TY - JOUR A1 - Ryzhova, Anna A1 - Toepfl, Florian T1 - The Consequences of Evidence- Versus Non-Evidence-Based Understandings of the “Truth”: How Russian Speakers in Germany Negotiate Trust in Their Transnational News Environments JF - The International Journal of Press/Politics (ISSN: 1940-1620) N2 - Extant research on migrants’ media use and trust has delivered mixed evidence on whether, and in which ways, migrants stay loyal to their homeland news media and/or develop trust in host-society media, particularly when the narratives of the two types of media clash. To advance this strand of research, this study scrutinizes how an audience group with migration background, who lived the first part of their lives under authoritarian rule but then relocated to a democracy, negotiates trust in their multilingual, transnational news environments. Specifically, we conducted semi-structured interviews with forty-two Russian-speaking first-generation migrants living in Germany in 2021. As we find, distinct understandings of the concept of “truth” played a pivotal role in how our participants negotiated trust in their transnational news environments. We distinguish broadly two understandings of “truth”: (1) “truth” as a category grounded in factual evidence and (2) “truth” as a non-evidence based category grounded in values, emotions, or identities. Illustrative for the second understanding, some participants felt a strong moral obligation to believe Kremlin-sponsored media as they perceived these organizations as representing their homeland, independently of whether their news coverage was factually accurate or not. The two understandings of “truth” also affected how and where participants sought for what they considered the “truth.” In the “Discussion” section, we argue that particularly the non-evidence-based truth-understandings formulated by our participants, and the ensuing truth-seeking strategies are conducive to the reach and persuasive impact of Kremlin-sponsored content among Russian speakers living abroad. KW - - KW - Russian speakers KW - news trust KW - truth KW - transnational audiences KW - Germany Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-16795 SN - 1940-1612 SN - 1940-1620 VL - 30 IS - 1 SP - 326 EP - 345 PB - SAGE Publications CY - Los Angeles, CA ER - TY - JOUR A1 - Baumann, Jakob A1 - Pfretzschner, Matthias A1 - Rutter, Ignaz T1 - Parameterized complexity of vertex splitting to pathwidth at most 1 JF - Theoretical Computer Science N2 - Motivated by the planarization of 2-layered straight-line drawings, we consider the problem of modifying a graph such that the resulting graph has pathwidth at most 1. The problem Pathwidth-One Vertex Explosion (POVE) asks whether such a graph can be obtained using at most 𝑘 vertex explosions, where a vertex explosion replaces a vertex 𝑣 by deg(𝑣) degree-1 vertices, each incident to exactly one edge that was originally incident to 𝑣. For POVE, we give an FPT algorithm with running time 𝑂(4𝑘 ⋅ 𝑚) and an 𝑂(𝑘2) kernel, thereby improving over the 𝑂(𝑘6) kernel by Ahmed et al. [2] in a more general setting. Similarly, a vertex split replaces a vertex 𝑣 by two distinct vertices 𝑣1 and 𝑣2 and distributes the edges originally incident to 𝑣 arbitrarily to 𝑣1 and 𝑣2. Analogously to POVE, we define the problem variant Pathwidth-One Vertex Splitting (POVS) that uses the split operation instead of vertex explosions. Here we obtain a linear kernel and an algorithm with running time 𝑂((6𝑘 + 12)𝑘 ⋅ 𝑚). This answers an open question by Ahmed et al. [2]. Finally, we consider the problem Π-VertexSplitting (Π-VS), which generalizes the problem POVS and asks whether a given graph can be turned into a graph of a specific graph class Π using at most 𝑘 vertex splits. For graph classes Π that can be dfined in monadic second-order graph logic (MSO2), we show that the problem Π-VS can be expressed as an MSO2 formula, resulting in an FPT algorithm for Π-VS parameterized by 𝑘 if Π additionally has bounded treewidth. We obtain the same result for the problem variant using vertex explosions. [2] R. Ahmed, S.G. Kobourov, M. Kryven, An FPT algorithm for bipartite vertex splitting, in: P. Angelini, R. von Hanxleden (Eds.), Graph Drawing and Network Visualization -30th International Symposium, GD 2022, in: Lecture Notes in Computer Science, vol.13764, Springer, 2022, pp.261--268. KW - Vertex splitting KW - Pathwidth 1 KW - 2-layer drawing Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-19195 SN - 1879-2294 VL - 2024 IS - 1021 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Łatuszyński, Krzysztof A1 - Rudolf, Daniel T1 - Convergence of hybrid slice sampling via spectral gap JF - Advances in Applied Probability N2 - It is known that the simple slice sampler has robust convergence properties; however, the class of problems where it can be implemented is limited. In contrast, we consider hybrid slice samplers which are easily implementable and where another Markov chain approximately samples the uniform distribution on each slice. Under appropriate assumptions on the Markov chain on the slice, we give a lower bound and an upper bound of the spectral gap of the hybrid slice sampler in terms of the spectral gap of the simple slice sampler. An immediate consequence of this is that the spectral gap and geometric ergodicity of the hybrid slice sampler can be concluded from the spectral gap and geometric ergodicity of the simple version, which is very well understood. These results indicate that robustness properties of the simple slice sampler are inherited by (appropriately designed) easily implementable hybrid versions. We apply the developed theory and analyze a number of specific algorithms, such as the stepping-out shrinkage slice sampling, hit-and-run slice sampling on a class of multivariate targets, and an easily implementable combination of both procedures on multidimensional bimodal densities. KW - Slice sampler KW - spectral gap KW - geometric ergodicity Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-19264 SN - 1475-6064 VL - 56 (2024) IS - 4 SP - 1440 EP - 1466 PB - Cambridge University Press CY - Cambridge ER - TY - THES A1 - Pirwitz, Anne T1 - Migrationsfilme als ‚kritische Heimatfilme‘? BT - eine interdisziplinäre Untersuchung semantischer Räume und Chronotopoi der Migration im neuen rumänischen Film (1996–2022) N2 - Seit dem Zusammenbruch des Kommunismus ist die Anzahl im Ausland arbeitender Rumän*innen stark angestiegen. Inzwischen leben fast 20 % der Bevölkerung jenseits der Landesgrenzen. Transnationale Familien­strukturen mit in Rumänien zurückgelassenen Kindern oder Eltern und pluri-lokale Lebensweisen der Migrant*innen sind in kürzester Zeit zu einem alltäglichen Phänomen der rumänischen Gesellschaft geworden. Die Auswirkungen dieser Migration sind von gesamtgesellschaftlicher Relevanz und finden daher immer wieder Eingang in Literatur, Musik und Film. Diese Medien werden dabei von realen Ereignissen inspiriert, greifen aktuelle Diskurse auf und konstruieren eigene fiktionale Wirklichkeiten. Dabei vermitteln sie bestimmte Weltbilder und bieten verschiedene Sichtweisen auf die von ihnen verhandelten Themen an. Zwischen dem Ende der kommunistischen Diktatur 1989 und 2022 entstanden 52 rumänische fiktionale Kurz- und Spielfilme, die explizit Migration ins Zentrum ihrer erzählten Geschichten stellen. Der vorliegende Band untersucht, auf welche Weise die rumänische Arbeitsmigration im postkommunistischen Film verarbeitet wird, welches Bild der rumänischen Heimat und des ‚Westens‘ vermittelt wird, wie diese Räume durch filmische Mittel ästhetisch konstruiert werden und ob es sich bei diesen Werken um eine neue Form des ‚kritischen Heimatfilms‘ handelt. KW - Rumänien KW - Film KW - Migration Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:101:1-2409191636377.506847991255 PB - Akademische Verlagsgemeinschaft München CY - München ER - TY - BOOK ED - Atuguba, Raymond ED - Hennemann, Moritz ED - Boshe, Patricia ED - Dei-Tutu, Sena Afua T1 - African data protection laws BT - regulation, policy, and practice T3 - Global and comparative data law (edited by Moritz Hennemann; Lea Katharina Kumkar; Linda Kuschel; Björn Steinrötter) KW - Afrika KW - Datenschutz Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:101:1-2404231639273.359651152421 VL - 2024 IS - volume 3 PB - Walter de Gruyter CY - Berlin/Boston ER - TY - JOUR ED - Lampert, Claudia ED - Kühn, Jessica ED - Wiedel, Fabian ED - Fehr, Ada ED - Domdey, Paulina ED - Thiel, Kira T1 - Zeitgemässe Methoden der Kinder- und Jugendmedienforschung N2 - MedienPädagogik : Zeitschrift für Theorie und Praxis in der Medienbildung Themenheft 60: Zeitgemässe Methoden der Kinder- und Jugendmedienforschung Inhalte: Malin Fecke, Ada Fehr, Daniela Schlütz Die Mobile Experience Sampling Methode (MESM) in der Kinder- und Jugendmedienforschung André Weßel ‹Jeden Abend Instagram, TikTok, YouTube› - Das digitale Medientagebuch als qualitative Forschungsmethode zur Untersuchung des Medienhandelns junger Menschen Thorsten Naab, Ruth Wendt, Alexandra Langmeyer-Tornier Messung mütterlicher Medienerziehung für interaktive und nicht-interaktive Medien Thorsten Naab, Moritz Abraham Wie ein Spielzeug zum Helfer in Kinderbefragungen werden kann Sophie Mayen, Anne Reinhardt , Claudia Wilhelm Instrumente zur Messung von jugendlicher Mediennutzung Paulina Domdey, Katrin Potzel Medientagebücher als Teil sequenzieller Triangulation in der qualitativen Forschung Franziska Koschei, Lena Schmidt, Susanne Eggert, Andreas Dertinger, Michaela Kramer, Rudolf Kammerl Forschung mit Grundschüler:innen Jan Pfetsch, Felix Paschel, Cora Bieß, Ingrid Stapf Forschungsethik und Kinderrechte Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-15162 VL - 2024 IS - 60 PB - OAPublishing Collective Genossenschaft CY - Zürich ER - TY - JOUR A1 - Hofstadler, Julian T1 - Optimal convergence rates of MCMC integration for functions with unbounded second moment JF - Journal of Applied Probability N2 - We study the Markov chain Monte Carlo estimator for numerical integration for func- tions that do not need to be square integrable with respect to the invariant distribution. For chains with a spectral gap we show that the absolute mean error for L^p functions, with p ∈ (1, 2), decreases like n^(1/p)−1 , which is known to be the optimal rate. This improves currently known results where an additional parameter δ > 0 appears and the convergence is of order n^((1+δ)/p)−1 . KW - Markov chain KW - Monte Carlo KW - spectral gap KW - absolute mean error Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-19310 VL - 62 (2025) IS - 3 SP - 1069 EP - 1075 PB - Cambridge University Press CY - Cambridge ER - TY - JOUR A1 - Stocker, Armin A1 - Alshawish, Ali A1 - Bor, Martin A1 - Vidler, John A1 - Gouglidis, Antonios A1 - Scott, Andrew A1 - Marnerides, Angelos A1 - De Meer, Hermann A1 - Hutchison, David T1 - An ICT architecture for enabling ancillary services in Distributed Renewable Energy Sources based on the SGAM framework JF - Energy Informatics (2520-8942) N2 - Smart Grids are electrical grids that require a decentralised way of controlling electric power conditioning and thereby control the production and distribution of energy. Yet, the integration of Distributed Renewable Energy Sources (DRESs) in the Smart Grid introduces new challenges with regards to electrical grid balancing and storing of electrical energy, as well as additional monetary costs. Furthermore, the future smart grid also has to take over the provision of Ancillary Services (ASs). In this paper, a distributed ICT infrastructure to solve such challenges, specifically related to ASs in future Smart Grids, is described. The proposed infrastructure is developed on the basis of the Smart Grid Architecture Model (SGAM) framework, which is defined by the European Commission in Smart Grid Mandate M/490. A testbed that provides a flexible, secure, and low-cost version of this architecture, illustrating the separation of systems and responsibilities, and supporting both emulated DRESs and real hardware has been developed. The resulting system supports the integration of a variety of DRESs with a secure two-way communication channel between the monitoring and controlling components. It assists in the analysis of various inter-operabilities and in the verification of eventual system designs. To validate the system design, the mapping of the proposed architecture to the testbed is presented. Further work will help improve the architecture in two directions; first, by investigating specific-purpose use cases, instantiated using this more generic framework; and second, by investigating the effects a realistic number and variety of connected devices within different grid configurations has on the testbed infrastructure. KW - Ancillary services KW - SGAM KW - DRES KW - Smart Grid KW - Engineering KW - Information and Computing Sciences Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:101:1-2022071721175548518669 SN - 2520-8942 VL - 2022 IS - 5 PB - Springer International Publishing CY - Berlin ER - TY - JOUR A1 - Köstler, Verena A1 - Wolff, Monika-Sybille ED - Sabitzer, Barbara ED - Hörmann, Corinna T1 - Promoting digital competencies in pre-service teachers : the impact of integrative learning opportunities JF - Education Sciences N2 - Offering learning opportunities for developing digital competencies in pre-service teacher education remains challenging despite its growing importance in preparing future educators. This study investigates the effectiveness of integrative learning opportunities, called “digitally enhanced courses”, which combine subject-specific and digital learning objectives. Implemented at a German university (2019–2023). These courses aimed to promote digital competencies required for technology-supported teaching. Using survey data from 312 pre-service teachers, the research examined students’ self-assessed digital competencies, technology acceptance, and value–cost assessments through multiple measurement instruments, including TPACK scales, the Technology Acceptance Model, and Expectancy–Value beliefs. Results revealed significantly higher self-assessed digital competencies in private contexts compared to teaching situations. While mere course participation showed no significant impact, both the frequency and number of attended courses positively correlated with higher self-assessed digital skills across all TPACK dimensions. Additionally, increased technology acceptance and higher success expectations were associated with enhanced teaching-related digital competencies. The findings emphasize that the effectiveness of digitally enhanced courses is contingent upon systematic implementation and student engagement, highlighting the need for structured curricular integration of digital competency development in teacher education through comprehensive, spiral-curriculum approaches rather than isolated interventions. However, this study’s reliance on self-reported data may introduce social desirability and subjective estimation bias, and its cross-sectional design limits causal interpretations. Future research should employ longitudinal approaches to examine competency development over time, incorporate objective performance-based assessments, and explore how instructional design and curricular integration influence digital competency acquisition. KW - pre-service teacher education KW - digitally enhanced courses KW - TPACK KW - technology acceptance KW - expectancy value KW - curriculum integration Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-16854 SN - 2227-7102 VL - 15 (2025) IS - 3 PB - MDPI CY - Basel ER - TY - JOUR T1 - Universitätsbibliothek Passau: Jahresbericht 2024 N2 - Jahresbericht der Universitätsbibliothek Passau für das Jahr 2024. T3 - Jahresbericht der Universitätsbibliothek Passau - 2024 Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-19641 CY - Passau ER - TY - JOUR T1 - Universitätsbibliothek Passau: Jahresbericht 2023 N2 - Jahresbericht der Universitätsbibliothek Passau für das Jahr 2023. T3 - Jahresbericht der Universitätsbibliothek Passau - 2023 Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-15083 CY - Passau ER - TY - CHAP A1 - Ungruhe, Christian A1 - Agergaard, Sine T1 - Postcareer precarity : occupational challenges among former West African footballers in Northern Europe T2 - Sports in Africa : past and present (Ohio University Press Open Access Books. 42; https://ohioopen.library.ohio.edu/oupress/42/) N2 - When Benoît Assou-Ekotto’s former coach Harry Redknapp announced that the Cameroonian international had decided to end his professional football career and become an adult movie actor, the story generated astonishment and amusement in social media networks and received widespread attention from the mass media. Although the French-born footballer denied the story’s validity shortly afterward, claiming Redknapp was joking, it entertained football fans and the wider public during the spring of 2017. However, while this was one of the very few occasions on which an African footballer’s postcareer trajectory was a matter of public debate, it also revealed that former African professional footballers’ whereabouts, occupations, and living conditions are widely unknown and remain an underresearched topic. KW - Football migration Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:739-opus4-14897 SN - 978-0-8214-4696-6 N1 - "Sports in Africa : past and present" ist unter einer CC-BY-NC-ND-4.0-Lizenz erschienen und unter https://ohioopen.library.ohio.edu/oupress/42/ verfügbar. Die Veröffentlichung des Einzelbeitrags erfolgt mit freundlicher Erlaubnis des Verlags. SP - 190 EP - 203 PB - Ohio University Press CY - Athens ER -