References of "2020"
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See detailParabolic semi-orthogonal decompositions and Kummer flat invariants of log schemes
Scherotzke, Sarah UL; Sibilla, Nicolo; Talpo, Mattia

in Documenta Mathematica (2020)

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See detailGluing semi-orthogonal decompositions
Scherotzke, Sarah UL; Sibilla, Nicolo; Talpo, Mattia

in Journal of Algebra (2020)

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See detail“What's a normal weight?” – Origin and receiving country influences on weight-status assessment among 1.5 and 2nd generation immigrant adolescents in Europe
Kern, Matthias Robert UL; Heinz, Andreas UL; Stevens, Gonneke W.J.M. et al

in Social Science and Medicine (2020)

Many adolescents struggle with adequately assessing their weight-status, often leading to unnecessary weight-related interventions or preventing necessary ones. The prevalence of weight-status over- and ... [more ▼]

Many adolescents struggle with adequately assessing their weight-status, often leading to unnecessary weight-related interventions or preventing necessary ones. The prevalence of weight-status over- and underestimation differs considerably cross-nationally, suggesting that individual weight-status assessment is informed by cross-nationally differing standards of evaluation. For adolescents with a migration background, this brings up the possibility of a simultaneous influence of origin- and receiving country standards. The current study examines the magnitude of both influences using data from the 2014 Health Behaviour in School-Aged Children study. The cross-national design of the study enabled us to aggregate weight-evaluation standards for 41, primarily European, countries. Subsequently, we identified a sample of 8 124 adolescents with a migration background whose origin as well as receiving country participated in the study. Among those adolescents, we assessed the effects of origin and receiving country weight-evaluation standards using cross-classified multilevel regression analyses. Descriptive analyses revealed considerable differences in weight-evaluation standards between the countries. Regression analyses showed that both origin- and receiving country weight-evaluation standards were significantly associated cross-sectionally with weight-status assessment among the immigrant adolescents, with a stronger impact of receiving country standards. Results illustrate the context-sensitivity of adolescent weight-status assessment and reinforce the theoretical notion that immigrant adolescent development is not only informed by factors pertaining to their receiving country but also, albeit to a lesser extent, by those pertaining to their origin country. [less ▲]

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See detailIn situ magnetorheological SANS setup at Institut Laue-Langevin
Zákutná, Dominika; Graef, Kevin; Dresen, Dominique et al

in Colloid and Polymer Science (2020)

A magnetorheological sample environment is presented that allows for in situ magnetic field and shear flow during small-angle neutron scattering (SANS) measurements and is now available at the Institut ... [more ▼]

A magnetorheological sample environment is presented that allows for in situ magnetic field and shear flow during small-angle neutron scattering (SANS) measurements and is now available at the Institut Laue-Langevin (ILL). The setup allows performing simultaneous magnetorheological measurements together with the investigation of structural and magnetic changes on the nanometer length scale underlying the rheological response of ferrofluids. We describe the setup consisting of a commercial rheometer and a custom-made set of Helmholtz coils and show exemplarily data on the field and shear flow alignment of a dispersion of hematite nanospindles in water. [less ▲]

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See detailCarrier and Power Assignment for Flexible Broadband GEO Satellite Communications System
Abdu, Tedros Salih UL; Lagunas, Eva UL; Kisseleff, Steven et al

in PIMRC 2020 Proceedings (2020)

Current multi-beam GEO satellite systems operate under a limited frequency reuse configuration and considering uniform power assignment across beams. The latter has been shown to be inefficient in ... [more ▼]

Current multi-beam GEO satellite systems operate under a limited frequency reuse configuration and considering uniform power assignment across beams. The latter has been shown to be inefficient in matching the geographic distribution of the traffic demand. In this context, next generation of broadband GEO satellite systems will be equipped with more flexible and reconfigurable payloads, facilitating on-demand resource allocation. In this paper, we consider both carrier and power assignment to match the requested beam demands while minimizing the total transmit power and the total utilized bandwidth. A novel optimization problem is formulated and, given its non-convex structure, we divide the problem into two tractable sub-problems. First, we estimate the number of adjacent frequency carriers required for each beam to satisfy its demand and, subsequently, we optimize the power allocation based on the previously assigned carriers. We validate the proposed method with extensive numerical results, which demonstrate its efficiency with respect to benchmark strategies. [less ▲]

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See detailStochastic and Quantum Thermodynamics of Driven RLC Networks
Freitas, Nahuel; Delvenne, Jean-Charles; Esposito, Massimiliano UL

in Phys. Rev. X (2020), 10(3), 031005

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See detailLarge Intelligent Surface for Positioning in Millimeter Wave MIMO Systems
He, Jiguang; Wymeersch, Henk; Kong, Long UL et al

in 2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring) (2020)

Millimeter-wave (mmWave) multiple-input multiple-output (MIMO) system for the fifth generation (5G) cellular communications can also enable single-anchor positioning and object tracking due to its large ... [more ▼]

Millimeter-wave (mmWave) multiple-input multiple-output (MIMO) system for the fifth generation (5G) cellular communications can also enable single-anchor positioning and object tracking due to its large bandwidth and inherently high angular resolution. In this paper, we introduce the newly invented concept, large intelligent surface (LIS), to mmWave positioning systems, study the theoretical performance bounds (i.e., Cramér-Rao lower bounds) for positioning, and evaluate the impact of the number of LIS elements and the value of phase shifters on the position estimation accuracy compared to the conventional scheme with one direct link and one non-line-of-sight path. It is verified that better performance can be achieved with a LIS from the theoretical analyses and numerical study. [less ▲]

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See detailPositionPeak: Stimulating position changes during meetings
Damen, Ida; Heerkens, Lidewij; Van Den Broek, Annabel et al

in Proceedings of Conference on Human Factors in Computing Systems (2020)

In office environments, workers spend the majority of their workday sitting in a static position behind a desk or around a meeting table. Prolonged sitting time and sedentary behavior have severe negative ... [more ▼]

In office environments, workers spend the majority of their workday sitting in a static position behind a desk or around a meeting table. Prolonged sitting time and sedentary behavior have severe negative health effects. Through this explorative study, we studied how different postures can be stimulated during meetings. We designed PositionPeak: three pieces of furniture aimed at composing a 'dynamic meeting room', subtly encouraging participants to avoid static postures. We video-recorded 5 meetings (N=16) and coded the number of position changes per participant. Participants also filled out a pre- and post-questionnaire about their experience. Our findings show that PositionPeak triggers people to adopt a variety of postures. Participants on average experienced a more efficient meeting but reported physical discomfort with some objects. We discuss the influence of PositionPeak on the meetings' social dynamics, the acceptance of new conventions and design recommendations for new meeting facilities. © 2020 Owner/Author. [less ▲]

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See detailKant and Neo-Kantianism
Heidemann, Dietmar UL

in Kant Yearbook (2020)

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See detailSidelobe Performance Analysis of Noise Waveforms Considering the Doppler Mismatch
Tedgue Beltrao, Gabriel UL; Pralon, Leandro; Alaeekerahroodi, Mohammad UL et al

in Proceedings of the 21st International Radar Symposium (IRS), Warsaw, Poland, 2020 (2020)

Waveform design and optimization algorithms generally assume a zero-Doppler ideal case to reach an optimum or satisfactory solution in terms of the matched filter output. Therefore, its performance is ... [more ▼]

Waveform design and optimization algorithms generally assume a zero-Doppler ideal case to reach an optimum or satisfactory solution in terms of the matched filter output. Therefore, its performance is usually characterized only in terms of the resultant waveforms autocorrelation function, neglecting the practical situation in which the received signal is modulated by the target’s Doppler shift. Within this context, this work investigates the Doppler mismatch effects in the Integrated Sidelobe Level (ISL) performance of previously designed/optimized noise waveforms. The analysis has shown that, despite much better results for steady targets, the increasing Doppler mismatch reduces the ISL performance of optimized waveforms, until similar levels achieved when no optimization is performed. To address that, a subpulse Doppler processing approach is also considered, and the results have shown that, besides increasing the Doppler tolerance, it has also increased the optimized waveform robustness to the Doppler mismatch, reducing the resultant ISL loss and thus extending its applicability. [less ▲]

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See detailInterrogating helical nanorod self-assembly with fractionated cellulose nanocrystal suspensions
Honorato-Rios, Camila; Lagerwall, Jan UL

in Communications Materials (2020), 1

The helical self-assembly of cholesteric liquid crystals is a powerful motif in nature, enabling exceptional performance in many biological composites. Attempts to mimic these remarkable materials by ... [more ▼]

The helical self-assembly of cholesteric liquid crystals is a powerful motif in nature, enabling exceptional performance in many biological composites. Attempts to mimic these remarkable materials by drying cholesteric colloidal nanorod suspensions often yield films with a non-uniform mosaic-like character, severely degrading optical and mechanical properties. Here we show---using the example of cellulose nanocrystals---that these problems are due to rod length dispersity: uncontrolled phase separation results from a ... [less ▲]

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See detailBordertextures – vers une approche transdisciplinaire des frontières. Un rapport d’atelier
Weier, Sebastian; Fellner, Astrid; Frenk, Joachim et al

in Hamez, Grégory; Defays, Jean-Marc (Eds.) Réalités, perceptions et représentations des frontières. L’espace transfrontalier de la Grande Région Sarre-Lor-Lux (2020)

La présente contribution est conçue sous forme d'un rapport d'atelier et donne un premier aperçu concernant le développement d'une approche des phénomènes de frontières et d'espaces frontaliers sur la ... [more ▼]

La présente contribution est conçue sous forme d'un rapport d'atelier et donne un premier aperçu concernant le développement d'une approche des phénomènes de frontières et d'espaces frontaliers sur la base des études culturelles. Cette approche tente d'être plus large que celle correspondant aux perspectives jusqu'à présent préconisées par les sciences sociales et appréhende les phénomènes des frontières et des espaces frontaliers en tant qu'entités composées de différentes pratiques et différents discours faisant référence aux frontières et aux différences. Ces entités comprises au sens de bordertextures sont exemplairement illustrées à travers des phénomènes concernant la frontière entre les États-Unis et le Mexique, la frontière franco-allemande et l'Irlande du Nord et elles sont déclinées en différentes dimensions d'analyse. Parmi ces dernières, la corporéalité, la spatialité et la matérialité figurent parmi les approches heuristiques des bordertextures que la présente contribution aborde à titre d'exemples. L'approche relativise la perspective largement répandue correspondant à une conception territoriale de la frontière pour élargir la palette des perspectives analytiques et celles des domaines analysés au sein des Border Studies. [less ▲]

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See detailDistinctive body perception mechanisms in high versus low symptom reporters: a neurophysiological model for medically-unexplained symptoms
Schulz, André UL; Rost, Silke; Flasinski, Tabea et al

in Journal of Psychosomatic Research (2020), 137(1), 110223

OBJECTIVE: The neurophysiological processes involved in the generation of medicallyunexplained symptoms (MUS) remain unclear. This study tested three assumptions of the perception-filter model ... [more ▼]

OBJECTIVE: The neurophysiological processes involved in the generation of medicallyunexplained symptoms (MUS) remain unclear. This study tested three assumptions of the perception-filter model contributing to MUS: (I.) increased bodily signal strength (II.) decreased filter function, (III.) increased perception. METHODS: In this cross-sectional, observational study, trait MUS was assessed by a webbased survey (N=486). The upper and lower decile were identified as extreme groups of high (HSR; n=29; 26 women; Mage=26.0 years) and low symptom reporters (LSR; n=29; 21 women; Mage=28.4 years). Mean heart rate (HR) and heart rate variability (HRV), and cortisol awakening response (CAR) were assessed as indicators of bodily signal strength (I.). Heartbeat-evoked potentials (HEPs) were assessed during rest and a heartbeat perception task. HEPs reflect attentional resources allocated towards heartbeats and served as index of filter function (II.). Interoceptive accuracy (IAc) in heartbeat perception was assessed as an indicator of perception (III.). RESULTS: HSR showed higher HR and lower HRV (RMSSD) than LSR (I.), but no differences in CAR. HSR exhibited a stronger increase of HEPs when attention was focused on heartbeats than LSR (II.); there were no group differences in IAc (III.). CONCLUSIONS: The perception-filter model was partially confirmed in that HSR showed altered bodily signals suggesting higher sympathetic activity (I.); higher HEP increases indicated increased filter function for bodily signals (II.). As more attentional resources are mobilized to process heartbeats, but perception accuracy remains unchanged (III.), this overflow could be responsible for detecting minor bodily changes associated with MUS. [less ▲]

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See detailDie Siegfried-Figur der Nibelungenüberlieferung in interkultureller Perspektive
Sieburg, Heinz UL

in Cornejo, Renata; Schiewer, Gesine Lenore; Weinberg, Manfred (Eds.) Konzepte der Interkulturalität in der Germanistik weltweit (2020)

Siegfried, the hero of the Middle High German »Nibelungenlied«, is not only interesting as a figure from the perspective of a German-national myth formation. This article aims to show that Siegfried is ... [more ▼]

Siegfried, the hero of the Middle High German »Nibelungenlied«, is not only interesting as a figure from the perspective of a German-national myth formation. This article aims to show that Siegfried is also important from the perspective of ›intercultural medieval studies‹. Therefore, the Siegfried figure in the Nibelungenlied is determined by cultural hybridity. His Scandinavian counterpart, Sigurd, is no less revealing as a cultural mediator. [less ▲]

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See detailMinimalist life orientations as a dialogical tool for happiness
Hausen, Jennifer UL

in The pursuit of happiness: Between prosperity and adversity (2020)

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See detailTopological network measures for drug repositioning.
Badkas, Apurva UL; De Landtsheer, Sébastien; Sauter, Thomas UL

in Briefings in bioinformatics (2020)

Drug repositioning has received increased attention since the past decade as several blockbuster drugs have come out of repositioning. Computational approaches are significantly contributing to these ... [more ▼]

Drug repositioning has received increased attention since the past decade as several blockbuster drugs have come out of repositioning. Computational approaches are significantly contributing to these efforts, of which, network-based methods play a key role. Various structural (topological) network measures have thereby contributed to uncovering unintuitive functional relationships and repositioning candidates in drug-disease and other networks. This review gives a broad overview of the topic, and offers perspectives on the application of topological measures for network analysis. It also discusses unexplored measures, and draws attention to a wider scope of application efforts, especially in drug repositioning. [less ▲]

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See detailFrontières et identités spatiales dans / de la Grande Région SaarLorLux. Approches analytiques et résultats empiriques
Wille, Christian UL

in Hamez, Grégory; Defays, Jean-Marc (Eds.) Réalités, perceptions et représentations des frontières. L’espace transfrontalier de la Grande Région Sarre-Lor-Lux (2020)

Cette contribution a pour objet d'analyser l'importance des frontières nationales pour les identités spatiales dans des régions transfrontalières. À cet effet, elle élaborera un modèle d'analyse ... [more ▼]

Cette contribution a pour objet d'analyser l'importance des frontières nationales pour les identités spatiales dans des régions transfrontalières. À cet effet, elle élaborera un modèle d'analyse pluridimensionnel permettant d'étudier les identités et, à l'exemple de la Grande Région SaarLorLux, posera la question de savoir comment les habitants se représentent l'espace et organisent leurs pratiques de vie quotidienne sur le plan spatial. Par ailleurs, l'analyse révèlera des projections spatiales dans le discours politique et montrera dans quelle mesure celles-ci constituent une base de processus identitaires. La contribution démontre que, malgré des imbrications transfrontalières, les frontières nationales jouent un rôle important dans les processus de projection et d'appropriation identitaires des habitants de la Grande Région SaarLorLux, mais pas nécessairement en tant que catégories rigides. [less ▲]

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See detail„Dann eben in die Natur damit“ – Der neue Trend der Waldbestattung in Luxemburg: Geschichte, Beweggründe und ökologische Auswirkungen
Kmec, Sonja UL; Kolnberger, Thomas UL

in Thiltges, Sébastian; Solte-Gresser, Christiane (Eds.) Kulturökologie und ökologische Kulturen in der Großregion / Écologie culturelle et cultures écologiques dans la Grande Région (2020)

For the environment, humans and their way of life have become one of the most decisive factors of influence: their impact defines the geochronological era of the Anthropocene. These manmade changes ... [more ▼]

For the environment, humans and their way of life have become one of the most decisive factors of influence: their impact defines the geochronological era of the Anthropocene. These manmade changes include one specific type of sediments, namely that of human remains. In industrialized regions, the biologically degradable, organic matter of the human body is often altered by medical implants and pharmaceutical residues. Sepulchral practices may add other toxic substances. This article examines how the recent trend towards woodland burials of cremated remains in Luxembourg is embedded in ecological discourse and imagination, and asks whether it does provide an environment-friendly alternative to traditional full-body inhumations. [less ▲]

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See detailMicro-reversibility and thermalization with collisional baths
Ehrich, Jannik; Esposito, Massimiliano UL; Barra, Felipe et al

in Physica A. Statistical Mechanics and its Applications (2020)

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See detailComparative transcriptome analysis of Parkinson’s disease and Hutchinson-Gilford progeria syndrome reveals shared susceptible cellular network processes
Hendrickx, Diana M.; Glaab, Enrico UL

in BMC Medical Genomics (2020), 13(114),

Background Parkinson’s Disease (PD) and Hutchinson-Gilford Progeria Syndrome (HGPS) are two heterogeneous disorders, which both display molecular and clinical alterations associated with the aging process ... [more ▼]

Background Parkinson’s Disease (PD) and Hutchinson-Gilford Progeria Syndrome (HGPS) are two heterogeneous disorders, which both display molecular and clinical alterations associated with the aging process. However, similarities and differences between molecular changes in these two disorders have not yet been investigated systematically at the level of individual biomolecules and shared molecular network alterations. Methods Here, we perform a comparative meta-analysis and network analysis of human transcriptomics data from case-control studies for both diseases to investigate common susceptibility genes and sub-networks in PD and HGPS. Alzheimer’s disease (AD) and primary melanoma (PM) were included as controls to confirm that the identified overlapping susceptibility genes for PD and HGPS are non-generic. Results We find statistically significant, overlapping genes and cellular processes with significant alterations in both diseases. Interestingly, the majority of these shared affected genes display changes with opposite directionality, indicating that shared susceptible cellular processes undergo different mechanistic changes in PD and HGPS. A complementary regulatory network analysis also reveals that the altered genes in PD and HGPS both contain targets controlled by the upstream regulator CDC5L. Conclusions Overall, our analyses reveal a significant overlap of affected cellular processes and molecular sub-networks in PD and HGPS, including changes in aging-related processes that may reflect key susceptibility factors associated with age-related risk for PD. [less ▲]

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