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See detailWAVEFORM DESIGN FOR AUTOMOTIVE JOINT RADAR-COMMUNICATION SYSTEM
Dokhanchi, Sayed Hossein UL

Doctoral thesis (2020)

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See detailGeneralized quasicontinuum modeling of metallic lattices with geometrical and material nonlinearity and variability
Chen, Li UL; Beex, Lars UL; Berke, Peter et al

in Computer Methods in Applied Mechanics and Engineering (2020), 366(112878),

We propose a generalized quasicontinuum method to model the mechanical response of 3D lattice structures. The method relies on the spatial coupling of fully-resolved domains and coarse-grained domains. In ... [more ▼]

We propose a generalized quasicontinuum method to model the mechanical response of 3D lattice structures. The method relies on the spatial coupling of fully-resolved domains and coarse-grained domains. In the fully-resolved domain, the full micro-structure is taken into account. In the coarse-grained domain, the kinematics of the micro-structure are individually interpolated based on their connectivity. On top of that, the contributions of the microstructure to the governing equations in the coarse-grained domain are sampled using only a few unit cells. In both domains, geometrical and material variability along the strut can be naturally taken into account using a 3D co-rotational beam finite element with embedded plastic hinges. We verify the approach for BCC lattices, demonstrating that the new method can capture both material and geometrical non-linearities of single struts at a fraction of the cost of a direct numerical simulation. [less ▲]

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See detailStichwort Ernährungsdemokratie. Ein Ernährungsrat auf nationaler Ebene als greifbares Konzept für Luxemburg
Reckinger, Rachel UL; Schneider, Norry

in Forum für Politik, Gesellschaft und Kultur in Luxemburg (2020), 408

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See detailA short Survey on the Cyber Security in Control Systems
Bezzaoucha, Souad UL; Voos, Holger UL

Scientific Conference (2020, July)

In the present survey paper, we give a short, yet exhaustive state-of-the-art about the cyber-security applied to control systems, especially the event-based strategy. Indeed, in the past few years, due ... [more ▼]

In the present survey paper, we give a short, yet exhaustive state-of-the-art about the cyber-security applied to control systems, especially the event-based strategy. Indeed, in the past few years, due to a highest degree of connectivity in modern systems, new related control-specific cyber-physical systems security challengesarise and novel approaches integrating the cyber aspect are developed.Our goal in this paper is then to provide an overview of attack-modeling and security analysis approaches in recent works thatexplore networked control systems subject to cyber-attacks attacks. To this end, we look at the control, estimation, and modeling problems. [less ▲]

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See detailDATA DRIVEN SURGICAL SIMULATIONS
Deshpande, Saurabh UL; Bordas, Stéphane UL; Beex, Lars UL et al

Scientific Conference (2020, July)

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See detailInverse simulation for retrieving the undeformed position for hyperelastic materials : application to breast simulations
Mazier, Arnaud UL; Bilger, Alexandre; Forte, Antonio et al

Scientific Conference (2020, July)

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See detailSystematic derivation of Generalized Langevin Equations for coarse-graining and bridge-scaling procedures
Meyer, Hugues UL

Scientific Conference (2020, July)

In many branches of physics, one must often deal with processes involving a huge number of degrees of freedom. Instead of describing the dynamics of each individual of them, one rather wants to ... [more ▼]

In many branches of physics, one must often deal with processes involving a huge number of degrees of freedom. Instead of describing the dynamics of each individual of them, one rather wants to characterize the process of interest via a small set of observ- ables that capture its main features of the process. Even if the microscopic dynamics can be resolved using Newton’s equations of motion, it quickly becomes a computation- ally very expensive calculation to make. It is however much more convenient to come up with a self-consistent equation of motion for the ’global’ observable of interest itself in order to reduce the complexity of the problem. The development of the Mori-Zwanzig formalism in the 1960’s allowed to systematically derive such equations for arbitrary observables in stationary processes. This framework, derived from first principles by means of projection operator techniques, proves the structure of what is now known as the Generalized Langevin Equation, i.e. a stochastic equation of motion which a priori exhibits memory effects in the form on non-localities in time. We propose to extend the formalism and its corollaries to a broad class of out-of- equilibrium processes. We show that the structure of the Generalized Langevin Equa- tion is overall robust but must be adapted to account for the non-stationary dynamics [1,2]. The function that controls memory effects the stochastic term are related through a relation that can be associated to fluctuation-dissipation theorems. This formalism is very convenient to study two-time auto-correlation functions for which we can write a self-consistent differential equation as well. We finally show a new method to evaluate the memory function from numerical or experimental data [3]. [less ▲]

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See detailPractical aspects of the Bank-Weiser estimator implementation and Biomechanics applications.
Bulle, Raphaël UL; Bordas, Stéphane UL; Chouly, Franz et al

Scientific Conference (2020, July)

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See detailLuxembourg: Conflict of Qualification and partnership income: autonomous and common interpretation
Haslehner, Werner UL

in Lang, Michael; Rust, Alexander; Owens, Jeffrey (Eds.) et al Tax Treaty Case Law Around the Globe 2019 (2020)

The dispute giving rise to the judgment discussed in this chapter concerns treaty interpretation in the presence of deviating national definitions of business income and thus touches upon a number of long ... [more ▼]

The dispute giving rise to the judgment discussed in this chapter concerns treaty interpretation in the presence of deviating national definitions of business income and thus touches upon a number of long-standing questions surrounding the meaning of article 3(2) of the OECD Model, the importance of common interpretation, and the resolution of qualification conflicts. The issue concerned arose from a different qualification, under domestic law, of the income earned by limited partnerships engaged in private asset management activity: while the income in question was treated as interest and capital gains from a German perspective, Luxembourg’s domestic law applied a legal fiction which resulted in it being treated as business income. In the case, Luxembourg’s highest administrative court (Cour administrative, hereinafter the “Court”) took advantage of Luxembourg and German case law, scholarship and the common legislative heritage of both countries in order to resolve the different income classification under each country’s domestic law. The court did not, however, make use of the Commentary on the OECD Model in this instance. [less ▲]

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See detailAutomated Repair of Feature Interaction Failures in Automated Driving Systems
Ben Abdessalem, Raja; Panichella, Annibale; Nejati, Shiva UL et al

in Proceedings of the 29th ACM SIGSOFT International Symposium on Software Testing and Analysis (ISSTA 2020) (2020, July)

In the past years, several automated repair strategies have been proposed to fix bugs in individual software programs without any human intervention. There has been, however, little work on how automated ... [more ▼]

In the past years, several automated repair strategies have been proposed to fix bugs in individual software programs without any human intervention. There has been, however, little work on how automated repair techniques can resolve failures that arise at the system-level and are caused by undesired interactions among different system components or functions. Feature interaction failures are common in complex systems such as autonomous cars that are typically built as a composition of independent features (i.e., units of functionality). In this paper, we propose a repair technique to automatically resolve undesired feature interaction failures in automated driving systems (ADS) that lead to the violation of system safety requirements. Our repair strategy achieves its goal by (1) localizing faults spanning several lines of code, (2) simultaneously resolving multiple interaction failures caused by independent faults, (3) scaling repair strategies from the unit-level to the system-level, and (4) resolving failures based on their order of severity. We have evaluated our approach using two industrial ADS containing four features. Our results show that our repair strategy resolves the undesired interaction failures in these two systems in less than 16h and outperforms existing automated repair techniques. [less ▲]

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See detailLa protection des droits fondamentaux au Luxembourg : Le rôle des institutions nationales des droits de l'homme et de la société civile
Baglayan, Basak UL

in Gerkrath, Jörg (Ed.) La défense des droits et libertés au Grand-Duché de Luxembourg (2020)

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See detailReconstructing the Treaty Network – the EU law perspective (EU report IFA Congress 2020)
Haslehner, Werner UL; García Prats, Alfredo; Heydt, Volker et al

in Duff, David; Gutmann, Daniel (Eds.) Cahiers de droit fiscal international 2020: Reconstructing the treaty network (2020)

European Union law overlaps and interacts with both the OECD’s Base Erosion and Profit Shifting project (BEPS) and its implementation and the member states’ tax treaties between them and with third ... [more ▼]

European Union law overlaps and interacts with both the OECD’s Base Erosion and Profit Shifting project (BEPS) and its implementation and the member states’ tax treaties between them and with third countries, and there is also an area where all three fields meet. This intersection of EU law, BEPS and member states’ (mostly) bilateral tax treaties is the subject of this report. [less ▲]

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See detailThe development and validation of a short conscientiousness questionnaire for large-scale educational assessment
van der Westhuizen, Lindie UL; Franzen, Patrick UL; Arens, A. Katrin et al

Scientific Conference (2020, July)

Conscientiousness and its subfacets are related to multiple learning-related outcomes. MacCann, Duckworth and Roberts (2009) developed a questionnaire measuring seven subfacets of conscientiousness with ... [more ▼]

Conscientiousness and its subfacets are related to multiple learning-related outcomes. MacCann, Duckworth and Roberts (2009) developed a questionnaire measuring seven subfacets of conscientiousness with 59 items. However, the resources required to complete such long scales often renders it unsuitable for large-scale educational assessment. Consequently, an economic and psychometrically sound conscientiousness questionnaire that is specifically customized for this context is needed. We developed and validated a short version of the MacCann et al. (2009) questionnaire. In study 1, French and German adaptations of the questionnaire were administered to a representative dataset comprising all ninth-graders in Luxembourg (N1=6325, Cohort 2017). Using an exhaustive search algorithm, we identified the optimal combination of four items for each subfacet by simultaneously considering three criteria: goodness of fit, factor saturation, and scalar measurement invariance across the German and French versions. In study 2, we validated our short 28-item questionnaire on a second, independent sample comprising 6,279 Luxembourgish ninth-graders (Cohort 2018). A 7-factor model assuming separate factors for each subfacet obtained acceptable fit (CFI=.93, RMSEA=.04, SRMR=.06). The criterion validity for each subfacet was tested by examining the relation to standardized achievement tests (SATs). In study 3, drawing on a dataset of 275 tenth-graders (linked longitudinally with the ninth-grade data from study 1), evidence of predictive validity (i.e., school grades) was examined. The subfacets of industriousness, caution and perfectionism showed the strongest relations with both SATs (study 2) and school grades (study 3). Our study delivered a short, valid and reliable questionnaire for the assessment of seven conscientiousness facets in the educational context. The scale is invariant across the German and French language versions and its brevity makes it suitable for large-scale educational assessment. [less ▲]

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See detailImproving open data accessibility through package development and community work
Kozlowski, Diego UL; Tiscornia, Pablo; Weksler, Guido et al

Poster (2020, July)

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See detailMeasuring multiculturalism: Scale development and validation in different languages and contexts (Cancelled due to COVID-19)
Stogianni, Maria UL; Schmidt, Lea Marie; Murdock, Elke UL et al

Scientific Conference (2020, July)

Increased migration has led to the formation of culturally diverse societies in most places around the world. Consequently, individuals of different ethnic backgrounds need to find ways of living together ... [more ▼]

Increased migration has led to the formation of culturally diverse societies in most places around the world. Consequently, individuals of different ethnic backgrounds need to find ways of living together. Multiculturalism as an ideology and policy framework proposes several strategies to deal with increasing diversity and to improve intergroup relations in multicultural contexts. Berry (2016) emphasizes two important aspects of multiculturalism: a) diversity, the presence of ethnocultural diversity in the population and b) equity, the right for equal participation of all cultural groups in the society. Both diversity and equity are necessary conditions for the success of multicultural policies. Culturally heterogeneous communities that do not support inclusion and equitable participation of all groups, face the negative consequences of segregation. In line with this notion, an international research consortium developed a revised version of the Multicultural Ideology Scale (Berry & Kalin, 1995) to assess support for cultural diversity. The scale aims to distinguish various attitudinal dimensions of multiculturalism, relevant to the acceptance and social inclusion of different ethnocultural groups: Cultural Maintenance, Equity/Inclusion, Social interaction, Essentialistic Boundaries, Extent of Differences, and Conflictual Relations. The present study is part of this cross-cultural research project, which aims to develop and test the psychometric properties of the scale in different language versions and cultural contexts. The survey will be administered to a large sample of native German citizens with different demographic characteristics. We aim to understand the attitude of native citizens towards cultural diversity and their willingness to interact with members of ethnic minority groups. We will also investigate the relationship between multicultural attitudes and individual difference variables, such as ethnic group attachment and social dominance orientation. Findings from all the country studies in the project will enable us develop a universal measure of multicultural attitudes that can be applied in multiple groups and contexts. [less ▲]

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See detailHistorical roots and strands of physical education and school sport development in Europe
Naul, Roland; Scheuer, Claude UL

in Naul, Roland; Scheuer, Claude (Eds.) Research on Physical Education and School Sport in Europe (2020)

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See detailResearch on Physical Education and School sport in Europe - Introduction
Naul, Roland; Scheuer, Claude UL

in Naul, Roland; Scheuer, Claude (Eds.) Research on Physical Education and School Sport in Europe (2020)

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See detailComparative analysis of physical education and school sport development and research in Europe
Naul, Roland; Scheuer, Claude UL

in Naul, Roland; Scheuer, Claude (Eds.) Research on Physical Education and School Sport in Europe (2020)

Detailed reference viewed: 33 (1 UL)