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See detailSocietal Emotional Environments and Cross-Cultural Differences in Life Satisfaction: A Forty-Nine Country Study
Krys, Kuba; Yeung, June; Capaldi, Colin et al

in Journal of Positive Psychology (in press)

In this paper, we introduce the concept of ‘societal emotional environment’: the emotional climate of a society (operationalized as the degree to which positive and negative emotions are expressed in a ... [more ▼]

In this paper, we introduce the concept of ‘societal emotional environment’: the emotional climate of a society (operationalized as the degree to which positive and negative emotions are expressed in a society). Using data collected from 12,888 participants across 49 countries, we show how societal emotional environments vary across countries and cultural clusters, and we consider the potential importance of these differences for well-being. Multilevel analyses supported a ‘double-edged sword’ model of negative emotion expression, where expression of negative emotions predicted higher life satisfaction for the expresser but lower life satisfaction for society. In contrast, partial support was found for higher societal life satisfaction in positive societal emotional environments. Our study highlights the potential utility and importance of distinguishing between positive and negative emotion expression, and adopting both individual and societal perspectives in well-being research. Individual pathways to happiness may not necessarily promote the happiness of others. [less ▲]

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See detailInvariant density adaptive estimation for ergodic jump diffusion processes over anisotropic classes
Amorino, Chiara UL; Gloter, Arnaud

in Journal of Statistical Planning and Inference (in press)

We consider the solution of a multivariate stochastic differential equation with Levy-type jumps and with unique invariant probability measure with density μ. We assume that a continuous record of ... [more ▼]

We consider the solution of a multivariate stochastic differential equation with Levy-type jumps and with unique invariant probability measure with density μ. We assume that a continuous record of observations is available. In the case without jumps, Reiss and Dalalyan [7] and Strauch [24] have found convergence rates of invariant density estimators, under respectively isotropic and anisotropic H ̈older smoothness constraints, which are considerably faster than those known from standard multivariate density estimation. We extend the previous works by obtaining, in presence of jumps, some estimators which have the same convergence rates they had in the case without jumps for d ≥ 2 and a rate which depends on the degree of the jumps in the one-dimensional setting. We propose moreover a data driven bandwidth selection procedure based on the Goldenshluger and Lepski method [11] which leads us to an adaptive non-parametric kernel estimator of the stationary density μ of the jump diffusion X. [less ▲]

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See detailBetween national language traditions and transnational competence: teaching multilingual academic discourse at the University of Luxembourg
Huemer, Birgit UL

in Donahue, Christiane (Ed.) Teaching and Studying Transnational Composition (in press)

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See detailInteroception, stress and physical symptoms in stress-associated diseases
Schulz, André UL; Schultchen, Dana; Vögele, Claus UL

in European Journal of Health Psychology (in press)

The brain and peripheral bodily organs continuously exchange information. Exemplary, interoception refers to the processing and perception of ascending information from the body to the brain. Stress ... [more ▼]

The brain and peripheral bodily organs continuously exchange information. Exemplary, interoception refers to the processing and perception of ascending information from the body to the brain. Stress responses involve a neurobehavioral cascade, which includes the activation of peripheral organs via neural and endocrine pathways and can thus be seen as an example for descending information on the brain-body axis. Hence, the interaction of interoception and stress represents bi-directional communication on the brain-body axis. The main hypothesis underlying this review is that the dysregulation of brain-body communication represents an important mechanism for the generation of physical symptoms in stress-related disorders. The aims of this review are, therefore, (1.) to summarize current knowledge on acute stress effects on different stages of interoceptive signal processing, (2.) to discuss possible patterns of abnormal brainbody communication (i.e., alterations in interoception and physiological stress axes activation) in mental disorders and chronic physical conditions, and (3.) to consider possible approaches to modify interoception. Due to the regulatory feedback loops underlying brain-body communication, the modification of interoceptive processes (ascending signals) may, in turn, affect physiological stress axes activity (descending signals), and, ultimately, also physical symptoms. [less ▲]

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See detailBorder or bordering practice? Changing perspectives on borders and challenges of praxeological approaches
Connor, Ulla UL

E-print/Working paper (2021)

In Border Studies, the ongoing discussions on methodological and theoretical questions have led to the development of transformed approaches and vocabulary for border research. This contribution ... [more ▼]

In Border Studies, the ongoing discussions on methodological and theoretical questions have led to the development of transformed approaches and vocabulary for border research. This contribution highlights the shift from ‘border’ to ‘bordering practice’ and questions its sources in the scientific context, such as the cultural turn and the related practice turn. Despite the popular use of the term ‘practice’ in Border Studies, sociological practice theories are not at the center of the development of dynamic concepts for studying borders. The article emphasizes the compatibility of sociological practice theories with the practice and process orientation in Border Studies. It gives a short overview of praxeological thinking in sociology and identifies methodological challenges for Border Studies targeting the development of praxeological re-search perspectives for borders. [less ▲]

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See detailMultipath Mitigation Maps feasibility and applicability as an International GNSS Service product
Hunegnaw, Addisu UL; Teferle, Felix Norman UL; Elgered, Gunnar et al

Scientific Conference (2020, December 17)

There have been many advances in the modeling of Global Navigation Satellite System (GNSS) observables when estimating position and other parameters of interest. Some of these bias models are related to ... [more ▼]

There have been many advances in the modeling of Global Navigation Satellite System (GNSS) observables when estimating position and other parameters of interest. Some of these bias models are related to improvements of reference frames, phase center offsets and variations of transmitter and receiver antennas, satellite orbits and clocks, and troposphere. Nonetheless, multipath remains for the most part an unmodelled source of error which causes range errors in the GNSS observations. The associated effects show highly localized features and have a different impact for each receiver and antenna. Multipath errors can propagate, can cause in-situ position biases and are also contributing to the prevalent draconitic harmonic signals. In order to mitigate the problem we generate site-specific corrections by employing a suitable averaging scheme for the stacking of carrier phase residuals. Our processing is based on globally distributed static multi-GNSS observations using several scientific GNSS software packages (Bernese GNSS Software, NAPEOS, GAMIT-GLOBK, and CSRS-PPP). Our multipath stacking maps (MPS) use the stacking of carrier phase residuals generated by variable azimuth cell size (congruent cells) and by allocating carrier phase residuals in each cell to generate the correction maps, unlike the standard fixed azimuth cell resolution approaches. This reduces the binning of fewer residuals at higher elevation angles. Before stacking, we also apply rigorous statistical outlier screening tests for each one-way post-fit carrier phase residual assigned to each of the congruent cells. We thus correct the multipath effects by subtracting the stacked multipath map from the post-fit carrier phase residual. Using this technique we produce a model available in the form of the Antenna Exchange (ANTEX) file format, that can potentially be implemented in routine GNSS analysis with no or little additional overhead for individual analysis centers (ACs). In this study, we assess the feasibility and applicability of the MPS maps as an International GNSS Service (IGS) product for routine GNSS analysis. We demonstrate the multipath stacking technique to result in a significant reduction of the variation in the one-way post-fit carrier phase residuals from multi-GNSS observations. [less ▲]

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See detailVertical Land Movements and Sea Level Changes on South Georgia, South Atlantic Ocean: Results from 7 Years of Geodetic and Oceanographic Observations on a Remote Island
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Hibbert, Angela et al

Scientific Conference (2020, December 16)

South Georgia Island in the South Atlantic Ocean, is a small remote land mass that supports various ground-based instrumental observations (Global Navigation Satellite System (GNSS), tide gauge ... [more ▼]

South Georgia Island in the South Atlantic Ocean, is a small remote land mass that supports various ground-based instrumental observations (Global Navigation Satellite System (GNSS), tide gauge, meteorological and seismic) in an otherwise largely under sampled oceanic region. Moreover, the South Atlantic Ocean plays an important role in global ocean circulation, con-necting the deep thermohaline circulation of the North Atlantic and Indian Oceans, whilst also linking to the Antarctic Circumpolar Current in the South, where the lack of continental barriers allows a free exchange of water between the major ocean basins. Hence, South Georgia po-tentially lies within a region susceptible to climatic changes before these can be felt further afield. In 2013 and 2014 a total of five GNSS stations were installed covering the area of the main island (approximately 170 x 50 km) with two of those being located close to the King Edward Point (KEP) Research Station and the GLOSS tide gauge (ID 187). Furthermore, precise levelling campaigns in 2013, 2014, 2017 and 2020 supported the analysis of local ground instabilities near the tide gauge. Through these activities the tide gauge datum within the Permanent Ser-vice for Mean Sea Level (PSMSL) has been established, which in turn, makes the derived KEP mean sea level (MSL) record highly valuable for long-term studies and satellite altimetry cali-brations. In this study, we will present the vertical land movement estimates from seven years of GNSS observations, five precise levelling campaigns, and will discuss their impact on the sea level record from the KEP tide gauge and nearby satellite altimetry sea surface heights. Our results confirm uplift all over South Georgia Island while the area at KEP and particularly the jetty with tide gauge are subsiding relative to the rest of the island. Using this information we correct the MSL record for the vertical land movements and investigate its signals together with those from nearby satellite altimetry tracks. [less ▲]

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See detailTest
Erkihune, Eshetu Nega UL; Teferle, Felix Norman UL; Hunegnaw, Addisu UL et al

Poster (2020, December 11)

test

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See detailMigration, remittances, and child education in Ghana. Evidence from a longitudinal study
Cebotari, Victor UL

in Konte, Maty; Linguère Mously, Mbaye (Eds.) Migration, Remittances, and Sustainable Development in Africa (2020)

Evidence on the time-varying effects of migration, remittances, and child education in African contexts remains scarce. This study employs panel data to examine educational outcomes – school enjoyment ... [more ▼]

Evidence on the time-varying effects of migration, remittances, and child education in African contexts remains scarce. This study employs panel data to examine educational outcomes – school enjoyment, and class ranking – of children whose parents migrated internally or internationally and who received in-kind remittances, monetary remittances, or both. The data were collected in 2013, 2014, and 2015 on a panel of school-going children and youths aged from 12 to 21 in two urban areas with high out-migration rates in Ghana: Kumasi and Sunyani (N = 741). The panel includes children of both migrant and non-migrant parents. Results indicate dynamic patterns of sending remittances over years, with preferences converging toward sending both in-kind and monetary remittances by internal and international migrant parents. Overall, the education of children benefits when they receive both in-kind and monetary remittances. The positive effects are further enhanced when remittances are directly invested in child education. The absence of remittances has more negative effects on child education, especially for girls. This study gives a more nuanced understanding of the dynamic and intertwined associations between parental migration, remittances, and the education of children in transnational families. [less ▲]

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See detailThe Helpers of Anne Frank - Recontextualising the Rescue of Dutch Jews
Zaagsma, Gerben UL

Scientific Conference (2020, November 24)

This paper sets out to recontextualise the memory of rescue as it pertains to Dutch Jewry during the Holocaust, by focusing on the helpers of Anne Frank and the other Jews in hiding in the Secret Annex ... [more ▼]

This paper sets out to recontextualise the memory of rescue as it pertains to Dutch Jewry during the Holocaust, by focusing on the helpers of Anne Frank and the other Jews in hiding in the Secret Annex. Much in the same way as perceptions of Jews in hiding have been decisively shaped by the story of Anne Frank, not only in the Dutch public imagination but arguably globally, so too the image of help, at least in the Western European and Anglosaxon world, has been considerably shaped by the story of two of the five helpers, Miep and Jan Gies, even if the support they provided to the onderduikers in the Secret Annex could ultimately not prevent discovery. The question of help, as well as the ultimate betrayal, of the onderduikers are linked to the broader question of the role of the Dutch population during the Holocaust. Within that context the Anne Frank story can and has indeed been used to provide both a stereotypical image of Gentile betrayal as well as an idealized and, arguably, romanticized image of Gentile help. In this paper I will trace the ways in which the image of help and rescue of Dutch Jews was shaped by the story of, especially, Miep Gies and analyse the ways in which her story resonated in the Netherlands as well as abroad. Important moments in this regard were the recognition of Miep Gies and the other helpers as Righteous Among the Nations in 1972, and the global publication of Miep Gies’ memoirs in 1987. I will frame this analysis within the broader historical context of 1) help provided to Jews in hiding in the Netherlands and the question of how representative the ‘helpers of Anne Frank’ were, and 2) the extent to which a focus on a few key individuals obscures the more complex reality of how rescue functioned in the first place. [less ▲]

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See detailLëtzbuerger Musek säit dem 2. Weltkrich
Sagrillo, Damien François UL

Conference given outside the academic context (2020)

An dësem Virtrag gëtt d’Museksliewen zu Lëtzebuerg säit dem Zweete Weltkrich behandelt, den Opschwong vun der Amateurmusik an der kuerz dono, an d’Community Music an eisem haitege Medienzäitalter. Déi ... [more ▼]

An dësem Virtrag gëtt d’Museksliewen zu Lëtzebuerg säit dem Zweete Weltkrich behandelt, den Opschwong vun der Amateurmusik an der kuerz dono, an d’Community Music an eisem haitege Medienzäitalter. Déi folgend Aspekter stinn am Mëttelpunkt: D’”Gläichschaltung” vum Museks- a Kulturliewe während der nationalsozialistischer Besatzungszäit unhand vum Beispill vun der Dikrecher Philharmonie. Heiru gëtt kloer, dass déi un der Muecht sech dacks ouni Erfolleg ëm d’Gonscht vun der musizéierender Bevëlkerung beméit hunn a mat wéi engen drastesche Mëttelen si Veräiner begéint sinn, déi net noginn hunn. Am musekssoziologeschen Deel vun der Konferenz gëtt d’Museksveräinsliewen nom Zweete Weltkrich thematiséiert. Den Neiufank no de Krichsjoren huet de Veräiner eng nei Beléiftheet bruecht, déi souguer déi aus der Grënnungszäit iwwertraff huet. Dozou koum, dass d’Aarbechter aus den Industriegebidder am Süde vum Land an de Museken an de Chéier en intellektuellen Ausgläich zu hirer kierperlecher Aarbecht fonnt hunn. De kënschtlereschen Niveau vun de verschiddene Gesellschafte gouf zu engem iwwerregionale Virbild. D’Enn vun der Stolindustrie an den 1980er Jore war och d’Enn vu ville Museksgesellschaften, wéi zum Beispill der Déifferdenger Harmonie Municipale ënnert der Direktioun vum Asca Rampini. Säitdeem huet sech d’Museksliewen ëmmer méi dezentraliséiert. Et gouf versicht, des batter Erfarung mat enger prononcéierter musikalescher Bildung wettzemaachen, wat dozou gefouert huet, dass souguer an den entleeënsten Ecke vum Land Musekscoursen ugebuede goufen. Des Entwécklung huet eng Dezentraliséierung vum ganze Kulturliewen zu Lëtzebuerg matsechbruecht, e weideren Aspekt, deen dëse Virtrag behandele wäert. [less ▲]

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See detailTribune dans Le Monde: Numérique : avec le Covid-19, « la présence physique s’est avérée soudainement porteuse d’une dimension politique »
Becker, Katrin UL

in Le Monde (2020)

La philosophe Katrin Becker estime, dans une tribune au « Monde », que lorsqu’il devient possible de façonner son propre accès aux autres depuis un écran, on en oublie la nécessité des contacts directs ... [more ▼]

La philosophe Katrin Becker estime, dans une tribune au « Monde », que lorsqu’il devient possible de façonner son propre accès aux autres depuis un écran, on en oublie la nécessité des contacts directs, fondements de la coexistence sociale. [less ▲]

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See detailHey, lass uns das zusammen machen!
Feist, Peter; Dusdal, Jennifer UL

Article for general public (2020)

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See detailDesigning of the module envelope of a hybrid modular building to meet the passive house standards in Luxembourg
Rakotonjanahary, Tahiana Roland Michaël UL; Scholzen, Frank UL; Ferreira Silva, Marielle UL et al

in IOP Conference Series: Earth and Environmental Science (2020, November 20), 588(5), 052026

To face the challenges of climate change, new buildings need to be further greener while being able to ensure a minimum comfort to the tenants. Nonetheless, extensibility and flexibility could be added to ... [more ▼]

To face the challenges of climate change, new buildings need to be further greener while being able to ensure a minimum comfort to the tenants. Nonetheless, extensibility and flexibility could be added to buildings. In this context, the architect jointly with the team of this research project have designed a hybrid modular construction called “slab building” which is composed of a permanent concrete structure and several removable wooden modules. A module offers 27m² of living space but larger housings can be realized by combining two up to four modules. The aim of this paper is to design the walls of the modules to meet the criteria of nZEB. The thicknesses of the studied thermal insulations, namely rock wool, wood wool, polyurethane and aerogel, have been determined in accordance with the passive house requirements in Luxembourg. The embodied energy of the building materials has also been considered in the designing of the modules. Steady state calculations revealed that a wall thickness of 40 cm, comprising 31cm of insulation is sufficient but according to the LCA outcomes, there is no environmental benefit in having the modules comply with the AAA energy class requirements at reasonable wall thicknesses. [less ▲]

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See detailPerpetuating Crises at the Source?: (Inter)Regionalism and Normative Incoherence for Sustainable Migration in Africa
Koff, Harlan UL

in Politikon: South African Journal of Political Studiesjavascript:$('next-but').click(); (2020), 47(4), 1-22

In response to the 2015–2016 migration crisis, the European Union established the Emergency Trust Fund for Africa that aimed ‘to address the root causes of instability, forced displacement and irregular ... [more ▼]

In response to the 2015–2016 migration crisis, the European Union established the Emergency Trust Fund for Africa that aimed ‘to address the root causes of instability, forced displacement and irregular migration and to contribute to better migration management.’ This article questions the logic of this approach to migration management by asking whether African regions can ‘better manage migration.’ The article examines the normative bases of migration policies amongst the African Union (AU) and six regional economic communities (RECs), as well as the normative bases of the development strategies pursued by the AU and these RECs. The article proposes normative policy coherence for development as an approach to better understand the relationships between regional integration, sustainable development and migration management in Africa. [less ▲]

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See detailMachine Learning on Graphs
Kozlowski, Diego UL

Presentation (2020, November 18)

Graphs are a ubiquitous data structure that can be exploited in many different problems. In tasks where observations are not independently drawn from the data generating process, but their codependencies ... [more ▼]

Graphs are a ubiquitous data structure that can be exploited in many different problems. In tasks where observations are not independently drawn from the data generating process, but their codependencies add valuable information, a network analysis might be useful for modelling those relations. In this seminar we will discuss about Graph Neural Networks, the deep learning approach for dealing with networks. [less ▲]

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See detailFrom the history of Internet to Internet and Web histories
Schafer, Valerie UL

Presentation (2020, November 18)

This presentation aims to describe the shift from the history of the Internet to Internet histories by analysing several factors (e.g. influence of media history, web sources, maintenance or platform ... [more ▼]

This presentation aims to describe the shift from the history of the Internet to Internet histories by analysing several factors (e.g. influence of media history, web sources, maintenance or platform studies, etc.). [less ▲]

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See detailEffects of Emotional Music on Facial Emotion Recognition in Children with Autism Spectrum Disorder (ASD)
Wagener, Gary; Berning, Madeleine; Pinto Coelho da Costa, Andreia UL et al

in Journal of Autism and Developmental Disorders (2020)

Impaired facial emotion recognition in children with Autism Spectrum Disorder (ASD) is in contrast to their intact emotional music recognition. This study tested whether emotion congruent music enhances ... [more ▼]

Impaired facial emotion recognition in children with Autism Spectrum Disorder (ASD) is in contrast to their intact emotional music recognition. This study tested whether emotion congruent music enhances facial emotion recognition. Accuracy and reaction times were assessed for 19 children with ASD and 31 controls in a recognition task with angry, happy, or sad faces. Stimuli were shown with either emotionally congruent or incongruent music or no music. Although children with ASD had higher reaction times than controls, accuracy only differed when incongruent or no music was played, indicating that congruent emotional music can boost facial emotion recognition in children with ASD. Emotion congruent music may support emotion recognition in children with ASD, and thus may improve their social skills. [less ▲]

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