Last 7 days
Bookmark and Share    
See detailLocalisation résidentielle de la population étrangère selon la nationalité et la structure urbaine au Luxembourg
Pigeron-Piroth, Isabelle UL; Heinz, Andreas UL; Caruso, Geoffrey UL

Presentation (2017, June 19)

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the ... [more ▼]

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the different nationalities living in Luxembourg. It seeks to underline differences through indicators built from the 2011 census data. We focus on the territorial distribution of the different nationalities by taking into account the urban structure and distance to jobs. If differences according to nationalities in the residential behavior of households can be empirically identified they may raise issues of spatial equity and (un)equal accessibility to job market. We analyse whether the geographic location of different nationalities in Luxembourg is linked to urbanisation level, the distance to the “poles d´emploi” or general accessibility to jobs. [less ▲]

Detailed reference viewed: 6 (1 UL)
Full Text
See detailLocalisation résidentielle de la population étrangère selon la nationalité et la structure urbaine au Luxembourg
Pigeron-Piroth, Isabelle UL; Heinz, Andreas UL; Caruso, Geoffrey UL

E-print/Working paper (2017)

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the ... [more ▼]

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the different nationalities living in Luxembourg. It seeks to underline differences through indicators built from the 2011 census data. We focus on the territorial distribution of the different nationalities by taking into account the urban structure and distance to jobs. If differences according to nationalities in the residential behavior of households can be empirically identified they may raise issues of spatial equity and (un)equal accessibility to job market. We analyse whether the geographic location of different nationalities in Luxembourg is linked to urbanisation level, the distance to the “poles d´emploi” or general accessibility to jobs. [less ▲]

Detailed reference viewed: 18 (1 UL)
Full Text
Peer Reviewed
See detailRecent results on conservative and symmetric n-ary semigroups
Kiss, Gergely UL; Devillet, Jimmy UL; Marichal, Jean-Luc UL

Scientific Conference (2017, June 16)

See attached file

Detailed reference viewed: 26 (6 UL)
Full Text
Peer Reviewed
See detailOn conservative and associative operations on finite chains
Devillet, Jimmy UL; Couceiro, Miguel; Marichal, Jean-Luc UL

Scientific Conference (2017, June 16)

See attached file

Detailed reference viewed: 27 (10 UL)
Full Text
Peer Reviewed
See detailWhat industry wants from academia in software testing? Hearing practitioners’ opinions
Garousi, Vahid UL; Felderer, Michael; Kuhrmann, Marco et al

in Proceedings of International Conference on Evaluation and Assessment in Software Engineering (EASE) (2017, June 15)

The level of industry-academia collaboration (IAC) in software engineering in general and in software testing in particular is quite low. Many researchers and practitioners are not collaborating with the ... [more ▼]

The level of industry-academia collaboration (IAC) in software engineering in general and in software testing in particular is quite low. Many researchers and practitioners are not collaborating with the “other side” to solve industrial problems. To shed light on the above issue and to characterize precisely what industry wants from academia in software testing, we solicited practitioners’ opinions on their challenges in different testing activities and also the particularly relevant topics that they want the research community to work on. This short paper aims to draw the community’s attention to the important issue of strengthening IAC with the hope of more IAC in software testing in the areas of most importance to the industry. [less ▲]

Detailed reference viewed: 12 (3 UL)
Full Text
Peer Reviewed
See detailChoosing the Right Test Automation Tool: a Grey Literature Review of Practitioner Sources
Raulamo-Jurvanen, Päivi; Mäntylä, Mika; Garousi, Vahid UL

in Choosing the Right Test Automation Tool: a Grey Literature Review of Practitioner Sources (2017, June 15)

Background: Choosing the right software test automation tool is not trivial, and recent industrial surveys indicate lack of right tools as the main obstacle to test automation. Aim: In this paper, we ... [more ▼]

Background: Choosing the right software test automation tool is not trivial, and recent industrial surveys indicate lack of right tools as the main obstacle to test automation. Aim: In this paper, we study how practitioners tackle the problem of choosing the right test automation tool. Method: We synthesize the “voice” of the practitioners with a grey literature review originating from 53 different companies. The industry experts behind the sources had roles such as “Software Test Automation Architect”, and “Principal Software Engineer”. Results: Common consensus about the important criteria exists but those are not applied systematically. We summarize the scattered steps from individual sources by presenting a comprehensive process for tool evaluation with 12 steps and a total of 14 different criteria for choosing the right tool. Conclusions: The practitioners tend to have general interest in and be influenced by related grey literature as about 78% of our sources had at least 20 backlinks (a reference comparable to a citation) while the variation was between 3 and 759 backlinks. There is a plethora of different software testing tools available, yet the practitioners seem to prefer and adopt the widely known and used tools. The study helps to identify the potential pitfalls of existing processes and opportunities for comprehensive tool evaluation. [less ▲]

Detailed reference viewed: 31 (4 UL)
Full Text
Peer Reviewed
See detailIndustry-academia collaborations in software engineering: an empirical analysis of challenges, patterns and anti-patterns in research projects
Garousi, Vahid UL; Felderer, Michael; Fernandes, João et al

in Proceedings of International Conference on Evaluation and Assessment in Software Engineering (EASE) (2017, June 15)

Research collaboration between industry and academia supports improvement and innovation in industry and helps to ensure industrial relevance in academic research. However, many researchers and ... [more ▼]

Research collaboration between industry and academia supports improvement and innovation in industry and helps to ensure industrial relevance in academic research. However, many researchers and practitioners believe that the level of joint industry-academia collaboration (IAC) in software engineering (SE) research is still relatively low, compared to the amount of activity in each of the two communities. The goal of the empirical study reported in this paper is to exploratory characterize the state of IAC with respect to a set of challenges, patterns and anti-patterns identified by a recent Systematic Literature Review study. To address the above goal, we gathered the opinions of researchers and practitioners w.r.t. their experiences in IAC projects. Our dataset includes 47 opinion data points related to a large set of projects conducted in 10 different countries. We aim to contribute to the body of evidence in the area of IAC, for the benefit of researchers and practitioners in conducting future successful IAC projects in SE. As an output, the study presents a set of empirical findings and evidence-based recommendations to increase the success of IAC projects. [less ▲]

Detailed reference viewed: 13 (0 UL)
Full Text
See detailComputational Aspects of Classical and Hilbert Modular Forms
van Hirtum, Jasper UL

Doctoral thesis (2017)

The main topic of this thesis is the study of classical and Hilbert modular forms and computational aspects of their q-expansions. The coefficients of q-expansions of eigenforms are particularly ... [more ▼]

The main topic of this thesis is the study of classical and Hilbert modular forms and computational aspects of their q-expansions. The coefficients of q-expansions of eigenforms are particularly interesting because of their arithmetic significance. Most notably, modular forms are an essential ingredient in Andrew Wiles’s proof of Fermat’s last theorem. This thesis consists of two parts: the first part concerns the distribution of the coefficients of a given classical eigenform; the second part studies computational aspects of the adelic q-expansion of Hilbert modular forms of weight 1. Part I of this thesis is an adapted version of the article On the Distribution of Frobenius of Weight 2 Eigenforms with Quadratic Coefficient Field published in Experimental Mathematics [38]. It presents a heuristic model that settles the following question related to the Sato-Tate and Lang-Trotter conjectures: given a normalised eigenform of weight 2 with quadratic coefficient field, what is the asymptotic behaviour of the number of primes p such that the p-th coefficient of this eigenform is a rational integer? Our work contributes to this problem in two ways. First, we provide an explicit heuristic model that describes the asymptotic behaviour in terms of the associated Galois representation. Secondly, we show that this model holds under reasonable assumptions and present numerical evidence that supports these assumptions. Part II concerns the study of (adelic) q-expansions of Hilbert modular forms. Our main achievements are the design, proof and implementation of several algorithms that compute the adelic q-expansions of Hilbert modular forms of weight 1 over C and over finite fields. One reason we are studying such q-expansions is that their coefficients (conjecturally) describe the arithmetic of Galois extensions of a totally real number field with Galois group in GL 2 (F p ) that are unramified at p. Using the adelic q-expansions of Hilbert modular forms of higher weight, these algorithms enable the explicit computation of Hilbert modular forms of any weight over C and the computation of Hilbert modular forms of parallel weight both over C and in positive characteristics. The main improvement to existing methods is that this algorithm can be applied in (partial) weight 1, which fills the gap left by standard computational methods. Moreover, the algorithm computes in all characteristics simultaneously. More precisely, we prove that, under certain conditions in higher weight, the output of the algorithm for given level N and quadratic character E includes a finite set of primes L such that all Hilbert modular forms of given parallel weight, level N and quadratic character E over F p are liftable for all primes p outside the set L. In particular, testing primes in the set L enabled the computation of examples of non-liftable Hilbert modular forms of weight 1. [less ▲]

Detailed reference viewed: 9 (5 UL)
See detailOn the arithmetic of modular forms
Wiese, Gabor UL

Scientific Conference (2017, June 15)

In this short overview talk, we will stress the arithmetic significance of the coefficients of modular forms. This naturally leads to questions on the distribution of the coefficients in various senses ... [more ▼]

In this short overview talk, we will stress the arithmetic significance of the coefficients of modular forms. This naturally leads to questions on the distribution of the coefficients in various senses. We will briefly touch on some of them and state some open questions. The arithmetic information in the coefficients of a Hecke eigenform is summarised in the attached Galois representation. When studying its ramification properties, one notices that forms of weight one play a special role that we will explain. [less ▲]

Detailed reference viewed: 7 (2 UL)
Full Text
See detailAn Enriched Quasi-Continuum Approach to Crack Propagation in Discrete Lattices
Rokos, Ondrej; Peerlings, Ron; Zeman, Jan et al

Scientific Conference (2017, June 14)

Detailed reference viewed: 6 (0 UL)
Peer Reviewed
See detailPerspectives on multilingualism and language learning and literacy practices of early years practitioners in Luxembourg
Kirsch, Claudine UL

Scientific Conference (2017, June 14)

Multilingual pedagogies hold promise in our heterogeneous and fast developing world on account of their inclusiveness and support for social justice and political participation. In order to help early ... [more ▼]

Multilingual pedagogies hold promise in our heterogeneous and fast developing world on account of their inclusiveness and support for social justice and political participation. In order to help early years practitioners develop these innovative methods, researchers at the university of Luxembourg offered an inquiry-based professional development course which aimed to develop the practitioners’ understanding of multilingualism, help them design literacy activities in a range of languages, and enable them to evaluate their practices. The participants were teachers and para-professionals who work with 3- to 5-year-olds in nursery schools, crèches and day care centers. These institutions focus on the learning of Luxembourgish, sometimes at the expense of home languages and of French and German, both official languages in Luxembourg. The focus on Luxembourgish must be seen in relation to the heterogeneous intake where approximately 60% of the children do not speak Luxembourgish. This paper presents the preliminary findings of a questionnaire on multilingualism, language learning and literacy practices answered by 50 practitioners prior to and following the above-mentioned professional development course. The data were triangulated with the practitioners’ video-recorded language activities. The findings show that the teachers and para-professionals view multilingualism positively and promote Luxembourgish through language use and frequent literacy activities. They occasionally communicated with the youngsters in their home languages - if known - and did not object to the children using them with peers and adults. While almost all practitioners stated that the children spoke in their home language, they diverged in their beliefs regarding the appropriateness of their use. Answers were more convergent in the post-test. The findings should deepen our understanding of early years practitioners’ beliefs and language practices and help find strategies for developing multilingual pedagogies. [less ▲]

Detailed reference viewed: 17 (0 UL)
See detailLa papauté et les communautés religieuses en Lorraine (Xe - XIIe siècles)
Engl, Hannes UL

Presentation (2017, June 14)

Detailed reference viewed: 21 (4 UL)
Full Text
See detailL’infra-ordinaire et l’imaginaire des Stations-service
Kmec, Sonja UL

Conference given outside the academic context (2017)

Detailed reference viewed: 10 (1 UL)
Peer Reviewed
See detailEngagierte linke Jugendliche und die Ambivalenz in der Gewaltfrage
Willems, Helmut UL; Kühnel, Wolfgang

in Willems, Helmut; Kühnel, Wolfgang (Eds.) Politisches Engagement im Jugendalter : Zwischen Beteiligung, Protest und Gewalt (2017)

Detailed reference viewed: 37 (5 UL)
See detailPolitisches Engagement im Jugendalter : Zwischen Beteiligung, Protest und Gewalt
Willems, Helmut UL

Book published by Beltz Juventa (2017)

Detailed reference viewed: 18 (1 UL)
Full Text
Peer Reviewed
See detailLuxembourgish English pronunciation: first forays
Deroey, Katrien UL

Scientific Conference (2017, June 10)

Detailed reference viewed: 7 (0 UL)