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

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

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

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

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See detailWie wirken sich Klassenwiederholungen in der Sekundarstufe 1 auf spätere Schulnoten aus? Eine Längsschnittanalyse
Klapproth, Florian; Fischbach, Antoine UL; Keller, Ulrich UL et al

Scientific Conference (2018, November)

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See detailSystemic network analysis identifies XIAP and IkappaBalpha as potential drug targets in TRAIL resistant BRAF mutated melanoma.
Del Mistro, Greta; Lucarelli, Philippe UL; Muller, Ines et al

in NPJ systems biology and applications (2018), 4

Metastatic melanoma remains a life-threatening disease because most tumors develop resistance to targeted kinase inhibitors thereby regaining tumorigenic capacity. We show the 2nd generation hexavalent ... [more ▼]

Metastatic melanoma remains a life-threatening disease because most tumors develop resistance to targeted kinase inhibitors thereby regaining tumorigenic capacity. We show the 2nd generation hexavalent TRAIL receptor-targeted agonist IZI1551 to induce pronounced apoptotic cell death in mutBRAF melanoma cells. Aiming to identify molecular changes that may confer IZI1551 resistance we combined Dynamic Bayesian Network modelling with a sophisticated regularization strategy resulting in sparse and context-sensitive networks and show the performance of this strategy in the detection of cell line-specific deregulations of a signalling network. Comparing IZI1551-sensitive to IZI1551-resistant melanoma cells the model accurately and correctly predicted activation of NFkappaB in concert with upregulation of the anti-apoptotic protein XIAP as the key mediator of IZI1551 resistance. Thus, the incorporation of multiple regularization functions in logical network optimization may provide a promising avenue to assess the effects of drug combinations and to identify responders to selected combination therapies. [less ▲]

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See detailGrenzüberschreitende Umwelten
Schulz, Christian UL

Article for general public (2018)

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

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

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See detailStudying Borders
Wille, Christian UL

Article for general public (2018)

Die Border Studies durchlaufen auch in der Großregion eine spürbare Institutionalisierung. Allerdings hier mit der Besonderheit, dass Fragen der Grenze und die damit verbundenen Phänomene nicht nur ... [more ▼]

Die Border Studies durchlaufen auch in der Großregion eine spürbare Institutionalisierung. Allerdings hier mit der Besonderheit, dass Fragen der Grenze und die damit verbundenen Phänomene nicht nur untersucht und gelehrt werden, sondern dass dies selbst grenzüberschreitend stattfindet. Hier haben sich Grenzforscher_innen der Universitäten des Saarlandes, Kaiserslautern, Trier, Lothringen, Luxemburg und Lüttich im Jahr 2014 unter dem Dach der Universität Großregion (UniGR) zusammengeschlossen. Mit dem grenzüberschreitenden Netzwerk „UniGR-Center for Border Studies“ haben sie sich eine Plattform gegeben, um Grenzforschungen enger abzustimmen, an die internationale Fachdebatte besser anzuschließen und Erkenntnisse der Grenzforschung in die universitäre Lehre zu tragen. Grenzforschung, wie sie sich aktuell in der Großregion formiert und künftig entwickeln wird, ist hier an die Erfahrung der Grenze geknüpft und bleibt ein kollektives Unterfangen der UniGR-Grenzforscher_innen. [less ▲]

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

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

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See detailUser-Device Authentication in Mobile Banking using APHEN for Paratuck2 Tensor Decomposition
Charlier, Jérémy Henri J. UL; Falk, Eric UL; State, Radu UL et al

in Proceedings of 2018 IEEE International Conference on Data Mining Workshops (ICDMW) (2018)

The new financial European regulations such as PSD2 are changing the retail banking services. Noticeably, the monitoring of the personal expenses is now opened to other institutions than retail banks ... [more ▼]

The new financial European regulations such as PSD2 are changing the retail banking services. Noticeably, the monitoring of the personal expenses is now opened to other institutions than retail banks. Nonetheless, the retail banks are looking to leverage the user-device authentication on the mobile banking applications to enhance the personal financial advertisement. To address the profiling of the authentication, we rely on tensor decomposition, a higher dimensional analogue of matrix decomposition. We use Paratuck2, which expresses a tensor as a multiplication of matrices and diagonal tensors, because of the imbalance between the number of users and devices. We highlight why Paratuck2 is more appropriate in this case than the popular CP tensor decomposition, which decomposes a tensor as a sum of rank-one tensors. However, the computation of Paratuck2 is computational intensive. We propose a new APproximate HEssian-based Newton resolution algorithm, APHEN, capable of solving Paratuck2 more accurately and faster than the other popular approaches based on alternating least square or gradient descent. The results of Paratuck2 are used for the predictions of users' authentication with neural networks. We apply our method for the concrete case of targeting clients for financial advertising campaigns based on the authentication events generated by mobile banking applications. [less ▲]

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See detailEvidence for the homothetic scaling of urban forms
Lemoy, Rémi UL; Caruso, Geoffrey UL

in Environment and Planning B: Urban Analytics and City Science (2018)

The size and form of cities influence their social and environmental impacts. Whether cities have the same form irrespective of their size is still an open question. We analyse the profile of artificial ... [more ▼]

The size and form of cities influence their social and environmental impacts. Whether cities have the same form irrespective of their size is still an open question. We analyse the profile of artificial land and population density, with respect to the distance to their main centre, for the 300 largest European cities. Our analysis combines the GMES/Copernicus Urban Atlas 2006 land use database at 5 m resolution for 300 larger urban zones with more than 100,000 inhabitants and the Geostat population grid at 1 km resolution. We find a remarkable constancy of radial profiles across city sizes. Artificial land profiles scale in the two horizontal dimensions with the square root of city population, while population density profiles scale in three dimensions with its cube root. In short, cities of different size are homothetic in terms of land use and population density, which challenges the idea that larger cities are more parsimonious in the use of land per capita. While earlier literature documented the scaling of average densities (total surface and population) with city size, we document the scaling of the whole radial distance profile with city size, thus liaising intra-urban radial analysis and systems of cities. Our findings also yield homogenous spatial definitions of cities, from which we can re-question urban scaling laws and Zipf’s law for cities. [less ▲]

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

in Proceedings of ICERI2018 (2018, November)

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See detailFrom Words to Images Through Legal Visualization
Rossi, Arianna UL; Palmirani, Monica

in Pagallo, Ugo; Palmirani, Monica; Casanovas, Pompeu (Eds.) et al AI Approaches to the Complexity of Legal Systems: AICOL International Workshops 2015–2017: AICOL-VI@ JURIX 2015, AICOL-VII@ EKAW 2016, AICOL-VIII@ JURIX 2016, AICOL-IX@ ICAIL 2017, and AICOL-X@ JURIX 2017, Revised Selected Papers (2018)

One of the common characteristics of legal documents is the absolute preponderance of text and their specific domain language, whose complexity can result in impenetrability for those that have no legal ... [more ▼]

One of the common characteristics of legal documents is the absolute preponderance of text and their specific domain language, whose complexity can result in impenetrability for those that have no legal expertise. In some experiments, visual communication has been introduced in legal documents to make their meaning clearer and more intelligible, whilst visualizations have also been automatically generated from semantically-enriched legal data. As part of an ongoing research that aims to create user-friendly privacy terms by integrating graphical elements and Semantic Web technologies, the process of creation and interpretation of visual legal concepts will be discussed. The analysis of current approaches to this subject represents the point of departure to propose an empirical methodology that is inspired by interaction and human-centered design practices. [less ▲]

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See detailOptimal dispatching of electric and hybrid buses subject to scheduling and charging constraints
Rinaldi, Marco UL; Parisi, Federico; Laskaris, Georgios UL et al

Scientific Conference (2018, November)

We consider the problem of optimally determining the sequence of electric and hybrid buses departing from a multi-line bus terminal, considering both service constraints (schedule adherence) and energy ... [more ▼]

We consider the problem of optimally determining the sequence of electric and hybrid buses departing from a multi-line bus terminal, considering both service constraints (schedule adherence) and energy constraints (electric bus charging status, bus recharging scheduling in capacitated facilities). The problem is formulated as a Mixed Integer Linear Program, with the objective of minimizing the total operational cost for the bus lines in question. System dynamics are captured by practical sets of constraints, ranging from scheduling adherence to discharge- recharge dynamics. Individual operational costs at the bus level and at the trip level are fully parametrized, allowing for extensive sensitivity analysis. We investigate a real-life case study based on the city of Luxembourg, where two charging stations have been installed in the central station’s bus terminal. Experimental results show that, while full electrification is indeed possible, the required fleet size depends strongly on the given line(s) timetable. [less ▲]

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See detailControllability of transportation networks
Rinaldi, Marco UL

in Transportation Research. Part B, Methodological (2018), 118

Network-wide traffic control policies determine the optimal values for the different kinds of controllers equipped on a transportation network, with the objective of reducing de- lays and congestion ... [more ▼]

Network-wide traffic control policies determine the optimal values for the different kinds of controllers equipped on a transportation network, with the objective of reducing de- lays and congestion, improving safety and reaching a target Level of Service. While models and algorithms for these problems have been extensively studied in literature, little at- tention has been devoted to investigating whether/how different locations, kinds (pricing controllers, traffic lights, ...) and amounts of controllers in a network affect the overall performance of network-wide schemes. In this work, we adapt the control-theoretical approach of controllability of complex networks to the specific instance of transportation networks, considering both propaga- tion/spillback dynamics and users’ behavior in terms of route choice. Thanks to the newly developed methodology, we then provide exact solutions to the Full Controllability Pric- ing Controller Location Problem for transportation networks. Comparing different pricing controller location policies through two artificial test cases, we empirically demonstrate how indeed the amount and kind of controllers in a network strongly affect the level of performance reachable by network-wide control policies, specifically in terms of Total Cost minimization. [less ▲]

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See detailBerezin-Toeplitz quantization and naturally defined star products for Kähler manifolds
Schlichenmaier, Martin UL

in Analysis and Mathematical Physics (2018), 8(4), 691-710

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See detailEuropean Union Funds
Pantazatou, Aikaterini UL

in Hofmann, Herwig; Rowe, Gerard; Türk, Alexander (Eds.) Specialized Administrative Law of the European Union: A Sectoral Review (2018)

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See detailGive me the eyes
Cicotti, Claudio UL

in Cicotti, Claudio (Ed.) The many faces of 1918 (2018)

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See detailMedia Pluralism Monitor 2017: Luxembourg
Kies, Raphaël UL; Schall, Céline UL

Report (2018)

Detailed reference viewed: 114 (3 UL)