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See detailSupporting Security Protocols on CAN-Based Networks
Bloom, Gedare; Cena, Gianlua; Cibrario Bertolotti, Ivan et al

Scientific Conference (in press)

The ever-increasing variety of services built on top of the Controller Area Network (CAN), along with the recent discovery of vulnerabilities in CAN-based automotive systems (some of them demonstrated in ... [more ▼]

The ever-increasing variety of services built on top of the Controller Area Network (CAN), along with the recent discovery of vulnerabilities in CAN-based automotive systems (some of them demonstrated in practice) stimulated a renewed attention to security-oriented enhancements of the CAN protocol. The issue is further compounded nowadays because, unlike in the past, security can no longer be enforced by physical bus segregation. This paper describes how CAN XR, a recently proposed extension of the CAN data-link layer, can effectively support the distributed calculation of arbitrary binary Boolean functions, which are the foundation of most security protocols, without necessarily disclosing their operands on the bus. The feasibility of the approach is then shown through experimental evaluation and by confirming its applicability to a shared key generation protocol proposed in literature. [less ▲]

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See detailRelay Selection and Transceiver Design for Joint Wireless Information and Energy Transfer in Cooperative Networks
Gautam, Sumit UL; P, Ubaidulla

Scientific Conference (2017, June 04)

In this paper, we consider optimal transceiver design and relay selection for simultaneous transfer of data and energy in a cooperative network consisting of amplify-and-forward (AF) relays. In this ... [more ▼]

In this paper, we consider optimal transceiver design and relay selection for simultaneous transfer of data and energy in a cooperative network consisting of amplify-and-forward (AF) relays. In this context, we address two different problems and propose optimal relay selection and transceiver processing. Furthermore, the problems are formulated for both time switching (TS) and power splitting (PS) schemes. The first problem is the maximization of overall rate while ensuring a minimum harvested energy at the receiver. For this problem, we perform computations of optimal fractions to distribute the received signal corresponding to TS and PS schemes, the relay weighing coefficients, and optimal relay selection. In the second problem, optimal resource allocation for maximizing the overall harvested energy at the user under constraints on the minimum achievable rate has been formulated. For this problem, we propose a suitable solution to meet the requirements for both TS and PS. For both the problems, we obtain a closed form solution. Finally, the performance of proposed design under various operating conditions and parameter values are illustrated with a comparison between TS and PS schemes. [less ▲]

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See detailHigh Frequency Acoustic Scattering in Isogeometric Analysis
Khajah, Tahsin; Antoine, Xavier; Bordas, Stéphane UL

Scientific Conference (2017, May 15)

There is an emerging need to perform high frequency scattering analysis on high-fidelity models. Conventional Finite Element analysis suffers from irretrievable loss of the boundary accuracy as well as ... [more ▼]

There is an emerging need to perform high frequency scattering analysis on high-fidelity models. Conventional Finite Element analysis suffers from irretrievable loss of the boundary accuracy as well as pollution error. Man-made geometries can be represented exactly in Isogeometric Analysis (IGA) with no geometrical loss even with very coarse mesh. The aim of this paper is to analyze the accuracy of IGA for exterior acoustic scattering problems. The numerical results show extremely low pollution error even for very high frequencies. [less ▲]

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See detailInnovations and sales growth in new ventures: The mediating effect of growth intention
Gundolf, Katherine; Geraudel, Mickaël UL; Cesinger, Beate

Scientific Conference (2017, May 11)

While the direct impact of innovation on growth has been examined in entrepreneurship literature, the underlying channels of influence have remained largely unexplored. This article draws upon Behavioral ... [more ▼]

While the direct impact of innovation on growth has been examined in entrepreneurship literature, the underlying channels of influence have remained largely unexplored. This article draws upon Behavioral Reasoning Theory to examine whether growth intention is the pathway through which product, process and organizational innovations influence venture growth or not. Results from the analysis of a dataset of 20,472 French new ventures reveal that: (1) product, process and organizational innovations have a positive impact on sales revenue growth; (2) growth intention has a positive impact on sales revenue growth; and (3) growth intention mediates the effects of product and organizational innovations on sales revenue growth. These findings have implications for a more balanced and nuanced view on how innovations impact new venture growth. [less ▲]

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See detailThe Effects of Sexualized Violence in Video Games on Rape Myth Acceptance
Fernandez de Henestrosa, Martha UL; Melzer, André UL

Scientific Conference (2017, May)

Previous research has tested the effects of video games on players’ Rape Myth Acceptance (RMA) with regard to either sexual or violent contents. The current study aimed at investigating the combined ... [more ▼]

Previous research has tested the effects of video games on players’ Rape Myth Acceptance (RMA) with regard to either sexual or violent contents. The current study aimed at investigating the combined effects of sexual and violent material in video games on players’ RMA. Participants (N = 82) played either a sexualized female game character or a non-sexualized female game character in a violent video game. Participants’ pre-gaming RMA, gender role attitudes and gaming habits were found to predict RMA after the gaming episode, but sexualized game violence did not. Furthermore, no gender differences were found with regard to RMA. The present findings corroborate the important role of pre-existing gender attitudes for the concept of RMA. In addition, future research should also focus on long-term exposure to video games and players’ gaming habits when examining the effects of sexualized violence in video games on RMA. [less ▲]

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See detailDiscrimination of Angle-Doppler Signatures using Arbitrary Phase Center Motion for MIMO Radars
Hammes, Christian UL; Nijsure, Yogesh UL; Shankar, Bhavani UL et al

Scientific Conference (2017, May)

A novel Phase Center Motion (PCM) based technique for discriminating angle-Doppler signatures within Multiple-Input-Multiple-Output (MIMO) radars using Frequency Modulated Continuous Wave (FMCW) has been ... [more ▼]

A novel Phase Center Motion (PCM) based technique for discriminating angle-Doppler signatures within Multiple-Input-Multiple-Output (MIMO) radars using Frequency Modulated Continuous Wave (FMCW) has been explored in this work. The PCM technique induces angle dependent Doppler shifts in the back-scattered signal, wherein a modified Doppler post processing for FMCW leads to joint angle-Doppler processing. Specifically, we intend to design unique spatialtemporal motion of the phase center on each individual MIMO radar channel in an effort to synthesize nearly orthogonal angle- Doppler signatures. Subsequently, we also develop a MIMO radar receiver design, which would be capable of discriminating between these induced angle-Doppler signatures. The asymptotic investigation provides a Bessel function characteristic. Simulation results demonstrate a significant side-lobe suppression of 8:5 dB for an individual PCM trajectory and 7 dB over distinct PCM trajectories, in an attempt towards realization of nearly orthogonal MIMO radar channels. [less ▲]

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See detailDynamic qualitative filtering for linked (geo)visualisations: a prototype for exploring the collective memory of Instagram posts
Jones, Catherine UL; Guido, Daniele UL; Severo, Marta

Scientific Conference (2017, April 20)

This paper describes a prototype geo extension to an open source graph-based tool designed for analysing co-occurrence in large multimedia collections of historical resources. Employing an ... [more ▼]

This paper describes a prototype geo extension to an open source graph-based tool designed for analysing co-occurrence in large multimedia collections of historical resources. Employing an interdisciplinary approach, combining tools and practices from humanities and geography, we explore how it can be extended to facilitate both social and spatial enquiry. For the prototype development we use Instagram resources that reference the Via Francigena – a significant cultural route connecting Canterbury, UK and Rome, Italy. The resulting tool facilitates dynamic qualitative filtering and multilevel views to explore the social-spatial collective memory of this cultural route [less ▲]

See detailLocational and socio-economic sorting in the use of green space: Evidence from Brussels
Schindler, Mirjam UL; Le Texier, Marion UL; Caruso, Geoffrey UL

Scientific Conference (2017, April 08)

Urban green space is important for making cities sustainable. It provides environmental benefits and makes cities attractive to people. Extensive evidence exists on their benefits but is lacking in ... [more ▼]

Urban green space is important for making cities sustainable. It provides environmental benefits and makes cities attractive to people. Extensive evidence exists on their benefits but is lacking in quantifying how and whether socio-economic benefits of green space accrue to all households or only a portion depending on their socio-economic status and residential location. From urban economic theory we know that residential markets sort households by income along an urban–suburban continuum and the housing-transport-costs trade-off. This trade-off can however be dominated in the presence of exogenous central amenities (parks) or endogenous effects (high income attracting high income) and pull better-off households toward the center, adding discrepancies in accessibility to green amenities by different socio-economic groups. Tiebout's hypothesis implied that marginal benefits from localised amenities are the same for all households in a given location but empirics point to non-efficient sorting and endogenous effects (socio-economic sorting) in the demand for localised amenities in general. We address these questions based on results of a survey conducted along an urban-suburban continuum in Brussels (Belgium) in May 2016. The survey includes around 500 respondents sampled across (non-park) public space and malls to reach both users and non-users of green space and cover the variety of residential locations (good or bad provision of green / distant or far from the CBD). We analyse the role of proximity, size and quality of public green space on its use across different socio-economic attributes and residential/job places and stated willingness-to-pay and substitution possibilities with private green space. [less ▲]

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See detailExtending the scale of critical housing studies: Towards ‘cross-border gentrification’?
Christmann, Nathalie UL

Scientific Conference (2017, April)

Drawing upon the case of a polycentric cross-border metropolitan region in western Europe, this paper seeks to explore population mobility and housing market developments at the regional/international ... [more ▼]

Drawing upon the case of a polycentric cross-border metropolitan region in western Europe, this paper seeks to explore population mobility and housing market developments at the regional/international scale. Transnational linkages within this cross-border region intensified with the opening of the borders and the economic development of the Grand Duchy of Luxembourg as a global financial centre and a centre for European Institutions. Today about 44 per cent of employees working in Luxembourg live nearby across the Belgian, French or German border. One of the reasons is that housing prices in Luxembourg are nearly twice those in the neighbouring border regions. This increased mobility has an impact on the residents living in these areas. The research that guides this paper aims to detect perceptions of this phenomenon. Therefore principles of municipal policy, urban planning documents and the local media of three medium sized towns in the borderland are reviewed. Following a rather open research concept based on qualitative approaches (discourse analysis, grounded theory), findings reveal that locational advantages such as the proximity to Luxembourg do play a role; the perception that affordable housing is becoming increasingly critical leads to resentments that mix up with national stereotypes; while city officials report displacement due to the border-effect, they also illustrate the opportunities for regional development; at the same time property developers foster the internationalisation of urban planning. Pointing to the relational geographies that link these different places, the paper discusses the pros and cons of an umbrella concept that might be called ‘cross-border gentrification’. [less ▲]

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See detailComptabiliser les crimes pour conceptualiser la violence? Le cas de la prévôté de Luxembourg (1525 et 1630)
Leuck, Jessica UL

Scientific Conference (2017, March 29)

L’historienne Laure Verdon caractérise « tout acte ou parole qui rompt le tissu social et porte atteinte à l’ordre » comme violence. De plus, le chercheur « doit s’interroger sur les formes qu’a pris la ... [more ▼]

L’historienne Laure Verdon caractérise « tout acte ou parole qui rompt le tissu social et porte atteinte à l’ordre » comme violence. De plus, le chercheur « doit s’interroger sur les formes qu’a pris la violence au fil des époques et sur le rapport que les hommes entretiennent avec elle » (Éloïse Adde, 2012). Parmi d’autres voies pour saisir cette variation historique et culturelle de la perception de la violence, nous proposons une analyse minutieuse des comptes des officiers de justice. Contrairement aux règlements, aux lois ou encore aux sources judiciaires qui expriment le fonctionnement théorique de la justice, ces comptes, de par leur caractère administratif, livrent une image réelle des crimes commis. Bien que le terme « violence » n’apparaisse jamais en tant que tel dans ces sources, les crimes et délits mentionnés dans les comptes sont considérés comme tels car ils représentent toujours une forme de violence contre le tissu social ou/et l’ordre établie. Leur présence dans ces sources et leur usage en justice permettent de projeter la conception de la violence pour une époque concrète en nous informant sur la perception quotidienne que les contemporains - surtout les justiciers - en avaient envers. En outre, la variété des cas permet de moduler cette compréhension et de proposer une lecture fine du phénomène. Conservés presque dans leur totalité pour la période de 1525 à 1630, les livres de comptes rédigés dans la prévôté de Luxembourg, une des plus grandes du duché, consistent une source primordiale pour entamer une telle recherche. [less ▲]

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See detailDigital Work and the Role of Online Platforms. The Need for an Indirect Approach
Ratti, Luca UL

Scientific Conference (2017, March 22)

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See detailReduced basis Nitsche-based domain decomposition: a biomedical application
Baroli, Davide UL; Beex, Lars UL; Hale, Jack UL et al

Scientific Conference (2017, March 10)

Nowadays, the personalized biomedical simulations demand real-time efficient and reliable method to alleviate the computational complexity of high-fidelity simulation. In such applications, the necessity ... [more ▼]

Nowadays, the personalized biomedical simulations demand real-time efficient and reliable method to alleviate the computational complexity of high-fidelity simulation. In such applications, the necessity of solving different substructure, e.g. tissues or organs, with different numbers of the degrees of freedom and of coupling the reduced order spaces for each substructure poses a challenge in the on-fly simulation. In this talk, this challenge is taken into account employing the Nitsche-based domain decomposition technique inside the reduced order model [1]. This technique with respect to other domain decomposition approach allows obtaining a solution with the same accuracy of underlying finite element formulation and to flexibly treat interface with non-matching mesh. The robustness of the coupling is determined by the penalty coefficients that is chosen using ghost penalty technique [2]. Furthermore, to reduce the computational complexity of the on-fly assembling it is employed the empirical interpolation approach proposed in [3]. The numerical tests, performed using FEniCS[4], petsc4py and slepc4py [5], shows the good performance of the method and the reduction of computation cost. [1] Baroli, D., Beex L. and Bordas, S. Reduced basis Nitsche-based domain decomposition. In preparation. [2] Burman, E., Claus, S., Hansbo, P., Larson, M. G., & Massing, A. (2015). CutFEM: Discretizing geometry and partial differential equations. International Journal for Numerical Methods in Engineering, 104(7), 472-501. [3] E. Schenone, E., Beex,L., Hale, J.S., Bordas S. Proper Orthogonal Decomposition with reduced integration method. Application to nonlinear problems. In preparation. [4] A. Logg, K.-A. Mardal, G. N. Wells et al. Automated Solution of Differential Equations by the Finite Element Method, Springer 2012. [5] L. Dalcin, P. Kler, R. Paz, and A. Cosimo, Parallel Distributed Computing using Python, Advances in Water Resources, 34(9):1124-1139, 2011. http://dx.doi.org/10.1016/j.advwatres.2011.04.013 [less ▲]

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See detailEconomic Law in the EU: How to Ensure More Convergence After the Brexit? Workshop on Corporate Law
Corbisier, Isabelle UL

Scientific Conference (2017, March 06)

See Programme at the start of the appended document for a description of the whole event, followed by the summary of Isabelle Corbisier's intervention (by herself)

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See detailStahlverbundkonstruktionen im Hochbau - Entwicklungen in der Normung
Schäfer, Markus UL

Scientific Conference (2017, March)

Die Eurocodes (EC) repräsentieren europäische Normen (EN) für die Bemessung und Konstruktion von Bauwerken im Hoch- und Brückenbau. Die Entwicklung dieser europäischen Regelwerke erfolgte im Auftrag der ... [more ▼]

Die Eurocodes (EC) repräsentieren europäische Normen (EN) für die Bemessung und Konstruktion von Bauwerken im Hoch- und Brückenbau. Die Entwicklung dieser europäischen Regelwerke erfolgte im Auftrag der Europäischen Union durch das „European Committee for Standardisation“ CEN. Seit einigen Jahren sind die Eurocodes bereits in der Anwendung. Basierend auf diesen Erfahrungen und vielfachen Kommentaren aus der Industrie erfolgt derzeit eine Überarbeitung aller Teile des Eurocodes mit dem Ziel, die aktuellen Bemessungsnormen an den Stand der Technik und Forschung anzupassen, die Anwendung zu vereinfachen sowie der Harmonisierung der Eurocodes untereinander. Abschließend werden diese Modifikationen in die zweite Generation der europäischen Normen überführt. In den folgenden Ausführungen wird die Arbeit des Projektteams SC4.T1 vorgestellt. Es wird ein Einblick in die bestehende Normungsarbeit und die fachlichen Diskussionen gegeben sowie auszugsweise die Entwürfe zu den anstehenden Änderungen der EN 1994-1-1 vorgestellt. [less ▲]

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See detailSocially assistive robots for teaching emotional abilities to children with autism spectrum disorder
Pinto Costa, Andreia UL; Steffgen, Georges UL; Rodriguez Lera, Francisco Javier UL et al

Scientific Conference (2017, March)

Socially assistive robots, when used in a way that takes into consideration children’s needs and developmental characteristics, can be useful tools to enable children’s development. More specifically, due ... [more ▼]

Socially assistive robots, when used in a way that takes into consideration children’s needs and developmental characteristics, can be useful tools to enable children’s development. More specifically, due to their characteristics (predictability, simplicity, and repetition) robots can be especially helpful to teach emotional abilities to children with autism spectrum disorder (ASD). Previous research has provided preliminary evidence that robots can help children improve in some domains such as joint attention and imitation. However, no studies have examined how robots can be integrated in intervention protocols targeting the acquisition of emotional abilities in children with ASD. This paper presents a work in progress on an emotional ability training developed for children with ASD using the QT socially assistive robot. This training aims to test whether children with ASD can benefit from a robot-mediated training to improve emotional ability. [less ▲]

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See detailThe social inclusion of students with physical disabilities
Pit-Ten Cate, Ineke UL; Stevenson, Jim

Scientific Conference (2017, March)

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See detailExploiting Transistor-Level Reconfiguration to Optimize Combinational Circu
Raitza, Michael; Kumar, Akash; Volp, Marcus UL et al

Scientific Conference (2017, March)

Silicon nanowire reconfigurable field effect transistors (SiNW RFETs) abolish the physical separation of n-type and p-type transistors by taking up both roles in a configurable way within a doping-free ... [more ▼]

Silicon nanowire reconfigurable field effect transistors (SiNW RFETs) abolish the physical separation of n-type and p-type transistors by taking up both roles in a configurable way within a doping-free technology. However, the potential of transistor-level reconfigurability has not been demonstrated in larger circuits, so far. In this paper, we present first steps to a new compact and efficient design of combinational circuits by employing transistor-level reconfiguration. We contribute new basic gates realized with silicon nanowires, such as 2/3-XOR and MUX gates. Exemplifying our approach with 4-bit, 8-bit and 16-bit conditional carry adders, we were able to reduce the number of transistors to almost one half. With our current case study we show that SiNW technology can reduce the required chip area by 16 %, despite larger size of the individual transistor, and improve circuit speed by 26 %. [less ▲]

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See detailDigitaler historischer Stadtatlas Luxemburgs (Villux10) - Projektvorstellung
Uhrmacher, Martin UL

Scientific Conference (2017, February 22)

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See detailNoise characteristics in Zenith Total Delay from homogeneously reprocessed GPS time series
Klos, Anna; Hunegnaw, Addisu UL; Teferle, Felix Norman UL et al

Scientific Conference (2017, February 22)

Zenith Total Delay (ZTD) time series, derived from the re-processing of Global Positioning System (GPS) data, provide valuable information for the evaluation of global atmospheric reanalysis products such ... [more ▼]

Zenith Total Delay (ZTD) time series, derived from the re-processing of Global Positioning System (GPS) data, provide valuable information for the evaluation of global atmospheric reanalysis products such as ERA-Interim. Identifying the correct noise characteristics in the ZTD time series is an important step to assess the ’true’ magnitude of ZTD trend uncertainties. The ZTD residual time series for 1995-2015 are generated from our homogeneously re-processed and homogenized GPS time series from over 700 globally distributed stations classified into five major climate zones. The annual peak of ZTD data ranges between 10 and 150 mm with the smallest values for the polar and Alpine zone. The amplitudes of daily curve fall between 0 and 12 mm with the greatest variations for the dry zone. The autoregressive process of fourth order plus white noise model were found to be optimal for ZTD series. The tropical zone has the largest amplitude of autoregressive noise (9.59 mm) and the greatest amplitudes of white noise (13.00 mm). All climate zones have similar median coefficients of AR(1) (0.80±0.05) with a minimum for polar and Alpine, which has the highest coefficients of AR(2) (0.27±0.01) and AR(3) (0.11±0.01) and clearly different from the other zones considered. We show that 53 of 120 examined trends became insignificant, when the optimum noise model was employed, compared to 11 insignificant trends for pure white noise. The uncertainty of the ZTD trends may be underestimated by a factor of 3 to 12 compared to the white noise only assumption. [less ▲]

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See detailAn Evaluaton of Real-Time Troposphere Products Based on mult-GNSS Precise Point Posi)oning
Ding, Wenwu; Teferle, Felix Norman UL; Kazmierski, Kamil et al

Scientific Conference (2017, February 21)

When employing observations from multiple Global Navigation Satellite System (GNSS) the performance of real-time (RT) GNSS meteorology can be improved. In this paper, we describe an operational RT system ... [more ▼]

When employing observations from multiple Global Navigation Satellite System (GNSS) the performance of real-time (RT) GNSS meteorology can be improved. In this paper, we describe an operational RT system for extracting zenith tropospheric delay (ZTD) using a modified version of the PPP-wizard. Multi-GNSS, including GPS, GLONASS and Galileo, observation streams are processed using a RT PPP strategy based on RT satellite orbit/clock products from CNES. A continuous experiment for 30 days is conducted, in which the RT observation streams of 20 globally distributed stations are processed. The initialization time and accuracy of the RT troposphere products using single/multi-system observations are evaluated. The effect of RT PPP ambiguity resolution is also evaluated. The results reveal that the RT troposphere products based on single system observations can fulfill the requirements of meteorological application, in which the GPS-only solution is better than the GLONASS-only solution in both initialization and accuracy. The performance can also be improved by applying RT PPP ambiguity resolution and utilizing multi-GNSS observations. Specifically, we notice that the ambiguity resolution is more effective in improving the accuracy, whereas the initialization process can be better accelerated by multi-GNSS observations. Combining all systems, RT troposphere products with an average accuracy of about 8 mm in ZTD can be achieved after an initialization process of approximately 9 minutes, which supports the application of multi-GNSS observations and ambiguity resolution for RT meteorological applications. [less ▲]

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See detailNew methodology for designing direct-laser-sintered motorcycle frame based on combination of topology optimization and lattice implementation
Cao, Thanh Binh UL; Kedziora, Slawomir UL

Scientific Conference (2017, February 07)

The use of direct laser sintering (DLS) has become more attractive recently since it offers a promising tool in fabricating complex components rapidly. Particularly, the technique is seen more powerful ... [more ▼]

The use of direct laser sintering (DLS) has become more attractive recently since it offers a promising tool in fabricating complex components rapidly. Particularly, the technique is seen more powerful when it is combined with computer-aid design and computational optimization. In spite of knowledge increment in the above areas presently, design method for sophisticated structures towards DLS is still far from being fully exploited. Therefore, this paper was issued to investigate a novel methodology of design, developed by combining topology optimization and lattice-beam implementation, for a blend-solid-lattice frame of a motorcycle. From the obtained results, it was recognized that the as-built tubular hybrid structure demonstrated comparable values of first resonant frequency and mass with respected to those of the original. Additionally, it was found that stiffness of the generated structures depended strongly on locations where lattice was substituted. In particular, less stressed frame’s components were evidenced as appropriate regions for the substitution. The achieved results also revealed estimated buckling load factors, being circa 17 times higher than applied bumping loads acted on the tubular-lattice structure. Finally, equivalent stress predicted in static analyses confirmed all designs working safely in nominated conditions. Based on these achievements, it is believed that the new method worked quite acceptably in designing direct-laser-sintered motorcycle frame, and it is very promising to further develop the method as well as extend it into different complex direct-laser-sintered elements designed for future applications. [less ▲]

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See detailCanonically defined star products for Kaehler manifolds
Schlichenmaier, Martin UL

Scientific Conference (2017, February 07)

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See detailTeacher-Student Relationship and Its Impact on Students' Desire for Knowledge
Voynova, Ruzhena UL; Weber, Jean-Marie UL

Scientific Conference (2017, February)

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See detailInherently Unneutral Investment Treaty Arbitration and Never-Ending Excuses
Radović, Relja UL

Scientific Conference (2017, February)

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See detailMultiphysics applications and computational challenges
Zilian, Andreas UL

Scientific Conference (2017, January 24)

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See detailIntergenerational differences in social and political participation in Western Europe
Meyers, Christiane UL

Scientific Conference (2017, January 17)

The global crisis and its negative consequences on living conditions in Europe have led in some countries to massive protests, especially among young persons. Kern et al. (2015) argue that this rising and ... [more ▼]

The global crisis and its negative consequences on living conditions in Europe have led in some countries to massive protests, especially among young persons. Kern et al. (2015) argue that this rising and sudden political engagement can be explained by grievance theory: individuals whose interests are threatened react by engaging themselves politically. However, they also demonstrate that political participation in a more long-term perspective is better explained by the civic voluntarism model. Brady et al. (1995) establish that resources like time, money and civic skills are central for getting politically active. Persons with a low socioeconomic status who possess fewer resources are generally less political active. In a long-term perspective the economic crisis and the deterioration of living conditions should lead to less political participation of young people. I want to use the civic voluntarism model to analyse and describe the changing political participation forms of different generations. Generations are defined as persons having experienced similar historical conditions when growing up, thus developing similar values and beliefs (Grasso, 2014). I will look at the generation of the baby boomers born after World War II and compare them to the generation Y born before the turn of the millennium. Both generations grew up in times of social changes and challenges. I will use a broad definition of participation, which integrates political and social engagement, to look at the different participation modes of the generations (Meyers & Willems, 2016; Sloam, 2014; Dalton, 2008). The analysis is based on data of the European Values Study and uses multivariate methods (factor and cluster analysis) to determine different engagement types within the two generations in Western Europe. Are there signs that the young generation disengages from society? Do they engage themselves in other ways than the older generation? How can the civic voluntarism model help to explain the differences between older and younger generations? [less ▲]

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See detailChez nous, les fraises ne poussent pas en hiver. Le rôle de la locavoracité dans la (re)prise de conscience de la saisonnalité des aliments
Reckinger, Rachel UL

Scientific Conference (2017, January 11)

Basé sur deux études empiriques, conjointement quantitatives et qualitatives, menées dans le contexte de deux projets interdisciplinaires à l’Université du Luxembourg, l’argumentaire porte sur l’interface ... [more ▼]

Basé sur deux études empiriques, conjointement quantitatives et qualitatives, menées dans le contexte de deux projets interdisciplinaires à l’Université du Luxembourg, l’argumentaire porte sur l’interface régionalité / saisonnalité tant au Grand-Duché que dans les régions limitrophes. En effet, dans les populations considérées, la régionalité comme qualification alimentaire prime largement sur la saisonnalité, qui, elle, demande une réflexivité et une conscience agricole plus importante. Mais la forme locavore de la notion de régionalité est actuellement une tendance montante et elle favorise, justement, une (re)prise de conscience des contextes géolocalisés de la production alimentaire. Sa diffusion pourrait avoir un impact positif sur la saisonnalité tant dans les représentations que dans les pratiques des consommateurs – en tant que facteur de réduction d’émissions liées au transport, de potentiel d’identification communautaire et de valorisation locale, ainsi que de lutte contre le gaspillage alimentaire. [less ▲]

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See detailAsset Pricing under Rational Learning about Rare Disasters
Koulovatianos, Christos UL; Wieland, Volker

Scientific Conference (2017, January 07)

Why is investment in stocks so persistently weak after a rare disaster? Connecting disaster episodes with post-disaster expectations seems crucial for such post-disaster forecasting and also policymaking ... [more ▼]

Why is investment in stocks so persistently weak after a rare disaster? Connecting disaster episodes with post-disaster expectations seems crucial for such post-disaster forecasting and also policymaking, but rational-expectations models with variable disaster risk often fail to achieve this connection. To this end, while retaining full rationality, we introduce limited information and learning about rare-disaster risk and show that the resulting stock-investment behavior seems similar to persistent investor fear after a rare disaster. We study, (a) rational learning for state verification (RLS), with investors knowing the data-generating process of disaster riskiness but being unable to observe whether the economy is in a riskier state (regime) or not, and (b) rational learning about the data-generating process (RLP) of disaster risk, with investors also being unaware of the data-generating process of disaster riskiness. We analytically show that both RLS and RLP synchronize disaster events with post-disaster expectations and asset prices, and create persistence in price-dividend ratios even if data-generating processes of disaster risk have no persistence. Using De Finetti's theorem we show that RLP offers an explanation for global spells of pessimism and weak investment after a disaster. [less ▲]

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See detailData Abundance and Asset Price Informativeness
Dugast, Jérôme UL; Foucault, Thierry

Scientific Conference (2017, January 06)

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See detailN-point Virasoro algebras are multi-point Krichever-Novikov type algebras
Schlichenmaier, Martin UL

Scientific Conference (2016, December 14)

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See detailGlobal converegence properties of a consensus protocol on the n-sphere
Markdahl, Johan UL; Goncalves, Jorge UL

Scientific Conference (2016, December 13)

This paper provides a novel analysis of the global convergence properties of a well-known consensus protocol for multi-agent systems that evolve in continuous time on the n-sphere. The feedback is ... [more ▼]

This paper provides a novel analysis of the global convergence properties of a well-known consensus protocol for multi-agent systems that evolve in continuous time on the n-sphere. The feedback is intrinsic to the n-sphere, i.e., it does not rely on the use of local coordinates obtained through a parametrization. It is shown that, for any connected undirected graph topology and all n>1, the consensus protocol yields convergence that is akin to almost global consensus in a weak sense. Simulation results suggest that actual almost global consensus holds. This result is of interest in the context of consensus on Riemannian manifolds since it differs from what is known with regard to the 1-sphere and SO(3) where more advanced intrinsic consensus protocols are required in order to generate equivalent results. [less ▲]

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See detailL'enseignement transsystémique du droit des contrats: l'expérience luxembourgeoise
Ancel, Pascal UL

Scientific Conference (2016, December 13)

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See detailAvoiding Leakage and Synchronization Attacks through Enclave-Side Preemption Control
Volp, Marcus UL; Lackorzynski, Adam; Decouchant, Jérémie UL et al

Scientific Conference (2016, December 12)

Intel SGX is the latest processor architecture promising secure code execution despite large, complex and hence potentially vulnerable legacy operating systems (OSs). However, two recent works identified ... [more ▼]

Intel SGX is the latest processor architecture promising secure code execution despite large, complex and hence potentially vulnerable legacy operating systems (OSs). However, two recent works identified vulnerabilities that allow an untrusted management OS to extract secret information from Intel SGX's enclaves, and to violate their integrity by exploiting concurrency bugs. In this work, we re-investigate delayed preemption (DP) in the context of Intel SGX. DP is a mechanism originally proposed for L4-family microkernels as disable-interrupt replacement. Recapitulating earlier results on language-based information-flow security, we illustrate the construction of leakage-free code for enclaves. However, as long as adversaries have fine-grained control over preemption timing, these solutions are impractical from a performance/complexity perspective. To overcome this, we resort to delayed preemption, and sketch a software implementation for hypervisors providing enclaves as well as a hardware extension for systems like SGX. Finally, we illustrate how static analyses for SGX may be extended to check confidentiality of preemption-delaying programs. [less ▲]

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See detailN-point Virasoro algebras are multi-point Krichever-Novikov type algebras
Schlichenmaier, Martin UL

Scientific Conference (2016, December 12)

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See detailDeep Learning on Big Data Sets in the Cloud with Apache Spark and Google TensorFlow
Glauner, Patrick UL; State, Radu UL

Scientific Conference (2016, December 09)

Machine learning is the branch of artificial intelligence giving computers the ability to learn patterns from data without being explicitly programmed. Deep Learning is a set of cutting-edge machine ... [more ▼]

Machine learning is the branch of artificial intelligence giving computers the ability to learn patterns from data without being explicitly programmed. Deep Learning is a set of cutting-edge machine learning algorithms that are inspired by how the human brain works. It allows to selflearn feature hierarchies from the data rather than modeling hand-crafted features. It has proven to significantly improve performance in challenging data analytics problems. In this tutorial, we will first provide an introduction to the theoretical foundations of neural networks and Deep Learning. Second, we will demonstrate how to use Deep Learning in a cloud using a distributed environment for Big Data analytics. This combines Apache Spark and TensorFlow, Google’s in-house Deep Learning platform made for Big Data machine learning applications. Practical demonstrations will include character recognition and time series forecasting in Big Data sets. Attendees will be provided with code snippets that they can easily amend in order to analyze their own data. A related, but shorter tutorial focusing on Deep Learning on a single computer was given at the Data Science Luxembourg Meetup in April 2016. It was attended by 70 people making it the most attended event of this Meetup series in Luxembourg ever since its beginning. [less ▲]

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See detailAufbauen auf den mehrsprachigen Ressourcen der Kinder,
Kirsch, Claudine UL

Scientific Conference (2016, December 07)

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See detailA tracking error control approach for model predictive position control of a quadrotor with time varying reference
Dentler, Jan Eric UL; Kannan, Somasundar UL; Olivares Mendez, Miguel Angel UL et al

Scientific Conference (2016, December 06)

In mobile robotic applications, a common problem is the following of a given trajectory with a constant velocity. Using standard model predictive control (MPC) for tracking of time varying trajectories ... [more ▼]

In mobile robotic applications, a common problem is the following of a given trajectory with a constant velocity. Using standard model predictive control (MPC) for tracking of time varying trajectories leads to a constant tracking error. This problem is modelled in this paper as quadrotor position tracking problem. The presented solution is a computationally light-weight target position control (T PC), that controls the tracking error of MPCs for constantly moving targets. The proposed technique is assessed mathematically in the Laplace domain, in simulation, as well as experimentally on a real quadrotor system. [less ▲]

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See detailBubbles and Trading Frenzies: Evidence from the Art Market
Penasse, Julien UL

Scientific Conference (2016, December)

Detailed reference viewed: 9 (1 UL)
See detailValuing American options using fast recursive projections
Cosma, Antonio UL; Galluccio, Stefano; Pederzoli, Paola et al

Scientific Conference (2016, December)

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See detailTowards Characterizing Bluetooth Discovery in a Vehicular Context
Bronzi, Walter UL; Derrmann, Thierry UL; Castignani, German UL et al

Scientific Conference (2016, December)

Bluetooth has, in recent years, gained more and more momentum. New commodity objects and wearables im- plementing Bluetooth Smart technology (Low Energy) are re- leased everyday. In particular, the ever ... [more ▼]

Bluetooth has, in recent years, gained more and more momentum. New commodity objects and wearables im- plementing Bluetooth Smart technology (Low Energy) are re- leased everyday. In particular, the ever increasing number of discoverable devices both inside and outside a populated area gives us an encouraging insight on future research directions for this technology. In this paper, based on a sensing system developed as an Android application, we evaluate Bluetooth Classic and Low Energy discovery characteristics from a vehic- ular perspective. By recording information about devices nearby (e.g. the number of discovered devices, their signal strength, manufacturer information) and the GPS location we can derive interesting information about a driver’s situation, as well as his/her environment. Presented results indicate that the amount of discovered devices and signal strengths are dependent on velocity and road category. Finally, future work and discussions address potential use-case applications based only on Bluetooth discovery, such as low energy and privacy friendly road and traffic context awareness. The sensing system used in this article is free online under the MIT License. [less ▲]

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See detailRaising the Achievement of all Learners in Inclusive Education Project: Rosmini and Sereni
Limbach-Reich, Arthur UL

Scientific Conference (2016, December)

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See detailL'exrcice du droit de retrait au regard des droits constitutionnels britannique et européen
Gerkrath, Jörg UL

Scientific Conference (2016, November 25)

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See detailMetadiscourse in lectures: the case of importance marking
Deroey, Katrien UL

Scientific Conference (2016, November 19)

This paper surveys how relative importance is marked lexicogrammatically in lectures (cf. Deroey and Taverniers, 2012; Deroey, 2014; Deroey, 2015). Markers of (lesser) importance (e.g. the point is ... [more ▼]

This paper surveys how relative importance is marked lexicogrammatically in lectures (cf. Deroey and Taverniers, 2012; Deroey, 2014; Deroey, 2015). Markers of (lesser) importance (e.g. the point is, remember, anyway, briefly) are metadiscursive devices combining discourse organization with evaluation along a ‘parameter of importance or relevance’ (Thompson and Hunston, 2000: 24). Such marking can benefit lecture comprehension, note-taking and retention. Using corpus-driven and corpus-based methods, 40 lectures from the British Academic Spoken English (BASE) corpus were first manually examined to identify candidate markers. Further instances of these and related markers were then retrieved from the whole corpus of 160 lectures using Corpus Query Language in Sketch Engine. A wide variety of markers were thus attested, the predominant ones of which are not the ones we would intuitively think of. Markers of important information were classified into lexicogrammatical patterns depending on the word class of their main lexeme. The multifunctional, semi-fixed expressions ‘the point is’ and ‘remember’ predominate over more stereotypical, explicit markers such as ‘the important point is’. Markers of lesser importance were classified according to how they achieved their effect. Most denote partial relevance (e.g. detail, in passing, briefly) rather than irrelevance (e.g. not pertinent, not matter, trash) and some markers appear pragmaticalized in certain contexts. As many markers required significant interpretation to achieve their importance marking effect, an understanding of the lecture genre as well as co-textual, visual, non-verbal and prosodic clues seem particularly important in identifying their precise status. This poses a challenge to quantification. Indeed, Hunston’s observation that ‘much evaluative meaning is not obviously identifiable, as it appears to depend on immediate context and on reader assumptions about value’ (2004: 157) is particularly pertinent here. Deroey, K. L. B., & Taverniers, M. (2012). ‘Ignore that'cause it's totally irrelevant’: marking lesser relevance in lectures. Journal of Pragmatics, 44(14), 2085-2099. Deroey, K. L. B. (2014). ‘Anyway, the point I'm making is’: Lexicogrammatical relevance marking in lectures. In L. Vandelanotte, D. Kristin, G. Caroline, & K. Ditte (Eds.), Recent advances in corpus linguistics: developing and exploiting corpora (pp. 265-291). Amsterdam: Rodopi. Deroey, K. L. B. (2015). Marking importance in lectures: interactive and textual orientation. Applied Linguistics, 36(1), 51-72. Thompson, G., & Hunston, S. (2000). Evaluation: An introduction. In Hunston, S., & Thompson, G. (Eds.), Evaluation in text: authorial stance and the construction of discourse (pp. 1-27). Oxford: OUP. [less ▲]

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See detailMagnetic neutron scattering studies on Nd-Fe-B magnets
Michels, Andreas UL

Scientific Conference (2016, November 17)

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See detailAn approach to information retrieval and question answering in the legal domain
Adebayo, Kolawole John UL; Di Caro, Luigi; Boella, Guido et al

Scientific Conference (2016, November 15)

We describe in this paper, a report of our participation at COLIEE 2016 Information Retrieval (IR) and Legal Question Answering (LQA) tasks. Our solution for the IR part employs the use of a simple but ... [more ▼]

We describe in this paper, a report of our participation at COLIEE 2016 Information Retrieval (IR) and Legal Question Answering (LQA) tasks. Our solution for the IR part employs the use of a simple but effective Machine Learning (ML) procedure. Our Question Answering solution answers "YES or 'NO' to a question, i.e., 'YES' if the question is entailed by a text and 'NO' otherwise. With recent exploit of Multi-layered Neural Network systems at language modeling tasks, we presented a Deep Learning approach which uses an adaptive variant of the Long-Short Term Memory (LSTM), i.e. the Child Sum Tree LSTM (CST-LSTM) algorithm that we modified to suit our purpose. Additionally, we benchmarked this approach by handcrafting features for two popular ML algorithms, i.e., the Support Vector Machine (SVM) and the Random Forest (RF) algorithms. Even though we used some features that have performed well from similar works, we also introduced some semantic features for performance improvement. We used the results from these two algorithms as the baseline for our CST-LSTM algorithm. All evaluation was done on the COLIEE 2015 training and test sets. The overall result conforms the competitiveness of our approach. [less ▲]

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See detailThe Orchestration Stack: The Impossible Task of Designing Software for Unknown Future Post-CMOS Hardware
Volp, Marcus UL; Klüppelholz, Sascha; Castrillon, Jeronimo et al

Scientific Conference (2016, November 14)

Future systems based on post-CMOS technologies will be wildly heterogeneous, with properties largely unknown today. This paper presents our design of a new hardware/software stack to address the challenge ... [more ▼]

Future systems based on post-CMOS technologies will be wildly heterogeneous, with properties largely unknown today. This paper presents our design of a new hardware/software stack to address the challenge of preparing software development for such systems. It combines well-understood technologies from different areas, e.g., network-on-chips, capability operating systems, flexible programming models and model checking. We describe our approach and provide details on key technologies. [less ▲]

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See detailDemo Abstract: Human Mobility Profiling Using Privacy-Friendly Wi-Fi and Activity Traces
Faye, Sébastien UL; Tahirou, Ibrahim UL; Engel, Thomas UL

Scientific Conference (2016, November 14)

Human mobility is one of the key topics to be considered in the networks of the future, both by industrial and research communities that are already focused on multidisciplinary applications and user ... [more ▼]

Human mobility is one of the key topics to be considered in the networks of the future, both by industrial and research communities that are already focused on multidisciplinary applications and user-centric systems. If the rapid proliferation of networks and high-tech miniature sensors makes this reality possible, the ever-growing complexity of the metrics and parameters governing such systems raises serious issues in terms of privacy, security and computing capability. In this demonstration, we show a new system, able to estimate a user's mobility profile based on anonymized and lightweight smartphone data. In particular, this system is composed of (1) a web analytics platform, able to analyze multimodal sensing traces and improve our understanding of complex mobility patterns, and (2) a smartphone application, able to show a user's profile generated locally in the form of a spider graph. In particular, this application uses anonymized and privacy-friendly data and methods, obtained thanks to the combination of Wi-Fi traces, activity detection and graph theory, made available independent of any personal information. [less ▲]

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See detailZoltán Kodály, Marcel Landowsky und Leo Kestenberg. Musikalische Bildung und ihre Reformer
Sagrillo, Damien UL

Scientific Conference (2016, November 11)

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See detailMusikalische Bildung - (drei) europäische Taditionen im Überblick
Sagrillo, Damien UL

Scientific Conference (2016, November 10)

I will present the two personalities of Leo Kestenberg and Marcel Landowski; I will describe their life-work and relate it to Zoltán Kodály, the eminent Hungarian composer, ethnomusicologist and music ... [more ▼]

I will present the two personalities of Leo Kestenberg and Marcel Landowski; I will describe their life-work and relate it to Zoltán Kodály, the eminent Hungarian composer, ethnomusicologist and music pedagogue. However, the study will be based on Marcel Landowski, because, until now, no German documents are dealing with his life and achievements. Although acknowledged in their countries as musicians and of music organisers, Kestenberg and Landowski are not known in the respective other country. On the other hand, Zoltán Kodály is recognised worldwide. It is for this reason that a comparative study is necessary. Nevertheless, this paper cannot be complete but should be a motivation for further research about the organisation of music education, the organisation of music including the political background in the countries presented in this document or the larger context of European nations. [less ▲]

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See detailStudying Scarring Effects Using Factorial Designs: Rating or Ranking?
Imdorf, Christian; Sacchi, Stefan; Samuel, Robin UL et al

Scientific Conference (2016, November 09)

Early job insecurity is a much-discussed topic across European countries. Research overwhelmingly found that being unemployed after graduation affects employment chances and also future wages negatively ... [more ▼]

Early job insecurity is a much-discussed topic across European countries. Research overwhelmingly found that being unemployed after graduation affects employment chances and also future wages negatively, other research, however, did not find such scarring effects. Some of this mixed evidence may be due to the different ways in which data were collected. Evaluating the effects of potentially stigmatizing applicant characteristics on hiring chances, such as previous unemployment spells, is known to be prone to social desirability bias. Factorial survey experiments (FSE) and forced choice experiments (FCE) have been suggested to alleviate some of these problems. In this workshop contribution, we gauge the capability of FSE and FCE to estimate effects of early career unemployment spells on recruiters’ hiring decisions. Using data obtained from a survey with sequentially implemented FSE and FCE with 2000 recruiters in Bulgaria, Greece, Norway, and Switzerland we compare FSE and FCE using multilevel linear regression models and multilevel probit models with random effects. Our preliminary results suggest that FCE may be better suited to gather valid data with minimal social desirability bias. [less ▲]

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See detailCross-border regional policy cooperation as cross-border practice formation: a topic outline
Wille, Christian UL

Scientific Conference (2016, November 09)

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See detailSocial and Economic Inclusion
Limbach-Reich, Arthur UL; Nonthasoot, Seree

Scientific Conference (2016, November 09)

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See detailResearch on ‘Youth in Action’ projects in Luxembourg: the variety of learning effects on participants
Meyers, Christiane UL

Scientific Conference (2016, November 08)

The European Union promotes young people's mobility since a lot of years by specific programmes. In the area of non-formal activities, the Youth in Action programme supports individual mobility activities ... [more ▼]

The European Union promotes young people's mobility since a lot of years by specific programmes. In the area of non-formal activities, the Youth in Action programme supports individual mobility activities as well as group mobility of young persons and youth workers. Although the programme is very successful, there existed not much knowledge about the effects of the projects on participants and project leaders. Therefore, in 2008 a small group of countries founded the RAY network - 'Research-based analysis and monitoring of Youth in action' – which has expanded since then and comprises today 31 countries. Its goal is to permanently gather and analyse data on the processes and outcomes of the YiA programme and its successor programme. Luxembourg joined the RAY network in 2010 and participated from 2011 to 2014 in 6 surveys in the framework of the YiA programme. During this time about 589 project participants and 252 project leaders answered the online questionnaires, which were sent to them some time after the end of the activity. In addition to the quantitative survey, a qualitative study on the effects of non-formal learning in the projects was realised in 2012/2013. In my presentation I want to show some of the results found in Luxembourg. Among other things, I will present a factor analysis on the competences, skills and attitudes developed by the participants and show how different project types can influence these effects. [less ▲]

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See detailCrossing the borders of domains. The role of complex problem solving for student learning
Scherer, Ronny; Greiff, Samuel UL

Scientific Conference (2016, November 08)

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See detailStrongly barycentrically associative and preassociative functions
Teheux, Bruno UL; Marichal, Jean-Luc UL

Scientific Conference (2016, November 08)

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See detailA real-time holding decision rule accounting for passenger travel cost
Laskaris, Georgios UL; Cats, Oded; Jenelius, Erik et al

Scientific Conference (2016, November 04)

Holding has been extensively investigated as a strategy to mitigate the inherently stochastic nature of public transport operations. Holding focuses on either regulating vehicle headways using a rule ... [more ▼]

Holding has been extensively investigated as a strategy to mitigate the inherently stochastic nature of public transport operations. Holding focuses on either regulating vehicle headways using a rule-based approach or minimizing passenger travel cost by employing optimization models. This paper introduces a holding decision rule that explicitly addresses passenger travel cost. The decision to hold relies on the passenger demand distribution along the line. The passenger cost holding rule is tested using simulation for a high frequency bus line in Stockholm, Sweden and is compared with a nocontrol scheme and the currently used headway-based strategy. The results indicate that the new decision rule results in relatively minor reductions of passenger cost compared to the currently adopted strategy, and that it allocates the greatest share of holding time at the beginning of the route. [less ▲]

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See detailComputing linear rankings from trillions of pairwise outranking situations
Bisdorff, Raymond UL

Scientific Conference (2016, November)

We present in this paper a sparse HPC implementation for outranking digraphs of huge orders, up to several millions of decision alternatives. The proposed outranking digraph model is based on a quantiles ... [more ▼]

We present in this paper a sparse HPC implementation for outranking digraphs of huge orders, up to several millions of decision alternatives. The proposed outranking digraph model is based on a quantiles equivalence class decomposition of the underlying multicriteria performance tableau. When locally ranking each of these ordered components, we may readily obtain an overall linear ranking of big sets of decision alternatives. For the local rankings, both, Copeland's as well as the Net-Flows ranking rules, appear to give the best compromise between, on the one side, the fitness of the overall ranking with respect to the given global outranking relation and, on the other side, computational tractability for very big outranking digraphs modelling up to several trillions of pairwise outranking situations. [less ▲]

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See detailAutoévaluation des élèves de l'école primaire en mathématiques
Villanyi, Denise UL; Fischbach, Antoine UL; Sonnleitner, Philipp UL et al

Scientific Conference (2016, November)

Detailed reference viewed: 55 (14 UL)
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See detailLanguage ideologies of preschool teachers and translanguaging practices in classrooms.
Kirsch, Claudine UL; Bes Izuel, Maria Asuncion UL

Scientific Conference (2016, November)

Translanguaging has been described as a natural practice amongst multilinguals although it remains uncommon in formal and informal educational institutions (Creese & Blackledge 2010). By contrast, Kirsch ... [more ▼]

Translanguaging has been described as a natural practice amongst multilinguals although it remains uncommon in formal and informal educational institutions (Creese & Blackledge 2010). By contrast, Kirsch (forthcoming) has shown that preschool children in trilingual Luxembourg translanguaged frequently during collaborative storytelling on iTEO, an iPad app which allows for the recording and editing of oral language. The 4-year-old emergent multilinguals studied here drew on their entire semiotic repertoire in order to communicate and to make meaning. They used Luxembourgish, their family language and features of other languages picked up from their peers. In order to understand these translanguaging practices, we consider it necessary to examine the underlying pedagogies which are, in turn, influenced by the language ideologies of the teachers (Gkaintartzi & Tsokalidou 2010). The present paper examines the language ideologies of two preschool teachers in Luxembourg and relates them to the translanguaging practices in their classrooms. The data stem from the qualitative, small-scale, longitudinal study iTEO (2013 – 2017) which used a mix-method approach comprising video and audio recordings, interviews, questionnaires and the collection of documents (e.g. written stories, pictures). The data show that the teachers understand language learning as a dynamic social process and have positive attitudes to multilingualism. They embrace language and cultural diversity in their classroom, promote translanguaging, and actively collaborate with parents in order to communicate and share their language practices. [less ▲]

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See detailViolence féminine dans la prévôté de Luxembourg entre 1520 et 1630
Leuck, Jessica UL

Scientific Conference (2016, October 21)

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See detailForced Answering in Online Surveys: Is it really a reactance effect that reduces data quality?
Sischka, Philipp UL; Mergener, Alexandra; Neufang, Kristina Marliese et al

Scientific Conference (2016, October 14)

Online surveys are conducted without adequate attention to implementation details too often. One example is the frequent use of the forced answering (FA) option, which forces the respondent to answer ... [more ▼]

Online surveys are conducted without adequate attention to implementation details too often. One example is the frequent use of the forced answering (FA) option, which forces the respondent to answer questions in order to proceed through the questionnaire. Currently, only a few studies have researched the impact of FA on different quality parameters. Some studies that evaluated the influence of FA on quality parameters (e.g. drop-out or answer quality) hypothesized that FA leads to reactance in the participants indicated by a higher drop-out-rate as well as lower answer quality. However, no study researched the psychological mechanism behind the correlation of FA on dropout and data quality before. Psychological Reactance Theory predicts that reactance appears when an individual’s freedom is threatened and cannot be directly restored. Reactance describes the motivation to restore this loss of freedom. Respondents could experience FA as a loss of freedom, as (s)he is denied the choice to leave a question unanswered. According to Reactance Theory possible reactions in this situation might be to quit survey participation or to fake answers. This study examines the psychological mechanism that explains higher amounts of dropout and faking behavior in FA condition (compared to non-FA- condition). Our major hypothesis is that forcing respondents to answer will cause reactance, which turns into increasing dropout rates and decreasing answer quality. We used split-ballot-field-experiments with a forced and non-forced answering instruction. Reactance was measured with a four-item reactance scale. To determine answer quality, we used self-report for faking. Our Mediation analysis shows that respondents in FA condition report higher amounts of reactance compared to respondents in non-FA condition. In addition to that reactance also is a strong predictor for dropout behavior, faking, or re-participation. Therefore, the influence of FA on quality parameters is mediated through reactance. [less ▲]

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See detailEinblicke in die Sprachideologien und Praktiken von Fachkräften in formalen und non-formalen Einrichtungen in Luxemburg
Kirsch, Claudine UL; Andersen, Katja Natalie UL; Mortini, Simone UL et al

Scientific Conference (2016, October 13)

Programme zur Förderung von alltagsintegrierter Mehrsprachigkeit in Kindertagesbetreuungen und Vorschulen sind selten. Das seit Mai 2016 laufende Forschungsprojekt MuLiPEC fokussiert die Entwicklung ... [more ▼]

Programme zur Förderung von alltagsintegrierter Mehrsprachigkeit in Kindertagesbetreuungen und Vorschulen sind selten. Das seit Mai 2016 laufende Forschungsprojekt MuLiPEC fokussiert die Entwicklung multilingualer Sprachpraktiken von Kindern im Alter von drei bis sechs Jahren sowie die zugrunde liegende Pädagogik im formalen und non-formalen Sektor der frühkindlichen Bildung. Für unsere Forschung ist von besonderem Interesse, die Beziehung zwischen den Sprachideologien der Erzieher/innen und Lehrer/innen und deren pädagogischen Handeln zu hinterfragen und die Reflexion über die Sprachpraktiken im Rahmen einer Weiterbildung und Forschungstreffen zu explizieren. Die Studie widmet sich der Analyse der Ideologien und Praktiken sowie der Effizienz unserer Weiterbildung zur Entwicklung einer mehrsprachigen Pädagogik. Im Vortrag werden der Aufbau des Forschungsprojektes mitsamt der besonderen Sprachensituation in Luxemburg sowie der dem Projekt zugrunde liegenden Weiterbildung vorgestellt und erste Einblicke in Sprachideologien der Fachkräfte gegeben. [less ▲]

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See detail• Climat scolaire : l’expérience des « grands et des grandes » de l’école élémentaire. Filles et garçons donnent leur point de vue sur la violence et son contraire.
Kerivel, Aude UL

Scientific Conference (2016, October 12)

Parce que la question de la violence ne peut s’étudier en dehors de l’organisation dans laquelle elle se déroule les recherches sur la violence à l’école ont progressivement élargie leur objet au climat ... [more ▼]

Parce que la question de la violence ne peut s’étudier en dehors de l’organisation dans laquelle elle se déroule les recherches sur la violence à l’école ont progressivement élargie leur objet au climat scolaire. Une manière de ne pas se focaliser sur les évènements exceptionnels mais de considérer la dimension subjective de la violence du point de vue des auteurs, victimes et témoins des situations. L’objet de notre recherche était de recueillir l’expérience des élèves, afin de reconstruire les formes, les causes, les effets et conséquence des situations de violence. Comment les élèves de CM1 et de CM2, « les grands et grandes » de l’école élémentaire -comme ils se nomment- décrivent-il ce qu’ils perçoivent comme violent ? Comment agissent-ils/elles en réponse à cette violence ? Qu’est ce qui permet aux élèves de se sentir en sécurité ensemble à l’école ? Telles sont les questions que nous nous sommes posées. Menée entre 2012 et 2014 dans 22 écoles en réseau éducation prioritaire notre enquête a croisé le regard des enseignants, parents et élèves. Mais nous nous centrerons dans cette présentation au résultat auprès des élèves qui sur la question du genre est venu contredire les représentations des enseignants. Au total ce sont les expérience de près de 500 élèves que nous avons recueillis par le biais d’entretien collectif et surtout d’un questionnaire ludique construit à partir de dessins. Un outil construit dans un va-et-vient entre terrain et théorie propre emprunté à la grounded theorie (Glaser and Strauss). Cette méthode a permis de ne pas utiliser les catégories trop souvent imposé par les enseignants lorsqu’il est question de violence à l’école. Contrairement aux propos des enseignants, la violence n’est pas qu’une affaire de garçons. Les élèves parlent de bagarres et de leurs éventuelles possibilités de résolution, de la souffrance causée par l’exclusion et de l’impuissance face aux cas de harcèlements. Si les expériences de la violence ne sont pas tout à fait les mêmes pour les filles et les garçons dans la classe, le couloir, la cours de récréations ou le terrain de sport. Filles et garçons se rejoignent lorsqu’ils parlent d’amitié, de la relation à l’enseignant, des régulations, des espaces et des rites. Car parler de la violence conduit aussi a interroger son contraire. [less ▲]

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See detailLoad Forecasting with Artificial Intelligence on Big Data
Glauner, Patrick UL; State, Radu UL

Scientific Conference (2016, October 09)

In the domain of electrical power grids, there is a particular interest in time series analysis using artificial intelligence. Machine learning is the branch of artificial intelligence giving computers ... [more ▼]

In the domain of electrical power grids, there is a particular interest in time series analysis using artificial intelligence. Machine learning is the branch of artificial intelligence giving computers the ability to learn patterns from data without being explicitly programmed. Deep Learning is a set of cutting-edge machine learning algorithms that are inspired by how the human brain works. It allows to self-learn feature hierarchies from the data rather than modeling hand-crafted features. It has proven to significantly improve performance in challenging signal processing problems. In this tutorial, we will first provide an introduction to the theoretical foundations of neural networks and Deep Learning. Second, we will demonstrate how to use Deep Learning for load forecasting with TensorFlow, Google’s in-house Deep Learning platform made for Big Data machine learning applications. The advantage of Deep Learning is that the results can easily be applied to other problems, such as detection of nontechnical losses. Attendees will be provided with code snippets that they can easily amend in order to perform analyses on their own time series. [less ▲]

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See detailCross-border activity-travel patterns: the Luxembourg residents perspective
Sprumont, François UL; Piroth, Isabelle UL; Viti, Francesco UL

Scientific Conference (2016, October 07)

Despite its small size (2586 km2), the Grand-duchy of Luxembourg is a strong economic locomotive. Indeed, among the 380 000 available jobs in the country, 44% are occupied by cross-border workers from ... [more ▼]

Despite its small size (2586 km2), the Grand-duchy of Luxembourg is a strong economic locomotive. Indeed, among the 380 000 available jobs in the country, 44% are occupied by cross-border workers from France, Belgium and Germany. While the commuting behavior and the activity chains of the cross-border workers have been largely studied (Carpentier, 2012, Drevon et al., 2013, Gerber, 2012) this is not the case for the population living in Luxembourg. This scientific contribution aims at analyzing the daily activity chains of resident population. Do residents perform all their activities in Luxembourg? If not, in which country do they go and for which type of activity? Due to the small size of the country and plausible attraction for surrounding countries (linked to familial reasons, nationality, past residential place of residence, differentials in prices etc.) the people living in Luxembourg might conduct some activities in Belgium, France or Germany. Between June and July 2015, a multi-day survey has been implemented on 52 staff members of the University of Luxembourg working, at that time, at Walferdange campus. These individuals provided information regarding their daily activities (activity duration and location, activity type) and their travel behavior (travelling time and mode) for two weeks. Among the respondents, 35 participants are living in Luxembourg and provided information for 490 days and 1850 activities in total. The studied population is interesting in many aspects. First of all, the individuals were working in Walferdange, a city located 8 km north of Luxembourg-city, so a central geographic position. Second, this is a high-qualified and international population. Actually, the education level of the respondents is high (45% have a PhD degree, 37% a master degree) and many of them moved to Luxembourg because of the attractive labour market. Third, the income of the surveyed population is higher than the average national salary. With its limited area, one would think that individuals living in Luxembourg would cross the borders quite often for shopping, leisure activities...However, Luxembourg has abundant and various services (shopping malls, leisure and cultural places ...). Indeed close to 30% of the respondents had all their activities in Luxembourg and out of the 1850 total activities, only 130 had been done in a neighboring country. But on the other hand, one fourth of the respondents had done 75% of total activities outside Luxembourg. In a way to better understand the mobility behavior of resident population, a detailed activity chain analysis will be presented. This will be completed by a spatial analysis of the activities, in order to examine the effects of the borders on non-work related activities. Finally, different activity behaviors will be identified through a multivariate analysis. The results of this explorative analysis will be compared to the abundant literature regarding the behavior of the cross-borders workers. [less ▲]

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See detailEconomic impact of cross-border work on the communes of residence : example at the french-luxembourgish border
Pigeron-Piroth, Isabelle UL; Belkacem, Rachid

Scientific Conference (2016, October 07)

The aim of this paper is to examine the economic impact of cross-border work on the communes of residence of the cross-border commuters. At the French-luxembourgish border, many people live in France and ... [more ▼]

The aim of this paper is to examine the economic impact of cross-border work on the communes of residence of the cross-border commuters. At the French-luxembourgish border, many people live in France and have a job in Luxembourg. For some communes of Lorraine, most of 80% of the employed population works abroad. The impacts of this cross-border activity not only on demographic evolution, but also on unemployment or economic activity are interesting to examine at the municipal level through quantitative datasets. What are the recent evolutions of the number of cross-border workers in the French communes? Is there an effect of the rise of cross-border commuters on unemployment or on economic activity near the borders? Finally, can the proximity of the borders be seen as an engine of regional development, or on the contrary as a disruptive element? This exploratory analysis leads to interesting first results showing the interdependencies between France and Luxembourg regarding cross-border labour. The closer to the border the communes are, the higher the percentage of cross-border commuters is. Moreover, during the last five years, the rate of people working abroad particularly rose in the communes near the borders, but also in farther communes with an easy access to Luxembourg (by road or train). But on the other hand, despite their proximity to the border, and their high rate of cross-border commuters, some communes have high unemployment rates. One part of the population doesn’t match the needs of the labour market, and especially the Luxembourgish one that requires now more and more specific and highly qualified profiles. The 2011 and 2006 census data from INSEE available at the municipal level will be used to build maps, and conduct multivariate analysis. This quantitative analysis will be completed by a focus on the French commune of Longwy, interesting by its geographic position (in the immediate vicinity of the border) and economic situation (formerly one of the main steel-industry areas of France). [less ▲]

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See detailLuxembourg: a segmented, multilingual Job Market
Heinz, Andreas UL

Scientific Conference (2016, October 05)

Luxembourg is a small, but very dynamic country. In the last 100 years, the population has more than doubled, mainly because of immigration. The proportion of foreigners rose from 3% in 1871 to 46% in ... [more ▼]

Luxembourg is a small, but very dynamic country. In the last 100 years, the population has more than doubled, mainly because of immigration. The proportion of foreigners rose from 3% in 1871 to 46% in 2015. Currently people from 170 countries live in the Grand Duchy. In addition to that, about 40% of the workforce are cross-border commuters from France, Belgium, and Germany. This has an impact on the country’s language situation. At least until the 1980s Luxembourg was mainly trilingual. French was the language of legislation and administration, German was the main language of the newspapers, and Luxembourgish was the main spoken language. Today, the traditional trilingual situation is being replaced by a more complex multilingual situation. Because of a lack of data, this change could not be analysed in detail until recently. To close this gap, the National Statistics Office STATEC included two language related questions in the 2011 census questionnaire: Which language do you know the best? Which languages do you speak on a regular basis at home, at school and at work? This data allows first-of-its-kind analysis into the complexity of the Luxembourgish language situation. After a short introduction into the language situation in Luxembourg in general, the presentation will focus on the language situation at work. Our analysis will show strong correlations between languages and occupations reflecting a split of the Luxembourg labor market in different segments: English dominates in high skilled jobs in the private sector, whereas Portuguese is the main language in low skilled jobs in the private sector. Luxembourgish is the main language in the public sector, while French is the vehicular language in both sectors. This highlights the importance of learning the “right” languages in Luxembourg. [less ▲]

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See detailTendenzen und Entwicklungen der Theaterlandschaft in Europa
Bloch, Natalie UL

Scientific Conference (2016, October 01)

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See detailThe role of ICT usage in problem-solving achievement. Findings from the PISA 2012 data
Pavlovic, Masha UL; Greiff, Samuel UL

Scientific Conference (2016, October)

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See detailL'Anti-Nomade ou la théorie critique contre la déterritorialisation
Jeusette, Julien UL

Scientific Conference (2016, October)

Depuis la publication de Mille Plateaux par Gilles Deleuze, nombreux sont les critiques littéraires et cinématographiques qui emploient les concepts de « nomadisme », « espace lisse », « ... [more ▼]

Depuis la publication de Mille Plateaux par Gilles Deleuze, nombreux sont les critiques littéraires et cinématographiques qui emploient les concepts de « nomadisme », « espace lisse », « déterritorialisation », pour mener à bien leurs analyses. La plupart du temps, ces concepts sont utilisés dans un sens positif et nécessairement libérateur, mais il est nécessaire aujourd’hui d’interroger leur potentiel « contre-fictionnel » (Yves Citton). En effet, à partir du moment où le néolibéralisme et le postfordisme imposent à l’Occident un idéal de mobilité perpétuelle (Zygmunt Baumann), le pouvoir subversif de ces concepts semble nettement atténué. En référence à L’Anti-Œdipe de Deleuze, nous appellerons L’Anti-Nomade l’ensemble (mineur) de théoriciens contemporains qui s’inscrivent contre l’injonction au nomadisme et à la « vie liquide », sans toutefois revendiquer un retour à une société « solide » ou traditionnaliste. C’est la position instable de cette théorie critique (ni en faveur du nomadisme, ni en faveur de la stabilité) qu’il s’agira ici d’interroger, afin de cerner plus précisément la puissance critique des outils de l’analyse littéraire. [less ▲]

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See detailTowards Optimised Large Scale Deployments of Electric Bus Systems with On-Route Charging
Seredynski, Marcin; Khadraoui, Djamel; Viti, Francesco UL

Scientific Conference (2016, October)

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See detailUnderstanding User Daily Mobility Using Mobile and Wearable Sensing Systems
Faye, Sébastien UL; Engel, Thomas UL

Scientific Conference (2016, October)

Recent technological advances and the ever-greater developments in sensing and computing continue to provide new ways of understanding our daily mobility. Smart devices such as smartphones or smartwatches ... [more ▼]

Recent technological advances and the ever-greater developments in sensing and computing continue to provide new ways of understanding our daily mobility. Smart devices such as smartphones or smartwatches can, for instance, provide an enhanced user experience based on different sets of built-in sensors that follow every user action and identify its environment. Monitoring solutions such as these, which are becoming more and more common, allow us to assess human behavior and movement at different levels. In this article, we focus on the concept of human mobility. With the participation of 13 individuals, we carried out an experiment to discover how groups of sensors currently available in smartphones and smartwatches can help to distinguish different profiles and patterns of human mobility. We show that it is possible to use not only motion sensors but also physiological sensors and environmental data provided, for instance, by Wi-Fi. Finally, detailed study of these categories enables us to offer a way of representing the mobility of individual users, based on anonymized traces and graph theory. [less ▲]

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See detailFlexible State-Merging for learning (P)DFAs in Python
Hammerschmidt, Christian UL; Loos, Benjamin Laurent UL; Verwer, Sicco et al

Scientific Conference (2016, October)

We present a Python package for learning (non-)probabilistic deterministic finite state automata and provide heuristics in the red-blue framework. As our package is built along the API of the popular ... [more ▼]

We present a Python package for learning (non-)probabilistic deterministic finite state automata and provide heuristics in the red-blue framework. As our package is built along the API of the popular \texttt{scikit-learn} package, it is easy to use and new learning methods are easy to add. It provides PDFA learning as an additional tool for sequence prediction or classification to data scientists, without the need to understand the algorithm itself but rather the limitations of PDFA as a model. With applications of automata learning in diverse fields such as network traffic analysis, software engineering and biology, a stratified package opens opportunities for practitioners. [less ▲]

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See detailValue Stream Management zur Synchronisation im Unternehmensverbund
Plapper, Peter UL

Scientific Conference (2016, October)

Das Thema „Wertstrom Management“ wird in Luxemburg bereits in der Bachelor Ausbildung vermittelt und für die Master vertieft. In der Forschung erweist dieses Werkzeug großes Potential zur Synchronisation ... [more ▼]

Das Thema „Wertstrom Management“ wird in Luxemburg bereits in der Bachelor Ausbildung vermittelt und für die Master vertieft. In der Forschung erweist dieses Werkzeug großes Potential zur Synchronisation und Optimierung der Wertschöpfung im Unternehmensverbund, das wir hier vorstellen möchten: Mit der Methode VSM lässt sich Verschwendung erkennen und Wertschöpfungspotentiale heben. Die Verschwendung wird damit nicht nur in den produktiven Unternehmensbereichen, sondern auch in indirekten Bereichen und ebenso in Verwaltungsfunktionen und administrativen Abteilungen visualisiert. Man erkennt Möglichkeiten, die Verschwendung abzubauen und die Wertschöpfung zu erhöhen. Bei der praktischen Anwendung dieses leistungsfähigen Werkzeugs erwiesen sich die Schnittstellen zwischen den Unternehmen als immerwährende Quellen von Verschwendung und Ineffizienzen. Hier sind die unterschiedlichen Ausprägungen der Methode VSM hinderlich für eine durchgängige Anwendung dieser Methode. Aus dieser Erkenntnis heraus schlagen wir eine Vereinheitlichung der „Best Practices“ als Industrie Standard bzw. als internationale Norm vor. Im Rahmen der aktuell laufender Forschungsprojekte an der Universität Luxemburg werden Methoden entwickelt, um das Wertstrom Management international zu standardisieren und allgemein zu vereinheitlichen. [less ▲]

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See detailLearning Deterministic Finite Automata from Infinite Alphabets
Pellegrino, Gaetano; Hammerschmidt, Christian UL; Lin, Qin et al

Scientific Conference (2016, October)

We proposes an algorithm to learn automata infinite alphabets, or at least too large to enumerate. We apply it to define a generic model intended for regression, with transitions constrained by intervals ... [more ▼]

We proposes an algorithm to learn automata infinite alphabets, or at least too large to enumerate. We apply it to define a generic model intended for regression, with transitions constrained by intervals over the alphabet. The algorithm is based on the Red \& Blue framework for learning from an input sample. We show two small case studies where the alphabets are respectively the natural and real numbers, and show how nice properties of automata models like interpretability and graphical representation transfer to regression where typical models are hard to interpret. [less ▲]

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See detailComputer-based assessment of transversal competence. The case of problem-solving competence
Greiff, Samuel UL

Scientific Conference (2016, October)

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See detailConclusive remarks: Putting Forward the Principles of Life Time Contracts
Ratti, Luca UL

Scientific Conference (2016, September 30)

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See detailLe terrorisme poétique comme antidote
Roelens, Nathalie UL

Scientific Conference (2016, September 30)

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See detailDer Übergang in Arbeit und seine Auswirkungen auf die gesellschaftliche Integration und das Erwachsenwerden von Jugendlichen
Joachim, Patrice UL; Weis, Daniel UL

Scientific Conference (2016, September 29)

Die Phase des Übergangs vom Jugend- zum Erwachsenenalter wird von gesellschaftlichen Normvorstellungen und entsprechenden Erwartungen begleitet. Aus entwicklungspsychologischer Perspektive werden den ... [more ▼]

Die Phase des Übergangs vom Jugend- zum Erwachsenenalter wird von gesellschaftlichen Normvorstellungen und entsprechenden Erwartungen begleitet. Aus entwicklungspsychologischer Perspektive werden den Jugendlichen bestimmte Entwicklungsaufgaben zugeschrieben, die in dieser Phase bewältigt werden sollen (Havighurst 1972). Darunter werden Anforderungen an das Individuum verstanden, deren Bewältigung zu einer erfolgreichen gesellschaftlichen Integration notwendig ist. Zu den Wesentlichen gehören die Ablösung vom Elternhaus, die Gründung einer eigenen Familie, die Aufnahme einer Erwerbstätigkeit und damit zusammenhängend eine ökonomische Unabhängigkeit (Hurrelmann 2009, Kerckhoff 2000, Merkens 2012). Im Widerspruch zu diesen Normen stehen die zu beobachtenden Tendenzen einer immer weniger normierten Transitionsgestaltung: Übergänge werden zunehmend individueller und verlaufen weniger einheitlich (Konietzka 2010). Diese Entwicklung führte in den vergangenen Jahren und Jahrzehnten zu einer Verlängerung der Jugendphase (Zinnecker 2003), einer Verlagerung von Transitionsmarkern auf einen späteren Zeitpunkt, einer Entkopplung von Transitionsereignissen sowie einer Diversität bzw. De-Standardisierung von Verläufen (Stauber/Walther 2004). Damit einhergehend ist die Phase des Übergangs mit geringerer Sicherheit und Planbarkeit sowie höherem Risiko für das Individuum verbunden. Dies betrifft insbesondere den Übergang junger Menschen in den Arbeitsmarkt, der im Fokus des Vortrags steht. Vorgestellt wird eine Typologie von Transitionsverläufen und Bewältigungsmustern junger Menschen in Luxemburg sowie deren subjektive Perspektiven auf das Erwachsenwerden und Erwachsensein. Durch die typologische Einordnung auf Basis der individuellen Erfahrungen und Deutungen können Erfolgsfaktoren, Gelingensbedingungen und Hemmnisse für den Übergang ins Erwerbsleben identifiziert werden. Dabei zeigt sich, dass Transitionsprobleme zu Maßnahmenkarrieren, Armut, sozialer Exklusion und gesundheitlichen bzw. psychischen Beeinträchtigungen führen können. Sie erschweren aber nicht nur die gesellschaftliche Integration, sondern haben darüber hinaus auch Einfluss auf das subjektive Gefühl des Erwachsenseins. Die Präsentation basiert auf den Ergebnissen einer qualitativen Befragung von 77 Jugendlichen und jungen Erwachsenen im Rahmen des luxemburgischen Jugendberichts 2015. [less ▲]

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See detailRevenir sur la phrase simple et sur la phrase complexe avec les doctorants à partir de Scientext
Lejot, Eve UL; Bidou, Aurélie

Scientific Conference (2016, September 29)

Dans cette communication, nous abordons la question de l’utilisation des corpus à des fins grammaticales dans le domaine de la littéracie universitaire. Chamber (2007) et notamment Cavalla & Loiseau (2013 ... [more ▼]

Dans cette communication, nous abordons la question de l’utilisation des corpus à des fins grammaticales dans le domaine de la littéracie universitaire. Chamber (2007) et notamment Cavalla & Loiseau (2013) proposent des adaptations didactiques de « l’outil corpus » dans le contexte de l’enseignement supérieur. Nous proposons ici une approche « théorisante » (Laborde-Milaa, Boch, & Reuter 2004.) pour que les étudiants interprètent la théorie dans leur contexte rédactionnel, c’est-à-dire appliqué au genre du doctorat et dans un contexte disciplinaire précis. Les doctorants se familiarisent aux écrits universitaires de manière inductive (Boch 2013) sur les pratiques scripturales des cultures disciplinaires. Cette étude est menée auprès de deux groupes en parallèle : les doctorants de Sciences humaines d’un côté puis ceux de droit de l’autre. La question ici qui se pose est ce qui est « enseignable » en matière de problématisation selon les disciplines (Pollet, 2004) pour travailler sur la qualité des écrits de doctorants natifs et non natifs dans un même groupe. Nos objectifs d’enseignement sont la maîtrise de la phrase simple et de la phrase composée dans les écrits académiques. La séquence que nous allons développer est ciblée sur deux aspects linguistiques du FOU et du FLE : la concordance des temps et la syntaxe dans la phraséologie scientifique. Notre question principale de recherche de savoir si l’approche par la grammaire et la phraséologie contextualisés dans les discours académiques a une répercussion sur les écrits des doctorants. Nous évaluerons également la réaction des doctorants face à cette approche. Observe-t-on une différence de réaction entre les doctorants natifs et non natifs francophones ? Entre les doctorants de sciences humaines et de droit ? Notre objectif de recherche est de susciter l’intérêt des doctorants pour la grammaire en faisant un pont entre la grammaire de la phrase et les écrits académiques grâce au corpus en ligne Scientext. Nous cherchons à plus long terme à leur permettre de maîtriser un style plus fluide pour se concentrer sur un contenu plus cohérent. Le corpus de cette recherche se compose des phrases retravaillées des propres textes des doctorants à la fin de la séquence et des questionnaires d’évaluation de la séquence" par les doctorants. [less ▲]

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See detailHigher Algebra over the Leibniz Operad
Poncin, Norbert UL

Scientific Conference (2016, September 25)

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See detailMethodological Lessons learned from the Luxembourgish Safety Survey
Heinz, Andreas UL

Scientific Conference (2016, September 23)

In 2011, the European Commission submitted a proposal to the European Parliament to conduct the “European Safety Survey” (SASU) in 2013, to gather EU-wide data regarding victimization, fear of crime, and ... [more ▼]

In 2011, the European Commission submitted a proposal to the European Parliament to conduct the “European Safety Survey” (SASU) in 2013, to gather EU-wide data regarding victimization, fear of crime, and other crime related experiences and opinions. The SASU questionnaire was pretested using an adjusted and shortened version of the International Crime Victims Survey questionnaire. However, the European Parliament rejected the proposal because of concerns over the survey’s costs and questions regarding its “added value”, given that some member states already were conducting their own victimization surveys. Because the EU-wide approach had failed and Luxembourg had no victimization survey of its own, the “Institut national de la statistique et des études économiques” (STATEC) decided to conduct the “Luxembourgish Safety Survey” to obtain updated data using the Safety Survey questionnaire. This paper presents the main methodological findings from the “Luxembourgish Safety Survey”: Why is Computer Assisted Telephone Interviewing problematic? Does the order of questions matter? Which questions didn’t work? [less ▲]

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See detailAn agent-based model to simulate the feedback effect between traffic-induced air pollution and urban structure
Schindler, Mirjam UL; Caruso, Geoffrey UL

Scientific Conference (2016, September 22)

A spatial complexity currently of increasing concern is the relation between the internal structure of urban areas and traffic‐induced air pollution. Urban air pollution has severe impacts on the ... [more ▼]

A spatial complexity currently of increasing concern is the relation between the internal structure of urban areas and traffic‐induced air pollution. Urban air pollution has severe impacts on the environment and on human health with traffic being its major source. Air pollution from traffic varies locally within the city depending on traffic patterns that arise from the spatial arrangement of land uses and subsequent travel demand across time. In this paper, we contribute a dynamic agent‐based residential model (ABM) applied to 2D theoretical space based on micro‐economic principles with local exposure and pollution externalities arising from car commuting traffic and an endogenous road network. We analyse the effects of households’ aversion to generating and being exposed to local traffic pollution on emerging land use patterns and pollution distribution. The focus is thereby set on endogenising local health but also global environmental concerns of traffic‐induced air pollution in location choice. The ABM framework allows discussing the spatial interactions against the background of pollution‐related (e.g., pollutant diffusion, cold‐start emissions, additional emissions through traffic congestion) and preference‐related (e.g., exposure during the commute versus at the residential location, size of the impact neighbourhood) framework conditions and planning approaches (localized lump‐sum taxes, cordon tolls, flat taxes). We discuss the stability and performance criteria of the resulting cities, which are on the one hand city aggregates (e.g., total emissions, total exposure, spatial extent of the urban area), but on the other hand and more importantly location‐dependent disaggregates (local patterns of land rents, exposure, green spaces, design of the road network). Thus, our paper interlinks pollution‐related concerns and urban structures from a health and environmental perspective, which take place at different spatial scales (different radii of interaction) and thereby ties in with the compaction‐sprawl debate in the literature. [less ▲]

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