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See detailEOL-OS, Software dedicated to the optimisation of the support structure of offshore wind turbines
Georgescu, A.G.; Thiry, A.; Rigo, Philippe ULiege

in Ovid Farhi (Ed.) Third International Scientific Congress (2012, October 04)

Steel is currently the most common material used in the construction of offshore wind turbines. With towers reaching new heights of over 100 m, and with production assembly and transportations constraints ... [more ▼]

Steel is currently the most common material used in the construction of offshore wind turbines. With towers reaching new heights of over 100 m, and with production assembly and transportations constraints being more and more heavier, it became obvious that for an offshore wind turbine to become cost effective, the total amount of steel used needed to be minimal. The main objective of EOL-OS is to provide a competitive analysis tool and to perform structural optimizations of the tower of a fixed offshore and onshore wind turbine, in order to obtain either the least cost or the least weight. Thru the use of EOL-OS a wind turbine designer or steel manufacturer can determine what is the best solution in terms of cost or weight, in order yield the maximum benefit from a wind turbine. [less ▲]

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See detailUsing Proper Orthogonal Decomposition Methods for Comparing CFD Results to Experimental Measurements
Andrianne, Thomas ULiege; Guissart, Amandine ULiege; Terrapon, Vincent ULiege et al

in Proceedings of the 5th Symposium on Integrating CFD and Experiments in Aerodynamics (Integration 2012) (2012, October 03)

This work presents a method for quantitative comparison of numerical results to experimental measurements. It is based on the concept of Proper Orthogonal Decomposition. This technique is selected in ... [more ▼]

This work presents a method for quantitative comparison of numerical results to experimental measurements. It is based on the concept of Proper Orthogonal Decomposition. This technique is selected in order to compare the unsteady aerodynamic flows around static and oscillating bodies obtained from wind tunnel testing and numerical simulations. Two dimensional Time-resolved Particle Image Velocimetry measurements are carried out on the upper surface a 4:1 rectangular cylinder. Simulations are performed using unsteady Reynolds-Averaged Navier-Stokes and an unsteady Discrete Vortex Method. It is demonstrated that the proposed technique is a good preliminary step for comparing the main characteristics of unsteady aerodynamic data. [less ▲]

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See detailRapport du groupe d'experts chargé de réfléchir sur l'évolution des relations entre les pouvoirs publiques et les communautés religieuses ou philosophiques au Grand-Duché de Luxembourg
Messner, Francis; Husson, Jean-François ULiege; Sägesser, Caroline

Report (2012)

This report reviews the current relations between public authorities and religious or philosophical communities in Luxemburg, considering historical, legal and sociological aspects as well as a detailed ... [more ▼]

This report reviews the current relations between public authorities and religious or philosophical communities in Luxemburg, considering historical, legal and sociological aspects as well as a detailed analysis from the various financing schemes. The second part of the report considers possible developments, in termes of principles as well as alternatives or reforms of the current system. [less ▲]

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See detailSubstrats cérébraux des processus moteurs automatiques et inconscients
D'Ostilio, Kevin ULiege

Doctoral thesis (2012)

Les mécanismes à la base des troubles du contrôle moteur sont encore peu compris. L'étude des patients akinétiques et hyperkinétiques soulignent l’importance physiopathologique du cortex (pré)moteur et ... [more ▼]

Les mécanismes à la base des troubles du contrôle moteur sont encore peu compris. L'étude des patients akinétiques et hyperkinétiques soulignent l’importance physiopathologique du cortex (pré)moteur et des noyaux gris centraux. Ces études ne nous permettent cependant pas de déterminer le rôle respectif de ces différentes régions. Les modèles actuels suggèrent que certains mouvements anormaux résultent d’une perturbation de l’équilibre entre les processus de facilitation et d’inhibition des programmes moteurs secondaire à une altération de l’intégration perceptuo-motrice. Dans le cadre de ce travail, nous avons utilisé une tâche d'amorçage subliminale afin d'examiner les corrélats cérébraux de ces processus chez des sujets jeunes ainsi que chez des patients atteints de la maladie de Parkinson. Nous avons montré que l'activation/facilitation et l'inhibition automatiques et inconscientes étaient sous-tendues par un réseau moteur cortico-sous-cortical. Ce résultat a été ensuite confirmé au moyen d'une approche lésionnelle par l'étude de patients parkinsoniens. Nous avons également mis en évidence une dépendance cingulo-préfrontale dans la détection /résolution de conflit inconscient. Ces résultats remettent en cause les théories traditionnelles considérant la conscience et le contrôle cognitif comme étant étroitement reliés et contribue à une meilleure compréhension de la physiopathologie des mouvements anormaux. [less ▲]

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See detailEl traductor, ¿otro escritor de la literatura nacional?
Willson, Patricia ULiege

Conference given outside the academic context (2012)

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See detailLe jugement du goût, du gustatif à l’esthétique
Von Hoffmann, Viktoria ULiege

Conference (2012, October 02)

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See detailDouble-scale modelling of the hydro-mechanical behaviour of clay rocks
van den Eijnden, Abraham Pieter ULiege; Bésuelle, Pierre; Chambon, René

Scientific conference (2012, October 02)

The work to be presented concerns the modelling of hydro-mechanical behaviour of clayey rocks as encountered in the field of underground nuclear waste storage. For the modelling a two scale finite element ... [more ▼]

The work to be presented concerns the modelling of hydro-mechanical behaviour of clayey rocks as encountered in the field of underground nuclear waste storage. For the modelling a two scale finite element (FE2) approach is envisioned, containing a macro-scale model of a poro mechanical continuous medium and a micro-scale model of a representative elementary volume (REV) containing a (discontinuous) microstructure of solid grains and pore space. The difference with classical finite element modelling is the absence of a direct constitutive relation on the macro scale. Instead, for each integration point on the macro level, a REV is modelled on the micro level to numerically derive this relation to be used on the macro level. In this way the constitutive behaviour at the macro-scale is dictated by the global response of the REV that serves as its (numerical) constitutive relation. This constitutive relation can be found by homogenization of the REV. In continuation of the work of Frey [1], [2], a finite element model is developed to model the constitutive relation for the macro level by means of a REV with a microstructure. The microstructure contains elastic, impermeable grains with interface elements to model the intergranular contacts. These interface elements are used for both fluid flow and intergranular cohesive and frictional forces. The hydraulic and mechanical part are coupled by the connectivity of the interfaces itself depending on an equivalent opening between the opposite sides of the interface elements (the grain boundaries). The representation of an actual opening by these interface elements allows deformation and damage to concentrate in the interfaces. Intergranular cohesive forces are modelled by damage laws for normal and tangential displacements of opposite interface sides. By defining different grain geometries and arrangements, different macroscopic responses can be obtained. In this way, complex macroscopic constitutive behaviour can be modelled with very simple interface damage models at the micro level. However, the use of the FE2 method is computationally expensive. The derivation of the consistent tangent stiffness matrix of the global response of the REV is part of this computational expense. In order to overcome a significant part of this computational expense of the method, the idea is to use analytical homogenization to derive the tangent stiffness matrix from the REV instead of more straightforward numerical homogenization. A particular challenge in the application of analytical condensation is to overcome the discontinuous nature of the interface elements that are caused by cohesive forces over the interface opening. Once this is obtained, condensation of the finite element system of equations and the application of the boundary conditions can lead to an analytic solution for the consistent tangent stiffness matrix at the macro scale. For a continuous, solid phase media this condensation method for homogenization is described in [3]. It is the goal to add the coupling with the fluid phase and the cohesive forces to this method of analytic homogenization. In addition to the homogenization, the more straightforward approach to reduce calculation time by parallelization is foreseen. References: [1] Frey, J. (2010), Modélisation multi-échelle de l’endommagement hydroméchanique des roches argileuses, PhD Thesis, INP Grenoble, Université de Grenoble [2] Frey, J; Chambon, R; Dascalu C; (2012), A two scale poromechanical model for cohesive rocks accepted for publication, Acta Geotechnica [3] Kouznetsova, V; Brekelmans, W.A.M; Braaijens, F.P.T (2001) An approach to micro-macro modeling of heterogeneous materials, Computational Geomechanics 27, 37-48 [less ▲]

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See detailPlanification successorale : les avancées du Règlement européen relatif aux successions
Wautelet, Patrick ULiege

Conference (2012, October 02)

Cette présentation a pour objectif de mettre en exergue les grands principes retenus par le Règlement européen relatif aux successions. Pour ce faire, les règles européennes sont contrastées avec le cadre ... [more ▼]

Cette présentation a pour objectif de mettre en exergue les grands principes retenus par le Règlement européen relatif aux successions. Pour ce faire, les règles européennes sont contrastées avec le cadre juridique actuel. [less ▲]

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See detailHabitat diversity of the Multicolored Asian ladybeetle Harmonia axyridis Pallas (Coleoptera: Coccinellidae) in agricultural and arboreal ecosystems: a review
Vandereycken, Axel ULiege; Durieux, Delphine ULiege; Joie, Emilie ULiege et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2012), 16(4), 553-563

The Multicolored Asian ladybeetle, Harmonia axyridis (Pallas), native to Asia, is an invasive species in many European and American countries. Initially introduced as a biological control agent against ... [more ▼]

The Multicolored Asian ladybeetle, Harmonia axyridis (Pallas), native to Asia, is an invasive species in many European and American countries. Initially introduced as a biological control agent against aphids and coccids in greenhouses, this alien species rapidly invaded many habitats such as forests, meadows, wetlands, and agricultural crops. This paper reviews the habitats (forests, crops, herbs, gardens and orchards) where H. axyridis has been observed, either during insect samplings or as part of Integrated Pest Management (IPM) programs. Studies have referenced H. axyridis on 106 plant taxa (35 arboreal species, 21 crop species, 27 herbaceous species, 11 ornamental species, and 12 orchard species) and have identified 89 plant- prey relationships (34 arboreal species, 16 crop species, 13 herbaceous species, 10 ornamental species, and 16 orchard species) in different countries. Harmonia axyridis is more abundant in forest areas, principally on Acer, Salix, Tilia and Quercus, than in agroecosystems. Some plant species, such as Urtica dioica L., which surround crops, contain large numbers of H. axyridis and could constitute important reserves of this alien species in advance of aphid invasions into crops. This review highlights the polyphagy and eurytopic aspect of H. axyridis. [less ▲]

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See detailLe terrorisme à motif religieux en Turquie : Recrutement, profils et motivations des membres du Hizbullah turc
Gülver, Murat ULiege

Doctoral thesis (2012)

Depuis plus de cinquante ans, la Turquie a été la victime permanente d’actes terroristes aux multiples motivations. Ces dernières années, le terrorisme à motif religieux y a connu une montée en puissance ... [more ▼]

Depuis plus de cinquante ans, la Turquie a été la victime permanente d’actes terroristes aux multiples motivations. Ces dernières années, le terrorisme à motif religieux y a connu une montée en puissance. Plus de dix organisations terroristes, se basant sur une idéologie religieuse, ce sont organisées sur le territoire turc dans le but de changer le système politique et pour fonder un État islamique. Dans cette recherche, nous avons examiné le cas du Hizbullah turc, en tant que la plus grande et la plus violente organisation terroriste à motif religieux en Turquie. Cette étude a exploré d’abord les méthodes de recrutement du Hizbullah, ensuite les profils de ses militants et enfin les motivations individuelles et les facteurs, qui se trouvent à la base de la radicalisation religieuse en Turquie. Pour ce faire, l’examen quantitatif et qualitatif de données originales comble les principales lacunes dans la recherche sur le terrorisme à motif religieux et donne des indications pour de futures recherches criminologiques et de politiques de sécurité préventives. Dans cette étude, pour examiner et comprendre le recrutement, les profils et les motivations des membres du Hizbullah, nous avons utilisé essentiellement deux sources : les autobiographies des militants eux-mêmes et les entretiens semi-structurés avec des policiers spécialistes du terrorisme à motif religieuse, ainsi que des desservants du culte islamique, qui ont une expérience dans les régions où le Hizbullah était actif. Cette recherche entend apporter une contribution significative à la compréhension des motivations individuelles des militants du Hizbullah, à l’identification des caractéristiques des membres, et à la définition des méthodes de recrutement de l’organisation. Elle propose en outre de nombreuses informations aux organisations de sécurité pour la lutte antiterroriste. [less ▲]

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See detailAssessment of non-genetic parameters of the racing performances of Arabian and Thoroughbred horses in Algeria
Tennah, Safia ULiege; Kafidi, Nacer; Antoine-Moussiaux, Nicolas ULiege et al

in African Journal of Biotechnology (2012)

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See detailSimple and Automatic Closed Grinding and Extraction System
Fischer, Christophe ULiege; Lognay, Georges ULiege

in Journal of Chemical Education (2012)

This article describes a simple, automatic, and closed grinding system for small samples using common laboratory equipment that is particularly useful for air-sensitive samples or volatile compounds ... [more ▼]

This article describes a simple, automatic, and closed grinding system for small samples using common laboratory equipment that is particularly useful for air-sensitive samples or volatile compounds analyses. [less ▲]

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See detailis gender a preoccupation of GGP survey ?
Gavray, Claire ULiege; Cardelli, Rebecca ULiege

Scientific conference (2012, October 02)

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See detailGBS SCREENING Belgium: current and future guidelines
MELIN, Pierrette ULiege

Conference (2012, October 02)

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See detailSimulating the growth of supra-glacial lakes at the western margin of the Greenland ice sheet
Leeson, A.; Shepherd, A.; Palmer, S. et al

in Cryosphere (The) (2012), 6

We present a new method of modelling the growth of supraglacial lakes at the western margin of the Greenland ice sheet, based on routing runoff estimated by a regional climate model across a digital ... [more ▼]

We present a new method of modelling the growth of supraglacial lakes at the western margin of the Greenland ice sheet, based on routing runoff estimated by a regional climate model across a digital elevation model (DEM) of the ice sheet surface. Using data acquired during the 2003 melt season, we demonstrate that the model is 19 times more likely to correctly predict the presence (or absence) of lakes than it is to make incorrect predictions, within an elevation range of 1100 to 1700 metres above sea level (m a.s.l.), when compared with MODIS satellite imagery. Of the 66% of observed lake locations which the model correctly reproduces, the simulated lake onset day is found to be correlated with that observed with a Pearson correlation coefficient of 0.76. Our model accurately simulates maximum cumulative lake area with only a 1.5% overestimate. However, because our model does not simulate processes leading to lake stagnation or decay, such as refreezing or drainage, at present we do not simulate absolute daily lake area. We find that the maximum potential lake-covered ice sheet area is limited by topography to 6.4%. We estimate that this corresponds to a volume of 1.49 km3, 12% of the runoff produced in 2003. This can be taken as an upper bound given uncertainty in the DEM. This study has proved a good first step towards capturing the variability of supraglacial lake evolution with a numerical model. These initial results are promising and suggest that the model is a useful tool for use in analysing the behaviour of supraglacial lakes on the Greenland ice sheet in the present day and potentially beyond. [less ▲]

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See detailAn upper limit for the water outgassing rate of the main-belt comet 176P/LINEAR observed with Herschel/HIFI
de Val-Borro, M.; Rezac, L.; Hartogh, P. et al

in Astronomy and Astrophysics (2012), 546

176P/LINEAR is a member of the new cometary class known as main-belt comets (MBCs). It displayed cometary activity shortly during its 2005 perihelion passage, which may be driven by the sublimation of ... [more ▼]

176P/LINEAR is a member of the new cometary class known as main-belt comets (MBCs). It displayed cometary activity shortly during its 2005 perihelion passage, which may be driven by the sublimation of subsurface ices. We have therefore searched for emission of the H[SUB]2[/SUB]O 1[SUB]10[/SUB]-1[SUB]01[/SUB] ground state rotational line at 557 GHz toward 176P/LINEAR with the Heterodyne Instrument for the Far Infrared (HIFI) onboard the Herschel Space Observatory on UT 8.78 August 2011, about 40 days after its most recent perihelion passage, when the object was at a heliocentric distance of 2.58 AU. No H[SUB]2[/SUB]O line emission was detected in our observations, from which we derive sensitive 3-σ upper limits for the water production rate and column density of <4 × 10[SUP]25[/SUP] mol s[SUP]-1[/SUP] and of <3 × 10[SUP]10[/SUP] cm[SUP]-2[/SUP], respectively. From the peak brightness measured during the object's active period in 2005, this upper limit is lower than predicted by the relation between production rates and visual magnitudes observed for a sample of comets at this heliocentric distance. Thus, 176P/LINEAR was most likely less active at the time of our observation than during its previous perihelion passage. The retrieved upper limit is lower than most values derived for the H[SUB]2[/SUB]O production rate from the spectroscopic search for CN emission in MBCs. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. [less ▲]

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See detailPropriétés physicochimiques et électrochimiques de catalyseurs Pt/xérogel de carbone synthétisés par la méthode de SEA multiple.
Zubiaur, Anthony ULiege; Chatenet, M.; Maillard, F. et al

Conference (2012, October 01)

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See detailFonctionnalisation surfacique de poudre de carbone pour greffer des nanoparticules métalliques par plasma.
Laurent-Brocq, M.; Job, Nathalie ULiege; Pireaux, J.-J.

Conference (2012, October 01)

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See detailPréparation de couches catalytiques pour PEMFC à partir de xérogels de carbone.
Deschamps, Fabien ULiege; Traina, Karl; Pirard, Jean-Paul et al

Conference (2012, October 01)

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See detailA hot Uranus transiting the nearby M dwarf GJ 3470. Detected with HARPS velocimetry. Captured in transit with TRAPPIST photometry
Bonfils, X.; Gillon, Michaël ULiege; Udry, S. et al

in Astronomy and Astrophysics (2012), 546

We report on the discovery of GJ 3470 b, a transiting hot Uranus of mass m[SUB]p[/SUB] = 14.0 ± 1.8 M[SUB]⊕[/SUB], radius R[SUB]p[/SUB] = 4.2 ± 0.6 R[SUB]⊕[/SUB] and period P = 3.3371 ± 0.0002 day. Its ... [more ▼]

We report on the discovery of GJ 3470 b, a transiting hot Uranus of mass m[SUB]p[/SUB] = 14.0 ± 1.8 M[SUB]⊕[/SUB], radius R[SUB]p[/SUB] = 4.2 ± 0.6 R[SUB]⊕[/SUB] and period P = 3.3371 ± 0.0002 day. Its host star is a nearby (d = 25.2 ± 2.9 pc) M1.5 dwarf of mass M[SUB]⋆[/SUB] = 0.54 ± 0.07 M[SUB]&sun;[/SUB] and radius R[SUB]⋆[/SUB] = 0.50 ± 0.06 R[SUB]&sun;[/SUB]. The detection was made during a radial-velocity campaign with Harps that focused on the search for short-period planets orbiting M dwarfs. Once the planet was discovered and the transit-search window narrowed to about 10% of an orbital period, a photometric search started with Trappist and quickly detected the ingress of the planet. Additional observations with Trappist, EulerCam and Nites definitely confirmed the transiting nature of GJ 3470b and allowed the determination of its true mass and radius. The star's visible or infrared brightness (V[SUP]mag[/SUP] = 12.3, K[SUP]mag[/SUP] = 8.0), together with a large eclipse depth D = 0.57 ± 0.05%, ranks GJ 3470 b among the most suitable planets for follow-up characterizations. Based on observations made with the HARPS instrument on the ESO 3.6 m telescope under the program IDs 183.C-0437 at Cerro La Silla (Chile).Our radial-velocity and photometric time series are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/546/A27">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/546/A27</A> [less ▲]

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