@phdthesis{Dommes2023,
  author    = {Dommes, Bianca},
  title     = {»… und am Himmel standen die Sterne, aber wir sahen sie nicht«},
  series = {Potsdamer J{\"u}dische Studien},
  volume    = {10},
  journal   = {Potsdamer J{\"u}dische Studien},
  publisher = {be.bra wissenschaft},
  address   = {Berlin},
  isbn      = {978-3-95410-316-4},
  school      = {Universit{\"a}t Potsdam},
  pages     = {448},
  year      = {2023},
  language  = {de}
}
@phdthesis{RuoffnerUnterrainer2023,
  author    = {Ruoffner-Unterrainer, Simone},
  title     = {Zwischen Verein, Korporation und Gesinnungsgemeinschaft},
  series = {Abhandlungen zum Studenten- und Hochschulwesen},
  volume    = {22},
  journal   = {Abhandlungen zum Studenten- und Hochschulwesen},
  publisher = {B{\"o}hlau},
  address   = {Wien ; K{\"o}ln},
  isbn      = {978-3-412-52837-9},
  school      = {Universit{\"a}t Potsdam},
  pages     = {455},
  year      = {2023},
  language  = {de}
}
@phdthesis{Ellenbeck2023,
  author    = {Ellenbeck, Saskia},
  title     = {Zwischen Modellierung und Stakeholderbeteiligung - Wissensproduktion in der Energiewendeforschung},
  school      = {Universit{\"a}t Potsdam},
  pages     = {130},
  year      = {2023},
  abstract  = {Die Dekarbonisierung des Energiesystems ist Teil der international im Rahmen des Pariser Klimaabkommens beschlossenen CO2-Minderungsstrategie zur Bek{\"a}mpfung des Klimawandels. Nach den Verhandlungen und Beschl{\"u}ssen der Klimaziele stehen politische Entscheider weltweit nun vor der Frage, wie sie diese erreichen k{\"o}nnen. Dies produziert eine hohe politische Nachfrage nach Wissen um die direkten und indirekten Effekte verschiedener Instrumente und potentiellen Entwicklungspfade einer Energiewende. Dieser gesellschaftliche Bedarf an wissenschaftlichen Antworten zu L{\"o}sungsoptionen wurde im Rahmen einer Klimafolgenforschung, genauer einer Klimapolitikfolgenforschung, aufgenommen. Der relativ neue Zweig einer Energiewendeforschung hat sich weltweit entwickelt, steht dabei allerdings vor der doppelten Herausforderung: Erstens befindet sich das Objekt der Forschung nicht im luftleeren Raum, sondern innerhalb {\"o}konomischer, sozialer und politischer Zusammenh{\"a}nge, hier gesellschaftliche Einbettung genannt. Denn die Frage, wie die Energiewende erreicht werden kann, wird auch außerhalb der Wissenschaft debattiert und stellt damit ein Aushandlungsfeld unterschiedlicher Interessen und Narrative dar. Zweitens befindet sich das zu untersuchende Objekt in der Zukunft, hier unter dem Terminus des strukturellen Nicht-Wissens zusammengefasst. Diese beiden Bedingungen f{\"u}hren dazu, dass konventionelle Methoden der empirischen Sozialforschung nicht greifen und eine {\"O}ffnung und Transformation der Wissenschaft in Hinblick auf neue Methoden vonn{\"o}ten ist (Nowotny 2001, Ravetz 2006, Schneidewind 2013). In dieser Arbeit untersuche ich zwei M{\"o}glichkeiten, wie mit der Herausforderung, Wissen unter der Bedingung des strukturellen Nicht-Wissens und der gesellschaftlichen Einbettung zu produzieren, in der Energiewendeforschung umgegangen wird. Einerseits wird dies durch die Einbeziehung von Stakeholdern, also nicht-wissenschaftlicher Akteure, in den Forschungsprozess getan. Andererseits ist die Nutzung von komplexen {\"o}konometrischen Modellen zur Berechnung von Implikationen und energiewirtschaftlichen Entwicklungspfaden zu einem zentralen Mittel der Wissensgenerierung in der Energiewendeforschung avanciert. Damit wird der als Problem verstandenen strukturellen Bedingung des Nicht-Wissens insofern begegnet, als dass die Ergebnisse von Stakeholder-Involvement und von Modellierungsarbeiten zweifelsohne neues Wissen zur Verf{\"u}gung stellen. Uneinigkeit besteht jedoch darin, wor{\"u}ber dieses Wissen etwas aussagt: Sind es Interessen oder legitime Perspektiven, die Stakeholder in den Forschungsprozess einbringen und sind Modelle vereinfachte Darstellungen der Welt oder sind sie Ausdruck der Vorstellung des Modellierers?},
  language  = {de}
}
@phdthesis{Knollmueller2023,
  author    = {Knollm{\"u}ller, Robert},
  title     = {Zum Zusammenhang von Jahresnoten und Kompetenzen in der Neuen Mittelschule},
  doi       = {10.25932/publishup-59151},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-591514},
  school      = {Universit{\"a}t Potsdam},
  pages     = {359},
  year      = {2023},
  abstract  = {Die vorliegende Studie besch{\"a}ftigt sich mit dem nach einer Strukturver{\"a}nderung in der Sekundarstufe I entstandenen Schulmodell der Neuen Mittelschule. Untersucht wird, ob sich durch dieses Schulmodell und der damit intendierten neuen Lehr-, Lern- und Pr{\"u}fungskultur Zusammenh{\"a}nge zwischen gemessenen mathematischen Kompetenzen der Sch{\"u}ler und den durch Lehrer vergebenen Jahresnoten feststellen lassen. Die Literaturrecherche macht deutlich, dass die Kritik an der Monokultur des leh-rerzentrierten Unterrichts zwar zu einer neuen Lehr-, Lern- und Pr{\"u}fungskultur f{\"u}hrt, deren Inhalte sind aber recht unterschiedlich, komplex und nicht eindeutig definiert. In der NMS soll die Leistungsbewertung als Lernhilfe fungieren, aber auch verl{\"a}ssliche Aussagen {\"u}ber die Leistung der Sch{\"u}ler treffen. Zur Wirkung der neuen Lernkultur in der NMS gibt es ebenso keine empirischen Befunde wie {\"u}ber die Wirkung der Leistungsbewertung. An der empirischen Untersuchung nehmen 79 Sch{\"u}ler der sechsten Schulstufe aus drei Neuen Mittelschulen (dicht besiedelte, mittel besiedelte, d{\"u}nn besiedelte Gemeinde) in Nieder{\"o}sterreich teil. In jeder Schule werden zwei Klassen untersucht. Dabei werden der Kompetenzstand in Mathematik, Sch{\"u}lerzentriertheit sowie Sozial- und Leistungsdruck aus Sicht der Sch{\"u}ler gemeinsam mit der Jah-resnote erhoben. F{\"u}r die Studie wird ein Pfadmodell entwickelt und mit einer Pfadanalyse ausge-wertet. Dabei zeigen sich zwar Zusammenh{\"a}nge zwischen den gemessenen Kompetenzen in Mathematik und den Jahresnoten. Diese Jahresnoten besitzen {\"u}ber die Klasse bzw. die Schule hinaus aber nur eine bedingte Aussagekraft {\"u}ber die erbrachten Leistungen.},
  language  = {de}
}
@phdthesis{Kiemel2023,
  author    = {Kiemel, Katrin},
  title     = {Zooplankton adaptations and community dynamics in space and time},
  school      = {Universit{\"a}t Potsdam},
  year      = {2023},
  abstract  = {In times of ongoing biodiversity loss, understanding how communities are structured and what mechanisms and local adaptations underlie the patterns we observe in nature is crucial for predicting how future ecological and anthropogenic changes might affect local and regional biodiversity. Aquatic zooplankton are a group of primary consumers that represent a critical link in the food chain, providing nutrients for the entire food web. Thus, understanding the adaptability and structure of zooplankton communities is essential. In this work, the genetic basis for the different temperature adaptations of two seasonally shifted (i.e., temperature-dependent) occurring freshwater rotifers of a formerly cryptic species complex (Brachionus calyciflorus) was investigated to understand the overall genetic diversity and evolutionary scenario for putative adaptations to different temperature regimes. Furthermore, this work aimed to clarify to what extent the different temperature adaptations may represent a niche partitioning process thus enabling co-existence. The findings were then embedded in a metacommunity context to understand how zooplankton communities assemble in a kettle hole metacommunity located in the northeastern German "Uckermark" and which underlying processes contribute to the biodiversity patterns we observe. Using a combined approach of newly generated mitochondrial resources (genomes/cds) and the analysis of a candidate gene (Heat Shock Protein 40kDa) for temperature adaptation, I showed that the global representatives of B. calyciflorus s.s.. are genetically more similar than B. fernandoi (average pairwise nucleotide diversity: 0.079 intraspecific vs. 0.257 interspecific) indicating that both species carry different standing genetic variation. In addition to differential expression in the thermotolerant B. calyciflorus s.s. and thermosensitive B. fernandoi, the HSP 40kDa also showed structural variation with eleven fixed and six positively selected sites, some of which are located in functional areas of the protein. The estimated divergence time of ~ 25-29 Myr combined with the fixed sites and a prevalence of ancestral amino acids in B. calyciflorus s.s. indicate that B. calyciflorus s.s. remained in the ancestral niche, while B. fernandoi partitioned into a new niche. The comparison of mitochondrial and nuclear markers (HPS 40kDa, ITS1, COI) revealed a hybridisation event between the two species. However, as hybridisation between the two species is rare, it can be concluded that the temporally isolated niches (i.e., seasonal-shifted occurrence) they inhabit based on their different temperature preferences most likely represent a pre-zygotic isolation mechanism that allows sympatric occurrence while maintaining species boundaries. To determine the processes underlying zooplankton community assembly, a zooplankton metacommunity comprising 24 kettle holes was sampled over a two-year period. Active (i.e., water samples) and dormant communities (i.e., dormant eggs hatched from sediment) were identified using a two-fragment DNA metabarcoding approach (COI and 18S). Species richness and diversity as well as community composition were analysed considering spatial, temporal and environmental parameters. The analysis revealed that environmental filtering based on parameters such as pH, size and location of the habitat patch (i.e., kettle hole) and surrounding field crops largely determined zooplankton community composition (explained variance: Bray-Curtis dissimilarities: 10.5\%; Jaccard dissimilarities: 12.9\%), indicating that adaptation to a particular habitat is a key feature of zooplankton species in this system. While the spatial configuration of the kettle holes played a minor role (explained variance: Bray-Curtis dissimilarities: 2.8\% and Jaccard dissimilarities: 5.5\%), the individual kettle hole sites had a significant influence on the community composition. This suggests monopolisation/priority effects (i.e., dormant communities) of certain species in individual kettle holes. As environmental filtering is the dominating process structuring zooplankton communities, this system could be significantly influenced by future land-use change, pollution and climate change.},
  language  = {en}
}
@phdthesis{Herbst2023,
  author    = {Herbst, Dominika},
  title     = {Zeugenschaft in Wort und Bild},
  series = {Opera Slavica. Neue Folge ; 69},
  journal   = {Opera Slavica. Neue Folge ; 69},
  publisher = {Harrassowitz},
  address   = {Wiesbaden},
  isbn      = {978-3-447-12027-2},
  pages     = {X, 222},
  year      = {2023},
  language  = {de}
}
@phdthesis{Afifi2023,
  author    = {Afifi, Haitham},
  title     = {Wireless In-Network Processing for Multimedia Applications},
  doi       = {10.25932/publishup-60437},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-604371},
  school      = {Universit{\"a}t Potsdam},
  pages     = {xiii, 233},
  year      = {2023},
  abstract  = {With the recent growth of sensors, cloud computing handles the data processing of many applications. Processing some of this data on the cloud raises, however, many concerns regarding, e.g., privacy, latency, or single points of failure. Alternatively, thanks to the development of embedded systems, smart wireless devices can share their computation capacity, creating a local wireless cloud for in-network processing. In this context, the processing of an application is divided into smaller jobs so that a device can run one or more jobs. The contribution of this thesis to this scenario is divided into three parts. In part one, I focus on wireless aspects, such as power control and interference management, for deciding which jobs to run on which node and how to route data between nodes. Hence, I formulate optimization problems and develop heuristic and meta-heuristic algorithms to allocate wireless and computation resources. Additionally, to deal with multiple applications competing for these resources, I develop a reinforcement learning (RL) admission controller to decide which application should be admitted. Next, I look into acoustic applications to improve wireless throughput by using microphone clock synchronization to synchronize wireless transmissions. In the second part, I jointly work with colleagues from the acoustic processing field to optimize both network and application (i.e., acoustic) qualities. My contribution focuses on the network part, where I study the relation between acoustic and network qualities when selecting a subset of microphones for collecting audio data or selecting a subset of optional jobs for processing these data; too many microphones or too many jobs can lessen quality by unnecessary delays. Hence, I develop RL solutions to select the subset of microphones under network constraints when the speaker is moving while still providing good acoustic quality. Furthermore, I show that autonomous vehicles carrying microphones improve the acoustic qualities of different applications. Accordingly, I develop RL solutions (single and multi-agent ones) for controlling these vehicles. In the third part, I close the gap between theory and practice. I describe the features of my open-source framework used as a proof of concept for wireless in-network processing. Next, I demonstrate how to run some algorithms developed by colleagues from acoustic processing using my framework. I also use the framework for studying in-network delays (wireless and processing) using different distributions of jobs and network topologies.},
  language  = {en}
}
@phdthesis{Verch2023,
  author    = {Verch, Ronald},
  title     = {Whole-body electrical muscle stimulation superimposed walking as training tool in the management of type 2 diabetes mellitus},
  doi       = {10.25932/publishup-63424},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-634240},
  school      = {Universit{\"a}t Potsdam},
  pages     = {IX, 78},
  year      = {2023},
  abstract  = {Background: The worldwide prevalence of diabetes has been increasing in recent years, with a projected prevalence of 700 million patients by 2045, leading to economic burdens on societies. Type 2 diabetes mellitus (T2DM), representing more than 95\% of all diabetes cases, is a multifactorial metabolic disorder characterized by insulin resistance leading to an imbalance between insulin requirements and supply. Overweight and obesity are the main risk factors for developing type 2 diabetes mellitus. The lifestyle modification of following a healthy diet and physical activity are the primary successful treatment and prevention methods for type 2 diabetes mellitus. Problems may exist with patients not achieving recommended levels of physical activity. Electrical muscle stimulation (EMS) is an increasingly popular training method and has become in the focus of research in recent years. It involves the external application of an electric field to muscles, which can lead to muscle contraction. Positive effects of EMS training have been found in healthy individuals as well as in various patient groups. New EMS devices offer a wide range of mobile applications for whole-body electrical muscle stimulation (WB-EMS) training, e.g., the intensification of dynamic low-intensity endurance exercises through WB-EMS. This dissertation project aims to investigate whether WB-EMS is suitable for intensifying low-intensive dynamic exercises such as walking and Nordic walking. Methods: Two independent studies were conducted. The first study aimed to investigate the reliability of exercise parameters during the 10-meter Incremental Shuttle Walk Test (10MISWT) using superimposed WB-EMS (research question 1, sub-question a) and the difference in exercise intensity compared to conventional walking (CON-W, research question 1, sub-question b). The second study aimed to compare differences in exercise parameters between superimposed WB-EMS (WB-EMS-W) and conventional walking (CON-W), as well as between superimposed WB-EMS (WB-EMS-NW) and conventional Nordic walking (CON-NW) on a treadmill (research question 2). Both studies took place in participant groups of healthy, moderately active men aged 35-70 years. During all measurements, the Easy Motion Skin® WB-EMS low frequency stimulation device with adjustable intensities for eight muscle groups was used. The current intensity was individually adjusted for each participant at each trial to ensure safety, avoiding pain and muscle cramps. In study 1, thirteen individuals were included for each sub question. A randomized cross-over design with three measurement appointments used was to avoid confounding factors such as delayed onset muscle soreness. The 10MISWT was performed until the participants no longer met the criteria of the test and recording five outcome measures: peak oxygen uptake (VO2peak), relative VO2peak (rel.VO2peak), maximum walk distance (MWD), blood lactate concentration, and the rate of perceived exertion (RPE). Eleven participants were included in study 2. A randomized cross-over design in a study with four measurement appointments was used to avoid confounding factors. A treadmill test protocol at constant velocity (6.5 m/s) was developed to compare exercise intensities. Oxygen uptake (VO2), relative VO2 (rel.VO2) blood lactate, and the RPE were used as outcome variables. Test-retest reliability between measurements was determined using a compilation of absolute and relative measures of reliability. Outcome measures in study 2 were studied using multifactorial analyses of variances. Results: Reliability analysis showed good reliability for VO2peak, rel.VO2peak, MWD and RPE with no statistically significant difference for WB-EMS-W during 10WISWT. However, differences compared to conventional walking in outcome variables were not found. The analysis of the treadmill tests showed significant effects for the factors CON/WB-EMS and W/NW for the outcome variables VO2, rel.VO2 and lactate, with both factors leading to higher results. However, the difference in VO2 and relative VO2 is within the range of biological variability of ± 12\%. The factor combination EMS∗W/NW is statistically non-significant for all three variables. WB-EMS resulted in the higher RPE values, RPE differences for W/NW and EMS∗W/NW were not significant. Discussion: The present project found good reliability for measuring VO2peak, rel. VO2peak, MWD and RPE during 10MISWT during WB-EMS-W, confirming prior research of the test. The test appears technically limited rather than physiologically in healthy, moderately active men. However, it is unsuitable for investigating differences in exercise intensities using WB-EMS-W compared to CON-W due to different perceptions of current intensity between exercise and rest. A treadmill test with constant walking speed was conducted to adjust individual maximum tolerable current intensity for the second part of the project. The treadmill test showed a significant increase in metabolic demands during WB-EMS-W and WB-EMS-NW by an increased VO2 and blood lactate concentration. However, the clinical relevance of these findings remains debatable. The study also found that WB-EMS superimposed exercises are perceived as more strenuous than conventional exercise. While in parts comparable studies lead to higher results for VO2, our results are in line with those of other studies using the same frequency. Due to the minor clinical relevance the use of WB-EMS as exercise intensification tool during walking and Nordic walking is limited. High device cost should be considered. Habituation to WB-EMS could increase current intensity tolerance and VO2 and make it a meaningful method in the treatment of T2DM. Recent figures show that WB-EMS is used in obese people to achieve health and weight goals. The supposed benefit should be further investigated scientifically.},
  language  = {en}
}
@phdthesis{FortesMartin2023,
  author    = {Fortes Mart{\´i}n, Rebeca},
  title     = {Water-in-oil microemulsions as soft-templates to mediate nanoparticle interfacial assembly into hybrid nanostructures},
  doi       = {10.25932/publishup-57180},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-571801},
  school      = {Universit{\"a}t Potsdam},
  pages     = {119},
  year      = {2023},
  abstract  = {Hybrid nanomaterials offer the combination of individual properties of different types of nanoparticles. Some strategies for the development of new nanostructures in larger scale rely on the self-assembly of nanoparticles as a bottom-up approach. The use of templates provides ordered assemblies in defined patterns. In a typical soft-template, nanoparticles and other surface-active agents are incorporated into non-miscible liquids. The resulting self-organized dispersions will mediate nanoparticle interactions to control the subsequent self-assembly. Especially interactions between nanoparticles of very different dispersibility and functionality can be directed at a liquid-liquid interface. In this project, water-in-oil microemulsions were formulated from quasi-ternary mixtures with Aerosol-OT as surfactant. Oleyl-capped superparamagnetic iron oxide and/or silver nanoparticles were incorporated in the continuous organic phase, while polyethyleneimine-stabilized gold nanoparticles were confined in the dispersed water droplets. Each type of nanoparticle can modulate the surfactant film and the inter-droplet interactions in diverse ways, and their combination causes synergistic effects. Interfacial assemblies of nanoparticles resulted after phase-separation. On one hand, from a biphasic Winsor type II system at low surfactant concentration, drop-casting of the upper phase afforded thin films of ordered nanoparticles in filament-like networks. Detailed characterization proved that this templated assembly over a surface is based on the controlled clustering of nanoparticles and the elongation of the microemulsion droplets. This process offers versatility to use different nanoparticle compositions by keeping the surface functionalization, in different solvents and over different surfaces. On the other hand, a magnetic heterocoagulate was formed at higher surfactant concentration, whose phase-transfer from oleic acid to water was possible with another auxiliary surfactant in ethanol-water mixture. When the original components were initially mixed under heating, defined oil-in-water, magnetic-responsive nanostructures were obtained, consisting on water-dispersible nanoparticle domains embedded by a matrix-shell of oil-dispersible nanoparticles. Herein, two different approaches were demonstrated to form diverse hybrid nanostructures from reverse microemulsions as self-organized dispersions of the same components. This shows that microemulsions are versatile soft-templates not only for the synthesis of nanoparticles, but also for their self-assembly, which suggest new approaches towards the production of new sophisticated nanomaterials in larger scale.},
  language  = {en}
}
@phdthesis{Schmidt2023,
  author    = {Schmidt, Christian},
  title     = {Vom Trauma zum bedeutungsvollen Ersterlebnis},
  publisher = {Karl Alber},
  address   = {Baden-Baden},
  isbn      = {978-3-4959-9450-4},
  doi       = {10.5771/9783495994511},
  pages     = {342},
  year      = {2023},
  abstract  = {Ausgehend von {\"U}berlegungen des anthropologisch orientierten Psychiaters Erwin Straus geht dieses Buch der Frage nach, welche Bedingungen vorliegen, wenn bestimmte Ereignisse von Personen als bedeutsam erlebt werden. Des Weiteren wird ausf{\"u}hrlich er{\"o}rtert, wie sich Personalit{\"a}t im Menschen ausbildet und inwieweit sie von der gelingenden Integration bedeutungsvoller Ersterlebnisse abh{\"a}ngt. Das dabei zugrundeliegende Person-Konzept stellt einen eigenst{\"a}ndigen Syntheseversuch der vier Konzepte von Erwin Straus, Viktor Emil von Gebsattel, Helmuth Plessner und Max Scheler dar. Der Autor arbeitet in ober{\"a}rztlicher Funktion am Klinikum Schloss L{\"u}tgenhof in Dassow, einer Akutklinik f{\"u}r Personale Medizin, integrierte Psychosomatik, Innere Medizin und Psychotherapie},
  language  = {de}
}