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

Scientific Conference (in press)

Detailed reference viewed: 123 (11 UL)
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See detailBuffer XDEM
Mainassara Chekaraou, Abdoul Wahid UL; Besseron, Xavier UL; Rousset, Alban UL et al

Scientific Conference (in press)

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See detailSmall in size, great in significance: conspicilla and perspicilla in the visual arts of the Low Countries around 1600
Koeleman, Floor UL

Scientific Conference (2021, July)

A largely forgotten constcamer painting from the early seventeenth century shows eyeglasses and a telescope in close proximity. The inclusion of these extensions of sight in The Five Senses of the Musée ... [more ▼]

A largely forgotten constcamer painting from the early seventeenth century shows eyeglasses and a telescope in close proximity. The inclusion of these extensions of sight in The Five Senses of the Musée Magnin (Dijon) seems to allude to the implicit link between the two. As tools to observe with and through, these instruments visualize the limits of human perception and the ability to alter the scale of the visible world. The Five Senses was created in Antwerp around the same time the telescope first appeared in textual sources, namely 1608. However, the optical instrument is likely to have existed for years by then. This paper investigates if any references to the telescope in the visual arts predate the first written evidence of its invention. For artists the early telescope was probably not that challenging an object to represent. The exterior, a simple tube characterized by a diaphragm, housed two lenses made by the same glass industry that manufactured eyeglasses. This paper takes a closer look at the imagery of eyeglasses and telescopes, depicted in the visual arts of the late sixteenth and early seventeenth centuries. The meaning assigned to these instruments can be inferred from the context in which they are presented and their relative scale. Together eyeglasses and telescopes feature prominently in constcamer paintings dedicated to visual perception, understood both physically and metaphysically. While the exact date of creation remains subject to debate, The Five Senses probably contains the earliest known depiction of a telescope – true to scale. [less ▲]

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See detailTackling educational inequalities using school effectiveness measures
Levy, Jessica UL; Mussack, Dominic UL; Brunner, Martin et al

Scientific Conference (2020, November 11)

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See detailOn the Random Access Procedure of NB-IoT Non-Terrestrial Networks
Kodheli, Oltjon UL; Maturo, Nicola UL; Chatzinotas, Symeon UL et al

Scientific Conference (2020, October 20)

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See detailPVDeConv: Point-Voxel Deconvolution for Autoencoding CAD Construction in 3D
Cherenkova, Kseniya UL; Aouada, Djamila UL; Gusev, Gleb

Scientific Conference (2020, October)

We propose a Point-Voxel DeConvolution (PVDeConv) mod- ule for 3D data autoencoder. To demonstrate its efficiency we learn to synthesize high-resolution point clouds of 10k points that densely describe ... [more ▼]

We propose a Point-Voxel DeConvolution (PVDeConv) mod- ule for 3D data autoencoder. To demonstrate its efficiency we learn to synthesize high-resolution point clouds of 10k points that densely describe the underlying geometry of Computer Aided Design (CAD) models. Scanning artifacts, such as pro- trusions, missing parts, smoothed edges and holes, inevitably appear in real 3D scans of fabricated CAD objects. Learning the original CAD model construction from a 3D scan requires a ground truth to be available together with the corresponding 3D scan of an object. To solve the gap, we introduce a new dedicated dataset, the CC3D, containing 50k+ pairs of CAD models and their corresponding 3D meshes. This dataset is used to learn a convolutional autoencoder for point clouds sampled from the pairs of 3D scans - CAD models. The chal- lenges of this new dataset are demonstrated in comparison with other generative point cloud sampling models trained on ShapeNet. The CC3D autoencoder is efficient with respect to memory consumption and training time as compared to state- of-the-art models for 3D data generation. [less ▲]

Detailed reference viewed: 97 (3 UL)
See detailScientific Instruments in Constcamer Paintings: Pictorial Space as a Context for Interpretation
Koeleman, Floor UL

Scientific Conference (2020, September)

Representations of scientific instruments abound in the seventeenth-century genre of constcamer paintings. These works of art depict interiors full of rich collections of artifacts, natural materials ... [more ▼]

Representations of scientific instruments abound in the seventeenth-century genre of constcamer paintings. These works of art depict interiors full of rich collections of artifacts, natural materials, animals and people, and were created almost exclusively in Antwerp and Brussels. In contrast to material and written sources, such images provide us with a context, captured in paint, which contributes to our understanding of the contemporary meaning of scientific instruments. This presentation will highlight the wide variety of instruments (mainly optical and mathematical) that are included in constcamer paintings. Depending on how we define ‘scientific instrument’, between 63 and 100 constcamer paintings from the early modern period can be identified as including representations of scientific instruments. The study of these images from the perspective of the visual and material culture of science not only provides further insight into the variety of instruments that existed at the time, but also sheds light on how painters produced these representations, either by using an actual object or by resorting to a preexisting depiction. It will be shown that the instruments in the paintings reflect a thriving glass industry and the activity of skilled goldsmiths in local workshops and at the archducal court. While over the course of the seventeenth century the novelty of such instruments declined, their association with knowledge of nature, the role of vision and the art of painting persisted. As such, the instruments in constcamer paintings denote both a practical and a philosophical dimension, relating to the world of the senses as well as the intellect. [less ▲]

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See detailDecomposition schemes for symmetric n-ary bands
Devillet, Jimmy UL; Mathonet, Pierre

Scientific Conference (2020, August 27)

We extend the classical (strong) semilattice decomposition scheme of certain classes of semigroups to the class of idempotent symmetric n-ary semigroups (i.e. symmetric n-ary bands) where n \geq 2 is an ... [more ▼]

We extend the classical (strong) semilattice decomposition scheme of certain classes of semigroups to the class of idempotent symmetric n-ary semigroups (i.e. symmetric n-ary bands) where n \geq 2 is an integer. More precisely, we show that these semigroups are exactly the strong n-ary semilattices of n-ary extensions of Abelian groups whose exponents divide n-1. We then use this main result to obtain necessary and sufficient conditions for a symmetric n-ary band to be reducible to a semigroup. [less ▲]

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See detailCollective Knowledge Production in Educational Ethnography: From Team-Ethnography to European Cooperation and Beyond
Maeder, Christoph; Kuhn, Melanie; Neumann, Sascha et al

Scientific Conference (2020, August)

Ethnography can be regarded as being inherently collaborative (see: Lassiter 2005). But if we accept ethnography as a collaborative, cooperative and joint production of knowledge, many questions namely ... [more ▼]

Ethnography can be regarded as being inherently collaborative (see: Lassiter 2005). But if we accept ethnography as a collaborative, cooperative and joint production of knowledge, many questions namely around cooperation within and between people, projects, disciplines, places, organizations and research teams etc. arise. In this panel discussion we want to explore and discuss questions and challenges of different levels of collaboration, or ways of working together in educational ethnography under the auspices of the production of knowledge on education. [...] [less ▲]

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See detailManaging residence permits and migrant unemployment during the COVID-19 crisis
Sommarribas, Adolfo UL

Scientific Conference (2020, July 30)

This presentation deals on how immigration authorities in European Union Member States and Norway dealt with third-country national residence permits and how they are dealing with third-country nationals ... [more ▼]

This presentation deals on how immigration authorities in European Union Member States and Norway dealt with third-country national residence permits and how they are dealing with third-country nationals who are losing their employment in regard to their right to stay in the host countries. [less ▲]

Detailed reference viewed: 59 (0 UL)
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See detailWorking with Deep Generative Models and Tabular Data Imputation
Camino, Ramiro Daniel UL; Hammerschmidt, Christian UL; State, Radu UL

Scientific Conference (2020, July 17)

Datasets with missing values are very common in industry applications. Missing data typically have a negative impact on machine learning models. With the rise of generative models in deep learning, recent ... [more ▼]

Datasets with missing values are very common in industry applications. Missing data typically have a negative impact on machine learning models. With the rise of generative models in deep learning, recent studies proposed solutions to the problem of imputing missing values based various deep generative models. Previous experiments with Generative Adversarial Networks (GANs) and Variational Autoencoders (VAEs) showed promising results in this domain. Initially, these results focused on imputation in image data, e.g. filling missing patches in images. Recent proposals addressed missing values in tabular data. For these data, the case for deep generative models seems to be less clear. In the process of providing a fair comparison of proposed methods, we uncover several issues when assessing the status quo: the use of under-specified and ambiguous dataset names, the large range of parameters and hyper-parameters to tune for each method, and the use of different metrics and evaluation methods. [less ▲]

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See detailSTEAM Education in elementary schools: A holistic investigation on technology enhanced teaching and learning
Haas, Ben; Lavicza, Zsolt; Kreis, Yves UL

Scientific Conference (2020, July 03)

When we address the learning of mathematics in elementary school, we imagine pupils doing experiments, discoveries, and combining the different elements from arithmetics to geometry. Pupils interact with ... [more ▼]

When we address the learning of mathematics in elementary school, we imagine pupils doing experiments, discoveries, and combining the different elements from arithmetics to geometry. Pupils interact with their environment and try to use their learned skills to get a deeper understanding of the world. They engage in a mathematical thinking process and try to interact with their environment. However, when you visit a classroom, you find a rather old fashioned teaching based on a deductive approach where imitations of technics play an essential role. Based on our observations, pupils learn mainly through to repetitions in textbooks. Experimentation, if any, comes as additional work, it is seen as a ludic activity rather than as real learning activity. In our research, we inquired about different ways to engage pupils in an experimental approach. We used digital and physical modulation, augmented reality, and various educational technologies. In one of our first studies, we designed a tutoring system to foster process-related skills in mathematics within the educational software MathemaTIC . We collected data on pupils in assessments on transferring mathematical thinking from instructional technology to the everyday classroom teaching. In a second study, we worked with pupils from elementary schools, kindergarten, and from the special needs section to go beyond two-dimensional representations and discover how mathematics operates in three-dimensional settings. Pupils worked on designing software and three-dimensional printing. We collected data on how pupils and parents perceived the learning and teaching and how this influences the further thinking in mathematics. In a holistic approach, we aimed to identify how pupils, teachers and parents perceive the learning through these new technologies and how it affects the learning and teaching. Our research happened in onsite and remote teaching. In this conference, we will present results from the different studies, give insights into our research, and present future experimental investigations. [less ▲]

Detailed reference viewed: 146 (2 UL)
See detailEthische Aspekte im reflexiven Schulpraktikum. Eine Ethik des Lebens für Praxisbegleiter
Weber, Jean-Marie UL

Scientific Conference (2020, July 03)

Detailed reference viewed: 31 (2 UL)
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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 detailNational responses to date during the COVID-19 crisis in the areas of migration and asylum
Sommarribas, Adolfo UL

Scientific Conference (2020, July 02)

This is a presentation of key findings of national responses to COVID-19 to date based on EMN Ad-hoc Queries launched by the European Migration Network between 13 March and 15 June 2020.

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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 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 ▲]

Detailed reference viewed: 28 (1 UL)
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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: 48 (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 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 detailDATA DRIVEN SURGICAL SIMULATIONS
Deshpande, Saurabh UL; Bordas, Stéphane UL; Beex, Lars UL et al

Scientific Conference (2020, July)

Detailed reference viewed: 24 (4 UL)
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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 ▲]

Detailed reference viewed: 145 (5 UL)
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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 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)

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

Detailed reference viewed: 54 (0 UL)
See detailThe Loneliness of the Vilain : Shakespeare and Schiller
Kohns, Oliver UL

Scientific Conference (2020, February)

Detailed reference viewed: 20 (1 UL)
See detailLocal Organiser, European Shadow Financial Regulatory Committee Meeting
Wolff, Christian 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)

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we ... [more ▼]

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we consider the usual interpretation of e.g. option-implied skewness as an indicator of jump risk or downside risk. One possible explanation for this inconsistency is that there are factors affecting option-implied market skewness other than jump risk in the stock market. In this paper, I find that price pressure associated with “crowded trades” of mutual funds is an important endogenous factor. Given that retail investors are prone to herding, the directional trading of mutual funds is correlated, and their collective actions can generate short-term price pressure on aggregate stock prices. Short sellers systematically exploit these patterns not only in the equity lending market, but also in the options market. In line with this economic channel, I find that firstly, the significant negative relationship between market skewness and returns becomes insignificant, once I control for price pressure. Secondly, the negative relationship is only present for the “bad” downside component of risk-neutral skewness, associated with out-of-the-money put options. For the “good” upside component of risk-neutral skewness, associated with out-of-the-money call options, the relationship is always positive. Thirdly, price pressure affects the skewness-return relationship, which can be clearly distinguished from the impact of flows on the volatility-return relationship in terms of the leverage effect. [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 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 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)

Detailed reference viewed: 16 (1 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 detailConditionality in the European Union External Migration Policy – A Critical Appraisal
Silga, Janine UL

Scientific Conference (2020, January)

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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 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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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 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 detailA performance evaluation of weight-constrained conditioned portfolio optimization
Schiltz, Jang UL; Boissaux, Marc UL

Scientific Conference (2019, December 20)

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See detailFrom home to early childhood education: beliefs, language ideologies and OPOL
Kirsch, Claudine UL

Scientific Conference (2019, December 18)

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See detailHome literacy environment and family language policy of immigrant families in Luxembourg
Aleksic, Gabrijela UL; Bebic, Dzoen Dominique UL

Scientific Conference (2019, December 18)

Early literacy skills are critical for children’s later academic achievement. A wealth of research showed that children’s home languages should not be abandoned, as they are crucial for promoting dynamic ... [more ▼]

Early literacy skills are critical for children’s later academic achievement. A wealth of research showed that children’s home languages should not be abandoned, as they are crucial for promoting dynamic multilingualism, assuring cross-linguistic transfer and developing identities. To explore home literacy environment and family language policy of language minority preschool children in Luxembourg, we obtained 603 parent questionnaires, tested 226 children age 4 to 6 in their home languages and Luxembourgish, and interviewed 31 families. The results from the questionnaires showed that the home resources and parent involvement influenced children’s language awareness and their print knowledge irrespective of parent’s education and their wealth. Concerning children’s competences in Luxembourgish, children with positive attitudes towards their school did better than their peers in other schools. In the interviews, parents explained that maintaining home language is important for keeping connections with family, friends and their culture. This is the language parents feel emotionally connected to and the easiest to transmit to their children. Language maintenance is mostly achieved through conversations, movies, games and books in the home languages, children’s attendance of language schools on weekends, celebrations of traditions as well as holidays in the native country of the parents. The home language is, however, not something parents enforce too strictly, as they mostly correct the children’s linguistic mistakes by simple repetition. It is often with great pride that parents report their children having an excellent proficiency in their home language. Finally, through our professional development training in translanguaging we are helping teachers to integrate children’s different home languages and cultures into the classroom and strengthen the home-school collaboration in order to support children’s well-being, learning and identities. [less ▲]

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See detailYoung emergent multilingual children's agency in learning new language in trilingual Luxembourg
Mortini, Simone UL

Scientific Conference (2019, December 14)

Studies on translanguaging suggest that opportunities to use languages flexibly in the classroom may give children some agency over their language use and facilitate their language learning (García ... [more ▼]

Studies on translanguaging suggest that opportunities to use languages flexibly in the classroom may give children some agency over their language use and facilitate their language learning (García & Kleifgen, 2010). In the emerging field of preschool bilingual education, scholars investigate the concept of child agency in relation to the learning of multiple languages (Schwartz, 2018). Children were shown to actively and creatively contribute to their language learning through choosing to interact in a particular language. Studies on young children’s translanguaging and agency nevertheless remain scarce, especially in multilingual contexts involving more than two languages (Schwartz et al., forthcoming). The present study focuses on eight children’s agentive behaviour in multilingual practices in two formal and two non-formal early childhood education institutions participating in a larger longitudinal research project on the development of multilingual pedagogies in trilingual Luxembourg. I drew on multidimensional qualitative research methods, including 65 days of participant observations, fieldnotes, video-recordings and semi-structured interviews with the practitioners. The findings show that all the children made use of various non-linguistic strategies and at least four named languages and translanguaged for various purposes (e.g. demonstrating knowledge, meaning making). Moreover, they showed two types of agentive behaviour: ‘participatory agency’ (e.g. adapting learning to practitioners’ requirements) and ‘controlling agency’ (e.g. influencing or changing peers’ or practitioners’ language use). The findings should deepen our understanding of the interplay between agency and translanguaging. García, O., & Kleifgen, J. (2010). Educating Emergent Bilinguals. Policies, Programs and Practices for English Language Learners. New York: Teachers College Press. Schwartz, M. (2018). Preschool Bilingual Education: Agency in Interactions between Children, Teachers, and Parents. Dordrecht: Springer. Schwartz, M., Kirsch, C., & Mortini, S. (forthcoming). Young children’s language-based agency in multilingual contexts in Luxembourg and Israel. (Applied Linguistic Review). Manuscript accepted for publication. [less ▲]

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See detailA professional development course in translanguaging: Teachers’ stance, design, and shifts
Aleksic, Gabrijela UL

Scientific Conference (2019, December 14)

The school population in Luxembourg is highly socially, culturally, and linguistically diverse. The new law in 2017 has declared multilingual early education mandatory, with the focus not only on the ... [more ▼]

The school population in Luxembourg is highly socially, culturally, and linguistically diverse. The new law in 2017 has declared multilingual early education mandatory, with the focus not only on the development of Luxemburgish, but also familiarizing children with French and valuing their home languages. Thus, our project aims to: (1) offer a professional development (PD) course in translanguaging to preschool teachers, (2) involve children’s families to reinforce home-school collaboration, and (3) foster children’s cognitive, linguistic, and socio-emotional engagement in the classroom. With teachers, we use focus groups, questionnaires, and language portraits, with parents, we employ questionnaires and interviews, and with children, a test in early literacy and numeracy in school and home language and video observations. Translanguaging is the use of a full linguistic repertoire to make meaning (Otheguy, García, & Reid, 2015). Translanguaging pedagogy is the main topic of our 22 hour PD course (June – December 2019) for 40 teachers. In the focus groups, the teachers shared their negative translanguaging stance towards the use of children’s home languages in the classroom, convinced that it hindered the development of Luxembourgish. Teachers, however, in some instances incorporated a translanguaging design (e.g. multilingual stories, morning greetings) and translanguaging shift (e.g. translations by older children). The project addresses these negative translanguaging stances through practical activities and a close collaboration with parents, children and organisational stakeholders. The preliminary results from parent questionnaires and tests with children will provide a bigger picture of the effect of translanguaging pedagogy from our PD course on all the actors involved. References Otheguy, R., García, O., & Reid, W. (2015). Clarifying translanguaging and deconstructing named languages: A perspective from linguistics. Applied Linguistic Review, 6(3), 281–307. [less ▲]

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

Scientific Conference (2019, December 13)

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we ... [more ▼]

The observed negative relationship between market skewness and excess return or the negative price of market skewness risk in the cross-section of stock returns is somewhat counterintuitive when we consider the usual interpretation of e.g. option-implied skewness as an indicator of jump risk or downside risk. One possible explanation for this inconsistency is that there are factors affecting option-implied market skewness other than jump risk in the stock market. In this paper, I find that price pressure associated with “crowded trades” of mutual funds is an important endogenous factor. Given that retail investors are prone to herding, the directional trading of mutual funds is correlated, and their collective actions can generate short-term price pressure on aggregate stock prices. Short sellers systematically exploit these patterns not only in the equity lending market, but also in the options market. In line with this economic channel, I find that firstly, the significant negative relationship between market skewness and returns becomes insignificant, once I control for price pressure. Secondly, the negative relationship is only present for the “bad” downside component of risk-neutral skewness, associated with out-of-the-money put options. For the “good” upside component of risk-neutral skewness, associated with out-of-the-money call options, the relationship is always positive. Thirdly, price pressure affects the skewness-return relationship, which can be clearly distinguished from the impact of flows on the volatility-return relationship in terms of the leverage effect. [less ▲]

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See detailUsing the Vertical Land Movement estimates from the IGS TIGA combined solution to derive Global Mean Sea Level changes
Bogusz, Janusz; Hunegnaw, Addisu UL; Teferle, Felix Norman UL et al

Scientific Conference (2019, December 13)

Global mean sea level (GMSL) is now widely recognized to have risen between 1 to 2 mm/yr depending on location since the 20th century. Prior to the satellite altimetry era, GMSL was primarily estimated ... [more ▼]

Global mean sea level (GMSL) is now widely recognized to have risen between 1 to 2 mm/yr depending on location since the 20th century. Prior to the satellite altimetry era, GMSL was primarily estimated from a set of secular tide gauge records relative to coastal benchmarks. Recent measurements of GPS (Global Positioning System) have been demonstrated as a useful tool of a direct estimate of Vertical Land Motion (VLM) induced by both long and short-term geophysical and human-induced processes in a geocentric reference frame. This presentation will provide the results of a combination performed using the CATREF software of three independent GPS daily solutions provided by British Isles continuous GNSS Facility – University of Luxembourg consortium (BLT), German Research Centre for Geosciences (GFZ) and University of La Rochelle (ULR) under the auspices of the Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG), that results in a spatially comprehensive map of VLM near or close to tide gauge benchmarks. The combination was performed in accordance with the second re-processing campaign (repro2) of the IGS (International GNSS Service). Long coastal tide gauge records from the archives maintained at the Permanent Service for Mean Sea Level (PSMSL) were extracted for relative sea level estimates. To cross-compare the sea level rates over the years, we employed observations between 1900-2016. Then, the time series were cut and analyzed separately, ceteris paribus, for the period 1960-2016. This analysis was aimed at a cross-comparison of relative sea level trends and their changes over the years. The stochastic part of the tide gauge records was analyzed with Maximum Likelihood Estimation (MLE) and assumed several different combinations of noise models with the Bayesian Information Criterion (BIC) providing a means to identify the preferred one. The relative sea level estimates were corrected by the inverted barometric effect to the tide-gauge records using data from the 20th century Reanalysis project version V2C, the effect of wind stress on the surface of the ocean in both, zonal and meridional components, as well as Pacific Decadal Oscillation (PDO) and the North Pacific Gyre Oscillation (NPGO) influencing Pacific tide gauge records. The GPS-based velocities were corrected by Glacial Isostatic Adjustment (GIA) effect using ICE-6G(VM5a) model with associated geoid rate and post seismic decays using ITRF2014 estimates. Also, environmental loading models were employed to account for present-day elastic loading in VLM. The Mean Sea Level (MSL) trends from tide gauges and VLM-corrected MSL trends using GIA model (TG+GIA) and the TIGA combination (TG+TIGA) were determined. Our final reconstruction of GMSL based on the MSL records from 1900 to 2016 where the VLM uncertainty is smaller than 0.7 mm/yr indicate a long-term trend of 1.75 +/- 0.2 mm/yr and is in good agreement with several similar determinations. [less ▲]

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See detailConventional EO Satellites vs. CubeSats; FDL - AI flood detection onboard a Nano Satellite
Backes, Dietmar UL; Schumann, Guy; Teferle, Felix Norman UL

Scientific Conference (2019, December 11)

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See detailAbsolute Gravity and Uplift in the Yellowstone Caldera
van Dam, Tonie UL; Francis, Olivier UL

Scientific Conference (2019, December 10)

GPS time-series of uplift show that points in and around the caldera have gone through cycles of uplift, followed by subsidence since observations began about three decades ago. A dramatic increase in the ... [more ▼]

GPS time-series of uplift show that points in and around the caldera have gone through cycles of uplift, followed by subsidence since observations began about three decades ago. A dramatic increase in the uplift rate started in 2004 at the GPS station LKWY near Yellowstone Lake and Old Faithful, OFWY. Since 2010, the sites have subsided, began uplifting again in 2014 coincidentally after a M 4.8 earthquake near the Norris Geyser Basin, and then started subsiding again in 2016. The cause of the episodic uplift and subsidence and the spatial pattern of the surface displacement are not yet well understood. The 2003-2009 episode of rapid uplift is believed to result from deep source magma intrusion simultaneous with depressurization of the hydrothermal systems beneath the Norris Geyser Basin. But whether it is caused by the intrusion of magma from a distant reservoir, or by the expulsion and localized trapping of pressurized water and gas from rock that is already in-place, is not known. We have taken observations of absolute gravity at LKWY and OFWY almost annually since 2009. In this presentation, we compare gravity and uplift and provide some insight into the mechanism driving the uplift/subsidence cycles. [less ▲]

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See detailHydrogeological effects on terrestrial gravity measurements
Van Camp, Michel; de Viron, Olivier; Dassargues, Alain et al

Scientific Conference (2019, December 10)

For the 20 last years, terrestrial and satellite gravity measurements have reached such a precision that they allow for identification of the signatures from water storage fluctuations. In particular ... [more ▼]

For the 20 last years, terrestrial and satellite gravity measurements have reached such a precision that they allow for identification of the signatures from water storage fluctuations. In particular, hydrogeological effects induce significant time-correlated signature in the gravity time series. Gravity response to rainfall is a complex function of the local geologic and climatic conditions, e.g., rock porosity, vegetation, evaporation, and runoff rates. The gravity signal combines contributions from many geophysical processes, source separation being a major challenge. At the local scale and short-term, the associated gravimetric signatures often exceed the tectonic and GIA effects, and monitoring gravity changes is a source of information on local groundwater mass balance, and contributes to model calibrations. Some aquifer main characteristics can then be inferred by combining continuous gravity, geophysical and hydrogeological measurements. In Membach, Belgium, a superconducting gravimeter has monitored gravity continuously for more than 24 years. This long time series, together with 300 repeated absolute gravity measurements and environmental monitoring, has provided valuable information on the instrumental, metrological, hydrogeological and geophysical points of view. This has allowed separating the signal sources and monitoring partial saturation dynamics in the unsaturated zone, convective precipitation and evapotranspiration at a scale of up to 1 km², for signals smaller than 1 nm/s², equivalent to 2.5 mm of water. Based on this experience, another superconducting gravimeter was installed in 2014 in the karst zone of Rochefort, Belgium. In a karst area, where the vadose zone is usually thicker than in other contexts, combining gravity measurements at the surface and inside accessible caves is a way to separate the contribution from the unsaturated zone lying between the two instruments, from the saturated zone underneath the cave, and the common mode effects from the atmosphere or other regional processes. Those experiments contribute to the assessment of the terrestrial hydrological cycle, which is a major challenge of the geosciences associated with key societal issues: availability of freshwater, mitigation of flood hazards, or measurement of evapotranspiration. [less ▲]

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See detailMechanical parameters identification of keloid and surrounding healthy skin using Digital Image Correlation measurements in vivo
Elouneg, Aflah; Sutula, Danas; Sensale, Marco UL et al

Scientific Conference (2019, December 09)

The human skin behaves as an elastic membrane initially prestressed but not uniformly. The presence of anatomical sites favorable to the appearance of some tumors, a keloid in our case, while other sites ... [more ▼]

The human skin behaves as an elastic membrane initially prestressed but not uniformly. The presence of anatomical sites favorable to the appearance of some tumors, a keloid in our case, while other sites never develop them attests to the importance of the mechanical environment of the tissue. Thus, a mechanical characterization of the tumored skin is necessary to understand the keloid expansion from a mechanical point of view. Our case study consists in modeling a bi-material structure composed of a keloid skin surrounded by healthy skin located on upper left arm of a young female. From the experimental measurements in vivo, by combining force sensor, displacement sensor and Digital Image Correlation techniques, we perform a mechanical analysis to characterize the mechanical stress fields over the entire area and on the interface ‘healthy skin/keloid skin’. Since the mechanical behavior of the tumorous skin is unknown, many physical models can be implemented and assessed very easily inside the specific digital software to fit with the real data. Once a set of mechanical parameters for both the healthy skin and the keloid skin are identified, the stress fields around the keloid are calculated. Next steps consist in determining matching preferential directions in order to define as precisely as possible the specifications of a device for preventing the growth of keloids. [less ▲]

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See detailParameter identification problem in bimaterial human skin and sensitivity analysis : Uncertainties in biomechanics of skin
Sutula, Danas; Elouneg, Aflah; Sensale, Marco UL et al

Scientific Conference (2019, December 09)

The proposed paper concerns the prediction of the numerical response of a biomechanical structure submitted to an unknown external loading state. The methodology is based on homogeneous and then ... [more ▼]

The proposed paper concerns the prediction of the numerical response of a biomechanical structure submitted to an unknown external loading state. The methodology is based on homogeneous and then heterogeneous structures such as healthy or pathological cutaneous tissues that can be mechanically tested in vivo under a patchy knowledge of boundary conditions. Experimental data corresponding to the extension of a piece of skin located between two pads with displacement enslavement, represent input data to the numerical model. Data are reaction force on one pad and displacement field between the two pads and all around. The numerical model consists of a representation of the bi-material domain geometry with neo-hookean behaviors. The boundary conditions and loadings of the experimental extension test are imposed. The materials parameters have been identified by inverse method starting from a constrained cost function minimizing the difference between the calculated displacements field and experimental displacements field obtained by digital image correlation and taking into account the reaction force as a constraint. An analysis of the model sensitivity to material parameters is presented. [less ▲]

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See detailPsychiatric knowledge dissimination at international conferences (1860-1914): 'those who have the interest of science at heart, don't distinguish between nationalities'
Andersen, Eva UL

Scientific Conference (2019, December 06)

The amount of international conferences that were organised over the nineteenth century increased rapidly, and formed an ideal environment for discussions amongst peers and establishing knowledge ... [more ▼]

The amount of international conferences that were organised over the nineteenth century increased rapidly, and formed an ideal environment for discussions amongst peers and establishing knowledge transfers. Medical and psychiatric conferences were no exception. However, a study into psychiatric conferences on a larger scale has not yet been conducted. Adopting a transnational perspective is essential, and while this approach is gaining more attention from historians more generally, it is only slowly reaching the history of psychiatry. To gain insights into the (inter)national knowledge dissemination that happened within psychiatry, we will examine different organisational aspects such as the locations where conferences were held, its organisation and the subjects and questions that were included in the conference program, as well as studying the mutual connections between congresses and the connections between the participants. This will help to discover the key players and whether it was well-known psychiatrists that were most involved in these international conferences. These interwoven sub-questions will help to establish in how far an international community existed within psychiatry and thus if such international congresses were an epicentre of transnational knowledge dissemination or if they were rather a manifestation of national encounters. This research is based on the minutes and membership lists found within conference proceedings of the “Congrès internationale médecine mentale”, “Congrès international de neurologie, psychiatrie et de physiologie”, “Congrès international de l’assistance aux aliéné” and the “Congrès international de médecine” that also often included a section dedicated to psychiatry. These all took place between the 1860’s and the first decade of the twentieth century. [less ▲]

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See detailScaling of urban heat island & NO2 with urban population: a meta-analysis
Wei, Yufei UL; Caruso, Geoffrey UL; Lemoy, Rémi

Scientific Conference (2019, December 05)

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See detailAccommodation of non-nationals in Luxembourg
Wronska, Iwona; Murdock, Elke UL

Scientific Conference (2019, December 05)

The Grand Duchy of Luxembourg within its current borders was established in the end of 19th century. In the space of less than 150 years the population of this state more than doubled - largely ... [more ▼]

The Grand Duchy of Luxembourg within its current borders was established in the end of 19th century. In the space of less than 150 years the population of this state more than doubled - largely attributable to immigration. Today, 48% of the population are foreigners. We would like to argue that the current immigration policy of Luxembourg is based on the strategy of accommodation. We can identify three major pillars of this strategy. The first pillar creates welcome conditions to adaptation within the host society. The second pillar brings liberal provisions for naturalization and the third pillar offers open and generous admission of refugees. [less ▲]

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See detailDreaming of Constructivist Technology Integration Strategies in Future Teacher Students
Reuter, Robert UL; Busana, Gilbert UL

Scientific Conference (2019, November 27)

Based on previous experiences in preparing future teachers for technology integration (Reuter & Busana, 2017), and based on the recommendations from Kolb’s (2017) Triple E framework about effective uses ... [more ▼]

Based on previous experiences in preparing future teachers for technology integration (Reuter & Busana, 2017), and based on the recommendations from Kolb’s (2017) Triple E framework about effective uses of ICT in education, we have adapted the Educational Technology course in our Initial Teacher Training. Over the years, we have indeed observed that, when given the choice of the type of technology integration strategies, many students designed ICT-based learning and teaching scenarios that implemented a rather teacher-centred teaching model (Roblyer & Doering, 2013). These scenarios were often far from innovative nor did they implement the disruptive potential of ICT in education (Christensen, Horn & Johnson, 2008). In the winter semester 2018-2019 we thus decided to ask our students to design and develop constructivist technology integration scenarios. We assessed the success of this adaptation with the help of our own observations, the semester reports produced by our students and their answers to an end-of-semester course evaluation. In general, we saw that students were able to design rather attractive constructivist learning activities. We also observed that our students were quite surprised that such activities do not require complicated and expensive tools, but that they can be implemented with standard productivity tools. [less ▲]

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See detailDeveloping Multilingual Pedagogies in Early Childhood: a review of the project MuLiPEC
Aleksic, Claudine UL; Aleksic, Gabrijela UL; Mortini, Simone UL et al

Scientific Conference (2019, November 27)

Developing Multilingual Pedagogies in Early Childhood: a review of the project The project MuLiPEC (2016-2019) addresses the need for multilingual pedagogies in early childhood education in Luxembourg. It ... [more ▼]

Developing Multilingual Pedagogies in Early Childhood: a review of the project The project MuLiPEC (2016-2019) addresses the need for multilingual pedagogies in early childhood education in Luxembourg. It offered a professional development (PD) course to develop the practitioners’ knowledge and skills in relation to multilingualism and effective pedagogies as well as their practices, and analysed the effects of the PD on the practitioners and the children’s languaging. We offered a first 15-hour course to 46 practitioners from formal and non-formal education settings. Of these, seven continued during one academic year. They were coached and took part in six network meetings where we discussed their practices. To analyse the results, we drew on observations of the PD and in the research settings, video-recorded activities, and interviews. The results show that all 46 participants opened up to multilingual education and deepened their understanding of multilingualism, language development and multilingual pedagogies. Furthermore, the seven focus practitioners implemented activities in multiple languages and deployed effective language supportive strategies. Five of them developed holistic and child-centred multilingual pedagogies. This paper presents these positive findings and raises questions related to the sustainability of PD course and the need to continue the implementation of these effective pedagogies. [less ▲]

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See detailA professional development course in translanguaging: Challenges and opportunities
Aleksic, Gabrijela UL; Dzoen, Bebic-Crestany

Scientific Conference (2019, November 27)

In Luxembourg, the new law in 2017 has declared multilingual early education mandatory. Not only that teachers need to help children develop their Luxembourgish, but also they need to familiarize them ... [more ▼]

In Luxembourg, the new law in 2017 has declared multilingual early education mandatory. Not only that teachers need to help children develop their Luxembourgish, but also they need to familiarize them with French and value their home languages. In order to support preschool teachers in this endeavour, our project aims to: (1) offer a professional development (PD) course in translanguaging, (2) involve children’s families to reinforce home-school collaboration, and (3) foster children’s cognitive, linguistic, and socio-emotional engagement in the classroom. We use a panoply of measures to reach our aims: focus groups and teacher questionnaires (aim 1), parent questionnaires and interviews (aim 2), a test in early literacy and numeracy in school and home languages, teacher assessment of children’s socio-emotional development and video observations with children (aim 3). Translanguaging, the main topic of our 22 hour PD course (June – December 2019), is the use of a full linguistic repertoire to make meaning (Otheguy, García, & Reid, 2015). In eight sessions, we explore multilingual ecology, parental involvement, and oracy and early literacy. We will present preliminary findings of the focus groups with teachers and tests in early literacy and numeracy in children’s home and school languages. Challenges and opportunities that emerged during the course will be explored as well. [less ▲]

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See detailAu-delà du cours magistral: Vers des apprentissages autonomes et collaboratifs basés sur de « grandes questions »
Busana, Gilbert UL; Reuter, Robert UL

Scientific Conference (2019, November 22)

Nous enseignions depuis quelques années un cours de première année sur "l'éducation à l'ère numérique", dans la formation initiale des futur-e-s enseignant-e-s du fondamental, sous forme d’un cours ... [more ▼]

Nous enseignions depuis quelques années un cours de première année sur "l'éducation à l'ère numérique", dans la formation initiale des futur-e-s enseignant-e-s du fondamental, sous forme d’un cours magistral afin de véhiculer certaines connaissances théoriques et pratiques dans ce domaine. Cependant, nous avons observé au cours des dernières années que (1) de nombreux étudiants échouaient à l'examen et que (2) beaucoup d'entre eux, lorsqu'ils étaient en 4e année, avaient oublié la plupart des fondements. Ces considérations nous ont amenés à repenser et à remanier nos méthodes d'enseignement et notre façon d'évaluer les résultats d'apprentissage des étudiant-e-s. Après une première implémentation de notre nouvelle approche pédagogique combinant diverses méthodes actives d'apprentissage au semestre d’hiver 2018 (décrite et réfléchie dans Reuter & Busana, 2018), nous avons effectué quelques modifications basées (a) sur nos propres observations et réflexions ainsi que (b) sur les commentaires des étudiant-e-s tirées de l’évaluation du cours (organisée par notre université). Dès à présent, plutôt que de les faire travailler sur de « grandes questions » (c.-à-d. des questions pour lesquelles il n'y a pas de réponses simples et faciles à consulter) au cours des séances en présentiel, nous demandons maintenant à nos étudiant-e-s (1) de construire individuellement des connaissances en amont du séminaire sur base de ressources fournies ou tirés de recherches bibliographiques autonomes ; (2) de les présenter, discuter et développer de manière collaborative en petits groupes pendant les séminaires ; puis (3) de les partager et discuter avec nous et leurs pairs et finalement (4) de les conserver dans un portfolio numérique personnel. L’évaluation des apprentissages des étudiant-e-s est effectuée à l’aide de ce portfolio numérique en fin de semestre. [less ▲]

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See detailDie Entstehung einer Hauptstadtregion als deutsch-belgische Beziehungsgeschichte
Brüll, Christoph UL

Scientific Conference (2019, November 22)

Vom 14. Mai - 23. Juli und vom 19. September - 31.Oktober 1972 fand zunächst im Kölner Museum Schnütgen und dann in den Brüsseler Musées Royaux d’Art et d’Histoire die bis heute größte Schau rheinisch ... [more ▼]

Vom 14. Mai - 23. Juli und vom 19. September - 31.Oktober 1972 fand zunächst im Kölner Museum Schnütgen und dann in den Brüsseler Musées Royaux d’Art et d’Histoire die bis heute größte Schau rheinisch-maasländischer Kunst statt. Unter dem Titel „Rhein und Maas. Kunst und Kultur 800-1400“ wurde sie zu einem großen Publikumserfolg, der auch in der Scientific Community der Kunsthistoriker einige Aufmerksamkeit erregte. Die Entstehung der Ausstellung sagt einiges über die Geschichte der Wissenschaftsbeziehungen zwischen Deutschland und Belgien seit 1945 aus, aber auch, so die Ausgangshypothese meines Beitrags, über die Veränderungen der in Belgien vorherrschenden Mental Maps von Deutschland seit der Verlagerung des politischen Schwerpunktes an den Rhein mit der Gründung der Bundesrepublik. Der belgische Deutschlanddiskurs knüpfte dabei durchaus an bereits bestehende Deutschlandbilder an, die gerade das Maasland als Zwischenraum inszenierten , doch kam durch das Zusammenrücken der westeuropäischen Länder im Zuge von Kaltem Krieg und beginnender europäischer Integration, gerade auch unter dem Signum des Abendlandes, eine neue Dimension ins Spiel. Mentalitätsgeschichtlich hob die rheinische Bonner Republik die durch den Ersten Weltkrieg hervorgerufene Distanz zwischen dem belgischen Staat und (West-)Deutschland auf, politikgeschichtlich fanden deutsche und belgische „Suche nach Sicherheit“ (E. Conze) ein enges Kooperationsfeld. Zum Zentrum der belgischen Aktivität im Rheinland wurde Köln, das nach dem durch die Wahl als Regierungssitz notwendig gewordenen Verlassen Bonns durch die belgischen Truppen in Deutschland 1950 zu deren neuem Hauptquartier wurde. Dort etablierte sich zudem rasch das Belgische Haus als Drehscheibe für politischen, konsularischen, aber auch kulturellen Austausch. Die Ausstellung „Rhein und Maas“ dient als Aufhänger für den Beitrag, der sowohl das Ende einer langen Nachkriegszeit als auch das Ankommen Belgiens in der Bonner Republik herausstellen kann. Auch die Anfang der 1970er Jahre erfolgten ersten gegenseitigen Staatsbesuche geben Aufschluss über Inszenierung und Wahrnehmung der Hauptstadtregion. Der Beitrag wirft somit eine beziehungsgeschichtliche Perspektive auf Bonn-Köln-Düsseldorf zwischen 1949 und den 1970er Jahren und fragt mit Bezug auf die Hauptstadtregion auf die belgische(n) Wahrnehmung(en) des Rheinischen, aber auch nach Rückwirkungen auf Brüssel als belgischer und europäischer Hauptstadt. [less ▲]

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See detailMono-static Automotive Joint Radar-Communications System
Dokhanchi, Sayed Hossein UL; Ottersten, Björn UL

Scientific Conference (2019, November 21)

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See detailOral History as a multimedia and multidimensional presentation challenge
Lambert, Douglas UL

Scientific Conference (2019, November 13)

Oral History is a multidisciplinary, multinational field based on a format of recorded, usually sit-down interviews, where the past is documented through personal narratives of life experience. In the ... [more ▼]

Oral History is a multidisciplinary, multinational field based on a format of recorded, usually sit-down interviews, where the past is documented through personal narratives of life experience. In the early 2000’s, a new approach to processing and managing oral histories was introduced based on timecode indexing made possible by software environments. This work can be referred to as Oral History Digital Indexing (OHDI), and it represents a suite of activities, tools, methods, and interfaces that have made oral histories more accessible both with and without transcripts, whilst reconnecting navigable text to original recordings for listening and watching. OHDI allows for oral history to be represented in visual, dynamic forms far more palatable to users than the previous default--a collection of transcripts. Pioneering OHDI work was done by Michael Frisch and The Randforce Associates, with whom the author worked with on a number of consulting projects between 2002 and 2018. The focus of these projects was distinctly on comprehensive timecode indexing, the use of annotation as an alternative to word-for-word transcription, and deployment of custom controlled vocabularies (CVs) organized visually as a spatially-meaningful content map. These CVs function like back-of-the-book term indexes providing better “front end” user access, but they have they also been adapted for research applications to organize sets of qualitative analysis codes. Through a post-doctoral research position at the University of Luxembourg, the author is introducing and integrating these OHDI methods into oral history development plans in Luxembourg. Several representative tools, interfaces, and CVs used to make oral histories more multimedia and multidimensional will be presented, all of which will be influential to the in-development “Luxembourgish Oral History Initiative.” [less ▲]

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See detailThe 2004 Afghan Constitution and Islam Merits and Challenges
Al Hajjaji, Shams Al Din UL

Scientific Conference (2019, November 11)

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