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See detailUsing Passive Data Collection Methods to Learn Complex Mobility Patterns: An Exploratory Analysis
Toader, Bogdan UL; Cantelmo, Guido UL; Popescu, Mioara et al

Scientific Conference (in press)

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See detailNetworks and Governance of Local Food Systems. The case of Food Policy Councils
Reckinger, Rachel UL

Scientific Conference (2019, June 06)

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See detailExploration of Different School Value-Added Models in a Highly Heterogeneous Educational Context
Levy, Jessica UL; Brunner, Martin; Keller, Ulrich UL et al

Scientific Conference (2019, April)

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See detailNegotiating the past, present, and future: The Luxembourgish Jewish Museum Project as a Process of Contested memory and imagined futures
Badder, Anastasia UL; Bronec, Jakub UL

Scientific Conference (2019)

There is currently a project underway to establish a Jewish museum in Luxembourg in a restored synagogue just outside the main city center. As this project unfolds, it provides a clear view into the ... [more ▼]

There is currently a project underway to establish a Jewish museum in Luxembourg in a restored synagogue just outside the main city center. As this project unfolds, it provides a clear view into the contestations and negotiations over meaning, representation, Jewishness, and the past, present, and future visions of community that arise in the development of a museum. Ongoing debates over which objects will be included in the museum, how they will be defined, how they will link to other sites of Jewish heritage around the city (through tours, performances, reference, etc.), as well as a hesitancy by many to donate family objects all point to issues around the construction of collective memory, communal cultural heritage, and multiple narratives of the past and how these are erased in the process of producing heritage as a series of museum objects. These debates also highlight concerns about how the contemporary community – which is multilingual, multinational, and multi-denominational – will be represented; in other words, who will be included in representations of the community and how will the contemporary community be defined, if at all? Finally, ongoing discussions around what will be emphasized or downplayed indicate the contested nature, not only of the past, but also of collective visions of the future as constituted through representations of heritage. In particular, negotiations over how to represent the Holocaust reflect a desire by some to fit the museum into developing narratives of cosmopolitanism, interfaith, and intercultural relations and a drive by others to represent family narratives and engage in a project ‘against forgetting’ in order to ensure a particular kind of future. And so, using this project as a case study, I seek to draw attention to the ways in which the construction of a heritage regime is at once a negotiation over narratives of the past, shared present identities, and collective visions of the future and the discourses and social processes at work within these debates. [less ▲]

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See detailModelling Scale in Historiographical Data
Armaselu, Florentina UL

Scientific Conference (2018, December 09)

The project will investigate the meaning of scale in historical writings, and more precisely how scale is expressed through language in historical discourse. This question draws attention to the ... [more ▼]

The project will investigate the meaning of scale in historical writings, and more precisely how scale is expressed through language in historical discourse. This question draws attention to the conceptual and linguistic mechanisms at play in building historical knowledge, when the historian moves between different layers of analysis, narration or consulted sources, involving different degrees of generality. A small historiographical corpus, in which variations of scale are clearly present, will serve to develop the digital approach/tools/methodology. Depending on the findings of the project, an extension of the research to other types of corpora is envisaged. The paper presents a workflow and first experiments using topic modelling to analyse scale representation in historiographical data. Further experiments with more documents, other models and visualisation tools, as well as eventually creating a pipeline for semi-automatic restructuration of data as zoomable texts are also envisaged. [less ▲]

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See detailLSRepair: Live Search of Fix Ingredients for Automated Program Repair
Liu, Kui UL; Koyuncu, Anil UL; Kim, Kisub UL et al

Scientific Conference (2018, December 07)

Automated program repair (APR) has extensively been developed by leveraging search-based techniques, in which fix ingredients are explored and identified in different granularities from a specific search ... [more ▼]

Automated program repair (APR) has extensively been developed by leveraging search-based techniques, in which fix ingredients are explored and identified in different granularities from a specific search space. State-of-the approaches often find fix ingredients by using mutation operators or leveraging manually-crafted templates. We argue that the fix ingredients can be searched in an online mode, leveraging code search techniques to find potentially-fixed versions of buggy code fragments from which repair actions can be extracted. In this study, we present an APR tool, LSRepair, that automatically explores code repositories to search for fix ingredients at the method-level granularity with three strategies of similar code search. Our preliminary evaluation shows that code search can drive a faster fix process (some bugs are fixed in a few seconds). LSRepair helps repair 19 bugs from the Defects4J benchmark successfully. We expect our approach to open new directions for fixing multiple-lines bugs. [less ▲]

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See detailClosed-Form Solution for Computationally Efficient Symbol-Level Precoding
Krivochiza, Jevgenij UL; Merlano Duncan, Juan Carlos UL; Andrenacci, Stefano UL et al

Scientific Conference (2018, December)

We present a convex optimization based Symbol-Level Precoding (SLP) for sum power minimization and propose the low-latency closed-form algorithm to find a heuristic solution to the optimization problem ... [more ▼]

We present a convex optimization based Symbol-Level Precoding (SLP) for sum power minimization and propose the low-latency closed-form algorithm to find a heuristic solution to the optimization problem. The technique exploits constructive interference at the multi-user MIMO systems and minimizes the sum power of the transmitted precoded signal per each symbol slot. As a result, the received signals gain extra Signal-to-Noise Ratio (SNR), which leads to the improved data rate and energy efficiency. We benchmark the low-complexity algorithm for solving the optimization technique against the conventional Fast Non-Negative Least Squares algorithm (NNLS). The demonstrated design of the SLP technique combined with the proposed closed-form algorithm has low computational complexity and fast processing time, which is applicable in low-latency high-throughput satellite communication systems. [less ▲]

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See detailSequential Resource Distribution Technique for Multi-User OFDM-SWIPT based Cooperative Networks
Gautam, Sumit UL; Lagunas, Eva UL; Chatzinotas, Symeon UL et al

Scientific Conference (2018, December)

In this paper, we investigate resource allocation and relay selection in a dual-hop orthogonal frequency division multiplexing (OFDM)-based multi-user network where amplify-and-forward (AF) enabled relays ... [more ▼]

In this paper, we investigate resource allocation and relay selection in a dual-hop orthogonal frequency division multiplexing (OFDM)-based multi-user network where amplify-and-forward (AF) enabled relays facilitate simultaneous wireless information and power transfer (SWIPT) to the end-users. In this context, we address an optimization problem to maximize the end-users’ sum-rate subjected to transmit power and harvested energy constraints. Furthermore, the problem is formulated for both time-switching (TS) and power-splitting (PS) SWIPT schemes.We aim at optimizing the users’ SWIPT splitting factors as well as sub-carrier–destination assignment, sub-carrier pairing, and relay–destination coupling metrics. This kind of joint evaluation is combinatorial in nature with non-linear structure involving mixed-integer programming. In this vein, we propose a sub-optimal low complex sequential resource distribution (SRD) method to solve the aforementioned problem. The performance of the proposed SRD technique is compared with a semi-random resource allocation and relay selection approach. Simulation results reveal the benefits of the proposed design under several parameter values with various operating conditions to illustrate the efficiency of SWIPT schemes for the proposed techniques. [less ▲]

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See detailBiomechanical testing of osteotomy plates
Maas, Stefan UL; Diffo Kaze, Arnaud UL

Scientific Conference (2018, November 30)

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See detailIst Solfège gute Musik? Ein musikpädagogischer Ansatz zwischen Ästhetik und Selbstzweck
Sagrillo, Damien UL

Scientific Conference (2018, November 24)

Als Guido von Arezzo vor einem knappen Jahrtausend mit der Erfindung des Liniensystems aufwartete und Tonsilben aus den Angangsbuchstaben des Johannes-Hymnus ableitete, revolutionierte er damit die ... [more ▼]

Als Guido von Arezzo vor einem knappen Jahrtausend mit der Erfindung des Liniensystems aufwartete und Tonsilben aus den Angangsbuchstaben des Johannes-Hymnus ableitete, revolutionierte er damit die musikalische Bildung: Er ersetzte absurdes Auswendiglernen von (Kirchen-)Gesängen durch eine erlernbare, mechanische Lesetechnik. Er konnte wohl nicht ahnen, dass nach fast tausend Jahren „seine“ Methode immer noch Anwendung findet. In meinem Vortrag werde ich aufzeigen, wie Solfège, zum einen, durchaus musikästhetisch verortet ist, während, auf der anderen Seite, eben diese Methode der mechanischen Lesbarkeit, bar jedes musikästhetischen Anspruchs, den Musikpädagogen Kopfzerbrechen bereitet. [less ▲]

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See detailPréparer les futurs enseignants à l’utilisation stratégique des TICE: Une approche par projet
Busana, Gilbert UL; Reuter, Bob UL

Scientific Conference (2018, November 23)

Étant donné (1) le besoin d'enseignants désireux et capables de concevoir et de mettre en œuvre de façon fondée et réfléchie des pratiques techno-pédagogiques dans les écoles et (2) la rareté actuelle des ... [more ▼]

Étant donné (1) le besoin d'enseignants désireux et capables de concevoir et de mettre en œuvre de façon fondée et réfléchie des pratiques techno-pédagogiques dans les écoles et (2) la rareté actuelle des utilisations stratégiques des TIC dans les écoles au Luxembourg, le manque de compétences déclarées et la faible confiance des enseignants lorsqu'il s'agit d'enseigner avec les TIC (Reuter, Busana & Linckels, 2016), nous avons conçu, mis en œuvre et testé, dans la formation initiale des futurs enseignants de l’enseignement fondamental, une approche par projet pour le développement de compétences TICE. Nous demandons aux étudiants (1) d'explorer activement des problèmes pédagogiques réels, (2) de passer en revue les solutions pédagogiques existantes et les technologies potentiellement utiles, (3) de développer un scénario pédagogique original enrichi par les TIC et ayant une valeur ajoutée projetée selon le modèle SAMR (Puentedura, 2013), (4) de le mettre en œuvre dans un contexte scolaire réel, (5) de documenter, analyser et évaluer les activités d'apprentissage et d'enseignement mises en pratique, (6) de réfléchir sur base de connaissances scientifiques et de sagesses pédagogiques existantes et (7) de rapporter, par écrit et oralement, leurs expériences à un public authentique de pairs et de membres de la communauté scolaire. L'ensemble du processus a pour but d'engager les étudiants, de les faire travailler sur un projet dont ils sont les auteurs, de favoriser la collaboration, de mettre en place des apprentissages authentiques et orientés vers la pratique professionnelle et de leur permettre d'appliquer concrètement des concepts théoriques, comme la taxonomie des objectifs d'apprentissage de Bloom (Anderson & Krathwohl, 2001), la taxonomie des événements d'apprentissage et d'enseignement (Verpoorten, Poumay & Leclercq, 2008) et les stratégies d'intégration technologique (Roblyer & Doering, 2012). [less ▲]

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See detailThe non-restraint: a case-study into (trans)national knowledge circulation
Andersen, Eva UL

Scientific Conference (2018, November 22)

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See detailMoving beyond the Lecture: Towards Collaborative Inquiry-Based Learning with Big Questions
Reuter, Bob UL; Busana, Gilbert UL

Scientific Conference (2018, November 13)

We had been teaching a first-year course on “education in the digital age” as a lecture for a few years. However, we have observed, over the last years, that (1) many students failed to pass the exam and ... [more ▼]

We had been teaching a first-year course on “education in the digital age” as a lecture for a few years. However, we have observed, over the last years, that (1) many students failed to pass the exam and (2) that a lot of them, when in their 4th year, had forgotten most of these theoretical foundations. These considerations have driven us to rethink & redesign our teaching methods and how we assess students learning outcomes. Our pedagogical approach combines various learning & teaching methods that require students to actively and collaboratively construct meaningful knowledge and share it in a community of learners using an online digital portfolio. Overall, we are quite satisfied with our teaching approach but will have to improve our formative assessment practices and will have to set up a digital portfolio solution that is more reliable and leads to greater user satisfaction. [less ▲]

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See detailChildren's languaging and peer interactions in non-formal early childhood education in Luxembourg
Mortini, Simone UL

Scientific Conference (2018, November 09)

In Luxembourg children engage daily in multilingual practices outside early childhood institutions but often face monolingual practices within (Neumann, 2015). Despite research having debunked the need ... [more ▼]

In Luxembourg children engage daily in multilingual practices outside early childhood institutions but often face monolingual practices within (Neumann, 2015). Despite research having debunked the need for strict language separation for effective language learning, children are deprived from drawing on their complete linguistic repertoire (Neumann, 2015). In 2017 Luxembourg has opted for multilingual education in the early years. Formal and non-formal education settings are now required to offer the teaching of Luxembourgish, a familiarization with French and a valorisation of the children’s home languages. Whereas researchers have analysed inclusive language pedagogies (García, Johnson & Seltzer, 2017), studies seldomly examine the children’s active participation and peer interactions in early years settings implementing such multilingual pedagogies (Schwartz & Gorbatt, 2018). The present doctoral study is part of the research project MuLiPEC (Kirsch, 2016-2019) which aims at developing multilingual pedagogies through professional development in early childhood. Drawing on a sociocultural perspective, this paper focusses on two three-year-old children in two non-formal settings and investigates their languaging and interactions with peers and practitioners over a year. The data stem from 31 days of participant observation and videography of the children’s interactions with peers and practitioners and from eight interviews with the practitioners. The ongoing data analysis is based on thematic and interaction analysis. The preliminary findings, firstly, indicate that the children translanguaged, making use of their home language French, features of at least two other languages (e.g. German, English) and non-verbal communication (e.g. actions, gestures, pointing). Secondly, the children developed competences in Luxembourgish and learned new words in other languages from their peers and the practitioners. Finally, akin to Corsaro (2018), the children reproduced the practitioners’ language strategies (e.g. labelling, corrective feedback, translanguaging) during peer interactions and adapted their languaging to their interlocutors. The findings should contribute to research on dynamic multilingual practices and their impact on peer interactions in early childhood education. Corsaro, W.A. (2018). The Sociology of Childhood (5th edition). Los Angeles: SAGE García, O., Johnson, S., & Seltzer, K. (2017). The Translanguaging classroom. Leveraging student bilingualism for learning. Philadelphia: Caslon. Neumann, S. (2015). Lost in Translanguaging? Practices of Language Promotion in Luxemburgish Early Childhood Education. Global Education Review 2(1), 23–39. Schwartz, M., & Gorbatt, N. (2018). The Role of Language Experts in Novices’ Language Acquisition and Socialization. In M. Schwartz (ed.) Preschool Bilingual Education. Agency Between Children, Teachers, and Parents (pp. 343 – 356). Springer. [less ▲]

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See detailDimensional and Social Comparisons Effects on Domain-Specific Self-Concepts and Interests: A Study of Elementary School Children from Luxembourg Across Two Waves
van der Westhuizen, Lindie UL; Talic, Irma UL; Greiff, Samuel UL et al

Scientific Conference (2018, November 09)

Already at the beginning of elementary school, students start to develop self-beliefs and attitudes that reflect their motivation, thoughts, and feelings about a specific school domain. The internal ... [more ▼]

Already at the beginning of elementary school, students start to develop self-beliefs and attitudes that reflect their motivation, thoughts, and feelings about a specific school domain. The internal/external frame of reference (I/E) model (Marsh, 1986) encapsulates this phenomenon by explicating the formation of academic self-concept through a combination of social (i.e. comparing one’s achievement in one domain with the achievement of one’s peers in the same domain) and dimensional (i.e. comparing one’s achievement in one domain with one’s achievement in another domain) comparison processes. The recently established generalized internal/external frame of reference (GI/E) model (Möller, Müller-Kalthoff, Helm, Nagy, & Marsh, 2015) builds on the I/E model by extending it to the formation of other subject-specific academic self-beliefs and attitudes, such as interest and test anxiety. Despite the salience of the (G)I/E model in educational research, studies investigating the formation of self-beliefs and attitudes according to this model remains scarce among elementary school children. This study aims to contribute to the current literature by examining the associations between verbal and mathematics achievement, on the one hand, and corresponding domain-specific self-concepts and interests, on the other hand. A population of Luxembourgish elementary school students was assessed twice, two years apart (once in Grade 1 and once in Grade 3) as part of the Luxembourgish school monitoring system (EpStan, cohorts 2014 & 2016; epstan.lu). Using a domain-specific approach, students were assessed on math and verbal achievement as well as German- and math self-concept and interest. This culminated in a sample of N = 3606 elementary school children who participated in both waves. German- and math self-concepts and interests were self-reported whereas standardized achievement tests (see epstan.lu) were used as indicators of math and verbal (Luxembourgish for Grade 1 and German for Grade 3) achievement. Cross-lagged structural equation modelling was performed in Mplus 8 using WLSMV estimation for categorical variables. Overall, the results suggest strong support for the (G)I/E model for Grade 3, while only partial support was found for the (G)I/E model for Grade 1. More specifically, for both Grade 1 and Grade 3, achievement was positively related to self-concept and interest within the same domain. Negative relations between achievement and self-concept and interest across domains were found in Grade 3, but not in Grade 1. The findings are discussed within the context of theory and research on self-concept differentiation processes, dimensional comparison theory, and the multilingual Luxembourgish educational system. [less ▲]

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See detailLongitudinal development of students‘ competencies in Mathematics and German reading comprehension
Sonnleitner, Philipp UL; Krämer, Charlotte UL; Gamo, Sylvie UL et al

Scientific Conference (2018, November 09)

Im Rahmen des luxemburgischen Schulmonitorings werden Schlüsselkompetenzen der Schülerinnen und Schüler der luxemburgischen Regelschulen in regelmäßigen Abständen durch die so genannten Épreuves ... [more ▼]

Im Rahmen des luxemburgischen Schulmonitorings werden Schlüsselkompetenzen der Schülerinnen und Schüler der luxemburgischen Regelschulen in regelmäßigen Abständen durch die so genannten Épreuves Standardisées (ÉpStan) gemessen. Diese längsschnittliche Begleitung der Schülerinnen und Schüler birgt die einmalige Chance, neue Erklärungsansätze für ein (alt)bekanntes Problem des luxemburgischen Schulsystems zu finden: die großen Unterschiede der Bildungschancen von Schülerinnen und Schüler je nach Geschlecht, sprachlichem und sozioökonomischem Hintergrund. Der vorliegende Beitrag gibt nun einen ersten Einblick in die längsschnittliche Kompetenzentwicklung in den Bereichen Deutsch-Leseverstehen und Mathematik. Hierfür werden die Testergebnisse der untersuchten Schülerkohorte aus den ÉpStan-Kompetenztests 2010 in der 3.Schulstufe den Leistungen in der 9. Schulstufe im Jahre 2016 gegenübergestellt. Die Darstellung der Entwicklungsverläufe mittels Sankey-Flussdiagrammen, erlaubt ein schnelles und intuitives Verständnis, von welchem Kompetenzniveau die Schülerinnen und Schüler in der 3. Klasse starten und welches sie schließlich in der 9. Klasse erreichen. Der Effekt von nachgewiesenermaßen einflussreichen, demografischen (Hintergrund-) Merkmalen wie Geschlecht, sprachlichem Hintergrund und sozioökonomischem Status wird dabei gesondert analysiert. Beim Blick auf die generellen Entwicklungsverläufe in den Bereichen Deutsch-Leseverstehen und Mathematik fällt vor allem eine sehr hohe Stabilität der Kompetenzeinstufungen auf: Schülerinnen und Schüler der 3. Klasse, deren Leistungen auf dem (erwartungskonformen) Niveau Socle oder Niveau Avancé liegen, verfügen in der Regel auch 6 Jahre später über hohe Deutsch- bzw. Mathematikkompetenzen. Umgekehrt verbleibt die Mehrheit der Schülerinnen und Schüler mit anfänglich schwachen Leistungen auch später auf einem niedrigen Kompetenzniveau. Bezieht man nun die Teilergebnisse zum Sprachhintergrund mit ein, lässt sich ganz klar folgern, dass die Unterrichtssprache hierfür einen entscheidenden Faktor darstellt: Schülerinnen und Schüler, die Luxemburgisch oder Deutsch als Muttersprache angeben, können sowohl in Deutsch-Leseverstehen als auch in Mathematik eher ein hohes Niveau halten bzw. sich im Laufe ihrer Schulkarriere auf ein solches verbessern. Portugiesischsprachige bzw. frankophone Schülerinnen und Schüler, die im Allgemeinen ohnehin auf einem niedrigeren Kompetenzniveau starten, können sich nur teilweise deutlich verbessern, profitieren aber vom Wechsel der Unterrichtssprache im Secondaire. Die Analysen zeigen darüber hinaus, dass typische Geschlechtsunterschiede, die auf einen Vorteil für Mädchen beim Lesen und einen leichten Vorteil für Jungen in Mathematik hindeuten, schon anfangs der 3. Klasse bestehen, und über die folgenden 6 Jahre weitgehend stabil bleiben. Zusammenfassend bestätigen die Ergebnisse die bereits mehrfach aufgezeigten landestypischen Probleme, erlauben aber eine feinere Aufschlüsselung und zeitliche Verortung der Wechselwirkungen zwischen Unterrichtssprache, sprachlichem und sozioökonomischem Schülerhintergrund, und bilden so die Grundlage für effektivere Interventionen. [less ▲]

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See detailDeveloping and validating a short-form questionnaire for the assessment of seven conscientiousness facets in educational large-scale assessments
Franzen, Patrick UL; van der Westhuizen, Lindie UL; Greiff, Samuel UL et al

Scientific Conference (2018, November 09)

The influence of personality on academic outcomes has been demonstrated consistently in previous research. In particular, conscientiousness and its lower order facets generally show the strongest ... [more ▼]

The influence of personality on academic outcomes has been demonstrated consistently in previous research. In particular, conscientiousness and its lower order facets generally show the strongest predictive validity for academic success. MacCann et al. (2009) constructed a 68-item questionnaire for the comprehensive assessment of different conscientiousness facets in secondary education. However, such questionnaires are arguably too long for the use in large-scale educational assessments. Investigating the influence of conscientiousness facets within large-scale educational assessments is, nevertheless, crucial for advancing our knowledge of the differential influence of facets on various academic outcomes. Short and psychometrically sound questionnaires are thus required. Currently, no short and yet comprehensive questionnaire assessing the lower order facets of conscientiousness, that is suitable for large-scale educational assessments exists. Therefore, within the present investigation we develop a short-form instrument based upon the seven-factor version (59 items) of the questionnaire presented by MacCann et al. (2009), by using an exhaustive search algorithm and traditional item selection methods. Our sample consists of a large and representative dataset comprising all 9th grade students in Luxembourg from the Luxembourgish national school monitoring system (N = 6325; see epstan.lu), who answered French and German adaptations of the original 59-item questionnaire. We specified the exhaustive search algorithm to select the best possible combination of four items for each lower order facet, by considering goodness of fit criteria, factor saturation statistics, and measurement invariance between the German and French version. In addition, we used Mokken scale analysis and assessed the congruence of item wordings and theoretical definitions of each lower order facet to ensure content validity. We finally selected four to five items per scale based on our analyses. We found good fit statistics for all lower order facet scales (CFI >.95, RMSEA < 0.05), and acceptable to good factor saturation statistics for all but one of these scales (McDonalds ω > 0.7). On top of that, all scales show either scalar invariance, or partial scalar invariance between the German and French language version. The result of our investigation is a short and psychometrically sound instrument for the assessment of the lower order facets of conscientiousness. It is specifically tailored towards the unique context of the multilingual Luxembourgish educational system, and can be used in the upcoming Épstan cohorts. [less ▲]

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See detailReplicating and extending the GI/E model: Social and dimensional comparison effects of achievement on test anxiety in math, physics, German, and English
Talic, Irma UL; Franzen, Patrick UL; Greiff, Samuel UL et al

Scientific Conference (2018, November 09)

The internal/external frame of reference model (I/E model; Marsh, 1986) depicts the formation of academic self-concept by assuming an interplay of social and dimensional comparison processes within and ... [more ▼]

The internal/external frame of reference model (I/E model; Marsh, 1986) depicts the formation of academic self-concept by assuming an interplay of social and dimensional comparison processes within and across different domains. Associations between achievement and self-concept are expected to be positive within one given domain due to social comparisons (i.e., external frame of reference) and negative across different domains due to dimensional comparisons (i.e., internal frame of reference). The Generalized I/E model (GI/E model; Möller, Müller-Kalthoff, Helm, Nagy, & Marsh, 2015) allows for the inclusion of other outcome variables besides academic self-concept, for example, interest or motivation. The present research aimed at applying the GI/E model to the construct of test anxiety, thereby replicating and significantly extending some first supportive findings on the validity of the GI/E model with test anxiety (Arens, Becker, & Möller, 2017). To this end, we expanded the scope of the GI/E model with test anxiety for the first time to four domains; namely math, physics, German, and English. For this purpose, we drew on a sample of N = 305 9th and 10th graders attending the highest ability school track (i.e., Gymnasium) from six different secondary schools in four German federal states. Analyses were carried out using structural equation modelling in Mplus 8. We used school grades in the respective domains as achievement indicators. Test anxiety was assessed separately for each domain while simultaneously differentiating between two components of test anxiety; namely, worry and emotionality. Our results suggested negative within-domain relations between achievement and test anxiety in all four domains (i.e., higher grades were associated with less test anxiety). The pattern of results for the relations across domains was not as clear. Positive links between achievement and test anxiety across domains (i.e., higher grades in domain A were associated with higher test anxiety in domain B) were weak and could only be established for the association between German achievement and students’ worry in mathematics. These findings partially supported the assumptions made by the GI/E model. As such, we replicated preexisting findings and added novel insights to the GI/E model. Our results were discussed within the framework of self-concept theory and research as well as dimensional comparison theory. [less ▲]

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See detail'Analogue Renaissance': Strategies of Technostalgia with Kodak’s new Super 8 film camera
van der Heijden, Tim UL

Scientific Conference (2018, November 09)

“There are some moments that digital just can’t deliver, because it doesn’t have the incomparable depth and beauty of film. These moments inspired Kodak to design a new generation of film cameras.” Along ... [more ▼]

“There are some moments that digital just can’t deliver, because it doesn’t have the incomparable depth and beauty of film. These moments inspired Kodak to design a new generation of film cameras.” Along with this mission statement, Kodak announced the making of a new Super 8 film camera at the Consumer Electronics Show (CES) in January 2016. The announcement preceded the re-release of various other “retro” and “vintage” products in the following years, including Kodak’s iconic Ektachrome film stock. This paper critically investigates Kodak’s so-called “Analogue Renaissance”, the return of these analogue amateur film technologies that used to be widely popular among amateur film and home moviemakers in the 1970s. The re-releases not only fostered the imagination of numerous hobbyists around the world who were familiar with analogue filmmaking already, but also a new generation of users interested in film’s analogue aesthetic and material qualities. The paper analyses Kodak’s cross-generational attempt to remediate, revive and re-imagine the Super 8 film camera as a past media technology in particular. Drawing on the concept of “technostalgia”, the reminiscence of past media technologies in contemporary memory practices, it aims to further build on previous attempts to theorize the dynamic relations between the past and the present, the analogue and the digital, and the archival and the performative. While Kodak has been strategically framing the new Super 8 film camera under the label of the “Analogue Renaissance”, it will be shown that it not limits itself to remediating the design and analogue functionality of the device’s idiosyncratic equivalent. On the contrary, remarkably enough, the new Super 8 camera comes with several additional digital features, such as the recording of digital sound and a LCD display. The paper argues that this merging of the film camera’s original analogue features with digital ones makes Kodak’s new film camera a fundamental “hybrid” media technology, whose manufacturer’s attempt to update it to the present day by adding digital features entails more than just a way of enhancing user possibilities and experiences. While Kodak advertises its new device with a statement that aims to exaggerate the impossibilities of the digital, it will be argued that Kodak’s new Super 8 film camera requires a theoretical thinking that moves beyond the analogue-digital divide as well as previous conceptualizations of (tech)nostalgia. [less ▲]

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See detail(Dis)engaging in Language and Sciences Lessons: How do Primary School Students in Multilingual Luxembourg Communicate With Each Other?
Degano, Sarah UL

Scientific Conference (2018, November 09)

As the country with the highest percentage of immigration in Europe, Luxembourg has a very diverse school population. This doctoral project is part of the research project ‘CALIDIE’ that investigates how ... [more ▼]

As the country with the highest percentage of immigration in Europe, Luxembourg has a very diverse school population. This doctoral project is part of the research project ‘CALIDIE’ that investigates how multilingualism can be capitalized on. In Luxembourg, the teaching of Luxembourgish, German and French accounts for 40.5% of all curricular time. Assessment studies have shown that students of Portuguese, French and Slavic heritage underperform compared to Luxembourgish and German-speaking students in primary schools (MENJE, 2017). While studies in preschool, Year 1 and Year 2 classes show that some teachers begin to draw on children’s semiotic repertoires (Kirsch 2017), the present project targets Years 4 and 5. The focus lies on translanguaging practices. Translanguaging is the enactment of a person’s linguistic and non-linguistic resources. Research in bilingual and trilingual school contexts has shown that translanguaging can promote knowledge, understanding and academic success (García & Sylvan 2011). To help students learn, teachers need to encourage students to make use of their resources in a strategic and responsible way, whatever the status of the languages (García, Johnson & Seltzer 2017). In this paper, I examine the extent to which a fourth-grader of Slovenian language background deploys (or does not deploy) his linguistic repertoire while interacting with peers. Data are drawn from eighteen days of observation and video-recordings of the students’ language use in German, French and Science lessons from September 2017 to July 2018 in a state school in Eastern Luxembourg. The thematic analysis focuses on classroom interactions among students; the learning activities; the languages; and the purposes of their (in)flexible language use. Preliminary results show that peer interactions and child-led learning activities are scarce; the students communicate in the language of instruction; and translanguaging is used to (help) participate. The findings are tentative because data collection is on-going. [less ▲]

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See detailExemplarische Bildungsverläufe von Jugendlichen in den Erziehungshilfen und im Übergang
Göbel, Sabrina UL

Scientific Conference (2018, November 08)

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See detailResearching education in Luxembourg (symposium)
Fischbach, Antoine UL

Scientific Conference (2018, November 08)

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See detailChildren’s languaging and peer interactions in non-formal early childhood education in Luxembourg
Kirsch, Claudine UL; Aleksic, Gabrijela UL; Andersen, Katja Natalie UL

Scientific Conference (2018, November 08)

The need for multilingual pedagogies has been recognized and several multilingual programmes have been implemented in early childhood in Europe. In Luxembourg, where this study is based, laws were voted ... [more ▼]

The need for multilingual pedagogies has been recognized and several multilingual programmes have been implemented in early childhood in Europe. In Luxembourg, where this study is based, laws were voted in 2017 that require early years practitioners to develop Luxembourgish, familiarize children with French, and value home languages. To develop inclusive multilingual practices, the authors of this presentation developed a 30-hour professional development programme (thereafter PD) which was long-term, collaborative, inquiry-based, performance-oriented, and included coaching. The participants carried out and video-record activities based on books and rhymes in several languages, reflected on these, and received feedback. This case-study examines the influence of the PD on the understanding of language learning and practices of two teachers and five carers working in schools and crèches. The data stem from a questionnaire completed three times; twelve interviews; six observations of the training; 30 video-recorded activities; ten coaching reports, and emails. The methods of data analysis comprise paired samples t-test, correlational analysis, content analysis and triangulation. The findings show a positive effect of the PD on understanding of language learning and practices. The teachers and some carers developed a better understanding of social constructivist learning theories which influenced their practices that began to focus on interactions between adults and children, and amongst children. The other carers understood the relevance of dialogue and carried out activities in several languages but their overall practice did not change. The findings confirm that collaborative, inquiry-based PD can be transformative (Gaikhorst et al., 2017; Prenger et al., 2017) and change perspectives and practices to some extent (Buschmann & Sachse, 2018). In addition, they add to the dearth of literature on PD on multilingual education in early years (Egert, 2015). Buschmann, A., & Sachse, S. (2018). Heidelberg interaction training for language promotion in early childhood settings. European Journal of Education, 53(1), 66-78. Egert, F. (2015). Meta-analysis on the impact of in-service professional development programs for preschool teachers on quality ratings and child outcomes. Gaikhorst, L., Beishuizen, J. J. J., Zijlstra, B. J. H., & Volman, M. L. L. (2017) The sustainability of a teacher professional development programme for beginning urban teachers, Cambridge Journal of Education, 47(1), 135-154. Prenger, R., Poortman, C. L., & Handelzalts, A. (2017). Factors influencing teachers’ professional development in networked professional learning communities. Teaching and Teacher Education, 68(1), 77-90. [less ▲]

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See detailIt's not only the game, it's also the player: The role of player personality in violent video game preference
Holl, Elisabeth UL; Melzer, André UL

Scientific Conference (2018, November 03)

In contrast to the effects of game content, violent video games have less been researched with regard to players' preferences for these games, and whether these preferences are related to certain ... [more ▼]

In contrast to the effects of game content, violent video games have less been researched with regard to players' preferences for these games, and whether these preferences are related to certain personality characteristics. Using a novel brief and uni-dimensional self-report measure, the present research examined the role of personality factors and preferences for violent video games. A scale of five items was administrated in two studies that involved 292 and 180 respondents, respectively. The same scale with two additional items was presented to 190 respondents in the third study, which included measures revealed by prior research to be relevant for understanding violent video game motivation and preference. More specifically, we measured participants' trait aggression, the Dark Triad traits of psychopathy, Machiavellianism, and narcissism. To test for the scale's discriminant validity, trait empathy was also included. In line with other findings in the literature (e.g., Greitemeyer, 2015), results obtained with the self-report measure indicated that players with a propensity for games featuring violent themes show callous, impulsive and exploitative attributes, whereas narcissism was not a significant predictor. However, and as already suggested by some authors (Hartmann, Möller, & Krause, 2014), a lack of empathy was found to predict violent game preferences. The present findings are important with regard to future research on video games that should focus more on the players and their gaming motivation than on the effects of playing alone. [less ▲]

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See detailAußerschulisches Lesen und Lesekompetenz Zum Zusammenhang zwischen den Deutsch- und Französisch- Lesekompetenzen von Neuntklässlerinnen und Neuntklässlern und ihren außerschulischen Lesegewohnheiten in Luxemburg.
Reichert, Monique UL; Krämer, Charlotte UL; Rivas, Salvador UL et al

Scientific Conference (2018, November)

In Luxemburg erreichen viele Jugendliche ein gutes Lesekompetenzniveau nicht nur in einer, sondern gleich in zwei Sprachen. Allerdings wird wiederholt darauf hingewiesen, dass die Lesekompetenzen in ... [more ▼]

In Luxemburg erreichen viele Jugendliche ein gutes Lesekompetenzniveau nicht nur in einer, sondern gleich in zwei Sprachen. Allerdings wird wiederholt darauf hingewiesen, dass die Lesekompetenzen in Luxemburg stark mit dem familiären Hintergrund der Schülerinnen und Schüler zusammenhängen. Die vorliegende Studie soll jedoch über die Darstellung der Zusammenhänge zwischen den Deutsch- und Französisch-Lesekompetenzen und Einflussfaktoren wie sozio-ökonomischem Hintergrund, Migrationsstatus und Muttersprache hinausgehen. In der Tat stellt sich die Frage, ob es Faktoren gibt, die sich positiv auf das Lesekompetenzniveau der Schülerinnen und Schüler auswirken und auf die sie – anders als bei diesen mittlerweile gut belegten Faktoren – selbst Einfluss nehmen können? Das Leseverhalten Jugendlicher stellt hierfür einen naheliegenden Ansatzpunkt dar. Somit wurden die Schülerinnen und Schüler während der ÉpStan 2016 nicht nur zu ihrem familiären, schulischen und persönlichen Hintergrund befragt, sondern erstmals auch zu ihrem außerschulischen Leseverhalten. Hierbei wurde erfasst, wie häufig sie in ihrer Freizeit Texte unterschiedlicher Art (z. B. Erzählungen, Sachtexte, Zeitungsartikel, Foreneinträge oder Emails) lesen, und in welchen Sprachen sie dies tun. Mittels verschiedener Regressionsanalysen wurde der familiäre Hintergrund der Jugendlichen, ihr Leseverhalten, sowie ihr Lesekompetenzniveau im Deutschen und Französischen zueinander in Bezug gesetzt. Die aus diesen Analysen hervorgehenden Ergebnisse belegen eindrücklich, dass neben dem familiären Hintergrund auch die Lesehäufigkeit und die Sprache, in der die Schülerinnen und Schüler üblicherweise lesen, von Bedeutung für das erreichte Lesekompetenzniveau sind. Darüber hinaus haben insbesondere die Textsorten, mit denen sich die Jugendlichen in ihrer Freizeit auseinandersetzen, entscheidenden Einfluss auf ihre Deutsch- und ihre Französisch-Lesekompetenz. Insbesondere die Häufigkeit, mit der Jugendliche angeben, narrative Texte (wie Geschichten, Romane oder Erzählungen) zu lesen, steht deutlich in positivem Zusammenhang mit ihrer Lesekompetenz in beiden Sprachen. Der Vortrag schließt mit einer Diskussion bezüglich der außerordentlich hohen Attraktivität von digitalen Textsorten bei Kindern und Jugendlichen, und den Möglichkeiten, diese Vielfalt an primär kommunikativ bzw. interaktiv ausgerichteten Lesematerialien als lebensnahe, pädagogische „Sprungbretter“ zu nutzen, mit deren Hilfe zukünftige Leserinnen und Leser an zunehmend komplexere Texte herangeführt werden könnten. [less ▲]

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See detailWie wirken sich Klassenwiederholungen in der Sekundarstufe 1 auf spätere Schulnoten aus? Eine Längsschnittanalyse
Klapproth, Florian; Fischbach, Antoine UL; Keller, Ulrich UL et al

Scientific Conference (2018, November)

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See detailOptimal dispatching of electric and hybrid buses subject to scheduling and charging constraints
Rinaldi, Marco UL; Parisi, Federico; Laskaris, Georgios UL et al

Scientific Conference (2018, November)

We consider the problem of optimally determining the sequence of electric and hybrid buses departing from a multi-line bus terminal, considering both service constraints (schedule adherence) and energy ... [more ▼]

We consider the problem of optimally determining the sequence of electric and hybrid buses departing from a multi-line bus terminal, considering both service constraints (schedule adherence) and energy constraints (electric bus charging status, bus recharging scheduling in capacitated facilities). The problem is formulated as a Mixed Integer Linear Program, with the objective of minimizing the total operational cost for the bus lines in question. System dynamics are captured by practical sets of constraints, ranging from scheduling adherence to discharge- recharge dynamics. Individual operational costs at the bus level and at the trip level are fully parametrized, allowing for extensive sensitivity analysis. We investigate a real-life case study based on the city of Luxembourg, where two charging stations have been installed in the central station’s bus terminal. Experimental results show that, while full electrification is indeed possible, the required fleet size depends strongly on the given line(s) timetable. [less ▲]

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See detailPolicy and research priorities of the World Young Leaders in Dementia (WYLD) network
Leist, Anja UL

Scientific Conference (2018, October 30)

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See detailMicromagnetic simulations for understanding magnetic SANS
Michels, Andreas UL

Scientific Conference (2018, October 29)

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See detailTwitter data as primary sources for historians: a critical approach
Clavert, Frédéric UL; Papastamkou, Sofia

Scientific Conference (2018, October 25)

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See detailDoing Digital Hermeneutics in an Interdisciplinary Setting
van der Heijden, Tim UL

Scientific Conference (2018, October 25)

This contribution examines the conference theme from the perspective of the Doctoral Training Unit (DTU) in ‘Digital History and Hermeneutics’, a four-year interdisciplinary research and training program ... [more ▼]

This contribution examines the conference theme from the perspective of the Doctoral Training Unit (DTU) in ‘Digital History and Hermeneutics’, a four-year interdisciplinary research and training program funded by the Luxembourg National Research Fund (FNR) and hosted by the Centre for Contemporary and Digital History (C2DH) at the University of Luxembourg. The DTU is designed as an experimental platform for collaboration, in which thirteen doctoral candidates with different disciplinary backgrounds – from history, linguistics and philosophy to computer and information science – study and reflect on the epistemological and methodological implications of the ‘digital turn’ on historical research. The presentation takes a look back at the project’s first year, in which the doctoral candidates were introduced to various skills and methods in digital humanities, including text mining, digital source criticism, database structures, data visualization, GIS analysis, tool criticism and algorithmic critique. Based on experiences by the doctoral students themselves as reflected in semi-structured interviews, as well as drawing upon studies in interdisciplinarity, digital humanities, and the role of space(s) in scientific collaborations, the possibilities and challenges will be explored of doing digital history and hermeneutics in an interdisciplinary setting. [less ▲]

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See detailThe long and winding road to inclusion in Higher Education
Limbach-Reich, Arthur UL

Scientific Conference (2018, October 18)

Detailed reference viewed: 18 (4 UL)
See detailEin Atlas der Stadtgeschichte Luxemburgs - digital und interaktiv. Ein Werkstattbericht
Uhrmacher, Martin UL; Kass, Steve UL

Scientific Conference (2018, October 18)

Seit 2016 widmet sich ein Forschungsprojekt der Universität, in Zusammenarbeit mit der Stadt Luxemburg, der Erstellung eines historischen Atlas. Dieser wird die städtische Entwicklung seit Beginn des 19 ... [more ▼]

Seit 2016 widmet sich ein Forschungsprojekt der Universität, in Zusammenarbeit mit der Stadt Luxemburg, der Erstellung eines historischen Atlas. Dieser wird die städtische Entwicklung seit Beginn des 19. Jahrhunderts in Form von digitalen und interaktiven Karten im Internet darstellen. Fünf Zeitschnitte sind vorgesehen, um die tiefgreifenden Wandlungsprozesse Luxemburgs zu analysieren und zugleich auch spannend und anschaulich zu präsentieren: Von der Festungsstadt, die das militärische Korsett erst nach 1867 ablegen konnte, über eine moderne europäischen Hauptstadt des frühen 20. Jahrhunderts bis hin zu einem der Hauptverwaltungssitze der EU und einem internationalen Finanzzentrum. Ein Jahr vor der offiziellen Veröffentlichung des Atlas werden erste Ergebnisse präsentiert. Dies ermöglicht einen Einblick in die historische Forschungsarbeit sowie in die digitale Aufbereitung alter Karten für die Publikation im Internet. [less ▲]

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See detailEntwicklung der zweiten Generation des Eurocodes 4 - Neuerungen in der Bemessung für Verbundtragwerke aus Stahl und Beton
Schäfer, Markus UL; Mensinger, Martin

Scientific Conference (2018, October 11)

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See detailInsights into the performance and configuration of TCP in Automotive Ethernet Networks
Navet, Nicolas UL; Migge, Jörn

Scientific Conference (2018, October 10)

TCP has become an integral part of the Autosar communication stack located immediately below the Socket Adaptor layer. There are numerous use-cases for TCP in automotive networks. First TCP can be ... [more ▼]

TCP has become an integral part of the Autosar communication stack located immediately below the Socket Adaptor layer. There are numerous use-cases for TCP in automotive networks. First TCP can be leveraged on by many higher-level protocols be it for diagnostic (DoIp), calibration protocols (XCP), service-oriented communications (SomeIP), FTP and HTTP transfer, or more specialized tasks like protocols for the control of electric vehicle charging. In addition, communication through standard TCP sockets simplifies the development and re-use of applications requiring reliable transmissions within the vehicle or with external end-systems (car2x, cloud-based services).If previous works focused on throughput as performance criterion, we here also consider the communication latencies and memory usage in the end-systems and switches. The first question explored by simulation is to quantify the importance of TCP configuration choices in the latencies that can be achieved with TCP. In particular, it is shown that turning off Nagle's algorithm in transmission and delayed acknowledgment in reception as Autosar is very beneficial in terms of latencies but at the expense of throughput. We then extend the experiments to integrate the interactions between the Socket Adaptor and TCP layers. Finally, we study the performance of TCP streams as part of a complete automotive TSN case-study made up of control traffic, audio/video streams and best-effort traffic to evaluate the impact of higher priority traffic classes on TCP streams throughput and delays. The contribution of this work is twofold. First, we draw up a panorama of the TCP features and configuration options available in Autosar. Second, through experiments on models increasingly close to an implementation, we provide quantified insights in what we can expect from TCP in terms of latencies and throughput with the different configuration options available to us. [less ▲]

Detailed reference viewed: 11 (0 UL)
See detailDoes Born-Digital Heritage turn Historians into Digital Historians?
Schafer, Valerie UL

Scientific Conference (2018, October 10)

On three levels within digital history - the use of (1) digital sources, (2) digital tools (3) digital narratives, this presentation aims to demonstrate how the practice of born-digital heritage opens new ... [more ▼]

On three levels within digital history - the use of (1) digital sources, (2) digital tools (3) digital narratives, this presentation aims to demonstrate how the practice of born-digital heritage opens new possibilities but also issues for historians. [less ▲]

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See detailOral History and Linguistic Analysis. A Study in Digital and Contemporary European History
Armaselu, Florentina UL; Danescu, Elena UL; Klein, Francois UL

Scientific Conference (2018, October 09)

The article presents a workflow for combining oral history and language technology, and for evaluating this combination in the context of European contemporary history research and teaching. Two ... [more ▼]

The article presents a workflow for combining oral history and language technology, and for evaluating this combination in the context of European contemporary history research and teaching. Two experiments are devised to analyse how interdisciplinary connections between history and linguistics are built and evaluated within a digital framework. The longer term objective of this type of enquiry is to draw an “inventory” of strengths and weaknesses of language technology applied to the study of history. [less ▲]

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See detail(Dis-)Continuities and Disruptions in Young People’s Transitions out of Residential and Foster Care
Göbel, Sabrina UL

Scientific Conference (2018, October 05)

The project “TransCare. Young People's Transitions out of Residential and Foster Care” of the University of Luxembourg focuses on researching the achievement of agency in constellations of transitions ... [more ▼]

The project “TransCare. Young People's Transitions out of Residential and Foster Care” of the University of Luxembourg focuses on researching the achievement of agency in constellations of transitions. One part of the project sheds a light on former care leaver’s perspectives on their transition processes out of institutional care settings. Therefore, it looks at the experiences of young people themselves.The retrospective and biographical interviews with people who had left the care system, three to seven years ago, give us the opportunity to reconstruct different forms and patterns of transition. On closer inspection, the analysis of the interviews reveals many disruptions, discontinuities, turning points and overlays in the trajectories of the young people already within the care system. There are multiple breaks that influence transitions in other systems, e.g. in the system of education. This leads to various challenges and uncertainties that respondents face. Moreover, in phases of transition specific constructions and changes of affiliation/belongings appear to be handled by the young people. The biographical approach shows in which dimensions young people positioning themselves towards their own person and the institutional setting. It also illustrates in which ways the former care leavers experience themselves in various ways as agentic subjects in their transitions and which conditions and resources play a role in this process of leaving an institutional organized setting. By contrasting the interviews, the reconstructive analysis reveals the relevance of belongings and social relations in leaving care processes. It is asking “how, in a context of increasingly fluid, unstable and mobile lives, young people build meaning through their connections with people and places over time” (Cuervo & Wyn 2017, p. 220) and how different ways and forms of agency are achieved during transition processes. [less ▲]

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See detailHardware Demonstration of Precoded Communications in Multi-Beam UHTS Systems
Merlano Duncan, Juan Carlos UL; Krivochiza, Jevgenij UL; Andrenacci, Stefano UL et al

Scientific Conference (2018, October)

In this paper, we present a hardware test-bed to demonstrate closed-loop precoded communications for interference mitigation in the forward link of the multi-beam ultra-high throughput satellite systems ... [more ▼]

In this paper, we present a hardware test-bed to demonstrate closed-loop precoded communications for interference mitigation in the forward link of the multi-beam ultra-high throughput satellite systems. The hardware demonstrator is a full-chain closed-loop communication system with a multi-beam DVB-S2X compliant gateway, a satellite payload and MIMO channel emulator and a set of DVB-S2X user terminals with real-time CSI estimation and feedback. We experimentally show the feasibility of Precoding implementation in satellite communications based on the superframe structure DVB-S2X standard. Using the test-bed we have a possibility to run real-time precoded DVB-S2X communication and benchmark its performance under realistic environment. The hardware demonstrator is suitable to perform realistic benchmarks of Block- and Symbol-level Precoding techniques for multicast and unicast user scheduling scenarios. [less ▲]

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See detailStatic load deflection experiment on a beam for damage detection using the Deformation Area Difference Method
Erdenebat, Dolgion UL; Waldmann, Danièle UL; Teferle, Felix Norman UL

Scientific Conference (2018, October)

A reliable and safety infrastructure for both transport and traffic is becoming increasingly important today. The condition assessment of bridges remains difficult and new methods must be found to provide ... [more ▼]

A reliable and safety infrastructure for both transport and traffic is becoming increasingly important today. The condition assessment of bridges remains difficult and new methods must be found to provide reliable information. A meaningful in-situ assessment of bridges requires very detailed investigations which cannot be guaranteed by commonly used methods. It is known that the structural response to external loading is influenced by local damages. However, the detection of local damage depends on many factors such as environmental effects (e.g. temperature), construction layer (e.g. asphalt) and accuracy of the structural response measurement. Within the paper, a new so-called Deformation Area Difference (DAD) Method is presented. The DAD method is based on a load deflection experiment and does not require a reference measurement of initial condition. Therefore, the DAD method can be applied on existing bridges. Moreover, the DAD method uses the most modern technologies such as high precision measurement techniques and attempts to combine digital photogrammetry with drone applications. The DAD method uses information given in the curvature course from a theoretical model of the structure and compares it to real measurements. The paper shows results from a laboratory load-deflection experiment with a steel beam which has been gradually damaged at distinct positions. The load size is chosen so that the maximum deflection does not exceed the serviceability limit state. With the data obtained by the laboratory experiment, the damage degree, which can still be detected by the DAD method, is described. Furthermore, the influence of measurement accuracy on damage detection is discussed. [less ▲]

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See detailEfficient 5G Edge Caching Over Satellite
Vu, Thang Xuan UL; Maturo, Nicola UL; Vupalla, Satyaranayana et al

Scientific Conference (2018, October)

The fifth generation (5G) wireless networks have to deal with the high data rate and stringent latency requirements due to the massive invasion of connected devices and data-hungry applications. Edge ... [more ▼]

The fifth generation (5G) wireless networks have to deal with the high data rate and stringent latency requirements due to the massive invasion of connected devices and data-hungry applications. Edge caching is a promising technique to overcome these challenges by prefetching the content closer to the end users at the edge node's local storage. In this paper, we analyze the performance of edge caching 5G networks with the aid of satellite communication systems. Firstly, we investigate the satellite-aided edge caching systems in two promising use cases: a) in dense urban areas, and b) in sparsely populated regions, e.g., rural areas. Secondly, we study the effectiveness of satellite systems via the proposed satellite-aided caching algorithm, which can be used in three configurations: i) mono-beam satellite, ii) multi-beam satellite, and iii) hybrid mode. Thirdly, the proposed caching algorithm is evaluated by using both empirical Zipf-distribution data and the more realistic Movielens dataset. [less ▲]

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See detailDie Zeit der Pfandherrschaften (1388-1437). Luxemburg unter fremder Herrschaft?
Dönges, Christa Annette UL

Scientific Conference (2018, September 28)

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See detailDie Erfindung der Grenze. Zur Konstruktion von Herrschaftsgebieten auf Regionalkarten des 16. Jahrhunderts im Westen des Reiches.
Uhrmacher, Martin UL

Scientific Conference (2018, September 28)

Im Spätmittelalter war das Reich durch Prozesse der Territorialisierung geprägt. Vor allem in den größeren Landesherrschaften wurde versucht, der Zersplitterung von Rechten und Besitzungen ... [more ▼]

Im Spätmittelalter war das Reich durch Prozesse der Territorialisierung geprägt. Vor allem in den größeren Landesherrschaften wurde versucht, der Zersplitterung von Rechten und Besitzungen entgegenzuwirken und Herrschaft zu verdichten. Im Westen des Reiches blieb man jedoch auf dem Weg zum Territorialstaat zumeist noch weit von einer flächigen Durchsetzung von Herrschaft entfernt. Die territorialen Verhältnisse lassen sich häufig als Gemengelage aus sich überlagernden Herrschaftsrechten, Hochgerichtsbezirken, Gemeinherrschaften, umstrittenen Gebieten oder anderen Abhängigkeiten beschreiben. Eine kartographische Erfassung dieser komplexen und mehrdimensionalen räumlichen Strukturen war mit den Mitteln der damaligen Zeit nicht möglich. Der Aufschwung einer zunehmend wissenschaftlich geprägten Kartographie ab der Mitte des 15. Jahrhunderts erlaubte es den Landesherren, kartographischer Darstellungen als Instrumente von Macht und Herrschaft zu nutzen: einerseits als Grundlage für die politische und wirtschaftliche Entwicklung des Territoriums, andererseits als Medium zur Verbreitung territorialer Ansprüche und zur Inszenierung von Herrschaft. Aus diesem Grund wurden einige der bekanntesten zeitgenössischen Kartographen mit der räumlichen Darstellung einzelner Fürstentümer beauftragt, bspw. Martin Waldseemüller durch Herzog René II. von Lothringen. Diese Aufgaben stellten die Kartographen vor große Probleme, denn noch gab es keine geeigneten Mittel, mit denen die politischen und territorialen Verhältnisse im Kartenbild auch nur annähernd widergegeben werden konnten. Eine Analyse ausgewählter Karten zeigt, welche verschiedenen Strategien angewandt wurden, um den fragmentarischen Besitz der Auftraggeber in seiner Gesamtheit als geschlossenes Herrschaftsgebiet erst zu konstruieren. Diese Experimentierphase endete Mitte des 16. Jahrhunderts mit der Etablierung von Grenzen in Form von Linien als allgemein gültiger Konvention, obwohl Territorialgrenzen im Sinne einer umfassenden Scheidelinie zwischen zwei Territorien in dieser Zeit nicht existierten. Der Vortrag widmet sich einer Fragestellung, die in Folge des spatial turn zwar wieder verstärkt in den geschichtswissenschaftlichen Fokus gelangte, aber in vieler Hinsicht noch nicht gründlich genug aufgearbeitet ist. Es gilt, historische Karten als vielschichtige, Schrift und Bild vereinende Wissensträger verstärkt auf Ihre Funktion bei der Ausbildung von politischen Räumen und Einheiten in den Blick zu nehmen. Denn sie müssen stets als bewusste Konstruktionen und keinesfalls als Versuch eines - gemessen an den jeweiligen technischen Möglichkeiten - quasi photographischen Abbildes der Realität verstanden und interpretiert werden. Die mit den Karten vermittelten und durch deren Druck auch weit verbreiteten Inszenierungen von geschlossenen Territorialstaaten erwiesen sich zudem als sehr wirkmächtig und prägend, teilweise bis zum Ende des Alten Reiches. Den zugrundeliegenden Strukturen und Prozessen wird im Rahmen des Vortrags besondere Aufmerksamkeit geschenkt. [less ▲]

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See detailMultilingualism in forced migration research: insights from an ethnographic study in Luxembourg
Kalocsanyiova, Erika UL

Scientific Conference (2018, September 27)

This paper outlines some methodological considerations for researching integration trajectories in multilingual societies. It draws on a linguistic ethnographic study undertaken in Luxembourg. It ... [more ▼]

This paper outlines some methodological considerations for researching integration trajectories in multilingual societies. It draws on a linguistic ethnographic study undertaken in Luxembourg. It discusses ways of accommodating the participants’ (and my own) multilingual but distinct language competences. I reflect upon how my positionality as a multilingual researcher became part of the research process, shaping both the research design and the relationships I had with the informants. Multilingual research practices can play a fundamental role in empowering participants and privileging their voices in migration-related studies. This paper outlines some of the benefits/complexities that can arise if both participants and researchers draw on their old and newly acquired language resources. In this connection, I will argue that narrative analysis allows a refined understanding of foreign- and cross-language exchanges, which in turn helps to uncover the many ways in which linguistic integration can be understood, practiced and experienced. Narratives also proved to be an excellent tool for exploring multiple and shifting ideological stances in (meta)discourses surrounding language, identity and societal participation in the context of this research. [less ▲]

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See detailRadial urban forms in Europe
Caruso, Geoffrey UL

Scientific Conference (2018, September 27)

Detailed reference viewed: 14 (1 UL)
See detailMagnetic neutron scattering on nanomagnets
Michels, Andreas UL

Scientific Conference (2018, September 26)

Detailed reference viewed: 8 (1 UL)
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See detailSOFTENING AND MELTING MODELING OF IRON ORE PARTICLES USING A CFD-DEM COUPLING METHOD
Baniasadi, Mehdi UL; Peters, Bernhard UL

Scientific Conference (2018, September 25)

The iron-bearing particles start softening and melting because of the weight of burden above and the high temperature in the middle of the blast furnace so-called cohesive zone. In this region, as ... [more ▼]

The iron-bearing particles start softening and melting because of the weight of burden above and the high temperature in the middle of the blast furnace so-called cohesive zone. In this region, as particles are softened, the void space between particles decreases. As the temperature increases further, the softened particles start melting and generate two different liquids: molten iron and slag. Then the generated liquids trickle down to the lower part of the blast furnace. The softening and melting process forms the impermeable ferrous layers forcing gas to flow horizontally through the permeable coke windows. These phenomena have a big effect on the operation of the blast furnace, and since it is not possible to interrupt the blast furnace to investigate details of the phenomena occurring inside, the numerical simulation becomes more practical. In this contribution, the eXtended Discrete Element Method (XDEM) as an advanced numerical tool based on the discrete-continuous framework, is used. Within this model, the gas and liquid phases are described by computational fluid dynamics (CFD) and the soft-sphere discrete element approach (DEM) is used for the coke and iron ore particles. Continuous phases are coupled to the discrete entities through mass, momentum, and energy exchange. Moreover, the internal temperature distribution of the particles is described. The particle’s deformation, temperature, melting, and shrinking along with the saturation of molten iron and slag are examined using the XDEM method. [less ▲]

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See detailTell Your Town – Sprache lernen, Integration fördern, Städte erkunden und entdecken
Reuter, Bob UL; Haberkorn, Marcus

Scientific Conference (2018, September 20)

Wie können ansässige und neu zugezogene Schülerinnen und Schülern in Rheinland-Pfalz und Luxemburg besser in ihren Regionen integriert werden, dabei ihre sprachlichen Fähigkeiten entwickeln und die ... [more ▼]

Wie können ansässige und neu zugezogene Schülerinnen und Schülern in Rheinland-Pfalz und Luxemburg besser in ihren Regionen integriert werden, dabei ihre sprachlichen Fähigkeiten entwickeln und die erforderliche Medienkompetenz erlernen? Diesen Fragen hat sich ein grenzüberschreitendes bilaterales Entwicklungs- und Forschungsprojekt gewidmet, wobei ein „Partizipativer Design“ Ansatz (Danielsson & Wiberg, 2006) angewandt wurde. Unter der Leitung eines Teams der Hochschule Trier wurde in Zusammenarbeit mit SchülerInnen und LehrerInnen der Escher Brill Schule und der Trierer Kurfürst-Balduin-Realschule sowie einem Team der Universität Luxemburg, während des Schuljahres 2016/2017, die mobile App „Tell Your Town" entwickelt. Ziel war es erfundene Geschichten an echten Schauplätzen in Trier und Esch auf Deutsch, Französisch, Englisch und Luxemburgisch in spielerischer Form zu erzählen. Die Geschichten, Schauplätze und Routen wurden in Design Workshops partizipativ erarbeitet. Ein Team an der Hochschule Trier setzte die App anschließend um und ein Team der Universität Luxemburg dokumentierte, analysierte und evaluierte die Benutzung der App durch die SchülerInnen in Feldversuchen in Trier und in Esch, mit Hilfe teilnehmender Beobachtungen, Videographie und Befragungen von SchülerInnen und LehrerInnen, um technische und pädagogische Rückmeldungen an die EntwicklerInnen und LehrerInnen zu geben. Bei diesem Projekt ist eine frei verfügbare App entstanden, welche die Benutzer dazu einlädt eine der beiden Städte „per pedes“ zu entdecken und dabei noch so einiges über die Geschichte der Stadt zu erfahren, was ihnen durch einen fiktionalen Reiseführer in interaktiven Dialogen vermittelt wird. Dabei wird die Geolokalisierungsfunktion des Smartphones genutzt um den Benutzer zu bedeutsamen Sehenswürdigkeiten zu führen, wo dann interaktive Minispiele oder Dialoge mit dem fiktionalen Reiseführer erfolgen. In der Route Esch steht die Geschichte des Luxemburgischen Bergbaus und den dortigen Minenarbeitern im Mittelpunkt. Die Route Trier handelt von einem Wettlauf zwischen Karl Marx und Nero. In diesem wird der Spieler von Karl Marx begleitet und lernt so bekannte Orte aus Trier kennen. Mit Hilfe der Feldversuche wurde sichtbar, dass die App großes Potential hat, um eine relativ autonome Erkundung der Städte zu initiieren und es auch den einheimischen SchülerInnen erlaubt, ihre Stadt mit neuen Augen bewusster wahrzunehmen. [less ▲]

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See detailIntergenerationelle Solidarität im Kontext von Migration: Gegenseitige Erwartungen, familienbezogene Werthaltungen und filiale Angst in portugiesischen und luxemburgischen Familien
Albert, Isabelle UL; Barros Coimbra, Stephanie UL

Scientific Conference (2018, September 20)

Vor dem Hintergrund einer sich am Übergang zum Rentenalter befindlichen ersten Generation von Migranten gewinnen Fragen zur intergenerationellen Solidarität in Familien mit Migrationshintergrund zunehmend ... [more ▼]

Vor dem Hintergrund einer sich am Übergang zum Rentenalter befindlichen ersten Generation von Migranten gewinnen Fragen zur intergenerationellen Solidarität in Familien mit Migrationshintergrund zunehmend an Bedeutung. Ein Verbleiben im Aufnahmeland könnte im Einklang mit kulturspezifischen Werthaltungen mit besonderen Erwartungen an die erwachsenen Kinder einhergehen. Die vorliegende Studie befasst sich ausgehend von Bengtson’s Solidaritätsmodell mit der Frage, wie sich die intergenerationelle Solidarität im Migrationskontext ausgestaltet, insbesondere welche gegenseitigen Erwartungen Eltern und erwachsene Kinder haben und wie der gegenseitige Austausch reguliert wird. Im Rahmen der vom FNR geförderten IRMA-Studie wurden mittels eines standardisierten Fragebogens Daten zur Familienkohäsion, zu gegenseitigen Erwartungen bezüglich Unterstützung und familienbezogenen Werthaltungen sowie zur filialen Angst und zum subjektiven Wohlbefinden an n = 67 in Luxemburg lebenden portugiesischen sowie n = 87 luxemburgischen Familien (Vater, Mutter und jeweils ein erwachsenes Kind) erhoben. Während luxemburgische und portugiesische Familien eine ähnlich hohe Familienkohäsion aufwiesen, zeigten sich Unterschiede in der Ausgestaltung des gegenseitigen Austauschs. Portugiesische Teilnehmer berichteten höhere Erwartungen bezüglich Kontakthäufigkeit und Unterstützung, wohingegen der Zusammenhalt luxemburgischer Familien eher durch eine generelle Verfügbarkeit bei Bedarf gekennzeichnet war. Es zeigte sich kein Mittelwertsunterschied der portugiesischen und luxemburgischen erwachsenen Kinder bezüglich filialer Angst. Während allerdings ein starker wahrgenommener Familienzusammenhalt mit geringerer filialer Angst in beiden Gruppen einherging, war ein stärkeres Bedürfnis nach Unabhängigkeit aber insbesondere bei den portugiesischen Kindern mit höherer filialer Angst verbunden. Die Ergebnisse werden unter Berücksichtigung intrafamilialer Prozesse der Beziehungsregulation im Rahmen eines integrativen Modells von Familienbeziehungen im Kontext von Altern und Migration diskutiert. [less ▲]

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See detailA digital and interactive historical atlas of the city of Luxembourg.
Uhrmacher, Martin UL; Kass, Steve UL

Scientific Conference (2018, September 20)

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See detailThe Impact of Feedback Trading on Option Prices
Lehnert, Thorsten UL

Scientific Conference (2018, September 20)

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See detailSymposium "Positive Psychologie III: Soziale Beziehungen"
Baudson, Tanja UL; Brohm-Badry, Michaela

Scientific Conference (2018, September 19)

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See detailUsing Log-File Data to Uncover Strategy Use in Complex Problem Solving
Nicolay, Björn Fabrice UL; Krieger, Florian UL; Lagou, Charalampia UL et al

Scientific Conference (2018, September 18)

The aim of the current project is to utilize log-file data to enhance the understanding of strategy use in Complex Problem Solving (CPS). CPS can be defined as the ability to manipulate the existing ... [more ▼]

The aim of the current project is to utilize log-file data to enhance the understanding of strategy use in Complex Problem Solving (CPS). CPS can be defined as the ability to manipulate the existing variables of a particular novel, complex, intransparent, and dynamic environment successfully in order to reach a predefined goal. In order to successfully solve a CPS task, the goal-directed application and variation of certain strategies is necessary. To uncover the systematic use of these strategies, log-files have been deemed a fruitful resource as they contain not only the final results of a computer-based CPS item, but also the individual steps undertaken while solving such a task. Recent studies using log-files have highlighted the importance of some strategies for CPS, like the varying one variable at a time (VOTAT) strategy, or of engaging in noninterfering observations (i.e., idle rounds). In addition, other strategies have also been shown to be relevant in neighboring fields of CPS. However, comprehensive studies investigating a broad repertoire of strategies applied in CPS are scarce. Hence, on the basis of existing large-scale assessment data sets, the present project set out to investigate which strategies hidden in log-files are relevant for solving a CPS task in order to gain a more thorough understanding of how CPS tasks are being approached. Preliminary findings indicate that, in addition to VOTAT and idle rounds, particularly the flexibility of switching between strategies should be taken into account. [less ▲]

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See detailTeachers´ attitudes towards inclusion: Effects of a training module
Pit-Ten Cate, Ineke UL; Krischler, Mireille Gilberte Pauline UL

Scientific Conference (2018, September 17)

The success of implementing inclusive practice depends on teachers´ competence as well as their attitudes. Attitudes are defined as psychological tendencies expressed by evaluating a particular entity ... [more ▼]

The success of implementing inclusive practice depends on teachers´ competence as well as their attitudes. Attitudes are defined as psychological tendencies expressed by evaluating a particular entity with some degree of favor or disfavor. Research has provided mixed results concerning teachers´ attitudes toward students with SEN and inclusive practice, whereby teachers generally have more positive attitudes toward the inclusion of students with mild SEN than toward students with complex needs. Training, especially modules focusing on the cognitive processes underlying judgment, can facilitate positive change in attitudes toward inclusion of students with SEN. In a pre–post-test design, data were collected for a sample of 33 experienced primary school teachers attending a course (2x4hr) on inclusion with a focus on the role of attitudes in decision-making and behavior. We assessed general attitudes toward the inclusion of students with SEN as well as teachers´ emotional reactions, stereotypes and behavioural intentions. Results of a repeated measures ANOVA, with time (pre vs. post) and general attitude toward inclusion (4 subscales) as within group factors only showed a main effect for attitudes, reflecting variations between the subscale scores. The training course did not result in changes in general attitudes. Further analyses revealed a positive pre-post course change in teachers´ emotional reactions concerning the inclusion of a student with SEN in their class. Teachers´ stereotype ratings indicated they perceived students with learning difficulties as less competent but warm, whereas students with challenging behavior were perceived as relatively competent but average in warmth. Finally, teachers´ behavioral intentions shifted from focusing on finding solutions within the classroom to more cooperation with colleagues, parents and experts to provide the best support for the student with SEN. In sum, the training course impacted both the affective and conative components of attitudes, whereas general attitudes toward inclusion remained unchanged. [less ▲]

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See detailAqvist's Dyadic Deontic Logic E in HOL
Benzmüller, Christoph UL; Farjami, Ali UL; Parent, Xavier UL

Scientific Conference (2018, September 17)

We devise a shallow semantical embedding of \AA{}qvist's dyadic deontic logic {\bf E} in classical higher-order logic. This embedding is encoded in Isabelle/HOL, which turns this system into a proof ... [more ▼]

We devise a shallow semantical embedding of \AA{}qvist's dyadic deontic logic {\bf E} in classical higher-order logic. This embedding is encoded in Isabelle/HOL, which turns this system into a proof assistant for deontic logic reasoning. The experiments with this environment provide evidence that this logic \textit{implementation} fruitfully enables interactive and automated reasoning at the meta-level and the object-level. [less ▲]

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See detailI/O Logic in HOL
Farjami, Ali UL; Meder, Paul Joseph Yves UL; Parent, Xavier UL et al

Scientific Conference (2018, September 17)

A shallow semantical embedding of Input/Output logic in classical higher-order logic is presented, and shown to be faithful (sound an complete). This embedding has been implemented in the higher-order ... [more ▼]

A shallow semantical embedding of Input/Output logic in classical higher-order logic is presented, and shown to be faithful (sound an complete). This embedding has been implemented in the higher-order proof assistant Isabelle/HOL. We provide an empirical regulative framework for assessing General Data Protection Regulation. [less ▲]

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See detailChanges in preservice teachers´ attitudes toward inclusion: the role of competence
Pit-Ten Cate, Ineke UL; Krischler, Mireille Gilberte Pauline UL

Scientific Conference (2018, September 13)

Following policies to promote a more equitable and inclusive educational system, the question arises how to prepare teachers to accommodate an increasingly heterogeneous student population. As teachers´ ... [more ▼]

Following policies to promote a more equitable and inclusive educational system, the question arises how to prepare teachers to accommodate an increasingly heterogeneous student population. As teachers´ competence concerning inclusion is grounded in their training (e.g. Baker-Ericzen et al. 2009), courses focussing on inclusion as an educational practice could reduce uncertainties (e.g. Carroll et al. 2003). However, inclusion not only depends on teachers´ competence but also on their attitudes. Teachers’ attitudes may be pivotal for the success of inclusive education as they can elicit differential expectations and behaviors, which can enhance or limit the successful inclusion of students with special educational needs (SEN). Avramidis and Norwich (2002) stressed the importance of training in the formation of positive attitudes toward the integration of students with SEN. Although several studies have reported positive changes in attitudes following a course on inclusive education (e.g. Shade & Stewart, 2001), the relationship between competence and attitudes is less clear. Therefore, this study aimed to evaluate the effect of a course on inclusive pedagogy on competence and attitudes and the association between these constructs. Data were collected for 69 preservice teachers enrolled in a course on inclusive pedagogy. Attitudes toward the inclusion of students with SEN were assessed before and after the course, using the German version of The Opinions Relative to Integration of Students with Disabilities questionnaire (ORI; Benoit & Bless, 2014). In addition, at the end of the course students indicated to what extend the course had helped them to gain knowledge, skills and strategies concerning teaching a heterogeneous student population. Results of a repeated measures 2×4 ANOVA, with time (pre vs. post) and attitude towards inclusion (ORI subscales) as within group factors showed a main effect for attitudes, reflecting variations between the subscale scores. A significant time × attitudes interaction effect indicated positive attitude changes over time, but only in the domain of educational and social progression of students with SEN. Results of a regression analysis indicated that, after controlling for pre-course attitude ratings, perceived competence predicted attitude ratings at the end of the course. This study shows that teacher training can positively affect both teachers´ competence and attitudes concerning inclusive education, whereby perceived competence contributed to positive attitude change. [less ▲]

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See detail(Re)writing gender - gender constructions in autobiographies written by trans people
Artuso, Sandy Kathy UL

Scientific Conference (2018, September 13)

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See detailA Bilingual Study for Personalized Sentiment Model PERSEUS
Guo, Siwen UL; Schommer, Christoph UL

Scientific Conference (2018, September 10)

This paper investigates the significance of analyzing language preferences in personalized sentiment analysis. Motivated by the considerable amount of text generated by multilingual speakers on social ... [more ▼]

This paper investigates the significance of analyzing language preferences in personalized sentiment analysis. Motivated by the considerable amount of text generated by multilingual speakers on social platforms, we focus on constructing a single model that is able to analyze sentiments in a multilingual environment. In particular, Twitter texts are used in this research where the choice of language can be switched at a message-, sentence-, word- or topic-level. To represent and analyze the text, we extract concepts and main topics from the text and apply a recurrent neural network with attention mechanism in order to learn the relation between the lexical choices and the opinions of each sentiment holder. The personalized sentiment model PERSEUS is applied as the central structure of this research. Moreover, a language index is added to each concept to enable multilingual analysis, which provides a solution for analyzing code-switching in the text as well. In this work, English and German are chosen for a pilot study, and an artificial corpus is created to evaluate the situation with multilingual speakers. [less ▲]

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See detailWhat you give you get, or not? The effects of intergenerational family solidarity on subjective well-being
Albert, Isabelle UL; Barros Coimbra, Stephanie UL

Scientific Conference (2018, September 06)

Much attention has been focused on intergenerational relations and family cultures as these developments are, amongst others, related to important socio-demographic changes creating a new reality for ... [more ▼]

Much attention has been focused on intergenerational relations and family cultures as these developments are, amongst others, related to important socio-demographic changes creating a new reality for families in Europe. Thus, solidarity and mutual support between adult children and their older parents are of particular interest as the exchange and “amount” of mutual support between both generations might gain importance for the well-being of each family member. Additionally, the specific context of migration can arouse special needs in terms of intergenerational support. The current study presents a cross-cultural comparison between Luxembourgish native and Portuguese migrant families, all living in Luxembourg. Quantitative data (n = 118 family triads) gathered by means of standardised questionnaires as well as qualitative data (n = 20 family dyads) collected with face-to-face interviews underlie the discussed results. Regardless of the culture, quantitative results show a higher provided social support from parents to children than the received one. However, PT children reported receiving as much as providing social support to their parents, while LU children reported receiving more support than the one they give. Further analyses will be carried out in order to differentiate between different kinds of support (financial, instrumental and emotional) making use of quantitative as well as qualitative data. Implications regarding family solidarity will be discussed in order to highlight similarities and differences between and within cultures and family generations. [less ▲]

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See detailFamily, migration, and intergenerational solidarity
Albert, Isabelle UL

Scientific Conference (2018, September 06)

Migration and cultural diversity are key issues for many European countries today, and family relations are becoming increasingly important in this context. Intergenerational solidarity can have different ... [more ▼]

Migration and cultural diversity are key issues for many European countries today, and family relations are becoming increasingly important in this context. Intergenerational solidarity can have different forms and may differ across as well as within cultures. In fact, different patterns of support have been found comparing migrant with non-migrant families. In general, parents represent an important resource of support even for adult children; the other way round, offspring in migrant families have been found to provide substantial practical support for their parents such as help with administrative tasks or translations already at younger ages, and family support can become more important with increasing age when older migrants need help or care. Families migrating from more collectivist, family-oriented to more individualistic cultural contexts might find it difficult to adapt to prevalent values and practices regarding intergenerational support in the receiving society, and adult children might experience strain and difficulties in meeting their parents’ expectations. Further, the question of how families arrange intergenerational solidarity in the light of multilocality becomes pertinent as migrants are confronted with the task to regulate their relations with family members who stay in their countries of origin. The present symposium deals with these questions by use of both quantitative and qualitative methods, bringing together researchers from four European countries (Switzerland, Germany, Luxembourg, and Portugal) which are characterized by high numbers of immigrants resp. emigrants. First, Bettina Isengard, Ronny König and Marc Szydlik explore patterns of intergenerational family solidarity all over Europe, concentrating on differences between migrant and non-migrant families as well as geographical distance between family members. Second, Heike Buhl, Sabrina Sommer and Christian Hoellger have a closer look at felt obligations to support parents in a sample from Germany, thereby examining in how far migrants and non-migrants differ with regard to their adherence to family values and how these are related to other aspects of intergenerational solidarity. Stephanie Barros and Isabelle Albert focus then on intergenerational support exchange in Portuguese migrant compared to Luxembourgish families with young adult children. Finally, Carlos Barros, Luana Cunha Ferreira and Carla Crespo analyse the relationship between emigrated family members and those who stay in the country of origin, namely Portugal, focusing in particular on aspects of intergenerational support to foster well-being and cohesion. The contributions will be discussed by Elke Murdock taking into account aspects of multicultural identity and integration and their roles for the regulation of family relations. [less ▲]

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See detailFamily, migration and intergenerational solidarity - Discussion
Murdock, Elke UL

Scientific Conference (2018, September 06)

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See detail(In)flexible Language Use in a Year 4 Class in Luxembourg: Which Languages in Which Subjects?
Kirsch, Claudine UL; Degano, Sarah UL

Scientific Conference (2018, September 06)

The project described in this paper is part of the broader research project ‘Capitalizing on Linguistic Diversity in Education’ that investigates how multilingualism can be used as a resource for ... [more ▼]

The project described in this paper is part of the broader research project ‘Capitalizing on Linguistic Diversity in Education’ that investigates how multilingualism can be used as a resource for educational success and social well-being in Luxembourg. Research projects in preschool, Year 1 and Year 2 classes show that teachers have begun to draw on children’s semiotic repertoires (Kirsch 2017, Kirsch and Bes 2017). The present doctoral research project aims to understand the ways in which and the extent to which, first, Year 4 and Year 5 teachers in three schools address linguistic diversity and, second, children draw on their language repertoire to learn. The focus lies on the translanguaging practices of teachers and children. Translanguaging is a pillar of multilingual pedagogies which promote social equity and build on socio-constructivist learning theories (García & Li Wei 2014). The education system in Luxembourg is trilingual in Luxembourgish, German and French. The curriculum is based on monoglossic ideologies and a compartmentalised view of language teaching (De Korne 2012). The system is particularly challenging for the 63.5 percent of primary school children who do not speak Luxembourgish as a first language and underachieve compared to the Luxembourgish-speakers (Menje 2017). This paper draws its data from six days of observations and video-recordings of learning activities in seven French, eight Mathematics and two Arts lessons from September 2017 to January 2018 in one school characterised by the diversity of its intake and the high SES of the families. The data collection is still on-going. The participants are the two teachers of the Year 4 class and three focus children of Slovenian, French and Icelandic background. The thematic analysis focuses on the type of learning activities, the school subjects, the speech acts, the language use, and the pedagogical use of translanguaging. The preliminary findings show that almost all learning activities are teacher-led and that interactions are based on initiation-response-feedback sequences. The teachers systematically translanguage between a target language and the other curricula languages to scaffold learning, build relationships and manage the classroom. Both teachers and children create a specific space for German which is highly unusual in Luxembourg. The children rarely draw on their home languages unless these are the three languages of the country. While translanguaging is frequently used as a scaffold, it is neither transformative nor does it contribute to raising equal opportunities (García & Kleyn 2016). [less ▲]

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See detailSocial participation and peer relationships of students with special educational needs
Pit-Ten Cate, Ineke UL

Scientific Conference (2018, September 06)

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See detailNumerical study on the load bearing capacity of a steel U section beam used as a formwork in constrcution stage
Turetta, Maxime UL; Khelil, Abdelouahab; Odenbreit, Christoph UL et al

Scientific Conference (2018, September 05)

For many categories of buildings, the structural elements must be fire resistant to allow people to evacuate and firefighters to intervene. A new type of steel-concrete composite solution dedicated to ... [more ▼]

For many categories of buildings, the structural elements must be fire resistant to allow people to evacuate and firefighters to intervene. A new type of steel-concrete composite solution dedicated to steel building structures is under development to resist against this fire situation. The solution is composed of a steel U section acting as a formwork for a reinforced concrete part that provides the fire resistance. In order to keep the habits of steel construction, the solution is unpropped in construction stage and the concrete is casted on site. Thus the solution has to resist against three majors situations: the construction stage without propping, the exploitation stage and the fire situation. The steel part of the composite beam is then designed to face the construction stage without propping. The present paper describes the numerical investigations carried out on the load bearing capacity of this steel section in construction stage. The objective of these investigations is to finally propose a steel solution stable and resistant for its use during construction stage. The numerical model of the steel section and its boundary conditions are presented. A first elastic calculation is used to determine the Eigen modes of the beam that give the shape of initials imperfections. Then analysis considering materials non-linearity and geometrical imperfections (GMNIA calculation) are carried out. A sensitivity study on the influence of the geometrical imperfections on the load bearing capacity of the beam is performed. Then, with the more conservative initial imperfection, a study on the global stability of the beam without any intermediate restraint is carried out. Finally, to overcome the problem of instability in construction stage, the restraint induced by the perpendicular steel decks is investigated. [less ▲]

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See detailInclusive multilingual pedagogies in a preschool in Luxembourg
Mortini, Simone UL

Scientific Conference (2018, September 04)

Detailed reference viewed: 19 (6 UL)
See detailVom Intriganten zum 'Outlaw' : Schurken in Shakespeares "Richard III" und Schillers "Die Räuber"
Kohns, Oliver UL

Scientific Conference (2018, September)

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See detailAn equation-free, nested, concurrent multiscale approach without scale-separation
Beex, Lars UL; Kerfriden, Pierre

Scientific Conference (2018, September)

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See detailProblem solving and its role in large-scale assessments. Transversal skills in educational research
Greiff, Samuel UL

Scientific Conference (2018, September)

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See detailA Closer Look at Real-World Patches
Liu, Kui UL; Kim, Dongsun UL; Koyuncu, Anil UL et al

Scientific Conference (2018, September)

Bug fixing is a time-consuming and tedious task. To reduce the manual efforts in bug fixing, researchers have presented automated approaches to software repair. Unfortunately, recent studies have shown ... [more ▼]

Bug fixing is a time-consuming and tedious task. To reduce the manual efforts in bug fixing, researchers have presented automated approaches to software repair. Unfortunately, recent studies have shown that the state-of-the-art techniques in automated repair tend to generate patches only for a small number of bugs even with quality issues (e.g., incorrect behavior and nonsensical changes). To improve automated program repair (APR) techniques, the community should deepen its knowledge on repair actions from real-world patches since most of the techniques rely on patches written by human developers. Previous investigations on real-world patches are limited to statement level that is not sufficiently fine-grained to build this knowledge. In this work, we contribute to building this knowledge via a systematic and fine-grained study of 16,450 bug fix commits from seven Java open-source projects. We find that there are opportunities for APR techniques to improve their effectiveness by looking at code elements that have not yet been investigated. We also discuss nine insights into tuning automated repair tools. For example, a small number of statement and expression types are recurrently impacted by real-world patches, and expression-level granularity could reduce search space of finding fix ingredients, where previous studies never explored. [less ▲]

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See detailDie Vorhersage von Selbstkontrolle durch Need for Cognition. Generalisierbarkeit und Erklärungsansätze
Grass, Julia; Krieger, Florian UL; Paulus, P. et al

Scientific Conference (2018, September)

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See detailOn the impact of tokenizer and parameters on N-gram based Code Analysis
Jimenez, Matthieu UL; Cordy, Maxime UL; Le Traon, Yves UL et al

Scientific Conference (2018, September)

Recent research shows that language models, such as n-gram models, are useful at a wide variety of software engineering tasks, e.g., code completion, bug identification, code summarisation, etc. However ... [more ▼]

Recent research shows that language models, such as n-gram models, are useful at a wide variety of software engineering tasks, e.g., code completion, bug identification, code summarisation, etc. However, such models require the appropriate set of numerous parameters. Moreover, the different ways one can read code essentially yield different models (based on the different sequences of tokens). In this paper, we focus on n- gram models and evaluate how the use of tokenizers, smoothing, unknown threshold and n values impact the predicting ability of these models. Thus, we compare the use of multiple tokenizers and sets of different parameters (smoothing, unknown threshold and n values) with the aim of identifying the most appropriate combinations. Our results show that the Modified Kneser-Ney smoothing technique performs best, while n values are depended on the choice of the tokenizer, with values 4 or 5 offering a good trade-off between entropy and computation time. Interestingly, we find that tokenizers treating the code as simple text are the most robust ones. Finally, we demonstrate that the differences between the tokenizers are of practical importance and have the potential of changing the conclusions of a given experiment. [less ▲]

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See detailRisk disclosure and analyst following: a study of French listed firms
Derouiche, Imen UL; Muessig, Anke UL; Weber, Véronique UL

Scientific Conference (2018, September)

In this study, we analyse the association between risk disclosure and analyst following for a sample of non-financial French listed firms from 2007 to 2015. We identify the number of sentences, the risk ... [more ▼]

In this study, we analyse the association between risk disclosure and analyst following for a sample of non-financial French listed firms from 2007 to 2015. We identify the number of sentences, the risk words, the risk related sentences, and the risk factors as risk disclosure quantity. Company-specific risk factors, industry-specific risk factors, numeric intensity, the degree of similarity, and the degree of boilerplate measure risk disclosure quality. On the aggregated level, the quantity of risk information provided is not significantly associated with analyst following. For the quality, results show that the quality of risk disclosure is an important determinant of analysts’ decision to follow a firm. The higher the quality, expressed as less similar language and more revised information, the more likely it is that analysts follow the firm. From a theoretical perspective, this suggests that analysts are information intermediaries and not information providers. On the non-aggregated level, for the individual quantity measures, the results are ambiguous. For the individual quality measures, results on the aggregated level are confirmed. [less ▲]

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See detailControllability of transportation networks
Rinaldi, Marco UL; Viti, Francesco UL

Scientific Conference (2018, September)

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See detailInformation Content of Systematic Risk Disclosure
Weber, Véronique UL; Muessig, Anke UL

Scientific Conference (2018, September)

We analyse the relation between systematic risk disclosure, which is the description of a company’s exposure to systematic risk factors and its influence on investors’ risk perception for a sample of UK ... [more ▼]

We analyse the relation between systematic risk disclosure, which is the description of a company’s exposure to systematic risk factors and its influence on investors’ risk perception for a sample of UK listed firms from 2017 to 2015. Our results show that investors react to the systematic component of risk exposure description in the annual report; the information is incorporate into the capital market. For annual reports of financial years ending in 2013 or after, the relation between systematic risk disclosure and investors’ risk perception is negative compared to a positive relation for the annual reports ending before 2013. The mandatory strategic report introduced in 2013, in which firms are required to describe their risk exposure, seems to foster more timely description of risks and uncertainties. Therefore, firms tend to solely update the risk information in their annual reports in subsequent years and thus they resolve known risk factors rather than introducing new ones. [less ▲]

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See detailDecompositions of the optimal dispatching problem of electric and electric-hybrid buses with energy constraints for Luxembourg City
Picarelli, Erika; Rinaldi, Marco UL; Viti, Francesco UL et al

Scientific Conference (2018, September)

We are a team of engineers working on a concrete project of Mobility in Luxembourg. We want to solve the problem of optimally determining the sequence of electric and hybrid electric buses, considering ... [more ▼]

We are a team of engineers working on a concrete project of Mobility in Luxembourg. We want to solve the problem of optimally determining the sequence of electric and hybrid electric buses, considering both service constraints (schedule adherence) and energy constraints (electric bus charging status, bus recharging scheduling in capacitated facilities) and at the same time ensure a high level of quality of service for the user satisfaction. The problem is formulated as a Mixed Integer Linear Program, with the objective of minimizing the total operational cost for the bus lines in question. System dynamics are captured by twenty sets of constraints, ranging from scheduling adherence to discharge-recharge dynamics. Individual operational costs at the bus level (cost of running an electric / non-electric bus per km, cost of recharging) and at the trip level (penalty due to failed schedule adherence) are fully parametrised, allowing for extensive sensitivity analysis. We investigate a real-life case study based in the city of Luxembourg, where the objective is to reach the all-electric mode for principal urban buses network. Through the model we investigate: the minimum amount of electric buses necessary to perform a day’s schedule for two currently partially electrified lines, without resorting to conventional internal combustion alternatives; the impact of electrifying two additional lines, specifically considering the trade-offs related to either adding new buses or new charging stations at the bus terminal. Finally, we studied how to best decompose the overall problem in several smaller problems, to be able to solve also realistic scenarios and using large real data sets from the Mobility Data owner of Luxembourg. We analysed and compared two kinds of decomposition: a bus line-based decomposition, and a time-based decomposition. [less ▲]

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See detailContested Claims for Social and Environmental Justice. Ambivalences between Mundane and Deliberate Consumption in Alternative Food Networks
Reckinger, Rachel UL

Scientific Conference (2018, August 30)

Recently, a number of resourceful community-driven initiatives for local food production and retail have arisen in Luxembourg, where low organic agricultural rates are paired with high consumer demands ... [more ▼]

Recently, a number of resourceful community-driven initiatives for local food production and retail have arisen in Luxembourg, where low organic agricultural rates are paired with high consumer demands for organic produce. The main impact that heterodox actors can have seems to be the creation of resourcefulness from innovative niches, not designed to be upscaled but spread by ubiquitous networking. The motivations of actors involved in such social movements, albeit diverse, tend to stem from a stance of care and ethical (self)government, often using community self-organisation-tools. Based on qualitative interviews and participant observation, we expand on four case studies of fruit and vegetable production as well as unpackaged and socially responsible food retail in Luxembourg. One has been established since the 1980s with over 200 employees, partly in social insertion measures, producing and importing organic fruit and vegetables. Since 2014, three significantly smaller initiatives with higher citizen involvement have emerged. These recent initiatives are more radical in their agro-ecological and/or permaculture practices, proposing a political enacting of circular economy precepts. Yet, daily practices stay embedded in social, cultural and economic constraints and in routines, which are built on tacit knowledge, collective learning and engrained practices; even though repetitive, they can account for both reproduction and innovation. By analysing ethical entrepreneurship and the governmentality at its core as well as ambivalences and paradoxes between mundane and deliberate forms of consumption, this paper touches on interrelations between food policies and the politics of contested claims for, and practices of, social and environmental justice. [less ▲]

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See detailCategories of coalgebras for modal extensions of Łukasiewicz logic
Teheux, Bruno UL; Kurz, Alexander

Scientific Conference (2018, August 27)

The category of complete and completely distributive Boolean algebras with complete operators is dual to the category of frames. We lift this duality to the category of complete and completely ... [more ▼]

The category of complete and completely distributive Boolean algebras with complete operators is dual to the category of frames. We lift this duality to the category of complete and completely distributive MV-algebras with complete operators. [less ▲]

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See detailFrom the Dustbin of History: Rethinking the History of Amateur Media in a Historical Conversation
Aasman, Susan; van der Heijden, Tim UL; Slootweg, Tom

Scientific Conference (2018, August 23)

“Amateurs of one era are not the amateurs of another, even when a continuous tradition exists to connect them”, is an intriguing statement made by Lisa Gitelman (2014). Overall, Gitelman’s answer would ... [more ▼]

“Amateurs of one era are not the amateurs of another, even when a continuous tradition exists to connect them”, is an intriguing statement made by Lisa Gitelman (2014). Overall, Gitelman’s answer would favor a certain level of complexity as to avoid ‘sloppy media history’ even when a continuous tradition exists to connect them (137). Rather, we should explore how amateur filmmakers ‘doing and its do-ability’ can differ as they are situated in broader historical contexts. Building on this idea of a complex and dynamic history, that consists of a diversity of histories, we propose to start a semi-structured conversation between three experts in amateur media and between the experts and the audience. We seek to follow traces that connect or disconnect the various discourses and practices in amateur media history in which amateurism encountered predictions, hopes, and tried out appropriations of amateur media technologies as an alternative/marginal media space. The set of related concepts that will be deployed through time and in relation to different historical contexts are: marginality, democratization, resistance, alternative, avant-garde, subversive and experimental. By comparing, contrasting and evaluating these set of concepts we hope to add to the overall goal of the conference to open up a space to rethink historiography. [less ▲]

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See detailWhen the exception becomes the rule … When the margins become the center …
Schafer, Valerie UL

Scientific Conference (2018, August 23)

This contribution invited participants of the Summer school to critically reflect upon centers and peripheries in Internet history, not only from a geographical perspective , but also from a narrative ... [more ▼]

This contribution invited participants of the Summer school to critically reflect upon centers and peripheries in Internet history, not only from a geographical perspective , but also from a narrative standpoint [less ▲]

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