@phdthesis{Rehtmeyer2024, author = {Rehtmeyer, Marcus}, title = {Die Staatskirchenvertr{\"a}ge Preußens 1929 und 1931}, series = {Rechtsgeschichtliche Forschungen}, volume = {4}, journal = {Rechtsgeschichtliche Forschungen}, publisher = {Nomos}, address = {Baden-Baden}, isbn = {978-3-7560-1369-2}, school = {Universit{\"a}t Potsdam}, pages = {734}, year = {2024}, abstract = {Die umfangreiche rechtswissenschaftliche Studie befasst sich mit den preußischen Staatskirchenvertr{\"a}gen aus der Zeit der Weimarer Republik. Diese Vertr{\"a}ge waren H{\"o}hepunkte einer Entwicklung in Richtung gr{\"o}ßerer Freiheit und Unabh{\"a}ngigkeit der Kirchen vom Staat, die den Vorg{\"a}ngen im Reich und in anderen deutschen L{\"a}ndern teils entsprach, teils zuwiderlief. Die Entwicklung folgte keiner unverr{\"u}ckbaren Idealvorstellung {\"u}ber das Verh{\"a}ltnis von Staat und Kirche, sondern stellte sich stets als pragmatische Reaktion auf realpolitische Probleme dar. Die Staatskirchenvertr{\"a}ge selbst pr{\"a}gten die weiteren Entwicklungen in Ost und West bis zur Gegenwart.}, language = {de} } @phdthesis{You2024, author = {You, Lili}, title = {Chloroplast engineering for recombinant protein production and stress protection}, school = {Universit{\"a}t Potsdam}, pages = {133}, year = {2024}, language = {en} } @misc{Ganzer2024, type = {Master Thesis}, author = {Ganzer, Carolin}, title = {Sprachvernetzende Inhalte in den Franz{\"o}sischlehrwerken D{\´e}couvertes und {\`A} plus als Baustein der Mehrsprachigkeitsf{\"o}rderung}, doi = {10.25932/publishup-62318}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-623188}, school = {Universit{\"a}t Potsdam}, pages = {II, 79, XIII}, year = {2024}, abstract = {Die vorliegende Masterarbeit widmet sich der Frage, inwiefern die neuesten Lehrwerke f{\"u}r den gymnasialen Franz{\"o}sischunterricht, D{\´e}couvertes 1 (Klett) und {\`A} plus 1 (Cornelsen) aus dem Jahr 2020, sprachvernetzende Inhalte nutzen, um auf vorgelernte Sprachen und fr{\"u}here Spracherwerbsprozesse hinzuweisen oder darauf zur{\"u}ckzugreifen. Der Fokus liegt dabei auf der Schul- und/oder Erstsprache Deutsch sowie der ersten Fremdsprache Englisch, wobei auch andere auftretende Sprachen in die Untersuchung einbezogen werden. Die Arbeit leistet einen Beitrag zum fachdidaktischen Diskurs bez{\"u}glich mehrsprachigkeitsdidaktischer Inhalte in Fremdsprachenlehrwerken. Dar{\"u}ber hinaus kann sie Lehrkr{\"a}ften aufzeigen, wie diese aktuellen Lehrwerke ihren mehrsprachigkeitsorientierten Unterricht begleiten k{\"o}nnen. Die Einleitung betont die Relevanz der Sprachvernetzung f{\"u}r den Fremdsprachenunterricht, insbesondere im Hinblick auf die individuelle Mehrsprachigkeit der Sch{\"u}ler*innen. Es wird auf das Potenzial des interlingualen Transfers hingewiesen, das u. a. in einer Lernerleichterung sowie der F{\"o}rderung der Sprachbewusstheit und der Sprachlernbewusstheit besteht. In Kapitel 2 werden die theoretischen Grundlagen f{\"u}r die Analyse gelegt, indem Mehrsprachigkeit und Mehrsprachigkeitsdidaktik, Sprachvernetzung und ihr Potenzial n{\"a}her betrachtet werden. Zudem wird anhand des Deutschen und Englischen aufgezeigt, welches sprachliche Transferpotenzial im Anfangsunterricht Franz{\"o}sisch eingebracht werden k{\"o}nnte. Auch die Bedingungen daf{\"u}r, dass Sch{\"u}ler*innen den interlingualen Transfer in ihrem Spracherwerb einsetzen, werden besprochen. Kapitel 3 gibt einen {\"U}berblick {\"u}ber den Forschungsstand zu Sprachvernetzung und Mehrsprachigkeit in Fremdsprachenlehrwerken und identifiziert die Forschungsl{\"u}cke, die diese Arbeit zu schließen versucht. In Kapitel 4 werden die Forschungsfrage und ihre Unterfragen formuliert, die untersuchten Lehrwerke beschrieben und die Auswahl der Lehrwerke und der untersuchten Lehrwerkskomponenten begr{\"u}ndet. Zudem wird die Methodik der vergleichenden Lehrwerkanalyse erl{\"a}utert. Die Ergebnisse der Analyse werden in Kapitel 5 ausf{\"u}hrlich dargestellt. Es wird aufgezeigt, welche sprachvernetzenden Inhalte in den jeweiligen Lehrwerken vorkommen - in welcher Form und unter Einbezug welcher Sprachen und sprachlichen Ebenen. In Kapitel 6 werden die Ergebnisse diskutiert und analysiert, wobei auf die Mehrsprachigkeitskonzepte der Lehrwerke und die Trends bei den sprachvernetzenden Inhalten eingegangen wird. Im abschließenden Kapitel 7 wird zusammenfassend betont, dass beide Lehrwerke viele sprachvernetzende Inhalte anbieten, die das Potenzial haben, mehrsprachigkeitsdidaktisches Arbeiten zu unterst{\"u}tzen. Insbesondere auf der Produktionsebene werden jedoch noch zu wenige Transferprozesse initiiert. Zudem wird aufgezeigt, welche weiteren Untersuchungen erg{\"a}nzend m{\"o}glich sind, z. B. hinsichtlich des Einsatzes der sprachvernetzenden Inhalte im Unterricht.}, language = {de} } @misc{CarlaUhink2024, author = {Carl{\`a}-Uhink, Filippo}, title = {Rezension zu: Emmelius, Daniel: Das Pomerium : Geschriebene Grenze des antiken Rom. - G{\"o}ttingen : Verlag Antike, 2021. - 411 S. Gr.-8° (Studien zur Alten Geschichte; 30)}, series = {Anzeiger f{\"u}r die Altertumswissenschaft}, volume = {76}, journal = {Anzeiger f{\"u}r die Altertumswissenschaft}, number = {2}, publisher = {Leopold-Franzens-Universit{\"a}t Innsbruck, Institut f{\"u}r Sprachen und Literaturen, Bereich Latinistik/Gr{\"a}zistik}, address = {Innsbruck}, issn = {0003-6293}, doi = {10.25651/3.4555861}, url = {http://nbn-resolving.de/urn:nbn:at:at-ubi:4-10771}, pages = {64 -- 69}, year = {2024}, language = {de} } @inproceedings{WinterBenderAier2024, author = {Winter, Robert and Bender, Benedict and Aier, Stephan}, title = {Enterprise-level IS research - need, conceptualization, exemplary knowledge contributions and future opportunities}, series = {Proceedings of the 57th Annual Hawaii International Conference on System Sciences}, booktitle = {Proceedings of the 57th Annual Hawaii International Conference on System Sciences}, editor = {Bui, Tung X.}, publisher = {Hawaii International Conference on System Sciences}, address = {Honolulu, HI}, isbn = {978-0-9981331-7-1}, pages = {6402 -- 6411}, year = {2024}, abstract = {Enterprise solutions, specifically enterprise systems, have allowed companies to integrate enterprises' operations throughout. The integration scope of enterprise solutions has increasingly widened, now often covering customer activities, activities along supply chains, and platform ecosystems. IS research has contributed a wide range of explanatory and design knowledge dealing with this class of IS. During the last two decades, many technological as well as managerial/organizational innovations extended the affordances of enterprise solutions—but this broader scope also challenges traditional approaches to their analysis and design. This position paper presents an enterprise-level (i.e., cross-solution) perspective on IS, discusses the challenges of complexity and coordination for IS design and management, presents selected enterprise-level insights for IS coordination and governance, and explores avenues towards a more comprehensive body of knowledge on this important level of analysis.}, language = {en} } @article{BussKearney2024, author = {Buss, Martin and Kearney, Eric}, title = {Navigating the unknown}, series = {Journal of occupational and organizational psychology}, journal = {Journal of occupational and organizational psychology}, publisher = {Wiley}, address = {Hoboken, NJ}, issn = {0963-1798}, doi = {10.1111/joop.12500}, pages = {7}, year = {2024}, abstract = {Visionary leadership is considered to be one of the most important elements of effective leadership. Among other things, it is related to followers' perceived meaningfulness of their work. However, little is known about whether uncertainty in the workplace affects visionary leadership's effects. Given that uncertainty is rising in many, if not most, workplaces, it is vital to understand whether this development influences the extent to which visionary leadership is associated with followers' perceived meaningfulness. In a two-source, lagged design field study of 258 leader-follower dyads from different settings, we show that uncertainty moderates the relation between visionary leadership and followers' perceived meaningfulness such that this relation is more strongly positive when uncertainty is high, rather than low. Moreover, we show that with increasing uncertainty, visionary leadership is more negatively related to followers' turnover intentions via perceived meaningfulness. This research broadens our understanding of how visionary leadership may be a particularly potent tool in times of increasing uncertainty.}, language = {en} } @inproceedings{BenderWinterSchmidtetal.2024, author = {Bender, Benedict and Winter, Robert and Schmidt, Pamela and Narasimhan, Sathya}, title = {Minitrack introduction: Enterprise Ecosystems}, series = {Proceedings of the 57th Annual Hawaii International Conference on System Sciences}, booktitle = {Proceedings of the 57th Annual Hawaii International Conference on System Sciences}, editor = {Bui, Tung X.}, publisher = {Hawaii International Conference on System Sciences}, address = {Honolulu, HI}, isbn = {978-0-9981331-7-1}, issn = {2572-6862}, pages = {6370 -- 6371}, year = {2024}, abstract = {While Information Systems Research exists at the individual and workgroup levels, research on IS at the enterprise level is less common. The potential synergies between the study of enterprise systems (ES) and related fields have been underexplored and often treated as separate entities. The ongoing challenge is to seamlessly integrate technological advances and align business processes across organizations. While systems integration within an organization is common, changes occur when industry and ecosystem perspectives come into play. The four selected papers address different facets of the future role of enterprise ecosystems, including implementation challenges, ecosystem boundaries, and B2B platform specifics.}, language = {en} } @phdthesis{Littmann2024, author = {Littmann, Daniela-Christin}, title = {Large eddy simulations of the Arctic boundary layer around the MOSAiC drift track}, doi = {10.25932/publishup-62437}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624374}, school = {Universit{\"a}t Potsdam}, pages = {xii, 110}, year = {2024}, abstract = {The icosahedral non-hydrostatic large eddy model (ICON-LEM) was applied around the drift track of the Multidisciplinary Observatory Study of the Arctic (MOSAiC) in 2019 and 2020. The model was set up with horizontal grid-scales between 100m and 800m on areas with radii of 17.5km and 140 km. At its lateral boundaries, the model was driven by analysis data from the German Weather Service (DWD), downscaled by ICON in limited area mode (ICON-LAM) with horizontal grid-scale of 3 km. The aim of this thesis was the investigation of the atmospheric boundary layer near the surface in the central Arctic during polar winter with a high-resolution mesoscale model. The default settings in ICON-LEM prevent the model from representing the exchange processes in the Arctic boundary layer in accordance to the MOSAiC observations. The implemented sea-ice scheme in ICON does not include a snow layer on sea-ice, which causes a too slow response of the sea-ice surface temperature to atmospheric changes. To allow the sea-ice surface to respond faster to changes in the atmosphere, the implemented sea-ice parameterization in ICON was extended with an adapted heat capacity term. The adapted sea-ice parameterization resulted in better agreement with the MOSAiC observations. However, the sea-ice surface temperature in the model is generally lower than observed due to biases in the downwelling long-wave radiation and the lack of complex surface structures, like leads. The large eddy resolving turbulence closure yielded a better representation of the lower boundary layer under strongly stable stratification than the non-eddy-resolving turbulence closure. Furthermore, the integration of leads into the sea-ice surface reduced the overestimation of the sensible heat flux for different weather conditions. The results of this work help to better understand boundary layer processes in the central Arctic during the polar night. High-resolving mesoscale simulations are able to represent temporally and spatially small interactions and help to further develop parameterizations also for the application in regional and global models.}, language = {en} } @phdthesis{Schaumburg2024, author = {Schaumburg, Josephine}, title = {Men are not better negotiators after all!}, series = {Schriftenreihe zum Verhandlungsmanagement}, volume = {24}, journal = {Schriftenreihe zum Verhandlungsmanagement}, publisher = {Kovac}, address = {Hamburg}, isbn = {978-3-339-13798-2}, issn = {2365-7898}, school = {Universit{\"a}t Potsdam}, pages = {284}, year = {2024}, abstract = {This dissertation examines the lack of clarity in the scientific literature regarding gender and negotiation performance. It is often claimed that men negotiate better than women, yet it is simultaneously emphasized that results strongly depend on context. Through the use of qualitative methods such as content analysis and critical mixed-methods review, the research question: "Are women truly inferior negotiators compared to men?" is addressed. The study comprises a descriptive and an interpretive part. The descriptive section illuminates various interpretations of gender-specific negotiation theory among citing authors, with 67\% arguing for a general superiority of men. However, given the high variance in gender-specific differences, the focus should instead be on the context-dependency of negotiation performance. Generalized statements can be made within contexts, but not across them. In the interpretive section, several factors contributing to this misinterpretation are highlighted, including discrepancies in the definition of negotiation performance and distortions in research communication.. From a scientific perspective, this study underscores the need for a nuanced sociological analysis and warns against the one-sided acceptance of inaccurate scientific interpretations. From a practical standpoint, it amplifies the voices of women affected by biased research paradigms. Overall, the dissertation clarifies the theory of gender-specific negotiation performance and advocates for the elimination of biases in scientific discourse.}, language = {en} } @phdthesis{WindirschWoiwode2024, author = {Windirsch-Woiwode, Torben}, title = {Permafrost carbon stabilisation by recreating a herbivore-driven ecosystem}, doi = {10.25932/publishup-62424}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-624240}, school = {Universit{\"a}t Potsdam}, pages = {X, 104, A-57}, year = {2024}, abstract = {With Arctic ground as a huge and temperature-sensitive carbon reservoir, maintaining low ground temperatures and frozen conditions to prevent further carbon emissions that contrib-ute to global climate warming is a key element in humankind's fight to maintain habitable con-ditions on earth. Former studies showed that during the late Pleistocene, Arctic ground condi-tions were generally colder and more stable as the result of an ecosystem dominated by large herbivorous mammals and vast extents of graminoid vegetation - the mammoth steppe. Characterised by high plant productivity (grassland) and low ground insulation due to animal-caused compression and removal of snow, this ecosystem enabled deep permafrost aggrad-ation. Now, with tundra and shrub vegetation common in the terrestrial Arctic, these effects are not in place anymore. However, it appears to be possible to recreate this ecosystem local-ly by artificially increasing animal numbers, and hence keep Arctic ground cold to reduce or-ganic matter decomposition and carbon release into the atmosphere. By measuring thaw depth, total organic carbon and total nitrogen content, stable carbon iso-tope ratio, radiocarbon age, n-alkane and alcohol characteristics and assessing dominant vegetation types along grazing intensity transects in two contrasting Arctic areas, it was found that recreating conditions locally, similar to the mammoth steppe, seems to be possible. For permafrost-affected soil, it was shown that intensive grazing in direct comparison to non-grazed areas reduces active layer depth and leads to higher TOC contents in the active layer soil. For soil only frozen on top in winter, an increase of TOC with grazing intensity could not be found, most likely because of confounding factors such as vertical water and carbon movement, which is not possible with an impermeable layer in permafrost. In both areas, high animal activity led to a vegetation transformation towards species-poor graminoid-dominated landscapes with less shrubs. Lipid biomarker analysis revealed that, even though the available organic material is different between the study areas, in both permafrost-affected and sea-sonally frozen soils the organic material in sites affected by high animal activity was less de-composed than under less intensive grazing pressure. In conclusion, high animal activity af-fects decomposition processes in Arctic soils and the ground thermal regime, visible from reduced active layer depth in permafrost areas. Therefore, grazing management might be utilised to locally stabilise permafrost and reduce Arctic carbon emissions in the future, but is likely not scalable to the entire permafrost region.}, language = {en} } @phdthesis{Schaefer2024, author = {Sch{\"a}fer, Marj{\"a}nn Helena}, title = {Untersuchungen zur Evolution der 15-Lipoxygenase (ALOX15) bei S{\"a}ugetieren und funktionelle Charakterisierung von Knock-in-M{\"a}usen mit humanisierter Reaktionsspezifit{\"a}t der 15-Lipoxygenase-2 (Alox15b)}, doi = {10.25932/publishup-62034}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-620340}, school = {Universit{\"a}t Potsdam}, pages = {XVII, 280}, year = {2024}, abstract = {Arachidons{\"a}urelipoxygenasen (ALOX-Isoformen) sind Lipid-peroxidierenden Enzyme, die bei der Zelldifferenzierung und bei der Pathogenese verschiedener Erkrankungen bedeutsam sind. Im menschlichen Genom gibt es sechs funktionelle ALOX-Gene, die als Einzelkopiegene vorliegen. F{\"u}r jedes humane ALOX-Gen gibt es ein orthologes Mausgen. Obwohl sich die sechs humanen ALOX-Isoformen strukturell sehr {\"a}hnlich sind, unterscheiden sich ihre funktionellen Eigenschaften deutlich voneinander. In der vorliegenden Arbeit wurden vier unterschiedliche Fragestellungen zum Vorkommen, zur biologischen Rolle und zur Evolutionsabh{\"a}ngigkeit der enzymatischen Eigenschaften von S{\"a}ugetier-ALOX-Isoformen untersucht: 1) Spitzh{\"o}rnchen (Tupaiidae) sind evolution{\"a}r n{\"a}her mit dem Menschen verwandt als Nagetiere und wurden deshalb als Alternativmodelle f{\"u}r die Untersuchung menschlicher Erkrankungen vorgeschlagen. In dieser Arbeit wurde erstmals der Arachidons{\"a}urestoffwechsel von Spitzh{\"o}rnchen untersucht. Dabei wurde festgestellt, dass im Genom von Tupaia belangeri vier unterschiedliche ALOX15-Gene vorkommen und die Enzyme sich hinsichtlich ihrer katalytischen Eigenschaften {\"a}hneln. Diese genomische Vielfalt, die weder beim Menschen noch bei M{\"a}usen vorhanden ist, erschwert die funktionellen Untersuchungen zur biologischen Rolle des ALOX15-Weges. Damit scheint Tupaia belangeri kein geeigneteres Tiermodel f{\"u}r die Untersuchung des ALOX15-Weges des Menschen zu sein. 2) Entsprechend der Evolutionshypothese k{\"o}nnen S{\"a}ugetier-ALOX15-Orthologe in Arachidons{\"a}ure-12-lipoxygenierende- und Arachidons{\"a}ure-15-lipoxygenierende Enzyme eingeteilt werden. Dabei exprimieren S{\"a}ugetierspezies, die einen h{\"o}heren Evolutionsgrad als Gibbons aufweisen, Arachidons{\"a}ure-15-lipoxygenierende ALOX15-Orthologe, w{\"a}hrend evolution{\"a}r weniger weit entwickelte S{\"a}ugetiere Arachidons{\"a}ure-12 lipoxygenierende Enzyme besitzen. In dieser Arbeit wurden elf neue ALOX15-Orthologe als rekombinante Proteine exprimiert und funktionell charakterisiert. Die erhaltenen Ergebnisse f{\"u}gen sich widerspruchsfrei in die Evolutionshypothese ein und verbreitern deren experimentelle Basis. Die experimentellen Daten best{\"a}tigen auch das Triadenkonzept. 3) Da humane und murine ALOX15B-Orthologe unterschiedliche funktionelle Eigenschaften aufweisen, k{\"o}nnen Ergebnisse aus murinen Krankheitsmodellen zur biologischen Rolle der ALOX15B nicht direkt auf den Menschen {\"u}bertragen werden. Um die ALOX15B-Orthologen von Maus und Mensch funktionell einander anzugleichen, wurden im Rahmen der vorliegenden Arbeit Knock-in M{\"a}use durch die In vivo Mutagenese mittels CRISPR/Cas9-Technik hergestellt. Diese exprimieren eine humanisierte Mutante (Doppelmutation von Tyrosin603Asparagins{\"a}ure+Histidin604Valin) der murinen Alox15b. Diese M{\"a}use waren lebens- und fortpflanzungsf{\"a}hig, zeigten aber geschlechtsspezifische Unterschiede zu ausgekreuzten Wildtyp-Kontrolltieren im Rahmen ihre Individualentwicklung. 4) In vorhergehenden Untersuchungen zur Rolle der ALOX15B in Rahmen der Entz{\"u}ndungsreaktion wurde eine antiinflammatorische Wirkung des Enzyms postuliert. In der vorliegenden Arbeit wurde untersucht, ob eine Humanisierung der murinen Alox15b die Entz{\"u}ndungsreaktion in zwei verschiedenen murinen Entz{\"u}ndungsmodellen beeinflusst. Eine Humanisierung der murinen Alox15b f{\"u}hrte zu einer verst{\"a}rkten Ausbildung von Entz{\"u}ndungssymptomen im induzierten Dextran-Natrium-Sulfat-Kolitismodell. Im Gegensatz dazu bewirkte die Humanisierung der Alox15b eine Abschw{\"a}chung der Entz{\"u}ndungssymptome im Freund'schen Adjuvans Pfoten{\"o}demmodell. Diese Daten deuten darauf hin, dass sich die Rolle der ALOX15B in verschiedenen Entz{\"u}ndungsmodellen unterscheidet.}, language = {de} } @incollection{Apelojg2024, author = {Apelojg, Benjamin}, title = {I need to move it, move It!}, series = {Emotion in organizations}, booktitle = {Emotion in organizations}, editor = {Ashkanasy, Neal M. and Troth, Ashlea C. and Humphrey, Ronald H.}, publisher = {Emerald Publishing Limited}, address = {Bingley}, isbn = {978-1-83797-251-7}, doi = {10.1108/S1746-979120240000019002}, pages = {13 -- 35}, year = {2024}, abstract = {Purpose Student interest and learning success is an important component of teaching learning research. However, while the impact of emotions and psychological needs on students' achievements has been a focus of research, the impact of their physiological needs has been under studied. In this explorative study, I examine what impact the physiological and psychological needs of student teachers have on their feelings, motivation, and interest in different learning settings. Approach The research method used was the daily reconstruction method and included the Felix-App, a new digital research and feedback tool that allows the measurement of feelings, needs, motivation, and interest in real time. Findings The results suggest the importance of physiological needs for perceived emotions, motivation, and interest in the learning subject. The psychological needs, on the other hand, are of less importance. Originality The Felix-App is an innovative tool to learn more about learners' emotions and needs in real learning settings. The importance of physiological needs has been known since Maslow, but should be considered much more in the context of teaching and learning research in the future. There is a need for further research on the importance of physical aspects in learning.}, language = {en} } @article{HomolkaPryba2024, author = {Homolka, Walter and Pryba, Andrzej}, title = {Preparations for Marriage in the Jewish and Catholic Traditions}, series = {Religions}, volume = {15}, journal = {Religions}, number = {62}, publisher = {MDPI}, address = {Basel}, issn = {2077-1444}, doi = {https://doi.org/10.3390/rel15010062}, pages = {1 -- 14}, year = {2024}, abstract = {In many churches nowadays, there has been a standardized approach to premarital counseling for couples involving social, pastoral, and psychological perspectives. In contrast, many rabbis and other Jewish officials still concentrate on legal aspects alone. The need for resolving important issues on the verge of wedlock is too often left to secular experts in law, psychology, or counseling. However, in recent years, this lack of formal training for marriage preparation has also been acknowledged by the Jewish clergy in order to incorporate it in the preparatory period before the bond is tied. This case study focuses on Jewish and Roman Catholic conceptions of marriage, past and present. We intend to do a comparative analysis of the prerequisites of religious marriage based on the assumption that both Judaism and the Roman Catholic Church have a distinct legal framework to assess marriage preparation.}, language = {en} } @incollection{Chiarini2024, author = {Chiarini, Sara}, title = {Tituli e puteo ad Dipylum sito}, series = {Inscriptiones Graecae consilio et auctoritate Academiae Scientiarum Berolinensis et Brandenburgensis editae. Voluminis II et III editio tertia. Pars VIII miscellanea. Fasciculus I Defixiones Atticae}, booktitle = {Inscriptiones Graecae consilio et auctoritate Academiae Scientiarum Berolinensis et Brandenburgensis editae. Voluminis II et III editio tertia. Pars VIII miscellanea. Fasciculus I Defixiones Atticae}, publisher = {De Gruyter}, address = {Berlin / Boston}, isbn = {978-3-11133-578-0}, pages = {315 -- 329}, year = {2024}, language = {mul} } @phdthesis{Mueller2024, author = {M{\"u}ller, Daniel}, title = {Identification and monitoring of structures, controls, and evolution dynamics of hydrothermal systems and associated alteration through high-resolution remote sensing and in situ analysis}, doi = {10.25932/publishup-62668}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-626683}, school = {Universit{\"a}t Potsdam}, pages = {205}, year = {2024}, abstract = {Volcanic hydrothermal systems are an integral part of most volcanoes and typically involve a heat source, adequate fluid supply, and fracture or pore systems through which the fluids can circulate within the volcanic edifice. Associated with this are subtle but powerful processes that can significantly influence the evolution of volcanic activity or the stability of the near-surface volcanic system through mechanical weakening, permeability reduction, and sealing of the affected volcanic rock. These processes are well constrained for rock samples by laboratory analyses but are still difficult to extrapolate and evaluate at the scale of an entire volcano. Advances in unmanned aircraft systems (UAS), sensor technology, and photogrammetric processing routines now allow us to image volcanic surfaces at the centimeter scale and thus study volcanic hydrothermal systems in great detail. This thesis aims to explore the potential of UAS approaches for studying the structures, processes, and dynamics of volcanic hydrothermal systems but also to develop methodological approaches to uncover secondary information hidden in the data, capable of indicating spatiotemporal dynamics or potentially critical developments associated with hydrothermal alteration. To accomplish this, the thesis describes the investigation of two near-surface volcanic hydrothermal systems, the El Tatio geyser field in Chile and the fumarole field of La Fossa di Vulcano (Italy), both of which are among the best-studied sites of their kind. Through image analysis, statistical, and spatial analyses we have been able to provide the most detailed structural images of both study sites to date, with new insights into the driving forces of such systems but also revealing new potential controls, which are summarized in conceptual site-specific models. Furthermore, the thesis explores methodological remote sensing approaches to detect, classify and constrain hydrothermal alteration and surface degassing from UAS-derived data, evaluated them by mineralogical and chemical ground-truthing, and compares the alteration pattern with the present-day degassing activity. A significant contribution of the often neglected diffuse degassing activity to the total amount of degassing is revealed and constrains secondary processes and dynamics associated with hydrothermal alteration that lead to potentially critical developments like surface sealing. The results and methods used provide new approaches for alteration research, for the monitoring of degassing and alteration effects, and for thermal monitoring of fumarole fields, with the potential to be incorporated into volcano monitoring routines.}, language = {en} } @phdthesis{Melliger2024, author = {Melliger, Marc Andr{\´e}}, title = {Effects of exposing renewables to the market}, school = {Universit{\"a}t Potsdam}, pages = {xi, 139}, year = {2024}, abstract = {Electricity production contributes to a significant share of greenhouse gas emissions in Europe and is thus an important driver of climate change. To fulfil the Paris Agreement, the European Union (EU) needs a rapid transition to a fully decarbonised power production system. Presumably, such a system will be largely based on renewables. So far, many EU countries have supported a shift towards renewables such as solar and wind power using support schemes, but the economic and political context is changing. Renewables are now cheaper than ever before and have become cost-competitive with conventional technologies. Therefore, European policymakers are striving to better integrate renewables into a competitive market and to increase the cost-effectiveness of the expansion of renewables. The first step was to replace previous fixed-price schemes with competitive auctions. In a second step, these auctions have become more technology-open. Finally, some governments may phase out any support for renewables and fully expose them to the competitive power market. However, such policy changes may be at odds with the need to rapidly expand renewables and meet national targets due to market characteristics and investors' risk perception. Without support, price risks are higher, and it may be difficult to meet an investor's income expectations. Furthermore, policy changes across different countries could have unexpected effects if power markets are interconnected and investors able to shift their investments. Finally, in multi-technology auctions, technologies may dominate, which can be a risk for long-term power system reliability. Therefore, in my thesis, I explore the effects of phasing out support policies for renewables, of coordinating these phase-outs across countries, and of using multi-technology designs. I expand the public policy literature about investment behaviour and policy design as well as policy change and coordination, and I further develop an agent-based model. The main questions of my thesis are what the cost and deployment effects of gradually exposing renewables to market forces would be and how coordination between countries affects investors' decisions and market prices.. In my three contributions to the academic literature, I use different methods and come to the following results. In the first contribution, I use a conjoint analysis and market simulation to evaluate the effects of phasing out support or reintroducing feed-in tariffs from the perspective of investors. I find that a phase-out leads to investment shifts, either to other still-supported technologies or to other countries that continue to offer support. I conclude that the coordination of policy changes avoids such shifts.. In the second contribution, I integrate the empirically-derived preferences from the first contribution in to an agent-based power system model of two countries to simulate the effects of ending auctions for renewables. I find that this slows the energy transition, and that cross-border effects are relevant. Consequently, continued support is necessary to meet the national renewables targets. In the third contribution, I analyse the outcome of past multi-technology auctions using descriptive statistics, regression analysis as well as case study comparisons. I find that the outcomes are skewed towards single technologies. This cannot be explained by individual design elements of the auctions, but rather results from context-specific and country-specific characteristics. Based on this, I discuss potential implications for long-term power system reliability. The main conclusions of my thesis are that a complete phase-out of renewables support would slow down the energy transition and thus jeopardize climate targets, and that multi-technology auctions may pose a risk for some countries, especially those that cannot regulate an unbalanced power plant portfolio in the long term. If policymakers decide to continue supporting renewables, they may consider adopting technology-specific auctions to better steer their portfolio. In contrast, if policymakers still want to phase out support, they should coordinate these policy changes with other countries. Otherwise, overall transition costs can be higher, because investment decisions shift to still-supported but more expensive technologies.}, language = {en} } @phdthesis{Szekely2024, author = {Sz{\´e}kely, Andr{\´a}s Csaba}, title = {Long-distance circadian coordination via a phloem-delivered mobile transcript}, school = {Universit{\"a}t Potsdam}, pages = {105}, year = {2024}, language = {en} } @phdthesis{Marx2024, author = {Marx, Carolin Valerie}, title = {Escalation of commitment in information systems projects: a cognitive-affective perspective}, doi = {10.25932/publishup-62696}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-626969}, school = {Universit{\"a}t Potsdam}, pages = {174}, year = {2024}, abstract = {While information systems (IS) projects are pivotal in guiding organizational strategies and sustaining competitive advantages, they frequently overrun budgets, extend beyond timelines, and experience high failure rates. This dissertation delves into the psychological micro-foundations of human behavior - specifically cognition and emotion - in relation to a prevalent issue in IS project management: the tendency to persist with failing courses of action, also called escalation of commitment (EoC). Through a mixed-methods research approach, this study investigates the emotional and cognitive bases of decision-making during IS project escalation and its evolution over time. The results of a psychophysiological laboratory experiment provide evidence for the predictions on the role of negative and complex situational integral emotions of Cognitive Dissonance over Coping Theory and add to a better understanding of how escalation tendencies change during sequential decision-making due to cognitive learning effects. Using psychophysiological measures, including data triangulation between electrodermal and cardiovascular activity and AI-based analysis of facial micro-expressions, this research reveals physiological markers of behavioral escalation tendencies. Complementing the experiment, a qualitative analysis using free-form narration during decision-making simulations shows that decision-makers employ varied cognitive reasoning patterns to justify escalating behaviors, suggesting a sequence of four distinct cognitive phases. By integrating both qualitative and quantitative findings, this dissertation offers a comprehensive theoretical framework of how cognition and emotion shape behavioral EoC over time. I propose that escalation is a cyclical adaptation of mental models, distinguished by shifts in cognitive reasoning patterns, temporal cognition mode variations, and interactions with situational emotions and their anticipation. The primary contribution of this dissertation lies in disentangling the emotional and cognitive mechanisms that drive IS project escalation. The findings provide the basis for developing de-escalation strategies, thereby helping to improve decision-making under uncertainty. Stakeholders involved in IS projects that get "off track" should be aware of the tendency to persist with failing courses of action and the importance of the underlying emotional and cognitive dynamics.}, language = {de} } @phdthesis{Hammel2024, author = {Hammel, Alexander}, title = {Establishing the red microalga Porphyridium purpureum as a novel platform for the production of recombinant proteins}, doi = {10.25932/publishup-63270}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-632709}, school = {Universit{\"a}t Potsdam}, pages = {ix, 159}, year = {2024}, abstract = {Microalgae have been recognized as a promising green production platform for recombinant proteins. The majority of studies on recombinant protein expression have been conducted in the green microalga C. reinhardtii. While promising improvement regarding nuclear transgene expression in this alga has been made, it is still inefficient due to epigenetic silencing, often resulting in low yields that are not competitive with other expressor organisms. Other microalgal species might be better suited for high-level protein expression, but are limited in their availability of molecular tools. The red microalga Porphyridium purpureum recently emerged as candidate for the production of recombinant proteins. It is promising in that transformation vectors are episomally maintained as autonomously replicating plasmids in the nucleus at a high copy number, thus leading to high expression values in this red alga. In this work, we expand the genetic tools for P. purpureum and investigate parameters that govern efficient transgene expression. We provide an improved transformation protocol to streamline the generation of transgenic lines in this organism. After being able to efficiently generate transgenic lines, we showed that codon usage is a main determinant of high-level transgene expression, not only at the protein level but also at the level of mRNA accumulation. The optimized expression constructs resulted in YFP accumulation up to an unprecedented 5\% of the total soluble protein. Furthermore, we designed new constructs conferring efficient transgene expression into the culture medium, simplifying purification and harvests of recombinant proteins. To further improve transgene expression, we tested endogenous promoters driving the most highly transcribed genes in P. purpureum and found minor increase of YFP accumulation. We employed the previous findings to express complex viral antigens from the hepatitis B virus and the hepatitis C virus in P. purpureum to demonstrate its feasibility as producer of biopharmaceuticals. The viral glycoproteins were successfully produced to high levels and could reach their native confirmation, indicating a functional glycosylation machinery and an appropriate folding environment in this red alga. We could successfully upscale the biomass production of transgenic lines and with that provide enough material for immunization trials in mice that were performed in collaboration. These trials showed no toxicity of neither the biomass nor the purified antigens, and, additionally, the algal-produced antigens were able to elicit a strong and specific immune response. The results presented in this work pave the way for P. purpureum as a new promising producer organism for biopharmaceuticals in the microalgal field.}, language = {en} } @techreport{Nastasa2024, type = {Working Paper}, author = {Nastasa, Ruxandra}, title = {Germany and the EU's pursuit of gender equality in peace and security}, series = {Staat, Recht und Politik - Forschungs- und Diskussionspapiere}, journal = {Staat, Recht und Politik - Forschungs- und Diskussionspapiere}, number = {16}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2509-6974}, doi = {10.25932/publishup-62850}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-628501}, pages = {15}, year = {2024}, abstract = {The Women, Peace and Security Agenda (WPSA) is an international framework addressing the disproportionate impact of armed conflict on women and girls and promoting their meaningful participation in peacebuilding efforts. The Security Council called on Member States to develop National Action Plans (NAPs) to operationalize the four pillars of the Agenda. This study looks at the relevant steps undertaken by both Germany and the European Union. The author calls for improvements on either level and makes four recommendations.}, language = {en} }