successful strategies to the field of neural-network-based solutions. In the presented work, we propose a novel adaptive neural approach to meet this aim for solving time-dependent problems. To this end, each subdomain is reduced in size until the optimisation is resolved up to a predefined training accuracy. In addition, while the neural networks employed are by default small, we propose a means to adjust also the number of neurons in an adaptive way. We introduce conditions to automatically confirm the solution reliability and optimise computational parameters whenever it is necessary. Results are provided for several initial-value problems that illustrate important computational properties of the method.}, subject = {Neural forms; Differential equations; Physics-informed neural networks; Adaptive neural refinement; Domain decomposition; Neuronale Formen; Differentialgleichungen; Physikalisch informierte neuronale Netze; Adaptive neuronale Verfeinerung; Gebietszerlegung; Differentialgleichung; Neuronales Netz}, language = {en} } @article{FrimpongKorantengOpoku2023, author = {Frimpong, Bernard Fosu and Koranteng, Addo and Opoku, Fosu Senior}, title = {Analysis of urban expansion and its impact on temperature utilising remote sensing and GIS techniques in the Accra metropolis in Ghana (1986-2022)}, doi = {10.1007/s42452-023-05439-z}, year = {2023}, abstract = {The Accra Metropolis of Ghana has experienced rapid urban expansion over the past decades. Agricultural and forest-lands have been transformed into urban/built-up areas. This study analysed urban expansion and its relationship with the temperature of Accra from 1986 to 2022. Multi-source datasets such as remote sensing (RS) and other ancillary data were utilised. Land use land cover (LULC) maps were produced employing the random forests classifier. Land surface temperature (LST) and selected d(RS) Indices were extracted. Regression techniques assessed the interplay between LST and remote sensing indices. The LULC maps revealed increasing trends in the urban/built-up areas at the expense of the other LULC types. The analysis from the LST and the RS indices revealed a direct relationship between temperature and urban/built-up areas and an inverse relationship between temperature and vegetation. Thus, spatial urban expansion has modified the urban temperature of Accra. The integrated utilisation of RS and GIS demonstrated to be an efficient approach for analysing and monitoring urban expansion and its relationship with temperature.}, subject = {Urban expansion; Change detection; Land use land cover; Regression; Remote sensing; St{\"a}dtische Expansion; Erkennung von Ver{\"a}nderungen; Landnutzung Landbedeckung; Temperatur; Fernerkundung; Accra; Stadt; Expansion; Landnutzung; Temperatur; Fernerkundung}, language = {en} } @article{KoenigSharmaKondaetal.2023, author = {K{\"o}nig, Paul and Sharma, Dikshant and Konda, Karunakar Reddy and Xie, Tianxiao and H{\"o}schler, Klaus}, title = {Comprehensive review on cooling of permanent magnet synchronous motors and their qualitative assessment for aerospace applications}, doi = {10.3390/en16227524}, year = {2023}, abstract = {The permanent magnet synchronous motor (PMSM) can be a suitable candidate for electrified propulsion in aviation. Despite the very high efficiency, heat dissipation during operation leads to performance limitations. Elevated temperatures in the electrical insulations and the magnets pose a potential safety risk that must be reduced by selective cooling. A comprehensive review is conducted to capture current research interests in cooling methods in PMSM. Cooling methods are described according to their heat transfer mechanism, grouped, and assigned to the components within the motor. Key findings of the literature reviewed are described in the context of PMSM cooling. Information on cooling media and potential combinations of cooling methods in components is gathered. Assessment parameters such as safety, weight, effectiveness, integrability, complexity and cost are defined to enable a subsequent qualitative analysis for six selected cooling methods. A point-weighted evaluation approach, according to VDI 2225, was applied to identify the most promising cooling approach for successful implementation in aviation.}, subject = {Electrical machines; Electric aviation; Motor cooling; PMSM; Thermal management; Elektrische Luftfahrt; Elektrische Maschinen; Motork{\"u}hlung; W{\"a}rmemanagement; Luftfahrt; Raumfahrt; Elektroantrieb; Dauermagneterregter Synchronmotor; K{\"u}hlung}, language = {en} } @article{LangnerSieberRietigetal.2023, author = {Langner, Thomas and Sieber, Tim and Rietig, Anja and Acker, J{\"o}rg}, title = {A phenomenological and quantitative view on the degradation of positive electrodes from spent lithium-ion batteries in humid atmosphere}, doi = {10.1038/s41598-023-32688-0}, year = {2023}, abstract = {The present study deals with the phenomenological observation of the corrosion of the positive electrode foil of lithium-ion batteries containing LiNi0.6Co0.2Mn0.2O2 (NMC) as cathode material. Due to the presence of moisture, localized water accumulation is formed on the NMC surface. The water absorbed by the electrolyte reacts with the NMC under Li+/H+ exchange and the resulting pH increase leads to dissolution of the carrier foil and characteristic salt-like blooms on the NMC surface. With the increase in the relative area occupied by the holes in the aluminum foil per time, a sufficiently suitable parameter was found with which to quantitatively determine the extent of corrosion. The degree of degradation depends on time and ambient humidity. It was shown that functional recycling with the water jet method is no longer applicable for degraded foils, since the mechanical stability of the foils decreases as corrosion progresses. Lithium, aluminum, sulfur and oxygen were detected in the blooms using SEM-EDX and Laser-Induced-Breakdown-Spectroscopy (LIBS). The underlying NMC layer was found to contain mainly aluminum and significantly lower lithium content than the non-degraded material. SEM and Raman microscopy analyses also showed that the active material is also locally degraded and therefore no longer suitable for functional recycling.}, subject = {Analytical chemistry Surface chemistry; Inorganic chemistry; Materials chemistry; Process chemistry; Materials science; Analytische Chemie; Anorganische Chemie; Werkstoffchemie; Werkstoffkunde; Chemische Technik; Analytische Chemie; Lithiumbatterie; Elektrodenfolie; Korrosion; Recycling}, language = {en} } @phdthesis{Enow2023, author = {Enow, Ernest Ako}, title = {Possible synergy between FLEGT-VPA \& REDD+ towards improving forest governance framework in Cameroon}, doi = {10.26127/BTUOpen-6536}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65364}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Illegal logging is seen as a serious impediment to achieving sustainable management of forests in the tropics. In addition, deforestation contributes in increasing carbon dioxide emissions in the atmosphere, resulting to biodiversity loss and climate change. Illegal logging and deforestation have affected Cameroon's forest ecosystem negatively since the mid-1980s as a result of the economic crises, which intensified the exploitation of forest resources for multiple purposes. In response, some policy initiatives came up such as FLEGT-VPA and REDD+ to fight against the threats. It is due to the above background that this study was designed to examine the possible synergy between FLEGT-VPA and REDD+ towards improving the forest governance framework in Cameroon. The first part of the study assesses FLEGT-VPA in Cameroon with the application of interviews of key informants who were involved in the negotiation process of the EU-Cameroon Voluntary Partnership Agreement. The second part of the study assesses the management of Bimbia Bonadikombo Community Forest (BBCF), as one of the REDD+ pilot project sites around Mount Cameroon in the South West Region of Cameroon. The use of surveys, content analysis, and observations seeks to assess these two initiatives in their role in improving forest governance in Cameroon. The first part of the research reveals that since Cameroon ratified the FLEGT-VPA in 2011, there has been progressed concerning stakeholder participation in forest-related issues. Again, the study also reveals challenges faced with the setting up of a system to verify timber from legal origin as recommended by the European Union. The research further reveals a lack of commitment by the government in revising the current forest policies and re-organizing the domestic market for timber trade as part of the commitment made by the government during the ratification of the FLEGT-VPA. The second part of the study finds that the management of BBCF is not governed by the provision of the Cameroon community forestry manual or by its bylaws posing doubts if community forestry can halt emissions of greenhouse gases caused by deforestation, thus helping REDD+ achieve its objectives. The study recommends the need for rapid policy reform and a cross-sectoral transformation to enable FLEGT-VPA and REDD+ to synergize for a better policy outcome on issues concerning forestry and climate change.}, subject = {Cameroon; FLEGT-VPA; REDD+; Illegal logging; Policy; Kamerun; Illegale Abholzung; Entwaldung; Politik; Kamerun; Umweltpolitik; Forstverwaltung; Rodung; Kohlendioxidemission; Klima{\"a}nderung; REDD; Forstrecht}, language = {en} } @phdthesis{Sain2022, author = {Sain, Chetan Kumar}, title = {Concepts development of variable fan nozzle for future generation of aeroengines}, doi = {10.26127/BTUOpen-6515}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65158}, school = {BTU Cottbus - Senftenberg}, year = {2022}, abstract = {The next generation of civil turbofan engines targets the by-pass ratios of up to 20:1, requiring an innovative fan design with a low fan pressure ratio, low specific thrust and a radically increased fan diameter. The aerodynamic stability of such a large slow rotating fan is very sensitive against the back-pressure variations in the by-pass duct, especially during the take-off operations. The back-pressure regulation can be achieved significantly through a Variable Area Fan Nozzle (VAFN). This work deals with the design development of VAFN concepts for ultra-high by-pass ratio engines which was researched in EU funded program ENOVAL and received funding under grant agreement number 604999. A system engineering approach was implemented for the VAFN development by following the requirements in conceptual, preliminary and detailed design phases. The design domains in the rear nacelle and under the core fairing were selected for the concept generation. Several qualitative and quantitative trade studies were conducted to down-select the best-fit solution during each design phase. These included the kinematic simulations of various types of VAFN modulations; analytical calculations to understand the thermodynamics of the selected VAFN kinematics; aerodynamic performance predictions using CFD simulations on a large number of preliminary designs; 3D CFD simulations for detailed performance assessments including the design optimization of individual features and distortions due to failed modulations; and FEM calculations for the topology generation and optimization of structural components. The overall weighted effect was determined for each output parameter and the results were presented in percentile changes relative to that with a fixed nozzle reference geometry. Two VAFN concepts were selected for the final detailed design phase, Flaps in rear nacelle domain and Variable Inner Fairing Structure (VIFS). Both concepts showed better outputs in terms of specific fuel consumption, noise emission and fan's safety margin during the take-off, with an over-area exhaust position than those with a fixed nozzle operation. During the climb phase, with an under-area VAFN position, both concepts resulted in drawbacks due to higher aerodynamic losses relative to the fixed nozzle. During MCR, both the VAFN concepts with stowed positions caused losses mainly due to leakages and higher structural weights relative to the fixed nozzle configuration. For each VAFN concept, a detailed system definition was developed and the function trees for each operation were explained. A discrete modulation type with two positions was described and recommended for both concepts. This included an over-area deployed position for the take-off phase and a stowed position for the rest of the flight, based on the beneficial performance of the VAFN concepts over the fixed clean nozzle configuration.}, subject = {Variable area fan nozzle; Ultra high bypass ratio turbofan engine; Performance analysis; Bypass duct; Fan nozzle structural analysis; Turbofan-Triebwerk; Variable Fan-D{\"u}se; Leistungsanalyse der D{\"u}se; D{\"u}senkonzept; Designentwicklung; Mantelstromtriebwerk; D{\"u}se; Thermodynamik; Design}, language = {en} } @phdthesis{Spiess2023, author = {Spieß, Benjamin}, title = {The artificial engineer : a smart holistic framework for the automated transfer of geometry to analysis models}, doi = {10.26127/BTUOpen-6530}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65308}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {The creation of adequate simulation models for complex assemblies is an extensive process that requires a lot of experience, and on the other hand involves a multitude of manual, tedious tasks. These are significant obstacles for improving the process performance and capabilities. The objective of this research is to develop methods which digitally imitate the way of thoughts of the engineer in the design process towards a digital system understanding and which support the automation of the involved manual workflow. This thesis presents a strategy to translate engineering reasoning and actions to an equivalent in the computer domain. A cardinal step is to gain understanding of system arrangements, boundary conditions and its components. Based on this evaluation, the identification of assembly parts is forming the foundation for optimized process chains for the transfer to the analysis environment. Model complexity relates to computational effort, which in turn affects model capabilities and manageability. To achieve a satisfactory compromise of model quality and complexity, this transfer process is strongly dependent on the visual analysis, reasoning and manual implementation of skilled engineers. The principle of translating engineering logics is pursued from the assembly system to its smallest parts. Component segmentation methods allow subdividing regions of interest into substructures which are assigned with a feature vector. This vector comprises metrics describing the substructures with regard to specific aspects and is the key decision point for subsequent steps as idealization, suitable Finite-Element modeling and ultimately building an analysis model. The created system database is continuously maintained and supports these process chains as well as the final setup of the assembly simulation model. An automated workflow like this implies advantages for efficiency, but also creates opportunities for further use cases. This workflow has been exploited for generating a training data set from the different simulation variants as a basis to a knowledge representation imitating engineering experience. An algorithm from the graph neural network field is applied to this data set as a conceptual approach. The intention pursued in this concept is to model the learning progress about estimating the influence of modelling decisions on simulation results and quality. This research proposes a holistic strategy and describes methods to achieve the objectives of decreasing manual effort, introducing an automated and geometry-based process and digitally replicating engineering experience by introducing a knowledge database.}, subject = {Engineering; Automation; Artificial intelligence; Design; Machine learning; Automatisierung; Simulation; K{\"u}nstliche Intelligenz; CAD; FEM; Automatisierung; CAD; Finite-Elemente-Methode; K{\"u}nstliche Intelligenz; Simulation}, language = {en} } @phdthesis{BattisSchinker2023, author = {Battis-Schinker, Eva}, title = {Assessing authenticity in heritage conservation : case study : architectural conservation in Bahrain}, doi = {10.26127/BTUOpen-6511}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65118}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {The thesis complements the authenticity discourse in heritage conservation with the perspective of laypeople and evaluates the pertinent methodology for the application of the normative concept in architectural heritage conservation. Based on the Nara Document on Authenticity, the Operational Guidelines for the Implementation of the World Heritage Convention anchor the concept in the credibility and truthfulness of internal and external factors - referred to as information sources - that communicate a heritage site's cultural values. Conversely, the author explored the truthfulness of messages conveyed to site users in a qualitative research based on interviews focused on two urban reference sites in Bahrain. These stand for different eras and conservation approaches: the ensemble of colonial-style governmental buildings at Bab al-Bahrain in Manama and the vernacular Siyadi Shops in the market area Suq al-Qaisariya in Muharraq, which were restored in the course of a World Heritage nomination. The interpretive content analysis compares how architects and non-architects, who represent laypeople in architectural conservation, perceived their authenticity and also traces cultural contingencies. The empirical data confirms pronounced differences in the way architects and non-architects perceive authenticity but only a few between representatives of so-called Western and Eastern cultures. Assessed against international heritage conservation standards, the site in Muharraq proved more authentic than the one in Manama. However, the meanings produced in the interaction between the sites and the interviewees proved be of limited truthfulness in both cases. A key finding is hence that a constructivist authenticity concept can serve no normative function when heritage conservation is considered a discipline at the service of historiography. While all potential factors of authenticity as per the Nara Document proved to be relevant, perceived material authenticity was found to be an outstanding reason why the site in Muharraq was appreciated more. Its rehabilitation was found to successfully reconcile essentialist and constructivist authenticity understandings by paying tribute both to the documentary value of the historic site and to the experiential needs of its users. The findings support the ICOMOS Venice Charter's material-focused approach while confirming the relevance of a broadened authenticity understanding and highlighting the importance of integrated, participatory approaches to heritage conservation. By illustrating the importance of expertise when assessing the authenticity of architectural heritage, the findings at the same time flag limits to democratizing architectural conservation practice. The author recommends developing practice-oriented guidance for the assessment of authenticity of heritage sites based on further research and to add interpretation facilities to the list of factors of authenticity.}, subject = {Authentizit{\"a}t; Baudenkmalpflege; UNESCO Welterbe; ICOMOS Charta von Venedig; Bahrain; Authenticity; Architectural conservation; UNESCO World Heritage; ICOMOS Venice Charter; Bahrain; Bahrain; Baudenkmal; Denkmalpflege; Authentizit{\"a}t; Internationale Charta {\"u}ber die Erhaltung und Wiederherstellung von Denkmalen}, language = {en} } @misc{OPUS4-6510, title = {Culture, capital, urban transformation : insights into urban development in Timisoara, Novi Sad and Belgrade}, editor = {Weidner, Silke and Viderman, Tihomir}, issn = {2702-6892}, doi = {10.26127/BTUOpen-6510}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65102}, year = {2022}, abstract = {In the summer term 2020 the Chair of Urban Management, BTU Cottbus-Senftenberg, conducted an excursion for Master students of planning and architecture to the region on both sides of the border between Romania and Serbia in a format of distance learning. Over three days the students and local experts of various professional backgrounds engaged online in discussion on urban development in Timișoara, Novi Sad and Belgrade. We explored how the dynamics of changing physical and social boundaries shape urban territories in a tension between centrality and periphery, while also engaging with the paradigm shift in planning centred on culture and people's participation, as well as anticipations from flagship culture schemes to trigger positive urban changes. This publication provides summaries of some of the contributions, illuminating urban development as a complex process which involves a plurality of geopolitical shifts, engaged actors, interests, perspectives, hope-filled approaches and instruments.}, subject = {Transition; Urban development; Social space; Participation; European Capital of Culture; {\"U}bergang; Stadtentwicklung; Sozialer Raum; Beteiligung; Kulturhauptstadt Europas; Rum{\"a}nien; Serbien; Grenzgebiet; Kulturhauptstadt; Stadtentwicklung; B{\"u}rgerbeteiligung}, language = {mul} } @phdthesis{Ilić2023, author = {Ilić, Aleksandar}, title = {Strategies for increasing maximum throughput and reducing latency in tree-based WSNs}, doi = {10.26127/BTUOpen-6498}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64986}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {This thesis deals with strategies for achieving high data throughput in wireless sensor networks that use a time division multiple access (TDMA) scheme to resolve medium access. The thesis uses a multi-sided approach that deals not only with the scheduling algorithm but also with the network layer and the interference model. The thesis proposes four solutions that significantly improve data throughput, fairness, and latency in the considered scenario. The thesis starts with an overview of state-of-the-art medium access control (MAC) protocols, emphasizing TDMA. Based on this overview, it is concluded that not much space for improvement is left in the field of schedule calculation algorithms; many such algorithms are proposed up to date, and they can achieve schedule lengths close to the theoretical minimum. However, the research also reveals a lack of in-detail evaluation and comparison of these algorithms; this makes choosing the most suitable algorithm for a particular application hard and performance estimation inaccurate. Therefore, an extensive evaluation of state-of-the-art TDMA protocols using simulations and over 200 randomly generated networks was performed to tackle this issue. The results allow choosing an appropriate algorithm and estimating performance for each specific application. Next, the problem of multiple packet transmissions during a single time slot is analyzed. State-of-the-art TDMA protocols assume that one packet can be transmitted in each slot and optimize the number of slots each node gets under this assumption. However, when nodes can transmit more than one packet, the performance of such a schedule is impaired. To solve this, the M-TreeMAC protocol is proposed; this protocol considers the actual number of packets transmitted in a time slot and optimizes the schedule accordingly. Furthermore, it is observed that the routing topology heavily impacts the schedule length created using this algorithm; an algorithm that optimizes the topology to result in the shortest schedule when M-TreeMAC is used is proposed, increasing benefits even further. Finally, the accuracy of the 2-hop interference model, commonly used by state-of-the-art TDMA scheduling algorithms, is studied and simulated using a realistic radio model based on measurement results. The results show high packet loss ratios for packets traveling a large number of hops to reach the sink. The adaptive interference model is proposed to improve the 2-hop interference model. The proposed model can increase throughput significantly in networks with a height of ten or more hops.}, subject = {WSN; TDMA; Interference; Throughput optimization; Drahtlose Sensornetzwerke; Interferenz; Maximierung des Datendurchsatzes; Zeitmultiplexverfahren; Drahtloses Sensorsystem; Funk{\"u}bertragung; TDMA; Energieeffizienz}, language = {en} } @phdthesis{Stolz2023, author = {Stolz, Michael}, title = {Ermittlung und Beurteilung der Zuverl{\"a}ssigkeit von lateralen elektrostatischen Nanoaktoren und ihr Einfluss auf zuk{\"u}nftige Anwendungen}, doi = {10.26127/BTUOpen-6533}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65332}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {In dieser Dissertation wurden Zuverl{\"a}ssigkeitsaspekte der NED-Aktoren betrachtet und ihre Langzeitstabilit{\"a}t untersucht. Die Langzeituntersuchungen an einzelnen NED-Aktoren haben gezeigt, dass insbesondere große elektrische Felder zur Verk{\"u}rzung der Lebensdauer der Aktorik f{\"u}hren k{\"o}nnen. Elektrische Felder beschleunigen Oxidation der NED-Siliziumelektroden. Dabei wurden zwei unterschiedliche Oxidationsmechanismen beobachtet: die anodische Oxidation von Siliziumelektroden im Isolatorbereich und die feldemissionsunterst{\"u}tzte Oxidation. Die beiden Degradationsmechanismen beg{\"u}nstigen das Wachstum des Siliziumoxides an Siliziumelektroden und resultieren in der Ver{\"a}nderung der Oszillationseigenschaften der NED-Aktoren mit der Zeit. Weitere Untersuchungen an den NED-basierten Anwendungen - Mikrolautsprecher haben verdeutlicht, dass solche Faktoren wie Feuchtigkeit die Degradation am meisten forcieren. Durch Passivierung der Aktoren, wobei sie z. B. mit Aluminiumoxid im ALD-Verfahren verkapselt werden, k{\"o}nnen unerw{\"u}nschte Degradationsmechanismen deutlich verlangsamt werden. Durch eine geeignete Materialwahl bei der Verkapselung kann sogar gleichzeitig die Effizienz der Aktoren verbessert werden.}, subject = {Nanoaktor; NED; Zuverl{\"a}ssigkeit; MEMS; Nanoscopic electrostatic drive; Nano actuators; Reliability; Mikroaktor; MEMS; Zuverl{\"a}ssigkeit}, language = {de} } @misc{SeemannHerz2023, type = {Master Thesis}, author = {Seemann-Herz, Lisanne}, title = {Schulbezogene Anti-Hatespeech-Programme : eine kriteriengeleitete Bestandsaufnahme}, isbn = {978-3-940471-76-5}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65257}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Das Ph{\"a}nomen Hatespeech gewinnt zunehmend Aufmerksamkeit in der {\"O}ffentlichkeit und in der Forschung. Das ist insofern wichtig, weil Hass, Hetze und Diskriminierung gegen{\"u}ber Menschen, die einer bestimmten Gruppe zugeordnet werden, vor allem {\"u}ber Informations- und Kommunikationstechnologien eine gesamtgesellschaftliche Verrohung zur Folge hat. Hatespeech schr{\"a}nkt die Meinungsvielfalt ein und bedeutet eine Bedrohung f{\"u}r die Demokratie. Sie stellt jedoch kein reines Netzph{\"a}nomen dar, sondern basiert auf real existierende Macht- und Diskriminierungsstrukturen. Das Ph{\"a}nomen einzud{\"a}mmen, ist die Intention verschiedener Stiftungen und Initiativen. Hatespeech ist jedoch allgegenw{\"a}rtig und selbst in der Schule verbreitet. Sie stellt damit eine Gefahr insbesondere f{\"u}r junge Heranwachsende und weiterf{\"u}hrend f{\"u}r das allt{\"a}gliche Schulleben dar. Somit stellt sich die Frage, welche Mittel der Institution Schule zu Verf{\"u}gung stehen, um dem Ph{\"a}nomen wirksam entgegenzutreten. Im Zuge von pr{\"a}ventiven und interventiven Maßnahmen stehen schulbezogene Programme im Vordergrund. Die vorliegende Masterthesis befasst sich daher mit einer ersten Bestandsaufnahme von deutschsprachigen, schulbezogenen Programmen zur Pr{\"a}vention und Intervention bei Hatespeech unter Kindern und Jugendlichen (Jahrgangsstufen 5 bis 12). Insgesamt konnten 14 entsprechende Programme im Rahmen der Recherchearbeit identifiziert werden. Diese wurden auf ihre Inhalte und Durchf{\"u}hrungsmodalit{\"a}ten sowie anhand von f{\"u}nf ausgew{\"a}hlten Qualit{\"a}tskriterien analysiert und hinsichtlich ihrer Anwendung in der schulischen Praxis beschrieben und er{\"o}rtert. Die {\"U}bersicht {\"u}ber Schwerpunkte, St{\"a}rken sowie Entwicklungspotentiale schulbezogener Hatespeech-Programme soll eine informierte Entscheidung {\"u}ber den Einsatz der Programme in der Schule und dar{\"u}ber hinaus in der offenen Kinder- und Jugendarbeit erm{\"o}glichen.}, subject = {Schule; Pr{\"a}vention; Intervention; Kindes- und Jugendalter; Hate speech; School; Prevention; Intervention; Childhood and adolescence; Diskriminierung; Hassrede; Intervention; Kind; Jugend; Pr{\"a}vention; Schule; Hatespeech}, language = {de} } @techreport{ObermuellerRadvanSchiffner2023, type = {Working Paper}, author = {Oberm{\"u}ller, Christian and Radvan, Heike and Schiffner, Johanna}, title = {„Es w{\"a}re gut, wenn Putin hier mal auskehren k{\"o}nnte" : Analysen zu Mobilisierungen (extrem) rechter Akteure in Cottbus in Reaktion auf den russischen Angriffskrieg gegen die Ukraine 2022}, doi = {10.26127/BTUOpen-6504}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65043}, year = {2023}, abstract = {Die Stadt Cottbus ist seit mehreren Jahren durch extrem rechte und verschw{\"o}rungsideologische Mobilisierung herausgefordert. Auch in der Covid-19-Pandemie ist Cottbus Schauplatz regelm{\"a}ßiger Demonstrationen. Mit Beginn des russischen Angriffskriegs auf die Ukraine verschiebt sich der inhaltliche Fokus der sogenannten Montagsspazierg{\"a}nger sukzessive weg von der Pandemie und hin zum Krieg. Die hier vorliegende Forschung wendet sich den Protestveranstaltungen zu, die im Zeitraum vom 28. Februar bis 24. Oktober 2022 in Cottbus in Reaktion auf den russischen Angriffskrieg organisiert werden und untersucht unter Anwendung der Grounded Theory ausgew{\"a}hlte Redebeitr{\"a}ge. Sie zielt darauf ab, die Inhalte und Darstellungsweisen der RednerInnen hinsichtlich der Gefahrenpotentiale einzuordnen und im Sinne anwendungsbezogener Forschung in Richtung Pr{\"a}vention und zivilgesellschaftlicher Gegenwehr weiterzudenken. Die Forschung zeigt: {\"A}hnlich wie in anderen ostdeutschen St{\"a}dten sind auch in Cottbus die Veranstaltungen von extrem rechten Akteuren und Gruppen dominiert; sie werden unterst{\"u}tzt von Teilen eines b{\"u}rgerlichen Milieus der sogenannten gesellschaftlichen Mitte. Sichtbar wird außerdem: Akteure aus dem Coronaprotestmilieu haben sich weiter radikalisiert; verschw{\"o}rungs- und insbesondere reichsb{\"u}rgerideologische Inhalte dominieren die untersuchten Veranstaltungen und mischen sich mit prorussischen Positionen und dem Ideologem einer „eurasischen" Neuordnung des europ{\"a}isch-asiatischen Raums. Die Ablehnung „des Westens" bildet ein wiederkehrendes Metanarrativ.}, subject = {Rechtsextremismus; Verschw{\"o}rungsideologie; Reichsb{\"u}rger; Ostdeutschland; Rekonstruktive Forschung; Souver{\"a}nismus; Right-wing extremism; Conspiracy ideology; East Germany; Reconstructive research; Sovereignism; Cottbus; Demonstration; Grounded theory; Protestbewegung; Rechtsradikalismus; Verschw{\"o}rungstheorie}, language = {de} } @phdthesis{Nehme2023, author = {Nehme, Sarkis}, title = {Sustainability assessment of bread production : the case of artisan bakeries in Germany}, doi = {10.26127/BTUOpen-6516}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65169}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Background: Food sustainability is becoming increasingly important for the achievement of sustainable development goals, especially in light of recent global challenges of climate change, geopolitical conflict and the increasing vulnerability of food systems. The world is emphasising the importance of holistic approaches to agriculture and food systems to tackle these challenges. Germany's Sustainable Development Strategy for 2030 associates SDGs 2, 3 12 and 15 with sustainable agriculture and food systems as crucial elements to achieve these goals. However, with the lack of knowledge in this area, and the scarcity of tools to monitor and assess food sustainability, it has become crucial to investigate potential holistic approaches and frameworks to assess the sustainability of food systems. Purpose: This study uses the national framework of Sustainable Development Goals (SDGs), as the only available valid holistic framework, to explore the sustainability of the bread system in Germany. It operationalises the SDGs to bakery level to identify significant indicators that could, potentially, be used to assess the sustainability of artisan bakeries, and identify to which SDGs the bakeries contribute. Methods: This study utilises a mixed-methods research design to address the multi-disciplinary nature of the food sustainability concept. It critically evaluates the SDG framework and identifies a set of indicators, which are expanded with further indicators to address the cultural dimension of bread as a cultural heritage. To collect data, a 26-item questionnaire was issued to 586 artisan bakeries with a response rate of 8.8\% (n = 52); the 52 bakeries own 562 branches. This was followed by interviews with an acceptance rate of 19\% (n = 10). Descriptive and inferential statistics were used to analyse the quantitative data, while the interviews were transcribed from German to English and coded using NVivo 11. Results: Sustainable bread is redefined from a holistic perspective encompassing theory, policies and artisan bakeries. The results confirm that bakeries positively contribute to bread sustainability in Germany, as well as towards achieving the national SDGs. Progress areas include energy efficiency, sustainable packaging, local procurement, heritage promotion, waste reduction and ecolabels. Interestingly, individual bakeries appear to be slightly more sustainable than chains due to their flexibility in adapting to new practices and their use of organic products; however, chain bakeries are slightly less sustainable, but are proven to be more efficient in terms of productivity and market reach.}, subject = {Food sustainability; Sustainable bread; Sustainability assessment; German bread; Lebensmittelnachhaltigkeit; Nachhaltigkeitsbewertung; Handwerksb{\"a}ckereien; Deutsches Brot; Nachhaltige Lebensmittel; Deutschland; B{\"a}ckerhandwerk; Brotherstellung; Nachhaltigkeit; Vereinte Nationen: Agenda 2030 f{\"u}r nachhaltige Entwicklung}, language = {en} } @phdthesis{Saha2023, author = {Saha, Sanjit Kumar}, title = {A relevance feedback approach for social network clustering in the context of triangle inequality violations}, doi = {10.26127/BTUOpen-6519}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65199}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {People in a social network are connected, and their homogeneity is reflected by the similarity of their attributes. For effective clustering, the similarities among people within a cluster must be much higher than the similarities between different clusters. Traditional clustering algorithms like hierarchical (agglomerative) or k-medoids take distances between objects as input and find clusters of objects. The distance functions used should comply with the triangle inequality (TI) property, but sometimes this property may be violated, thus negatively impacting the quality of the generated clusters. However, in social networks, meaningful clusters can be found even though TI violates. One possibility is a quantum-logic-based clique-guided non-TI clustering approach. The commuting quantum query language (CQQL) is the base for this approach. The CQQL allows the formulation of queries that incorporate both Boolean and similarity conditions. It calculates the similarity value between two objects. Furthermore, attributes may not have equal impact on similarity and affect the resulting clusters. CQQL incorporates weights to express the varying importance of sub-conditions in a query while preserving consistency with Boolean algebra. This enables personalization of results through relevance feedback (RF). The main challenge of comparing clusterings is that there is no ground truth data. In such situations, human-generated gold standard clustering can be used. The question is how to compare the performance of clusterings. A noteworthy technique involves counting the pairs of objects that are grouped identically in both clusterings. By doing so, a clustering distance is calculated that measures the dissimilarity. To validate the non-TI clustering approach, experiments are conducted on social networks of different sizes. Three central questions are addressed by the experiments mentioned: first, is it possible to find meaningful clusters even though TI violates; second, how does a user interact with the system to provide feedback based on their needs; and third, how fast do the detected clusters based on the proposed approach converge to the ideal solution? To sum up, the experiments' objective is to demonstrate the validity of a theoretical approach. The research findings presented here provide sufficient evidence for detecting meaningful clusters based on user interaction. Furthermore, the experiments clearly demonstrate that the non-TI clustering approach can be used as an RF technique in clustering.}, subject = {Social network clustering; CQQL; Relevance feedback; Non-TI clustering; Clustering distance; Clustering sozialer Netzwerke; Relevanz-Feedback; Clustering-Abstand; Social media; Online-Community; Cluster-Analyse; Relevanz-Feedback}, language = {en} } @phdthesis{Barounga2023, author = {Barounga, Abdel Kader}, title = {The formal primary educational system and the safeguarding of intangible cultural heritage in Africa : case of the Far North Region of Cameroon}, doi = {10.26127/BTUOpen-6487}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64874}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {The present research aims to analyze the possibilities of introducing the living "Intangible Cultural Heritage" as Supplement of Knowledge into the formal educational system particularly the Early Childhood Education in the Far North Region of Cameroon - irrespective of the 2003 Convention for the Safeguarding of the Intangible Cultural Heritage and the 2005 Convention on the Protection and Promotion of the Diversity of Cultural Expressions. This Region is purposively selected for its stronghold of multifarious and diverse ethno-cultural (id)entities and citadel of the country's enshrined traditions. The rural area of Kolara is conveniently chosen to explore how to blend the receding ethno-cultural heritage with the formal education system in accordance with the aim of education in Cameroon and therefore could be an example of how to train citizens firmly rooted in their cultures but also opened to the world. It presupposes that the current formal primary educational system is not constructive for primary school starters. On the basis of a combination of participatory research and systematic data collection methods, three educational heritages could be outlined: the ethno-cultural traditional educations specific to the two major ethno-cultures Tupuri and Fulb{\´e} and the Islamic Arabic educational heritage peculiar to Muslims, predominantly Fulb{\´e}. In this context, it could be determined to what extend the formal education is ethno-cultural specific, environment related and learner centered.}, subject = {Formal education; Ethno-cultural heritage; Ethno-culture; Ethno-cultural education; Pedagogy; Formale Bildung; Ethnokulturelles Erbe; Ethnokultur; Ethnokulturelle Bildung; P{\"a}dagogik; Sachunterricht; Kulturp{\"a}dagogik; Tupuri; Fulbe}, language = {en} } @misc{OPUS4-6489, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,22 (29.09.2023)}, doi = {10.26127/BTUOpen-6489}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64898}, year = {2023}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Studiengang Lehramt Primarstufe Bachelor (PrimPStO-BA) vom 28. September 2023}, language = {de} } @inproceedings{OPUS4-6473, title = {22nd EEEIC International Conference on Environment and Electrical Engineering - Student Edition : Wrocław - Ostrava - Cottbus, June 2023}, editor = {Schwarz, Harald and Janik, Przemysław and Gono, Radomir and Lehmann, Dirk}, doi = {10.26127/BTUOpen-6473}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64732}, year = {2023}, abstract = {In the time of increased awareness about the environment problems by the public opinion and also intensive international efforts to reduce emissions of greenhouse gases, as well increase of the generation of electrical energy to facilitate industrial growth, the conference offers broad contribution towards achieving the goals of diversification and sustainable development. Focus of the student conference is to promote the discussion of views from scientists and students from Wroclaw University of Technology, Technical University of Ostrava and Brandenburg University of Technology Cottbus-Senftenberg. The conference is a unique teaching session motivating the students to write science related papers, prepare presentations and discus future developments. It is a formal part of the curriculum offered as an elective module, accompanied by a technical excursion.}, subject = {Power quality; Elektrische Energie; Energietechnik; Energievorrat; Umweltbezogenes Management; Energy ressources; Energy system transformation; Environmental management; Energiequalit{\"a}t; Energieressourcen; Energietechnik; Energiewende; Umweltmanagement}, language = {en} } @misc{OPUS4-6488, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,21 (27.09.2023)}, doi = {10.26127/BTUOpen-6488}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64889}, year = {2023}, abstract = {Vierte {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Euro Hydroinformatics and Water Management (EuroAquae) vom 26. September 2023}, language = {de} } @misc{OPUS4-6434, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,20 (26.09.2023)}, doi = {10.26127/BTUOpen-6434}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64344}, year = {2023}, abstract = {1. Erste {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Bauingenieurwesen (B. Sc.) vom 21. September 2023 2. Lesefassung: Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Bauingenieurwesen (B. Sc.) vom 04. Oktober 2022 i. d. F. der ersten {\"A}nderungs-satzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Bauingenieurwesen (B. Sc.) vom 21. September 2023}, language = {de} } @misc{OPUS4-6433, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,19 (26.09.2023)}, doi = {10.26127/BTUOpen-6433}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64339}, year = {2023}, abstract = {1. Erste {\"A}nderungssatzung zur fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Architektur vom 21. September 2023 2. Lesefassung: Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Architektur (M. Sc.) vom 29. September 2022 i. d. F. der ersten {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Architektur (M. Sc.) vom 21. September 2023}, language = {de} } @techreport{SchmidWinkler2023, author = {Schmid, Stefan and Winkler, Herwig}, title = {Die Produktionssteuerung im digitalen Zeitalter aus Sicht der industriellen Praxis}, organization = {BTU Cottbus-Senftenberg, Lehrstuhl f{\"u}r Produktionswirtschaft}, doi = {10.26127/BTUOpen-6500}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-65009}, year = {2023}, abstract = {Im Zeitraum von M{\"a}rz bis Juni 2023 wurde vom Lehrstuhl f{\"u}r Produktionswirtschaft der BTU Cottbus-Senftenberg die Studie mit dem Titel „Die Produktionssteuerung im digitalen Zeitalter" als Online-Umfrage durchgef{\"u}hrt. 125 Personen mit operativen, planerischen und strategischen Funktionen in der Produktion oder des produktionsnahen Umfeldes beantworteten den Fragebogen. Die Studie zeigt, dass bei vielen Praktikern ein sehr klares Bild vorherrscht, was die Produktionssteuerung der Zukunft leisten muss. Die Erweiterung der Produktionssteuerung um K{\"u}nstliche Intelligenz wird in sehr starkem Maße als sinnvoll erachtet, um die Effizienz am Shop-Floor bei hoher Komplexit{\"a}t der Leistungsprozesse auch in Zukunft aufrechtzuerhalten. Die ausgewerteten Daten zeigen, dass die aktuellen Systeme der Produktionssteuerung die Nutzer nicht in dem Ausmaß unterst{\"u}tzen, wie es erwartet wird. Die Nutzer sind gefordert, ihr Wissen und ihre Kompetenzen einzusetzen, um funktionale Defizite der Anwendungen zu kompensieren. Die Kooperation von Menschen und KI in der Produktionssteuerung wird als sinnvoll angesehen. Dabei wird eine Kombination aus menschlicher Arbeit und KI-Unterst{\"u}tzung bevorzugt, w{\"a}hrend eine vollautonome KI seltener favorisiert wird. Die Studienergebnisse zeigen eine wachsende Zustimmung und Offenheit f{\"u}r den Einsatz von KI als Werkzeug in der Produktionssteuerung, jedoch unter menschlicher Aufsicht und Beteiligung. Die Herausforderungen der Integration von K{\"u}nstlicher Intelligenz in die Mensch-Maschine-Interaktion umfassen technische und soziale Aspekte. Um diesen Herausforderungen zu begegnen, sind geeignete L{\"o}sungsans{\"a}tze notwendig, wie die Entwicklung sicherer Schnittstellen, robuste Datenschutzmaßnahmen aber auch Nutzerakzeptanzf{\"o}rderung durch Aufkl{\"a}rung und Schulung. Innerhalb eines hybriden Rahmens, wo der Mensch mit der KI arbeitet, m{\"u}ssen klare Regeln f{\"u}r die Interaktion definiert werden. Die KI soll die menschliche Entscheidungsfindung interaktiv unterst{\"u}tzen, neue Perspektiven bieten und alternative Vorschl{\"a}ge unterbreiten. Insgesamt betonen die Ergebnisse der Umfrage die Bedeutung von Sicherheit, Transparenz, Kontrolle und die Validierung von KI-Entscheidungen durch menschliche Akteure. Es zeigt sich, dass die Kombination von Menschen und KI nicht nur technologische Vorteile bietet, sondern auch dazu beitragen kann, nachhaltig wirtschaftlichere Ergebnisse zu erzielen.}, subject = {Digitalisierung; Automatisierung; Production control; Artificial intelligence; Digitization; Produktionssteuerung; Mensch-Maschine-Kommunikation; K{\"u}nstliche Intelligenz; Automation}, language = {de} } @phdthesis{Kommana2023, author = {Kommana, Giulia}, title = {Biogeochemical signatures in sediments by iron from mining areas : case study River Spree (NE Germany)}, doi = {10.26127/BTUOpen-6470}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64708}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {During open-cast lignite mining in Lusatia (NE Germany), iron sulfide minerals associated with lignite, are exposed to air and weather. The weathering products iron (Fe), sulfate and acids subsequently enter the fluvial-lacustrine system Spree and its tributaries. The aim of this work was to identify and explain the evolving biogeochemical signatures (spatio-temporal patterns) in River Spree. These signatures are significantly influenced by biogeochemical turnover processes triggered by iron input. To identify the signatures, a regional field study was conducted from the inland delta Spreewald to the mouth. This study was followed by two laboratory experiments under controlled redox conditions to investigate the effect of Fe on the long-term binding of phosphorus and the degradation of particulate organic material in the iron-enriched sediments. Characteristic elements introduced by lignite mining (iron, sulfur, aluminum, cobalt, nickel) and by urban areas (zinc, lead, copper, chromium) could be determined by means of a principal component analysis. Based on these findings, the impact range of the open-cast mining was determined to be at least ~ 90 km downstream of the Spreewald. Within the urban-influenced systems F{\"u}rstenwalde and Berlin, the urban signature is more dominant than the mining signature. By means of sequential extractions and XRD analyses of the sediments, iron binding forms and characteristic iron minerals have been additionally identified (e.g., Fe(III) oxyhydroxides, pyrite, vivianite). Sediment analyses and column experiments have shown that iron increases the phosphorus sorption and decreases the phosphorus release in the sediments of three studied lakes of the fluvial-lacustrine system. However, the application of different phosphorus retention models for Lake Neuendorfer See showed that Fe cannot reduce the eutrophic state of the lakes along the river, since the water retention times are too short and the external phosphorus loads are too high. Additionally, lake sediments with different Fe contents have been incubated with particulate organic material. Higher Fe contents resulted in reduced emissions of the greenhouse gases CO₂ and CH₄, which can be attributed to a reduced degradation of organic matter by Fe. Possible reasons include sorption processes of (dissolved) organic matter onto Fe oxyhydroxides and toxic effects of iron on microorganisms. Nevertheless, Fe (and sulfate) are available as electron acceptors during the decomposition of organic matter in River Spree. The findings of this work deepen the understanding of the impact of iron from mining on sulfur, phosphorus and carbon turnover processes in fluvial-lacustrine systems. As a consequence of the Fe input from the Lusatian area, the signature will persist for decades in River Spree.}, subject = {Iron; Lignite mining; Sediment composition; Biogeochemical processes; Element cycling; Eisen; Braunkohleabbau; Sedimentzusammensetzung; Biogeochemische Prozesse; Elementkreisl{\"a}ufe; Spree; Biogeochemie; Braunkohlentagebau; Eisen; Phosphor; Flusssediment; Hauptkomponentenanalyse}, language = {en} } @techreport{WinklerHoffmannThomas2023, author = {Winkler, Herwig and Hoffmann, Stefanie and Thomas, Kevin}, title = {Technologische Trends und Entwicklungen bei alternativen Energiesystemen}, organization = {BTU Cottbus-Senftenberg, Lehrstuhl f{\"u}r Produktionswirtschaft}, doi = {10.26127/BTUOpen-6484}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64847}, year = {2023}, abstract = {Im Zeitraum von Februar bis Mai 2023 wurde am Lehrstuhl f{\"u}r Produktionswirtschaft die Studie zum Thema „Technologische Trends und Entwicklungen alternativer Energiesysteme" durchgef{\"u}hrt. Die vorliegende explorative Studie basiert auf leitfadengest{\"u}tzten Interviews von 54 Experten und Expertinnen aus Forschungsinstituten, der Wirtschaft sowie Branchenverb{\"a}nden. Die Auswertung der Interviews folgte dem Prinzip der strukturierenden Inhaltsanalyse. F{\"u}r die allgemeine Entwicklung der erneuerbaren Energien und um zukunftsweisende Technologien zu identifizieren, ist es notwendig ein energiewirtschaftliches Zieldreieck mit den Auspr{\"a}gungen Rentabilit{\"a}t, Versorgungssicherheit und Nachhaltigkeit in Einklang zu bringen. Die Fachkundigen zeigen auf, dass die politische Triebkraft maßgeblich dar{\"u}ber entscheidet, welche Technologien in Zukunft dominieren werden. Zuk{\"u}nftig wird es verst{\"a}rkt zum Zusammenspiel einzelner Energiequellen in regional diversifizierten Konzepten, sowie zur Elektrifizierung und Sektorenkopplung kommen. Speichertechnologien werden verst{\"a}rkt entwickelt und installiert werden. Prosuming und Demand-Side Response werden von den befragten Fachkundigen zuk{\"u}nftig als bedeutend erachtet. In Bezug auf die einzelnen Energiequellen werden Wasserstofftechnologien zuk{\"u}nftig ein erhebliches Ausbaupotenzial aufweisen. Wasserstoff erm{\"o}glicht einen Beitrag zur Dekarbonisierung diverser Sektoren und dient dar{\"u}ber hinaus als Speichermedium fluktuierender Energien. Zus{\"a}tzlich erfolgt eine Progression im Bereich von Wind- und Solarenergie. Dabei gewinnen im Bereich Photovoltaik, Technologien wie Agri- und Floating-PV an verst{\"a}rkt an Bedeutung. Die Windkraftnutzung wird durch den Bau h{\"o}herer T{\"u}rme und die Vergr{\"o}ßerung von Rotorblattdimensionen optimiert. Geothermie spielt in Zukunft eine vielversprechende Rolle bei der Dekarbonisierung des Niedertemperatursektors. Das Ausbaupotenzial von Biomasse ist aufgrund von Fl{\"a}chenkonkurrenz begrenzt, obwohl sich, analog zu Wasserstoff, vielf{\"a}ltige Nutzungsm{\"o}glichkeiten er{\"o}ffnen. Im Bereich der Energiesysteme und -komponenten er{\"o}ffnen sich diverse materialspezifische so wie fertigungstechnische Verbesserungspotenziale. Einige Technologien sind dabei bereits ausgereift, aber Optimierungsbed{\"u}rftig. Technologien wie Elektrolyseure oder W{\"a}rmepumpen hingegen, bed{\"u}rfen der grundlegenden Weiterentwicklung, um einen effizienten Betrieb zu erm{\"o}glichen. Im Bereich der Solarenergie liegen Entwicklungsschwerpunkte in der Verbesserung kombinierter Solar- und Photovoltaikmodule sowie von Tr{\"a}gerstrukturen f{\"u}r Agri-PV und langlebigeren Konzepten f{\"u}r die Schwimmk{\"o}rper bei Floating PV vor. Schließlich zeigt sich auch hinsichtlich der Speichertechnologien ein Entwicklungsbedarf, insbesondere in Bezug auf Wasserstoffdruck- und -fl{\"u}ssigspeicher, Batteriespeicher und Latentw{\"a}rmespeicher. Diese Fortschritte werden entscheidend sein, um eine nachhaltige und effiziente Energiewirtschaft der Zukunft zu gew{\"a}hrleisten.}, subject = {Erneuerbare Energien; Renewable energies; Technologische Nachhaltigkeitstrends; Sustainability trends; Energy systems; Erneuerbare Energien; Forschung; Technischer Fortschritt; Energiewende; Energiepolitik}, language = {de} } @misc{OPUS4-6432, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,18 (13.09.2023)}, doi = {10.26127/BTUOpen-6432}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64321}, year = {2023}, abstract = {1. Erste {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Klimagerechtes Bauen und Betreiben (M. Sc.) vom 11. September 2023 2. Lesefassung: Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Klimagerechtes Bauen und Betreiben (M. Sc.) vom 01. M{\"a}rz 2018 i. d. F. der ersten {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Klimagerechtes Bauen und Betreiben (M. Sc.) vom 11. September 2023}, language = {de} } @article{RichterRachowIsraeletal.2023, author = {Richter, Jana and Rachow, Fabian and Israel, Johannes and Roth, Norbert and Charlafti, Evgenia and G{\"u}nther, Vivien and Flege, Jan Ingo and Mauss, Fabian}, title = {Reaction mechanism development for methane steam reforming on a Ni/Al2O3 catalyst}, doi = {10.3390/catal13050884}, year = {2023}, abstract = {In this work, a reliable kinetic reaction mechanism was revised to accurately reproduce the detailed reaction paths of steam reforming of methane over a Ni/Al2O3 catalyst. A steadystate fixed-bed reactor experiment and a 1D reactor catalyst model were utilized for this task. The distinctive feature of this experiment is the possibility to measure the axially resolved temperature profile of the catalyst bed, which makes the reaction kinetics inside the reactor visible. This allows for understanding the actual influence of the reaction kinetics on the system; while pure gas concentration measurements at the catalytic reactor outlet show near-equilibrium conditions, the inhere presented temperature profile shows that it is insufficient to base a reaction mechanism development on close equilibrium data. The new experimental data allow for achieving much higher quality in the modeling efforts. Additionally, by carefully controlling the available active surface via dilution in the experiment, it was possible to slow down the catalyst conversion rate, which helped during the adjustment of the reaction kinetics. To assess the accuracy of the revised mechanism, a monolith experiment from the literature was simulated. The results show that the fitted reaction mechanism was able to accurately predict the experimental outcomes for various inlet mass flows, temperatures, and steam-to-carbon ratios.}, subject = {1D modeling; Reaction rates; Methane steam reforming; Fixed-bed reactor experiments; Nickel catalyst; 1D-Modellierung; Reaktionsgeschwindigkeiten; Methan-Dampfreformierung; Festbettreaktor-Experimente; Nickel-Katalysator; Katalysator; Reaktionsmechanismus; Festbettreaktor; Steamreforming; Reaktionsgeschwindigkeit}, language = {en} } @phdthesis{Werner2023, author = {Werner, Jana}, title = {»Wenn ich manchmal so sprachlos bin« : Pflegelehrende und ihr Umgang mit Diskriminierungsph{\"a}nomenen : eine professionstheoretische Perspektive}, doi = {10.26127/BTUOpen-6483}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64835}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Diskriminierungsph{\"a}nomene, ihre Formen, Spezifika und Auftretensh{\"a}ufigkeiten sind f{\"u}r die Pflegeausbildung in Deutschland bisher noch nicht untersucht worden. Lehrkr{\"a}fte in der Pflegeausbildung werden jedoch vermehrt mit Diskriminierungsereignissen konfrontiert, in denen Lernende Abwertung, Ausgrenzung und Benachteiligung erfahren. Lehrkr{\"a}ften in den gesundheitsbildenden Berufen obliegt der Auftrag, ein professionelles, ethisch fundiertes Pflegeverst{\"a}ndnis bei Lernenden in der Pflegeausbildung zu entwickeln. Der Respekt vor der W{\"u}rde des Menschen, die mit einem Diskriminierungsverbot einhergeht, ist dabei die zentrale ethische Pr{\"a}misse bei der Aus{\"u}bung des Pflegeberufes. Die Rolle von Lehrenden und ihre Haltung im Umgang mit diskriminierenden Praktiken von Lernenden sind bisher empirisch nicht untersucht worden. Die Zielstellung dieser empirisch qualitativen Studie mit Hilfe der Methodologie der (Reflexiven) Grounded Theory (nach Breuer et al., 2018; Strauss \& Corbin, 1996) bestand daher: Die Erfahrungen von Lehrenden mit Diskriminierungsereignissen, ihre Umgangsweisen und die damit verbundenen Haltungen und Wissensbest{\"a}nde zu untersuchen. Die empirischen Daten wurden durch elf problemzentrierte Interviews (Witzel, 2000) erfasst und unter Verwendung des Kodierparadigmas (Strauss \& Corbin, 1996) zu einem erkl{\"a}renden Modell zusammengef{\"u}hrt. Im Mittelpunkt der Theorie stehen Diskriminierungsph{\"a}nomene, die h{\"a}ufig als Rassismus, Antisemitismus, Klassismus, Lookismus, Linguizismus und als Gleich- und Ungleichbehandlung auftreten. Sie sind dabei teilweise intersektional verschr{\"a}nkt. Im Modell werden diese Diskriminierungsverh{\"a}ltnisse und ihre Ausdrucksformen {\"u}ber ein Kontinuum von kristalliner, latenter und amorpher Diskriminierung beschrieben. Abwertungs- und Ausgrenzungsprozesse sowohl durch Lernende als auch Lehrende finden in einem Kontext statt, die Merkmale einer Lehr- und Lernsituation darstellen: Sozialformen des Unterrichts, Themenwahl, Zusammensetzung der Lerngruppe und leitende Unterrichtsprinzipien. Diskriminierungsereignisse stehen daher mit dem Unterricht in einem relevanten Zusammenhang. Der situative Kontext ist als Bezugsrahmen zu verstehen, in denen Lehrende ihre Handlungsm{\"o}glichkeiten anwenden. In diesen Situationen wird der Umgang der Lehrenden mit Diskriminierungsprozessen von individuellen und strukturell-institutionellen Bedingungen beeinflusst, die Handlungsm{\"o}glichkeiten er{\"o}ffnen oder blockieren. Die Bew{\"a}ltigungsmodi waren hierbei abh{\"a}ngig von: den Wissensbest{\"a}nden der Lehrenden, von den institutionellen Faktoren, ihrer Grundhaltung zu den Lernenden und ihrem berufsbiografischen Wissen.}, subject = {Diskriminierung; Pflegeausbildung; Lehrkr{\"a}fte; Lehrerhandeln; P{\"a}dagogische Professionalit{\"a}t; Nursing education; Nursing teachers; Teachers' behavior; Pedagogical professionalism; Diskriminierung; Krankenpflege; Unterricht; Lehrerverhalten; P{\"a}dagogische F{\"u}hrung; Grounded theory; Discrimination}, language = {de} } @misc{OPUS4-6431, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,17 (08.09.2023)}, doi = {10.26127/BTUOpen-6431}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64315}, year = {2023}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Wirtschaftsingenieurwesen vom 06. September 2023}, language = {de} } @misc{OPUS4-6430, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,16 (07.09.2023)}, doi = {10.26127/BTUOpen-6430}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64306}, year = {2023}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den universit{\"a}ren Master-Studiengang Maschinenbau vom 31. August 2023}, language = {de} } @phdthesis{Schweiger2023, author = {Schweiger, Severin Franziskus Georg}, title = {Additive manufacturing on chip}, doi = {10.26127/BTUOpen-6455}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64555}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Recent advances in additive manufacturing offer promising opportunities for the fabrication of structures on existing micro-(opto-acoustic )electro-mechanical systems, i.e., chips. This is of particular significance in research and development due to the adaptability and adaptation speed of additive manufacturing. These advantages provide the ability to individualize the fabrication of structures and to enable the rapid prototyping approach. The combination of additive manufacturing on chip already enables current research, especially in photonic and microfluidic fields. Despite this, additive manufacturing on chip has never been applied to acoustic sensors or micro-positioning chips. Such devices could benefit from the mentioned advantages, especially for the fabrication of beam shaping waveguides, packaging, grating and end effector structures. Additive manufacturing by two-photon polymerization lithography gathers interest in industry and research due to its capabilities for the fabrication of structures with minimum feature sizes beyond the diffraction limit. The objective of this work is the investigation of additive manufacturing on chip by two-photon polymerization lithography at the example of an acoustic sensor and a micro-positioning chip. One of the greatest challenges is posed by the optical, thermodynamic, adhesion and alignment effects, which are introduced to the fabrication process by these complex substrates. Optical and thermodynamic models were established, and simulations were performed, culminating in a compensation method to address these effects, which was verified by parameter studies. The substrate alignment was investigated via optical technique, resulting in the development, manufacturing and verification of a novel alignment upgrade to the fabrication system employed in this work. The influence of process materials posed another challenge, as they led to chip performance alterations and restrictions. Chips treated with these materials were characterized, e.g., using high frequency optical microphones. Owing to the high precision of the alignment upgrade and the compensation method developed in this work, additive manufacturing on chip using two-photon polymerization lithography on the investigated devices was reported for the first time and presented for expedient examples, e.g., waveguides, end effectors and gratings. The residue contamination was determined as the main origin of the exhibited performance issues. Development strategies were recommended for further research, to enable additive manufacturing on chip insensitive to residual materials. In this work, the requirements for additive manufacturing on chip were illustrated and the fundamental arrangement to enable the rapid prototyping approach as well as design individualization were demonstrated. The compensation methods developed in this work facilitate upcoming research on desirable chip types that form the basis for optical and microfluidic applications.}, subject = {Additive manufacturing; Microelectromechanical systems; Two-photon polymerization; Capacitive micromachined ultrasonic transducer; Nanoscopic electrostatic drive; Additive Fertigung; Zwei-Photonen Lithographie; Akustische Wellenleiter; Mikronadeln; Mikrofluidik; Additive Fertigung; Mikrofluidik; MEMS; Rapid Prototyping; Microfluidics; Microelectromechanical systems}, language = {en} } @misc{OPUS4-6428, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,14 (05.09.2023)}, doi = {10.26127/BTUOpen-6428}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64283}, year = {2023}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Mathematik vom 29. August 2023}, language = {de} } @misc{OPUS4-6429, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,15 (05.09.2023)}, doi = {10.26127/BTUOpen-6429}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64290}, year = {2023}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Wirtschaftsmathematik vom 29. August 2023}, language = {de} } @misc{OPUS4-6427, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,13 (05.09.2023)}, doi = {10.26127/BTUOpen-6427}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64275}, year = {2023}, abstract = {Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Leichtbau und Werkstofftechnologie vom 28. August 2023}, language = {de} } @phdthesis{Li2023, author = {Li, Yang}, title = {Implementation of a network cluster model for large-scale renewable power estimation and effective energy utilization}, doi = {10.26127/BTUOpen-6456}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64562}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {With the large-scale expansion of decentralized power generation from renewable energy resources (RES) and reduction of fossil fuel-based power generation, this leads to fundamental structural changes in the power supply system. The transition is characterized by a shift from central to decentral, from directional to bi-directional. As the share of renewable power systems in the electricity grid increases, the inherent uncertainty of renewable energies poses challenges to the grid system's stability. To achieve increased efficiency, decarbonisation, decentralization, and digitisation in energy sector, a flexible and resilient energy system is required. Electrical energy data and non-electrical energy data are generated from various sources, including the supervisory control and data acquisition system (SCADA), geographic information system (GIS), and weather information system. Based on these data, different spatial and temporal models of energy systems and their databases are created and connected. This thesis contributes to the analysis of regional power performance. To this end, an efficient simplified grid-oriented network cluster is presented to account for the regional allocation of RES power systems. The model clustering includes the grid topology, temporal and spatial resolution, and the structure of electrical and non-electrical data. This approach contributes to methodological aspects of energy system modelling and analysis. In addition, based on the proposed cluster model, this thesis presents the physical profile-based and data-driven methods to estimate the regional large-scale photovoltaic (PV) and wind power generations. In order to adapt to the spatial-temporal heterogeneity of the regional renewable power generations and to improve the local power utilization rate, this thesis conducts empirical analyses of the regional energy storage and combined PV and wind power systems using cable pooling with shared grid connection. In summary, this thesis presents a flexible modelling approach that takes into account the regional allocation of renewable power systems and enables a more accurate estimation of regional power generation. The proposed model and analytical methods can help the efficiency and resiliency of the energy system and support the transition towards renewable energies.}, subject = {Decentralized power generation; Energy system modelling and analysis; Regional power generation; Grid-oriented network cluster; Regional energy storage; Dezentrale Stromerzeugung; Erneuerbare Energien; Elektrisches Energiesystem; Elektrizit{\"a}tsversorgungsnetz; Dezentrale Energieversorgung; Dezentrale Elektrizit{\"a}tserzeugung; Energiesystemmodellierung und -analyse; Regionale Stromerzeugung; Netzorientiertes Netzcluster; Regionale Energiespeicherung}, language = {en} } @misc{OPUS4-6426, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,12 (01.09.2023)}, doi = {10.26127/BTUOpen-6426}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64269}, year = {2023}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Stadt- und Regionalplanung vom 24. August 2023}, language = {de} } @misc{OPUS4-6425, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,11 (01.09.2023)}, doi = {10.26127/BTUOpen-6425}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64258}, year = {2023}, abstract = {Neufassung der fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Bachelor-Studiengang Stadtplanung und St{\"a}dtebau vom 24. August 2023}, language = {de} } @article{Zeissig2023, author = {Zeißig, Anke}, title = {Boredom as the originator of a desideratum : reflections on the creative and suppressive consequences of boredom in the school context}, doi = {10.3389/fsoc.2023.1214069}, year = {2023}, abstract = {Bored children begin to draw, do crafts, to fidget - or they do something bad. Others fall silent, withdraw, or become lethargic. Research on school-related boredom has focused primarily on the negative consequences of boredom, such as decreased cognitive performance, motivation or attentativeness, or disruptiveness. These negative aspects of boredom can be contrasted by the notion that boredom can promote creative performance. This paper reflects on boredom's creative and suppressive consequences as an interplay of personality traits and behavioral possibilities in school situations, on the one hand, and as an interplay of situational experiences with constituent developmental processes on the other. It is proposed that boredom is a gauge of the learner's resonance with school content, learning and/or developmental relationships. Boredom indicates a psychological need and its desideratum. Thus, both creative and suppressive potentials are inherent in boredom.}, subject = {Boredom; Creativity; Education; School; Langeweile; Kreativit{\"a}t; Bildung; Schule; Spiritualit{\"a}t; Bildung; Kind; Kognitive Entwicklung; Langeweile; Sozialp{\"a}dagogik; Boredom; Education}, language = {en} } @article{MarkovaNenovaEnglerCordetal.2023, author = {Markova-Nenova, Nonka and Engler, Jan O. and Cord, Anna F. and W{\"a}tzold, Frank}, title = {Will passive acoustic monitoring make result-based payments more attractive? A cost comparison with human observation for farmland bird monitoring}, doi = {10.1111/csp2.13003}, year = {2023}, abstract = {Result-based payments (RBPs) reward land users for conservation outcomes and are a promising alternative to standard payments, which are targeted at specific land use measures. A major barrier to the implementation of RBPs, particularly for the conservation of mobile species, is the substantial monitoring cost. Passive acoustic monitoring may offer promising opportunities for low-cost monitoring as an alternative to human observation. We develop a costing framework for comparing human observation and passive acoustic monitoring and apply it to a hypothetical RBP scheme for farmland bird conservation. We consider three different monitoring scenarios: daytime monitoring for the whinchat and the ortolan bunting, nighttime monitoring for the gray partridge and the common quail, and day-and-night monitoring for all four species. We also examine the effect of changes in relevant parameters (such as participating area, travel distance and required monitoring time) on the cost comparison. Our results show that passive acoustic monitoring is still more expensive than human observation for daytime monitoring. In contrast, passive acoustic monitoring has a cost advantage for nighttime as well as day-and-nighttime monitoring in all considered scenarios.}, subject = {Performance-based payments; Monitoring costs; PAM; ARU; AudioMoth; Monitoringkosten; Ergebnishonorierung; Naturschutz; Landwirtschaft; Monitoring; V{\"o}gel; Erfolgshonorar; Kostenvergleich}, language = {en} } @article{AsliKimHoeschler2023, author = {Asli, Majid and Kim, Dongsuk and H{\"o}schler, Klaus}, title = {On the potentials of the integration of pressure gain combustion with a hybrid electric propulsion system}, doi = {10.3390/aerospace10080710}, year = {2023}, abstract = {As the issue of pollutant emissions from aviation propulsion escalates, research into alternative powertrains is gaining momentum. Two promising technologies are the Hybrid Electric Propulsion System (HEPS) and Pressure Gain Combustion (PGC). HEPS is expected to reduce pollutant emissions by decreasing fuel consumption, whereas PGC uses detonation in the combustor to increase the thermal efficiency of engines by elevating the total pressure during combustion. This study extensively explores the integration of these two emerging technologies, thoroughly assessing the advantages that arise from their combination. First, the renowned turboprop engine PW127 is benchmarked and modeled using Gasturb software. The model is integrated into Simulink using the T-MATS tool, with HEPS and pressure gain components added to analyze the thermodynamics of various configurations under different pressure gain values and HEPS parameters. The analysis, conducted up to the cruise phase of the baseline aircraft, reveals that applying pressure gain combustion through Rotating Detonation Combustion (RDC) results in a more significant increase in efficiency and decrease in fuel consumption compared to HEPS with conventional gas turbines. However, HEPS helps maintain a more uniform combustor inlet condition and reduces the Turbine Inlet Temperature (TIT) at the takeoff phase, where the highest TIT otherwise occurs. The results suggest that integrating HEPS with PGC can be beneficial in maintaining optimal combustor conditions and mitigating turbine efficiency degradation.}, subject = {Pressure gain combustion; Hybrid electric propulsion; Rotating detonation combustion; Druckverst{\"a}rkungsverbrennung; Rotierende Detonationsverbrennung; Hybrid-Elektroantrieb; Propeller-Turbinen-Luftstrahltriebwerk; Hybridantrieb; Verbrennung; Schadstoffemission; Emissionsverringerung}, language = {en} } @article{AliKhanKolendaetal.2023, author = {Ali, Aamir and Khan, Muhammad Moman and Kolenda, Rafal and Olowe, Olugbenga Adekunie and Weinreich, J{\"o}rg and Li, Ganwu and Schierack, Peter}, title = {The role of AJB35136 and fdtA genes in biofilm formation by avian pathogenic Escherichia coli}, doi = {10.1186/s12917-023-03672-7}, year = {2023}, abstract = {Background Infections caused by avian pathogenic Escherichia coli (APEC) result in significant economic losses in poultry industry. APEC strains are known to form biofilms in various conditions allowing them to thrive even under harsh and nutrient-deficient conditions on different surfaces, and this ability enables them to evade chemical and biological eradication methods. Despite knowing the whole genome sequences of various APEC isolates, little has been reported regarding their biofilm-associated genes. A random transposon mutant library of the wild-type APEC IMT 5155 comprising 1,300 mutants was analyzed for biofilm formation under nutrient deprived conditions using Videoscan technology coupled with fluorescence microscopy. Seven transposon mutants were found to have reproducibly and significantly altered biofilm formation and their mutated genes were identified by arbitrary PCR and DNA sequencing. The intact genes were acquired from the wild-type strain, cloned in pACYC177 plasmid and transformed into the respective altered biofilm forming transposon mutants, and the biofilm formation was checked in comparison to the wild type and mutant strains under the same conditions. Results In this study, we report seven genes i.e., nhaA, fdeC, yjhB, lysU, ecpR, AJB35136 and fdtA of APEC with significant contribution to biofilm formation. Reintroduction of AJB35136 and fdtA, reversed the altered phenotype proving that a significant role being played by these two O-antigen related genes in APEC biofilm formation. Presence of these seven genes across nonpathogenic E. coli and APEC genomes was also analyzed showing that they are more prevalent in the latter.}, subject = {APEC; Biofilm; Gene; Complementation; Transposon mutant; VideoScan; Genkomplementierung; Transposon-Mutanten; Gefl{\"u}gelkrankheit; Escherichia coli; Biofilm; Komplementation; Transponson; Mutant}, language = {en} } @misc{OPUS4-6354, title = {Amtliches Mitteilungsblatt der BTU Cottbus-Senftenberg, 2023,10 (31.08.2023)}, doi = {10.26127/BTUOpen-6354}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-63545}, year = {2023}, abstract = {1. Erste {\"A}nderungssatzung zur Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Wirtschaftsingenieurwesen (M. Eng.) mit fachhochschulischem Studienprofil vom 24. August 2023 2. Lesefassung: Fachspezifische Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Wirtschaftsingenieurwesen (M. Eng.) mit fachhochschulischem Studienprofil vom 22. Oktober 2018 i. d .F. der Ersten {\"A}nderungssatzung zur Fachspezifischen Pr{\"u}fungs- und Studienordnung f{\"u}r den Master-Studiengang Wirtschaftsingenieurwesen (M. Eng.) mit fachhochschulischem Studienprofil vom 24. August 2023}, language = {de} } @phdthesis{Sparr2023, author = {Sparr, Holger}, title = {Thermomechanische Analyse von inelastischen Deformationsvorg{\"a}ngen bei komplexer Beanspruchung in Modellierung und Experiment}, doi = {10.26127/BTUOpen-6419}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64197}, school = {BTU Cottbus - Senftenberg}, year = {2023}, abstract = {Anwendbare Materialgesetze im Rahmen der ph{\"a}nomenologischen Kontinuumsmechanik sind durch die ber{\"u}cksichtigten Deformationsmechanismen gepr{\"a}gt und sind in der Regel f{\"u}r einen anzugebenden G{\"u}ltigkeitsbereich einsatzf{\"a}hig. Die verwendeten mathematischen Werkzeuge geben einen ausreichenden Anpassungsspielraum experimenteller Daten, beziehen jedoch die Physikalit{\"a}t des Materialgesetzes bedingt ein, da der thermodynamische Prozess der Deformation als n{\"a}herungsweise isotherm behandelt wird. In dieser Arbeit wird der Deformationsvorgang unter mechanischer Last als vollst{\"a}ndiger thermodynamischer Prozess verstanden, der eine Temperaturentwicklung im Werkstoff einbezieht und die kalorischen Zustandsgr{\"o}ßen auswertet. Die Konzepte der Kontinuumsthermomechanik werden in der Beschreibung f{\"u}r thermodynamisch konsistente Materialgesetze genutzt. Die zugeh{\"o}rigen, mikrostrukturell motivierten Entwicklungsgr{\"o}ßen beschreiben das nichtlineare Verhalten f{\"u}r eine große Bandbreite von Materialklassen und in komplexen Belastungspfaden. Um dies f{\"u}r die Ermittlung geeigneter Materialgesetze nutzbar zu machen wird die Infrarotthermografie f{\"u}r die Ermittlung der Oberfl{\"a}chentemperatur in den Messablauf integriert. Hauptaugenmerk liegt auf dem technisch relevanten Anwendungsbereich der kleinen Deformationsgradienten bei Raumtemperatur. Anhand charakteristischer Belastungspfade f{\"u}r metallische Konstruktionswerkstoffe wird gezeigt, dass die Dynamik der Deformationsmechanismen sich in der Spannungs-Dehnungs-Charakteristik, in der Temperaturentwicklung und bei den kalorischen Zustandsgr{\"o}ßen signifikant widerspiegeln. Dies trifft insbesondere auch dann zu, wenn die Versuchsanforderungen minimiert werden und die gemessenen Temperatur{\"a}nderungen klein sind. Die Ergebnisse der Arbeit weisen mit der Erweiterung des ver{\"a}nderlichen Temperaturfeldes einen Zugewinn in der Physikalit{\"a}t der thermodynamisch konsistenten Materialgesetze nach.}, subject = {Thermomechanik; Infrarotthermografie; Viskoplastizit{\"a}t; Eigenerw{\"a}rmung; Thermomechanics; Infrared Thermography; Viscoplasticity; Self-heating; Thermomechanik; Eigenerw{\"a}rmung; Viskoplastizit{\"a}t; Infrarotthermographie}, language = {de} } @misc{Vogel2018, type = {Master Thesis}, author = {Vogel, Elisabeth}, title = {Analyse von EM-Kartographie als Mittel zur Bestimmung von Leakage-Quellen sowie des Effektes geeigneter Gegenmaßnahmen}, doi = {10.26127/BTUOpen-6454}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64545}, school = {BTU Cottbus - Senftenberg}, year = {2018}, abstract = {The Internet of Things (IoT) and Wireless Sensor Networks (WSNs) are essential for today's global information society, relying on small wireless devices for networking. When these devices' functionalities or data are manipulated, the potential damage is significant. Hence, securing data transmission between these devices using cryptography is crucial. However, the security of cryptographic algorithms depends on the secrecy of cryptographic keys, which can be vulnerable due to physical accessibility. Side-channel analysis attacks can exploit this vulnerability by using physical parameters associated with the operation of cryptographic chips, such as electromagnetic radiation during cryptographic operations. In response to this challenge, the Leakage Source Cartography Tool (LSC-Tool) was developed in this thesis to expedite the analysis of electromagnetic radiation in IHP's elliptic curve cryptography designs. The LSC-Tool enables automated evaluation of sets of electromagnetic traces, obtained from different measurement positions across a cryptographic chip. The analysis results in a leakage source map (LS-map) that displays the success of electromagnetic analysis attacks at each measurement point. This tool offers a cost-effective and rapid means to assess the resistance of cryptographic designs against attacks, providing designers with insights into the most vulnerable areas of the chip and information about leakage per clock cycle. By applying the LSC-Tool, the resistance of two IHP ECC designs against horizontal differential electromagnetic analysis attacks was tested across 25 measurement positions. The statistical analysis of traces can be conducted using three methods: the least squares method, the difference-of-means-test, or the difference-of-the-mean method. The generated LS-maps show that using different methods yields distinct leakage source indications. Combining these maps enhances the attack's success rate. Notably, during this research, it became evident that the LSC-Tool could be adapted to create LS-maps for the functional blocks of ECC designs, enabling the analysis of simulated power traces for IHP ECC designs.}, subject = {EM-Kartographie; Elliptische Kurven; Power Analysis Angriffe; Seitenkanalattacke; Fehleranalyse; Kryptosystem; Elektromagnetische Strahlung; Elliptische Kurve; Side-channel-analysis; Countermeasures; Power analysis}, language = {de} } @techreport{OPUS4-6462, title = {Akteursanalyse Strukturwandelregion Lausitz}, editor = {Weidner, Silke and Ribbeck-Lampel, Juliane}, issn = {2702-6892}, doi = {10.26127/BTUOpen-6462}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-64624}, year = {2023}, abstract = {Die vorliegende Publikation pr{\"a}sentiert Ergebnisse von 55 Studierenden des Bachelorstudiengangs St{\"a}dtebau und Stadtplanung aus dem Modul „Stadtmanagement 1, Vermittlung von Planung, Wohnungswirtschaft (SPB3)", das im Wintersemester 2022/2023 am Fachgebiet Stadtmanagement der BTU Cottbus-Senftenberg stattgefunden hat.}, subject = {Analyse; Akteure; Interview; Lausitz; Strukturwandel; Actors; Analysis; Lusatia; Structural change; Lausitz; Strukturwandel; Sozialer Wandel; Akteur; Analyse; Interview}, language = {de} } @article{BahnsKopkow2023, author = {Bahns, Carolin and Kopkow, Christian}, title = {Physiotherapy for patients with hip and knee osteoarthritis in Germany: a survey of current practice}, doi = {10.1186/s12891-023-06464-0}, year = {2023}, abstract = {Osteoarthritis (OA) of the hip and the knee is common and leads to pain, stiffness and disability. Clinical practice guidelines (CPG) provide recommendations to assist healthcare professionals in clinical decision-making. Although evidence-based physiotherapy has been shown to be effective in the management OA, a gap between clinical practice and guideline recommendations exists. Little is known about OA management provided by physiotherapists in Germany and whether treatment aligns with CPGs. The objectives of this study were (1) to investigate the current physiotherapy practice in patients with hip and/or knee OA in Germany, (2) to evaluate physiotherapists' adherence to guideline recommendations and (3) to explore barriers and facilitators to guideline use.}, subject = {Osteoarthrosis; Knee; Hip; Physical therapy; Arthrose; H{\"u}ftgelenk; Knie; Osteoarthrose; Physikalische Therapie; Arthrose; Knie; H{\"u}fte; Physiotherapie}, language = {en} } @article{HanReiterSchlipfetal.2023, author = {Han, Weijia and Reiter, Sebastian and Schlipf, Jon and Mai, Christian and Spirito, Davide and Jose, Josmy and Wenger, Christian and Fischer, Inga A.}, title = {Strongly enhanced sensitivities of CMOS compatible plasmonic titanium nitride nanohole arrays for refractive index sensing under oblique incidence}, doi = {10.1364/OE.481993}, year = {2023}, abstract = {Titanium nitride (TiN) is a complementary metal-oxide-semiconductor (CMOS) compatible material with large potential for the fabrication of plasmonic structures suited for device integration. However, the comparatively large optical losses can be detrimental for application. This work reports a CMOS compatible TiN nanohole array (NHA) on top of a multilayer stack for potential use in integrated refractive index sensing with high sensitivities at wavelengths between 800 and 1500 nm. The stack, consisting of the TiN NHA on a silicon dioxide (SiO2) layer with Si as substrate (TiN NHA/SiO2/Si), is prepared using an industrial CMOS compatible process. The TiN NHA/SiO2/Si shows Fano resonances in reflectance spectra under oblique excitation, which are well reproduced by simulation using both finite difference time domain (FDTD) and rigorous coupled-wave analysis (RCWA) methods. The sensitivities derived from spectroscopic characterizations increase with the increasing incident angle and match well with the simulated sensitivities. Our systematic simulation-based investigation of the sensitivity of the TiN NHA/SiO2/Si stack under varied conditions reveals that very large sensitivities up to 2305 nm per refractive index unit (nm RIU-1) are predicted when the refractive index of superstrate is similar to that of the SiO2 layer. We analyze in detail how the interplay between plasmonic and photonic resonances such as surface plasmon polaritons (SPPs), localized surface plasmon resonances (LSPRs), Rayleigh Anomalies (RAs), and photonic microcavity modes (Fabry-P{\´e}rot resonances) contributes to this result. This work not only reveals the tunability of TiN nanostructures for plasmonic applications but also paves the way to explore efficient devices for sensing in broad conditions.}, subject = {TiN; Plasmonics; Plasmonik; Plasmonik; Photonik; Titannitrid; Plasmonics; Photonics}, language = {en} }