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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)

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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 detailMeasuring multicultural ideology: Scale development and validation in different languages and contexts
Stogianni, Maria UL; Schmidt, Lea Marie; Murdock, Elke UL et al

Scientific Conference (2021, July)

Increased migration has led to the formation of culturally diverse societies in many places around the world. The concept of Multicultural Ideology incorporates two values as a way to promote positive ... [more ▼]

Increased migration has led to the formation of culturally diverse societies in many places around the world. The concept of Multicultural Ideology incorporates two values as a way to promote positive intercultural relations: 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 and marginalization. In line with this notion, an international research consortium is developing a revised version of the Multicultural Ideology Scale to assess the endorsement of multicultural ideology in different national contexts. The scale aims to distinguish various attitudinal dimensions of multiculturalism, relevant to the acceptance of diversity and social inclusion of different ethnocultural groups: Cultural Maintenance, Social Interaction, Equity/Inclusion, Extent of Differences, Conflictual Relations, Essentialistic Boundaries. We present the first assessment of the new scale in the German language. The survey was administered online to a sample of native German citizens (N = 382) with different demographic characteristics. Our aim was to understand the attitude of native citizens towards cultural diversity and their willingness to have members of ethnic minority groups be included in the larger society. We investigated the factor structure of the scale, its psychometric properties, and the relationship between multicultural ideology and some individual difference variables, such as ethnic group attachment and social dominance orientation. [less ▲]

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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 detailKnowledge assessment with concept maps: Opportunities and challenges
Rohles, Björn UL; Koenig, Vincent UL; Fischbach, Antoine UL et al

Scientific Conference (2021, July)

21st-century digital society poses tremendous challenges for education and assessment. Learners have to understand the complex relations between diverse topics and learn how to learn their entire lives ... [more ▼]

21st-century digital society poses tremendous challenges for education and assessment. Learners have to understand the complex relations between diverse topics and learn how to learn their entire lives. Concept mapping is a promising approach to address these issues. It is a method that uses concepts connected by labeled links to visualize a semantic network of knowledge. Concept mapping is predestined for a digital approach because it allows for easy interactive editing, innovative test items, and incorporation of multimodal information. Concept mapping is available for summative and formative assessment and, thus, provides the opportunity to become a vital part of modern education. The biggest advantage of concept mapping (i.e., a comprehensive and yet comprehensible visualization of complex relations) also represents the biggest challenge when it comes to assessment with - and scoring of - concept maps. The first challenge is the enormous amount of indicators used for scoring concept maps in assessment. A second challenge comes from the fact that educators using concept mapping in their assessment have to understand and interpret the indicators that are used in scoring concept maps. This presentation reports on a Ph.D. project that investigates digital concept mapping in the context of knowledge assessment from a user experience perspective. The results are based on, first, a comprehensive international systematic literature review on concept map scoring, and second, three empirical studies covering the needs and experiences of learners and educators in concept mapping. It presents key findings from the iterative user experience design of a concept mapping tool as part of the online assessment platform OASYS, an overview of indicators used in concept map scoring, and research opportunities in knowledge assessment with concept maps. Finally, it stresses the value that user experience design brings to knowledge assessment with concept maps. [less ▲]

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See detailA design strategy for phase synchronization in Precoding-enabled DVB-S2X user terminals
Martinez Marrero, Liz UL; Merlano Duncan, Juan Carlos UL; Querol, Jorge UL et al

Scientific Conference (2021, June)

This paper address the design of a phase tracking block for the DVB-S2X user terminals in a satellite precoding system. The spectral characteristics of the phase noise introduced by the oscillator, the ... [more ▼]

This paper address the design of a phase tracking block for the DVB-S2X user terminals in a satellite precoding system. The spectral characteristics of the phase noise introduced by the oscillator, the channel, and the thermal noise at the receiver are taken into account. Using the expected phase noise mask, the optimal parameters for a second-order PLL intended to track channel variations from the pilots are calculated. To validate the results a Simulink model was implemented considering the characteristics of the hardware prototype. The performance of the design was evaluated in terms of the accuracy and stability for the frame structure of superframe Format 2, as described in Annex E of DVB-S2X. [less ▲]

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See detailOffice Agents: Personal Office Vitality Sensors with Intent
Stamhuis, Sjoerd; Brombacher, Hans; Vos, Steven et al

Scientific Conference (2021, May)

In smart office buildings, almost every aspect of the environment can be assessed and adjusted by sensors. Yet employees rarely have access to the data collected to act upon it. It is also unclear what ... [more ▼]

In smart office buildings, almost every aspect of the environment can be assessed and adjusted by sensors. Yet employees rarely have access to the data collected to act upon it. It is also unclear what they would find meaningful to follow the recommendations on healthy work conditions and behavior, while productivity is the priority. The Office Agents are a set of artefacts placed on the employee’s desk, which capture data about the office environment. Air quality, sound level, light exposure, productivity, and physical activity level are measured to provide office workers with feedback on the ‘best’ working conditions. Using speculative design and Objects with Intent, the employee engages in a negotiation with the Office Agents based on the office ecosystem. Through this project and interactivity session, we open a debate on the use of sensors in office environments and the stakes around office vitality from the viewpoint of the employees. [less ▲]

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See detailThe Hormones of Dark Souls: The Dark Tetrad and Violent Gaming Effects on Aggression, Cortisol and Testosterone Levels
Wagener, Gary; Felten, Andrea; Melzer, André UL

Scientific Conference (2021, May)

Although playing violent video games may lead to detrimental effects on cognition, emotion and behavior, the role of hormones and its interplay with personality characteristics is not well understood. An ... [more ▼]

Although playing violent video games may lead to detrimental effects on cognition, emotion and behavior, the role of hormones and its interplay with personality characteristics is not well understood. An experimental study tested how playing a violent versus non-violent video game affects cortisol and testosterone levels, whether these hormonal changes increase implicit aggressive cognition, and whether Dark Tetrad personality traits moderate these effects. In an experimental design, 54 male participants played either a violent or a non-violent video game. Participants provided salivary samples at the beginning of the experiment (T1), right after 25 minutes of gameplay (T2), and 20 minutes after that (T3). There were no significant effects on implicit aggressive cognition. However, participants in the violent game condition had a significant decrease in cortisol levels (T1 to T2) and a significant negative trend in cortisol levels from T1 to T3. Participants with higher Machiavellianism scores in the violent condition had a stronger decrease in cortisol (T1 to T2). In contrast, participants with higher Machiavellianism scores in the non-violent condition had a higher increase in cortisol (T1 to T2). The present findings illustrate the complex interplay between personality, hormones, and game content, thus specifying current notions on violent game effects. [less ▲]

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See detailDesigning and managing an online, personalised research writing course for postgraduates
Deroey, Katrien UL; Skipp, Jennifer

Scientific Conference (2021, April 08)

This paper describes and evaluates an online research article writing course at the University of Luxembourg. Participants were self-referred PhD students from different disciplines. The aim of the ten ... [more ▼]

This paper describes and evaluates an online research article writing course at the University of Luxembourg. Participants were self-referred PhD students from different disciplines. The aim of the ten-week course is to improve insight into the structural, stylistic and rhetorical features of research articles as well as the writing and publication process. It also provides tools for students to develop their own writing. We will situate our course rationale and design within the literature, then compare these to both the reality of managing and delivering the course online as well as participants’ feedback as reflected in 30 surveys. We will focus on the following results: • The practicability of including multiple pedagogical elements in an online course was challenging. We wanted to integrate both independent and collaborative work, production and reflection. However, results of the surveys and our own experience show that the multiplicity of elements was often seen as complex and difficult to manage and multiple submission deadlines problematic. • Students favoured working alone over working together and uptake of writing groups (Aitchison, 2009) was poor. Multi-disciplinary peer groups were, however, positively reviewed (cf. Hyland, 2012). • The flexibility of the online environment was seen as positive, yet many reported problems finding time to write. However, participants did see the benefit in having to write regularly. Tools of reflection did not score highly. • The personalisation of learning input scored highly in the survey, but this was time-consuming to implement. Whilst instructor-student consultations were offered to further personalise feedback, these had a low uptake (8/30). • We wanted to create a course which included guidance on the writing and publication process (Starfield & Paltridge, 2016) as well as increased genre awareness (Swales, 1990) to prepare students for publication. However, tasks on language and structure were rated more useful by more students than this content. • More participants commented on the benefit of working through their language issues in live sessions over learning how to address language issues through the corpus-tools that were integrated into the course (Charles, 2018). Through sharing this information, we hope to generate a discussion with the audience about ways to optimise online writing courses and manage some of the problems associated with online delivery. Aitchison, C. (2009). Writing groups for doctoral education. Studies in Higher Education, 34(8), 905-916. Charles, M. (2018) Corpus-assisted editing for doctoral students: More than just concordancing. Journal of English for Academic Purposes, 36, 15-26. Charles, M. (2018). Using do-it-yourself-corpora in EAP: A tailor-made resource for teachers and students. Teaching English for Specific and Academic Purposes, 6(2), 217-224. Hyland, K. (2012). Disciplinary Identities: Individuality and Community in Academic Discourse. Cambridge: Cambridge University Press. Nesi, H. & Gardener, S. (2012). Genres across the disciplines: Student writing in higher education. Cambridge: Cambridge University Press. Paltridge, B., & Starfield, S. (2016). Getting published in academic journals: Navigating the publication process. Ann Arbor: University of Michigan Press. Swales, J. (1990). Genre analysis: English in academic and research settings. Cambridge: Cambridge University Press. [less ▲]

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See detailDesigning EMI lecturer training programmes: what and how
Deroey, Katrien UL

Scientific Conference (2021, April 08)

This workshop will provide insights into designing and delivering English Medium Instruction (EMI) lecturer training. Although universities have been slow to organize EMI lecturer support, an increasing ... [more ▼]

This workshop will provide insights into designing and delivering English Medium Instruction (EMI) lecturer training. Although universities have been slow to organize EMI lecturer support, an increasing awareness of the challenges faced by EMI lecturers and their students now appears to be boosting the demand for EMI lecturer training and support initiatives. Consequently, EAP practitioners can increasingly expect requests to design and deliver such programmes. However, the efficient design and delivery of EMI lecturing training and support is a complex challenge. First, the EMI context is very varied and initiatives should be adapted to the local cultural, educational, linguistic and institutional contexts (Herington, 2020; Martinez & Fernandes, 2020; Tuomainen, 2018). Second, most literature highlights the need for language, pedagogical and intercultural components (e.g. Fortanet Gómez, 2020). Third, we need to be sensitive to lecturers’ attitudes towards EMI and EMI training (Tsui, 2018). Fourth, there are practical considerations such as the timely provision of support (Guarda & Helm, 2017), promoting participation, facilitating learning transfer to lectures, and optimizing the support in view of what are often heterogeneous participant groups in terms of English proficiency, (EMI) lecturing experience and discipline (Ball & Lindsay, 2013). Finally, the design of these programmes typically needs to happen with very limited institutional resources, few (if any) published materials and relatively little published research on lecture discourse and EMI lecturer training. The workshop will start with an overview of published training initiatives with their reported successes and challenges (Deroey, 2021). Next, participants will work in small groups, brainstorming ideas for an EMI support programme based on a brief we have recently received at the multilingual University of Luxembourg Language Centre. Finally, these proposals will be discussed in the whole group and key ideas summarized to consolidate the insights gained. Ball, P., & Lindsay, D. (2013). Language demands and support for English-medium instruction in tertiary education. Learning from a specific context In A. Doiz, D. Lasagabaster, & J. M. Sierra (Eds.), English-medium instruction at universities: Global challenges (pp. 44-61). Bristol: Multilingual Matters. -Deroey, K. L. B. (2021). Lecturer training for English Medium Instruction: what and how? In B. D. Bond, A. & M. Evans (Ed.), Innovation, exploration and transformation. Proceedings of the 2019 BALEAP Conference. Reading: Garnet. -Fortanet Gómez, I. (2020). The dimensions of EMI in the international classroom: training teachers for the future university. In M. Del Mar Sánchez-Pérez (Ed.), Teacher training for English-medium instruction in higher education (pp. 1-20). Hershey: IGI Global. -Guarda, M., & Helm, F. (2017). A survey of lecturers’ needs and feedback on EMI training. In K. Ackerley, M. Guarda, & F. Helm (Eds.), Sharing perspectives on English-medium instruction (pp. 167-194). Bern: Peter Lang. -Herington, R. (2020). Observation as a tool to facilitate the professional development of teaching faculty involved in English as a Medium of Instruction: trainer and trainee perspectives. In M. L. Carrió-Pasto (Ed.), Internationalising Learning in Higher Education (pp. 65-82). Hershey: IGI Global. -Martinez, R., & Fernandes, K. (2020). Development of a teacher training course for English medium instruction for higher education professors in Brazil. In M. Del Mar Sánchez-Pérez (Ed.), Teacher Training for English-Medium Instruction in Higher Education (pp. 125-152). Hershey: IGI Global. -Tuomainen, S. (2018). Supporting non-native university lecturers with English-medium instruction. Journal of Applied Research in Higher Education. 10(3), 230-242. -Tsui, C. (2018). Teacher efficacy: a case study of faculty beliefs in an English-medium instruction teacher training program. Taiwan Journal of TESOL, 15(1), 101-128. [less ▲]

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See detailTransition from traditional to hybrid to online courses for pre-service elementary school teachers at the University of Luxembourg: STEAM integrated approach in the project MathEduc @ BScE
Kreis, Yves UL; Haas, Ben

Scientific Conference (2021, April 07)

During the past year, technology has started enabling new forms of teaching and learning in higher education in Luxemburg. Thus, to be able to work more closely with elementary school pre-service teachers ... [more ▼]

During the past year, technology has started enabling new forms of teaching and learning in higher education in Luxemburg. Thus, to be able to work more closely with elementary school pre-service teachers, we shifted our mathematics education course during the past years to flipped classroom approaches and worked with synchronous and asynchronous teaching on- and off-campus modes. Furthermore, due to the restrictions of the COVID-19 pandemic, we decided to shift our teaching to entirely online flipped classroom approaches together with outdoor mathematical trails with STEAM integrated assessments. This final shift to a fully online flipped classroom, with self-paced, student-centred teachings and learnings, showed strong positive effects on pre-service elementary school teachers in mathematics teaching. In this presentation, we will outline results of this transition period and describe results from different studies. [less ▲]

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See detailThe STEAM skilled child: How children can learn to apply STEAM skills to their living environment
Haas, Ben; Kreis, Yves UL; Lavicza, Zsolt

Scientific Conference (2021, April 01)

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See detailThe role of European Migration Network in supporting European migration policymakers: Mechanisms, Tools and contemporary challenges
Sommarribas, Adolfo UL

Scientific Conference (2021, March 26)

The role of the EMN in the collection of information to provide timely, comparable information to EU and national policymakers.

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See detailCan Iceland learn from Luxembourg? Understanding the host country perspective in an increasingly plural composed society
Murdock, Elke UL

Scientific Conference (2021, March 26)

Luxembourg and Iceland are very different In terms of geography, but both countries have experienced dramatic changes in terms of their population structure in recent years. With 41 immigrants per 1000 ... [more ▼]

Luxembourg and Iceland are very different In terms of geography, but both countries have experienced dramatic changes in terms of their population structure in recent years. With 41 immigrants per 1000 inhabitants, Luxembourg had the second highest number of immigrants per inhabitants in Europe in 2017 with Iceland, at 35.5, coming a close second. Since the 60s, Luxembourg’s population nearly doubled and today the foreign population percentage stands at 47.5%. Until the turn of the century, Iceland’s foreign population stood at around 2%, rising steadily over the last 20 years and today stands at 14.4% - having doubled in the last 10 years. Migration studies often focus on the immigrant perspective, but especially when numbers rise, the host country perspective is important. In Luxembourg, we conducted several studies into the attitude towards multiculturalism among the host society. The Inclusive Societies – Iceland project investigated both, the experience of immigrants to Iceland but also the attitude of the native population towards immigrants. Findings from this quantitative study covering 3630 native Icelanders (51.1% women, MAge = 50.8, SD = 15.6), spread across all regions of Iceland will be presented and parallels drawn with findings from Luxembourg. Particular focus will be placed on demographic variables, language, culture contact and citizenship influencing the attitude towards a diverse society. Understanding the attitudes towards immigrants and diversity ideologies held by the native population is important, as these will determine acculturation options open to immigrants. Implications will be discussed in light of empirical findings in Luxembourg and Iceland. [less ▲]

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See detailMixed-methods research in STEAM outdoor trails in elementary school pre-service teacher training
Haas, Ben; Kreis, Yves UL; Lavicza, Zsolt

Scientific Conference (2021, March 25)

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See detailDie Burg in St. Vith - Eine typisch „sponheimische“ Anlage?
Uhrmacher, Martin UL

Scientific Conference (2021, March 25)

Der Vortrag geht zwei Leitfragen nach: 1) Wer kommt als Erbauer der kürzlich archäologisch nachgewiesenen Burg in St. Vith in Frage? 2) Entspricht die Burg in ihrer repräsentativen und fortifikatorischen ... [more ▼]

Der Vortrag geht zwei Leitfragen nach: 1) Wer kommt als Erbauer der kürzlich archäologisch nachgewiesenen Burg in St. Vith in Frage? 2) Entspricht die Burg in ihrer repräsentativen und fortifikatorischen Gestaltung eventuell einem „sponheimischen Burgentypus“? [less ▲]

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See detailDie Pädagogik des Translanguaging: Möglichkeiten und Herausforderungen
Kirsch, Claudine UL

Scientific Conference (2021, March 20)

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See detail3D Modelling in online learning for pre-service elementary school teachers at the University of Luxembourg
Kreis, Yves UL; Haas, Ben; Lavicza, Zsolt

Scientific Conference (2021, March 19)

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See detailDigital history and the politics of digitization
Zaagsma, Gerben UL

Scientific Conference (2021, March 10)

This paper addresses the question of the politics of (cultural heritage) digitisation and its consequences for historical research. To put it simply, it discusses the question of why, where and how we can ... [more ▼]

This paper addresses the question of the politics of (cultural heritage) digitisation and its consequences for historical research. To put it simply, it discusses the question of why, where and how we can access what we can access. The online documentary record affects historical research and we need to understand how and in what ways our online evidentiary basis is constituted and might affect our research. [less ▲]

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See detailAccess to housing and education for children in migration: challenges and good practices
Sommarribas, Adolfo UL

Scientific Conference (2021, March 10)

This presentation focus on the access to housing and education for children in migration, the challenges confronted and the good practices detected.

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See detailExploring the History of Digital History
Zaagsma, Gerben UL

Scientific Conference (2021, March 01)

This short paper will present the first results, and outline my new project which investigates the early trajectories of history and computing and focuses on the networks of computing historians in the ... [more ▼]

This short paper will present the first results, and outline my new project which investigates the early trajectories of history and computing and focuses on the networks of computing historians in the pre-PC and early PC period. [less ▲]

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See detailDeliberative constitution-making in Luxembourg
Burks, Deven UL; Kies, Raphaël UL

Scientific Conference (2021, February 26)

Luxembourg is a small constitutional monarchy and parliamentary democracy. Since its 1868 ratification, the Constitution of Luxembourg has been amended 35 times, so the document resembles more and more a ... [more ▼]

Luxembourg is a small constitutional monarchy and parliamentary democracy. Since its 1868 ratification, the Constitution of Luxembourg has been amended 35 times, so the document resembles more and more a patchwork quilt of basic institutions. Yet the past twenty years have seen a consensus amongst Luxembourg’s constitutional players on the need for modernization, motivated by the desire for a more coherent constitution. Article 114 vests the Chamber of Deputies with the power to initiate and to approve constitutional amendments in a two-step process. This has several consequences for deliberation. First, it is largely restricted to political elites because formal amendment powers rest solely with the Chamber. Second, there is little to no empowered maxi-public deliberation unless the Government supports a citizen consultation. Following the 2013 parliamentary elections, the new Government planned a two-part referendum on constitutional reform in summer 2015 and in winter 2015. The first referendum was intended to seek popular input on four proposals which voters rejected by large margins, and the second referendum was later scrapped. Nevertheless, this reform process has seen some participatory and deliberative experiments. For the purposes of the present COST Action, three events are of interest. First, charged by the Chamber of Deputies, the UL’s Parliamentary Studies Research Chair at organized in May 2014 CIVILEX, a citizens’ forum modelled along the lines of a 21st century Town Meeting to discuss each of the four referendum questions. Researchers found that group discussion sometimes produced significant shifts in opinion between the pre- and post-deliberation questionnaires. Furthermore, once experts had cleared up certain misunderstandings, citizens ably discussed the referendum proposals. Despite these largely positive experiences, this deliberative experiment remained an isolated experiment and was not renewed during the campaign leading up to the June 2015 referendum. Second, given the first referendum results, the Chamber made a renewed effort in 2015 to involve citizens in the constitutional reform process, so it collected proposals via a new web portal - www.ärvirschléi.lu (Your Recommendation) – and subsequently held a public hearing with those who had initiated proposals. The process yielded some participatory and deliberative outcomes, including the elaboration of several constitutional amendments. For instance, Chamber members reached consensus on strengthening the rights of children and of animals compared to their original text. Nevertheless, the webportal was not developed as an online deliberative forum and saw limited, self-selected participation. Consequently, though this was the only concrete involvement of citizens in the constitutional reform, it was the least deliberative of the three exercises. Third, since the Government had still planned to call a second referendum to vote on the constitutional reform as a whole, the Chamber again tasked the Chair with gauging public opinion. So, in July 2016, the Chaire organized CONSTITULUX, a new citizens’ forum to discuss the entire draft constitution. Citizens i.) raised pertinent questions, ii.) identified short- and long-term concerns and iii.) suggested improvements to the draft articles. One striking output was that participants were more supportive of the proposed constitutional reform. Like CIVILEX, it generated little concrete action from the Government. Moreover, the incidental and experimental nature of these events again meant that there was little maxi-public engagement. Following the draft constitution’s abandonment in November 2019, it remains to be seen what the future holds for deliberative democracy and constitution-making in Luxembourg. [less ▲]

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See detail3D modelling for pre-service primary school teachers in mathematics education
Kreis, Yves UL; Haas, Ben

Scientific Conference (2021, February 17)

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See detailKeynote: Service Oriented Architecture Chances and Challenges
Gonzalez de Oliveira, Ricardo UL; Chirstian, Kerstan; Henkel, Achim

Scientific Conference (2021, February 11)

Service Oriented Architectures are neither new nor very complicated. Quite the opposite. With the introduction of Ethernet into vehicles service based communication became reality. Therefore, the big SOA ... [more ▼]

Service Oriented Architectures are neither new nor very complicated. Quite the opposite. With the introduction of Ethernet into vehicles service based communication became reality. Therefore, the big SOA dream of independent hardware and software deployment seems to be in reach. Not only SOME/IP faces the challenge of service discovery and situation aware communication. However, automotive industry is far from mobilizing the full potential. The presentation will give an overview about the most crucial challenges we have to tackle and provide some – hopefully – helpful approaches how to overcome them. [less ▲]

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See detailQoS-Predictable SOA on TSN: Insights from a Case-Study
Villanueva, Josetxo; Migge, Jörn; Navet, Nicolas UL

Scientific Conference (2021, February 09)

This work is about the design and configuration of service-oriented communication on top of Ethernet TSN. The first objective is to present takeaways from the design and implementation of the Renault E/E ... [more ▼]

This work is about the design and configuration of service-oriented communication on top of Ethernet TSN. The first objective is to present takeaways from the design and implementation of the Renault E/E Service-Oriented Architecture (SOA) called FACE. In particular, we discuss technological, design and configuration choices made for the SOA, such as how to segment messages (UDP with multiple events, TCP, SOME/IP TP), and the technical possibilities to shape the transmission of the packets on the Ethernet network. The second objective is to study how to ensure the Quality of Service (QoS) required by services. Indeed, services introduce specific challenges, be it only the sheer amount of traffic they generate and if there is a growing body of experiences in the use of TSN QoS mechanisms most of what has been learned so far is mostly about meeting the requirements of individual streams. Less is known for services that involve the transmission of several, possibly segmented, messages with more complex transmission patterns. We show on the FACE architecture how SOME/IP messages were mapped to TSN QoS mechanisms in a manual then automated manner so as to meet the individual requirements of the services in terms of timing, and the system’s requirements in terms of memory usage. [less ▲]

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See detailArtificial Intelligence and Sentencing in Criminal Justice
Allegrezza, Silvia UL

Scientific Conference (2021, January 27)

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See detailUnd was ist mit den Kindern? COVID-Kids: Daten aus der Schweitz
Kirsch, Claudine UL

Scientific Conference (2021, January 18)

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See detailA Distributed Pareto-based Path Planning Algorithm for Autonomous Unmanned Aerial Vehicles (Extended Abstract)
Samir Labib, Nader UL; Danoy, Grégoire UL; Brust, Matthias R. UL et al

Scientific Conference (2021, January 07)

Autonomous Unmanned Aerial Vehicles (UAVs) are in increasing demand thanks to their applicability in a wide range of domains. However, to fully exploit such potential, UAVs should be capable of ... [more ▼]

Autonomous Unmanned Aerial Vehicles (UAVs) are in increasing demand thanks to their applicability in a wide range of domains. However, to fully exploit such potential, UAVs should be capable of intelligently planning their collision-free paths as that impacts greatly the execution quality of their applications. While being a problem well addressed in literature, most presented solutions are either computationally complex centralised approaches or ones not suitable for the multiobjective requirements of most UAV use-cases. This extended abstract introduces ongoing research on a novel distributed Pareto path planning algorithm incorporating a dynamic multi-criteria decision matrix allowing each UAV to plan its collision-free path relying on local knowledge gained via digital stigmergy. The article presents some initial simulations results of a distributed UAV Traffic Management system (UTM) on a weighted multilayer network. [less ▲]

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See detailThe real problem with Rawlsian reasonableness
Burks, Deven UL

Scientific Conference (2021, January 07)

Rawlsian “reasonableness” has been criticized as “loaded” (Stout 2004: 184), “chimerical” (Young 2005: 308) or “entirely circular” (Mulhall and Swift 2003: 483). Yet these reactions often equivocate on ... [more ▼]

Rawlsian “reasonableness” has been criticized as “loaded” (Stout 2004: 184), “chimerical” (Young 2005: 308) or “entirely circular” (Mulhall and Swift 2003: 483). Yet these reactions often equivocate on the meaning of reasonableness (Freeman 2004: 2063-5). Herein, I propose a narrow, immanent criticism whereon the two basic aspects of reasonableness – (A1) proposing and abiding by fair terms of cooperation and (A2) recognizing the “burdens of judgment” (Rawls 1996: 54-8) – may conflict: accepting (A2) may give the person reason to disagree over the need for (A1). To show this, I first restate two aspects of reasonableness as a biconditional: a person is reasonable iff (A1) and (A2) obtain. I then examine whether the five burdens give reason to doubt the requirement in (A1). I find that each burden gives at least some reason to doubt just this requirement and conclude that Rawlsian reasonableness is inconsistent and in need of reformulation. This analysis yields two striking conclusions. First, public reason becomes looser and shifts to the domain of politics where one sees what public reasons others may in fact accept (Laden 2001). Seen from a different angle, one need not accept the idea that the first basic aspect and, hence, Rawlsian reasonableness are necessary conditions of political justification under conditions of reasonable pluralism (contra Krasnoff 2014: 696-7): rejecting this aspect and reasonableness in no way means that there can be no political justification under conditions of (reasonable) pluralism. Second, when conceiving justification and discourse, Rawls may be committed, despite himself, to accepting “reasonableness pluralism”, i.e. the view that there exist distinct, possibly irreconcilable accounts of reasonableness to which one may appeal when conceiving justification and discourse. Their combination may lead to a public reason liberalism framework which is at once looser and more actionable. [less ▲]

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See detailA CutFEM Method for a spatial resolved energy metabolism model in complex cellular geometries
Farina, Sofia UL

Scientific Conference (2021, January)

Computational techniques have been widely used to tackle problems in the biological sciences. A com- promise between high quality simulations and simple but accurate models can help to understand un ... [more ▼]

Computational techniques have been widely used to tackle problems in the biological sciences. A com- promise between high quality simulations and simple but accurate models can help to understand un- known aspects of this field. In this work, we will show how the Cut Finite Element Method (CutFEM) [1] can be a powerful tool to solve a reaction diffusion PDE system that models the energy metabolism of a cell. The main difficulty to approach this problem is dealing with the morphology of the cell that can have sharp edges and evolves over time. While classical FEM requires the mesh conform to the domain boundary, CutFEM allows a non-conforming discretisation of the domain, and thus is especially suited for modeling complex and evolving cellular geometries. First, we introduce our simplified model for metabolic pathways taking place in a region small enough to consider the material property as homogeneous. The results obtained with FEM (FENICS Project [2][3]) and CutFEM suggest that the two methods are equivalent. This allows us to use CutFEM to increase the complexity of the domain, from a spherical shaped cell to an irregular astrocyte. We conclude that CutFEM is a robust method for tackling biological problems with complex geometries, opening the possibility to extend the complexity of our mathematical model including more features and to consider real cellular shapes that evolve in time in future work. [less ▲]

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See detailCommunity Detection in Complex Networks: A Survey on Local Approaches
Esmaeilzadeh Dilmaghani, Saharnaz UL; Brust, Matthias R. UL; Danoy, Grégoire UL et al

Scientific Conference (2021)

Early approaches of community detection algorithms often depend on the network’s global structure with a time complexity correlated to the network size. Local algorithms emerged as a more efficient ... [more ▼]

Early approaches of community detection algorithms often depend on the network’s global structure with a time complexity correlated to the network size. Local algorithms emerged as a more efficient solution to deal with large-scale networks with millions to billions of nodes. This methodology has shifted the attention from global structure towards the local level to deal with a network using only a portion of nodes. Investigating the state-of-the-art, we notice the absence of a standard definition of locality between community detection algorithms. Different goals have been explored under the local terminology of community detection approaches that can be misunderstood. This paper probes existing contributions to extract the scopes where an algorithm performs locally. Our purpose is to interpret the concept of locality in community detection algorithms. We propose a locality exploration scheme to investigate the concept of locality at each stage of an existing community detection workflow. We summarized terminologies concerning the locality in the state-of-the-art community detection approaches. In some cases, we observe how different terms are used for the same concept. We demonstrate the applicability of our algorithm by providing a review of some algorithms using our proposed scheme. Our review highlights a research gap in community detection algorithms and initiates new research topics in this domain. [less ▲]

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See detailWind Music during the Nazi occupation in Luxembourg from 1940 to 1944
Sagrillo, Damien François UL

Scientific Conference (2020, December 18)

From 1940 to 1944 Luxembourg was governed by the National Socialist regime. Besides the many human destinies, social life also had to bear the consequences. The keyword is "Gleichschaltung" (co-ordination ... [more ▼]

From 1940 to 1944 Luxembourg was governed by the National Socialist regime. Besides the many human destinies, social life also had to bear the consequences. The keyword is "Gleichschaltung" (co-ordination). In my lecture, I will provide some examples to show how this abusive and arbitrary interference affected the activities of the music associations. [less ▲]

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See detailMultipath Mitigation Maps feasibility and applicability as an International GNSS Service product
Hunegnaw, Addisu UL; Teferle, Felix Norman UL; Elgered, Gunnar et al

Scientific Conference (2020, December 17)

There have been many advances in the modeling of Global Navigation Satellite System (GNSS) observables when estimating position and other parameters of interest. Some of these bias models are related to ... [more ▼]

There have been many advances in the modeling of Global Navigation Satellite System (GNSS) observables when estimating position and other parameters of interest. Some of these bias models are related to improvements of reference frames, phase center offsets and variations of transmitter and receiver antennas, satellite orbits and clocks, and troposphere. Nonetheless, multipath remains for the most part an unmodelled source of error which causes range errors in the GNSS observations. The associated effects show highly localized features and have a different impact for each receiver and antenna. Multipath errors can propagate, can cause in-situ position biases and are also contributing to the prevalent draconitic harmonic signals. In order to mitigate the problem we generate site-specific corrections by employing a suitable averaging scheme for the stacking of carrier phase residuals. Our processing is based on globally distributed static multi-GNSS observations using several scientific GNSS software packages (Bernese GNSS Software, NAPEOS, GAMIT-GLOBK, and CSRS-PPP). Our multipath stacking maps (MPS) use the stacking of carrier phase residuals generated by variable azimuth cell size (congruent cells) and by allocating carrier phase residuals in each cell to generate the correction maps, unlike the standard fixed azimuth cell resolution approaches. This reduces the binning of fewer residuals at higher elevation angles. Before stacking, we also apply rigorous statistical outlier screening tests for each one-way post-fit carrier phase residual assigned to each of the congruent cells. We thus correct the multipath effects by subtracting the stacked multipath map from the post-fit carrier phase residual. Using this technique we produce a model available in the form of the Antenna Exchange (ANTEX) file format, that can potentially be implemented in routine GNSS analysis with no or little additional overhead for individual analysis centers (ACs). In this study, we assess the feasibility and applicability of the MPS maps as an International GNSS Service (IGS) product for routine GNSS analysis. We demonstrate the multipath stacking technique to result in a significant reduction of the variation in the one-way post-fit carrier phase residuals from multi-GNSS observations. [less ▲]

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See detailVertical Land Movements and Sea Level Changes on South Georgia, South Atlantic Ocean: Results from 7 Years of Geodetic and Oceanographic Observations on a Remote Island
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Hibbert, Angela et al

Scientific Conference (2020, December 16)

South Georgia Island in the South Atlantic Ocean, is a small remote land mass that supports various ground-based instrumental observations (Global Navigation Satellite System (GNSS), tide gauge ... [more ▼]

South Georgia Island in the South Atlantic Ocean, is a small remote land mass that supports various ground-based instrumental observations (Global Navigation Satellite System (GNSS), tide gauge, meteorological and seismic) in an otherwise largely under sampled oceanic region. Moreover, the South Atlantic Ocean plays an important role in global ocean circulation, con-necting the deep thermohaline circulation of the North Atlantic and Indian Oceans, whilst also linking to the Antarctic Circumpolar Current in the South, where the lack of continental barriers allows a free exchange of water between the major ocean basins. Hence, South Georgia po-tentially lies within a region susceptible to climatic changes before these can be felt further afield. In 2013 and 2014 a total of five GNSS stations were installed covering the area of the main island (approximately 170 x 50 km) with two of those being located close to the King Edward Point (KEP) Research Station and the GLOSS tide gauge (ID 187). Furthermore, precise levelling campaigns in 2013, 2014, 2017 and 2020 supported the analysis of local ground instabilities near the tide gauge. Through these activities the tide gauge datum within the Permanent Ser-vice for Mean Sea Level (PSMSL) has been established, which in turn, makes the derived KEP mean sea level (MSL) record highly valuable for long-term studies and satellite altimetry cali-brations. In this study, we will present the vertical land movement estimates from seven years of GNSS observations, five precise levelling campaigns, and will discuss their impact on the sea level record from the KEP tide gauge and nearby satellite altimetry sea surface heights. Our results confirm uplift all over South Georgia Island while the area at KEP and particularly the jetty with tide gauge are subsiding relative to the rest of the island. Using this information we correct the MSL record for the vertical land movements and investigate its signals together with those from nearby satellite altimetry tracks. [less ▲]

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See detailOutdoor STEAM integrated framework in elementary schools in Luxembourg using MathCityMap and GeoGebra 3D Calculator
Haas, Ben; Kreis, Yves UL; Lavicza, Zsolt

Scientific Conference (2020, December 15)

In elementary schools in Luxemburg, sciences and mathematics are generally taught in class based essentially on textbooks. However, the findings of multiple studies on understanding and applying skills in ... [more ▼]

In elementary schools in Luxemburg, sciences and mathematics are generally taught in class based essentially on textbooks. However, the findings of multiple studies on understanding and applying skills in STEAM (Science, Technology, Engineering, Arts and Mathematics) report that students need hands-on activities on real-world objects. Furthermore, in times of the COVID-19 pandemic, where numerous restrictions and risks dominate teaching inside the classroom, outdoor learning is safer and offers many opportunities. Hence, we created outdoor mathematical trails with a STEAM integrated approach for elementary schools using the free educational software MathCityMap and the dynamic mathematics software GeoGebra 3D. In these outdoor trails, students used a set of promising technologies, i.e. AR (Augmented Reality) or GPS, to support STEAM education. Based on results from our first study on outdoor mathematical trails in June 2020 (in review), we developed and evaluated a framework on outdoor STEAM integrated teaching. This framework was used for further outdoor task and trail creations in elementary schools, which we investigated by conducting semi-structured interviews with students and teachers. Hence, we will present how this framework was used in elementary schools to create outdoor mathematical trails and describe how it affected the students' learning. [less ▲]

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See detailUnderstanding through Experimentation: An Experimental Media Archaeological Approach to Early Twentieth-Century Home Movie Making
van der Heijden, Tim UL

Scientific Conference (2020, December 11)

This presentation addresses the question in what ways visual media have contributed to the construction of a specific view on twentieth-century century (family) life by means of an experimental media ... [more ▼]

This presentation addresses the question in what ways visual media have contributed to the construction of a specific view on twentieth-century century (family) life by means of an experimental media archaeological approach to early home movie making. Based on hands-on experiments with an original Ciné-Kodak 16mm film camera from 1930, it will be shown how filming one’s family was never truly a neutral practice of capturing everyday life. Rather, making a home movie should be regarded a highly “co-constructive” practice that includes various social, sensorial, technological and user-related dimensions. The presentation reflects work in progress from the research project “Doing Experimental Media Archaeology” (DEMA) of the Centre for Contemporary and Digital History (C2DH) of the University of Luxembourg: https://dema.uni.lu/. [less ▲]

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See detailRadial Urban Forms: Lessons from Land Profile Scaling Analyses & Spatial-Explicit Models
Caruso, Geoffrey UL

Scientific Conference (2020, November 25)

We definitely live in an increasingly urban World for half of humanity now lives in cities. Cities provide wealth but also negatively impact the environment and the health of citizens. Arguably the ... [more ▼]

We definitely live in an increasingly urban World for half of humanity now lives in cities. Cities provide wealth but also negatively impact the environment and the health of citizens. Arguably the benefits and costs of cities relate to both their size, in population terms, and their internal structure, in terms of the relative spatial arrangement of built-up and natural land. Much of urban research focusses on very large cities and urban cores. Yet 3 urban human out of 4 live in cities of less than 4 million inhabitants (according to the global GHSL dataset). Similarly, 3 out of 4 in a typical (European) city do not live in its core but beyond (using a 7-8km radius to define core for a city like London or Paris). To address urban sustainability issues and design adaptation policies, these 75% certainly count and, we can argue, also deserve specific attention because of the relative proximity between urban and non-urban (natural) use that smaller cities and suburban (non-core) areas may permit. In this respect, it is key to understand how the internal structure of cities, in particular the form and density of built-up areas and the interwoven green space emerge out of the core up until the fringe. It is also key to understand whether the form of cities, especially density gradients and the share of urbanised/non-urbanised land change with city size. In this talk we draw lessons from 2 research approaches to urban forms: one theoretical that uses spatial micro-economic simulations, and one empirical that uses spatially detailed land use datasets. Our theoretical simulations relate individual behaviour to urban forms while our empirics relate urban forms to city size. Both have in common a radial perspective to cities, i.e. explicitly or implicitly assuming that the accessibility trade-off to a given centre is a key determinant of locations and land uses. In both cases, we look at urbanisation and green space structures and at pollution exposure as an example of impact. [less ▲]

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See detailThe Helpers of Anne Frank - Recontextualising the Rescue of Dutch Jews
Zaagsma, Gerben UL

Scientific Conference (2020, November 24)

This paper sets out to recontextualise the memory of rescue as it pertains to Dutch Jewry during the Holocaust, by focusing on the helpers of Anne Frank and the other Jews in hiding in the Secret Annex ... [more ▼]

This paper sets out to recontextualise the memory of rescue as it pertains to Dutch Jewry during the Holocaust, by focusing on the helpers of Anne Frank and the other Jews in hiding in the Secret Annex. Much in the same way as perceptions of Jews in hiding have been decisively shaped by the story of Anne Frank, not only in the Dutch public imagination but arguably globally, so too the image of help, at least in the Western European and Anglosaxon world, has been considerably shaped by the story of two of the five helpers, Miep and Jan Gies, even if the support they provided to the onderduikers in the Secret Annex could ultimately not prevent discovery. The question of help, as well as the ultimate betrayal, of the onderduikers are linked to the broader question of the role of the Dutch population during the Holocaust. Within that context the Anne Frank story can and has indeed been used to provide both a stereotypical image of Gentile betrayal as well as an idealized and, arguably, romanticized image of Gentile help. In this paper I will trace the ways in which the image of help and rescue of Dutch Jews was shaped by the story of, especially, Miep Gies and analyse the ways in which her story resonated in the Netherlands as well as abroad. Important moments in this regard were the recognition of Miep Gies and the other helpers as Righteous Among the Nations in 1972, and the global publication of Miep Gies’ memoirs in 1987. I will frame this analysis within the broader historical context of 1) help provided to Jews in hiding in the Netherlands and the question of how representative the ‘helpers of Anne Frank’ were, and 2) the extent to which a focus on a few key individuals obscures the more complex reality of how rescue functioned in the first place. [less ▲]

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See detailExperimenter Effects in Children Using the Smileyometer Scale
Lehnert, Florence Kristin UL; Lallemand, Carine UL; Fischbach, Antoine UL et al

Scientific Conference (2020, November 19)

Researchers in the social sciences like human-computer interaction face novel challenges concerning the development of methods and tools for evaluating interactive technology with children. One of these ... [more ▼]

Researchers in the social sciences like human-computer interaction face novel challenges concerning the development of methods and tools for evaluating interactive technology with children. One of these challenges is related to the validity and reliability of user experience measurement tools. Scale designs, like the Smileyometer, have been proven to contain biases such as the tendency for children to rate almost every technology as great. This explorative paper discusses a possible effect of two experimenter styles on the distribution of 6-8 years old pupils' ratings (N= 73) to the Smileyometer. We administered the scale before and after a tablet-based assessment in two schools. Experimenter 1 employed a child-directed speech compared to a monotone speech of Experimenter 2. While brilliant (5 out of 5) was the most frequent answer option in all conditions, the mean scores were higher and associated with a lower variability across both conditions for Experimenter 2. We discuss a possible experimenter effect in the Smileyometer and implications for evaluating children’s user experiences. [less ▲]

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See detailOn socially constructed aspects of language (in)competence: Raising critical language awareness in the multilingual workplace
Lovrits, Veronika UL

Scientific Conference (2020, November 19)

In this theoretical contribution, I invite fellow researchers and managers to engage in a reflection on what is perceived as a competent language use at work. The objective is to open a broader discussion ... [more ▼]

In this theoretical contribution, I invite fellow researchers and managers to engage in a reflection on what is perceived as a competent language use at work. The objective is to open a broader discussion on seemingly obvious assumptions that may skew our understanding of everyday language practices. Critically reflected research review will point out to limitations of commonplace perspectives that mirror in managerial research and have implications for practice. Two questions will be discussed to raise critical awareness in the multilingual workplace: what linguistic norm sets the bar for the appropriateness of language use in the workplace, and whose interests does the language norm represent. This way, three problematic topics will be brought to attention: non acknowledged proliferation of linguistic concepts from education to workplace; questionable aptness of referring to standard language norm; and unacknowledged power plays fuelled by competing pragmatic needs of communicative partners. A reflection of power relations linked to norms and needs in the workplace may subsequently support a variety of practical managerial responses – ranging from a symbolic social acceptance of nonstandard language use to a decision to hire a professional linguistic service. [less ▲]

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See detailUpdate on NORMAN-SLE / SusDat for NORMAN-CWG-NTS Meeting (17 Nov 2020)
Schymanski, Emma UL

Scientific Conference (2020, November 17)

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See detailMultilingual education in early years in Luxembourg: mind ideologies!
Kirsch, Claudine UL

Scientific Conference (2020, November 14)

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See detailFormation à la pratique d’enseignement en temps de crise sanitaire: Conception, production et diffusion de vidéos pédagogiques à distance
Reuter, Robert UL; Reeff, Alain; Busana, Gilbert UL

Scientific Conference (2020, November 13)

Le Bachelor en Sciences de l’Education (BScE) de l’Université du Luxembourg propose une formation approfondie et exigeante alliant savoir académique et pratique. Ils sont formés pour enseigner dans tous ... [more ▼]

Le Bachelor en Sciences de l’Education (BScE) de l’Université du Luxembourg propose une formation approfondie et exigeante alliant savoir académique et pratique. Ils sont formés pour enseigner dans tous les cycles de l’école fondamentale, dans les classes de la voie de préparation et dans le contexte d’élèves à besoins éducatifs spécifiques au Luxembourg. Comme dans de nombreuses autres formations initiales des enseignants, le temps de terrain (ou stage) représente un moment clé de chaque semestre dans le BScE. Face à la crise sanitaire du COVID-19, ce dispositif de formation à la pratique pédagogique n’a pas pu être conservé. En effet, les écoles étaient fermées, les élèves étaient scolarisés à distance par leur enseignant. Nous avons donc dû rapidement innover et mettre en place des activités d’apprentissage alternatives qui correspondaient au mieux aux objectifs visés par les temps de terrain. Nous avons ainsi demandé à nos étudiants de concevoir et produire, en dyades, des vidéos pédagogiques à destination des écoles du pays. Le but était de permettre à nos étudiants de développer les compétences nécessaires pour réaliser de telles ressources d’apprentissage et de de les mettre à disposition des écoles via Internet. Nous allons décrire, analyser et évaluer le dispositif mis en place, ainsi que les vidéos qui ont été produite. Nous allons également discuter des éventuelles leçons apprises qui conduiront à des adaptations dans notre formation. [less ▲]

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See detailProfessional development to promote innovative language teaching: examples from multilingual Luxembourg
Kirsch, Claudine UL

Scientific Conference (2020, November 13)

While multilingual programmes have been implemented in early childhood education in several countries in Europe, professionals may still be unsure of how to promote multilingualism and deal with language ... [more ▼]

While multilingual programmes have been implemented in early childhood education in several countries in Europe, professionals may still be unsure of how to promote multilingualism and deal with language diversity. There is a need for professional development (PD) which can influence the practitioners’ attitudes, knowledge and skills, and the quality of their teaching (Egert et al., 2018; Peleman et al., 2017). This presentation begins with an outline of several theoretical models of PD and explains why integrated models that are collaborative, inquiry-based, and performance-based are the most effective in contributing to change. I will then present a PD used in Luxembourg to help early childhood practitioners develop and implement multilingual pedagogies. The model, which comprised training sessions, network meetings, and coaching, aimed to deepen the practitioners’ understanding of multilingualism and language learning, familiarize them with translanguaging (García & Reid, 2019) and enable them to implement language and literacy activities in Luxembourgish, French and children’s home languages (Kirsch et al. forthcoming). Finally, I provide insights into the professional learning of two preschool teachers. The PD, the experience of engaging in multilingual activities, and the reflection on teaching and learning, enabled the teachers to develop a positive stance to multilingual education, design productive leaning environments based on social-constructivist theories, and monitor language use to guarantee responsible translanguaging (Kirsch 2020). [less ▲]

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See detailThe use of augmented reality, digital and physical modelling in schooling at home in early childhood in Echternach
Haas, Ben; Kreis, Yves UL; Zsolt, Lavicza

Scientific Conference (2020, November 12)

During the confinement of COVID-19, many efforts were made by teachers in elementary school to switch from in-school to schooling at home (Kreis et al., 2020). The use of educational technology in early ... [more ▼]

During the confinement of COVID-19, many efforts were made by teachers in elementary school to switch from in-school to schooling at home (Kreis et al., 2020). The use of educational technology in early childhood (cycle 1), however, is not yet a common practice in elementary schools in Luxemburg. Participation in online video conferences or the use of educational technologies relied in early childhood in significant parts on the disponibility and skills of parents. Younger students were experiencing difficulties in following-up courses requests in schooling at home. From previous research (Haas et al., In Preparation), we designed a conceptual framework on parent assisted remote teaching. Hence, we used these findings to work with 12 early childhood students (ages 4-6), their teachers and parents in schooling at home. Based on the four basic principles of Dienes’s theory of mathematics in physical and digital modelling (Lieban, 2019), we created mathematical modelling tasks with TinkerCad. During two weeks, we collected data through chat responses, web meetings and observations. In this presentation, we will explain insights and how further tasks in schooling at home in early childhood could benefit from this experience. [less ▲]

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See detailHow do pupils experience Technology-Based Assessments? Implications for methodological approaches to measuring the User Experience based on two case studies in France and Luxembourg
Lehnert, Florence Kristin UL; Lallemand, Carine UL; Fischbach, Antoine UL et al

Scientific Conference (2020, November 12)

Technology-based assessments (TBAs) are widely used in the education field to examine whether the learning goals were achieved. To design fair and child-friendly TBAs that enable pupils to perform at ... [more ▼]

Technology-based assessments (TBAs) are widely used in the education field to examine whether the learning goals were achieved. To design fair and child-friendly TBAs that enable pupils to perform at their best (i.a. independent of individual differences in computer literacy), we must ensure reliable and valid data collection. By reducing Human-Computer Interaction issues, we provide the best possible assessment conditions and user experience (UX) with the TBA and reduce educational inequalities. Good UX is thus a prerequisite for better data validity. Building on a recent case study, we investigated how pupils perform TBAs in real-life settings. We addressed the context-dependent factors resulting from the observations that ultimately influence the UX. The first case study was conducted with pupils age 6 to 7 in three elementary schools in France (n=61) in collaboration with la direction de l’évaluation, de la prospective et de la performance (DEPP). The second case study was done with pupils age 12 to 16 in four secondary schools in Luxembourg (n=104) in collaboration with the Luxembourg Centre for Educational Testing (LUCET). This exploratory study focused on the collection of various qualitative datasets to identify factors that influence the interaction with the TBA. We also discuss the importance of teachers’ moderation style and mere system-related characteristics, such as audio protocols of the assessment data. This study contribution comprises design recommendations and implications for methodological approaches to measuring pupils’ user experience during TBAs. [less ▲]

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See detailGeoGebraTAO: Geometry Learning using a Dynamic Adaptive ICT-Enhanced Environment to Promote String Differentiation of Children's Individual Pathways
Dording, Carole; Max, Charles UL; Kreis, Yves UL et al

Scientific Conference (2020, November 12)

In our project, we investigate the scientific validity of a specific self-built Adaptive Learning Tool in the field of dynamic geometry with a particular focus on the individual learning pathways of a ... [more ▼]

In our project, we investigate the scientific validity of a specific self-built Adaptive Learning Tool in the field of dynamic geometry with a particular focus on the individual learning pathways of a highly diverse student population. 164 children of Luxembourg elementary schools, aged between 10 and 13 years, acted as test-group and explored elementary geometric concepts in a sequence of learning assignments, created with the dynamic mathematics system GeoGebra integrated into the computer-assisted testing framework TAO. They actively built new knowledge in an autonomous way and at their own pace with only minor support interventions of their teacher. Based on easily exploitable data, collected within a sequence of exploratory learning assignments, the GeoGebraTAO tool analyses the answers provided by the child and performs a diagnostic of the child’s competencies in geometry. With respect to this outcome, the tool manages to identify children struggling with geometry concepts and subsequently proposes a differentiated individual pathway through scaffolding and feedback practices. Short videoclips aim at helping the children to better understand any task in case of need and can be watched voluntarily. Furthermore, a spaced repetition feature is another highly useful component. Pre- and post-test results show that the test-group, working with GeoGebraTAO, and a parallel working control-group, following a traditional paper-and-pencil geometry course, increased their geometry skills and knowledge through the training program; the test-group performed even better in items related to dynamic geometry. In addition, a more precise analysis within clusters, based on similar performances in both pre- and post-tests and the child’s progress within GeoGebraTAO activities, provides evidence of some common ways of working with our dynamic geometry tool, leading to overall improvement at an individualized level. [less ▲]

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See detailStudents’ Personality Relates to Experienced Variability in State Academic Self-Concept
Hausen, Jennifer UL; Möller, Jens; Greiff, Samuel UL et al

Scientific Conference (2020, November 11)

Attaining a positive academic self-concept (ASC) is linked to many desirable educational outcomes. Research on which student attributes relate to the formation of ASC is therefore considered to be central ... [more ▼]

Attaining a positive academic self-concept (ASC) is linked to many desirable educational outcomes. Research on which student attributes relate to the formation of ASC is therefore considered to be central. Past research on the association between personality traits and ASC has taken an interindividual perspective, while the intraindividual perspective has been disregarded. The present research explored the relation between students’ Big Five traits and intraindividual variability in state general-school ASC in everyday school life for the first time using intensive longitudinal data. We drew on N=294 German ninth and tenth graders who completed a three-week e-diary and a previously presented 60-item Big Five questionnaire (BFI-2; Danner et al., 2016; Soto & John, 2017) assessing Open-Mindedness, Conscientiousness, Extraversion, Agreeableness, and Negative Emotionality as well as their respective subfacets (i.e., resulting in 15 subfacets). To assess state ASC, students completed three items after every single lesson across four different subjects (resulting in Mlessons = 21.12). We ran six mixed-effects location scale models: one specified with all five Big Five domains, and five (one for each Big Five domain) with the subfacets as predictors of intraindividual variability in state ASC. We found that Open-Mindedness, Conscientiousness, Extraversion, and Negative Emotionality as well as at least one subfacet of each Big Five trait were significant predictors of levels of state ASC independently of students’ gender and reasoning ability, and the narrower subfacets Organization (Conscientiousness) and Depression (Negative Emotionality) predicted variability in state ASC independently of students’ gender and reasoning ability. These findings thus provide first evidence that students’ ASC undergoes short-term fluctuations from school lesson to school lesson and that this intraindividual variability can be partly explained by students’ personality. Our results thus contribute to a more complete map of the formation of ASC and the role of personality therein. [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 detailThe health, well-being and life satisfaction of young people in Luxembourg before the COVID-19 pandemic and during deconfinement
Residori, Caroline UL; Schomaker, Léa UL; Samuel, Robin UL

Scientific Conference (2020, November 10)

Background: During 2020, most aspects of young people’s lives have been altered by the COVID-19 pandemic and the measures being implemented to contain it. Early studies on the effects of the COVID-19 ... [more ▼]

Background: During 2020, most aspects of young people’s lives have been altered by the COVID-19 pandemic and the measures being implemented to contain it. Early studies on the effects of the COVID-19 pandemic suggest that confinement (so-called “lockdowns”) affect health, well-being and life satisfaction. However, the current situation in many countries is not confinement but prolonged deconfinement with less strict but still considerable measures and recommendations. Objectives: The possible effects of this deconfinement on the health, well-being and life satisfaction of young people is the focus of this oral presentation, which is based on the YAC-Young Adults and COVID-19 study (see Residori et al., 2020). Methods: The study relies on data collected from a random sample of residents of Luxembourg for the Youth Survey Luxembourg in Mai-July 2019 (age-range: 16-29, n=2.800) and in July 2020 (age-range: 12-29, n=3768, preliminary data). The data was gathered via online survey and using the same items as the HBSC study (self-rated health, life satisfaction (Cantril ladder) and the WHO-5 Well-being Index) (Sozio et al., 2020). Results: The cross-sectional comparison of this representative data, explores the health, wellbeing and life satisfaction of young people in Luxembourg before and during the COVID-19 pandemic. The results are presented for the overall population and detailed by socio-demographic groups. For the 12-15-year-olds, the observed proportion reporting a low life satisfaction (<6) was, for example, 31.3% in 2020. This proportion has increased from 19.9% in 2019 to 25.5 % in 2020 for the 16-20-year-olds, from 23.9% to 35.3 % for the 21-25-year-olds and from 20.2% to 32.8% for the 26-29-year-olds. Conclusion: The presentation will conclude on a reflection of the links between the observed differences and the measures implemented to during deconfinement as well as the scientific and political relevance of the observed differences for Luxembourg and other countries. Literature: Residori, Caroline; Sozio, Maria E.; Schomaker, Lea; Samuel, Robin (2020): YAC – Young People and COVID-19. Preliminary Results of a Representative Survey of Adolescents and Young Adults in Luxembourg. University of Luxembourg: Esch-sur-Alzette Sozio, M., Procopio, A., & Samuel, R. (2020). Youth Survey Luxembourg – Technical Report 2019. Esch-sur-Alzette: University of Luxembourg. [less ▲]

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See detailDigitale Kommunikation im Alter – Erste Ergebnisse der CRISIS-Studie
Albert, Isabelle UL; Hoffmann, Martine; Murdock, Elke UL et al

Scientific Conference (2020, November 10)

In Folge der Kontaktbeschränkungen und Maßnahmen der sozialen Distanzierung zur Eindämmung der Corona Pandemie wurde vielfach von einem vermehrten Gebrauch digitaler Medien zur Aufrechterhaltung sozialer ... [more ▼]

In Folge der Kontaktbeschränkungen und Maßnahmen der sozialen Distanzierung zur Eindämmung der Corona Pandemie wurde vielfach von einem vermehrten Gebrauch digitaler Medien zur Aufrechterhaltung sozialer Kontakte berichtet. Die vorliegende Studie liefert erste Hinweise darauf, inwiefern sich das Kommunikationsverhalten älterer Menschen während der COVID-19 Krise verändert hat, wie der Gebrauch verschiedener Kommunikationsmittel mit der Reduktion von Einsamkeit und sozialer Isolation zusammenhängt und ob digitale Medien traditionelle Formen der Kommunikation verdrängen oder ergänzen. Im Juni 2020 wurden im Rahmen des vom FNR Luxemburg geförderten CRISIS-Projekts N = 611 in Privathaushalten lebende Personen im Alter zwischen 60 und 98 Jahren zu ihrem Erleben während der COVID-19 Krise befragt. Die Ergebnisse zeigen, dass das Telefon insgesamt zwar weiterhin das wichtigste Kommunikationsmittel älterer Menschen bleibt, jedoch nehmen digitale Medien insbesondere in der Gruppe der 60-69-jährigen einen wichtigen Stellenwert ein, um mit anderen in Kontakt zu bleiben. Dabei reduzierte ein gestiegener Gebrauch digitaler Medien (wie auch traditioneller Medien) das Gefühl, nicht genug Gesellschaft zu haben. Außerdem scheinen neue Arten der Kommunikation traditionelle Arten in unserer Zielgruppe nicht zu ersetzen, sondern sie ergänzen sich gegenseitig. Die Ergebnisse werden mit Bezug auf Maßnahmen zur Reduktion sozialer Isolation und Einsamkeit im Alter und im Kontext von COVID-19 diskutiert. [less ▲]

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See detailScanning of questionnaires as a tool to identify difficult questions - lessons learned
Heinz, Andreas UL; van Duin, Claire UL; Catunda, Carolina UL et al

Scientific Conference (2020, November 10)

Background: In 2018, the Luxembourg HBSC team scanned the questionnaires to make the data available faster and to avoid entry errors. Scanning has been shown to be suitable for identifying difficult ... [more ▼]

Background: In 2018, the Luxembourg HBSC team scanned the questionnaires to make the data available faster and to avoid entry errors. Scanning has been shown to be suitable for identifying difficult questions. Objective: The presentation shows which questions were difficult to answer and what the difficulty was. Method: The questionnaires were scanned by student assistants and the data was validated by them if the scanning programme did not detect any errors. If errors occurred (e.g. missing answers or multiple answers), then these questionnaires were checked by HBSC team members. This gave us a systematic overview of which questions were difficult to answer. Results 1. The data from 10000 questionnaires were entered in 6 weeks (half the time needed compared to manual entry in 2014). 2. The MVPA question was frequently the subject of multiple answers. This may indicate that these students use the answer scale as a counting aid. 3. Students who state that they have never smoked in their lives often skip the question about tobacco use in the last month. This behaviour can be explained by Grice's conversational maxims. 4. Behaviours indicating that the answers are not serious (crossed-out questions, crosses outside the boxes, fun answers to open questions) are rare. Conclusions: Scanning is an efficient way to enter many questionnaires in a short time and high quality. Furthermore, it can help to discover difficult questions and to find out what the difficulty is. [less ▲]

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See detailBeyond School Effects: Private Schooling, Segregation and Standardization of School Systems in Latin America
Ceron, Francisco UL

Scientific Conference (2020, November 07)

Introduction A considerable body of studies have shown that specific institutional arrangements in educational systems help in understanding cross-national differences in educational outcomes (Woessman ... [more ▼]

Introduction A considerable body of studies have shown that specific institutional arrangements in educational systems help in understanding cross-national differences in educational outcomes (Woessman 2003, Brunello and Checchi 2007, Bol and van de Werfhorst 2011, Bol et al 2014, Mijs 2016). The design of educational institutions may face policy trade-offs in the tasks of school systems that are served by them. Deregulation as privatization and school autonomy may enhance efficient sorting of students and then maximize learnings but at the cost of exacerbating social inequalities. A centralized education system may guarantee equality of educational opportunities, but it is not clear if it increases or hinder the overall performance level (Bol and van de Werfhorst 2011, Pedró et al 2015). This study is aimed to fill this gap, first, by departing from the widely supported assumption that the organization of educational systems affect, partly, the educational outcomes of students. Second, I focus on developing countries –Latin American countries- as we know less about the impact of institutions in educational outcomes in the region. Third, I attempt to address the following research question: what is the effect of the level of privatization increase achievement inequalities, given the level of standardization of the school systems in Latin American countries? Data and Methods I analyse data from the Tercer Estudio Regional Comparativo y Explicativo (TERCE), implemented in in year 2013 by UNESCO office in Santiago, Chile. TERCE is the most recent large-scale assessment that exclusively cover students and schools in Latin American countries. Fifteen countries participated: Argentina, Brazil, Chile, Colombia, Costa Rica, Dominican Republic, Ecuador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru and Uruguay. Following the comparative research body, I use two-level hierarchical model to account for the multilevel structure of the data, students nested in schools, with random school effects and country fixed effects, to identify variability in the educational institutions of interest, given the small number of countries. The dependent variable is performance in mathematics in 6th grade as it is the subject that is most clearly learned at schools (Coleman 1975, Bol et al 2014), and seems to be more sensitive to socioeconomic background than other subjects. The main predictor is socioeconomic status of student, and I control for several indicators related to learning home environment, and sociodemographic variables. At school level, I control for several organizational characteristics and social composition. Findings The main findings show that country-specific configurations of school systems are associated to difference in mathematics achievement. Differences between schools in performance are partly explained by differences at country level. In this regard, I have chosen two important dimensions of school systems, for the Latin American region: the level of standardization and privatization. These results confirm some recent findings that achievement inequality is larger in school systems with a great level of differentiation between schools, in which the stratification triggered by the private sector is one important indicator (Chmielewski and Reardon, 2016). In case of the level of standardization results show that is associated to a lesser degree of achievement inequality. However, the main finding points to persistent inequalities as much as private sector in school systems is bigger. Further, the models predict that these inequalities are not decreasing as the standardization level increases. In this respect, I also find support for a diminishing effect of policies that points to equalization of opportunities (Woessman 2003, Bol and van de Werfhorst 2011). The results suggest higher inequalities as the stratification induced by private school sector increases. These effects are still significant after adding school level controls, which suggest that over and above school processes, uneven between school sorting induces by private sector. [less ▲]

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See detailIWalk in Luxembourg: Jewish public history in forgotten places
Bronec, Jakub UL

Scientific Conference (2020, November 06)

The contribution will introduce the process of designing two IWalk tours with bachelor students in Luxembourg. The presentation will contain the digital source criticism and new perspectives of digital ... [more ▼]

The contribution will introduce the process of designing two IWalk tours with bachelor students in Luxembourg. The presentation will contain the digital source criticism and new perspectives of digital hermeneutics related to themes of individual stops. The students were divided into two working groups, with each group assigned to a different area. Group A was in charge of designing a virtual tour in Luxembourg City and group B created one for the town of Esch-sur-Alzette. The participants took pictures of current buildings and locations associated with Jewish war history and compared them with original historical photos taken before and during the war. The students were encouraged to reflect on how the appearance and function of certain buildings had changed over time. Besides critical analysis of all pros and cons, I will introduce MAXQDA, a tool for qualitative data analysis to be an invaluable assistant for easier pre-selection of interviews. From a methodological perspective, we were able to judge the relevance of interviews for our work. Students also learned to link different text passages to each other as well as to other documents, educational websites, images or geographical locations. When several students are working with one data set, it is important to create a clear system of memos, codes and intercoder agreements. For a comparative analysis, students used a unified thematic coding tree they had created themselves. The use of a common code book tree enables them to find thematic intersections in their work. The contribution will also demonstrate the purpose of pre-question and post-questions, which make users consider the content of each IWalk stop. [less ▲]

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See detailCovid-19 in Portuguese educational scenario: actions, responses and reflections
de Albuquerque Trigo, Maiza UL

Scientific Conference (2020, November 06)

On March 13th, the Portuguese government declared that children were going home, and classes would resume after Easter in an online/distance mode. Children were sent home and the system panicked. As a ... [more ▼]

On March 13th, the Portuguese government declared that children were going home, and classes would resume after Easter in an online/distance mode. Children were sent home and the system panicked. As a majority of teachers are over 45 years old, trainings on online platforms were made available, as well as the platforms to be used. In the meantime, the government announced a plan to broadcast via television general lessons starting from April 20th (two 40-minute lessons per day per school year grouping, for primary and elementary school classes only). Secondary classes were mainly online, but 11th and 12th graders went back to school for a few weeks to prepare themselves to the national exams. As the school year came to an end, new guidelines are being outlined and, at this time, each school has to develop their own return and contingency plans (accordingly to the Health Authorities guidelines). This presentation will discuss the responses in Portugal with a reflective focus on education actions and effects. [less ▲]

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See detailAnalysing transnational Events through Web archives
Schafer, Valerie UL

Scientific Conference (2020, November 04)

As a co-PI of the WARCnet project, programme chair of this second WARCnet meeting and head of WG2 dedicated to "Analysing transnational Events", Valérie Schafer will give an overview of the challenges ... [more ▼]

As a co-PI of the WARCnet project, programme chair of this second WARCnet meeting and head of WG2 dedicated to "Analysing transnational Events", Valérie Schafer will give an overview of the challenges, issues, achievements, results, case studies, next steps of WG2 since the launch of the WARCnet project. [less ▲]

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See detaileCoBus: Smart and sustainable public transport in Luxembourg
Viti, Francesco UL

Scientific Conference (2020, November)

Detailed reference viewed: 56 (1 UL)
See detailSTREAMS: A supporting tool for shared mobility services
Giorgione, Giulio UL; Viti, Francesco UL

Scientific Conference (2020, November)

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See detailIs there a bilingual advantage in mathematics?
Martini, Sophie Frédérique UL; Keller, Ulrich UL; Ugen, Sonja UL

Scientific Conference (2020, November)

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See detailInequalities in teacher reports on students’ inclusion at school
Zurbriggen, Carmen UL; Nusser, Lena; Schmitt, Monja

Scientific Conference (2020, November)

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See detailHPC Multi-physics Biomass Furnace simulations as a Service
Besseron, Xavier UL; Rusche, Henrik; Peters, Bernhard UL et al

Scientific Conference (2020, November)

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

Scientific Conference (2020, October 29)

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

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

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See detailDeliberative constitution-making in Luxembourg
Burks, Deven UL; Kies, Raphaël UL

Scientific Conference (2020, October 22)

Luxembourg is a small constitutional monarchy and parliamentary democracy. Since its 1868 ratification, the Constitution of Luxembourg has been amended 35 times, so the document resembles more and more a ... [more ▼]

Luxembourg is a small constitutional monarchy and parliamentary democracy. Since its 1868 ratification, the Constitution of Luxembourg has been amended 35 times, so the document resembles more and more a patchwork quilt of basic institutions. Yet the past twenty years have seen a consensus amongst Luxembourg’s constitutional players on the need for modernization, motivated by the desire for a more coherent constitution. Article 114 vests the Chamber of Deputies with the power to initiate and to approve constitutional amendments in a two-step process. This has several consequences for deliberation. First, it is largely restricted to political elites because formal amendment powers rest solely with the Chamber. Second, there is little to no empowered maxi-public deliberation unless the Government supports a citizen consultation. Following the 2013 parliamentary elections, the new Government planned a two-part referendum on constitutional reform in summer 2015 and in winter 2015. The first referendum was intended to seek popular input on four proposals which voters rejected by large margins, and the second referendum was later scrapped. Nevertheless, this reform process has seen some participatory and deliberative experiments. For the purposes of the present COST Action, three events are of interest. First, charged by the Chamber of Deputies, the UL’s Parliamentary Studies Research Chair at organized in May 2014 CIVILEX, a citizens’ forum modelled along the lines of a 21st century Town Meeting to discuss each of the four referendum questions. Researchers found that group discussion sometimes produced significant shifts in opinion between the pre- and post-deliberation questionnaires. Furthermore, once experts had cleared up certain misunderstandings, citizens ably discussed the referendum proposals. Despite these largely positive experiences, this deliberative experiment remained an isolated experiment and was not renewed during the campaign leading up to the June 2015 referendum. Second, given the first referendum results, the Chamber made a renewed effort in 2015 to involve citizens in the constitutional reform process, so it collected proposals via a new web portal - www.ärvirschléi.lu (Your Recommendation) – and subsequently held a public hearing with those who had initiated proposals. The process yielded some participatory and deliberative outcomes, including the elaboration of several constitutional amendments. For instance, Chamber members reached consensus on strengthening the rights of children and of animals compared to their original text. Nevertheless, the webportal was not developed as an online deliberative forum and saw limited, self-selected participation. Consequently, though this was the only concrete involvement of citizens in the constitutional reform, it was the least deliberative of the three exercises. Third, since the Government had still planned to call a second referendum to vote on the constitutional reform as a whole, the Chamber again tasked the Chair with gauging public opinion. So, in July 2016, the Chaire organized CONSTITULUX, a new citizens’ forum to discuss the entire draft constitution. Citizens i.) raised pertinent questions, ii.) identified short- and long-term concerns and iii.) suggested improvements to the draft articles. One striking output was that participants were more supportive of the proposed constitutional reform. Like CIVILEX, it generated little concrete action from the Government. Moreover, the incidental and experimental nature of these events again meant that there was little maxi-public engagement. Following the draft constitution’s abandonment in November 2019, it remains to be seen what the future holds for deliberative democracy and constitution-making in Luxembourg. [less ▲]

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See detailTESTING ENVIRONMENTS FOR LUNAR SURFACE PERCEPTION SYSTEMS; COMBINING INDOOR FACILITIES, VIRTUAL ENVIRONMENTS AND ANALOGUE FIELD TESTS.
Ludivig, Philippe UL; Olivares Mendez, Miguel Angel UL; Calzada Diaz, Abigail et al

Scientific Conference (2020, October 21)

This paper describes the different approaches which can be used to test vision systems for operations on robotic lunar surface missions. We investigate validating systems in virtual environments, lab ... [more ▼]

This paper describes the different approaches which can be used to test vision systems for operations on robotic lunar surface missions. We investigate validating systems in virtual environments, lab environments and analogue outdoor environments and demonstrate that a combination of all three approach-es is needed to sufficiently test systems for the lunar surface. [less ▲]

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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 detailTraffic Simulator for Multibeam Satellite Communication Systems
Al-Hraishawi, Hayder UL; Lagunas, Eva UL; Chatzinotas, Symeon UL

Scientific Conference (2020, October 20)

Assume that a multibeam satellite communication system is designed from scratch to serve a particular area with maximal resource utilization and to satisfactorily accommodate the expected traffic demand ... [more ▼]

Assume that a multibeam satellite communication system is designed from scratch to serve a particular area with maximal resource utilization and to satisfactorily accommodate the expected traffic demand. The main design challenge here is setting optimal system parameters such as number of serving beams, beam directions and sizes, and transmit power. This paper aims at developing a tool, multibeam satellite traffic simulator, that helps addressing these fundamental challenges, and more importantly, provides an understanding to the spatial-temporal traffic pattern of satellite networks in large-scale environments. Specifically, traffic demand distribution is investigated by processing credible datasets included three major input categories of information: (i) population distribution for broadband Fixed Satellite Services (FSS), (ii) aeronautical satellite communications, and (iii) vessel distribution for maritime services. This traffic simulator combines this three-dimensional information in addition to time, locations of terminals, and traffic demand. Moreover, realistic satellite beam patterns have been considered in this work, and thus, an algorithm has been proposed to delimit the coverage boundaries of each satellite beam, and then compute the heterogeneous traffic demand at the footprint of each beam. Furthermore, another algorithm has been developed to capture the inherent attributes of satellite channels and the effects of multibeam interference. Data-driven modeling for satellite traffic is crucial nowadays to design innovative communication systems, e.g. precoding and beam hopping, and to devise efficient resource management algorithms. [less ▲]

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See detailDigital Detective Work: Connecting Cheminformatics, Mass Spectrometry and our Environment (analytica Conference)
Schymanski, Emma UL; Bolton, Evan

Scientific Conference (2020, October 20)

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See detailWELDING COPPER TO ALUMINIUM WITH GREEN LASER WAVELENGTH OF 515 NM
Mathivanan, Karthik UL; Plapper, Peter UL

Scientific Conference (2020, October 19)

Joining copper and aluminum sheets is difficult because of brittle intermetallic phases (IMP) formed in the joint, which results in reduced performance. The traditional approach to overcome this issue is ... [more ▼]

Joining copper and aluminum sheets is difficult because of brittle intermetallic phases (IMP) formed in the joint, which results in reduced performance. The traditional approach to overcome this issue is to irradiate the laser beam from Aluminum (Al) to control the weld depth and mixing of Cu in Al. The laser welding approach from the copper side (Cu on top) to Al is very sparse in the literature. In this paper, the welding approach from copper (top sheet) to aluminum is studied with green laser (515 nm) due to improved absorption at this wavelength. The objective of irradiating the laser beam from the copper side (Cu on top) is to exploit the higher solubility of Al in Cu (about 18%), which is significantly higher than Cu in Al. Therefore more Cu and Al can be melted and mixed in the joint for copper sheet placed on the top. From the tensile shear test, a strong joint is obtained with a fracture on the heat-affected zone (HAZ) of Al. Detailed microstructure and composition of Al and Cu in the joint is performed by Energy-dispersive X-ray spectroscopy (EDS) to investigate the composition in the joint. The EDS analysis indicates that a large amount of beneficial Cu solid solution and Al-rich phases is formed in the joint. The detrimental phases are intermixed in between the ductile phase composition i.e Al-rich and Cu solid solution. Therefore the effect of detrimental intermetallic phases is mitigated by intermixing with large ductile phases. With this paper, the fusion welding approach for joining Cu and Al system with a significant level of Cu and Al melting is shown. [less ▲]

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See detailLowering the obstacles for SMEs to adopt multi-physics biomass furnace simulations by providing a cloud based solution
Rusche, Henrik; Peters, Bernhard UL; Besseron, Xavier UL et al

Scientific Conference (2020, October 14)

Detailed reference viewed: 59 (0 UL)
See detailCollaboration with parents and multiliteracy in early childhood education
Kirsch, Claudine UL; Neumann, Sascha; Aleksic, Gabrijela UL et al

Scientific Conference (2020, October 09)

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See detailThe Future of Money in the Digital Age
Brand, Claus; Danescu, Elena UL

Scientific Conference (2020, October 09)

Research Seminar “The Future of Money in the Digital Age" (Blockchain and Cryptocurrencies. Digital Currencies vs Sovereign Currencies: Potential Implications for the Economic and Monetary Union.)

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See detailPresentación del paquete eph
Rosati, German; Kozlowski, Diego UL; Shokida, Natsumi Solange UL et al

Scientific Conference (2020, October 09)

Working with data produced by public sources often encounters several problems: one of the most common is the lack of continuity in the publication of databases. In this regard, the Permanent Household ... [more ▼]

Working with data produced by public sources often encounters several problems: one of the most common is the lack of continuity in the publication of databases. In this regard, the Permanent Household Survey -EPH- of the National Institute of Statistics and Censuses (INDEC) in Argentina is an exception. In fact, this survey has published user databases with information since 1974. However, this has been done in a "non-replicable" way: from changes in the formats of its publication (dbase, .txt, .xls, .sav, etc.) to renaming some variables and recoding their categories, which makes them impractical for continuous use and processing. The lack of an API for the dissemination of information produced by INDEC generates a limit to the information processing capabilities, reducing the users to i) thematic experts with knowledge of how to access sources and ii) media that access information already processed in the form of press releases. This limits the potential value of the enormous work done by the institute, by discouraging its use by users with limited knowledge of the sources, but with data processing capabilities, such as the R community. In turn, certain key indicators presented by the EPH have methodological annexes, but no public implementations that allow the public to make use of the methodology outside the reports prepared by the institute. In this context, the eph package aims to facilitate the work of those users of the Permanent Household Survey - INDEC who wish to process data from it using the programming language R. The library has the following functionalities: i) a unified syntax for downloading, tagging and building datasets with comparable cross-sectional information ii) Implementation of indicator calculation (poverty) using the official methodology Some of its functions are: get_microdata(): Downloads the microdata bases, organize_panels(): Allows to build a panel data pool of the continuous EPH surveys, organize_cno(): Classifies occupations according to the CNO 2001 organize_caes(): Classifies economic activities according to CAES Mercosur 1.0 and CAES Mercosur organize_labels(): Label the bases following the last design map_agglomerates(): Indicator map by agglomerate The package also has other datasets that can be useful for working with the EPH: some dictionaries that contain the coding of geographic variables (such as regions or clusters) or the geographic position (centroids) of the clusters where the survey is conducted. [less ▲]

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See detailActive Popularity Learning with Cache Hit Ratio Guarantees using a Matrix Completion Committee
Bommaraveni, Srikanth UL; Vu, Thang Xuan UL; Chatzinotas, Symeon UL et al

Scientific Conference (2020, October 08)

Edge caching is a promising technology to facethe stringent latency requirements and back-haul trafficoverloading in 5G wireless networks. However, acquiringthe contents and modeling the optimal cache ... [more ▼]

Edge caching is a promising technology to facethe stringent latency requirements and back-haul trafficoverloading in 5G wireless networks. However, acquiringthe contents and modeling the optimal cache strategy is achallenging task. In this work, we use an active learningapproach to learn the content popularities since it allowsthe system to leverage the trade-off between explorationand exploitation. Exploration refers to caching new fileswhereas exploitation use known files to cache, to achievea good cache hit ratio. In this paper, we mainly focus tolearn popularities as fast as possible while guaranteeing anoperational cache hit ratio constraint. The effectiveness ofproposed learning and caching policies are demonstratedvia simulation results as a function of variance, cache hitratio and used storage. [less ▲]

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See detailEpistemic communities in building EMU: Pierre Werner, Robert Triffin and Jean Monnet in European monetary cooperation.
Danescu, Elena UL

Scientific Conference (2020, October 07)

On 8 October 1970 in Luxembourg, Pierre Werner officially presented the plan by stages for an economic and monetary union (EMU) in the European Community. This document was the result of seven months of ... [more ▼]

On 8 October 1970 in Luxembourg, Pierre Werner officially presented the plan by stages for an economic and monetary union (EMU) in the European Community. This document was the result of seven months of discussions by a group of experts from the six Member States, chaired by the Luxembourg Prime Minister and Finance Minister. The Werner Report set out the broad lines, principles and stages of an EMU based on the principle of irreversibility and an approach rooted in perfect symmetry between the economic and monetary aspects, with political union as the ultimate objective. It provided for the creation of a “centre of decision for economic policy” that would be “politically responsible to a European Parliament” elected by universal suffrage, and a “Community system for the central banks”. It introduced the notion of strong macroeconomic governance, requiring the coordination of budgetary and monetary policies, and full financial integration. It also envisaged the involvement of the “social partners” (employers and unions) in defining economic and monetary policy, since the social dimension was seen as an intrinsic part of EMU. Although it was ultimately not implemented, the Werner Report led to the creation of the European Monetary Cooperation Fund (EMCF) in 1973 in Luxembourg – the embryo of the future European Central Bank. This institutional architecture was inspired by the reflections on a European reserve fund initiated in 1948 by Robert Triffin and subsequently developed through his discussions with Jean Monnet and Pierre Werner. The three were committed to the European cause and shared the same vision of EMU, rooted in “perfect parallelism”, democratic strength and a social dimension. Robert Triffin and Jean Monnet, together with other members of Monnet’s Action Committee for a United States of Europe, intended to work on the strategy devised by Pierre Werner to build a political consensus around the report. [less ▲]

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See detailResource Allocation for UAV Relay-Assisted IoT Communication Networks
Tran Dinh, Hieu UL; Nguyen, van Dinh UL; Gautam, Sumit UL et al

Scientific Conference (2020, October 06)

This work studies unmanned aerial vehicle (UAV) relay-assisted Internet of Things (IoT) communication networks in which a UAV is deployed as an aerial base station (BS) to collect time-constrained data ... [more ▼]

This work studies unmanned aerial vehicle (UAV) relay-assisted Internet of Things (IoT) communication networks in which a UAV is deployed as an aerial base station (BS) to collect time-constrained data from IoT devices and transfer information to a ground gateway (GW). In this context, we jointly optimize the allocated bandwidth, transmission power, as well as the UAV trajectory to maximize the total system throughput while satisfying the user’s latency requirement and the UAV’s limited storage capacity. The formulated problem is strongly nonconvex which is very challenging to solve optimally. Towards an appealing solution, we first introduce new variables to convert the original problem into a computationally tractable form, and then develop an iterative algorithm for its solution by leveraging the inner approximation method. Numerical results are given to show [less ▲]

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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 ▲]

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See detailZwischen Gehege und Idylle: Durs Grünbeins "Heimat"
Kohns, Oliver UL

Scientific Conference (2020, October)

Detailed reference viewed: 58 (1 UL)
See detailB/Ordering-Prozesse als Bordertexturen
Wille, Christian UL

Scientific Conference (2020, October)

Angesichts jüngster Re-B/Ordering-Tendenzen (Grenzkontrollen an EU-Binnengrenzen, Euroskeptizismus, Nationalismen, Populismus, komplexe Migrationsdynamiken) ist die Grenzforschung zunehmend stärker ... [more ▼]

Angesichts jüngster Re-B/Ordering-Tendenzen (Grenzkontrollen an EU-Binnengrenzen, Euroskeptizismus, Nationalismen, Populismus, komplexe Migrationsdynamiken) ist die Grenzforschung zunehmend stärker herausgefordert, was sich auch oder vor allem in einer bewegten theoretisch-konzeptionellen Debatte widerspiegelt. Sie hat in den letzten Jahrzehnten eine kaum überschaubare Reihe an Ansätzen und Begriffen hervorgebracht, die inspiriert vom practice turn die Grenze als soziale Praxis in den Mittelpunkt stellen. Der in das Panel einführende Beitrag zeichnet diese Entwicklung nach und stellt darauf aufbauend den Ansatz der Bordertexturen näher vor. Dafür werden im ersten Teil drei analytische Trends der aktuellen Grenzforschung idealtypisch unterschieden. Sie stehen dabei für spezifische Schwerpunktsetzungen in der Beschreibung und Analyse von Grenzen: (1) Zunächst wird die Hinwendung zu Grenzen als soziale Produktionen vorgestellt, die sich an Prozessen ihrer (De-)Stabilisierung festmachen lässt und in (diskursiven) Praktiken manifest wird. Daran anschließend wird (2) eine geweitete Auffassung solcher Prozesse herausgearbeitet, die für die Vielheit der daran beteiligten Aspekte sensibilisiert und einen multiplen Zugriff auf Grenz(de)stabilisierungen einfordert. Schließlich wird (3) die Tendenz zu komplexeren Betrachtungen ausgeführt, die Grenz(de)stabilisierungen als Effekte von dynamischen Formationen verstehen. Im zweiten Teil des Vortrags wird der kulturwissenschaftlich orientierte Ansatz der Bordertexturen vorgestellt, der die für B/Ordering-Prozesse wirksamen Formationen von Wissen, Diskursen, Tätigkeiten, Objekten und Körpern als Texturen fasst. Der Texturbegriff soll die komplexe Verflochtenheit der genannten Konstituenten betonen, eine ‚dichte Beschreibung‘ von Grenz(de)stabilisierungen befördern und in der Grenzforschung für die symbolisch-ästhetische Dimension sensibilisieren. Bordertexturen stehen dabei für komplexe Formationen der Grenz(de)stabilisierung, die rhizomartig strukturiert sind, auf ein multiskalares und azentrisches Geflecht verweisen und ästhetische Verarbeitungen ebenso einschließen wie alltagskulturelle Praktiken. Die Einführung des Ansatzes soll zu den Panelvorträgen hinführen, welche die theoretisch-konzeptionellen Überlegungen an unterschiedliche Gegenstandsbereiche anlegen und diskutieren. [less ▲]

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See detailUsing word embeddings to explore the Aboriginality discourse in a corpus of Australian Aboriginal autobiographies
Kamlovskaya, Ekaterina UL; Schommer, Christoph UL

Scientific Conference (2020, September 29)

This submission presents intermediate results of the PhD project analysing discourses in a corpus of Australian Aboriginal autobiographies with word embedding modelling.

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See detailIdentität im Spannungsfeld der Migrationsbewegung
Murdock, Elke UL

Scientific Conference (2020, September 21)

Die Rahmenbedingungen bei der Migration von deutschen Staatsangehöriger können – v. a. im Vergleich zu den meisten Migrantengruppen, die in der Forschung betrachtet werden – als privilegiert und günstig ... [more ▼]

Die Rahmenbedingungen bei der Migration von deutschen Staatsangehöriger können – v. a. im Vergleich zu den meisten Migrantengruppen, die in der Forschung betrachtet werden – als privilegiert und günstig beschrieben werden. Die deutsche Staatsangehörigkeit garantiert zum Beispiel einen leichten Zugang zu den meisten Ländern der Welt (Visa-Germany 2020). Zudem ist die Entscheidung zur Ausreise meist freiwillig, auf Basis ganz unterschiedlicher Beweggründe getroffen und die Möglichkeit zur Rückreise zumeist auch gegeben. Selbst wenn „Deutsch sein“ für die Auswanderer kein identitätsbestimmendes Merkmal war, werden sie im Ausland über die Kategorie „Deutsch“ wahrgenommen. Auf der einen Seite wird also über diese kategoriale Zuschreibung von außen eine Auseinandersetzung mit eignen Herkunftsland angeregt, auf der anderen Seite werden auch erst in der Kulturkontakterfahrung, wenn Selbstverständlichkeiten im alltäglichen Leben nicht mehr greifen, eigene Vorstellungen, Erwartungen und Werte bewusst und können reflektiert werden. Es gibt interindividuelle Unterschiede in Bezug auf die Bereitschaft sich mit solchen Unterschieden auseinanderzusetzen, einen Perspektivenwechsel einzunehmen und den eigenen Standpunkt zu hinterfragen (Tadmor und Tetlock, 2006). Die Bewertung dieser Erfahrung als bereichernd oder belastend ist ebenfalls sehr unterschiedlich. Die Frage der Konsequenzen der Mobilitätserfahrung für die eigene Identität und das Gefühl der Zugehörigkeit zu Deutschland bzw. dem Gastland lässt sich mit Hilfe der „German Emigration and Remigration Panel Study“ (GERPS) empirisch untersuchen. Die Determinanten dieses Zugehörigkeitsgefühls sowohl zum Gastland als auch zum Heimatland sollen im Verlaufe der Mobilitätserfahrung näher beleuchtet werden. Erste Resultate der Auswertung der ersten Welle zeigen, dass etwa die Hälfte der Auswanderer sich mit ihrem Auswanderungsland verbunden fühlen, wobei die Bleibeperspektive ein wichtiger Prädiktor ist. Ebenso wie der Migrationsprozess selbst, wird auch die Identitätsbildung als lebenslanger, dynamischer, unabgeschlossener und mehrdimensionaler Prozess verstanden. Aufbauend auf dieser Annahme und dem Akkulturationsrahmenmodell von Arends-Tóth und van de Vijver (2006) wird ein theoretisches Modell vorgestellt, mit Hilfe dessen Identität im Spannungsfeld der Migration untersucht werden kann. [less ▲]

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See detailMeasuring the Environmental Exposome (ISES2020)
Schymanski, Emma UL

Scientific Conference (2020, September 21)

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See detailPractical Use Cases for Ethernet Redundancy
Pannell, Don; Navet, Nicolas UL

Scientific Conference (2020, September 17)

Autonomous driving requires safety considerations and the need of “fail operational” requires redundancy. In the networking portion of a car, this may mean separate networks, possibly of different ... [more ▼]

Autonomous driving requires safety considerations and the need of “fail operational” requires redundancy. In the networking portion of a car, this may mean separate networks, possibly of different technologies. Or it could mean a network topology and technology that supports scalable redundancy, like Ethernet TSN. This presentation focuses on IEEE 802.1CB-2017, which is the TSN standard that supports data redundancy through the network. Various network topologies are examined. The relative costs of adding TSN redundancy for these topologies (including some, or all of, the end-stations/ECUs & bridges) are examined for various bandwidth utilizations, along with the expected packet loss. Each topology and bandwidth will be modeled under various bit-rate error values with the results discussed. This presentation aims at providing a clear understanding of the TSN standards that support redundancy, and an understanding of the cost/benefit tradeoffs so proper engineering decisions can be made and proper expectations set. [less ▲]

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See detailUrban repair networks: the City of Luxembourg and Esch-Sur-Alzette
Hoppenheit, Thomas UL

Scientific Conference (2020, September 17)

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See detailSchadstoffen auf der Spur mit Umweltcheminformatik
Schymanski, Emma UL

Scientific Conference (2020, September 17)

Detailed reference viewed: 44 (0 UL)
See detailFIXING THE TELEPHONE Communicating through the wired dispositives of a large technological system
Mossop, Rebecca UL

Scientific Conference (2020, September 17)

Detailed reference viewed: 34 (1 UL)
Peer Reviewed
See detailScaling of urban heat island & NO2 with urban population: a meta-analysis
Wei, Yufei UL; Caruso, Geoffrey UL; Lemoy, Rémi

Scientific Conference (2020, September 16)

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See detailTowards Computer-Aided, Iterative TSN-and Ethernet-based E/E Architecture Design
Creighton, Oliver; Navet, Nicolas UL; Keller, Patrick UL et al

Scientific Conference (2020, September 16)

In this presentation we would like to propose a novel approach towards studying and simulating candidate designs of next generation Ethernet architectures at established OEMs that intend to employ 100BASE ... [more ▼]

In this presentation we would like to propose a novel approach towards studying and simulating candidate designs of next generation Ethernet architectures at established OEMs that intend to employ 100BASE-T1, 1000BASE-T1 and, for increased flexibility and lower cost, 10BASE-T1S. Typical design goals of next generation architectures are future extensibility and cost optimization of the lowest-end. We propose to introduce guidance to an otherwise standard Monte-Carlo simulation by providing certain fixed points (e.g., mandated connections of ECUs to certain bridges, complete re-use of ECUs) and “hot spots” in the topology (e.g., ECUs with the highest variability pressure) that are known in advance from BMW’s experience with their vehicles in the field. Several important practical considerations must be integrated in the generation of candidate architectures: - Topological constraints: ECU proximity to sensors, daisy chain connections between ECUs to minimize cable length, number of switch ports in a certain ECU, etc. - Security and reliability requirements: segregation between mixed-criticality streams, proxy ECUs, and redundant paths. Our position statement explores the ability of algorithmic tools to synthesize Ethernet-based architectures based on a minimal fixed core TSN topology, design goals, design constraints, assumptions about next generation applications and data from past projects (capturing part of the OEM domain knowledge). [less ▲]

Detailed reference viewed: 118 (4 UL)
See detailGoverning Health in the European Semester: Towards the Economy of Wellbeing?
Muñoz, Susana UL

Scientific Conference (2020, September 11)

Health is a key component of the Economy of Wellbeing, the new horizontal approach to political decision-making and governance adopted by the Council of the European Union on 24 October 2019. Building on ... [more ▼]

Health is a key component of the Economy of Wellbeing, the new horizontal approach to political decision-making and governance adopted by the Council of the European Union on 24 October 2019. Building on the principles of the European Pillar of Social Rights and on the Health in All Policies and One Health approaches, it seeks to strengthen the role of employment, social, health and education policies within the European Semester. Nevertheless, “wellbeing” acquires a new resonance for the post COVID-19 “Economy of Recovery”. Against this backdrop, this paper aims to provide a critical review of the effectiveness of the European Semester as a governance tool for the “wellbeing” policies from the perspective of EU law and policy- making and enforcement. It also examines future prospects in the light of the multiple impacts of the current health and socioeconomic crises. [less ▲]

Detailed reference viewed: 63 (2 UL)
See detailDeliberative constitutionalism, popular sovereignty and alternative forms of government
Burks, Deven UL

Scientific Conference (2020, September 09)

Although deliberative democratic theory has traditionally positioned itself as a complement or corrective to representative bodies making ordinary law, it has recently expanded to the field of ... [more ▼]

Although deliberative democratic theory has traditionally positioned itself as a complement or corrective to representative bodies making ordinary law, it has recently expanded to the field of constitution-making and bodies formulating higher law. Yet this ‘deliberative constitutionalism’ has yet to confront two difficulties. First, ‘constitution- making’ is ambiguous between the process of drafting a constitution (‘making’), and the drafted system of institutions for collective action (‘constitution’). Thus far, scholarly attention has been squarely on the former, meaning that there is at best only a sketchy picture of a properly deliberative constitutional regime as an alternative to existing representative democratic constitutional regimes (see Parkinson 2016). Second, and as a direct consequence thereof, deliberative constitutionalists have not explored which alternative forms of government might be warranted by different deliberative constitutional regimes. In this paper, I tackle both these difficulties by modelling four different deliberative constitutional regimes – ‘deliberative containment’, ‘deliberative co-articulation’, ‘deliberative potential’, ‘deliberative ‘irritant’ (inspired by Loughlin and Walker 2007) – and by illustrating their characteristic institutional mechanisms, including such alternative institutions as one-shot or continuous sortition bodies, deliberative polls and maxi-public combined with varieties of plural voting, amongst others. In this way, I propose a clearer systemic vision of not just what alternative forms of government may be found under different deliberative constitutional regimes but which such regimes, with their expressed basic values, are liable to justify those alternative institutions. [less ▲]

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See detailDigitizing of Research and Teaching
Plapper, Peter UL

Scientific Conference (2020, September 05)

The current Covid-19 crisis impacts all manufacturing areas and new processes are sought. This presentation provides the audience with three examples related to assembly work instructions, logistics data ... [more ▼]

The current Covid-19 crisis impacts all manufacturing areas and new processes are sought. This presentation provides the audience with three examples related to assembly work instructions, logistics data handling and manufacturing education, for which innovative ways to obtain access to context sensitive data based on digital tools are investigated. Augmented Reality (AR) and Virtual Reality (VR) facilitate access to relevant manufacturing information. In order to provide logistic warehouse workers with immediate access to shipping documents, to avoid paper print-outs, and to eliminate error-prone typing of information, critical information should be handled digitally and hands-free. To support logistic workers to efficiently document, register and trace receipt, storage or delivery of goods, the presented solution is built on hands-free digital tools with AR technology in commercially available smart glasses. Similarly, workers who execute complex assembly operations frequently require either assistance or support for the next assembly step. Depending on the context, relevant assembly process information is automatically displayed together with the environment in the AR smart glass. Thus, the operator is supported by the presented hands-free-tool to complete the next challenging tasks. Currently, teaching is being transferred from physical class-room teaching to remote or hybrid education. For this purpose, Virtual Reality (VR) provides a very welcome opportunity to complement in-presence teaching with exposure to examples of real manufacturing operations captured in videos of industrial case studies. Students apply learnings from theoretical classes to manufacturing case studies by identifying best practices and also recognizing waste. The presentation shares experience in teaching of lean methods based on AR technology to graduate engineering students. [less ▲]

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See detailBioKC: a platform for quality controlled curation and annotation of systems biology models
Vega Moreno, Carlos Gonzalo UL; Groues, Valentin UL; Ostaszewski, Marek UL et al

Scientific Conference (2020, September 04)

Standardisation of biomedical knowledge into systems biology models is essential for the study of the biological function. However, biomedical knowledge curation is a laborious manual process aggravated ... [more ▼]

Standardisation of biomedical knowledge into systems biology models is essential for the study of the biological function. However, biomedical knowledge curation is a laborious manual process aggravated by the ever increasing growth of biomedical literature. High quality curation currently relies on pathway databases where outsider participation is minimal. The increasing demand of systems biology knowledge presents new challenges regarding curation, calling for new collaborative functionalities to improve quality control of the review process. These features are missing in the current systems biology environment, whose tools are not well suited for an open community-based model curation workflow. On one hand, diagram editors such as CellDesigner or Newt provide limited annotation features. On the other hand, most popular text annotations tools are not aimed for biomedical text annotation or model curation. Detaching the model curation and annotation tasks from diagram editing improves model iteration and centralizes the annotation of such models with supporting evidence. In this vain, we present BioKC, a web-based platform for systematic quality-controlled collaborative curation and annotation of biomedical knowledge following the standard data model from Systems Biology Markup Language (SBML). [less ▲]

Detailed reference viewed: 88 (4 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 detailNumerical Analysis of Interaction between a Reacting Fluid and a Moving Bed with Spatially and Temporally Fluctuating Porosity
Rousset, Alban UL; Mainassara Chekaraou, Abdoul Wahid UL; Besseron, Xavier UL et al

Scientific Conference (2020, August 31)

The purpose of this study is to propose a numerical approach that combines low computational costs through the use of high computing efficiency, allowing the realistic use of the design with a sufficient ... [more ▼]

The purpose of this study is to propose a numerical approach that combines low computational costs through the use of high computing efficiency, allowing the realistic use of the design with a sufficient result's accuracy for industrial applications to investigate biomass combustion in a large-scale reciprocating grate. In the present contribution, a Biomass combustion chamber of a 16 MW geothermal steam super-heater, which is part of the Enel Green Power "Cornia 2" power plant,is being investigated with high-performance computing methods. For this purpose, the extended discrete element method (XDEM) developed at the University of Luxembourg is used in an HPC environment, which includes both the moving wooden bed and the combustion chamber above it. The XDEM simulation platform is based on a hybrid four-way coupling between the Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD). In this approach, particles are treated as discrete elements that are coupled by heat, mass, and momentum transfer to the surrounding gas as a continuous phase. For individual wood particles, besides the equations of motion, the differential conservation equations for mass, heat, and momentum are solved, which describe the thermodynamic state during thermal conversion. The grate system has three different moving sections to ensure good mixing of the biomass parts and appropriate residence time. The primary air enters from below the grate and is split into four different zones. Furthermore, a secondary air is injected at high velocity straight over the fuel bed through nozzles. A Flue Gas Recirculation is present and partly injected through two jets along the vertical channel and partly from below the grate. The numerical 3D model presented is based on a multi-phase approach. The biomass particles are taken into consideration via the XDEM Method, while the gaseous phase is described by CFD with OpenFOAM. Thus, the combustion of the particles on the moving beds in the furnace is processed by XDEM through conduction, radiation and conversion along with the interaction with the surrounding gas phase accounted for by CFD. The coupling of CFD-XDEM as an Euler-Lagrange model is used. The fluid phase is a continuous phase handled with an Eulerian approach and each particle is tracked with a Lagrangian approach. Energy, mass and momentum conservation is applied for every single particle and the interaction of particles with each other in the bed and with the surrounding gas phase are taken into account. An individual particle can have a solid, liquid, gas or inert material phases (immobile species) at the same time. The different phases can undergo a series of conversion through various reactions that can be homogeneous, heterogeneous or intrinsic (drying, pyrolysis, gasification and oxidation). Our first results are consistent with actual data obtained from the sampling of the residual solid in the industrial plant. Our model is also able to predict gas flux behaviour inside the furnace, particularly the flue gas recirculation on the combustion process injection. [less ▲]

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