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See detailDark Souls like "Dark Souls": Personality Characteristics and Preference for Violent Video Games
Melzer, André UL; Engelberg, Elisabeth

Scientific Conference (2018, May)

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See detailBilderbücher als Medium zum Valorisieren der Familiensprachen im Précoce
Andersen, Katja Natalie UL; Reuland, Claudine; Rios-Ney, Jessica

Scientific Conference (2018, April 26)

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See detailUnderstanding Anomaly Decay
Penasse, Julien UL

Scientific Conference (2018, April 24)

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See detailJoint Wireless Information and Energy Transfer in Cache-assisted Relaying Systems
Gautam, Sumit UL; Vu, Thang Xuan UL; Chatzinotas, Symeon UL et al

Scientific Conference (2018, April 16)

We investigate the performance of time switching (TS) based energy harvesting model for cache-assisted simultaneous wireless transmission of information and energy (Wi-TIE). In the considered system, a ... [more ▼]

We investigate the performance of time switching (TS) based energy harvesting model for cache-assisted simultaneous wireless transmission of information and energy (Wi-TIE). In the considered system, a relay which is equipped with both caching and energy harvesting capabilities helps a source to convey information to a destination. First, we formulate based on the time-switching architecture an optimization problem to maximize the harvested energy, taking into consideration the cache capability and user quality of service requirement. We then solve the formulated problem to obtain closed-form solutions. Finally, we demonstrate the effectiveness of the proposed system via numerical results. [less ▲]

See detailBelgien in Deutschland oder Belgier in Deutschland? Die Zeit der Präsenzpolitik (1945-1955)
Brüll, Christoph UL

Scientific Conference (2018, April 12)

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See detailPathologies of Empathy: Kant, Polidori, Hoffmann
Kohns, Oliver UL

Scientific Conference (2018, April)

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See detailYale Symposium on Art and Gender
Penasse, Julien UL

Scientific Conference (2018, March 29)

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See detailWalks in Luxembourg: researching forced migrants’ multilingual language practices
Kalocsanyiova, Erika UL

Scientific Conference (2018, March 28)

Luxembourg has a long-standing tradition of multilingualism: according to the 1984 language law, Luxembourgish, German and French are all acknowledged as languages of administration. This rich linguistic ... [more ▼]

Luxembourg has a long-standing tradition of multilingualism: according to the 1984 language law, Luxembourgish, German and French are all acknowledged as languages of administration. This rich linguistic environment is further complexified by the languages and language varieties of the large international community – composed of 160 different nationalities – that resides in Luxembourg City. Hence, other languages such as English, Portuguese or Italian might be equally important for navigating local life. Most members of the local society move fluidly back and forth between a multitude of languages, often within a single speech event. Luxembourg’s multilingualism is not territory-based; it is reflected in different patterns of language use that are intertwined with competing social positions and collective identities (Horner, 2015). This contribution presents data from an ongoing doctoral research project that follows the language learning trajectory of five asylum applicants in Luxembourg. The project follows a linguistic ethnographic approach (Copland & Creese, 2015), which is well suited to reveal the participants’ attitudes towards different languages, practices and (linguistic) identities. Based on participant observation, interviewing and go-alongs (Kusenbach, 2003), the present contribution examines how research participants draw on their linguistic resources as they move across different sites in their daily trajectories. Their language practices are analysed as in situ responses to specific situations/settings in Luxembourg’s multilingual environment. Our findings suggest that in their daily interactions, the research participants use both their old and newly-acquired language resources, without too much regard to the boundaries between them. This confirms the asylum applicants’ positive attitude towards Luxembourg’s languages and their wish to incorporate a wide range of local resources into their communicative repertoires (Kalocsányiová, 2017). By the same token, the participants’ multilingual practices are indicative of new complex forms of linguistic identification. [less ▲]

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See detailContested Autonomies: French University Governance and its Discontents
Harmsen, Robert UL

Scientific Conference (2018, March 28)

In the past decade, the governance of French universities has seen substantial changes in line with developments elsewhere in Europe. Engaging in an ‘autonomy/accountability two-step’, French universities ... [more ▼]

In the past decade, the governance of French universities has seen substantial changes in line with developments elsewhere in Europe. Engaging in an ‘autonomy/accountability two-step’, French universities have been granted a significantly higher degree of organisational autonomy while at the same time becoming subject to a widening set of external accountability measures. The French case nonetheless presents interesting specificities stemming particularly from the absence of a strong tradition of institutional-level university autonomy. The present paper explores current reforms against the background of this distinctive historical tradition, probing the mediation of ‘global scripts’ by ‘national filters’. After setting out the broad contours of the historical model, successive sections then survey the 2007 Law on the Liberty and Responsibility of Universities, the 2013 Fioraso Law, and the possible direction of policy under the Macron presidency. The concluding section situates French developments relative to wider trends in terms suggestive of a forward research agenda. [less ▲]

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See detailForced Migration, Borders and Multilingualism: The Ideological Grounds of Linguistic Integration in Luxembourg
Kalocsanyiova, Erika UL

Scientific Conference (2018, March 27)

The purpose of this contribution is to identify the complexities that surround the linguistic integration of forced migrants in multilingual societies. We present data from an ongoing doctoral research ... [more ▼]

The purpose of this contribution is to identify the complexities that surround the linguistic integration of forced migrants in multilingual societies. We present data from an ongoing doctoral research project that follows the trajectory of five refugees who fleeing war and political unrest in the Middle East, sought international protection in Luxembourg. Large proportion of Luxembourg’s workforce originates or lives outside of the boundaries of the nation state (Statec, 2016). The notion of a homogenous speech community – be it formulated in terms of a monolingual identification with the Luxembourgish language, or as a trilingual identification with the three languages (Luxembourgish, French and German) recognized by the language law of 1984 (Horner, 2015) – is continuously under pressure. The erosion of traditional linguistic boundaries is reinforced by the strong presence of English, Portuguese, Italian and dozens of other migrant languages, including the multiple language resources forced migrants bring to this context. This creates new forms of linguistic intersection, where the negotiation of differences can lead to either the reinforcement of existing barriers, or the embracement of the multilingual affordances created by this new emerging context (Kalocsányiová, 2016 & 2017). In multilingual societies, the successful navigation of local life requires the development of different capabilities in a variety of languages and for a range of purposes. According to the research participants’ accounts, their language learning trajectory in Luxembourg has been substantially influenced by the uncertainty of their situation. Forced migrants “dwell on the borders” while awaiting a decision on their asylum claims and beyond, which has clear implications for their language choices and the language learning options available to them. The project follows a linguistic ethnographic approach (Copland & Creese, 2015): based on interviewing, participant observations and go-alongs, we examine a broad range of competing ideologies that forced migrants are required to balance in their daily efforts to integrate. [less ▲]

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See detailYouth Mobility – experiencing (un)certainties
Kmiotek, Emilia Alicja UL; Vysotskaya, Volha UL

Scientific Conference (2018, March 19)

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See detailMagnetic neutron scattering studies on magnetic materials
Michels, Andreas UL

Scientific Conference (2018, March 11)

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See detailSmall State, Great Diplomacy: The Role of Luxembourg in the European Integration Process
Danescu, Elena UL

Scientific Conference (2018, March)

Luxembourg has a particular geopolitical and historical situation — a small, multicultural and multilingual nation sandwiched between two larger powers, France and Germany, with no central bank or ... [more ▼]

Luxembourg has a particular geopolitical and historical situation — a small, multicultural and multilingual nation sandwiched between two larger powers, France and Germany, with no central bank or national currency. For Luxembourg, adopting an outward orientation had always been a sine qua non. After the second world war the political leaders were convinced of the need to preserve national sovereignty and vital interests by maintaining an international outlook. The European principle of equality among states also guaranteed Luxembourg a role in decision-making and in the leadership of joint organizations. By giving up part of its sovereignty Luxembourg paradoxically actually strengthened its sovereignty. Since then, Luxembourg has played and continues to act as a mediator and a force for ideas at the heart of EU, either as a member State or through some of its leaders. Since the time of Joseph Bech, from Pierre Werner and Gaston Thorn to Jacques Santer and Jean-Claude Juncker more recently, Luxembourg has proved itself to be a master in the art of political consensus and a rich source of leaders who have been able to find a way out of Europe’s successive impasses (among them: the ‘battle of the seats’ of the Community institutions, UK accession, BLEU, Benelux). The influential nature of its leadership gave Luxembourg a role in the European integration process that far outweighed the country’s socio-economic impact [less ▲]

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See detailPrinciples, Values and Challenges for a Europe Built through Currency
Danescu, Elena UL

Scientific Conference (2018, March)

At the Hague Summit (1–2 December 1969), the decision was taken to explore the possibilities of progress towards an economic and monetary union. An ad hoc committee of experts was set up and, at the ... [more ▼]

At the Hague Summit (1–2 December 1969), the decision was taken to explore the possibilities of progress towards an economic and monetary union. An ad hoc committee of experts was set up and, at the request of the EC Council, Pierre Werner (Prime Minister and Finance Minister of Luxembourg) was chosen as chairman. The work of this committee began on 20 March 1970 and resulted in the Werner Report - presented on 8 October in Luxembourg. The Werner Report offered a full definition of EMU, which was to be established in three stages over a decade (1971–80). The ultimate aim was to achieve irreversible convertibility between the currencies of the Member States, the complete liberalization of capital movements, the irrevocable fixing of exchange rates, and even potentially the replacement of national currencies by a single currency as a natural and desirable further development of monetary union. From an institutional viewpoint, the report called for the creation of two new steering bodies: a ‘centre of decision for economic policy’, independent of governments and placed under the democratic control of the European Parliament, to be elected by universal suffrage; and a ‘Community system for the central banks’. Also, EMU would serve as a ‘leaven’ for the development of a political union. Two main principles underpinned the Werner Report: gradual realization of EMU (a step-by-step approach); and parallelism between economic convergence and transfer of powers to the supranational level. The Report ran into a series of international crises (which led to the collapse of the IMS), culminating to its de facto suspension in 1974. Three decades later, the Delors Report was to give the Werner Report the credit due to it, by appropriating its overall philosophy and structure. Both reports define monetary union in almost identical terms, but in some respects the Werner Report goes further and is more clear cut than the Delors Report. This paper aims to analyze why the Werner Report marked a crucial stage in the process of European integration and was offered, through its principles, values and ideas, a blueprint of EMU in the EU. [less ▲]

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See detailImpact of inspection on public opinion (invited symposium contribution)
Fischbach, Antoine UL

Scientific Conference (2018, March)

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See detailNon-intrusive Distracted Driving Detection Based on Driving Sensing Data
Jafarnejad, Sasan UL; Castignani, German UL; Engel, Thomas UL

Scientific Conference (2018, March)

Nowadays Internet-enabled phones have become ubiquitous, and we all witness the flood of information that often arrives with a notification. Most of us immediately divert our attention to our phones even ... [more ▼]

Nowadays Internet-enabled phones have become ubiquitous, and we all witness the flood of information that often arrives with a notification. Most of us immediately divert our attention to our phones even when we are behind the wheel. Statistics show that drivers use their phone on 88% of their trips and on 2015 in the UnitedKingdom 25% of the fatal accidents were caused by distraction or impairment. Therefore there is need to tackle this issue. However, most of the distraction detection methods either use expensive dedicated hardware and/or they make use of intrusive or uncomfortable sensors. We propose distracted driving detection mechanism using non-intrusive vehicle sensor data. In the proposed method 9 driving signals are used. The data is collected, then two sets of statistical and cepstral features are extracted using a sliding window process, further a classifier makes a prediction for each window frame, lastly, a decision function takes the last l predictions and makes the final prediction. We evaluate the subject independent performance of the proposed mechanism using a driving dataset consisting of 13 drivers. We show that performance increases as the decision window become larger.We achieve the best results using a Gradient Boosting classifier with a decision window of total duration 285seconds which yield ROC AUC of 98.7%. [less ▲]

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See detailBayesian optimization to enhance coverage performance of a swarm of UAV with chaotic dynamics
Kieffer, Emmanuel UL; Rosalie, Martin UL; Danoy, Grégoire UL et al

Scientific Conference (2018, February 26)

We introduce the optimization of CACOC through Bayesian Optimization. CACOC is based on a chaotic system, i.e. Rossler system whose behavior can be modified by tuning the α parameter. In order to evaluate ... [more ▼]

We introduce the optimization of CACOC through Bayesian Optimization. CACOC is based on a chaotic system, i.e. Rossler system whose behavior can be modified by tuning the α parameter. In order to evaluate the performance of CACOC for different value of α, the coverage metric has to be evaluated after simulation. The latter is time-consuming. Therefore, a surrogate-based optimization, i.e. Bayesian Optimization has been privilegied to tackle this issue. An analysis of the chaotic system with the obtained α value has been performed to compare the periodic orbits and their associated patterns. Numerical results show that the best α value avoid a waste of time in periodic region of the bifurcation diagram. Future works will focus on more complex chaotic system as well as new application domain of the optimized CACOC approach. [less ▲]

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See detailEmployment and higher education related mobilities: The case of Luxembourg
Nienaber, Birte UL; Kmiotek, Emilia Alicja UL; Samuk, Sahizer UL

Scientific Conference (2018, February 23)

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See detailLa référence à l’Alsace-Lorraine dans le rattachement et l’intégration d’Eupen-Malmedy à la Belgique (1918-1925)
Brüll, Christoph UL

Scientific Conference (2018, February 09)

En novembre 1910, le Journal des Tribunaux, principal organe d’information des juristes belges, qualifie la partie wallonne du Kreis allemand de Malmedy de « notre Alsace-Lorraine » où se trouveraient des ... [more ▼]

En novembre 1910, le Journal des Tribunaux, principal organe d’information des juristes belges, qualifie la partie wallonne du Kreis allemand de Malmedy de « notre Alsace-Lorraine » où se trouveraient des « frères de race et de langue, exilés et emprisonnés en Prusse. » Le 20 septembre 1920, ce Kreis ainsi que celui d’Eupen, presque exclusivement germanophone, sont rattachés à la Belgique, suite au traité de Versailles et à un simulacre de consultation populaire. Dans notre contribution qui traitera de la période qui s’étend de l’occupation de la région par des troupes belges en août 1919 à la fin du régime transitoire en mars 1925, nous voudrions nous interroger sur la signification de la référence à l’Alsace-Lorraine pendant cette phase du changement de la nationalité. Des indices donnent à penser que cette référence n’est pas limitée aux discours de légitimation de l’annexion du territoire par la Belgique, mais que les autorités belges ont, à certaines occasions (comme l’introduction du service militaire), contacté leurs homologues français afin de connaître la politique d’intégration menée en Alsace-Lorraine. En revanche, il n’y a jamais eu d’étude systématique de cette référence idéelle et pratique. Notre proposition voudrait combler cette lacune et constituerait également une contribution à une histoire comparée de la transition étatique dans les deux territoires. [less ▲]

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See detailSimulation-Based Fault Injection as a Verification Oracle for the Engineering of Time-Triggered Ethernet networks
Fejoz, Loïc; Regnier, Bruno; Miramont, Philippe et al

Scientific Conference (2018, February 02)

TTEthernet (TTE) is considered for use as high-speed backbone in the avionics of next-generation orbital space launchers. Given the key role of communication in launchers, the OEM must acquire a precise ... [more ▼]

TTEthernet (TTE) is considered for use as high-speed backbone in the avionics of next-generation orbital space launchers. Given the key role of communication in launchers, the OEM must acquire a precise understanding of TTE’s functioning and its performances in nominal and error conditions. This holds especially true for the clock synchronization algorithm, the cornerstone of time-triggered communication in TTE, which involves complex distributed algorithms. In this study, we use both an experimental platform and fault-injection on a simulation model to gain quantified insights in these questions. We first describe a fine-grained simulation model of TTE model and discuss how it has been validated against communication traces recorded on the TTE platform. We then present experiments that evaluate the accuracy of the clock synchronization in TTE in the fault-free case as well as considering permanent link failure and transient transmission errors. Finally, we discuss what we have learned during the project in terms of development process and programming language support for complex simulation models used in the design of critical systems. [less ▲]

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See detailInsights on the Performance and Configuration of AVB and TSN in Automotive Ethernet Networks
Migge, Jörn; Villanueva, Josetxo; Navet, Nicolas UL et al

Scientific Conference (2018, February 02)

Switched Ethernet is profoundly reshaping in-car communications. To meet the diverse real-time requirements in automotive communications, Quality-of-Service protocols that go beyond the mere use of ... [more ▼]

Switched Ethernet is profoundly reshaping in-car communications. To meet the diverse real-time requirements in automotive communications, Quality-of-Service protocols that go beyond the mere use of priorities are required. In this work, the basic questions that we investigate on a case-study with diverse and demanding communication requirements is what can we expect from the various protocols aimed at providing a better timing Quality of Service on top of Ethernet? And how to use them? Especially how to use them in a combined manner. We will focus on the Credit-Based Shaper of AVB, the Time-Aware Shaper of TSN and the use of priorities as defined in IEEE802.1Q. The performance metrics considered are the distributions of the communication latencies, obtained by simulation, as well as upper bounds on these quantities obtained by worst-case schedulability analysis. If there have been over the last 5 years numerous studies on the performance of AVB CBS, the literature on comparing AVB to TSN and other candidate protocols is still sparse. To the best of our knowledge, this empirical study is the first to consider most protocols currently considered in the automotive domain, with the aim to gain insights into the different technological, design and configurations alternatives. In particular, an objective of this study is to identify key problems that need to be solved in order to further automate network design and configuration. [less ▲]

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See detailSurmonter les barrières linguistiques avec « MaGrid » - un outil de formation de pré-mathématiques pour un contexte scolaire multilingue
Cornu, Véronique UL; Pazouki, Tahereh UL; Schiltz, Christine UL et al

Scientific Conference (2018, January 11)

Le contexte scolaire luxembourgeois est caractérisé par le multilinguisme et une population scolaire hétérogène, ce qui nécessite la mise en place de pratiques pédagogiques qui prennent en compte ... [more ▼]

Le contexte scolaire luxembourgeois est caractérisé par le multilinguisme et une population scolaire hétérogène, ce qui nécessite la mise en place de pratiques pédagogiques qui prennent en compte l’hétérogénéité des élèves. Dans le domaine des mathématiques, qui semble être non-verbal à première vue, des résultats scientifiques montrent que les enfants dont la langue maternelle est différente de la langue d’instruction, atteignent sur des tests d’aptitudes pré-mathématiques des résultats significativement inférieurs à ceux de leurs camarades natifs. Ceci est d’autant plus inquiétant, sachant que ces aptitudes pré-mathématiques sont prédictives des apprentissages ultérieurs. Par conséquent, nous avons développé l’outil de formation de pré-mathématiques non-verbale « MaGrid ». « MaGrid » permet à chaque enfant de bénéficier pleinement d’une instruction préscolaire en mathématiques, indépendamment de ses compétences langagières. Cet outil se caractérise par sa nature visuelle et il est implémenté sur tablette tactile. Jusqu’à présent, nous avons implémenté et évalué « MaGrid » lors de deux études scientifiques. Les résultats quantitatifs des évaluations empiriques sont prometteurs, comme ils montrent des effets positifs sur les habilités entraînées chez les enfants ayant utilisé cet outil comparé à un groupe contrôle. Dans une première étude, l’outil a été utilisé auprès de cinq classes durant 10 semaines, comprenant deux séances de 20 minutes par semaine. Les résultats lors de petites épreuves spécifiques ont été comparés aux résultats d’élèves de cinq classes n’ayant pas d’entraînement spécifique, et des effets d’intervention ont été observés. Dans une deuxième étude, nous nous sommes focalisés sur un groupe d’enfants de langue minoritaire (le portugais). « MaGrid » a été utilisé lors d’un programme d’intervention de pré-mathématiques s’étendant sur les deux années scolaires de l’école préscolaire. Les analyses préliminaires ont abouti à des résultats positifs. Des effets bénéfiques se sont manifestés sur différentes mesures de pré-mathématiques chez les enfants ayant suivi notre programme par rapport aux enfants du groupe contrôle. [less ▲]

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See detailUn outil sur tablette tactile facilitant l'autuévaluation à l'école primaire
Villanyi, Denise UL; Martin, Romain UL; Sonnleitner, Philipp UL et al

Scientific Conference (2018, January 11)

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See detailEvaluation à l’ère du numérique: continuité ou rupture?
Reuter, Bob UL; Meyers, Christian UL; Busana, Gilbert UL

Scientific Conference (2018, January 10)

Face aux nouveaux défis qui se posent à la société-monde du 21e siècle, les « techno-prophètes » présagent que la numérisation nous aidera à améliorer l’éducation des futures générations (Dräger & Müller ... [more ▼]

Face aux nouveaux défis qui se posent à la société-monde du 21e siècle, les « techno-prophètes » présagent que la numérisation nous aidera à améliorer l’éducation des futures générations (Dräger & Müller-Eiselt, 2015 ; Khan, 2013 ; Cuban, 2003). L’évaluation des apprentissages assistée par ordinateur deviendrait notamment plus efficiente, plus pratique, plus flexible, plus rapide, plus objective, plus accessible, plus sécurisée, plus juste et plus économe. Par contre celle-ci reste souvent dans la continuité de pratiques existantes (Substitution ou Augmentation dans le modèle SAMR de Ruben Puentedura, 2006), donc limitée à la reproduction de connaissances déclaratives et de procédures fixes. Les ordinateurs sont en effet mieux aptes à rapidement corriger les réponses des apprenants à des tests standardisés et fermés. De plus, pour nous la révolution numérique incarne plus un grand défi qu’une solution miracle pour l’évaluation des apprentissages (scolaires ou autres). En effet, dans un monde où la numérisation mène à une croissance exponentielle et à une diffusion ultra-rapide des informations et à leur accès de plus en plus libre et facile, il ne suffit plus d’accumuler des connaissances, ni de simplement les reproduire. Mais il faut être capable de savoir où aller chercher des informations, comment juger leur crédibilité et utilité et comment les utiliser pour résoudre des problèmes. L’évaluation des apprentissages ne pourra donc plus se limiter à mesurer la capacité des élèves à mémoriser et à reproduire des informations mais devra s’aligner sur les nouveaux objectifs d’une éducation préparant les futures générations à affronter les défis d’un monde globalisé et connecté (cf. modèle des 21st century skills; Trilling & Fadel, 2009). La question fondamentale qui se posera pour l’évaluation des apprentissages sera celle de savoir comment évaluer des compétences (savoir, savoir-faire et savoir-être) complexes, dynamiques et changeantes. La question de l’utilisation des technologies numériques à des fins d’évaluation nous semble donc secondaire par rapport à la question de la transformation de l’évaluation afin qu’elle nous permette de répondre aux défis de la révolution civilisationnelle provoquée par la présence des technologies numériques et leur expansion irrémédiable dans nos pratiques culturelles, sociales, économiques, politiques et pédagogiques quotidiennes. Dans cette communication nous ne viserons pas nécessairement à fournir des réponses toutes faites, mais à stimuler le débat sur les relations mutuelles entre révolution numérique et évaluation en milieu scolaire, en termes d’innovations évolutives ou disruptives (Christensen, Johnson & Horn, 2008). [less ▲]

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See detailFaut-il lire, et que faut-il lire, pour mieux savoir lire?
Reichert, Monique UL; Krämer, Charlotte UL; Rivas, Salvador UL et al

Scientific Conference (2018, January)

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See detailModéliser la « valeur ajoutée » en éducation primaire et secondaire : 674 publications en revue
Levy, Jessica UL; Gamo, Sylvie UL; Keller, Ulrich UL et al

Scientific Conference (2018, January)

L’approche statistique du type de « valeur ajoutée » (« value added ») a comme but de quantifier l’effet des acteurs pédagogiques sur la performance des élèves, indépendamment de leur origine (p. ex ... [more ▼]

L’approche statistique du type de « valeur ajoutée » (« value added ») a comme but de quantifier l’effet des acteurs pédagogiques sur la performance des élèves, indépendamment de leur origine (p. ex. Braun, 2005), c’est-à-dire de déterminer la valeur dans la performance de l’élève du fait qu’il étudie avec tel professeur ou /et qu’il soit dans telle école. Ces indices de valeur ajoutée une fois déterminés sont souvent utilisés pour prendre des décisions de reddition de compte (« accountability » ; p.ex. Sanders, 2000) L’idée est de faire une évaluation standardisée de la qualité des enseignants ou des écoles à travers l’évolution des résultats des élèves. Même si les valeurs ajoutées sont devenues plus populaires durant ces dernières années, il n’y a pas de consensus concernant la méthode pour les calculer, ni sur l’intégration de variables explicatives (p. ex. Newton et al., 2010). Le but de notre étude est de faire une revue de littérature concernant les valeurs ajoutées en éducation primaire et secondaire. Pour ce faire, nous avons utilisé les bases de données ERIC, Scopus, PsycINFO et Psyndex et nous avons analysé et classifié rigoureusement 674 études de 32 pays différents. La moitié des études recensées concerne les valeurs ajoutées au niveau des enseignants et les autres concernent celles au niveau des écoles ou directeurs. 370 études ont utilisé des données empiriques pour calculer des indices de valeur ajoutée. Dans un certain nombre d’études, les variables utilisées sont précisées, mais dans approximativement 15% des publications, le modèle statistique utilisé n’est pas spécifié. La plupart des études ont utilisé la performance des années précédentes des élèves comme prédicteur ; en revanche, des variables cognitives ou motivationnelles des élèves n’ont presque jamais été prises en considération. Cette revue de littérature permet de souligner, en vue des enjeux politiques importants des valeurs ajoutées, qu’il est nécessaire d’avoir plus de transparence, rigueur et consensus, surtout sur le plan méthodologique. [less ▲]

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See detailÉvaluations numériques: quel rôle pour l’expérience utilisateur ?
Pere, Maxime UL; Lallemand, Carine UL; Koenig, Vincent UL

Scientific Conference (2018, January)

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See detailNew mechanical model to predict the load bearing resistance of shear connectors with modern forms of profiled sheeting
Odenbreit, Christoph UL; Vigneri, Valentino UL; Amadio, Claudio et al

Scientific Conference (2018)

The rules in EN1994-1-1 concerning the resistance of shear connections in composite beams with headed shear studs and steel sheeting relies on push-out tests, which have been performed between the late ... [more ▼]

The rules in EN1994-1-1 concerning the resistance of shear connections in composite beams with headed shear studs and steel sheeting relies on push-out tests, which have been performed between the late seventies and the early nineties of the last century. In the recent years, new geometries of metal decking have appeared on the market with the target to reduce the volume and weight of the concrete slab and to maximise the slab efficiency. The influence of these new geometries on the load bearing behaviour of shear connections has to be verified. Amongst others, the RFCS research project DISCCO investigated the shear stud resistance in combination with such novel steel decking. It turned out that, the current EN 1994-1-1 rules need to be modified especially for metal decking with narrow and deep deck ribs. Alternative analytical equations for the estimation of the shear resistance have been derived and statistically evaluated according to EN 1990. Details are presented in this contribution. [less ▲]

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See detailAn elementary proof of the formal rigidity of the Witt and Virasoro algebra
Schlichenmaier, Martin UL

Scientific Conference (2017, December 19)

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See detailThe Empirical Saddlepoint Estimator
Holcblat, Benjamin UL; Sowell, Fallaw

Scientific Conference (2017, December 17)

Previous studies have shown that existing moment-based estimation approaches have poor small-sample performance in some applications. We propose an alternative that is based on the ESP (empirical ... [more ▼]

Previous studies have shown that existing moment-based estimation approaches have poor small-sample performance in some applications. We propose an alternative that is based on the ESP (empirical saddlepoint) approximation of the solutions to the empirical moment conditions. Saddlepoint approximations are known to perform well in small sample. The novel estimator proposed, which we call the ESP estimator, is the mode of the ESP approximation. We show that it is consistent and asymptotically normal, and we study its higher-order bias. We propose novel test statistics based on the ESP estimator. Finally, we also investigate the finite-sample properties of the ESP estimator and related test statistics through Monte-Carlo simulations. [less ▲]

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See detailThe Missing Risk Premium in Exchange Rates
Penasse, Julien UL

Scientific Conference (2017, December 15)

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See detailHealth Behaviour in School-aged Children - Studienergebnisse der HBSC-Erhebung 2014
Heinz, Andreas UL

Scientific Conference (2017, December 13)

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See detailZugangsbarrieren im Gesundheitssystem - Ein Ländervergleich
Heinz, Andreas UL

Scientific Conference (2017, December 08)

In der international vergleichenden Forschung zu Gesundheitssystemen spielt der Zugang zu Gesundheitsleistungen eine zentrale Rolle. Entsprechende Typologien klassifizieren Gesundheitssysteme u.a. danach ... [more ▼]

In der international vergleichenden Forschung zu Gesundheitssystemen spielt der Zugang zu Gesundheitsleistungen eine zentrale Rolle. Entsprechende Typologien klassifizieren Gesundheitssysteme u.a. danach, ob Patienten Zuzahlungen leisten müssen, ob sie sich bei Hausärzten einschreiben müssen und nach welchen Regeln sie einen Facharzt konsultieren können (z.B. Reibling 2010, Wendt 2009, Böhm et al 2013). In der Typologie von Wendt gehört Österreich zum „Health service provision-oriented type“, der fast der gesamten Bevölkerung einen einfachen Zugang zu Gesundheitsleistungen bei geringen Zuzahlungen und freier Arztwahl ermöglicht (2009). Diese Typologien basieren jedoch auf den gesetzlichen Zugangsregeln in einem Land, nicht auf den subjektiven Erfahrungen der Bevölkerung mit Zugangsbarrieren. Im aktuellen European Social Survey (ESS) wurde nach diesen Barrieren gefragt: Haben Befragte medizinische Behandlungen nicht bekommen und was waren die Gründe (z.B. Kosten, Behandlung nicht erhältlich, Warteliste zu lang)? Der Vortrag stellt die Ergebnisse des ESS vor und geht auf folgende Fragen ein: • Wie häufig stoßen Kranke in Österreich und in anderen europäischen Ländern auf Zugangsbarrieren? • Welche Personen in Österreich sind besonders von Zugangsbarrieren betroffen? Die vorläufigen Ergebnisse deuten darauf hin, dass es durchaus nennenswerte Zugangsbarrieren im Gesundheitssystem Österreichs gibt und dass ohnehin benachteiligte Personen häufiger als andere auf Zugangsbarrieren stoßen. Für die wissenschaftliche Theorie stellt sich die Frage, ob die gängigen Typologien von Gesundheitssystemen um die subjektiven Erfahrungen ergänzt werden müssen. Für die Praxis stellt sich die Frage, wie schädlich Zugangsbarrieren sind und wie sie abgebaut werden können. [less ▲]

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See detailBlockchain Technology - Arsenal for a Shariah-Compliant Financial Ecosystem
Lacasse, Rcihard-Marc; Lambert, Berthe; Khan, Nida UL

Scientific Conference (2017, December 05)

The authors’ first challenge is to decipher the complexity of Islamic Finance despite the opacity of the sector. A second focal point is the agent’s agenda; in the Islamic Finance industry, contributors ... [more ▼]

The authors’ first challenge is to decipher the complexity of Islamic Finance despite the opacity of the sector. A second focal point is the agent’s agenda; in the Islamic Finance industry, contributors mandate intermediaries (agents) to transfer their contributions to social causes according to the Shariah; in principle, Islamic financial institutions must create value for their stakeholders by offering Shariah-compliant products and services. An underlying assumption of agency theory is that agents attempt to maximize their personal welfare and compensation, but such behaviour may not always be in the best interests of other stakeholders, and an analysis of the agent’s agenda can help explain how agents can fall off the pedestal of altruism. Relationships between Islamic banks and three key stakeholders (contributors, beneficiaries and regulators) are also explored via a complexity-aware monitoring process. Contributors provide funds to an Islamic bank (agent), and in return, the agent should be accountable to the contributors, but the form and degree of accountability can vary depending on the organization’s mission. There are many unanswered questions regarding the monitoring process. One objective of the article is to consider whether agents act in the best interests of the stakeholders. Finally, the authors explore the following question: Can blockchain technology and smart contracts support and enhance the transparency feature, which is the core underlying principle of all transactions in the Islamic Finance industry? A qualitative research framework was adopted because of the constraints of the enigmatic, secretive Islamic Finance culture. [less ▲]

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See detailPreparing Future Teachers for Strategic Uses of Educational Technology: A Project-Based Approach
Reuter, Bob UL; Busana, Gilbert UL

Scientific Conference (2017, December 01)

Given (1) the need for teachers who are willing and able to design, implement and reflect meaningful and successful educational technology practices in schools and (2) the current rarity of strategic uses ... [more ▼]

Given (1) the need for teachers who are willing and able to design, implement and reflect meaningful and successful educational technology practices in schools and (2) the current rarity of strategic uses of ICT in education in Luxembourgish schools, the self-declared lack of competencies and the low confidence of teachers when it comes to teaching with ICT (Reuter, Busana & Linckels, 2016), we have designed, implemented and tested a project-based approach to the development of practice- oriented TPACK in pre-service teachers. Future teacher students are instructed to define an educational problem they want to solve, to explore existing pedagogical and technological solutions and to design an original solution that involves the strategic use of ICT (theoretically grounded and practically meaningful). They then have to implement the designed learning & teaching scenario in a classroom, to document the teaching & learning processes, to analyse, evaluate and to critically reflect them. Finally, they are required to write a structured report about their project and to present it to their peers and to interested teachers from schools. Overall, we observe that while most students become able to design and implement relatively meaningful educational technology practices, they still tend to feel that they are not ready to teach with technology in a more general sense, because their work was focused on one or two tools and does not give them access to a broader range of meaningful ICT-enriched teaching scenarios for their later professional career. [less ▲]

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See detailOntologically stepping-up: A model for refugee entrepreneurship
Heilbrunn, Sibylle; Iannone, Rosa Lisa UL

Scientific Conference (2017, December 01)

This paper is a first attempt at proposing an integrated conceptual model that would bridge this gap in our knowledge of refugee entrepreneurship. Such a model might then enable for the understanding of ... [more ▼]

This paper is a first attempt at proposing an integrated conceptual model that would bridge this gap in our knowledge of refugee entrepreneurship. Such a model might then enable for the understanding of the super-diverse entrepreneurial strategies being employed by super-diverse refugees, within complex and super-diverse socio-economic and political settings – thereby, ontologically stepping-up our theoretical approaches and empirical insights into the phenomenon. [less ▲]

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See detailFacing the Safety-Security Gap in RTES: the Challenge of Timeliness
Volp, Marcus UL; Kozhaya, David UL; Verissimo, Paulo UL

Scientific Conference (2017, December)

Safety-critical real-time systems, including real-time cyber-physical and industrial control systems, need not be solely correct but also timely. Untimely (stale) results may have severe consequences that ... [more ▼]

Safety-critical real-time systems, including real-time cyber-physical and industrial control systems, need not be solely correct but also timely. Untimely (stale) results may have severe consequences that could render the control system’s behaviour hazardous to the physical world. To ensure predictability and timeliness, developers follow a rigorous process, which essentially ensures real-time properties a priori, in all but the most unlikely combinations of circumstances. However, we have seen the complexity of both real-time applications, and the environments they run on, increase. If this is matched with the also increasing sophistication of attacks mounted to RTES systems, the case for ensuring both safety and security through aprioristic predictability loses traction, and presents an opportunity, which we take in this paper, for discussing current practices of critical realtime system design. To this end, with a slant on low-level task scheduling, we first investigate the challenges and opportunities for anticipating successful attacks on real-time systems. Then, we propose ways for adapting traditional fault- and intrusiontolerant mechanisms to tolerate such hazards. We found that tasks which typically execute as analyzed under accidental faults, may exhibit fundamentally different behavior when compromised by malicious attacks, even with interference enforcement in place. [less ▲]

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See detailValue-Added Modelling in Primary and Secondary School: An Integrative Review of 674 Publications
Levy, Jessica UL; Keller, Ulrich UL; Brunner, Martin et al

Scientific Conference (2017, December)

Value-added (VA) modelling aims to quantify the effect of pedagogical actions on students’ achievement, independent of students’ backgrounds (e.g., [1]); in other words, VA strives to model the added ... [more ▼]

Value-added (VA) modelling aims to quantify the effect of pedagogical actions on students’ achievement, independent of students’ backgrounds (e.g., [1]); in other words, VA strives to model the added value of teaching. VA is typically used for teacher and/or school accountability (e.g., [2]). Although, VA models have gained popularity in recent years—a substantial increase of publications is to be observed over the last decade—, there is no consensus on how to calculate VA, nor is there a consensus whether and which covariates should be included in the statistical models (e.g., [3]). The aim of the present study is to conduct a to date non-existent integrative review on VA modelling in primary and secondary education. Starting with an exhaustive literature research in the ERIC, Scopus, PsycINFO, and Psyndex databases, we reviewed and thoroughly classified 674 VA publications from 32 different countries. Half of the studies investigated VA models at teacher level; the remaining looked at school or principal level. 370 studies used empirical data to calculate VA models. Most of these studies explained their covariates, but approximately 15% did not specify the model. Most studies used prior achievement as a covariate, but cognitive and/or motivational student data were almost never taken into consideration. Moreover, most of the studies did not adjust for methodological issues such as missing data or measurement error. To conclude, given the high relevance of VA—it is primarily used for high-stakes decisions— more transparency, rigor and consensus are needed, especially concerning methodological details. References [1] Braun, H. I. (2005). Using student progress to evaluate teachers: A primer on value-added models. Princeton, NJ: Educational Testing Service. [2] Sanders, W. L. (2000). Value-added assessment from student achievement data: Opportunities and hurdles. Journal of Personnel Evaluation in Education, 14(4), 329–339. [3] Newton, X., Darling-Hammond, L., Haertel, E., & Thomas, E. (2010). Value-added modeling of teacher effectiveness: An exploration of stability across models and contexts. Education Policy Analysis Archives, 18(23). [less ▲]

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See detailProbabilistic Analysis of Low-Criticality Execution
Küttler, Martin; Roitzsch, Michael; Hamann, Claude-Joachim et al

Scientific Conference (2017, December)

The mixed-criticality toolbox promises system architects a powerful framework for consolidating real-time tasks with different safety properties on a single computing platform. Thanks to the research ... [more ▼]

The mixed-criticality toolbox promises system architects a powerful framework for consolidating real-time tasks with different safety properties on a single computing platform. Thanks to the research efforts in the mixed-criticality field, guarantees provided to the highest criticality level are well understood. However, lower-criticality job execution depends on the condition that all high-criticality jobs complete within their more optimistic low-criticality execution time bounds. Otherwise, no guarantees are made. In this paper, we add to the mixed-criticality toolbox by providing a probabilistic analysis method for low-criticality tasks. While deterministic models reduce task behavior to constant numbers, probabilistic analysis captures varying runtime behavior. We introduce a novel algorithmic approach for probabilistic timing analysis, which we call symbolic scheduling. For restricted task sets, we also present an analytical solution. We use this method to calculate per-job success probabilities for low-criticality tasks, in order to quantify, how low-criticality tasks behave in case of high-criticality jobs overrunning their optimistic low-criticality reservation. [less ▲]

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See detailOn Partial-Sum Processes of ARMAX Residuals
Holcblat, Benjamin UL; Gronneberg, Steffen

Scientific Conference (2017, December)

General and versatile results are established regarding the limit behavior of the partial-sum process of ARMAX residuals. Illustrations include ARMA with seasonal dummies, misspecified ARMAX models with ... [more ▼]

General and versatile results are established regarding the limit behavior of the partial-sum process of ARMAX residuals. Illustrations include ARMA with seasonal dummies, misspecified ARMAX models with autocorrelated errors, nonlinear ARMAX models, ARMA with a structural break, a wide range of ARMAX models with infinite-variance errors, weak GARCH models and the consistency of kernel estimation of the density of ARMAX errors. Our results identify the limit distributions, and provide a general algorithm to obtain pivot statistics for CUSUM tests. [less ▲]

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See detailThe Time-Varying Risk of Macroeconomic Disasters
Penasse, Julien UL

Scientific Conference (2017, December)

Detailed reference viewed: 10 (0 UL)
See detailInnovative approaches for microfinance for youth
Leist, Anja UL; Chapet, Jérémie; Szelest, Linda

Scientific Conference (2017, November 28)

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See detailDemo: MAMBA: A Platform for Personalised Multimodal Trip Planning
Faye, Sébastien UL; Cantelmo, Guido UL; Tahirou, Ibrahim UL et al

Scientific Conference (2017, November 27)

In recent years, multimodal transportation has become a challenging approach to route planning. Most existing planning systems usually rely on data sourced from different organisations, enabling the user ... [more ▼]

In recent years, multimodal transportation has become a challenging approach to route planning. Most existing planning systems usually rely on data sourced from different organisations, enabling the user to select a limited number of routing strategies. As part of the MAMBA project, developed in Luxembourg until 2017, we have been interested in the potential benefits of multimodal mobility systems. A key factor has been integrated into our studies: the need for a personalised experience at user level, whether when selecting the means of transport or describing user habits (e.g. route style, environment). In this context, we have developed a platform for planning personalised multimodal trips, broken down into the three main modules presented in this demonstration. More importantly, this platform has been developed to facilitate the daily mobility of people in Luxembourg, and considers datasets and characteristics that are specific to this region, which has an exceptionally high volume of daily commuting between Luxembourg and neighbouring countries. [less ▲]

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See detailSome naturally defined star products for Kaehler manifolds
Schlichenmaier, Martin UL

Scientific Conference (2017, November 27)

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See detailLaw and the software development life cycle
Bartolini, Cesare UL; Lenzini, Gabriele UL

Scientific Conference (2017, November 25)

The increasing demand of reliable software services and the dependability that our daily personal and professional life have on them is bringing significant changes in the domain of software service ... [more ▼]

The increasing demand of reliable software services and the dependability that our daily personal and professional life have on them is bringing significant changes in the domain of software service engineering. One of the most revolutionary is the introduction of regulations, repeating what in the past has concerned the product market. Regulations need to find a balance between the interests of several roles and reduce the inevitable tensions that would otherwise arise among them, as well as to defend the right of the weakest parties (normally the end users). There are multiple interests to balance: the interests of end users, the protection of intellectual property, a fair competition against other enterprises, just to name a few. While some of these requirements concern the structure and organization of the enterprise, some of them are fit to penetrate into the software development life cycle. This would serve multiple purposes: allow the enterprise to design services which already take the legal requirements into account; visually represent the requirements and their interaction with the functionality of the system; develop the software components using tools and methodologies that are able to deal with those requirements; define metrics to measure the degree to which such requirements are met; measure the impact of the requirements on the functionality of the service and on other parameters of the service (such as performance or storage occupation); verify and monitor whether the legal requirements are met; and, last but not least, to have an argument to be used in case of a complaint in a court or at a competent authority. Before being considered in the software service life cycle, legal requirements must undergo a preprocessing phase in which they are translated into some form which is compatible with the tools and methodologies proper of the software engineering, for instance being modelled into a formalism that makes them processable by a machine. There is a significant amount of interdisciplinary topics that need to be combined together to reach an integration between regulation and software life cycle. In particular, at least from three complementary perspectives are needed. One perspective requires the analysis of the provisions of the law, the extraction of the legal requirements classified according to the stakeholders affected, and the translation of those requirements into some formal model that can be processed using appropriate software tools. A second perspective requires a study of the legal requirements from the point of view of requirements engineering techniques, also defining metrics to measure them. The third concerns the models used in the various stages of software engineering (design, modeling, development, validation and testing), which need to be extended to accommodate the legal requirements in their formal representation. Only by putting together these perspectives a comprehensive approach to deal with legal requirements in software engineering is possible. [less ▲]

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See detailWorking conditions and work-related anger: A longitudinal perspective
Steffgen, Georges UL; Sischka, Philipp UL

Scientific Conference (2017, November 24)

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See detailConfronting corpora with coursebooks: the case of lecture listening
Deroey, Katrien UL

Scientific Conference (2017, November 23)

This paper confronts language use in the British Academic Spoken English (BASE) corpus with the representation of lectures in 25 listening coursebooks (Deroey, submitted; Deroey, 2017). Following key ... [more ▼]

This paper confronts language use in the British Academic Spoken English (BASE) corpus with the representation of lectures in 25 listening coursebooks (Deroey, submitted; Deroey, 2017). Following key tenets such as authenticity, specificity and needs analysis, English for Academic Purposes (EAP) materials development should be guided by an understanding of target genres and their communicative demands. Yet, lecture listening coursebooks have often been criticised for their lack of realistic lecture models (e.g. Alexander, Argent, & Spencer, 2008; Field, 2011; Thompson, 2003). The aspects of representativeness examined in these coursebooks are language, lecture authenticity and research-informedness. To assess the representativeness of language, signposts of important points are compared with those retrieved from the BASE corpus of 160 authentic lectures (Deroey, submitted; Deroey and Taverniers, 2012). The coursebook lectures are also analysed in terms of their source, delivery and length. The materials are further reviewed for their use of findings from research into listening comprehension and lecture discourse. Results suggest that current lecture listening materials often do not reflect the language and lectures students are likely to encounter on their degree programmes. Moreover, materials are typically not (systematically) informed by listening and lecture discourse research. These findings highlight the need for EAP practitioners to approach published materials critically and supplement or modify them in ways that would better serve students. References Alexander, O., Argent, S., & Spencer, J. (2008). EAP Essentials: a teacher’s guide to principles and practice. Reading: Garnet. Deroey, K. L. B. (submitted). The representativeness of lecture listening coursebooks: language, lectures, research-informedness. Deroey, K. L. B. (2017). How representative are EAP listening books of real lectures? . In J. Kemp (Ed.), Proceedings of the 2015 BALEAP Conference. EAP in a rapidly changing landscape: Issues, challenges and solutions. Reading: Garnet. Deroey, K. L. B., & Taverniers, M. (2012). Just remember this: Lexicogrammatical relevance markers in lectures. English for Specific Purposes, 31(4), 221-233.  Field, J. (2011). Into the mind of the academic listener. Journal of English for Academic Purposes, 10(2), 102-112.  Thompson, S. E. (2003). Text-structuring metadiscourse, intonation and the signalling of organisation in academic lectures. Journal of English for Academic Purposes, 2(1), 5-20.  [less ▲]

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See detailLa frontière, un défi pour l'enseignement des cours de langues (étrangères)?
Ehrhart, Sabine UL

Scientific Conference (2017, November 23)

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See detailMobilités transfrontalières et développement économique et social des territoires frontaliers : l'exemple du nord d ela Lorraine
Pigeron-Piroth, Isabelle UL; Belkacem, Rachid; Clément, Franz

Scientific Conference (2017, November 23)

Par leur ampleur, mais aussi leur pérennité, les mobilités transfrontalières au sein de la Grande Région SaarLorLux ne sont pas sans effets sur les dynamiques territoriales. Au Luxembourg, vers lequel ... [more ▼]

Par leur ampleur, mais aussi leur pérennité, les mobilités transfrontalières au sein de la Grande Région SaarLorLux ne sont pas sans effets sur les dynamiques territoriales. Au Luxembourg, vers lequel converge une grande partie des flux de travailleurs, le phénomène frontalier a des conséquences multiples (sur la consommation, les pratiques linguistiques, les transports, l’immobilier….). Le travail frontalier a également des impacts sur les régions de provenance des travailleurs . Il est devenu un important ressort de la dynamique économique et sociale de ces espaces géographiques. Sur un plan économique, il contribue à l’ajustement aussi bien quantitatif que qualitatif entre besoins en ressources humaines et besoins de production. Il est aussi à l’origine de nombreuses autres formes de mobilités (mobilités résidentielles, de consommation, de loisirs….) qui contribuent à dynamiser aussi bien les territoires d’emploi que de résidence. L’hypothèse que nous formulons est que le développement du travail frontalier impacte les trajectoires de développement économique et social des territoires frontaliers, particulièrement des territoires de résidence de ces travailleurs. Quelles sont les nouvelles activités structurantes du territoire en rupture avec le passé industriel (comme par exemple au nord de la Lorraine) ? Cette question a du sens dans un contexte où le travail frontalier est ancré dans les économies locales. En Lorraine, 10% de la population active occupée a son emploi de l’autre côté des frontières. A proximité directe des frontières, ce pourcentage augmente. Le travail frontalier concerne par exemple la moitié des actifs occupés habitant la zone d’emploi de Longwy. Notre proposition se focalisera sur cette zone d’emploi située au nord de la Lorraine, frontalière à la fois du Luxembourg et de la Belgique. Le choix de ce territoire s’explique surtout par les ruptures importantes de la structure économique et sociale locale avec l’activité industrielle passée de ce territoire et par l’ampleur des restructurations du système productif local. [less ▲]

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See detailMarkers of lesser importance in lecture discourse
Deroey, Katrien UL

Scientific Conference (2017, November 22)

This paper surveys how less important lecture discourse is marked lexicogrammatically in the British Academic Spoken English (BASE) corpus (Deroey and Taverniers, 2012; Deroey, 2014). Such interpersonal ... [more ▼]

This paper surveys how less important lecture discourse is marked lexicogrammatically in the British Academic Spoken English (BASE) corpus (Deroey and Taverniers, 2012; Deroey, 2014). Such interpersonal, metadiscursive devices combine discourse organization with evaluation along a ‘parameter of importance or relevance’ (Thompson and Hunston, 2000: 24). They can help students discern the relative importance of points and so may aid lecture comprehension, note-taking and retention. The markers were first retrieved manually from 40 lectures and then using Sketch Engine from all 160 lectures. They fell into five categories: (i) message status markers (e.g. not pertinent, joke, anyway); (ii) topic treatment markers (e.g. briefly, not look at, for a moment); (iii) lecturer knowledge markers (e.g. not know, not remember); (iv) assessment markers (e.g. not examine, not learn); and (v) attention- and note-taking markers (e.g. ignore, not copy down). This study illustrates the challenge of identifying and quantifying pragmatic features in academic discourse. Few markers explicitly evaluated discourse as being unimportant (e.g. not pertinent) and few had an inherent meaning of lesser importance (e.g. incidentally). Instead, they depended rather heavily on pragmatic interpretation to achieve their effect and could generally be viewed as ‘muted signals’ (Swales and Burke, 2003: 17), expressing importance implicitly or cumulatively (cf. Hunston, 2011). Hence, Hunston’s observation that ‘much evaluative meaning is not obviously identifiable, as it appears to depend on immediate context and on reader assumptions about value’ (2004: 157) is particularly pertinent here. References Deroey, K. L. B. (2014). ‘Anyway, the point I'm making is’: Lexicogrammatical relevance marking in lectures. In L. Vandelanotte, D. Kristin, G. Caroline, & K. Ditte (Eds.), Recent Advances in Corpus Linguistics: Developing and Exploiting Corpora (pp. 265-291). Amsterdam/New York: Rodopi. Deroey, K. L. B., & Taverniers, M. (2012). ‘Ignore that' cause it's totally irrelevant’: Marking lesser relevance in lectures. Journal of Pragmatics, 44(14), 2085-2099. Hunston, S. (2004). Counting the uncountable: Problems of identifying evaluation in a text and in a corpus. In A. Partington, J. Morley, & L. Haarman (Eds.), Corpora and discourse (pp. 157-188). Bern: Peter Lang. Hunston, S. (2011). Corpus approaches to evaluation: phraseology and evaluative language (Vol. 13). New York: Routledge. Swales, J. M., & Burke, A. (2003). " Its really fascinating work": Differences in Evaluative Adjectives across Academic Registers. Language and Computers, 46(1), 1-18.  Thompson, G., & Hunston, S. (2000). Evaluation: An introduction. In Hunston, S., & Thompson, G. (Eds.), Evaluation in text: Authorial stance and the construction of discourse (pp. 1-27). Oxford: OUP. [less ▲]

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See detailKonventionen und Tabus? Deutschlandbilder in Lüttich im langen 19. Jahrhundert
Brüll, Christoph UL

Scientific Conference (2017, November 22)

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See detailDemystifying multilingualism at work, at home and at school
Kirsch, Claudine UL

Scientific Conference (2017, November 21)

What is multilingualism? How has our understanding of multilingualism, language learning and developing several languages in children at home and at school changed over the last century? Building on the ... [more ▼]

What is multilingualism? How has our understanding of multilingualism, language learning and developing several languages in children at home and at school changed over the last century? Building on the work of several leading scholars such as García, Creese and Blackledge, Li Wei, and Baker as well as on my own research, this interactive presentation will deconstruct traditional understandings of multilingualism and show that translanguaging, the use of one’s entire semiotic repertoire for communication, meaning-making and learning, is a normal practice. In addition, we will examine approaches such as “one-person-one-language” and “one-person-two-languages” and discuss some video excerpts illustrating how children use their multilingual repertoire in a crèche at and school. [less ▲]

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See detailEU citizens’ rights versus the Member States’ right to withdraw from the Union
Gerkrath, Jörg UL

Scientific Conference (2017, November 18)

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See detailConclusions
Pettiau, Hérold UL; Lemesle, Bruno; Lemaître, Nicole

Scientific Conference (2017, November 17)

This intervention consiste of concluding remarks of a conférence on the office of bishops as administrations of their diocèse within a region encompassing the Low Countries, dthe Duchy of Lorraine, the ... [more ▼]

This intervention consiste of concluding remarks of a conférence on the office of bishops as administrations of their diocèse within a region encompassing the Low Countries, dthe Duchy of Lorraine, the Alsace region, Switzelrand, south-Esastern France and the North of Italy, which were allegedly part of a sort of "catholic front" facing the Reformation. [less ▲]

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See detailAlternative Paths Towards Sustainable Localized Food Sovereignty. Convergence between Prosumers and Ethical Entrepreneurs over Time
Reckinger, Rachel UL

Scientific Conference (2017, November 14)

Recently, a number of resourceful community-driven initiatives for local food production and retail have arisen in Luxembourg, in a context of particularly low organic agricultural rates paradoxically ... [more ▼]

Recently, a number of resourceful community-driven initiatives for local food production and retail have arisen in Luxembourg, in a context of particularly low organic agricultural rates paradoxically paired with high consumer demands for organic produce, leading to a specific market of largely imported organic goods. As an encompassing reaction to this situation, a niche of social innovators are combining agro-ecological land use and food production with locavoracity and circular economy. Based on qualitative in-depth interviews and participant observation, we would like to expand on four micro-case studies of circular-economy-type fruit and vegetable production as well as unpackaged and/or socially responsible food retail in today’s Luxembourg. One has been established since the 1980s with over 150 employees, partly in social insertion measures, producing and importing organic fruits and vegetables, delivered via a classical box scheme system. Additionally, over the last three years three significantly smaller initiatives with higher citizen and/or community involvement have emerged. They are characterized by a cooperative governance structure, a claimed community-supported agricultural outlook, a more dynamic presence on social media and regular hands-on workshops and activities. These more recent initiatives are also more radical in their agro-ecological and/or permaculture practices, focusing on local production without relying on imports, as a politicized step further than mere (possibly industrialized) organic production, which is an altogether renewed enacting of circular economy precepts. Yet their position on the market is for the moment more fragile and marginal. Particularly, the retailers among them have to build creative consensus – according to specific priorities and stances – between their standards and the adjustment to consumers who, albeit sensitized, are in search for a certain variety and convenience. By focusing on heterodox experiences of more or less established alternative actors in diverse yet complementary food production and retail niches, we will explore topics such as emotional collective commitment and consensus-building, ethical entrepreneurship in relation to possibly reframed standards over time, governmentality, political enabling or disabling structures and regulations, as well as commodification and upscaling issues. Therefore, this paper touches on political processes and strategies, urban agro-ecological practices as well as post-capitalist economics. [less ▲]

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See detailAssociative and quasitrivial operations on finite sets (invited lecture)
Marichal, Jean-Luc UL; Couceiro, Miguel; Devillet, Jimmy UL

Scientific Conference (2017, November 10)

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Peer Reviewed
See detailTeaching languages in contact: the case of Luxembourg and Catalonia
Ehrhart, Sabine UL

Scientific Conference (2017, November 09)

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Peer Reviewed
See detailThe Missing Risk Premium in Exchange Rates
Penasse, Julien UL

Scientific Conference (2017, November 08)

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See detailThe Effects of Deskilling and Unemployment on Hiring Decisions
Samuel, Robin UL; Imdorf, Christian; Sacchi, Stefan et al

Scientific Conference (2017, November 08)

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See detailInsights on the performance and configuration of AVB and TSN in automotive applications
Navet, Nicolas UL; Villanueva, Josetxo; Migge, Jörn et al

Scientific Conference (2017, November 01)

Switched Ethernet is profoundly reshaping in-car communications. To meet the diverse real-time requirements in automotive communications, Quality-of-Service protocols that go beyond the mere use of ... [more ▼]

Switched Ethernet is profoundly reshaping in-car communications. To meet the diverse real-time requirements in automotive communications, Quality-of-Service protocols that go beyond the mere use of priorities are required. In this work, the basic questions that we investigate on a case-study with diverse and demanding communication requirements is what can we expect from the various protocols aimed at providing a better timing Quality of Service on top of Ethernet? And how to use them? Especially how to use them in a combined manner. We will focus on the Credit-Based Shaper of AVB, the Time-Aware Shaper of TSN and the use of priorities as defined in IEEE802.1Q. The performance metrics considered are the distributions of the communication latencies, obtained by simulation, as well as upper bounds on these quantities obtained by worst-case schedulability analysis. If there have been over the last 5 years numerous studies on the performance of AVB CBS, the literature on comparing AVB to TSN and other candidate protocols is still sparse. To the best of our knowledge, this empirical study is the first to consider most protocols currently considered in the automotive domain, with the aim to gain insights into the different technological, design and configurations alternatives. In particular, an objective of this study is to identify key problems that need to be solved in order to further automate network design and configuration. [less ▲]

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See detailThe homothetic scaling of urban land and density profiles: evidence from Europe
Caruso, Geoffrey UL; Lemoy, Rémi UL

Scientific Conference (2017, November)

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See detailHomothetic Scaling of Urban Land Use and Population Density Gradients in Monocentric Models
Delloye, Justin; Lemoy, Rémi UL; Caruso, Geoffrey UL

Scientific Conference (2017, November)

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See detailAdvanced Interest Flooding Attacks in Named-Data Networking
Signorello, Salvatore UL; Marchal, Samuel; François, Jérôme et al

Scientific Conference (2017, October 30)

The Named-Data Networking (NDN) has emerged as a clean-slate Internet proposal on the wave of Information-Centric Networking. Although the NDN’s data-plane seems to offer many advantages, e.g., native ... [more ▼]

The Named-Data Networking (NDN) has emerged as a clean-slate Internet proposal on the wave of Information-Centric Networking. Although the NDN’s data-plane seems to offer many advantages, e.g., native support for multicast communications and flow balance, it also makes the network infrastructure vulnerable to a specific DDoS attack, the Interest Flooding Attack (IFA). In IFAs, a botnet issuing unsatisfiable content requests can be set up effortlessly to exhaust routers’ resources and cause a severe performance drop to legitimate users. So far several countermeasures have addressed this security threat, however, their efficacy was proved by means of simplistic assumptions on the attack model. Therefore, we propose a more complete attack model and design an advanced IFA. We show the efficiency of our novel attack scheme by extensively assessing some of the state-of-the-art countermeasures. Further, we release the software to perform this attack as open source tool to help design future more robust defense mechanisms. [less ▲]

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See detailInteraktive Lehr-/Lernmethoden in Éveil aux Sciences
Andersen, Katja Natalie UL

Scientific Conference (2017, October 24)

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See detailEthereum: state of knowledge and research perspectives
Tikhomirov, Sergei UL

Scientific Conference (2017, October 24)

Ethereum is a decentralized application platform that allows users to write, deploy, and interact with smart contracts -- programs that encode financial agreements. A peer-to-peer network of mutually ... [more ▼]

Ethereum is a decentralized application platform that allows users to write, deploy, and interact with smart contracts -- programs that encode financial agreements. A peer-to-peer network of mutually distrusting nodes maintains a common view of the state of all accounts and executes smart contracts' code upon request. The global state is stored in a blockchain secured by a proof-of-work consensus mechanism similar to that in Bitcoin. The core value proposition of Ethereum is a Turing-complete programming language that enables implementing complex logic in smart contracts. Decentralized applications without a trusted third party are appealing in many areas, such as financial services, crowdfunding, and gambling. Smart contracts as a research topic contains many unsolved challenges and spans over areas ranging from cryptography, consensus algorithms, and programming languages to governance, ethical, and legal issues. This paper is the first to summarize the state of knowledge in this field. We provide a technical overview of Ethereum and outline open challenges along with proposed solutions. We also mention alternative blockchains with Turing complete programming capabilities. [less ▲]

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See detailPluriversalizing (Higher) Education: meanings, contexts and possibilities
de Saint-Georges, Ingrid UL

Scientific Conference (2017, October 20)

This presentation explores hybridity, multilingualism and mediation in (Higher) Education, especially when (university) classrooms become more visibly diverse and multilingual. It begins by identifying ... [more ▼]

This presentation explores hybridity, multilingualism and mediation in (Higher) Education, especially when (university) classrooms become more visibly diverse and multilingual. It begins by identifying first which professional dilemmas and opportunities the diversifying classroom crates for both teachers and students. How does increasing diversity affect for example language policy, assessment, expression, and curriculum development? The paper next suggests that taking an interdisciplinary outlook might shed interesting light on these questions. In particular, insights from socioliguistics, multilingual education, social semiotics and post-colonial studies might lead to renewed thinking about traditional concepts of miedations and re-mediations. Finally, drawing on both succesful and problematic cases, the discussion explores the meanings, challenges and opportunities that arise when adopting what researchers from the South have called a pluriversal perspective, and when one substitutes a multilingual ethos and ethics of care for the more traditional monolingual, eurocentric orientation most prevalent in Western Universities. [less ▲]

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See detailGCAI 2017: 3rd Global Conference on Artificial Intelligence, Miami, FL, USA, 18-22 October 2017
Benzmüller, Christoph UL; Lisetti, Christine; Theobald, Martin UL

Scientific Conference (2017, October 18)

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See detailDigital health: navigating towards meaningful and sustainable solutions
Lygidakis, Charilaos UL

Scientific Conference (2017, October 18)

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See detailUnified Satellite and Terrestrial ACM Design
Haqiqatnejad, Alireza UL; Kayhan, Farbod UL

Scientific Conference (2017, October 17)

First step towards integrating satellite and terrestrial standards at the physical layer is to design a unified packet frame structure, and in particular, a unified adaptive coding and modulation (ACM ... [more ▼]

First step towards integrating satellite and terrestrial standards at the physical layer is to design a unified packet frame structure, and in particular, a unified adaptive coding and modulation (ACM) scheme without substantial loss in either of the systems. In this paper we introduce a methodology to design such a set of modulation and coding (MODCOD) combinations. In the first step, we design a set of base MODCODs for the AWGN channel. Then, for any other given channel model, we build a new set of MODCODs through a suitable transformation of the base MODCODs. We mainly focus on two types of channels: (a) non-linear satellite channels, and (b) AWGN channels with fading. We compare our results with latest digital video broadcasting standards, namely, DVB-T2 and DVB-S2X. [less ▲]

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See detailThe dialectic of transnational integration and national disintegration as mayor challenge of the aggregation of knowledge by European Expert Groups
Decieux, Jean Philippe Pierre UL

Scientific Conference (2017, October 14)

From a phenomenological perspective on modern systems of knowledge production a transformation towards a hybrid knowledge production has taken place. Categories like locality or embeddedness have been ... [more ▼]

From a phenomenological perspective on modern systems of knowledge production a transformation towards a hybrid knowledge production has taken place. Categories like locality or embeddedness have been overcome and rise of arenas of cross-broader-cooperation can be observed. The political sector is an important example where a rise of decision-making contexts with supra national relevance can be detected. As consequence a transformation of the political advisory-system towards the genesis of multinational advisory organisations on supranational level can be observed. This means that decision-making knowledge is developed and standardized on supranational level and supposed to be applied top-down on local level. Theoretically such a cooperative form of knowledge co-production of application-driven knowledge by a heterogeneous set of stakeholders aims to produce a context specific solution for specific problems of application (“socially robust knowledge”) in order to provide evidence-based policy-making. But in fact such a processes of unification of knowledge on supranational level often reduces national policy autonomy and is associated with the risk of limited compliance to the specific local needs. Thus the universal transnational knowledge is systematically contested by a variety of particularistic relevancies as is lacks in socially robustness for the application on national decision-making level (“dialectic of transnational integration and disintegration “. This paper analyses how national policy systems are responding to global integration initiatives. By using an in-depth-case-study, I focus especially on individual actors and their responses in the light of a multiplicity of institutional relevancies and the effective social robustness of the aggregated knowledge on national level. [less ▲]

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See detail“They can communicate, BUT…” - Language learning goals of forced migrants in multilingual Luxembourg
Kalocsanyiova, Erika UL

Scientific Conference (2017, October 13)

This contribution presents data from an ongoing doctoral research project that focuses on the linguistic integration trajectory of Syrian and Iraqi refugees in Luxembourg. Drawing on interview data and ... [more ▼]

This contribution presents data from an ongoing doctoral research project that focuses on the linguistic integration trajectory of Syrian and Iraqi refugees in Luxembourg. Drawing on interview data and classroom observations we explore teachers’ and learners’ attitudes towards Luxembourg’s main languages and their beliefs about how to approach language learning in a multilingual society. Upon arrival, refugees are immediately exposed to the country’s immense linguistic diversity along with ambiguous and often competing ideologies as to what languages to learn. While French is the main vernacular language, English has been gaining importance as lingua franca of the Grand Duchy’s large international community. Government sources increasingly emphasise the role of Luxembourgish as the sole language of integration, despite its minority position in several domains. Other languages such as German or Portuguese might be equally important for navigating local life. Refugees from regions where (a regional/dialectal form of) Arabic enjoys the status of majority language, are expected to encounter difficulties in adapting to the complex language situation of Luxembourg. As a result, the research participants have shown a strong interest in developing different capabilities in a variety of languages and for a range of purposes. Our data confirms that wide-ranging learning outcomes are pursued in this context. While teachers acknowledge the importance of this aspect for setting language learning goals, system-wide, policy-declared goals still prevail in their pedagogical practice. Yet, we have observed instances of more holistic approaches that recognize the multilingual character of communication and learning, and take better account of the learners’ short- and long-term expectations. [less ▲]

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See detailMagnetic SANS as a probe to disclose internal interfaces and the spin structure of nanoparticles
Michels, Andreas UL

Scientific Conference (2017, October 11)

Detailed reference viewed: 28 (3 UL)
Peer Reviewed
See detailLa famille, lieu d'apprentissage de la diversité et de la mobilité
Ehrhart, Sabine UL

Scientific Conference (2017, October 11)

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See detailThe Implementation of the Cross-Border Mergers Directive in Luxembourg - A Critical Assessment
Corbisier, Isabelle UL

Scientific Conference (2017, October 07)

Many cross-border mergers do take place in Luxembourg. Most practical difficulties in implementing the new regime were solved in the first months/years following the transposal of the Cross-Border Mergers ... [more ▼]

Many cross-border mergers do take place in Luxembourg. Most practical difficulties in implementing the new regime were solved in the first months/years following the transposal of the Cross-Border Mergers directive. As a matter of fact most of the cross-border mergers taking place in Luxembourg are of a rather uncomplicated kind as they are often intra-group mergers, between companies with no or very few employees and furthermore in a vast majority of cases between a parent company and its 100% subsidiary. In the most recent practice however, the following questions/issues were raised : - the directive only addresses mergers. Other restructurings such as divisions, transfers of assets, of a branch of activity or of the universality of the company’s assets are not covered by the directive and this even though they can likewise take place across the borders and can be difficult to carry out in the absence of some harmonized regime; - a new company law reform was recently adopted in Luxembourg, introducing, a.o., a new article 1865bis in the Civil Code that allows “dissolution-confusion” in one-shareholder companies. The question can be raised whether this provision could be applied across the borders (f.e. could a French company being the sole shareholder of a Luxembourg company decide to dissolve it without having to consider the provisions of the Cross-Border Mergers Directive ?); - another provision of the recently adopted company law reform does re-balance things when considering the cross-border merger as a means for the company to change “nationality” (or law applicable thereto). In the past companies were eventually forced to use the detour of the CBM in order to avoid the requirement of unanimity imposed by law for the transfer of the seat. Since aforementioned reform unanimity is no longer required for the cross-border transfer of the seat. The usefulness of the Cross-Border Merger Directive is therefore not in the least questioned in Luxembourg but it is regrettable that this would appear part of a “work-in-progress” that however does not show concrete signs of being completed any time soon. [less ▲]

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See detailItaliani fuggitivi o semplici “gondolieri” dello spazio?
Cicotti, Claudio UL

Scientific Conference (2017, October 06)

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See detailCreditor Protection in Private Companies - the Luxembourg Experience
Corbisier, Isabelle UL

Scientific Conference (2017, October 06)

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See detailGrenzüberschreitende Berufsausbildung als Prozess grenzüberschreitenden Lernens
Funk, Ines; Nienaber, Birte UL; Dörrenbächer, H. Peter

Scientific Conference (2017, October 03)

Detailed reference viewed: 15 (1 UL)