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See detailLegitimate expectations in Luxembourg tax law - A study of administrative circulars and tax rulings issued by the Luxembourg tax authorities
Chaouche, Fatima UL

Doctoral thesis (2018)

This thesis analyzes the status of tax circulars and tax rulings in domestic law. More precisely, by first studying the status of each of these administrative interpretative acts, I then investigate their ... [more ▼]

This thesis analyzes the status of tax circulars and tax rulings in domestic law. More precisely, by first studying the status of each of these administrative interpretative acts, I then investigate their enforceability before domestic courts and enquire to what extent unlawful circulars and contra legem rulings can be relied upon by virtue of the principle of legitimate expectations. After extracting a series of shortcomings in the protection of taxpayers who rely on such administrative interpretative acts, I then, articulate from a normative perspective, what I claim to be the appropriate level of protection for contra legem circulars and advance decisions in the Luxembourg legal order. [less ▲]

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See detailReport: The European Commission's e-Evidence Proposals
Robinson, Gavin UL

in European Data Protection Law Review (2018), (3),

In April 2018, the European Commission presented a legislative package intended to enable, foster and formalise cross-border access by national judicial authorities to electronic evidence controlled by ... [more ▼]

In April 2018, the European Commission presented a legislative package intended to enable, foster and formalise cross-border access by national judicial authorities to electronic evidence controlled by private service providers.1 In particular the public-private character of the ‘cooperation’ envisaged in the proposed set-up raises several questions at the interface of criminal procedure and data protection law. This report provides a brief overview of the proposed EUlegislation and an introduction to themost salient attendant legal and policy-related issues. [less ▲]

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See detailChanges in preservice teachers´ attitudes toward inclusion: the role of competence
Pit-Ten Cate, Ineke UL; Krischler, Mireille Gilberte Pauline UL

Scientific Conference (2018, September 13)

Following policies to promote a more equitable and inclusive educational system, the question arises how to prepare teachers to accommodate an increasingly heterogeneous student population. As teachers´ ... [more ▼]

Following policies to promote a more equitable and inclusive educational system, the question arises how to prepare teachers to accommodate an increasingly heterogeneous student population. As teachers´ competence concerning inclusion is grounded in their training (e.g. Baker-Ericzen et al. 2009), courses focussing on inclusion as an educational practice could reduce uncertainties (e.g. Carroll et al. 2003). However, inclusion not only depends on teachers´ competence but also on their attitudes. Teachers’ attitudes may be pivotal for the success of inclusive education as they can elicit differential expectations and behaviors, which can enhance or limit the successful inclusion of students with special educational needs (SEN). Avramidis and Norwich (2002) stressed the importance of training in the formation of positive attitudes toward the integration of students with SEN. Although several studies have reported positive changes in attitudes following a course on inclusive education (e.g. Shade & Stewart, 2001), the relationship between competence and attitudes is less clear. Therefore, this study aimed to evaluate the effect of a course on inclusive pedagogy on competence and attitudes and the association between these constructs. Data were collected for 69 preservice teachers enrolled in a course on inclusive pedagogy. Attitudes toward the inclusion of students with SEN were assessed before and after the course, using the German version of The Opinions Relative to Integration of Students with Disabilities questionnaire (ORI; Benoit & Bless, 2014). In addition, at the end of the course students indicated to what extend the course had helped them to gain knowledge, skills and strategies concerning teaching a heterogeneous student population. Results of a repeated measures 2×4 ANOVA, with time (pre vs. post) and attitude towards inclusion (ORI subscales) as within group factors showed a main effect for attitudes, reflecting variations between the subscale scores. A significant time × attitudes interaction effect indicated positive attitude changes over time, but only in the domain of educational and social progression of students with SEN. Results of a regression analysis indicated that, after controlling for pre-course attitude ratings, perceived competence predicted attitude ratings at the end of the course. This study shows that teacher training can positively affect both teachers´ competence and attitudes concerning inclusive education, whereby perceived competence contributed to positive attitude change. [less ▲]

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See detail(In)flexible Language Use in a Year 4 Class in Luxembourg: Which Languages in Which Subjects?
Kirsch, Claudine UL; Degano, Sarah UL

Scientific Conference (2018, September 06)

The project described in this paper is part of the broader research project ‘Capitalizing on Linguistic Diversity in Education’ that investigates how multilingualism can be used as a resource for ... [more ▼]

The project described in this paper is part of the broader research project ‘Capitalizing on Linguistic Diversity in Education’ that investigates how multilingualism can be used as a resource for educational success and social well-being in Luxembourg. Research projects in preschool, Year 1 and Year 2 classes show that teachers have begun to draw on children’s semiotic repertoires (Kirsch 2017, Kirsch and Bes 2017). The present doctoral research project aims to understand the ways in which and the extent to which, first, Year 4 and Year 5 teachers in three schools address linguistic diversity and, second, children draw on their language repertoire to learn. The focus lies on the translanguaging practices of teachers and children. Translanguaging is a pillar of multilingual pedagogies which promote social equity and build on socio-constructivist learning theories (García & Li Wei 2014). The education system in Luxembourg is trilingual in Luxembourgish, German and French. The curriculum is based on monoglossic ideologies and a compartmentalised view of language teaching (De Korne 2012). The system is particularly challenging for the 63.5 percent of primary school children who do not speak Luxembourgish as a first language and underachieve compared to the Luxembourgish-speakers (Menje 2017). This paper draws its data from six days of observations and video-recordings of learning activities in seven French, eight Mathematics and two Arts lessons from September 2017 to January 2018 in one school characterised by the diversity of its intake and the high SES of the families. The data collection is still on-going. The participants are the two teachers of the Year 4 class and three focus children of Slovenian, French and Icelandic background. The thematic analysis focuses on the type of learning activities, the school subjects, the speech acts, the language use, and the pedagogical use of translanguaging. The preliminary findings show that almost all learning activities are teacher-led and that interactions are based on initiation-response-feedback sequences. The teachers systematically translanguage between a target language and the other curricula languages to scaffold learning, build relationships and manage the classroom. Both teachers and children create a specific space for German which is highly unusual in Luxembourg. The children rarely draw on their home languages unless these are the three languages of the country. While translanguaging is frequently used as a scaffold, it is neither transformative nor does it contribute to raising equal opportunities (García & Kleyn 2016). [less ▲]

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See detailA Closer Look at Real-World Patches
Liu, Kui UL; Kim, Dongsun UL; Koyuncu, Anil UL et al

Scientific Conference (2018, September)

Bug fixing is a time-consuming and tedious task. To reduce the manual efforts in bug fixing, researchers have presented automated approaches to software repair. Unfortunately, recent studies have shown ... [more ▼]

Bug fixing is a time-consuming and tedious task. To reduce the manual efforts in bug fixing, researchers have presented automated approaches to software repair. Unfortunately, recent studies have shown that the state-of-the-art techniques in automated repair tend to generate patches only for a small number of bugs even with quality issues (e.g., incorrect behavior and nonsensical changes). To improve automated program repair (APR) techniques, the community should deepen its knowledge on repair actions from real-world patches since most of the techniques rely on patches written by human developers. Previous investigations on real-world patches are limited to statement level that is not sufficiently fine-grained to build this knowledge. In this work, we contribute to building this knowledge via a systematic and fine-grained study of 16,450 bug fix commits from seven Java open-source projects. We find that there are opportunities for APR techniques to improve their effectiveness by looking at code elements that have not yet been investigated. We also discuss nine insights into tuning automated repair tools. For example, a small number of statement and expression types are recurrently impacted by real-world patches, and expression-level granularity could reduce search space of finding fix ingredients, where previous studies never explored. [less ▲]

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See detailParallel Coupling of CFD-DEM simulations
Pozzetti, Gabriele UL; Besseron, Xavier UL; Rousset, Alban UL et al

Presentation (2018, August)

Eulerian-Lagrangian couplings are nowadays widely used to address engineering and technical problems. In particular, CFD-DEM couplings have been successfully applied to study several configurations ... [more ▼]

Eulerian-Lagrangian couplings are nowadays widely used to address engineering and technical problems. In particular, CFD-DEM couplings have been successfully applied to study several configurations ranging from mechanical, to chemical and environmental engineering. However, such simulations are normally very computationally intensive, and the execution time represents a major issue for the applicability of this numerical approach to complex scenarios. With this work, we introduce a novel coupling approach aiming at improving the performance of the parallel CFD-DEM simulations. This strategy relies on two points. First, we propose a new partition-collocation strategy for the parallel execution of CFD–DEM couplings, which can considerably reduce the amount of inter-process communication between the CFD and DEM parts. However, this strategy imposes some alignment constraints on the CFD mesh. Secondly, we adopt a dual-grid multiscale scheme for the CFD-DEM coupling, that is known to offer better numerical properties, and that allows us to obtain more flexibility on the domain partitioning overcoming the alignment constraints. We assess the correctness and performance of our approach on elementary benchmarks and at a large scale with a realistic test-case. The results show a significant performance improvement compared to other state-of-art CFD-DEM couplings presented in the literature. [less ▲]

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See detailA systems-wide understanding of photosynthetic acclimation in algae and higher plants
Wanjiku Moejes, Fiona; Matuszyńska, Anna; Adhikari, Kailash et al

in Journal of Experimental Botany (2017), 68(11), 26672681

The ability of phototrophs to colonise different environments relies on robust protection against oxidative stress, a critical requirement for the successful evolutionary transition from water to land ... [more ▼]

The ability of phototrophs to colonise different environments relies on robust protection against oxidative stress, a critical requirement for the successful evolutionary transition from water to land. Photosynthetic organisms have developed numerous strategies to adapt their photosynthetic apparatus to changing light conditions in order to optimise their photosynthetic yield, which is crucial for life on Earth to exist. Photosynthetic acclimation is an excellent example of the complexity of biological systems, where highly diverse processes, ranging from electron excitation over protein protonation to enzymatic processes coupling ion gradients with biosynthetic activity, interact on drastically different timescales from picoseconds to hours. Efficient functioning of the photosynthetic apparatus and its protection is paramount for efficient downstream processes, including metabolism and growth. Modern experimental techniques can be successfully integrated with theoretical and mathematical models to promote our understanding of underlying mechanisms and principles. This review aims to provide a retrospective analysis of multidisciplinary photosynthetic acclimation research carried out by members of the Marie Curie Initial Training Project, AccliPhot, placing the results in a wider context. The review also highlights the applicability of photosynthetic organisms for industry, particularly with regards to the cultivation of microalgae. It intends to demonstrate how theoretical concepts can successfully complement experimental studies broadening our knowledge of common principles in acclimation processes in photosynthetic organisms, as well as in the field of applied microalgal biotechnology. [less ▲]

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See detailAstrophysical aspects of dark matter direct detection
Magni, Stefano UL

Doctoral thesis (2015)

Detailed reference viewed: 35 (2 UL)
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See detailMaking sense of the local Galactic escape speed estimates in direct dark matter searches
Lavalle, Julien; Magni, Stefano UL

in Physical Review. D. (2015), 91(2), 023510

Direct detection (DD) of dark matter (DM) candidates in the ≲10 GeV mass range is very sensitive to the tail of their velocity distribution. The important quantity is the maximum weakly interacting ... [more ▼]

Direct detection (DD) of dark matter (DM) candidates in the ≲10 GeV mass range is very sensitive to the tail of their velocity distribution. The important quantity is the maximum weakly interacting massive particle speed in the observer's rest frame, i.e. in average the sum of the local Galactic escape speed v[SUB]esc[/SUB] and of the circular velocity of the Sun v[SUB]c[/SUB]. While the latter has been receiving continuous attention, the former is more difficult to constrain. The RAVE Collaboration has just released a new estimate of v[SUB]esc[/SUB] [T. Piffl et al., Astron. Astrophys. 562, A91 (2014)] that supersedes the previous one [M. C. Smith, et al. Mon. Not. R. Astron. Soc. 379, 755 (2007)], which is of interest in the perspective of reducing the astrophysical uncertainties in DD. Nevertheless, these new estimates cannot be used blindly as they rely on assumptions in the dark halo modeling which induce tight correlations between the escape speed and other local astrophysical parameters. We make a self-consistent study of the implications of the RAVE results on DD assuming isotropic DM velocity distributions, both Maxwellian and ergodic. Taking as references the experimental sensitivities currently achieved by LUX, CRESST-II, and SuperCDMS, we show that (i) the exclusion curves associated with the best-fit points of P14 may be more constraining by up to ˜40 % with respect to standard limits, because the underlying astrophysical correlations induce a larger local DM density, and (ii) the corresponding relative uncertainties inferred in the low weakly interacting massive particle mass region may be moderate, down to 10-15% below 10 GeV. We finally discuss the level of consistency of these results with other independent astrophysical constraints. This analysis is complementary to others based on rotation curves. [less ▲]

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See detailOn the use of the escape speed estimates in setting dark matter direct detection limits
Magni, Stefano UL; Lavalle, J.

in Proceedings, International Conference: "50th Rencontres de Moriond Electroweak Interactions and Unified Theories" La Thuile, Italy, March 14-21 (2015)

The knowledge of the high velocity tail of the WIMP velocity distribution has a strong impact on the way direct detection (DD) may constrain or discover light WIMPs in the GeV mass range. Recently, there ... [more ▼]

The knowledge of the high velocity tail of the WIMP velocity distribution has a strong impact on the way direct detection (DD) may constrain or discover light WIMPs in the GeV mass range. Recently, there have been important observational efforts to estimate the so-called Galactic escape speed at the position of the Earth, for instance the analysis published in early 2014 by the RAVE Collaboration ' , which is of interest in the perspective of reducing the astrophysical uncertainties in DD. Nevertheless, these new estimates cannot be used blindly as they rely on assumptions in the dark halo modeling, which induce tight correlations between the escape speed and other local astrophysical parameters (e.g. the local circular speed and dark matter density). We make a self-consistent study of the implications of the RAVE results on DD assuming isotropic DM velocity distributions, both Maxwellian and ergodic. Taking as reference the experimental sensitivities currently achieved by LUX, CRESST2, and SuperCDMS, we show that the DD constraints on WIMPs (and associated uncertainties) are slightly stronger (moderate). [less ▲]

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See detailRevisiting the escape speed impact on dark matter direct detection
Magni, Stefano UL; Lavalle, J.

in Proceedings, International Conference: "Frontiers of Fundamental Physics '14", Marseille, France, July 15-18 (2014)

The knowledge of the high velocity tail of the WIMP (Weakly Interacting Massive Particles) velocity distribution has a strong impact on the way dark matter direct detection (DMDD) may constrain or ... [more ▼]

The knowledge of the high velocity tail of the WIMP (Weakly Interacting Massive Particles) velocity distribution has a strong impact on the way dark matter direct detection (DMDD) may constrain or discover light WIMPs in the GeV mass range. Recently, there have been important observational efforts to estimate the Galactic escape speed at the position of the Earth, like for instance the analysis published in early 2014 by the RAVE Collaboration (Piffl et al., 2014), which is of interest in the perspective of reducing the astrophysical uncertainties in DMDD. Nevertheless, these new estimates cannot be used blindly as they rely on assumptions on the Milky Way mass distribution, which induce tight correlations between the escape speed and other local astrophysical parameters (circular speed and dark matter density). We make a self-consistent study of the implications of the RAVE results on DMDD assuming isotropic DM velocity distributions, both Maxwellian and ergodic. Taking as reference the experimental sensitivities currently achieved by LUX, CRESST2, and SuperCDMS, we show that the uncertainties inferred for the exclusion curves in the low WIMP mass region are moderate, ranging from 10% to 20% , and that the RAVE results imply large values of r , and so correspond to exclusion curves that are more constraining than the standard ones by 40%. [less ▲]

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See detailCampus Revolt Movie
Pause, Johannes UL

in Wulff, Hans Jürgen (Ed.) Lexikon der Filmbegriffe (2012)

Detailed reference viewed: 8 (1 UL)
See detailWirtschaftskrimi
Pause, Johannes UL

in Wulff, Hans Jürgen (Ed.) Lexikon der Filmbegriffe (2012)

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See detailBackreaction and the Covariant Formalism of General Relativity
Magni, Stefano UL

Bachelor/master dissertation (2012)

This thesis is a review of backreaction, which is a possible alternative to dark energy and modified gravity. We describe in detail the 3+1 covariant formalism and Frobenius' theorem. We present the ... [more ▼]

This thesis is a review of backreaction, which is a possible alternative to dark energy and modified gravity. We describe in detail the 3+1 covariant formalism and Frobenius' theorem. We present the averaging procedure developed by Buchert, the Buchert equations and the generalization of these equations to the case of general matter. We then generalize to arbitrary number of spatial dimensions. We focus on the case of 2+1 dimensions, where the relation between the topology and the geometry of a surface imposes a global constraint on backreaction. [less ▲]

Detailed reference viewed: 12 (5 UL)