References of "Unpublished conference"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailFour Cables-Suspended Parallel Robot with Reconfigurable platform
Golli, H. El; Kumar, Atal Anil UL; Antoine, J.F. et al

Scientific Conference (2022, August)

Full Text
Peer Reviewed
See detailSOniCS: Interfacing SOFA and FEniCS for advanced constitutive models
Mazier, Arnaud UL; El Hadramy, Sidaty; Brunet, Jean-Nicolas et al

Scientific Conference (2022, August)

The Simulation Open Framework Architecture (SOFA) is a software environment for building simulations with a particular focus on real-time medical applications, e.g. surgery. Its scope is far broader than ... [more ▼]

The Simulation Open Framework Architecture (SOFA) is a software environment for building simulations with a particular focus on real-time medical applications, e.g. surgery. Its scope is far broader than the FEniCS Project, encompassing e.g. rigid body dynamics, interfacing with haptic devices, contact and visualisation. Naturally, it also includes some finite element models of soft tissue mechanics, but these capabilities are currently ‘pre-baked’ and limited to a few simple constitutive models. The goal of this work is to incorporate state-of-the-art code generation tools from the FEniCS Project into SOFA in order to hugely increase SOFA’s capabilities in terms of soft tissue mechanics. To this end we have developed a new SOFA plugin named SOniCS. For adding a new material model in SOniCS, the user describes its strain energy density function using UFL (Unified Form Language) syntax. Then, using FFCx (FEniCSx Form Compiler) we generate the C code associated with the kernels corresponding to the automatically differentiated cell-local residual and stiffness forms. Finally, we assemble these kernels in SOFA into global tensors and solve the resulting non-linear systems of equations. The result is that it is now possible to straightforwardly implement complex material models such as the Holzapfel-Ogden anisotropic model into SOFA, and to use them alongside SOFA’s existing strong feature set in medical simulation. [less ▲]

Detailed reference viewed: 123 (10 UL)
Full Text
See detailNonlinear analysis of thin-walled structures based on tangential differential calculus with FEniCSx
Zilian, Andreas UL; Habera, Michal UL

Scientific Conference (2022, August)

We present an approach to implement the Tangential Differential Calculus (TDC) for a variety of thin-walled structures (beams, membranes, shells) in the framework of nonlinear kinematics and/or material ... [more ▼]

We present an approach to implement the Tangential Differential Calculus (TDC) for a variety of thin-walled structures (beams, membranes, shells) in the framework of nonlinear kinematics and/or material behaviour. In contrast to classical formulations the TDC describes kinematics, equilibrium and constitutive relation of the thin structure (as two-dimensional manifold) on the basis of a full three-dimensional deformation state. This allows to introduce the undeformed configuration of e.g. a shell directly in terms of a mesh of topological dimension 2 and geometrical dimension 3. Of particular interest is the use of finite elements of higher-order geometrical order to capture the (interpolated) curvature of the manifold with high accuracy. Numerical examples and reference implementations of this work to support nonlinear stress and post-buckling analyses (using a realisation of the classical arc-length method in FEniCSx) will be provided as a part of the package dolfiny (https://github.com/michalhabera/dolfiny). [less ▲]

Full Text
Peer Reviewed
See detailGoodness Groceries! A mobile sustainable food shopping app advocating for food literacy and ethical choices. Entailments for suppliers, consumers and researchers.
Reckinger, Rachel UL; Kapgen, Diane UL; Korjonen, Maria Helena UL et al

Scientific Conference (2022, August)

Within the currently rising concerns around sustainability of food systems, in the related economic areas of regenerative production modes, responsible supply chains and informed consumption, there often ... [more ▼]

Within the currently rising concerns around sustainability of food systems, in the related economic areas of regenerative production modes, responsible supply chains and informed consumption, there often remains a practice gap between what people know they should do and what they actually do. This is preceded by a knowledge gap: the knowledge of what a sustainable product specifically is tends not to be entirely consensual, blurred with potentially contradicting injunctions between different claims of sustainability. Instead of trying to solve this puzzle with metrics, we propose an App that makes various components of sustainability transparent, thus qualifying sustainability complexity. Our aim is not to hierarchically determine ‘the best’ sustainable choice, but rather to relationally empower consumers to choose the product with the sustainability criteria that most fit their values and priorities. Goodness Groceries is a University of Luxembourg consumer study piloting a mobile sustainable food shopping app in partnership with a supermarket chain. The App acts as a virtual shopping companion providing eco-responsible and ethical product information of selected staple food products, each time for up to four types: local organic, local conventional, imported organic and imported conventional. The information provided is based on self-assessments made by product suppliers. Each food item is granted criteria in the four main areas of Environment, Social Well-being, Economic Well-being and Good Governance, subdivided into relevant indicators (cf. SAFA guidelines, FAO 2014) – marked with easy-to-recognise icons. The user-friendly App is designed to scan alternatives of the same product via a QR code whilst shopping, to analyse if this helps consumers make an informed choice – or not, and why. Starting in Spring 2022, entailments of the (ongoing) study and App in terms of structural obstacles for researchers, necessary supply chain adaptations for suppliers and analysis of consumers’ shopping habits and App usage feedback will be discussed. [less ▲]

Detailed reference viewed: 65 (9 UL)
Full Text
See detailNonlinear local solver
Habera, Michal UL; Zilian, Andreas UL

Scientific Conference (2022, August)

Many engineering applications require solution of a global finite element problem coupled with nonlinear equations of local nature. Local in the sense, that for a known global state the local solution ... [more ▼]

Many engineering applications require solution of a global finite element problem coupled with nonlinear equations of local nature. Local in the sense, that for a known global state the local solution could be found on cell-by-cell basis. Examples include plastic deformation problems, static condensation (hybridization) of displacement-stress formulation or just a simple nonlinear constitutive laws to be satisfied at each quadrature point. These types of problems either required special libraries and extensions in order to be solved with FEniCS (and FEniCS-X) tools, or lead to very slow implementations due to hacks and tricks needed to achieve the solution (e.g. monolithic schemes which increase the matrix problem size). In this talk a unified approach tailored for the current state of FEniCS-X interfaces is presented. The approach computes consistent global tangent operator for nonlinear problems. In addition, local equations are formulated symbolically in UFL, and their derivatives are therefore computed automatically. Several low-level examples (incl. plasticity with symbolic yield surface, nonlinear static condensation and materials with implicit constitutive laws) that demonstrate the main concepts are presented. Finally, high-level wrappers for this functionality are presented. These come as a part of package `dolfiny` (https://github.com/michalhabera/dolfiny). [less ▲]

See detailMultilingualism as Challenge for Luxembourgish Literary Historiography
Glesener, Jeanne UL

Scientific Conference (2022, July 29)

Detailed reference viewed: 34 (2 UL)
See detailEtzels Vielvölkerhof – ein Modell europäisch vernetzter Herrschaft?
Bendheim, Amelie UL

Scientific Conference (2022, July 29)

Detailed reference viewed: 48 (0 UL)
Full Text
Peer Reviewed
See detailTowards Online System Identification: Benchmark of Model Identification Techniques for Variable Dynamics UAV Applications
Song, Junlin UL; J. Sanchez-Cuevas, Pedro; Olivares-Mendez, Miguel

Scientific Conference (2022, July 26)

Detailed reference viewed: 26 (4 UL)
Full Text
Peer Reviewed
See detail"Mapping" biographies in relational databases - The case of Luxembourg soldiers in the Second World War
Janz, Nina UL

Scientific Conference (2022, July 25)

The Impact and Legacy of War Experiences in Luxembourg” researches the personal side of the history of Luxembourgish youth born between 1920 and 1927 who were enrolled into German services under the Nazi ... [more ▼]

The Impact and Legacy of War Experiences in Luxembourg” researches the personal side of the history of Luxembourgish youth born between 1920 and 1927 who were enrolled into German services under the Nazi occupation of Luxembourg during World War II. The research focuses on personal testimonies and their individual war experience to uncover these men, women, and families’ individual experiences. Using a relational database to represent their war experiences, we face several challenges, such as a data structure that is too rigid and strict to “map” the fluid and unpredictable life patterns of our study subjects. We developed a data model where we treat different life stations (military unit, POW camp etc.) as equal data levels like our recruits (as persons). Each “life station” or event we treat as a “person” and create a separate “biography” to include all relevant data. Afterwards, we link the life stations or events with the actual person in the database. The aim of my contribution is the “translation” of lives, with its twists and turns into a static data set such as a relational database to map the individual war experiences of our study object. [less ▲]

Detailed reference viewed: 43 (3 UL)
Peer Reviewed
See detailDeveloping collaborative practices in ECE in Luxembourg 
Kirsch, Claudine UL

Scientific Conference (2022, July 22)

Detailed reference viewed: 14 (0 UL)
Full Text
See detailHigh-Performance Computing for the simulation of particles with the Discrete Element Method
Besseron, Xavier UL

Scientific Conference (2022, July 21)

In this talk, we will give an overview of the main techniques used for the parallelization of numerical simulations on High-Performance Computing platforms, and provide a particular focus on the Discrete ... [more ▼]

In this talk, we will give an overview of the main techniques used for the parallelization of numerical simulations on High-Performance Computing platforms, and provide a particular focus on the Discrete Element Method (DEM), a numerical method for the simulation of the motion of granular materials. We will cover the main parallelization paradigms and their implementations (shared memory with OpenMP and distributed memory with MPI), present the performance bottlenecks and introduce load-balancing techniques. [less ▲]

Detailed reference viewed: 110 (42 UL)
Peer Reviewed
See detailTranslanguaging pedagogy and creative activism for preschool teachers, parents, and children
Aleksic, Gabrijela UL

Scientific Conference (2022, July 14)

There are 64 % of four-year old children who not speak Luxembourgish at home (MENJE, 2018). The government proclaimed multilingual early education mandatory in 2017, obliging teachers to develop ... [more ▼]

There are 64 % of four-year old children who not speak Luxembourgish at home (MENJE, 2018). The government proclaimed multilingual early education mandatory in 2017, obliging teachers to develop children’s Luxembourgish, familiarizing them with French, and valuing their home languages. Thus, the present project was threefold: (1) to offer an 18-hours professional development (PD) course in translanguaging pedagogy to 40 teachers over 6 months, (2) to strengthen home-school collaboration, and (3) to support children’s linguistic, socio-emotional, and cognitive development and engagement in the classroom. The results from teacher questionnaires, focus groups, and interviews, showed that there was some positive change regarding the attitudes towards children’s home languages. The interviews with 17 parents indicated that there was a need for more home-school collaboration. The tests in early literacy and numeracy with 23 preschool children over one year, identified that children performed higher in their home languages. The video observations showed that every time the teacher used children’s languages in the classroom, this impacted positively their well-being. Following the principles of creative activism, the author produced three outcomes: (1) the website with over 100 practical activities on how teachers can involve children’s languages and families, (2) the illustrated book Sumak for parents, showing difficulties with integration in a new country, and (3) the illustrated book, Mara’s song for preschool children, showing how Mara, a girl who is laughed at because of her language and culture, finds her way through singing a song inspired by a bird. [less ▲]

Detailed reference viewed: 22 (0 UL)
See detailJewish History and the Politics of Digitisation
Zaagsma, Gerben UL

Scientific Conference (2022, July 13)

This paper discusses the politics of Jewish Studies by focusing on the digitisation of Jewish cultural heritage and its effects for research into Jewish history(ies). In the past few years we have ... [more ▼]

This paper discusses the politics of Jewish Studies by focusing on the digitisation of Jewish cultural heritage and its effects for research into Jewish history(ies). In the past few years we have witnessed the emergence of what could be termed the critical turn in digital humanities with an increasing focus on how digital resources shape various parts of the research process and its outcomes. One aspect of that turn is more attention to digital source criticism and the politics of digitisation of cultural heritage. There are many aspects of digitisation that can be considered “political”, from selection for digitisation to modes of access to broader questions about the political aspects of infrastructure or ‘infrapolitics’. None of these is specific to our digital age nor to Jewish Studies, and historical context is crucially important.  This paper builds upon my recent reseach into the politics of digitisation and considers the case of Jewish Studies, framed within the broader context of the politics of heritage and its preservation. It set outs a number of broad parameters for discussion, with the aim to encourage further debate. Questions to be addressed include: what Jewish heritage is being digitised and which stories about the Jewish past can (and cannot) be told on its basis? Which players are involved in digitisation and how do both top-down national strategies and bottom-up community initiatives guide the process? How do memory politics influence selection processes? And how does transnational heritage fare in an age where many digitisation programs are nationally framed and funded? The paper will use the historical example of the digitisation of Yiddish heritage to illustrate these questions and provide a concrete example.  [less ▲]

Detailed reference viewed: 25 (0 UL)
Full Text
See detailTowards practical Genome-Wide Association Studies: Overview and Challenges
Pascoal, Túlio UL; Decouchant, Jérémie UL; Volp, Marcus UL

Scientific Conference (2022, July 11)

The popularization of large-scale federated Genome-Wide Association Study (GWAS) where multiple data owners share their genome data to conduct federated analytics uncovers new privacy issues that have ... [more ▼]

The popularization of large-scale federated Genome-Wide Association Study (GWAS) where multiple data owners share their genome data to conduct federated analytics uncovers new privacy issues that have remained unnoticed or not given proper attention. Indeed, as soon as a diverse type of interested parties (e.g., private or public biocenters and governmental institutions from around the globe) and individuals from heterogeneous populations are participating in cooperative studies, interdependent and multi-party privacy appear as crucial issues that are currently not adequately assessed. In fact, in federated GWAS environments, the privacy of individuals and parties does not depend solely on their own behavior anymore but also on others, because a collaborative environment opens new credible adversary models. For instance, one might want to tailor the privacy guarantees to withstand the presence of potentially colluding federation members aiming to violate other members' data privacy and the privacy deterioration that might occur in the presence of interdependent genomic data (e.g., due to the presence of relatives in studies or the perpetuation of previous genomic privacy leaks in future studies). In this work, we catalog and discuss the features, unsolved problems, and challenges to tackle toward truly end-to-end private and practical federated GWAS. [less ▲]

Detailed reference viewed: 61 (7 UL)
See detailLe parcours de vie entre défense sociale et maladie mentale de Maxence C. Etude d’un cas de dégénéré délinquant dans la Belgique du XXème siècle
Dal Zilio, Samuel UL

Scientific Conference (2022, July 08)

« L’intelligence et le sens moral d’un enfant de 8 ans », c’est par ces mots qu’en août 1933, le médecin-chef de l’Etablissement de Défense Sociale de Tournai qualifie l’état psychique de Maxence C., un ... [more ▼]

« L’intelligence et le sens moral d’un enfant de 8 ans », c’est par ces mots qu’en août 1933, le médecin-chef de l’Etablissement de Défense Sociale de Tournai qualifie l’état psychique de Maxence C., un débile mental (sic) reconnu coupable du chef de vol et d’escroquerie mais jugé incapable du contrôle de ses actions. A l’aube de ses 27 ans, ce « demi-fou » enchaîne depuis vingt ans les séjours en institution. Entre internats médico-pédagogiques, asiles d’aliénés et établissements de défense sociale, le parcours de vie de Maxence C. est jalonné de multiples interactions avec les autorités judiciaires, médicales et administratives qui tantôt le condamne à l’incarcération, tantôt favorise sa réhabilitation au sein de la société. Arrimé à cette identité de marginal dans un « monde faux et crapuleux » selon ses dires, Maxence C. peine à acquérir une pleine autonomie synonyme de liberté (re)trouvée. Travail, suivi médical, tutelle morale et accompagnement familial semblent toujours vains. Devenu sexagénaire, il demeure ainsi un « danger social » balloté entre asiles-prisons et prisons-asiles aux quatre coins du royaume. A travers l’examen minutieux d’un dossier de plusieurs centaines de pages élaboré par la Commission de défense sociale de Forest, cette communication propose de mettre en lumière la complexité de la trajectoire de vie d’un individu à la fois criminel et aliéné, visé par un dispositif hybride de sécurité et de soins. Si cette étude considère la perspective du patient à travers une histoire par le bas, elle dépasse celle-ci pour entrouvrir la possibilité d’un récit polyphonique sur des temps longs qui confronte de multiples voix (celle de l’administration et de la police, celle des médecins et des magistrats, celle du malade et de ses proches). Nourrit par les enseignements de la micro-histoire et de l’étude de cas dans la recherche historique, cette contribution offre un regard original sur l’évolution des normes qui conditionnent un mouvement vers ou, au contraire, hors de l’institution. Les phases d’entrée et de sortie des établissements sont en effet des moments charnières de l’affirmation du pouvoir des acteurs. Dès lors, quels sont les motifs à une incarcération et quelles sont les conditions à un élargissement ? Comment s’organise la prise de la décision entre les différents intervenants ? Et qui en assure le contrôle et le suivi ? Enfin, quelles sont les marges de manœuvre et les capacités d’actions du « malade » face à eux ? Cette étude d’une trajectoire de vie individuelle constitue également une opportunité de s’interroger sur l’évolution des systèmes de prise en charge des criminels malades mentaux dans le royaume au XXème siècle. Ainsi durant l’existence de Maxence C. se créent de nouvelles structures psychiatriques (dispensaires d’hygiène mentale, annexes psychiatriques dans les prisons et les hôpitaux généraux, établissements de défense sociale, etc.) se construisent des nouvelles politiques sociales (INAMI, CPAS, mutualités, etc.), s’élaborent des nouvelles législations (loi relative à la défense sociale, au handicap, à la maladie mentale), s’affirment de nouveaux métiers de la santé mentale (psychologue, infirmière psychiatrique, assistants sociaux, etc.), s’établissent de nouveaux rapports à la folie, au handicap et à la criminalité. [less ▲]

Detailed reference viewed: 22 (0 UL)
See detailIf there’s something strange in your [cyber]hood – who you gonna call?
Schmitz, Sandra UL

Scientific Conference (2022, July 07)

Detailed reference viewed: 33 (1 UL)
Full Text
Peer Reviewed
See detailQuality of Work and Quality of Employment Profiles and their longitudinal impact on well-being
Sischka, Philipp UL; Fernandez de Henestrosa, Martha UL; Steffgen, Georges UL

Scientific Conference (2022, July 06)

Many studies on job quality operationalize job quality as a composite indicator (Munoz de Bustillo et al., 2011) and investigate its link with different well-being outcomes or investigate the incremental ... [more ▼]

Many studies on job quality operationalize job quality as a composite indicator (Munoz de Bustillo et al., 2011) and investigate its link with different well-being outcomes or investigate the incremental effects of specific job characteristics on well-being. However, these variable-centered approaches on job quality ignore the fact that certain job characteristic configurations cluster in specific employee groups (Van Aeren et al., 2014). Thus, the current longitudinal study employs a person-centered approach (i.e., latent profile and transition analysis (LPA/LTA), e.g., Spurk et al., 2020) to identify groups of employees that show different job characteristic profiles (over time). Data were collected via CATI or CAWI within a stratified random sample from Luxembourg’s working population (nWave 1 = 1,689; nWave 2 = 848). The survey contains eleven quality of work and six quality of employment dimensions that were used as indicators for the latent profile analysis. Moreover, the survey contains different mental health and work-related attitudinal outcomes. Fit indices and substantive interpretability/utility were jointly considered to determine the number of profiles. To explore the relationships between the latent categorical variable and the other variables, we followed the three-step procedure (e.g., Asparouhov & Muthén, 2014) LPA revealed five profiles, i.e., poor working conditions (1), medium working conditions, high work intensity (2), high working conditions, medium work intensity (3), high working conditions, high work intensity and physical demands (4), medium working conditions, low work intensity (5). Cross-sectionally, these profiles were meaningfully linked with mental and attitudinal outcomes. LTA suggests the stability of these profiles within one year, with varying impact depending on mental health and work-related attitudinal outcome. Scholars and policy makers need to be aware of job characteristic configurations. To promote employee’s well-being organizations and policy makers need to redesign the ecological contexts of working conditions depending on its profiles. [less ▲]

Detailed reference viewed: 19 (4 UL)
Peer Reviewed
See detailCentrality and city size effects on NO2 ground and tropospheric concentrations within European cities
Wei, Yufei UL; Caruso, Geoffrey UL; Lemoy, Rémi

Scientific Conference (2022, July 06)

Detailed reference viewed: 58 (20 UL)
Peer Reviewed
See detailWhich Factors Play a Role in Coco Issuance? Evidence from European Banks.
Wolff, Christian UL

Scientific Conference (2022, July 06)

Detailed reference viewed: 23 (2 UL)
Full Text
Peer Reviewed
See detailClimate Risk and Price Jumps
Lehnert, Thorsten UL

Scientific Conference (2022, July 05)

Detailed reference viewed: 59 (2 UL)
See detailEconomic Sanctions and International Investment Law: Investor and State Defences
Garcia Olmedo, Javier UL

Scientific Conference (2022, July 04)

This workshop examines the law and practice of economic sanctions in light of current developments in the Ukraine-Russia conflict. It explores the legality and implementation of, and possible challenges ... [more ▼]

This workshop examines the law and practice of economic sanctions in light of current developments in the Ukraine-Russia conflict. It explores the legality and implementation of, and possible challenges to, economic sanctions imposed by a number of international actors (including the US, the EU and the UK), as well as their potential impact on businesses and dispute resolution. [less ▲]

Detailed reference viewed: 68 (4 UL)
Peer Reviewed
See detailPourquoi les enseignants décident-ils de s'ouvrir aux familles ? résultats issus d'une consultation nationale au Grand-Duché du Luxembourg
Poncelet, Débora UL; Tinnes, Mélanie UL; Dierendonck, Christophe UL

Scientific Conference (2022, July 01)

En décembre 2021, une enquête, intitulée « Consultation des acteurs de l’école fondamentale. Une étude scientifique participative » a permis la collecte de données auprès des enseignants de l’école ... [more ▼]

En décembre 2021, une enquête, intitulée « Consultation des acteurs de l’école fondamentale. Une étude scientifique participative » a permis la collecte de données auprès des enseignants de l’école fondamentale et des éducateurs gradués. La thématique des relations école-famille a constitué un des aspects investigués dans l’étude. Depuis une vingtaine d’années, un intérêt croissant pour la thématique est observé. Une revue de la littérature récente (par exemple, Axford et al., 2019 ; Englund et al., 2004 ; Kim, Mok & Seidel, 2020, Roy & Giraldo-García, 2018 ; Huat See & Gorard, 2015), a montré à quel point les relations école-famille ainsi que l’engagement parental dans la scolarité de l’enfant pouvaient avoir une influence significative et positive à la fois sur les performances scolaires mais aussi sur des variables conatives (motivation scolaire, engagement ou adoption de comportements scolairement attendus). En outre, étant donné la grande diversité culturelle et socioéconomique des parents dont les enfants fréquentent l’école fondamentale comme la place accordée au partenariat avec les familles dans la loi scolaire, cette thématique est apparue comme incontournable pour le recueil de données. La théorie du comportement planifié (TCP) a été retenue comme un des modèles théorique et d’analyse des données collectées (voir exemple à ce sujet, Ajzen, 1991 ; Armitage et Conner, 2001). Ce modèle théorique vise à prédire et à expliquer un comportement au départ d’un processus cognitif et émotionnel incluant quatre éléments distincts : (1) les attitudes envers le comportement cible, (2) les normes subjectives en lien avec ce comportement, (3) le contrôle comportemental perçu et (4) l’intention d’adopter le comportement cible. Nous chercherons par conséquent à mettre en évidence l’intention des acteurs interrogés d’adopter des comportements propices à l’ouverture et à la communication envers les familles sur la base de leurs attitudes explicites. C’est ainsi que les conceptions et attitudes spécifiques, instrumentales comme affectives, ont été étudiées au départ de 6 items dont cinq sont originaux et un issu de l’instrument de Cárcamo-Vásquez & Rodríguez-Garcés (2015). En ce qui concerne les pratiques relatives à la relation école-famille, elles ont été observées par le biais de deux aspects : 1) la qualité des relations école-famille actuelles telles que perçues par les répondants (Vickers & Mincke, 1995 ; Dawson & Wymbs, 2016) et 2) les actions mises en œuvre pour susciter l’engagement des parents dans l’éducation scolaire de leur enfant soit à domicile, soit à l’école, soit par le biais des communications avec l’école (Hoover-Dempsey & Sandler, 2005 ; Manz, Fantuzzo & Power, 2004). Après avoir décrit la population interrogée et fournit des informations importantes sur le contexte de l’institution scolaire luxembourgeoise en matière d’hétérogénéité des publics, nous présenterons les premiers résultats de l’enquête en ce qui concerne la thématique des relations école-famille selon la théorie du comportement planifié. Bibliographie Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179–211. https://doi: 10.1016/0749-5978(91)90020-T Armitage, C. & Conner, M. (2001). Efficacy of the Theory of Planned Behaviour: A meta-analytic review. British Journal of Social Psychology, 40, 471-499. https://doi.org/10.1348/014466601164939 Axford, N., Berry, V., Lloyd, J., Moore, D., Rogers, M., Hurst, A., Blockley, K., Durkin,H. and Minton, J. (2019). How Can Schools Support Parents’ Engagement in their Children’s Learning? Evidence from Research and Practice. London: Education Endowment Foundation. Report available from: https://educationendowmentfoundation.org.uk/evidence-summaries/evidence-reviews/parental-engagement/ (retrieved February 2022). Cárcamo-Vásquez, H., Rodríguez-Garcés, C. (2015). Rol parental educativo: aproximación a las percepciones que poseen los futuros profesores. Educ., 18(3), 456-470. https://DOI: 10.5294/edu.2015.18.3.5 Dawson, A. E., & Wymbs, B. T. (2016). Validity and Utility of the Parent–Teacher Relationship Scale–II. Journal of Psychoeducational Assessment, 34(8), 751–764. https://doi.org/10.1177/0734282915627027   Englund, M. M., Luckner, A. E., Whaley, G. J. L., & Egeland, B. (2004). Children's Achievement in Early Elementary School: Longitudinal Effects of Parental Involvement, Expectations, and Quality of Assistance. Journal of Educational Psychology, 96(4), 723–730. https://doi.org/10.1037/0022-0663.96.4.723 Hoover-Dempsey, K.V., & Sandler, H.M. (2005). Final Performance Report for OERI Grant # R305T010673. The Social Context of Parental Involvement: A Path to Enhanced Achievement. Presented to Project Monitor, Institute of Education Sciences, U.S. Department of Education, March 22, 2005. Huat See, B., & Gorard, S. (2015). The role of parents in young people’s education—a critical review of the causal evidence. Oxford Review of Education, 41, 346-366. Kim, Y., Mok, S.Y., & Seidel, T. (2020). Parental influences on immigrant students' achievement-related motivation and achievement: A meta-analysis. Educational Research Review, 30, 1-19. https://doi.org/10.1016/j.edurev.2020.100327 Manz, P. H., Fantuzzo, J. W., & Power, T. J. (2004). Multidimensional assessment of family involvement among urban elementary students. Journal of School Psychology, 42(6), 461–475. https://doi.org/10.1016/j.jsp.2004.08.002 Roy, M., & Giraldo-García, R. (2018). The role of parental involvement and social/emotional skills in academic achievement: Global perspectives. The School Community Journal, 28(2), 29–46. Vickers, H. S., & Minke, K. M. (1995). Exploring parent-teacher relationships: Joining and communication to others. School Psychology Quarterly, 10(2), 133–150. https://doi.org/10.1037/h0088300 [less ▲]

Detailed reference viewed: 217 (50 UL)
Peer Reviewed
See detailUnderstanding Content Bias: Qualitative research supports computational methods
Hoehn, Sviatlana UL; Lewandowska-Tomaszczyk, Barbara; Mauw, Sjouke UL et al

Scientific Conference (2022, July 01)

Full Text
Peer Reviewed
See detailTowards real-time patient-specific breast simulations: from full-field information to surrogate model
Mazier, Arnaud UL; Lavigne, Thomas UL; Lengiewicz, Jakub UL et al

Scientific Conference (2022, July)

In breast cancer treatment, surgery is one of the most common practices [DeSantis et al., 2019]. The surgery involves a complex pipeline, principally due to the difference between the imaging and the ... [more ▼]

In breast cancer treatment, surgery is one of the most common practices [DeSantis et al., 2019]. The surgery involves a complex pipeline, principally due to the difference between the imaging and the surgical posture [Mazier et al., 2021]. Indeed, because of the stance difference, the surgeon has to rely on radioactive or invasive markers to predict the tumor position in the surgical setup. Biomechanical simulations could predict such complex tumor displacements but often require patient-specific data (material properties, organs geometries, or loading and boundary conditions). Full-field acquisitions coupled with landmark identifications allow obtaining relative deformation between the different configurations. Having this information and assuming a finite element model, an identification procedure of the model parameters can be carried out. Finally, finding a suitable computational model allowing for a compromise between accuracy and speed, one may consider surrogate models for real-time simulations (20 to 50 FPS). In this work, we obtained the patient-specific geometry through micro-computed tomography in 8 different configurations, including 15 bio-markers. Assessing the displacement of the bio-markers enabled us to infer the relative strains between the different configurations. A heterogeneous neo-Hookean model was assumed for simulating soft tissue behavior. Based on the displacements and the position of the biomarkers, model parameters identification was performed to calibrate the experimental data with the finite element method results. To overcome speed performance issues, Convolutional Neural Network (CNN) trained with a synthetic simulation-based dataset generated by applying different gravity directions is used. Preliminary results show that CNN can predict the displacement of anatomical landmarks to millimetric precision and is 100 times faster than the finite element method, satisfying our real-time objective. Plus, the use of Bayesian inferences involves a longer prediction time but allows a 95% confidence interval of the biomarkers' displacements. For a given precision, contrary to CNNs, optimization methods are computationally expensive and depend on an initialization point. Although CNNs require new training for each patient, optimization algorithms can be applied regardless of the patient's geometry. Through this study, we observed that material properties were playing an essential role but not as much as the anatomical structures e.g. infra-mammary or Copper’s ligaments. [less ▲]

Detailed reference viewed: 156 (10 UL)
Full Text
Peer Reviewed
See detailAutonomous control for satellite rendezvous in near-Earth orbits
Muralidharan, Vivek UL; Martinez Luna, Carol UL; Zinys, Augustinas et al

Scientific Conference (2022, July)

CubeSats are being deployed for a number of activities including Earth observation, telecommunications, scientific experiments, and due to their low cost and flexibility, more often than not, they are ... [more ▼]

CubeSats are being deployed for a number of activities including Earth observation, telecommunications, scientific experiments, and due to their low cost and flexibility, more often than not, they are even being considered for use in On-Orbit Servicing (OOS) and debris removal missions. This investigation focuses on using the CubeSat technology to perform autonomous proximity operations with passive target bodies including satellites or space debris. The nonlinear coupled attitude and orbit dynamics for the chaser and the target bodies are modelled and simulated. A nonlinear optimal controller identifies an appropriate rendezvous path. A vision-based navigation system on the chaser satellite records the pose of the target body. The pose observations with stochastic uncertainties are processed using a Kalman filter, and offer state feedback along the satellite path. Such observations in conjunction with the postulated linear control algorithm anchor the chaser to approach the target by maintaining appropriate relative configuration. The linear controller delivers regular maneuvers to compensate for any deviations from the identified reference path. A close-range rendezvous operation is illustrated in a Mission Design Simulator (MDS) tool. [less ▲]

Detailed reference viewed: 120 (32 UL)
Peer Reviewed
See detailStudent-Situation Relations in Students’ Real-Time Perceptions of Instructional Quality
Talic, Irma UL; Rauthmann, John F.; Renner, K.-H. et al

Scientific Conference (2022, July)

Detailed reference viewed: 17 (0 UL)
See detailMultilevel Access to Justice in Environmental Matters in the European Union: A Systemic Imbalance?
Muñoz, Susana UL

Scientific Conference (2022, June 30)

The European Union (EU) is a Party to the Aarhus Convention, as are, separately, its 27 Member States. The EU’s composite and multi-layered system raises important issues as regards compliance with this ... [more ▼]

The European Union (EU) is a Party to the Aarhus Convention, as are, separately, its 27 Member States. The EU’s composite and multi-layered system raises important issues as regards compliance with this Convention. As a new kind of environment agreement, it grants the public rights and imposes on Parties obligations regarding access to information, public participation, and access to justice in environmental matters – the three pillars of environmental democracy. Access to justice emerges as the primary means for the Convention’s enforcement, supporting the two other pillars’ implementation, and safeguarding the rights it enshrines and those arising from EU or national law. Despite its pivotal importance, there is no common framework for access to environmental justice in the EU. Numerous obstacles remain at various levels. Considerable discrepancies exist between national systems. According to the ACCC, the EU failed to comply with its obligations under the Convention regarding acts and omissions by the EU institutions and bodies that contravene EU environmental law. As part of the European Green Deal, Regulation (EU) 2021/1767 – adopted on 6 October 2021 prior to the opening of the seventh session of the Meeting of the Parties – introduces significant amendments to the Aarhus Regulation which are expected to bring the EU into compliance with the Convention. Building on EU and national case-law and legislation, this paper provides a critical analysis of the amended Regulation and its impact on the implementation of the EU’s multilevel access to justice to protect every person’s right to a healthy environment. [less ▲]

Detailed reference viewed: 14 (0 UL)
Full Text
See detailWhen the “vulnerable” talk back: subjective responses and individual experiences of young refugees
Gilodi, Amalia UL; Richard, Catherine UL

Scientific Conference (2022, June 30)

In the context of international protection and reception, an increasing amount of interest has been given to the assessment of vulnerability among forced migrants in order to provide special provisions ... [more ▼]

In the context of international protection and reception, an increasing amount of interest has been given to the assessment of vulnerability among forced migrants in order to provide special provisions and guarantees to ‘vulnerable refugees’. However, a common definition of vulnerability does not exist. The systematisation of individuals’ experiences in pre-defined bureaucratic categories risks ignoring the contextual and contingent nature of migrants’ vulnerability, the subjective and biographical differences among those considered vulnerable and the agency of each individual facing conditions of vulnerability. Thus, in the context of the H2020 project MIMY, this paper proposes to explore the experiences and feelings of the people living in an apparent condition of vulnerability. Based on in-depth interviews with young adults who obtained refugee status in Luxembourg but still live in ‘temporary’ reception centres, the current study wants to move beyond the bureaucratic vulnerability label, questioning the relationship between structural, contingent and material conditions of vulnerability and the subjective experiences and responses of the active agents who occupy them. Additionally, bringing the stories and perspectives of young refugees living in Luxembourg to the forefront, the study points to the variability of vulnerability at the individual level in the context of integration. We propose to analyse such plurality of stories through the lens of agency and temporality, as the unique product of past personal experiences, current situations of difficulty and conditions of(in)security (based on the interrelationship between obstacles and resources) and individual future perspectives and feelings of self-efficacy. [less ▲]

Detailed reference viewed: 20 (1 UL)
See detailFemmes (monoparentales) en difficultés de logement
Dujardin, Céline UL

Scientific Conference (2022, June 30)

Le projet SOHOME (Social Housing and Homelessness) poursuit des questions de recherché liées aux personnes en difficultés de logement au Luxembourg. Il dresse un état de lieu actuel en explorant les ... [more ▼]

Le projet SOHOME (Social Housing and Homelessness) poursuit des questions de recherché liées aux personnes en difficultés de logement au Luxembourg. Il dresse un état de lieu actuel en explorant les offres d’aide et les pistes de solution dans le champ de l’intervention sociale. Les principales questions de recherche sont les suivantes : (1) Qu’est-ce qui caractérise la population concernée au Luxembourg ? (2) Comment les politiques sociales et le travail social répondent-ils aux enjeux identifiés ? (3) Quels sont les principaux défis du travail social dans le domaine du sans-abrisme et de l’exclusion liée au logement ? Par le biais d’une méthodologie de recherche qualitative, le projet permet de nombreux aperçus dans le champ de l’intervention sociale. La présente communication aborde la problématique des femmes en difficultés de logement qui sont accueillies seules ou avec leurs enfants dans un foyer d’urgence pour femmes. Deux questions précises guident cette partie du projet de recherche : (1) Qu’est-ce qui caractérise les femmes en difficultés de logement au Luxembourg ? (2) Quelles sont les offres d’aide du travail social et les défis rencontrés face aux femmes concernées ? Les femmes touchées par des grandes difficultés liées au logement forment un groupe statistiquement plutôt invisible parce qu’elles cherchent d’autres solutions de logement que l’hébergement en foyer d’urgence (Batista, 2010). Les résultats de notre étude montrent que les femmes encadrées sans enfants arrivent souvent plus rapidement à stabiliser leur situation (cf. Finfgeld-Connett, 2010). Par contre, les femmes de 45 ans et plus ainsi que les femmes avec enfants semblent être les groupes les plus vulnérables pris en charge par les différents foyers d’urgence pour femmes au Luxembourg. La communication abordera les résultats liés aux deux questions ciblées sur les femmes concernées en les mettant en lien avec la politique sociale au Luxembourg. [less ▲]

Detailed reference viewed: 54 (0 UL)
Full Text
See detailLe travail frontalier "à distance" : les enjeux du télétravail et des espaces de coworking dans un espace transfrontalier
Pigeron-Piroth, Isabelle UL; Belkacem, Rachid

Scientific Conference (2022, June 30)

The objective of this paper is to identify the economic and social challenges of telework in the context of a cross-border labor market : Greater Region SaarLorLux, a cross-border area including ... [more ▼]

The objective of this paper is to identify the economic and social challenges of telework in the context of a cross-border labor market : Greater Region SaarLorLux, a cross-border area including Luxembourg, Lorraine (in France), Saarland and Rhineland Palatinate (in Germany) and Wallonia (in Belgium). This area is strongly concerned by the flows of border workers (nearly 260,000 in 2021). Teleworking has been imposed by the pandemic and is not without raising a certain number of questions: legal, social, fiscal.... linked to the presence of the border between the place of residence and the place of work. In a context of mobility and congestion problems, another form of remote work has developed in recent years : coworking spaces. This paper aims to discuss these two organizational modalities of teleworking, but also their challenges for the development of the border territories of both residence and work. [less ▲]

Detailed reference viewed: 81 (0 UL)
See detailwenn Dinge Höflichkeit machen. Materialität der Höflichkeit in der Literatur des Mittelalters
Reicher, Ruth UL

Scientific Conference (2022, June 30)

Detailed reference viewed: 13 (0 UL)
See detailWeb archives of the COVID-crisis : challenges related to short-term and long-term readability
Schafer, Valerie UL

Scientific Conference (2022, June 29)

During the COVID-19 crisis many institutions have started live and special collections related to web archives of the pandemic. Many libraries have also been involved in an initiative led by the IIPC ... [more ▼]

During the COVID-19 crisis many institutions have started live and special collections related to web archives of the pandemic. Many libraries have also been involved in an initiative led by the IIPC (International Internet Preservation Consortium) to gather a huge international collection of web archives available through Archive-It. Taking as a starting point two research projects related to the analysis of the web archiving of the COVID crisis, that we conducted within WARCnet and through the AWAC2 cohort program, this presentation will focus on issues related to scalable reading, contextualization of datasets, FAIR data, sustainability, inclusiveness, etc., in order to unfold the challenges of these collections and of their analysis in a short and in a long term perspective. [less ▲]

Detailed reference viewed: 21 (0 UL)
Full Text
Peer Reviewed
See detailDemocracy and the digital revolution – steering an evolving paradigm
Danescu, Elena UL

Scientific Conference (2022, June 29)

Knowledge-based societies rely to a large extent on intangible assets and digital technologies, and these are having an increasing impact on information systems, power, governance and citizenship, driven ... [more ▼]

Knowledge-based societies rely to a large extent on intangible assets and digital technologies, and these are having an increasing impact on information systems, power, governance and citizenship, driven by a proliferation of stakeholders and networks at multiple levels (states, international organisations, private companies, civil society and citizens. There is a clear need for international regulation in this area. This paper takes a multidisciplinary approach, combining an examination of theoretical, conceptual and methodological frameworks with an analysis of relevant public and private archives, with a threefold objective: 1) to outline issues and challenges in terms of human rights, freedom and democracy; 2) to identify the regulatory provisions adopted at European and international level to promote accountability, civic engagement and digital literacy through new forms of (mediated) democracy; and 3) to identify future prospects, risks and uncertainties in the era of artificial intelligence. [less ▲]

Detailed reference viewed: 142 (2 UL)
Full Text
Peer Reviewed
See detailDESIGN OF BIOMECHANICAL TESTING DEVICE FOR THE PELVIS INCLUDING GAIT MUSCLE FORCES
Soliman, Ahmed Abdelsalam Mohamed UL; Ricci, Pierre-Louis; Kedziora, Slawomir UL et al

Scientific Conference (2022, June 27)

Detailed reference viewed: 19 (4 UL)
See detailTrainees in an EU institution: Getting ready for a multilingual workplace
Lovrits, Veronika UL

Scientific Conference (2022, June 24)

Institutions of the European Union welcome over 2,000 trainees every year (EPSO 2022). What can the young graduates learn about the specifics of language use in a multilingual workplace? To find out, the ... [more ▼]

Institutions of the European Union welcome over 2,000 trainees every year (EPSO 2022). What can the young graduates learn about the specifics of language use in a multilingual workplace? To find out, the present sociolinguistic study interviewed 8 juniors (trainees) and 4 seniors (permanent employees) in a terminology and communication unit in an EU institution in Luxembourg. Qualitative data were collected from September 2020 to May 2021 in a participatory manner (McIntyre 2008), joining the recent interest in folklinguistic empowerment (Rymes 2021). The researcher took part in discussions with participants and encouraged their in-depth reflection on communication in the multilingual workplace. Iterative interviews, viewed as social interaction with critical reflective positioning of the researcher (Deppermann 2013), were accompanied by observation of meetings (online, due to Covid-19 pandemics), reflective drawing of metaphors by participants (Molinié 2009), and written reflections. Participants were free to define what language and multilingualism meant to them, as the study also aimed to avoid implicit methodological nationalism (Kraus 2018). Informed by the results of a pilot study in the same workplace (Lovrits and de Bres 2021), the collected data were subjected to a discursive analysis of stances (Jaffe 2009). Results showed that trainees’ understanding of language competence at work changed over the time. Aligning with stances of their supervisors towards the end of the traineeship stay, the juniors no longer focused on a linguistic standard in everyday communication. Instead, they began to pay more attention to the socio-emotional and relational aspects of their language use. The trainees reconstructed their understanding of (flexible) multilingualism as a basis for personal well-being at work and stopped fixating on formal linguistic "mistakes". Moreover, since research has emphasized socio-pragmatic diversity in the process of meaning making (Verschueren 2000), the seniors recognized the trainees' need to make the pragmatic aspects of everyday multilingualism explicit. This revelation has led to changes in language management in the workplace and has the potential to further inspire lifelong learning and professional development in the changing conditions of the global labour market (Budach and de Saint-Georges 2017). The findings are particularly relevant for professionals who facilitate transitions from monolingual to multilingual environments. The study reveals the importance of metalinguistic awareness in people coming from linguistically homogeneous settings into the so called "post-monolingual conditions" (Yildiz 2012) of an international workplace. [less ▲]

Detailed reference viewed: 31 (0 UL)
Peer Reviewed
See detailWhich Factors Play a Role in Coco Issuance? Evidence from European Banks.
Wolff, Christian UL

Scientific Conference (2022, June 20)

Detailed reference viewed: 14 (1 UL)
Full Text
Peer Reviewed
See detailBackscatter-Aided NOMA V2X Communication under Channel Estimation Errors
Khan, Wali Ullah UL; Jamshed, Muhammad Ali; Mahmood, Asad UL et al

Scientific Conference (2022, June 20)

Backscatter communications (BC) has emerged as a promising technology for providing low-powered transmissions in nextG (i.e., beyond 5G) wireless networks. The fundamental idea of BC is the possibility of ... [more ▼]

Backscatter communications (BC) has emerged as a promising technology for providing low-powered transmissions in nextG (i.e., beyond 5G) wireless networks. The fundamental idea of BC is the possibility of communications among wireless devices by using the existing ambient radio frequency signals. Non-orthogonal multiple access (NOMA) has recently attracted significant attention due to its high spectral efficiency and massive connectivity. This paper proposes a new optimization framework to minimize total transmit power of BC-NOMA cooperative vehicle-to-everything networks (V2XneT) while ensuring the quality of services. More specifically, the base station (BS) transmits a superimposed signal to its associated roadside units (RSUs) in the first time slot. Then the RSUs transmit the superimposed signal to their serving vehicles in the second time slot exploiting decode and forward protocol. A backscatter device (BD) in the coverage area of RSU also receives the superimposed signal and reflect it towards vehicles by modulating own information. Thus, the objective is to simultaneously optimize the transmit power of BS and RSUs along with reflection coefficient of BDs under perfect and imperfect channel state information. The problem of energy efficiency is formulated as non-convex and coupled on multiple optimization variables which makes it very complex and hard to solve. Therefore, we first transform and decouple the original problem into two sub-problems and then employ iterative sub-gradient method to obtain an efficient solution. Simulation results demonstrate that the proposed BC-NOMA V2XneT provides high energy efficiency than the conventional NOMA V2XneT without BC. [less ▲]

Detailed reference viewed: 51 (15 UL)
Full Text
Peer Reviewed
See detailWhen RIS Meets GEO Satellite Communications: A New Sustainable Optimization Framework in 6G
Khan, Wali Ullah UL; Lagunas, Eva UL; Mahmood, Asad UL et al

Scientific Conference (2022, June 19)

Reflecting intelligent surfaces (RIS) is a low-cost and energy-efficient solution to achieve high spectral efficiency in sixth-generation (6G) networks. The basic idea of RIS is to smartly reconfigure the ... [more ▼]

Reflecting intelligent surfaces (RIS) is a low-cost and energy-efficient solution to achieve high spectral efficiency in sixth-generation (6G) networks. The basic idea of RIS is to smartly reconfigure the signal propagation by using passive reflecting elements. On the other side, the demand of high throughput geostationary (GEO) satellite communications (SatCom) is rapidly growing to deliver broadband services in inaccessible/insufficient covered areas of terrestrial networks. This paper proposes a GEO SatCom network, where a satellite transmits the signal to a ground mobile terminal using multicarrier communications. To enhance the effective gain, the signal delivery from satellite to the ground mobile terminal is also assisted by RIS which smartly shift the phase of the signal towards ground terminal. We consider that RIS is mounted on a high building and equipped with multiple re-configurable passive elements along with smart controller. We jointly optimize the power allocation and phase shift design to maximize the channel capacity of the system. The joint optimization problem is formulated as nonconvex due to coupled variables which is hard to solve through traditional convex optimization methods. Thus, we propose a new optimal algorithm which is based on Mesh Adaptive Direct Search to obtain an efficient solution. Simulation results unveil the benefits of RIS-assisted SatCom in terms of system channel capacity. [less ▲]

Detailed reference viewed: 59 (18 UL)
See detailJewish History and the Politics of Digitisation
Zaagsma, Gerben UL

Scientific Conference (2022, June 17)

Detailed reference viewed: 13 (0 UL)
Full Text
Peer Reviewed
See detailClimate Risk and Price Jumps
Lehnert, Thorsten UL

Scientific Conference (2022, June 13)

Detailed reference viewed: 31 (0 UL)
See detailStudying transnational events through web archives
Schafer, Valerie UL

Scientific Conference (2022, June 13)

This presentation was an update of the work of WG2 related to web archives and transnational events I'm leading within the WARCnet project.

Detailed reference viewed: 35 (1 UL)
Peer Reviewed
See detailInteractions in joint multiliteracies activities in three day care centres in Luxembourg
Kirsch, Claudine UL

Scientific Conference (2022, June 12)

Several countries have implemented multilingual programmes in early childhood education, trilingual Luxembourg being one of them. Since 2017 professionals in formal and non-formal (e.g. crèches ... [more ▼]

Several countries have implemented multilingual programmes in early childhood education, trilingual Luxembourg being one of them. Since 2017 professionals in formal and non-formal (e.g. crèches) institutions have to develop language skills in Luxembourgish /French, familiarise children with French/ Luxembourgish and value their home languages, for instance through literacy activities and common activities with parents. Many practitioners, however, are unsure of how to develop literacy in one, let alone multiple languages, and many rarely collaborate with parents. The longitudinal mixed-method research project COMPARE therefore aims to develop and explore multiliteracy and collaborative practices in the non-formal ECEC sector. The paper presents the literacy events in which parents and educators collaboratively engaged three-year-olds in three crèches in 2020-2021. The analysis of the video-recorded observations shows that the range and number of activities as well as the parents’ language use depended on the crèches. Parents tended to read and tell stories, frequently in a (prestigious) home language, and sing songs. The parent-led activities in these crèches reflected, to some extent, the pedagogical practices that 452 professionals reported in an online questionnaire completed in 2020 (Kirsch & Aleksić, 2021). We argue that collaboration with parents can propel the use of home languages in crèches and develop multiliteracy practices, but educators need to be aware of language hierarchies and have a good understanding of literacy. [less ▲]

Detailed reference viewed: 25 (2 UL)
See detailTagungs-Resümee
Reicher, Ruth UL

Scientific Conference (2022, June 11)

Detailed reference viewed: 24 (1 UL)
Full Text
Peer Reviewed
See detailWhen Cryptographic Ransomware Poses Cyber Threats: Ethical Challenges and Proposed Safeguards for Cybersecurity Researchers
Botes, Wilhelmina Maria UL; Lenzini, Gabriele UL

Scientific Conference (2022, June 10)

Cryptographic ransomware, a malware capable of destroying data, is a serious threat if used against providers of critical infrastructures such as healthcare, energy supply chains, banking services, and ... [more ▼]

Cryptographic ransomware, a malware capable of destroying data, is a serious threat if used against providers of critical infrastructures such as healthcare, energy supply chains, banking services, and transport systems. Used as such, ransomware may qualify as cyber weapon, but the current discussion around cyber and information warfare is not sufficiently legally regulated. This delegates the safe governance thereof to the application of ethical principles but leaves researchers working on ransomware in doubt about the double-use nature of their work and what code of conduct to follow. Although some existing biomedical research ethical principles have been repurposed for ICT research, in the context of recent threats posed by ransomware attacks, these efforts need an urgent rethink, especially when it involves the research of cybersecurity researchers dealing specifically with ransomware. This paper does not offer solutions, but rather describes the complexity, nature and extent of ethical challenges raised by cybersecurity research and invites the cybersecurity research community to enter into active discussions around the need to consider the development of an appropriate research ethics framework in the domain of cybersecurity. [less ▲]

Detailed reference viewed: 57 (1 UL)
Full Text
See detailHEAT AND MASS TRANSFER BETWEEN XDEM & OPENFOAM USING PRECICE COUPLING LIBRARY
Adhav, Prasad UL; Besseron, Xavier UL; Estupinan Donoso, Alvaro Antonio UL et al

Scientific Conference (2022, June 09)

This work demonstrates the rapid development of a simulation environment to achieve Heat and Mass Transfer (HMT) between Discrete Element Methods (DEM) and Computa- tional Fluid Dynamics (CFD). The HMT ... [more ▼]

This work demonstrates the rapid development of a simulation environment to achieve Heat and Mass Transfer (HMT) between Discrete Element Methods (DEM) and Computa- tional Fluid Dynamics (CFD). The HMT coupling can be employed to simulate processes such as drying, pyrolysis, combustion, melting, solid-fluid reactions etc and have indus- trial applications such as biomass furnaces, boilers, heat exchangers, and flow through packed beds. This shows that diverse CFD features and solvers need to be coupled with DEM in order to achieve various applications mentioned above. The proposed DEM-CFD Eulerian-Lagrangian coupling for heat and mass transfer is achieved by employing the preCICE coupling library[1] on volumetric meshes. In our prototype, we use the eXtended Discrete Element Method (XDEM)[2] for handling DEM calculations and OpenFOAM for the CFD. The XDEM solver receives various CFD data fields such as fluid properties, and flow conditions exchanged through preCICE, which are used to set boundary conditions for particles. Various heat transfer and mass transfer laws have been implemented in XDEM to steer HMT source term computations. The heat and mass source terms computed by XDEM are transferred to CFD solver and added as source. These source terms represent particles in CFD. The generic coupling interface of preCICE, XDEM and its adapter allows to tackle a di- verse range of applications. We demonstrate the heat, mass & momentum coupling capa- bilities through various test cases and then compared with our legacy XDEM-OpenFOAM coupling and experimental results. [less ▲]

Detailed reference viewed: 277 (13 UL)
Full Text
Peer Reviewed
See detailTélétravail et mobilités dans un contexte transfrontalier
Pigeron-Piroth, Isabelle UL

Scientific Conference (2022, June 09)

La Grande Région SaarLorLux se caractérise par d’intenses flux de travailleurs frontaliers qui représentent près d’un quart des flux de travail frontalier de l’ensemble de l’UE. La pandémie de Covid-19 et ... [more ▼]

La Grande Région SaarLorLux se caractérise par d’intenses flux de travailleurs frontaliers qui représentent près d’un quart des flux de travail frontalier de l’ensemble de l’UE. La pandémie de Covid-19 et le confinement total débuté en mars 2020 ont eu pour conséquence de développer le recours massif au télétravail y compris dans cet espace traversé par plusieurs frontières. Cette plongée brutale et soudaine dans le télétravail a attiré l’attention sur cette forme d’organisation du travail, assez peu utilisée et étudiée jusqu’alors. La question se pose désormais de voir comment va évoluer cette forme de travail dans un contexte transfrontalier, compte tenu des multiples règlementations en vigueur (fiscales, sécurité sociale…), par ailleurs diverses selon les pays concernés (de travail comme de résidence). Le débat a notamment été relancé avec la récente résolution européenne déposée à l’Assemblée Nationale française visant à l’augmentation du télétravail des travailleurs frontaliers et à mener une réflexion européenne sur leur statut (texte adopté n°819). Il importe alors de tenir compte des effets du télétravail sur les travailleurs frontaliers en place mais aussi sur les évolutions du travail frontalier. Doit-on s’attendre à une forte hausse du travail frontalier si le télétravail se généralise ? Comment seront alors impactées les mobilités des frontaliers ? L’objectif de la présente communication est de dresser une liste des effets potentiels du télétravail sur les mobilités (quotidiennes et résidentielles) dans un contexte transfrontalier. Comment le télétravail peut-il impacter les pratiques de mobilités des frontaliers ? constitue-t-il une solution envisageable et réaliste face aux problèmes de congestion autour du Luxembourg ? ou y a-t-il des effets-rebonds qui nuanceraient cet impact du télétravail sur les mobilités? Autant de questions qui constituent une étape préliminaire avant toute tentative de mesure ou de prise en compte de l’effet télétravail dans l’analyse du marché du travail transfrontalier dans la Grande Région. Méthodologie En partant d’une analyse de la littérature sur le sujet, souvent abordé de manière « nationale » donc sans tenir compte des particularités liées aux frontières, nous complèterons ce tour d’horizon par nos propres travaux sur la question et notre connaissance du contexte transfrontalier. Principaux résultats obtenus ou attendus Une réflexion générale sera engagée quant aux effets attendus du télétravail sur les mobilités transfrontalières, à la fois au niveau macro, meso et micro. Il importera de distinguer les impacts sur les travailleurs frontaliers déjà en place et sur ceux qui sont potentiellement candidats à un emploi transfrontalier, mais aussi de tenir compte du fait que tous les emplois ne sont pas télétravaillables par exemple (selon le secteur ou le type d’emploi). Cet inventaire détaillé nous permettra de conclure sur l’intérêt de la prise en compte de la variable télétravail dans les futures analyses du travail frontalier, mais également nous fournira des pistes d’études concrètes à réaliser. [less ▲]

Detailed reference viewed: 127 (3 UL)
Full Text
Peer Reviewed
See detailA survey of EMI lecturer training programmes: content, delivery, ways forward.
Deroey, Katrien UL

Scientific Conference (2022, June 09)

This talk will provide insights into designing and delivering English Medium Instruction (EMI) lecturer training by surveying published initiatives worldwide (Deroey, 2021). Although EMI is not a recent ... [more ▼]

This talk will provide insights into designing and delivering English Medium Instruction (EMI) lecturer training by surveying published initiatives worldwide (Deroey, 2021). Although EMI is not a recent phenomenon, many higher education institutions are only now beginning to organize specific support for EMI lecturers. EAP practitioners are often tasked with providing such support, since the perception commonly is that language is the main issue requiring improvement. However, the efficient design and delivery of EMI lecturing training and support is a complex challenge. First, most literature highlights the need for pedagogical and communication training in addition to language work. Second the varied EMI context means training should be adapted to the local cultural, educational, linguistic and institutional contexts (Herington, 2020; Martinez & Fernandes, 2020; Tuomainen, 2018). 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 working with what are usually 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. Having surveyed the main components, formats and work forms of the programmes, the conclusion highlights ways forward in EMI lecturer training that emerge from this analysis. References 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). 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 (pp. 245-253). Garnet. 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). 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). 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). 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. [less ▲]

Detailed reference viewed: 75 (0 UL)
Full Text
Peer Reviewed
See detailUnsupervised Learning for User Scheduling in Multibeam Precoded GEO Satellite Systems
Ortiz Gomez, Flor de Guadalupe UL; Lagunas, Eva UL; Chatzinotas, Symeon UL

Scientific Conference (2022, June 09)

Future generation SatCom multibeam architectures will extensively exploit full-frequency reuse schemes together with interference management techniques, such as precoding, to dramatically increase ... [more ▼]

Future generation SatCom multibeam architectures will extensively exploit full-frequency reuse schemes together with interference management techniques, such as precoding, to dramatically increase spectral efficiency performance. Precoding is very sensitive to user scheduling, suggesting a joint precoding and user scheduling design to achieve optimal performance. However, the joint design requires solving a highly complex optimization problem which is unreasonable for practical systems. Even for suboptimal disjoint scheduling designs, the complexity is still significant. To achieve a good compromise between performance and complexity, we investigate the applicability of Machine Learning (ML) for the aforementioned problem. We propose three clustering algorithms based on Unsupervised Learning (UL) that facilitate the user scheduling decisions while maximizing the system performance in terms of throughput. Numerical simulations compare the three proposed algorithms (K-means, Hierarchical clustering, and Self-Organization) with the conventional geographic scheduling and identify the main trade-offs. [less ▲]

Detailed reference viewed: 93 (21 UL)
Full Text
Peer Reviewed
See detailDevelopment of an HPC Multi-Physics Biomass Furnace Simulation and Integration in a Cloud-based Workflow
Besseron, Xavier UL; Henrik, Rusche; Peters, Bernhard UL

Scientific Conference (2022, June 09)

Biomass combustion offers a credible alternative to reduce the consumption of fossil fuels. To optimize the biomass combustion process and improve the design of biomass furnaces numerical simulation is a ... [more ▼]

Biomass combustion offers a credible alternative to reduce the consumption of fossil fuels. To optimize the biomass combustion process and improve the design of biomass furnaces numerical simulation is a less expensive and time-effective approach as opposed to the experimental method. However, the combustion in a biomass furnace involves intricate physical phenomena that must be modeled (and validated) carefully, in the fuel bed (with particle motion and shrinking, heat transfer, drying, pyrolysis, gasification) and in the surrounding gas (with turbulence, combustion, radiation). With this level of complexity, and to be conducted in a reasonable time, the simulation of industrial biomass furnaces requires the use of High-Performance Computing (HPC) platforms and expertise, which is usually not affordable for manufacturing SMEs. To address this issue, we developed a configurable digital twin of a biomass furnace running on HPC and we designed a cloudified easy-to-use end-to-end workflow. This fully automated workflow, from user input to results analysis, has been integrated into the digital marketplace of the CloudiFacturing EU project and is now directly available to SMEs via a Cloud portal. With this presentation, we want to offer a glance at the internal details and enabling technologies used in our parallel coupled application and scientific workflow. Our parallel simulation tool for biomass furnaces combines OpenFOAM (for the gas phase) parallelized with MPI and XDEM (for the solid wood particles) parallelized with OpenMP. The two libraries are coupled in parallel using an original approach based on the co-located partitioning strategy which has been tailored to minimize communications. As for the cloud workflow, it is based on an all-in-one Singularity image containing all the software, scripts, and data required to prepare the simulation input, execute the computation-intensive simulation, and analyze the results. Finally, we present the lessons learned from the development of this complex workflow and highlight the remaining challenges related to HPC multi-physics coupled simulations. [less ▲]

Detailed reference viewed: 48 (12 UL)
See detailDigital Storytelling: Strategies and Tools for Doing History Online
Camarda, Sandra UL

Scientific Conference (2022, June 08)

Detailed reference viewed: 17 (2 UL)
Full Text
Peer Reviewed
See detailA CutFEM Method for a Mechanistic Modelling of Astrocytic Metabolism in 3D Physiological Morphologies
Farina, Sofia UL; Voorsluijs, Valerie UL; Claus, Susanne et al

Scientific Conference (2022, June 07)

Investigating neurodegenerative diseases can be done complementary through biological and computational experiments. A good computational approach describing a simplification of the reality and focusing ... [more ▼]

Investigating neurodegenerative diseases can be done complementary through biological and computational experiments. A good computational approach describing a simplification of the reality and focusing only on some features of the problem can help getting insights on the field. The question addressed in our work is the role of astrocytes in neurodegeneration. These cells have two interesting characteristics that we want to investigate in our model: first, their role as metabolic mediator between neurons and blood vessels and second, their peculiar morphology. In fact, metabolic dysfunctions and morphological changes have been noticed in astrocyte affected by neuropathology. Computationally the main difficulty arising from solving a metabolic model into cellular shape comes from the complexity of the domain. The shape of astrocytes are very ramified, with thin branches and sharp edges. As shown in our previous work \cite{Farina}, a \cutfem{} \cite{Burman} approach is a suitable tool to deal with this issue. In our latest work we use real human three-dimensional astrocyte morphologies obtained via microscopy \cite{Salamanca} as domain to solve our system. The performed simulations highlight the effect of morphological changes on the system output. Suggesting that our model can be crucial in understanding the morphological-dependency in neuropathologies and that the spatial component cannot be neglected. [less ▲]

Detailed reference viewed: 63 (6 UL)
See detailImaging-informed BIOmechanical brain tumor forecast MOdelling
Abbad Andaloussi, Meryem UL; Husch, Andreas UL; Urcun, Stephane UL et al

Scientific Conference (2022, June 06)

Grade 3 and 4 Astrocytomas are high grade gliomas (HGG) that usually result from initially less aggressive low grade gliomas (LGG) through malignant transformation (MT). This process has various ... [more ▼]

Grade 3 and 4 Astrocytomas are high grade gliomas (HGG) that usually result from initially less aggressive low grade gliomas (LGG) through malignant transformation (MT). This process has various definitions in the literature, clinical and histopathological, depending on the scale of the study and researchers' interest. We introduce an overview of different aspects of MT: molecular, clinical and the role of the microenvironment in acquiring the malignant phenotype. Furthermore, we introduce a new hypothesis that could explain the spatial progression of low grade astrocytoma (LGA) during MT. The former hypothesis will next be tested on LGA patients through tumor segmentation from Medical Resonance Images (MRI) and a mechanistic growth model. [less ▲]

Detailed reference viewed: 44 (2 UL)
Full Text
See detailUsing Bayes factors to compare dynamical models of hydrological systems
Mingo Ndiwago, Damian UL; Nijzink, Remko; Ley, Christophe UL et al

Scientific Conference (2022, June 05)

Detailed reference viewed: 37 (10 UL)
Full Text
See detailLatent classes of workplace bullying exposure and perpetration and their links to personality, power and social status
Sischka, Philipp UL

Scientific Conference (2022, June 03)

Just like many school aggression researchers (see the review of studies in Olivier et al., 2021; Smith & Steffgen, 2013), many scholars investigating workplace bullying assume the existence of four ... [more ▼]

Just like many school aggression researchers (see the review of studies in Olivier et al., 2021; Smith & Steffgen, 2013), many scholars investigating workplace bullying assume the existence of four classes of employees: Uninvolved employees, victims, perpetrator, and provocative victims (also called ‘bully-victims’; e.g., Zapf & Einarsen, 2020). Yet, empirical evidence supporting these four classes is lacking so far. Instead, studies on workplace bullying mostly focused solely on the victim perspective (Einarsen et al., 2020; see also the review of studies in Gupta et al., 2020), while far less studies investigate the perpetrator perspective (see the enumerated studies in Nielsen & Einarsen, 2018). Only some studies include both perspectives (e.g., Baillien et al., 2016; Fernández-del-Río et al., 2021; Sischka et al., 2021). However, these studies applied a variable-centered approach and treated workplace bullying exposure and perpetration as separate variables. Thus, they tell us little about the interplay of workplace bullying exposure and perpetration. The current study employs a person-centered approach (i.e., latent class analysis) to identify groups of employees that show different patterns of workplace bullying involvement. Moreover, the current study aims to identify predictors of latent class membership. We investigate the individual disposition hypothesis (Nielsen & Einarsen, 2018), assuming that individual characteristics such as personality traits may be related to being involved in bullying and could therefore be typifying features of workplace bullying groups. Moreover, according to some researchers in workplace bullying, individual characteristics such as certain personality traits (big five dimensions, trait aggression, dominance) are particularly appropriate to identify and distinguish workplace bullying subgroups (Matthiesen & Einarsen, 2007; see also Nielsen et al., 2017). On the other hand, power and social status represent enabling structures (Salin, 2003) of workplace bullying, and power imbalance is often seen as a defining feature of workplace bullying (Einarsen et al., 2020). To test our hypotheses, we recruited participants via Amazon’s Mechanical Turk (MTurk; Buhrmester et al., 2011; Crump et al., 2013) to participate in an online survey. The final sample contained 1,492 respondents (53.8% females, n = 802), with ages ranging from 19 to 77 (M = 40.2, SD = 10.8). Most respondents worked full time (91.2%, n = 1,360). The survey contained the Short-Negative Acts Questionnaire (S-NAQ; Notelaers et al., 2019) that was applied from the victim as well as from the perpetrator perspective. Furthermore, we assessed the big five with the Mini-IPIP (Donnellan et al., 2006), trait aggression with the brief aggression questionnaire (Webster et al., 2014), and dominance with the domineering subscale of the Inventory of Interpersonal Problems (Soldz et al., 1995). Moreover, power and social status were assessed with a newly developed bipartite measure of social hierarchy (Yu et al, 2019). Latent class analysis was employed. Statistical fit indices, substantive interpretability and utility, as well as classification diagnostics were jointly considered to determine the number of workplace bullying classes. To explore the relationships between the latent categorical variable and the other variables (i.e., personality traits, power and social status), we followed the three-step procedure (e.g., Asparouhov & Muthén, 2014). Latent class analysis revealed four classes, i.e., (1) mild bullying involvement, (2) bully-victims (3) non-involved and (4) victims. These classes were meaningfully linked with the big five dimensions, trait aggression, dominance, power and social status. Specifically, bully-victims scored high on extraversion, neuroticism, trait aggression, dominance, power and low on status, agreeableness, conscientiousness and openness. Victims on the other hand scored also high on neuroticism and – compared with non-involved – lower on agreeableness, conscientiousness and openness and higher on trait aggression and dominance. Victims showed the lowest levels of extraversion and status. The present study implements a cross-sectional design precluding a causal interpretation. Moreover, only self-reported measures were employed. Thus, especially indicators of workplace bullying perpetration might be influence by social desirability. Scholars and policy makers need to be aware of different patterns of being involved in workplace bullying in order to create effective interventions. Personality factors as well as power and social status are important correlates of workplace bullying involvement. The current study is the first that investigates workplace bullying from a target and a perpetrator perspective by employing a person-centered approach (i.e., latent class analysis). [less ▲]

Detailed reference viewed: 20 (2 UL)
See detail"Hybrid is the new normal." Einblicke in die Projekte des Luxembourg Centre for Contemporary and Digital History am Beispiel der virtuellen Ausstellungen ww1.lu, zeitschichten.be und minett-stories.lu
Brüll, Christoph UL

Scientific Conference (2022, June 03)

Seinen Forschungsschwerpunkt in der digitalen Geschichte trägt das 2017 gegründete C²DH bereits im Namen. Überlegungen zu den methodologischen Herausforderungen des Digitalen für die ... [more ▼]

Seinen Forschungsschwerpunkt in der digitalen Geschichte trägt das 2017 gegründete C²DH bereits im Namen. Überlegungen zu den methodologischen Herausforderungen des Digitalen für die Geschichtswissenschaft stehen bei seiner Arbeit genauso im Mittelpunkt wie das Nachdenken über den Einsatz digitaler Mittel bei der Vermittlung von Zeitgeschichte. Bei dieser Digital Public History spielen besonders die so genannten virtuellen Ausstellungen eine große Rolle. Der Vortrag bettet diese in einem ersten Teil in die konzeptionelle Ausrichtung des C²DH ein, bevor im zweiten Teil drei Ausstellungen vorgestellt werden: zum Ersten Weltkrieg in Luxemburg (2018), zur Geschichte Ostbelgiens seit 1920 (2020) und zur Sozial- und Industriegeschichte im luxemburgisch-französischen Grenzgebiet (2022). Besondere Aufmerksamkeit kommt der Problematisierung der Nutzung von Archivquellen in diesen Ausstellungen zu – sowohl im Zusammenspiel mit anderen (v.a. audiovisuellen) Quellen als auch aus methodischer und didaktischer Perspektive. [less ▲]

Detailed reference viewed: 74 (1 UL)
Full Text
Peer Reviewed
See detailComparing MaaS Business Plans Using an Agent Based Modelling Approach
Cisterna, Carolina UL; Viti, Francesco UL; Bigi, Federico UL

Scientific Conference (2022, June 02)

The Mobility-as-a-service is based on customized bundles in which different mobility services are gathered under one subscription-based digital platform. Currently, in the literature MaaS packages have ... [more ▼]

The Mobility-as-a-service is based on customized bundles in which different mobility services are gathered under one subscription-based digital platform. Currently, in the literature MaaS packages have been customized and hypothesized through surveys and pilot projects, underlining the lack of a model able to capture and compare MaaS business plans when different bundles are provided. This study aims to simulate different MaaS plans in the users’ mode choice set using an agent-based model and to study the MaaS potential demand heterogeneity. Results show that MaaS users who experience long daily travel times are indifferent to the type of package provided, while time-limited package members substitute the car by travelling longer distances using public transport and free-floating car-sharing services. In contrast, the trip-discounted bundle members are less willing to substitute the car and they use public transport within a long trip chain, reducing their trip time [less ▲]

Detailed reference viewed: 23 (0 UL)
Full Text
Peer Reviewed
See detailExploring the History of Digital History: Setting an Agenda
Zaagsma, Gerben UL

Scientific Conference (2022, June 02)

See attached.

Detailed reference viewed: 44 (1 UL)
Full Text
Peer Reviewed
See detailSignal-Oriented ECUs in a Centralized Service-Oriented Architecture: Scalability of the Layered Software Architecture
Bengtsson, Hoai Hoang; Hiller, Martin; Migge, Jörn et al

Scientific Conference (2022, June 01)

The industry is quickly moving away from a function/signal-oriented architecture towards Service-Oriented Architectures (SOA). To carry-over legacy signal-oriented ECUs during the transition phase, Volvo ... [more ▼]

The industry is quickly moving away from a function/signal-oriented architecture towards Service-Oriented Architectures (SOA). To carry-over legacy signal-oriented ECUs during the transition phase, Volvo Cars has developed a layered software (SW) architecture based on the concepts of "device proxys" (i.e., one per legacy ECU), signal real-time database and service interface. This architecture, executing on the central computer on the TSN backbone, provides a clear separation of concerns between its components with a reduced additional complexity. In this presentation, we will review the main challenges faced in the integration of signal-oriented ECUs into SOA, and present the solutions explored at Volvo with a focus on layered SW architecture in the centralized E/E architecture and its 3 core components: o Device Proxies o Signal DataBase o Service Interface We then report on the performances of this architecture in terms of latencies and conclude on the maximum number of signal-oriented frames and legacy ECUs that can be handled. The performance evaluation is conducted by simulation, with sensitivity analysis to identify the performance bottlenecks. The E/E architecture under study is a prototype TSN-based central computing architecture targeted at next-generation models. The main questions that will be discussed throughout the presentation are 1) how to efficiently handle signal to service conversion? 2) The performance and the scalability of the SW architecture proposed and 3) the suitability of SOME/IP as the SOA protocol. [less ▲]

Detailed reference viewed: 103 (2 UL)
Peer Reviewed
See detailUnlocking web archives through metadata, seed lists and derived data
Clavert, Frédéric UL; Schafer, Valerie UL

Scientific Conference (2022, June 01)

This presentation addresses the use, re-use, access and dissemination of data related to web archives. Web archives (Brügger, 2018) have been for several years in a hybrid position regarding access ... [more ▼]

This presentation addresses the use, re-use, access and dissemination of data related to web archives. Web archives (Brügger, 2018) have been for several years in a hybrid position regarding access, depending on the institutions that were preserving them. While Internet Archive has made its collections available online since 2001 through the Wayback Machine (but with limited features for scholars willing to conduct a distant reading based on data, WARC files, etc.), most national libraries only allowed an onsite access due to authors rights restrictions (and in some cases the frame of legal deposits), while starting to provide interesting metadata for research projects willing to explore them. However, the situation is currently evolving in the frame of several research projects that allow to access a vast amount of (international) metadata and datasets. Taking two research projects in progress as case studies, WARCnet and AWAC2, this paper aims to present the move towards the use of metadata and derived data related to huge collections of web archives of the COVID crisis. WARCnet (Web ARChive studies network researching web domains and events) is a network whose activities (funded by the Independent Research Fund Denmark | Humanities (grant no 9055-00005B)) run in 2020-2023. The networking activities are guided by overarching research questions, one of them being “How transnational events developed on the European web?” (and notably the COVID crisis which is explored in WG2 (https://cc.au.dk/en/warcnet/working-groups)). AWAC2 (Analysing Web Archives of the COVID Crisis through the IIPC Novel Coronavirus dataset) is a project part of the Archives Unleashed Cohort Program, that supports and facilitates research engagement with web archives. It aims to explore a unique collection of web material (https://archive-it.org/collections/13529) related to the pandemic, with contributions from over 30 members of IIPC (International Internet Preservation Consortium) as well as public nominations from over 100 individuals/institutions. May it be in terms of access or tools, both projects are currently exploring new methodologies based on broad datasets (i.e. 5,3 TB for the IIPC collection related to the COVID crisis; 9.4 GB and 8,738,751 lines for the CSV related to plain text webpages). Starting with the WARCnet project, the presentation will explain how its WG2 gathered and accessed several national European datasets of COVID web archives, their specificities as well as their heterogeneity, the first analysis conducted through a datathon on January- February 2021 (Aasman et al. 2021) and the limits and assets of such access. Within the AWAC2 project (2021-2022) the access to the international IIPC COVID collection, through Archive-It and through the cohort program developed by the Archives Unleashed Team (Netpreserve, 2021; Ruest et al., 2021), is then a new opportunity to access data through mediated interfaces (ARCH) and to go further into them. Here again the presentation will demonstrate new opportunities and show a few examples of the analysis conducted by the team. Both examples aim to present the way web archiving institutions, libraries and researchers are developing new ways of accessing and exploring web archives, while also increasing their value(s) (Schafer and Winters, 2021). References Aasman, S., Bingham, N., Brügger, N., de Wild, K., Gebeil S. & Schafer V. (2021). Chicken and Egg: Reporting from a Datathon Exploring Datasets of the COVID- 19 Special Collections, WARCnet paper, Aarhus, https://cc.au.dk/fileadmin/dac/Projekter/WARCnet/Aasman_et_al_Chicken_and_Egg.pdf Brügger, N. (2018). The Archived Web. Doing History in the Digital Age. Cambridge, MA: The MIT Press. IIPC (2021), A Retrospective with the Archives Unleashed Project, netpreserve blog, https://netpreserveblog.wordpress.com/2021/04/01/a-retrospective-with-the-archives-unleashed-project/ Ruest, N., Fritz, S., Deschamps, R. Lin, J. & Milligan, I. (2021) From archive to analysis: accessing web archives at scale through a cloud-based interface. International Journal of Digital Humanities, https://paperity.org/p/260049927/from-archive-to-analysis-accessing-web-archives-at-scale-through-a-cloud-based-interface Schafer V. & Winters J. (2021). The values of web archives, International Journal of Digital Humanities, 1-10, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8190571/ [less ▲]

Detailed reference viewed: 150 (1 UL)
Peer Reviewed
See detailComparison of UVC and Solar-based Processes for the Simultaneous Removal of Microcontaminants and Microorganism from Urban Wastewater Effluents I.
Salmeron Garcia, Irene UL; Sánchez-Montes, Isaac; Ruiz-Delgado, Ana et al

Scientific Conference (2022, June)

Currently, the presence of microcontaminats (MCs) and pathogens in secondary municipal wastewater treatment plant effluents entails a challenge to be addressed before water discharge or reuse. In this ... [more ▼]

Currently, the presence of microcontaminats (MCs) and pathogens in secondary municipal wastewater treatment plant effluents entails a challenge to be addressed before water discharge or reuse. In this work UVC (UVC/S2O82-, UVC/H2O2) and solar-based processes (solar/S2O82- and solar/H2O2) are proposed as tertiary treatments for the simultaneous removal of both, MCs and pathogens, comparing their efficiency aiming to find the most suitable solution. The microorganisms studied were Escherichia coli, Enterococcus faecalis and Salmonella enteritidis in a concentration of 103 CFU mL-1 each and a mixture of 6 MCs (acetaminophen, caffeine, carbamazepine, trimethoprim, sulfamethoxazole and diclofenac) each at 100 μg L-1 of initial concentration, using simulated wastewater treatment plant effluent as water matrix. The concentrations of oxidants studied were 25 and 50 mg L-1 of each, respectively. Results revealed that UVC/H2O2 at 25 mg L-1 presented the most satisfactory solution considering treatment time and addition of reagents for complete inactivation of target pathogens and 80% removal of the sum of MCs. [less ▲]

Detailed reference viewed: 83 (2 UL)
Full Text
Peer Reviewed
See detailHyaku: A Qualitative Negotiation-Through-Interaction Interface to Support Runners in Achieving Balanced Training Sessions
Restrepo, Juan; Vos, Steven; Verhagen, Evert et al

Scientific Conference (2022, June)

Detailed reference viewed: 38 (0 UL)
Peer Reviewed
See detailMulticultural conviviality in the context of active ageing in Luxembourg
Albert, Isabelle UL; Hoffmann, Martine; Vandenbosch, Petra et al

Scientific Conference (2022, June)

Luxembourg’s population has not only become more culturally diverse in the past years but is also growing older. Almost 20 per cent of the total population of Luxembourg is over 60 years old, of which one ... [more ▼]

Luxembourg’s population has not only become more culturally diverse in the past years but is also growing older. Almost 20 per cent of the total population of Luxembourg is over 60 years old, of which one third are non-Luxembourgers. Active ageing can make an important contribution to the quality of life of older people and promote social inclusion, whereas the feeling of not belonging can be a psychological barrier to participation in activities. This was the starting point of the PAN-VAL project on active ageing of Luxembourgers and non-Luxembourgers, which was funded by the Luxembourg Ministry of Family and Integration and carried out in collaboration between a team from the University of Luxembourg and GERO – Kompetenzzenter fir den Alter. A total of N = 1000 people over 50 (51% women, 49% men) participated in a nationally representative online and telephone survey, and a number of n = 39 in-depth qualitative interviews were carried out with participants from four selected municipalities in different parts of the Grand Duchy: Differdange in the south, Mersch in the centre and Ettelbrück and Clervaux in the north. Based on our quantitative data, we will first present a model on the relations between sense of belonging, social inclusion, loneliness and participation in social activities. Drawing on our qualitative interviews, we will further analyze how the participants describe the processes how they developed a sense of belonging to the places they live in through mundane encounters with people from their municipalities and neighborhoods. We will also explore, how older people experience conviviality with regard to the offers for active ageing, focusing in particular on barriers and facilitators for participation in such offers. Policy implications and lessons learnt about how to adapt social offers to the diverse needs of an increasingly heterogeneous target group will be discussed. [less ▲]

See detailDie zweifache Rechtfertigung des ‚Bösewichts‘: Figurationen des Bösen bei Schiller
Kohns, Oliver UL

Scientific Conference (2022, June)

Detailed reference viewed: 35 (0 UL)
Full Text
Peer Reviewed
See detailReal-Time Large Deformation Simulations Using Probabilistic Deep Learning Framework
Saurabh, Deshpande; Jakub, Lengiewicz; Stephane, Bordas

Scientific Conference (2022, June)

Detailed reference viewed: 38 (12 UL)
Full Text
See detailFormation design of an inter-satellite link demonstration mission
Menzio, Davide; Mahfouz, Ahmed UL; Dalla Vedova et al

Scientific Conference (2022, June)

The problem of secular growth of the inter-satellite induced by the J2 perturbations has been widely exploredin the literature. In this paper, we study the influence of altitude and initial mean anomaly ... [more ▼]

The problem of secular growth of the inter-satellite induced by the J2 perturbations has been widely exploredin the literature. In this paper, we study the influence of altitude and initial mean anomaly of the chief on theinter-satellite distance growth in a classical trailing formation. Mean elements are converted into osculatingones and then in Cartesian coordinates that are propagated together in the ECI frame. Preliminary resultsshows that zonal harmonics are responsible for a steep distance drift when the formation is inserted inthe vicinity of ±45 and ±135 degrees of mean anomaly in a polar orbit. Distance-invariant solutions aredetermined in term of the mean anomaly and characterized in terms of the difference between the averagerelative distance and the initial one and of the amplitude of the osculating distance. Finally, after the inter-satellite distance has grown to an unacceptable level, the electric thruster onboard of the deputy spacecraftis leveraged in order to reset the deputy’s orbit to the distance invariant mean elements. A finite-time LinearQuadratic Regulator (FTLQR) is designed and validated within a high-fidely dynamics framework [less ▲]

See detailKonzept, Methodik und Perspektiven eines digitalen historischen Stadtatlas - das Beispiel Luxemburg
Uhrmacher, Martin UL

Scientific Conference (2022, June)

The historical atlas of the city of Luxembourg has been accessible on the internet since 2019. Since then, it has been continuously expanded, revised and improved, both technically and in terms of content ... [more ▼]

The historical atlas of the city of Luxembourg has been accessible on the internet since 2019. Since then, it has been continuously expanded, revised and improved, both technically and in terms of content. Users currently have the opportunity to view a large number of historical old maps and aerial photographs from Luxembourg archives for the period between 1560 and 2017 at zoom levels of their choice and to compare them with each other on transparent layers, precisely fitting one above the other. In addition, historical photos and views as well as explanatory texts on the city's history and on selected buildings or other infrastructure elements can be displayed. In order to realise the advantages of a web publication in the best possible way, the Luxatlas is based on open source software. This enables the development of customised WebGIS applications for the specific requirements of the project.In addition to the project presentation, the presentation will also highlight the methodological and source-critical challenges and put them up for discussion. [less ▲]

Detailed reference viewed: 45 (1 UL)
Full Text
Peer Reviewed
See detailDesigning for Qualitative Interfaces: Experiences from Studio Education
Lockton, Dan; Lallemand, Carine UL; Menheere, Daphne

Scientific Conference (2022, June)

Detailed reference viewed: 47 (0 UL)
Full Text
See detailRelative State Estimation for LEO Formations with Large Inter-satellite Distances Using Single-Frequency GNSS Receivers
Mahfouz, Ahmed UL; Menzio, Davide; Dalla Vedova, Florio et al

Scientific Conference (2022, June)

Relative baseline estimation is an integral part of satellite formation flying missions. GNSS-based relativepositioning has been a dominating technology for formation missions in LEO, where very precise ... [more ▼]

Relative baseline estimation is an integral part of satellite formation flying missions. GNSS-based relativepositioning has been a dominating technology for formation missions in LEO, where very precise estimatescould be obtained for formations with small inter-satellite distances (1 − 10 km). Larger baselines betweenthe satellites (> 10 km) pose the problem of considerable differences in the ionospheric delays experiencedby the signals received by each receiver. This problem could be mitigated by using precise ionospheric-freecombinations that could only be obtained by dual-frequency receivers, which is not a cost-efficient optionfor modern low-cost miniature missions. In this paper, the problem of relative baseline vector estimation isaddressed for formation missions with large inter-satellite distances equipped with single-frequency receivers.The problem is approached using the space-proven relatively simple Extended Kalman Filter with anadvantageous setting for the observation vector [less ▲]

Peer Reviewed
See detailFeasibility of Advanced Oxidation Processes as an upgrade for Microcontaminants removal at municipal Wastewater Treatment Plants
Salmeron Garcia, Irene UL; Nunez Tafalla, Paula UL; Venditti, Silvia UL et al

Scientific Conference (2022, June)

Benzotriazole, carbamazepine, clarithromycin and diclofenac have been identified as microcontaminants of concern in Luxembourgish wastewaters, thus the implementation of photo-Fenton processes at natural ... [more ▼]

Benzotriazole, carbamazepine, clarithromycin and diclofenac have been identified as microcontaminants of concern in Luxembourgish wastewaters, thus the implementation of photo-Fenton processes at natural pH has been proposed for their removal. In the present work, the effectiveness of a pilot scale photo-Fenton system (500W Medium Pressure) has been evaluated according to the reagent dosage and toxicity of the treated effluent. With this treatment, 80% degradation is achieved in 15 minutes even with 5 and 3 mg/L of iron (40 mg/L H2O2), but 5 mg/L can have a negative effect on the growth of Sorghum saccharatum in Phytotoxicity tests. In comparison UV-C/H2O2 (40W Low Pressure; 40 mg/L H2O2) process needs longer treatment time and generates degradation by-products causing a growth inhibition of Sorghum saccharatum. The combination of both lamps can lead to a better performance of the reagents allowing to reach the 80% target in less time and to reduce the dosage. [less ▲]

Detailed reference viewed: 73 (7 UL)
Full Text
Peer Reviewed
See detailEvaluating Mobility Service Providers’ Strategies in an Activity-Based Supernetwork
Bandiera, Claudia UL; Connors, Richard UL; Viti, Francesco UL

Scientific Conference (2022, June)

A Mathematical Problem with Equilibrium Constraints (MPEC) is formulated to capture the relationships between multiple Mobility Service Providers (MSPs) and the users of a multimodal transport network ... [more ▼]

A Mathematical Problem with Equilibrium Constraints (MPEC) is formulated to capture the relationships between multiple Mobility Service Providers (MSPs) and the users of a multimodal transport network. The network supply structure is represented as a supernetwork where users’ daily activity chains are represented sequentially and their modal choices to reach different destinations are based on the mobility services active in each connection. At the upper level, a profit maximization formulation is introduced to describe MSPs’ behaviour. At the lower level, groups of users choose the routes with the lowest cost, according to Wardrop’s first equilibrium principle. Due to non-separable interactions between supernetwork links, the equilibrium conditions defining users travel behaviour are written as Variational Inequality (VI). Finally, a numerical example is presented in order to show the characteristics of the model when car-sharing, bus and private car are available in the network. [less ▲]

Detailed reference viewed: 18 (0 UL)
Full Text
See detailAnalysis of GNSS sensed slant wet delay during severe weather events in central Europe
Hunegnaw, Addisu UL; Duman, Hüseyin; Elgered, Gunnar et al

Scientific Conference (2022, May 26)

Over the last few decades, anthropogenic greenhouse gas emissions have increased the frequency of climatological anomalies such as temperature, precipitation, and evapotranspiration. It is noticed that ... [more ▼]

Over the last few decades, anthropogenic greenhouse gas emissions have increased the frequency of climatological anomalies such as temperature, precipitation, and evapotranspiration. It is noticed that the frequency and severity of the intense precipitation signify a greater susceptibility to flash flooding. Flash flooding continues to be a major threat to European cities, with devastating mortality and considerable damage to urban infrastructure. As a result, accurate forecasting of future extreme precipitation events is critical for natural hazard mitigation. A network of ground-based GNSS receivers enables the measurement of integrated water vapour along slant pathways providing three-dimensional water vapour distributions. This study aims to demonstrate how GNSS sensing of the troposphere can be used to monitor the rapid and extreme weather events that occurred in central Europe in June 2013 and resulted in flash floods and property damage. We recovered one-way slant wet delay (SWD) by adding GNSS post-fit phase residuals, representing the troposphere's higher-order inhomogeneity. Nonetheless, noise in the GNSS phase observable caused by site-specific multipath can significantly affect the SWD from individual satellites. To overcome the problem, we employ a suitable averaging strategy for stacking post-fit phase residuals obtained from the PPP processing strategy to generate site-specific multipath corrections maps (MPS). The spatial stacking is carried out in congruent cells with an optimal resolution in elevation and azimuth at the local horizon but with decreasing azimuth resolution as the elevation angle increases. This permits an approximately equal number of observations allocated to each cell. The spatio-temporal fluctuations in the SWD as measured by GNSS closely mirrored the moisture field associated with severe weather events in central Europe, i.e., a brief rise prior to the main rain events, followed by a rapid decline once the storms passed. Furthermore, we validated the one-way SWD between ground-based water-vapour radiometry (WVR) and GNSS-derived SWD for different elevation angles. [less ▲]

Detailed reference viewed: 35 (2 UL)
See detailA Cybersecurity Incident: Who You Gonna Call?
Schmitz, Sandra UL

Scientific Conference (2022, May 25)

Detailed reference viewed: 33 (1 UL)
Peer Reviewed
See detail“Use”: When personas become real users…
Clavert, Frédéric UL; Schafer, Valerie UL

Scientific Conference (2022, May 24)

Building upon our experience with ARCH, our study related to the IIPC Novel Coronavirus collection, as well as upon the first months of research we conducted as a cohort team in the Archives Unleashed ... [more ▼]

Building upon our experience with ARCH, our study related to the IIPC Novel Coronavirus collection, as well as upon the first months of research we conducted as a cohort team in the Archives Unleashed Project, we will provide feedback related to users’ needs and achievements. Ian Milligan distinguished in his paper “You shouldn’t Need to be a Web Historian to Use Web Archives: Lowering Barriers to Access Through Community and Infrastructure” (WARCnet paper, Aarhus, 2020), three personas: a computational humanist, a digital humanist, and a conventional historian. As an heterogeneous team, mirroring in some ways the personas distinguished by Ian Milligan, we will underline the successes and failures we experienced, the technical layers and levels we unfolded, our experience of collective work which also needs to take interdisciplinarity and heterogeneity (of technical skills, interests, availability, digital literacy) into account, the value of mentorship and our iterative process with data and research questions. We will finally shortly discuss the many pros and few cons in lowering barriers to access web archives (e.g. How to make access easiest without hiding the complexity of web archives?). [less ▲]

Detailed reference viewed: 42 (0 UL)
See detailLes archives du Web, des sources aux données
Schafer, Valerie UL

Scientific Conference (2022, May 20)

This keynote during Humanistica 2022 aimed to retrace 15 years of evolution of web archiving and web archives' studies. It also presented some research projects like the current Hivi, WARCnet and AWAC2 ... [more ▼]

This keynote during Humanistica 2022 aimed to retrace 15 years of evolution of web archiving and web archives' studies. It also presented some research projects like the current Hivi, WARCnet and AWAC2 projects. [less ▲]

Detailed reference viewed: 39 (0 UL)
Peer Reviewed
See detailL'émission de radio "100 Jahre Ostbelgien"
Brüll, Christoph UL; Fickers, Andreas UL

Scientific Conference (2022, May 20)

Detailed reference viewed: 42 (1 UL)
Full Text
Peer Reviewed
See detailDie unfreien Befreiten. Über die lange Heimkehr der sowjetischen ZwangsarbeiterInnen aus Luxemburg.
Ganschow, Inna UL

Scientific Conference (2022, May 17)

Inna Ganschow untersucht in ihrem Vortrag die verschiedenen Typen totaler Institutionen im Sinne Erving Goffmans auf dem Weg von ZwangsarbeiterInnen aus der Sowjetunion nach Luxemburg und zurück. Von den ... [more ▼]

Inna Ganschow untersucht in ihrem Vortrag die verschiedenen Typen totaler Institutionen im Sinne Erving Goffmans auf dem Weg von ZwangsarbeiterInnen aus der Sowjetunion nach Luxemburg und zurück. Von den nationalsozialistischen Durchgangs- und Kriegsgefangenenlagern über die luxemburgischen Werk- und Ostarbeiterlager bis hin zu den sowjetischen Sammel- und Filterlagern endete die lange Reise nach Hause oft nach einigen Monaten oder Jahren erneut in einem Lager oder einer Zwangsansiedlung. Die Repatriierung junger ukrainischer, weißrussischer und russischer Frauen wird anhand von erhaltenen Dokumenten aus erster Hand, verschiedenen Lager- und Betriebsunterlagen sowie Augenzeugenberichten rekonstruiert. Die Rückführung wird im Hinblick auf ihre Funktion analysiert, die eine Bestrafung, eine Belohnung oder ein Schutz sein konnte. [less ▲]

Detailed reference viewed: 32 (0 UL)
Full Text
Peer Reviewed
See detailLuxembourg – navigating the transition to the knowledge economy. A historical perspective
Danescu, Elena UL

Scientific Conference (2022, May 13)

Luxembourg is a multicultural, multilingual and cross-border area par excellence that has always sought to maintain an openness to its neighbours, both for reasons of security and to give itself access to ... [more ▼]

Luxembourg is a multicultural, multilingual and cross-border area par excellence that has always sought to maintain an openness to its neighbours, both for reasons of security and to give itself access to larger markets. Despite its small geographical area, limited workforce and lack of natural resources, Luxembourg is currently first out of 196 countries worldwide in terms of GDP/capita (with 114 370 €/capita, representing 260% of the EU average).Thanks to a long-term strategic vision, political and institutional innovation and structural changes implemented in economy throughout the 20th century, the once bipolar agricultural/industrial society has become a competitive society based largely on knowledge-intensive services and centred on the financial sector, characterised by high-performing human capital, political stability, prosperity and a strong welfare system.Taking this observation as a starting point, adopting a comparative and interdisciplinary perspective and drawing on a wide range of European and international archive and institutional sources, the paper sets out to address the following research questions: what are the factors of change and the major challenges facing Luxembourg in the digital transition? What institutions and governance is it using to tackle these challenges? What are the risks, benefits and opportunities of this transformation over the long term? What are the country’s strengths in terms of competitiveness, and what are the weaknesses that might jeopardise its comparative advantages? What is the impact of digitalisation on the public sector and on the government’s links with business and the public at large? [less ▲]

Detailed reference viewed: 70 (0 UL)
See detailThe NIS 2.0 Directive - Lessons learnt or lagging behind? A legal perspective
Schmitz, Sandra UL

Scientific Conference (2022, May 10)

Detailed reference viewed: 183 (0 UL)
See detailTable ronde : Quel avenir pour la Revue Belge d'Histoire contemporaine ?
Auwers, Michael; Dubois, Sébastien; Tyssens et al

Scientific Conference (2022, May 09)

Detailed reference viewed: 19 (0 UL)
Full Text
See detailScanning the Past: A 3D Model of Trausch's Library
Teferle, Felix Norman UL; Wieneke, Lars UL; Parvaz, Shahoriar UL et al

Scientific Conference (2022, May 05)

Today, modern geospatial technologies and methods are widely used in combination with the documentation and preservation of objects of importance to cultural heritage. In this setting, archeologists and ... [more ▼]

Today, modern geospatial technologies and methods are widely used in combination with the documentation and preservation of objects of importance to cultural heritage. In this setting, archeologists and historians alike benefit from the rapid technological developments over the past decades, which have resulted in instrumentation that allows the capture of real objects and the generation of accurate and precise three-dimensional (3D) digital representations, i.e. models, from these sensed data. Here, the object of interest is the villa of the late historian Professor Gilbert Trausch with its library, for which a virtual library should be created for the general public. The building is an 19th century townhouse located on Limpertsberg in the City of Luxembourg and contains a cellar, three floors as well as a loft. Of particular interest were the cellar, stair cases, the first (the location of Professor Trausch’s office) and second floors as most of the bookshelves are situated there. In line with state-of-the-art approaches for 3D building modelling, a broad spectrum of modern geospatial technologies including classical surveying, Global Navigation Satellite System (GNSS), digital close-range photogrammetry and terrestrial laser scanning were employed to capture the Villa Trausch and its 33 bookshelves, i.e. Trausch’s Library, in all its details, while providing all data in one homogeneous coordinate system. Models and more photo-realistic visualizations of the exterior and interior have been obtained using, e.g., indoor images captured during the scanning. These allowed us to explore different virtual reality (VR) pathways employed by the gaming industry, for the generation of a first VR experience of the building in the sense of a digital museum. Currently solutions for the development of a public virtual library using commercial providers are investigated. [less ▲]

Detailed reference viewed: 60 (6 UL)
Full Text
Peer Reviewed
See detail"Do we need an entire course about it?": Evaluating two years of teaching HCI in computer science
Rohles, Björn UL; Doublet, Sophie UL; Bongard, Kerstin UL et al

Scientific Conference (2022, May 01)

Educators increasingly agree on the importance of teaching Human-Computer Interaction (HCI) to Computer Science (CS) students, but there is debate on how to best integrate HCI into CS curricula ... [more ▼]

Educators increasingly agree on the importance of teaching Human-Computer Interaction (HCI) to Computer Science (CS) students, but there is debate on how to best integrate HCI into CS curricula. Unfortunately, standard course evaluations typically do not provide sufficient insights for improving HCI classes. In the present article, we used a human-centered design approach to evaluate our HCI classes, building on a qualitative study with CS students from four introductory HCI classes over two years. We report on a qualitative assessment through interviews, photo elicitation and sentence completion. Specifically, we addressed four research questions: which contents were the most relevant, how students experienced the courses, how they view the role of HCI in CS, and which outcomes they perceived from the HCI courses. We gathered rich qualitative insights beyond the standard course evaluations and derived concrete enhancements for future course iterations. We discuss implications for other HCI educators and contribute recommendations for the living HCI curriculum. Furthermore, we reflect on the usefulness of our methodological approach to collect in-depth constructive feedback from students. [less ▲]

Detailed reference viewed: 51 (4 UL)
See detailSpatio-Temporal Rainfall Estimation from Communication Satellite Data using Graph Neural Networks
Krebs, Julian UL; Mishra, Kumar Vijay; Gharanjik, Ahmad et al

Scientific Conference (2022, May)

Detailed reference viewed: 37 (2 UL)
Full Text
See detailIntersectional inequalities in science
Kozlowski, Diego UL

Scientific Conference (2022, April 28)

Detailed reference viewed: 18 (0 UL)
Full Text
Peer Reviewed
See detailThe Luxembourg Financial Ecosystem and the European Monetary Innovation. Cas Study on KBL, LuxSE and EIB (1957-1990)
Danescu, Elena UL; Cheng, Anqi

Scientific Conference (2022, April 26)

The Luxembourg international financial centre developed considerably during the 1960s, propelled by several factors including concerted government policy, flexible regulation and a willingness to harness ... [more ▼]

The Luxembourg international financial centre developed considerably during the 1960s, propelled by several factors including concerted government policy, flexible regulation and a willingness to harness opportunities at international level (such as the 1963 US interest equalisation tax and the Bundesbank provisions introduced in 1968 and 1974). The decision to establish various Community institutions (the ECSC High Authority in 1952) and European funding institutions (the European Investment Bank in 1968) in the country also had a decisive impact. The currency union with Belgium (BLEU, 1921) and the absence of a Luxembourg Central Bank made these developments all the more significant. Drawing on archives and oral history sources, this paper aims to illustrate the complexity and originality that characterised the development of the conceptual, political and regulatory context in Luxembourg in the 1960s-1990s, in what can be seen as a sui generis experiment and preparation for EMU. It will explore the changing financial ecosystem in Luxembourg and the collaborative efforts by its main stakeholders (banks, regulatory authorities, individuals, networks) - with a focus on KBL, LuxSE and EIB - to encourage financial and monetary innovation (via the EUA, ECU, and Eurco) before the introduction of the European single currency and to pave the way for the establishment and consolidation of the euro [less ▲]

Detailed reference viewed: 72 (1 UL)
Full Text
Peer Reviewed
See detailRKHS Based State Estimator for Radar Sensor in Indoor Application
Kumar Singh, Uday UL; Shankar, Bhavani; Alaee, Mohammad

Scientific Conference (2022, April 23)

For the estimation of targets’ states (location, velocity, and acceleration) from nonlinear radar measurements, usually, the improved version of well known Kalman filter: extended Kalman filter (EKF) and ... [more ▼]

For the estimation of targets’ states (location, velocity, and acceleration) from nonlinear radar measurements, usually, the improved version of well known Kalman filter: extended Kalman filter (EKF) and unscented Kalman filter (UKF) are used. However, EKF and UKF approximates the nonlinear measurement function either by Jacobian or using sigma points. Consequently, because of the approximation of the measurement function, the EKF and UKF cannot achieve high estimation accuracy. The potential solution is to replace the approximation of nonlinear measurement function with its estimate, obtained in high dimensional reproducing kernel Hilbert space (RKHS). An ample amount of research has been done in this direction, and the combined filter is termed RKHS based Kalman filter. However, there is a shortage of literature dealing with estimating the dynamic state of the target in an indoor environment using RKHS based Kalman filter. Therefore, in this paper, we propose the use of RKHS based Kalman filter for indoor application. Specifically, we validate the suitability of the RKHS based Kalman filtering approach using simulations performed over three different target motion models. [less ▲]

Detailed reference viewed: 51 (6 UL)
Peer Reviewed
See detailThe positional value of education in the Americas: dynamics of inequality in labour market returns for highly unequal countries, 2000-2019
Ceron, Francisco UL; Chauvel, Louis UL

Scientific Conference (2022, April 22)

The article examines how the labour market value of education has changed in the context of the expansion of higher education. However, one drawback is understanding how it generates differences between ... [more ▼]

The article examines how the labour market value of education has changed in the context of the expansion of higher education. However, one drawback is understanding how it generates differences between high and low-skilled labour markets, particularly in contexts of high inequality and informality. This could be linked to specific mechanisms by which employers value educational credentials as signalled skills. Using the Luxembourg Income Study (LIS), we analyse trends over two decades in 11 American countries. Our results confirm the previous results for the claim that education has become increasingly positional, compared with the absolute model of education. However, we find that the relative gains in wages for workers with higher levels of education, as the pool of higher education graduates expand over time, increased only slightly in high-skilled occupations, while their relative gains decreased for lower-skilled occupations. This trend is present in both absolute and positional models of education. Moreover, when looking at the structure of labour markets in terms of the linkage between educational credentials and occupational groups, we higher the tertiary education specificity of occupations, the higher the earnings for workers with advantaged positions. These findings are consistent with processes of displacement of low-skilled workers due to increasing competition among highly educated workers, from the positional model of education. [less ▲]

Detailed reference viewed: 67 (3 UL)
Peer Reviewed
See detailAcademic Profile Development: An Investigation of Differentiation Processes Based on Students' Achievement and Grade Level
Breit, Moritz; Brunner, Martin; Fischbach, Antoine UL et al

Scientific Conference (2022, April 21)

Academic achievement profiles affect students’ further development, i.e., by informing educational and professional choices. However, there is a lack of knowledge on the mechanisms behind the development ... [more ▼]

Academic achievement profiles affect students’ further development, i.e., by informing educational and professional choices. However, there is a lack of knowledge on the mechanisms behind the development of academic profiles. For research on cognitive ability profiles, specifically differentiation processes, statistical tools have been developed. In the present article, we transfer these methods for differentiation research to academic achievement data. We examine differentiation depending on students’ general level of achievement and grade level in a large Luxembourgish student sample. Students’ achievements in German, French, and Math were assessed within the Luxembourg school monitoring program. We found more balanced academic profiles with increasing achievement level. We further found more balanced profiles with increasing grade level and a positive interaction effect. [less ▲]

Detailed reference viewed: 75 (0 UL)
Full Text
See detailA new R package for Finite Mixture Models with an application to pension systems
Schiltz, Jang UL; Noel, Cédric

Scientific Conference (2022, April 20)

Detailed reference viewed: 32 (3 UL)
Full Text
Peer Reviewed
See detailTranslanguaging pedagogy and creative activism for preschool teachers, parents, and children
Aleksic, Gabrijela UL

Scientific Conference (2022, April 18)

Today’s education is impacted by the fast changes that can be very challenging for teachers, parents, and students. The need of pedagogies that will support them to navigate through these changes and ... [more ▼]

Today’s education is impacted by the fast changes that can be very challenging for teachers, parents, and students. The need of pedagogies that will support them to navigate through these changes and challenges, becomes evident, especially in highly linguistically and culturally diverse countries such as the small trilingual Grand-Duchy of Luxembourg. One of such pedagogies is translanguaging pedagogy. While translanguaging refers to the natural use of entire linguistic repertoire of bi/multilingual people, translanguaging pedagogy helps teachers to use bi/multilingual students’ unique linguistic repertoires to foster learning, comprehension, and academic achievement (Otheguy, García, & Reid, 2015). In Luxembourg, there are 64 % of four-year old children who not speak Luxembourgish at home (MENJE, 2018). Therefore, in 2017, multilingual early education has become mandatory obliging teachers to help students to develop Luxembourgish, familiarize them with French, and value their home languages. Thus, in order to support teachers’ work, there were three objectives of the present project : (1) to administer an 18-hours professional development (PD) course in translanguaging pedagogy to 40 preschool teachers, (2) to actively include students’ families in order to straighten home-school collaboration, and (3) to support children’s linguistic, socio-emotional, and cognitive development and engagement in the classroom. The PD course was divided into seven sessions on multilingual ecology, home-school collaboration, multilingual brain, and multilingual oracy and literacy, over 6 months. To evaluate the success of these aims, before and after the course, we employed teacher questionnaires, focus groups, and interviews with the teachers, parent questionnaires and interviews with the parents, and early literacy and numeracy tests in the school and home languages as well as video observations of classroom interactions with the students. Regarding the teachers, the results from the teacher questionnaire before and after the course, showed that there was a significant positive change in attitudes towards children’s multilingualism and their home languages. However, in the focus groups and the interviews, we identified that most of the teachers were open to the use children’s home languages only to develop the school language, Luxembourgish. In the analysis of the video observations of teacher/child interactions, we observed that when the home language of children was used, this immediately contributed to their well-being. However, we also observed that in some classrooms the use of children’s home languages was artificial; the teachers insisted on naming home languages instead of giving the children the opportunity to use the school language and be proud of it. Regarding the parents, the analysis of 65 questionnaires on children’s home literacy environment and the interviews showed that parental involvement is crucial for children’s linguistic and socio-emotional development. The interviewed parents shared that they would like to be more involved in the home-school collaboration but they did not know how. Although they were open for more collaboration, most of the parents thought that this should be initiated from the teachers. Finally, regarding the children, we observed the linguistic and socio-emotional development of 23 children (age 4) over one year. The children were tested in early literacy and numeracy, three times over the course of one year. When plotting the results, we identified that all children performed better in their home languages than in the school language and that there was a progress in both home and school language over one year. Furthermore, the video observations showed that when translanguaging pedagogy was used and children’s home languages were valued, children were more responsive and eager to learn and interact with others. Following these results and in order to connect teachers, parents, and children, I developed a website for teachers with the summary of important theories in multilingualism supported by many practical activities in the domain of multilingual classroom, home-school collaboration, and multilingual oracy and literacy. The website is in English, French, and German, and teachers can find a solid support for their work. Furthermore, I wrote two illustrated books for parents and children. In the illustrated book for parents the main character is a woman called Sumak who moved from another country as a refugee and is forced to learn a new language in a society she does not fit in. A storytelling workshop will allow teachers and parents to share their experience and connect on a deeper level. In the book for children, the main character is a girl called Mara who moved to a new country and does not understand the school language. She is sad and angry and tries to find solutions, for example, in music. The book contains a CD with in which the character Mara sings the song in Mara’s language, allowing teachers and children to hear that it is ok to speak in a language they do not understand. The illustrated books exist in English, French, Serbian, Portuguese, and German. These creations are an act of creative activism, which are “transformative interventions in order to change society for the better by communicating conflicts and/or solutions where no one else can or will in order to provoke reflection (and consequent behavioral changes)” (Harrebye, 2016, p. 25). Finally, this is an act of going beyond the horizons and the project results, and reimagining everything, especially playing with new ideas and applying those through specific creative acts that bring teachers, parents, and children together. The Conference will allow me to showcase these creative interventions, discuss their impact on the schools, and offer them to international researchers who work in education and beyond. References Ministry of National Education, Childhood and Youth [MENJE]. (2018). Les chiffres clés de l'Éducation nationale: statistiques et indicateurs - Année scolaire 2016-2017 [Key numbers of the national education: statistics and indicators – School year 2016-2017]. Retrieved from http://www.men.public.lu/fr/actualites/publications/themes-transversaux/statistiques-analyses/chiffres-cles/index.html Harrebye S.F. (2016) Creative activism today. In: Social change and creative activism in the 21st century. London: Palgrave Macmillan. Otheguy, R., García, O., & Reid, W. (2015). Clarifying translanguaging and deconstructing named langauges: A perspective from linguistics. Applied Linguistic Review, 6(3), 281–307. [less ▲]

Detailed reference viewed: 40 (1 UL)
Full Text
Peer Reviewed
See detailDifferential Phase Compensation in Over-the-air Precoding Test-bed for a Multi-beam Satellite
Martinez Marrero, Liz UL; Merlano Duncan, Juan Carlos UL; Querol, Jorge UL et al

Scientific Conference (2022, April 10)

This article presents a closed-loop differential phase compensation system for a precoding-enabled multibeam satellite forward link and its validation by live experiments on a GEO satellite scenario. The ... [more ▼]

This article presents a closed-loop differential phase compensation system for a precoding-enabled multibeam satellite forward link and its validation by live experiments on a GEO satellite scenario. The precoding operation avoids inter-beam interference and maximizes the spectrum efficiency by full frequency reuse as an alternative to the traditional two-color or four-color reuse methods proposed in the DVB-S2 standard. However, the satellite payload introduces differential phase and frequency impairments, which can degrade the precoding performance. This work describes the implementation of the differential phase and frequency tracking and compensation loop in an end-to-end testbed over a multibeam satellite system with independent local oscillators. The developed system performs end-to-end real-time communication over the satellite link, including channel measurements and precompensation. Results are validated by an over-the-air demonstration using two beams of the SES-14 multibeam satellite. Each beam is transmitted by independent transponders, which results in differential frequency and phase offsets due to the transponder undisciplined local oscillators. This phase offset makes it impossible to use precoding without the phase compensation loop. We prove that the implemented system can successfully track and compensate the differential phase and frequency to improve precoding performance. [less ▲]

Detailed reference viewed: 11 (1 UL)