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See detailLe préjugement au fond comme critère de partialité objective
Menetrey, Séverine UL

in Recueil Dalloz (2013)

Detailed reference viewed: 45 (1 UL)
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See detailA preliminary assessment of the effects of migration on the production structure in Europe: A labor task approach
Joxhe, Majlinda UL; De Arcangelis, Giuseppe; Borelli, Stefania

in Economics Bulletin (2019), 39(1), 289-294

We assess the e ffect of migration on the production structure in a selection of European countries for the pre-Great Recession period 2001-2009. We propose a labor-task approach where the inflow of ... [more ▼]

We assess the e ffect of migration on the production structure in a selection of European countries for the pre-Great Recession period 2001-2009. We propose a labor-task approach where the inflow of migrants raises the relative supply of manual-physical (or simple) tasks and therefore favors simple-task intensive sectors. We use the US O*NET database in conjunction with European labor data to calculate the index of simple-task intensity at the industry and country level. The analysis confi rms that a rise in employment migration rates has a generalized positive impact, but that value-added increases signi ficantly more in sectors that use more intensively simple tasks. A traditional shift-share instrument is used to overcome possible endogeneity problems. [less ▲]

Detailed reference viewed: 30 (4 UL)
See detailThe Preliminary Criminal Procedure in Luxembourg
Petschko, Martin UL; Schiltz, Marc; Tosza, Stanislaw UL

in Ligeti, Katalin (Ed.) Toward a Prosecutor for the European Union (2013)

Detailed reference viewed: 87 (24 UL)
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See detailA preliminary investigation of the growth of an aneurysm with a multiscale monolithic Fluid-Structure interaction solver
Cerroni, D.; Manservisi, S.; Pozzetti, Gabriele UL

in Journal of Physics: Conference Series (2015), 655(1), 012050

In this work we investigate the potentialities of multi-scale engineering techniques to approach complex problems related to biomedical and biological fields. In particular we study the interaction ... [more ▼]

In this work we investigate the potentialities of multi-scale engineering techniques to approach complex problems related to biomedical and biological fields. In particular we study the interaction between blood and blood vessel focusing on the presence of an aneurysm. The study of each component of the cardiovascular system is very difficult due to the fact that the movement of the fluid and solid is determined by the rest of system through dynamical boundary conditions. The use of multi-scale techniques allows us to investigate the effect of the whole loop on the aneurysm dynamic. A three-dimensional fluid-structure interaction model for the aneurysm is developed and coupled to a mono-dimensional one for the remaining part of the cardiovascular system, where a point zero-dimensional model for the heart is provided. In this manner it is possible to achieve rigorous and quantitative investigations of the cardiovascular disease without loosing the system dynamic. In order to study this biomedical problem we use a monolithic fluid-structure interaction (FSI) model where the fluid and solid equations are solved together. The use of a monolithic solver allows us to handle the convergence issues caused by large deformations. By using this monolithic approach different solid and fluid regions are treated as a single continuum and the interface conditions are automatically taken into account. In this way the iterative process characteristic of the commonly used segregated approach, it is not needed any more. [less ▲]

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See detailPreliminary investigation on the capability of eXtended Discrete Element method for treating the dripping zone of a blast furnace
Baniasadi, Maryam UL; Peters, Bernhard UL

in ISIJ International (2017), 58(1),

The role of molten iron and slag in the dripping zone of a blast furnace is very critical to reach a stable operational condition. The existence of several fluid phases and solid particles in the dripping ... [more ▼]

The role of molten iron and slag in the dripping zone of a blast furnace is very critical to reach a stable operational condition. The existence of several fluid phases and solid particles in the dripping zone of a blast furnace, makes the newly developed eXteneded Discrete Element Method (XDEM) as an Eulerian-Lagrangian approach, suitable to resolve the dripping zone of a blast furnace. In the proposed model, the fluid phases are treated by Computational Fluid Dynamics (CFD) while the solid particles are solved by Discrete Element Method (DEM). These two methods are coupled via momentum, heat and mass exchanges. The main focus of current study is to investigate the influence of packed properties such as porosity and particle diameters, calculated by the XDEM, on the fluid phases for isothermal. In order to present the capability of the XDEM for this application. The validity of the proposed model is demonstrated by comparing model prediction results with the available experimental data. [less ▲]

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See detailPreliminary results of the BIPM Relative Gravity Measurement Campaign during the 8th International Comparison of Absolute Gravimeters (2009)
Jiang, Zihang; Tisserand, L.; Kessler-Schulz, K. U. et al

in Peshekhonov, Vladimir (Ed.) Proceedings of the IAG Symposium on Terrestrial Gravimetry: Static and Mobile Measurements (2011)

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See detailA Preliminary Study on the Automatic Visual based Identification of UAV Pilots from Counter UAVs
Cazzato, Dario; Cimarelli, Claudio UL; Voos, Holger UL

in 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 5: VISAPP, Valletta 27-29 February 2020 (2020, February 27)

Two typical Unmanned Aerial Vehicles (UAV) countermeasures involve the detection and tracking of the UAV position, as well as of the human pilot; they are of critical importance before taking any ... [more ▼]

Two typical Unmanned Aerial Vehicles (UAV) countermeasures involve the detection and tracking of the UAV position, as well as of the human pilot; they are of critical importance before taking any countermeasure, and they already obtained strong attention from national security agencies in different countries. Recent advances in computer vision and artificial intelligence are already proposing many visual detection systems from an operating UAV, but they do not focus on the problem of the detection of the pilot of another approaching unauthorized UAV. In this work, a first attempt of proposing a full autonomous pipeline to process images from a flying UAV to detect the pilot of an unauthorized UAV entering a no-fly zone is introduced. A challenging video sequence has been created flying with a UAV in an urban scenario and it has been used for this preliminary evaluation. Experiments show very encouraging results in terms of recognition, and a complete dataset to evaluate artificial intelligence-based solution will be prepared. [less ▲]

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See detailA PRELIMINARY STUDY ON THE STABILITY OF PARTICLE LADEN JETS THROUGH A FULLY COUPLED CFD-DEM SOLVER
Peters, Bernhard UL; Pozzetti, Gabriele UL

Poster (2016, May 22)

Jets are widely used in engineering applications. In material machinery, hydro-transportation systems as well as in chemical industry it is common to deal with a dispersed solid phase interacting with the ... [more ▼]

Jets are widely used in engineering applications. In material machinery, hydro-transportation systems as well as in chemical industry it is common to deal with a dispersed solid phase interacting with the jet, and therefore creating a so-called slurry-jet or particle-laden jet. The stability of a jet is a key issue for many of these processes, still the underlying physics of this turbulent multiphase flow is highly complicated. Conventional CFD approaches have been proven satisfying for the study of the stability of two-phase jets. When a solid dispersed phase is present in the system, the stability problem gets more complicated and dependent on the solid phase dynamic. A possible solution for the problem is to extend the CFD solver capability through a correct coupling with a DEM solver. In this work a preliminary investigation on the potentialities of this kind of approach is presented and compared with a pure CFD approach. In particular the effect of the presence of differently sized particles in the jet is outlined and the influence of particle properties and concentration is investigated. Finally some considerations about the computational cost of different methods are proposed. The fluid phases are solved through an Eulerian finite volume (FV) multiphase solver based on the OpenFoam® libraries, and coupled with the XDEM code in order to treat the dispersed phase in a Lagrangian way. [less ▲]

Detailed reference viewed: 156 (19 UL)
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See detail«Premessa»
Roelens, Nathalie UL

in Piccole finizioni con importanza. Valori della narrativa italiana contemporanea (1993)

Detailed reference viewed: 19 (1 UL)
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See detailPremier bilan d'un débat national
Pauly, Michel UL

in Vincent ARTUSO, La « question juive » au Luxembourg (1933-1941). L’Etat luxembourgeois face aux persécutions antisémites nazies. Rapport final (2015)

Avant-propos dressant un bilan provisoire du débat autour du 'rapport Artuso' sur l'attitude de la Commission administrative de 1940 la question juive au Luxembourg

Detailed reference viewed: 36 (2 UL)
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See detailPremier et deuxième espaces de cohomologie de l'algèbre de Lie des opérateurs différentiels sur une variété à coefficients dans les fonctions
Poncin, Norbert UL

in Bulletin de la Société Royale des Sciences de Liège (1998), 67(6), 291--337

Detailed reference viewed: 43 (4 UL)
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See detailPremier regard sur l’éducation familiale au Luxembourg et les relations école-famille.
Poncelet, Débora UL; Kerger, Sylvie UL; Dierendonck, Christophe UL

in catarsi, enzo; pourtois, jp (Eds.) Les formations et les recherches en éducation familiale (2011)

Detailed reference viewed: 49 (3 UL)
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See detailLes premières élections sociales en 1903: une rupture historique
Scuto, Denis UL

Article for general public (2019)

Detailed reference viewed: 66 (2 UL)
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See detailPremiers espaces de la cohomologie de l'algèbre de Lie graduée de Nijenhuis-Richardson de l'espace des fonctions d'une variété
Poncin, Norbert UL

in Bulletin of the Belgian Mathematical Society Simon Stevin (2001), 8(1), 141-146

Detailed reference viewed: 61 (1 UL)
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See detailPremiers pas dans le métier d'enseignant: quand la langue s'en mêle
de Saint-Georges, Ingrid UL

E-print/Working paper (2017)

Detailed reference viewed: 87 (2 UL)
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See detailPremise Independence in Judgment Aggregation
Pigozzi, Gabriella UL; van der Torre, Leon UL

in Formal Models of Belief Change in Rational Agents (2007)

Judgment aggregation studies how agent opinions on logically interconnected propositions can be mapped into a collective judgment on the same propositions, and is plagued by impossibility results. In this ... [more ▼]

Judgment aggregation studies how agent opinions on logically interconnected propositions can be mapped into a collective judgment on the same propositions, and is plagued by impossibility results. In this paper we study the central notion of independence in these impossibility results. First, we argue that the distinction between the premises and conclusions play an important role in the benchmark examples of judgment aggregation. Second, we consider the notion of independence in judgment aggregation frameworks, and we observe that the distinction between premises and conclusion is not taken into account. Third, based on our analysis, we introduce independence assumptions that distinguish premises from conclusion. We show that, by introducing new operators that satisfy our independence assumptions, the problematic impossibility results no longer hold. [less ▲]

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See detailPrenatal Economic Shocks and Birth Outcomes in UK Cohort Data
Clark, Andrew; d'ambrosio, Conchita UL; Rohde, Nicholas

in Economics and Human Biology (in press)

We consider the effects of major prenatal economic shocks experienced by mothers on two indicators of newborn-infant health, birth weight and head circumference, using detailed microdata from the UK ... [more ▼]

We consider the effects of major prenatal economic shocks experienced by mothers on two indicators of newborn-infant health, birth weight and head circumference, using detailed microdata from the UK ALSPAC survey. Controlling for physiological and socioeconomic factors, an economic shock in the first 18 weeks of gestation lowers birth weight by 40-70 grams and head circumference by 2-3mm. We find evidence of transmission via poorer maternal health due to absolute material deprivation and tobacco and alcohol consumption, but not for the endocrinological effects of increased psychosocial anxiety. The fragile-male hypothesis holds for birth weight but not for head circumference, as predicted by recent theories on gender differences in prenatal development. [less ▲]

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