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See detailA Multiplicative Law of Network Traffic and Its Consequences.
Melakessou, Foued UL; Sorger, Ulrich UL; Suchanecki, Zdzislaw UL

in Acta Physica Polonica B (2009), 40(5), 1507-1525

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See detailMultiplicative order and Frobenius symbol for the reductions of number fields
Perucca, Antonella UL

E-print/Working paper (2017)

Detailed reference viewed: 44 (5 UL)
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See detailMultiplicities of Galois representations of weight one
Wiese, Gabor UL

in Algebra Number Theory (2007), 1(1), 67--85

In this article we consider mod p modular Galois representations which are unramified at p such that the Frobenius element at p acts through a scalar matrix. The principal result states that the ... [more ▼]

In this article we consider mod p modular Galois representations which are unramified at p such that the Frobenius element at p acts through a scalar matrix. The principal result states that the multiplicity of any such representation is bigger than 1. [less ▲]

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See detailMultiplicity, Eine plurale Stadt im Spiegel der Sozialwissenschaften
Fehlen, Fernand UL

in Ons Stad (2012), (101), 4-9

Detailed reference viewed: 48 (1 UL)
See detailMultiplikatorenschulung oder wie Fremdsprachenlehrende zu WeiterbildnerInnen werden
Höppner, Kristina D. C. UL; Bosch, Hildegard

Book published by Hueber (2008)

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See detailA multiplurilingual space for language education. How can teacher education respond to the linguistic and cultural diversity in a given place?
Ehrhart, Sabine UL; Bes Izuel, Asuncion UL

in Voces y Silencios (2018)

Luxembourg is one of the countries with the highest degree of linguistic variety in Europe. The situation of the classroom is challenging as at least three school languages meet children with a ... [more ▼]

Luxembourg is one of the countries with the highest degree of linguistic variety in Europe. The situation of the classroom is challenging as at least three school languages meet children with a multilingual background in their families, very frequently of a different type of repertoire (with more than 50% of the school population having a migrational background). The school system tries to find solutions through the creation of adapted teaching models for newly arrived students and pupils, according to their profile. The research project that we present is based on two pillars: an institutional co-construction between teachers and researchers, with an orientation of mutual empowerment, and an international cooperation between two researchers forming a tandem with more than two wheels because of their experience in teacher education and educational research in various multilingual spaces, not only in Luxembourg, but also in Spain, France, Germany, Russia, the South Pacific, Madagascar and Siberia. [less ▲]

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See detailMultiPluriTrans. Emerging Fields in Educational Ethnography. Introduction to the conference
Bollig, Sabine UL; Neumann, Sascha UL

Scientific Conference (2013, November 21)

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See detailMultiPluriTrans: Oder:Does Educational Ethnography remain what it used to be?
Hekel, Nicole UL; Husen, Onno

in Zeitschrift für Qualitative Forschung (2016), 1

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See detailMultipoint Lax operator algebras. Almost-graded structure and central extensions
Schlichenmaier, Martin UL

in Sbornik: Mathematics (2014), 205(5), 117-160

Recently, Lax operator algebras appeared as a new class of higher genus current type algebras. Based on I.Krichever's theory of Lax operators on algebraic curves they were introduced by I. Krichever and O ... [more ▼]

Recently, Lax operator algebras appeared as a new class of higher genus current type algebras. Based on I.Krichever's theory of Lax operators on algebraic curves they were introduced by I. Krichever and O. Sheinman. These algebras are almost-graded Lie algebras of currents on Riemann surfaces with marked points (in-points, out-points, and Tyurin points). In a previous joint article of the author with Sheinman the local cocycles and associated almost-graded central extensions are classified in the case of one in-point and one out-point. It was shown that the almost-graded extension is essentially unique. In this article the general case of Lax operator algebras corresponding to several in- and out-points is considered. In a first step it is shown that they are almost-graded. The grading is given by the splitting of the marked points which are non-Tyurin points into in- and out-points. Next, classification results both for local and bounded cocycles are shown. The uniqueness theorem for almost-graded central extensions follows. For this generalization additional techniques are needed which are presented in this article [less ▲]

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See detailMultiprecision Multiplication on ARMv8
Liu, Zhe UL; Järvinen, Kimmo; Liu, Weiqiang et al

in IEEE 24th Symposium on Computer Arithmetic - ARITH24 (2017, August 01)

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See detailMultiprofessional collaboration in Finnish schools
Vainikainen, M.-P; Thuneberg, H.; Greiff, Samuel UL et al

in International Journal of Educational Research (2015), 72

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See detailMultirésidences et travail frontalier au Luxembourg et dans la Grande Région Saar-Lor-Lux
Pigeron-Piroth, Isabelle UL

in Hamman, Philippe; Blanc, Maurice; Duchêne-Lacroix, Cédric (Eds.) et al Questionner les mobilités résidentielles à l'aune de la multilocalité (2014)

Définis par un lieu de résidence et un lieu de travail situés dans deux Etats différents « où ils retournent en principe chaque jour ou au moins une fois par semaine » (Règlement CE 883/2004), les ... [more ▼]

Définis par un lieu de résidence et un lieu de travail situés dans deux Etats différents « où ils retournent en principe chaque jour ou au moins une fois par semaine » (Règlement CE 883/2004), les travailleurs frontaliers sont concernés par diverses formes de mobilités domicile-travail ou même résidentielles. Or la définition de la résidence n’est pas toujours évidente et unique, les personnes multirésidentes, c’est-à-dire ayant simultanément plusieurs lieux de résidence ne sont plus marginales. Encore peu étudiée jusqu’alors, la multirésidence des travailleurs frontaliers est riche d’enseignements quant aux rapports qu’ils entretiennent avec l’espace, et plus précisément avec le Luxembourg et les frontières. Nous tenterons par cette communication qui se veut plutôt méthodologique, d’apporter des éléments de compréhension des pratiques de mobilité des travailleurs frontaliers selon leurs profils socio-économiques par exemple. [less ▲]

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See detailMultiscale computational mechanics: industrial applications
Bordas, Stéphane UL; Kerfriden, Pierre; Beex, Lars UL et al

Presentation (2014, November 25)

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See detailA Multiscale DEM-VOF Method for the simulation of three-phase flows
Pozzetti, Gabriele UL; Peters, Bernhard UL

in International Journal of Multiphase Flow (2018), 99

A novel multiscale approach for three-phase flows is presented. The goal of the proposed method is to solve arbitrary three-phase flow configurations in a computationally efficient way, and in particular ... [more ▼]

A novel multiscale approach for three-phase flows is presented. The goal of the proposed method is to solve arbitrary three-phase flow configurations in a computationally efficient way, and in particular taking into account the effects of different length scales while sharply reducing the computational burden. This is particularly important in chemical, environmental, and process engineering, where large-scale quantities are normally of interest, but small-scale dynamics cannot be neglected. The method is based on the definition of two different length scales: the bulk scale, and the fluid fine scale. A dual-grid approach is adopted in order to resolve the bulk scale with information from the fluid fine scale. It is shown that the described method succeeds in delivering more accuracy than a standard approach based on the volume averaging technique, still, it remains suitable for the solution of real interest problems. The method is shown to successfully satisfy experimental results presented in the literature. Examples of three-phase flows simulations are provided to show how the proposed numerical approach can describe the physics of particle-laden, free surface flows with competitive computational cost. It is shown how the proposed method can naturally extend the DEM-VOF method to the presence of complex interface dynamics. [less ▲]

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See detailMultiscale fracture across scales and time
Bordas, Stéphane UL; Kerfriden, Pierre

Scientific Conference (2014, November 11)

Multi-scale Computational Mechanics in Aerospace Engineering Flying is today one of the safest ways to spend our time. In the United Kingdom, for example, it is 33,000 times more likely to die from a ... [more ▼]

Multi-scale Computational Mechanics in Aerospace Engineering Flying is today one of the safest ways to spend our time. In the United Kingdom, for example, it is 33,000 times more likely to die from a clinical error than from an air crash. This is probably the consequence of over a century of experience building, starting with the Wright brothers at the beginning of the 20th century to the most recent aerospace developments culminating in technological giants such as the Airbus A380 and the Boeing Dreamliner, through the enlightening catastrophic events of the "Comet Aircraft”, ``Liberty Ships'' and many others. Yet, with the increasing urge to increase flight efficiency, decrease costs and Carbon emissions, airlines have been pushed to drive down the weight of aircraft, whilst guaranteeing their safety. This push for lighter aircraft has progressively seen a reduction in the use of metallic components which have been slowly replaced by composite materials. Such composite materials are made up of two or more phases of which they exploit the mechanical complementarity. For some applications, such as thermal barrier coatings, thermal complementarity is also leveraged. Yet, these novel materials, and especially their failure mechanisms and durability have proven difficult to understand, both through physical and virtual, in silico, experiments. One of the reasons for this is the large ratio between the size of the smallest constituent relevant in the description of failure mechanisms (e.g. 5-10 micron diameter carbon fibres) and the size of the structure (79m wingspan A380). In this presentation, we will briefly review advances in modeling and simulation of failure across the scales. We will discuss non exhaustively some of the recent advances in this field, ranging from adaptive atomistic modeling of fracture to algebraic model reduction methods for severely non-linear problems, including homogenization. We will also discuss the relevance of such simulations in daily engineering practice and claim that devising interactive simula- tors able to let engineers interact with the composite structure of interest and thus develop intuition about these advanced and complex materials. We will conclude by making a parallel between the difficulties encountered in modeling complex aerospace components and those met in personalized medicine, by discussing briefly the concept of Digital Twin. [less ▲]

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See detailMultiscale fracture: a natural connection between reduced order models and homogenisation
Bordas, Stéphane UL; Beex, Lars UL; Chen, Li UL et al

Scientific Conference (2019, May 13)

Detailed reference viewed: 67 (3 UL)
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See detailMultiscale hedge ratio between the spot and future prices of carbon: Wavelet Based Approach
Nsouadi, Ange; Terraza, Virginie UL

E-print/Working paper (2016)

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See detailMultiscale hydrogeological and hydrogeophysical approach to monitor vadose zone hydrodynamics of a karst system
Watlet, Arnaud; Poulain, Amaël; Francis, Olivier UL et al

Poster (2016)

The vadose zone of karst systems plays an important role on the water dynamics. In particular, temporary perched aquifers can appear in the subsurface due to changes of weather conditions, reduced ... [more ▼]

The vadose zone of karst systems plays an important role on the water dynamics. In particular, temporary perched aquifers can appear in the subsurface due to changes of weather conditions, reduced evapotranspiration and the vertical gradients of porosity and permeability. Although many difficulties are usually encountered when studying karst environments due to their heterogeneities, cave systems offer an outstanding opportunity to investigate vadose zone from the inside. We present a multi-scale study covering two years of hydrogeological and geophysical monitoring of the Lomme Karst System (LKS) located in the Variscan fold-and-thrust belt (Belgium), a region (∼3000 ha) that shows many karstic networks within Devonian limestone units. Hydrogeological data cover the whole LKS and involve e.g. flows and levels monitoring or tracer tests performed in both vadose and saturated zones. Such data bring valuable information on the hydrological context of the studied area at the catchment scale. Combining those results with geophysical measurements allows validating and imaging them at a smaller scale, with more integrative techniques. Hydrogeophysical measurements are focused on only one cave system of the LKS, at the Rochefort site (∼40 ha), taking benefit of the Rochefort Cave Laboratory (RCL) infrastructures. In this study, a microgravimetric monitoring and an Electrical Resistivity Tomography (ERT) monitoring are involved. The microgravimetric monitoring consists in a superconducting gravimeter continuously measuring gravity changes at the surface of the RCL and an additional relative gravimeter installed in the underlying cave located 35 meters below the surface. While gravimeters are sensible to changes that occur in both the vadose zone and the saturated zone of the whole cave system, combining their recorded signals allows enhancing vadose zone’s gravity changes. Finally, the surface ERT monitoring provide valuable information at the (sub)-meter scale on the hydrological processes that occur in the vadose zone. Seasonal water variations and preferential flow path are observed. This helps separating the hydrological signature of the vadose zone from that of the saturated zone. [less ▲]

Detailed reference viewed: 91 (11 UL)