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See detailSupporting Security Protocols on CAN-Based Networks
Bloom, Gedare; Cena, Gianlua; Cibrario Bertolotti, Ivan et al

Scientific Conference (in press)

The ever-increasing variety of services built on top of the Controller Area Network (CAN), along with the recent discovery of vulnerabilities in CAN-based automotive systems (some of them demonstrated in ... [more ▼]

The ever-increasing variety of services built on top of the Controller Area Network (CAN), along with the recent discovery of vulnerabilities in CAN-based automotive systems (some of them demonstrated in practice) stimulated a renewed attention to security-oriented enhancements of the CAN protocol. The issue is further compounded nowadays because, unlike in the past, security can no longer be enforced by physical bus segregation. This paper describes how CAN XR, a recently proposed extension of the CAN data-link layer, can effectively support the distributed calculation of arbitrary binary Boolean functions, which are the foundation of most security protocols, without necessarily disclosing their operands on the bus. The feasibility of the approach is then shown through experimental evaluation and by confirming its applicability to a shared key generation protocol proposed in literature. [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)

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See detailThe Cipher, the Random and the Ransom: A Survey on Current and Future Ransomware
Genç, Ziya Alper UL; Lenzini, Gabriele UL; Ryan, Peter UL

Scientific Conference (2017, November 17)

Although conceptually not new, ransomware recently regained attraction in the cybersecurity community: notorious attacks in fact have caused serious damage, proving their disruptive effect. This is likely ... [more ▼]

Although conceptually not new, ransomware recently regained attraction in the cybersecurity community: notorious attacks in fact have caused serious damage, proving their disruptive effect. This is likely just the beginning of a new era. According to a recent intelligence report by Cybersecurity Ventures, the total cost due to ransomware attacks is predicted to exceed $5 billion in 2017. How can this disruptive threat can be contained? Current anti-ransomware solutions are effective only against existing threats, and the worst is yet to come. Cyber criminals will design and deploy more sophisticated strategies, overcoming current defenses and, as it commonly happens in security, defenders and attackers will embrace a competition that will never end. In this arm race, anticipating how current ransomware will evolve may help at least being prepared for some future damage. In this paper, we describe existing techniques to mitigate ransomware and we discuss their limitations. Discussing how current ransomware could become even more disruptive and elusive is crucial to conceive more solid defense and systems that can mitigate zero-day ransomware, yielding higher security levels for information systems, including critical infrastructures such as intelligent transportation networks and health institutions. [less ▲]

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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 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 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)

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

Scientific Conference (2017, October 06)

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

Scientific Conference (2017, October 03)

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See detailGesellschaftlicher Wandel als Re-Formierung sozialer Praxis: Analytische Zugänge
Wille, Christian UL

Scientific Conference (2017, October)

In Abgrenzung zu herkömmlichen Beschreibungen von gesellschaftlichen Verhältnissen entwerfen Praxistheorien eine Vision von Sozietät, die performativ angelegt ist, Materialität und Körperlichkeit betont ... [more ▼]

In Abgrenzung zu herkömmlichen Beschreibungen von gesellschaftlichen Verhältnissen entwerfen Praxistheorien eine Vision von Sozietät, die performativ angelegt ist, Materialität und Körperlichkeit betont und Formen des Wandels integriert. Allerdings geben die Praxistheorien (zunächst) keine modellhaften Erklärungen für gesellschaftliche Verhältnisse oder verweisen (offenkundig) auf Stellschrauben für die Steuerung des Sozialen. Im Sinne einer dynamischen Heuristik bieten sie vielmehr vielfältige und miteinander verknüpfte Beschreibungs- und Analysekategorien, treffen Aussagen über (angenommene) Zusammenhänge und versuchen die Heterogenität und Widersprüchlichkeit des Sozialen als Vollzugswirklichkeiten zu greifen. Der Vortrag setzt an dieser Stelle an und will die Chancen und Grenzen einer praxistheoretischen Reformulierung und Untersuchung von gesellschaftlichen Verhältnissen unter dem Aspekt von Wandel umreißen. Dafür wird besonders auf den flexiven Charakter von sozialen Praktiken eingegangen (In/Stabilität), das Moment der Praxislogik entwickelt (Wissen) und gefragt, inwiefern Praxistheorien eine diachrone Perspektive vorsehen (Rekonfiguration). Letztere erscheint unverzichtbar für die Thematisierung von Wandel und soll helfen praxistheoretisch orientierte Ansatzpunkte seiner Untersuchung zu identifizieren. Der Vortrag verzichtet auf empirische Beispiele, überträgt die Überlegungen allerdings auf Fragen des Forschungsprozesses. [less ▲]

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See detailAssessing adaptive task assignments in a simulated classroom setting
Hörstermann, Thomas UL

Scientific Conference (2017, October)

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See detailCharacterizing Driving Environments Through Bluetooth Discovery
Bronzi, Walter UL; Faye, Sébastien UL; Frank, Raphaël UL et al

Scientific Conference (2017, October)

Within the world of wireless technologies, Bluetooth has recently been at the forefront of innovation. It is becoming increasingly relevant for vehicles to become aware of their surroundings. Therefore ... [more ▼]

Within the world of wireless technologies, Bluetooth has recently been at the forefront of innovation. It is becoming increasingly relevant for vehicles to become aware of their surroundings. Therefore, having knowledge of nearby Bluetooth devices, both inside and outside other vehicles, can provide the listening vehicles with enough data to learn about their environment. In this paper, we collect and analyze a dataset of Bluetooth Classic (BC) and Low Energy (BLE) discoveries. We evaluate their respective characteristics and ability to provide context-aware information from a vehicular perspective. By taking a look at data about the encountered devices, such as GPS location, quantity, quality of signal and device class information, we infer distinctive behaviors between BC and BLE relative to context and application. For this purpose, we propose a set a features to train a classifier for the recognition of different driving environments (i.e. road classes) from Bluetooth discovery data alone. Comparing the performance of our classifier with different sampling parameters, the presented results indicate that, with our feature selection, we are able to predict with reasonable confidence up to three classes (Highway, City, Extra-Urban) by using only discovery data and no geographical information. This outcome gives promising results targeted at low energy and privacy-friendly applications and can open up a wide range of research directions. [less ▲]

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See detailMultiscale model of sintering: diffusion and plastic flow
Kabore, Brice Wendlassida UL; Peters, Bernhard UL

Scientific Conference (2017, September 27)

Impacting particles or static aggregated particles at high temperature may undergo a permanent change of shape modifying the microstructure. Two particles in contact can develop some bonds within sub ... [more ▼]

Impacting particles or static aggregated particles at high temperature may undergo a permanent change of shape modifying the microstructure. Two particles in contact can develop some bonds within sub-second time. This fast sintering force in the particular case of the snow contribute to the rheological behavior and grain rearrangement [1]. Understanding the kinetics of sintering in granular material is of great importance in some engineering applications. For decades, diffusional processes have received more attention in investigations related to the mechanisms behind sintering [2]. Some works have suggested that the plastic flow might be neglected in sintering process for stresses are not high enough to cause dislocation. However, some studies have showed that stresses experienced in fine particles necks can be high enough and even lead to plasticity driven sintering. The importance of each mechanism in the sintering process may lie in the temporal and spatial scale of interest. Increasing importance is being accorded to the role of plastic flow in sintering. however, several investigations have proved that the conventional plasticity theory may fail to predict plastic activity at micro-scale, The objective of this work is to develop adequate computational model that includes instantaneous and time-dependent plastic flow at micro-scale. We aim at extending existing models of sintering and plasticity to cope with multiple spatial and temporal scales simulations using Extended Discrete Element Method. The numerical results are compare to experimental data on snow. [less ▲]

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See detailEnlarging the frame: Issues of Inclusion and mental health in an ageing society
Murdock, Elke UL; Ferring, Dieter UL

Scientific Conference (2017, September 22)

This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil ... [more ▼]

This contribution frames the notions of inclusion and mental health by describing trends in European societies at the social and economic level that will have direct consequences for a participative civil society and social cohesion. Our starting point is the observation that the world faces challenges at the start of the 21st century that are new and unprecedented in its history. The four global forces that break all the trends known so far in human history include urbanisation, accelerating technological development, greater global connections, and population ageing (Dobbs, Manyika and Woetzel, 2016). We will first describe the scale of population ageing, as ageing populutions characterize several developed economies. In a second step, we will highlight some consequences of population ageing for social welfare and in a third part I will elaborate on the notion of justice and inclusion in rapidly changing societies. [less ▲]

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See detailExposure to Sexualized Pictures Primes Occupational Stereotypes
Melzer, André UL; Ramsperger, Stephan

Scientific Conference (2017, September 05)

Gender stereotypes in advertisements, magazines, or videogames often appear in the form of sexualized portrayals of women characterized by inappropriately foregrounding female sexuality. Women are shown ... [more ▼]

Gender stereotypes in advertisements, magazines, or videogames often appear in the form of sexualized portrayals of women characterized by inappropriately foregrounding female sexuality. Women are shown with highly revealing clothing and engaging in seductive acts. Sexualization may serve as a motivator to adopt congruent gender-related stereotypes in the viewers and, thus, influence beliefs about women in the real world, including negative effects on self-efficacy of women (Behm-Morawitz & Mastro, 2009). In two studies, sexualization had similar adverse effects on participants’ spontaneous judgments of occupational stereotypes and job classification. In a field study (Study 1, N=128), sexualized female game characters were spontaneously associated with jobs of lower prestige (e.g., hairdresser). In contrast, non-sexualized portrayals were linked to jobs of higher status (i.e., physician, educator). This detrimental effect of sexualized portrayal on occupational status was replicated for depictions of male and female fashion models in an online survey (Study 2, N=459). Moreover, this effect was partially mediated by ratings of lower perceived competence for sexualized portrayals of both men and women. The findings of the present studies extend the multifaceted negative effects of sexualization on stereotyping by showing that the resulting spontaneous competence judgments may have detrimental job-related consequences. [less ▲]

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See detailMultiscale Modelling of Damage and Fracture in Discrete Materials Using a Variational Quasicontinuum Method
Rokos, Ondrej; Peerlings, Ron; Beex, Lars UL et al

Scientific Conference (2017, September 05)

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See detailEmployable Middle Ages - MediävistInnen auf dem Arbeitsmarkt von morgen?
Bendheim, Amelie UL

Scientific Conference (2017, September)

Detailed reference viewed: 8 (1 UL)
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See detailDie Trainierbarkeit von komplexem Problemlösen im Rahmen eines Trainings für Experimentieren.
Stebner, Ferdinand; Kunze, Thiemo UL; Kemper, Christoph UL et al

Scientific Conference (2017, September)

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See detailKomplexes Problemlösen und Intelligenz
Greiff, Samuel UL

Scientific Conference (2017, September)

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See detailNatural Resource Management: A Network Perspective
Kyriakopoulou, Efthymia UL; Xepapadeas, Anastasios

Scientific Conference (2017, September)

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See detailOrganizational learning and complex problem solving. Towards a better understanding of the modern workplace.
Jaster, Christian UL; Mainert, Jakob; Greiff, Samuel UL

Scientific Conference (2017, September)

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See detailSelektives Enkodieren in figuralen Matrizen.
Domnick, Florian UL; Becker, Nicolas; Greiff, Samuel UL et al

Scientific Conference (2017, September)

Detailed reference viewed: 13 (1 UL)
See detailInterkulturelle Annäherung im Zeichen der Exogamie - Kommunikationsstrategien im König Rother
Bendheim, Amelie UL

Scientific Conference (2017, September)

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See detailZusammenhänge zwischen Zahlenstrahlschätzfähigkeit, Mathematikleistung und Schülercharakteristika: Eine Vollerhebung mit 6484 Luxemburgischen Neuntklässlern
Nurayadin, Sevim; Ugen, Sonja UL; Martin, Romain et al

Scientific Conference (2017, September)

In der Zahlenstrahlschätzaufgabe sehen die Probanden eine Zahl und einen leeren Zahlenstrahl, bei dem nur die erste und die letzte Position markiert und mit ihrem Wert beschriftet sind. Die Aufgabe der ... [more ▼]

In der Zahlenstrahlschätzaufgabe sehen die Probanden eine Zahl und einen leeren Zahlenstrahl, bei dem nur die erste und die letzte Position markiert und mit ihrem Wert beschriftet sind. Die Aufgabe der Probanden besteht darin, die Position der Zahl auf dem Strahl anzugeben. Der vorherrschende Ansatz in der Literatur geht davon aus, dass diese Aufgabe die Qualität der mentalen Repräsentation numerischer Größen erfasst. Diese gibt Lernen ein Verständnis von numerischen Größen und ihren Interrelationen, das eine wichtige Grundlage für den Erwerb anspruchsvollerer mathematischer Kompetenzen z.B. in Arithmetik oder Algebra darstellt. Zahlreiche Studien fanden positive Korrelationen zwischen der Zahlenstrahlschätzfähigkeit und der Mathematikleistung. Daher bietet es sich an, die Zahlenstrahlschätzaufgabe zur Diagnostik mathematischer Leistung und Entwicklung zu nutzen. Jedoch ist zum einen noch unklar, wie die Zahlstrahlschätzfähigkeit in der Population ausgeprägt und verteilt ist. Zum anderen ist offen, inwieweit die Korrelation mit der Mathematikleistung eine Scheinkorrelation darstellt, die auf den Einfluss anderer Personeneigenschaften zurückgeht. Um diese Punkte zu klären, analysierten wir Daten aus einer Vollerhebung aller Neuntklässler in Luxemburg (N = 6484). Die Schüler lösten die Zahlenstrahlschätzaufgabe mit ganzen Zahlen sowie Brüchen, absolvierten einen standardisierten Mathematikleistungstest und beantworteten zahlreiche Fragen zu domänenspezifischen (Matheängstlichkeit, Selbstkonzept, Interesse, Testmotivation) und domänenübergreifenden (Geschlecht, Immigrationsstatus, Gewissenhaftigkeit und elterlicher sozioökonomischer Status) Personenmerkmalen. Wir dokumentierten Mittelwerte und Verteilungseigenschaften der Zahlenstrahlschätzfähigkeit für diverse Subpopulationen (Jungen, Mädchen, Migranten, Schulformen etc.). Die Ergebnisse von Mehrebenenregressionsmodellen zeigten, dass die Zahlenstrahlschätzfähigkeit erheblich enger als alle anderen erhobenen Personeneigenschaften mit der Mathematikleistung zusammenhing. Der Zusammenhang war stärker für das Schätzen von Brüchen als ganzen Zahlen. Die Ergebnisse bestätigen die Annahme, dass die Zahlenstrahlschätzfähigkeit eine zentrale Komponente mathematischen Vorwissens erfasst, die weiteres Lernen leitet. In Anbetracht der einfachen Handhabung kann die Aufgabe vielfältig eingesetzt werden, um die mathematische Leistung in der Schule zu messen oder vorherzusagen. Zukünftige Studien sollten verstärkt die Nutzung der Aufgabe in Interventionen erproben. [less ▲]

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See detailIntroduction to Detection of Non-Technical Losses using Data Analytics
Glauner, Patrick UL; Meira, Jorge Augusto UL; State, Radu UL et al

Scientific Conference (2017, September)

Electricity losses are a frequently appearing problem in power grids. Non-technical losses (NTL) appear during distribution and include, but are not limited to, the following causes: Meter tampering in ... [more ▼]

Electricity losses are a frequently appearing problem in power grids. Non-technical losses (NTL) appear during distribution and include, but are not limited to, the following causes: Meter tampering in order to record lower consumptions, bypassing meters by rigging lines from the power source, arranged false meter readings by bribing meter readers, faulty or broken meters, un-metered supply, technical and human errors in meter readings, data processing and billing. NTLs are also reported to range up to 40% of the total electricity distributed in countries such as Brazil, India, Malaysia or Lebanon. This is an introductory level course to discuss how to predict if a customer causes a NTL. In the last years, employing data analytics methods such as data mining and machine learning have evolved as the primary direction to solve this problem. This course will compare and contrast different approaches reported in the literature. Practical case studies on real data sets will be included. Therefore, attendees will not only understand, but rather experience the challenges of NTL detection and learn how these challenges could be solved in the coming years. [less ▲]

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See detailIntervention strategies to improve the quality of teachers´ judgments: Changes in the accuracy of teachers´ transition decisions
Pit-Ten Cate, Ineke UL; Krolak-Schwerdt, Sabine UL; Hörstermann, Thomas UL et al

Scientific Conference (2017, August 30)

This paper focuses on intervention modules to improve teachers’ diagnostic competence, especially in regards to decisions on students’ transition from primary to secondary education. Although these ... [more ▼]

This paper focuses on intervention modules to improve teachers’ diagnostic competence, especially in regards to decisions on students’ transition from primary to secondary education. Although these transition decisions should be based on academic achievement, research has shown non-academic variables to influence decisions, leading to disadvantages for specific groups of students. Using an experimental pre-post design, we investigated the short and long term effects of accountability, theoretical knowledge and the application of prediction rules on teachers’ judgment accuracy, respectively. Pre-intervention data showed that although teachers’ decision accuracy was of high standard, decision accuracy for ethnic majority students was significantly higher than for ethnic minority students. Increased accountability resulted in increased decision accuracy, especially in regards to decisions for ethnic minority students. Similarly, the introduction of theoretical models of decision making and judgment formation and the application of prediction rules also resulted in an improvement of transition decisions but only for ethnic minority students. Unfortunately, the differential intervention effects of the intervention modules could not be maintained over time, that is, at follow up, the ethnicity bias reappeared. From these studies we can conclude that all three intervention modules can improve the accuracy of teachers’ transition decisions. In line with the intention of the interventions, the disproportionally high rate of decision errors for ethnic minority students observed pre-intervention was eliminated post-intervention and in line with error rates for ethnic majority students. However, training or instruction should be repeated briefly before making such judgments as their influence was not maintained over time. [less ▲]

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See detailStereotypes and attitudes towards students with special educational needs in relation to teachers´ attitudes towards inclusive education
Pit-Ten Cate, Ineke UL; Krischler, Mireille UL; Krolak-Schwerdt, Sabine UL

Scientific Conference (2017, August 30)

Decisions concerning the educational instruction and pathways of students with special educational needs (SEN) may be affected by general stereotypes and associated teachers´ attitudes. Both stereotypes ... [more ▼]

Decisions concerning the educational instruction and pathways of students with special educational needs (SEN) may be affected by general stereotypes and associated teachers´ attitudes. Both stereotypes and attitudes affect judgments and behavior and hence may be pivotal for the success of inclusive education. More specifically, stereotypes and attitudes can elicit positive or negative expectations and judgments, which in turn can enhance or limit the successful inclusion of students with SEN in regular classrooms. The current study investigated stereotypes of and teachers´ implicit attitudes toward students with SEN in relation to teachers´ explicit attitudes towards inclusive education. Results show that teachers hold ambivalent views of students with learning difficulties (i.e. low competence, high warmth), whereas students with behavioral problems are perceived as neither particularly (in)competent nor warm. These stereotypes matched teachers´ implicit attitudes to the extent that implicit attitudes towards students with learning difficulties were more negative than towards students with behavioral problems. Although teachers expressed positive attitudes towards the benefits of inclusion they reported negative attitudes in regards to their ability to teach students with SEN. No associations were found between stereotypes and implicit attitudes. Implicit attitudes towards students with SEN were also not associated with explicit attitudes towards inclusive education. The warmth dimension of stereotype was however positively correlated with perceived ability to teach students with SEN. That is, perceived ability to successfully teach these students may rely on perceptions of these students´ alleged sociability. [less ▲]

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See detailTeachers’, parents’ and students’ perspectives’ on teaching and learning Greek in a community school in Luxembourg
Kirsch, Claudine UL

Scientific Conference (2017, August 25)

Many scholars have been interested in studying patterns of language shift or maintenance of migrants during their diaspora. One way of sustaining the development of the home language is through attending ... [more ▼]

Many scholars have been interested in studying patterns of language shift or maintenance of migrants during their diaspora. One way of sustaining the development of the home language is through attending a complementary school. This paper explores the differing perspectives on teaching and learning Greek in a complementary school in Luxembourg. The participants include the two teachers of this school, the mothers of three newly migrated families and their children. Like most children of newly migrated Greek families, the children in this study attend a state schools where they learn Luxembourgish, German and French (Gogonas & Kirsch 2016). They attend the Greek school one afternoon a week for three hours. The data stem from a survey with 37 parents and interviews with the teachers, parents and children. The findings of the survey indicate that the parents expect the school to develop high competences in Greek and knowledge of Greek culture and history. The newly arrived families have higher expectations than the established ones (Frygana 2016). The thematic analysis of the interviews indicates that the teachers adhered to a monolingual policy and reinforced a sense of “Greekness” by focusing on the Greek language and teaching some elements of culture (Tsagkogeorga 2016). They were aware that the multilingual children had different school experiences depending on their language competence and friendships. The children’s experiences varied in the light of their age and the teaching approaches. While the younger children saw little purpose in attending the school, the older child could make connections between the Greek school, the state school and her life and was motivated to learn Greek. The findings of this paper encourage teachers to reflect on their language policies and teaching approaches, and encourage them to capitalize on their students’ heterogeneity. [less ▲]

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See detailDeveloping language skills in 3-year-olds in multilingual Luxembourg: a case study
Kirsch, Claudine UL; Mortini, Simone UL

Scientific Conference (2017, August 24)

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See detailSocial acceptance and peer relationships of children with physical disabilities
Pit-Ten Cate, Ineke UL; Stevenson, Jim

Scientific Conference (2017, August 24)

Following the UN Convention on the rights of people with disabilities a drive towards inclusive education can be observed. Inclusive education not only aims to reduce educational inequalities but also ... [more ▼]

Following the UN Convention on the rights of people with disabilities a drive towards inclusive education can be observed. Inclusive education not only aims to reduce educational inequalities but also promotes social participation. Although social participation partly depends on the opportunity of social interaction with peers (Kirpalani et al., 2000), other factors such as social competence and peer acceptance are important too (e.g. Schwab et al., 2013). Children with special needs are often found to be socially excluded by peers (Garrote & Dessemontet, 2015) and have fewer friends than their typically developing peers (e.g. Eriksson et al., 2007). Research has also indicated that the incidence of social maladjustment problems in children with disabilities is at least twice of that for typically developing children (Goodman & Graham, 1996; Wallander et al., 1989). Hence children with disabilities may be particularly vulnerable in regards to their peer relationships and social participation. Method: Data were collected for a clinical sample of 87 children (aged 6-18 years) with disabilities (i.e. hydrocephalus with or without spina bifida) and 57 typical developing children. Children or parents completed measures on social acceptance (the Self-Perception Profile, Harter, 1985; Harter & Pike, 1984), peer problems and prosocial behaviour (SDQ; Goodman, 1997, 1999), friendship (Berndt et al., 1986) and perceived quality of life (Graham, Stevenson, & Flynn, 1997). Results: Parent and child ratings of social acceptance and peer problems indicated children with disabilities felt less accepted and experienced more peer problems than typically developing children. No differences in prosocial behaviour were found. Although parents of children with disabilities rated the quality of life regarding friendships lower than parents of typically developing children, no differences in child ratings were found. Children with disabilities rated their friendships as less positive compared to typically developing children. Variance in the perceived quality of life could be explained by peer problems and friendship ratings but not social acceptance or peer problems. Conclusion: Friendship and peer relationships emerged as an area of specific difficulty for children with disabilities. These problems were reflected in reports of lower social acceptance, more peer problems and less positive friendship ratings. Child rated quality of life in the domain of friendship was predicted by peer problems and quality of friendship but not social acceptance. Although parents and children were generally in agreement, this study demonstrates the importance of collecting data from different sources, including the children with disabilities themselves. [less ▲]

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See detailSocial participation of students with special educational needs in regular classes
Pit-Ten Cate, Ineke UL; Krischler, Mireille UL

Scientific Conference (2017, August 23)

Theoretical background: Although more than twenty years have passed since the Salamanca statement (UNESCO, 1994), research still shows that children with special educational needs (SEN) are often socially ... [more ▼]

Theoretical background: Although more than twenty years have passed since the Salamanca statement (UNESCO, 1994), research still shows that children with special educational needs (SEN) are often socially excluded by peers (Garrote & Dessemontet, 2015) and have fewer friends than their typically developing peers (e.g. Eriksson, Welander, & Granlund, 2007). Following UN conventions (UN, 2006; UNESCO, 2000) there is a drive to a more inclusive society and hence inclusive education is on the political agenda of many countries. Inclusive education not only aims to reduce educational inequalities but also promotes social participation as being accepted and appreciated by typically developing peers facilitates the development of social relations and creates opportunities for participating in peer groups (Hartup, 1996). However, social participation not only depends on the opportunity of social interaction with peers but is also affected by social competence and peer acceptance (e.g. Schwab, Gebhardt, & Gasteiger-Klicpera, 2013). To this extent, children with SEN seem to have poorer social skills than their peers and experience more problems in creating and maintaining social relations (Carlson, 1987). Students with SEN are also more vulnerable of being bullied by their typically developing peers (Rose, Monda-Amaya, & Espelage, 2011). Studies comparing the social participation of groups of students having different types of SEN suggest that the risk of being less well accepted by peers is higher for students with behavioural problems than for students with learning difficulties (Avramidis, 2010; Bossaert, Colpin, Pijl, & Petry, 2013a). Social participation includes the extent of social interactions, peer acceptance, friendships as well as social self-concept (Bossaert et al., 2013a; 2013b). As merely including these students in regular classes alone cannot guarantee social participation, the question arises to what extent different person variables contribute to social inclusion or rejection. To this extent Bossaert et al (2013a) reported that not all students with SEN experience difficulties, and that especially boys with social-emotional difficulties (i.e. autistic spectrum disorders) and girls with motor and sensory difficulties were at risk. Similarly, Schwab et al (2013) concluded that social participation was associated with specific behavioural difficulties of some students with SEN. Students with learning difficulties may also be at risk as research generally has found that these students often have problems with social skills (Wight & Chapparo, 2008), which may affect their friendships and social participation. The current study therefore first aimed to investigate the social participation of primary school students with SEN (i.e bahvioural problems or learning difficulties) attending regular schools. Second, we investigated to what extent social participation was related to academic performance, behavioural problems, and prosocial behaviour. Method: Preservice teachers completed measures of social participation, behavior and academic performance for a total of 50 primary students. Students attended different primary school classes and were described as having learning difficulties, behavioural difficulties, or both. More specifically, preservice teachers completed the Perceptions of Inclusion Questionnaire (Venetz, et al., 2015), the Strengths and Difficulties Questionnaire (Goodman, 1997) and estimated the students´ academic performance in German, French and Mathematics. The PIQ is a brief measure to assess the emotional, social and competence-based relatedness of students aged 8-16 years. The 12 items comprise 3 scales: social inclusion, emotional inclusion and academic self-concept. Each item is rated on a 4-point scale from 1 (not at all true) to 4 (certainly true). The Strengths and Difficulties Questionnaire consists of 25 statements of behavior. For each statement the degree to which this behavior is typical of their child Is rated on a 3-point scale (0 = not true, 1 = somewhat true, 2 = certainly true). The scale contains four behaviour difficulty subscales (conduct problems; hyperactivity; peer problems; and emotional symptoms) and one strength category (prosocial behavior). A total behaviour score is calculated by adding the scores of the four problem domains. Academic performance was assessed by estimates of students´ academic performance in German, French and Mathematics. Preliminary Results: Frequency distributions indicate that although the social participation of students with learning difficulties and behavioural problems, nearly one third experiences problems. In addition preservice teachers reported behavioural difficulties for a large proportion of their students (34-42%). Furthermore, for 46% of the students, prosocial behavior was rated low (i.e. scores less than 5). No differences in social inclusion were found for students with behavioural or learning difficulties. However, students with behavioural problems had significantly higher SDQ scores (i.e. more behavioural problems) than students with learning difficulties Social inclusion was negatively correlated with peer problems and conduct problems, that is students with more peer or conduct problems are less socially integrated. In contrast, a positive correlation between prosocial behavior and social inclusion indicated that students displaying kindness and support towards others are more successful in participating in their social group. No relationships were found between academic performance and social participation. Conclusion: Students with SEN may have difficulties to be fully accepted in social groups, even when educated in inclusive schools, whereby especially students with conduct and peer problems may be vulnerable. Prosocial behavior however may facilitate social participation. [less ▲]

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See detailPerspectives on translanguaging and its practices in early years in Luxembourg
Kirsch, Claudine UL

Scientific Conference (2017, August 23)

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See detailLived Histories of Science Education in Modern Luxembourg: Interactions between Global Policies, National Curriculum and Local Practices.
Reuter, Bob UL; Schreiber, Catherina

Scientific Conference (2017, August 23)

The current paper is part of a larger research project, that seeks to gain insights into the policy and curricular reform of science education in Luxembourg’s primary schools through a state of the art ... [more ▼]

The current paper is part of a larger research project, that seeks to gain insights into the policy and curricular reform of science education in Luxembourg’s primary schools through a state of the art approach that integrates research in educational sciences (interviews and classroom observations) with research in the history of education (interviews and document analyses). Beginning with the premise that “science education” as a school discipline is the product of culturally shaped expectations, we examine the interface of international and national educational policy with local educational practice through the lens of primary school science education in Luxembourg (from 1920 through the present). This papers focuses on the historical analysis of science education and policy changes in modern Luxembourg using (1) a document-based historical analysis of curricula, textbooks and public discourses and (2) interviews with curriculum developers from the 1980s and 1990s and with key participants in science education in Luxembourg to examine the lived practices in a local context. In the synergy of the different approaches, local analysis of historically shaped notions of science education can be integrated with a transnational global perspective. Our analysis shows, among other findings, that the science education curriculum was conceived as a response to a variety of specific national educational needs (e.g. environmental protection, love of nature, scientific rational thinking, economy development, technological progress, social progress, demographic changes and challenges). But at the same time, it was covertly in line with international “scientization” policies (e.g. Drori & Meyer, 2009) building on transnational ideas such as the “spiral curriculum”. The analysed educational reform is thus a relevant example to understand culturally and historically embedded perspectives of what “science” is, and how this shapes ideals of “science education” as a discipline in school. [less ▲]

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See detailDignity as Discursive Enactment of Tradition: A Narrative Approach on Tradition in Family Business
Adiguna, Rocky UL

Scientific Conference (2017, August 06)

Our current understanding of tradition in organizations remain very limited. The lack of studies that take tradition as the main focus have made this concept overlooked as an important organizational ... [more ▼]

Our current understanding of tradition in organizations remain very limited. The lack of studies that take tradition as the main focus have made this concept overlooked as an important organizational feature. In this paper, I set out to address this issue by exploring how tradition is (re)produced and (re)interpreted in a century-old family-owned hotel. By adopting a narrative approach as an interpretive lens, I found that the reproduction and reinterpretation of tradition is discursively mediated through the notion of dignity. In particular, this paper argues for three forms of 'doing' dignity: first, dignity-by-category that is enacted through the discursive use of category making; second, dignity-by-sanctity that is enacted through sanctifying particular relations; and third, dignity-by-authority that is enacted through the exercise of authority to compel others to acknowledge one's dignity. To extend it further, the possibility of conceptual relations between tradition, dignity, and narrative identity is discussed. Drawing from the broader fields of social sciences, this study contributes to the scarce literature on tradition theory and dignity in organizations. [less ▲]

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See detailCollaborative problem solving behavior. A deep dive into log files
Schweitzer, Nick UL; Herborn, Katharina UL; Mustafic, Maida UL et al

Scientific Conference (2017, August)

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See detailThe role of international organisations in the New Math reform process
Nadimi Amiri, Shaghayegh UL

Scientific Conference (2017, August)

This paper studies a particular school reform that travelled over countries and continents. The target reform of this paper is the New Math reform, which started in the United States and travelled through ... [more ▼]

This paper studies a particular school reform that travelled over countries and continents. The target reform of this paper is the New Math reform, which started in the United States and travelled through many European countries. This article is part of my PhD project. I previously presented some of the results in different conferences, for instance: (Nadimi, 2015a, 2015b, 2016). The present paper studies the role of the international institutions in the adaptation of the reform in Luxembourg In 1958, the School Mathematics Study Group (SMSG) in the United States started a series of mathematics reform under the title “the New Math reform”. The aim of this reform plan was to promote the “problem solving” abilities in students (Phillips, 2014, pp. 16- 59). Many of mathematicians and math educators who became a member of the SMSG, had already started working on a new system of math education at the University of Chicago since 1955. However, the launch of Sputnik satellite by the USSR in 1957 gave the opportunity to trigger the New Math reform. The origin of the New Math reform was the ‘modern mathematics’ of the French Bourbaki group. A group of French mathematicians, since 1935, under the pseudonym Nicolas Bourbaki founded the “modern mathematics” by publishing the series of Elements of Mathematics (Bourbaki's_homepage). The reform came back to its land of origin through a conference organised by OEEC (Organisation for European Economic Co-operation) in the Royaumont abbey in Paris to foster the reform movement in Europe (OECD, 1961). The official title of the conference was “New thinking in mathematics education”, but it is known as the “Royaumont seminar”. OECD (the Organisation succeeding the OEEC) published the proceeding of the conference and organised other following conferences. The fact that OEEC/OECD hosts these conferences shows the politico-economic aspect of this reform. (Tröhler, 2015, p. 6) indicates that organisations like OEEC were created to link the national and the international, to create a global sphere, and to form an institutional or organisational channel to transfer desired ideas, policies, and curricula. The practical implementations of the New Math reform, in Europe, were discussed in two international organisations: ICMI (International Commission on Mathematical Instruction), founded in 1908, and CIEAEM (Commission Internationale pour l’Étude et l’Améloration de l’Enseignement des Mathématiques), established in 1950 (Vanpaemel, 2012). Furthermore, there were also local institutions, such as Centre Belge de Pédagogie de la Mathématique (CBPM). This centre had a close collaboration with Luxembourgian teachers and school stakeholders. This paper reviews the process of the New Math reform in Luxembourg by focusing on the interactions between the international institutions and the local school system. By telling the story of Luxembourg, the paper reveals a part of history related to the acts and efforts of the mentioned international organisations in the dissemination of the New Math reform idea in Europe. It shows how the national and international interactions could help the advancement of the reform and where the collaboration met challenges. The central question that shapes the paper is that up to what point the international cooperation of Luxembourgian stakeholders could be influential at the national level. This can be an example of how the acts and efforts of international organisations interact with the local interested parties in the development of an educational idea. [less ▲]

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See detailDiscussant
Greiff, Samuel UL

Scientific Conference (2017, August)

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See detailPanel participant
Greiff, Samuel UL

Scientific Conference (2017, August)

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See detailExperimental and numerical assessment of the mechanics of keloid-skin composites undergoing large deformations
Sensale, Marco UL; Chambert, Jerome; Chouly, Franz et al

Scientific Conference (2017, August)

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See detail“It is in giving that we receive, isn’t it?” – Intergenerational family solidarity, reciprocity and subjective well-being in the context of migration.
Albert, Isabelle UL; Barros Coimbra, Stephanie UL; Ferring, Dieter UL

Scientific Conference (2017, July 17)

Research on intergenerational relations has underlined the importance of reciprocity in the regulation of support exchange. The VOC study has demonstrated cross-cultural differences in reciprocity and ... [more ▼]

Research on intergenerational relations has underlined the importance of reciprocity in the regulation of support exchange. The VOC study has demonstrated cross-cultural differences in reciprocity and effects on subjective well-being. Less is known regarding migrant families as intergenerational support patterns could differ from host families due to specific needs or depending on different value orientations and family norms. Here, we focus therefore on the role of reciprocity in intergenerational family support in a sample of altogether N = 152 Luxembourgish and Portuguese (young) adults and their parents, all living in Luxembourg. In general, parents reported providing more social support for their children than they receive; but PT compared to LUX children reported providing as much social support as they receive from their parents. Results will be discussed within an integrative model on intergenerational family relations in the light of migration and ageing. [less ▲]

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See detaileXtended Variational Quasicontinuum Methodology for Modelling of Crack Propagation in Discrete Lattice Systems
Rokos, Ondrej; Peerlings, Ron; Zeman, Jan et al

Scientific Conference (2017, July 17)

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See detailAn equation-free multiscale method: a result of extending the quasicontinuum method to irregular structures
Beex, Lars UL; Kerfriden, Pierre

Scientific Conference (2017, July 16)

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See detailMulticulturalism in Luxembourg: Challenges and opportunities.
Albert, Isabelle UL; Lorente, Sandy; Hoffmann, Martine et al

Scientific Conference (2017, July 14)

An unprecedented number of first generation immigrants will approach retirement age. Two projects from Luxembourg are presented: the FNR-funded project on "Intergenerational Relations in the light of ... [more ▼]

An unprecedented number of first generation immigrants will approach retirement age. Two projects from Luxembourg are presented: the FNR-funded project on "Intergenerational Relations in the light of Migration and Ageing” with focus on the ageing Portuguese migrants, and a pilot field project focusing on bringing together elderly people with different social and cultural background by an Intercultural walking group. [less ▲]

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See detailNumerical prediction of the rheological properties of fresh self-compacting concrete
Huang, Haiqin UL; Zilian, Andreas UL

Scientific Conference (2017, July 14)

Self-Compacting Concrete (SCC) is a high-performance construction material that can simplify classical handling on concrete construction by avoiding the need for additional vibrational compaction ... [more ▼]

Self-Compacting Concrete (SCC) is a high-performance construction material that can simplify classical handling on concrete construction by avoiding the need for additional vibrational compaction. Challenges in the use of SCC lie in ensuring optimal operation of the material in terms of properly filled castings in presence of complex reinforcement arrangements, reduction of entrained gas bubbles and limitation of aggregate separation. A major factor influencing the aforementioned aspects is the rheological properties of SCC mixtures under varying conditions (e.g. content composition, mechanical impact, temperature, moisture). This contribution aims at unified constitutive modelling of SCC in the setting stage. Concrete setting describes the transition from fluid-like fresh concrete, which -in presence of time- dependent transport-reaction processes- develops a porous cementitious structure, to hardened concrete showing solid-like behaviour. The constitutive model is implemented using the open-source finite element framework FENICS and applied to a number of benchmark problems. [less ▲]

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See detailIntergenerational relationship regulation in the light of migration and ageing: The case of (young) adult children and their parents from Portuguese immigrant and Luxembourgish families.
Albert, Isabelle UL; Barros Coimbra, Stephanie UL; Ferring, Dieter UL

Scientific Conference (2017, July 14)

The negotiation of autonomy and relatedness in the relations between children and their parents constitutes a key topic of intergenerational relationship regulation over the whole family life cycle. In ... [more ▼]

The negotiation of autonomy and relatedness in the relations between children and their parents constitutes a key topic of intergenerational relationship regulation over the whole family life cycle. In the context of migration, an acculturation gap between parents and their adult children might lead to different identity constructions and mutual expectations with regard to intergenerational solidarity and support. These differences in expectations and beliefs can affect relationship quality between the family members from different generations as well as their well-being. In the present study, we focus on a sample of altogether N = 152 Luxembourgish and Portuguese (young) adults and their parents from immigrant and Luxembourgish families, all living in Luxembourg. Portuguese adult children were born resp. had grown up in Luxembourg. First results show a high cohesion in both Portuguese immigrant and luxembourgish families; however, enmeshment and normative expectations regarding adult children’s support for their ageing parents were higher in Portuguese families. The findings further suggest that ambivalence might be experienced in particular when individual striving for independence seems difficult to reconcile with norms of family obligation. Implications for well-being of family members from both generations will be discussed taking into account an integrative model on intergenerational family relations in the light of migration and ageing. [less ▲]

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See detailError-controlled computational fracture mechanics
Bordas, Stéphane UL

Scientific Conference (2017, July 12)

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See detailRisk, safety and assistive technology in the context of ageing-in-place
Lamotte, Mathilde UL; Ferring, Dieter UL; Tournier, Isabelle UL

Scientific Conference (2017, July 06)

When speaking about ageing in place, risk of accidents and subsequent injuries is an important part of individual worries, and risk avoidance or risk minimisation are main concerns of older people and ... [more ▼]

When speaking about ageing in place, risk of accidents and subsequent injuries is an important part of individual worries, and risk avoidance or risk minimisation are main concerns of older people and their caregivers. Findings show that older people are more at risk of unintended injuries than younger people (i.e. falls, foodborne diseases). Moreover, individual concerns and associated worries to avoid specific risks may even lead to the decision to move to an institution. In this context it is important to consider that being “as safe as possible” with respect to objective parameters does not necessarily indicate the subjective feeling of being safe. The feeling of safety and the objective degree of safety are not linearly related in a way that increasing one factor will increase the other and conversely. Furthermore, some factors that can contribute to objectively enhance safety may even lead to greater feeling of unsafety. Our review aims to investigate the relationship between objective and subjective safety in the context of ageing in place as well as the underlying mechanisms that help to explain the different links between objective and subjective safety. A further goal is offer a heuristic model presenting factors that may help to enhance older people’s consciousness of safety and thus quality of life. These include individual as well as social and macro-social factors. This paper focusses individual factors and will especially highlight the role of older people’s daily routines and their impact on technology acceptance. [less ▲]

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See detailBoard gender diversity and corporate social performance: Is there really a link?
Derouiche, Imen UL; Boubaker, Sabri; Dang, Rey et al

Scientific Conference (2017, July 05)

Our study aims to see whether and how board gender diversity (BGD) may influence the corporate social performance (CSP). Theoretically, we rely on the stakeholders’ theory. From an empirical standpoint ... [more ▼]

Our study aims to see whether and how board gender diversity (BGD) may influence the corporate social performance (CSP). Theoretically, we rely on the stakeholders’ theory. From an empirical standpoint, we employ a dynamic panel system GMM (generalized moments method) estimator to estimate a dynamic model of CSP. Our study is carried out on a sample of 101 listed firms on Euronext Paris that made up the SBF Index 250 over the 2006-2010 (be-fore the enactment of the Copé-Zimmermann on gender quota on boards). We find that board gender diversity significantly impacts CSP. Furthermore, a critical mass of female directors is significantly and positively correlated with CSP. The effect is economically significant. Finally, we take into account French specificities by examining the influence of family firms. We found that family firms contribute to the role of female directors regarding CSR activities, especially there is a critical mass of female directors in these firms. [less ▲]

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See detailSelf-care Assistive Technologies: A systematic review of studies on efficiency and factors influencing their use
Abrilahij, Afsaneh UL; Boll, Thomas UL; Ferring, Dieter UL

Scientific Conference (2017, July 05)

A gradual decline in functional and mental capacity, as well as a growing risk of care dependency constitute major concerns of life in old age. These are expected to become more urgent in the future ... [more ▼]

A gradual decline in functional and mental capacity, as well as a growing risk of care dependency constitute major concerns of life in old age. These are expected to become more urgent in the future, because the old-age dependency ratio in the EU is projected to nearly double until 2060 due to demographic change. On the other side, there is a strong desire to maintain the autonomy of older people as long as possible. In reaction to this, there have been strong health and social policy recommendations across Europe to develop and promote the use of assistive technologies (ATs). Whereas systematic reviews already exist for several kinds of ATs, reviews about self-care ATs are still missing. Based on a systematic literature search in PsycINFO, MEDLINE, and Google Scholar databases 203 papers were identified of which 13 were included according to our selection criteria. The methodological quality of all the reviewed studies is evaluated. We reviewed findings on objective and subjective indicators of independent living as efficiency criteria as well as evidence about facilitating and inhibiting factors in the use of these technologies. Self-care ATs turned out to be efficient, with respect to care hours, independence level, and self-reported satisfaction. The actual use of these ATs was influenced by diverse personal, contextual, and device aspects. Lack of randomized control trial studies and the need for a further research about ATs in the diverse subdomains of self-care activities is revealed. Based on the findings of the current study, we generate recommendations for future research. [less ▲]

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See detailThe Quest for Questions in Digital History: A Comparative View on Werner- and Delors Report on Economic and Monetary Union
Armaselu, Florentina UL; Danescu, Elena UL

Scientific Conference (2017, July 05)

Starting from Gaston Bachelard’s assumption that “all knowledge is an answer to a question”, the study proposes the use of comparative textual analysis to formulate research questions. A set of questions ... [more ▼]

Starting from Gaston Bachelard’s assumption that “all knowledge is an answer to a question”, the study proposes the use of comparative textual analysis to formulate research questions. A set of questions were derived via the TXM, Textométrie software, a tool for lexicometry and statistical analysis. Two historical documents on the Economic and Monetary Union (EMU) were examined, the Werner report and the Delors report (French versions). The “quest for questions” was based on the comparison of the documents, using the TXM specificities feature that highlights what properties are specific, as overuse or deficit, to a part versus the rest of a corpus. The documents were analysed both as entire units and as fragments (numbered parts and sections). The specificities were computed for the noun-adjective combination and parts of speech, the properties with specificity scores higher and lower than the TXM default positive and negative banality thresholds being selected for further enquiry and subsequently used to formulate research questions. Although further experiments, testing with other corpora and theoretical formalisation are required, the first results show that digital tools may serve not only as hypotheses or conclusions validators but also as means of discovering exploration paths to support interpretation and the construction of new knowledge in digital history. [less ▲]

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See detailOn the Scientific Applications of IGS Products: An Assessment of the Reprocessed TIGA Solutions and Combined Products
Hunegnaw, Addisu UL; Teferle, Felix Norman UL; Abraha, Kibrom Ebuy UL et al

Scientific Conference (2017, July 03)

Global sea levels have risen since the early 19th century and this rise is likely to accelerate through the 21st century and beyond. Much of the past information on sea level rise stems from the ... [more ▼]

Global sea levels have risen since the early 19th century and this rise is likely to accelerate through the 21st century and beyond. Much of the past information on sea level rise stems from the instrumental records of tide gauges, which measure changes in sea level relative to a tide gauge benchmark (TGBM) situated on land. In order to assess regional or global sea level changes the vertical land movements (VLM) at the tide gauge and its TGBM need to be monitored. GNSS, in particular GPS, has been recognized as one space-geodetic technique to provide highly accurate estimates of VLM in a geocentric reference frame for tide gauges and their TGBMs. As it turned out, this scientific application of GNSS poses the most stringent requirements on the consistency and homogeneity on the data, processing strategies, satellite products, bias models and reference frames used in the analysis of GNSS measurements. Under the umbrella of the International GNSS Service (IGS), the Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) has the objective to provide highly-accurate positions and VLM estimates for a global network of tide gauges contributing to the Global Sea Level Observing System (GLOSS) and the Permanent Service for Mean Sea Level (PSMSL). As such TIGA forms an important contribution of the IGS to the goals of the Global Geodetic Observing System (GGOS), the Global Climate Observing System (GCOS) and the World Climate Research Programme (WCRP). To achieve the TIGA-WG objectives, five TIGA Analysis Centers (TACs) contributed re-processed global GPS network solutions to TIGA, employing the latest bias models and processing strategies in accordance with the second IGS re-processing campaign (repro2). These individual TAC solutions were then used to compute the combined products by the TIGA Combination Centre (TCC) at the University of Luxembourg using an in-house modified version of the CATREF software package. In this study, we present and internally evaluate the individual TAC and TIGA combined products. We investigate station positions, scale and origin biases, including their frequency content. We also externally evaluate the combined products, particularly the VLM estimates, using solutions from the ITRF2008, ITRF2014 and the glacial isostatic adjustment model ICE-6G (VM5a). Finally, we draw some conclusions on the recent advances and remaining limitations of the various IGS products required for the challenging application to sea level studies. [less ▲]

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See detailMAGNETIC SMALL-ANGLE NEUTRON SCATTERING ON BULK METALLIC GLASSES
Mettus, Denis UL; Michels, Andreas UL; Birringer, Rainer et al

Scientific Conference (2017, July 03)

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See detailMagnetic neutron scattering on Nd-Fe-B magnets
Michels, Andreas UL

Scientific Conference (2017, July 02)

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See detailSpin structure of Nd-Fe-B-based textured nanocomposites:role of interface chemistry
Titov, Ivan UL; Michels, Andreas UL

Scientific Conference (2017, July 02)

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See detailImpact of Tool Support in Patch Construction
Koyuncu, Anil UL; Bissyande, Tegawendé François D Assise UL; Kim, Dongsun UL et al

Scientific Conference (2017, July)

In this work, we investigate the practice of patch construction in the Linux kernel development, focusing on the differences between three patching processes: (1) patches crafted entirely manually to fix ... [more ▼]

In this work, we investigate the practice of patch construction in the Linux kernel development, focusing on the differences between three patching processes: (1) patches crafted entirely manually to fix bugs, (2) those that are derived from warnings of bug detection tools, and (3) those that are automatically generated based on fix patterns. With this study, we provide to the research community concrete insights on the practice of patching as well as how the development community is currently embracing research and commercial patching tools to improve productivity in repair. The result of our study shows that tool-supported patches are increasingly adopted by the developer community while manually-written patches are accepted more quickly. Patch application tools enable developers to remain committed to contributing patches to the code base. Our findings also include that, in actual development processes, patches generally implement several change operations spread over the code, even for patches fixing warnings by bug detection tools. Finally, this study has shown that there is an opportunity to directly leverage the output of bug detection tools to readily generate patches that are appropriate for fixing the problem, and that are consistent with manually-written patches. [less ▲]

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See detailProfiles of students on account of complex problem solving strategies
Gnaldi, M.; Bacci, S.; Greiff, Samuel UL et al

Scientific Conference (2017, July)

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See detailTutoring and its effect on teachers.
Weber, Jean-Marie UL; Voynova, Ruzhena UL

Scientific Conference (2017, July)

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See detailProbability signatures of multistate systems made up of two-state components
Marichal, Jean-Luc UL; Mathonet, Pierre; Jorge, Navarro et al

Scientific Conference (2017, July)

The structure signature of a system made up of $n$ components having continuous and i.i.d. lifetimes was defined in the eighties by Samaniego as the $n$-tuple whose $k$-th coordinate is the probability ... [more ▼]

The structure signature of a system made up of $n$ components having continuous and i.i.d. lifetimes was defined in the eighties by Samaniego as the $n$-tuple whose $k$-th coordinate is the probability that the $k$-th component failure causes the system to fail. More recently, a bivariate version of this concept was considered as follows. The joint structure signature of a pair of systems built on a common set of components having continuous and i.i.d. lifetimes is a square matrix of order $n$ whose $(k,l)$-entry is the probability that the $k$-th failure causes the first system to fail and the $l$-th failure causes the second system to fail. This concept was successfully used to derive a signature-based decomposition of the joint reliability of the two systems. In this talk we will show an explicit formula to compute the joint structure signature of two or more systems and extend this formula to the general non-i.i.d. case, assuming only that the distribution of the component lifetimes has no ties. Then we will discuss a condition on this distribution for the joint reliability of the systems to have a signature-based decomposition. Finally we will show how these results can be applied to the investigation of the reliability and signature of multistate systems made up of two-state components. [less ▲]

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See detailTo use or not to use? Investigating the validity argument for the use of short scales in research settings
Kemper, Christoph UL; Becker, N.; Baudson, T. G. et al

Scientific Conference (2017, July)

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See detailIntelligence and sensory processing sensitivity. What is the relationship?
Baudson, Tanja Gabriele; Kemper, Christoph UL; Becker, Nicolas et al

Scientific Conference (2017, July)

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See detailEntrepreneurial learning process: The case of community of practices
Boughattas, Yosra; Geraudel, Mickaël UL

Scientific Conference (2017, June 28)

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See detailThe CSD and its influence on labour law in Europe
Ratti, Luca UL

Scientific Conference (2017, June 26)

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See detailThe effect of training morphosyntactic markers in German and in French on multilingual fifth-graders' spelling.
Bilici, Natalia UL; Ugen, Sonja UL; Fayol, Michel UL et al

Scientific Conference (2017, June 26)

Many studies focussing on spelling in French and German languages show that, even by the end of the primary school, pupils have difficulties to encode morphosyntactic information in their writing ... [more ▼]

Many studies focussing on spelling in French and German languages show that, even by the end of the primary school, pupils have difficulties to encode morphosyntactic information in their writing. Particularly problematic are, for instance, capitalisation of nouns in German (Betzel 2014) or plural markers in French (Fayol et al. 2006), because they are inaudible and require knowledge that goes beyond simple phoneme-grapheme correspondences. Our paper presents how multilingual learners deal with silent morphosyntactic markers in French and German and shows the effects of an intervention training on children's spelling performance. In total our study included 228 multilingual fifth graders (mean age 11 years) with four years instruction in German and two years instruction in French. They were assigned to an intervention (n=137) and to a control group (n=91) based on the results of a spelling test in French and German. This was done by creating performance groups that were, in a second step, attributed to one of the experimental groups taking their performance into account (quasi-randomised procedure). The French test consisted of three word categories of different difficulty (nouns, verbs, adjectives). For adjectives only, position (pre- vs. post-nominal) was also manipulated. The German test focussed on three lexical-semantic characteristics (concrete nouns, abstract nouns, nominalizations) and four syntactical positions (determinant+noun, determinant+adjective+noun, adjective+noun, noun) frequent words and pseudo-words. Additionally, word frequency was manipulated within each language (frequent words vs. pseudowords). These difficulty levels have been based on the literature published on monolingual learners (French: Totereau et al. (2014), German: Funke (2005); Guenther (2007); Betzel (2014)). The children participated in 12 intervention sessions of 20 minutes each (six in German and six in French, the order was counterbalanced). Children of the intervention group were trained to improve their morphosyntactic awareness and thus spelling performance of French plurals and German capitalization. The control group received the same amount of language input than the intervention group, but they were trained on another aspect of language i.e. listening comprehension. Results from the pre-test show that multilingual children acquiring German and French show similar difficulty patterns as German or French monolinguals. The post-test shows that the intervention group improved significantly in both their German and French spelling in comparison to the control group in all word and pseudo-word categories and positions. The intervention group's performance increased especially on pseudo-words, indicating that the training had an effect on children's spelling according to syntactic regularities. The study results are specifically important to better understand the learning processes of morphosyntactic spelling in primary school. The implications on the teaching methods will be discussed. [less ▲]

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See detailAmbivalenzerfahrungen im Kontext der Individuation im jungen Erwachsenenalter: Autonomie und Verbundenheit in portugiesischen und luxemburgischen Familien in Luxemburg.
Albert, Isabelle UL; Barros Coimbra, Stephanie UL; Ferring, Dieter UL

Scientific Conference (2017, June 23)

Es wird im Allgemeinen angenommen, dass Phasen des Übergangs in Eltern-Kind-Beziehungen besonders von Ambivalenzerfahrungen geprägt sein können. Das junge Erwachsenenalter als eine solche Phase der ... [more ▼]

Es wird im Allgemeinen angenommen, dass Phasen des Übergangs in Eltern-Kind-Beziehungen besonders von Ambivalenzerfahrungen geprägt sein können. Das junge Erwachsenenalter als eine solche Phase der Transition ist dabei gekennzeichnet durch die Aushandlung von Autonomie und Verbundenheit, die gerade im Zusammenhang mit einem verlängerten Übergang vom Jugend- ins Erwachsenenalter, wie er durch das Konzept der «emerging adulthood» (Arnett 2000) beschrieben wird, an Bedeutung gewinnt. Ein wichtiges Ereignis stellt hier zweifelsohne der Auszug aus dem Elternhaus dar, der aber nicht unbedingt mit einer vollständigen finanziellen oder emotionalen Unabhängigkeit einhergehen muss. Im Rahmen des vom FNR geförderten Projekts IRMA («Intergenerational Relations in the light of Migration and Ageing») wurden insgesamt 20 qualitative Interviews mit im Grossherzogtum Luxemburg lebenden luxemburgischen und portugiesischen Eltern-Kind-Dyaden im jungen Erwachsenenalter durchgeführt. Die portugiesischen jungen Erwachsenen waren in Luxemburg aufgewachsen, wohingegen ihre Eltern in früheren Jahren eingewandert waren. Anhand der Analyse einer Interviewsequenz, die sich mit dem Auszug aus dem Elternhaus befasst, konnten in einer Inhaltsanalyse mehrere Themenbereiche herausgearbeitet werden, nämlich Bedürfnisse nach Autonomie und Verbundenheit, Kontakthäufigkeit nach dem Auszug, geographische Nähe oder Distanz sowie die Kohäsion innerhalb der Familie. Dabei stellte sich heraus, dass Unterschiede zwischen portugiesischen und luxemburgischen Familien in der Art der Beziehungsregulation bestehen, die auch mit einem unterschiedlichen Auftreten von Ambivalenzen verbunden sein könnten. Die Ergebnisse werden im Hinblick auf die Rolle von Ambivalenz als Katalysator für die Beziehungsregulation sowie mögliche Kulturunterschiede im Erleben und Umgang mit Ambivalenzen zwischen jungen Erwachsenen und ihren Eltern diskutiert. [less ▲]

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See detailMagnetic neutron scattering on Nd-Fe-B magnets
Michels, Andreas UL

Scientific Conference (2017, June 20)

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See detailRecent results on conservative and symmetric n-ary semigroups
Kiss, Gergely UL; Devillet, Jimmy UL; Marichal, Jean-Luc UL

Scientific Conference (2017, June 16)

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See detailOn conservative and associative operations on finite chains
Devillet, Jimmy UL; Couceiro, Miguel; Marichal, Jean-Luc UL

Scientific Conference (2017, June 16)

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Detailed reference viewed: 35 (10 UL)
See detailOn the arithmetic of modular forms
Wiese, Gabor UL

Scientific Conference (2017, June 15)

In this short overview talk, we will stress the arithmetic significance of the coefficients of modular forms. This naturally leads to questions on the distribution of the coefficients in various senses ... [more ▼]

In this short overview talk, we will stress the arithmetic significance of the coefficients of modular forms. This naturally leads to questions on the distribution of the coefficients in various senses. We will briefly touch on some of them and state some open questions. The arithmetic information in the coefficients of a Hecke eigenform is summarised in the attached Galois representation. When studying its ramification properties, one notices that forms of weight one play a special role that we will explain. [less ▲]

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See detailAn Enriched Quasi-Continuum Approach to Crack Propagation in Discrete Lattices
Rokos, Ondrej; Peerlings, Ron; Zeman, Jan et al

Scientific Conference (2017, June 14)

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See detailPerspectives on multilingualism and language learning and literacy practices of early years practitioners in Luxembourg
Kirsch, Claudine UL

Scientific Conference (2017, June 14)

Multilingual pedagogies hold promise in our heterogeneous and fast developing world on account of their inclusiveness and support for social justice and political participation. In order to help early ... [more ▼]

Multilingual pedagogies hold promise in our heterogeneous and fast developing world on account of their inclusiveness and support for social justice and political participation. In order to help early years practitioners develop these innovative methods, researchers at the university of Luxembourg offered an inquiry-based professional development course which aimed to develop the practitioners’ understanding of multilingualism, help them design literacy activities in a range of languages, and enable them to evaluate their practices. The participants were teachers and para-professionals who work with 3- to 5-year-olds in nursery schools, crèches and day care centers. These institutions focus on the learning of Luxembourgish, sometimes at the expense of home languages and of French and German, both official languages in Luxembourg. The focus on Luxembourgish must be seen in relation to the heterogeneous intake where approximately 60% of the children do not speak Luxembourgish. This paper presents the preliminary findings of a questionnaire on multilingualism, language learning and literacy practices answered by 50 practitioners prior to and following the above-mentioned professional development course. The data were triangulated with the practitioners’ video-recorded language activities. The findings show that the teachers and para-professionals view multilingualism positively and promote Luxembourgish through language use and frequent literacy activities. They occasionally communicated with the youngsters in their home languages - if known - and did not object to the children using them with peers and adults. While almost all practitioners stated that the children spoke in their home language, they diverged in their beliefs regarding the appropriateness of their use. Answers were more convergent in the post-test. The findings should deepen our understanding of early years practitioners’ beliefs and language practices and help find strategies for developing multilingual pedagogies. [less ▲]

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See detailLuxembourgish English pronunciation: first forays
Deroey, Katrien UL

Scientific Conference (2017, June 10)

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See detailOn Galois representations of weight one
Wiese, Gabor UL

Scientific Conference (2017, June 08)

Modular forms of weight one play a special role, especially those that are geometrically defined over a finite field of characteristic p. For instance, in general they cannot be obtained as reductions ... [more ▼]

Modular forms of weight one play a special role, especially those that are geometrically defined over a finite field of characteristic p. For instance, in general they cannot be obtained as reductions from weight one forms in characteristic zero. Another property is that if the level is prime-to p, then the attached mod p Galois representation is unramified at p. It is known that this property characterises weight one forms (if p>2). In this talk, I will present the approach chosen in joint work with Mladen Dimitrov to prove the unramifiedness above p in the case of Hilbert modular forms of parallel weight one over finite fields of characteristic p and level prime-to p. The approach is based on Hecke theory and exhibits an interesting behaviour of the Galois representation into an appropriate higher weight integral Hecke algebra. [less ▲]

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See detailAn equation-free multiscale method applied to discrete networks
Beex, Lars UL; Kerfriden, Pierre

Scientific Conference (2017, June 06)

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