References of "Scientific congresses and symposiums"
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See detailDesign and production of bone scaffolds with selective laser melting
Van Bael, Simon; Vandenbroucke, Ben; Kerckhofs, Greet ULg et al

in TMS 2009 138TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND PROPERTIES (2009)

The use of bone scaffolds for treatment of large bone defects could be a solution for many disadvantages which are present with traditional care methods. The success of these scaffolds depends on its ... [more ▼]

The use of bone scaffolds for treatment of large bone defects could be a solution for many disadvantages which are present with traditional care methods. The success of these scaffolds depends on its internal structure and mechanical properties. To be able to conduct a reliable investigation on the effect of these parameters, an efficient production method is required which can produce controlled internal structures. The presented work examines the ability to produce Ti6Al4V bone scaffolds with selective laser melting. The bone scaffolds were produced with a pore size range of 400-900 mu m and beam size 200 mu m. To check the repeatability mechanical and geometrical tests were performed. [less ▲]

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See detailBenefits of thixoforging hot-crack-sensitive aluminium alloys at high solid fraction
Vaneetveld, Grégory ULg; Rassili, Ahmed ULg; Pierret, Jean-Christophe ULg et al

in Proceedings of The 13th Esaform Conference on Material Forming (2010) - semi-solid processing (2009)

Thixoforging is a type of semi-solid metal processing at high solid fraction (0.7<fs<1), which involves the processing of alloys in the semi-solid state. The use of semi-solid material with globular ... [more ▼]

Thixoforging is a type of semi-solid metal processing at high solid fraction (0.7<fs<1), which involves the processing of alloys in the semi-solid state. The use of semi-solid material with globular microstructure helps to decrease forming load. But the introduction of a liquid phase in the material is a source of defects that limit mechanical properties of thixoforged parts. One of these defects is the hot cracking for some hot crack-sensitive wrought aluminium alloys. Hot cracking occurs because of strain and deformation during last step of solidification. This paper shows how thixoforging process helps to lower hot cracking tendency without modification of the alloy composition by decreasing strain and deformation due to shrinkage. Different experimental tests by extrusion of 7075 aluminium alloys are used. [less ▲]

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See detailA coupled two-scale computational approach for quasi-brittle out-of-plane structural failure
Mercatoris, Benoît ULg; Massart, Thierry J.

Conference (2009)

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See detailElectrochromic TiO2, ZrO2 and TiO2-ZrO2 thin films by dip-coating method
Ivanova, T.; Harizanova, A.; Koutzarova, T. et al

in Materials Science & Engineering : B (2009), 165(3), 212-216

Sol-gel processing of TiO2, ZrO2 and mixed Ti/Zr oxide thin films has been studied as application of these coatings in electrochromic devices. Their structural transformations as a function of annealing ... [more ▼]

Sol-gel processing of TiO2, ZrO2 and mixed Ti/Zr oxide thin films has been studied as application of these coatings in electrochromic devices. Their structural transformations as a function of annealing temperatures were analyzed by XRD and FTIR techniques. Electrochromic behavior of the three kind materials was investigated by cyclic voltammetry and the basic electrochromic characteristics were determined. (c) 2009 Elsevier B.V. All rights reserved. [less ▲]

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See detailA Machine Learning Approach for Material Detection in Hyperspectral Images
Marée, Raphaël ULg; Stevens, Benjamin ULg; Geurts, Pierre ULg et al

in Proc. 6th IEEE Workshop on Object Tracking and Classification Beyond and in the Visible Spectrum (OTCBVS-CVPR09) (2009)

In this paper we propose a machine learning approach for the detection of gaseous traces in thermal infra red hyperspectral images. It exploits both spectral and spatial information by extracting subcubes ... [more ▼]

In this paper we propose a machine learning approach for the detection of gaseous traces in thermal infra red hyperspectral images. It exploits both spectral and spatial information by extracting subcubes and by using extremely randomized trees with multiple outputs as a classifier. Promising results are shown on a dataset of more than 60 hypercubes. [less ▲]

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See detailEquivalent mixed model for joint genetic evaluation considering molecular and phenotypic information
Gengler, Nicolas ULg; Colinet, Frédéric ULg

in Journal of Dairy Science (2009), 92(E-suppl.1), 315

Currently efforts are underway to introduce molecular information into genetic evaluation systems. A particular situation is genomic selection however simpler cases exists where major genes are known and ... [more ▼]

Currently efforts are underway to introduce molecular information into genetic evaluation systems. A particular situation is genomic selection however simpler cases exists where major genes are known and used by breeders. A new alternative strategy for the prediction of gene effects and especially their smooth integration into genetic evaluations based on an equivalent method was developed from existing theory. Underlying hypothesis were based on the idea that knowledge of genotypes will not affect overall additive genetic variance but only change expected values of genetic effects for animals with known genotypes. The developed equations were modified to allow that not all animals were genotyped. As the underlying mixed model is open a very large range of models can be used in situations including random regression models, multipletrait, maternal effects and multiple-across-country-evaluation models. Computations involved successive solving of two mixed models, with the use of an linear extrapolation to speed up convergence of gene effects. The method was tested for several known major genes and QTL, e.g. for the mh gene in the dual-purpose Belgian Blue population in Belgium. Modifications of the method could also be developed to be useful in the context of genomic selection. [less ▲]

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See detailEmerging Patterns of Depoliticization and Engagement to Inform the Future of Science and Technology Studies: A Case Study in Nanotechnologies
Thoreau, François ULg

Conference (2009)

In this paper, we address the issue of the future of a particular field of research in social science: Science and Technology Studies (STS). Although this is a very young research field, its history is ... [more ▼]

In this paper, we address the issue of the future of a particular field of research in social science: Science and Technology Studies (STS). Although this is a very young research field, its history is already diverse and its evolutions are fastly moving on. Its rapid expansion and its characteristic feature of crossing disciplinary boundaries are making it an interesting case to study, which takes a particular place in the overall history – and future – of social changes. As we shall indicate, STS have an increasing committment for the resolution of sociotechnical controversies. In this paper, we problematise this particular position by underlying the implicit politics of STS research and how they will shape the future of that particular field. Our approach is threefold. First, we give a brief overview of the history of the field and we point out the main evolutions since the developement of the Social Construction of Technology approach (SCOT) in the 1980s that long influenced the field. By doing so, we underline the epistemological critical tradition that gave the field some of its particularities that we address. We show how this tradition brought important insights of “political” nature within the development of the field. Second, our ambition is to highlight new patterns of evolution of the STS field, emphasizing the trends towards both a greater depoliticisation and a more engaged research. By “depoliticisation”, we intend to analyse the dynamics of institutionalisation of the field which adopts resources and tools to legitimate itself among the social scientific community. By “engaged” research, we will explore the evolutions of the STS field as inherently political. The field does have an implicit statement in favor of changing social order and an increasing willingness to actually influence that social change. In that respect, research projects in STS often have underlying politics, as we shall demonstrate. Third, we give a concrete example of these new patterns occuring, relying on the growing importance of nanotechnologies, both in the STS literature and research projects. We consider this case study to be intertwined with the development of STS as a field of research. In that sense, we stress that nanotechnologies happened to be a powerful tool for legitimation for the STS community. Therefore, we — as STS scholars — suggest instrumentalizing the interest we have in nanotechnologies in order to observe the evolutions of our field of research. Then, nanotechnologies will constitute an interesting ground to perform a test that will show depoliticisation and engagement as patterning the STS field. [less ▲]

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See detailThe use of Macronet resins to recover γ-decalactone produced by Rhodotorula aurantiaca from the culture broth
Alchihab, Mohamed ULg; Destain, Jacqueline ULg; Aguedo, Mario ULg et al

Poster (2009)

The objective of this study was to recover the γ-decalactone produced by R. aurantiaca from the culture broth using three Macronet resins (MN-100, MN-102 and MN-202).

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See detailSemiotic artefacts, space and community: A case study on pinhole.
Decortis, Françoise ULg; Lentini, Laura ULg

in Proceedings of the 7th international conference on Interaction design and children (2009)

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See detailProjet ERRUISSOL ou la cartographie des zones à risque de ruissellement et d’érosion en Région wallonne (Belgique)
Demarcin, Pierre ULg; Smoos, Augustin; Dautrebande, Sylvia et al

in Schwartz, Dominique (Ed.) Actes des 10èmes Journées d'étude des sols (2009)

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See detailLa poikilia des offrandes et le souci de les comprendre. Bilan d’une rencontre
Pirenne-Delforge, Vinciane ULg

in Prêtre, Clarisse (Ed.) , in C. Prêtre (éd.), Le donateur, l’offrande et la déesse. Systèmes votifs dans les sanctuaires de déesses du monde grec. Actes du 31e colloque international organisé par l’UMR HALMA-IPEL (Université Charles-de-Gaulle/Lille 3, 13-15 décembre 2007) (2009)

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See detailProspects for Near-infrared Characterisation of Hot Jupiters with the VLTI Spectro-imager (VSI)
Renard, Stéphanie; Absil, Olivier ULg; Berger, Jean-Philippe et al

in Moorwood, A. (Ed.) Science with the VLT in the ELT Era (2009)

Since the discovery of the first exoplanet around 51 Pegasi, the study of planetary systems receives an increasing attention, with the development and test of more and more detection techniques. Among the ... [more ▼]

Since the discovery of the first exoplanet around 51 Pegasi, the study of planetary systems receives an increasing attention, with the development and test of more and more detection techniques. Among the direct detection techniques, interferometry is one of the most promising for the near future. It already provides the required angular resolution, but the dynamic range needs to be improved. The detection and characterisation of extrasolar planets is one of the main science cases of the 2nd generation VLTI Spectro-Imager instrument (VSI). The goal of this work is to study the feasibility of obtaining near-infrared spectra of bright extrasolar giant planets (EGP) with VSI. [less ▲]

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See detailRéponse à Harm Pinkster: Relatieve bijzinnen in het Latijn
Longrée, Dominique ULg

Conference (2009)

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See detailExperimental investigation of flow and deposit patterns in rectangular shallow reservoirs: preliminary analysis
Dufresne, Matthieu ULg; Dewals, Benjamin ULg; Erpicum, Sébastien ULg et al

in Proceedings International Workshop on Environmental Hydraulics: Theoretical, Experimental and Computational Solutions (2009)

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See detailAlcohol consumption and the prevalence of metabolic syndrome : a meta-analysis of observational studies
Alkerwi, A; Boutsen, M; Vaillant, M et al

Poster (2009)

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See detailDynamically constrained ensemble perturbations. Application to tides on the West Florida Shelf
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Beckers, Jean-Marie ULg et al

Conference (2009)

A method is presented to create an ensemble of perturbations that satisfies linear dynamical constraints. A cost function is formulated defining the probability of each perturbation. It is shown that the ... [more ▼]

A method is presented to create an ensemble of perturbations that satisfies linear dynamical constraints. A cost function is formulated defining the probability of each perturbation. It is shown that the perturbations created with this approach take the land-sea mask into account in a similar way as variational analysis techniques. The impact of the land-sea mask is illustrated with an idealized configuration of a barrier island. Perturbations with a spatially variable correlation length can be also created by this approach. The method is applied to a realistic configuration of the West Florida Shelf to create perturbations of the M2 tidal parameters for elevation and depth-averaged currents. The perturbations are weakly constrained to satisfy the linear shallow-water equations. Despite that the constraint is derived from an idealized assumption, it is shown that this approach is applicable to a non-linear and baroclinic model. The amplitude of spurious transient motions created by constrained perturbations of initial and boundary conditions is significantly lower compared to perturbing the variables independently or to using only the momentum equation to compute the velocity perturbations from the elevation [less ▲]

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See detailEmbryo transfer as a tool for experimental reproduction of ovine herds.
Rizzo, H.; François, D.; Fassier, T. et al

in Ciência Animal Brasileira (2009), Suppl 1

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See detailLes droits de la personnalité des personnes mineures ou vulnérables
Fierens, Jacques ULg; Mathieu, Géraldine

in Renchon, jean-Louis (Ed.) Les droits de la personnalité. Actes du Xe colloque de l'Association "Famille & droit", Louvain-la-Neuve, 30 novembre 2007 (2009)

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See detailDynamic interaction between merchandizes and supporting structure in steel storage racking systems
Degée, Hervé ULg; Denoël, Vincent ULg

in Proceedings of the COMPDYN 2009 Conference (2009)

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See detailTerritory knowledge (B1pc) - Discussion report
Breuer, Christophe ULg

Conference (2009)

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See detailRythmes biologiques et comportement animal.
Poncin, Pascal ULg

Conference (2009)

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See detailImpact de l’action anthropique sur la diversité floristique et structurale de la forêt de Rumonge au Burundi.
Hakizimana, P; Lejoly, J; Habonimana, B et al

in Dahdouh-Guebas, F (Ed.) Proceedings of the Symposium on African Botany in Brussels (2009)

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See detailHydro-mechanical modeling of damage due to underground excavation in hardened clay
Levasseur, Séverine ULg; Collin, Frédéric ULg; Frieg, Bernd et al

in Pietruszczak, Stan; Pande, Gyan; Tamagnini, Claudio (Eds.) et al Computational Geomechanics (2009)

A zone with significant irreversible processes and significant changes in flow and transport properties is expected to be formed after underground excavations. The perturbation of the excavation could ... [more ▼]

A zone with significant irreversible processes and significant changes in flow and transport properties is expected to be formed after underground excavations. The perturbation of the excavation could lead to a significant increase of the permeability, related to diffuse and/or localized crack proliferation in the material. The main objective of the study is to model these processes at large scale in order to assess their impacts on the performance of radioactive waste geological repositories. This paper concerns more particularly the hydro-mechanical modeling of a long term dilatometer experiment performed in Mont Terri Rock Laboratory in Switzerland. The proposed model defines the permeability as a function of the aperture of the cracks that are generated during the excavation. With this model, the permeability tensor becomes anisotropic. These developments are validated with the results of the experiment. [less ▲]

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See detailPhysicochemical characterization of fat blends related to margarine formulation
Danthine, Sabine ULg; Fernando Munoz, J; Cavillot, V et al

Poster (2009)

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See detailGeneration of total angular momentum eigenstates in remote qubits
Maser, A.; Schilling, U.; Bastin, Thierry ULg et al

Conference (2009)

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See detailVariation in DNA methylation patterns of Phaseolus bean interspecific hybrids leads to abnormal embryo and plant development
Abid, Ghassen ULg; Muhovski, Yordan; Jacquemin, Jean-Marie et al

Poster (2009)

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See detailUsing 3D Contours and Their Relations for Cognitive Vision and Robotics
Başeski, Emre; Pugeault, Nicolas; Kalkan, Sinan et al

in 24th International Symposium on Computer and Information Sciences (2009)

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See detailA comparison between pulse contour analysis and Doppler echocardiographic measurements of cardiac output in awake horses
Guidi, E; Amory, Hélène ULg; Borde, Laura ULg et al

in In Proceedings of the 3rd Annual Congress of the European College of Equine Internal Medicine (ECEIM) (2009)

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See detailFORMULATION OF PEPTIDE-LOADED LIPOSOMES FOR INTRAVENOUS DELIVERY: OPTIMIZATION OF THE ENCAPSULATION EFFICIENCY
Ducat, Emilie ULg; Brion, Michael; Evrard, Brigitte ULg et al

Conference (2009)

Purpose: Print 3G is a peptidic antagonist of oncoprotein involved in breast cancer, containing 25 amino acids. The purpose of this work is to study the peptide encapsulation into PEGylated liposomes ... [more ▼]

Purpose: Print 3G is a peptidic antagonist of oncoprotein involved in breast cancer, containing 25 amino acids. The purpose of this work is to study the peptide encapsulation into PEGylated liposomes composed of SPC:CHOL:mPEG-2000-DSPE (47:47:6). Methods: Loaded unilamellar vesicles were prepared by hydration of lipid film method. Unfortunately, a loss of Print 3G was observed during the different steps of this manufacturing technique giving rise to encapsulation efficiencies (EE) close to 0 %. Thus, the freeze-thawing method was used to enhance the amount of Print 3G encapsulated into blank liposomes prepared using the above procedure. Because many factors may influence the peptide entrapment into the vesicles (number of freeze-thawing cycles (NC), lipid concentration (LC), peptide concentration (PC) and mixing time (MT)), a design of experiment (DOE) was performed (for the screening, a Plackett and Burman plan; for the optimization, a central composite design). EE were calculated in terms of quantity of peptide loaded in liposomes as a function of quantity operated (EEp) or quantity of lipids (EEl). Results: The EE obtained by the freeze-thawing method in standard conditions (Katanasaka, Ida et al., 2008; Maeda, Bharate et al., 2008), amounted to 26.20 ± 7.98 %, n=3 (EEp) and to 0.26 ± 0.074 % (EEl). Among the different considered parameters, the screening permitted to identify two factors having a positive and significant influence on the EE: NC and LC. Concerning the PC and MT, no influence was revealed. For the second part of the DOE, the positive factors were optimized and obtained results revealed a theoretical optimum at 64.75 ± 3.55 % when 11 freeze-thawing cycles were applied (NC) and for the following LC: 36.1 mM SPC, 36.1 mM CHOL and 4mM mPEG-2000-DSPE. The experimental results showed an encapsulation efficiency of 62.68 ± 2.93 %. Photon correlation spectroscopy and freeze-fracture electron microscopy were also realized to examine the liposome integrity, before and after the freeze-thawing cycles. Conclusion: Changing the manufacturing technique permitted a significant encapsulation of Print 3G into liposomes. The DOE led to a significant improvement of encapsulation efficiencies. References: (1) Katanasaka,Y., Ida,T., Asai,T., Maeda,N., Oku,N., 2008. Effective delivery of an angiogenesis inhibitor by neovessel-targeted liposomes. International Journal of Pharmaceutics, 360, 219-224. (2) Maeda,H., Bharate,G.Y., Daruwalla,J., 2008. Polymeric drugs for efficient tumor-targeted drug delivery based on EPR effect. Eur. J Pharm Biopharm. Acknowledgements: This work was supported by the Ministry of the Walloon Region. [less ▲]

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See detailCrystal chemistry of lithium in pegmatite phosphates: A SIMS investigation of natural and synthetic samples
Hatert, Frédéric ULg; Ottolini, Luisa; Keller, Paul et al

in Estudios Geologicos (2009), 19(2), 131-134

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See detailDesign of a Stable Lagrange Multiplier Space for Stiff Boundary Conditions
Béchet, Eric ULg; Moës, Nicolas; Wohlmuth, Barbara

in Zilian, A.; Fries, T. P. (Eds.) International Conference on Extended Finite Element Methods – Recent Developments and Applications XFEM 2009 (2009)

We introduce a new algorithm to define a stable Lagrange multiplier space to impose stiff interface conditions within the context of the eXtended Finite Element Method. In contrast to earlier approaches ... [more ▼]

We introduce a new algorithm to define a stable Lagrange multiplier space to impose stiff interface conditions within the context of the eXtended Finite Element Method. In contrast to earlier approaches, we do not work with an interior penalty formulation as, e.g., for Nitsche techniques, but impose the constraints weakly in terms of Lagrange multipliers. The new algorithm allows a local construction of the Lagrange multiplier space while improving the accuracy of the computed fields. The originality of this approach with regard to former approaches lies in the use of the trace of primary shape functions defined on the domain, and a simplified procedure to define the mesh on the interface. Moreover, the newly constructed Lagrange multiplier space satisfies, in contrast to the naive approach, a uniform inf-sup condition. [less ▲]

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See detailMinéralogie et pétrographie des phosphates de pegmatites brésiliennes, avec un intérêt particulier pour leurs relations avec les silicates
Baijot, Maxime ULg; Hatert, Frédéric ULg; Philippo, Simon

in Abstract book, 26ème Réunion annuelle des collaborateurs scientifiques du Musée d'histoire naturelle du Luxembourg (2009)

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See detailDetection of placental lactogens in Swamp buffalo by radioimmunoassay technique.
Hanh, N. V.; Huu, Q. X.; Uoc, N. T. et al

in Reproduction, Fertility and Development (2009), 21(1), 152-153

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See detailDe l’équité dans l’adaptation aux impacts du changement climatique
Gemenne, François ULg

in Cournil, Christel; Colard-Fabregoule, Catherine (Eds.) Changements climatiques et défis du droit (2009)

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See detailLes expositions d'art sonore: désarçonnantes?
Eloy, Céline ULg

Conference (2009)

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See detailSimulation de l’écoulement dans des filtres à charbons actifs par la méthodologie des réseaux de Boltzmann
Verdin, Emeline ULg; Beugre, Djomice Antoine ULg; Ania, Conchi et al

in SFGP (Ed.) Récents Progrès en Génie des Procédés - N°98 - A la croisée des sciences et des cultures pour relever les défis industriels du XXIème siècle - Actes du 12ème Congrès de la Société Française de Génie des Procédés, Marseille, France, 14-16 octobre 2009 (2009)

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See detailLa décentralisation et les possibilités de développement locales en RDC : l'intégration des économies locales en RDC par l'approche de filières certifiées "équitables" : l'exemple du CDI-Bwamanda
Duquesne, Brigitte ULg; Lebailly, Philippe ULg

in Conférence 25èmes Journées Scientifiques ATM 2009 "Attractivité, gouvernance et développement", 3, 4 et 5 juin 2009 : actes du colloque (2009)

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See detailLes clauses exonératoires ou limitatives de responsabilité insérées dans les conditions générales: leurre ou évidence?
Kohl, Benoît ULg; Grisard, Delphine ULg

in Les conditions générales - Questions particulières (2009)

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See detailGerminal centre innervation of bovine and human tonsils related to prion diseases.
Defaweux, Valérie ULg; Dorban, Gauthier; Antoine, Nadine ULg et al

in Brain, Behavior & Immunity (2009), 23(1), 10

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See detailQuelle politique fisale internationale pour la Belgique?
Bourgeois, Marc ULg

Conference (2009)

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See detailA Xylophone Bar Magnetometer for micro/pico satellites
Rochus, Véronique ULg; Lamy, Hervé; Niyonzima, Innocent et al

in Materials and Structures Symposium (C2.8): Specialised Technologies, including Nanotechnology (2009)

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See detailArchitectural ceramics dating applied to medieval building archaeology: the case of the church Notre-Dame-sous-Terre (Mont-Saint-Michel, France)
Blain, Sophie ULg; Guibert, Pierre; Bouvier, Armel et al

in Moreau, Jean-François; Auger, Réginald; Chabot, Jacques (Eds.) et al 36th International Symposium of Archeometry 2-6 May 2006, Québec City, Canada (2009)

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See detailLearning Visual Representations for Interactive Systems
Piater, Justus ULg; Jodogne, Sébastien ULg; Detry, Renaud ULg et al

in 14th International Symposium on Robotics Research (2009)

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See detailNormal MRI-anatomy of the foal foot from birth to seven months of age.
Van Thielen, B.; Busoni, Valeria ULg; Van den Broeck, R. et al

in AVEF Proceedings (2009)

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See detailEvaluation of elbow biomechanical models using data fusion: Application to elbow flexion
Leboucher, Julien; Schwartz, Cédric ULg; Brochard, Sylvain et al

in Gait & Posture (2009), 30(2009), 60-61

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See detailDevelopment of an RMS model based on colored object-oriented Petri nets with changeable structures
Zhang, Linda; Ittoo, Ashwin ULg

in IEEE Proceedings of the 16th International Conference on Industrial Engineering and Engineering Management (2009)

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See detailUsing Artificial Vision for the Microscopic Identification of Ores with Reflected Light: Preliminary Results.
Castroviejo, Ricardo; Brea, Carolina; Perez-Barnuevo, Laura et al

in Proceedings 10th Biennial SGA Meeting (2009)

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See detailPenser les pratiques après C.Brandi. Vers une praxéologie et axiologie des restaurations en art contemporain.
Verbeeck, Muriel ULg

in Art d’aujourd’hui, patrimoine de demain, Actes du colloque SFIIC-INP (2009)

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See detailMultiphysic topology optimization of electromechanical microdevices considering pull-in voltage using an electrostatic force filter
Lemaire, Etienne ULg; Duysinx, Pierre ULg; Rochus, Véronique ULg

in Proceeding of the 8th World Congress on Structural and Multidisciplinary Optimization (2009)

Electrostatic actuation is often used in microsystems as it is relatively easy to implement and provides a short response time. However, because of the non-linearity of electrostatic forces, these devices ... [more ▼]

Electrostatic actuation is often used in microsystems as it is relatively easy to implement and provides a short response time. However, because of the non-linearity of electrostatic forces, these devices may suffer from an unstable behavior called pull-in effect. Previous work of the authors intended to delay pull-in effect by maximizing pull-in voltage studying a simplified problem where the optimization domain was purely mechanical. The present paper generalizes the approach by considering a multiphysic optimization domain. However, the generalization of the optimization problem is not straightforward as local pull-in modes appear after a few optimization iterations. Therefore, the paper investigates several solutions to prevent the appearance of local pull-in modes. [less ▲]

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See detailRésolution du problème de contact mécanique frottant : méthode du lagrangien augmenté adapté
Bussetta, Philippe ULg; Marceau, Daniel; Ponthot, Jean-Philippe ULg

in Proceedings of “9ème Colloque National en Calcul des Structures (2009)

Cet article présente une nouvelle méthode de résolution du problème de contact mécanique frottant, celle du lagrangien augmenté adapté. Contrairement aux méthodes les plus utilisées (pénalisation et ... [more ▼]

Cet article présente une nouvelle méthode de résolution du problème de contact mécanique frottant, celle du lagrangien augmenté adapté. Contrairement aux méthodes les plus utilisées (pénalisation et lagrangien augmenté), l’utilisateur ne doit pas déterminer les valeurs des coefficients de pénalisation. Cette méthode est performante aussi bien avec des matériaux élastiques qu’élasto-plastiques. Le problème de Hertz est présenté. Cette méthode est au si utilisée dans le contexte multi-physique. [less ▲]

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See detailResemantisation in varieties of Dutch
De Vos, Lien ULg

Conference (2009)

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See detailFonctions attentionnelles et exécutives dans la dyspraxie développementale
Lejeune, Caroline ULg; Catale, Corinne ULg; Meulemans, Thierry ULg

Conference (2009)

La dyspraxie développementale se manifeste principalement par des difficultés motrices qui interfèrent avec différentes situations de la vie quotidienne (écriture, dessin, habillage, …). Ces troubles du ... [more ▼]

La dyspraxie développementale se manifeste principalement par des difficultés motrices qui interfèrent avec différentes situations de la vie quotidienne (écriture, dessin, habillage, …). Ces troubles du geste, qui touchent environ 6 % des enfants de 5 à 11 ans, entraînent de lourdes conséquences sur les plans familial, scolaire et social. Plusieurs études ont montré qu’un déficit des capacités d’inhibition, de planification et de mémoire de travail était fréquemment observé chez les enfants souffrant de dyspraxie. Toutefois, en raison des nombreux problèmes méthodologiques rencontrés dans ces recherches (et plus particulièrement liés à l’absence de contrôle de la présence ou non du trouble de l’attention avec/sans hyperactivité – TDA/H - chez la population d’enfants dyspraxiques), les relations entre les troubles attentionnels et les troubles moteurs restent encore à l’heure actuelle mal comprises. L’objectif de cette étude vise à dégager, au travers d’une évaluation du fonctionnement attentionnel et exécutif, le profil neuropsychologique d’enfants diagnostiqués dyspraxiques, et ce en contrôlant la présence d’un TDA/H. Nous avons administré à 23 enfants dyspraxiques âgés de 6 à 12 ans et 23 enfants de contrôle (appariés sur base de l’âge, du sexe et du niveau d’études des parents) des tâches attentionnelles (alerte, attention sélective et divisée) de la batterie TEA et des épreuves exécutives (inhibition [Stroop et Go/No Go], flexibilité cognitive [TEA], mémoire de travail [BTT et mise à jour de TEA] et planification [Tour de Londres]). Les analyses de comparaison de moyennes indiquent que les enfants dyspraxiques présentent des performances inférieures à celles des enfants de contrôle pour l’essentiel des tests neuropsychologiques administrés. Toutefois, deux tiers des enfants dyspraxiques de notre échantillon présentent un trouble de l’attention (critères du DSM-IV). L’analyse des résultats au sein du groupe « dyspraxique sans TDA », permet de montrer que les difficultés de planification, d’attention sélective visuelle, d’inhibition motrice, de mémoire à court terme (BTT et mise à jour) sont spécifiques à la dyspraxie et donc indépendant de la présence d’un trouble de l’attention. En conclusion, cette étude préliminaire montre qu’une grande proportion d’enfants qui présentent une dyspraxie souffre également d’un trouble de l’attention. L’analyse du profil des enfants dyspraxiques montre des difficultés qui touchent l’ensemble des fonctions attentionnelles et exécutives. Toutefois, les difficultés d’analyse visuelle, de planification et de mémoire de travail semblent, quant à elles, spécifiques à la dyspraxie développementale. Des études futures réalisées sur un plus grand nombre de participants permettraient de confirmer cette hypothèse. [less ▲]

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See detailEvaluation of the effect of load eccentricity on pull-off strength
Moczulski, Grzegorj; Garbacz, Andrzej; Courard, Luc ULg

in Alexander, M. G.; Beushausen, H.-D.; Dehn, F. (Eds.) et al Concrete Repair, Rehabilitation and Retrofitting II (2009)

The efficiency of the composite repair system is usually evaluated through semi-destructive test: pull-off test. But some difficulties can also be induced by the eccentricity of the load application, due ... [more ▼]

The efficiency of the composite repair system is usually evaluated through semi-destructive test: pull-off test. But some difficulties can also be induced by the eccentricity of the load application, due to incorrect placement of the test device. The paper presents the results of a research project and the impact of incorrect design on tensile strength values. According to results of laboratory experiments and modelling, it can be observed that, if there is an influence of 2o and 4o angle of inclination on pull-off bond strength, it is however not statistically significant: the decrease of pull-off strength is usually no larger than 8% for 2o [less ▲]

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See detailMCF-7/BOS cells membrane proteome: comparison of two isolation methods using mass spectrometry
Bertrand, Virginie ULg; Massart, Anne-Cécile ULg; De Pauw-Gillet, Marie-Claire ULg et al

Poster (2009)

Membrane proteins play an important role in biological processes but their isolation and quantification using classical techniques is often limited due to their poor solubility and relatively low ... [more ▼]

Membrane proteins play an important role in biological processes but their isolation and quantification using classical techniques is often limited due to their poor solubility and relatively low abundance. These membrane markers have to be accessible to antibodies and should be potential therapeutic targets. The tests were conducted on MCF-7 / BOS cell line, immortal and easier to cultivate. The goal of this work is to obtain a pure membrane fraction to facilitate the analysis of the sample. To isolate transmembrane proteins, we compared two methods. The first one used different extraction cycles characterized by different buffers to isolate membrane proteins. The second method labelled accessible extracellular domains at the surface of MCF-7 cells with biotin prior to differential centrifugation. [less ▲]

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See detailUn autre usage du sacré. Quelques réflexions sur le concept de profanation et son rapport au théâtre de Valère Novarina
Dubouclez, Olivier ULg

in Sepsi, Enikö (Ed.) Le théâtre et le sacré. Autour de l’œuvre de Valère Novarina (2009)

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See detailThe Surface Ocean CO2 Atlas (SOCAT) - Coastal Regional group
Borges, Alberto ULg; Chen, A. T. C.; The SOCAT Regional group

Poster (2009)

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See detailOn modal interactions in strongly nonlinear systems
Peeters, Maxime ULg; Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg

in Euromech 503, Nonlinear Normal Modes, Dimension Reduction and Localization in Vibrating Systems, Frascati, 2009 (2009)

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See detaile-Demos, We'll Show You What We've Got !"
Lecomte, Béatrice ULg

Conference (2009)

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See detailMarket area of intermodal rail-road container terminals embedded in a hub-and-spoke network
Limbourg, Sabine ULg

Conference (2009)

This paper presents a methodology able to compare road and rail-road intermodal market areas that takes the network structures, the operation costs and the location of the rail-road terminals into account ... [more ▼]

This paper presents a methodology able to compare road and rail-road intermodal market areas that takes the network structures, the operation costs and the location of the rail-road terminals into account.Aparticular way to model rail-road transport on hub-and-spoke networks is outlined and illustrated on the trans-European networks. The market area of an optimal eight hubs network configuration is presented both for the p-hub median and the p-hub centre problem. This is followed by a discussion about the evolution of the market area according to the number and locations of the implemented hubs. [less ▲]

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See detailComa, consciousness and the brain
Noirhomme, Quentin ULg

Conference (2009)

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See detailReal-time spatial analysis of root water uptake in rhizotrons
Lobet, Guillaume ULg; Javaux, M.; Pages, L. et al

Poster (2009)

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See detailStudy of the formability of steels
Ben Bettaieb, Mohamed ULg; Lemoine, X.; Duchene, Laurent ULg et al

in Proceedings of the International ESAFORM Conference 2009 (2009)

In the present contribution, a new advanced Gurson model [1] is developed. This new model is an extension of the initial one, to the plastic anisotropy and the mixed (isotropic+ kinematic) hardening of ... [more ▼]

In the present contribution, a new advanced Gurson model [1] is developed. This new model is an extension of the initial one, to the plastic anisotropy and the mixed (isotropic+ kinematic) hardening of the fully dense matrix. The nucleation and the growth phases are considered by integrating the empirical laws developed by Bouaziz et al. [2] in this new model. These laws, identified on the basis of X-ray microtomography results, display the triaxiality effect on the nucleation and the growth of cavities. This advanced Gurson model is implemented into a finite element code by using an implicit-explicit integration scheme. FE simulations study the behavior of a sample submitted to tensile test and assess the influence of nucleation and growth laws on the formability of this sample. [less ▲]

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See detailInhibition of the Jagged-1/Notch pathway increases the hematopoiesis-supportive activity of mesenchymal stem cells
Briquet, Alexandra ULg; Dolhet, Marie; Beguin, Yves ULg et al

in Experimental Hematology (2009), 37(9), 77

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See detailYlang-ylang (Cananga odorata (Lam.) Hook. & Thoms. var. genuina) essential oils from Comoros Islands: characterization and variability
Benini, Céline ULg; Wathelet, Jean-Paul ULg; du Jardin, Patrick ULg et al

Poster (2009)

The Union of the Comoros is the world’s biggest producer of ylang-ylang essential oils. Comorian ylang-ylang also provides the most valuable essential oil that can be found on international market. This ... [more ▼]

The Union of the Comoros is the world’s biggest producer of ylang-ylang essential oils. Comorian ylang-ylang also provides the most valuable essential oil that can be found on international market. This product represents a high percentage of Comoros’ annual currency. Ylang-ylang essential oil is obtained by fractionned hydrodistillation or steam distillation of Cananga odorata fresh flowers. This oil is commercialized in five different quality grades (extra S; extra; I; II; III) which possess their own physicochemical properties. [less ▲]

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See detailMonitoring certain endocrine parameters for predicting stillbirth in dairy cows
Szenci, Otto; Bajcsy, A Cs; Brydl, E. et al

in Proceedings: XVII International congress of mediterranean federation of health and production of ruminants (2009)

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See detailGenetic structure of Barn swallow (Hirundo rustica).
Dardenne, Sophie ULg; Stevens, Virginie ULg; Hollander, F. et al

Poster (2009)

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See detailThe histone variant macroH2A is an epigenetic regulator of key developmental genes
Creppe, Catherine ULg; Soler, Marta; Di Croce, Luciano et al

Poster (2009)

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See detailInfluences de l'environnement sur la fonction endocrinienne
Charlier, Corinne ULg

Conference (2009)

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See detailPopulations vulnérables en temps de conflit armé
Pierre, Alexia ULg

in Guedah, Mohamed (Ed.) Délinquance et changements sociaux – dialogue nord/sud (2009)

De nombreux textes conventionnels et internationaux prévoient des dispositions de protection des populations non combattantes en temps de conflit armé. Parmi ces populations civiles, certains groupes sont ... [more ▼]

De nombreux textes conventionnels et internationaux prévoient des dispositions de protection des populations non combattantes en temps de conflit armé. Parmi ces populations civiles, certains groupes sont considérés comme plus vulnérables, dont les femmes et les enfants, pour lesquels des protections spéciales sont prévues. Malgré ces dispositions particulières, ces populations continuent de subir des exactions en temps de guerre, par exemple le viol systématique et massif, ou l'utilisation d'enfants dans les combats. [less ▲]

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See detailAdjoint Equations and Error Measure in Radiative Heat Transfer with Diffuse Reflection
Vueghs, Pierre ULg; Rochus, Pierre ULg

in Proceedings of the ASME 2009 Heat Transfer Summer Conference HT2009 (2009)

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See detailQuantum Entanglement Antibunching and Saturation of Atoms in Dipole Blockade
Gillet, Jérémie ULg; Agarwal, G. S.; Bastin, Thierry ULg

Conference (2009)

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See detailGrain boundary effects in bulk colossal magneto resistive (CMR) manganites and manganite/insulator composites: electrical and magnetic properties
Vanderbemden, Philippe ULg; Vertruyen, Bénédicte ULg; Ausloos, Marcel ULg et al

in Journal of Optoelectronics and Advanced Materials [= JOAM] (2009), 11(9), 1115-1121

In the first part of this paper, we discuss the effects of grain boundaries on the properties of bulk colossal magnetoresistive (CMR) manganites We compare the electrical resistivity and AC magnetic ... [more ▼]

In the first part of this paper, we discuss the effects of grain boundaries on the properties of bulk colossal magnetoresistive (CMR) manganites We compare the electrical resistivity and AC magnetic susceptibility of perovskite La-Ca-Mn-O samples with the same nominal stoichiometry but differing in their microstructure (i) a single grain sample, (ii) a sample containing two grains and (iii) a polycrystalline sample Emphasis is placed on information that can be deduced from the measurements in each case In the second part of the paper, we report the data measured on composite samples containing a CMR phase (La-Ca-Mn-O) and an insulating phase (Mn3O4) The results are discussed in the framework of percolation theory We show how the grain boundaries affect the electrical properties of these materials, and we highlight the crucial role of geometric (demagnetization) effects on the resistance vs magnetic field measurements [less ▲]

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See detailRegistrum omnium librorum medicinalium... La bibliothèque de Nicolas Valckenisse († ca 1480), docteur en médecine de Louvain
Adam, Renaud ULg; Van Hoorebeeck, Céline

in Vons, Jacqueline (Ed.) Pratique et pensée médicales à la Renaissance. Actes du 51e Colloque international d’études humanistes (Tours, 2-6 juillet 2007) (2009)

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See detailFootball, nationalisme et gouvernance
Tuñón, Jorge; Brey, Elisa ULg

Conference (2009)

Detailed reference viewed: 29 (2 ULg)