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See detailInstitutionalism and Comparative Administrative Law Beyond the Liberal State: Extrapolations from Santi Romano as seen by D’Alberti
Mendes, Joana UL

in VV., AA. (Ed.) Liber Amicorum Marco D’Alberti (in press)

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See detailUnpacking Tourism in the Cold War: International Tourism and Commercialism in Socialist Romania, 1960s-1980s
Stefan, Oana Adelina UL

in Contemporary European History (in press)

The role of market oriented tourist policies in the planned economies of socialist Eastern Europe has been long overlooked. This article examines how the socialist regime in Romania moved from sheer ... [more ▼]

The role of market oriented tourist policies in the planned economies of socialist Eastern Europe has been long overlooked. This article examines how the socialist regime in Romania moved from sheer ideological rhetoric to commercialism and market-driven strategies when promoting Romania as a tourist destination in the ‘West’ between the 1960s and the 1980s. It argues that there was a continual shifting between using tourism as an ideological tool and a certain pragmatism that was needed to turn Romania into a desirable tourist destination. [less ▲]

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See detailProcedural Principles
Hofmann, Herwig UL

in Ziegler, Katja (Ed.) General Principles of EU Law, Oxford University Press (in press)

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See detailThe DLT Sandbox under the Pilot-Regulation
Zetzsche, Dirk Andreas UL; Woxholth, Jannik Per UL

in Capital Markets Law Journal (in press)

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See detailNonstandard n-distances based on certain geometric constructions
Kiss, Gergely; Marichal, Jean-Luc UL

in Beiträge zur Algebra und Geometrie (in press)

The concept of n-distance was recently introduced to generalize the classical definition of distance to functions of n arguments. In this paper we investigate this concept through a number of examples ... [more ▼]

The concept of n-distance was recently introduced to generalize the classical definition of distance to functions of n arguments. In this paper we investigate this concept through a number of examples based on certain geometrical constructions. In particular, our study shows to which extent the computation of the best constant associated with an n-distance may sometimes be difficult and tricky. It also reveals that two important graph theoretical concepts, namely the total length of the Euclidean Steiner tree and the total length of the minimal spanning tree constructed on n points, are instances of n-distances. [less ▲]

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See detailEuropäisches Kapitalmarktrecht: Intermediärsrecht
Zetzsche, Dirk Andreas UL; Preiner, Christina

in Hatje/Müller-Graf (Ed.) in Encyklopedia on European Law, Vol. VIII (in press)

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See detailDeux visions du Saint-Empire : Jacques Dex et Vigneulles
Lazzari, Antoine UL

in Dauphant, Léonard (Ed.) Metz 1500 : Pouvoir, société et culture urbaine au temps de Philippe de Vigneulles (in press)

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See detailEuropäische Grenzraumforschung in Zeiten der Vergrenzung: Problemaufriss und Perspektiven.
Wille, Christian UL

in Brodowski, Dominik; Nesselhauf, Jonas; Weber, Florian (Eds.) Pandemisches Virus – nationales Handeln: Covid-19 und die europäische Idee (in press)

Spätestens seit der Covid-19-Pandemie ist die Rolle von Grenzen, die in den letzten Jahrzehnten an Bedeutung gewonnen haben, nicht mehr zu übersehen. Diese Entwicklung, die sich mühelos auf der globalen ... [more ▼]

Spätestens seit der Covid-19-Pandemie ist die Rolle von Grenzen, die in den letzten Jahrzehnten an Bedeutung gewonnen haben, nicht mehr zu übersehen. Diese Entwicklung, die sich mühelos auf der globalen Ebene rekonstruieren lässt, ist mit dem Virus auch in die europäischen Grenzregionen vorgedrungen. Dort ist die europäische Grenzraumforschung nun mit Phänomenen konfrontiert, mit denen sie sich bisher kaum auseinandergesetzt hat. Der Beitrag wendet sich solchen Phänomenen zu und arbeitet exemplarisch das Zusammenspiel von Ver- und Entgrenzungsprozessen im Kontext des Covidfencing heraus. Dafür werden soziale Aushandlungsprozesse der Grenzschließungen in der Großregion SaarLorLux und im deutsch-polnischen Grenzgebiet als „people’s resilience“ thematisiert. Darauf aufbauend werden Überlegungen vorgestellt, wie sich die europäische Grenzraumforschung für Phänomene und Fragestellungen in Zeiten der Vergrenzungen aufstellen kann. Der internationalen Grenzforschung folgend wird eine Erweiterung der Forschungsagenda um alltagskulturelle Fragen vorgeschlagen, die einen Erkenntnisgewinn versprechen. Außerdem wird eine Justierung des verbreiteten Grenzbegriffs vorgeschlagen, um die Grenze als Gegenstand alltagskultureller Aushandlungen erschließbar zu machen. [less ▲]

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See detailZufriedenheit - Wohlbefinden - Anerkennung. Ein Blick hinter die Kulissen non-formaler Bildungseinrichtungen in Luxemburg
Baltes-Löhr, Christel; Schumacher, Anette UL; Biewers, Sandra UL

Book published by Barbara Budrich Verlag (in press)

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See detailZufriedenheit, Wohlbefinden und Anerkennung: Kontextualisierung und theoretische Einordnung der Konzepte und ihrer Bedeutung für die institutionellen Felder der non-formalen Bildung
Baltes-Löhr, Christel; Schumacher, Anette UL; Biewers, Sandra UL

in Zufriedenheit - Wohlbefinden - Anerkennung. Ein Blick hinter die Kulissen non-formaler Bildungseinrichtungen in Luxemburg (in press)

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See detailZufriedenheit mit der institutionellen Betreuung von Kindern im Alter von bis zu 4 Jahren
Schumacher, Anette UL; Baltes-Löhr, Christel

in Zufriedenheit - Wohlbefinden - Anerkennung. Ein Blick hinter die Kulissen non-formaler Bildungseinrichtungen in Luxemburg (in press)

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See detailWohlbefinden von Kindern im Alter von 4-12 Jahren in Kinderbetreuungseinrichtungen
Schumacher, Anette UL

in Zufriedenheit - Wohlbefinden - Anerkennung. Ein Blick hinter die Kulissen non-formaler Bildungseinrichtungen in Luxemburg (in press)

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See detailMultiperspektivische Einblicke in die Forschungslage zur non-formalen Bildung in Luxemburg. Eine Zusammenfassung.
Baltes-Löhr, Christel UL; Schumacher, Anette UL; Biewers, Sandra UL

in Zufriedenheit - Wohlbefinden - Anerkennung. Ein Blick hinter die Kulissen non-formaler Bildungseinrichtungen in Luxemburg (in press)

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See detailMothers’ and fathers’ reflective functioning and its association with parenting behaviors and cortisol reactivity during a conflict interaction with their adolescent children
Decarli, Alessandro; Schulz, André UL; Pierrehumbert, Blaise et al

in Emotion (in press)

We assessed parental reflective functioning (PRF) with the Parent Development Interview - Revised, and investigated its association with parenting behaviors, i.e., autonomy support and psychological ... [more ▼]

We assessed parental reflective functioning (PRF) with the Parent Development Interview - Revised, and investigated its association with parenting behaviors, i.e., autonomy support and psychological control (operationalized in terms of behaviors promoting and undermining autonomy relatedness), and stress responses (cortisol reactivity) during a parent-child conflict interaction task (Family Interaction Task). Participants were 40 mothers and 28 fathers, who took part in the study together with their adolescent children (N = 49). Mothers had significantly lower PRF and displayed more psychologically controlling behaviors in the interaction with their children than fathers. Rather than sex per se, high levels of PRF were the best predictors of autonomy support, whereas lower levels of PRF predicted more psychological control. Higher levels of PRF were also the best predictor for lower levels of parenting stress. Stress in the context of parenting was neither related to autonomy support nor to psychological control, which were best predicted by divorced family status. The findings point to the potential utility of interventions aimed at improving PRF and stress management in the context of parenting, especially in divorced families, given their protective effects on parenting behaviors. [less ▲]

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See detailZur Wechselseitigkeit von Sozialer Anerkennung und Selbstbildung: Jugendliche und junge Erwachsene im Alter zwischen 12 und 30 Jahren in Einrichtungen der Jugendarbeit
Biewers, Sandra UL; Weis, Daniel UL; Latz, Anita UL

in Baltes-Löhr, Christel; Schumacher, Anette; Biewers, Sandra (Eds.) Zufriedenheit - Wohlbefinden - Anerkennung. Ein Blick hinter die Kulissen non-formaler Bildungseinrichtungen in Luxemburg (in press)

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See detailBismut-Stroock Hessian formulas and local Hessian estimates for heat semigroups and harmonic functions on Riemannian manifolds
Chen, Qin-Qian; Cheng, Li-Juan; Thalmaier, Anton UL

in Stochastic Partial Differential Equations: Analysis and Computations (in press)

In this article, we develop a martingale approach to localized Bismut-type Hessian formulas for heat semigroups on Riemannian manifolds. Our approach extends the Hessian formulas established by Stroock ... [more ▼]

In this article, we develop a martingale approach to localized Bismut-type Hessian formulas for heat semigroups on Riemannian manifolds. Our approach extends the Hessian formulas established by Stroock (1996) and removes in particular the compact manifold restriction. To demonstrate the potential of these formulas, we give as application explicit quantitative local estimates for the Hessian of the heat semigroup, as well as for harmonic functions on regular domains in Riemannian manifolds. [less ▲]

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See detailFedFog: Network-Aware Optimization of Federated Learning over Wireless Fog-Cloud System
Nguyen, van Dinh UL; Chatzinotas, Symeon UL; Ottersten, Björn UL et al

in IEEE Transactions on Wireless Communications (in press)

Federated learning (FL) is capable of performing large distributed machine learning tasks across multiple edge users by periodically aggregating trained local parameters. To address key challenges of ... [more ▼]

Federated learning (FL) is capable of performing large distributed machine learning tasks across multiple edge users by periodically aggregating trained local parameters. To address key challenges of enabling FL over a wireless fogcloud system (e.g., non-i.i.d. data, users’ heterogeneity), we first propose an efficient FL algorithm based on Federated Averaging (called FedFog) to perform the local aggregation of gradient parameters at fog servers and global training update at the cloud. Next, we employ FedFog in wireless fog-cloud systems by investigating a novel network-aware FL optimization problem that strikes the balance between the global loss and completion time. An iterative algorithm is then developed to obtain a precise measurement of the system performance, which helps design an efficient stopping criteria to output an appropriate number of global rounds. To mitigate the straggler effect, we propose a flexible user aggregation strategy that trains fast users first to obtain a certain level of accuracy before allowing slow users to join the global training updates. Extensive numerical results using several real-world FL tasks are provided to verify the theoretical convergence of FedFog. We also show that the proposed co-design of FL and communication is essential to substantially improve resource utilization while achieving comparable accuracy of the learning model. [less ▲]

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See detailReinforcement Learning for Test Case Prioritization
Bagherzadeh, Mojtaba; Kahani, Nafiseh; Briand, Lionel UL

in IEEE Transactions on Software Engineering (in press)

Continuous Integration (CI) context significantly reduces integration problems, speeds up development time, and shortens release time. However, it also introduces new challenges for quality assurance ... [more ▼]

Continuous Integration (CI) context significantly reduces integration problems, speeds up development time, and shortens release time. However, it also introduces new challenges for quality assurance activities, including regression testing, which is the focus of this work. Though various approaches for test case prioritization have shown to be very promising in the context of regression testing, specific techniques must be designed to deal with the dynamic nature and timing constraints of CI. Recently, Reinforcement Learning (RL) has shown great potential in various challenging scenarios that require continuous adaptation, such as game playing, real-time ads bidding, and recommender systems. Inspired by this line of work and building on initial efforts in supporting test case prioritization with RL techniques, we perform here a comprehensive investigation of RL-based test case prioritization in a CI context. To this end, taking test case prioritization as a ranking problem, we model the sequential interactions between the CI environment and a test case prioritization agent as an RL problem, using three alternative ranking models. We then rely on carefully selected and tailored state-of-the-art RL techniques to automatically and continuously learn a test case prioritization strategy, whose objective is to be as close as possible to the optimal one. Our extensive experimental analysis shows that the best RL solutions provide a significant accuracy improvement over previous RL-based work, with prioritization strategies getting close to being optimal, thus paving the way for using RL to prioritize test cases in a CI context. [less ▲]

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