References of "2018"
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See detailAssociations of wealth with frailty and memory impairment across the course of aging
Leist, Anja UL

Scientific Conference (2018, November)

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See detailAssociations of wealth with frailty and memory impairment across the course of aging
Leist, Anja UL

in Innovation in Aging (2018, November), 2(S1), 906

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See detailCréer des liens entre les formations d'enseignant et de travailleur social pour favoriser les liens professionnels ultérieurs
Dujardin, Céline UL; Poncelet, Débora UL

in Sulova, Lenka; Pourtois, Jean-Pierre; Desmet, Huguette (Eds.) et al La qualité de vie de l'enfant aujourd'hui (2018, November)

La plupart des enfants d’aujourd’hui fréquentent plusieurs institutions éducatives en dehors de la famille. Au Luxembourg, il s’agit d’abord de la maison relais qui est destinée à prendre le relais entre ... [more ▼]

La plupart des enfants d’aujourd’hui fréquentent plusieurs institutions éducatives en dehors de la famille. Au Luxembourg, il s’agit d’abord de la maison relais qui est destinée à prendre le relais entre l’école et la famille dans le but de permettre aux parents à mieux concilier la vie professionnelle et la vie familiale. Ensuite, d’autres institutions éducatives s’ajoutent à la prise en charge de l’enfant, notamment en cas de difficultés d’apprentissage qui nécessitent une prise en charge professionnelle extrascolaire ou en cas de difficultés liées au parent qui sera accompagné par un service d’assistance en famille et de soutien à la parentalité. L’Université du Luxembourg offre avec son Bachelor en Sciences de l’Education la formation des enseignants ainsi qu’avec son Bachelor en Sciences Sociales et Educatives la formation des travailleurs sociaux. Dans le but d’approcher les deux formations sur leurs points communs et leurs similitudes, nous constatons de plus en plus l’importance de ces liens. Les liens entre les deux formations réfèrent aux liens professionnels ultérieurs, primordiaux pour la co-éducation école-famille-communauté. Dans le cours universitaire « relations école-famille », nous avons mené une première expérience en automne 2016 avec les futurs enseignants en intégrant les autres institutions éducatives dans les relations école-famille afin de sensibiliser les futurs enseignants aux enfants et familles en difficulté. Pour finir, cette expérience dans la formation universitaire est confrontée aux conceptions de réflexion et d’attitude professionnelle de ces professions relationnelles. [less ▲]

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See detailCognitive functioning and decline in relation to urban environmental characteristics
Leist, Anja UL

Scientific Conference (2018, November)

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See detailTaxation of the Sharing Economy in the EU
Pantazatou, Aikaterini UL

in Infranca, John; Davidson, Nestor; Finck, Michele (Eds.) The Cambridge Handbook of the Law of the Sharing Economy (2018)

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See detailDécisions fiscales anticipées et confiance légitime - État des lieux et retour sur la notion d’opposabilité
Chaouche, Fatima UL

in Droit fiscal Luxembourgois - Livre Jubilaire IFA Luxembourg (2018)

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See detailDeterminants of cognitive decline in a large cross-national study using machine learning
Leist, Anja UL

in Innovation in Aging (2018, November), 2(S1), 244

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See detailDie technische Mündigkeit von Schüler/-innen zum Ende der Sek. I im internationalen Vergleich – Entwicklung eines Testwerkinstruments und erste Ergebnisse
Fletcher, Stefan; De Vries, Marc; Max, Charles UL

in Journal of Technical Education (2018), 6(4),

An international research team jointly conceived an item development model which was used to develop a new test instrument to measure the technology literacy of secondary school students. This tool was ... [more ▼]

An international research team jointly conceived an item development model which was used to develop a new test instrument to measure the technology literacy of secondary school students. This tool was used to assess the literacy skills of 270 pupils from Germany, Switzerland, Luxembourg, the Netherlands and England. The results show that 13 to 16 year old students display a poorly developed technology literacy level only. 25 per cent of the items on average were incorrectly answered with a high certainty sentiment, which suggests, that students do not only lack relevant knowledge in the field of technology but in addition also hold a rela-tively high number of strongly built misconceptions. Interestingly, there are no major differences between countries and gender. [less ▲]

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See detailEfficient Implementation of the SHA-512 Hash Function for 8-bit AVR Microcontrollers
Cheng, Hao UL; Dinu, Dumitru-Daniel; Groszschädl, Johann UL

in Lanet, Jean-Louis; Toma, Cristian (Eds.) Innovative Security Solutions for Information Technology and Communications, 11th International Conference, SecITC 2018, Bucharest, Romania, November 8-9, 2018, Revised Selected Papers (2018, November)

SHA-512 is a member of the SHA-2 family of cryptographic hash algorithms that is based on a Davies-Mayer compression function operating on eight 64-bit words to produce a 512-bit digest. It provides ... [more ▼]

SHA-512 is a member of the SHA-2 family of cryptographic hash algorithms that is based on a Davies-Mayer compression function operating on eight 64-bit words to produce a 512-bit digest. It provides strong resistance to collision and preimage attacks, and is assumed to remain secure in the dawning era of quantum computers. However, the compression function of SHA-512 is challenging to implement on small 8 and 16-bit microcontrollers because of their limited register space and the fact that 64-bit rotations are generally slow on such devices. In this paper, we present the first highly-optimized Assembler implementation of SHA-512 for the ATmega family of 8-bit AVR microcontrollers. We introduce a special optimization technique for the compression function based on a duplication of the eight working variables so that they can be more efficiently loaded from RAM via the indirect addressing mode with displacement (using the ldd and std instruction). In this way, we were able to achieve high performance without unrolling the main loop of the compression function, thereby keeping the code size small. When executed on an 8-bit AVR ATmega128 microcontroller, the compression function takes slightly less than 60k clock cycles, which corresponds to a compression rate of roughly 467 cycles per byte. The binary code size of the full SHA-512 implementation providing a standard Init-Update-Final (IUF) interface amounts to approximately 3.5 kB. [less ▲]

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See detailReflecting on teachers' practices as multimodally co-constructed in spatial reality
Arend, Béatrice UL

in Proceedings of ICERI2018 (2018, November)

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See detailIntravalley Spin-Flip Relaxation Dynamics in Single-Layer WS2
Wang, Zilong; Molina-Sanchez, Alejandro; Altmann, Patrick et al

in NANO LETTERS (2018), 18(11), 6882-6891

In monolayer (1L) transition metal dichalcogenides (TMDs) the valence and conduction bands are spin-split because of the strong spin-orbit interaction. In tungsten-based TMDs the spin-ordering of the ... [more ▼]

In monolayer (1L) transition metal dichalcogenides (TMDs) the valence and conduction bands are spin-split because of the strong spin-orbit interaction. In tungsten-based TMDs the spin-ordering of the conduction band is such that the so-called dark excitons, consisting of electrons and holes with opposite spin orientation, have lower energy than A excitons. The transition from bright to dark excitons involves the scattering of electrons from the upper to the lower conduction band at the K point of the Brillouin zone, with detrimental effects for the optoelectronic response of 1L-TMDs, since this reduces their light emission efficiency. Here, we exploit the valley selective optical selection rules and use two-color helicity-resolved pump-probe spectroscopy to directly measure the intravalley spin-flip relaxation dynamics in 1L-WS2. This occurs on a sub-ps time scale, and it is significantly dependent on temperature, indicative of phonon-assisted relaxation. Time-dependent ab initio calculations show that intravalley spin-flip scattering occurs on significantly longer time scales only at the K point, while the occupation of states away from the minimum of the conduction band significantly reduces the scattering time. Our results shed light on the scattering processes determining the light emission efficiency in optoelectronic and photonic devices based on 1L-TMDs. [less ▲]

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See detailSituative Interdisciplinarity: Empirical Reflections on Ten Years of Cross-Disciplinary Research
Reckinger, Rachel UL; Wille, Christian UL

in Academic Journal of Interdisciplinary Studies (2018), 7(3), 9-34

Given the current call for interdisciplinarity, we reflect on pragmatic methodological implementations of collaborative research – by drawing on empirical evidence from two large-scale cross-disciplinary ... [more ▼]

Given the current call for interdisciplinarity, we reflect on pragmatic methodological implementations of collaborative research – by drawing on empirical evidence from two large-scale cross-disciplinary research projects and by theoretically framing them in trilingual contexts (German, French, and English). These are two major innovations compared to the existing body of literature in this domain. Our empirical analysis shows that multi-, inter- or trans-disciplinary collaboration is an oscillating process along a spectrum of cross-disciplinarity – spanning additive, converging and synthesizing work patterns, i.e. multi-, inter-, and transdisciplinarity. Such an umbrella-term avoids the common amalgamation of ‘interdisciplinarity’ as the overarching category (cross-disciplinarity of whatever form) and one of the relevant subcategories (the specific work form that a research team chooses). Concretely, if the majority of methods are developed through communal negotiation processes, then a truly interdisciplinary analysis of research results can only be guaranteed through recursive self-reflexive loops. Initial research questions may still be additive and interactions can oscillate during the project process between addition und tentative convergence. We label this process situative interdisciplinarity. Multi-, inter- and transdisciplinarity are thus subsumed as a processual entity: flexible, possibly hybrid subforms of cross-disciplinarity. It needs constant reactivation, framing, timing and mediation by project managers. The major challenge lies in the collaborative transfer of concepts, theories, methods and research subjects. This transfer requires translation, explication and transposition of the various disciplinary ‘languages’ and can only be converged in an open-minded, team-oriented and reflexive work environment. [less ▲]

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See detailCase Law Review 2017/18
Sinnig, Julia UL

in Revue de Droit Fiscal (2018), 1(1), 28-32

This review provides an overview of important judgments in Luxembourg tax law of late 2017 and 2018. Discussed case law relates to the qualification of income from a redemption of shares not followed by a ... [more ▼]

This review provides an overview of important judgments in Luxembourg tax law of late 2017 and 2018. Discussed case law relates to the qualification of income from a redemption of shares not followed by a capital reduction; the definition of partnerships under Luxembourg tax law; the requirement to motivate an objection against VAT assessments; the exchange of tax information; the taxation of in-kind benefits in the hands of employees that are also shareholders and day-to-day managers of the employing company; and the definition of regular accounts as well as the final character of a minimum tax assessment and the scope of review of the director of the Luxembourg direct tax authority. [less ▲]

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See detailThe Reflection of Data-Driven Value Creation in the 2018 OECD and EU Proposals
Sinnig, Julia UL

in EC Tax Review (2018), 27(6), 325-334

Is the current corporate tax system fit for the digitalized economy? The 2018 interim report of the OECD and the proposals of the European Commission on the introduction of significant digital presence ... [more ▼]

Is the current corporate tax system fit for the digitalized economy? The 2018 interim report of the OECD and the proposals of the European Commission on the introduction of significant digital presence and a digital services tax give new insights into policymakers’ perception of ‘value creation’ and income generation in digitalized business models. Although the right way to tax digitalized business models seems disputed with regard to the diverging outcomes of the OECD’s and European Commission’s work so far, it seems to be of common understanding that user data are susceptible of establishing a taxable nexus. In a first step, this article aims at analysing how the collection and processing of user data may create such genuine link between an income generating activity and a state territory enabling this state to exercise its taxing right. In that respect, the concept of value creation, a driving concept in the discussion on how to tax digitalized businesses, is critically reviewed and an attempt to understand its real meaning is presented. In a second step, the article analyses to which extent the long- and short-term proposals of the European Commission reflect such data-driven (taxable) value creation, critically highlighting their main characteristics and flaws. [less ▲]

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See detailFLEXCAP – Cost competitive flexible process for highly aesthetic closures manufacturing
Kakogiannos, Ioannis UL; Hichri, Bassem UL; Plapper, Peter UL

in Kakogiannos, Ioannis; Hichri, Bassem; Plapper, Peter (Eds.) Robotix-Academy Conference for Industrial Robotics (RACIR) 2018 (2018, November)

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See detailAre octroyed constitutions of the 19th century to be considered as 'imposed constitutions'?
Gerkrath, Jörg UL

in Contiades, Xenophon; Albert, Richard; Fotiadou, Alkmene (Eds.) The Law and Legitimacy of Imposed Constitutions (2018, November)

The paper considers ‘octroyed’, ‘conceded’ or ‘granted’ constitutions of 19th century Europe whose common roots are to be found in the French ‘Charte constitutionnelle’ of 1814. These Charters stem from a ... [more ▼]

The paper considers ‘octroyed’, ‘conceded’ or ‘granted’ constitutions of 19th century Europe whose common roots are to be found in the French ‘Charte constitutionnelle’ of 1814. These Charters stem from a paternalistic process of domestic constitution-making engaged unilaterally by a monarch possessing the de facto constituent power and exercising it without the direct involvement of a body representing the people. Such octroyed constitutions, which are of course to be opposed to democratically established ones, show nevertheless a number of specific characteristics which distinguish them also from ‘imposed constitutions’ in the usual sense. The expression ‘constitutional octroy’ should not be used as a synonym for any process leading to an ‘imposed Constitution’. The contribution aims to develop and to validate or invalidate the value of a series of distinctive criteria and possible elements of a definition of ‘octroyed’ or ‘granted’ constitutions in order to underline their specificity. [less ▲]

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See detailUniform gradient estimates on manifolds with a boundary and applications
Cheng, Li Juan UL; Thalmaier, Anton UL; Thompson, James UL

in Analysis and Mathematical Physics (2018), 8(4), 571-588

We revisit the problem of obtaining uniform gradient estimates for Dirichlet and Neumann heat semigroups on Riemannian manifolds with boundary. As applications, we obtain isoperimetric inequalities, using ... [more ▼]

We revisit the problem of obtaining uniform gradient estimates for Dirichlet and Neumann heat semigroups on Riemannian manifolds with boundary. As applications, we obtain isoperimetric inequalities, using Ledoux's argument, and uniform quantitative gradient estimates, firstly for bounded C^2 functions with boundary conditions and then for the unit spectral projection operators of Dirichlet and Neumann Laplacians. [less ▲]

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