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See detailLe vieillissement actif dans le contexte de la diversité culturelle au Luxembourg
Albert, Isabelle UL; Hoffmann, Martine; Vandenbosch, Petra et al

Report (2021)

Le point de départ du projet PAN-VAL « Vieillissement actif au Luxembourg », qui a été mené à bien en collaboration étroite avec l’Université du Luxembourg et GERO, était la question de savoir dans quelle ... [more ▼]

Le point de départ du projet PAN-VAL « Vieillissement actif au Luxembourg », qui a été mené à bien en collaboration étroite avec l’Université du Luxembourg et GERO, était la question de savoir dans quelle mesure les activités sociales et les offres sont utilisées par une population diversifiée. Dans le cadre de cette étude, les besoins et les attentes de personnes de plus de 50 ans (Luxembourgeois(es) et non-Luxembourgeois(es)) ont été étudiés en ce qui concerne leurs réseaux sociaux, leur intégration sociale, leurs activités de loisir au sein de leur communauté et leur sentiment d’appartenance ainsi que leur satisfaction avec divers domaines de la vie. En même temps, l’objectif de l’étude était de déterminer quels facteurs favorisent une participation et ce qui empêche les personnes de participer aux offres de loisirs publiques. Dans la brochure présente ont été réunis les résultats les plus importants des études partielles quantitatives et qualitatives suivis d’indications pour l’organisation d’off res. On y présentera des éléments afin de mieux intégrer les personnes âgées issues de l’immigration et de mettre au point des services pour un vieillissement actif d’un groupe cible toujours plus diversifié. Ainsi, cette brochure s’adresse à tous ceux qui s’occupent de l’organisation d’offres pour des activités sociales – pour personnes âgées, mais pas uniquement – dans le contexte de la diversité culturelle. [less ▲]

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See detailKijken en Kennis: Een zeventiende-eeuws constcamer-schilderij
Koeleman, Floor Anna UL

in Wonderkamer: Magazine voor Wetenschapsgeschiedenis (2021), 4

Wie wil doordringen tot de diepere betekenis van een constcamer schilderij, moet leren kijken. Floor Koeleman neemt ons mee naar de kleinste details, want overal schuilt betekenis in. Bovendien vertellen ... [more ▼]

Wie wil doordringen tot de diepere betekenis van een constcamer schilderij, moet leren kijken. Floor Koeleman neemt ons mee naar de kleinste details, want overal schuilt betekenis in. Bovendien vertellen de schilderijen uit de vroegmoderne tijd ons veel over hoe kennis in de zeventiende eeuw tot stand kwam. [less ▲]

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See detailLearning-Based Multiplexing of Grant-Based and Grant-Free Heterogeneous Services with Short Packets
Tran, Duc Dung UL; Sharma, Shree Krishna; Chatzinotas, Symeon UL et al

in Proceedings of 2021 IEEE Global Communications Conference (GLOBECOM) (2021, December)

In this paper, we investigate the multiplexing of grant-based (GB) and grant-free (GF) device transmissions in an uplink heterogeneous network (HetNet), namely GB-GF HetNet, where the devices transmit ... [more ▼]

In this paper, we investigate the multiplexing of grant-based (GB) and grant-free (GF) device transmissions in an uplink heterogeneous network (HetNet), namely GB-GF HetNet, where the devices transmit their information using low-rate short data packets. Specifically, GB devices are granted unique time-slots for their transmissions. In contrast, GF devices can randomly select time-slots to transmit their messages utilizing the GF non-orthogonal multiple access (NOMA), which has emerged as a promising enabler for massive access and reducing access latency. However, random access (RA) in the GF NOMA can cause collisions and severe interference, leading to system performance degradation. To overcome this issue, we propose a multiple access (MA) protocol based on reinforcement learning for effective RA slots allocation. The proposed learning method aims to guarantee that the GF devices do not cause any collisions to the GB devices and the number of GF devices choosing the same time-slot does not exceed a predetermined threshold to reduce the interference. In addition, based on the results of the RA slots allocation using the proposed method, we derive the approximate closed-form expressions of the average decoding error probability (ADEP) for all devices to characterize the system performance. Our results presented in terms of access efficiency (AE), collision probability (CP), and overall ADEP (OADEP), show that our proposed method can ensure a smooth operation of the GB and GF devices within the same network while significantly minimizing the collision and interference among the device transmissions in the GB-GF HetNet. [less ▲]

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See detailLe Luxembourg et l’institutionnalisation de la justice internationale : un exemple de politique juridique extérieure (1863-1940)
Erpelding, Michel UL

in Fritz, Vera; Scuto, Denis; Wingerter, Elisabeth (Eds.) Histoire de la Justice au Luxembourg (1795 à nos jours) : Institutions, organisation, acteurs (2021)

Based on both printed and archival sources, chapter examines the foreign policy of Luxembourg in the field of international adjudication, from the 1860s, when Luxembourg had its first experience with ... [more ▼]

Based on both printed and archival sources, chapter examines the foreign policy of Luxembourg in the field of international adjudication, from the 1860s, when Luxembourg had its first experience with international arbitration, until the interwar period, when Luxembourg sought to preserve its independence by systematically signing arbitration treaties with Western states. [less ▲]

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See detailAn overview of generic tools for information-theoretic secrecy performance analysis over wiretap fading channels
Kong, Long UL; Ai, Yun; Lei, Lei UL et al

in EURASIP Journal on Wireless Communications and Networking volume (2021), (1), 194

Physical layer security (PLS) has been proposed to afford an extra layer of security on top of the conventional cryptographic techniques. Unlike the conventional complexity-based cryptographic techniques ... [more ▼]

Physical layer security (PLS) has been proposed to afford an extra layer of security on top of the conventional cryptographic techniques. Unlike the conventional complexity-based cryptographic techniques at the upper layers, physical layer security exploits the characteristics of wireless channels, e.g., fading, noise, interference, etc., to enhance wireless security. It is proved that secure transmission can benefit from fading channels. Accordingly, numerous researchers have explored what fading can offer for physical layer security, especially the investigation of physical layer security over wiretap fading channels. Therefore, this paper aims at reviewing the existing and ongoing research works on this topic. More specifically, we present a classification of research works in terms of the four categories of fading models: (i) small-scale, (ii) large-scale, (iii) composite, and (iv) cascaded. To elaborate these fading models with a generic and flexible tool, three promising candidates, including the mixture gamma (MG), mixture of Gaussian (MoG), and Fox’s H-function distributions, are comprehensively examined and compared. Their advantages and limitations are further demonstrated via security performance metrics, which are designed as vivid indicators to measure how perfect secrecy is ensured. Two clusters of secrecy metrics, namely (i) secrecy outage probability (SOP), and the lower bound of SOP; and (ii) the probability of nonzero secrecy capacity (PNZ), the intercept probability, average secrecy capacity (ASC), and ergodic secrecy capacity, are displayed and, respectively, deployed in passive and active eavesdropping scenarios. Apart from those, revisiting the secrecy enhancement techniques based on Wyner’s wiretap model, the on-off transmission scheme, jamming approach, antenna selection, and security region are discussed. [less ▲]

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See detailThe Impact of the Asset Purchase Programme on Systemic Risk in the Euro Area: Is There a Threat?
Chavarro Sanchez, Leidy; Nadal De Simone, Francisco; Lehnert, Thorsten UL

E-print/Working paper (2021)

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See detailCompétences en littératie numérique et pensée computationnelle des élèves de huitième année – Principales conclusions d’ICILS 2018
Boualam, Rachid UL; Lomos, Catalina; Fischbach, Antoine UL

in LUCET; SCRIPT (Eds.) Rapport national sur l’éducation au Luxembourg 2021 (2021)

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See detailA Systematic Literature Review of Empirical Methods and Risk Representation in Usable Privacy and Security Research
Distler, Verena UL; Fassl, Matthias; Habib, Hana et al

in ACM Transactions on Computer-Human Interaction (2021), 28(6), 50

Usable privacy and security researchers have developed a variety of approaches to represent risk to research participants. To understand how these approaches are used and when each might be most ... [more ▼]

Usable privacy and security researchers have developed a variety of approaches to represent risk to research participants. To understand how these approaches are used and when each might be most appropriate, we conducted a systematic literature review of methods used in security and privacy studies with human participants. From a sample of 633 papers published at five top conferences between 2014 and 2018 that included keywords related to both security/privacy and usability, we systematically selected and analyzed 284 full-length papers that included human subjects studies. Our analysis focused on study methods; risk representation; the use of prototypes, scenarios, and educational intervention; the use of deception to simulate risk; and types of participants. We discuss benefits and shortcomings of the methods, and identify key methodological, ethical, and research challenges when representing and assessing security and privacy risk. We also provide guidelines for the reporting of user studies in security and privacy. [less ▲]

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See detailGender Differences and Extreme Events
Lehnert, Thorsten UL

Scientific Conference (2021, December)

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See detailIn-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctions
Kölzer, Jonas; Moors, Kristof; Jalil, Abdur Rehman et al

in Communications Materials (2021)

Topological surface states of three-dimensional topological insulator nanoribbons and their distinct magnetoconductance properties are promising for topoelectronic applications and topological quantum ... [more ▼]

Topological surface states of three-dimensional topological insulator nanoribbons and their distinct magnetoconductance properties are promising for topoelectronic applications and topological quantum computation. A crucial building block for nanoribbon-based circuits are three-terminal junctions. While the transport of topological surface states on a planar boundary is not directly affected by an in-plane magnetic field, the orbital effect cannot be neglected when the surface states are confined to the boundary of a nanoribbon geometry. Here, we report on the magnetotransport properties of such three-terminal junctions. We observe a dependence of the current on the in-plane magnetic field, with a distinct steering pattern of the surface state current towards a preferred output terminal for different magnetic field orientations. We demonstrate that this steering effect originates from the orbital effect, trapping the phase-coherent surface states in the different legs of the junction on opposite sides of the nanoribbon and breaking the left-right symmetry of the transmission across the junction. The reported magnetotransport properties demonstrate that an in-plane magnetic field is not only relevant but also very useful for the characterization and manipulation of transport in three-dimensional topological insulator nanoribbon-based junctions and circuits, acting as a topoelectric current switch. [less ▲]

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See detailEine Frage der Haltung – Spannungsfelder des Unterrichtens in einer digitalen Welt
Pause, Johannes UL; Harion, Dominic UL

in Nationaler Bildungsbericht Luxemburg 2021 (2021)

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See detailCompte rendu de Dirk Richtus, Naar de hel met Hitler
Brüll, Christoph UL

in Contemporanea (2021), (4),

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See detailDer Einsatz digitaler Technologien zur Messung der Bewegungsaktivitäten von Kindern und Jugendlichen – das Projekt „Physical Activity of Children and Youth in Luxembourg” (PALUX)
Eckelt, Melanie; Hutmacher, Djenna; Bund, Andreas UL et al

in Luxembourg Center for Educational Testing (LUCET); Universität Luxemburg; Service de Coordination de la Recherche et de l‘Innovation pédagogiques et technologiques (SCRIPT) (Eds.) Nationaler Bildungsbericht Luxemburg 2021 (2021)

In einer technisierten und digitalisierten Welt wird Bewegung häufig zu einer Randerscheinung. So zeigen aktuelle Studien, dass das verstärkte Nutzen digitaler Medien bei Kindern und Jugendlichen zu ... [more ▼]

In einer technisierten und digitalisierten Welt wird Bewegung häufig zu einer Randerscheinung. So zeigen aktuelle Studien, dass das verstärkte Nutzen digitaler Medien bei Kindern und Jugendlichen zu reduzierten Bewegungsaktivitäten führt (z. B. Kaiser & Jovy et al., 2017; Spengler et al., 2016). Gleichzeitig ist aus medizinischer Sicht jedoch ein Mindestmaß an Bewegung unabdingbar für die Gesundheiterhaltung; die Weltgesundheitsorganisation spricht von einer Stunde moderat anstrengender Aktivität täglich (WHO, 2010). Diesen (vermeintlichen) Gegensatz zwischen einem digitalen Lebensumfeld und ausreichender Bewegung aufzulösen und im besten Fall umzukehren wird in Zukunft wohl eine bedeutsame Bildungsaufgabe der Schule insgesamt und des Sportunterrichts im Besonderen sein. [less ▲]

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See detailBefunde aus dem nationalen Bildungsmonitoring ÉpStan vor dem Hintergrund der COVID-19 Pandemie (Supplement)
Fischbach, Antoine UL; Colling, Joanne UL; Levy, Jessica UL et al

in LUCET; SCRIPT (Eds.) Nationaler Bildungsbericht Luxemburg 2021 (2021)

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See detailIn pursuit of the best standards: what material and legal interoperability for NATO forces?
Zarkan, Laetitia UL

in NATO Legal Gazette (2021), (42), 36-52

In the wake of the increasing development and use of space systems, alliances and partnerships appear to be the solution for minimising the risk of harmful interferences, reducing costs, and further apply ... [more ▼]

In the wake of the increasing development and use of space systems, alliances and partnerships appear to be the solution for minimising the risk of harmful interferences, reducing costs, and further apply advancement in new technologies. The military uses space systems to support a wide range of activities such as intelligence gathering, telecommunications, tracking, positioning, navigation, and early warnings to detect ballistic missile launches. Interoperability is bringing under the spotlight the disparities between technologically advanced and less-advanced States. Only a few States are able to produce and access space technologies individually and subsequently determine the standards and operational parameters. The utilisation of space systems requires like-minded operators who collectively agree on the same idea of norms of behaviours, threat characterisation, and thresholds for interference. This article critically engages with the idea that interoperability poses legal problems and an unfair burden on the less developed members of the Alliance. This article presents a two-fold analysis of interoperability challenges in utilising space equipment, with particular attention to joint responsibility during hostilities. Ensuring space systems' functionality appears necessary to preserve the operational effectiveness of the space infrastructure used by different operators. In turn, this entails the existence of interoperable systems and compliance with standards and regulations unilaterally set by the most technologically advanced States and sometimes not collectively agreed or developed. If allies want to operate the same equipment, they need to thwart compatibility issues from both a technical and legal perspective. In focusing on a small number of technologically advanced States to fix the interoperability standards, other States are deprived of a certain degree of autonomy and protection as they will have to share proprietary information. Moreover, less developed States are not able to fully control their operations or decide their responsibility for joint activities. [less ▲]

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See detailThe impact of maternal child- and self-oriented pain-related injustice appraisals upon maternal attention to child pain, attention to anger, and pain-attending behavior
Baert, Fleur; van Ryckeghem, Dimitri UL; Sanchez-Lopez, Alvaro et al

in British Journal of Pain (2021)

Objectives The current study investigated the role of maternal child- and self-oriented injustice appraisals about child pain in understanding maternal attention for child pain and adult anger cues and ... [more ▼]

Objectives The current study investigated the role of maternal child- and self-oriented injustice appraisals about child pain in understanding maternal attention for child pain and adult anger cues and pain-attending behavior. Methods Forty-four children underwent a painful cold pressor task (CPT) while their mother observed. Eye tracking was used to measure maternal attention to child pain and adult anger cues. Initial attention allocation and attentional maintenance were indexed by probability of first fixation and gaze duration, respectively. Maternal pain-attending behaviors toward the child were videotaped and coded after CPT completion. Mothers also rated the intensity of pain and anger cues used in the free-viewing tasks. All analyses controlled for maternal catastrophizing about child pain. Results Neither child-oriented nor self-oriented injustice was associated with maternal attentional bias toward child pain. Regarding attention toward self-relevant anger cues, differential associations were observed for self- and child-oriented injustice appraisals, with maternal self-oriented injustice being associated with a greater probability of first fixating on anger and with higher anger ratings, whereas maternal child-oriented injustice was associated with enhanced attentional maintenance toward anger. Neither type of maternal injustice appraisals was associated with maternal pain-attending behavior, which was only associated with maternal catastrophizing. Conclusions The current study sheds light on potential differential mechanisms through which maternal self- vs. child-oriented injustice appraisals may exert their impact on parent and child pain-related outcomes. Theoretical implications and future directions are discussed. [less ▲]

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See detailLe droit à la sauce piquante n°25 - Décembre 2021
Hiez, David UL; Laurent, Rémi

in Le droit à la sauce piquante (2021), 25

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See detailBrownian Loops, Layering Fields and Imaginary Gaussian Multiplicative Chaos
Camia, Federico; Gandolfi, Alberto; Peccati, Giovanni UL et al

in Communications in Mathematical Physics (2021), In press

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See detailLehrkräfte als maßgebliche Akteur*innen beim Einsatz von Informations- und Kommunikationstechnologie (IKT) in Lern- und Lehrprozessen – Zentrale Ergebnisse der ICILS 2018
Lomos, Catalina; Luyten, Hans J.W.; Boualam, Rachid UL et al

in LUCET; SCRIPT (Eds.) Nationaler Bildungsbericht Luxemburg 2021 (2021)

Detailed reference viewed: 32 (1 UL)