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See detailComparison of high-performance and conventional internal insulation materials based on hygrothermal analysis using in situ measurements and simulation
Latz, Sebastian UL; Maas, Stefan UL; Scholzen, Frank UL et al

in Bauphysik (2022), 1

Following the European directive to reduce CO2 emissions of existing buildings by improving energy efficiency, internal insulation systems play a central role in the renovation of historically valuable ... [more ▼]

Following the European directive to reduce CO2 emissions of existing buildings by improving energy efficiency, internal insulation systems play a central role in the renovation of historically valuable buildings which cannot be insulated from the outside for reasons of monumental protection, or in cases where no additional exterior space is available. However, besides the thermal property of insulation systems, there are other relevant properties to be considered before choosing an internal insulation system, such as the hygrothermal behavior which plays a particularly important role in diffusion-open interior insulation systems. As the internal insulation layer reduces the temperature of the existing wall during the heating season, its drying potential after rain events is considerably reduced. In addition to the effects of moisture from the outside (mainly wind driven rain), the entry of humidity from the inside through diffusion plays an important role. In the presented study, high performance insulation materials with nanostructure based on silicon dioxide and polyurethane are compared to conventional material based on wood fiber from a hygrothermal point of view by analyzing in situ measurements and simulations. [less ▲]

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See detailRevealing defect-induced spin disorder in nanocrystalline
Bersweiler, Mathias UL

Scientific Conference (2022, January)

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See detailThe Green Stock Market Bubble
Lehnert, Thorsten UL

Scientific Conference (2022, January)

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See detailFostering experimental and computational synergy to modulate hyperinflammation
Del Sol Mesa, Antonio UL

in Trends in Immunology (2022), 43(1),

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See detailThe Myth of Beirut’s Resilience: Introduction to the Thematic Issue
Buccianti-Barakat, Liliane; Hesse, Markus UL

in Urban Planning (2022), 7(1), 82-86

This editorial introduces a thematic issue of Urban Planning on recent developments in Beirut, Lebanon. It emphasises the multiple crises the city has been undergoing for some time, which include an ... [more ▼]

This editorial introduces a thematic issue of Urban Planning on recent developments in Beirut, Lebanon. It emphasises the multiple crises the city has been undergoing for some time, which include an enduring political and economic crisis, the impact of the Covid‐19 pandemic, and most recently the devastating impact of the blast that happened in the port of Beirut on 4th August 2020. The editorial outlines the specific challenges resulting from these crises and addresses the concept of resilience, which is taken up by the articles included in this issue. [less ▲]

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See detailIst individuelle Diagnostik im Schulmonitoring möglich? Neue Methoden versprechen einen diagnostischen Mehrwert der Épreuves Standardisées
Sonnleitner, Philipp UL

in Georges, Carrie; Hoffmann, Danielle; Hornung, Caroline (Eds.) et al LEARN Newsletter - Editioun 2022 (2022)

Das durch den Fonds National de la Recherche (FNR) geförderte Forschungsprojekt FAIR-ITEMS (C19/SC/13650128) am Luxembourg Centre for Educational Testing (LUCET, lucet.uni.lu) Untersucht aktuell ... [more ▼]

Das durch den Fonds National de la Recherche (FNR) geförderte Forschungsprojekt FAIR-ITEMS (C19/SC/13650128) am Luxembourg Centre for Educational Testing (LUCET, lucet.uni.lu) Untersucht aktuell, inwieweit die ÉpStan im Bereich Mathematik zusätzliche diagnostische Informationen über die SchülerInnen liefern könnten. Da die Tests dabei mehr leisten sollen, wird zusätzliche Expertise bei der Erstellung, als auch bei der Auswertung mithilfe neuester psychometrischer Methoden angewandt. [less ▲]

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See detailIntroduction to Smart Cities in Transition: Challenges of Participation in Urban Environments
Papangelis, Konstantinos; Saker; Leork, Dale et al

in International Journal of Human-Computer Interaction (2022)

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See detailOpinion Statement ECJ-TF 2/2021 on the ECJ Decision of 25 February 2021 in Société Générale (Case C-403/19) on the Calculation of the Maximum Amount of a Foreign Direct Tax Credit
Kofler, Georg; Garcia Prats, Alfredo; Haslehner, Werner UL et al

in European Taxation (2022)

The Court’s decision in Société Générale reinforces established case law that EU law neither prohibits juridical double taxation nor does it impose an obligation on the residence Member State to prevent ... [more ▼]

The Court’s decision in Société Générale reinforces established case law that EU law neither prohibits juridical double taxation nor does it impose an obligation on the residence Member State to prevent the disadvantages that could arise from the exercise of competence thus attributed by the two Member States. The parallel existence of taxing jurisdiction, however, must be distinguished from the exercise of such jurisdiction by each Member State. While Member States are free to determine the connecting factors for the allocation of taxing jurisdiction in tax treaties, in exercising the “power of taxation, so allocated by bilateral conventions for the avoidance of double taxation, the Member States must comply with EU rules and, more particularly, observe the principle of equal treatment”. It is generally accepted in the Court’s case law that both the ordinary credit and exemption (including exemption with progression) methods are permissible to avoid double taxation. In Société Générale, this position was confirmed, specifically as regards the “maximum deduction” under the ordinary credit method in tax treaties, even though this treatment can result in a disadvantage for cross-border income as compared with domestic income. As the disadvantage in Société Générale was due to the difference between gross-basis taxation of dividends in the source Member States (Italy, the Netherlands and the United Kingdom) and net-basis taxation of those foreign-sourced dividends in the residence state (France), it remains to be seen whether or not future cases will bring clarity in light of the Seabrokers decision of the EFTA Court, which examined how expenses can be lawfully allocated to foreign income from the perspective of the residence Member State. [less ▲]

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See detailUncertainty-driven symmetry-breaking and stochastic stability in a generic differential game of lobbying
Boucekkine, Raouf; Fabien, Prieur; Ruan, Weihua et al

in Economic Theory (2022)

We study a 2-players stochastic differential game of lobbying. Players invest in lobbying activities to alter the legislation in her own benefit. The payoffs are quadratic and uncertainty is driven by a ... [more ▼]

We study a 2-players stochastic differential game of lobbying. Players invest in lobbying activities to alter the legislation in her own benefit. The payoffs are quadratic and uncertainty is driven by a Wiener process. We consider the Nash symmetric game where players face the same cost and extract symmetric payoffs, and we solve for Markov Perfect Equilibria (MPE) in the class of affine functions. First, we prove a general sufficient (catching up) optimality condition for two-players stochastic games with uncertainty driven by Wiener processes. Second, we prove that the number and nature of MPE depend on the extent of uncertainty (i.e the variance of the Wiener processes). In particular, we prove that while a symmetric MPE always exists, two asymmetric MPE emerge if and only if uncertainty is large enough. Third, we study the stochastic stability of all the equilibria. We notably find, that the state converges to a stationary invariant distribution under asymmetric MPE. Fourth, we study the implications for rent dissipation asymptotically and compare the outcomes of symmetric vs asymmetric MPE in this respect, ultimately enhancing again the role of uncertainty. [less ▲]

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See detailThe Irreversible Pollution Game
Boucekkine, Raouf; Ruan, Weihua; Zou, Benteng UL

E-print/Working paper (2022)

We study a 2-country differential game with irreversible pollution. Irresability is of a hard type: above a certain threshold level of pollution, the self-cleaning capacity of Nature drops to zero ... [more ▼]

We study a 2-country differential game with irreversible pollution. Irresability is of a hard type: above a certain threshold level of pollution, the self-cleaning capacity of Nature drops to zero. Accordingly, the game includes a non-concave feature, and we characterize both the cooperative and non-cooperative versions with this general non-LQ property. We deliver full analytical results for the existence of Markov Perfect Equilibria. We first demonstrate that when pollution costs are equal across players (symmetry), irreversible pollution regimes are more frequently reached than under cooperation. Second, we study the implications of asymmetry in the pollution cost. We find far nontrivial results on the reachability of the irreversible regime. However, we unambiguously prove that, for the same total cost of pollution, provided the irreversible regime is reached in both the symmetric and asymmetric cases, long-term pollution is larger in the symmetric case, reflecting more intensive free-riding under symmetry. [less ▲]

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See detailKI und Ethik in der Medizintechnik: ein selbstverständlicher Dreiklang? Warum Ethik für KMUs ein fester Bestandteil der Medizinproduktentwicklung werden muss.
van Schagen, Sijmen UL

Article for general public (2022)

Digitization and AI within the medtech industry offer promising opportunities to improve healthcare, but at the same time raise a lot of ethical questions. The relevance of addressing ethical questions ... [more ▼]

Digitization and AI within the medtech industry offer promising opportunities to improve healthcare, but at the same time raise a lot of ethical questions. The relevance of addressing ethical questions for the medtech industry, therefore, is increasing. This is particularly applicable when it comes to the use of artificial intelligence: How should one deal with AI-based health technology as a manufacturer, operator or patient, and as a society? [less ▲]

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See detailFrom communities to protein complexes: A local community detection algorithm on PPI networks
Dilmaghani, Saharnaz; Brust, Mathias UL; Ribeiro, Carlos H. et al

in PLoS ONE (2022), 17(1), 1-17

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See detailHow injury registration and preseason assessment are being delivered : an international survey of sports physical therapists
Ley, Christophe UL; Mendonça, Luciana D.; Schuermans, Joke et al

in Physical Therapy in Sport (2022), 53

Objective To identify the role of sports physical therapists (PT) in the organization of injury registration and preseason assessment, applied in athletic organizations and sports teams of different ... [more ▼]

Objective To identify the role of sports physical therapists (PT) in the organization of injury registration and preseason assessment, applied in athletic organizations and sports teams of different gender and level world-wide. Design cross-sectional study. Setting LimeSurvey platform. Participants Sports PTs working with athletes invited through International Federation of Sports Physical Therapy. Main outcome measures injury registration and athlete's screening. Results 414 sports PTs participated in this international survey (mean age of 37.66 (SD = 9.38) years). 340 participants indicated that the PT as the responsible for injury registration. Barriers to properly register injury throughout the season were indicated by 157 sports PT and 86 (54.77%) indicated a lack of time on their routine as the main factor. 93 participants (30.09%) indicated that they customize the prevention program based on the preseason assessment. Sports PTs who reported not performing a preseason assessment (92 participants - 22.22%) mainly indicated this to be consequence of lack of structure in the organization (44 participants – 47.82%). Conclusion The majority of the sports PTs participate on injury registration and perform preseason assessment in athletes. However, lack of time in their routine and structure in the organization were recognized as the most important barriers to organize these properly. [less ▲]

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See detailHow injury prevention programs are being structured and implemented worldwide: An international survey of sports physical therapists
Ley, Christophe UL; Mendonça, Luciana D.; Schuermans, Joke et al

in Physical Therapy in Sport (2022), 53

Objective To identify the role of sports physical therapists (PT) in the injury prevention process and to compare the structure of preventive programs and associated (organization) policies applied in ... [more ▼]

Objective To identify the role of sports physical therapists (PT) in the injury prevention process and to compare the structure of preventive programs and associated (organization) policies applied in athletic organizations and sports teams of varying gender and level world-wide. Design: cross-sectional study. Setting LimeSurvey platform. Participants Sports PT working with athletes invited through the International Federation of Sports Physical Therapy. Main outcome measures Sports injury prevention program (IPP) structure and implementation. Results 414 participants fully participate in this survey study. Athlete's injury history (68.84%), the most common injuries within the sport modality (67.87%) and athlete's preseason screening results (64.01%) were most frequently used to customize IPPs. Warm-up (70.04%) and individually PT-guided exercise-therapy (70.04%) were the preferred methods to organize the prevention routine. The main barrier for IPP implementation was lack of time within the athlete's weekly training schedule (66.66%). The majority of the participants (72.84%) reported to evaluate the perception of IPP's effect by comparing current and preceding seasons' injury occurrences. Conclusion These survey results are the first identifying contemporary sports injury prevention organization and implementation policies on an international level. This information might support the sports PT community in improving and standardizing IPP (implementation) strategies worldwide. [less ▲]

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See detailSample size dependence of tagged molecule dynamics in steady-state networks with bimolecular reactions: Cycle times of a light-driven pump
Asnicar, Daniele; Penocchio, Emanuele UL; Frezzato, Diego

in Journal of Chemical Physics (2022), 156(18), 184116

Here, steady-state reaction networks are inspected from the viewpoint of individual tagged molecules jumping among their chemical states upon the occurrence of reactive events. Such an agent-based ... [more ▼]

Here, steady-state reaction networks are inspected from the viewpoint of individual tagged molecules jumping among their chemical states upon the occurrence of reactive events. Such an agent-based viewpoint is useful for selectively characterizing the behavior of functional molecules, especially in the presence of bimolecular processes. We present the tools for simulating the jump dynamics both in the macroscopic limit and in the small-volume sample where the numbers of reactive molecules are of the order of few units with an inherently stochastic kinetics. The focus is on how an ideal spatial “compartmentalization” may affect the dynamical features of the tagged molecule. Our general approach is applied to a synthetic light-driven supramolecular pump composed of ring-like and axle-like molecules that dynamically assemble and disassemble, originating an average ring-through-axle directed motion under constant irradiation. In such an example, the dynamical feature of interest is the completion time of direct/inverse cycles of tagged rings and axles. We find a surprisingly strong robustness of the average cycle times with respect to the system’s size. This is explained in the presence of rate-determining unimolecular processes, which may, therefore, play a crucial role in stabilizing the behavior of small chemical systems against strong fluctuations in the number of molecules. [less ▲]

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See detailKinetic and energetic insights into the dissipative non-equilibrium operation of an autonomous light-powered supramolecular pump
Corra, Stefano; Baki, Marina Tranfi; Groppi, Jessica et al

in Nature Nanotechnology (2022)

Natural and artificial autonomous molecular machines operate by constantly dissipating energy coming from an external source to maintain a non-equilibrium state. Quantitative thermodynamic ... [more ▼]

Natural and artificial autonomous molecular machines operate by constantly dissipating energy coming from an external source to maintain a non-equilibrium state. Quantitative thermodynamic characterization of these dissipative states is highly challenging as they exist only as long as energy is provided. Here we report on the detailed physicochemical characterization of the dissipative operation of a supramolecular pump. The pump transduces light energy into chemical energy by bringing self-assembly reactions to non-equilibrium steady states. The composition of the system under light irradiation was followed in real time by 1H NMR for four different irradiation intensities. The experimental composition and photon flow were then fed into a theoretical model describing the non-equilibrium dissipation and the energy storage at the steady state. We quantitatively probed the relationship between the light energy input and the deviation of the dissipative state from thermodynamic equilibrium in this artificial system. Our results provide a testing ground for newly developed theoretical models for photoactivated artificial molecular machines operating away from thermodynamic equilibrium. [less ▲]

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See detailProfiles of cannabis consumption among school-aged children in Luxembourg
Lopes Ferreira, Joana UL; Catunda, Carolina UL

Poster (2022)

Background: Cannabis is the most widely used illegal drug globally, with almost 200 million users in 2019. This use is associated with many negative health consequences and social problems, such as low ... [more ▼]

Background: Cannabis is the most widely used illegal drug globally, with almost 200 million users in 2019. This use is associated with many negative health consequences and social problems, such as low school performance and other drug use. Cannabis use can be articularly harmful if it starts early, if it’s excessive or if it occurs associated with other forms of problematic behaviours. A lot of health behaviours, good or bad, emerge during adolescence and remain through the life course. Changing unhealthy behaviours in adolescence would significantly impact society, such as reducing the load of disease, injuries, and economic costs. The objective of this study is to explore cannabis consumption profiles and the factors related to it during adolescence. Methods: This study is based on the 2017/2018 Health Behaviour in School-aged Children Luxembourg survey. Participated 6 880 adolescents, aged 12 to 18-year-old, that attended schools in Luxembourg that teach according to the national. Adolescents answered if they used cannabis during their lifetime and during the past month. Following, they were categorized into 4 groups: 1. never consumed cannabis in a lifetime; 2. consumed in a lifetime but not in the past month; 3. non-daily use during the past month and; 4. daily use (or almost) during the past month. To compare and characterize the groups, descriptive and bivariate analyzes were undertaken, as well as their significance level. Results: Results show that most of the adolescents (81.8%) never consumed cannabis in their lifetime; 9.4% declared a consumption during their lifetime but not the past month; 6.6% used during the past month, non-daily; and 2.2% used (almost) daily during the past month. Different profiles emerge between the groups, particularly with regard to socio-demographic characteristics and risky behaviours. In the case of social relationships and indicators of health and well-being, differences exist but are not as pronounced. Boys, older students and those who do not live with both parents are more likely to be part of groups that have used cannabis. In addition, most risk behaviours show a dose-response relationship with cannabis use. The increase in risky behaviours translates into not only a greater likelihood of using cannabis but also a greater frequency of use. Conclusion: The four different profiles evolve gradually with the frequency of cannabis consumption. This dose-effect relationship has been highlighted between cannabis consumption and the other variables present but is especially true for risk behaviours. Prevention strategies should distinguish adolescents from each of these groups, starting in early adolescence and focus on risk behaviours as a whole. [less ▲]

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See detailAnger
Steffgen, Georges UL

in Maggino, F (Ed.) Encyclopedia of Quality of Life and Well-Being Research (2022)