@misc{Ehlers2022, type = {Master Thesis}, author = {Ehlers, Daniel}, title = {Hjalmar Schachts 'Neuer Plan' in der nationalsozialistischen Außenwirtschaftspolitik}, doi = {10.25932/publishup-61148}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-611488}, school = {Universit{\"a}t Potsdam}, pages = {84}, year = {2022}, abstract = {Die vorliegende Masterarbeit untersucht die Rolle des „Neuen Plan" von Reichswirtschaftsminister Hjalmar Schacht in der nationalsozialistischen Außenwirtschaftspolitik in f{\"u}nf konsekutiven Teilschritten. Erstens wird ein kurzer {\"U}berblick {\"u}ber den derzeitigen Forschungsstand zum „Neuen Plan" geliefert und auf die Quellenlage zur Bearbeitung der Fragestellung eingegangen. Um zweitens eine Aussage {\"u}ber das Verh{\"a}ltnis zwischen dem „Neuen Plan" und den außenwirtschaftspolitischen Leitlinien des Nationalsozialismus treffen zu k{\"o}nnen, werden diese f{\"u}r die NSDAP als Partei sowie f{\"u}r Hitler als unangefochtene politische F{\"u}hrungsfigur auf Basis geeigneter Prim{\"a}rquellen herausgearbeitet. Drittens wird anhand relevanter Wirtschaftsentwicklungen auf die Ausgangslage der außenwirtschaftspolitischen Krisensituation ab Mitte 1934 eingegangen, die durch den „Neuen Plan" im Sinne des NS-Regimes gel{\"o}st werden sollte. Viertens wird im Hauptteil der Forschungsarbeit der „Neue Plan" in mehreren Teilschritten erkl{\"a}rt. Zun{\"a}chst wird hierf{\"u}r auf die politischen Entwicklungen eingegangen, an welche der „Neue Plan" ankn{\"u}pfen konnte sowie auf die verschiedenen Bestandteile seiner Funktionsweise, die auf dieser Grundlage reformiert, erweitert oder neu geschaffen wurden. Inwieweit diese Maßnahmen mit den außenwirtschaftspolitischen Leitlinien der NS-Ideologie kompatibel waren, wird im Nachgang analysiert und kritisch eingeordnet. Die Effektivit{\"a}t des „Neuen Plans" wird zudem in Bezug auf f{\"u}nf Themenfelder anhand wirtschaftlicher Kennzahlen des Statistischen Jahrbuchs des Deutschen Reiches quellenbasiert beurteilt. Diese Analyse umfasst den Zeitraum vom Beginn des „Neuen Plans" im Jahr 1934 bis zur Entmachtung Schachts als Reichswirtschaftsminister zum Jahresende 1937.}, language = {de} } @article{EhlenzBergnerSchroeder2016, author = {Ehlenz, Matthias and Bergner, Nadine and Schroeder, Ulrik}, title = {Synergieeffekte zwischen Fach- und Lehramtsstudierenden in Softwarepraktika}, series = {Commentarii informaticae didacticae (CID)}, journal = {Commentarii informaticae didacticae (CID)}, number = {10}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-376-3}, issn = {1868-0844}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-94875}, pages = {99 -- 102}, year = {2016}, abstract = {Dieser Beitrag diskutiert die Konzeption eines Software-Projektpraktikums im Bereich E-Learning, welches Lehramts- und Fachstudierenden der Informatik erm{\"o}glicht, voneinander zu profitieren und praxisrelevante Ergebnisse generiert. Vorbereitungen, Organisation und Durchf{\"u}hrung werden vorgestellt und diskutiert. Den Abschluss bildet ein Ausblick auf die Fortf{\"u}hrung des Konzepts und den Ausbau des Forschungsgebietes.}, language = {de} } @misc{EhlenFloegeGoebeletal.2023, author = {Ehlen, Tobias and Fl{\"o}ge, Annie and G{\"o}bel, Franziska and Keller, Peter and Rœlly, Sylvie}, title = {{\"U}bungsbuch zur Stochastik}, editor = {Keller, Peter and Rœlly, Sylvie}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-563-7}, doi = {10.25932/publishup-59593}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-595939}, pages = {306}, year = {2023}, abstract = {Dieses Buch stellt {\"U}bungen zu den Grundbegriffen und Grunds{\"a}tzen der Stochastik und ihre L{\"o}sungen zur Verf{\"u}gung. So wie man Tonleitern in der Musik trainiert, so berechnet man {\"U}bungsaufgaben in der Mathematik. In diesem Sinne soll dieses {\"U}bungsbuch vor allem als Vorlage dienen f{\"u}r das eigenst{\"a}ndige, eigenverantwortliche Lernen und {\"U}ben. Die Sch{\"o}nheit und Einzigartigkeit der Wahrscheinlichkeitstheorie besteht darin, dass sie eine Vielzahl von realen Ph{\"a}nomenen modellieren kann. Daher findet man hier Aufgaben mit Verbindungen zur Geometrie, zu Gl{\"u}cksspielen, zur Versicherungsmathematik, zur Demographie und vielen anderen Themen.}, language = {de} } @book{Ehebrecht2014, author = {Ehebrecht, Daniel}, title = {The challenge of informal settlement upgrading : Breaking new ground in Hangberg, Cape Town?}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-300-8}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-71232}, publisher = {Universit{\"a}t Potsdam}, pages = {184}, year = {2014}, abstract = {Despite its many challenges and limitations the concept of in situ upgrading of informal settlements has become one of the most favoured approaches to the housing crisis in the 'Global South'. Due to its inherent principles of incremental in situ development, prevention of relocations, protection of local livelihoods and democratic participation and cooperation, this approach is often perceived to be more sustainable than other housing approaches that often rely on quantitative housing delivery and top down planning methodologies. While this study does not question the benefits of the in situ upgrading approach, it seeks to identify problems of its practical implementation within a specific national and local context. The study discusses the origin and importance of this approach on the basis of a review of international housing policy development and analyses the broader political and social context of the incorporation of this approach into South African housing policy. It further uses insights from a recent case study in Cape Town to determine complications and conflicts that can arise when applying in situ upgrading of informal settlements in a complex local context. On that basis benefits and limitations of the in situ upgrading approach are specified and prerequisites for its successful implementation formulated.}, language = {en} } @misc{Egorova2022, type = {Master Thesis}, author = {Egorova, Alisa}, title = {Hunting Down Animal Verbs}, doi = {10.25932/publishup-55770}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-557705}, school = {Universit{\"a}t Potsdam}, pages = {79}, year = {2022}, abstract = {Language change is an essential feature of human language, and it is therefore one of the focal areas of the scientific study of language. Language change is always tacitly at work in all languages of the world and at all levels of a given language, be it phonology, morphology, syntax, semantics, etc. It has been suggested that it is precisely the capacity to constantly change and adjust that allows language to keep serving the communicative goals of its users, from ancient to modern times (Fauconnier \& Turner, 2003, p. 179). This thesis investigates an especially salient pattern of lexicogrammatical change, namely word-formation of verbs from animal nouns by zero-derivation, in the process of which such nouns as, for example, dog, horse, or beaver change their usage and meaning to produce animal verbs: to dog 'to follow someone persistently and with a malicious intent', to horse about/around 'to make fun of, to 'rag', to ridicule someone' and to beaver away 'to work at working with great enthusiasm' respectively. In the previous literature this pattern of language change has been termed verbal zoosemy (e.g. Kiełtyka, 2016), i.e. metaphorical construal of human actions by means of linguistic material from the domain of animals. The approach taken in this study is not to simply report on the objective changes in the morphology, syntactic distribution and meaning of such linguistic units before and after conversion, but to uncover the complexity of cognitive mechanisms which allow the speakers of English to reclassify such well-established nominal units as animal noun into verbs. It is assumed that the grammatical change in these lexical units is predicated on and triggered by preceding semantic change. Thus, the study is set in the framework of Cognitive Historical Semantics and employs the Conceptual Metaphor and Metonymy Theory (CMMT) to untangle the intricacies of the semantic change making the grammatical change of animal nouns into verbs possible and acceptable in the minds of English speakers. To this end, this study employed the Oxford English Dictionary Online (OED Online) to compile a glossary of 96 denominal animal verbal forms tied to 209 verbal senses (most verbs in the dataset displayed polysemy). The data collected from the OED Online included not only the senses of the verbs, but also the date of the earliest recorded use of the verbal form with the given sense (regarded in the study as the date of conversion), the earliest usage examples for individual senses and morphologically or semantically related linguistic units from the lexical field of the respective parent noun which were amenable to explaining the observed instances of semantic change. Each instance of zoosemisation, i.e. of the creation of a separate metaphorical verbal sense, was then carefully analysed on the basis of the data collected and classified with the help of the CMMT. In the final stage, a comprehensive and systematic classification of the senses of animal verbs in accordance with the cognitive mechanisms of their creation (metaphor, metonymy, or a combination thereof) was produced together with a timeline of the first appearance of individual metaphorical senses of animal verbs recorded in the OED. The results show that animal verbs are produced through the interaction of conceptual metaphor and metonymy. Specifically, it was established that two major patterns of metaphor-metonymy interaction underpinning the process of verbal zoosemisation are metaphor from metonymy and metonymy from metaphor. In the former pattern, either an already existing metonymic animal verb is expanded to include the target domain PEOPLE, or the animal noun itself acts as a metonymic vehicle to a certain element of the idealised cognitive model of the given animal, which is metaphorically projected onto people. In the latter mechanism, a metaphorical projection of an animal term initially enters the lexicon in the form of a metaphorical animal noun referring to a human entity, and later in the course of language development it comes to metonymically stand for the action, which the given entity either performs or is involved in. Secondarily, it was observed that individual animal nouns can undergo multiple rounds of zoosemic conversion over time depending on the semantic frame in which the given linguistic unit undergoes denominal conversion, and that results in the polysemy of most animal verbs.}, language = {en} } @unpublished{EgorovKondratievSchulze2001, author = {Egorov, Yu. and Kondratiev, V. and Schulze, Bert-Wolfgang}, title = {On completeness of eigenfunctions of an elliptic operator on a manifold with conical points}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-25937}, year = {2001}, abstract = {Contents: 1 Introduction 2 Definitions 3 Rays of minimal growth 4 Completeness of root functions}, language = {en} } @unpublished{EgorovKondratievSchulze2004, author = {Egorov, Jurij V. and Kondratiev, V. A. and Schulze, Bert-Wolfgang}, title = {On the completeness of root functions of elliptic boundary problems in a domain with conical points on the boundary}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-26773}, year = {2004}, abstract = {Contents: 1 Introduction 2 Definitions 3 Rays of minimal growth 4 Proof of Theorem 2. 5 The growth of the resolvent 6 Proof of Theorem 3. 7 The completeness of root functions 8 Some generalizations}, language = {en} } @article{EgloffsteinHuenemohrIfenthaler2023, author = {Egloffstein, Marc and H{\"u}nemohr, Holger and Ifenthaler, Dirk}, title = {Modularization of open online courses on the eGov-Campus}, 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-62388}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-623888}, pages = {105 -- 112}, year = {2023}, abstract = {Modularization describes the transformation of MOOCs from a comprehensive academic course format into smaller, more manageable learning offerings. It can be seen as one of the prerequisites for the successful implementation of MOOC-based micro-credentials in professional education and training. This short paper reports on the development and application of a modularization framework for Open Online Courses. Using the example of eGov-Campus, a German MOOC provider for the public sector linked to both academia and formal professional development, the structural specifications for modularized MOOC offerings and a methodology for course transformation as well as associated challenges in technology, organization and educational design are outlined. Following on from this, future prospects are discussed under the headings of individualization, certification and integration.}, language = {en} } @phdthesis{Egli2021, author = {Egli, Lukas}, title = {Stabilizing agricultural systems through diversity}, doi = {10.25932/publishup-49684}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-496848}, school = {Universit{\"a}t Potsdam}, pages = {VII, 125}, year = {2021}, abstract = {In the light of climate change, rising demands for agricultural products and the intensification and specialization of agricultural systems, ensuring an adequate and reliable supply of food is fundamental for food security. Maintaining diversity and redundancy has been postulated as one generic principle to increase the resilience of agricultural production and other ecosystem services. For example, if one crop fails due to climate instability and extreme events, others can compensate the losses. Crop diversity might be particularly important if different crops show asynchronous production trends. Furthermore, spatial heterogeneity has been suggested to increase stability at larger scales as production losses in some areas can be buffered by surpluses in undisturbed ones. Besides systematically investigating the mechanisms underlying stability, identifying transformative pathways that foster them is important. In my thesis, I aim at answering the following questions: (i) How does yield stability differ between nations, regions and farms, and what is the effect of crop diversity on yield stability in relation to agricultural inputs, climate heterogeneity, climate instability and time at the national, regional or farm level? (ii) Is asynchrony between crops a better predictor of production stability than crop diversity? (iii) What is the effect of asynchrony between and within crops on stability and how is it related to crop diversity and space, respectively? (iv) What is the state of the art and what are knowledge gaps in exploring resilience and its multidimensionality in ecological and social-ecological systems with agent-based models and what are potential ways forward? In the first chapter, I provide the theoretical background for the subsequent analyses. I stress the need to better understand the resilience of social-ecological systems and particularly the stability of agricultural production. Moreover, I introduce diversity and spatial heterogeneity as two prominently discussed resilience mechanisms and describe approaches to assess resilience. In the second chapter, I combined agriculture and climate data at three levels of organization and spatial extents to investigate yield stability patterns and their relation to crop diversity, fertilizer, irrigation, climate heterogeneity and instability and time of nations globally, regions in Europe and farms in Germany using statistical analyses. Yield stability decreased from the national to the farm level. Several nations and regions substantially contributed to larger-scale stability. Crop diversity was positively associated with yield stability across all three levels of organization. This effect was typically more profound at smaller scales and in variable climates. In addition to crop diversity, climate heterogeneity was an important stabilizing mechanism especially at larger scales. These results confirm the stabilizing effect of crop diversity and spatial heterogeneity, yet their importance depends on the scale and agricultural management. Building on the findings of the second chapter, I deepened in the third chapter my research on the effect of crop diversity at the national level. In particular, I tested if asynchrony between crops, i.e. between the temporal production patterns of different crops, better predicts agricultural production stability than crop diversity. The stabilizing effect of asynchrony was multiple times higher than the effect of crop diversity, i.e. asynchrony is one important property that can explain why a higher diversity supports the stability of national food production. Therefore, strategies to stabilize agricultural production through crop diversification also need to account for the asynchrony of the crops considered. The previous chapters suggest that both asynchrony between crops and spatial heterogeneity are important stabilizing mechanisms. In the fourth chapter, I therefore aimed at better understanding the relative importance of asynchrony between and within crops, i.e. between the temporal production patterns of different crops and between the temporal production patterns of different cultivation areas of the same crop. Better understanding their relative importance is important to inform agricultural management decisions, but so far this has been hardly assessed. To address this, I used crop production data to study the effect of asynchrony between and within crops on the stability of agricultural production in regions in Germany and nations in Europe. Both asynchrony between and within crops consistently stabilized agricultural production. Adding crops increased asynchrony between crops, yet this effect levelled off after eight crops in regions in Germany and after four crops in nations in Europe. Combining already ten farms within a region led to high asynchrony within crops, indicating distinct production patters, while this effect was weaker when combining multiple regions within a nation. The results suggest, that both mechanisms need to be considered in agricultural management strategies that strive for more resilient farming systems. The analyses in the foregoing chapters focused at different levels of organization, scales and factors potentially influencing agricultural stability. However, these statistical analyses are restricted by data availability and investigate correlative relationships, thus they cannot provide a mechanistic understanding of the actual processes underlying resilience. In this regard, agent-based models (ABM) are a promising tool. Besides their ability to measure different properties and to integrate multiple situations through extensive manipulation in a fully controlled system, they can capture the emergence of system resilience from individual interactions and feedbacks across different levels of organization. In the fifth chapter, I therefore reviewed the state of the art and potential knowledge gaps in exploring resilience and its multidimensionality in ecological and social-ecological systems with ABMs. Next, I derived recommendations for a more effective use of ABMs in resilience research. The review suggests that the potential of ABMs is not utilized in most models as they typically focus on a single dimension of resilience and are mostly limited to one reference state, disturbance type and scale. Moreover, only few studies explicitly test the ability of different mechanisms to support resilience. To solve real-world problems related to the resilience of complex systems, ABMs need to assess multiple stability properties for different situations and under consideration of the mechanisms that are hypothesized to render a system resilient. In the sixth chapter, I discuss the major conclusions that can be drawn from the previous chapters. Moreover, I showcase the use of simulation models to identify management strategies to enhance asynchrony and thus stability, and the potential of ABMs to identify pathways to implement such strategies. The results of my thesis confirm the stabilizing effect of crop diversity, yet its importance depends on the scale, agricultural management and climate. Moreover, strategies to stabilize agricultural production through crop diversification also need to account for the asynchrony of the crops considered. As spatial heterogeneity and particularly asynchrony within crops strongly enhances stability, integrated management approaches are needed that simultaneously address multiple resilience mechanisms at different levels of organization, scales and time horizons. For example, the simulation suggests that only increasing the number of crops at both the pixel and landscape level avoids trade-offs between asynchrony between and within crops. If their potential is better exploited, agent-based models have the capacity to systematically assess resilience and to identify comprehensive pathways towards resilient farming systems.}, language = {en} } @misc{EgholmAndersenFaurschouKnudsenetal.2015, author = {Egholm, David L. and Andersen, Jane Lund and Faurschou Knudsen, Mads and Jansen, John D. and Nielsen, S. B.}, title = {The periglacial engine of mountain erosion}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {552}, issn = {1866-8372}, doi = {10.25932/publishup-40971}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-409718}, pages = {20}, year = {2015}, abstract = {There is growing recognition of strong periglacial control on bedrock erosion in mountain landscapes, including the shaping of low-relief surfaces at high elevations (summit flats). But, as yet, the hypothesis that frost action was crucial to the assumed Late Cenozoic rise in erosion rates remains compelling and untested. Here we present a landscape evolution model incorporating two key periglacial processes - regolith production via frost cracking and sediment transport via frost creep - which together are harnessed to variations in temperature and the evolving thickness of sediment cover. Our computational experiments time-integrate the contribution of frost action to shaping mountain topography over million-year timescales, with the primary and highly reproducible outcome being the development of flattish or gently convex summit flats. A simple scaling of temperature to marine delta O-18 records spanning the past 14 Myr indicates that the highest summit flats in mid-to high-latitude mountains may have formed via frost action prior to the Quaternary. We suggest that deep cooling in the Quaternary accelerated mechanical weathering globally by significantly expanding the area subject to frost. Further, the inclusion of subglacial erosion alongside periglacial processes in our computational experiments points to alpine glaciers increasing the long-term efficiency of frost-driven erosion by steepening hillslopes.}, language = {en} }