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See detailIntergenerational relations and the sense of belonging in the context of migration – What do second generation young adults learn from their first generation parents (and vice versa)?
Albert, Isabelle UL; Barros Coimbra, Stephanie UL

Scientific Conference (2020, July 02)

Migration is a life transition that entails changes in social and emotional belonging, and an important developmental task for migrants is the establishment of bonds in the receiving country. While first ... [more ▼]

Migration is a life transition that entails changes in social and emotional belonging, and an important developmental task for migrants is the establishment of bonds in the receiving country. While first generation immigrants have been enculturated in the culture of origin before being confronted with the host culture, their children grow up in two or multiple different value systems and cultures during their formative years. How does this so-called second-generation experience their cultural belonging and how are their identity constructions related to their parents’? This was a main topic of the FNR-funded IRMA project which compared first and second generations from Portuguese migrant families in the Luxembourgish multicultural context with regard to their cultural identity, intergenerational relations and transmission processes. The sample of the present study consists of family dyads resp. Triads comprising n = 70 PT mothers and n = 65 PT fathers over the age of 50 who arrived about 30 years ago to Luxembourg, together with n = 72 PT young adults (mean age M = 28. 2, SD = 7. 9; 61. 1% female) already born or grown up in Luxembourg. By use of a newly developed measure of cultural attachment to Luxembourg and Portugal, we examine the intergenerational continuity in the sense of cultural belonging and identify mediators in the transmission process such as relationship quality and the motivation to transmit or accept parental values. Results will be discussed with reference to an integrative model on intergenerational relations in the light of age and migration experiences. [less ▲]

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See detailMixed Methods to Empower Migrant Youth in Vulnerable Conditions: a place-based, migrant-centered international project
Gilodi, Amalia UL; Bissinger, Jutta UL; Albert, Isabelle UL et al

Scientific Conference (2020, July 02)

In this methodological paper, we will present a newly established international and interdisciplinary research project focusing on empowering young migrants in vulnerable conditions and supporting ... [more ▼]

In this methodological paper, we will present a newly established international and interdisciplinary research project focusing on empowering young migrants in vulnerable conditions and supporting integration strategies within the EU in a unique and comprehensive mixed methods research design combining secondary analysis with qualitative empirical data. The triangulation of results from different sources and methods will help to provide a deeper insight into the integration processes from the perspectives of migrants, host nationals and experts. In the framework of MIMY, financed by H2020 and comprising 12 consortium members from 11 disciplines and 9 European countries, we will focus on various challenges of integration strategies of young migrants in vulnerable conditions, considering different sectors from the perspective of different actors, at macro-, meso- and micro-levels. This will help to explain the successes and failures of integration over migrants’ life courses as well as the long-term consequences for migrant communities and the hosting society. The research design of MIMY follows several steps: 1) desk research - literature review, content analysis, mapping exercises, 2) quantitative secondary data analysis, policy and discourse analysis, 3) qualitative empirical studies, and 4) synthesizing and synergizing all findings and drawing policy recommendations. The present paper will outline how this project integrates qualitative and quantitative methods by using an innovative, multi-method approach (e.g. policy analyses, delphi study, focus groups, in-depth qualitative interviews, participatory action research) in order to explore vulnerability and resilience of young migrants in cross-national perspectives combining policy analysis with demographic, sociological, psychological, discursive, and ethnographic analysis. [less ▲]

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See detailCrossing borders – feeling connected? Exploring the sense of belonging
Murdock, Elke UL; Albert, Isabelle UL

Scientific Conference (2020, July 02)

Migrants find themselves living in a society with different practices, norms and values to their culture of origin. Migration is a life transition that entails changes in social and emotional belonging ... [more ▼]

Migrants find themselves living in a society with different practices, norms and values to their culture of origin. Migration is a life transition that entails changes in social and emotional belonging. This panel focuses on the question how migrants establish bonds in their receiving country. How do migrants negotiate their sense of belonging to the host and / or home country? What determines the strength of attachment to either of both? The present panel brings together researchers from three different countries who focus on the sense of belonging of different migrant populations. First, Isabelle Albert presents findings from a research project that examined intergenerational value transmission and cultural attachment to Portugal and Luxembourg among first and second-generation migrants in Luxembourg. Intergenerational relationships and migration are also the focus of Carlos Barros’ presentation. He presents findings from a qualitative study on intergenerational solidarity and maps solidarity patterns for different migrant groups. Jean Décieux presents identity constructions of international mobiles. The German Emigration and Remigration Panel study (GERPS) covers the migration trajectories of about 11,000 individuals. Patterns of belonging will be highlighted and discussed. Débora Maehler presents insights from a meta-analysis on the sense of belonging of young immigrants in Germany. Factors determining the strength of belonging to either their country of origin or Germany will be explored. The panel closes with a contribution by Elke Murdock on the host country perspective. She presents results from a quantitative study on criteria and predictors for the acceptance of new citizens as belonging by natives. [less ▲]

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See detailDo they belong? Perception of new citizens – a host country perspective
Murdock, Elke UL

Scientific Conference (2020, July 02)

In 30 years, Luxembourg’s population grew from 500,000 in 2010 to 614,000 in 2019. This growth is largely due to immigration. The foreign population percentage reached 47,5% on 1st of January 2019 – a ... [more ▼]

In 30 years, Luxembourg’s population grew from 500,000 in 2010 to 614,000 in 2019. This growth is largely due to immigration. The foreign population percentage reached 47,5% on 1st of January 2019 – a slight decline (-0.4%) on the previous year. This decline is in fact due to the rise in naturalizations. Since the reform of the citizenship law in 2008, Luxembourg has experienced a steady rise in naturalizations – which amounted to 684 in 2000, 4311 in 2010 and reached 11,876 in 2018. In terms of formal criteria, these new citizens belong to Luxembourg. They have to take part in parliamentary elections and can stand themselves as candidates. Yet how are these new Luxembourgish citizens perceived by the native population? Are they perceived as part of the in-group? To investigate this question, we conducted a quantitative study among 253 native Luxembourgers (65% women, Mage= 34.6, SD = 15.6) – all of whom held Luxembourgish citizenship and the majority (97%) were born in Luxembourg. We assessed the attitude towards a diverse society in general and Luxembourg in particular, adapted the allophilia scale to measure the positive attitude towards the outgroup new-Luxembourgers and assessed the perceived degree of overlap between native and new Luxembourgers. Just over half of the participants (57%) perceive a degree of overlap – which is in turn predicted by openness towards diversity and acceptance of new Luxembourgers. Implications of these findings for inclusive societies will be discussed. [less ▲]

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See detailImmigration - the host country perspective
Murdock, Elke UL; Sölvason, Ómar

Scientific Conference (2020, July 01)

With 35.5 immigrants per 1000 inhabitants, Iceland had the third highest number of immigrants/ inhabitants in Europe in 2017. Until the turn of the century, the foreign population percentage in Iceland ... [more ▼]

With 35.5 immigrants per 1000 inhabitants, Iceland had the third highest number of immigrants/ inhabitants in Europe in 2017. Until the turn of the century, the foreign population percentage in Iceland was around 2%. In the last 5 years, this percentage has risen steadily to over 10% in 2018. How is this rapid rise in immigration experienced by the host country population? What is the attitude towards this increasingly plurally composed society? The Inclusive Societies – Iceland project investigated both, the immigrants’ situation in Iceland, but also the native populations’ attitude towards immigration and immigrants. It is important to take the host country perspective into consideration, as diversity ideologies will also determine the acculturation options for minorities. A quantitative survey was conducted among 3630 native Icelanders (51.1% women, Mean Age = 50.8, SD = 15.6), spread across all regions of Iceland. The questions covered satisfaction with life in Iceland in different domains but included also specific questions about the attitudes towards immigrants and enquired about contact with immigrants. The results indicate that this culture contact takes place – with over two thirds of participants indicating that they have invited immigrants to their home a few (34.4%) or many times (34.4%). Slightly less participants have been invited to immigrants’ homes (few times 33.6%, often 27.9%). Predictors for openness towards multiculturalism will be presented and discussed. We will also outline the domains with little and considerable variance among respondents concerning cultural practice and attitude to immigration and close with a discussion of policy implications. [less ▲]

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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)

The rest position, as well as any associated internal stresses in soft organs, are usually unknown when solving biomechanics problems. In addition, the initial geometry of a specific organ, obtained from ... [more ▼]

The rest position, as well as any associated internal stresses in soft organs, are usually unknown when solving biomechanics problems. In addition, the initial geometry of a specific organ, obtained from medical images, is affected by external forces. An example is breast MRI performed prior to cancer surgery. During the imaging routine, the breast is elongated in prone position in order to better view the tumor. However, during surgery, the patient is in supine position, which causes the breast to rest in a completely different state. To simulate this state from the prone stance, the rest configuration is needed as well as the pre-stress mapping of the organs [1]. To tackle this problem, iterative algorithms have been proposed such as Sellier’s method [2]. In this fixed-point approach, the rest configuration is updated by multiple forward calculations then repeated until the error (between the updated and target configuration) reaches an established threshold. The method presents many benefits e.g. easy implementation and fast convergence. However, convergence issues appear at large deformations induced for instance by hyperelastic material formulations. In this work, we develop a simple formulation and a robust solution procedure for inverse deformation problems in soft-tissue biomechanics using the FEniCS Project finite element solver. In contrast with iterative algorithms, our method can solve with a single simulation the rest position without computing multiple solutions of the forward problem. For a fixed convergence tolerance, our physics-based algorithm is about ten times faster and better handles large deformations than Sellier’s method [2]. Moreover, no additional direct deformation simulations from the rest configuration are required to compute stresses in the organ. The framework is implemented within an open-source pipeline enabling the seamless, fully parallelized, direct and inverse deformation simulation of organs directly from segmented images. The pipeline is also designed to be flexible to user’s needs: for example, it allows the modification of the constitutive models by changing a single line of code. [less ▲]

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See detailA propensity score matching approach on predicting academic success of primary school students
Wollschläger, Rachel UL; Hornung, Caroline UL; Sonnleitner, Philipp UL et al

Scientific Conference (2020, July)

School career and academic achievement are known to greatly affect an individual’s path through life (e.g., Trapmann, Hell, Weigand & Schuler, 2007; Jimerson, 2001). In Luxembourg, recent findings ... [more ▼]

School career and academic achievement are known to greatly affect an individual’s path through life (e.g., Trapmann, Hell, Weigand & Schuler, 2007; Jimerson, 2001). In Luxembourg, recent findings indicate that at school entrance (i.e., the beginning of Grade 1) the majority of the students achieve or even surpass the required minimum level of core competencies such as mathematics and early literacy (Hoffmann, Hornung, Gamo, Esch, Keller, & Fischbach, 2018). However, in Grade 3 (i.e., after the first two years of elementary school) many students do no longer achieve the required minimum level of competencies in math and literacy (ibid.). Especially students with another language background than (any of) the official languages in Luxembourg (Luxembourgish, German, and French) and those socio-economically disadvantaged were found to be more likely not to obtain the competency level (ibid.). The current study aims to investigate which specific factors may facilitate (or hinder) learning progression by using longitudinal data of the Luxembourg School Monitoring Programme Épreuves Standardisées from Grade 1 (2014, 2015) to Grade 3 (2016, 2017, 2018). More specifically, students with irregular pathways (i.e., those who experienced grade retention) will be identified as treatment group and compared to a stratified control group of students following regular pathways. For each student of the treatment group, one or more students from the control group will be matched through propensity score matching, a matching procedure based on logistic regression, according to different pre-sets of variables. In a second step, the two groups will be compared in regards to competency levels as well as to socio-emotional context variables such as family background, student-teacher interaction, and school satisfaction aiming at identifying characteristics potentially facilitating (or hindering) a student’s school career. [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 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 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 detailTopics, buckets, and psychiatry. On the collective creation of a corpus exploration tool
Biryukov, Maria UL; Kalyakin, Roman; Andersen, Eva UL et al

Scientific Conference (2020, July)

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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)

Detailed reference viewed: 99 (8 UL)
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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 detailMeasuring Executive Functions and their Relations to Mathematical Skills in Preschool Children: A Meta-Analysis
Emslander, Valentin UL; Scherer, Ronny

Scientific Conference (2020, July)

Introduction: Executive functions (inhibition, attention shifting, working memory) are linked to mathematical skills in school students and adults. This link is particularly important because performance ... [more ▼]

Introduction: Executive functions (inhibition, attention shifting, working memory) are linked to mathematical skills in school students and adults. This link is particularly important because performance in school mathematics is predictive of various competencies later in life. While some researchers argue that tests of executive functions and mathematical skills measure the same underlying construct, others argue that they measure distinct but correlated constructs. Also, evidence on the differentiation of cognitive skills over time exists. Clarifying the relation between executive functions and mathematical skills is, however, challenging, especially because preschoolers cannot fill in commonly used questionnaires that require them to read. As a consequence, researchers have to resort to behavioral, verbal, apparatus-, or computer-based assessments of executive functions. Objectives/Methodology: With this meta-analysis of 26 studies containing 238 effect sizes, we examined the link between executive functions and early mathematical skills for a total sample of 24,256 preschool children. Specifically, we synthesized the corresponding correlations and sought to clarify which executive function assessments were used for preschool children and how the assessment characteristics may moderate the correlation between executive functions and mathematical skills. Results: Utilizing three-level random-effects meta-analysis, we found a moderate correlation between executive functions and mathematical skills in preschool children, r = 0.35. The type of assessment (behavioral, verbal, apparatus-, or computer-based assessments) did not moderate this relation. Differentiating between the three executive functions revealed average correlations of r = 0.31 between math and inhibition, r = 0.38 between math and attention shifting, and r = 0.36 between math and updating. These analyses will be supplemented by further moderator analyses. Conclusions: Our findings support the significant link between executive functions and mathematical skills in preschoolers—yet, the average correlations do not suggest that both measures are identical. Results will be discussed against the background of deployed assessments and testing environments. [less ▲]

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See detailWhen historians create their archives: the making of covidmemory project
Brüll, Christoph UL

Scientific Conference (2020, June 30)

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See detailSTEAM in special needs education in an elementary school in Luxemburg
Haas, Ben; Lavicza, Zsolt; Kreis, Yves UL

Scientific Conference (2020, June 25)

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See detailInnovative uses of technologies for STEAM education in elementary schools in Luxemburg
Haas, Ben; Kreis, Yves UL

Scientific Conference (2020, June 23)

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See detailDevelopment of innovative concrete mixtures aggregates
Chewe Ngapeya, Gelen Gael UL; Waldmann, Daniele UL

Scientific Conference (2020, June 22)

Detailed reference viewed: 126 (8 UL)
See detailModerator of the Session 'Politics'
Venken, Machteld UL

Scientific Conference (2020, June 19)

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See detailParallel coupling strategy for multi-physics applications in eXtended Discrete Element Method
Besseron, Xavier UL; Rousset, Alban UL; Mainassara Chekaraou, Abdoul Wahid UL et al

Scientific Conference (2020, June 18)

Multi-physics problems containing discrete particles interacting with fluid phases are widely used industry for example in biomass combustion on a moving grate, particle sedimentation, iron production ... [more ▼]

Multi-physics problems containing discrete particles interacting with fluid phases are widely used industry for example in biomass combustion on a moving grate, particle sedimentation, iron production within a blast furnace, and selective laser melting for additive manufacturing. The eXtended Discrete Element Method (XDEM) uses a coupled Eulerian-Lagrangian approach to simulate these complex phenomena, and relies on the Discrete Element Method (DEM) to model the particle phase and Computational Fluid Dynamics (CFD) for the fluid phases, solved respectively with XDEM and OpenFOAM. However, such simulations are very computationally intensive. Additionally, because the DEM particles move within the CFD phases, a 3D volume coupling is required, hence it represents an important amount of data to be exchanged. This volume of communication can have a considerable impact on the performance of the parallel execution. To address this issue, XDEM has proposed a coupling strategy relying on a co-located partitioning. This approach coordinates the domain decomposition of the two independent solvers, XDEM and OpenFOAM, to impose some co-location constraints and reduce the overhead due to the coupling data exchange. This strategy for the parallel coupling of CFD-DEM has been evaluated to perform large scale simulations of debris within a dam break flow. [less ▲]

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See detailMaking History Together: Public History and Digital Memories during COVID-19
Cauvin, Thomas UL

Scientific Conference (2020, June 17)

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See detailNational responses to date during the COVID-19 crisis in the areas of migration and asylum
Sommarribas, Adolfo UL

Scientific Conference (2020, June 17)

The COVID-19 took by surprise most Member States of the European Union, as they underestimated the rapid spread of the contagion in the continent. The response of the Member States was asymmetrical ... [more ▼]

The COVID-19 took by surprise most Member States of the European Union, as they underestimated the rapid spread of the contagion in the continent. The response of the Member States was asymmetrical, individualistic and significantly slow. The first measures taken were to close down the internal borders. The response of the European Union was even slower to the point that and it was not until March 17th 2020 that the external borders were closed. These actions affected legal migration into the European Union from four perspectives: 1) it affected the mobility of those third country nationals who were on temporary stay in the Member States; 2) the entry of third country nationals to do seasonal work; 3) the entry and stay of legal migrants; and 4) the status quo of the third country nationals already residing in the Member States, especially those who have a loss of income. This article will deal with the measures taken by Member States on who to manage the immigration services during the crisis as well as the measures taken in order to deal with overstayers, seasonal workers and other legal migrants. Finally, we will focus in the vulnerable situation that third-country national salaried workers are exposed due to the loss of income or loss of employment in the Member States and the risk of being returned to their country of origin. This presentation will also analyse the access to unemployment benefits. [less ▲]

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See detailNetworked Governance, Enabling Multistakeholder Cooperation
Van Weyenbergh, Gael; Bouillard, Maxime; Wieneke, Lars UL et al

Scientific Conference (2020, June 12)

This workshop gathering 10 participants focused on finding the root cause for the need and purpose for multistakeholder cooperation between social scientists and civil society.

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See detailThe relevance of risk disclosure and the role of readability and comparability
Weber, Véronique UL; Muessig, Anke UL

Scientific Conference (2020, June 05)

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See detailIdentifiability of Finite Mixture Models
Noel, Cédric; Schiltz, Jang UL

Scientific Conference (2020, June 04)

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See detailTrajeR an R package for the clustering of longitudinal data
Noel, Cédric; Schiltz, Jang UL

Scientific Conference (2020, June 04)

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See detailSuccessive Convex Approximation for Transmit Power Minimization in SWIPT-Multicast Systems
Gautam, Sumit UL; Lagunas, Eva UL; Kisseleff, Steven UL et al

Scientific Conference (2020, June)

We propose a novel technique for total transmit power minimization and optimal precoder design in wireless multi-group (MG) multicasting (MC) systems. The considered framework consists of three different ... [more ▼]

We propose a novel technique for total transmit power minimization and optimal precoder design in wireless multi-group (MG) multicasting (MC) systems. The considered framework consists of three different systems capable of handling heterogeneous user types viz., information decoding (ID) specific users with conventional receiver architectures, energy harvesting (EH) only users with non-linear EH module, and users with joint ID and EH capabilities having separate units for the two operations, respectively. Each user is categorized under unique group(s), which can be of MC type specifically meant for ID users, and/or an energy group consisting of EH explicit users. The joint ID and EH users are a part of the (last) EH group as well as any one of the MC groups distinctly. In this regard, we formulate an optimization problem to minimize the total transmit power with optimal precoder designs for the three aforementioned scenarios, under constraints on minimum signal-to-interference-plus-noise ratio and harvested energy by the users with respective demands. The problem may be adapted to the well-known semi-definite program, which can be typically solved via relaxation of rank-1 constraint. However, the relaxation of this constraint may in some cases lead to performance degradation, which increases with the rank of the solution obtained from the relaxed problem. Hence, we develop a novel technique motivated by the feasible-point pursuit and successive convex approximation method in order to address the rank-related issue. The benefits of the proposed method are illustrated under various operating conditions and parameter values, with comparison between the three above-mentioned scenarios. [less ▲]

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See detailCognitive cost of two- and single digit transcoding in the second language of math learning in bilinguals of different ages
Lachelin, Remy UL; Van Rinsveld, Amandine; Poncin, Alexandre et al

Scientific Conference (2020, June)

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See detailBoosting SWIPT via Symbol-Level Precoding
Gautam, Sumit UL; Krivochiza, Jevgenij UL; Haqiqatnejad, Alireza UL et al

Scientific Conference (2020, May 29)

In this paper, we investigate a simultaneous wireless information and power transmission (SWIPT) system, wherein a single multi-antenna transmitter serves multiple single-antenna users which employ the ... [more ▼]

In this paper, we investigate a simultaneous wireless information and power transmission (SWIPT) system, wherein a single multi-antenna transmitter serves multiple single-antenna users which employ the power-splitting (PS) receiver architecture. We formulate a Symbol-Level Precoding (SLP) based transmit power minimization problem dependent on the minimum signal-to-interference-plus-noise ratio (SINR) and energy harvesting (EH) thresholds. We solve the corresponding non-negative convex quadratic optimization problem per time frame of transmitted symbols and study the benefits of proposed design under Zero-Forcing (ZF) Precoding, Direct Demand SLP (DD-SLP), and Squared-Root Demand SLP (RD-SLP) techniques. A static PS-ratio is fixed according to the SINR and EH demands to enable the segregation of intended received signals for information decoding (ID) and EH, respectively. Numerical results show the property conservation of SINR-enhancement via SLP at the ID unit while increasing the harvested energy at each of the end-users. [less ▲]

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See detailZur Bedeutsamkeit des Sportunterrichtes: Der Einfluss der Motivation im Sportunterricht auf den außerschulischen Kontext - ein longitudinaler Ansatz
Hutmacher, Djenna UL; Eckelt, Melanie UL; Bund, Andreas UL et al

Scientific Conference (2020, May 22)

Hintergrund: Hinsichtlich der kontinuierlichen Abnahme der körperlichen Aktivität von Kindern und Jugendlichen, rückt die Stärkung der Motivation als Ansatz zur Sportaktivierung immer mehr in den Fokus ... [more ▼]

Hintergrund: Hinsichtlich der kontinuierlichen Abnahme der körperlichen Aktivität von Kindern und Jugendlichen, rückt die Stärkung der Motivation als Ansatz zur Sportaktivierung immer mehr in den Fokus (Standage, Duda, & Ntoumanis, 2005). In ihrem trans-kontextuellen Modell postulieren Hagger und Chatzisarantis (2016) einen Zusammenhang zwischen intrinsischer Motivation im Sportunterricht und in der Freizeit. Dabei spielt die Unterstützung der Bedürfnisse durch die Sportlehrkraft eine wichtige Rolle, um die intrinsische Motivation der SchülerInnen im Sportunterricht und längerfristig in der Freizeit zu fördern, welche ein selbstbestimmtes körperliches Aktivitätsverhalten begünstigen soll. In der vorliegenden Studie wurden diese Annahmen in erweiterter Form im Längsschnitt geprüft. Methode: Es wurden N = 1681 SchülerInnen zwischen 10 und 23 Jahren (M = 14.7 Jahre; 50.7% weiblich) aus 14 luxemburgischen Schulen zu Beginn des Schuljahres (t1) und sechs Monate später am Ende des Schuljahres (t2) getestet. Neben der wahrgenommenen Bedürfnisunterstützung (Standage, Duda, & Ntoumanis, 2005) wurden die Motivationsregulation im Sportunterricht (PLOC-R; Vlachopoulos, Katartzi, Kontou, Moustaka, & Goudas, 2011) und in der Freizeit (BREQ-II; Markland & Tobin, 2004), sowie alle Konstrukte der Theorie des geplanten Handelns (Ajzen, 1991), und die körperliche Aktivität erhoben. Ergebnisse: Cross-Lagged-Panel Analysen zeigen, dass die intrinsische Motivation im Sportunterricht (t1) kontextübergreifend die intrinsische Motivation zur körperlichen Aktivität in der Freizeit (t2) vorhersagt (β = .12, p < .05). Selbiger Befund konnte auch für die Amotivation gefunden werden (β = .15, p < .05). Allerdings wurde kein kontextübergreifender Zusammenhang der extrinsischen Motivation gefunden (p > .05). Entgegen der postulierten Richtung des Modells, sagt eine höhere intrinsische Motivation der SchülerInnen (t1) eine höhere Wahrnehmung der Unterstützung der Grundbedürfnisse durch den Sportlehrer (t2) vorher (β = .10, p < .05). Die intrinsische Motivation in der Freizeit (t1) hängt zudem mit der Einstellung (β = .24, p < .05), subjektiven Norm (β = .11, p < .05), wahrgenommenen Verhaltenskontrolle (β = .12, p < .05), Intention (β = .16, p < .05) und der körperlichen Aktivität (β = .18, p < .05) zu t2 zusammen. Schlussfolgerung: Die Befunde bestätigen die Bedeutsamkeit des Sportunterrichts in dem Sinne, dass die intrinsische Motivation im Sportunterricht die Wahrnehmung der Bedürfnisunterstützung des Sportlehrers erhöht und kontextübergreifend mit der intrinsischen Motivation im Freizeitbereich zusammenhängt, welche wiederum ein selbstbestimmtes körperliches Aktivitätsverhalten in der Freizeit positiv bedingt. Eine Interventionsstudie im Sportunterricht bekräftigt diese Befunde in dem Sinne, dass die Autoren positivere Effekte fanden, wenn, zusätzlich zur alleinigen Autonomieunterstützung, internale Zielsetzungen in der Lehre eingesetzt wurden (Cheon, Reeve, & Song, 2019). [less ▲]

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See detailFlucht- und Wanderungsbewegungen in Ostbelgien 1944/45
Brüll, Christoph UL

Scientific Conference (2020, May 13)

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Peer Reviewed
See detailClimate SMART Agriculture: How well does the agricultural sector in Luxembourg perform in terms of climate change?
Evelyne, Stoll; Schader, Christian; Bohn, Torsten et al

Scientific Conference (2020, May 04)

In Luxembourg, the agricultural sector was responsible for 711.7 Gg CO2-equivalents in 2016, which corresponds to 6.95 % of the total country greenhouse gas (GHG) emissions. Over 50 % of the farms are ... [more ▼]

In Luxembourg, the agricultural sector was responsible for 711.7 Gg CO2-equivalents in 2016, which corresponds to 6.95 % of the total country greenhouse gas (GHG) emissions. Over 50 % of the farms are specialist grazing livestock farms. The beef and cattle milk production account globally together for over 60 % of the sector’s global emissions. Thus, the climate impact of the whole agricultural sector in Luxembourg can be significantly lowered by reducing the GHG emissions of the specialist grazing livestock sector. However, beyond farm type, the GHG emissions of a farm are also influenced by other factors, such as management systems and farming practices. To enable a transition towards a more climate-positive agriculture, insights into the sustainability performance in terms of climate change are needed. The aim of this study is to determine the current sustainability performance of the Luxembourgish specialist grazing livestock sector in terms of climate change. The climate impact of the different specialist grazing livestock farm types (OTE (orientation technico-économique) 45 - Specialist dairying; OTE 46 - Specialist cattle - rearing and fattening and OTE 47 - Cattle - dairying, rearing and fattening combined) and of different management systems (conventional or organic) was assessed at farm-level. Furthermore, the relationship between the sustainability performance in terms of climate change and other areas of sustainability is being studied. Farming practices of 60 farms typical for Luxembourg in regard to their share of arable land and permanent grassland (OTE 45: 3 farms; OTE 46: 15; OTE 45: 11; Conventional: 44; Organic: 16) and their respective sustainability implications were assessed in 2019 according to the FAO SAFA Guidelines (Guidelines for the Sustainability Assessment of Food and Agriculture Systems, 2014) using the Sustainability Monitoring and Assessment RouTine (SMART)-Farm Tool (v5.0). Organic farms were highly overrepresented, with 26.7 % in the sample compared to 5 % of all Luxembourgish farms. The data was collected during a farm visit and a 3 h interview with the farm manager. The impact of management system and farm type on the SAFA-goal achievement for the sub-theme Greenhouse Gases (GHG) were studied. The results show that the sustainability performances of the participating farms were moderate to good. Goal achievement for the sub-theme GHG was moderate and did not differ significantly between the three farm types (OTE 45: 53.3 % ±3.9 SD goal achievement; OTE 46: 55.6 % ±7.3 SD; OTE 47: 54.6 % ±6.9 SD). Organic farms showed a significantly higher mean goal achievement for GHG than conventional farms (p-value < 0.001) (organic: 58.3 % ±6.0 SD; conventional: 52.6 % ±4.4 SD). For indicators positively impacting GHG, the organic and the OTE 46 farms had generally higher ratings. Correlations between GHG and the other sub-themes were mainly in the Environmental Integrity dimension, showing that implementing climate-positive farming practices can also improve other ecological aspects. The indicator analysis identified the following linchpins: increase in protein autarky, closing of farming cycles and holistic approach with strategic decision making leading to harmonized actions towards a sustainable and climate positive farming system. [less ▲]

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See detailPlay the Pain Away: Pain Regulation and Attention in Virtual Reality
Holl, Elisabeth UL; Rischer, Katharina Miriam UL; Battistutta, Layla UL et al

Scientific Conference (2020, May)

Virtual reality (VR) has been shown to be a powerful method to divert attention away from pain (Malloy & Milling, 2010). In an ongoing study (data collection will be finished in late December 2019 ... [more ▼]

Virtual reality (VR) has been shown to be a powerful method to divert attention away from pain (Malloy & Milling, 2010). In an ongoing study (data collection will be finished in late December 2019) healthy participants play the VR game Subnautica in two conditions (high vs. low cognitive load). Pain thresholds and psychophysiological measures are assessed during play to measure the distraction effect. Additionally, pain management will be compared to individual executive functions and attention investigated before playing. [less ▲]

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See detailUnderstanding Moral Decision-Making in Video Games: A Focus Group Study
Holl, Elisabeth UL; Bernard, Steve; Melzer, André UL

Scientific Conference (2020, May)

Moral dilemmas have become increasingly popular in video games, although it is still widely unknown why players might find them pleasurable, how they process dilemmas, and which factors affect the ... [more ▼]

Moral dilemmas have become increasingly popular in video games, although it is still widely unknown why players might find them pleasurable, how they process dilemmas, and which factors affect the processing. Therefore, three different focus groups sessions with expert gamers (N = 16) were conducted. Gamers’ expressions of their experience with meaningful and morally relevant game situations were grouped for relevant topics. Topics are supported by direct quotations from participants of discussion groups, referring to up-to-date video game titles and presented together with respective theoretical assumptions. Results show that besides the game-defining theme of interactivity, statements can be grouped broadly into factors that describe why players engage or disengage in the first place (motivation) and factors that shape the moral interaction itself (influencing factors). In summary, our findings support the notion that moral-decision making in video games is a dynamic interplay between several game and user-dependent variables. Findings provide insights into players’ processing of moral dilemmas in video games, which also offers promising suggestions for future research using experimental setups. [less ▲]

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See detailConstcamer Paintings as Epistemic Images: Early Modern Theaters of Wisdom
Koeleman, Floor UL

Scientific Conference (2020, April 04)

This paper argues, against existing literature, that 17th-cent. constcamer paintings were objects to think with, functioning as the two-dimensional space of artificial memory. In turn, these artworks ... [more ▼]

This paper argues, against existing literature, that 17th-cent. constcamer paintings were objects to think with, functioning as the two-dimensional space of artificial memory. In turn, these artworks complicate conventional definitions of epistemic images more broadly. I focus on an analysis of constcamer paintings accounting for the reception of the ancients and the mnemonic and propaedeutic role of images, entailing concepts such as wonder or thauma (from Greek θεάομαι), the drive to gather knowledge, memory as the locus of this ‘collection’, and recollecting as the intellectual process of interaction with memorized knowledge. The term inventor, referring to the creator of a given collection, is derived from the rhetorical technique for the retrieval of information. The theatre or ‘place for viewing’ provided the physical context for the collected wisdom. Inventors of constcamer paintings – often artists themselves – vitally participated in knowledge formation contributing to contemporary intellectual debates. [less ▲]

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See detailEnforcement coordination between NCAs within in the ESFS
Allegrezza, Silvia UL

Scientific Conference (2020, April 03)

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See detailSelf-concept, interest, and achievement within and across math and verbal domains in first- and third-graders
van der Westhuizen, Lindie UL; Arens, A. Katrin; Keller, Ulrich UL et al

Scientific Conference (2020, April)

The generalized internal/external frame-of-reference (G)I/E model explains the formation of domain-specific motivational-affective constructs through social and dimensional comparisons. We examined the ... [more ▼]

The generalized internal/external frame-of-reference (G)I/E model explains the formation of domain-specific motivational-affective constructs through social and dimensional comparisons. We examined the associations between verbal and math achievement and corresponding domain-specific academic self-concepts (ASCs) and interests for first-graders and third-graders (N=21,192). Positive achievement-self-concept and achievement-interest relations were found within matching-domains in both grades, while negative cross-domains achievement-self-concept and achievement-interest relations were only found for third-graders. These findings suggest that while the formation of domain-specific ASCs and interests seem to rely on social and dimensional comparisons for third-graders, only social comparisons seem to be in operation for first-graders. Gender and cohort invariance was established in both grade levels. Findings are discussed within the framework of ASC differentiation and dimensional comparison theory. [less ▲]

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See detailA professional development course in translanguaging: Challenges and opportunities
Aleksic, Gabrijela UL; Bebić, Džoen Dominique UL

Scientific Conference (2020, April)

In 2017, the new law declared multilingual education mandatory in Luxembourg where there are 65% of 4-year-old language minority children. To support teachers we offer a course in translanguaging that ... [more ▼]

In 2017, the new law declared multilingual education mandatory in Luxembourg where there are 65% of 4-year-old language minority children. To support teachers we offer a course in translanguaging that builds on children’s full linguistic repertoire. The study aims to foster home-school collaboration and children’s cognitive, linguistic and socio-emotional engagement in the classroom. Mixed methods are used: (1) focus groups, questionnaires, and language portraits with teachers, and (2) test in early literacy and numeracy in school and home language followed by video observations with children. Course challenges are teachers’ language separation assumption and high linguistic diversity in schools. Opportunities are teachers’ understanding that the focus is on children and not on languages. Close collaboration with organisational stakeholders is essential. [less ▲]

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See detailStudierende im Schulpraktikum durch Reflexion für inklusive Bildung professionalisieren
Weber, Jean-Marie UL; Rauh, Bernhard; Datler, Margit

Scientific Conference (2020, March)

Die Kursteilnehmenden -kennen Herausforderungen, denen Studierende im Praktikum ausgesetzt sind -wissen um die Bedeutung von Reflexion im Umgang mit Heterogenität bzw. der Gestaltung inklusiver Settings ... [more ▼]

Die Kursteilnehmenden -kennen Herausforderungen, denen Studierende im Praktikum ausgesetzt sind -wissen um die Bedeutung von Reflexion im Umgang mit Heterogenität bzw. der Gestaltung inklusiver Settings -kennen zentrale Konzepte einer psychodynamisch orientierten pädagogischen Arbeit -wissen um Funktionen, Aufgaben und Rollen von Praxisbegleiter/innen in Organisationen (Schulen und Hochschulen/Universitäten) -können zentrale Methoden der Praxisreflexion (Fallarbeit, work-discussion, biographische Reflexion) anwenden, die Studierende bei der Reflexion unterstützen -können das im Forschungsprojekt pro-inklusiv-reflexiv entwickelte Konzept einer Praktikumsbegleitveranstaltung für ihre Lehrveranstaltungen verwendenIn der Fortbildung werden ausgehend von den Herausforderungen des Schulpraktikums für Studierende zentrale Inhalte der Gestaltung inklusiver Bildung, des Professionalisierungsansatzes des reflective practitioner sowie Konzepte und Methoden der Anleitung von Studierenden zur Praxisreflexion vermittelt. Ausgehend von Szenen aus Lehrerfilmen werden Funktionen und Rollen von Lehrkräften und Praxisbegleiter/innen deren (Nicht-)Ausfüllen analysiert. In der Reflexion wird der Schwerpunkt auf eine psychodynamische Perspektive gelegt, die hilft, Mikroprozesse der unterrichtlichen Interaktion und das Erleben von Beteiligten aufzuschließen, das ihr Handeln beeinflusst. Zentrale Konzepte einer psychodynamisch orientierten pädagogischen Arbeit wie Affektregulierung, Übertragung/Gegenübertragung, Abwehr, Widerstand werden vermittelt. Eigene Erfahrungen der Teilnehmenden während der Fortbildung werden aufgegriffen. Während der Fortbildung werden Regionalgruppen gebildet, die nach der Fortbildung vom Projektteam bei der reflexionsbasierten Praktikumsbegleitung gecoacht werden. [less ▲]

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See detailInvestigating the role of individual differences in the analgesic response to a virtual reality game: An exploratory analysis (accepted submission, but symposium was cancelled due to COVID-19)
Rischer, Katharina Miriam UL; Barcatta, Katharina UL; Battistutta, Layla UL et al

Scientific Conference (2020, March)

Virtual reality (VR) has been shown to be a powerful method of redirecting attention away from pain and is increasingly used in clinical settings as a therapeutic tool for pain treatment. Yet, little is ... [more ▼]

Virtual reality (VR) has been shown to be a powerful method of redirecting attention away from pain and is increasingly used in clinical settings as a therapeutic tool for pain treatment. Yet, little is known about the underlying factors that modulate the size of the analgesic response to a VR game, such as task difficulty and inter-individual differences in pain attitude, emotion regulation habits, executive functions and virtual reality experience. Methods: 101 healthy participants played two versions of the VR game Subnautica, differing in cognitive load (low load vs. high load). In the low load condition, participants navigated along a predefined route. In the high load condition, participants additionally memorized a series of single digits presented along the route. Pain heat thresholds as well as psychophysiological measures (ECG, EDA) were recorded during a resting state period prior to, as well as during, the two VR playing sessions. In addition, participants completed several psychological questionnaires and different executive functioning tasks (Corsi block tapping task, flanker task, go/nogo task) prior to the VR sessions. Results: Preliminary results of a subgroup (N = 66) of the total sample revealed that pain thresholds were significantly higher for the VR playing sessions when compared to the resting state period, with a trend of a higher threshold for the high load condition. Moreover, pain catastrophizing and fear of pain were significant predictors of pain threshold measurements. The complete results will be presented at the symposium. Discussion: Results could shed light on the role of inter-individual differences on the efficacy of VR-based distraction from pain, and potentially elucidate factors that render an individual more likely to benefit from VR as a pain-relieving tool. This may have important consequences for the use of VR as a therapeutic treatment for pain patients. [less ▲]

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See detailLangzeiteffekte von Klassenwiederholungen in der Sekundarstufe
Klapproth, Florian; Keller, Ulrich UL; Fischbach, Antoine UL

Scientific Conference (2020, March)

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See detailNew opportunities by laser joining of dissimilar materials
Plapper, Peter UL

Scientific Conference (2020, February 13)

The presentation gives an overview about research projects at UL related to laser welding of dissimilar materials. Literature reference at the end enables the reader to dig deeper in case some specific ... [more ▼]

The presentation gives an overview about research projects at UL related to laser welding of dissimilar materials. Literature reference at the end enables the reader to dig deeper in case some specific projects are of interest. [less ▲]

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See detailVon Imaginationen himmlischer Erlösung bis zum Pogrom – Der Umgang mit Leprakranken im historischen Überblick.
Uhrmacher, Martin UL

Scientific Conference (2020, February 13)

Die Geschichte der Lepra ist geprägt von Elend, Siechtum und Ausgrenzung bis hin zum Pogrom, aber andererseits auch von religiöser Überhöhung, Privilegierung und beispielhafter Fürsorge. Diese Ambivalenz ... [more ▼]

Die Geschichte der Lepra ist geprägt von Elend, Siechtum und Ausgrenzung bis hin zum Pogrom, aber andererseits auch von religiöser Überhöhung, Privilegierung und beispielhafter Fürsorge. Diese Ambivalenz ist sehr typisch für den Umgang mit Leprakranken, auch Leprose genannt, im Mittelalter und in der frühen Neuzeit. Und sie spiegelt sich auch in Vorurteilen wider, mit denen die an Lepra Erkrankten konfrontiert waren. Das Spektrum reicht hier von Imaginationen himmlischer Erlösung bis hin zur Unterstellung von Sünden und Verbrechen. Der Vortrag beschreibt zunächst Ursprünge und Ausprägungen von Vorurteilen gegenüber Leprakranken beschreiben. Kann man überhaupt von „den Leprosen“ sprechen, die stets als typische Randgruppe der mittelalterlichen Gesellschaft bezeichnet werden? Oder führten Vorurteile in unterschiedlichen zeitlichen und sozialen Kontexten womöglich zur Bildung verschiedener Gruppen? Hierzu werden im zweiten Teil ausgewählte Quellenbeispiele in den Blick genommen. Sie zeigen auf, welche konkreten Auswirkungen bestehende Vorurteile in der Praxis auf die Lebenswelt von Leprakranken hatten. Und sie ermöglichen, der Wandlung von Vorurteilsstrukturen in der long durée nachzugehen. [less ▲]

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See detailEarly-stage Bottleneck Identification and Removal in TSN Networks
Navet, Nicolas UL; Bengtsson, Hoai Hoang; Migge, Jörn

Scientific Conference (2020, February 12)

There has been a pivotal change in the design of E/E architectures, which is that OEM cannot assume anymore that the functions, and thus the communication requirements, are known in advance and fixed over ... [more ▼]

There has been a pivotal change in the design of E/E architectures, which is that OEM cannot assume anymore that the functions, and thus the communication requirements, are known in advance and fixed over time. It has become crucial for OEMs to be in the position to add further functions and services during the lifetime of the vehicle: OEMs need to design E/E architectures that are future-proof. We propose design space exploration algorithms, which, by answering a series of design questions and proposing solutions to the designers, help to improve an automotive E/E architecture in several dimensions: performance, costs, reliability and extensibility. We start by estimating the total "capacity" of a baseline architecture, then, by removing bottlenecks, we obtain an "enhanced capacity" architecture, which is then optimized in terms of costs and reliability. The architecture is then further optimized in terms of costs and reliability. The work is conducted on Volvo's prototype centralized and domain-based E/E architecture. [less ▲]

Detailed reference viewed: 105 (2 UL)
See detailLe relations belgo-luxembourgeoises: une mise en perspective historique
Brüll, Christoph UL

Scientific Conference (2020, February 05)

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See detailOpening the black box of the social learning process: The case of community of practices
Boughattas, Yosra; Geraudel, Mickaël UL; Claeye, Frederic

Scientific Conference (2020, February 04)

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See detailN point Virasoro algebras considered as Krichever - Novikov type algebras
Schlichenmaier, Martin UL

Scientific Conference (2020, February 04)

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See detailWOW! Sewage is valuable!
Frkova, Zuzana UL; Venditti, Silvia UL; Lacroix, Mark et al

Scientific Conference (2020, February)

There are market opportunities for raw materials from sewage, but for this the sewage treatment plants and the industry need alignment. This calls for a transition: sewage treatment plants need to switch ... [more ▼]

There are market opportunities for raw materials from sewage, but for this the sewage treatment plants and the industry need alignment. This calls for a transition: sewage treatment plants need to switch from treating sewage to producing valuable materials. On the other hand, market parties need to regard sewage as a valuable source instead of ‘dirty unsafe water’. Last but not least, the policies should better fit this new circular practice. To realize these opportunities WOW! aims to develop value chains for three different raw materials from sewage: cellulose, PHA bioplastics and lipids. [less ▲]

Detailed reference viewed: 98 (9 UL)
See detailLocal Organiser, European Shadow Financial Regulatory Committee Meeting
Wolff, Christian UL

Scientific Conference (2020, February)

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See detailThe Loneliness of the Villain : Shakespeare and Schiller
Kohns, Oliver UL

Scientific Conference (2020, February)

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See detailWhen a Master Dies: Speculation and Asset Float”
Penasse, Julien UL; Renneboog,, Luc; Scheinkman, José A.

Scientific Conference (2020, January 30)

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See detailLa pluralité des marchés du travail au Luxembourg
Pigeron-Piroth, Isabelle UL

Scientific Conference (2020, January 28)

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See detailEtudes universitaires sur le Luxembourg: Mots d'accueil
Bisdorff, Raymond UL

Scientific Conference (2020, January 28)

Concise historical review of 20 years of interdisciplinary Luxembourg studies before the foundation of the University of Luxembourg

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See detailWhy is the Market Skewness-Return Relationship Negative?
Lehnert, Thorsten UL

Scientific Conference (2020, January 23)

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See detail„Entweder man kann’s oder man lässt es bleiben.“ Kritische Gedanken zur Ausbildung von Blasmusikdirigenten
Sagrillo, Damien UL

Scientific Conference (2020, January 17)

Diesen Karl Böhm in den Mund gelegten Satz passt zu seinem Naturell. Sein Sarkasmus und Zynismus waren bekannt. Karl Böhm hat nie ein Dirigierstudium absolviert. Dennoch gehörte er zu den Großen seines ... [more ▼]

Diesen Karl Böhm in den Mund gelegten Satz passt zu seinem Naturell. Sein Sarkasmus und Zynismus waren bekannt. Karl Böhm hat nie ein Dirigierstudium absolviert. Dennoch gehörte er zu den Großen seines Fachs. In der Fachzeitschrift „das Orchester“ ist im Zusammenhang mit dem berufsausbildenden Angebot für Blasorchesterdirigenten folgendes zu lesen: „Marschmusik oder leichtere Muse haben keinen Platz im Curriculum, die Konzentration liegt auf der Literatur für Sinfonisches Blasorchester“ Diese Aussage gehört kritisch hinterfragt. In meinem Vortrag steht infolgedessen zweierlei im Vordergrund. Zum einen: Was ist ein sinfonisches Blasorchester bzw. eine Bläserphilharmonie – wo kommen die Begriffe her, worauf zielen sie ab? Zum anderen: Marchmusik und sog. „leichte Muse“ gehören zum Wesen lokaler Musikvereine. Wieso finden diese als Tradition zu bezeichnenden Genres der Blasmusik in der Ausbildung keinen Platz? In der Zusammenfassung der beiden voraus gestellten Fragen lassen sich Schlussfolgerungen für die Ausbildung von Blasmusikdirigenten ziehen. [less ▲]

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See detailFostering process related skills in mathematics though educational technology in elementary schools
Haas, Ben; Kreis, Yves UL

Scientific Conference (2020, January 17)

The Teaching in elementary school is mostly based on paper-pencil approaches and does not yet rely primary on educational technologies. But educational technology has found its way into the elementary ... [more ▼]

The Teaching in elementary school is mostly based on paper-pencil approaches and does not yet rely primary on educational technologies. But educational technology has found its way into the elementary schools, this based on various numbers of governmental initiatives launched during the last years in Luxemburg. The aims of these initiatives were to support students in mathematics and foremost render improvements on both skill settings, content and process. However using educational technology in mathematics does not jointly mean teaching and learning process skills. There are many different types of educational technology in mathematics, from tutoring systems to dynamic mathematical software and drill and practice software, only to name those as examples. We want to identify educational technologies and methodologies which are most likely to foster process skills (problem solving, modeling, argumenting, representing and communicating) in mathematics. Therefore we would work on a set of educational technologies offered to the students in elementary school in Luxemburg and evaluate their impacts on the fostering of process skills in mathematics. [less ▲]

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See detailStudents’ perceptions of instructional quality: Validating 3 dimensions on a lesson-to-lesson basis
Talic, Irma UL; Möller, Jens; Niepel, Christoph UL

Scientific Conference (2020, January 17)

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See detailPlacebo Analgesie im Alter
Dierolf, Angelika UL; Rischer, Katharina Miriam UL; van der Meulen, Marian UL

Scientific Conference (2020, January)

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See detailControl Strategy for Long-Term Station-keeping on Near-Rectilinear Halo Orbits
Muralidharan, Vivek UL; Weiss, Avishai; Kalabic, Uros

Scientific Conference (2020, January)

This work considers the control of a spacecraft in indefinite near-rectilinear halo orbit about the Earth-Moon L2. For indefinite station-keeping, it is important to minimize fuel consumption, while ... [more ▼]

This work considers the control of a spacecraft in indefinite near-rectilinear halo orbit about the Earth-Moon L2. For indefinite station-keeping, it is important to minimize fuel consumption, while allowing for occasional transfer to a new orbit. The control scheme therefore consists of two components: the first component is the tracking of the nominal NRHO and the second component is an orbit correction maneuver between NRHO trajectories. The nominal NRHO is computed using a multiple-shooting technique that takes into account all forces on the spacecraft whose magnitude is larger than the dominant disturbance forces caused by navigational error. The tracking component is a linear-quadratic regulation scheme that rejects disturbances caused by orbit determination error, using a Lyapunov sublevel set that models the state covariance generated using sequential Kalman filter. The orbit correction maneuver is computed to minimize fuel costs. [less ▲]

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See detailWhen a Master Dies: Speculation and Asset Float
Penasse, Julien UL; Renneboog, L; Scheinkman, J

Scientific Conference (2020, January)

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See detailConditionality in the European Union External Migration Policy – A Critical Appraisal
Silga, Janine UL

Scientific Conference (2020, January)

Detailed reference viewed: 66 (5 UL)
See detailAmbitious Amateurs - European Filmclubs in the long 1960s
Wack, Julia UL

Scientific Conference (2020, January)

Ambitious Amateurs aims to investigate the so-called mass taste through the lens of the participatory cultural practice of filming in the long 1960s. The filmmakers were consumers of a medium they were co ... [more ▼]

Ambitious Amateurs aims to investigate the so-called mass taste through the lens of the participatory cultural practice of filming in the long 1960s. The filmmakers were consumers of a medium they were co-creating themselves. They were producing for a circle of peers, respectively to get recognition from professionals. The aesthetic form of these films and genres, the excess of meaning, as well as the moral political ideals represent central axes of the analysis. Additionally, relations between the club members and their activities in national umbrella associations as well as contexts of transnational encounters (i.e. UNICA, founded in 1937) shall be further observed. This will be executed on the examples of selected clubs and locations in Luxembourg, Belgium, France and Germany. Besides archive research and Oral History, the film documents themselves are the core piece of the analysis. The topic is of particular relevance for general Culture and Media History, due to the historical evolution of censorship and auto-censorship tendencies regarding sexual permissiveness, political militancy or religious statements in the long 1960s. These will be connected with the issue of Americanisation, respectively the rejection of the latter within the discourse of European film creators and the topical press. The international comparison will additionally facilitate the display of national specificities and diverse temporalities within (Western)Europe. Simultaneously a possibility to conceive certain potential transnational developments – also beyond the ‘Iron Curtain’ – will be generated. [less ▲]

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See detailImpact of Atmospheric Circulation on Flooding Occurrence and Type in Luxembourg (Central Western Europe)
Meyer, Judith; Douinot, Audrey; Zehe, Erwin et al

Scientific Conference (2020)

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See detailSpace-Time Triplet Loss Network for Dynamic 3D Face Verification
Kacem, Anis UL; Ben Abdessalem, Hamza UL; Cherenkova, Kseniya UL et al

Scientific Conference (2020)

In this paper, we propose a new approach for 3D dynamic face verification exploiting 3D facial deformations. First, 3D faces are encoded into low-dimensional representations describing the local ... [more ▼]

In this paper, we propose a new approach for 3D dynamic face verification exploiting 3D facial deformations. First, 3D faces are encoded into low-dimensional representations describing the local deformations of the faces with respect to a mean face. Second, the encoded versions of the 3D faces along a sequence are stacked into 2D arrays for temporal modeling. The resulting 2D arrays are then fed to a triplet loss network for dynamic sequence embedding. Finally, the outputs of the triplet loss network are compared using cosine similarity measure for face verification. By projecting the feature maps of the triplet loss network into attention maps on the 3D face sequences, we are able to detect the space-time patterns that contribute most to the pairwise similarity between differ-ent 3D facial expressions of the same person. The evaluation is conducted on the publicly available BU4D dataset which contains dynamic 3D face sequences. Obtained results are promising with respect to baseline methods. [less ▲]

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See detailLong-term monitoring with spring-based gravimeters: tilt-control benefits and application to the Rochefort Cave Laboratory (Belgium)
Fores, Benjamin; Watlet, Arnaud; Van Camp, Michel et al

Scientific Conference (2020)

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See detailThe patients’ perspective on access to and use of Personal Health Records
Paccoud, Ivana UL; Baumann, Michèle UL; Le Bihan, Etienne UL et al

Scientific Conference (2020)

We present the patients' perspective regarding the use of Personal Health Records, and give insights on patients' characteristics, such as socioeconomic and behavioural factors, that are associated with ... [more ▼]

We present the patients' perspective regarding the use of Personal Health Records, and give insights on patients' characteristics, such as socioeconomic and behavioural factors, that are associated with the access to and use of Personal Health Records. The findings come from the INTERREG APPS project that investigated preferences for and intention to use Personal Health Records in four cross-border regions, in Lorraine/France, Luxembourg, Rhineland-Palatinate and Saarland/Germany, and Wallonia/Belgium. [less ▲]

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See detailWhen Machiavelli meets social Work: cross-border child protection and disability rights - shifting from marketisation of social care to post neoliberalism and re-conquest of public responsibility.
Limbach-Reich, Arthur UL; Schulze-Kruedener, Joergen

Scientific Conference (2020)

Against the background of neoliberal and globally organized social work, the presentation discusses the very first results of the international research project on cross-border child protection and ... [more ▼]

Against the background of neoliberal and globally organized social work, the presentation discusses the very first results of the international research project on cross-border child protection and disability rights in transnational settings (EUR&QUA). According to international Conventions (UNCRC, 1990; UNCRPD, 2006), States parties shall ensure the full realization of all human rights and fundamental freedoms for all children. Such imperatives seem to contradict neoliberal social policy, which is primarily oriented towards marketisation, austerity, and individualisation of social problems (Cummins, 2018). Actually, our research suggests that crossing borders often means breaking off helping relations and absence of professional exchange between care providers. A return to the original life context desired by the clients seems unfeasible. Therefore, we plead for social workers to acquire global, and cross-border competences in this field. Social work needs Machiavellian competences (Kusiak, 2018), which consist of critically illuminating a dominant ideology, conducting research, and acquiring strategic knowledge. [less ▲]

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See detailMobile friendly design in web survey: Increasing user convenience or additional error sources?
Décieux, Jean Philippe; Sischka, Philipp UL

Scientific Conference (2020)

Relevance: At the beginning of the era of online surveys, these were programmed to be answered using desktop PCs or notebooks. However, due to technical development such as the increasing role of mobile ... [more ▼]

Relevance: At the beginning of the era of online surveys, these were programmed to be answered using desktop PCs or notebooks. However, due to technical development such as the increasing role of mobile devices, studies on online survey research detect an increase of questionnaires that are answered on mobile devices (md). However, survey navigation on md is different compared to PC: it takes place on a smaller screen and usually involves a touch pad rather than a mouse and a keyboard. Due to these differences in questionnaire navigation, some of the traditional used web question formats are no longer convenient to be answered on a md. The most common formats are matrix questions. To deal with this development, so called mobile-friendly or responsive-designs were developed, which change the layout of specific questions that are not convenient on a md into an alternative mobile-friendly-design. In case of matrixes, these were separated into item-by-item questions which are suggested to be more comfortable to answer on a mobile device. Research question: However, from a psychometric perspective the question whether these changes in question format produce comparable results is too often ignored. Therefore, this paper elucidates the following research question: Do different versions of responsive-designs actually produce equivalent response? Data & Methods: Using the data of the first two waves of the Germ and Emigration and Remigration Panelstudy we can base our analysis on more than 19.000 cases (appox. 7.000 using different md). As GERPS makes use of a responsive design, we are able to investigate measurement invariance between different md and desktop device groups. Results: As the data management is still in progress and will be finished in the end of October, we will be able to present first-hand information based on fresh data. However, first initial analyses reveal differences between md and desktop device versions. Added Value: Our study is one of the first that elucidates the equivalence of responsive design options. Thus, it enhances the perspective on the existence of possible new biases and error sources due to the increased use of md within web surveys. [less ▲]

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See detailA Cooperative Approach to Modeling Talent Development in STEM Fields in Elementary School
Breit, Moritz; Krischler, Mireille UL; Preckel, Franzis

Scientific Conference (2020)

We present two domain-specific talent development models for mathematics and natural science in elementary school. The models were formulated based on the joined expertise of giftedness researchers and ... [more ▼]

We present two domain-specific talent development models for mathematics and natural science in elementary school. The models were formulated based on the joined expertise of giftedness researchers and teachers. An extensive search of the scientific literature, as well as several teacher workshops in the context of a nation-wide German teacher training program were conducted. The results show that teachers and scientists share a multidimensional, dynamic view on talent development. The cognitive abilities, personality traits and psychosocial skills related to talent development in mathematics and science are presented. The resulting models can be used as a starting point for the construction of diagnostic material, the training of diagnostic abilities in teachers, and for the promotion of gifted children. [less ▲]

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See detailPartnership transitions and cognitive functioning among the European 50+
Bertogg, Ariane; Leist, Anja UL

Scientific Conference (2020)

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See detailA cross-geographical conversation on (post) communism, social democracy, anarchism – and diverse economies
North, Peter; Cima, Ottavia UL; Hull, Richard et al

Scientific Conference (2020)

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See detailMeasuring gravity changes for decades
Van Camp, Michel; de Viron, Olivier; Meurers, Bruno et al

Scientific Conference (2020)

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See detailProceedings of the AI4Health Lecture Series (2020)
Schommer, Christoph UL; Sauter, Thomas UL; Pang, Jun UL et al

Scientific Conference (2020)

The research field between Artificial Intelligence and Health sciences has established itself as a central research direction in recent years and has also further increased social interest. On the one ... [more ▼]

The research field between Artificial Intelligence and Health sciences has established itself as a central research direction in recent years and has also further increased social interest. On the one hand, this is due to the emergence of medical mass data and their use for AI-related fields, such as machine learning, human-computer interfaces and natural language-processing systems, and on the other hand, it is also due to the steadily growing social interest, which is not determined by the current Covid 19 pandemic. To this end, the lecture series is intended to provide an opportunity for scientific exchange. [less ▲]

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See detailUsing environmental predictive settlement choice models as input data for settlement pattern simulations
Sikk, Kaarel UL

Scientific Conference (2020)

Inductive models of archaeological site locations have been successfully used for predicting archaeological potential of places in landscapes. These models are mostly based on currently observable ... [more ▼]

Inductive models of archaeological site locations have been successfully used for predicting archaeological potential of places in landscapes. These models are mostly based on currently observable environmental information. To reduce environmental determinism and increase both explanatory and predictive power several variables like visibility of locations have been interpreted as social factors of settlement locations. In the current paper we explore the possibilities of using inductive environmental models as input to simulation models. Although similar to models created for predictive purposes they need to be designed with different considerations. We present a study where we use inductive models of archaeological site locations to describe the spatial configuration of space environmentally suitable for residence. To do so we develop a conceptual agent-based model of residential choice based on discrete choice theory and theories of residential choice used in multiple fields from archaeology to contemporary urban studies. We discuss the role of environmental influences as perceived in archaeological data and how they relate to social influences and historical processes leading to emergence of settlement patterns. We argue that spatial structures of the inductive models of specific settlement patterns can inform us about the causal processes behind them when experimented with agent-based simulations. We present case study using inductive models of settlement locations from different periods of the Stone Age of Estonia. The differences of inductive settlement choice models and the ways of comparing them are discussed. The spatial configurations of the models of economic modes have different structures. For example region where settlements of water connected hunter-gatherers can be found has a different spatial structure than that of early agrarian communities. Those differences give insights on socioeconomic histories and can be used in explaining settlement pattern formation processes. [less ▲]

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See detailUnderstanding Walking Meetings: Drivers and Barriers
Damen, Ida; Lallemand, Carine UL; Brankaert, Rens et al

Scientific Conference (2020)

There is increased interest in reducing sedentary behavior of office workers to combat the negative health effects of prolonged sitting. Walking meetings offer a promising solution to this problem as they ... [more ▼]

There is increased interest in reducing sedentary behavior of office workers to combat the negative health effects of prolonged sitting. Walking meetings offer a promising solution to this problem as they facilitate a physically active way of working. To inform future development of technologies supporting these type of meetings, in-depth qualitative insights into people’s experiences of walking meetings are needed. We conducted semi-structured walking interviews (N=16) to identify key drivers and barriers for walking meetings in a living lab setting by using the ‘WorkWalk’. The ‘WorkWalk’ is a 1.8 km walking route indicated by a dotted blue line with outdoor meeting points, integrated into the room booking system. Our findings provide insights into how walking meetings are experienced and affect the set-up and social dynamics of meetings. We propose design recommendations for the development of future technologies and service design elements to support walking meetings and active ways of working. [less ▲]

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See detailMeasures of Executive Functions and Mathematical Skills are Distinct Even at a Young Age: A Meta-Analysis with Preschool Children
Emslander, Valentin UL; Scherer, Ronny

Scientific Conference (2020)

Measures of executive functions (inhibition, attention shifting, working memory) are linked to measures of mathematical skills in school students and adults. However, the magnitude of this relation in ... [more ▼]

Measures of executive functions (inhibition, attention shifting, working memory) are linked to measures of mathematical skills in school students and adults. However, the magnitude of this relation in preschool children is unclear. Following the literature on the differentiation of cognitive skills over time, some researchers suggest that tests of executive functions and mathematical skills measure the same underlying construct, while others suggest that they measure correlated but distinct constructs. This dispute does not only tap the question of how the constructs can be understood but also the question of cost and test efficiency (i.e., assessments of single vs. multiple constructs). Clarifying the relation between measures of the two constructs can be especially challenging because preschoolers cannot fill in commonly used questionnaires that require them to read. Thus, researchers have to resort to behavioral, verbal, apparatus-, or computer-based assessments of executive functions. As a result, executive functions may vary in their relation to mathematical skills as a consequence of their measurement. We examined the link between executive functions and early mathematical skills measures, conducting a meta-analysis of 26 studies containing 238 effect sizes for a total sample of 24,256 preschool children. Specifically, we synthesized the corresponding correlations and aimed to clarify which executive function assessments were used for preschool children and how assessment characteristics may moderate the correlation between executive functions and mathematical skills. Three-level random-effects meta-analysis revealed a small to moderate average correlation between executive functions and mathematical skills measures of preschool children, r = 0.35. The type of assessment (behavioral, verbal, apparatus-, or computer-based assessments) did not moderate this relation. Investigating the three executive functions separately, we found average correlations of r = 0.31 between mathematical skills and inhibition, r = 0.38 between mathematical skills and attention shifting, and r = 0.36 between mathematical skills and updating. These analyses will be supplemented by further moderator and sensitivity analyses. These findings emphasize the significant link between executive functions and mathematical skills measures in preschoolers—hereby, supporting that the measures of both constructs are distinct. In addition, under-researched areas around the assessment of executive functions and mathematical abilities will be discussed. [less ▲]

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See detailA Q-Learning Hyper-Heuristic for UAV Swarming
Duflo, Gabriel UL; Danoy, Grégoire UL; Talbi, El-Ghazali UL et al

Scientific Conference (2020)

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See detailMeeting Designers Where They Are: Using Industry Events as a Research Venue for HCI and Design Methods Development
Lockton, Dan; Lallemand, Carine UL

Scientific Conference (2020)

There is much work in the CHI community about the ‘industry-academia divide’, and how to bridge it. One key crossover between HCI/UX scientists and practitioners is the development and use of tools and ... [more ▼]

There is much work in the CHI community about the ‘industry-academia divide’, and how to bridge it. One key crossover between HCI/UX scientists and practitioners is the development and use of tools and methods—boundary objects between academia and practice. Among other forms of collaboration, there is an underdeveloped opportunity for academics to make use of industry events (conferences, meetups, design jams) as a research venue in the context of tool and method development. This paper describes three cases from work in academia-industry engagement over the last decade, in which workshops or experiments have been run at industry events as a way of trialling and developing tools directly with practitioners. We discuss advantages of this approach and extract key insights and practical implications, highlighting how the CHI community might use this method more widely, gathering relevant research outcomes while contributing to knowledge exchange between academia and practice. [less ▲]

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See detailAdversarial Embedding: A robust and elusive Steganography and Watermarking technique
Ghamizi, Salah UL; Cordy, Maxime UL; Papadakis, Mike UL et al

Scientific Conference (2020)

We propose adversarial embedding, a new steganography and watermarking technique that embeds secret information within images. The key idea of our method is to use deep neural networks for image ... [more ▼]

We propose adversarial embedding, a new steganography and watermarking technique that embeds secret information within images. The key idea of our method is to use deep neural networks for image classification and adversarial attacks to embed secret information within images. Thus, we use the attacks to embed an encoding of the message within images and the related deep neural network outputs to extract it. The key properties of adversarial attacks (invisible perturbations, nontransferability, resilience to tampering) offer guarantees regarding the confidentiality and the integrity of the hidden messages. We empirically evaluate adversarial embedding using more than 100 models and 1,000 messages. Our results confirm that our embedding passes unnoticed by both humans and steganalysis methods, while at the same time impedes illicit retrieval of the message (less than 13% recovery rate when the interceptor has some knowledge about our model), and is resilient to soft and (to some extent) aggressive image tampering (up to 100% recovery rate under jpeg compression). We further develop our method by proposing a new type of adversarial attack which improves the embedding density (amount of hidden information) of our method to up to 10 bits per pixel. [less ▲]

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