@misc{HarendarskiBrieseHallmannetal.2024, author = {Harendarski, Ulf and Briese, Joschka and Hallmann, Tiziana and Dettmann, Luc and Kitzerow, Tom}, title = {Kraft und Signifikanz}, volume = {2024}, number = {13}, editor = {Harendarski, Ulf and Briese, Joschka}, doi = {10.15475/skms.2024.1}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-20388}, pages = {162 Seiten}, year = {2024}, abstract = {Zuerst erschienen auf: https://www.kultursemiotik.com/forschung/publikationen/schriftenreihe-online/ Inhalt Vorwort Kraft und Signifikanz. Kultursemiotische Betrachtungen allt{\"a}glicher Darstellungen in der sprachbasierten Semiose Ulf Harendarski und Joschka Briese Signifikanz der Melancholie Zur diskursiven Konstitution Leonard Cohens Tiziana Hallmann Von gefallenen Helden Mythologische Umschriften und ihre semiotisierende Kraft Luc Dettmann Sprachliche Konstitutionen von Drittpersonalit{\"a}t Eine semantisch/pragmatische Analyse von distanzmarkierenden Verben in drittpersonalen Aussagen {\"o}ffentlicher Texte Tom Kitzerow Spuren diskursiver Interpretationsprozesse F{\"u}r ein elaboriertes Konzept von Signifikanz Joschka Briese Impressum}, language = {de} } @article{ChenMuellerYokoyama2024, author = {Chen, Yijia and M{\"u}ller, Moritz and Yokoyama, Keita}, title = {A parameterized halting problem, Δ0 truth and the MRDP theorem}, series = {The Journal of Symbolic Logic (ISSN 1943-5886)}, volume = {90 (2025)}, journal = {The Journal of Symbolic Logic (ISSN 1943-5886)}, number = {2}, publisher = {Cambridge University Press}, address = {Cambridge}, issn = {1943-5886}, doi = {10.1017/jsl.2024.44}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19308}, pages = {483 -- 508}, year = {2024}, abstract = {We study the parameterized complexity of the problem to decide whether a given natural number n satisfies a given Δ0-formula ϕ(x); the parameter is the size of ϕ. This parameterization focusses attention on instances where n is large compared to the size of ϕ.We show unconditionally that this problem does not belong to the parameterized analogue of AC0. From this we derive that certain natural upper bounds on the complexity of our parameterized problem imply certain separations of classical complexity classes. This connection is obtained via an analysis of a parameterized halting problem. Some of these upper bounds follow assuming that IΔ0 proves the MRDP theorem in a certain weak sense.}, language = {en} } @phdthesis{Pirwitz2024, author = {Pirwitz, Anne}, title = {Migrationsfilme als ‚kritische Heimatfilme'?}, publisher = {Akademische Verlagsgemeinschaft M{\"u}nchen}, address = {M{\"u}nchen}, doi = {10.23780/9783960916338}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2409191636377.506847991255}, school = {Universit{\"a}t Passau}, pages = {330 Seiten}, year = {2024}, abstract = {Seit dem Zusammenbruch des Kommunismus ist die Anzahl im Ausland arbeitender Rum{\"a}n*innen stark angestiegen. Inzwischen leben fast 20 \% der Bev{\"o}lkerung jenseits der Landesgrenzen. Transnationale Familien­strukturen mit in Rum{\"a}nien zur{\"u}ckgelassenen Kindern oder Eltern und pluri-lokale Lebensweisen der Migrant*innen sind in k{\"u}rzester Zeit zu einem allt{\"a}glichen Ph{\"a}nomen der rum{\"a}nischen 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 rum{\"a}nische fiktionale Kurz- und Spielfilme, die explizit Migration ins Zentrum ihrer erz{\"a}hlten Geschichten stellen. Der vorliegende Band untersucht, auf welche Weise die rum{\"a}nische Arbeitsmigration im postkommunistischen Film verarbeitet wird, welches Bild der rum{\"a}nischen Heimat und des ‚Westens' vermittelt wird, wie diese R{\"a}ume durch filmische Mittel {\"a}sthetisch konstruiert werden und ob es sich bei diesen Werken um eine neue Form des ‚kritischen Heimatfilms' handelt.}, subject = {Rum{\"a}nien}, language = {de} } @misc{OPUS4-1516, title = {Zeitgem{\"a}sse Methoden der Kinder- und Jugendmedienforschung}, volume = {2024}, number = {60}, editor = {Lampert, Claudia and K{\"u}hn, Jessica and Wiedel, Fabian and Fehr, Ada and Domdey, Paulina and Thiel, Kira}, publisher = {OAPublishing Collective Genossenschaft}, address = {Z{\"u}rich}, doi = {10.21240/mpaed/60.X}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-15162}, pages = {179 Seiten}, year = {2024}, abstract = {MedienP{\"a}dagogik : Zeitschrift f{\"u}r Theorie und Praxis in der Medienbildung Themenheft 60: Zeitgem{\"a}sse Methoden der Kinder- und Jugendmedienforschung Inhalte: Malin Fecke, Ada Fehr, Daniela Schl{\"u}tz Die Mobile Experience Sampling Methode (MESM) in der Kinder- und Jugendmedienforschung Andr{\´e} 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 m{\"u}tterlicher Medienerziehung f{\"u}r 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 Medientageb{\"u}cher als Teil sequenzieller Triangulation in der qualitativen Forschung Franziska Koschei, Lena Schmidt, Susanne Eggert, Andreas Dertinger, Michaela Kramer, Rudolf Kammerl Forschung mit Grundsch{\"u}ler:innen Jan Pfetsch, Felix Paschel, Cora Bieß, Ingrid Stapf Forschungsethik und Kinderrechte}, language = {de} } @article{Huebenthal2024, author = {Huebenthal, Sandra}, title = {Ged{\"a}chtnis trifft Einleitung : ein neuer Blick auf alte Fragen}, series = {New Testament Studies}, volume = {70 (2024)}, journal = {New Testament Studies}, number = {2}, publisher = {Cambridge University Press}, address = {Cambridge}, doi = {10.1017/S002868852300036X}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19277}, pages = {131 -- 148}, year = {2024}, abstract = {Ausgehend von der kulturwissenschaftlichen Forschung zu Familienalben und deren Gemeinsamkeiten mit dem Neuen Testament l{\"a}dt dieser Beitrag dazu ein, dar{\"u}ber nachzudenken, was sich ver{\"a}ndert, wenn wir die Fragen der Einf{\"u}hrung in das Neue Testament durch die Brille der Theorie des sozialen Ged{\"a}chtnisses betrachten. Aufbauend auf Forschungsergebnissen der Oral History und kulturwissenschaftlichen Ged{\"a}chtnistheorie wird argumentiert, dass die allgemeine Einleitung in den Bereich des kulturellen Ged{\"a}chtnisses und die spezielle Einleitung in den Bereich des sozialen/kollektiven Ged{\"a}chtnisses f{\"a}llt. Beide sind durch den Floating Gap getrennt, was die vielfach wahrgenommenen Ver{\"a}nderungen in der ersten H{\"a}lfte des zweiten Jahrhunderts erkl{\"a}rt. Im n{\"a}chsten Schritt wird ein Modell, das auf dem Dreigenerationenged{\"a}chtnis, der Generational Gap (nach einer Generation), der Floating Gap (nach 3-4 Generationen) und den ersten Generationen von Jesus-Anh{\"a}ngern aufbaut, mit Vorschl{\"a}gen zur Datierung neutestamentlicher B{\"u}cher aus der Einleitungswissenschaft ins Gespr{\"a}ch gebracht. Es zeigt sich, dass die vor und nach dem Generational Gap verwendeten Genres je unterschiedliche Eigenschaften haben, die den Erwartungen an Medien des sozialen und kollektiven Ged{\"a}chtnisses entsprechen. Der Beitrag schließt mit allgemeinen Fragen zu Medien und Medienwandel im Neuen Testament, d.h. M{\"u}ndlichkeit und Schriftlichkeit, identische Texte und Textkritik, dem Kanon als prim{\"a}rem Kontext, der Ausweitung des Geltungsbereichs sowie fluiden Gattungen, und kommt zu dem Schluss, dass kulturwissenschaftliche Ged{\"a}chtnistheorie in der Tat neue Perspektiven f{\"u}r die Einleitungswissenschaft bietet.}, language = {de} } @article{ŁatuszyńskiRudolf2024, author = {Łatuszyński, Krzysztof and Rudolf, Daniel}, title = {Convergence of hybrid slice sampling via spectral gap}, series = {Advances in Applied Probability}, volume = {56 (2024)}, journal = {Advances in Applied Probability}, number = {4}, publisher = {Cambridge University Press}, address = {Cambridge}, issn = {1475-6064}, doi = {10.1017/apr.2024.16}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19264}, pages = {1440 -- 1466}, year = {2024}, abstract = {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.}, language = {en} } @article{BouriSokhanvarKinatederetal.2024, author = {Bouri, Elie and Sokhanvar, Amin and Kinateder, Harald and {\c{C}}ift{\c{c}}ioğlu, Serhan}, title = {Tech titans and crypto giants : mutual returns predictability and trading strategy implications}, series = {Journal of International Financial Markets, Institutions and Money}, volume = {2025}, journal = {Journal of International Financial Markets, Institutions and Money}, number = {99}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-0612}, doi = {10.1016/j.intfin.2024.102109}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19259}, pages = {30 Seiten}, year = {2024}, abstract = {This study examines the directional return predictability between the technology sector of U.S. stock market and three major cryptocurrencies (Bitcoin, Ethereum, and Dogecoin). Using daily data from August 7, 2015, to February 8, 2024, and the cross-quantilogram approach in both static and dynamic settings, the results reveal significant positive predictability in the stock market-cryptocurrency nexus. The technology sector, semiconductors subsector, and Nvidia Corporation exert predictive power over cryptocurrency returns and vice versa across several quantiles and lags. When controlling for the impact of other financial variables, namely, U.S. dollar and U.S. treasury markets, the return predictability holds, especially for the two largest cryptocurrencies, Bitcoin and Ethereum, which reflects their importance and tighter connections with the U.S. technology sector. A trading strategy based on the results of the cross-quantilograms outperforms a benchmark strategy (i.e., always long position in either stocks or cryptocurrency), which underlines the practical implications of our main findings, particularly in terms of the significant return interactions between U.S. technology/semiconductors stocks and large cryptocurrencies.}, language = {en} } @article{DrescherJanzen2024, author = {Drescher, Katharina and Janzen, Benedikt}, title = {When weather wounds workers : the impact of temperature on workplace accidents}, series = {Journal of Public Economics}, volume = {2025}, journal = {Journal of Public Economics}, number = {241}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.jpubeco.2024.105258}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19241}, pages = {17 Seiten}, year = {2024}, abstract = {We study the effects of temperature on occupational health using administrative data on Swiss occupational accidents from 1996 to 2019. Our results imply that on hot days (T𝑚𝑎𝑥 ≥ 30 ◦C) the number of occupational accidents increases by 7.4\% and on ice days (T𝑚𝑎𝑥 < 0 ◦C) by 6.3\%, relative to mild days. We find that extreme temperatures cause an average of 2600 workplace accidents each year, costing CHF 91 million annually. We provide suggestive evidence for insufficient sleep on hot days as a mechanism. While extreme temperatures worsen occupational health, we observe limited labor supply adaption for most workers.}, language = {en} } @article{LechldeMeerFuermann2024, author = {Lechl, Michael and de Meer, Hermann and F{\"u}rmann, Tim}, title = {A stochastic flexibility calculus for uncertainty-aware energy flexibility management}, series = {Applied Energy}, volume = {2025}, journal = {Applied Energy}, number = {379}, doi = {10.1016/j.apenergy.2024.124907}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19233}, pages = {16 Seiten}, year = {2024}, abstract = {The increasing share of volatile renewables in power systems requires more reserves to balance forecast errors in renewable generation and power fluctuations. In contrast, common reserves such as gas-fired power plants are phased out, impeding the procurement of sufficient reserves. Alternative reserves, particularly on the demand side, such as battery storage systems, also exhibit some degree of freedom to deviate from their scheduled operating point to supply or consume more or less power, thus providing a flexibility potential. However, demand-side flexibility potentials are generally subject to uncertainties, and so is the generation of volatile renewables. The challenge is incorporating the uncertainties on both sides to procure sufficient (uncertain) flexibility potential in advance. Considering uncertainty is important to avoid additional, drastic measures in real-time to balance generation and demand, such as curtailing renewable generation or load shedding. This work presents a stochastic flexibility calculus that provides an indicator for computing the risk of insufficient flexibility potentials or, conversely, guarantees for sufficient flexibility potentials. Thus, the stochastic flexibility calculus contributes to overcoming the challenge of procuring sufficient flexibility potentials in renewable-based systems. An evaluation based on real data is performed using an example of a renewable energy community consisting of households equipped with photovoltaic power plants and battery storage systems. The newly introduced stochastic flexibility calculus computes the number of households that must operate their battery storage systems flexibly to balance forecast errors locally. The results show that the forecast method significantly influences this number. Some numerical results appear unexpected, as too many flexibility-friendly households can negatively impact the aggregated household flexibility potential.}, language = {en} } @article{FinkForsterHeinleinHeinrich2024, author = {Fink, Thomas and Forster-Heinlein, Brigitte and Heinrich, Florian}, title = {Rebricking frames and bases}, series = {Journal of Mathematical Analysis and Applications}, volume = {2025}, journal = {Journal of Mathematical Analysis and Applications}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1096-0813}, doi = {10.1016/j.jmaa.2024.129051}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19227}, pages = {35 Seiten}, year = {2024}, abstract = {In 1949, Denis Gabor introduced the "complex signal" (nowadays called "analytic signal") by combining a real function fwith its Hilbert transform Hfto a complex function f+iHf. His aim was to extract phase information, an idea that has inspired techniques as the monogenic signal and the complex dual tree wavelet transform. In this manuscript, we consider two questions: When do two real-valued bases or frames {fn:n∈N} and {gn:n∈N} form a complex basis or frame of the form {fn+ign:n∈N}? And for which bounded linear operators Adoes {fn+iAfn:n∈N} form a complex-valued orthonormal basis, Riesz basis or frame, when {fn:n ∈N} is a real-valued orthonormal basis, Riesz basis or frame? We call this approach rebricking. It is well-known that the analytic signals don't span the complex vector space L2(R; C), hence H is not a rebricking operator. We give a full characterization of rebricking operators for bases, in particular orthonormal and Riesz bases, Parseval frames, and frames in general. We also examine the special case of finite dimensional vector spaces and show that we can use any real, invertible matrix for rebricking if we allow for permutations in the imaginary part.}, language = {en} } @article{KehleUrhahne2024, author = {Kehle, Laura and Urhahne, Detlef}, title = {Testing the CONIC model: The interplay of conscientiousness and interest in predicting academic effort}, series = {Learning and Instruction}, volume = {2025}, journal = {Learning and Instruction}, number = {95}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-3263}, doi = {10.1016/j.learninstruc.2024.102050}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19214}, pages = {13 Seiten}, year = {2024}, abstract = {Background This report comprises two studies that more closely examined the Conscientiousness × Interest Compensation (CONIC) model by Trautwein, Nagengast, Roberts, and L{\"u}dtke (2019) under laboratory conditions. The model specifies individual and compensatory effects of conscientiousness and individual interest on academic effort. Aims This research piece examines the assumed relationships between the three core variables of the CONIC model. Samples The first study was conducted with 152 university students and the second study included 120 university students randomly distributed across two experimental conditions and one control condition. Methods In an initial modeling study, we investigated the model assumptions in two different learning contexts and tested them using structural equation modeling (SEM). In a subsequent experimental study, we manipulated the predictor variables of academic effort to either promote conscientious or interest-based learning. The group differences were examined using multigroup SEM. Results In the modeling study, interest was always and conscientiousness at least partially a positive and significant predictor of academic effort. A compensatory effect of interest and conscientiousness could not be found. In the experimental study, promoting conscientious learning resulted in interest showing up as a stronger predictor of academic effort. However, promoting interest-based learning crystallized conscientiousness as the stronger predictor of academic effort. Moreover, the compensatory effect of the two personality traits was significantly stronger in the groups where conscientiousness or interest-based learning was promoted than in the control group. Conclusions Results provide support for the CONIC model and particularly highlight the compensatory effects of conscientiousness and interest at the model's heart.}, language = {en} } @article{GoerigkKurtz2024, author = {Goerigk, Marc and Kurtz, Jannis}, title = {Data-driven prediction of relevant scenarios for robust combinatorial optimization}, series = {Computers \& Operations Research}, volume = {2025}, journal = {Computers \& Operations Research}, number = {174}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-765X}, doi = {10.1016/j.cor.2024.106886}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19207}, pages = {14 Seiten}, year = {2024}, abstract = {We study iterative constraint and variable generation methods for (two-stage) robust combinatorial optimization problems with discrete uncertainty. The goal of this work is to find a set of starting scenarios that provides strong lower bounds early in the process. To this end we define the Relevant Scenario Recognition Problem (RSRP) which finds the optimal choice of scenarios which maximizes the corresponding objective value. We show for classical and two-stage robust optimization that this problem can be solved in polynomial time if the number of selected scenarios is constant and NP-hard if it is part of the input. Furthermore, we derive a linear mixed-integer programming formulation for the problem in both cases. Since solving the RSRP is not possible in reasonable time, we propose a machine-learning-based heuristic to determine a good set of starting scenarios. To this end, we design a set of dimension-independent features, and train a Random Forest Classifier on already solved small-dimensional instances of the problem. Our experiments show that our method is able to improve the solution process even for larger instances than contained in the training set, and that predicting even a small number of good starting scenarios can considerably reduce the optimality gap. Additionally, our method provides a feature importance score which can give new insights into the role of scenario properties in robust optimization.}, language = {en} } @article{BaumannPfretzschnerRutter2024, author = {Baumann, Jakob and Pfretzschner, Matthias and Rutter, Ignaz}, title = {Parameterized complexity of vertex splitting to pathwidth at most 1}, series = {Theoretical Computer Science}, volume = {2024}, journal = {Theoretical Computer Science}, number = {1021}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1879-2294}, doi = {10.1016/j.tcs.2024.114928}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19195}, pages = {15 Seiten}, year = {2024}, abstract = {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.}, language = {en} } @article{KreuzerMiasnikovWalsh2024, author = {Kreuzer, Martin and Miasnikov, Alexei and Walsh, Florian}, title = {Decomposing finite Z-algebras}, series = {Journal of Algebra}, volume = {2025}, journal = {Journal of Algebra}, number = {664 B}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1090-266X}, doi = {10.1016/j.jalgebra.2024.10.027}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19184}, pages = {206 -- 246}, year = {2024}, abstract = {For a finite Z-algebra R, i.e., for a ring which is not necessarily associative or unitary, but whose additive group is finitely generated, we construct a decomposition of R/Ann(R) into directly indecomposable factors under weak hypotheses. The method is based on constructing and decomposing a ring of scalarsS, and then lifting the decomposition ofSto the bilinear map given by the multiplication of R, and finally to R/Ann(R). All steps of the construction are given as explicit algorithms and it is shown that the entire procedure has a probabilistic polynomial time complexity in the bit size of the input, except for the possible need to calculate the prime factorization of an integer. In particular, in the case when Ann(R)=0, these algorithms compute direct decompositions of R into directly indecomposable factors.}, language = {en} } @article{StoffelsFaltermaierStrunketal.2024, author = {Stoffels, Dominik and Faltermaier, Stefan and Strunk, Kim Simon and Fiedler, Marina}, title = {Guiding computationally intensive theory development with explainable artificial intelligence: The case of shapley additive explanations}, series = {Journal of Information Technology (ISSN: 1466-4437)}, volume = {40}, journal = {Journal of Information Technology (ISSN: 1466-4437)}, number = {2}, publisher = {SAGE Publications}, address = {London, England}, issn = {0268-3962}, doi = {10.1177/02683962241289597}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-16762}, pages = {180 -- 213}, year = {2024}, abstract = {This study advances the field of Computationally Intensive Theory Development (CTD) by examining the capabilities of Explainable Artificial Intelligence (XAI), in particular SHapley Additive exPlanations (SHAP), for theory development, while providing guidelines for this process. We evaluate SHAP's methodological abilities and develop a structured approach for using SHAP to harness insights from black-box predictive models. For this purpose, we leverage a dual-methodological approach. First, to assess SHAP's capabilities in uncovering patterns that shape a phenomenon, we conduct a Monte-Carlo simulation study. Second, to illustrate and guide the theory development process with SHAP for CTD, we apply SHAP in a use-case using real-world data. Based on these analyses, we propose a stepwise uniform and replicable approach giving guidance that can benefit rigorous theory development and increase the traceability of the theorizing process. With our structured approach, we contribute to the use of XAI approaches in research and, by uncovering patterns in black-box prediction models, add to the ongoing search for next-generation theorizing methods in the field of Information Systems (IS).}, subject = {-}, language = {en} } @article{RyzhovaToepfl2024, author = {Ryzhova, Anna and Toepfl, Florian}, title = {The Consequences of Evidence- Versus Non-Evidence-Based Understandings of the "Truth": How Russian Speakers in Germany Negotiate Trust in Their Transnational News Environments}, series = {The International Journal of Press/Politics (ISSN: 1940-1620)}, volume = {30}, journal = {The International Journal of Press/Politics (ISSN: 1940-1620)}, number = {1}, publisher = {SAGE Publications}, address = {Los Angeles, CA}, issn = {1940-1612}, doi = {10.1177/19401612241257872}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-16795}, pages = {326 -- 345}, year = {2024}, abstract = {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.}, subject = {-}, language = {en} } @article{BeselerToepfl2024, author = {Beseler, Arista and Toepfl, Florian}, title = {Conduits of the Kremlin's Informational Influence Abroad? How German-Language Alternative Media Outlets Are Connected to Russia's Ruling Elites}, series = {The International Journal of Press/Politics (ISSN: 1940-1620)}, volume = {30}, journal = {The International Journal of Press/Politics (ISSN: 1940-1620)}, number = {3}, publisher = {SAGE Publications}, address = {Los Angeles, CA}, issn = {1940-1612}, doi = {10.1177/19401612241230284}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-16755}, pages = {659 -- 678}, year = {2024}, abstract = {Extant research on alternative media in Western democracies has focused on scrutinizing their content, organization, production, and audiences. However, the extent to which alternative outlets are linked to powerful foreign actors has not yet been analyzed, despite the fact that a plethora of outlets have openly sided with Russia after its full-scale invasion of Ukraine in February 2022, spreading the Kremlin's propagandistic narratives. To fill this gap, this study adopts a case study approach. It selects Germany as a revelatory case of a key target country of Russia's foreign influence efforts, raising the question of how and to what extent German-language alternative media outlets are connected to Russia's ruling elites. Grounded in qualitative analysis of a wide range of documents, this study proposes a categorization that divides the connections into three different types: organizational, media, and personal connections. Subsequently, it is demonstrated that half of the analyzed German-language alternative media outlets maintain at least one of these three types of connections to the Kremlin. These findings contribute to our knowledge of alternative media, as well as Russia's overt and covert foreign influence operations, the so-called "active measures." They also highlight the need for more transparency in alternative media landscapes in democratic contexts across the globe.}, subject = {-}, language = {en} } @article{GlockMunhaCorreiaSudakov2024, author = {Glock, Stefan and Munh{\´a} Correia, David and Sudakov, Benny}, title = {Hamilton cycles in pseudorandom graphs}, series = {Advances in Mathematics}, volume = {2024}, journal = {Advances in Mathematics}, number = {458 B}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.aim.2024.109984}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19151}, pages = {45 Seiten}, year = {2024}, abstract = {Finding general conditions which ensure that a graph is Hamiltonian is a central topic in graph theory. An old and well-known conjecture in the area states that any d-regular n-vertex graph G whose second largest eigenvalue in absolute value λ(G) is at most d/C, for some universal constant C > 0, has a Hamilton cycle. In this paper, we obtain two main results which make substantial progress towards this problem. Firstly, we settle this conjecture in full when the degree d is at least a small power of n. Secondly, in the general case we show that λ(G) ≤ d/C(log n)1/3 implies the existence of a Hamilton cycle, improving the 20-year old bound of d/ log1-o(1) n of Krivelevich and Sudakov. We use in a novel way a variety of methods, such as a robust P{\´o}sa rotation-extension technique, the Friedman-Pippenger tree embedding with rollbacks and the absorbing method, combined with additional tools and ideas. Our results have several interesting applications. In particular, they imply the currently best-known bounds on the number of generators which guarantee the Hamiltonicity of random Cayley graphs, which is an important partial case of the well known Hamiltonicity conjecture of Lov{\´a}sz. They can also be used to improve a result of Alon and Bourgain on additive patterns in multiplicative subgroups.}, language = {en} } @article{EpperleinWirth2024, author = {Epperlein, Jeremias and Wirth, Fabian}, title = {The joint spectral radius is pointwise H{\"o}lder continuous}, series = {Linear Algebra and its Applications}, volume = {2025}, journal = {Linear Algebra and its Applications}, number = {704}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-1856}, doi = {10.1016/j.laa.2024.09.016}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19140}, pages = {92 -- 122}, year = {2024}, abstract = {We show that the joint spectral radius is pointwise H{\"o}lder continuous. In addition, the joint spectral radius is locally H{\"o}lder continuous for ε-inflations. In the two-dimensional case, local H{\"o}lder continuity holds on the matrix sets with positive joint spectral radius.}, language = {en} } @article{KreuzerLinhLong2024, author = {Kreuzer, Martin and Linh, Tran N. K. and Long, Le N.}, title = {Differential theory of zero-dimensional schemes}, series = {Journal of Pure and Applied Algebra}, volume = {229 (2025)}, journal = {Journal of Pure and Applied Algebra}, number = {1}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-1376}, doi = {10.1016/j.jpaa.2024.107815}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19130}, pages = {31 Seiten}, year = {2024}, abstract = {To study a 0-dimensional scheme |X in |P^n over a perfect field K, we use the module of K{\"a}hler differentials (Omega)(^1)(_{R/K}) of its homogeneous coordinate ring R and its exterior powers, the higher modules of K{\"a}hler differentials (Omega)(^m)(_{R/K}). One of our main results is a characterization of weakly curvilinear schemes |X by the Hilbert polynomials of the modules (Omega)(^m)(_{R/K}) which allows us to check this property algorithmically without computing the primary decomposition of the vanishing ideal of |X. Further main achievements are precise formulas for the Hilbert functions and Hilbert polynomials of the modules (Omega)(^m)(_{R/K}) for a fat point scheme |X which extend and settle previous partial results and conjectures. Underlying these results is a novel method: we first embed the homogeneous coordinate ring R into its truncated integral closure ~R. Then we use the corresponding map from the module of K{\"a}hler differentials (Omega)(^1)(_{R/K}) to (Omega)(^1)(_{~R/K}) to find a formula for the Hilbert polynomial HP((Omega)(^1)(_{R/K})) and a sharp bound for the regularity index ri((Omega)(^1)(_{R/K})). Next we extend this to formulas for the Hilbert polynomials HP((Omega)(^m)(_{R/K})) and bounds for the regularity indices of the higher modules of K{\"a}hler differentials. As a further application, we characterize uniformity conditions on |X using the Hilbert functions of the K{\"a}hler differential modules of |X and its subschemes.}, language = {en} } @article{FekihHassenSchoppikSchieggetal.2024, author = {Fekih Hassen, Wiem and Schoppik, Luis and Schiegg, Sascha and Gerl, Armin}, title = {Power management approach of hybrid energy storage system for electric vehicle charging stations}, series = {Smart Cities}, volume = {7 (2024)}, journal = {Smart Cities}, number = {6}, publisher = {MDPI}, address = {Basel}, issn = {2624-6511}, doi = {10.3390/smartcities7060156}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:m347-opus-6045}, pages = {4025 -- 4051}, year = {2024}, abstract = {The applicability of Hybrid Energy Storage Systems (HESSs) has been shown in multiple application fields, such as Charging Stations (CSs), grid services, and microgrids. HESSs consist of an integration of two or more single Energy Storage Systems (ESSs) to combine the benefits of each ESS and improve the overall system performance. In this work, we propose a novel power management controller called the Hybrid Controller for the efficient HESS's charging and discharging, considering the State of Charge (SoC) of the HESS and the dynamic supply and load. The Hybrid Controller optimises the use of the HESS, i.e., minimises the amount of energy drawn from and discharged to the grid, thus utilising and prioritising the provided Photovoltaic (PV) power. The performance of our proposal was assessed via simulation using various evaluation metrics, i.e., Autarky, charge/discharge cycle, and Self-Consumption (SC), where we defined 24 scenarios in different locations in Germany.}, language = {en} } @inproceedings{BergerRodriguesReiseretal.2024, author = {Berger, Christian and Rodrigues, L{\´i}vio and Reiser, Hans P. and Cogo, Vin{\´i}cius and Bessani, Alysson}, title = {Chasing lightspeed consensus}, series = {Middleware '24: Proceedings of the 25th International Middleware Conference}, volume = {2024}, booktitle = {Middleware '24: Proceedings of the 25th International Middleware Conference}, publisher = {ACM}, address = {New York}, isbn = {979-8-4007-0623-3}, doi = {10.1145/3652892.3700756}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-19106}, pages = {158 -- 171}, year = {2024}, abstract = {Blockchain technology sparked renewed interest in planetary-scale Byzantine fault-tolerant (BFT) state machine replication (SMR). While recent works predominantly focused on improving the scalability and throughput of these protocols, few of them addressed latency. We present Mercury, a novel transformation to autonomously optimize the latency of quorum-based BFT consensus. Mercury employs a dual resilience threshold that enables faster transaction ordering when the system contains few faulty replicas. Mercury allows forming compact quorums that substantially accelerate consensus using a smaller resilience threshold. Nevertheless, Mercury upholds standard SMR safety and liveness guarantees with optimal resilience, thanks to its judicious use of a dual operation mode and BFT forensics techniques. Our experiments spread tens of replicas across continents and reveal that Mercury can order transactions with finality in less than 0.4s, half the time of a PBFT-like protocol (optimal in terms of number of communication steps and resilience) in the same network. Furthermore, Mercury matches the latency of running its base protocol on theoretically optimal internet links (transmitting at 67\% of the speed of light).}, language = {en} } @book{OPUS4-1908, title = {African data protection laws}, series = {Global and comparative data law (edited by Moritz Hennemann; Lea Katharina Kumkar; Linda Kuschel; Bj{\"o}rn Steinr{\"o}tter)}, volume = {2024}, journal = {Global and comparative data law (edited by Moritz Hennemann; Lea Katharina Kumkar; Linda Kuschel; Bj{\"o}rn Steinr{\"o}tter)}, number = {volume 3}, editor = {Atuguba, Raymond and Hennemann, Moritz and Boshe, Patricia and Dei-Tutu, Sena Afua}, publisher = {Walter de Gruyter}, address = {Berlin/Boston}, doi = {10.1515/9783110797909}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2404231639273.359651152421}, publisher = {Universit{\"a}t Passau}, pages = {X, 213 Seiten}, year = {2024}, subject = {Afrika}, language = {en} } @article{Bach2024, author = {Bach, Maurizio}, title = {Effektiveres Pandemiemanagement durch sozialwissenschaftliche Politikberatung? Ein kritischer Kommentar zu J{\"o}rn Knoblochs Beitrag in Heft 4/2023}, series = {Berliner Journal f{\"u}r Soziologie (ISSN: 1862-2593)}, volume = {34}, journal = {Berliner Journal f{\"u}r Soziologie (ISSN: 1862-2593)}, number = {3}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, issn = {0863-1808}, doi = {10.1007/s11609-024-00535-2}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2412102126103.260519352471}, pages = {443 -- 460}, year = {2024}, abstract = {Der Kommentar setzt sich kritisch mit J{\"o}rn Knoblochs Analyse des Corona-Pandemiemanagements in Deutschland auseinander. Er hinterfragt die Behauptung Knoblochs, durch eine st{\"a}rkere Ber{\"u}cksichtigung von Sozialwissenschaftlern in den einschl{\"a}gigen Beratungsgremien h{\"a}tte eine effektivere Krisenbew{\"a}ltigung erreicht werden k{\"o}nnen. Der Beitrag fokussiert zum einen die strukturellen epistemischen Grenzen sowohl der biomedizinischen Wissenschaften als auch der empirischen Sozialforschung. Zum anderen beleuchtet er die Eigenlogik politischer Entscheidungsprozesse, die durch die Notwendigkeit der Unsicherheitsabsorption und Systemstabilisierung gepr{\"a}gt sind und gegen{\"u}ber externen Einfl{\"u}ssen als relativ immun erscheinen. Der Beitrag pl{\"a}diert f{\"u}r eine differenzierte Betrachtung der Schnittstelle zwischen wissenschaftlicher Beratung und politischer Praxis und mahnt eine kritische Reflexion der Rolle und der Grenzen der wissenschaftsgest{\"u}tzten Politikberatung an.}, subject = {-}, language = {de} } @article{AndraschkoDannerKreuzer2024, author = {Andraschko, Bernhard and Danner, Julian and Kreuzer, Martin}, title = {SAT Solving Using XOR-OR-AND Normal Forms}, series = {Mathematics in Computer Science (ISSN: 1661-8289)}, volume = {18}, journal = {Mathematics in Computer Science (ISSN: 1661-8289)}, number = {4}, publisher = {Springer International Publishing}, address = {Cham}, issn = {1661-8270}, doi = {10.1007/s11786-024-00594-x}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2502242130589.859216082138}, pages = {26 Seiten}, year = {2024}, abstract = {This paper introduces the XOR-OR-AND normal form (XNF) for logical formulas. It is a generalization of the well-known Conjunctive Normal Form (CNF) where literals are replaced by XORs of literals. As a first theoretic result, we show that every CNF formula is equisatisfiable to a formula in 2-XNF, i.e., a formula in XNF where each clause involves at most two XORs of literals. Subsequently, we present an algorithm which converts Boolean polynomials efficiently from their Algebraic Normal Form (ANF) to formulas in 2-XNF. Experiments with the cipher ASCON-128 show that cryptographic problems, which by design are based strongly on XOR-operations, can be represented using far fewer variables and clauses in 2-XNF than in CNF. In order to take advantage of this compact representation, new SAT solvers based on input formulas in 2-XNF need to be designed. By taking inspiration from graph-based 2-CNF SAT solving, we devise a new DPLL-based SAT solver for formulas in 2-XNF. Among others, we present advanced pre- and in-processing techniques. Finally, we give timings for random 2-XNF instances and instances related to key recovery attacks on round reduced ASCON-128, where our solver outperforms state-of-the-art alternative solving approaches.}, subject = {-}, language = {en} } @article{Heinrich2024, author = {Heinrich, Horst-Alfred}, title = {Partizipationsvorstellungen von B{\"u}rger:innen: Eine explorative Anwendung der Draw\&Write-Technik als Survey-Instrument}, series = {Zeitschrift f{\"u}r Politikwissenschaft (ISSN: 2366-2638)}, volume = {34}, journal = {Zeitschrift f{\"u}r Politikwissenschaft (ISSN: 2366-2638)}, number = {3}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, issn = {1430-6387}, doi = {10.1007/s41358-024-00378-6}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2412202107197.782688552245}, pages = {425 -- 445}, year = {2024}, abstract = {In einer bayernweiten postalischen Umfrage wurden unter Anwendung der Draw\&Write -Technik die Zielpersonen gebeten, ihre Vorstellung von Demokratie zu zeichnen. Eine Bildtypenanalyse ergab zwar, dass die Bilder im erhobenen Datensatz die große Bedeutung best{\"a}tigen, die der Wahl in der Demokratie zukommt. Doch f{\"u}hrt die in diesem Bereich neue Methode zu beachtlichen Differenzen verglichen mit den Ergebnissen standardisierter Umfragen. Der Mehrwert der Draw\&Write -Technik zeigt sich darin, dass das Datenmaterial nicht nur die bekannten Kategorien der repr{\"a}sentativen, direktdemokratischen, deliberativen oder demonstrativen Beteiligung spiegelt. Ein Teil der Zeichnungen wurde zwei weiteren Kategorien zugeordnet: 1) Klagen {\"u}ber empfundene Ohnmacht und Einflusslosigkeit angesichts eines repr{\"a}sentativen Herrschaftssystems sowie 2) Appelle an Konsensf{\"a}higkeit und die Bereitschaft zur Verantwortungs{\"u}bernahme als Bedingungen, die die B{\"u}rger:innen erf{\"u}llen m{\"u}ssen, wenn Beteiligung am politischen Prozess gelingen soll. Weiterhin ist das Ergebnis von großem Wert, weil das Zeichnen im Rahmen eines postalischen Surveys genutzt wurde. Ein Bias besteht lediglich hinsichtlich der Bildungsvariable, was aber auch bei der Anwendung offener Fragen zu erwarten w{\"a}re.}, subject = {-}, language = {de} } @article{Rieger2024, author = {Rieger, Eva}, title = {A Manchurian Candidate? The GOP's Discourse on the Russian War in Ukraine}, series = {Politische Vierteljahresschrift (ISSN: 1862-2860)}, volume = {66}, journal = {Politische Vierteljahresschrift (ISSN: 1862-2860)}, number = {1}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, issn = {0032-3470}, doi = {10.1007/s11615-024-00558-7}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2411132119230.713822872360}, pages = {77 -- 99}, year = {2024}, abstract = {The United States has a longstanding tradition regarding its overall foreign policy, in the form of a bipartisan consensus. This includes—among other things—maintaining alliances and curbing the influence of rivals (e.g., Russia). Since this consensus has been in place, traditionally the Republican Party (GOP) has been especially intent on a less cooperative and more containing or deterring stance towards Russia. With former U.S. President Donald Trump, we can see a turning point in this behaviour by the GOP. Trump's obvious admiration for Russian president Putin and his statements about Putin being overly favourable, while simultaneously questioning NATO and the United States' commitment to defend Eastern European partners, show a distinctive shift in the GOP's discourse. This renunciation has subsequently been picked up by parts of the Republican Party, rendering the bipartisan consensus a contested issue. The full-scale Russian invasion of Ukraine in February 2022 now constitutes an important external shock influencing said discursive shift. By drawing on discourse-bound identity theory and discourse analysis, the GOP's discourse regarding Russia and NATO is expected to have (substantially) changed in a kind of Zeitenwende —back towards the bipartisan consensus. This article will, therefore, analyse the statements of prominent Republicans after the Russian invasion, compare them to Trump's positions on these issues, and identify whether the invasion serves as a formative event that creates an overall shift in rhetoric and positions.}, subject = {-}, language = {en} } @article{GoerigkKhosravi2024, author = {Goerigk, Marc and Khosravi, Mohammad}, title = {Robust combinatorial optimization problems under budgeted interdiction uncertainty}, series = {OR Spectrum (ISSN: 1436-6304)}, volume = {47}, journal = {OR Spectrum (ISSN: 1436-6304)}, number = {1}, publisher = {Springer}, address = {Berlin/Heidelberg}, issn = {0171-6468}, doi = {10.1007/s00291-024-00772-0}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2408131120370.349068848723}, pages = {255 -- 285}, year = {2024}, abstract = {In robust combinatorial optimization, we would like to find a solution that performs well under all realizations of an uncertainty set of possible parameter values. How we model this uncertainty set has a decisive influence on the complexity of the corresponding robust problem. For this reason, budgeted uncertainty sets are often studied, as they enable us to decompose the robust problem into easier subproblems. We propose a variant of discrete budgeted uncertainty for cardinality-based constraints or objectives, where a weight vector is applied to the budget constraint. We show that while the adversarial problem can be solved in linear time, the robust problem becomes NP-hard and not approximable. We discuss different possibilities to model the robust problem and show experimentally that despite the hardness result, some models scale relatively well in the problem size.}, subject = {-}, language = {en} } @article{BeurskensScherzinger2024, author = {Beurskens, Michael and Scherzinger, Stefanie}, title = {Legal Perspectives on Research Data Storage}, series = {Datenbank-Spektrum (ISSN: 1618-2162)}, volume = {24}, journal = {Datenbank-Spektrum (ISSN: 1618-2162)}, number = {2}, publisher = {Springer}, address = {Berlin/Heidelberg}, issn = {1618-2162}, doi = {10.1007/s13222-024-00478-1}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2410012125227.647518861484}, pages = {85 -- 95}, year = {2024}, abstract = {Responsibly managing research data has become increasingly important for researchers, especially within the database research community. Despite significant progress in best practices, the state-of-the-art in research data storage is lacking from a legal perspective. We introduce the stakeholders and the dynamic nature of their relationships (such as researchers changing affiliation) and observe that no existing infrastructure for research data storage fully meets their requirements. Therefore, we emphasize the need to design a comprehensive system architecture for research data storage that is aligned with legal considerations from the start, rather than as an afterthought.}, language = {en} } @article{Sinn2024, author = {Sinn, Johanna}, title = {Grenzen aufopfernder Pflege}, series = {Zeitschrift f{\"u}r Ethik und Moralphilosophie (ISSN: 2522-0071)}, volume = {7}, journal = {Zeitschrift f{\"u}r Ethik und Moralphilosophie (ISSN: 2522-0071)}, number = {1}, publisher = {Springer}, address = {Berlin/Heidelberg}, issn = {2522-0071}, doi = {10.1007/s42048-024-00173-6}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2408062121464.920156372049}, pages = {281 -- 284}, year = {2024}, language = {de} } @article{FrankeHeinrichReisch2024, author = {Franke, Jan and Heinrich, Florian and Reisch, Raven T.}, title = {Vision based process monitoring in wire arc additive manufacturing (WAAM)}, series = {Journal of Intelligent Manufacturing (ISSN: 1572-8145)}, volume = {36}, journal = {Journal of Intelligent Manufacturing (ISSN: 1572-8145)}, number = {3}, publisher = {Springer US}, address = {New York}, issn = {0956-5515}, doi = {10.1007/s10845-023-02287-x}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2405052141549.085870766506}, pages = {1711 -- 1721}, year = {2024}, abstract = {A stable welding process is crucial to obtain high quality parts in wire arc additive manufacturing. The complexity of the process makes it inherently unstable, which can cause various defects, resulting in poor geometric accuracy and material properties. This demands for in-process monitoring and control mechanisms to industrialize the technology. In this work, process monitoring algorithms based on welding camera image analysis are presented. A neural network for semantic segmentation of the welding wire is used to monitor the working distance as well as the horizontal position of the wire during welding and classic image processing techniques are applied to capture spatter formation. Using these algorithms, the process stability is evaluated in real time and the analysis results enable the direction independent closed-loop-control of the manufacturing process. This significantly improves geometric fidelity as well as mechanical properties of the fabricated part and allows the automated production of parts with complex deposition paths including weld bead crossings, curvatures and overhang structures.}, language = {en} } @article{AistleitnerFruehwirthProchno2024, author = {Aistleitner, Christoph and Fr{\"u}hwirth, Lorenz and Prochno, Joscha}, title = {Diophantine conditions in the law of the iterated logarithm for lacunary systems}, series = {Probability Theory and Related Fields (ISSN: 1432-2064)}, volume = {192}, journal = {Probability Theory and Related Fields (ISSN: 1432-2064)}, number = {1}, publisher = {Springer}, address = {Berlin/Heidelberg}, issn = {0178-8051}, doi = {10.1007/s00440-024-01272-6}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2406190937284.886045166092}, pages = {545 -- 574}, year = {2024}, abstract = {It is a classical observation that lacunary function systems exhibit many properties which are typical for systems of independent random variables. However, it had already been observed by Erdős and Fortet in the 1950s that probability theory's limit theorems may fail for lacunary sums (sum f(n_k x)) if the sequence ((n_k)_{k ge 1}) has a strong arithmetic "structure". The presence of such structure can be assessed in terms of the number of solutions k, l of two-term linear Diophantine equations (an_k - bn_l = c). As the first author proved with Berkes in 2010, saving an (arbitrarily small) unbounded factor for the number of solutions of such equations compared to the trivial upper bound, rules out pathological situations as in the Erdős-Fortet example, and guarantees that (sum f(n_k x)) satisfies the central limit theorem (CLT) in a form which is in accordance with true independence. In contrast, as shown by the first author, for the law of the iterated logarithm (LIL) the Diophantine condition which suffices to ensure "truly independent" behavior requires saving this factor of logarithmic order. In the present paper we show that, rather surprisingly, saving such a logarithmic factor is actually the optimal condition in the LIL case. This result reveals the remarkable fact that the arithmetic condition required of ((n_k)_{k ge 1}) to ensure that (sum f(n_k x)) shows "truly random" behavior is a different one at the level of the CLT than it is at the level of the LIL: the LIL requires a stronger arithmetic condition than the CLT does.}, language = {en} } @article{DonnerMeissnerBort2024, author = {Donner, Eva Katharina and Meißner, Annekatrin and Bort, Suleika}, title = {Moving from voluntary to mandatory sustainability reporting—Transparency in sustainable development goals (SDG) reporting: An analysis of Germany's largest MNCs}, series = {Business Ethics, the Environment \& Responsibility (ISSN: 2694-6424)}, volume = {34}, journal = {Business Ethics, the Environment \& Responsibility (ISSN: 2694-6424)}, number = {3}, publisher = {Wiley}, issn = {2694-6416}, doi = {10.1111/beer.12687}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-16527}, pages = {900 -- 911}, year = {2024}, abstract = {A growing number of multinational companies (MNCs) report on their progress toward contributing to the Sustainable Development Goals (SDGs) in their annual reports, yet the amount and quality of the information they disclose varies significantly. The aim of this study is twofold: First, we investigate how transparent MNCs report on their SDG engagement and second, we study how the reported SDG engagement changed over time due to major shifts in sustainability reporting requirements. Using a dataset of the largest German MNCs, we analyze their disclosure of SDG contribution reporting practices. Our results show that, overall, between 2016 and 2021 all German MNCs increased their SDG reporting activity and that the MNCs adopted four different practices to report their SDG engagement. We also found that the largest MNCs were more transparent and systematic in their SDG reporting than smaller MNCs, whose reporting was more heterogeneous. Our study contributes to legitimacy research and the role of transparency in corporate reporting as well as the debates on the efficacy of sustainability reporting legislation in the context of SDG engagement. Our findings imply that regulations on environmental and social regulation increase the transparency of sustainability reporting.}, language = {en} } @article{NiedervandeVijverUssishkin2024, author = {Nieder, Jessica and van de Vijver, Ruben and Ussishkin, Adam}, title = {Emerging Roots: Investigating Early Access to Meaning in Maltese Auditory Word Recognition}, series = {Cognitive Science (ISSN: 1551-6709)}, volume = {48}, journal = {Cognitive Science (ISSN: 1551-6709)}, number = {11}, publisher = {Wiley}, issn = {0364-0213}, doi = {10.1111/cogs.70004}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-17638}, pages = {36 Seiten}, year = {2024}, abstract = {In Semitic languages, the consonantal root is central to morphology, linking form and meaning. While psycholinguistic studies highlight its importance in language processing, the role of meaning in early lexical access and its representation remain unclear. This study investigates when meaning becomes accessible during the processing of Maltese verb forms, using a computational model based on the Discriminative Lexicon framework. Our model effectively comprehends and produces Maltese verbs, while also predicting response times in a masked auditory priming experiment. Results show that meaning is accessible early in lexical access and becomes more prominent after the target word is fully processed. This suggests that semantic information plays a critical role from the initial stages of lexical access, refining our understanding of real-time language comprehension. Our findings contribute to theories of lexical access and offer valuable insights for designing priming studies in psycholinguistics. Additionally, this study demonstrates the potential of computational models in investigating the relationship between form and meaning in language processing.}, language = {en} } @article{VishnuNampoothiriEntropAnnamalai2024, author = {Vishnu Nampoothiri, Madhavan and Entrop, Oliver and Annamalai, Thillai Rajan}, title = {Effect of mandatory sustainability performance disclosures on firm value: Evidence from listed European firms}, series = {Corporate Social Responsibility and Environmental Management (ISSN: 1535-3966)}, volume = {31}, journal = {Corporate Social Responsibility and Environmental Management (ISSN: 1535-3966)}, number = {6}, publisher = {John Wiley \& Sons, Inc.}, address = {Chichester, UK}, issn = {1535-3958}, doi = {10.1002/csr.2860}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-17620}, pages = {5220 -- 5235}, year = {2024}, abstract = {Corporate Sustainability Performance (CSP) reporting is becoming increasingly important to investors who seek to identify and invest in companies that are managing their Environmental, Social and Governance (ESG) risks effectively. The European Union's Non-Financial Reporting Directive (NFRD), which was implemented in 2017, mandates that certain large companies must disclose their sustainability performance. This study examines the impact of the EU NFRD on the firm value of listed European firms using a difference-in-differences regression model. We find that the mandatory disclosure of corporate sustainability performance does not significantly affect firm value at an aggregate level. However, the results suggest minor inter-industry differences, which can be attributed to varying sustainability performance metrics across industries. These findings contribute not only to the nascent literature on mandatory sustainability disclosures but also to the deliberations of policymakers and regulators across the world who are devising and implementing mandatory corporate sustainability performance disclosure regulations.}, language = {en} } @article{DaschnerObermaier2024, author = {Daschner, Stefan and Obermaier, Robert}, title = {Do We Use Relatively Bad (Algorithmic) Advice? The Effects of Performance Feedback and Advice Representation on Advice Usage}, series = {Journal of Behavioral Decision Making (ISSN: 1099-0771)}, volume = {37}, journal = {Journal of Behavioral Decision Making (ISSN: 1099-0771)}, number = {5}, publisher = {Wiley}, issn = {0894-3257}, doi = {10.1002/bdm.70001}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-17615}, pages = {18 Seiten}, year = {2024}, abstract = {Algorithms are capable of advising human decision-makers in an increasing number of management accounting tasks such as business forecasts. Due to expected potential of these (intelligent) algorithms, there are growing research efforts to explore ways how to boost algorithmic advice usage in forecasting tasks. However, algorithmic advice can also be erroneous. Yet, the risk of using relatively bad advice is largely ignored in this research stream. Therefore, we conduct two online experiments to examine this risk of using relatively bad advice in a forecasting task. In Experiment 1, we examine the influence of performance feedback (revealing previous relative advice quality) and source of advice on advice usage in business forecasts. The results indicate that the provision of performance feedback increases subsequent advice usage but also the usage of subsequent relatively bad advice. In Experiment 2, we investigate whether advice representation, that is, displaying forecast intervals instead of a point estimate, helps to calibrate advice usage towards relative advice quality. The results suggest that advice representation might be a potential countermeasure to the usage of relatively bad advice. However, the effect of this antidote weakens when forecast intervals become less informative.}, language = {en} } @article{RenderEisenbarthOxneretal.2024, author = {Render, Anna and Eisenbarth, Hedwig and Oxner, Matt and Jansen, Petra}, title = {Arousal, interindividual differences and temporal binding a psychophysiological study}, series = {Psychological Research (ISSN: 1430-2772)}, volume = {88}, journal = {Psychological Research (ISSN: 1430-2772)}, number = {5}, publisher = {Springer Berlin Heidelberg}, address = {Berlin/Heidelberg}, issn = {0340-0727}, doi = {10.1007/s00426-024-01976-3}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2410112103084.421385257281}, pages = {1653 -- 1677}, year = {2024}, abstract = {The sense of agency varies as a function of arousal in negative emotional contexts. As yet, it is unknown whether the same is true for positive affect, and how inter-individual characteristics might predict these effects. Temporal binding, an implicit measure of the sense of agency, was measured in 59 participants before and after watching either an emotionally neutral film clip or a positive film clip with high or low arousal. Analyses included participants' individual differences in subjective affective ratings, physiological arousal (pupillometry, skin conductance, heart rate), striatal dopamine levels via eye blink rates, and psychopathy. Linear mixed models showed that sexual arousal decreased temporal binding whereas calm pleasure had no facilitation effect on binding. Striatal dopamine levels were positively linked whereas subjective and physiological arousal may be negatively associated with binding towards actions. Psychopathic traits reduced the effect of high arousal on binding towards actions. These results provide evidence that individual differences influence the extent to which the temporal binding is affected by high arousing states with positive valence.}, language = {en} } @article{LenglerOprisSudholt2024, author = {Lengler, Johannes and Opris, Andre and Sudholt, Dirk}, title = {Analysing Equilibrium States for Population Diversity}, series = {Algorithmica (ISSN: 1432-0541)}, volume = {86}, journal = {Algorithmica (ISSN: 1432-0541)}, number = {7}, publisher = {Springer US}, address = {New York}, issn = {0178-4617}, doi = {10.1007/s00453-024-01226-3}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2406282100292.409184699704}, pages = {2317 -- 2351}, year = {2024}, abstract = {Population diversity is crucial in evolutionary algorithms as it helps with global exploration and facilitates the use of crossover. Despite many runtime analyses showing advantages of population diversity, we have no clear picture of how diversity evolves over time. We study how the population diversity of (μ+1)algorithms, measured by the sum of pairwise Hamming distances, evolves in a fitness-neutral environment. We give an exact formula for the drift of population diversity and show that it is driven towards an equilibrium state. Moreover, we bound the expected time for getting close to the equilibrium state. We find that these dynamics, including the location of the equilibrium, are unaffected by surprisingly many algorithmic choices. All unbiased mutation operators with the same expected number of bit flips have the same effect on the expected diversity. Many crossover operators have no effect at all, including all binary unbiased, respectful operators. We review crossover operators from the literature and identify crossovers that are neutral towards the evolution of diversity and crossovers that are not.}, language = {en} } @article{SchulteLedelHerbold2024, author = {Schulte, Lukas and Ledel, Benjamin and Herbold, Steffen}, title = {Studying the explanations for the automated prediction of bug and non-bug issues using LIME and SHAP}, series = {Empirical Software Engineering (ISSN: 1573-7616)}, volume = {29}, journal = {Empirical Software Engineering (ISSN: 1573-7616)}, number = {4}, publisher = {Springer US}, address = {New York}, issn = {1382-3256}, doi = {10.1007/s10664-024-10469-1}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-2409232103207.812648424894}, pages = {29 Seiten}, year = {2024}, abstract = {Context The identification of bugs within issues reported to an issue tracking system is crucial for triage. Machine learning models have shown promising results for this task. However, we have only limited knowledge of how such models identify bugs. Explainable AI methods like LIME and SHAP can be used to increase this knowledge. Objective We want to understand if explainable AI provides explanations that are reasonable to us as humans and align with our assumptions about the model's decision-making. We also want to know if the quality of predictions is correlated with the quality of explanations. Methods We conduct a study where we rate LIME and SHAP explanations based on their quality of explaining the outcome of an issue type prediction model. For this, we rate the quality of the explanations, i.e., if they align with our expectations and help us understand the underlying machine learning model. Results We found that both LIME and SHAP give reasonable explanations and that correct predictions are well explained. Further, we found that SHAP outperforms LIME due to a lower ambiguity and a higher contextuality that can be attributed to the ability of the deep SHAP variant to capture sentence fragments. Conclusion We conclude that the model finds explainable signals for both bugs and non-bugs. Also, we recommend that research dealing with the quality of explanations for classification tasks reports and investigates rater agreement, since the rating of explanations is highly subjective.}, language = {en} } @article{GeschwindGrafLambsdorff2024, author = {Geschwind, Stephan and Graf Lambsdorff, Johann}, title = {Does scarcity induce hostility? An experimental investigation of common-pool resources}, series = {Ecological Economics (Online ISSN: 1873-6106)}, volume = {2025}, journal = {Ecological Economics (Online ISSN: 1873-6106)}, number = {227}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.ecolecon.2024.108388}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18958}, pages = {17 Seiten}, year = {2024}, abstract = {Climate change is leading to an increased scarcity of resources such as freshwater, energy, arable land and wildlife. This is perceived as a major security threat. However, the literature remains unclear on whether scarcity mitigates or exacerbates conflict. We design a novel laboratory experiment to investigate hostile behavior under scarcity. Participants interact repeatedly in a dynamic common-pool resource (CPR) and a joy-of-destruction game. The experiment distinguishes between two types of scarcity: Endogenous scarcity in the form of a deliberate human choice to overexploit resources and exogenous scarcity in the form of adverse environmental conditions. Our results show that endogenous scarcity exacerbates hostility. We trace this to participants being guided by negative reciprocity while finding no support for inequality aversion. The results indicate that to avoid hostility, policy makers will have to reduce human-induced scarcity. However, our results also show that exogenous scarcity mitigates hostility. This is in line with a vast body of literature from psychology, anthropology and biology finding increased levels of cooperation for all forms of life under environmental distress. It suggests that managing perceptions around increasing scarcities could be a second potential avenue for policy action.}, language = {en} } @article{KinatederGurribChoudhury2024, author = {Kinateder, Harald and Gurrib, Ikhlaas and Choudhury, Tonmoy}, title = {Navigating crises: Gold's role as a safe haven for U.S. sectors}, series = {Finance Research Letters (Online ISSN: 1544-6131)}, volume = {2024}, journal = {Finance Research Letters (Online ISSN: 1544-6131)}, number = {69 B}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.frl.2024.106210}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18974}, pages = {6 Seiten}, year = {2024}, abstract = {This paper investigates the correlation between U.S. sectors and gold, and whether gold can serve as a safe haven for investors in specific U.S. sectors during the global financial crisis, COVID-19, and the Russia-Ukraine war. We use data from the Standard \& Poor's Depository Receipts (SPDR) Select Sector Exchange Traded Fund (ETF) to capture the performance of the respective sectors. Our findings document that gold is a weak safe haven for most U.S. sectors. Gold is not a safe investment for energy, materials, utilities, and consumer staples. Gold does provide vital protection for financial, consumer discretionary, industrial, technology, and healthcare.}, language = {en} } @article{BiglerJanzen2024, author = {Bigler, Patrick and Janzen, Benedikt}, title = {Too hot to sleep}, series = {Journal of Environmental Economics and Management (Online ISSN: 1096-0449)}, volume = {2024}, journal = {Journal of Environmental Economics and Management (Online ISSN: 1096-0449)}, number = {128}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.jeem.2024.103063}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18966}, pages = {17 Seiten}, year = {2024}, language = {en} } @article{HerkenhoffKrautheimSaure2024, author = {Herkenhoff, Philipp and Krautheim, Sebastian and Saur{\´e}, Philip}, title = {A simple model of buyer-seller networks in international trade}, series = {European Economic Review (Online ISSN: 1873-572X)}, volume = {2024}, journal = {European Economic Review (Online ISSN: 1873-572X)}, number = {170}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.euroecorev.2024.104868}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18949}, pages = {29 Seiten}, year = {2024}, abstract = {The recent literature on firm-to-firm trade has documented salient empirical regularities of the buyer-seller network. We show that surprisingly many of these regularities emerge by superimposing the stochastic balls-and-bins structure of Armenter and Koren (2014) to firms in a classical Krugman (1980) model. Our approach amounts to a re-interpretation of Krugman (1980) and relies on randomized bundling of Krugman-varieties into heterogeneous firms, economically neutral 'sales units' that import foreign varieties but belong to local firms, and a statistical reporting threshold that applies to firm-to-firm transactions. We argue that our model provides an important benchmark for the assessment of theoretical models that aim to identify the determinants of firm-to-firm networks.}, language = {en} } @article{KleinePeschkeWagner2024, author = {Kleine, Jens and Peschke, Thomas and Wagner, Niklas}, title = {Beyond financial wealth: The experienced utility of collectibles}, series = {The Quarterly Review of Economics and Finance (Online ISSN: 1878-4259)}, volume = {2024}, journal = {The Quarterly Review of Economics and Finance (Online ISSN: 1878-4259)}, number = {97}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.qref.2024.101865}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18808}, pages = {11 Seiten}, year = {2024}, abstract = {We argue that the utility of specific assets, in our case collectibles, is not only derived from the financial outcome, but also from the conditions that prevail until a financial outcome may be realized. Therefore, we derive a multi-attribute utility function that measures financial returns — using a mean-variance utility function — on the one hand, and non-financial returns — using an experienced utility function — on the other. We then reveal the trade-off between financial and non-financial utility by analyzing 363 owners of collectibles. We divide the owners into the group of collectors and the group of investors, based on their self-reported motivation. Our results suggest that collectors receive almost no utility from financial returns, but rather from experience. The opposite is the case for investors. Our findings help to explain the reported financial underperformance of collectibles and suggest to adjust existing models of utility.}, language = {en} } @article{FritschHauptSchnurbus2024, author = {Fritsch, Markus and Haupt, Harry and Schnurbus, Joachim}, title = {Efficiency of poll-based multi-period forecasting systems for German state elections}, series = {International Journal of Forecasting (Online ISSN: 1872-8200)}, volume = {41 (2025)}, journal = {International Journal of Forecasting (Online ISSN: 1872-8200)}, number = {2}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.ijforecast.2024.04.008}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18793}, pages = {670 -- 688}, year = {2024}, abstract = {Election polls are frequently employed to reflect voter sentiment with respect to a particular election (or fixed-event). Despite their widespread use as forecasts and inputs for predictive algorithms, there is substantial uncertainty regarding their efficiency. This uncertainty is amplified by judgment in the form of pollsters applying unpublished weighting schemes to ensure the representativeness of the sampled voters for the underlying population. Efficient forecasting systems incorporate past information instantly, which renders a given fixed-event unpredictable based on past information. This results in all sequential adjustments of the fixed-event forecasts across adjacent time periods (or forecast revisions) being martingale differences. This paper illustrates the theoretical conditions related to weak efficiency of fixed-event forecasting systems based on traditional least squares loss and asymmetrically weighted least absolute deviations (or quantile) loss. Weak efficiency of poll-based multi-period forecasting systems for all German federal state elections since the year 2000 is investigated. The inefficiency of almost all considered forecasting systems is documented and alternative explanations for the findings are discussed.}, language = {en} } @article{KabluchkoProchnoSonnleitner2024, author = {Kabluchko, Zakhar and Prochno, Joscha and Sonnleitner, Mathias}, title = {A probabilistic approach to Lorentz balls l(^n)(q,1)}, series = {Journal of Functional Analysis (Online ISSN: 1096-0783)}, volume = {2025}, journal = {Journal of Functional Analysis (Online ISSN: 1096-0783)}, number = {288, 1}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.jfa.2024.110682}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18878}, pages = {32 Seiten}, year = {2024}, abstract = {We develop a probabilistic approach to study the volumetric and geometric properties of unit balls |B(^n)(q,1) of finite-dimensional Lorentz sequence spaces l(^n)(q,1). More precisely, we show that the empirical distribution of a random vector X^(n) uniformly distributed on its volume normalized unit ball converges weakly to a compactly supported symmetric probability distribution with explicitly given density; as a consequence we obtain a weak Poincar{\´e}-Maxwell-Borel principle for any fixed number k in |N of coordinates of X^(n) as n grows infinitly. Moreover, we prove a central limit theorem for the largest coordinate of X^(n), demonstrating a quite different behavior than in the case of the l(^n)(q) balls, where a Gumbel distribution appears in the limit. Finally, we prove a Schechtman-Schmuckenschl{\"a}ger type result for the asymptotic volume of intersections of volume normalized l(^n)(q,1) and l(^n)(p) balls.}, language = {en} } @article{VorderobermeierAbelSailer2024, author = {Vorderobermeier, Andrea and Abel, Johannes and Sailer, Maximilian}, title = {Theoretical foundations and approaches in research on educational escape rooms : a systematic review}, series = {Educational Research Review (Online ISSN: 1878-0385)}, volume = {2024}, journal = {Educational Research Review (Online ISSN: 1878-0385)}, number = {44}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.edurev.2024.100625}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18863}, pages = {16 Seiten}, year = {2024}, abstract = {Educational Escape Rooms (EER) as a new teaching tool gained significant attention in the research discourse - especially the last two years. So far, research focused on the practicality, feasibility or description of the development. To provide a more comprehensive understanding to mechanisms within this instructional approach, it is valuable to examine it through the lens of established and well-researched theories and approaches of teaching and learning. Therefore, we identified which theoretical foundations were used in research on Escape Rooms as learning tools and took a look at the extent to which and where they are represented. For this purpose, a systematic review was conducted, which resulted in the identification of 24 articles containing a total of nine theoretical foundations. It is presented how these approaches are applied in EERs and how they are interrelated. Furthermore, we developed six patterns that illustrate the integration of the found theories into the articles. The integration of these theoretical approaches ranges from general statements on theoretical grounding in EERs without connection to didactic considerations to theoretical grounding with empirical validation. Result of the systematic review is that the theoretical foundation in current research on EERs is weak. Therefore, it is argued that future research should focus more on the interweaving of theory, didactic instructions, and practice to gain a better understanding of mechanisms behind successful learning environments with EERs.}, language = {en} } @article{BauerHauptLinner2024, author = {Bauer, Ida and Haupt, Harry and Linner, Stefan}, title = {Pinball boosting of regression quantiles}, series = {Computational Statistics \& Data Analysis (Online ISSN: 1872-7352)}, volume = {2024}, journal = {Computational Statistics \& Data Analysis (Online ISSN: 1872-7352)}, number = {200}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.csda.2024.108027}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18850}, pages = {12 Seiten}, year = {2024}, abstract = {An algorithm for boosting regression quantiles using asymmetric least absolute deviations, better known as pinball loss, is proposed. Existing approaches for boosting regression quantiles are essentially equal to least squares boosting of regression means with the single difference that their working residuals are based on pinball loss. All steps of our boosting algorithm are embedded in the well-established framework of quantile regression, and its main components - sequential base learning, fitting, and updating - are based on consistent scoring rules for regression quantiles. The Monte Carlo simulations performed indicate that the pinball boosting algorithm is competitive with existing approaches for boosting regression quantiles in terms of estimation accuracy and variable selection, and that its application to the study of regression quantiles of hedonic price functions allows the estimation of previously infeasible high-dimensional specifications.}, language = {en} } @article{GrimmSoubeigaWeber2024, author = {Grimm, Michael and Soubeiga, Sidiki and Weber, Michael}, title = {Supporting small firms in a fragile context : comparing matching and cash grants in Burkina Faso}, series = {Journal of Development Economics (Online ISSN: 1872-6089)}, volume = {2024}, journal = {Journal of Development Economics (Online ISSN: 1872-6089)}, number = {171}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.jdeveco.2024.103344}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18848}, pages = {17 Seiten}, year = {2024}, abstract = {We used a randomized controlled trial to compare matching grants earmarked for technical training and consulting services with more flexible cash grants and with a control group. The experiment was implemented in a semi-urban and rural fragile setting where subsidizing innovative activities might be particularly important. Firms were selected on the basis of a business plan competition. After two years, beneficiaries of cash grants showed higher survival rates, improved business practices, a higher degree of formalization, and more activities for innovation relative to recipients of matching grants and the control group, but we saw no effects on profits, sales, and employment. Across all outcomes, beneficiaries of cash grants performed better than beneficiaries of matching grants, for them the treatment effects are smaller and often insignificant, though implementation costs were higher. Recipients of cash grants also increased their capital stock more and were more resilient to the COVID-19 crisis.}, language = {en} } @article{FritschPuaSchnurbus2024, author = {Fritsch, Markus and Pua, Andrew Adrian and Schnurbus, Joachim}, title = {Teaching advanced topics in econometrics using introductory textbooks : the case of dynamic panel data methods}, series = {International Review of Economics Education (Online ISSN: 2352-4421)}, volume = {2024}, journal = {International Review of Economics Education (Online ISSN: 2352-4421)}, number = {47}, publisher = {Elsevier}, address = {Amsterdam}, doi = {10.1016/j.iree.2024.100297}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-18835}, pages = {19 Seiten}, year = {2024}, abstract = {We show how to use the introductory econometrics textbook by Stock and Watson (2019) as a starting point for teaching and studying dynamic panel data methods. The materials are intended for undergraduate students taking their second econometrics course, undergraduate students in seminar-type courses, independent study courses, capstone, or thesis projects, and beginning graduate students in a research methods course. First, we distill the methodological core necessary to understand dynamic panel data methods. Second, we design an empirical and a theoretical case study to highlight the capabilities, downsides, and hazards of the method. The empirical case study is based on the cigarette demand example in Stock and Watson (2019) and illustrates that economic and methodological issues are interrelated. The theoretical case study shows how to evaluate current empirical practices from a theoretical standpoint. We designed both case studies to boost students' confidence in working with technical material and to provide instructors with more opportunities to let students develop econometric thinking and to actively communicate with applied economists. Although we focus on Stock and Watson (2019) and the statistical software R, we also show how to modify the material for use with another introductory textbook by Wooldridge (2020) and Stata, and highlight some possible further pathways for instructors and students to reuse and extend our materials.}, language = {en} }