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See detailModelling of the wave propagation, the coastal currents and the induced topographic changes
Fraikin, Catherine; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in Proceedings of the 9th International Symposium on River Sedimentation (2004)

This paper models the sea bottom evolution. This model is built up on three main parts. The first one describes the wave propagation, taking simultaneously into account the refraction, the diffraction and ... [more ▼]

This paper models the sea bottom evolution. This model is built up on three main parts. The first one describes the wave propagation, taking simultaneously into account the refraction, the diffraction and the reflection but also the energy dissipation caused by wave breaking. This model is solved by the numerical method of the finite volumes, using an iterative resolution (the GMRES method). Several validations of this model have been carried out on many examples such as harbors of various geometries and depths, beaches,… The wave induced currents are computed in the second part based on the concept of the radiation stresses describing the excess of the flux momentum caused by the waves. A model based on the complete Navier-Stokes equations integrated on the depth and associated with appropriated forcing and friction terms is used. This model is computed as an update of WOLF software (HACH, ULg) and is applied to some examples such as beaches with or without coastal structures. Finally, the third part is about the sediment transport. It exhibits the topographic modifications of the coastal sea bottom caused by the waves and their currents. A loop execution of these three models ends this work. It gives us an operational tool to describe the topographic evolution of the coastal areas caused by the incident waves, the induced currents and then the resulting sediment transport, fulfilling the objectives of this paper. [less ▲]

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See detailDéveloppement : la course à la compétitivité
Lebailly, Philippe ULg

Article for general public (2004)

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See detailDe l’“universel reportage” au poème univers : l’hybridation mallarméenne du livre et du journal
Durand, Pascal ULg

in Thérenty, M.-E.; Vaillant, A. (Eds.) Plumes et presse. Journalisme et littérature au XIXe siècle (2004)

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See detailEffects of a micro hydroelectric power plant upon population abundance, mobility and reproduction behaviour of European grayling T. thymallus and brown trout S. trutta in a salmonid river
Ovidio, Michaël ULg; Paquer, Frédéric ULg; Capra, Hervé et al

in Garcia de Jalon, Diego; Vizcaino Martinez, Pilar (Eds.) International Symposium on Ecohydraulics. Aquatic habitat: Analysis & Restoration (2004)

This study examines the potential effects of a new micro hydroelectric power plant (MHPP) on the behaviour (habitat use, movements) and population abundance of European grayling (T. thymallus) and brown ... [more ▼]

This study examines the potential effects of a new micro hydroelectric power plant (MHPP) on the behaviour (habitat use, movements) and population abundance of European grayling (T. thymallus) and brown trout (S. trutta) in the Lhomme (Belgian Ardennes). Thirteen grayling and five brown trout were captured before their spawning period and were manually radio-tracked up to 6 times a week. Population density and biomass were estimated into two different sampling sectors with electric fishing, before and after the MHPP started up. The mobility patterns of grayling and trout in the reach of the river Lhomme influenced by the MHPP strongly contrasted with results obtained in an undisturbed river of the same type in the Belgian Ardennes. Movements were mostly restricted and rarely increased during the spawning period. Spawning took place, but was disturbed by hydropeakings. The population biomass of grayling and trout decreased by 61 % and 23 % respectively, five months after the start-up of the MHPP exploitation. [less ▲]

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See detailL’intégration architecturale et urbaine des vestiges archéologiques
Teller, Jacques ULg; Lefert, S.

in Actes du Colloque International APPEAR (2004)

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See detailLes carbonates de terres rares de Bertrix, Belgique.
Hatert, Frédéric ULg

in Bulletin de la Société Royale des Sciences de Liège (2004), 73(1), 27-34

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See detailCarminite et kintoreite de Hourt, Massif de Stavelot, Belgique.
Hatert, Frédéric ULg; Lefèvre, Pierre

in Bulletin de la Société Royale des Sciences de Liège (2004)

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See detailA study of the quantitative content of thiamine triphosphate in different biological objects by high-performance liquid chromatography
Makarchikov, Alexander F; Bettendorff, Lucien ULg

in News of Biomedical Sciences (2004), 2

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See detailPurification and characterization of glutathione S-transferases from two syrphid flies (Syrphus ribesii and Myathropa florae).
Vanhaelen, Nicolas; Francis, Frédéric ULg; Haubruge, Eric ULg

in Comparative Biochemistry & Physiology Part B (2004), 137(1), 95-100

Glutathione S-transferases (GST) play an important role in the detoxification of many substances including organic pollutants and plant secondary metabolites. We compared the GST of two syrphid species ... [more ▼]

Glutathione S-transferases (GST) play an important role in the detoxification of many substances including organic pollutants and plant secondary metabolites. We compared the GST of two syrphid species, the aphidophagous Syrphus ribesii and the saprophagous Myathropa florea to assess the relation between feeding type and GST patterns. Differences between the GST of the hoverfly species were observed after purification by affinity chromatography, SDS-PAGE and kinetic studies. While the specific activities of the purified enzymes were different, the purification yields were similar. The variation in specific activities was related to the presence of different isoenzymes in both syrphid species by SDS-PAGE. While two bands of 24 and 32 kDa were observed for M. florea, one more band of 26 kDa was present in S. ribesii. When a range of substrate and glutathione concentrations was tested, differences in Km and Vmax between the glutathione S-transferases from both hoverfly species were also observed. These results are discussed in terms of adaptations to the feeding habit and the habitat of the two syrphid species. [less ▲]

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See detailLarge-distance effects on spin observables at RHIC
Selyugin, Oleg V; Cudell, Jean-René ULg; Predazzi, E.

in Aulenbacher, K.; Bradamante, F.; Bressan, A. (Eds.) et al 16th International Spin Physics Symposium (SPIN 2004) (2004)

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See detailSaturation and non-linear effects in diffractive processes
Selyugin, Oleg V; Cudell, Jean-René ULg

in Burdik, C. (Ed.) 11th International Conference On Symmetry Methods In Physics (SYMPHYS-11) (2004)

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See detailA simple model for generalised parton distributions of the pion
Lansberg, Jean-Philippe ULg; Bissey, F.; Cudell, Jean-René ULg et al

in Bruncko, D.; Ferencei, J.; Strizenec, P. (Eds.) 12th International Workshop On Deep Inelastic Scattering (DIS 2004) (2004)

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See detailIntegral and derivative dispersion relations, analysis of the forward scattering data
Martynov, E.; Cudell, Jean-René ULg; Selyugin, Oleg V

in Eur. Phys. J. (2004), C33

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See detailFinite element computation of electromechanical micro-switches and micro-pump actuators
Lejeune, Jean-Michel; Rochus, Véronique ULg; Golinval, Jean-Claude ULg

Conference given outside the academic context (2004)

a new methodology to model the electromechanical behavior of microscale system components is presented. The original approach proposed in this paper is based on a unified FE formulation of the strong ... [more ▼]

a new methodology to model the electromechanical behavior of microscale system components is presented. The original approach proposed in this paper is based on a unified FE formulation of the strong electromechanical interaction problem, in which both the electric and the mechanical fields are considered simultaneously. To this aim, finite elements based on the Mindlin shell theory are implemented. In order to illustrate the proposed methodology, numerical results are presented on the modelling and simulation of microscale electromechanical switches and microscale pump actuators. [less ▲]

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See detailTransposition de la Directive Nitrate (CE) en Région wallonne : azote potentiellemnt lessivable de référence pour les sols cultivés en Région wallonne
Vandenberghe, Christophe ULg; Marcoen, Jean Marie ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2004), 8

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See detailSeismic Design and Performance of Composite Frames
Thermou, G.; Elnashai, A. S.; Plumier, André ULg

in Journal of Constructional Steel Research (2004), (60),

In this study, the seismic design and performance of composite steel-concrete frames are studied. The new Eurocode 4 and Eurocode 8, which are in a preliminary stage at the moment, are employed for the ... [more ▼]

In this study, the seismic design and performance of composite steel-concrete frames are studied. The new Eurocode 4 and Eurocode 8, which are in a preliminary stage at the moment, are employed for the design of six composite steel-concrete frames. The deficiencies of the codes and the clauses that cause difficulties to the designer are discussed. The inelastic static pushover analysis is employed for obtaining the response of the frames and the overstrength factors. The evaluation of the response modification factor takes place by performing incremental time-history analysis up to the satisfaction of the yield and collapse limit states in order to investigate the conservatism of the code. The last purpose of this study is to investigate if elastically designed structures can behave in a dissipative mode. [less ▲]

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See detailCaractérisation écologique de la pollinisation des Iris Oncocycles endémiques du Liban
Monty, Arnaud ULg

Master's dissertation (2004)

Les Iris Oncocycles libanais sont des espèces montagnardes, endémiques et menacées. Dans un cadre général de mise au point d’une stratégie de conservation, le système reproducteur et le système de ... [more ▼]

Les Iris Oncocycles libanais sont des espèces montagnardes, endémiques et menacées. Dans un cadre général de mise au point d’une stratégie de conservation, le système reproducteur et le système de pollinisation de ces végétaux ont été caractérisés. L’essentiel des observations a porté sur une espèce type : Iris cedretii Dinsmore ex Chaudhary, dont deux populations distinctes ont été répertoriées. Des observations complémentaires ont été faites sur une population d’Iris sofarana subsp. kasruwana Dinsmore ex Chaudhary. Les Oncocycles libanais sont des végétaux allogames stricts, et la fleur est réceptive pendant cinq jours, au plus. Des séances d’observation et de récoltes entomologiques ont été effectuées de jour, par différentes conditions climatiques. Elles ont mis en évidence le rôle des abeilles mâles du genre Xylocopa dans la pollinisation, et le faible taux de visite global des Iris. Des séances d’échantillonnage au sein des fleurs, de jour et de nuit, ont permis de jauger l’importance du phénomène de refuge. Quantitativement, le refuge concerne surtout les abeilles mâles du genre Eucera, mais une faune diversifiée trouve abri dans les fleurs. Afin de comprendre plus précisément le phénomène, des observations matinales et des mesures de températures, notamment intra-florales, ont été menées. Des quantifications de pollen sur les insectes ont permis de valider le rôle de ceux-ci comme pollinisateurs. Les Iris Oncocycles libanais ont un système de pollinisation double. Il est basé, d’une part, sur les transfert polliniques dus au va-et-vient des réfugiés. D’autre part, des déplacements de pollen sont assurés par les Xylocopes, apparemment attirés au sein du tube floral par une tromperie sexuelle. Cette duperie fait intervenir la tache « onco », sur le labelle, qui est caractéristique de la section Oncocyclus. [less ▲]

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See detailFinite element modelling of ion convection by electrostatic forces
Deliège, Geoffrey ULg; Henrotte, François; Deprez, Wim et al

in IET Science, Measurement & Technology (2004), 151(6), 398-402

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See detailThe eggshell approach for the computation of electromagnetic forces in 2D and 3D
Henrotte, François; Deliège, Geoffrey ULg; Hameyer, Kay

in COMPEL (2004), 23(4), 996-1005

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See detailPlatelet expression of non-functional P2X1delL ion channels in mice reduces arterial thrombosis
Oury, Cécile ULg; Daenens, Kim; Feijge, Marion et al

in Haematologica (2004)

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