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See detailLocal Social Interaction and Urban Equilibria
Picard, Pierre M UL; Augeraud-Veron, Emmanuelle; Maruhenda, Fransico

in Mathematical Social Sciences (2021), 112

In this paper we investigate the effect of local interaction in a simple urban economics model. Agents interact with others if and only if their interaction benefit outweighs their travel cost and ... [more ▼]

In this paper we investigate the effect of local interaction in a simple urban economics model. Agents interact with others if and only if their interaction benefit outweighs their travel cost and therefore meet others only within finite geographic windows. We show that two or more cites may co-exist at the equilibrium provided that they are sufficiently distant. For any interaction surplus function, there exists a unique spatial equilibrium on not too large city supports. The population density within a city is determined by a second order advance-delay differential equation, whose solutions are fully characterized for linear interaction surplus functions. Numerical analyses show that more localized interactions yield flatter population density and land rents over larger extents of the city support. They do not give support to the idea that multiple subcenters can be caused by small and finite geographic windows of interaction. [less ▲]

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See detailThe effect of a pain educational video intervention upon child pain-related outcomes: A randomized controlled study
Rheel, Emma; Ickmans, Kelly; Wauters, Aline et al

in European Journal of Pain (2021), 25(10), 2094-2111

Background: Pain neuroscience education (PNE) has received increasing research attention demonstrating beneficial effects on pain-related outcomes in adults. Conversely, studies on the effectiveness of ... [more ▼]

Background: Pain neuroscience education (PNE) has received increasing research attention demonstrating beneficial effects on pain-related outcomes in adults. Conversely, studies on the effectiveness of PNE in children are scarce. Methods: This study investigated the effect of a pain educational video intervention on child pain-related outcomes (i.e. experienced pain intensity, pain-related fear and catastrophic worry about pain, pain threshold and pain knowledge) in healthy children undergoing an experimental pain task. Furthermore, the moderating role of children's demographic (i.e. sex and age) and psychological (i.e. baseline pain knowledge and anticipated pain intensity, pain-related fear and catastrophic worry) characteristics was examined. Participants were 89 children (Mage = 11.85, SD = 1.78), randomly assigned to either a condition whereby they were instructed to watch a brief pain educational video (i.e. experimental group) or to a control condition whereby they did not watch any video. Results: Study findings revealed that accurate pain knowledge and pain threshold were higher amongst children in the experimental group compared to the control group. In contrast with expectations, no main effects of the video intervention were observed for experienced pain intensity, pain-related fear and catastrophic worry. Moderation analyses indicated that the video intervention contributed, in comparison with the control condition, to higher levels of pain knowledge amongst younger children only and to higher pain thresholds amongst boys only. Conclusions: Further investigation is needed to optimize pain educational video interventions and to determine whether more beneficial outcomes can be found in clinical (i.e. non-experimental) situations and in children with persistent or recurring pain problems. Significance: Examining the impact of pain educational interventions within a non-clinical setting is deemed particularly important given that adaptive pain coping strategies likely play an important role in preventing the development and maintenance of future maladaptive pain-related behaviour. Further, study findings provide preliminary evidence of baseline and demographic (i.e. age and sex) characteristics explaining differences in the effect of a pain educational video intervention in pain knowledge and pain-related experiences during experimental pain. [less ▲]

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See detailDas luxemburgische Schulsystem und seine Schulen
Backes, Susanne UL; Lenz, Thomas UL

in LUCET, SCRIPT (Ed.) Nationaler Bildungsbericht Luxemburg 2021 (2021)

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See detailKulturen des Reparierens und die Lebensdauer der Dinge (Teil 1)
Krebs, Stefan UL; Schabacher, Gabriele; Weber, Heike

in TU: Zeitschrift für Technik im Unterricht (2021), 46(2), 5-13

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See detailAssessment and Measurement in Health Psychology
van Ryckeghem, Dimitri UL; Crombez, Geert

in Reference Module in Neuroscience and Biobehavioral Psychology (2021)

Sound assessment and measurement is at the heart of every discipline, including health psychology. Within the current chapter, we address several key issues of assessment and measurement in health ... [more ▼]

Sound assessment and measurement is at the heart of every discipline, including health psychology. Within the current chapter, we address several key issues of assessment and measurement in health psychology. We discuss the strengths and weaknesses of commonly used methodologies in health psychology research and clinic, including questionnaire assessment and ecological momentary assessment, as well as potential pitfalls in using these assessment methods. Next, we discuss three pivotal features of assessment (i.e. reliability, validity, and responsiveness) and their importance for assessment of health psychological constructs. Last, we discuss some examples of tools to assess health outcomes in research and evidence-based practice as well as future directions in the field of health psychology assessment. [less ▲]

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See detailCasual Leisure in Rich-Prospect: Advancing Visual Information Behavior for Digital Museum Collections
Morse, Christopher UL; Niess, Jasmin; Lallemand, Carine UL et al

in Journal on Computing and Cultural Heritage (2021), 14(3),

As digital cultural collections become increasingly sophisticated in their scope and functionality, there is a need to build an in-depth understanding concerning the information behaviors of users in this ... [more ▼]

As digital cultural collections become increasingly sophisticated in their scope and functionality, there is a need to build an in-depth understanding concerning the information behaviors of users in this new domain. Research has demonstrated that many digital museum visitors are engaged in casual leisure during exploration of a collection, suggesting that they do not have an inherent information goal but rather seek new experiences or learning opportunities based on personal curiosity and moments of discovery. Consequently, understanding how to translate casual leisure contexts into meaningful interaction design may play a critical role in designing engaging digital collections. Our study reports on the user experience of a largely unexplored user interface design framework called rich-prospect, which was originally developed to enhance browsing and discovery for complex visual collections. We performed a mixed-method, within-subjects study (N=30) that simulated a casual leisure approach to information browsing and retrieval across three different rich-prospect interfaces for digital cultural heritage. Our results show that rich-prospect scores well in the hedonic facets of its user experience, whereas pragmatic aspects have room for improvement. Additionally, through our qualitative analysis of participant feedback, we derived salient themes relating to the exploratory browsing experience. We conclude with a series of design implications to better connect interactive elements with casual leisure contexts for digital cultural collections. © 2021 Owner/Author. [less ▲]

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See detailSchülerinnen und Schüler im luxemburgischen Schulsystem
Backes, Susanne UL; Lenz, Thomas UL

in LUCET, SCRIPT (Ed.) Nationaler Bildungsbericht Luxemburg 2021 (2021)

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See detailMeasurement Invariance of Test Anxiety Across Four School Subjects
Schneider, Rebecca; Sparfeldt, Jörn R; Niepel, Christoph UL et al

in European Journal of Psychological Assessment (2021)

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See detailLes élèves dans le système scolaire luxembourgeois
Backes, Susanne UL; Lenz, Thomas UL

in LUCET, SCRIPT (Ed.) Rapport national sur l’éducation au Luxembourg 2021 (2021)

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See detailAuction-based Multiple Channel Cooperative Spectrum Sharing in Hybrid Satellite-Terrestrial IoT Networks
Zhang, Xiaokai; Guo, Daoxing; An, Kang et al

in IEEE Internet of Things Journal (2021), 8(8), 7009-7023

In this paper, we investigate the multiple-channel cooperative spectrum sharing in hybrid satellite-terrestrial internet of things (IoT) networks with auction mechanism, which is designed to reduce the ... [more ▼]

In this paper, we investigate the multiple-channel cooperative spectrum sharing in hybrid satellite-terrestrial internet of things (IoT) networks with auction mechanism, which is designed to reduce the operational expenditure of the satellitebased IoT (S-IoT) network while alleviating the spectrum scarcity issues of terrestrial-based IoT (T-IoT) network. The cluster heads of selected T-IoT networks assist the primary satellite users transmission through cooperative relaying techniques in exchange for spectrum access. We propose an auction-based optimization problem to maximize the sum transmission rate of all primary S-IoT receivers with the appropriate secondary network selection and corresponding radio resource allocation profile by the distributed implementation, while meeting the minimum transmission rate of secondary receivers of each T-IoT network. Specifically, the one-shot VCG auction is introduced to obtain the maximum social welfare, where the winner determination problem is transformed into an assignment problem and solved by the Hungarian algorithm. To further reduce the primary satellite network decision complexity, the sequential Vickrey auction is implemented by sequential fashion until all channels are auctioned. Due to incentive compatibility with those two auction mechanisms, the secondary T-IoT cluster yields the true bids of each channel, where both the non-orthogonal multiple access (NOMA) and time division multiple access (TDMA) schemes are implemented in cooperative communication. Finally, simulation results validate the effectiveness and fairness of the proposed auction-based approach as well as the superiority of the NOMA scheme in secondary relays selection. Moreover, the influence of key factors on the performance of the proposed scheme is analyzed in detail. [less ▲]

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See detailCoverage Probability of Double-IRS Assisted Communication Systems
Papazafeiropoulos, Anastasios; Kourtessis, Pandelis; Chatzinotas, Symeon UL et al

in IEEE Wireless Communications Letters (2021), 10(8), 1722-1726

In this paper, we derive the coverage probability of a double-intelligent reflecting surface (IRS) assisted wireless network and study the impact of multiplicative beamforming gain and correlated Rayleigh ... [more ▼]

In this paper, we derive the coverage probability of a double-intelligent reflecting surface (IRS) assisted wireless network and study the impact of multiplicative beamforming gain and correlated Rayleigh fading. In particular, we derive a novel closed-form expression of the coverage probability of a single-input single-output (SISO) system assisted by two large IRSs while being dependent on the corresponding arbitrary reflecting beamforming matrices (RBMs) and large-scale statistics in terms of correlation matrices. Taking advantage of th large-scale statistics, we achieve to perform optimization of the RBM of both IRSs at every several coherence intervals rather at each interval. This property, based on statistical channel state information (CSI), is of paramount importance in multi-IRS assisted networks, which are accompanied with increased computational complexity during their RBM optimization. Numerical results validate the tightness of the analytical results even for small IRSs and reveal insightful properties. [less ▲]

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See detailLe système scolaire luxembourgeois et ses école
Backes, Susanne UL; Lenz, Thomas UL

in LUCET, SCRIPT (Ed.) Rapport national sur l’éducation au Luxembourg 2021 (2021)

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See detailMulti-layer Space Information Networks: Access Design and Softwarization
Al-Hraishawi, Hayder UL; Minardi, Mario UL; Chougrani, Houcine UL et al

in IEEE Access (2021)

In this paper, we propose an approach for constructing a multi-layer multi-orbit space information network (SIN) to provide high-speed continuous broadband connectivity for space missions (nanosatellite ... [more ▼]

In this paper, we propose an approach for constructing a multi-layer multi-orbit space information network (SIN) to provide high-speed continuous broadband connectivity for space missions (nanosatellite terminals) from the emerging space-based Internet providers. This notion has been motivated by the rapid developments in satellite technologies in terms of satellite miniaturization and reusable rocket launch, as well as the increased number of nanosatellite constellations in lower orbits for space downstream applications, such as earth observation, remote sensing, and Internet of Things (IoT) data collection. Specifically, space-based Internet providers, such as Starlink, OneWeb, and SES O3b, can be utilized for broadband connectivity directly to/from the nanosatellites, which allows a larger degree of connectivity in space network topologies. Besides, this kind of establishment is more economically efficient and eliminates the need for an excessive number of ground stations while achieving real-time and reliable space communications. This objective necessitates developing suitable radio access schemes and efficient scalable space backhauling using inter-satellite links (ISLs) and inter-orbit links (IOLs). Particularly, service-oriented radio access methods in addition to software-defined networking (SDN)-based architecture employing optimal routing mechanisms over multiple ISLs and IOLs are the most essential enablers for this novel concept. Thus, developing this symbiotic interaction between versatile satellite nodes across different orbits will lead to a breakthrough in the way that future downstream space missions and satellite networks are designed and operated. [less ▲]

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See detailMedical Histories of Belgium New Narratives on Health, Care and Citizenship in the Nineteenth and Twentieth Centuries
Majerus, Benoît UL; Vanden Driessche, Joris

Book published by Manchester University Press (2021)

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See detailIntroduction
Majerus, Benoît UL; Vandendriesche, Joris

in Majerus, Benoît; Vandendriesche, Joris (Eds.) Medical Histories of Belgium New Narratives on Health, Care and Citizenship in the Nineteenth and Twentieth Centuries (2021)

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See detailSonderpädagogische Fördersysteme und inklusive Bildung
Powell, Justin J W UL; Pfahl, Lisa; Blanck, Jonna M.

in Bittlingmayer, Uwe; Bauer, Ullrich; Scherr, Albert (Eds.) Handbuch Bildungs- und Erziehungssoziologie (2021)

In diesem Beitrag wird aus der Perspektive der Bildungssoziologie ein kritischer Blick auf die sonderpädagogischen Förderschulsysteme, die Sonderpädagogik und die Folgen von Sonderbeschulung für ... [more ▼]

In diesem Beitrag wird aus der Perspektive der Bildungssoziologie ein kritischer Blick auf die sonderpädagogischen Förderschulsysteme, die Sonderpädagogik und die Folgen von Sonderbeschulung für Schülergruppen mit Behinderungen und Benachteiligungen entwickelt. Dazu werden Kennzeichen sonderpädagogischer Förderung zusammengefasst und in historischer Perspektive wichtige Entwicklungen sonderpädagogischer Fördersysteme nachgezeichnet. Hierzu werden Ergebnisse ländervergleichender Studien dargestellt sowie Erkenntnisse macht- und diskursanalytischer Forschung zur Sonderpädagogik präsentiert, die die Persistenz schulischer Segregation erklären. Abschließend wird eine lebensverlaufs- bzw. biografieanalytische Perspektive auf die Folgen schulischer Segregation eingenommen und ein Fazit gezogen. [less ▲]

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See detailBeyond boundaries: histories of dis/order and dis/ability
Majerus, Benoît UL; Verstraete, Pieter

in Majerus, Benoît; Vandendriesche, Joris (Eds.) Medical Histories of Belgium New Narratives on Health, Care and Citizenship in the Nineteenth and Twentieth Centuries (2021)

Detailed reference viewed: 48 (0 UL)
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See detailPrecoding-Aided Bandwidth Optimization for High Throughput Satellite Systems
Abdu, Tedros Salih UL; Lei, Lei UL; Kisseleff, Steven UL et al

Scientific Conference (2021)

Linear precoding boosts the spectral efficiency of the satellite system by mitigating the interference signal. Typically, all users are precoded and share the same bandwidth regardless of the user demand ... [more ▼]

Linear precoding boosts the spectral efficiency of the satellite system by mitigating the interference signal. Typically, all users are precoded and share the same bandwidth regardless of the user demand. This bandwidth utilization is not efficient since the user demand permanently varies. Hence, demand-aware bandwidth allocation with linear precoding is promising. In this paper, we exploited the synergy of linear precoding and flexible bandwidth allocation for geostationary (GEO) high throughput satellite systems. We formulate an optimization problem with the goal to satisfy the demand by taking into account that multiple precoded user groups can share the different bandwidth chunks. Hence, optimal beam groups are selected with minimum bandwidth requirement to match the per beam demand. The simulation results show that the proposed method of combining bandwidth allocation and linear precoding has better bandwidth efficiency and demand satisfaction than benchmark schemes. [less ▲]

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See detailMagneto-optical activity in nonmagnetic hyperbolic nanoparticles
Kuttruff, Joel; Gabbani, Alessio; Petrucci, Gaia et al

in Physical Review Letters (2021), 127

Active nanophotonics can be realized by controlling the optical properties of materials with external magnetic fields. Here, we explore the influence of optical anisotropy on the magneto-optical activity ... [more ▼]

Active nanophotonics can be realized by controlling the optical properties of materials with external magnetic fields. Here, we explore the influence of optical anisotropy on the magneto-optical activity in non-magnetic hyperbolic nanoparticles. We demonstrate that the magneto-optical response is driven by fundamental electric and magnetic dipole modes induced by the hyperbolic dispersion. Magnetic circular dichroism experiments confirm the theoretical predictions and reveal tunable magneto-optical activity across the visible and near infrared spectral range. [less ▲]

Detailed reference viewed: 125 (12 UL)