References of "Scientific congresses, symposiums and conference proceedings"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailAI-based Question Answering Assistance for Analyzing Natural-language Requirements
Ezzini, Saad UL; Abualhaija, Sallam UL; Arora, Chetan UL et al

in In Proceedings of the 45th International Conference on Software Engineering (ICSE'23), Melbourne 14-20 May 2023 (in press)

Abstract—By virtue of being prevalently written in natural language (NL), requirements are prone to various defects, e.g., inconsistency and incompleteness. As such, requirements are frequently subject to ... [more ▼]

Abstract—By virtue of being prevalently written in natural language (NL), requirements are prone to various defects, e.g., inconsistency and incompleteness. As such, requirements are frequently subject to quality assurance processes. These processes, when carried out entirely manually, are tedious and may further overlook important quality issues due to time and budget pressures. In this paper, we propose QAssist – a question-answering (QA) approach that provides automated assistance to stakeholders, including requirements engineers, during the analysis of NL requirements. Posing a question and getting an instant answer is beneficial in various quality-assurance scenarios, e.g., incompleteness detection. Answering requirements-related questions automatically is challenging since the scope of the search for answers can go beyond the given requirements specification. To that end, QAssist provides support for mining external domain-knowledge resources. Our work is one of the first initiatives to bring together QA and external domain knowledge for addressing requirements engineering challenges. We evaluate QAssist on a dataset covering three application domains and containing a total of 387 question-answer pairs. We experiment with state-of-the-art QA methods, based primarily on recent large-scale language models. In our empirical study, QAssist localizes the answer to a question to three passages within the requirements specification and within the external domain-knowledge resource with an average recall of 90.1% and 96.5%, respectively. QAssist extracts the actual answer to the posed question with an average accuracy of 84.2%. Index Terms—Natural-language Requirements, Question Answering (QA), Language Models, Natural Language Processing (NLP), Natural Language Generation (NLG), BERT, T5. [less ▲]

Detailed reference viewed: 90 (4 UL)
Full Text
Peer Reviewed
See detailTriangular Intertwined Frequency Selective Surface
Vasquez-Peralvo, Juan Andres UL; Merlano Duncan, Juan Carlos UL; Chatzinotas, Symeon UL et al

in Vasquez-Peralvo, Juan Andres; Merlano Duncan, Juan Carlos; Chatzinotas, Symeon (Eds.) et al International symposium on antennas and propagation (in press)

This paper presents a frequency selective surface design and simulation using intertwined triangular structures. It has been discovered that by using the proposed tessellated intertwined lattice, the ... [more ▼]

This paper presents a frequency selective surface design and simulation using intertwined triangular structures. It has been discovered that by using the proposed tessellated intertwined lattice, the reduction of the resonance frequency of a frequency selective surface can be improved by 22.58% compared with other triangular structures. Additionally, this structure is used as a MEFSS to improve the miniaturization of the structure and obtain a compact, angular stable band-pass filter. The simulations presented in this paper have been obtained using CST Microwave Studio. [less ▲]

Detailed reference viewed: 24 (4 UL)
Full Text
Peer Reviewed
See detailWide-Beamwidth Circular Polarized Antenna for Diversity Combining Applications
Vasquez-Peralvo, Juan Andres UL; Merlano Duncan, Juan Carlos UL; Eappen, Geoffrey UL et al

in Vasquez-Peralvo, Juan Andres; Merlano Duncan, Juan Carlos; Eappen, Geoffrey (Eds.) et al Global Communications Conference, Rio de Janeiro, 4 - 9 December 2022 (in press)

This paper presents the design, simulation, and manufacturing of a right-hand circularly polarized antenna working in the frequency band 17.7-20.2 GHz with a beamwidth of 42.4$^\circ$ and 5.4$^\circ$ for ... [more ▼]

This paper presents the design, simulation, and manufacturing of a right-hand circularly polarized antenna working in the frequency band 17.7-20.2 GHz with a beamwidth of 42.4$^\circ$ and 5.4$^\circ$ for the H-plane and E-plane, respectively. The presented antenna is part of a set of three antennas, two high-gain antennas, and, presented in this paper, a low directive antenna used for reception. The application we describe in this paper combines the radio-frequency signals obtained from the O3b satellite constellation, using three antennas to apply path diversity later to reconstruct the original signal. Moreover, using an antenna with a beamwidth in one plane allows receiving two satellite signals at the same time, increasing by 3 dB the overall gain. The wide-band capabilities of the antenna are obtained using aperture coupling. In particular, the circular polarization of the antenna is generated using a truncated corner square patch. Further, a metasurface is placed at the top to enhance the axial ratio. Importantly, the simulation results obtained using CST Microwave Studio show that the antenna has a reflection coefficient below -10 dB and an axial ratio below -3 dB in the intended frequency range. [less ▲]

Detailed reference viewed: 50 (20 UL)
Full Text
Peer Reviewed
See detailConservazione e ricezione dei documenti pontifici in Italia settentrionale: il caso del monastero cistercense di Chiaravalle Milanese (secoli XII-XVI)
Salemme, Timothy UL

in Salemme, Timothy; Renault, Jean-Baptiste (Eds.) Conservation et réception des documents pontificaux par les Ordres religieux (XIe-XVe siècles). Actes du colloque international. Nancy, 12-13 décembre 2013 (in press)

Detailed reference viewed: 58 (2 UL)
Full Text
Peer Reviewed
See detailProject DragLiner: Harnessing plasma Coulomb drag for satellite deorbiting to keep orbits clean
Genzer, Maria; Janhunen, Pekka; Haukka, Harri et al

Scientific Conference (in press)

Detailed reference viewed: 27 (5 UL)
Full Text
Peer Reviewed
See detailLessons from Investment Treaty Arbitration
Garcia Olmedo, Javier UL

in Haslehner, Werner; Rust, Alexander; Kofler (Eds.) Alternative Dispute Resolution in Taxation (in press)

Detailed reference viewed: 29 (12 UL)
Full Text
Peer Reviewed
See detailDesigning and managing an online, personalised research writing course for postgraduates
Deroey, Katrien UL; Skipp, Jennifer

in Mcdiarmid, Carole (Ed.) Exploring pedagogical approaches in EAP teaching (in press)

This paper describes and evaluates a multidisciplinary, online research writing course for PhD students. First, we explain our course rationale and set-up. The core principles are personalised, self ... [more ▼]

This paper describes and evaluates a multidisciplinary, online research writing course for PhD students. First, we explain our course rationale and set-up. The core principles are personalised, self-regulated and peer learning, and the optimal use of class time. This is achieved through the following components: an e-coursebook developed in-house; tasks preparing students for the workshops; workshops; writing and reflection; peer review; and individual consultations. Next, we review participants’ feedback from course evaluation surveys. Many students liked the online format although most would prefer the peer review and discussion of theory to happen ‘offline’. A key finding for course efficacy is that students greatly valued working with their own examples in the workshops. They saw this and independent learning tasks as the greatest drivers of their writing development. They also benefited from multidisciplinary peer review. As regards the writing and reflection, all students chose to write on their own and the writing reflection tool was deemed ineffective. We furthermore discuss our (teachers’) perceptions of the affordances and challenges of this course format. On the one hand, it allows workshops to be devoted to collaborative tasks, reflection and data-driven learning. On the other hand, preparing such workshops is very time-consuming, while the multiple components and regular task submissions carry a heavy administrative burden. The paper concludes with how lessons learnt have been implemented into the current course configuration. [less ▲]

Detailed reference viewed: 23 (0 UL)
See detail« … Eripuit servus mihi vitam » - Représentations médiatiques de la violence et de la criminalité dans les provinces occidentales de l'Empire romain
Binsfeld, Andrea UL

in Amodio, Mara (Ed.) The imagery of violence in Roman society (I-VI cent.). Persistence, innovations and interrelations from the Roman to the Christian Empire (in press)

Detailed reference viewed: 144 (17 UL)
Full Text
Peer Reviewed
See detailLe quotidien d’un poilu de la première guerre mondiale sur Facebook : nouvelle forme de médiation, nouvelle expérience ?
Schall, Céline UL; Vilatte, Jean-Christophe

in Les mondes de la médiation culturelle (in press)

« En 2013, le Musée de la Grande Guerre du Pays de Meaux et l’agence de communication DDB ont élaboré une page Facebook d’un genre nouveau. Facebook 1914, le quotidien de la première guerre offre une ... [more ▼]

« En 2013, le Musée de la Grande Guerre du Pays de Meaux et l’agence de communication DDB ont élaboré une page Facebook d’un genre nouveau. Facebook 1914, le quotidien de la première guerre offre une forme de médiation a priori inédite pour un musée français. Elle présente l’histoire d’un personnage de fiction, Léon Vivien, qui raconte son quotidien lors de la première guerre mondiale, sur Facebook, comme si ce réseau social avait existé à cette époque. Cette contribution met en évidence certains des effets de sens de la page par une analyse sémiotique du dispositif et une analyse thématique de ses contenus. Nous questionnons ensuite cette « nouvelle » forme de médiation qui se dit « participante » et qui, en réalité, reste assez classique dans son contenu et sous-exploite le potentiel de Facebook. » [less ▲]

Detailed reference viewed: 135 (1 UL)
Full Text
Peer Reviewed
See detailDiscrete-Phase Sequence Design with Stopband and PSL Constraints for Cognitive Radar
Alaeekerahroodi, Mohammad UL; Kumar, Sumit UL; Mysore Rama Rao, Bhavani Shankar UL et al

in Proceedings of EuRAD 2020 (in press)

We present the design of discrete-phase sequences considering simultaneously the peak sidelobe level (PSL) and avoiding reserved frequency bands which are occupied by narrowband interferers or ... [more ▼]

We present the design of discrete-phase sequences considering simultaneously the peak sidelobe level (PSL) and avoiding reserved frequency bands which are occupied by narrowband interferers or communications. We use the coordinate descent framework and propose an algorithm to design discrete-phase sequences with spectral power suppressed in arbitrary bands and with low auto-correlation sidelobes in terms of PSL. Our proposed algorithm exploits fast Fourier transform and is, therefore, computationally efficient. The over-the-air experiments using implementation on software-defined radio show reasonable agreement with numerical simulations and feasibility for field-deployment [less ▲]

Detailed reference viewed: 128 (9 UL)
Full Text
Peer Reviewed
See detailDaMAT: A Data-driven Mutation Analysis Tool
Vigano, Enrico UL; Cornejo Olivares, Oscar Eduardo UL; Pastore, Fabrizio UL et al

in Proceedings of the 45th International Conference on Software Engineering (ICSE ’23) (in press)

We present DaMAT, a tool that implements data- driven mutation analysis. In contrast to traditional code-driven mutation analysis tools it mutates (i.e., modifies) the data ex- changed by components ... [more ▼]

We present DaMAT, a tool that implements data- driven mutation analysis. In contrast to traditional code-driven mutation analysis tools it mutates (i.e., modifies) the data ex- changed by components instead of the source of the software under test. Such an approach helps ensure that test suites appropriately exercise components interoperability — essential for safety-critical cyber-physical systems. A user-provided fault model drives the mutation process. We have successfully evalu- ated DaMAT on software controlling a microsatellite and a set of libraries used in deployed CubeSats. A demo video of DaMAT is available at https://youtu.be/s5M52xWCj84 [less ▲]

Detailed reference viewed: 59 (0 UL)
Full Text
Peer Reviewed
See detailThe Rallye Platform: Mobile Location-based Serious Games for Digital Cultural Heritage
Botev, Jean UL; Camarda, Sandra UL; Ohlhoff, Claude

in Proceedings of the 25th International Conference on Human-Computer Interaction (HCI International) (in press)

Detailed reference viewed: 39 (7 UL)
Full Text
Peer Reviewed
See detailAn (Un)Necessary Evil - Users’ (Un)Certainty about Smartphone App Permissions and Implications for Privacy Engineering
Bongard, Kerstin UL; Sterckx, Jean-Louis; Rossi, Arianna UL et al

in 2022 7th IEEE European Symposium on Security and Privacy Workshops (EuroSPW) (in press)

App permission requests are a control mechanism meant to help users oversee and safeguard access to data and resources on their smartphones. To decide whether to accept or deny such requests and make this ... [more ▼]

App permission requests are a control mechanism meant to help users oversee and safeguard access to data and resources on their smartphones. To decide whether to accept or deny such requests and make this consent valid, users need to understand the underlying reasons and judge the relevance of disclosing data in line with their own use of an app. This study investigates people’s certainty about app permission requests via an online survey with 400 representative participants of the UK population. The results demonstrate that users are uncertain about the necessity of granting app permissions for about half of the tested permission requests. This implies substantial privacy risks, which are discussed in the paper, resulting in a call for user-protecting interventions by privacy engineers. [less ▲]

Detailed reference viewed: 95 (15 UL)
Full Text
Peer Reviewed
See detailCurves over finite fields and moduli spaces
van der Geer, Gerard UL

in Curves over finite fields: past, present and future. (in press)

Detailed reference viewed: 34 (0 UL)
Peer Reviewed
See detailRecursive UE Localization for a Multi-RIS-Assisted Wireless System in an Obstacle-Dense Environment
Zhao, Sibo; Liu, Yuan UL; Wu, Linlong UL et al

Scientific Conference (in press)

Accurate user equipment (UE) localization in an obstacle-dense environment is quite challenging due to the insufficiency of line-of-sight (LoS) links. However, the reconfigurable intelligent surface (RIS ... [more ▼]

Accurate user equipment (UE) localization in an obstacle-dense environment is quite challenging due to the insufficiency of line-of-sight (LoS) links. However, the reconfigurable intelligent surface (RIS) has the potential for offering alternative RIS-assisted LoS links to refine the localization results. In this paper, a recursive localization scheme is proposed based on an iterative RIS selection strategy, with the help of prior knowledge of the propagation environment. And numerical results based on a geometry-based channel simulator in a typical composite urban environment exhibit the improvement of localization accuracy. [less ▲]

Detailed reference viewed: 49 (6 UL)
Full Text
Peer Reviewed
See detailLes archevêques de Milan face aux premières expériences seigneuriales: stratégies et positionnements (milieu XIIIe-début XIVe s.)
Salemme, Timothy UL

in Barralis, Christine (Ed.) L’évêque face à son métier. Actes du colloque international, Metz. 15-17 novembre 2017 (in press)

Detailed reference viewed: 43 (2 UL)
Full Text
Peer Reviewed
See detailBlockchain Governance: An Overview and Prediction of Optimal Strategies Using Nash Equilibrium
Khan, Nida UL; Ahmad, Tabrez; Patel, Anass et al

in 3rd AUE International Research Conference (in press)

Blockchain governance is a subject of ongoing research and an interdisciplinary view of blockchain governance is vital to aid in further research for establishing a formal governance framework for this ... [more ▼]

Blockchain governance is a subject of ongoing research and an interdisciplinary view of blockchain governance is vital to aid in further research for establishing a formal governance framework for this nascent technology. In this paper, the position of blockchain governance within the hierarchy of Institutional governance is discussed. Blockchain governance is analyzed from the perspective of IT governance using Nash equilibrium to predict the outcome of different governance decisions. A payoff matrix for blockchain governance is created and simulation of different strategy profiles is accomplished for computation of all Nash equilibria. We also create payoff matrices for different kinds of blockchain governance, which were used to propose novel mathematical formulae usable to predict the best governance strategy that minimizes the occurrence of a hard fork as well as predicts the behavior of the majority during protocol updates. [less ▲]

Detailed reference viewed: 305 (28 UL)
See detailLe dialogue entre les juges en matière de protection des droits de l'homme
Pelin Raducu, Ioana UL

in Menetrey, Séverine; Hess, Burkhard (Eds.) Les dialogues des juges en Europe (in press)

Dans cet article, nous allons mettre en exergue quelques aspects des arrêts récents provenant de la Cour de justice de l’UE (Akerberg Frasson, Melloni, Kamberaj)qui démontrent l’émergence d’un standard ... [more ▼]

Dans cet article, nous allons mettre en exergue quelques aspects des arrêts récents provenant de la Cour de justice de l’UE (Akerberg Frasson, Melloni, Kamberaj)qui démontrent l’émergence d’un standard propre de l’UE en matière des droits de l’homme. Cette tendance de la C.J.U.E. contredira le prescrit normatif découlant du « dialogue des juges » d’interprétation conforme à la jurisprudence de la C.E.D.H. avant que l’adhésion de l’UE à la Convention E.D.H. ne soit formellement acquise. [less ▲]

Detailed reference viewed: 143 (15 UL)
Full Text
Peer Reviewed
See detailVon Objekt- und Meta-Ebenen: Analyse der Softwareanforderungen computergestützter juristischer Entscheidungen
Adrian, Axel; Rapp, Max; Steen, Alexander UL

in Recht DIGITAL – 25 Jahre IRIS, Proceedings of the International Legal Informatics Symposium (IRIS 2022) (in press)

Die Interpretation und Anwendung von Gesetzestexten auf einem konkreten Lebenssachverhalt erfordert von menschlichen Experten ein hohes Maß an Wissen, Erfahrung und die Fähigkeit zahlreiche kontextuelle ... [more ▼]

Die Interpretation und Anwendung von Gesetzestexten auf einem konkreten Lebenssachverhalt erfordert von menschlichen Experten ein hohes Maß an Wissen, Erfahrung und die Fähigkeit zahlreiche kontextuelle Überlegungen anzustellen. Die Formalisierung und Automatisierung solch eines Prozesses in einem computergestützten Verfahren muss dies entsprechend reflektieren. Ausgehend von einer Fallstudie werden in dieser Arbeit erforderliche juridische Schritte der Rechtsanwendung identifiziert und verschiedenen Objekt- und Meta-Ebenen zugeordnet. Diese Zuordnung erlaubt eine abstrakte Analyse von Softwareanforderungen, die juristische Assistenzsysteme erfüllen müssen, um bei juristischen Fallentscheidungen unterstützen zu können. [less ▲]

Detailed reference viewed: 66 (1 UL)
Full Text
Peer Reviewed
See detailEnergy performance comparison of ventilation-based heating versus water-based heating systems in an efficient residential building
Shirani, Arsalan UL; Merzkirch, Alexander; Leyer, Stephan UL et al

in Fluid Dynamics & Material Processing (in press)

The application of air-based heating systems as a possible approach to reduce the construction costs in highly efficient residential buildings is becoming popular. Air-based heating systems have been well ... [more ▼]

The application of air-based heating systems as a possible approach to reduce the construction costs in highly efficient residential buildings is becoming popular. Air-based heating systems have been well-known for their usage in passive houses during the past three decades. Available studies on such systems tend mostly to focus only on comparing exhaust air heat pump technology with conventional systems in efficient buildings. Moreover, most of the existing studies ignore the usual presence of the electrical heaters as backup. Besides, a comprehensive study and comparison between different air-based heating system concepts is still missing. In this study, four different air-based heating system concepts separated by the type of heat source of heat pump for heating and domestic hot water are defined. These systems are compared to four conventional heating system, including floor heating and direct electrical system employing dynamic annual simulations. According to simulation results, the systems with floor heating have shown the best system efficiencies and the lowest energy demand in comparison to the other systems. The main reason for this was the lower supply temperatures of the floor heating systems. Between the air heating systems, the system equipped with an outdoor air heat pump showed a better energy performance than an exhaust air system. The main reason for this could be attributed to the power limitation of exhaust air heat pump systems. [less ▲]

Detailed reference viewed: 71 (3 UL)
Full Text
Peer Reviewed
See detailA Methodology for Handling Data Movements by Anticipation: Position Paper
Bleuse, Raphaël UL; Lucarelli, Giorgio; Trystram, Denis

in Euro-Par 2018 Workshops (in press)

The enhanced capabilities of large scale parallel and distributed platforms produce a continuously increasing amount of data which have to be stored, exchanged and used by various tasks allocated on ... [more ▼]

The enhanced capabilities of large scale parallel and distributed platforms produce a continuously increasing amount of data which have to be stored, exchanged and used by various tasks allocated on different nodes of the system. The management of such a huge communication demand is crucial for reaching the best possible performance of the system. Meanwhile, we have to deal with more interferences as the trend is to use a single all-purpose interconnection network whatever the interconnect (tree-based hierarchies or topology-based heterarchies). There are two different types of communications, namely, the flows induced by data exchanges during the computations, and the flows related to Input/Output operations. We propose in this paper a general model for interference-aware scheduling, where explicit communications are replaced by external topological constraints. Specifically, the interferences of both communication types are reduced by adding geometric constraints on the allocation of tasks into machines. The proposed constraints reduce implicitly the data movements by restricting the set of possible allocations for each task. This methodology has been proved to be efficient in a recent study for a restricted interconnection network (a line/ring of processors which is an intermediate between a tree and higher dimensions grids/torus). The obtained results illustrated well the difficulty of the problem even on simple topologies, but also provided a pragmatic greedy solution, which was assessed to be efficient by simulations. We are currently extending this solution for more complex topologies. This work is a position paper which describes the methodology, it does not focus on the solving part. [less ▲]

Detailed reference viewed: 158 (1 UL)
Full Text
Peer Reviewed
See detailAdvancing the Meet-in-the-Filter Technique: Applications to CHAM and KATAN
Biryukov, Alexei UL; Teh, Je Sen UL; Udovenko, Aleksei UL

in Smith, Benjamin; Wu, Huapeng (Eds.) Selected Areas in Cryptography (in press)

Recently, Biryukov et al. presented a new technique for key recovery in differential cryptanalysis, called meet-in-the-filter (MiF). In this work, we develop theoretical and practical aspects of the ... [more ▼]

Recently, Biryukov et al. presented a new technique for key recovery in differential cryptanalysis, called meet-in-the-filter (MiF). In this work, we develop theoretical and practical aspects of the technique, which helps understanding and simplifies application. In particular, we show bounds on MiF complexity and conditions when the MiF-enhanced attack may reach them. We present a method based on trail counting which allows to estimate filtering strength of involved rounds and perform consequent complexity analysis with pen and paper, compared to the computer-aided approach of the original work. Furthermore, we show how MiF can be combined with plaintext structures for linear key schedules, allowing to increase the number of attacked rounds or to reduce the data complexity. We illustrate our methods on block cipher families CHAM and KATAN and show best-to-date single-key differential attacks for these ciphers. [less ▲]

Detailed reference viewed: 34 (4 UL)
Full Text
Peer Reviewed
See detailA New Perspective on the Luxembourgish Genitive
Döhmer, Caroline UL

in Germanic Genitives (in press)

Detailed reference viewed: 492 (13 UL)
Full Text
Peer Reviewed
See detailL’exposition d’objets ou de collections de « marque » : cobranding, réécriture, réénonciation
Schall, Céline UL

in Laval, Sylvie (Ed.) Marques muséales : un espace public revisité ? (in press)

Le cobranding est une pratique habituelle du secteur marchand. Mais lorsque deux musées réalisent ensemble une exposition, peut-on parler de cobranding muséal ? Quelles en seraient les spécificités  ... [more ▼]

Le cobranding est une pratique habituelle du secteur marchand. Mais lorsque deux musées réalisent ensemble une exposition, peut-on parler de cobranding muséal ? Quelles en seraient les spécificités ? Quels effets peut avoir cette démarche sur la communication ou sur l’exposition ? Notamment, le musée d’accueil s’approprie-t-il simplement l’imaginaire et les valeurs de la marque invitée par un phénomène de « transfert » ? Pour répondre à ces questions, nous étudions trois expositions qui reprennent des objets ou collections de musées dont la marque est internationalement reconnue. L’analyse sémiotique des images de marque du musée d’accueil et du musée invité ainsi que l’analyse sémiopragmatique des expositions montrent l’impact de la présence d’une grande marque internationale sur l’exposition et réciproquement, l’impact de l’exposition sur l’image de marque du musée d’accueil. Plus qu’un simple cobranding, c’est une réécriture impliquant une réénonciation du discours et des valeurs portés par les marques qui est proposée à travers ces expositions. Le processus aboutit à la création de nouveaux espaces symboliques et d’expositions réflexives, avec plusieurs niveaux de lecture. [less ▲]

Detailed reference viewed: 255 (6 UL)
Full Text
See detailThermodynamic integration via Replica Exchange Hamiltonian Monte Carlo for faster sampling and model comparison
Mingo Ndiwago, Damian UL; Nijzink, Remko; Ley, Christophe UL et al

Scientific Conference (2023, April 24)

Detailed reference viewed: 49 (3 UL)
Peer Reviewed
See detailIntérêt de la participation des parents dans un modèle de Réponse à l’Intervention (RàI) ou dans un Système de Soutien à Paliers Multiples (SSPM) : une récension des écrits
Poncelet, Débora UL; Tinnes, Mélanie UL

Scientific Conference (2023, April 03)

Avec la démocratisation de l’enseignement et la multiplication des profils d’apprenants, l’institution scolaire a rapidement été confrontée à la nécessité d’étudier comment les besoins des élèves sont ... [more ▼]

Avec la démocratisation de l’enseignement et la multiplication des profils d’apprenants, l’institution scolaire a rapidement été confrontée à la nécessité d’étudier comment les besoins des élèves sont pris en compte par le système et comment les pratiques éducatives lui sont adaptées. C’est dans ce contexte qu’au début des années 2000, le modèle de réponse à l’intervention (RàI) a vu le jour. Il se définit comme une approche visant l’identification des élèves en difficulté et la mise en place d’une intervention ciblée sur les besoins de l’apprenant (Desrochers & Guay, 2020). Au fil des années, ce modèle RàI s’est intensifié et élargi à de nombreux domaines d’apprentissage mais aussi à la gestion du comportement des élèves. Cet élargissement du champ d’action initial a amené à renommer l’appellation de l’approche en Système de Soutien à Paliers Multiples (SSPM). Si la qualité de l’enseignement en classe et le soutien additionnel apporté aux élèves en difficulté semblent constituer le socle des interventions mobilisées dans le cadre du modèle RàI ou de l’approche en SSPM, il semble que l’engagement parental et la collaboration famille-école pourraient constituer un apport intéressant. En tant que premiers agents de socialisation de l’enfant et compte tenu de l’influence importante des familles sur la réussite développementale et éducative des enfants, la promotion de l’engagement parental et du partenariat famille-école présente un grand intérêt. Or, peu d’études ont, à ce jour, associé la facette famille à un modèle SSPM. Depuis plus de vingt années, l’engagement parental et le partenariat avec les parents constituent une thématique de recherche dont l’intérêt ne cesse de croître. Des synthèses récentes (par exemple, Axford et al., 2019 ; Englund et al., 2004 ; Kim et al., 2020, Roy & Giraldo-García, 2018 ; Huat See & Gorard, 2015), soulignent à quel point les relations école-famille ainsi que l’engagement parental peuvent avoir une influence significative et positive à la fois sur les performances scolaires mais aussi sur des variables conatives. Toutes ces études semblent converger vers le constat que la participation des parents a une influence positive sur la scolarité des élèves. Or, comme le rappellent Castro et al. (2015), ces études souffrent d’un manque d’homogénéisation des concepts à l’étude ; ce qui fait de la participation des parents un phénomène multiforme et multidimensionnel. En outre, il semble que peu d’études incluent un incitant à mettre en place une stratégie parentale particulière de soutien au cursus scolaire de l’enfant (Lawson, 2015). Cependant, il semble que l’école comme les familles se demandent quelles sont les façons les plus efficaces de collaborer pour optimiser les effets de l’engagement parental (Jeynes, 2012). Il apparait que le plus souvent les démarches et les actions sont davantage centrées sur l’école (Kanouté, 2006) qui tendent à placer les familles dans des rôles éducatifs mineurs (participation aux réunions de parents, par exemple). Toutefois, Garbacz et al. (2008) soutiennent qu’une approche d’implication parentale basée sur le partenariat favoriserait le renforcement des compétences des familles comme du personnel scolaire en identifiant et en soutenant les ressources des deux acteurs. Selon les auteurs, cette approche serait efficace car elle repose sur le principe d’une participation active des familles depuis l’identification des besoins, l’établissement de l’intervention et l’acquisition de nouvelles compétences plutôt que sur une réception passive d’une intervention externe faites par des professionnels. Ajoutons encore avec Larivée (2012) que pour renforcer l’efficacité des programmes d’implication parentale, il est important de concevoir les interventions en se référant aux données probantes de la recherche scientifique. Nous nous demandons si, par conséquent, le fait de renforcer la participation des parents dans la scolarité de leur enfant, au sein du modèle SSPM, dans le cadre d’un véritable partenariat école-famille autour d’une compétence d’apprentissage particulière, pourrait renforcer l’influence positive de ce soutien parental sur le développement scolaire de l’enfant tant au niveau des apprentissages scolaires (numératie et littératie) que de ses compétences socio-émotionnelles. C’est donc à travers une récension des écrits que nous cherchons à mettre en évidence l’intérêt de la participation des parents à un modèle de RàI ou une approche basée sur un SSPM. Pour réaliser cette synthèse, nous avons procédé de la façon suivante. Nous avons mené une recension de textes sur la participation des parents, le RàI ou le SSPM. Pour ce faire, nous avons eu recours à la base de données Education Research Complete. Nous avons utilisé les mots-clefs suivants : participation parentale, engagement parental ou investissement parental, Réponse à l’Intervention (RàI), Système de Soutien à Paliers Multiples (SSPM), numératie, littératie ou compétences socio-émotionnelles, ainsi que leur traduction en anglais : Response to intervention, Multi-tiered system of support, parental involvement ou parent engagement ou parent participation, numeracy, litteracy or Social-Emotional Learning (SEL). Les critères utilisés pour sélectionner les articles sont les suivants : 1) l’article est issu d’une revue à comité de lecture ; 2) l’article est disponible en langue française ou anglaise ; 3) l’article utilise une méthodologie qualitative et/ou quantitative étudiant l’intérêt d’une participation des parents dans un modèle RàI ou dans une approche en SSPM visant le développement de la numératie, de la littératie ou le développement socio-émotionnel chez des élèves du préscolaire et du primaire. Ce sont les résultats détaillés de cette récension d’écrits qui feront l’objet de la communication. Bibliographie 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). Castro, M., Expósito-Casas, E., López-Martín, E., Lizasoain, L., Navarro-Asencio, E., & Gaviria, J. (2015). Parental involvement on student academic achievement: A meta-analysis. Educational Research Review, 14, 33-46. http://dx.doi.org/10.1016/j.edurev.2015.01.002 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 Garbacz, S. & Woods, Kathryn & Swanger-Gagné, Michelle & Taylor, Ashley & Black, Kathryn & Sheridan, Susan. (2008). The Effectiveness of a Partnership-Centered Approach in Conjoint Behavioral Consultation. School Psychology Quarterly, 23(3), 313-326. 10.1037/1045-3830.23.3.313. 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. [less ▲]

Detailed reference viewed: 227 (55 UL)
See detailPersonal Informatics at Work
van den Heuvel, Roy; Lallemand, Carine UL

Scientific Conference (2023, April)

An ever-increasing amount of sensor technologies surrounds our work environment, collecting data about workers? activity and wellbeing ? often without them having any say in this. This datafication of the ... [more ▼]

An ever-increasing amount of sensor technologies surrounds our work environment, collecting data about workers? activity and wellbeing ? often without them having any say in this. This datafication of the workplace can help find novel ways to stimulate healthy behaviors or increase productivity. However, the ubiquitous usage of data collectors in the workplace can also put employees in a position of power imbalance, where management is frequently aiming at ?optimizing? employees towards normative and more-than-often problematic standards of productivity and wellbeing. Yet, data-tracking practices might not only seek an optimum but also can be interpreted towards self-enhancement (Meissner, 2016). In this sense, optimization is not per se an improvement on previous goals, but rather allows ?the discovery of new opportunities?. Indeed, data can be a means of giving space for users to be curious about their own subjective work experiences. Personal Informatics research has mostly focused on leisure and health-related topics but it takes on different forms, requirements, and ethical considerations for a work context. To explore how such considerations emerge from material practices, we conducted a field study, deploying a research probe called Habilyzer at a workplace (N=5). Findings show that users explored aspects meaningful to them yet highlight discrepancies between the envisioned self-tracking goals and participants? practices. Regarding sensors? open-endedness, a balance between the burden of data collection and the value derived from it appeared critical. We contribute new insights into how open-ended sensor technologies can be designed to support self-tracking practices in the workplace. [less ▲]

Detailed reference viewed: 72 (1 UL)
Full Text
Peer Reviewed
See detailTowards Log Slicing
Dawes, Joshua UL; Shin, Donghwan; Bianculli, Domenico UL

in Dawes, Joshua; Shin, Donghwan; Bianculli, Domenico (Eds.) Towards Log Slicing (2023, April)

This short paper takes initial steps towards developing a novel approach, called log slicing, that aims to answer a practical question in the field of log analysis: Can we automatically identify log ... [more ▼]

This short paper takes initial steps towards developing a novel approach, called log slicing, that aims to answer a practical question in the field of log analysis: Can we automatically identify log messages related to a specific message (e.g., an error message)? The basic idea behind log slicing is that we can consider how different log messages are "computationally related" to each other by looking at the corresponding logging statements in the source code. These logging statements are identified by 1) computing a backwards program slice, using as criterion the logging statement that generated a problematic log message; and 2) extending that slice to include relevant logging statements. The paper presents a problem definition of log slicing, describes an initial approach for log slicing, and discusses a key open issue that can lead towards new research directions. [less ▲]

Detailed reference viewed: 30 (5 UL)
Full Text
Peer Reviewed
See detailThe Elements of Visual Art Recommendation: Learning Latent Semantic Representations of Paintings
Yilma, Bereket Abera UL; Leiva, Luis A. UL

in Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems (CHI ’23) (2023, April)

Artwork recommendation is challenging because it requires understanding how users interact with highly subjective content, the complexity of the concepts embedded within the artwork, and the emotional and ... [more ▼]

Artwork recommendation is challenging because it requires understanding how users interact with highly subjective content, the complexity of the concepts embedded within the artwork, and the emotional and cognitive reflections they may trigger in users. In this paper, we focus on efficiently capturing the elements (i.e., latent semantic relationships) of visual art for personalized recommendation. We propose and study recommender systems based on textual and visual feature learning techniques, as well as their combinations. We then perform a small-scale and a large-scale user-centric evaluation of the quality of the recommendations. Our results indicate that textual features compare favourably with visual ones, whereas a fusion of both captures the most suitable hidden semantic relationships for artwork recommendation. Ultimately, this paper contributes to our understanding of how to deliver content that suitably matches the user's interests and how they are perceived. [less ▲]

Detailed reference viewed: 191 (42 UL)
See detailContinuer à faire réseau : le regard d’une chercheuse sur le projet Respadon (conclusion de la journée).
Schafer, Valerie UL

Scientific Conference (2023, March 13)

L’équipe de ResPaDon organise une journée d’échange autour des résultats et des perspectives de ce projet débuté en mars 2021. Des conditions d’accès aux collectes collaboratives, des enjeux juridiques à ... [more ▼]

L’équipe de ResPaDon organise une journée d’échange autour des résultats et des perspectives de ce projet débuté en mars 2021. Des conditions d’accès aux collectes collaboratives, des enjeux juridiques à la coopération entre acteurs nationaux et établissements de proximité, le Réseau de Partenaires pour l’exploration et l’analyse de données numériques (ResPaDon) propose de partager les résultats de sa démarche pour développer les usages scientifiques de la collection des archives du dépôt légal du web. [less ▲]

Detailed reference viewed: 31 (0 UL)
Full Text
Peer Reviewed
See detailRefining the Mandatory Cybersecurity Incident Reporting under the NIS Directive 2.0: Event Types and Reporting Processes
Schmitz, Sandra UL

in Onwubiko, Cyril; Rosati, Pierangelo; Rege, Aunshul (Eds.) et al Proceedings of the International Conference on Cybersecurity, Situational Awareness and Social Media (2023, March 08)

Detailed reference viewed: 36 (0 UL)
Peer Reviewed
See detailLehrer-Schüler-Beziehungen: Von der Generalisierbarkeit positiver Befunde
Emslander, Valentin UL; Holzberger, Doris

Scientific Conference (2023, March 01)

Zahlreiche Studien zeigen Zusammenhänge zwischen positiven Lehrer-Schüler-Beziehungen und Ergebnisvariablen im schulischen Kontext (z.B. Noten, wahrgenommene Leistung, soziales Verhalten, Lernmotivation ... [more ▼]

Zahlreiche Studien zeigen Zusammenhänge zwischen positiven Lehrer-Schüler-Beziehungen und Ergebnisvariablen im schulischen Kontext (z.B. Noten, wahrgenommene Leistung, soziales Verhalten, Lernmotivation; Givens Rolland, 2012; Korpershoek et al., 2016). Hierbei werden Lehrer-Schüler-Beziehungen ganz unterschiedlich konzeptualisiert: Während die Lehrer-Schüler-Interaktion vor allem den praktischen Austausch zwischen Lehrkraft und Schüler*in betrachtet (z.B. Beteiligung am Unterrichtsgespräch), verbindet die konstruktive Unterstützung durch die Lehrkraft unterrichtliche und inhaltliche Unterstützung mit der Wärme und Qualität der Lehrer-Schüler-Beziehung (vgl. Decristan et al., 2022; Endedijk et al., 2021; Hamre & Pianta, 2001). Beide Aspekte sind bedeutend für den schulischen Lernerfolg (Endedijk et al., 2021). Vor dem Hintergrund zahlreicher Befunde stellt sich die Frage der Generalisierbarkeit von Effekten positiver Lehrer-Schüler-Beziehungen und -Interaktionen: Profitieren alle Schüler*innen gleichermaßen von emotionaler Nähe und Freundlichkeit der Lehrkraft? Oder zeigen sich Unterschiede, beispielsweise zwischen Jungen und Mädchen oder Schüler*innen verschiedenen Alters, inwieweit sich positive Lehrer-Schüler-Beziehungen auf Ergebnisvariablen auswirken? Auch die meta-analytische Literatur ist sich in diesen Fragen teilweise uneins (vgl. Lei et al., 2016; Roorda et al., 2017). Offen bleibt zudem, welche Schüler*innen besondere Nachteile haben bei einer negativen Lehrer-Schüler-Beziehung (Nurmi, 2012). Unser Symposium zeichnet ein umfassendes Bild dieser wichtigen Beziehung und Interaktion im Herzen der schulischen Bildung anhand der Generalisierbarkeit gefundener Effekte: Der erste Beitrag (Emslander et al., 2023) vergleicht die Rolle der elterliche Unterstützung mit der Unterstützung durch die Lehrkraft auf die akademische Entwicklung der Schüler*innen. Die umfangreiche längsschnittliche Studie verwendet Daten von Haupt-, Real- und Mittelschulen über einen Zeitraum von vier Jahren in der Adoleszenz. Ein Augenmerk liegt auf Unterschieden in den Zusammenhängen zwischen der fünften und achten Klasse. Der zweite Beitrag untersucht den Einfluss der Fehlerkultur bei der Beteiligung am Unterrichtsgespräch. Mithilfe von Videodaten werden Unterrichtsstunden in Mathematik und Deutsch untersucht. Die Studie untersucht differenzielle Befunde der Zusammenhänge in Abhängigkeit des Selbstkonzepts und Migrationshintergrunds von Schüler*innen. Ein dritter Beitrag beschäftigt sich mit dem moderierenden Einfluss der Schülerwahrnehmung von konstruktiven Lehrkraftunterstützung in der Sekundarstufe und ihrem Zusammenhang zu mathematischen Selbstkonzept und Interesse. Das besondere Augenmerk dieser Studie liegt auf den Unterschieden in der Motivation von jungen Frauen und Männern für das Fach Mathematik. Abschließend bietet ein vierter Beitrag einen Überblick über Korrelate von Lehrer-Schüler-Beziehungen in der Literatur. Das systematische Review von Meta-Analysen illustriert Zusammenhänge, Moderatoren und Studienqualität auf dem Gebiet der Lehrer-Schüler-Beziehungen. Besonders werden Alter und Geschlecht der Schüler*innen ebenso wie wer die Lehrer-Schüler-Beziehung einschätzt kontrovers diskutiert. LITERATUR Decristan, J., Kunter, M., & Fauth, B. (2022). Die Bedeutung individueller Merkmale und konstruktiver Unterstützung der Lehrkraft für die soziale Integration von Schülerinnen und Schülern im Mathematikunterricht der Sekundarstufe. Zeitschrift für Pädagogische Psychologie, 36(1–2), 85–100. https://doi.org/10.1024/1010-0652/a000329 Emslander, V., Holzberger, D., Fischbach, A., & Scherer, R. (2023, January 3). Lehrer-Schüler-Beziehungen und ihre Korrelate: Ein systematisches Review von Meta-Analysen [Teacher-Student Relationships and their Correlates: A systematic Review of Meta-Analyses]. In Emslander, V., & Holzberger, D. (Eds.) (2023, February 28 – March 2). Lehrer-Schüler-Beziehungen: Von der Generalisierbarkeit positiver Befunde [Teacher-Student Relationships: Of the Generalizability of Positive Results]. Symposium at the 10th Conference of the Society for Empirical Educational Research (GEBF), Essen, Germany. http://hdl.handle.net/10993/54530 Endedijk, H. M., Breeman, L. D., van Lissa, C. J., Hendrickx, M. M. H. G., den Boer, L., & Mainhard, T. (2021). The Teacher’s Invisible Hand: A Meta-Analysis of the Relevance of Teacher–Student Relationship Quality for Peer Relationships and the Contribution of Student Behavior. Review of Educational Research, 92(3). https://doi.org/10.3102/00346543211051428 Givens Rolland, R. (2012). Synthesizing the Evidence on Classroom Goal Structures in Middle and Secondary Schools: A Meta-Analysis and Narrative Review. Review of Educational Research, 82(4), 396–435. https://doi.org/10.3102/0034654312464909 Hamre, B. K., & Pianta, R. C. (2001). Early Teacher-Child Relationships and the Trajectory of Children’s School Outcomes through Eighth Grade. Child Development, 72(2), 625–638. https://doi.org/10.1111/1467-8624.00301 Korpershoek, H., Harms, T., de Boer, H., van Kuijk, M., & Doolaard, S. (2016). A Meta-Analysis of the Effects of Classroom Management Strategies and Classroom Management Programs on Students’ Academic, Behavioral, Emotional, and Motivational Outcomes. Review of Educational Research, 86(3), 643–680. https://doi.org/10.3102/0034654315626799 Lei, H., Cui, Y., & Chiu, M. M. (2016). Affective Teacher—Student Relationships and Students’ Externalizing Behavior Problems: A Meta-Analysis. Frontiers in Psychology, 7. https://doi.org/10.3389/fpsyg.2016.01311 Nurmi, J.-E. (2012). Students’ characteristics and teacher–child relationships in instruction: A meta-analysis. Educational Research Review, 7(3), 177–197. https://doi.org/10.1016/j.edurev.2012.03.001 Roorda, D. L., Jak, S., Zee, M., Oort, F. J., & Koomen, H. M. Y. (2017). Affective Teacher–Student Relationships and Students’ Engagement and Achievement: A Meta-Analytic Update and Test of the Mediating Role of Engagement. School Psychology Review, 46(3), 239–261. https://doi.org/10.17105/SPR-2017-0035.V46-3 [less ▲]

Detailed reference viewed: 33 (3 UL)
Peer Reviewed
See detailLehrer-Schüler-Beziehungen und ihre Korrelate: Ein systematisches Review von Meta-Analysen
Emslander, Valentin UL; Holzberger, Doris; Fischbach, Antoine UL et al

Scientific Conference (2023, March 01)

THEORETISCHER HINTERGRUND Gute Beziehungen zur eigenen Lehrerin können sich positiv auf den Erfolg eines Schülers auswirken. Dieser Effekt kann mit Bowlby’s (1982) Bindungstheorie erklärt werden und wird ... [more ▼]

THEORETISCHER HINTERGRUND Gute Beziehungen zur eigenen Lehrerin können sich positiv auf den Erfolg eines Schülers auswirken. Dieser Effekt kann mit Bowlby’s (1982) Bindungstheorie erklärt werden und wird empirisch immer wieder gestützt (z.B. Hamre & Pianta, 2001). Positive Lehrer-Schüler-Beziehungen zeichnen sich durch emotionale Wärme und Nähe aus; negative Aspekte durch Konflikt und Abhängigkeit. So stehen positive Lehrer-Schüler-Beziehungen nicht nur mit akademischen Leistungen in Verbindung, sondern auch mit einer Vielzahl anderer, wünschenswerter Schülerentwicklungen. Zahlreiche Meta-Analysen deuten auf signifikante Zusammenhänge zwischen Lehrer-Schüler-Beziehungen und schulischem Engagement, guten Beziehungen zu Gleichaltrigen, exekutiven Funktionen, allgemeinem Wohlbefinden und der Verringerung aggressiver oder störender Verhaltensweisen hin (Endedijk et al., 2021; Nurmi, 2012; Roorda et al., 2017; Vandenbroucke et al., 2018). Diese Befunde sind jedoch weit verstreut in der Literatur, sodass Forschungslücken unentdeckt bleiben. Auch unterscheiden sich bisherige Überblicksarbeiten in ihren Methoden und den gefundenen Zusammenhängen zwischen Lehrer-Schüler-Beziehungen und Ergebnisvariablen von Schüler*innen. Darüber hinaus ist die Literatur uneindeutig, welche Moderatoren (z.B. Alter oder Geschlecht) diese Beziehungen beeinflussen. Gleichzeitig variiert die Qualität der Meta-Analysen in diesem Feld merklich, was die Interpretation ihrer Ergebnisse erschweren kann. FRAGESTELLUNG Angesichts dieser Forschungslücken haben wir die meta-analytische Literatur systematisch durchsucht und zusammengefasst (Cooper & Koenka, 2012), um einen Überblick über Korrelate von Lehrer-Schüler-Beziehungen zu schaffen. Hierbei untersuchten wir drei Forschungsfragen 1. Inwieweit hängen akademische, verhaltensbezogene, sozio-emotionale, motivationale und kognitive Schülereigenschaften mit Lehrer-Schüler-Beziehungen in der meta-analytischen Literatur zusammen? 2. Welche Moderatoren beeinflussen diese Zusammenhänge? 3. Welche methodische Qualität haben die einbezogenen Meta-Analysen? METHODE Um diese Forschungsfragen zu beantworten, analysierten wir 24 Meta-Analysen, die rund 130 Effektstärken für über eine Million Schüler*innen umfassten. Nach der Präregistrierung erfolgte eine systematische Literatursuche. Während mehrerer Runden der Überprüfung mithilfe unserer Ein- und Ausschlusskriterien identifizierten wir 24 passende Meta-Analysen. Aus diesen Meta-Analysen extrahierten wir die Effektstärken zum Zusammenhang von Lehrer-Schüler-Beziehungen und akademische, verhaltensbezogene, sozio-emotionale, motivationale und allgemeine kognitive Schülereigenschaften. Für die Forschungsfragen 1 und 2 haben wir die Ergebnisse zusammengefasst und einen narrativen Überblick erarbeitet. Für Forschungsfrage 3 bewerteten wir die Qualität der Meta-Analysen mit Hilfe der AMSTAR-2 Skala (angepasst an korrelative Studien in der Psychologie und Bildungsforschung; Shea et al., 2017). ERGEBNISSE UND IHRE BEDEUTUNG Mit Blick auf die Lehrer-Schüler-Beziehungen werden unterschiedliche Ergebnisvariablen analysiert (Forschungsfrage 1). Die stärksten Zusammenhänge zeigten sich für Konflikt und Abhängigkeit in der Lehrer-Schüler-Beziehung mit Verhaltensproblemen der Schüler*innen (r = .35 bis .57; Nurmi, 2012). Positive Lehrer-Schüler-Beziehungen zeigte die stärkste Verbindung mit der Beteiligung in der Schule (r = .26 bis .34; Roorda et al., 2011), prosozialem, externalisierendem und internalisierendem Verhalten (r = .25; Endedijk et al., 2021) sowie mit Lernmotivation in Kombination mit Beteiligung der Schüler*innen (r = .23; Wang et al., 2020). Alter oder Klassenstufe waren die am häufigsten untersuchten Moderatoren mit teilweise gegenläufigen Befunden (Forschungsfrage 2). Geschlechterunterschiede wurden dagegen seltener festgestellt. Gleichzeitig wurde der Effekt der Informationsquelle häufig untersucht, d.h., ob und auf welche Weise Lehrkräfte, Gleichaltrige oder die Schüler*innen selbst die Lehrer-Schüler-Beziehung bewerteten. Für Forschunsgfrage 3 diskutieren wir die Qualitätsunterschiede der Meta-Analysen. Mit dem systematischen Review von Meta-Analysen fassen wir die Forschungslandschaft zu Korrelaten von Lehrer-Schüler-Beziehungen zusammen und zeigen, in welchem Zusammenhang diese mit Lehrer-Schüler-Beziehungen stehen. Unseren Ergebnissen folgend sollten Lehrkräfte für die Wirkung von Lehrer-Schüler-Beziehungen und deren Zusammenhängen sensibilisiert werden. Einige Interventionen zur Verbesserung von dieser wichtigen Beziehungen wurden bereits meta-analytisch mit vielversprechende Ergebnissen untersucht (Kincade et al., 2020). Ein nächster Schritt ist nun die experimentelle Überprüfung der gefundenen Korrelate, um positive Lehrer-Schüler-Beziehungen als wirksame Strategie zur Verbesserung von akademischen, verhaltensbezogenen, sozio-emotionalen, motivationalen und kognitiven Schülereigenschaften kausal zu bestätigen. LITERATUR Bowlby, J. (1982). Attachment and loss: Vol. 1. Attachment. (2nd ed., Vol. 1). Basic Books. Cooper, H., & Koenka, A. C. (2012). The overview of reviews: Unique challenges and opportunities when research syntheses are the principal elements of new integrative scholarship. American Psychologist, 67(6), 446–462. https://doi.org/10.1037/a0027119 Decristan, J., Kunter, M., & Fauth, B. (2022). Die Bedeutung individueller Merkmale und konstruktiver Unterstützung der Lehrkraft für die soziale Integration von Schülerinnen und Schülern im Mathematikunterricht der Sekundarstufe. Zeitschrift für Pädagogische Psychologie, 36(1–2), 85–100. https://doi.org/10.1024/1010-0652/a000329 Endedijk, H. M., Breeman, L. D., van Lissa, C. J., Hendrickx, M. M. H. G., den Boer, L., & Mainhard, T. (2021). The Teacher’s Invisible Hand: A Meta-Analysis of the Relevance of Teacher–Student Relationship Quality for Peer Relationships and the Contribution of Student Behavior. Review of Educational Research, 003465432110514. https://doi.org/10.3102/00346543211051428 Givens Rolland, R. (2012). Synthesizing the Evidence on Classroom Goal Structures in Middle and Secondary Schools: A Meta-Analysis and Narrative Review. Review of Educational Research, 82(4), 396–435. https://doi.org/10.3102/0034654312464909 Hamre, B. K., & Pianta, R. C. (2001). Early Teacher-Child Relationships and the Trajectory of Children’s School Outcomes through Eighth Grade. Child Development, 72(2), 625–638. https://doi.org/10.1111/1467-8624.00301 Kincade, L., Cook, C., & Goerdt, A. (2020). Meta-Analysis and Common Practice Elements of Universal Approaches to Improving Student-Teacher Relationships. Review of Educational Research, 90(5), 710–748. https://doi.org/10.3102/0034654320946836 Korpershoek, H., Harms, T., de Boer, H., van Kuijk, M., & Doolaard, S. (2016). A Meta-Analysis of the Effects of Classroom Management Strategies and Classroom Management Programs on Students’ Academic, Behavioral, Emotional, and Motivational Outcomes. Review of Educational Research, 86(3), 643–680. https://doi.org/10.3102/0034654315626799 Lei, H., Cui, Y., & Chiu, M. M. (2016). Affective Teacher—Student Relationships and Students’ Externalizing Behavior Problems: A Meta-Analysis. Frontiers in Psychology, 7. https://doi.org/10.3389/fpsyg.2016.01311 Nurmi, J.-E. (2012). Students’ characteristics and teacher–child relationships in instruction: A meta-analysis. Educational Research Review, 7(3), 177–197. https://doi.org/10.1016/j.edurev.2012.03.001 Roorda, D. L., Jak, S., Zee, M., Oort, F. J., & Koomen, H. M. Y. (2017). Affective Teacher–Student Relationships and Students’ Engagement and Achievement: A Meta-Analytic Update and Test of the Mediating Role of Engagement. School Psychology Review, 46(3), 239–261. https://doi.org/10.17105/SPR-2017-0035.V46-3 Roorda, D. L., Koomen, H. M. Y., Spilt, J. L., & Oort, F. J. (2011). The Influence of Affective Teacher–Student Relationships on Students’ School Engagement and Achievement: A Meta-Analytic Approach. Review of Educational Research, 81(4), 493–529. https://doi.org/10.3102/0034654311421793 Shea, B. J., Reeves, B. C., Wells, G., Thuku, M., Hamel, C., Moran, J., Moher, D., Tugwell, P., Welch, V., Kristjansson, E., & Henry, D. A. (2017). AMSTAR 2: A critical appraisal tool for systematic reviews that include randomised or non-randomised studies of healthcare interventions, or both. BMJ, j4008. https://doi.org/10.1136/bmj.j4008 Vandenbroucke, L., Spilt, J., Verschueren, K., Piccinin, C., & Baeyens, D. (2018). The Classroom as a Developmental Context for Cognitive Development: A Meta-Analysis on the Importance of Teacher–Student Interactions for Children’s Executive Functions. Review of Educational Research, 88(1), 125–164. https://doi.org/10.3102/0034654317743200 Wang, M.-T., L. Degol, J., Amemiya, J., Parr, A., & Guo, J. (2020). Classroom climate and children’s academic and psychological wellbeing: A systematic review and meta-analysis. Developmental Review, 57, 100912. https://doi.org/10.1016/j.dr.2020.100912 [less ▲]

Detailed reference viewed: 29 (2 UL)
Peer Reviewed
See detailDiversifikation im Klassenzimmer – ein Einwegspiegel?
Pit-Ten Cate, Ineke UL; Rivas, Salvador UL; Busana, Gilbert UL

Scientific Conference (2023, March 01)

Detailed reference viewed: 40 (0 UL)
Full Text
Peer Reviewed
See detailPerformance Analysis and Benchmarking of a Temperature Downscaling Deep Learning Model
Panner Selvam, Karthick UL; Brorsson, Mats Hakan UL

in 31st Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, Naples, Italy 1-3 March 2023 (2023, March)

We are presenting here a detailed analysis and performance characterization of a statistical temperature downscaling application used in the MAELSTROM EuroHPC project. This application uses a deep ... [more ▼]

We are presenting here a detailed analysis and performance characterization of a statistical temperature downscaling application used in the MAELSTROM EuroHPC project. This application uses a deep learning methodology to convert low-resolution atmospheric temperature states into high-resolution. We have performed in-depth profiling and roofline analysis at different levels (Operators, Training, Distributed Training, Inference) of the downscaling model on different hardware architectures (Nvidia V100 & A100 GPUs). Finally, we compare the training and inference cost of the downscaling model with various cloud providers. Our results identify the model bottlenecks which can be used to enhance the model architecture and determine hardware configuration for efficiently utilizing the HPC. Furthermore, we provide a comprehensive methodology for in-depth profiling and benchmarking of the deep learning models. [less ▲]

Detailed reference viewed: 48 (11 UL)
Full Text
Peer Reviewed
See detailRegional heterogeneity and individual characteristics in the development of a European tax policy: historical insights from Luxembourg
Danescu, Elena UL

in Danescu, Elena; Dima, Alina Mihaela (Eds.) Fostering recovery through metaverse business modelling - An interdisciplinary analysis of the new paradigm shift (2023, March)

Luxembourg is currently one of the most politically stable, consensus-oriented, and prosperous countries in the world, characterised by am advanced social market economy, and a level of material wellbeing ... [more ▼]

Luxembourg is currently one of the most politically stable, consensus-oriented, and prosperous countries in the world, characterised by am advanced social market economy, and a level of material wellbeing above the EU average. Its strong fiscal position is well illustrated by a longstanding AAA credit rating, a significant accumulation of government financial assets, and a distinct fiscal approach. In this light, this paper aims to investigate the specific features of the tax system in Luxembourg from a multidisciplinary perspective by analysing historical sources and exploring the development of these particularities over time, their impact on the socioeconomic context and their repercussions for the European integration process, especially in the design and completion of Economic and Monetary Union (EMU). [less ▲]

Detailed reference viewed: 36 (1 UL)
Full Text
Peer Reviewed
See detailNegative Results of Fusing Code and Documentation for Learning to Accurately Identify Sensitive Source and Sink Methods An Application to the Android Framework for Data Leak Detection
Samhi, Jordan UL; Kober, Kober; Kabore, Abdoul Kader UL et al

in 30th IEEE International Conference on Software Analysis, Evolution and Reengineering (2023, March)

Apps on mobile phones manipulate all sorts of data, including sensitive data, leading to privacy related concerns. Recent regulations like the European GDPR provide rules for the processing of personal ... [more ▼]

Apps on mobile phones manipulate all sorts of data, including sensitive data, leading to privacy related concerns. Recent regulations like the European GDPR provide rules for the processing of personal and sensitive data, like that no such data may be leaked without the consent of the user. Researchers have proposed sophisticated approaches to track sensitive data within mobile apps, all of which rely on specific lists of sensitive source and sink methods. The data flow analysis results greatly depend on these lists' quality. Previous approaches either used incomplete hand-written lists and quickly became outdated or relied on machine learning. The latter, however, leads to numerous false positives, as we show. This paper introduces CoDoC that aims to revive the machine-learning approach to precisely identify the privacy-related source and sink API methods. In contrast to previous approaches, CoDoC uses deep learning techniques and combines the source code with the documentation of API methods. Firstly, we propose novel definitions that clarify the concepts of taint analysis, source, and sink methods. Secondly, based on these definitions, we build a new ground truth of Android methods representing sensitive source, sink, and neither methods that will be used to train our classifier. We evaluate CoDoC and show that, on our validation dataset, it achieves a precision, recall, and F1 score of 91%, outperforming the state-of-the-art SuSi. However, similarly to existing tools, we show that in the wild, i.e., with unseen data, CoDoC performs poorly and generates many false-positive results. Our findings suggest that machine-learning models for abstract concepts such as privacy fail in practice despite good lab results. To encourage future research, we release all our artifacts to the community. [less ▲]

Detailed reference viewed: 88 (10 UL)
Full Text
See detailDie Grenzen aufgezeigt:Technische Innovation und räumliche Abstraktion am Beispiel früher Landkarten der Grenzregion zwischen dem Herzogtum Luxemburg und dem Kurfürstentum Trier
Solchenbach, Karl UL

in Schröder, Lina; Wegewitz, Markus (Eds.) Europäische Grenzregionen. Neue Wege im Umgang mit historischen Raum- und Grenzkonzeptionen in der Geschichtswissenschaft (2023, March)

Die Ausbildung und Verfestigung der kurtrierischen und luxemburgischen Landesherrschaften war im 14. Jahrhundert weitgehend zum Abschluss gekommen. Die Transformation vom Personenverbands- zum ... [more ▼]

Die Ausbildung und Verfestigung der kurtrierischen und luxemburgischen Landesherrschaften war im 14. Jahrhundert weitgehend zum Abschluss gekommen. Die Transformation vom Personenverbands- zum Flächenstaat frühneuzeitlicher Prägung hatte die Ausbildung einer zunehmend deutlicheren Grenze zwischen beiden Territorien zur Folge. Ebenso formierte sich auch eine Grenze im Grenzraum mit Frankreich und Lothringen. Die vereinfachende Darstellung komplexer teils überlagerter Grenzzonen in Form von abstrahierenden Linien musste von den zeitgenössischen Kartographen jedoch erst noch entwickelt werden. Die älteste regionale Karte mit einer angedeuteten partiellen Grenzmarkierung stammt aus dem Jahr 1555. Eine zunehmende Professionalisierung der Kartographie gelang ab der zweiten Hälfte des 16. Jahrhunderts durch Landesaufnahmen, initiiert von den jeweiligen Landesherren. Die Intention der Auftraggeber war dabei ähnlich: einerseits sollte das jeweilige Territorium durch die Karte möglichst als geschlossen beherrschter Raum dargestellt werden, andererseits galt es, die bisher nur verbal beschriebenen teils strittigen Grenzen als abstrakte Linien deutlich sichtbar zu machen. Die Karten der Landesaufnahmen waren zunächst geheim, dennoch fanden sie bereits nach wenigen Jahren Eingang in die Atlanten von Ortelius, de Jode und Mercator. Diese beeinflussten wiederum die Karten der Region in den späteren Atlanten der niederländischen, französischen und süddeutschen Kartenverleger. Der Beitrag beschreibt, ab wann und in welcher Form Grenzen in frühen Karten (16.-18. Jahrhundert) dargestellt wurden. Besonders in den Blick genommen wird der Prozess der Ausbildung von Linien zur abstrakten Darstellung unklarer, teils strittiger Grenzräume sowie die zunehmende Professionalisierung und Genauigkeit in der kartographischen Darstellung durch Vermessungen im Feld. [less ▲]

Detailed reference viewed: 37 (1 UL)
See detailTable ronde : L'historiographie de l'histoire des relations internationales en Belgique 1950-1970
Briamont, Thomas; Brüll, Christoph UL; Sierens, Vivien

Scientific Conference (2023, February 17)

Detailed reference viewed: 23 (1 UL)
Full Text
See detailInvestigation of OpenFOAM-XDEM momentum coupling results for AWJC Nozzle using preCICE
Adhav, Prasad UL

Scientific Conference (2023, February 14)

The high-speed water jet is the momentum source in an Abrasive Water Jet Cutting Nozzle. This momentum is transferred to the abrasive particles & the air within the nozzle. This leads to turbulent ... [more ▼]

The high-speed water jet is the momentum source in an Abrasive Water Jet Cutting Nozzle. This momentum is transferred to the abrasive particles & the air within the nozzle. This leads to turbulent & complex particle-laden flow in the nozzle. These flow conditions can influence particle impacts on the nozzle, thus influencing erosion. Hence it is imperative that this complex particle-laden flow is captured correctly. The momentum exchange can be directly from the water jet to the particles or indirectly through the airflow. In this work, we investigate these fluid-particle momentum exchanges. Our prototype uses preCICE for volumetric coupling of XDEM (for the particle motion), & OpenFOAM (for the fluid). XDEM uses fluid flow conditions to compute the forces acting on particles. XDEM computes the particle momentum source that is injected into the fluid solver. The results of the coupled simulation align with literature & can be extended to include the FEM component for erosion predictions. [less ▲]

Detailed reference viewed: 45 (1 UL)
See detailExplorers presenter
Cauvin, Thomas UL

Scientific Conference (2023, February 01)

Detailed reference viewed: 23 (0 UL)
Full Text
Peer Reviewed
See detailExploring the Embodied Experience of Walking Meetings through Bodystorming – Implications for Design
Jacob, Melodie; Damen, Ida; Lallemand, Carine UL

in TEI'23 Seventeenth International Conference on Tangible, Embedded, and Embodied Interaction (2023, February)

Walking meetings are a promising way to reduce unhealthy sedentary behavior at the office. Some aspects of walking meetings are however hard to assess using traditional research approaches that do not ... [more ▼]

Walking meetings are a promising way to reduce unhealthy sedentary behavior at the office. Some aspects of walking meetings are however hard to assess using traditional research approaches that do not account well for the embodied experience of walking meetings. We conducted a series of 16 bodystorming sessions, featuring unusual walking meeting situations to engage participants (N=45) in a reflective experience. After each bodystorming, participants completed three tasks: a body map, an empathy map, and a rating of workload using the NASA-TLX scale. These embodied explorations provide insights on key themes related to walking meetings: material and tools, physical and mental demand, connection with the environment, social dynamics, and privacy. We discuss the role of technology and opportunities for technology-mediated walking meetings. We draw implications for the design of walking meeting technologies or services to account for embodied experiences, and the individual, social, and environmental factors at play. [less ▲]

Detailed reference viewed: 56 (1 UL)
Peer Reviewed
See detailWhich Factors Play a Role in CoCo Issuance? Evidence from European Banks
Wolff, Christian UL

Scientific Conference (2023, February)

Detailed reference viewed: 8 (2 UL)
Full Text
Peer Reviewed
See detailBringing Movement to Digital Tasks at the Office: Designing an Acceptably Active Interface Interaction for Sending Emails
Keller, Philip; van den Heuvel, Roy; Lallemand, Carine UL

in Proceedings of the Seventeenth International Conference on Tangible, Embedded, and Embodied Interaction TEI'23 (2023, February)

While working on a computer typically involves sitting for prolonged periods of time, sedentary work routines are associated with numerous health issues. To address this societal concern, existing ... [more ▼]

While working on a computer typically involves sitting for prolonged periods of time, sedentary work routines are associated with numerous health issues. To address this societal concern, existing solutions trigger physical activity as a break from work, rather than a part of it. In this research, we explore a vision for physically active ways of working, by transforming mundane digital tasks into physically active ones. As a research artifact and design exemplar, we present A2-I2, an innovative tangible system for sending emails. After loading their email onto a physical “letter” token, office workers must walk to a physical mailbox located in the office space. Understanding what design qualities influence the experience and acceptability of such systems is a necessary step toward the design of acceptably active interface interactions. We report on a preliminary user test with 8 participants. With this project, we aim to inspire future tangible and embodied systems addressing the timely issue of sedentary behavior at work. [less ▲]

Detailed reference viewed: 61 (3 UL)
Full Text
See detailEMN Inform "Transition of unaccompanied minors to adulthood"
Sommarribas, Adolfo UL

Scientific Conference (2023, January 31)

This presentation shares the main results of the EMN Inform Transition of unaccompanied minors to adulthood" indicating what are the challenges that unaccompanied minors confront when they reach adulthood ... [more ▼]

This presentation shares the main results of the EMN Inform Transition of unaccompanied minors to adulthood" indicating what are the challenges that unaccompanied minors confront when they reach adulthood and how Member States respond to this situation. [less ▲]

Detailed reference viewed: 23 (0 UL)
Full Text
See detailBreakthrough of directional statistics in space science
Palmirotta, Guendalina UL

Scientific Conference (2023, January 24)

It should be no surprise that already back in the 17-18th centuries important foundations of modern statistical theory were formulated to address astronomical problems, the astronomers were the ... [more ▼]

It should be no surprise that already back in the 17-18th centuries important foundations of modern statistical theory were formulated to address astronomical problems, the astronomers were the statisticians. For instance the 'almost coincidence' in the orbits of the planets in our Solar System with the ecliptic has intrigued the scientists for a long time. Even D. Bernoulli (in the 1730's) wondered if this fact could happen 'by chance'. In a statistical framework, one could think of using a uniformity test on the sphere. Testing isotropy or, equivalently, testing uniformity on the unit hypersphere is one of the oldest as well as most fundamental problems in directional statistics and it is still much considered nowadays. Furthermore with the increasing astronomical data, innovative modern directional statistical theories and models have been proposed to deal with space science issues such as tracking space objects. In this talk, we will provide a review of the many old and recent developments of directional statistics animated by interesting applications in space science. This is a joint work with Christophe Ley. [less ▲]

Detailed reference viewed: 26 (4 UL)
Full Text
Peer Reviewed
See detailTerminal-Aware Multi-Connectivity Scheduler for Uplink Multi-Layer Non-Terrestrial Networks
Dazhi, Michael UL; Al-Hraishawi, Hayder UL; Mysore Rama Rao, Bhavani Shankar UL et al

in IEEE Global Communications Conference (Globecom) (2023, January 12)

This paper introduces the concept of multi-connectivity (MC) to the multi-orbit non-terrestrial networks (NTNs), where user terminals can be served by more than one satellite to achieve higher peak ... [more ▼]

This paper introduces the concept of multi-connectivity (MC) to the multi-orbit non-terrestrial networks (NTNs), where user terminals can be served by more than one satellite to achieve higher peak throughput. MC is a technique initially introduced by the 3rd Generation Partnership Project (3GPP) for terrestrial communications in 4G and 5G, it has shown much gain in the terrestrial domain and this paper explores areas where this concept can benefit the satellite domain. MC can increase throughput, but this entails increased power consumption at user terminal for uplink transmissions. The energy efficiency of uplink communications can be improved by designing efficient scheduling schemes, and to this end, we developed a terminal aware multi-connectivity scheduling algorithm. This proposed algorithm uses the available radio resources and propagation information to intelligently define a dynamic resource allocation pattern, that optimally routes traffic so as to maximize uplink data rate while minimizing the energy consumption at the UT. The algorithm operates with the terminal differentiating multi-layer NTN resource scheduling architecture, which has a softwarized dispatcher at the network layer that classifies and differentiates the packets based on terminal type. The performance of the proposed algorithm was compared with round robin and joint carrier schedulers in terms of uplink data rate and energy efficiency. We also provide architectural design of implementable schedulers for multi-orbital satellite networks that can operate with different classes of terminals. [less ▲]

Detailed reference viewed: 145 (36 UL)
Full Text
Peer Reviewed
See detailThe Ugly Truth of Realistic Perception in Vehicular Simulations
Hawlader, Faisal UL; Frank, Raphaël UL

Poster (2023, January 08)

Automated vehicles use sensors to perceive the environment, and studies have shown the limitations of these sensors. The onboard sensors may not detect objects when other participants occlude the Field of ... [more ▼]

Automated vehicles use sensors to perceive the environment, and studies have shown the limitations of these sensors. The onboard sensors may not detect objects when other participants occlude the Field of View (FoV). Thus, sensor efficiency must be tested to ensure its reliability. Simulation is an excellent test option due to the complexity associated with practical experiments. However, emerging simulation frameworks still have various limitations, especially when it comes to large-scale evaluation. This work investigates realistic perception simulation options for autonomous vehicles. We report the perception accuracy for different traffic scenarios. [less ▲]

Detailed reference viewed: 146 (46 UL)
Full Text
See detailNew results in finite mixture modeling
Schiltz, Jang UL; Noel, Cédric

Scientific Conference (2023, January 05)

Detailed reference viewed: 16 (0 UL)
Full Text
Peer Reviewed
See detailFederated Learning for Credit Risk Assessment
Lee, Chul Min UL; Delgado Fernandez, Joaquin UL; Potenciano Menci, Sergio UL et al

in Proceedings of the 56th Hawaii International Conference on System Sciences (2023, January 03)

Credit risk assessment is a standard procedure for financial institutions (FIs) when estimating their credit risk exposure. It involves the gathering and processing quantitative and qualitative datasets ... [more ▼]

Credit risk assessment is a standard procedure for financial institutions (FIs) when estimating their credit risk exposure. It involves the gathering and processing quantitative and qualitative datasets to estimate whether an individual or entity will be able to make future required payments. To ensure effective processing of this data, FIs increasingly use machine learning methods. Large FIs often have more powerful models as they can access larger datasets. In this paper, we present a Federated Learning prototype that allows smaller FIs to compete by training in a cooperative fashion a machine learning model which combines key data derived from several smaller datasets. We test our prototype on an historical mortgage dataset and empirically demonstrate the benefits of Federated Learning for smaller FIs. We conclude that smaller FIs can expect a significant performance increase in their credit risk assessment models by using collaborative machine learning. [less ▲]

Detailed reference viewed: 69 (17 UL)
Full Text
Peer Reviewed
See detailFederated Learning as a Solution for Problems Related to Intergovernmental Data Sharing
Sprenkamp, Kilian; Delgado Fernandez, Joaquin UL; Eckhardt, Sven et al

in Proceedings of the 56th Hawaii International Conference on System Sciences (2023, January 03)

To address global problems, intergovernmental collaboration is needed. Modern solutions to these problems often include data-driven methods like artificial intelligence (AI), which require large amounts ... [more ▼]

To address global problems, intergovernmental collaboration is needed. Modern solutions to these problems often include data-driven methods like artificial intelligence (AI), which require large amounts of data to perform well. However, data sharing between governments is limited. A possible solution is federated learning (FL), a decentralised AI method created to utilise personal information on edge devices. Instead of sharing data, governments can build their own models and just share the model parameters with a centralised server aggregating all parameters, resulting in a superior overall model. By conducting a structured literature review, we show how major intergovernmental data sharing challenges like disincentives, legal and ethical issues as well as technical constraints can be solved through FL. Enhanced AI while maintaining privacy through FL thus allows governments to collaboratively address global problems, which will positively impact governments and citizens. [less ▲]

Detailed reference viewed: 43 (1 UL)
Full Text
Peer Reviewed
See detailAstute Approach to Handling Memory Layouts of Regular Data Structures
Šmelko, Adam; Kruliš, Martin; Kratochvil, Miroslav UL et al

in Algorithms and Architectures for Parallel Processing (2023, January)

Programmers of high-performance applications face many challenging aspects of contemporary hardware architectures. One of the critical aspects is the efficiency of memory operations which is affected not ... [more ▼]

Programmers of high-performance applications face many challenging aspects of contemporary hardware architectures. One of the critical aspects is the efficiency of memory operations which is affected not only by the hardware parameters such as memory throughput or cache latency but also by the data-access patterns, which may influence the utilization of the hardware, such as re-usability of the cached data or coalesced data transactions. Therefore, a performance of an algorithm can be highly impacted by the layout of its data structures or the order of data processing which may translate into a more or less optimal sequence of memory operations. These effects are even more pronounced on highly-parallel platforms, such as GPUs, which often employ specific execution models (lock-step) or memory models (shared memory). In this work, we propose a modern, astute approach for managing and implementing memory layouts with first-class structures that is very efficient and straightforward. This approach was implemented in Noarr, a GPU-ready portable C++ library that utilizes generic programming, functional design, and compile-time computations to allow the programmer to specify and compose data structure layouts declaratively while minimizing the indexing and coding overhead. We describe the main principles on code examples and present a performance evaluation that verifies our claims regarding its efficiency. [less ▲]

Detailed reference viewed: 22 (0 UL)
Full Text
Peer Reviewed
See detailVehicle-to-Infrastructure Communication for Real-Time Object Detection in Autonomous Driving
Hawlader, Faisal UL; Robinet, François UL; Frank, Raphaël UL

in 18th Wireless On-demand Network systems and Services Conference (WONS-23) (2023, January)

Environmental perception is a key element of autonomous driving because the information receive from the perception module influences core driving decisions. An outstanding challenge in real-time ... [more ▼]

Environmental perception is a key element of autonomous driving because the information receive from the perception module influences core driving decisions. An outstanding challenge in real-time perception for autonomous driving lies in finding the best trade-off between detection quality and latency. Major constraints on both computation and power have to be taken into account for real-time perception in autonomous vehicles. Larger object detection models tend to produce the best results, but are also slower at runtime. Since the most accurate detectors cannot run in real-time locally, we investigate the possibility of offloading computation to edge and cloud platforms, which are less resource-constrained. We create a synthetic dataset to train an object detection model and evaluate different offloading strategies. Using real hardware and network simulations, we compare different trade-offs between prediction quality and end-to-end delay. Since sending raw frames over the network implies additional transmission delays, we also explore the use of JPEG compression at varying qualities and measure its impact on prediction metrics. We show that models with adequate compression can be run in real-time on the cloud while outperforming local detection performance. [less ▲]

Detailed reference viewed: 154 (31 UL)
Full Text
Peer Reviewed
See detailNon-Standard errors
Wolff, Christian UL

Scientific Conference (2023, January)

Detailed reference viewed: 7 (1 UL)
Full Text
Peer Reviewed
See detailATM: Black-box Test Case Minimization based on Test Code Similarity and Evolutionary Search
Pan, Rongqi; Ghaleb, Taher; Briand, Lionel UL

in IEEE/ACM International Conference on Software Engineering (2023)

Detailed reference viewed: 47 (1 UL)
See detailResults - TRB
Bigi, Federico UL

Scientific Conference (2023)

Detailed reference viewed: 21 (3 UL)
Full Text
Peer Reviewed
See detailEfficient Hamiltonian Reduction for Quantum Annealing on SatCom Beam Placement Problem
Dinh, Thinh Q.; Dau, Son Hoang; Lagunas, Eva UL et al

in IEEE International Conference on Communications (ICC), Rome, Italy, May 2023 (2023)

Detailed reference viewed: 11 (1 UL)
Full Text
See detailTowards assimilating SAR data into an anisotropic model of an underground aquifer
Salehian Ghamsari, Sona UL; van Dam, Tonie UL; Hale, Jack UL

Scientific Conference (2023)

In this study, we aim to shed light on the feasibility of assimilating synthetic aperture radar (SAR) data into a partial differential equation-based model of a poroelastic homogeneous aquifer with ... [more ▼]

In this study, we aim to shed light on the feasibility of assimilating synthetic aperture radar (SAR) data into a partial differential equation-based model of a poroelastic homogeneous aquifer with anisotropic hydraulic conductivity (AHC). Although other authors [1] have considered the problem of assimilating SAR data into a poroelastic model that uses an inhomogeneous isotropic random field model for hydraulic conductivity, to the best of our knowledge, our study is the first to consider assimilating SAR data into a poroelastic model with AHC. Our study is inspired by the work of [2] where an aquifer test is performed on the Anderson Junction aquifer in southwestern Utah. Due to the inherent preferential direction of the fractured sandstone at the Anderson Junction site, the ratio of hydraulic conductivity along the principal axes can be on the order of 24 to 1. We build an anisotropically conductive poroelastic finite element model of the Anderson Junction site that can predict the coupled fluid flow and mechanical displacements. Our results show that the effective elastic response of the aquifer on the Earth’s surface has an anisotropic nature driven by the underlying anisotropy in the fluid problem, even when the elasticity problem is assumed to be isotropic. We interpret these results in the context of using SAR data to improve the characterization of aquifer systems, like the Anderson Junction site, with strongly anisotropic behavior. The Doctoral Training Unit Data-driven computational modelling and applications (DRIVEN) is funded by the Luxembourg National Research Fund under the PRIDE programme (PRIDE17/12252781). [1] Amal Alghamdi. Bayesian inverse problems for quasi-static poroelasticity with application to ground water aquifer characterization from geodetic data. PhD thesis, 2020. https://repositories.lib.utexas.edu/handle/2152/86231. [2] Victor M. Heilweil and Paul A. Hsieh. Determining Anisotropic Transmissivity Using a Simplified Papadopulos Method. Groundwater, 44(5):749–753, 2006. 10.1111/j.1745-6584.2006.00210.x [less ▲]

Detailed reference viewed: 85 (19 UL)
Full Text
See detailChildren’s perspectives on their learning experiences during the pandemic
Kirsch, Claudine UL

in Developmental and Adolescent Health (2023), 2(4),

The present paper is based on two online surveys of the mix-method projects COVID-Kids I and II which investigated children’s school experiences, emotional responses, and subjective well-being during the ... [more ▼]

The present paper is based on two online surveys of the mix-method projects COVID-Kids I and II which investigated children’s school experiences, emotional responses, and subjective well-being during the Covid-19 pandemic in 2020 and 2021. The data of the 2020 questionnaire stem from 1,773 children aged 6-16 from Luxembourg, Germany and Switzerland (Kirsch et al., 2021) and those of the second questionnaire from 502 children of the same age group in Luxembourg (Kirsch et al., 2022). The presentation will examine some of the participants’ challenges with home schooling as well as selected outcomes and conclude with a few implications. [less ▲]

Detailed reference viewed: 48 (1 UL)
Full Text
Peer Reviewed
See detailYou Can Dance! Generating Music-Conditioned Dances on Real 3D Scans.
Dupont, Elona UL; Singh, Inder Pal UL; Fuentes, Laura et al

Scientific Conference (2023)

Detailed reference viewed: 39 (1 UL)
Full Text
Peer Reviewed
See detailScalable Coercion-Resistant E-Voting under Weaker Trust Assumptions
Haines, Thomas; Mueller, Johannes UL; Querejeta-Azurmendi, Inigo

in Proceedings of ACM SAC Conference (SAC'23) (2023)

Electronic voting (e-voting) is regularly used in many countries and organizations for legally binding elections. In order to conduct such elections securely, numerous e-voting systems have been proposed ... [more ▼]

Electronic voting (e-voting) is regularly used in many countries and organizations for legally binding elections. In order to conduct such elections securely, numerous e-voting systems have been proposed over the last few decades. Notably, some of these systems were designed to provide coercion-resistance. This property protects against potential adversaries trying to swing an election by coercing voters. Despite the multitude of existing coercion-resistant e-voting systems, to date, only few of them can handle large-scale Internet elections efficiently. One of these systems, VoteAgain (USENIX Security 2020), was originally claimed secure under similar trust assumptions to state-of-the-art e-voting systems without coercion-resistance. In this work, we review VoteAgain's security properties. We discover that, unlike originally claimed, VoteAgain is no more secure than a trivial voting system with a completely trusted election authority. In order to mitigate this issue, we propose a variant of VoteAgain which effectively mitigates trust on the election authorities and, at the same time, preserves VoteAgain's usability and efficiency. Altogether, our findings bring the state of science one step closer to the goal of scalable coercion-resistant e-voting being secure under reasonable trust assumptions. [less ▲]

Detailed reference viewed: 26 (2 UL)
Full Text
Peer Reviewed
See detailEfficient Hessian-based DNN Optimization via Chain-Rule Approximation
Temperoni, Alessandro UL; Dalle Lucca Tosi, Mauro UL; Theobald, Martin UL

in Proceedings of the 6th Joint International Conference on Data Science Management of Data (10th ACM IKDD CODS and 28th COMAD) (2023)

Detailed reference viewed: 36 (8 UL)
Full Text
Peer Reviewed
See detailStacked-Cascode Current Steering Architecture for Gallium Nitride Variable-Gain LNAs
Gonzalez Rios, Jorge Luis UL; Vazquez, Diego; Moreno, Robson et al

in IEEE 14th Latin American Symposium on Circuits and Systems (LASCAS 2023) (2023)

Detailed reference viewed: 31 (2 UL)
Peer Reviewed
See detailLa responsabilité civile du fait des lycanthropes
Calcio, Mathilde UL

in Calcio, Mathilde (Ed.) Horreur et Droit (2023)

Detailed reference viewed: 10 (0 UL)
Full Text
Peer Reviewed
See detailSoK: Secure E-Voting with Everlasting Privacy
Haines, Thomas; Mueller, Johannes UL; Mosaheb, Rafieh UL et al

in Proceedings on Privacy Enhancing Technologies (PoPETs) (2023)

Vote privacy is a fundamental right, which needs to be protected not only during an election, or for a limited time afterwards, but for the foreseeable future. Numerous electronic voting (e-voting ... [more ▼]

Vote privacy is a fundamental right, which needs to be protected not only during an election, or for a limited time afterwards, but for the foreseeable future. Numerous electronic voting (e-voting) protocols have been proposed to address this challenge, striving for everlasting privacy. This property guarantees that even computationally unbounded adversaries cannot break privacy of past elections. The broad interest in secure e-voting with everlasting privacy has spawned a large variety of protocols over the last three decades. These protocols differ in many aspects, in particular the precise security properties they aim for, the threat scenarios they consider, and the privacy-preserving techniques they employ. Unfortunately, these differences are often opaque, making analysis and comparison cumbersome. In order to overcome this non-transparent state of affairs, we systematically analyze all e-voting protocols designed to provide everlasting privacy. First, we illustrate the relations and dependencies between all these different protocols. Next, we analyze in depth which protocols do provide secure and efficient approaches to e-voting with everlasting privacy under realistic assumptions, and which ones do not. Eventually, based on our extensive and detailed treatment, we identify which research problems in this field have already been solved, and which ones are still open. Altogether, our work offers a well-founded reference point for conducting research on secure e-voting with everlasting privacy as well as for future-proofing privacy in real-world electronic elections. [less ▲]

Detailed reference viewed: 140 (20 UL)
Full Text
Peer Reviewed
See detailBeam Splash Mitigation for NGSO Spectrum Coexistence between Feeder and User Downlink
Lagunas, Eva UL; Perez-Neira, Ana; Grotz, Joel et al

in International ITG 26th Workshop on Smart Antennas (WSA), Braunschweig, Germany, 27 Feb - 03 Mar 2023. (2023)

Detailed reference viewed: 22 (3 UL)
Full Text
Peer Reviewed
See detailInk and Paper in the Camp. Ego-Documents of Luxembourger Conscripts in the Soviet Captivity
Ganschow, Inna UL

in Janz, Nina; Scuto, Denis (Eds.) The Impact of War Experiences in Europe (2023)

In the paper by Inna Ganschow, the camp experience in the Soviet Union as a result of forced conscription will be treated, specifically in its artistic processing: secretly written diaries and letters by ... [more ▼]

In the paper by Inna Ganschow, the camp experience in the Soviet Union as a result of forced conscription will be treated, specifically in its artistic processing: secretly written diaries and letters by Luxembourg Wehrmacht soldiers. Contemporary historical research today calls them ego documents – private, handwritten texts of a personal nature. The range of texts to be examined in the lecture ranges from the smuggled out notes and letters that their released comrades took with them to Luxembourg, through diaries, speeches and self-made dictionaries to poems, short stories and drawings, some of which were in the camp and some immediately after the return from Tambov and other camps in the Soviet Union. The focus is on the question of dealing with the thesis of the Auschwitz concentration camp survivor Viktor Frankl, psychiatrist and neurologist from Vienna, that the meaning of camp life - logotherapy - can have a self-healing effect and increase the self-healing powers, which increases the chances of survival. [less ▲]

Detailed reference viewed: 35 (1 UL)
Full Text
Peer Reviewed
See detailLEO-to-User Assignment and Resource Allocation for Uplink Transmit Power Minimization
Nguyen, Kha Hung UL; Ha, Vu Nguyen UL; Lagunas, Eva UL et al

in International ITG 26th Workshop on Smart Antennas (WSA), Braunschweig, Germany, 27 Feb - 03 Mar 2023. (2023)

Detailed reference viewed: 27 (0 UL)
Full Text
Peer Reviewed
See detailDeep Learning-Based Device-Free Localization in Wireless Sensor Networks
Abdullah, Osamah; Al-Hraishawi, Hayder UL; Chatzinotas, Symeon UL

Scientific Conference (2023)

Location-based services are witnessing a rise in popularity owing to their key features of delivering personalized digital experience. The recent developments in wireless sensing techniques make the ... [more ▼]

Location-based services are witnessing a rise in popularity owing to their key features of delivering personalized digital experience. The recent developments in wireless sensing techniques make the realization of device-free localization (DFL) feasible within wireless sensor network (WSN) architectures. The DFL is an emerging technology that utilizes radio signal information for detecting and positioning a passive movable target without attached devices. However, determining the characteristics of the massive raw signals and extracting meaningful discriminative features relevant to the localization are highly intricate tasks due to the different patterns associated with different locations. To overcome these issues, deep learning (DL) techniques can be utilized here owing to their remarkable performance gains in similar practical problems. In this direction, we propose a DFL framework consists of multiple convolutional neural network (CNN) layers along with deep autoencoders based on the restricted Boltzmann machines (RBM) to construct a convolutional deep belief network (CDBN) for features recognition and extracting. Each CNN layer has stochastic pooling to sample down the feature map and reduced the dimensions of the required data without losing important information. This dimensionality reduction can alleviate the heavy computation while ensuring precise localization. The proposed framework is validated using real experimental dataset. The results show that the proposed model is able to achieve a high accuracy of 98% with reduced data dimensions and low signal-to-noise ratios (SNRs). [less ▲]

Detailed reference viewed: 66 (5 UL)
Full Text
Peer Reviewed
See detailXRP-NDN overlay: Improving the Communication Efficiency of Consensus-Validation based Blockchains with an NDN Overlay
Trestioreanu, Lucian Andrei UL; Shbair, Wazen UL; Scheidt de Cristo, Flaviene UL et al

Scientific Conference (2023)

With growing adoption of Distributed Ledger Technologies, their networks must scale while maintaining efficient communication for the underlying consensus and replication mechanisms. New content ... [more ▼]

With growing adoption of Distributed Ledger Technologies, their networks must scale while maintaining efficient communication for the underlying consensus and replication mechanisms. New content distribution concepts like Named Data Networking create opportunities to achieve this goal. We present and evaluate XRP-NDN overlay, a solution to increase communication efficiency for consensus-validation blockchains like XRP Ledger. We send consensus messages over different communication models and show that the chosen model lowers the number of messages at node level to minimum, while maintaining or improving performance by leveraging overlay advantages. [less ▲]

Detailed reference viewed: 32 (7 UL)
Full Text
See detailConnecting culture to geometry - problem based learning across subjects
Ulbrich, Eva; Hosic, Rusmir; Haas, Ben et al

Scientific Conference (2022, December 16)

Symbols are used to visualise and understand abstract mathematical concepts. According to Duval (1999), visualisations are the core of understanding mathematics and creating a visualisation involves ... [more ▼]

Symbols are used to visualise and understand abstract mathematical concepts. According to Duval (1999), visualisations are the core of understanding mathematics and creating a visualisation involves reasoning and construction. This is also common in culture, for example, in religions where internalisation and externalisation are used for reflection (Vicini, 2017) that might be a visualisation such as geometric art. We want to create learning situations for problem based learning useful for various subjects (i.e., mathematics, history, culture, arts) in primary school based on geometrical shapes. Geometrical shapes are among symbols used in human beliefs (e.g., the cross in Christianity, the star of David in Judaism or the wheel of law in Buddhism) and can be found on buildings and several school books. Visualisations, e.g. in Islam, can be based on polygons, stars or rosettas (Abdullahi & Embi, 2013). Lesson plans combining cultural subjects such as history or art with mathematics are not common, but we believe there is a visible connection with geometric art. Therefore, we aim to find out whether teachers from subjects with a cultural background are interested in such lesson plans and which attributes they should have to combine the subject, geometry and technology in a maker-centred learning experience (Michael & Jones, 2020). We plan on a qualitative approach, first introducing an activity and then interviewing primary school children and their teachers for their perceptions and learnings. For a first orientation of attributes and teacher needs, we created an activity to develop bookmarks in 2D and 3D using chequered paper and the 3D modelling software TinkerCAD for over 50 primary school students. The lesson plan and comments of the student's teachers hinting towards attributes will be presented, and future steps will be discussed. [less ▲]

Detailed reference viewed: 32 (7 UL)
Full Text
See detailOn Improving Slant Wet delays for Tracking Severe Weather Events: An evaluation During Two Storms in Europe
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Duman, Huseyin et al

Scientific Conference (2022, December 14)

Climate change has led to an increase in the frequency and severity of weather events with intense precipitation and, subsequently, a greater susceptibility of communities around the world to flash ... [more ▼]

Climate change has led to an increase in the frequency and severity of weather events with intense precipitation and, subsequently, a greater susceptibility of communities around the world to flash flooding. Networks of ground-based Global Navigation Satellite System (GNSS) stations enable the measurement of integrated water vapor along slant pathways, providing three-dimensional (3D) water vapor distributions at low-cost and in real-time. This makes these data a valuable complementary source of information for tracking storm events and predicting their paths. However, it is well established that residual modelling errors and multipath (MP) effects at GNSS stations do impact incoming signals, especially at low elevations and during storms when the atmospheric conditions change rapidly. Until now, the bulk of GNSS products for meteorology are estimates of the more conventional zenith total delays and horizontal gradients, but these products may not be most appropriate for determining 3D distributions of water vapor during convective storm events. In this study we investigate the impact of residual-phase-corrected and multipath-corrected slant wet delay (SWD) estimates on tracking extreme weather events using two events in Europe that led to flooding, damage to property and loss of life. We employed Precise Point Positioning (PPP) with integer ambiguity resolution to generate station-specific MP correction maps. The spatial stacking was 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. In our analysis we recovered the one-way SWD by adding GNSS post-fit phase residuals, representing the non-isotropic component of the SWD, i.e., the higher-order inhomogeneity. Using the derived MP maps in a final step, the one-way SWD were improved to employ them for the analysis of the weather event. Moreover, we validated the SWD between ground-based water-vapor radiometry and GNSS-derived SWD for different elevation angles. Furthermore, the spatio-temporal fluctuations in the SWD as measured by GNSS closely mirrored the moisture field from the ERA5 re-analysis associated with this severe weather event [less ▲]

Detailed reference viewed: 25 (1 UL)
Full Text
Peer Reviewed
See detailSmart charging of EVs: Would you share your data for money?
Marxen, Hanna UL; Ansarin, Mohammad

Scientific Conference (2022, December 11)

Many governments worldwide aim to eventually replace most combustion engines on the roads with electric vehicles (EVs). But this change causes an additional load on the electrical grid, especially if many ... [more ▼]

Many governments worldwide aim to eventually replace most combustion engines on the roads with electric vehicles (EVs). But this change causes an additional load on the electrical grid, especially if many EVs are charged simultaneously at peak times. Smart charging is a solution to better distribute the load throughout the day or night, while considering consumer preferences. For home charging, the idea is for EV users to always plug in their EVs when they are at home, and for the energy supplier to then decide when to charge which EV. By using (sensitive) consumer data, such as charging history, location of the smartphone and calendar information, the energy supplier can plan and optimize the charging of the EVs even better. In a survey, we seek to understand which of these data consumers are willing to share for smart charging, and what factors, such as privacy concerns and data sharing habits, influence this decision. Furthermore, in an experiment within the survey, we investigate whether consumers are more willing to share data if they receive monetary incentives. Our research design is based on the theoretical framework of Barth and de Jong (2017). 20 participants took part in the pretest, after which we adjusted the survey. We then shared the survey through various channels. [less ▲]

Detailed reference viewed: 65 (2 UL)
Full Text
See detailHigh-Performance Computing for the simulation of particles with the Discrete Element Method
Besseron, Xavier UL

Scientific Conference (2022, December 09)

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: 13 (2 UL)
Full Text
See detail“When publics co-produce history in museums: skills, methodologies and impact of participation”
Cauvin, Thomas UL

Scientific Conference (2022, December 07)

Detailed reference viewed: 23 (0 UL)
Full Text
Peer Reviewed
See detailRate Splitting Multiple Access for Cognitive Radio GEO-LEO Co-Existing Satellite Networks
Khan, Wali Ullah UL; Ali, Zain; Lagunas, Eva et al

Scientific Conference (2022, December 07)

Low Earth orbit (LEO) satellite communication has drawn particular attention recently due to its high data rate services and low round-trip latency. It is low-cost to launch and can provide global ... [more ▼]

Low Earth orbit (LEO) satellite communication has drawn particular attention recently due to its high data rate services and low round-trip latency. It is low-cost to launch and can provide global coverage. However, the spectrum scarcity might be one of the critical challenges in the growth of LEO satellites, impacting severe restrictions on the development of ground-space integrated networks. To address this issue, we propose rate splitting multiple access (RSMA) for cognitive radio (CR) enabled nongeostationary orbit (GEO)-LEO coexisting satellite network. In particular, this work aims to maximize the system's sum rate by simultaneously optimizing the power allocation and subcarrier beam assignment of LEO satellite communication while restricting the interference temperature to GEO satellite users. The problem of sum rate maximization is formulated as non-convex and a Global optimal solution is challenging to obtain. Therefore, we first employ the successive convex approximation technique to reduce the complexity and make the problem more tractable. Then for the power allocation, we exploit Karush–Kuhn–Tucker (KKT) condition and adopt an efficient algorithm based on the greedy approach for subcarrier beam assignment. We also propose two suboptimal schemes with fixed power allocation and random subcarrier beam assignment. [less ▲]

Detailed reference viewed: 33 (10 UL)
Peer Reviewed
See detailSchool tracking in Luxembourg: the longitudinal impact of student characteristics and school composition
Pit-Ten Cate, Ineke UL; Ottenbacher, Martha UL; Alieva, Aigul et al

Scientific Conference (2022, December 05)

Research question: The current study aimed to investigate the influence of student and school level factors on school tracking in secondary education. We were especially interested in the association ... [more ▼]

Research question: The current study aimed to investigate the influence of student and school level factors on school tracking in secondary education. We were especially interested in the association between student characteristics and school composition in Grade 3 and school track in Grade 9. Data source: Data were collected as part of the Luxembourg school monitoring programme “Épreuves Standardisées” (ÉpStan; Fischbach et al., 2014). The study cohort include all students enrolled in the Luxembourg public education system in Grade 3 in November 2013 combined with data from the same students in Grade 9 in November 2017-2019 for students following advanced or regular educational pathways, completed with data from November 2020 and 2021 for students that repeated once or twice (N≈3600). Theoretical approach: The study draws upon theoretical frameworks and empirical findings (e.g., Boudon, 1974; Bourdieu, 1984), that have demonstrated students´ socio-demographic characteristics are associated with (dis)advantages for specific groups of students in education systems as well as more recent work focusing on school composition (e.g., Baumert et al., 2006), especially as tracked school systems are known to be prone to social segregation (e.g., Hadjar & Gross, 2016). To date, most research on school segregation in tracked education systems such as Luxembourg has focused on individual student´s characteristics. However, with increasing heterogeneity of student cohorts and known differences in educational opportunities related to the social and ethnic composition of the school’s student body (e.g., Thrupp et al., 2002), the current research extents the existing literature by considering both individual (including prior academic achievement and socio-demographic characteristics) and school level factors (mean academic level and percentage of students from lower socio-economic and migration background) in predicting school track placement. Main findings: Results of a multilevel random effect logistic regression analysis in which we estimated marginal effects on the probability to be placed in the highest, middle or lowest track in Luxembourg show that even after controlling for student´s academic achievement, track placement is affected by the gender and socio-economic background of the student, whereby boys and students from low SES families have less chance to be placed in the highest track. The association with socio-economic background is not only visible on the student level but also on school level, whereby students attending primary schools with a higher percentage of low SES families have less chance to be orientated to the higher track compared to the middle track, regardless of the student´ individual academic performance. [less ▲]

Detailed reference viewed: 123 (14 UL)
Full Text
Peer Reviewed
See detailGEO Payload Power Minimization: Joint Precoding and Beam Hopping Design
Ha, Vu Nguyen UL; Nguyen, Ti Ti; Lagunas, Eva UL et al

in Proceedings of IEEE Global Communications Conference GLOBECOM 2022 (2022, December 05)

This paper aims to determine linear precoding (LP) vectors, beam hopping (BH), and discrete DVB-S2X transmission rates jointly for the GEO satellite communication systems to minimize the payload power ... [more ▼]

This paper aims to determine linear precoding (LP) vectors, beam hopping (BH), and discrete DVB-S2X transmission rates jointly for the GEO satellite communication systems to minimize the payload power consumption and satisfy ground users’ demands within a time window. Regarding constraint on the maximum number of illuminated beams per time slot, the technical requirement is formulated as a sparse optimization problem in which the hardware-related beam illumination energy is modeled in a sparsity form of the LP vectors. To cope with this problem, the compressed sensing method is employed to transform the sparsity parts into the quadratic form of precoders. Then, an iterative window-based algorithm is developed to update the LP vectors sequentially to an efficient solution. Additionally, two other two-phase frameworks are also proposed for comparison purposes. In the first phase, these methods aim to determine the MODCOD transmission schemes for users to meet their demands by using a heuristic approach or DNN tool. In the second phase, the LP vectors of each time slot will be optimized separately based on the determined MODCOD schemes. [less ▲]

Detailed reference viewed: 32 (8 UL)
Full Text
Peer Reviewed
See detailCODEBERT-NT: code naturalness via CodeBERT
Khanfir, Ahmed UL; Jimenez, Matthieu UL; Papadakis, Mike UL et al

in 22nd IEEE International Conference on Software Quality, Reliability and Security (QRS'22) (2022, December 05)

Much of recent software-engineering research has investigated the naturalness of code, the fact that code, in small code snippets, is repetitive and can be predicted using statistical language models like ... [more ▼]

Much of recent software-engineering research has investigated the naturalness of code, the fact that code, in small code snippets, is repetitive and can be predicted using statistical language models like n-gram. Although powerful, training such models on large code corpus can be tedious, time consuming and sensitive to code patterns (and practices) encountered during training. Consequently, these models are often trained on a small corpus and thus only estimate the language naturalness relative to a specific style of programming or type of project. To overcome these issues, we investigate the use of pre-trained generative language models to infer code naturalness. Pre-trained models are often built on big data, are easy to use in an out-of-the-box way and include powerful learning associations mechanisms. Our key idea is to quantify code naturalness through its predictability, by using state-of-the-art generative pre-trained language models. Thus, we suggest to infer naturalness by masking (omitting) code tokens, one at a time, of code-sequences, and checking the models’ability to predict them. We explore three different predictability metrics; a) measuring the number of exact matches of the predictions, b) computing the embedding similarity between the original and predicted code, i.e., similarity at the vector space, and c) computing the confidence of the model when doing the token completion task regardless of the outcome. We implement this workflow, named CODEBERT-NT, and evaluate its capability to prioritize buggy lines over non-buggy ones when ranking code based on its naturalness. Our results, on 2,510 buggy versions of 40 projects from the SmartShark dataset, show that CODEBERT-NT outperforms both, random-uniform and complexity-based ranking techniques, and yields comparable results to the n-gram models. [less ▲]

Detailed reference viewed: 64 (9 UL)
Full Text
Peer Reviewed
See detailAdaptive Beam Pattern Selection and Resource Allocation for NOMA-Based LEO Satellite Systems
Wang, Anyue UL; Lei, Lei; Hu, Xin et al

Scientific Conference (2022, December 04)

Detailed reference viewed: 46 (8 UL)
Full Text
Peer Reviewed
See detailDynamic Beam-Layout Design for MEO High Throughput Satellite Systems
Chaker, Haythem UL; Chougrani, Houcine UL; Alves Martins, Wallace UL et al

Scientific Conference (2022, December 04)

We propose a traffic-oriented beam-layout optimization framework for a medium Earth orbit (MEO) high throughput satellite (HTS) system. The designed beam-layout plans have the objective of dynamic traffic ... [more ▼]

We propose a traffic-oriented beam-layout optimization framework for a medium Earth orbit (MEO) high throughput satellite (HTS) system. The designed beam-layout plans have the objective of dynamic traffic load balancing with minimal radio resource management. We model and evaluate the high directivity and the high reconfigurability capabilities of next-generation HTS systems that are equipped with a processing power on board. The resulting payload flexibility is compared numerically against the on-ground counterpart. Adequate key performance indicators, such as the Jain’s fairness index, the load distribution gap and optimization convergence time, are used to benchmark the system against state-of-the-art solutions. Results show that a dynamic HTS in MEO is capable of efficiently attaining high quality load balancing performance under realistic spatiotemporally varying traffic demands. [less ▲]

Detailed reference viewed: 107 (22 UL)
See detailThe Legality of EU Sanctions under International Investment Agreements
Garcia Olmedo, Javier UL

Scientific Conference (2022, December 02)

Detailed reference viewed: 25 (0 UL)
Full Text
Peer Reviewed
See detailFaster and Cheaper Energy Demand Forecasting at Scale
Bernier, Fabien UL; Jimenez, Matthieu UL; Cordy, Maxime UL et al

in Has it Trained Yet? Workshop at the Conference on Neural Information Processing Systems (2022, December 02)

Energy demand forecasting is one of the most challenging tasks for grids operators. Many approaches have been suggested over the years to tackle it. Yet, those still remain too expensive to train in terms ... [more ▼]

Energy demand forecasting is one of the most challenging tasks for grids operators. Many approaches have been suggested over the years to tackle it. Yet, those still remain too expensive to train in terms of both time and computational resources, hindering their adoption as customers behaviors are continuously evolving. We introduce Transplit, a new lightweight transformer-based model, which significantly decreases this cost by exploiting the seasonality property and learning typical days of power demand. We show that Transplit can be run efficiently on CPU and is several hundred times faster than state-of-the-art predictive models, while performing as well. [less ▲]

Detailed reference viewed: 78 (7 UL)
Full Text
See detailInterpretation and distinction between labour exploitation in the context of trafficking in human beings and particularly exploitative working conditions under the Employers Sanctions Directive
Sommarribas, Adolfo UL

Scientific Conference (2022, December 01)

This presentation presents the findings of the EMN Luxembourg inform entitled Interpretation and distinction between labour exploitation in the context of trafficking in human beings and particularly ... [more ▼]

This presentation presents the findings of the EMN Luxembourg inform entitled Interpretation and distinction between labour exploitation in the context of trafficking in human beings and particularly exploitative working conditions under the Employers Sanctions Directive and the conclusions of the Benelux thematic day entitled "Human Trafficking" on 11 October 2022 that took place under the Luxembourgish presidency of the Benelux. [less ▲]

Detailed reference viewed: 22 (0 UL)
Full Text
Peer Reviewed
See detailDRIVE-B5G: A Flexible and Scalable Platform Testbed for B5G-V2X Networks
Djaidja, Taki Eddine Toufik; Brik, Bouziane; Boualouache, Abdelwahab UL et al

in DRIVE-B5G: A Flexible and Scalable Platform Testbed for B5G-V2X Networks (2022, December)

Unlike previous mobile networks, 5G and beyond (B5G) networks are expected to be the key enabler of various vertical industries such as eHealth, intelligent transportation, and Industrial IoT verticals ... [more ▼]

Unlike previous mobile networks, 5G and beyond (B5G) networks are expected to be the key enabler of various vertical industries such as eHealth, intelligent transportation, and Industrial IoT verticals. To support that, B5G networks enable to sharing of common physical resources (radio, computation, network) among different tenants, thanks to network slicing concept and network softwarization technologies, including Software Defined Networking (SDN) and Network Function Virtualization (NFV). Therefore, new research challenges related to B5G networks have emerged, such as resources management and orchestration, service chaining, security, and QoS management. However, there is a lack of a realistic platform enabling researchers to design and validate their solutions effectively, since B5G networks are still in their early stages. In this paper, we first discuss the different methods for deploying realistic B5G platforms for the V2X vertical, including the key B5G technologies. Then, we describe DRIVE-B5G, a novel platform that serves as an end-to-end test-bed to emulate a vehicular network environment, allowing researchers to provide proof of concept, validate, and evaluate their research approaches. [less ▲]

Detailed reference viewed: 29 (4 UL)
Full Text
Peer Reviewed
See detailEdge Computing-enabled Intrusion Detection for C-V2X Networks using Federated Learning
Selamnia, Aymene; Brik, Bouziane; Senouci, Sidi-Mohammed et al

in The 2022 IEEE Global Communications Conference (GLOBECOM) (2022, December)

Intrusion detection systems (IDS) have already demonstrated their effectiveness in detecting various attacks in cellular vehicle-to-everything (C-V2X) networks, especially when using machine learning (ML ... [more ▼]

Intrusion detection systems (IDS) have already demonstrated their effectiveness in detecting various attacks in cellular vehicle-to-everything (C-V2X) networks, especially when using machine learning (ML) techniques. However, it has been shown that generating ML-based models in a centralized way consumes a massive quantity of network resources, such as CPU/memory and bandwidth, which may represent a critical issue in such networks. To avoid this problem, the new concept of Federated Learning (FL) emerged to build ML-based models in a distributed and collaborative way. In such an approach, the set of nodes, e.g., vehicles or gNodeB, collaborate to create a global ML model trained across these multiple decentralized nodes, each one with its respective data samples that are not shared with any other nodes. In this way, FL enables, on the one hand, data privacy since sharing data with a central location is not always feasible and, on the other hand, network overhead reduction. This paper designs a new IDS for C-V2X networks based on FL. It leverages edge computing to not only build a prediction model in a distributed way but also to enable low-latency intrusion detection. Moreover, we build our FL-based IDS on top of the well-known CIC-IDS2018 dataset, which includes the main network attacks. Noting that, we first perform feature engineering on the dataset using the ANOVA method to consider only the most informative features. Simulation results show the efficiency of our system compared to the existing solutions in terms of attack detection accuracy while reducing network resource consumption. [less ▲]

Detailed reference viewed: 32 (1 UL)
See detailLes nouvelles infractions de droit pénal sexuel : le voyeurisme, la diffusion non consentie de contenus à caractère sexuel, l’approche d’un mineur à des fins sexuelles et l’outrage public aux bonnes moeurs
Delhaise, Elise UL

in Delhaise, Elise; Colette-Basecqz, Nathalie; Henrion, Thomas (Eds.) et al Actualités en matière de droit pénal sexuel (2022, December)

Detailed reference viewed: 30 (0 UL)
Full Text
Peer Reviewed
See detailDRIVE-B5G: A Flexible and Scalable Platform Testbed for B5G-V2X Networks
Djaidja, Taki Eddine Toufik; Brik, Bouziane; Boualouache, Abdelwahab UL et al

in DRIVE-B5G: A Flexible and Scalable Platform Testbed for B5G-V2X Networks (2022, December)

Unlike previous mobile networks, 5G and beyond (B5G) networks are expected to be the key enabler of various vertical industries such as eHealth, intelligent transportation, and Industrial IoT verticals ... [more ▼]

Unlike previous mobile networks, 5G and beyond (B5G) networks are expected to be the key enabler of various vertical industries such as eHealth, intelligent transportation, and Industrial IoT verticals. To support that, B5G networks enable to sharing of common physical resources (radio, computation, network) among different tenants, thanks to network slicing concept and network softwarization technologies, including Software Defined Networking (SDN) and Network Function Virtualization (NFV). Therefore, new research challenges related to B5G networks have emerged, such as resources management and orchestration, service chaining, security, and QoS management. However, there is a lack of a realistic platform enabling researchers to design and validate their solutions effectively, since B5G networks are still in their early stages. In this paper, we first discuss the different methods for deploying realistic B5G platforms for the V2X vertical, including the key B5G technologies. Then, we describe DRIVE-B5G, a novel platform that serves as an end-to-end test-bed to emulate a vehicular network environment, allowing researchers to provide proof of concept, validate, and evaluate their research approaches. [less ▲]

Detailed reference viewed: 33 (2 UL)
Full Text
Peer Reviewed
See detailHybrid Active-Passive Reconfigurable IntelligentSurface-Assisted UAV Communications
Nguyen, Nhan T.; Nguyen, V.-Dinh; Wu, Qingqing et al

Poster (2022, December)

We consider a novel hybrid active-passive reconfigurable intelligent surface (RIS)-assisted unmanned aerial vehicle (UAV) air-ground communications system. Unlike the conventional passive RIS, the hybrid ... [more ▼]

We consider a novel hybrid active-passive reconfigurable intelligent surface (RIS)-assisted unmanned aerial vehicle (UAV) air-ground communications system. Unlike the conventional passive RIS, the hybrid RIS is equipped with a few active elements to not only reflect but also amplify the incident signals for significant performance improvement. Towards a fairness design, our goal is to maximize the minimum rate among users through jointly optimizing the location and power allocation of the UAV and the RIS reflecting/amplifying coefficients. The formulated optimization problem is nonconvex and challenging, which is efficiently solved via block coordinate descend and successive convex approximation. Our numerical results show that a hybrid RIS requires only 4 active elements and a power budget of 0 dBm to achieve an improvement of 52.08% in the minimum rate, while that achieved by a conventional passive RIS with the same total number of elements is only 18.06%. [less ▲]

Detailed reference viewed: 15 (0 UL)