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See detailConditionality in the European Union External Migration Policy – A Critical Appraisal
Silga, Janine UL

Scientific Conference (2020, January)

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See detailBorders and border experiences
Wille, Christian UL; Nienaber, Birte UL

in Wille, Christian; Nienaber, Birte (Eds.) Border Experiences in Europe. Everyday Life - Working Life - Communication - Languages (2020)

The idea of a “Europe without borders” has been contested for the last decade and is increasingly overshadowed by rebordering phenomena. This development has sparked debates within border studies on how ... [more ▼]

The idea of a “Europe without borders” has been contested for the last decade and is increasingly overshadowed by rebordering phenomena. This development has sparked debates within border studies on how borders should be thought of and investigated. The introductory article deals with this and reconstructs the formation and differentiation of the bordering approach. Furthermore, the concept of border experiences is determined as an investigative perspective that is interested in everyday cultural arenas of bordering processes. It puts the agency of ‘border(lands) residents’ in the center and provides insights into everyday cultural border (re)productions.With this in mind, we will present the book articles in the final section. [less ▲]

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See detailBorder Experiences in Europe. Everyday Life - Working Life - Communication - Languages
Wille, Christian UL; Nienaber, Birte UL

Book published by Nomos (2020)

For a decade now, borders in Europe have been back on the political agenda. Border research has responded and is breaking new ground in thinking about and exploring borders. This book follows this ... [more ▼]

For a decade now, borders in Europe have been back on the political agenda. Border research has responded and is breaking new ground in thinking about and exploring borders. This book follows this development and strengthens a perspective that is interested in life realities and that focuses on everyday cultural experiences of borders. The authors reconstruct such experiences in the context of different forms of migration and mobility as well as language contact situations and are sensitive to the freedom of the participants. In this way, they empirically identify everyday cultural usage or appropriation strategies of borders as vastly different experiences of borders. The readers of this volume will gain insights into current developments in border research and life realities in Europe where borders are (made) relevant. With contributions by Christian Wille, Birte Nienaber, Carsten Yndigegn, Isabelle Pigeron-Piroth, Rachid Belkacem, Ursula Roos, Elisabeth Boesen, Ariela House, Ignacy Jóźwiak, Corinne Martin, Erika Kalocsányiová, Xosé-Afonso Álvarez, Konstanze Jungbluth, Florian Dost, Nicole Richter, Dominik Gerst [less ▲]

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See detailL’édition de chartes à Luxembourg: de l’érudition aux nouvelles technologies (et vice-versa?)
Salemme, Timothy UL

in Bendheim, Amelie (Ed.) Tagungsband Mittelalter zwischen Faszination und Fortschritt (2020)

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See detailThe Migration-Development Nexus in the European Union Policy Framework – A Legal Perspective
Silga, Janine UL

Book published by Cambridge University Press (2020)

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See detailDer Wandel der jugendpolitischen Agenda und die Konsequenzen für die Konzeption der Lebensphase Jugend. Eine Analyse am Beispiel von Jugendpolitik in Luxemburg
Heinen, Andreas UL; Willems, Helmut UL

in Heinen, Andreas; Wiezorek, Christine; Willems, Helmut (Eds.) Entgrenzung der Jugend und Verjugendlichung der Gesellschaft. Zur Notwendigkeit einer »Neuvermessung« jugendtheoretischer Positionen (2020)

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See detailMigration, Asylum and EU Discrimination Law
Silga, Janine UL

in O’Cinneide, Colm; Ringelheim, Julie; Solanke, Iyiola (Eds.) Edward Elgar Research Handbook on European Anti-Discrimination Law (2020)

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See detailThe Ambiguity of the Migration and Development Nexus Policy Discourse: Perpetuating the Colonial Legacy?
Silga, Janine UL

in UCLA Journal of International Law and Foreign Affairs (2020)

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See detailCross-border everyday lives on the Luxembourg border? An empirical approach: the example of cross-border commuters and residential migrants
Wille, Christian UL; Roos, Ursula

in Wille, Christian; Nienaber, Birte (Eds.) Border Experiences in Europe. Everyday Life - Working Life - Communication - Languages (2020)

Luxembourg is characterized by phenomena of mobility that includecross-border commuters and residential migrants. While both groups havebeen mainly examined from a socioeconomic perspective, this ... [more ▼]

Luxembourg is characterized by phenomena of mobility that includecross-border commuters and residential migrants. While both groups havebeen mainly examined from a socioeconomic perspective, this paperadopts a sociocultural approach. We will focus on the question of the ex-tent to which cross-border mobility in everyday life promotes cross-borderlifeworlds. This will involve examining people’s social contacts at theirplace of work and/or place of residence as well as the spatial organizationof practices of the everyday life of both groups. The paper gives insights in-to everyday lives at the EU’s internal borders, whose organization into na-tion states is subordinate and at the same time constitutive. [less ▲]

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See detailWhy is the Market Skewness-Return Relationship Negative?
Lehnert, Thorsten UL

Scientific Conference (2019, December 13)

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we ... [more ▼]

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we consider the usual interpretation of e.g. option-implied skewness as an indicator of jump risk or downside risk. One possible explanation for this inconsistency is that there are factors affecting option-implied market skewness other than jump risk in the stock market. In this paper, I find that price pressure associated with “crowded trades” of mutual funds is an important endogenous factor. Given that retail investors are prone to herding, the directional trading of mutual funds is correlated, and their collective actions can generate short-term price pressure on aggregate stock prices. Short sellers systematically exploit these patterns not only in the equity lending market, but also in the options market. In line with this economic channel, I find that firstly, the significant negative relationship between market skewness and returns becomes insignificant, once I control for price pressure. Secondly, the negative relationship is only present for the “bad” downside component of risk-neutral skewness, associated with out-of-the-money put options. For the “good” upside component of risk-neutral skewness, associated with out-of-the-money call options, the relationship is always positive. Thirdly, price pressure affects the skewness-return relationship, which can be clearly distinguished from the impact of flows on the volatility-return relationship in terms of the leverage effect. [less ▲]

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See detailWhy is the Market Skewness-Return Relationship Negative?
Lehnert, Thorsten UL

Scientific Conference (2019, December 13)

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we ... [more ▼]

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we consider the usual interpretation of e.g. option-implied skewness as an indicator of jump risk or downside risk. One possible explanation for this inconsistency is that there are factors affecting option-implied market skewness other than jump risk in the stock market. In this paper, I find that price pressure associated with “crowded trades” of mutual funds is an important endogenous factor. Given that retail investors are prone to herding, the directional trading of mutual funds is correlated, and their collective actions can generate short-term price pressure on aggregate stock prices. Short sellers systematically exploit these patterns not only in the equity lending market, but also in the options market. In line with this economic channel, I find that firstly, the significant negative relationship between market skewness and returns becomes insignificant, once I control for price pressure. Secondly, the negative relationship is only present for the “bad” downside component of risk-neutral skewness, associated with out-of-the-money put options. For the “good” upside component of risk-neutral skewness, associated with out-of-the-money call options, the relationship is always positive. Thirdly, price pressure affects the skewness-return relationship, which can be clearly distinguished from the impact of flows on the volatility-return relationship in terms of the leverage effect. [less ▲]

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See detailTeachers' Implicit Attitudes Toward Students From Different Social Groups: A Meta-Analysis
Pit-Ten Cate, Ineke UL; Glock, Sabine UL

in Frontiers in Psychology, section Cognitive Science. (2019)

Teachers' attitudes toward their students have been associated with differential teachers' expectations and, in turn, with students' educational pathways. Theories of social cognition can explain the link ... [more ▼]

Teachers' attitudes toward their students have been associated with differential teachers' expectations and, in turn, with students' educational pathways. Theories of social cognition can explain the link between attitudes and behavior. In this regard, the distinction between implicit and explicit attitudes is worth to be considered, whereby implicit attitudes are automatically activated when the attitude object is present and guide automatic behavior. In contrast, explicit attitudes infer deliberation and reflection, hence affecting controlled behavior. As teachers often are required to act immediately in situations that do not allow for thoughtful reflection due to time restraints, teachers' implicit attitudes concerning different student groups with shared characteristics, such as gender or ethnicity, may be especially important when considering teachers' behavior in relation to students' educational pathways. This notion is reflected by an increased interest in adopting implicit methodology in the educational domain. Over the last 10 years, several studies have been conducted in different countries, involving in- and pre-service teachers and investigating their attitudes toward different student groups. Estimates of effects have varied and may be affected by sampling bias. To systematically review and integrate data from different studies, this meta-analysis focuses on teachers' implicit attitudes. Following the systematic search of the database and initial screening, 43 articles were identified from which 22, describing 34 studies, were retained for the meta-analysis after further inspection. First analyses revealed an estimated average effect size of 0.56 for implicit attitudes in favor of non-marginalized groups. As there was a large extent of heterogeneity between studies, several moderator variables were investigated. Results showed that the employed implicit measure and stimulus materials as well as the student target group affected the effect sizes. Low or non-significant relationships were reported between implicit and explicit attitudes. Findings are discussed in terms of theory and future research. [less ▲]

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See detailConsolidating Observation of Land and Sea Level Changes around South Georgia Island
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Hibbert, Angela et al

Poster (2019, December 13)

With its mid-ocean location in the Southern Atlantic Ocean South Georgia Island is in a key position for the oceanic and geodetic global monitoring networks. Since 2013 the tide gauge at King Edward Point ... [more ▼]

With its mid-ocean location in the Southern Atlantic Ocean South Georgia Island is in a key position for the oceanic and geodetic global monitoring networks. Since 2013 the tide gauge at King Edward Point (KEP) with GLOSS ID 187 has been monitored using a GNSS station nearby on Brown Mountain. By accurately geo-referencing the tide gauge and monitoring any vertical land movements, a continuous record of its datum within the Permanent Service for Mean Sea Level (PSMSL) can be established, which in turn makes the recorded and averaged sea levels useful for long-term studies and satellite altimetry calibrations. In 2014 another GNSS station was installed at KEP after local subsidence was sus-pected and later on three additional GNSS stations came to service at the periphery of the main island, making it possible to monitor uplift/subsidence wider afield. Further-more, together with four precise levelling campaigns of the KEP benchmark network in 2013, 2014 and two in 2017, it has also been possible to investigate the very local character of the vertical motions near KEP, i.e. the stability of the jetty upon which the tide gauge is mounted. In this study, we will present the results from the GNSS and precise levelling meas-urements, and will discuss their impact on the sea level record from the KEP tide gauge and nearby satellite altimetry sea surface heights. This study comes at a timely manner as during the Austral Summer 2019/2020 the jetty will be stabilized and en-larged, and consequently the current tide gauge will be replaced by a new one. Our measurements show that uplift is observed all over South Georgia Island while the ar-ea at KEP and particularly the jetty with tide gauge are subsiding relative to the rest of the island. In contrast, results for the tide gauge record show a lower magnitude of ob-served sea level rise than expected from nearby satellite altimetry. We will revisit all geodetic and oceanic observations in an attempt to improve the agreement between these measurements to summarize the status before the work at the jetty begins. [less ▲]

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See detailDEVELOPING INDIVIDUAL-BASED GUT MICROBIOME METABOLIC MODELS FOR THE INVESTIGATION OF PARKINSON’S DISEASE-ASSOCIATED INTESTINAL MICROBIAL COMMUNITIES
Baldini, Federico UL

Doctoral thesis (2019)

The human phenotype is a result of the interactions of environmental factors with genetic ones. Some environmental factors such as the human gut microbiota composition and the related metabolic functions ... [more ▼]

The human phenotype is a result of the interactions of environmental factors with genetic ones. Some environmental factors such as the human gut microbiota composition and the related metabolic functions are known to impact human health and were put in correlation with the development of different diseases. Most importantly, disentangling the metabolic role played by these factors is crucial to understanding the pathogenesis of complex and multifactorial diseases, such as Parkinson’s Disease. Microbial community sequencing became the standard investigation technique to highlight emerging microbial patterns associated with different health states. However, even if highly informative, such technique alone is only able to provide limited information on possible functions associated with specific microbial communities composition. The integration of a systems biology computational modeling approach termed constraint-based modeling with sequencing data (whole genome sequencing, and 16S rRNA gene sequencing), together with the deployment of advanced statistical techniques (machine learning), helps to elucidate the metabolic role played by these environmental factors and the underlying mechanisms. The first goal of this PhD thesis was the development and deployment of specific methods for the integration of microbial abundance data (coming from microbial community sequencing) into constraint-based modeling, and the analysis of the consequent produced data. The result was the implementation of a new automated pipeline, connecting all these different methods, through which the study of the metabolism of different gut microbial communities was enabled. Second, I investigated possible microbial differences between a cohort a Parkinson’s disease patients and controls. I discovered microbial and metabolic changes in Parkinson’s disease patients and their relative dependence on several physiological covariates, therefore exposing possible mechanisms of pathogenesis of the disease.Overall, the work presented in this thesis represents method development for the investigation of before unexplored functional metabolic consequences associated with microbial changes of the human gut microbiota with a focus on specific complex diseases such as Parkinson’s disease. The consequently formulated hypothesis could be experimentally validated and could represent a starting point to envision possible clinical interventions. [less ▲]

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See detailLa grande-duchesse Marie-Adélaïde en version non falsifiée
Scuto, Denis UL

Article for general public (2019)

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See detailFunctional inequalities on path space of sub-Riemannian manifolds and applications
Cheng, Li Juan UL; Grong, Erlend; Thalmaier, Anton UL

E-print/Working paper (2019)

For sub-Riemannian manifolds with a chosen complement, we first establish the derivative formula and integration by parts formula on path space with respect to a well-defined gradient operator. By using ... [more ▼]

For sub-Riemannian manifolds with a chosen complement, we first establish the derivative formula and integration by parts formula on path space with respect to a well-defined gradient operator. By using these formulae, we then show that upper and lower bounds of the horizontal Ricci curvature correspond to functional inequalities on path space analogous to what has been established in Riemannian geometry by Aaron Naber, such as gradient inequalities, log-Sobolev and Poincaré inequalities. [less ▲]

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See detailDependability Assessment of the Android OS Through Fault Injection
Iannillo, Antonio Ken UL; Cotroneo, Domenico; Natella, Roberto et al

in IEEE Transaction on Reliability (2019)

The reliability of mobile devices is a challenge for vendors since the mobile software stack has significantly grown in complexity. In this article, we study how to assess the impact of faults on the ... [more ▼]

The reliability of mobile devices is a challenge for vendors since the mobile software stack has significantly grown in complexity. In this article, we study how to assess the impact of faults on the quality of user experience in the Android mobile OS through fault injection. We first address the problem of identifying a realistic fault model for the Android OS, by providing developers a set of lightweight and systematic guidelines for fault modeling. Then, we present an extensible fault injection tool (AndroFIT) to apply such fault model on actual, commercial Android devices. Finally, we present a large fault injection experimentation on three Android products from major vendors and point out several reliability issues and opportunities for improving the Android OS. [less ▲]

Detailed reference viewed: 79 (1 UL)