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See detailWhy do we make Cu(In,Ga)Se2 solar cells non-stoichiometric?
Siebentritt, Susanne UL; Gütay, Levent UL; Regesch, David UL et al

in Solar Energy Materials & Solar Cells (2013)

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See detailWhy do you play World of Warcraft? An in-depth exploration of self-reported motivations to play online and in-game behaviours in the virtual world of Azeroth
Billieux, Joël UL; Van Der Linden, M.; Achab, S. et al

in Computers in Human Behavior (2013), 29(1), 103-109

Massively multiplayer online role-playing games (MMORPGs) are video games in which players create an avatar that evolves and interacts with other avatars in a persistent virtual world. Motivations to play ... [more ▼]

Massively multiplayer online role-playing games (MMORPGs) are video games in which players create an avatar that evolves and interacts with other avatars in a persistent virtual world. Motivations to play MMORPGs are heterogeneous (e.g. achievement, socialisation, immersion in virtual worlds). This study investigates in detail the relationships between self-reported motives and actual in-game behaviours. We recruited a sample of 690 World of Warcraft players (the most popular MMORPG) who agreed to have their avatar monitored for 8 months. Participants completed an initial online survey about their motives to play. Their actual in-game behaviours were measured through the game's official database (the Armory website). Results showed specific associations between motives and in-game behaviours. Moreover, longitudinal analyses revealed that teamwork- and competition-oriented motives are the most accurate predictors of fast progression in the game. In addition, although specific associations exist between problematic use and certain motives (e.g. advancement, escapism), longitudinal analyses showed that high involvement in the game is not necessarily associated with a negative impact upon daily living. © 2012 Elsevier Ltd. All rights reserved. [less ▲]

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See detailWhy does multi-situated ethnography develop new competences for sociological research on the poorest and most excluded populations' health as well as for evidence-based health promotion interventions?
Lurbe-Puerto, Katia UL; Baumann, Michèle UL

in European Society for Health and Medical Sociology (2010)

When extremely poor and excluded populations are concerned, Multi-Situated Ethnography (MSE) represents a valuable research design for health needs and resources diagnosis* and for the improvement of ... [more ▼]

When extremely poor and excluded populations are concerned, Multi-Situated Ethnography (MSE) represents a valuable research design for health needs and resources diagnosis* and for the improvement of health promotion programmes. By focusing on the results of our 2-years community-based participatory study on prevention amongst Roma populations living in France**, we will assess the potentials of ethnography-based research for both scientific production and health promotion interventions. Methods/actions. A MSE has been carried in three distinct scenarios, selected because of the different socio-cultural integration levels and life conditions of the Roma families. There are: 1) the Forest of Mery-sur-Oise, a shanty town where around twenty Roma families live, 2) the collective emergency housing in the old headquarters in Saint-Maur-des-Fossé, and 3) S.A.N. de Sénart, a conglomeration of towns which an integration plan of Roma people was launched in. This fieldwork has produced scientific data on the healthcare provision and the social accompaniment realised by professionals of the health, social and administrative sectors as well as on Roma’s health promotion practices. A reflexive evaluation design was undertaken through the conduction of an expert panel involving 3 sociologists and 3 social workers, meeting each month. Results. The MSE allowed building up comparative relations between health practices and socio-economic and geo-political factors amongst “hermetical populations” when they asked to share information on their life with outsiders. Simultaneously, the data analysis allowed considering: universal similarities, cultural differences and individual singularities. The increased of the methodological procedures as it helped avoid falling into stigma reification of groups already highly racially discriminated. Its participatory dimension helped document and share learning across contexts, providing a renewed source of dynamism amongst professionals dealing with sensitive fields and very difficult to access. Because of the sensitivity brought by its in-depth comprehensive-based approach, it moved closer professionals to their Roma beneficiaries, even leading to cases of conflict resolution between both actors. Conclusion. The acquisition of the required skills to carry out a social and health intervention based on a community-based participatory diagnostic of needs and resources and, on an evaluative follow-up of the actions undertaken within the intervention scenario is a major asset for the elaboration and management of individual or community-dimensioned professional projects. MSE needs to be revisited and revalued as it comprises useful a set of competences to give informed guidance by supplying decision-makers and professionals, with sound and comprehensive analysis. [less ▲]

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See detailWhy medication or tobacco consumption enhance the life satisfaction of cardiovascular patients?
Bucki, Barbara UL; Tchicaya, Anastase; Baumann, Michèle UL

in European Health Psychologist (The) (2015), special

While life satisfaction (LS) promotes the health of cardiovascular patients, LS may be affected by a range of primary and secondary determinants. We analysed LS and its relationships with cardiovascular ... [more ▼]

While life satisfaction (LS) promotes the health of cardiovascular patients, LS may be affected by a range of primary and secondary determinants. We analysed LS and its relationships with cardiovascular risk factors and unhealthy behaviours. Methods. In 2013, 3,632 survivors who underwent coronary angiography in 2008-2009 at the Luxembourgish National Institute of Cardiac Surgery and Cardiological Intervention (INCCI), living at home were asked to estimate, five years after, their LS [1-10] and other health-related variables. Data were analysed via multiple regression models including interaction effects. Findings. LS of the 1,289 participants (age: 69.2±11.1) was 7.3/10. Most were men, employees or manual workers, had secondary education and a 36,000€ or more/year income. The interactions between hypercholesterolemia and hypertension (regression coefficient= 0.628) and with smoking (rc= 0.941) were positively related with LS, but physical inactivity was negatively associated (rc= -0.630). Discussion. Taking medications or maintaining tobacco consumption produces better LS than being ambivalent towards physical activity. Further research is needed to evaluate the efficacy of health interventions eliciting and promoting the behaviour change wheel based on capabilities, opportunities, and motivations. [less ▲]

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See detailWhy Should Judges Be independent? Reflections on Coke, Montesquieu and the French Tradition of Judicial Dependence
Heuschling, Luc UL

in Baranger, Denis; Ziegler, Katja; Bradley, Anthony W. (Eds.) Constitutionalism and the Role of Parliaments (2007)

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See detailWhy so few, and why so late? Green parties and the question of governmental participation
Dumont, Patrick UL; Bäck, Hanna

in EUROPEAN JOURNAL OF POLITICAL RESEARCH (2006), 45

Green parties have been represented in the parliaments of European Union countries since 1981, but it was not until recently that a few have entered national governments. Using a data set comprised of 51 ... [more ▼]

Green parties have been represented in the parliaments of European Union countries since 1981, but it was not until recently that a few have entered national governments. Using a data set comprised of 51 government formation opportunities (where the Greens were represented in parliament), the authors of this article show that the parties involved in these bargaining situations are more office-oriented than earlier studies had found. As Green parties are seen to be less office-seeking than other parties, this general tendency for office-seeking behaviour in government formation may partly account for the scarcity of Greens in government. Furthermore, a number of hypotheses derived from theories that account for the specific nature of Green parties in terms of their office-, policy- and vote-seeking orientations are tested. It is found that Greens participate in government when they have lost votes in at least one election, when the main party of the left identifies them as a clear electoral threat and when the policy distance between the Greens and either the formateur party or the main left party is small (the latter condition must be accompanied by a substantial proportion of seats for the Green party in parliament). As most of these simultaneous conditions only materialized recently, and in a few countries, it is argued that this analysis, which is the first comparative and multivariate test focused on this question, explains the scarcity and the delay of Green governmental participation. [less ▲]

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See detailWhy social studies of childhood? An introduction to the handbook
Honig, Michael-Sebastian UL; Qvortrup, Jens; Corsaro, William A.

in Qvortrup, Jens; Corsaro, William A.; Honig, Michael-Sebastian (Eds.) The Palgrave Handbook of Childhood Studies (2009)

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See detailWhy ‘what works’ still won’t work. From evidence-based education to value-based education.
Biesta, Gert UL

in Studies in Philosophy & Education (2010), 29(5), 491-503

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See detail„Why“ is the answer not the question: The role of perceived responsibility and control for emotional adaptation in cancer patient
Hoffmann, Martine UL; Lessing, J.; Ferring, Dieter UL

in Annual Conference of the Canadian Association of Psychosocial Oncology. Vancouver, Canada (2009)

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See detailWideband Identification of Power Network Parameters Using Pseudo-Random Binary Sequences on Power Inverters
Neshvad, Surena UL; Chatzinotas, Symeon UL; Sachau, Jürgen UL

in IEEE Transactions on Smart Grid (2015)

Due to the push for renewable energy in the last decades, European countries have witnessed an exponential growth of Distributed Generation (DG) on the Medium Voltage (MV) network. An increasingly large ... [more ▼]

Due to the push for renewable energy in the last decades, European countries have witnessed an exponential growth of Distributed Generation (DG) on the Medium Voltage (MV) network. An increasingly large portion of the electricity demand is fed in through the distribution grid, whose good health and operational status will be important for guaranteeing grid stability. In Luxembourg, the distribution network is sparsely monitored and controlled, thus instabilities arising due to line overvoltage or DG malfunctioning are not rapidly detected and resolved. This research discusses a novel and low infrastructure methodology for online monitoring of the distribution grid. Such a tool will be increasingly necessary in order to guarantee the stability, reliability and security of the power network, as a larger and larger portion of the energy demand will be satisfied by DG in future years. In this research, advanced system identification techniques utilized in communications, such as Pseudo-Random Binary Sequences, Successive Interference Cancellation are applied to estimate the transfer function of power network propagation paths. The developed method proposes an online monitoring tool that computes grid parameters in real time during operation, without extensive infrastructure addition, by utilizing the PWM based inverters on the grid for active system identification. [less ▲]

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See detailWider das Lernen. Die Wiedergewinnung einer Sprache für Erziehung im Zeitalter des Lernens.
Biesta, Gert UL

in Vierteljahresschrift für wissenschaftliche Pädagogik (2008), 84(2), 179-194

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See detailWidersprüchliche Erwartungen an die sozialpädagogische Profilbildung von Schulen
Wetzel, Konstanze; Braun, Karl-Heinz; Hoenig, Barbara UL

in Braches-Chyrek, Rita; Grünberg, Elke; Lenz, Gaby (Eds.) Soziale Arbeit und Schule. Im Spannungsfeld von Erziehung und Bildung (2012)

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See detailWiderstand im Gewand des Hyper-Konformismus : Die Fake-Strategien von ›The Yes Men‹
Doll, Martin UL

in Becker, Andreas; Doll, Martin; Wiemer, Serjoscha (Eds.) et al Mimikry : Gefährlicher Luxus zwischen Natur und Kultur (2008)

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See detailWie beeinflusst Statustransfer zwischen den Generationen das Wohlbefinden junger Erwachsener?
Samuel, Robin UL; Hupka-Brunner, Sandra; Stalder, Barbara E. et al

in Bergman, Manfred Max; Hupka-Brunner, Sandra; Meyer, Thomas (Eds.) et al Bildung – Arbeit – Erwachsenwerden (2012)

Bildungsabschlüsse sind die wichtigsten Faktoren für sozialen Status und beruflichen Erfolg in modernen Gesellschaften. Diese hängen, wie sozialer Status und Beruf, zu einem großen Teil von der sozialen ... [more ▼]

Bildungsabschlüsse sind die wichtigsten Faktoren für sozialen Status und beruflichen Erfolg in modernen Gesellschaften. Diese hängen, wie sozialer Status und Beruf, zu einem großen Teil von der sozialen Herkunft ab (Becker und Lauterbach 2004; Blau und Duncan 1967; Bourdieu und Passeron 1971; Breen und Goldthorpe 1997). [less ▲]

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See detailWie bilanzieren die europäischen Staaten in Luxemburg, Deutschland, Belgien, der Schweiz und in Frankreich? Ein Vergleich verschiedener nationaler Berechnungsvorschriften der Gesamtenergieeffizienz anhand von 9 klimatisierten Bürogebäuden und deren Realverbrauch
Render, Wolfgang; Maas, Stefan UL; Scholzen, Frank UL

in cci Zeitung - Führende Fachzeitung für die LüKK (Lüftung- Klima- Kältebranche) (2016)

Die EU-Mitgliedsstaaten sind gemäß den Richtlinien 2002/91/EG und 2010/31/EU verpflichtet, die Gesamtenergieeffizienz von Gebäuden abhängig von ihrer Art der Nutzung zu ermitteln und in einem Energiepass ... [more ▼]

Die EU-Mitgliedsstaaten sind gemäß den Richtlinien 2002/91/EG und 2010/31/EU verpflichtet, die Gesamtenergieeffizienz von Gebäuden abhängig von ihrer Art der Nutzung zu ermitteln und in einem Energiepass zu belegen. Die Ausgestaltung der Details des Berechnungsverfahrens und der Grenzwerte obliegt den Mitgliedsstaaten im Rahmen ihres nationalen Entscheidungsspielraums. Für 9 bestehende mittlere bis große Bürogebäude mit Teil- und Vollklimatisierung wurden die Berechnungen der Gesamtenergieeffizienz nach den jeweiligen Berechnungsmethoden durchgeführt und mit dem gemessenen realen Verbrauch verglichen. Die Abweichungen zwischen der berechneten Endenergie und dem tatsächlichen Verbrauch betragen zwar etliche 100% beim einzelnen Objekt, aber ca. 20 % im Mittel bei der Heizenergie. Bei der berechneten Endenergie des Stroms bestehen auch riesige Differenzen beim Einzelobjekt, aber im nationalen Vergleich im Mittel nur geringe Abweichungen zum Verbrauch, wobei der Stromverbrauch für die Büroausstattung geschätzt wurde. Die Abweichungen bei der Heizenergie und beim Strom im Mittel können als gut bezeichnet werden, wobei vor allem Belgien durch Über- und Unterschätzen beim Strom auffällt. Rund ¾ der verbrauchten Primärenergie ist auf den elektrische Energie zurück zu führen, wobei der Mittelwert von rund 400 kWh/m2 darauf hindeutet, dass die realen Gebäude noch weit vom europäischen Ziel der „Nearly Zero Energy Buildings (NZEB)“ entfernt sind. [less ▲]

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