@article{FrohnLiebschPech2023, author = {Frohn, Julia and Liebsch, Ann-Catherine and Pech, Detlef}, title = {(Meta-)Reflexion f{\"u}r Inklusion}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-62910}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-629103}, pages = {139 -- 146}, year = {2023}, abstract = {Im Sinne einer „Meta-Reflexivit{\"a}t" zielt dieser Beitrag darauf ab, den strukturtheoretischen und kompetenzorientierten Professionalisierungsansatz im Konstrukt der adaptiven Lehrkompetenz zusammenzuf{\"u}hren, was vor allem f{\"u}r inklusionsorientierte Ans{\"a}tze vielversprechend erscheint: Anhand der Konstruktfacetten adaptiver diagnostischer, didaktischer sowie Sach- und Klassenf{\"u}hrungskompetenz werden m{\"o}gliche Herangehensweisen f{\"u}r eine inklusionsorientierte Lehrkr{\"a}ftebildung formuliert, die sowohl konkrete Kompetenzbereiche benennen als auch die Reflexion entsprechender Spannungsverh{\"a}ltnisse im strukturtheoretischen Sinne voraussetzen. So soll der Beitrag einen knappen theoretischen Aufriss zur Zusammenf{\"u}hrung der unterschiedlichen Professionalisierungsans{\"a}tze unter der Pr{\"a}misse (mehr) Reflexion f{\"u}r (mehr) Inklusion leisten.}, language = {de} } @phdthesis{Yadav2023, author = {Yadav, Himanshu}, title = {A computational evaluation of feature distortion and cue weighting in sentence comprehension}, doi = {10.25932/publishup-58505}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-585055}, school = {Universit{\"a}t Potsdam}, pages = {iv, 115}, year = {2023}, abstract = {Successful sentence comprehension requires the comprehender to correctly figure out who did what to whom. For example, in the sentence John kicked the ball, the comprehender has to figure out who did the action of kicking and what was being kicked. This process of identifying and connecting the syntactically-related words in a sentence is called dependency completion. What are the cognitive constraints that determine dependency completion? A widely-accepted theory is cue-based retrieval. The theory maintains that dependency completion is driven by a content-addressable search for the co-dependents in memory. The cue-based retrieval explains a wide range of empirical data from several constructions including subject-verb agreement, subject-verb non-agreement, plausibility mismatch configurations, and negative polarity items. However, there are two major empirical challenges to the theory: (i) Grammatical sentences' data from subject-verb number agreement dependencies, where the theory predicts a slowdown at the verb in sentences like the key to the cabinet was rusty compared to the key to the cabinets was rusty, but the data are inconsistent with this prediction; and, (ii) Data from antecedent-reflexive dependencies, where a facilitation in reading times is predicted at the reflexive in the bodybuilder who worked with the trainers injured themselves vs. the bodybuilder who worked with the trainer injured themselves, but the data do not show a facilitatory effect. The work presented in this dissertation is dedicated to building a more general theory of dependency completion that can account for the above two datasets without losing the original empirical coverage of the cue-based retrieval assumption. In two journal articles, I present computational modeling work that addresses the above two empirical challenges. To explain the grammatical sentences' data from subject-verb number agreement dependencies, I propose a new model that assumes that the cue-based retrieval operates on a probabilistically distorted representation of nouns in memory (Article I). This hybrid distortion-plus-retrieval model was compared against the existing candidate models using data from 17 studies on subject-verb number agreement in 4 languages. I find that the hybrid model outperforms the existing models of number agreement processing suggesting that the cue-based retrieval theory must incorporate a feature distortion assumption. To account for the absence of facilitatory effect in antecedent-reflexive dependen� cies, I propose an individual difference model, which was built within the cue-based retrieval framework (Article II). The model assumes that individuals may differ in how strongly they weigh a syntactic cue over a number cue. The model was fitted to data from two studies on antecedent-reflexive dependencies, and the participant-level cue-weighting was estimated. We find that one-fourth of the participants, in both studies, weigh the syntactic cue higher than the number cue in processing reflexive dependencies and the remaining participants weigh the two cues equally. The result indicates that the absence of predicted facilitatory effect at the level of grouped data is driven by some, not all, participants who weigh syntactic cues higher than the number cue. More generally, the result demonstrates that the assumption of differential cue weighting is important for a theory of dependency completion processes. This differential cue weighting idea was independently supported by a modeling study on subject-verb non-agreement dependencies (Article III). Overall, the cue-based retrieval, which is a general theory of dependency completion, needs to incorporate two new assumptions: (i) the nouns stored in memory can undergo probabilistic feature distortion, and (ii) the linguistic cues used for retrieval can be weighted differentially. This is the cumulative result of the modeling work presented in this dissertation. The dissertation makes an important theoretical contribution: Sentence comprehension in humans is driven by a mechanism that assumes cue-based retrieval, probabilistic feature distortion, and differential cue weighting. This insight is theoretically important because there is some independent support for these three assumptions in sentence processing and the broader memory literature. The modeling work presented here is also methodologically important because for the first time, it demonstrates (i) how the complex models of sentence processing can be evaluated using data from multiple studies simultaneously, without oversimplifying the models, and (ii) how the inferences drawn from the individual-level behavior can be used in theory development.}, language = {en} } @techreport{BaganzdeTeresaLinggetal.2023, type = {Working Paper}, author = {Baganz, Melissa and de Teresa, Aurelia G{\´o}mez and Lingg, Rosana T. and Montijo, Yuriditzi Pascacio}, title = {A critical assessment on National Action Plans}, series = {Staat, Recht und Politik - Forschungs- und Diskussionspapiere}, journal = {Staat, Recht und Politik - Forschungs- und Diskussionspapiere}, number = {13}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2509-6974}, doi = {10.25932/publishup-57679}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-576797}, pages = {11}, year = {2023}, abstract = {National Action Plans (NAPs) have been increas-ingly adopted world-wide after the Vienna Dec-laration in 1993, where it was urged to consider the improvement and promotion of Human Rights. In this paper, we discuss their usefulness and success by analysing the challenges present-ed during NAP processes as well as the benefits this set of actions entails: The challenges for their implementation outweigh its actual benefits. Nevertheless, NAPs have great potential. Based on new research, we elaborate a set of recom-mendations for improving the design and imple-mentation of national action planning. In order to effectively bring NAP into practice, we consider it crucial to plan and analyse every state local circumstances in detail. The latter is important, since the implementation of a concrete set of actions is intended to directly transform and improve the local living conditions of the people. In a long-term perspective, we defend the benefit of NAP's implementation for complying obliga-tions set up by HR treaties.}, language = {en} } @techreport{Hajos2023, type = {Working Paper}, author = {Hajos, Yael}, title = {A Critical Overview of the Public Health Emergency of International Concern Mechanism}, series = {Staat, Recht und Politik - Forschungs- und Diskussionspapiere}, journal = {Staat, Recht und Politik - Forschungs- und Diskussionspapiere}, number = {15}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2509-6974}, doi = {10.25932/publishup-58523}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-585238}, pages = {20}, year = {2023}, abstract = {The last years have been affected by Covid-19 and the international emergency mecha-nism to deal with health-related threats. The effects of this period manifested differ-ently worldwide, depending on matters such as international relations, national policies, power dynamics etc. Additionally, the impact of this time will likely have long-term effects which are yet to be known. This paper gives a critical overview of the Public Health Emergency of International Concern (PHEIC) mechanism in the context of Covid-19. It does so by explaining the legal framework for states of emergency, specifically in the context of a PHEIC, while considering its restrictions and limitations on human rights. It further outlines issues in the manifestation of global protections and limitations on human rights during Covid-19. Lastly, considering the likelihood of future PHEICs and the known systemic obstructions, this paper offers ways to im-prove this mechanism from a holistic, non-zero-sum perspective.}, language = {en} } @misc{PanzerBenderGronau2023, author = {Panzer, Marcel and Bender, Benedict and Gronau, Norbert}, title = {A deep reinforcement learning based hyper-heuristic for modular production control}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, issn = {1867-5808}, doi = {10.25932/publishup-60564}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-605642}, pages = {24}, year = {2023}, abstract = {In nowadays production, fluctuations in demand, shortening product life-cycles, and highly configurable products require an adaptive and robust control approach to maintain competitiveness. This approach must not only optimise desired production objectives but also cope with unforeseen machine failures, rush orders, and changes in short-term demand. Previous control approaches were often implemented using a single operations layer and a standalone deep learning approach, which may not adequately address the complex organisational demands of modern manufacturing systems. To address this challenge, we propose a hyper-heuristics control model within a semi-heterarchical production system, in which multiple manufacturing and distribution agents are spread across pre-defined modules. The agents employ a deep reinforcement learning algorithm to learn a policy for selecting low-level heuristics in a situation-specific manner, thereby leveraging system performance and adaptability. We tested our approach in simulation and transferred it to a hybrid production environment. By that, we were able to demonstrate its multi-objective optimisation capabilities compared to conventional approaches in terms of mean throughput time, tardiness, and processing of prioritised orders in a multi-layered production system. The modular design is promising in reducing the overall system complexity and facilitates a quick and seamless integration into other scenarios.}, language = {en} } @article{StaubitzSerthThomasetal.2023, author = {Staubitz, Thomas and Serth, Sebastian and Thomas, Max and Ebner, Martin and Koschutnig-Ebner, Markus and Rampelt, Florian and von Stetten, Alexander and Wittke, Andreas}, title = {A metastandard for the international exchange of MOOCs}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62415}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624154}, pages = {147 -- 161}, year = {2023}, abstract = {The MOOChub is a joined web-based catalog of all relevant German and Austrian MOOC platforms that lists well over 750 Massive Open Online Courses (MOOCs). Automatically building such a catalog requires that all partners describe and publicly offer the metadata of their courses in the same way. The paper at hand presents the genesis of the idea to establish a common metadata standard and the story of its subsequent development. The result of this effort is, first, an open-licensed de-facto-standard, which is based on existing commonly used standards and second, a first prototypical platform that is using this standard: the MOOChub, which lists all courses of the involved partners. This catalog is searchable and provides a more comprehensive overview of basically all MOOCs that are offered by German and Austrian MOOC platforms. Finally, the upcoming developments to further optimize the catalog and the metadata standard are reported.}, language = {en} } @article{ShlakaOuahibBerrada2023, author = {Shlaka, Souhad and Ouahib, Sara and Berrada, Khalid}, title = {A retrospective feedback of MOOCS in Morocco}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62482}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624826}, pages = {317 -- 327}, year = {2023}, abstract = {The integration of MOOCs into the Moroccan Higher Education (MHE) took place in 2013 by developing different partnerships and projects at national and international levels. As elsewhere, the Covid-19 crisis has played an important role in accelerating distance education in MHE. However, based on our experience as both university professors and specialists in educational engineering, the effective execution of the digital transition has not yet been implemented. Thus, in this article, we present a retrospective feedback of MOOCs in Morocco, focusing on the policies taken by the government to better support the digital transition in general and MOOCs in particular. We are therefore seeking to establish an optimal scenario for the promotion of MOOCs, which emphasizes the policies to be considered, and which recalls the importance of conducting a delicate articulation taking into account four levels, namely environmental, institutional, organizational and individual. We conclude with recommendations that are inspired by the Moroccan academic contex that focus on the major role that MOOCs plays for university students and on maintaining lifelong learning.}, language = {en} } @phdthesis{Chen2023, author = {Chen, Junchao}, title = {A self-adaptive resilient method for implementing and managing the high-reliability processing system}, doi = {10.25932/publishup-58313}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-583139}, school = {Universit{\"a}t Potsdam}, pages = {XXIII, 167}, year = {2023}, abstract = {As a result of CMOS scaling, radiation-induced Single-Event Effects (SEEs) in electronic circuits became a critical reliability issue for modern Integrated Circuits (ICs) operating under harsh radiation conditions. SEEs can be triggered in combinational or sequential logic by the impact of high-energy particles, leading to destructive or non-destructive faults, resulting in data corruption or even system failure. Typically, the SEE mitigation methods are deployed statically in processing architectures based on the worst-case radiation conditions, which is most of the time unnecessary and results in a resource overhead. Moreover, the space radiation conditions are dynamically changing, especially during Solar Particle Events (SPEs). The intensity of space radiation can differ over five orders of magnitude within a few hours or days, resulting in several orders of magnitude fault probability variation in ICs during SPEs. This thesis introduces a comprehensive approach for designing a self-adaptive fault resilient multiprocessing system to overcome the static mitigation overhead issue. This work mainly addresses the following topics: (1) Design of on-chip radiation particle monitor for real-time radiation environment detection, (2) Investigation of space environment predictor, as support for solar particle events forecast, (3) Dynamic mode configuration in the resilient multiprocessing system. Therefore, according to detected and predicted in-flight space radiation conditions, the target system can be configured to use no mitigation or low-overhead mitigation during non-critical periods of time. The redundant resources can be used to improve system performance or save power. On the other hand, during increased radiation activity periods, such as SPEs, the mitigation methods can be dynamically configured appropriately depending on the real-time space radiation environment, resulting in higher system reliability. Thus, a dynamic trade-off in the target system between reliability, performance and power consumption in real-time can be achieved. All results of this work are evaluated in a highly reliable quad-core multiprocessing system that allows the self-adaptive setting of optimal radiation mitigation mechanisms during run-time. Proposed methods can serve as a basis for establishing a comprehensive self-adaptive resilient system design process. Successful implementation of the proposed design in the quad-core multiprocessor shows its application perspective also in the other designs.}, language = {en} } @article{NohrHaugsbakken2023, author = {Nohr, Magnus and Haugsbakken, Halvdan}, title = {A taxonomy of video genres as a scaffolding strategy for video making in education}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62429}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624294}, pages = {201 -- 220}, year = {2023}, abstract = {This research paper aims to introduce a novel practitioner-oriented and research-based taxonomy of video genres. This taxonomy can serve as a scaffolding strategy to support educators throughout the entire educational system in creating videos for pedagogical purposes. A taxonomy of video genres is essential as videos are highly valued resources among learners. Although the use of videos in education has been extensively researched and well-documented in systematic research reviews, gaps remain in the literature. Predominantly, researchers employ sophisticated quantitative methods and similar approaches to measure the performance of videos. This trend has led to the emergence of a strong learning analytics research tradition with its embedded literature. This body of research includes analysis of performance of videos in online courses such as Massive Open Online Courses (MOOCs). Surprisingly, this same literature is limited in terms of research outlining approaches to designing and creating educational videos, which applies to both video-based learning and online courses. This issue results in a knowledge gap, highlighting the need for developing pedagogical tools and strategies for video making. These can be found in frameworks, guidelines, and taxonomies, which can serve as scaffolding strategies. In contrast, there appears to be very few frameworks available for designing and creating videos for pedagogica purposes, apart from a few well-known frameworks. In this regard, this research paper proposes a novel taxonomy of video genres that educators can utilize when creating videos intended for use in either video-based learning environments or online courses. To create this taxonomy, a large number of videos from online courses were collected and analyzed using a mixed-method research design approach.}, language = {en} } @article{Stellmacher2023, author = {Stellmacher, Martha}, title = {Abgelegte Musik}, series = {Genisa-Bl{\"a}tter IV}, journal = {Genisa-Bl{\"a}tter IV}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-539-2}, doi = {10.25932/publishup-58490}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-584908}, pages = {83 -- 95}, year = {2023}, language = {de} } @phdthesis{Katzmann2023, author = {Katzmann, Maximilian}, title = {About the analysis of algorithms on networks with underlying hyperbolic geometry}, doi = {10.25932/publishup-58296}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-582965}, school = {Universit{\"a}t Potsdam}, pages = {xi, 191}, year = {2023}, abstract = {Many complex systems that we encounter in the world can be formalized using networks. Consequently, they have been in the focus of computer science for decades, where algorithms are developed to understand and utilize these systems. Surprisingly, our theoretical understanding of these algorithms and their behavior in practice often diverge significantly. In fact, they tend to perform much better on real-world networks than one would expect when considering the theoretical worst-case bounds. One way of capturing this discrepancy is the average-case analysis, where the idea is to acknowledge the differences between practical and worst-case instances by focusing on networks whose properties match those of real graphs. Recent observations indicate that good representations of real-world networks are obtained by assuming that a network has an underlying hyperbolic geometry. In this thesis, we demonstrate that the connection between networks and hyperbolic space can be utilized as a powerful tool for average-case analysis. To this end, we first introduce strongly hyperbolic unit disk graphs and identify the famous hyperbolic random graph model as a special case of them. We then consider four problems where recent empirical results highlight a gap between theory and practice and use hyperbolic graph models to explain these phenomena theoretically. First, we develop a routing scheme, used to forward information in a network, and analyze its efficiency on strongly hyperbolic unit disk graphs. For the special case of hyperbolic random graphs, our algorithm beats existing performance lower bounds. Afterwards, we use the hyperbolic random graph model to theoretically explain empirical observations about the performance of the bidirectional breadth-first search. Finally, we develop algorithms for computing optimal and nearly optimal vertex covers (problems known to be NP-hard) and show that, on hyperbolic random graphs, they run in polynomial and quasi-linear time, respectively. Our theoretical analyses reveal interesting properties of hyperbolic random graphs and our empirical studies present evidence that these properties, as well as our algorithmic improvements translate back into practice.}, language = {en} } @phdthesis{Stanke2023, author = {Stanke, Sandra}, title = {AC electrokinetic immobilization of influenza viruses and antibodies on nanoelectrode arrays for on-chip immunoassays}, doi = {10.25932/publishup-61716}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-617165}, school = {Universit{\"a}t Potsdam}, pages = {x, 115}, year = {2023}, abstract = {In the present thesis, AC electrokinetic forces, like dielectrophoresis and AC electroosmosis, were demonstrated as a simple and fast method to functionalize the surface of nanoelectrodes with submicrometer sized biological objects. These nanoelectrodes have a cylindrical shape with a diameter of 500 nm arranged in an array of 6256 electrodes. Due to its medical relevance influenza virus as well as anti-influenza antibodies were chosen as a model organism. Common methods to bring antibodies or proteins to biosensor surfaces are complex and time-consuming. In the present work, it was demonstrated that by applying AC electric fields influenza viruses and antibodies can be immobilized onto the nanoelectrodes within seconds without any prior chemical modification of neither the surface nor the immobilized biological object. The distribution of these immobilized objects is not uniform over the entire array, it exhibits a decreasing gradient from the outer row to the inner ones. Different causes for this gradient have been discussed, such as the vortex-shaped fluid motion above the nanoelectrodes generated by, among others, electrothermal fluid flow. It was demonstrated that parts of the accumulated material are permanently immobilized to the electrodes. This is a unique characteristic of the presented system since in the literature the AC electrokinetic immobilization is almost entirely presented as a method just for temporary immobilization. The spatial distribution of the immobilized viral material or the anti-influenza antibodies at the electrodes was observed by either the combination of fluorescence microscopy and deconvolution or by super-resolution microscopy (STED). On-chip immunoassays were performed to examine the suitability of the functionalized electrodes as a potential affinity-based biosensor. Two approaches were pursued: A) the influenza virus as the bio-receptor or B) the influenza virus as the analyte. Different sources of error were eliminated by ELISA and passivation experiments. Hence, the activity of the immobilized object was inspected by incubation with the analyte. This resulted in the successful detection of anti-influenza antibodies by the immobilized viral material. On the other hand, a detection of influenza virus particles by the immobilized anti-influenza antibodies was not possible. The latter might be due to lost activity or wrong orientation of the antibodies. Thus, further examinations on the activity of by AC electric fields immobilized antibodies should follow. When combined with microfluidics and an electrical read-out system, the functionalized chips possess the potential to serve as a rapid, portable, and cost-effective point-of-care (POC) device. This device can be utilized as a basis for diverse applications in diagnosing and treating influenza, as well as various other pathogens.}, language = {en} } @phdthesis{Markov2023, author = {Markov, Adrian}, title = {Acute effects of exercise order in concurrent training on immunological stress responses and measures of muscular fitness in youth athletes of both sexes}, doi = {10.25932/publishup-61851}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-618517}, school = {Universit{\"a}t Potsdam}, pages = {X, 81}, year = {2023}, abstract = {Background and aims: To succeed in competition, elite team and individual athletes often seek the development of both, high levels of muscle strength and power as well as cardiorespiratory endurance. In this context, concurrent training (CT) is a commonly applied and effective training approach. While being exposed to high training loads, youth athletes (≤ 18 years) are yet underrepresented in the scientific literature. Besides, immunological responses to CT have received little attention. Therefore, the aims of this work were to examine the acute (< 15min) and delayed (≥ 6 hours) effects of dif-ferent exercise order in CT on immunological stress responses, muscular fitness, metabolic response, and rating of perceived exertion (RPE) in highly trained youth male and female judo athletes. Methods: A total of twenty male and thirteen female participants, with an average age of 16 ± 1.8 years and 14.4 ± 2.1 years, respectively, were included in the study. They were randomly assigned to two CT sessions; power-endurance versus endurance-power (i.e., study 1), or strength-endurance versus endurance-strength (i.e., study 2). Markers of immune response (i.e., white-blood-cells, granulocytes, lymphocytes, mon-ocytes, and lymphocytes, granulocyte-lymphocyte-ratio, and systemic-inflammation-index), muscular fitness (i.e., counter-movement jump [CMJ]), metabolic responses (i.e., blood lactate, glucose), and RPE were collected at different time points (i.e., PRE12H, PRE, MID, POST, POST6H, POST22H). Results (study 1): There were significant time*order interactions for white-blood-cells, lymphocytes, granulocytes, monocytes, granulocyte-lymphocyte-ratio, and systemic-inflammation-index. The power-endurance order resulted in significantly larger PRE-to-POST increases in white-blood-cells, monocytes, and lymphocytes while the endur-ance-power order resulted in significantly larger PRE-to-POST increases in the granu-locyte-lymphocyte-ratio and systemic-inflammation-index. Likewise, significantly larger increases from PRE-to-POST6H in white-blood-cells and granulocytes were observed following the power-endurance order compared to endurance-power. All markers of immune response returned toward baseline values at POST22H. Moreover, there was a significant time*order interaction for blood glucose and lactate. Following the endur-ance-power order, blood lactate and glucose increased from PRE-to-MID but not from PRE-to-POST. Meanwhile, in the power-endurance order blood lactate and glucose increased from PRE-to-POST but not from PRE-to-MID. A significant time*order inter-action was observed for CMJ-force with larger PRE-to-POST decreases in the endur-ance-power order compared to power-endurance order. Further, CMJ-power showed larger PRE-to-MID performance decreases following the power-endurance order, com-pared to the endurance-power order. Regarding RPE, significant time*order interactions were noted with larger PRE-to-MID values following the endurance-power order and larger PRE-to-POST values following the power-endurance order. Results (study 2): There were significant time*order interactions for lymphocytes, monocytes, granulocyte-lymphocyte-ratio, and systemic-inflammation-index. The strength-endurance order resulted in significantly larger PRE-to-POST increases in lymphocytes while the endurance-strength order resulted in significantly larger PRE-to-POST increases in the granulocyte-lymphocyte-ratio and systemic-inflammation-index. All markers of the immune system returned toward baseline values at POST22H. Moreover, there was a significant time*order interaction for blood glucose and lactate. From PRE-to-MID, there was a significantly greater increase in blood lactate and glu-cose following the endurance-strength order compared to strength-endurance order. Meanwhile, from PRE-to-POST there was a significantly higher increase in blood glu-cose following the strength-endurance order compared to endurance-strength order. Regarding physical fitness, a significant time*order interaction was observed for CMJ-force and CMJ-power with larger PRE-to-MID increases following the endurance-strength order compared to the strength-endurance order. For RPE, significant time*order interactions were noted with larger PRE-to-MID values following the endur-ance-power order and larger PRE-to-POST values following the power-endurance or-der. Conclusions: The primary findings from both studies revealed order-dependent effects on immune responses. In male youth judo athletes, the results demonstrated greater immunological stress responses, both immediately (≤ 15 min) and delayed (≥ 6 hours), following the power-endurance order compared to the endurance-power order. For female youth judo athletes, the results indicated higher acute, but not delayed, order-dependent changes in immune responses following the strength-endurance order compared to the endurance-strength order. It is worth noting that in both studies, all markers of immune system response returned to baseline levels within 22 hours. This suggests that successful recovery from the exercise-induced immune stress response was achieved within 22 hours. Regarding metabolic responses, physical fitness, and perceived exertion, the findings from both studies indicated acute (≤ 15 minutes) alterations that were dependent on the exercise order. These alterations were primarily influ-enced by the endurance exercise component. Moreover, study 1 provided substantial evidence suggesting that internal load measures, such as immune markers, may differ from external load measures. This indicates a disparity between immunological, perceived, and physical responses following both concurrent training orders. Therefore, it is crucial for practitioners to acknowledge these differences and take them into consideration when designing training programs.}, language = {en} } @phdthesis{ArboledaZapata2023, author = {Arboleda Zapata, Mauricio}, title = {Adapted inversion strategies for electrical resistivity data to explore layered near-surface environments}, doi = {10.25932/publishup-58135}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-581357}, school = {Universit{\"a}t Potsdam}, pages = {115}, year = {2023}, abstract = {The electrical resistivity tomography (ERT) method is widely used to investigate geological, geotechnical, and hydrogeological problems in inland and aquatic environments (i.e., lakes, rivers, and seas). The objective of the ERT method is to obtain reliable resistivity models of the subsurface that can be interpreted in terms of the subsurface structure and petrophysical properties. The reliability of the resulting resistivity models depends not only on the quality of the acquired data, but also on the employed inversion strategy. Inversion of ERT data results in multiple solutions that explain the measured data equally well. Typical inversion approaches rely on different deterministic (local) strategies that consider different smoothing and damping strategies to stabilize the inversion. However, such strategies suffer from the trade-off of smearing possible sharp subsurface interfaces separating layers with resistivity contrasts of up to several orders of magnitude. When prior information (e.g., from outcrops, boreholes, or other geophysical surveys) suggests sharp resistivity variations, it might be advantageous to adapt the parameterization and inversion strategies to obtain more stable and geologically reliable model solutions. Adaptations to traditional local inversions, for example, by using different structural and/or geostatistical constraints, may help to retrieve sharper model solutions. In addition, layer-based model parameterization in combination with local or global inversion approaches can be used to obtain models with sharp boundaries. In this thesis, I study three typical layered near-surface environments in which prior information is used to adapt 2D inversion strategies to favor layered model solutions. In cooperation with the coauthors of Chapters 2-4, I consider two general strategies. Our first approach uses a layer-based model parameterization and a well-established global inversion strategy to generate ensembles of model solutions and assess uncertainties related to the non-uniqueness of the inverse problem. We apply this method to invert ERT data sets collected in an inland coastal area of northern France (Chapter~2) and offshore of two Arctic regions (Chapter~3). Our second approach consists of using geostatistical regularizations with different correlation lengths. We apply this strategy to a more complex subsurface scenario on a local intermountain alluvial fan in southwestern Germany (Chapter~4). Overall, our inversion approaches allow us to obtain resistivity models that agree with the general geological understanding of the studied field sites. These strategies are rather general and can be applied to various geological environments where a layered subsurface structure is expected. The flexibility of our strategies allows adaptations to invert other kinds of geophysical data sets such as seismic refraction or electromagnetic induction methods, and could be considered for joint inversion approaches.}, language = {en} } @article{OpelNetzerDesel2023, author = {Opel, Simone and Netzer, Cajus Marian and Desel, J{\"o}rg}, title = {Adaption von Lernwegen in adaptierten Lehrmaterialien f{\"u}r Studierende mit Berufsausbildungsabschluss}, series = {Hochschuldidaktik Informatik HDI 2021 (Commentarii informaticae didacticae)}, journal = {Hochschuldidaktik Informatik HDI 2021 (Commentarii informaticae didacticae)}, number = {13}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-548-4}, issn = {1868-0844}, doi = {10.25932/publishup-61418}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-614188}, pages = {91 -- 114}, year = {2023}, abstract = {Obwohl immer mehr Menschen nicht direkt ein Studium aufnehmen, sondern zuvor eine berufliche Ausbildung absolvieren, werden die in der Ausbildung erworbenen Kompetenzen von den Hochschulen inhaltlich und didaktisch meist ignoriert. Ein Ansatz, diese Kompetenzen zu w{\"u}rdigen, ist die formale Anrechnung von mitgebrachten Kompetenzen als (f{\"u}r den Studienabschluss erforderliche) Leistungspunkte. Eine andere Variante ist der Einsatz von speziell f{\"u}r die Zielgruppe der Studierenden mit Vorkenntnissen adaptiertem Lehr-Lernmaterial. Um dar{\"u}ber hinaus individuelle Unterschiede zu ber{\"u}cksichtigen, erlaubt eine weitere Adaption individueller Lernpfade den Lernenden, genau die jeweils fehlenden Kompetenzen zu erwerben. In diesem Beitrag stellen wir die exemplarische Entwicklung derartigen Materials anhand des Kurses „Datenbanken" f{\"u}r die Zielgruppe der Studierenden mit einer abgeschlossenen Ausbildung zum Fachinformatiker bzw. zur Fachinformatikerin vor.}, language = {de} } @phdthesis{Reich2023, author = {Reich, Marvin}, title = {Advances in hydrogravimetry}, doi = {10.25932/publishup-60479}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-604794}, school = {Universit{\"a}t Potsdam}, pages = {ix, 142}, year = {2023}, abstract = {The interest of the hydrological community in the gravimetric method has steadily increased within the last decade. This is reflected by numerous studies from many different groups with a broad range of approaches and foci. Many of those are traditionally rather hydrology-oriented groups who recognized gravimetry as a potential added value for their hydrological investigations. While this resulted in a variety of interesting and useful findings, contributing to extend the respective knowledge and confirming the methodological potential, on the other hand, many interesting and unresolved questions emerged. This thesis manifests efforts, analyses and solutions carried out in this regard. Addressing and evaluating many of those unresolved questions, the research contributes to advancing hydrogravimetry, the combination of gravimetric and hydrological methods, in showing how gravimeters are a highly useful tool for applied hydrological field research. In the first part of the thesis, traditional setups of stationary terrestrial superconducting gravimeters are addressed. They are commonly installed within a dedicated building, the impermeable structure of which shields the underlying soil from natural exchange of water masses (infiltration, evapotranspiration, groundwater recharge). As gravimeters are most sensitive to mass changes directly beneath the meter, this could impede their suitability for local hydrological process investigations, especially for near-surface water storage changes (WSC). By studying temporal local hydrological dynamics at a dedicated site equipped with traditional hydrological measurement devices, both below and next to the building, the impact of these absent natural dynamics on the gravity observations were quantified. A comprehensive analysis with both a data-based and model-based approach led to the development of an alternative method for dealing with this limitation. Based on determinable parameters, this approach can be transferred to a broad range of measurement sites where gravimeters are deployed in similar structures. Furthermore, the extensive considerations on this topic enabled a more profound understanding of this so called umbrella effect. The second part of the thesis is a pilot study about the field deployment of a superconducting gravimeter. A newly developed field enclosure for this gravimeter was tested in an outdoor installation adjacent to the building used to investigate the umbrella effect. Analyzing and comparing the gravity observations from both indoor and outdoor gravimeters showed performance with respect to noise and stable environmental conditions was equivalent while the sensitivity to near-surface WSC was highly increased for the field deployed instrument. Furthermore it was demonstrated that the latter setup showed gravity changes independent of the depth where mass changes occurred, given their sufficiently wide horizontal extent. As a consequence, the field setup suits monitoring of WSC for both short and longer time periods much better. Based on a coupled data-modeling approach, its gravity time series was successfully used to infer and quantify local water budget components (evapotranspiration, lateral subsurface discharge) on the daily to annual time scale. The third part of the thesis applies data from a gravimeter field deployment for applied hydrological process investigations. To this end, again at the same site, a sprinkling experiment was conducted in a 15 x 15 m area around the gravimeter. A simple hydro-gravimetric model was developed for calculating the gravity response resulting from water redistribution in the subsurface. It was found that, from a theoretical point of view, different subsurface water distribution processes (macro pore flow, preferential flow, wetting front advancement, bypass flow and perched water table rise) lead to a characteristic shape of their resulting gravity response curve. Although by using this approach it was possible to identify a dominating subsurface water distribution process for this site, some clear limitations stood out. Despite the advantage for field installations that gravimetry is a non-invasive and integral method, the problem of non-uniqueness could only be overcome by additional measurements (soil moisture, electric resistivity tomography) within a joint evaluation. Furthermore, the simple hydrological model was efficient for theoretical considerations but lacked the capability to resolve some heterogeneous spatial structures of water distribution up to a needed scale. Nevertheless, this unique setup for plot to small scale hydrological process research underlines the high potential of gravimetery and the benefit of a field deployment. The fourth and last part is dedicated to the evaluation of potential uncertainties arising from the processing of gravity observations. The gravimeter senses all mass variations in an integral way, with the gravitational attraction being directly proportional to the magnitude of the change and inversely proportional to the square of the distance of the change. Consequently, all gravity effects (for example, tides, atmosphere, non-tidal ocean loading, polar motion, global hydrology and local hydrology) are included in an aggregated manner. To isolate the signal components of interest for a particular investigation, all non-desired effects have to be removed from the observations. This process is called reduction. The large-scale effects (tides, atmosphere, non-tidal ocean loading and global hydrology) cannot be measured directly and global model data is used to describe and quantify each effect. Within the reduction process, model errors and uncertainties propagate into the residual, the result of the reduction. The focus of this part of the thesis is quantifying the resulting, propagated uncertainty for each individual correction. Different superconducting gravimeter installations were evaluated with respect to their topography, distance to the ocean and the climate regime. Furthermore, different time periods of aggregated gravity observation data were assessed, ranging from 1 hour up to 12 months. It was found that uncertainties were highest for a frequency of 6 months and smallest for hourly frequencies. Distance to the ocean influences the uncertainty of the non-tidal ocean loading component, while geographical latitude affects uncertainties of the global hydrological component. It is important to highlight that the resulting correction-induced uncertainties in the residual have the potential to mask the signal of interest, depending on the signal magnitude and its frequency. These findings can be used to assess the value of gravity data across a range of applications and geographic settings. In an overarching synthesis all results and findings are discussed with a general focus on their added value for bringing hydrogravimetric field research to a new level. The conceptual and applied methodological benefits for hydrological studies are highlighted. Within an outlook for future setups and study designs, it was once again shown what enormous potential is offered by gravimeters as hydrological field tools.}, language = {en} } @phdthesis{Timme2023, author = {Timme, Sinika}, title = {Affective responses during exercise and situated exercise-related decision-making}, doi = {10.25932/publishup-61432}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-614323}, school = {Universit{\"a}t Potsdam}, pages = {V, 123}, year = {2023}, abstract = {The field of exercise psychology has established robust evidence on the health benefits of physical activity. However, interventions to promote sustained exercise behavior have often proven ineffective. This dissertation addresses challenges in the field, particularly the neglect of situated and affective processes in understanding and changing exercise behavior. Dual process models, considering both rational and affective processes, have gained recognition. The Affective Reflective Theory of Physical Inactivity and Exercise (ART) is a notable model in this context, positing that situated processes in-the-moment of choice influence exercise decisions and subsequent exercise behavior. The dissertation identifies current challenges within exercise psychology and proposes methodological and theoretical advancements. It emphasizes the importance of momentary affective states and situated processes, offering alternatives to self-reported measures and advocating for a more comprehensive modeling of individual variability. The focus is on the affective processes during exercise, theorized to reappear in momentary decision-making, shaping overall exercise behavior. The first publication introduces a new method by using automated facial action analysis to measure variable affective responses during exercise. It explores how these behavioral indicators covary with self-reported measures of affective valence and perceived exertion. The second publication delves into situated processes at the moment of choice between exercise and non-exercise options, revealing that intraindividual factors play a crucial role in explaining exercise-related choices. The third publication presents an open-source research tool, the Decisional Preferences in Exercising Test (DPEX), designed to capture repeated situated decisions and predict exercise behavior based on past experiences. The findings challenge previous assumptions and provide insights into the complex interplay of affective responses, situated processes, and exercise choices. The dissertation underscores the need for individualized interventions that manipulate affective responses during exercise and calls for systematic testing to establish causal links to automatic affective processes and subsequent exercise behavior. This dissertation highlights the necessity for methodological and conceptual refinements in understanding and promoting exercise behavior, ultimately contributing to the broader goal of combating increasing inactivity trends.}, language = {en} } @misc{Schmidt2023, type = {Master Thesis}, author = {Schmidt, Philip}, title = {Afghanistan 2021? - Analysen und Perspektiven}, doi = {10.25932/publishup-60918}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-609183}, school = {Universit{\"a}t Potsdam}, pages = {100}, year = {2023}, abstract = {Der Einsatz in Afghanistan hat Deutschland insgesamt ca. 12 500 000 000 € gekostet und zivile und milit{\"a}rische Kr{\"a}fte 20 Jahre lang gebunden. Er endete im August des Jahres 2021 mit einem {\"u}bereilten Abzug aus Kabul und die urspr{\"u}nglich gesetzten Ziele wurden im Wesentlichen nicht erreicht. Ziel der vorliegenden Arbeit ist es, den Einsatz in Afghanistan von 2001 bis 2021 aus Sicht der BRD politikwissenschaftlich und v{\"o}lkerrechtlich aufzuarbeiten. Dazu wird folgende, {\"u}bergeordnete Forschungsfrage gestellt: Welche Lehren f{\"u}r die Außen- und Sicherheitspolitik der BRD lassen sich aus dem Einsatz in Afghanistan ziehen? Um die Forschungsfrage zu beantworten wurde ein qualitativ deduktiver Ansatz gew{\"a}hlt, der unter Zuhilfenahme von Fachliteratur sowie Expert:inneninterviews versucht, den Einsatzverlauf zu skizzieren und Lehren f{\"u}r k{\"u}nftige, vergleichbare Humanit{\"a}re Interventionen aufzuzeigen.}, language = {de} } @misc{Blaschka2023, type = {Master Thesis}, author = {Blaschka, Birk-Matti}, title = {Aggredior ad ipsum crimen magiae}, series = {Copia - Potsdamer Anregungen f{\"u}r den Lateinunterricht}, journal = {Copia - Potsdamer Anregungen f{\"u}r den Lateinunterricht}, number = {6}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2748-6621}, doi = {10.25932/publishup-57742}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-577425}, school = {Universit{\"a}t Potsdam}, pages = {84, 38}, year = {2023}, abstract = {"Aggredior ad ipsum crimen magiae." Mit diesen Worten leitet Apuleius die Widerlegung der gegen ihn gerichteten Anklage ein: Er soll die reiche Witwe Pudentilla durch Liebeszauber zu einer Heirat mit ihm veranlasst haben. Dagegen setzt er sich in seiner Verteidigungsrede "De magia" zur Wehr. Die vorliegende Arbeit soll diese spannende Rede Lateinsch{\"u}lern der gymnasialen Oberstufe durch ein Lekt{\"u}reheft bekannt machen. Letzteres ist mit kompetenzorientierten Aufgaben und einem Erwartungshorizont versehen. Es wird ferner von der wissenschaftlichen Auseinandersetzung mit den in der Rede behandelten Themen flankiert. Das Heft soll den Sch{\"u}lern einerseits die argumentative Strategie der Rede und andererseits das antike Alltagsph{\"a}nomen 'Magie' n{\"a}herbringen. Dabei tauchen sie ein in die antiken Vorstellungen von Zauberei und versuchen zugleich die einstigen Vorw{\"u}rfe der Ankl{\"a}ger zu rekonstruieren, die etwa die Suche nach bestimmten Fischarten, die Behandlung von Epilepsie oder gewisse n{\"a}chtliche Rituale betreffen. Dar{\"u}ber hinaus fragen sie nach der Unterscheidung magischer von religi{\"o}sen Praktiken und stellen dabei Bez{\"u}ge zu ihrer eigenen Lebenswelt her.}, language = {de} } @book{Lemke2023, author = {Lemke, Tristan}, title = {Aktuelle Rechtsfragen des Ortsteilrechts in Brandenburg}, series = {KWI-Diskurs}, journal = {KWI-Diskurs}, number = {1}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2941-4830}, doi = {10.25932/publishup-59189}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-591891}, publisher = {Universit{\"a}t Potsdam}, pages = {50}, year = {2023}, abstract = {Ortsteile als Untergliederungen der Gemeinden sind nicht nur f{\"u}r das Identit{\"a}tsverst{\"a}ndnis der lokalen Gemeinschaft bedeutsam, sondern auch f{\"u}r das Demokratieprinzip und die Verwirklichung der Ziele der Gebietsreform. Die Bildung von Ortsteilen unterliegt bestimmten gesetzlichen Voraussetzungen. Dabei sind drei verschiedene Ausgestaltungen m{\"o}glich: Ortsteile ohne Vertretung, Ortsteile mit Ortsbeirat und Ortsvorsteher sowie Ortsteile mit isoliertem Ortsvorsteher. Die gew{\"a}hlte Form der Ortsteilvertretung hat Auswirkungen darauf, in welchem Umfang die {\"o}rtliche Expertise in gemeindliche Entscheidungsprozesse einfließen kann und welche Entscheidungen vor Ort getroffen werden k{\"o}nnen. Dabei ist zwischen der Verpflichtung, die Ortsvertretung in bestimmten Konstellationen anzuh{\"o}ren, dem Antragsrecht der Ortsvertretung und der Entscheidungsbefugnis des Ortsbeirates zu differenzieren. Die Abgrenzung dieser organschaftlichen Rechte und ihr Umfang sind in der kommunalen Praxis konflikttr{\"a}chtig. F{\"u}r die M{\"o}glichkeiten der Ortsvertretungen, das lokale Zusammenleben zu gestalten, ist weiterhin das (mittlerweile) obligatorische Ortsteilbudget relevant, das Gegenstand der Reform der Kommunalverfassung im Juni 2021 war. Die Verwirklichung dieser materiellrechtlichen Positionen h{\"a}ngt von ihrer prozessualen Durchsetzbarkeit ab. In der Praxis rankt sich h{\"a}ufig Streit darum, ob Eingemeindungsvertr{\"a}ge und die in ihnen get{\"a}tigten Versprechen (noch) verbindlich sind. Diejenigen, die als Mitglieder des Ortsbeirates bzw. als Ortsvorsteher der {\"o}rtlichen Gemeinschaft einen wichtigen und zeitintensiven Dienst erweisen, k{\"o}nnen eine angemessene Aufwandsentsch{\"a}digung erhalten.}, language = {de} } @article{Knobloch2023, author = {Knobloch, Eberhard}, title = {Alexander von Humboldts Naturgem{\"a}lde der Anden}, series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, volume = {XXIV}, journal = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, number = {47}, editor = {Ette, Ottmar and Knobloch, Eberhard}, issn = {2568-3543}, doi = {10.18443/360}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-617900}, pages = {109 -- 122}, year = {2023}, abstract = {Redaktionelle Bearbeitung: Ulrich P{\"a}ßler und Ingo Schwarz}, language = {de} } @article{Knobloch2023, author = {Knobloch, Eberhard}, title = {Alexander von Humboldts unbekannter Briefwechsel mit Ludwig August von Buch}, series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, volume = {XXIV}, journal = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, number = {47}, editor = {Ette, Ottmar and Knobloch, Eberhard}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2568-3543}, doi = {10.18443/358}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-616642}, pages = {5 -- 13}, year = {2023}, abstract = {Alexander von Humboldt f{\"u}hrte einen bisher v{\"o}llig unbekannten Briefwechsel mit Ludwig August von Buch, einem Neffen des ber{\"u}hmten Geologen Leopold von Buch. Die drei in franz{\"o}sischer Sprache verfassten und in Rom aufbewahrten Briefe werden zum ersten Mal publiziert. Sie berichten insbesondere {\"u}ber interessante Details von Humboldts Russland-Reise und enthalten ein Empfehlungsschreiben f{\"u}r den Offizier und Historiker Leopold von Orlich.}, language = {de} } @article{MientusWulffNowaketal.2023, author = {Mientus, Lukas and Wulff, Peter and Nowak, Anna and Borowski, Andreas}, title = {Algorithmen als Dozierende?}, series = {PSI-Potsdam: Ergebnisbericht zu den Aktivit{\"a}ten im Rahmen der Qualit{\"a}tsoffensive Lehrerbildung (2019-2023) (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 3)}, journal = {PSI-Potsdam: Ergebnisbericht zu den Aktivit{\"a}ten im Rahmen der Qualit{\"a}tsoffensive Lehrerbildung (2019-2023) (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 3)}, number = {3}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-568-2}, issn = {2626-3556}, doi = {10.25932/publishup-61640}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-616407}, pages = {117 -- 129}, year = {2023}, abstract = {Auf maschinellem Lernen basierende Tools haben schon l{\"a}ngst Einzug in unseren Alltag gefunden und so konnten auch in der Lehrkr{\"a}ftebildung erste Anwendungen entwickelt, erprobt und evaluiert werden. Im Teilprojekt Physikdidaktik des Schwerpunktes 2 „Schulpraktische Studien" wurden auf Basis eines Rahmenmodells f{\"u}r Reflexion (Nowak et al., 2019) automatisierte Analysemethoden (Wulff et al., 2020) entwickelt und fanden Einzug in universit{\"a}re fachdidaktische Lehre (Mientus et al., 2021a). Mit dem Projekt konnten Potenziale KI-basierter Unterst{\"u}tzung aufgezeigt und verstetigt sowie spezifische Herausforderungen identifiziert werden. Dieser Beitrag skizziert ausgew{\"a}hlte Anwendungsm{\"o}glichkeiten und weiterf{\"u}hrende Forschungen unter dem Gesichtspunkt der Akzeptanz computerunterst{\"u}tzter Lehre.}, language = {de} } @article{FrankenDegelingPreisfeld2023, author = {Franken, Nadine and Degeling, Maria and Preisfeld, Angelika}, title = {Am Puls der (digitalen) Zeit?}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63140}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631402}, pages = {221 -- 231}, year = {2023}, abstract = {In diesem Beitrag wird ein geplantes digitales Lehrkonzept f{\"u}r die universit{\"a}re Begleitung des Praxissemesters in den F{\"a}chern Biologie und Mathematik vorgestellt. Darin setzen sich Studierende im Praxissemester selbstst{\"a}ndig fachspezifische Schwerpunkte f{\"u}r die Planung, Durchf{\"u}hrung und Reflexion von Unterrichtsprojekten in der Schule. Optimalerweise ergibt sich aus den Unterrichtsprojekten auch eine fachbezogene Fragestellung, die von den Studierenden im Zuge Forschenden Lernens ergr{\"u}ndet werden kann. Begleitet wird der gesamte Prozess durch systematisch angeleitete E-Peer-Assessments (E-PA). Dabei treten Studierende in Peers in den digitalen, schriftlichen Dialog {\"u}ber Unterricht und durchlaufen gemeinsam Reflexions- und Feedbackschleifen, welche durch die universit{\"a}re Seminarleitung instruiert werden.}, language = {de} } @article{HaugsbakkenHagelia2023, author = {Haugsbakken, Halvdan and Hagelia, Marianne}, title = {An asynchronous cooperative leaning design in a Small Private Online Course (SPOC)}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62210}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-622107}, pages = {67 -- 76}, year = {2023}, abstract = {This short paper sets out to propose a novel and interesting learning design that facilitates for cooperative learning in which students do not conduct traditional group work in an asynchronous online education setting. This learning design will be explored in a Small Private Online Course (SPOC) among teachers and school managers at a teacher education. Such an approach can be made possible by applying specific criteria commonly used to define collaborative learning. Collaboration can be defined, among other things, as a structured way of working among students that includes elements of co-laboring. The cooperative learning design involves adapting various traditional collaborative learning approaches for use in an online learning environment. A critical component of this learning design is that students work on a self-defined case project related to their professional practices. Through an iterative process, students will receive ongoing feedback and formative assessments from instructors and follow students at specific points, meaning that co-constructing of knowledge and learning takes place as the SPOC progresses. This learning design can contribute to better learning experiences and outcomes for students, and be a valuable contribution to current research discussions on learning design in Massive Open Online Courses (MOOCs).}, language = {en} } @article{ConciaDistlerLawetal.2023, author = {Concia, Francesca and Distler, Petr and Law, Gareth and Macerata, Elena and Mariani, Mario and Mossini, Eros and Negrin, Maddalena and Štrok, Marko}, title = {An experience in developing models to use MOOCs in teaching and to advocate OERs}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62460}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624609}, pages = {239 -- 254}, year = {2023}, abstract = {Loss of expertise in the fields of Nuclear- and Radio-Chemistry (NRC) is problematic at a scientific and social level. This has been addressed by developing a MOOC, in order to let students in scientific matters discover all the benefits of NRC to society and improving their awareness of this discipline. The MOOC "Essential Radiochemistry for Society" includes current societal challenges related to health, clean and sustainable energy for safety and quality of food and agriculture. NRC teachers belonging to CINCH network were invited to use the MOOC in their teaching, according to various usage models: on the basis of these different experiences, some usage patterns were designed, describing context characteristics (number and age of students, course), activities' scheduling and organization, results and students' feedback, with the aim of encouraging the use of MOOCs in university teaching, as an opportunity for both lecturers and students. These models were the basis of a "toolkit for teachers". By experiencing digital teaching resources created by different lecturers, CINCH teachers took a first meaningful step towards understanding the worth of Open Educational Resources (OER) and the importance of their creation, adoption and sharing for knowledge progress. In this paper, the entire path from MOOC concept to MOOC different usage models, to awareness-raising regarding OER is traced in conceptual stages.}, language = {en} } @phdthesis{Heinze2023, author = {Heinze, Peter Eric}, title = {An exploration of activity and therapist preferences and their predictors in German-speaking samples}, doi = {10.25932/publishup-60753}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-607534}, school = {Universit{\"a}t Potsdam}, pages = {195}, year = {2023}, abstract = {According to current definitions of evidence-based practice, patients' preferences play an important role for the psychotherapeutic process and outcomes. However, whereas a significant body of research investigated preferences regarding specific treatments, research on preferred activities or therapist characteristics is rare, investigated heterogeneous aspects with inconclusive results, lacked validated assessment tools, and neglected relevant preferences, their predictors as well as the perspective of mental health professionals. Therefore, the three studies of this dissertation aimed to address the most fundamental drawbacks in current preference research by providing a validated questionnaire, focus efforts on activity and therapist preferences and add preferences of psychotherapy trainees. To this end, Paper I reports the translation and validation of the 18-item Cooper-Norcross Inventory of Preference (C-NIP) in a broad, heterogeneous sample of N = 969 laypeople, resulting in good to acceptable reliabilities and first evidence of validity. However, the original factor structure was not replicated. Paper II assesses activity preferences of psychotherapists in training using the C-NIP and compares them with the initial laypeople sample. There were significant differences between both samples, with trainees preferring a more patient-directed, emotionally intense and confrontational approach than laypeople. CBT trainees preferred a more therapist-directed, present-focused, challenging and less emotional intense approach than psychodynamic or -analytic trainees. Paper III explores therapist preferences and tests predictors for specific preference choices. For most characteristics, more than half of the participants did not have specific preferences. Results pointed towards congruency effects (i.e., preference for similar characteristics), especially for members of marginalized groups. The dissertation provides both researchers and practitioners with a validated questionnaire, shows potentially obstructive differences between patients and therapists and underlines the importance of therapist characteristics for marginalized groups, thereby laying the foundation for future applications and implementations in research and practice.}, language = {en} } @book{VanHalVanLoonMercelisetal.2023, author = {Van Hal, Toon and Van Loon, Zanna and Mercelis, Wouter and Steckley, John and Peetermans, Andy and Van Rooy, Raf and Dionne, Fannie}, title = {Anchored in ink}, editor = {Van Loon, Zanna and Steckley, John and Van Hal, Toon and Peetermans, Andy}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-516-3}, doi = {10.25932/publishup-51306}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-513062}, publisher = {Universit{\"a}t Potsdam}, pages = {448}, year = {2023}, abstract = {This book serves as a gateway to the Elementa grammaticae Huronicae, an eighteenth-century grammar of the Wendat ('Huron') language by Jesuit Pierre-Philippe Potier (1708-1781). The volume falls into three main parts. The first part introduces the grammar and some of its contexts, offering information about the Huron-Wendat and Wyandot, the early modern Jesuit mission in New France and the Jesuits' linguistic output. The heart of the volume is made up by its second part, a text edition of the Elementa. The third part presents some avenues of research by way of specific case studies.}, language = {en} } @article{Radtke2023, author = {Radtke, Wolfgang}, title = {Ann{\"a}herungen an Christian von Rother}, series = {Die Preußische Seehandlung zwischen Markt, Staat und Kultur : 40 Jahre Stiftung Preußische Seehandlung}, journal = {Die Preußische Seehandlung zwischen Markt, Staat und Kultur : 40 Jahre Stiftung Preußische Seehandlung}, editor = {Wienfort, Monika}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-562-0}, doi = {10.25932/publishup-59987}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-599878}, pages = {53 -- 80}, year = {2023}, abstract = {Christian (von) Rother, Chef der Preußischen Seehandlung 1820-1848, ist vermutlich die pr{\"a}gendste Gestalt der Institution im 19. Jahrhundert. Seine Lebensgeschichte als Sohn eines schlesischen Bauern zeugt von sozialem Aufstieg und einer eindrucksvollen Beamtenkarriere. Rother formte die Seehandlung zu einem Konglomerat von gewerblichen Unternehmen, die durch Bankengesch{\"a}fte, Chausseebauprogramme und das Engagement des Staates in der Wirtschaftsf{\"o}rderung leistungsstark gemacht werden sollten. Der Erfolg blieb allerdings unterschiedlich. In den 1840er Jahren stießen diese Bem{\"u}hungen dar{\"u}ber hinaus auf Kritik von unternehmerischen Konkurrenten. Bleibende Bedeutung behauptete eine von Rother gegr{\"u}ndete soziale Einrichtung, die in Berlin ans{\"a}ssige Rother-Stiftung f{\"u}r arme und unverheiratete T{\"o}chter von Beamten und Offizieren.}, language = {de} } @phdthesis{Grduszak2023, author = {Grduszak, Denise}, title = {Anschaulichkeiten herstellen}, doi = {10.25932/publishup-61229}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-612292}, school = {Universit{\"a}t Potsdam}, pages = {280}, year = {2023}, abstract = {Die Handschrift D der Driu liet von der maget entstand um 1220 und ist die {\"a}lteste vollst{\"a}ndige erhaltene Fassung des Textes. Priester Wernher gilt als Verfasser der geistlichen Dichtung und erstellt sie im Jahr 1172 auf der Grundlage apokrypher und biblischer Quellen. Die Handschrift D wird in der medi{\"a}vistischen Germanistik gerne zu jenen Werken gez{\"a}hlt, die den Auftakt einer zunehmenden Verschriftlichung in der Volkssprache markieren. Gem{\"a}ß ihrem Erscheinungsbild erweist sich die Handschrift und der Zeitpunkt ihrer Entstehung aber vor allem als ein Wendepunkt, an dem der Einfluss der lateinischen Schriftkultur auf die Produktion volkssprachlicher Literatur besonders deutlich wird. W{\"a}hrend insgesamt der Anteil der geistlichen Dichtung kontinuierlich abnimmt, erfolgt von literaturwissenschaftlicher Seite zurecht auch die Einordnung der Handschrift in die weltlich-laikale Hofliteratur. In diesem Kontext steht die Handschrift D aber nicht am Beginn einer Bl{\"u}tezeit, sondern weist vor allem in das bl{\"u}hende Spannungsfeld zwischen der lateinisch gepr{\"a}gten Buchproduktion und der geistlichen Dichtung auf der einen und dem Anspruch einer laikalen Rezeptionsgemeinschaft auf der anderen Seite. In diesem Feld bewegt sich meine medienanthropologische Untersuchung. Die Schwerpunkte liegen hierbei auf der Rekonstruktion der Handschriftenherstellung sowie auf der Analyse der Darstellungsprinzipien im Bildprogramm.}, language = {de} } @misc{IlicicWoodhouseKarstenetal.2023, author = {Ilicic, Doris and Woodhouse, Jason Nicholas and Karsten, Ulf and Zimmermann, Jonas and Wichard, Thomas and Quartino, Maria Liliana and Campana, Gabriela Laura and Livenets, Alexandra and Van den Wyngaert, Silke and Grossart, Hans-Peter}, title = {Antarctic Glacial Meltwater Impacts the Diversity of Fungal Parasites Associated With Benthic Diatoms in Shallow Coastal Zones}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {1290}, issn = {1866-8372}, doi = {10.25932/publishup-57289}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-572895}, pages = {14}, year = {2023}, abstract = {Aquatic ecosystems are frequently overlooked as fungal habitats, although there is increasing evidence that their diversity and ecological importance are greater than previously considered. Aquatic fungi are critical and abundant components of nutrient cycling and food web dynamics, e.g., exerting top-down control on phytoplankton communities and forming symbioses with many marine microorganisms. However, their relevance for microphytobenthic communities is almost unexplored. In the light of global warming, polar regions face extreme changes in abiotic factors with a severe impact on biodiversity and ecosystem functioning. Therefore, this study aimed to describe, for the first time, fungal diversity in Antarctic benthic habitats along the salinity gradient and to determine the co-occurrence of fungal parasites with their algal hosts, which were dominated by benthic diatoms. Our results reveal that Ascomycota and Chytridiomycota are the most abundant fungal taxa in these habitats. We show that also in Antarctic waters, salinity has a major impact on shaping not just fungal but rather the whole eukaryotic community composition, with a diversity of aquatic fungi increasing as salinity decreases. Moreover, we determined correlations between putative fungal parasites and potential benthic diatom hosts, highlighting the need for further systematic analysis of fungal diversity along with studies on taxonomy and ecological roles of Chytridiomycota.}, language = {en} } @article{Petersen2023, author = {Petersen, Jens}, title = {Anthropozentrik und {\"O}kozentrik im Umweltrecht}, series = {Studien zur juristischen Ideengeschichte}, journal = {Studien zur juristischen Ideengeschichte}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-543-9}, doi = {10.25932/publishup-60430}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-604303}, pages = {149 -- 160}, year = {2023}, language = {de} } @phdthesis{JimenezAlvaro2023, author = {Jim{\´e}nez {\´A}lvaro, Eliana}, title = {An{\´a}lisis neotect{\´o}nico y lito-tefroestratigr{\´a}fico de los grandes movimientos en masa asociados al fallamiento activo de la cuenca intermontana Quito-Guayllabamba, Ecuador}, doi = {10.25932/publishup-62220}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-622209}, school = {Universit{\"a}t Potsdam}, pages = {195}, year = {2023}, abstract = {Within the Quito-Guayllabamba intermontane basin of Ecuador, five unusually large colluvial deposits of ancient landslides have been identified and analyzed in this study. The voluminous rotational MM-5 Guayllabamba landslide is the largest one, with a volume of 1183 million m3. The mega debris-avalanches MM-1 Conocoto, MM-3 Oyacoto, and MM-4 San Francisco were originally triggered by an initial rupture that was associated with a rotational landslide, the corresponding deposits have volumes between 399 to 317 million m3. Finally, the deposit with the smallest volume, the MM-2 Bat{\´a}n rotational landslide and debris fall, has a volume of 8,7 million m3. In this thesis, a detailed study of these large mass movements was carried out using neotectonic and litho-tephrostratigraphic methods to understand the geological and geomorphological boundary conditions that might have been relevant for triggering such mass movements. The neotectonic part of the study was based on the qualitative and quantitative geomorphic analysis of these large mass-movement deposits through the structural characterization of anticlines located east of the Quito sub-basin and their collapsed flanks that constitute the break-off areas. This part of the analysis was furthermore supported by the application of different morphometric indices to reveal tectonically forced landscape evolution processes that may have aided mass-movement generation. The litho-tephrostratigraphic part of the study was based on the analysis of petrographic, geochemical, and geochronological characteristics of soil horizons and intercalated volcanic ashes with the aim to constrain the timing of individual mass-movement events and their potential correlation. The results were integrated into chronostratigraphic schemes using break-off surfaces, cross-cutting and superposition relationships of landslide deposits and subsequently deposited strata to understand the mass movements in the tectonic and temporal context of the intermontane basin setting, as well as to identify the triggering mechanisms for each event. The MM-5 Guayllabamba mass movement is the result of the collapse of the southwestern slope of the Mojanda volcano and was triggered by the interaction of geologic and morphologic conditions approximately 0,81 Ma. The first debris-avalanche episode of the MM-3 Oyacoto and MM-4 San Francisco mass movements could be related to both geological and morphological conditions, given the highly fractured rocks and uplift of the Bellavista-Catequilla anticline that was subsequently incised at the foot of the slope by fluvial erosion. This first episode of collapse most likely occurred around 0,8 Ma. The MM-2 Bat{\´a}n mass movement was possibly also facilitated by a combination of geological and morphological conditions, most likely associated with a reduction in the lithostatic stresses affecting the Chiche and Mach{\´a}ngara formations and an increase of shear stresses during lateral fluvial scouring processes at the flanks of the source areas. This points to a linked process between river erosion and uplift processes associated with the evolution of the El Bat{\´a}n-La Bota anticline that could have occurred between 0,5 and 0,25 Ma. The voluminous MM-1 Conocoto debris avalanche, as well as the second debris avalanche episode that generated the MM-3 Oyacoto and MM-4 San Francisco mass movements, were caused by the gravitational collapse of the Mojanda and Cangahua formations that are characterized by the intercalation of volcanic ashes. The failure of the eastern flank of the anticlines probably was associated with increased available humidity related to regional Holocene climatic variations. The results of paleosol chronology combined with regional chronostratigraphic and paleoclimate data suggests that these debris avalanches were triggered between 5 and 4 ka. Active tectonics has shaped the morphological features of the Quito-Guayllabamba intermontane basin. The triggering of mass movements in this environment is associated with failure of Pleistocene lithologies (lake sediments, alluvial and volcanic deposits) subjected to ongoing deformation processes, seismic activity, and superposed episodes of climate variability. The Metropolitan District of Quito is an integral part of this complex environment and the geological, climatic, and topographic conditions that continue to influence the urban geographic space within this intermontane basin. The city of Quito comprises the area with the largest urban consolidation including the sub-basins of Quito and San Antonio, with a population of 2,872 million inhabitants, reflecting the importance of studying the inherent geological and climatic hazards that this region is confronted with.}, language = {es} } @article{Siegeris2023, author = {Siegeris, Juliane}, title = {Attracting a new clientele for computer science with a women-only IT degree course}, series = {Hochschuldidaktik Informatik HDI 2021 (Commentarii informaticae didacticae)}, journal = {Hochschuldidaktik Informatik HDI 2021 (Commentarii informaticae didacticae)}, number = {13}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-548-4}, issn = {1868-0844}, doi = {10.25932/publishup-61571}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-615712}, pages = {157 -- 170}, year = {2023}, abstract = {A degree course in IT and business administration solely for women (FIW) has been offered since 2009 at the HTW Berlin - University of Applied Sciences. This contribution discusses student motivations for enrolling in such a women only degree course and gives details of our experience over recent years. In particular, the approach to attracting new female students is described and the composition of the intake is discussed. It is shown that the women-only setting together with other factors can attract a new clientele for computer science.}, language = {en} } @phdthesis{Kambasu2023, author = {Kambasu, Obed}, title = {Attractiveness of government as an employer: The paradox of industrial action and public service attractiveness}, doi = {10.25932/publishup-57654}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-576542}, school = {Universit{\"a}t Potsdam}, pages = {xiii, 182, xxxi}, year = {2023}, abstract = {This research investigated the relationship between frequent engagement in industrial action (also known as 'employee strikes') and the internal attractiveness of government employment. It focused on a special group of public employees: public university lecturers and public-school teachers in Uganda who frequently engaged in industrial action. At the very basic level, the research explored whether public employees frequently engaged in industrial action because they considered public service employment to be unattractive or whether frequent engagement in industrial action was in fact part of the attractiveness of government employment. Beyond exploring these relationships, it also explained why (or why not) such relationships existed. Methodologically, the research was conducted using an exploratory sequential design - a mixed methods study design that starts with a qualitative followed by a quantitative phase. It is the results of the initial qualitative phase that determined the direction of the subsequent quantitative phase. The qualitative phase started with an exploration of the relationship between industrial action and internal public service attractiveness, resulting into two specific research questions: 1) Why do public employees engage in industrial action and what role does frequent engagement in industrial action play in their perception of public service attractiveness? 2) Why and how is organizational justice related to public employees' perception of public service attractiveness? The above questions were answered both qualitatively and quantitatively. The theoretical postulations of the Social Movements Theories, Social Exchange Theory, and the Signaling Theory were used to structure the research assumptions and hypotheses. The results showed that public employees engaged in industrial action mostly because of relative, rather than absolute deprivation. An established culture of workplace militancy was also found to be key in actualizing industrial action as was the (perceived) absence of alternatives to achieve workplace justice. Importantly, there was a clear dichotomy between absolute working conditions and frequent engagement in industrial action. Frequent engagement in industrial action was itself found to have both positive and negative effects on internal public service attractiveness. It was also found that public service attractiveness from the perspective of current public employees might be different from what it is from the perspective of prospective employees. This is because current public employees do not assume what it feels like to work for government, but mostly use their day-to-day lived experiences to judge the attractiveness of their employer. The existing literature is particularly deficient on analyzing public service attractiveness from an internal perspective, which is surprising given the public sector's high reliance on internal recruitment. The research results underlined key implications for theory, practice, and research. At theory level, the results suggested that public employee ratings of internal public service attractiveness were heavily affected by halo effects and should therefore not be taken at face value. The complex workplace social exchanges which are deeply rooted in organizational justice and the 'personification metaphor' were also emphasized. From an empirical perspective, the results underlined the need to prioritize internal public service attractiveness as recent research has confirmed the value of family socialization and internal recommendations in making public sector employment attractive, even to external applicants. This research argues that the centrality of organizational justice in public sector employee relations requires public sector organizations to be intentional in their bid to create fair, just, and attractive workplaces. Beyond assessing the fairness of personnel policies, procedures, and interactional relationships, it is also important to prepare and equip public managers with the right skills to promote and practice justice in their day-to-day interactions with public employees, and to encourage, improve, and facilitate alternative public employee feedback mechanisms.}, language = {en} } @article{OetkenGorski2023, author = {Oetken, Mandy and Gorski, Sebastian}, title = {Aufbau eines integrierten Pilotstudiengangs im gewerblich-technischen Lehramt f{\"u}r die Mangelf{\"a}cher Metall- und Elektrotechnik}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63144}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631440}, pages = {249 -- 257}, year = {2023}, abstract = {Im beruflichen Lehramt bilden sowohl der Mangel an Studierenden als auch hohe Abbruchquoten bzw. die Abwanderung in Unternehmen eine permanente Herausforderung, der im Rahmen des Projekts „FACE - Berufliches Lehramt" (gef{\"o}rdert im Kontext der 3. Phase der Qualit{\"a}tsoffensive Lehrerbildung) mit unterschiedlichen Maßnahmen begegnet werden soll. Die Entwicklungs- und Unterst{\"u}tzungsmaßnahmen im gewerblich-technischen Lehramt am Standort Freiburg fokussieren insbesondere die Aspekte Koh{\"a}renz und Professionsorientierung - zuk{\"u}nftig forciert durch studentische Reflexionsprozesse. Diese werden durch die Entwicklung eines Pilotstudiengangs erg{\"a}nzt, welcher eine 52-w{\"o}chige betriebliche Praxis auf Facharbeiterebene (Facharbeiterbrief) in das Studium integriert. Dar{\"u}ber hinaus finden Facetten von Heterogenit{\"a}t/Inklusion und Deutsch als Zweitsprache/Deutsch als Fremdsprache (DaZ/DaF) als Querschnittskompetenzen Eingang in das Studium. Die in allen Bereichen erworbenen Handlungskompetenzen werden in den Schulpraxisphasen erprobt und anschließend kritisch-konstruktiv in Reflexionsseminaren aufgearbeitet. Im folgenden Beitrag soll kurz auf die Entstehung des Pilotstudiengangs unter reflexiven Aspekten eingegangen werden.}, language = {de} } @article{BaberowskiLeonhardtRentschetal.2023, author = {Baberowski, David and Leonhardt, Thiemo and Rentsch, Susanne and Bergner, Nadine}, title = {Aufbau informatischer Kompetenzen im Kontext KI bei Lehramtsstudierenden des Faches Politik}, series = {Hochschuldidaktik Informatik HDI 2021 (Commentarii informaticae didacticae)}, journal = {Hochschuldidaktik Informatik HDI 2021 (Commentarii informaticae didacticae)}, number = {13}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-548-4}, issn = {1868-0844}, doi = {10.25932/publishup-61599}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-615995}, pages = {189 -- 209}, year = {2023}, abstract = {Lehrkr{\"a}fte aller F{\"a}cher ben{\"o}tigen informatische Kompetenzen, um der wachsenden Alltagsrelevanz von Informatik und aktuell g{\"u}ltigen Lehrpl{\"a}nen gerecht zu werden. Beispielsweise verweist in Sachsen der Lehrplan f{\"u}r das Fach Gemeinschaftskunde, Rechtserziehung und Wirtschaft am Gymnasium mit dem f{\"u}r die Jahrgangsstufe 11 vorgesehenem Thema „Digitalisierung und sozialer Wandel" auf K{\"u}nstliche Intelligenz (KI) und explizit auf die Bedeutung der informatischen Bildung. Um die n{\"o}tigen informatischen Grundlagen zu vermitteln, wurde f{\"u}r Lehramtsstudierende des Faches Politik ein Workshop erarbeitet, der die Grundlagen der Funktionsweise von KI anhand von {\"u}berwachtem maschinellen Lernen in neuronalen Netzen vermittelt. Inhalt des Workshops ist es, mit Bezug auf gesellschaftliche Implikationen wie Datenschutz bei Trainingsdaten und algorithmic bias einen informierten Diskurs zu politischen Themen zu erm{\"o}glichen. Ziele des Workshops f{\"u}r Lehramtsstudierende mit dem Fach Politik sind: (1) Aufbau informatischer Kompetenzen in Bezug zum Thema KI, (2) St{\"a}rkung der Diskussionsf{\"a}higkeiten der Studierenden durch passende informatische Kompetenzen und (3) Anregung der Studierenden zum Transfer auf passende Themenstellungen im Politikunterricht. Das Evaluationskonzept umfasst eine Pre-Post-Befragung zur Zuversicht zur Vermittlungskompetenz unter Bezug auf maschinelles Lernen in neuronalen Netzen im Unterricht, sowie die Analyse einer abschließenden Diskussion. F{\"u}r die Pre-Post-Befragung konnte eine Steigerung der Zuversicht zur Vermittlungskompetenz beobachtet werden. Die Analyse der Diskussion zeigte das Bewusstsein der Alltagsrelevanz des Themas KI bei den Teilnehmenden, aber noch keine Anwendung der informatischen Inhalte des Workshops zur St{\"u}tzung der Argumente in der Diskussion.}, language = {de} } @article{KluthLemireTremblayJameyetal.2023, author = {Kluth, Alicia and Lemire-Tremblay, Marilyne and Jamey, Kevin and Dalla Bella, Simone and Falk, Simone}, title = {Auswirkungen eines nonverbalen Rhythmustrainings auf die Sprechmotorik und Sprechfl{\"u}ssigkeit bei stotternden Kindern}, series = {Spektrum Patholinguistik 16}, journal = {Spektrum Patholinguistik 16}, number = {16}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-559-0}, issn = {1866-9433}, doi = {10.25932/publishup-61349}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-613497}, pages = {135 -- 149}, year = {2023}, abstract = {Die alleinige Ursache von Stottern ist weiterhin nicht abschließend gekl{\"a}rt. Auf neurofunktioneller und -morphologischer Ebene zeigen stotternde Personen Abweichungen in den Arealen, welche nicht nur f{\"u}r die Initiierung von sprechmotorischen Programmen, sondern auch f{\"u}r die Produktion und Perzeption von musikalischen Rhythmen zust{\"a}ndig sind. Unterschiede zu fl{\"u}ssigsprechenden Personen treten jedoch nicht nur im verbalen, sondern auch im nonverbal sensomotorischen Bereich auf, was auf eine St{\"o}rung dom{\"a}nen{\"u}bergreifender auditiv-motorischer Koordinationsprozesse hindeutet. Ausgehend davon wurde in einigen Studien postuliert, dass dem St{\"o}rungsbild Stottern ein dom{\"a}nen{\"u}bergreifendes Rhythmusdefizit zugrunde liegt. Im Gegensatz zu anderen St{\"o}rungsbildern, welche auch Probleme in rhythmischen Aufgaben aufweisen, gibt es bis dato jedoch keine Intervention, welche dieses Defizit angeht. Es soll untersucht werden, ob ein nonverbales rhythmisches Training bei stotternden Kindern im Alter von zehn bis zw{\"o}lf Jahren eine Verbesserung der sensomotorischen Synchronisationsf{\"a}higkeiten zur Folge hat. Zudem soll erforscht werden, ob es Transfereffekte auf die Sprechmotorik und Sprechfl{\"u}ssigkeit gibt. F{\"u}r die vorliegende einfach verblindete Pilotstudie sollen 20 Kinder rekrutiert werden. Zehn davon werden randomisiert der Experimentalgruppe zugewiesen, welche das rhythmische Spiel Rhythm Workers {\"u}ber drei Wochen daheim auf einem Tablet spielen sollen. Die Kontrollgruppe spielt ein nicht-rhythmisches Bubble-Shooter-Spiel namens Frozen Bubble. Diese Studie k{\"o}nnte somit den Weg ebnen f{\"u}r technologieunterst{\"u}tzte Rehabilitationsmaßnahmen, welche darauf abzielen die rhythmisch-motorischen Defizite bei Stottern zu lindern.}, language = {de} } @article{Petersen2023, author = {Petersen, Jens}, title = {Baltasar Graci{\´a}ns ‚Ph{\"o}nix der Gerechtigkeit'}, series = {Studien zur juristischen Ideengeschichte}, journal = {Studien zur juristischen Ideengeschichte}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-543-9}, doi = {10.25932/publishup-60421}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-604212}, pages = {25 -- 40}, year = {2023}, language = {de} } @misc{Schachter2023, author = {Schachter, Allison}, title = {Barry Trachtenberg, The Holocaust \& the Exile of Yiddish: A History of the Algemeyne Entsiklopedye (New Brunswick, NJ: Rutgers University Press, 2022), 336 pp., \$ 37.50}, series = {PaRDeS : Journal of the Association for Jewish Studies in Germany}, journal = {PaRDeS : Journal of the Association for Jewish Studies in Germany}, number = {28}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-552-1}, issn = {1614-6492}, doi = {10.25932/publishup-58583}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-585836}, pages = {121 -- 125}, year = {2023}, language = {en} } @phdthesis{MalemShinitski2023, author = {Malem-Shinitski, Noa}, title = {Bayesian inference and modeling for point processes with applications from neuronal activity to scene viewing}, doi = {10.25932/publishup-61495}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-614952}, school = {Universit{\"a}t Potsdam}, pages = {vii, 129}, year = {2023}, abstract = {Point processes are a common methodology to model sets of events. From earthquakes to social media posts, from the arrival times of neuronal spikes to the timing of crimes, from stock prices to disease spreading -- these phenomena can be reduced to the occurrences of events concentrated in points. Often, these events happen one after the other defining a time--series. Models of point processes can be used to deepen our understanding of such events and for classification and prediction. Such models include an underlying random process that generates the events. This work uses Bayesian methodology to infer the underlying generative process from observed data. Our contribution is twofold -- we develop new models and new inference methods for these processes. We propose a model that extends the family of point processes where the occurrence of an event depends on the previous events. This family is known as Hawkes processes. Whereas in most existing models of such processes, past events are assumed to have only an excitatory effect on future events, we focus on the newly developed nonlinear Hawkes process, where past events could have excitatory and inhibitory effects. After defining the model, we present its inference method and apply it to data from different fields, among others, to neuronal activity. The second model described in the thesis concerns a specific instance of point processes --- the decision process underlying human gaze control. This process results in a series of fixated locations in an image. We developed a new model to describe this process, motivated by the known Exploration--Exploitation dilemma. Alongside the model, we present a Bayesian inference algorithm to infer the model parameters. Remaining in the realm of human scene viewing, we identify the lack of best practices for Bayesian inference in this field. We survey four popular algorithms and compare their performances for parameter inference in two scan path models. The novel models and inference algorithms presented in this dissertation enrich the understanding of point process data and allow us to uncover meaningful insights.}, language = {en} } @phdthesis{SchulzHanke2023, author = {Schulz-Hanke, Christian}, title = {BCH Codes mit kombinierter Korrektur und Erkennung}, doi = {10.25932/publishup-61794}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-617943}, school = {Universit{\"a}t Potsdam}, pages = {ii, 191}, year = {2023}, abstract = {BCH Codes mit kombinierter Korrektur und Erkennung In dieser Arbeit wird auf Grundlage des BCH Codes untersucht, wie eine Fehlerkorrektur mit einer Erkennung h{\"o}herer Fehleranzahlen kombiniert werden kann. Mit dem Verfahren der 1-Bit Korrektur mit zus{\"a}tzlicher Erkennung h{\"o}herer Fehler wurde ein Ansatz entwickelt, welcher die Erkennung zus{\"a}tzlicher Fehler durch das parallele L{\"o}sen einfacher Gleichungen der Form s_x = s_1^x durchf{\"u}hrt. Die Anzahl dieser Gleichungen ist linear zu der Anzahl der zu {\"u}berpr{\"u}fenden h{\"o}heren Fehler. In dieser Arbeit wurde zus{\"a}tzlich f{\"u}r bis zu 4-Bit Korrekturen mit zus{\"a}tzlicher Erkennung h{\"o}herer Fehler ein weiterer allgemeiner Ansatz vorgestellt. Dabei werden parallel f{\"u}r alle korrigierbaren Fehleranzahlen spekulative Fehlerkorrekturen durchgef{\"u}hrt. Aus den bestimmten Fehlerstellen werden spekulative Syndromkomponenten erzeugt, durch welche die Fehlerstellen best{\"a}tigt und h{\"o}here erkennbare Fehleranzahlen ausgeschlossen werden k{\"o}nnen. Die vorgestellten Ans{\"a}tze unterscheiden sich von dem in entwickelten Ansatz, bei welchem die Anzahl der Fehlerstellen durch die Berechnung von Determinanten in absteigender Reihenfolge berechnet wird, bis die erste Determinante 0 bildet. Bei dem bekannten Verfahren ist durch die Berechnung der Determinanten eine faktorielle Anzahl an Berechnungen in Relation zu der Anzahl zu {\"u}berpr{\"u}fender Fehler durchzuf{\"u}hren. Im Vergleich zu dem bekannten sequentiellen Verfahrens nach Berlekamp Massey besitzen die Berechnungen im vorgestellten Ansatz simple Gleichungen und k{\"o}nnen parallel durchgef{\"u}hrt werden.Bei dem bekannten Verfahren zur parallelen Korrektur von 4-Bit Fehlern ist eine Gleichung vierten Grades im GF(2^m) zu l{\"o}sen. Dies erfolgt, indem eine Hilfsgleichung dritten Grades und vier Gleichungen zweiten Grades parallel gel{\"o}st werden. In der vorliegenden Arbeit wurde gezeigt, dass sich eine Gleichung zweiten Grades einsparen l{\"a}sst, wodurch sich eine Vereinfachung der Hardware bei einer parallelen Realisierung der 4-Bit Korrektur ergibt. Die erzielten Ergebnisse wurden durch umfangreiche Simulationen in Software und Hardwareimplementierungen {\"u}berpr{\"u}ft.}, language = {de} } @article{BruechnerRiehleLeopold2023, author = {Br{\"u}chner, Melanie and Riehle, Tamara and Leopold, Bengta Marie}, title = {Benachteiligtenf{\"o}rderung in der beruflichen Bildung}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63196}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631969}, pages = {415 -- 422}, year = {2023}, abstract = {Der Berufsbildungsbericht (BMBF, 2022) verweist darauf, dass inzwischen eine Viertelmillion junger Menschen im spezifischen Ausbildungssegment „{\"U}bergangssektor" m{\"u}nden. Dazu z{\"a}hlen berufsorientierende (Aus-)Bildungsangebote, die u. a. das Nachholen eines allgemeinbildenden Schulabschlusses erm{\"o}glichen, jedoch zu keinem anerkannten Ausbildungsabschluss f{\"u}hren. Hierbei handelt es sich l{\"a}ngst nicht mehr um einen institutionell gesonderten Bereich der beruflichen Bildung, sondern i. d. R. um einen schulorganisatorisch eigenst{\"a}ndigen Bereich. Es geh{\"o}rt somit zum beruflichen Alltag von Lehrkr{\"a}ften der Beruflichen Bildung, in unterschiedlichen (Aus-)Bildungsg{\"a}ngen zu unterrichten. Diese Zielgruppe wird jedoch in der Lehrer:innenbildung kaum ber{\"u}cksichtigt und somit haben auch die Studierenden diese kaum im Blick. Das wirft die Frage auf, wie angehende Lehrkr{\"a}fte f{\"u}r die besondere Zielgruppe der benachteiligten Jugendlichen in der beruflichen Bildung und die damit verbundenen Anforderungen an eine adressatengerechte Didaktik sensibilisiert werden k{\"o}nnen ? Der Beitrag stellt sowohl den Aufbau des Seminarkonzepts sowie ausgew{\"a}hlte Ergebnisse der seminarbegleitenden Forschung vor.}, language = {de} } @techreport{Mienert2023, author = {Mienert, Navin}, title = {Bericht {\"u}ber die T{\"a}tigkeit des Menschenrechtsausschusses der Vereinten Nationen im Jahre 2022 - Teil I: Staatenberichte}, series = {MenschenRechtsMagazin}, volume = {28}, journal = {MenschenRechtsMagazin}, number = {1}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2941-1149}, doi = {10.25932/publishup-58789}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-587890}, pages = {50 -- 73}, year = {2023}, abstract = {Der Beitrag f{\"u}hrt die Berichterstattung des MenschenRechtsZentrums {\"u}ber die Arbeit des Menschenrechtsausschusses der Vereinten Nationen fort. Er thematisiert insbesondere die im Jahr 2022 erfolgten obligatorischen Staatenberichtsverfahren nach Art. 40 des Zivilpakts. Im Staatenbericht wird dargelegt, welche Maßnahmen die Vertragsstaaten zur Gew{\"a}hrleistung der Rechte des Zivilpaktes getroffen haben. Im anschließenden Verfahren werden im Rahmen eines konstruktiven Dialogs mit dem betreffenden Staat Fragen zu Problemen (List of Issues) er{\"o}rtert. Die Ergebnisse des Berichtsverfahrens fasst der Ausschuss in seinen Abschließenden Bemerkungen (Concluding Observations) zusammen. Am Ende seiner Abschließenden Bemerkungen stellt der Ausschuss einige Punkte heraus und fordert den Staat dazu auf, {\"u}ber Fortschritte in diesem Bereich nunmehr innerhalb von drei Jahren zu berichten (sog. Follow-up-Verfahren). Im Berichtszeitraum 2022 setzte sich der Ausschuss w{\"a}hrend seiner drei Sitzungen mit der Menschenrechtslage in 17 Vertragsstaaten auseinander. Thematische Schwerpunkte, die Gegenstand des Follow-up-Verfahrens wurden, bildeten F{\"a}lle von Gewalt gegen Frauen, insbesondere ein Anstieg an F{\"a}llen h{\"a}uslicher Gewalt, die Einschr{\"a}nkungen der Meinungs- sowie der Versammlungsfreiheit und rechtsstaatliche Vers{\"a}umnisse. Dar{\"u}ber hinaus wurden vielerorts die Bedingungen in Hafteinrichtungen und die Situation von Arbeitsmigrant:innen thematisiert.}, language = {de} } @techreport{Lanzl2023, author = {Lanzl, Theresa}, title = {Bericht {\"u}ber die T{\"a}tigkeit des Menschenrechtsausschusses der Vereinten Nationen im Jahre 2022 - Teil II: Individualbeschwerden}, series = {MenschenRechtsMagazin}, volume = {28}, journal = {MenschenRechtsMagazin}, number = {2}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2941-1149}, doi = {10.25932/publishup-60997}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-609971}, pages = {151 -- 169}, year = {2023}, language = {de} } @article{Collasius2023, author = {Collasius, Valerie}, title = {Berufs{\"u}bergreifende Kooperation in der ambulanten sprachtherapeutischen Praxis}, series = {Spektrum Patholinguistik 16}, journal = {Spektrum Patholinguistik 16}, number = {16}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-559-0}, issn = {1866-9433}, doi = {10.25932/publishup-61358}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-613585}, pages = {201 -- 217}, year = {2023}, abstract = {Der Sachverst{\"a}ndigenrat zur Begutachtung der Entwicklung im Gesundheitswesen forderte bereits 2007 eine verbesserte Zusammenarbeit der Gesundheitsberufe und beschreibt in seinem Gutachten „Kooperation und Verantwortung als Voraussetzung einer zielorientierten Gesundheitsversorgung" (S. 25). Mit der vorgestellten Arbeit wird untersucht, welche Modelle der berufs{\"u}bergreifenden Kooperation in der ambulanten sprachtherapeutischen Praxis Anwendung finden und wie diese Kooperationen von Sprachtherapeut*innen bewertet werden. Zu diesem Zweck wurde ein Online-Fragebogen konzipiert. Anschließend wurden die Antworten von insgesamt 30 teilnehmenden Sprachtherapeut*innen ausgewertet. Dabei wurde deutlich, dass die viel diskutierte und h{\"a}ufig geforderte interprofessionelle Zusammenarbeit in der Praxis nur selten zu finden ist. Vielmehr arbeiten die befragten Sprachtherapeut*innen nach multiprofessionellen Modellen. Es fehlen berufs{\"u}bergreifende Besprechungen, und der fachliche Austausch ist noch viel zu oft dem Engagement einzelner Personen {\"u}berlassen. Auch die Bewertung der Kooperationen zeigt Verbesserungspotenzial: Die Befragten bewerteten die Zusammenarbeit mit angrenzenden Berufsgruppen durchschnittlich als „befriedigend".}, language = {de} } @phdthesis{Courtin2023, author = {Courtin, J{\´e}r{\´e}my}, title = {Biodiversity changes in Siberia between quaternary glacial and interglacial stages}, doi = {10.25932/publishup-59584}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-595847}, school = {Universit{\"a}t Potsdam}, pages = {vi, 199}, year = {2023}, abstract = {Der vom Menschen verursachte Klimawandel wirkt sich auf die biologische Vielfalt der Erde und damit auf die {\"O}kosysteme und ihre Leistungen aus. Die {\"O}kosysteme in den hohen Breitengraden sind aufgrund der verst{\"a}rkten Erw{\"a}rmung an den Polen noch st{\"a}rker betroffen als der Rest der n{\"o}rdlichen Hemisph{\"a}re. Dennoch ist es schwierig, die Dynamik von {\"O}kosystemen in den hohen Breitengraden vorherzusagen, da die Wechselwirkungen zwischen abiotischen und biotischen Komponenten sehr komplex sind. Da die Vergangenheit der Schl{\"u}ssel zur Zukunft ist, ist die Interpretation vergangener {\"o}kologischer Ver{\"a}nderungen m{\"o}glich, um laufende Prozesse besser zu verstehen. Im Quart{\"a}r durchlief das Pleistoz{\"a}n mehrere glaziale und interglaziale Phasen, welche die {\"O}kosysteme der Vergangenheit beeinflussten. W{\"a}hrend des letzten Glazials bedeckte die pleistoz{\"a}ne Steppentundra den gr{\"o}ßten Teil der unvergletscherten n{\"o}rdlichen Hemisph{\"a}re und verschwand parallel zum Aussterben der Megafauna am {\"U}bergang zum Holoz{\"a}n (vor etwa 11 700 Jahren). Der Ursprung des R{\"u}ckgangs der Steppentundra ist nicht gut erforscht, und die Kenntnis {\"u}ber die Mechanismen, die zu den Ver{\"a}nderungen in den vergangenen Lebensgemeinschaften und {\"O}kosystemen gef{\"u}hrt haben, ist von hoher Priorit{\"a}t, da sie wahrscheinlich mit denen vergleichbar sind, die sich auf moderne {\"O}kosysteme auswirken. Durch die Entnahme von See- oder Permafrostkernsedimenten kann die vergangene Artenvielfalt an den {\"U}berg{\"a}ngen zwischen Eis- und Zwischeneiszeiten untersucht werden. Sibirien und Beringia waren der Ursprung der Ausbreitung der Steppentundra, weshalb die Untersuchung dieses Gebiets hohe Priorit{\"a}t hat. Bis vor kurzem waren Makrofossilien und Pollen die g{\"a}ngigsten Methoden. Sie dienen der Rekonstruktion vergangener Ver{\"a}nderungen in der Zusammensetzung der Bev{\"o}lkerung, haben aber ihre Grenzen und Schw{\"a}chen. Seit Ende des 20. Jahrhunderts kann auch sediment{\"a}re alte DNA (sedaDNA) untersucht werden. Mein Hauptziel war es, durch den Einsatz von sedaDNA-Ans{\"a}tzen wissenschaftliche Beweise f{\"u}r Ver{\"a}nderungen in der Zusammensetzung und Vielfalt der {\"O}kosysteme der n{\"o}rdlichen Hemisph{\"a}re am {\"U}bergang zwischen den quart{\"a}ren Eiszeiten und Zwischeneiszeiten zu liefern. In dieser Arbeit liefere ich Momentaufnahmen ganzer alter {\"O}kosysteme und beschreibe die Ver{\"a}nderungen in der Zusammensetzung zwischen Quart{\"a}rglazialen und Interglazialen und best{\"a}tige die Vegetationszusammensetzung sowie die r{\"a}umlichen und zeitlichen Grenzen der pleistoz{\"a}nen Steppentundra. Ich stelle einen allgemeinen Verlust der Pflanzenvielfalt fest, wobei das Aussterben der Pflanzen parallel zum Aussterben der Megafauna verlief. Ich zeige auf, wie der Verlust der biotischen Widerstandsf{\"a}higkeit zum Zusammenbruch eines zuvor gut etablierten Systems f{\"u}hrte, und diskutiere meine Ergebnisse im Hinblick auf den laufenden Klimawandel. Mit weiteren Arbeiten zur Eingrenzung von Verzerrungen und Grenzen kann sedaDNA parallel zu den etablierteren Makrofossilien- und Pollenans{\"a}tzen verwendet werden oder diese sogar ersetzen, da meine Ergebnisse die Robustheit und das Potenzial von sedaDNA zur Beantwortung neuer pal{\"a}o{\"o}kologischer Fragen wie Ver{\"a}nderungen der Pflanzenvielfalt und -verluste belegen und Momentaufnahmen ganzer alter Biota liefern.}, language = {en} } @phdthesis{Nomosatryo2023, author = {Nomosatryo, Sulung}, title = {Biogeochemical characteristics of a tropical lake}, doi = {10.25932/publishup-59400}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-594006}, school = {Universit{\"a}t Potsdam}, pages = {xix, 175}, year = {2023}, abstract = {Biogeochemical analyses of lacustrine environments are well-established methods that allow exploring and understanding complex systems in the lake ecosystem. However, most were conducted in temperate lakes controlled by entirely different physical conditions than in tropical climates. The most important difference between the temperate and tropical lakes is lacking seasonal temperature fluctuations in the latter, which leads to a stable temperature gradient in the water column. Thus, the water column in tropical latitudes generally is void of perturbations that can be seen in their temperate counterparts. Permanent stratification in the water column provides optimal conditions for intact sedimentation. The geochemical processes in the water column and the weathering process in the distinct lithology in the catchment leads to the different biogeochemical characteristic in the sediment. Conducting a biogeochemical study in this lake sediment, especially in the Sediment Water Interface (SWI) helps reveal the sedimentation and diagenetic process records influenced by the internal or external loading. Lake Sentani, the study area, is one of the thousands of lakes in Indonesia and located in the Papua province. This tropical lake has a unique feature, as it consists of four interconnected sub-basins with different water depths. More importantly, its catchment is comprised of various different lithologies. Hence, its lithological characteristics are highly diverse, and range from mafic and ultramafic rocks to clastic sediment and carbonates. Each sub-basin receives a distinct sediment input. Equally important, besides the natural loading, Lake Sentani is also influenced by anthropogenic input. Previous studies have elaborated that there is an increase in population growth rate around the lake which has direct consequences on eutrophication. Considering these factors, the government of The Republic of Indonesia put Lake Sentani on the list of national priority lakes for restoration. This thesis aims to develop a fundamental understanding of Lake Sentani's sedimentary geochemistry and geomicrobiology with a special focus on the effects of different lithologies and anthropogenic pressures in the catchment area. We conducted geochemical and geomicrobiology research on Lake Sentani to meet this objective. We investigated geochemical characteristics in the water column, porewater, and sediment core of the four sub-basins. Additional to direct investigations of the lake itself, we also studied the sediments in the tributary rivers, of which some are ephemeral, as well as the river mouths, as connections between riverine and the lacustrine habitat. The thesis is composed of three main publications about Lake Sentani and supported by several publications that focus on other tropical lakes in Indonesia. The first main publication investigates the geochemical characterization of the water column, porewater, and surface sediment (upper 40-50 cm) from the center of the four sub-basins. It reveals that besides catchment lithology, the water column heavily influences the geochemical characteristics in the lake sediments and their porewater. The findings indicate that water column stratification has a strong influence on overall chemistry. The four sub-basins are very different with regard to their water column chemistry. Based on the physicochemical profiles, especially dissolved oxygen, one sub-basin is oxygenated, one intermediate i.e. just reaches oxygen depletion at the sediment-water interface, and two sub-basins are fully meromictic. However, all four sub-basins share the same surface water chemistry. The structure of the water column creates differences on the patterns of anions and cations in the porewater. Likewise, the distinct differences in geochemical composition between the sub-basins show that the lithology in the catchment affects the geochemical characteristic in the sediment. Overall, water column stratification and particularly bottom water oxygenation strongly influence the overall elemental composition of the sediment and porewater composition. The second publication reveals differences in surface sediment composition between habitats, influenced by lithological variations in the catchment area. The macro-element distribution shows that the geochemical characteristics between habitats are different. Furthermore, the geochemical composition also indicates a distinct distribution between the sub-basins. The geochemical composition of the eastern sub-basin suggests that lithogenic elements are more dominant than authigenic elements. This is also supported by sulfide speciation, particle distribution, and smear slide data. The third publication is a geomicrobiological study of the surface sediment. We compare the geochemical composition of the surface sediment and its microbiological composition and compare the different signals. Next Generation Sequencing (NGS) of the 16S rRNA gene was applied to determine the microbial community composition of the surface sediment from a great number of locations. We use a large number of sampling sites in all four sub-basins as well as in the rivers and river mouths to illustrate the links between the river, the river mouth, and the lake. Rigorous assessment of microbial communities across the diverse Lake Sentani habitats allowed us to study some of these links and report novel findings on microbial patterns in such ecosystems. The main result of the Principal Coordinates Analysis (PCoA) based on microbial community composition highlighted some commonalities but also differences between the microbial community analysis and the geochemical data. The microbial community in rivers, river mouths and sub-basins is strongly influenced by anthropogenic input from the catchment area. Generally, Bacteroidetes and Firmicutes could be an indicator for river sediments. The microbial community in the river is directly influenced by anthropogenic pressure and is markedly different from the lake sediment. Meanwhile, the microbial community in the lake sediment reflects the anoxic environment, which is prevalent across the lake in all sediments below a few mm burial depth. The lake sediments harbour abundant sulfate reducers and methanogens. The microbial communities in sediments from river mouths are influenced by both rivers and lake ecosystems. This study provides valuable information to understand the basic processes that control biogeochemical cycling in Lake Sentani. Our findings are critical for lake managers to accurately assess the uncertainties of the changing environmental conditions related to the anthropogenic pressure in the catchment area. Lake Sentani is a unique study site directly influenced by the different geology across the watershed and morphometry of the four studied basins. As a result of these factors, there are distinct geochemical differences between the habitats (river, river mouth, lake) and the four sub-basins. In addition to geochemistry, microbial community composition also shows differences between habitats, although there are no obvious differences between the four sub-basins. However, unlike sediment geochemistry, microbial community composition is impacted by human activities. Therefore, this thesis will provide crucial baseline data for future lake management.}, language = {en} } @misc{QuarmbyMoennigMugeleetal.2023, author = {Quarmby, Andrew James and M{\"o}nnig, Jamal and Mugele, Hendrik and Henschke, Jakob and Kim, MyoungHwee and Cassel, Michael and Engel, Tilman}, title = {Biomechanics and lower limb function are altered in athletes and runners with achilles tendinopathy compared with healthy controls: A systematic review}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {830}, issn = {1866-8364}, doi = {10.25932/publishup-58760}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-587603}, pages = {20}, year = {2023}, abstract = {Achilles tendinopathy (AT) is a debilitating injury in athletes, especially for those engaged in repetitive stretch-shortening cycle activities. Clinical risk factors are numerous, but it has been suggested that altered biomechanics might be associated with AT. No systematic review has been conducted investigating these biomechanical alterations in specifically athletic populations. Therefore, the aim of this systematic review was to compare the lower-limb biomechanics of athletes with AT to athletically matched asymptomatic controls. Databases were searched for relevant studies investigating biomechanics during gait activities and other motor tasks such as hopping, isolated strength tasks, and reflex responses. Inclusion criteria for studies were an AT diagnosis in at least one group, cross-sectional or prospective data, at least one outcome comparing biomechanical data between an AT and healthy group, and athletic populations. Studies were excluded if patients had Achilles tendon rupture/surgery, participants reported injuries other than AT, and when only within-subject data was available.. Effect sizes (Cohen's d) with 95\% confidence intervals were calculated for relevant outcomes. The initial search yielded 4,442 studies. After screening, twenty studies (775 total participants) were synthesised, reporting on a wide range of biomechanical outcomes. Females were under-represented and patients in the AT group were three years older on average. Biomechanical alterations were identified in some studies during running, hopping, jumping, strength tasks and reflex activity. Equally, several biomechanical variables studied were not associated with AT in included studies, indicating a conflicting picture. Kinematics in AT patients appeared to be altered in the lower limb, potentially indicating a pattern of "medial collapse". Muscular activity of the calf and hips was different between groups, whereby AT patients exhibited greater calf electromyographic amplitudes despite lower plantar flexor strength. Overall, dynamic maximal strength of the plantar flexors, and isometric strength of the hips might be reduced in the AT group. This systematic review reports on several biomechanical alterations in athletes with AT. With further research, these factors could potentially form treatment targets for clinicians, although clinical approaches should take other contributing health factors into account. The studies included were of low quality, and currently no solid conclusions can be drawn.}, language = {en} } @phdthesis{Soltani2023, author = {Soltani, Ouad}, title = {BLF1-Mode of Action in Barley Leaf Size Control}, doi = {10.25932/publishup-60705}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-607054}, school = {Universit{\"a}t Potsdam}, pages = {110}, year = {2023}, abstract = {Establishment of final leaf size in plants represents a complex mechanism that relies on the precise regulation of two interconnected cellular processes, cell division and cell expansion. In previous work, the barley protein BROAD LEAF1 (BLF1) was identified as a novel negative regulator of cell proliferation, that mainly limits leaf growth in the width direction. Here I identified a novel RING/U-box protein that interacts with BLF1 through a yeast two hybrid screen. Using BiFC, Co-IP and FRET I confirmed the interaction of the two proteins in planta. Enrichment of the BLF1-mEGFP fusion protein and the increase of the FRET signal upon MG132 treatment of tobacco plants, together with an in vivo ubiquitylation assay in bacteria, confirmed that the RING/U-box E3 interacts with BLF1 to mediate its ubiquitylation and degradation by the 26S proteasome system. Consistent with regulation of endogenous BLF1 in barley by proteasomal degradation, inhibition of the proteasome by bortezomib treatment on BLF1-vYFP transgenic barley plants also resulted in an enrichment of the BLF1 protein. I thus demonstrated that RING/U-box E3 is colocalized with BLF1 in nuclei and negatively regulates BLF1 protein levels. Analysis of ring-e3_1 knock-out mutants suggested the involvement of the RING/U-box E3 gene in leaf growth control, although the effect was mainly on leaf length. Together, my results suggest that proteasomal degradation, possibly mediated by RING/U-box E3, contributes to fine-tuning BLF1 protein-level in barley.}, language = {en} } @phdthesis{Esen2023, author = {Esen, Cansu}, title = {Carbon nitride incorporation in polymer networks}, doi = {10.25932/publishup-57625}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-576253}, school = {Universit{\"a}t Potsdam}, pages = {xvi, 175}, year = {2023}, abstract = {The urge of light utilization in fabrication of materials is as encouraging as challenging. Steadily increasing energy consumption in accordance with rapid population growth, is requiring a corresponding solution within the same rate of occurrence speed. Therefore, creating, designing and manufacturing materials that can interact with light and in further be applicable as well as disposable in photo-based applications are very much under attention of researchers. In the era of sustainability for renewable energy systems, semiconductor-based photoactive materials have received great attention not only based on solar and/or hydrocarbon fuels generation from solar energy, but also successful stimulation of photocatalytic reactions such as water splitting, pollutant degradation and organic molecule synthesisThe turning point had been reached for water splitting with an electrochemical cell consisting of TiO2-Pt electrode illuminated by UV light as energy source rather than an external voltage, that successfully pursued water photolysis by Fujishima and Honda in 1972. Ever since, there has been a great deal of interest in research of semiconductors (e.g. metal oxide, metal-free organic, noble-metal complex) exhibiting effective band gap for photochemical reactions. In the case of environmental friendliness, toxicity of metal-based semiconductors brings some restrictions in possible applications. Regarding this, very robust and 'earth-abundant' organic semiconductor, graphitic carbon nitride has been synthesized and successfully applied in photoinduced applications as novel photocatalyst. Properties such as suitable band gap, low charge carrier recombination and feasibility for scaling up, pave the way of advance combination with other catalysts to gather higher photoactivity based on compatible heterojunction. This dissertation aims to demonstrate a series of combinations between organic semiconductor g-CN and polymer materials that are forged through photochemistry, either in synthesis or in application. Fabrication and design processes as well as applications performed in accordance to the scope of thesis will be elucidated in detail. In addition to UV light, more attention is placed on visible light as energy source with a vision of more sustainability and better scalability in creation of novel materials and solar energy based applications.}, language = {en} } @phdthesis{Galushchinskiy2023, author = {Galushchinskiy, Alexey}, title = {Carbon nitride: a flexible platform for net-oxidative and net-neutral photocatalysis}, doi = {10.25932/publishup-61092}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-610923}, school = {Universit{\"a}t Potsdam}, pages = {351}, year = {2023}, abstract = {Solar photocatalysis is the one of leading concepts of research in the current paradigm of sustainable chemical industry. For actual practical implementation of sunlight-driven catalytic processes in organic synthesis, a cheap, efficient, versatile and robust heterogeneous catalyst is necessary. Carbon nitrides are a class of organic semiconductors who are known to fulfill these requirements. First, current state of solar photocatalysis in economy, industry and lab research is overviewed, outlining EU project funding, prospective synthetic and reforming bulk processes, small scale solar organic chemistry, and existing reactor designs and prototypes, concluding feasibility of the approach. Then, the photocatalytic aerobic cleavage of oximes to corresponding aldehydes and ketones by anionic poly(heptazine imide) carbon nitride is discussed. The reaction provides a feasible method of deprotection and formation of carbonyl compounds from nitrosation products and serves as a convenient model to study chromoselectivity and photophysics of energy transfer in heterogeneous photocatalysis. Afterwards, the ability of mesoporous graphitic carbon nitride to conduct proton-coupled electron transfer was utilized for the direct oxygenation of 1,3-oxazolidin-2-ones to corresponding 1,3-oxazlidine-2,4-diones. This reaction provides an easier access to a key scaffold of diverse types of drugs and agrochemicals. Finally, a series of novel carbon nitrides based on poly(triazine imide) and poly(heptazine imide) structure was synthesized from cyanamide and potassium rhodizonate. These catalysts demonstrated a good performance in a set of photocatalytic benchmark reactions, including aerobic oxidation, dual nickel photoredox catalysis, hydrogen peroxide evolution and chromoselective transformation of organosulfur precursors. Concluding, the scope of carbon nitride utilization for net-oxidative and net-neutral photocatalytic processes was expanded, and a new tunable platform for catalyst synthesis was discovered.}, language = {en} } @phdthesis{ErbelloDoelesso2023, author = {Erbello Doelesso, Asfaw}, title = {Cenozoic magma-assisted continental rifting and crustal block rotations in an extensional overlap zone between two rift segments, Southwest Ethiopia, East Africa}, doi = {10.25932/publishup-61096}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-610968}, school = {Universit{\"a}t Potsdam}, pages = {xvii, 167}, year = {2023}, abstract = {Continental rifts are key geodynamic regions where the complex interplay of magmatism and faulting activity can be studied to understand the driving forces of extension and the formation of new divergent plate boundaries. Well-preserved rift morphology can provide a wealth of information on the growth, interaction, and linkage of normal-fault systems through time. If rift basins are preserved over longer geologic time periods, sedimentary archives generated during extensional processes may mirror tectonic and climatic influences on erosional and sedimentary processes that have varied over time. Rift basins are furthermore strategic areas for hydrocarbon and geothermal energy exploration, and they play a central role in species dispersal and evolution as well as providing or inhibiting hydrologic connectivity along basins at emerging plate boundaries. The Cenozoic East African rift system (EARS) is one of the most important continental extension zones, reflecting a range of evolutionary stages from an early rift stage with isolated basins in Malawi to an advanced stage of continental extension in southern Afar. Consequently, the EARS is an ideal natural laboratory that lends itself to the study of different stages in the breakup of a continent. The volcanically and seismically active eastern branch of the EARS is characterized by multiple, laterally offset tectonic and magmatic segments where adjacent extensional basins facilitate crustal extension either across a broad deformation zone or via major transfer faulting. The Broadly Rifted Zone (BRZ) in southern Ethiopia is an integral part of the eastern branch of the EARS; in this region, rift segments of the southern Ethiopian Rift (sMER) and northern Kenyan Rift (nKR) propagate in opposite directions in a region with one of the earliest manifestations of volcanism and extensional tectonism in East Africa. The basin margins of the Chew-Bahir Basin and the Gofa Province, characterized by a semi-arid climate and largely uniform lithology, provide ideal conditions for studying the tectonic and geomorphologic features of this complex kinematic transfer zone, but more importantly, this area is suitable for characterizing and quantifying the overlap between the propagating structures of the sMER and nKR and the resulting deformation patterns of the BRZ transfer zones. In this study, I have combined data from thermochronology, thermal modeling, morphometry, paleomagnetic analysis, geochronology, and geomorphological field observations with information from published studies to reconstruct the spatiotemporal relationship between volcanism and fault activity in the BRZ and quantify the deformation patterns of the overlapping rift segments. I present the following results: (1) new thermochronological data from the en-{\´e}chelon basin margins and footwall blocks of the rift flanks and morphometric results verified in the field to link different phases of magmatism and faulting during extension and infer geomorphological landscape features related to the current tectonic interaction between the nKR and the sMER; (2) temporally constrained paleomagnetic data from the BRZ overlap zone between the Ethiopian and Kenyan rifts to quantitatively determine block rotation between the two segments. Combining the collected data, time-temperature histories of thermal modeling results from representative samples show well-defined deformation phases between 25-20 Ma, 15-9Ma, and ~5 Ma to the present. Each deformation phase is characterized by the onset of rapid cooling (>2°C/Ma) of the crust associated with uplift or exhumation of the rift shoulder. After an initial, spatially very diffuse phase of extension, the rift has gradually evolved into a system of connected structures formed in an increasingly focused rift zone during the last 5 Ma. Regarding the morphometric analysis of the rift structures, it can be shown that normalized slope indices of the river courses, spatial arrangement of knickpoints in the river longitudinal profiles of the footwall blocks, local relief values, and the average maximum values of the slope of the river profiles indicate a gradual increase in the extension rate from north (Sawula basin: mature) to south (Chew Bahir: young). The complexity of the structural evolution of the BRZ overlap zone between nKR and sMER is further emphasized by the documentation of crustal blocks around a vertical axis. A comparison of the mean directions obtained for the Eo-Oligocene (Ds=352.6°, Is=-17.0°, N=18, α95=5.5°) and Miocene (Ds=2.9°, Is=0.9°, N=9, α95=12.4°) volcanics relative to the pole for stable South Africa and with respect to the corresponding ages of the analyzed units record a significant counterclockwise rotation of ~11.1°± 6.4° and insignificant CCW rotation of ~3.2° ± 11.5°, respectively.}, language = {en} } @article{NeuboeckLinschinger2023, author = {Neub{\"o}ck, Kristina and Linschinger, Nadine}, title = {Central elements of knowledge and competence development with MOOCs}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62466}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624668}, pages = {255 -- 262}, year = {2023}, abstract = {To implement OERs at HEIs sustainably, not just technical infrastructure is required, but also well-trained staff. The University of Graz is in charge of an OER training program for university staff as part of the collaborative project Open Education Austria Advanced (OEAA) with the aim of ensuring long-term competence growth in the use and creation of OERs. The program consists of a MOOC and a guided blended learning format that was evaluated to find out which accompanying teaching and learning concepts can best facilitate targeted competence development. The evaluation of the program shows that learning videos, self-study assignments and synchronous sessions are most useful for the learning process. The results indicate that the creation of OERs is a complex process that can be undergone more effectively in the guided program.}, language = {en} } @article{LorenzBockSchulteOstermann2023, author = {Lorenz, Anja and Bock, Stefanie and Schulte-Ostermann, Juleka}, title = {Challenges and proposals for introducing digital certificates in higher education infrastructures}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62470}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624701}, pages = {263 -- 270}, year = {2023}, abstract = {Questions about the recognition of MOOCs within and outside higher education were already being raised in the early 2010s. Today, recognition decisions are still made more or less on a case-by-case basis. However, digital certification approaches are now emerging that could automate recognition processes. The technical development of the required machinereadable documents and infrastructures is already well advanced in some cases. The DigiCerts consortium has developed a solution based on a collective blockchain. There are ongoing and open discussions regarding the particular technology, but the institutional implementation of digital certificates raises further questions. A number of workshops have been held at the Institute for Interactive Systems at Technische Hochschule L{\"u}beck, which have identified the need for new responsibilities for issuing certificates. It has also become clear that all members of higher education institutions need to develop skills in the use of digital certificates.}, language = {en} } @phdthesis{Kruse2023, author = {Kruse, Marlen}, title = {Characterization of biomolecules and their interactions using electrically controllable DNA nanolevers}, doi = {10.25932/publishup-57738}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-577384}, school = {Universit{\"a}t Potsdam}, pages = {100, xxii}, year = {2023}, abstract = {In this work, binding interactions between biomolecules were analyzed by a technique that is based on electrically controllable DNA nanolevers. The technique was applied to virus-receptor interactions for the first time. As receptors, primarily peptides on DNA nanostructures and antibodies were utilized. The DNA nanostructures were integrated into the measurement technique and enabled the presentation of the peptides in a controllable geometrical order. The number of peptides could be varied to be compatible to the binding sites of the viral surface proteins. Influenza A virus served as a model system, on which the general measurability was demonstrated. Variations of the receptor peptide, the surface ligand density, the measurement temperature and the virus subtypes showed the sensitivity and applicability of the technology. Additionally, the immobilization of virus particles enabled the measurement of differences in oligovalent binding of DNA-peptide nanostructures to the viral proteins in their native environment. When the coronavirus pandemic broke out in 2020, work on binding interactions of a peptide from the hACE2 receptor and the spike protein of the SARS-CoV-2 virus revealed that oligovalent binding can be quantified in the switchSENSE technology. It could also be shown that small changes in the amino acid sequence of the spike protein resulted in complete loss of binding. Interactions of the peptide and inactivated virus material as well as pseudo virus particles could be measured. Additionally, the switchSENSE technology was utilized to rank six antibodies for their binding affinity towards the nucleocapsid protein of SARS-CoV-2 for the development of a rapid antigen test device. The technique was furthermore employed to show binding of a non-enveloped virus (adenovirus) and a virus-like particle (norovirus-like particle) to antibodies. Apart from binding interactions, the use of DNA origami levers with a length of around 50 nm enabled the switching of virus material. This proved that the technology is also able to size objects with a hydrodynamic diameter larger than 14 nm. A theoretical work on diffusion and reaction-limited binding interactions revealed that the technique and the chosen parameters enable the determination of binding rate constants in the reaction-limited regime. Overall, the applicability of the switchSENSE technique to virus-receptor binding interactions could be demonstrated on multiple examples. While there are challenges that remain, the setup enables the determination of affinities between viruses and receptors in their native environment. Especially the possibilities regarding the quantification of oligo- and multivalent binding interactions could be presented.}, language = {en} } @phdthesis{Raschke2023, author = {Raschke, Stefanie}, title = {Characterization of selenium and copper in cell systems of the neurovascular unit}, doi = {10.25932/publishup-60366}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-603666}, school = {Universit{\"a}t Potsdam}, pages = {XIV, 184, v}, year = {2023}, abstract = {The trace elements, selenium (Se) and copper (Cu) play an important role in maintaining normal brain function. Since they have essential functions as cofactors of enzymes or structural components of proteins, an optimal supply as well as a well-defined homeostatic regulation are crucial. Disturbances in trace element homeostasis affect the health status and contribute to the incidence and severity of various diseases. The brain in particular is vulnerable to oxidative stress due to its extensive oxygen consumption and high energy turnover, among other factors. As components of a number of antioxidant enzymes, both elements are involved in redox homeostasis. However, high concentrations are also associated with the occurrence of oxidative stress, which can induce cellular damage. Especially high Cu concentrations in some brain areas are associated with the development and progression of neurodegenerative diseases such as Alzheimer's disease (AD). In contrast, reduced Se levels were measured in brains of AD patients. The opposing behavior of Cu and Se renders the study of these two trace elements as well as the interactions between them being particularly relevant and addressed in this work.}, language = {en} } @phdthesis{Pruefer2023, author = {Pr{\"u}fer, Mareike}, title = {Charakterisierung und wechselfeldgest{\"u}tzte Herstellung von Enzym-Nanoarrays}, doi = {10.25932/publishup-61232}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-612329}, school = {Universit{\"a}t Potsdam}, pages = {104}, year = {2023}, abstract = {Dielektrophorese ist die Manipulation polarisierbarer Partikel durch inhomogene elektrische Wechselfelder. In dieser Arbeit wurden drei verschiedene Enzyme durch Dielektrophorese immobilisiert und anschließend hinsichtlich ihrer katalytischen Aktivit{\"a}t untersucht: Meerrettichperoxidase, Cholinoxidase aus Alcaligenes sp. und Glucoseoxidase aus Aspergillus niger. Die Immobilisierung erfolgte durch Dielektrophorese auf nano-Elektrodenarrays aus Wolfram-Zylindern mit 500 nm Durchmesser oder aus Titannitrid-Ringen mit 20 nm Breite. Die Immobilisierung der Enzyme konnte fluoreszenzmikroskopisch entweder anhand der intrinsischen Fluoreszenz oder aufgrund einer Fluoreszenzmarkierung vor oder nach der Immobilisierung f{\"u}r alle getesteten Enzyme nachgewiesen werden. Die Messung der Enzymaktivit{\"a}t erfolgte quantitativ durch den direkten oder indirekten Nachweis des gebildeten Produktes oder, im Falle der Cholinoxidase, durch Beobachtung der intrinsischen Fluoreszenz des Cofaktors FAD, die vom Oxidationszustand dieses Enzyms abh{\"a}ngt. F{\"u}r die Meerrettichperoxidase konnte so eine hohe erhaltene Enzymaktivit{\"a}t nach der Immobilisierung nachgewiesen werden. Die Aktivit{\"a}t der permanent immobilisierten Fraktion der Meerrettichperoxidase entsprach bis zu 47 \% der h{\"o}chstm{\"o}glichen Aktivit{\"a}t einer Monolage dieses Enzyms auf den Elektroden des Chips. Diese Aktivit{\"a}t kann als aktive, aber zuf{\"a}llig gegen{\"u}ber der Oberfl{\"a}che ausgerichtete Enzymschicht interpretiert werden. F{\"u}r die permanent immobilisierte Glucoseoxidase wurde nur eine Aktivit{\"a}t entsprechend <1,3 \% der Aktivit{\"a}t einer solchen Enzymschicht detektiert, w{\"a}hrend f{\"u}r die immobilisierte Cholinoxidase gar keine Aktivit{\"a}t nachgewiesen werden konnte. Die Aktivit{\"a}t der durch DEP immobilisierten Enzyme konnte somit quantitativ bestimmt werden. Der Anteil an erhaltener Aktivit{\"a}t h{\"a}ngt dabei stark vom verwendeten Enzym ab.}, language = {de} } @phdthesis{Haseeb2023, author = {Haseeb, Haider}, title = {Charge and heat transport across interfaces in nanostructured porous silicon}, doi = {10.25932/publishup-61122}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-611224}, school = {Universit{\"a}t Potsdam}, pages = {84}, year = {2023}, abstract = {This thesis discusses heat and charge transport phenomena in single-crystalline Silicon penetrated by nanometer-sized pores, known as mesoporous Silicon (pSi). Despite the extensive attention given to it as a thermoelectric material of interest, studies on microscopic thermal and electronic transport beyond its macroscopic characterizations are rarely reported. In contrast, this work reports the interplay of both. PSi samples synthesized by electrochemical anodization display a temperature dependence of specific heat 𝐶𝑝 that deviates from the characteristic 𝑇^3 behaviour (at 𝑇<50𝐾). A thorough analysis reveals that both 3D and 2D Einstein and Debye modes contribute to this specific heat. Additional 2D Einstein modes (~3 𝑚𝑒𝑉) agree reasonably well with the boson peak of SiO2 in pSi pore walls. 2D Debye modes are proposed to account for surface acoustic modes causing a significant deviation from the well-known 𝑇^3 dependence of 𝐶𝑝 at 𝑇<50𝐾. A novel theoretical model gives insights into the thermal conductivity of pSi in terms of porosity and phonon scattering on the nanoscale. The thermal conductivity analysis utilizes the peculiarities of the pSi phonon dispersion probed by the inelastic neutron scattering experiments. A phonon mean-free path of around 10 𝑛𝑚 extracted from the presented model is proposed to cause the reduced thermal conductivity of pSi by two orders of magnitude compared to p-doped bulk Silicon. Detailed analysis indicates that compound averaging may cause a further 10-50\% reduction. The percolation threshold of 65\% for thermal conductivity of pSi samples is subsequently determined by employing theoretical effective medium models. Temperature-dependent electrical conductivity measurements reveal a thermally activated transport process. A detailed analysis of the activation energy 𝐸𝐴𝜎 in the thermally activated transport exhibits a Meyer Neldel compensation rule between different samples that originates in multi-phonon absorption upon carrier transport. Activation energies 𝐸𝐴𝑆 obtained from temperature-dependent thermopower measurements provide further evidence for multi-phonon assisted hopping between localized states as a dominant charge transport mechanism in pSi, as they systematically differ from the determined 𝐸𝐴𝜎 values.}, language = {en} } @article{Hermanns2023, author = {Hermanns, Jolanda}, title = {Chemieunterricht f{\"u}r heterogene Lerngruppen - eine Lehrveranstaltung f{\"u}r Lehramtsstudierende}, series = {PSI-Potsdam: Ergebnisbericht zu den Aktivit{\"a}ten im Rahmen der Qualit{\"a}tsoffensive Lehrerbildung (2019-2023) (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 3)}, journal = {PSI-Potsdam: Ergebnisbericht zu den Aktivit{\"a}ten im Rahmen der Qualit{\"a}tsoffensive Lehrerbildung (2019-2023) (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 3)}, number = {3}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-568-2}, issn = {2626-3556}, doi = {10.25932/publishup-61783}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-617836}, pages = {205 -- 213}, year = {2023}, abstract = {Im Sommersemester 2022 wurde erstmalig die Lehrveranstaltung „Chemieunterricht f{\"u}r heterogene Lerngruppen" angeboten. Diese Lehrveranstaltung ist im Rahmen von PSI-Potsdam im Schwerpunkt „Inklusion und Heterogenit{\"a}t" entstanden. Die Lehrveranstaltung wurde synchron online durchgef{\"u}hrt. Die Studierenden erhielten viele M{\"o}glichkeiten zur Diskussion sowie zur selbstst{\"a}ndigen Erstellung von Unterrichtsmaterialien. Zum erfolgreichen Abschluss des Moduls erstellten die Studierenden ein Portfolio zu einem selbst gew{\"a}hlten Thema. Die Lehrveranstaltung wurde von den Studierenden sehr gut bewertet.}, language = {de} } @phdthesis{Alexoudi2023, author = {Alexoudi, Xanthippi}, title = {Clarifying the discrepant results in the characterization of exoplanetary atmospheres}, doi = {10.25932/publishup-60565}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-605659}, school = {Universit{\"a}t Potsdam}, pages = {xvi, 125}, year = {2023}, abstract = {Planets outside our solar system, so-called "exoplanets", can be detected with different methods, and currently more than 5000 exoplanets have been confirmed, according to NASA Exoplanet Archive. One major highlight of the studies on exoplanets in the past twenty years is the characterization of their atmospheres usingtransmission spectroscopy as the exoplanet transits. However, this characterization is a challenging process and sometimes there are reported discrepancies in the literature regarding the atmosphere of the same exoplanet. One potential reason for the observed atmospheric inconsistencies is called impact parameter degeneracy, and it is highly driven by the limb darkening effect of the host star. A brief introductionto those topics in presented in chapter 1, while the motivation and objectives of thiswork are described in chapter 2.The first goal is to clarify the origin of the transmission spectrum, which is anindicator of an exoplanet's atmosphere; whether it is real or influenced by the impactparameter degeneracy. A second goal is to determine whether photometry from space using the Transiting Exoplanet Survey Satellite (TESS), could improve on the major parameters, which are responsible for the aforementioned degeneracy, of known exoplanetary systems. Three individual projects were conducted in order toaddress those goals. The three manuscripts are presented, in short, in the manuscriptoverview in chapter 3.More specifically, in chapter 4, the first manuscript is presented, which is an ex-tended investigation on the impact parameter degeneracy and its application onsynthetic transmission spectra. Evidently, the limb darkening of the host star isan important driver for this effect. It keeps the degeneracy persisting through different groups of exoplanets, based on the uncertainty of their impact parameter and on the type of their host star. The second goal, was addressed in the second and third manuscripts (chapter 5 and chapter 6 respectively). Using observationsfrom the TESS mission, two samples of exoplanets were studied; 10 transiting inflated hot-Jupiters and 43 transiting grazing systems. Potentially, the refinement or confirmation of their major system parameters' measurements can assist in solving current or future discrepancies regarding their atmospheric characterization.In chapter 7 the conclusions of this work are discussed, while in chapter 8 itis proposed how TESS's measurements can be able to discern between erroneousinterpretations of transmission spectra, especially on systems where the impact parameter degeneracy is likely not applicable.}, language = {en} } @phdthesis{Mtilatila2023, author = {Mtilatila, Lucy Mphatso Ng'ombe}, title = {Climate change effects on drought, freshwater availability and hydro-power generation in an African environment}, doi = {10.25932/publishup-59929}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-599298}, school = {Universit{\"a}t Potsdam}, pages = {xv, 167}, year = {2023}, abstract = {The work is designed to investigate the impacts and sensitivity of climate change on water resources, droughts and hydropower production in Malawi, the South-Eastern region which is highly vulnerable to climate change. It is observed that rainfall is decreasing and temperature is increasing which calls for the understanding of what these changes may impact the water resources, drought occurrences and hydropower generation in the region. The study is conducted in the Greater Lake Malawi Basin (Lake Malawi and Shire River Basins) and is divided into three projects. The first study is assessing the variability and trends of both meteorological and hydrological droughts from 1970-2013 in Lake Malawi and Shire River basins using the standardized precipitation index (SPI) and standardized precipitation and evaporation Index (SPEI) for meteorological droughts and the lake level change index (LLCI) for hydrological droughts. And later the relationship of the meteorological and hydrological droughts is established. While the second study extends the drought analysis into the future by examining the potential future meteorological water balance and associated drought characteristics such as the drought intensity (DI), drought months (DM), and drought events (DE) in the Greater Lake Malawi Basin. The sensitivity of drought to changes of rainfall and temperature is also assessed using the scenario-neutral approach. The climate change projections from 20 Coordinated Regional Climate Downscaling Experiment (CORDEX) models for Africa based on two scenarios (RCP4.5 and RCP8.5) for the periods 2021-2050 and 2071-2100 are used. The study also investigates the effect of bias-correction (i.e., empirical quantile mapping) on the ability of the climate model ensemble in reproducing observed drought characteristics as compared to raw climate projections. The sensitivity of key hydrologic variables and hydropower generation to climate change in Lake Malawi and Shire River basins is assessed in third study. The study adapts the mesoscale Hydrological Model (mHM) which is applied separately in the Upper Lake Malawi and Shire River basins. A particular Lake Malawi model, which focuses on reservoir routing and lake water balance, has been developed and is interlinked between the two basins. Similar to second study, the scenario-neutral approach is also applied to determine the sensitivity of climate change on water resources more particularly Lake Malawi level and Shire River flow which later helps to estimate the hydropower production susceptibility. Results suggest that meteorological droughts are increasing due to a decrease in precipitation which is exacerbated by an increase in temperature (potential evapotranspiration). The hydrological system of Lake Malawi seems to have a >24-month memory towards meteorological conditions since the 36-months SPEI can predict hydrological droughts ten-months in advance. The study has found the critical lake level that would trigger hydrological drought to be 474.1 m.a.s.l. Despite the differences in the internal structures and uncertainties that exist among the climate models, they all agree on an increase of meteorological droughts in the future in terms of higher DI and longer events (DM). DI is projected to increase between +25\% and +50\% during 2021-2050 and between +131\% and +388\% during 2071-2100. This translates into +3 to +5, and +7 to +8 more drought months per year during both periods, respectively. With longer lasting drought events, DE is decreasing. Projected droughts based on RCP8.5 are 1.7 times more severe than droughts based on RCP4.5. It is also found that an annual temperature increase of 1°C decreases mean lake level and outflow by 0.3 m and 17\%, respectively, signifying the importance of intensified evaporation for Lake Malawi's water budget. Meanwhile, a +5\% (-5\%) deviation in annual rainfall changes mean lake level by +0.7 m (-0.6 m). The combined effects of temperature increase and rainfall decrease result in significantly lower flows on Shire River. The hydrological river regime may change from perennial to seasonal with the combination of annual temperature increase and precipitation decrease beyond 1.5°C (3.5°C) and -20\% (-15\%). The study further projects a reduction in annual hydropower production between 1\% (RCP8.5) and 2.5\% (RCP4.5) during 2021-2050 and between 5\% (RCP4.5) and 24\% (RCP8.5) during 2071-2100. The findings are later linked to global policies more particularly the United Nations Framework Convention on Climate Change (UNFCCC)'s Paris Agreement and the United Nations (UN)'s Sustainable Development Goals (SDGs), and how the failure to adhere the restriction of temperature increase below the global limit of 1.5°C will affect drought and the water resources in Malawi consequently impact the hydropower production. As a result, the achievement of most of the SDGs will be compromised. The results show that it is of great importance that a further development of hydro energy on the Shire River should take into account the effects of climate change. The information generation is important for decision making more especially supporting the climate action required to fight against climate change. The frequency of extreme climate events due to climate change has reached the climate emergency as saving lives and livelihoods require urgent action.}, language = {en} } @phdthesis{Calitri2023, author = {Calitri, Francesca}, title = {Co-evolution of erosion rates, weathering and profile development in soil landscapes of hummocky ground moraines}, doi = {10.25932/publishup-60138}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-601387}, school = {Universit{\"a}t Potsdam}, pages = {XXVII, 163, V}, year = {2023}, abstract = {Soil is today considered a non-renewable resource on societal time scale, as the rate of soil loss is higher than the one of soil formation. Soil formation is complex, can take several thousands of years and is influenced by a variety of factors, one of them is time. Oftentimes, there is the assumption of constant and progressive conditions for soil and/or profile development (i.e., steady-state). In reality, for most of the soils, their (co-)evolution leads to a complex and irregular soil development in time and space characterised by "progressive" and "regressive" phases. Lateral transport of soil material (i.e., soil erosion) is one of the principal processes shaping the land surface and soil profile during "regressive" phases and one of the major environmental problems the world faces. Anthropogenic activities like agriculture can exacerbate soil erosion. Thus, it is of vital importance to distinguish short-term soil redistribution rates (i.e., within decades) influenced by human activities differ from long-term natural rates. To do so, soil erosion (and denudation) rates can be determined by using a set of isotope methods that cover different time scales at landscape level. With the aim to unravel the co-evolution of weathering, soil profile development and lateral redistribution on a landscape level, we used Pluthonium-239+240 (239+240Pu), Beryllium-10 (10Be, in situ and meteoric) and Radiocarbon (14C) to calculate short- and long-term erosion rates in two settings, i.e., a natural and an anthropogenic environment in the hummocky ground moraine landscape of the Uckermark, North-eastern Germany. The main research questions were: 1. How do long-term and short-term rates of soil redistributing processes differ? 2. Are rates calculated from in situ 10Be comparable to those of using meteoric 10Be? 3. How do soil redistribution rates (short- and long-term) in an agricultural and in a natural landscape compare to each other? 4. Are the soil patterns observed in northern Germany purely a result of past events (natural and/or anthropogenic) or are they imbedded in ongoing processes? Erosion and deposition are reflected in a catena of soil profiles with no or almost no erosion on flat positions (hilltop), strong erosion on the mid-slope and accumulation of soil material at the toeslope position. These three characteristic process domains were chosen within the CarboZALF-D experimental site, characterised by intense anthropogenic activities. Likewise, a hydrosequence in an ancient forest was chosen for this study and being regarded as a catena strongly influenced by natural soil transport. The following main results were obtained using the above-mentioned range of isotope methods available to measure soil redistribution rates depending on the time scale needed (e.g., 239+240Pu, 10Be, 14C): 1. Short-term erosion rates are one order of magnitude higher than long-term rates in agricultural settings. 2. Both meteoric and in situ 10Be are suitable soil tracers to measure the long-term soil redistribution rates giving similar results in an anthropogenic environment for different landscape positions (e.g., hilltop, mid-slope, toeslope) 3. Short-term rates were extremely low/negligible in a natural landscape and very high in an agricultural landscape - -0.01 t ha-1 yr-1 (average value) and -25 t ha-1 yr-1 respectively. On the contrary, long-term rates in the forested landscape are comparable to those calculated in the agricultural area investigated with average values of -1.00 t ha-1 yr-1 and -0.79 t ha-1 yr-1. 4. Soil patterns observed in the forest might be due to human impact and activities started after the first settlements in the region, earlier than previously postulated, between 4.5 and 6.8 kyr BP, and not a result of recent soil erosion. 5. Furthermore, long-term soil redistribution rates are similar independently from the settings, meaning past natural soil mass redistribution processes still overshadow the present anthropogenic erosion processes. Overall, this study could make important contributions to the deciphering of the co-evolution of weathering, soil profile development and lateral redistribution in North-eastern Germany. The multi-methodological approach used can be challenged by the application in a wider range of landscapes and geographic regions.}, language = {en} } @article{Akarsu2023, author = {Akarsu, Selim}, title = {Coachingtools zur Initiierung der Selbstreflexion in der Lehrer:innenausbildung}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63183}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631834}, pages = {343 -- 348}, year = {2023}, abstract = {Sich mit dem eigenen Denken und Handeln reflexiv auseinanderzusetzen ist ein zentrales Element im Selbstreifungsprozess von Lehrkr{\"a}ften im Studium, {\"u}ber die Ausbildung bis hin zur Lehrer:innent{\"a}tigkeit im Alltag. Der Workshop erm{\"o}glichte Zug{\"a}nge zur selbstreflexiven Auseinandersetzung mit den eigenen Handlungsmustern mithilfe vom Autor (weiter)entwickelter Coachingtools, die im Rahmen der seminaristischen Lehrer:innenbildung in der zweiten Phase konzipiert und erprobt wurden.}, language = {de} } @phdthesis{Quinzan2023, author = {Quinzan, Francesco}, title = {Combinatorial problems and scalability in artificial intelligence}, doi = {10.25932/publishup-61111}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-611114}, school = {Universit{\"a}t Potsdam}, pages = {xi, 141}, year = {2023}, abstract = {Modern datasets often exhibit diverse, feature-rich, unstructured data, and they are massive in size. This is the case of social networks, human genome, and e-commerce databases. As Artificial Intelligence (AI) systems are increasingly used to detect pattern in data and predict future outcome, there are growing concerns on their ability to process large amounts of data. Motivated by these concerns, we study the problem of designing AI systems that are scalable to very large and heterogeneous data-sets. Many AI systems require to solve combinatorial optimization problems in their course of action. These optimization problems are typically NP-hard, and they may exhibit additional side constraints. However, the underlying objective functions often exhibit additional properties. These properties can be exploited to design suitable optimization algorithms. One of these properties is the well-studied notion of submodularity, which captures diminishing returns. Submodularity is often found in real-world applications. Furthermore, many relevant applications exhibit generalizations of this property. In this thesis, we propose new scalable optimization algorithms for combinatorial problems with diminishing returns. Specifically, we focus on three problems, the Maximum Entropy Sampling problem, Video Summarization, and Feature Selection. For each problem, we propose new algorithms that work at scale. These algorithms are based on a variety of techniques, such as forward step-wise selection and adaptive sampling. Our proposed algorithms yield strong approximation guarantees, and the perform well experimentally. We first study the Maximum Entropy Sampling problem. This problem consists of selecting a subset of random variables from a larger set, that maximize the entropy. By using diminishing return properties, we develop a simple forward step-wise selection optimization algorithm for this problem. Then, we study the problem of selecting a subset of frames, that represent a given video. Again, this problem corresponds to a submodular maximization problem. We provide a new adaptive sampling algorithm for this problem, suitable to handle the complex side constraints imposed by the application. We conclude by studying Feature Selection. In this case, the underlying objective functions generalize the notion of submodularity. We provide a new adaptive sequencing algorithm for this problem, based on the Orthogonal Matching Pursuit paradigm. Overall, we study practically relevant combinatorial problems, and we propose new algorithms to solve them. We demonstrate that these algorithms are suitable to handle massive datasets. However, our analysis is not problem-specific, and our results can be applied to other domains, if diminishing return properties hold. We hope that the flexibility of our framework inspires further research into scalability in AI.}, language = {en} } @phdthesis{Leins2023, author = {Leins, Johannes A.}, title = {Combining model detail with large scales}, doi = {10.25932/publishup-58283}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-582837}, school = {Universit{\"a}t Potsdam}, pages = {xv, 168}, year = {2023}, abstract = {The global climate crisis is significantly contributing to changing ecosystems, loss of biodiversity and is putting numerous species on the verge of extinction. In principle, many species are able to adapt to changing conditions or shift their habitats to more suitable regions. However, change is progressing faster than some species can adjust, or potential adaptation is blocked and disrupted by direct and indirect human action. Unsustainable anthropogenic land use in particular is one of the driving factors, besides global heating, for these ecologically critical developments. Precisely because land use is anthropogenic, it is also a factor that could be quickly and immediately corrected by human action. In this thesis, I therefore assess the impact of three climate change scenarios of increasing intensity in combination with differently scheduled mowing regimes on the long-term development and dispersal success of insects in Northwest German grasslands. The large marsh grasshopper (LMG, Stethophyma grossum, Linn{\´e} 1758) is used as a species of reference for the analyses. It inhabits wet meadows and marshes and has a limited, yet fairly good ability to disperse. Mowing and climate conditions affect the development and mortality of the LMG differently depending on its life stage. The specifically developed simulation model HiLEG (High-resolution Large Environmental Gradient) serves as a tool for investigating and projecting viability and dispersal success under different climate conditions and land use scenarios. It is a spatially explicit, stage- and cohort-based model that can be individually configured to represent the life cycle and characteristics of terrestrial insect species, as well as high-resolution environmental data and the occurrence of external disturbances. HiLEG is a freely available and adjustable software that can be used to support conservation planning in cultivated grasslands. In the three case studies of this thesis, I explore various aspects related to the structure of simulation models per se, their importance in conservation planning in general, and insights regarding the LMG in particular. It became apparent that the detailed resolution of model processes and components is crucial to project the long-term effect of spatially and temporally confined events. Taking into account conservation measures at the regional level has further proven relevant, especially in light of the climate crisis. I found that the LMG is benefiting from global warming in principle, but continues to be constrained by harmful mowing regimes. Land use measures could, however, be adapted in such a way that they allow the expansion and establishment of the LMG without overly affecting agricultural yields. Overall, simulation models like HiLEG can make an important contribution and add value to conservation planning and policy-making. Properly used, simulation results shed light on aspects that might be overlooked by subjective judgment and the experience of individual stakeholders. Even though it is in the nature of models that they are subject to limitations and only represent fragments of reality, this should not keep stakeholders from using them, as long as these limitations are clearly communicated. Similar to HiLEG, models could further be designed in such a way that not only the parameterization can be adjusted as required, but also the implementation itself can be improved and changed as desired. This openness and flexibility should become more widespread in the development of simulation models.}, language = {en} } @misc{BrinkmannKoellnerMerketal.2023, author = {Brinkmann, Pia and K{\"o}llner, Nicole and Merk, Sven and Beitz, Toralf and Altenberger, Uwe and L{\"o}hmannsr{\"o}ben, Hans-Gerd}, title = {Comparison of handheld and echelle spectrometer to assess copper in ores by means of laser-induced breakdown spectroscopy (LIBS)}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {1311}, issn = {1866-8372}, doi = {10.25932/publishup-58474}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-584742}, pages = {19}, year = {2023}, abstract = {Its properties make copper one of the world's most important functional metals. Numerous megatrends are increasing the demand for copper. This requires the prospection and exploration of new deposits, as well as the monitoring of copper quality in the various production steps. A promising technique to perform these tasks is Laser Induced Breakdown Spectroscopy (LIBS). Its unique feature, among others, is the ability to measure on site without sample collection and preparation. In this work, copper-bearing minerals from two different deposits are studied. The first set of field samples come from a volcanogenic massive sulfide (VMS) deposit, the second part from a stratiform sedimentary copper (SSC) deposit. Different approaches are used to analyze the data. First, univariate regression (UVR) is used. However, due to the strong influence of matrix effects, this is not suitable for the quantitative analysis of copper grades. Second, the multivariate method of partial least squares regression (PLSR) is used, which is more suitable for quantification. In addition, the effects of the surrounding matrices on the LIBS data are characterized by principal component analysis (PCA), alternative regression methods to PLSR are tested and the PLSR calibration is validated using field samples.}, language = {en} } @phdthesis{Wittek2023, author = {Wittek, Laura}, title = {Comparison of metabolic cages - analysis of refinement measures on the welfare and metabolic parameters of laboratory mice}, doi = {10.25932/publishup-61120}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-611208}, school = {Universit{\"a}t Potsdam}, pages = {IV, 160}, year = {2023}, abstract = {Housing in metabolic cages can induce a pronounced stress response. Metabolic cage systems imply housing mice on metal wire mesh for the collection of urine and feces in addition to monitoring food and water intake. Moreover, mice are single-housed, and no nesting, bedding, or enrichment material is provided, which is often argued to have a not negligible impact on animal welfare due to cold stress. We therefore attempted to reduce stress during metabolic cage housing for mice by comparing an innovative metabolic cage (IMC) with a commercially available metabolic cage from Tecniplast GmbH (TMC) and a control cage. Substantial refinement measures were incorporated into the IMC cage design. In the frame of a multifactorial approach for severity assessment, parameters such as body weight, body composition, food intake, cage and body surface temperature (thermal imaging), mRNA expression of uncoupling protein 1 (Ucp1) in brown adipose tissue (BAT), fur score, and fecal corticosterone metabolites (CMs) were included. Female and male C57BL/6J mice were single-housed for 24 h in either conventional Macrolon cages (control), IMC, or TMC for two sessions. Body weight decreased less in the IMC (females—1st restraint: 6.94\%; 2nd restraint: 6.89\%; males—1st restraint: 8.08\%; 2nd restraint: 5.82\%) compared to the TMC (females—1st restraint: 13.2\%; 2nd restraint: 15.0\%; males—1st restraint: 13.1\%; 2nd restraint: 14.9\%) and the IMC possessed a higher cage temperature (females—1st restraint: 23.7°C; 2nd restraint: 23.5 °C; males—1st restraint: 23.3 °C; 2nd restraint: 23.5 °C) compared with the TMC (females—1st restraint: 22.4 °C; 2nd restraint: 22.5 °C; males—1st restraint: 22.6 °C; 2nd restraint: 22.4 °C). The concentration of fecal corticosterone metabolites in the TMC (females—1st restraint: 1376 ng/g dry weight (DW); 2nd restraint: 2098 ng/g DW; males—1st restraint: 1030 ng/g DW; 2nd restraint: 1163 ng/g DW) was higher compared to control cage housing (females—1st restraint: 640 ng/g DW; 2nd restraint: 941 ng/g DW; males—1st restraint: 504 ng/g DW; 2nd restraint: 537 ng/g DW). Our results show the stress potential induced by metabolic cage restraint that is markedly influenced by the lower housing temperature. The IMC represents a first attempt to target cold stress reduction during metabolic cage application thereby producing more animal welfare friendly data.}, language = {en} } @phdthesis{Derežanin2023, author = {Derežanin, Lorena}, title = {Contribution of structural variation to adaptive evolution of mammalian genomes}, doi = {10.25932/publishup-59144}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-591443}, school = {Universit{\"a}t Potsdam}, pages = {188}, year = {2023}, abstract = {Following the extinction of dinosaurs, the great adaptive radiation of mammals occurred, giving rise to an astonishing ecological and phenotypic diversity of mammalian species. Even closely related species often inhabit vastly different habitats, where they encounter diverse environmental challenges and are exposed to different evolutionary pressures. As a response, mammals evolved various adaptive phenotypes over time, such as morphological, physiological and behavioural ones. Mammalian genomes vary in their content and structure and this variation represents the molecular mechanism for the long-term evolution of phenotypic variation. However, understanding this molecular basis of adaptive phenotypic variation is usually not straightforward. The recent development of sequencing technologies and bioinformatics tools has enabled a better insight into mammalian genomes. Through these advances, it was acknowledged that mammalian genomes differ more, both within and between species, as a consequence of structural variation compared to single-nucleotide differences. Structural variant types investigated in this thesis - such as deletion, duplication, inversion and insertion, represent a change in the structure of the genome, impacting the size, copy number, orientation and content of DNA sequences. Unlike short variants, structural variants can span multiple genes. They can alter gene dosage, and cause notable gene expression differences and subsequently phenotypic differences. Thus, they can lead to a more dramatic effect on the fitness (reproductive success) of individuals, local adaptation of populations and speciation. In this thesis, I investigated and evaluated the potential functional effect of structural variations on the genomes of mustelid species. To detect the genomic regions associated with phenotypic variation I assembled the first reference genome of the tayra (Eira barbara) relying on linked-read sequencing technology to achieve a high level of genome completeness important for reliable structural variant discovery. I then set up a bioinformatics pipeline to conduct a comparative genomic analysis and explore variation between mustelid species living in different environments. I found numerous genes associated with species-specific phenotypes related to diet, body condition and reproduction among others, to be impacted by structural variants. Furthermore, I investigated the effects of artificial selection on structural variants in mice selected for high fertility, increased body mass and high endurance. Through selective breeding of each mouse line, the desired phenotypes have spread within these populations, while maintaining structural variants specific to each line. In comparison to the control line, the litter size has doubled in the fertility lines, individuals in the high body mass lines have become considerably larger, and mice selected for treadmill performance covered substantially more distance. Structural variants were found in higher numbers in these trait-selected lines than in the control line when compared to the mouse reference genome. Moreover, we have found twice as many structural variants spanning protein-coding genes (specific to each line) in trait-selected lines. Several of these variants affect genes associated with selected phenotypic traits. These results imply that structural variation does indeed contribute to the evolution of the selected phenotypes and is heritable. Finally, I suggest a set of critical metrics of genomic data that should be considered for a stringent structural variation analysis as comparative genomic studies strongly rely on the contiguity and completeness of genome assemblies. Because most of the available data used to represent reference genomes of mammalian species is generated using short-read sequencing technologies, we may have incomplete knowledge of genomic features. Therefore, a cautious structural variation analysis is required to minimize the effect of technical constraints. The impact of structural variants on the adaptive evolution of mammalian genomes is slowly gaining more focus but it is still incorporated in only a small number of population studies. In my thesis, I advocate the inclusion of structural variants in studies of genomic diversity for a more comprehensive insight into genomic variation within and between species, and its effect on adaptive evolution.}, language = {en} } @phdthesis{Voroshnin2023, author = {Voroshnin, Vladimir}, title = {Control over spin and electronic structure of MoS₂ monolayer via interactions with substrates}, doi = {10.25932/publishup-59070}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-590709}, school = {Universit{\"a}t Potsdam}, pages = {viii, 125}, year = {2023}, abstract = {The molybdenum disulfide (MoS2) monolayer is a semiconductor with a direct bandgap while it is a robust and affordable material. It is a candidate for applications in optoelectronics and field-effect transistors. MoS2 features a strong spin-orbit coupling which makes its spin structure promising for acquiring the Kane-Mele topological concept with corresponding applications in spintronics and valleytronics. From the optical point of view, the MoS2 monolayer features two valleys in the regions of K and K' points. These valleys are differentiated by opposite spins and a related valley-selective circular dichroism. In this study we aim to manipulate the MoS2 monolayer spin structure in the vicinity of the K and K' points to explore the possibility of getting control over the optical and electronic properties. We focus on two different substrates to demonstrate two distinct routes: a gold substrate to introduce a Rashba effect and a graphene/cobalt substrate to introduce a magnetic proximity effect in MoS2. The Rashba effect is proportional to the out-of-plane projection of the electric field gradient. Such a strong change of the electric field occurs at the surfaces of a high atomic number materials and effectively influence conduction electrons as an in-plane magnetic field. A molybdenum and a sulfur are relatively light atoms, thus, similar to many other 2D materials, intrinsic Rashba effect in MoS2 monolayer is vanishing small. However, proximity of a high atomic number substrate may enhance Rashba effect in a 2D material as it was demonstrated for graphene previously. Another way to modify the spin structure is to apply an external magnetic field of high magnitude (several Tesla), and cause a Zeeman splitting, the conduction electrons. However, a similar effect can be reached via magnetic proximity which allows us to reduce external magnetic fields significantly or even to zero. The graphene on cobalt interface is ferromagnetic and stable for MoS2 monolayer synthesis. Cobalt is not the strongest magnet; therefore, stronger magnets may lead to more significant results. Nowadays most experimental studies on the dichalcogenides (MoS2 included) are performed on encapsulated heterostructures that are produced by mechanical exfoliation. While mechanical exfoliation (or scotch-tape method) allows to produce a huge variety of structures, the shape and the size of the samples as well as distance between layers in heterostructures are impossible to control reproducibly. In our study we used molecular beam epitaxy (MBE) methods to synthesise both MoS2/Au(111) and MoS2/graphene/Co systems. We chose to use MBE, as it is a scalable and reproducible approach, so later industry may adapt it and take over. We used graphene/cobalt instead of just a cobalt substrate because direct contact of MoS2\ monolayer and a metallic substrate may lead to photoluminescence (PL) quenching in the metallic substrate. Graphene and hexagonal boron nitride monolayer are considered building blocks of a new generation of electronics also commonly used as encapsulating materials for PL studies. Moreover graphene is proved to be a suitable substrate for the MBE growth of transitional metal dichalcogenides (TMDCs). In chapter 1, we start with an introduction to TMDCs. Then we focus on MoS2 monolayer state of the art research in the fields of application scenario; synthesis approaches; electronic, spin, and optical properties; and interactions with magnetic fields and magnetic materials. We briefly touch the basics of magnetism in solids and move on to discuss various magnetic exchange interactions and magnetic proximity effect. Then we describe MoS2 optical properties in more detail. We start from basic exciton physics and its manifestation in the MoS2 monolayer. We consider optical selection rules in the MoS2 monolayer and such properties as chirality, spin-valley locking, and coexistence of bright and dark excitons. Chapter 2 contains an overview of the employed surface science methods: angle-integrated, angle-resolved, and spin-resolved photoemission; low energy electron diffraction and scanning tunneling microscopy. In chapter 3, we describe MoS2 monolayer synthesis details for two substrates: gold monocrystal with (111) surface and graphene on cobalt thin film with Co(111) surface orientation. The synthesis descriptions are followed by a detailed characterisation of the obtained structures: fingerprints of MoS2 monolayer formation; MoS2 monolayer symmetry and its relation to the substrate below; characterisation of MoS2 monolayer coverage, domain distribution, sizes and shapes, and moire structures. In chapter~4, we start our discussion with MoS2/Au(111) electronic and spin structure. Combining density functional theory computations (DFT) and spin-resolved photoemission studies, we demonstrate that the MoS2 monolayer band structure features an in-plane Rashba spin splitting. This confirms the possibility of MoS2 monolayer spin structure manipulation via a substrate. Then we investigate the influence of a magnetic proximity in the MoS2/graphene/Co system on the MoS2 monolayer spin structure. We focus our investigation on MoS2 high symmetry points: G and K. First, using spin-resolved measurements, we confirm that electronic states are spin-split at the G point via a magnetic proximity effect. Second, combining spin-resolved measurements and DFT computations for MoS2 monolayer in the K point region, we demonstrate the appearance of a small in-plane spin polarisation in the valence band top and predict a full in-plane spin polarisation for the conduction band bottom. We move forward discussing how these findings are related to the MoS2 monolayer optical properties, in particular the possibility of dark exciton observation. Additionally, we speculate on the control of the MoS2 valley energy via magnetic proximity from cobalt. As graphene is spatially buffering the MoS2 monolayer from the Co thin film, we speculate on the role of graphene in the magnetic proximity transfer by replacing graphene with vacuum and other 2D materials in our computations. We finish our discussion by investigating the K-doped MoS2/graphene/Co system and the influence of this doping on the electronic and spin structure as well as on the magnetic proximity effect. In summary, using a scalable MBE approach we synthesised MoS2/Au(111) and MoS2/graphene/Co systems. We found a Rashba effect taking place in MoS2/Au(111) which proves that the MoS2 monolayer in-plane spin structure can be modified. In MoS2/graphene/Co the in-plane magnetic proximity effect indeed takes place which rises the possibility of fine tuning the MoS2 optical properties via manipulation of the the substrate magnetisation.}, language = {en} } @phdthesis{Haase2023, author = {Haase, Jennifer}, title = {Creative intensive processes}, doi = {10.25932/publishup-59388}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-593886}, school = {Universit{\"a}t Potsdam}, pages = {xiii, 346}, year = {2023}, abstract = {Creativity - developing something new and useful - is a constant challenge in the working world. Work processes, services, or products must be sensibly adapted to changing times. To be able to analyze and, if necessary, adapt creativity in work processes, a precise understanding of these creative activities is necessary. Process modeling techniques are often used to capture business processes, represent them graphically and analyze them for adaptation possibilities. This has been very limited for creative work. An accurate understanding of creative work is subject to the challenge that, on the one hand, it is usually very complex and iterative. On the other hand, it is at least partially unpredictable as new things emerge. How can the complexity of creative business processes be adequately addressed and simultaneously manageable? This dissertation attempts to answer this question by first developing a precise process understanding of creative work. In an interdisciplinary approach, the literature on the process description of creativity-intensive work is analyzed from the perspective of psychology, organizational studies, and business informatics. In addition, a digital ethnographic study in the context of software development is used to analyze creative work. A model is developed based on which four elementary process components can be analyzed: Intention of the creative activity, Creation to develop the new, Evaluation to assess its meaningfulness, and Planning of the activities arising in the process - in short, the ICEP model. These four process elements are then translated into the Knockledge Modeling Description Language (KMDL), which was developed to capture and represent knowledge-intensive business processes. The modeling extension based on the ICEP model enables creative business processes to be identified and specified without the need for extensive modeling of all process details. The modeling extension proposed here was developed using ethnographic data and then applied to other organizational process contexts. The modeling method was applied to other business contexts and evaluated by external parties as part of two expert studies. The developed ICEP model provides an analytical framework for complex creative work processes. It can be comprehensively integrated into process models by transforming it into a modeling method, thus expanding the understanding of existing creative work in as-is process analyses.}, language = {en} } @phdthesis{Kager2023, author = {Kager, Klara}, title = {Critical Research Needs in Lesson Study: Then, Now, and Looking Forward}, doi = {10.25932/publishup-60271}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-602711}, school = {Universit{\"a}t Potsdam}, pages = {iii, 252}, year = {2023}, abstract = {The collaboration-based professional development approach Lesson Study (LS), which has its roots in the Japanese education system, has gained international recognition over the past three decades and spread quickly throughout the world. LS is a collaborative method to professional development (PD) that incorporates multiple characteristics that have been identified in the research literature as key to effective PD. Specifically, LS is a long-term process that consists of subsequent inquiry cycles, it is site-based and integrated in teachers' practice, it encourages collaboration and reflection, places a strong emphasis on student learning, and it typically involves external experts that support the process or offer additional insights. As LS integrates all these characteristics, it has rapidly gained international popularity since the turn of the 21st century and is currently being practiced in over 40 countries around the world. This international borrowing of the idea of LS to new national contexts has given rise to a research field that aims to investigate the effectiveness of LS on teacher learning as well as the circumstances and mechanisms that make LS effective in various settings around the world. Such research is important, as borrowing educational innovations and adapting them to new contexts can be a challenging process. Educational innovations that fail to deliver the expected outcomes tend to be abandoned prematurely and before they have been completely understood or a substantial research base has been established. In order to prevent LS from early abandonment, Lewis and colleagues outlined three critical research needs in 2006, not long after LS was initially introduced to the United States. These research needs included (1) developing a descriptive knowledge base on LS, (2) examining the mechanisms by which teachers learn through LS, and (3) using design-based research cycles to analyze and improve LS. This dissertation set out to take stock of the progress that has been made on these research needs over the past 20 years. The scoping review conducted for the framework of this dissertation indicates that, while a large and international knowledge base has been developed, the field has not yet produced reliable evidence of the effectiveness of LS. Based on the scoping review, this dissertation makes the case that Lewis et al.'s (2006) critical research needs should be updated. In order to do so, a number of limitations to the current knowledge base on LS need to be addressed. These limitations include (1) the frequent lack of comparable and replicable descriptions of the LS intervention in publications, (2) the incoherent use or lack of use of theoretical frameworks to explain teacher learning through LS, (3) the inconsistent use of terminology and concepts, and (4) the lack of scientific rigor in research studies and of established ways or tools to measure the effectiveness of LS. This dissertation aims to advance the critical research needs in the field by examining the extent and nature of these limitations in three research studies. The focus of these studies lies on the LS stages of observation and reflection, as these stages have a high potential to facilitate teacher learning. The first study uses a mixed-method design to examine how teachers at German primary schools reflect critically together. The study derives a theory-based definition of critical and collaborative reflection in order to re-frame the reflection element in LS. The second study, a systematic review of 129 articles on LS, assess how transparent research articles are in reporting how teachers observed and reflected together. In addition, it is investigated whether these articles provide any kind of theorization for the stages of observation and reflection. The third study proposes a conceptual model for the field of LS that is based on existing models of continuous professional development and research findings on team effectiveness and collaboration. The model describes the dimensions of input, mediating mechanisms, and outcomes in order to provide a conceptual grid to teachers' continuous professional development through LS.}, language = {en} } @article{Gerbig2023, author = {Gerbig, Stephan}, title = {Das 12. Zusatzprotokoll zur EMRK - Chancen und Potenziale eines allgemeinen und umfassenden Diskriminierungsverbots}, series = {MenschenRechtsMagazin}, volume = {28}, journal = {MenschenRechtsMagazin}, number = {2}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2941-1149}, doi = {10.25932/publishup-60993}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-609937}, pages = {106 -- 117}, year = {2023}, abstract = {Diskriminierungsverbote geh{\"o}ren zu den Grundpfeilern des internationalen Menschenrechtsschutzes. Es gibt sie in unterschiedlichen Auspr{\"a}gungen: Manche sch{\"u}tzen nur vor einer Ungleichbehandlung bei der Inanspruchnahme eines Freiheitsrechts (sog. akzessorische Diskriminierungsverbote), andere sch{\"u}tzen demgegen{\"u}ber vor einer Ungleichbehandlung in s{\"a}mtlichen Rechtskontexten. Ein allgemeines und umfassendes Diskriminierungsverbot, welches in allen Rechtskontexten gilt, findet sich in Artikel 1 des 12. Zusatzprotokoll zur EMRK. Dieses Zusatzprotokoll wurde von vielen europ{\"a}ischen Staaten - darunter auch Deutschland - bisher nicht ratifiziert. Der Beitrag m{\"o}chte die menschenrechtlichen Potenziale und Mehrwerte dieses Zusatzprotokolls aufzeigen und nimmt dabei auch umfassend Bezug auf die Lernerfahrungen des UN-Zivilpakts, welcher mit Art. 26 UN-Zivilpakt eine strukturanaloge Regelung kennt.}, language = {de} } @article{Lewek2023, author = {Lewek, Tobias}, title = {Das Außerunterrichtliche P{\"a}dagogische Praktikum als kasuistisches Reflexionsangebot}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63199}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631991}, pages = {437 -- 443}, year = {2023}, abstract = {Dieser Beitrag besch{\"a}ftigt sich mit den Herausforderungen der Professionalisierung angehender Lehrkr{\"a}fte im Rahmen der universit{\"a}ren Lehrkr{\"a}ftebildung und nimmt dabei kasuistische Lehrformate als wichtige Elemente hochschuldidaktischer Konzeptionen in den Blick. In diesem Zusammenhang wird das Modul „Außerunterrichtliches P{\"a}dagogisches Praktikum" (AuPP) als ein zentrales Element der Praxisphasen des Lehramtsstudiums an der Martin-Luther-Universit{\"a}t Halle-Wittenberg (MLU) vorgestellt. Im Rahmen dieses Moduls wird versucht, durch die Arbeit an konkreten F{\"a}llen aus der p{\"a}dagogischen Praxis - gemeint sind vor allem Beobachtungsprotokolle und Transkripte von Interviewausz{\"u}gen aus unterschiedlichen (sozial-)p{\"a}dagogischen Handlungsfeldern - einen reflexiven Zugang zu Spannungsmomenten, Problem- und Krisendynamiken, Orientierungsmustern der Akteur:innen sowie Gelingensbedingungen p{\"a}dagogischer Praxis f{\"u}r angehende Lehrpersonen zu er{\"o}ffnen und dar{\"u}ber einen reflexiven Habitus anzubahnen, der f{\"u}r die weitere Berufsbiografie und Professionalisierung essenziell erscheint.}, language = {de} } @article{MalekTinnefeld2023, author = {Malek, Jennifer and Tinnefeld, Anja}, title = {Das ePortfolio als Reflexionselement - Potenziale, Herausforderungen und Umsetzung der Portfolioarbeit an der Universit{\"a}t zu K{\"o}ln}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63136}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631361}, pages = {199 -- 205}, year = {2023}, abstract = {Portfolioarbeit ist ein gesetzlich verankerter Bestandteil der Lehramtsausbildung in Nordrhein-Westfalen. {\"U}ber alle Praxisphasen hinweg f{\"u}hren Lehramtsstudierende ein Portfolio und dokumentieren darin ihren individuellen Professionalisierungsweg und reflektieren ihre Studien- und Berufswahl, ihre schulpraktischen Beobachtungen und Erfahrungen sowie ihre individuelle Kompetenzentwicklung. Der vorliegende Beitrag gibt einen {\"U}berblick {\"u}ber die Arbeit mit dem ePortfolio in der Lehrkr{\"a}ftebildung an der Universit{\"a}t zu K{\"o}ln (UzK). Dabei werden zun{\"a}chst die Potenziale von Portfolioarbeit aufgef{\"u}hrt und Herausforderungen herausgestellt. Im Anschluss erfolgt eine konkrete Erl{\"a}uterung der Notwendigkeit einer koh{\"a}renten Einbindung des ePortfolios in die Seminararbeit und eine kurze Darstellung der Weiterentwicklung im Rahmen des Verbundprojekts ePort.nrw.}, language = {de} } @article{Hermanns2023, author = {Hermanns, Jolanda}, title = {Das erweiterte Fachwissen f{\"u}r den schulischen Kontext}, series = {PSI-Potsdam: Ergebnisbericht zu den Aktivit{\"a}ten im Rahmen der Qualit{\"a}tsoffensive Lehrerbildung (2019-2023) (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 3)}, journal = {PSI-Potsdam: Ergebnisbericht zu den Aktivit{\"a}ten im Rahmen der Qualit{\"a}tsoffensive Lehrerbildung (2019-2023) (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 3)}, number = {3}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-568-2}, issn = {2626-3556}, doi = {10.25932/publishup-61761}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-617617}, pages = {193 -- 203}, year = {2023}, abstract = {Das Konstrukt des erweiterten Fachwissens f{\"u}r den schulischen Kontext, welches in der ersten F{\"o}rderphase von PSI-Potsdam entwickelt wurde, diente als Grundlage f{\"u}r die Entwicklung von Aufgaben, Lehrformate sowie einem Laborpraktikum im Bereich organischer Chemie. Eine Delphi-Studie wurde zur Validierung der Anwendung des Konstruktes auf die organische Chemie durchgef{\"u}hrt. Alle Aufgaben und Lehrformate wurden in Mixed-Methods-Studien evaluiert. Es zeigte sich, dass die Studierenden sowohl die Aufgaben als auch die Lehrformate und das Praktikum als relevant f{\"u}r ihren sp{\"a}teren Beruf als Chemielehrkr{\"a}fte bewerteten.}, language = {de} } @article{KraftPaessler2023, author = {Kraft, Tobias and P{\"a}ßler, Ulrich}, title = {Das Ganze erfassen}, series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, volume = {XXIV}, journal = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, number = {47}, editor = {Ette, Ottmar and Knobloch, Eberhard}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2568-3543}, doi = {10.18443/365}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-617753}, pages = {15 -- 27}, year = {2023}, abstract = {Der Wissenschaftshistoriker Eberhard Knobloch besch{\"a}ftigt sich seit rund zwanzig Jahren mit Leben und Werk Alexander von Humboldts. Er zeigt, dass Humboldts Wissenschaftstheorie vom Naturbild der pythagoreischen Schule inspiriert war, seine wissenschaftliche Methode hingegen dem Vorbild der Himmelsmechanik Laplaces folgte. Humboldt entwickelte aus diesen Quellen ein auf Zahlenverh{\"a}ltnisse und Mittelwerte gegr{\"u}ndetes Erkenntnismodell, das wegweisend f{\"u}r die datenbasierten Bio- und Geowissenschaften wurde. Die wechselseitige Verbundenheit der verschiedenen Naturph{\"a}nomene visualisierte Humboldt in seinem ‚Tableau physique des Andes'. In mehreren Aufs{\"a}tzen entschl{\"u}sselte Eberhard Knobloch auf anschauliche Weise diesen komplexen Blick ins Ganze der Natur.}, language = {de} } @article{BredekampUsenbinz2023, author = {Bredekamp, Horst and Usenbinz, Kay}, title = {Das Geb{\"a}ude: Teil des Gendarmenplatzes und Relais der Berliner Museen}, series = {Die Preußische Seehandlung zwischen Markt, Staat und Kultur : 40 Jahre Stiftung Preußische Seehandlung}, journal = {Die Preußische Seehandlung zwischen Markt, Staat und Kultur : 40 Jahre Stiftung Preußische Seehandlung}, editor = {Wienfort, Monika}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-562-0}, doi = {10.25932/publishup-59988}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-599884}, pages = {81 -- 102}, year = {2023}, abstract = {Der Beitrag widmet sich der Baugeschichte des Geb{\"a}udes der Preußischen Seehandlung bis zu seinem Abriss und dem Neubau in den Jahren 1901-1903, um dann die Ver{\"a}nderungen dieses Bauwerkes bis in die Gegenwart zu verfolgen. In einem zweiten Schritt wird versucht, die Stellung dieser Geb{\"a}ude im urbanen Kontext zu verorten. Der dritte Teil rekonstruiert an Beispielen, welch markanten Beitrag die Preußische Seehandlung f{\"u}r die Berliner Museen und insbesondere f{\"u}r die im Berliner Schloss lozierte Kunstkammer wie auch f{\"u}r das Museum f{\"u}r Naturkunde geleistet hat, indem seine Großsegler Meteor und Princess Louise von ihren Weltreisen jeweils reich beladen mit naturkundlichen und v{\"o}lkerkundlichen Exponaten zur{\"u}ckkamen, die durch Austausch oder Kauf oder auch als Geschenk erworben worden waren.}, language = {de} } @article{Luh2023, author = {Luh, J{\"u}rgen}, title = {Das Jahr 1772}, series = {Die Preußische Seehandlung zwischen Markt, Staat und Kultur : 40 Jahre Stiftung Preußische Seehandlung}, journal = {Die Preußische Seehandlung zwischen Markt, Staat und Kultur : 40 Jahre Stiftung Preußische Seehandlung}, editor = {Wienfort, Monika}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-562-0}, doi = {10.25932/publishup-59985}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-599859}, pages = {9 -- 24}, year = {2023}, abstract = {Im Jahr 1772 besch{\"a}ftigten drei Dinge, die lange Zeit ihre Bedeutung behalten sollten, den preußischen K{\"o}nig Friedrich den Großen. Zun{\"a}chst war dies die Adelsrepublik Polen. Polen beabsichtigte er zusammen mit der Zarin Katharina II. von Russland und Kaiserin Maria Theresia zu zerteilen. Dies geschah am 5. August des Jahres. Der geraubte Landgewinn f{\"u}hrte bei Friedrich II. zu wirtschaftlichen {\"U}berlegungen. Mit und in den annektierten Gebieten wollte er den preußischen Handel intensivieren, zuv{\"o}rderst den Salzhandel, und zwar am liebsten mit Spanien, einem Land, mit dem er schon seit geraumer Zeit versuchte, einen Handelsvertrag abzuschließen. Dazu gr{\"u}ndete er u. a. die Preußische Seehandlungs-Gesellschaft, die, um sich zu behaupten, verschiedene weitreichende Privilegien erhielt. Ein schneller Erfolg der Bem{\"u}hungen blieb jedoch aus. Trotz aller gew{\"a}hrten Privilegien florierten die Gesch{\"a}fte der Seehandlungs-Gesellschaft in den ersten Jahren nach ihrer Gr{\"u}ndung nicht in dem erhofften Maß. Zu Lebzeiten des K{\"o}nigs kam auch kein Handelsvertrag mit Spanien zustande. Bis die Seehandlung durch die Vorteile, die sie aus dem annektierten Polen ziehen konnte, profitierte, dauerte es noch einige Jahre.}, language = {de} } @misc{Balzar2023, author = {Balzar, Christoph}, title = {Das kolonisierte Heiligtum}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {807}, issn = {1866-8364}, doi = {10.25932/publishup-57405}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-574058}, pages = {232}, year = {2023}, abstract = {W{\"a}hrend der Zeit des historischen Kolonialismus wurden in V{\"o}lkerkundemuseen komplexe Formen rassistischer und religi{\"o}ser Diskriminierung institutionalisiert, z.B. in den dort g{\"u}ltigen {\"A}sthetik- und Kunstbegriffen. Viele der heutigen Museumsangestellten erkl{\"a}ren sich deswegen zu Reformen bereit. Doch k{\"o}nnen sie sich tats{\"a}chlich vom Kolonialismus trennen? Ist eine Dekolonisation ethnologischer Museen mit kolonialer Beute je abschließend m{\"o}glich? Am Beispiel umstrittener Heiligt{\"u}mer lebender Kulturen untersucht Christoph Balzar das Verfahren der Musealisierung durch die Linse der Diskriminierungskritik. Im Fokus stehen dabei die Sammlungen der »Staatlichen Museen zu Berlin«.}, language = {de} } @article{Still2023, author = {Still, Melina}, title = {Das Vorsorgeprinzip - ein untersch{\"a}tzter Bestandteil menschenrechtlicher Klimaklagen?}, series = {MenschenRechtsMagazin}, volume = {28}, journal = {MenschenRechtsMagazin}, number = {1}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2941-1149}, doi = {10.25932/publishup-58785}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-587852}, pages = {27 -- 38}, year = {2023}, abstract = {Das Vorsorgeprinzip ist ein mittlerweile weit verbreiteter und etablierter Grundsatz des internationalen und europ{\"a}ischen Umweltrechts. Demnach sollen auch in Situationen wissenschaftlicher Unsicherheit pr{\"a}ventive Maßnahmen ergriffen werden, um schwerwiegende Umweltsch{\"a}den zu vermeiden. Dieser Beitrag untersucht die Rolle des Vorsorgeprinzips im Zusammenhang mit menschenrechtlichen Klimaklagen, die aufgrund langsamer politischer Fortschritte und erfolgreicher Gerichtsentscheidungen zunehmend an Popularit{\"a}t gewinnen. Zun{\"a}chst wird ein {\"U}berblick {\"u}ber die Entwicklung und den materiellen Gehalt des Vorsorgeprinzips im internationalen und europ{\"a}ischen Recht gegeben. Obwohl das Vorsorgeprinzip seit den 1980er Jahren ein fixer Bestandteil des internationalen Umweltrechts ist, bestehen {\"u}ber dessen genauen Inhalt und Rechtsnatur nach wie vor Kontroversen. Im Unionsrecht wurde das Vorsorgeprinzip insbesondere durch die Rechtsprechung des EuGH konkretisiert. Im n{\"a}chsten Teil des Beitrags wird beleuchtet, welche Bedeutung der EGMR dem Vorsorgeprinzip in umweltrechtlichen F{\"a}llen bisher zugemessen hat. Hierbei steht die Entscheidung Tǎtar gegen Rum{\"a}nien im Mittelpunkt. Gegenstand dieser Entscheidung war der Goldabbau in der rum{\"a}nischen Stadt Baia Mare, der unter anderem unter dem Einsatz von Natriumzyanid erfolgte und zu wesentlichen Schadstoffbelastungen f{\"u}hrte. Der EGMR bejahte unter Verweis auf das Vorsorgeprinzip eine Verletzung von Art. 8 EMRK, obwohl der Beschwerdef{\"u}hrer die Kausalit{\"a}t zwischen der Schadstoffbelastung und der behaupteten Sch{\"a}digung nicht nachweisen konnte. Eine Analyse der nachfolgenden Entscheidungen veranschaulicht jedoch, dass sich das Vorsorgeprinzip noch nicht als fixer Bestandteil in der Rechtsprechung des EGMR etablieren konnte. Abschließend wird gezeigt, welchen Beitrag das Vorsorgeprinzip zu der bisher wohl erfolgreichsten Klimaklage „Urgenda" leistete. Das Vorsorgeprinzip wurde vom niederl{\"a}ndischen H{\"o}chstgericht in diesem Fall insbesondere herangezogen, um Schutzpflichten aus Art. 2 und Art. 8 EMRK abzuleiten und den staatlichen Ermessenspielraum einzuschr{\"a}nken.}, language = {de} } @article{GhassemiOpitzBraemeretal.2023, author = {Ghassemi, Novid and Opitz, Ben and Br{\"a}mer, Martin and Gasparjan, David and Sambanis, Michaela and K{\"o}ster, Hilde and L{\"u}cke, Martin and Nordmeier, Volkhard}, title = {Das „Lehr-Lern-Labor" als Lehrkonzept zur F{\"o}rderung einer reflexiven Haltung bei Lehramtsstudent:nnen unterschiedlicher F{\"a}cher}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63192}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631924}, pages = {389 -- 396}, year = {2023}, abstract = {Eine reflexive Haltung gegen{\"u}ber der eigenen Lehrt{\"a}tigkeit gilt als Schl{\"u}sselqualifikation in Bezug auf die Professionalisierung von Lehrer:innen in allen Didaktiken (GFD, 2004, S. 4). Das universit{\"a}re Seminarformat Lehr-Lern-Labor (LLLS) kann diese Haltung f{\"o}rdern (Rehfeldt et al., 2018). Das Lehrformat eignet sich außerdem zur Steigerung des Professionswissens und der unterrichtlichen Handlungsf{\"a}higkeit angehender Lehrer:innen (Rehfeldt et al., 2020; Br{\"a}mer \& K{\"o}ster, 2021). Dieser Beitrag stellt, neben der grunds{\"a}tzlichen Konzeption des Seminarformats, dessen Implementierung in vier verschiedenen Fachdidaktiken (Didaktiken des Englischen, der Geschichte, der Physik und Sachunterricht und seine Didaktik) vor. Ein Fokus liegt dabei auf der unterschiedlichen Umsetzung der Reflexionsphasen.}, language = {de} } @phdthesis{Schwetlick2023, author = {Schwetlick, Lisa}, title = {Data assimilation for neurocognitive models of eye movement}, doi = {10.25932/publishup-59828}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-598280}, school = {Universit{\"a}t Potsdam}, pages = {x, 209}, year = {2023}, abstract = {Visual perception is a complex and dynamic process that plays a crucial role in how we perceive and interact with the world. The eyes move in a sequence of saccades and fixations, actively modulating perception by moving different parts of the visual world into focus. Eye movement behavior can therefore offer rich insights into the underlying cognitive mechanisms and decision processes. Computational models in combination with a rigorous statistical framework are critical for advancing our understanding in this field, facilitating the testing of theory-driven predictions and accounting for observed data. In this thesis, I investigate eye movement behavior through the development of two mechanistic, generative, and theory-driven models. The first model is based on experimental research regarding the distribution of attention, particularly around the time of a saccade, and explains statistical characteristics of scan paths. The second model implements a self-avoiding random walk within a confining potential to represent the microscopic fixational drift, which is present even while the eye is at rest, and investigates the relationship to microsaccades. Both models are implemented in a likelihood-based framework, which supports the use of data assimilation methods to perform Bayesian parameter inference at the level of individual participants, analyses of the marginal posteriors of the interpretable parameters, model comparisons, and posterior predictive checks. The application of these methods enables a thorough investigation of individual variability in the space of parameters. Results show that dynamical modeling and the data assimilation framework are highly suitable for eye movement research and, more generally, for cognitive modeling.}, language = {en} } @phdthesis{Freisleben2023, author = {Freisleben, Roland}, title = {Deciphering the mechanisms of permanent forearc deformation based on marine terraces}, doi = {10.25932/publishup-61035}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-610359}, school = {Universit{\"a}t Potsdam}, pages = {xiv, 153}, year = {2023}, abstract = {The Andes reflect Cenozoic deformation and uplift along the South American margin in the context of regional shortening associated with the interaction between the subducting Nazca plate and the overriding continental South American plate. Simultaneously, multiple levels of uplifted marine terraces constitute laterally continuous geomorphic features related to the accumulation of permanent forearc deformation in the coastal realm. However, the mechanisms responsible for permanent coastal uplift and the persistency of current/decadal deformation patterns over millennial timescales are still not fully understood. This dissertation presents a continental-scale database of last interglacial terrace elevations and uplift rates along the South American coast that provides the basis for an analysis of a variety of mechanisms that are possibly responsible for the accumulation of permanent coastal uplift. Regional-scale mapping and analysis of multiple, late Pleistocene terrace levels in central Chile furthermore provide valuable insights regarding the persistency of current seismic asperities, the role of upper-plate faulting, and the impact of bathymetric ridges on permanent forearc deformation. The database of last interglacial terrace elevations reveals an almost continuous signal of background-uplift rates along the South American coast at ~0.22 mm/yr that is modified by various short- to long-wavelength changes. Spatial correlations with crustal faults and subducted bathymetric ridges suggest long-term deformation to be affected by these features, while the latitudinal variability of climate forcing factors has a profound impact on the generation and preservation of marine terraces. Systematic wavelength analyses and comparisons of the terrace-uplift rate signal with different tectonic parameters reveal short-wavelength deformation to result from crustal faulting, while intermediate- to long-wavelength deformation might indicate various extents of long-term seismotectonic segments on the megathrust, which are at least partially controlled by the subduction of bathymetric anomalies. The observed signal of background-uplift rate is likely accumulated by moderate earthquakes near the Moho, suggesting multiple, spatiotemporally distinct phases of uplift that manifest as a continuous uplift signal over millennial timescales. Various levels of late Pleistocene marine terraces in the 2015 M8.3 Illapel-earthquake area reveal a range of uplift rates between 0.1 and 0.6 mm/yr and indicate decreasing uplift rates since ~400 ka. These glacial-cycle uplift rates do not correlate with current or decadal estimates of coastal deformation suggesting seismic asperities not to be persistent features on the megathrust that control the accumulation of permanent forearc deformation over long timescales of 105 years. Trench-parallel, crustal normal faults modulate the characteristics of permanent forearc-deformation; upper-plate extension likely represents a second-order phenomenon resulting from subduction erosion and subsequent underplating that lead to regional tectonic uplift and local gravitational collapse of the forearc. In addition, variable activity with respect to the subduction of the Juan Fern{\´a}ndez Ridge can be detected in the upper plate over the course of multiple interglacial periods, emphasizing the role of bathymetric anomalies in causing local increases in terrace-uplift rate. This thesis therefore provides new insights into the current understanding of subduction-zone processes and the dynamics of coastal forearc deformation, whose different interacting forcing factors impact the topographic and geomorphic evolution of the western South American coast.}, language = {en} } @misc{RitterbuschTeichmann2023, author = {Ritterbusch, Georg David and Teichmann, Malte Rolf}, title = {Defining the metaverse}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, number = {159}, issn = {1867-5808}, doi = {10.25932/publishup-58879}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-588799}, pages = {12368 -- 12377}, year = {2023}, abstract = {The term Metaverse is emerging as a result of the late push by multinational technology conglomerates and a recent surge of interest in Web 3.0, Blockchain, NFT, and Cryptocurrencies. From a scientific point of view, there is no definite consensus on what the Metaverse will be like. This paper collects, analyzes, and synthesizes scientific definitions and the accompanying major characteristics of the Metaverse using the methodology of a Systematic Literature Review (SLR). Two revised definitions for the Metaverse are presented, both condensing the key attributes, where the first one is rather simplistic holistic describing "a three-dimensional online environment in which users represented by avatars interact with each other in virtual spaces decoupled from the real physical world". In contrast, the second definition is specified in a more detailed manner in the paper and further discussed. These comprehensive definitions offer specialized and general scholars an application within and beyond the scientific context of the system science, information system science, computer science, and business informatics, by also introducing open research challenges. Furthermore, an outlook on the social, economic, and technical implications is given, and the preconditions that are necessary for a successful implementation are discussed.}, language = {en} } @article{NeumannZauke2023, author = {Neumann, Sandra and Zauke, Svenja}, title = {Der FOCUS©-34-G als Fragebogen zur Einsch{\"a}tzung der kommunikativen Partizipation bei Kindern mit sprachlich-kommunikativem Unterst{\"u}tzungsbedarf unter sechs Jahren}, series = {Spektrum Patholinguistik 16}, journal = {Spektrum Patholinguistik 16}, number = {16}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-559-0}, issn = {1866-9433}, doi = {10.25932/publishup-61344}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-613441}, pages = {83 -- 94}, year = {2023}, abstract = {Der vorliegende Beitrag stellt die deutsche kurze Version des kommunikativen Partizipationsassessments ‚Fokus auf den Erfolg der Kommunikation f{\"u}r Kinder unter 6 Jahren (FOCUS©-34-G)' (Thomas-Stonell et al., 2012a) vor. Es werden die Entwicklung und psychometrische Validierung, Zielsetzung, Durchf{\"u}hrung und Auswertung f{\"u}r den konkreten Einsatz in der sprachtherapeutischen Praxis beschrieben.}, language = {de} } @article{Reich2023, author = {Reich, Karin}, title = {Der Humboldt'sche Magnetische Verein im historischen Kontext}, series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, volume = {XXIV}, journal = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies}, number = {46}, editor = {Ette, Ottmar and Knobloch, Eberhard}, issn = {2568-3543}, doi = {10.25932/publishup-59981}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-599818}, pages = {53 -- 74}, year = {2023}, abstract = {Der Humboldtsche Magnetische Verein (1829-1834) mit seinem Zentrum in Berlin, an dem 4 weitere Stationen mitwirkten, hatte einen Vorl{\"a}ufer, die Societas meteorologica Palatina (1780-1795). Diese verf{\"u}gte {\"u}ber 17 {\"u}ber die Nordhalbkugel verteilte Stationen, an denen magnetische Beobachtungen durchgef{\"u}hrt wurden. Der Nachfolgeverein mit 61 {\"u}ber den Globus verteilten Stationen war der G{\"o}ttinger Magnetische Verein (1834-1841). Der Humboldtsche Magnetische Verein war der erste, an dem die Gleichzeitigkeit der Beobachtungen, sog. korrespondierende Beobachtungen, anhand Berliner Zeit eingef{\"u}hrt wurden. Diese Methode wurde in G{\"o}ttingen, wo Gauß und Weber seit 1834 {\"u}ber ein Magnetisches Observatorium verf{\"u}gten, {\"u}bernommen, modifiziert und verbessert, alle 61 angeschlossenen Stationen beobachteten gem{\"a}ß G{\"o}ttinger mittlerer Zeit.}, language = {de} } @misc{Buser2023, author = {Buser, Andreas}, title = {Der Menschenrechtsausschuss der Vereinten Nationen und die Klimakrise}, series = {MenschenRechtsMagazin}, volume = {28}, journal = {MenschenRechtsMagazin}, number = {1}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2941-1149}, doi = {10.25932/publishup-58790}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-587901}, pages = {74 -- 84}, year = {2023}, abstract = {Die Entscheidung des Menschenrechtsausschusses der Vereinten Nationen im Fall Billy et al. gegen Australien zum Schutz der Beschwerdef{\"u}hrenden vor den Folgen des Klimawandels wurde als bedeutsamer Erfolg gefeiert. Der Ausschuss bewertet allerdings nur die Adaptationsmaßnahmen Australiens als unzureichend. Der Artikel untersucht, ob die Entscheidung einen Beitrag zur Weiterentwicklung des Klimaschutz- und Klimaanpassungsrechts auf Menschenrechtsebene leistet. Eine n{\"a}here Analyse der Entscheidungsgr{\"u}nde zeigt, dass sie weniger progressiv sind als teilweise angenommen. Dennoch stellt die Entscheidung einen Pr{\"a}zedenzfall dar, der angesichts der zunehmenden Bedeutung der Klimaanpassung, auch f{\"u}r nationale Gerichte und regionale Menschenrechtsgerichtsh{\"o}fe wegweisend ist.}, language = {de} } @masterthesis{Unterseher2023, type = {Bachelor Thesis}, author = {Unterseher, Lina}, title = {Der Nutzen verk{\"u}rzter Arbeitszeit mit Einkommensausgleich f{\"u}r den {\"o}ffentlichen Arbeitgeber}, doi = {10.25932/publishup-63934}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-639343}, school = {Universit{\"a}t Potsdam}, pages = {V, 30, XV}, year = {2023}, abstract = {Dieses Literatur-Review verfolgt angesichts des gegenw{\"a}rtigen, gesteigerten {\"o}ffentlichen Interesses zum Thema von Arbeitszeitverk{\"u}rzungsmodellen mit Gehaltsausgleich das Ziel, den aktuellen deutsch- und englischsprachigen Forschungsstand zum m{\"o}glichen Nutzen von Arbeitszeitverk{\"u}rzungen mit Gehaltsausgleich (AZV+) f{\"u}r den {\"o}ffentlichen Arbeitgeber dar-zustellen und kritisch auszuwerten. Das Review basiert auf insgesamt zehn Publikationen, die zum großen Teil zu dem Schluss kommen, dass AZV+ zu keinen negativen Effekten, sondern zu entweder neutralen oder auch mehrheitlich positiven Auswirkungen auf die Arbeitgebendenseite f{\"u}hren. Dabei handelt es sich insbesondere um verbesserte Stresslevel, gesundheitliche Aspekte, gleichbleibende oder erh{\"o}hte Produktivit{\"a}t und Motivation/Energie sowie verringerte Absentismuszahlen. Die Anreiz-Beitrags-Theorie bietet sich als Erkl{\"a}rungsmodell f{\"u}r diese Ergebnisse gut an, da sie Aussagen dar{\"u}ber trifft, inwiefern Anreizsysteme wie eine AZV+ f{\"u}r Arbeitnehmende durch deren subjektive Bed{\"u}rfnisbefriedigung unter Einhaltung bestimmter Grenzen (keine {\"U}berschreitung der Beitragsforderungen durch Anpassung des Workload) zu Effekten f{\"u}hren kann, die sich indirekt auch positiv hinsichtlich der Organisationsziele aus-wirken. Die ebenfalls angewandten motivationstheoretischen Elemente der Cognitive Evaluation Theory und der Motivation Crowding Theorie eignen sich weniger gut in ihrer Erkl{\"a}rungskraft der untersuchten Effekte, da die Differenzierung verschiedener Motivationsarten im Rahmen der hier untersuchten Studien unerheblich zu sein scheint. Insgesamt ist die Studienlage zu dem Thema AZV+ generell, und auch speziell im {\"o}ffentlichen Sektor, sehr d{\"u}nn und bietet kaum M{\"o}glichkeiten f{\"u}r generalisierende Aus-sagen, sodass ein großer Forschungsbedarf zu diesem Thema besteht.}, language = {de} } @misc{Zimmermann2023, type = {Master Thesis}, author = {Zimmermann, Lucas}, title = {Der Zoo: {\"U}ber einen Ausdrucksort ambivalenter Mensch-Tier-Beziehungen und dessen politisches Bildungspotenzial}, doi = {10.25932/publishup-59279}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-592790}, school = {Universit{\"a}t Potsdam}, pages = {63}, year = {2023}, abstract = {Diese Masterarbeit zielt darauf ab, exemplarisch an zoologischen G{\"a}rten f{\"u}r das politische Spannungsverh{\"a}ltnis zwischen Mensch und Tier zu sensibilisieren sowie die damit einhergehenden Aushandlungsprozesse auf individueller bzw. gesamtgesellschaftlicher Ebene didaktisch anschlussf{\"a}hig zu machen. Nach einer kurzen begrifflichen Einf{\"u}hrung der titelgebenden Termini werden in diesem Sinne vier verschiedene Ausdrucksformen ambivalenter Mensch-Tier-Beziehungen er{\"o}rtert: die Entwicklungsgeschichte und Architektur sowie die Artenschutz- bzw. Bildungsleistungen der Zoos. Dabei wird der historisch vorbelastete Balanceakt zoologischer G{\"a}rten deutlich, in Gegenwart und Zukunft menschliche und tierliche Interessen glaubhaft in Einklang bringen zu m{\"u}ssen. Als Grund{\"u}bel dieses Dilemmas wird wiederum der menschliche Anspruch identifiziert, Naturzust{\"a}nde vor dem Hintergrund eines fragw{\"u}rdigen Legitimationsnarratives kulturell nachstellen zu wollen. Außerdem entfaltet der Autor die These, dass der Zoo gerade durch die ihn pr{\"a}genden Ambivalenzen gegen{\"u}ber anderen Problembereichen der Mensch-Tier-Beziehungen an Kontroversit{\"a}t gewinnt und somit pr{\"a}destiniert ist, um als politikdidaktische Reibungsfl{\"a}che zeitgem{\"a}ßer Mensch-Tier-Beziehungen zu fungieren. Dementsprechend werden abschließend Zug{\"a}nge vorgeschlagen, um den Zoo als außerschulischen politischen Lernort vor dem Hintergrund vielf{\"a}ltiger Streitfragen erkunden und produktiv er{\"o}rtern zu k{\"o}nnen. Indem Sch{\"u}lerinnen und Sch{\"u}ler demnach die Wert- und Zweckrationalit{\"a}t der Zoos auf den Pr{\"u}fstand stellen, werden sie dazu angeregt, sich selbst- und gesellschaftskritisch mit dem politischen Verh{\"a}ltnis zwischen Tieren und Menschen auseinanderzusetzen. Die dabei exemplarisch am Zoo gewonnenen Erkenntnisse und {\"U}berzeugungen lassen sich in Bezug auf die ebenso dr{\"a}ngende wie polarisierende Tierfrage abstrahieren. Durch den somit geschaffenen Orientierungsrahmen werden die Lernenden nicht zuletzt in die Lage versetzt, ihre gereiften Vorstellungen von einem angemessenen Umgang mit (nichtmenschlichen) Tieren {\"o}ffentlich zu vertreten.}, language = {de} } @misc{Justiz2023, type = {Master Thesis}, author = {Justiz, Pia}, title = {Der Zusammenhang von Einstellungs{\"a}nderungen zum gemeinsamen Lernen und den Selbstwirksamkeits{\"a}nderungen von Kindern mit Unterst{\"u}tzungsbedarf}, doi = {10.25932/publishup-61161}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-611614}, school = {Universit{\"a}t Potsdam}, pages = {ii, 61}, year = {2023}, abstract = {Der gemeinsame Unterricht im Land Brandenburg ist bestrebt, Schule inklusiv zu gestalten, um alle Sch{\"u}ler:innen individuell bestm{\"o}glich zu f{\"o}rdern. Die Perspektive der Kinder mit Unterst{\"u}tzungsbedarf auf den gemeinsamen Unterricht wurde bislang nur selten erhoben, h{\"a}ufig sind Sch{\"u}ler:innen mit Unterst{\"u}tzungsbedarf eher Gegenstand der Untersuchungen. Mithilfe der Daten von N = 181 Viert- und F{\"u}nftkl{\"a}ssler:innen sollten die Fragen beantwortet werden, wie sich Kinder mit (n = 61) und ohne (n = 120) Unterst{\"u}tzungsbedarf bez{\"u}glich der Einstellungen zum gemeinsamen Lernen unterscheiden, wie sich ihre allgemeine sowie gruppenspezifische Selbstwirksamkeit unterscheidet und ver{\"a}ndert, wenn durch die Intervention „Soziale Entwicklung beim gemeinsamen Lernen" eine Einstellungsverbesserung erreicht wurde. Dabei wurden die Kinder mit Unterst{\"u}tzungsbedarf nach den Gruppen Unterst{\"u}tzungsbedarf emotionale und soziale Entwicklung (n = 28) sowie Unterst{\"u}tzungsbedarfen Lernen und Sprache (n = 32) unterschieden, um eine differenzierte Darstellung zu erreichen. Der Vergleich der Mittelwertsunterschiede zwischen den Gruppen ergab signifikante Unterschiede in der allgemeinen Selbstwirksamkeit zugunsten der Kinder ohne Unterst{\"u}tzungsbedarf. Der Vergleich der Mittelwertsunterschiede zu den Messzeitpunkten vor und nach der Intervention ergab eine signifikante Verbesserung der Einstellungen von Kindern mit Unterst{\"u}tzungsbedarf, wobei sich durch eine Regressionsanalyse zeigte, dass diese keinen Einfluss auf die Selbstwirksamkeit der Sch{\"u}ler:innen hatte. Dennoch zeigt die vorliegende Arbeit auf, dass der gemeinsame Unterricht aus Sch{\"u}ler:innenperspektive differenzierter untersucht werden muss und die personalen Kompetenzen von Kindern mit Unterst{\"u}tzungsbedarf gest{\"a}rkt werden m{\"u}ssen.}, language = {de} } @article{MeierKuethScholletal.2023, author = {Meier, Jana and K{\"u}th, Simon and Scholl, Daniel and Vogelsang, Christoph and Watson, Christina}, title = {Der Zyklus von Planung und Reflexion}, series = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, journal = {Reflexion in der Lehrkr{\"a}ftebildung: Empirisch - Phasen{\"u}bergreifend - Interdisziplin{\"a}r (Potsdamer Beitr{\"a}ge zur Lehrerbildung und Bildungsforschung ; 4)}, number = {4}, editor = {Mientus, Lukas and Klempin, Christiane and Nowak, Anna}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-566-8}, issn = {2626-3556}, doi = {10.25932/publishup-63142}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-631422}, pages = {233 -- 239}, year = {2023}, abstract = {Auf der Zeitachse von Zyklusmodellen des Unterrichts wird der Handlungsreflexion eine zentrale Bedeutung zugesprochen: Vor seiner Umsetzung im Unterricht soll das kommende Handeln zun{\"a}chst in einer antizipierenden Reflexion gedanklich entworfen werden, um seine Erfolgswahrscheinlichkeit zu erh{\"o}hen. Nach dem Unterricht soll es einer retrospektiven Reflexion unterzogen werden, in der die Handlungsumsetzung vor dem Hintergrund der Handlungsplanung evaluiert wird und Konsequenzen f{\"u}r k{\"u}nftige Handlungsplanungen gezogen werden. Trotz der Plausibilit{\"a}t dieses postulierten Zusammenhangs von antizipierender und retrospektiver Reflexion steht seine genauere empirische Untersuchung allerdings noch aus. In einer querschnittlichen Onlineerhebung werden diese beiden Reflexionsformen deshalb als generische Unterrichtsplanungsf{\"a}higkeit und Reflexionskompetenz spezifiziert, um ihren Zusammenhang mit Hilfe einer Stichprobe von angehenden Lehrkr{\"a}ften (N = 479) aus zwei Universit{\"a}ten zu explorieren. Die gefundenen schwachen Zusammenh{\"a}nge werden vor dem Hintergrund der Operationalisierungen und der Testmotivation der Teilnehmenden diskutiert.}, language = {de} } @article{GiannatelliTomasini2023, author = {Giannatelli, Ada and Tomasini, Alessandra}, title = {Descriptors and EU Standards to support the recognition of MOOCs}, series = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, journal = {EMOOCs 2023 : Post-Covid Prospects for Massive Open Online Courses - Boost or Backlash?}, editor = {Meinel, Christoph and Schweiger, Stefanie and Staubitz, Thomas and Conrad, Robert and Alario Hoyos, Carlos and Ebner, Martin and Sancassani, Susanna and Żur, Agnieszka and Friedl, Christian and Halawa, Sherif and Gamage, Dilrukshi and Scott, Jeffrey and Kristine Jonson Carlon, May and Deville, Yves and Gaebel, Michael and Delgado Kloos, Carlos and von Schmieden, Karen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, doi = {10.25932/publishup-62396}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-623967}, pages = {133 -- 146}, year = {2023}, abstract = {Digital technologies have enabled a variety of learning offers that opened new challenges in terms of recognition of formal, informal and non-formal learning, such as MOOCs. This paper focuses on how providing relevant data to describe a MOOC is conducive to increase the transparency of information and, ultimately, the flexibility of European higher education. The EU-funded project ECCOE took up these challenges and developed a solution by identifying the most relevant descriptors of a learning opportunity with a view to supporting a European system for micro-credentials. Descriptors indicate the specific properties of a learning opportunity according to European standards. They can provide a recognition framework also for small volumes of learning (micro-credentials) to support the integration of non-formal learning (MOOCs) into formal learning (e.g. institutional university courses) and to tackle skills shortage, upskilling and reskilling by acquiring relevant competencies. The focus on learning outcomes can facilitate the recognition of skills and competences of students and enhance both virtual and physical mobility and employability. This paper presents two contexts where ECCOE descriptors have been adopted: the Politecnico di Milano MOOC platform (Polimi Open Knowledge - POK), which is using these descriptors as the standard information to document the features of its learning opportunities, and the EU-funded Uforest project on urban forestry, which developed a blended training program for students of partner universities whose MOOCs used the ECCOE descriptors. Practice with ECCOE descriptors shows how they can be used not only to detail MOOC features, but also as a compass to design the learning offer. In addition, some rules of thumb can be derived and applied when using specific descriptors.}, language = {en} } @misc{DragičevićVladovaUllrich2023, author = {Dragičević, Nikolina and Vladova, Gergana and Ullrich, Andr{\´e}}, title = {Design thinking capabilities in the digital world}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, number = {158}, issn = {1867-5808}, doi = {10.25932/publishup-58846}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-588468}, pages = {18}, year = {2023}, abstract = {Recent research suggests that design thinking practices may foster the development of needed capabilities in new digitalised landscapes. However, existing publications represent individual contributions, and we lack a holistic understanding of the value of design thinking in a digital world. No review, to date, has offered a holistic retrospection of this research. In response, in this bibliometric review, we aim to shed light on the intellectual structure of multidisciplinary design thinking literature related to capabilities relevant to the digital world in higher education and business settings, highlight current trends and suggest further studies to advance theoretical and empirical underpinnings. Our study addresses this aim using bibliometric methods—bibliographic coupling and co-word analysis as they are particularly suitable for identifying current trends and future research priorities at the forefront of the research. Overall, bibliometric analyses of the publications dealing with the related topics published in the last 10 years (extracted from the Web of Science database) expose six trends and two possible future research developments highlighting the expanding scope of the design thinking scientific field related to capabilities required for the (more sustainable and human-centric) digital world. Relatedly, design thinking becomes a relevant approach to be included in higher education curricula and human resources training to prepare students and workers for the changing work demands. This paper is well-suited for education and business practitioners seeking to embed design thinking capabilities in their curricula and for design thinking and other scholars wanting to understand the field and possible directions for future research.}, language = {en} } @misc{RoeschTiberiusKraus2023, author = {R{\"o}sch, Nicolas and Tiberius, Victor and Kraus, Sascha}, title = {Design thinking for innovation}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe}, number = {7}, issn = {1460-1060}, doi = {10.25932/publishup-60834}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-608341}, pages = {19}, year = {2023}, abstract = {Purpose - Design thinking has become an omnipresent process to foster innovativeness in various fields. Due to its popularity in both practice and theory, the number of publications has been growing rapidly. The authors aim to develop a research framework that reflects the current state of research and allows for the identification of research gaps. Design/methodology/approach - The authors conduct a systematic literature review based on 164 scholarly articles on design thinking. Findings - This study proposes a framework, which identifies individual and organizational context factors, the stages of a typical design thinking process with its underlying principles and tools, and the individual as well as organizational outcomes of a design thinking project. Originality/value - Whereas previous reviews focused on particular aspects of design thinking, such as its characteristics, the organizational culture as a context factor or its role on new product development, the authors provide a holistic overview of the current state of research.}, language = {en} } @phdthesis{Traifeh2023, author = {Traifeh, Hanadi}, title = {Design Thinking in the Arab world}, doi = {10.25932/publishup-59891}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-598911}, school = {Universit{\"a}t Potsdam}, pages = {ix, 196}, year = {2023}, abstract = {Design Thinking is a human-centered approach to innovation that has become increasingly popular globally over the last decade. While the spread of Design Thinking is well understood and documented in the Western cultural contexts, particularly in Europe and the US due to the popularity of the Stanford-Potsdam Design Thinking education model, this is not the case when it comes to non-Western cultural contexts. This thesis fills a gap identified in the literature regarding how Design Thinking emerged, was perceived, adopted, and practiced in the Arab world. The culture in that part of the world differs from that of the Western context, which impacts the mindset of people and how they interact with Design Thinking tools and methods. A mixed-methods research approach was followed in which both quantitative and qualitative methods were employed. First, two methods were used in the quantitative phase: a social media analysis using Twitter as a source of data, and an online questionnaire. The results and analysis of the quantitative data informed the design of the qualitative phase in which two methods were employed: ten semi-structured interviews, and participant observation of seven Design Thinking training events. According to the analyzed data, the Arab world appears to have had an early, though relatively weak, and slow, adoption of Design Thinking since 2006. Increasing adoption, however, has been witnessed over the last decade, especially in Saudi Arabia, the United Arab Emirates and Egypt. The results also show that despite its limited spread, Design Thinking has been practiced the most in education, information technology and communication, administrative services, and the non-profit sectors. The way it is being practiced, though, is not fully aligned with how it is being practiced and taught in the US and Europe, as most people in the region do not necessarily believe in all mindset attributes introduced by the Stanford-Potsdam tradition. Practitioners in the Arab world also seem to shy away from the 'wild side' of Design Thinking in particular, and do not fully appreciate the connection between art-design, and science-engineering. This questions the role of the educational institutions in the region since -according to the findings- they appear to be leading the movement in promoting and developing Design Thinking in the Arab world. Nonetheless, it is notable that people seem to be aware of the positive impact of applying Design Thinking in the region, and its potential to bring meaningful transformation. However, they also seem to be concerned about the current cultural, social, political, and economic challenges that may challenge this transformation. Therefore, they call for more awareness and demand to create Arabic, culturally appropriate programs to respond to the local needs. On another note, the lack of Arabic content and local case studies on Design Thinking were identified by several interviewees and were also confirmed by the participant observation as major challenges that are slowing down the spread of Design Thinking or sometimes hampering capacity building in the region. Other challenges that were revealed by the study are: changing the mindset of people, the lack of dedicated Design Thinking spaces, and the need for clear instructions on how to apply Design Thinking methods and activities. The concept of time and how Arabs deal with it, gender management during trainings, and hierarchy and power dynamics among training participants are also among the identified challenges. Another key finding revealed by the study is the confirmation of التفكير التصميمي as the Arabic term to be most widely adopted in the region to refer to Design Thinking, since four other Arabic terms were found to be associated with Design Thinking. Based on the findings of the study, the thesis concludes by presenting a list of recommendations on how to overcome the mentioned challenges and what factors should be considered when designing and implementing culturally-customized Design Thinking training in the Arab region.}, language = {en} } @phdthesis{Santuber2023, author = {Santuber, Joaquin}, title = {Designing for digital justice}, doi = {10.25932/publishup-60417}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-604178}, school = {Universit{\"a}t Potsdam}, pages = {xviii, 183}, year = {2023}, abstract = {At the beginning of 2020, with COVID-19, courts of justice worldwide had to move online to continue providing judicial service. Digital technologies materialized the court practices in ways unthinkable shortly before the pandemic creating resonances with judicial and legal regulation, as well as frictions. A better understanding of the dynamics at play in the digitalization of courts is paramount for designing justice systems that serve their users better, ensure fair and timely dispute resolutions, and foster access to justice. Building on three major bodies of literature —e-justice, digitalization and organization studies, and design research— Designing for Digital Justice takes a nuanced approach to account for human and more-than-human agencies. Using a qualitative approach, I have studied in depth the digitalization of Chilean courts during the pandemic, specifically between April 2020 and September 2022. Leveraging a comprehensive source of primary and secondary data, I traced back the genealogy of the novel materializations of courts' practices structured by the possibilities offered by digital technologies. In five (5) cases studies, I show in detail how the courts got to 1) work remotely, 2) host hearings via videoconference, 3) engage with users via social media (i.e., Facebook and Chat Messenger), 4) broadcast a show with judges answering questions from users via Facebook Live, and 5) record, stream, and upload judicial hearings to YouTube to fulfil the publicity requirement of criminal hearings. The digitalization of courts during the pandemic is characterized by a suspended normativity, which makes innovation possible yet presents risks. While digital technologies enabled the judiciary to provide services continuously, they also created the risk of displacing traditional judicial and legal regulation. Contributing to liminal innovation and digitalization research, Designing for Digital Justice theorizes four phases: 1) the pre-digitalization phase resulting in the development of regulation, 2) the hotspot of digitalization resulting in the extension of regulation, 3) the digital innovation redeveloping regulation (moving to a new, preliminary phase), and 4) the permanence of temporal practices displacing regulation. Contributing to design research Designing for Digital Justice provides new possibilities for innovation in the courts, focusing at different levels to better address tensions generated by digitalization. Fellow researchers will find in these pages a sound theoretical advancement at the intersection of digitalization and justice with novel methodological references. Practitioners will benefit from the actionable governance framework Designing for Digital Justice Model, which provides three fields of possibilities for action to design better justice systems. Only by taking into account digital, legal, and social factors can we design better systems that promote access to justice, the rule of law, and, ultimately social peace.}, language = {en} } @article{StudemundHalevy2023, author = {Studemund-Hal{\´e}vy, Michael}, title = {Desperados at Sea}, series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, journal = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, number = {28}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-552-1}, issn = {1614-6492}, doi = {10.25932/publishup-58579}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-585796}, pages = {100 -- 115}, year = {2023}, abstract = {Pirates are fortune-seeking fighters at sea. Their exploits fire the imaginations of their victims and admirers, drawing a veil over individuals who rarely bear a real name and pursue their adventurous occupations as buccaneers, filibusters, freebooters, privateers, pirates, or corsairs. Piracy, corsairing, and contraband trade were epidemic among the Egyptians and the Phoenicians, the Greeks and the Vikings, the Spaniards and the Ottomans, the Muslims, and the Christians. And the Jews.}, language = {en} } @phdthesis{Malchow2023, author = {Malchow, Anne-Kathleen}, title = {Developing an integrated platform for predicting niche and range dynamics}, doi = {10.25932/publishup-60273}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-602737}, school = {Universit{\"a}t Potsdam}, pages = {xiv, 169}, year = {2023}, abstract = {Species are adapted to the environment they live in. Today, most environments are subjected to rapid global changes induced by human activity, most prominently land cover and climate changes. Such transformations can cause adjustments or disruptions in various eco-evolutionary processes. The repercussions of this can appear at the population level as shifted ranges and altered abundance patterns. This is where global change effects on species are usually detected first. To understand how eco-evolutionary processes act and interact to generate patterns of range and abundance and how these processes themselves are influenced by environmental conditions, spatially-explicit models provide effective tools. They estimate a species' niche as the set of environmental conditions in which it can persist. However, the currently most commonly used models rely on static correlative associations that are established between a set of spatial predictors and observed species distributions. For this, they assume stationary conditions and are therefore unsuitable in contexts of global change. Better equipped are process-based models that explicitly implement algorithmic representations of eco-evolutionary mechanisms and evaluate their joint dynamics. These models have long been regarded as difficult to parameterise, but an increased data availability and improved methods for data integration lessen this challenge. Hence, the goal of this thesis is to further develop process-based models, integrate them into a complete modelling workflow, and provide the tools and guidance for their successful application. With my thesis, I presented an integrated platform for spatially-explicit eco-evolutionary modelling and provided a workflow for their inverse calibration to observational data. In the first chapter, I introduced RangeShiftR, a software tool that implements an individual-based modelling platform for the statistical programming language R. Its open-source licensing, extensive help pages and available tutorials make it accessible to a wide audience. In the second chapter, I demonstrated a comprehensive workflow for the specification, calibration and validation of RangeShiftR by the example of the red kite in Switzerland. The integration of heterogeneous data sources, such as literature and monitoring data, allowed to successfully calibrate the model. It was then used to make validated, spatio-temporal predictions of future red kite abundance. The presented workflow can be adopted to any study species if data is available. In the third chapter, I extended RangeShiftR to directly link demographic processes to climatic predictors. This allowed me to explore the climate-change responses of eight Swiss breeding birds in more detail. Specifically, the model could identify the most influential climatic predictors, delineate areas of projected demographic suitability, and attribute current population trends to contemporary climate change. My work shows that the application of complex, process-based models in conservation-relevant contexts is feasible, utilising available tools and data. Such models can be successfully calibrated and outperform other currently used modelling approaches in terms of predictive accuracy. Their projections can be used to predict future abundances or to assess alternative conservation scenarios. They further improve our mechanistic understanding of niche and range dynamics under climate change. However, only fully mechanistic models, that include all relevant processes, allow to precisely disentangle the effects of single processes on observed abundances. In this respect, the RangeShiftR model still has potential for further extensions that implement missing influential processes, such as species interactions. Dynamic, process-based models are needed to adequately model a dynamic reality. My work contributes towards the advancement, integration and dissemination of such models. This will facilitate numeric, model-based approaches for species assessments, generate ecological insights and strengthen the reliability of predictions on large spatial scales under changing conditions.}, language = {en} } @phdthesis{Riedel2023, author = {Riedel, Soraya Lisanne}, title = {Development of electrochemical antibody-based and enzymatic assays for mycotoxin analysis in food}, doi = {10.25932/publishup-60747}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-607477}, school = {Universit{\"a}t Potsdam}, pages = {XV, 95}, year = {2023}, abstract = {Electrochemical methods are promising to meet the demand for easy-to-use devices monitoring key parameters in the food industry. Many companies run own lab procedures for mycotoxin analysis, but it is a major goal to simplify the analysis. The enzyme-linked immunosorbent assay using horseradish peroxidase as enzymatic label, together with 3,3',5,5' tetramethylbenzidine (TMB)/H2O2 as substrates allows sensitive mycotoxin detection with optical detection methods. For the miniaturization of the detection step, an electrochemical system for mycotoxin analysis was developed. To this end, the electrochemical detection of TMB was studied by cyclic voltammetry on different screen-printed electrodes (carbon and gold) and at different pH values (pH 1 and pH 4). A stable electrode reaction, which is the basis for the further construction of the electrochemical detection system, could be achieved at pH 1 on gold electrodes. An amperometric detection method for oxidized TMB, using a custom-made flow cell for screen-printed electrodes, was established and applied for a competitive magnetic bead-based immunoassay for the mycotoxin ochratoxin A. A limit of detection of 150 pM (60 ng/L) could be obtained and the results were verified with optical detection. The applicability of the magnetic bead-based immunoassay was tested in spiked beer using a handheld potentiostat connected via Bluetooth to a smartphone for amperometric detection allowing to quantify ochratoxin A down to 1.2 nM (0.5 µg/L). Based on the developed electrochemical detection system for TMB, the applicability of the approach was demonstrated with a magnetic bead-based immunoassay for the ergot alkaloid, ergometrine. Under optimized assay conditions a limit of detection of 3 nM (1 µg/L) was achieved and in spiked rye flour samples ergometrine levels in a range from 25 to 250 µg/kg could be quantified. All results were verified with optical detection. The developed electrochemical detection method for TMB gives great promise for the detection of TMB in many other HRP-based assays. A new sensing approach, based on an enzymatic electrochemical detection system for the mycotoxin fumonisin B1 was established using an Aspergillus niger fumonisin amine oxidase (AnFAO). AnFAO was produced recombinantly in E. coli as maltose-binding protein fusion protein and catalyzes the oxidative deamination of fumonisins, producing hydrogen peroxide. It was found that AnFAO has a high storage and temperature stability. The enzyme was coupled covalently to magnetic particles, and the enzymatically produced H2O2 in the reaction with fumonisin B1 was detected amperometrically in a flow injection system using Prussian blue/carbon electrodes and the custom-made wall-jet flow cell. Fumonisin B1 could be quantified down to 1.5 µM (≈ 1 mg/L). The developed system represents a new approach to detect mycotoxins using enzymes and electrochemical methods.}, language = {en} }