References of "Scientific congresses and symposiums"
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See detailA conceptual tool for successful participation
Cornélis, Bernard; Brunet, Sébastien ULg; Delvenne, Pierre ULg et al

Poster (2007, June 19)

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See detailUne rétrospective du Fonds des Communes : objectifs et indicateurs
Husson, Jean-François ULg

Conference (2007, June 19)

Cette présentation dresse l'historique du Fonds des communes en Wallonie et discute des objectifs énoncés du politique au regard des mécanismes et formules de répartition.

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See detailHemocompatibility study of new functionalized polycations tailored to modify the surface properties of red blood cells
Grandfils, Christian ULg; Riquelme, B; Foresto, P et al

Conference (2007, June 19)

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See detailEffet de l’expression hétérologue d’une oxydase alternative sur le protéome mitochondrial et cellulaire de Saccharomyces cerevisiae
Mathy, Grégory ULg

Conference (2007, June 15)

L’oxydase alternative (AOX) est une ubiquinol-oxygène oxido-réductase qui au niveau mitochondrial, catalyse l’oxydation de l’ubiquinol en transférant directement ses électrons à l’oxygène. De part son ... [more ▼]

L’oxydase alternative (AOX) est une ubiquinol-oxygène oxido-réductase qui au niveau mitochondrial, catalyse l’oxydation de l’ubiquinol en transférant directement ses électrons à l’oxygène. De part son activité catalytique, cette protéine entre en compétition avec le complexe III et est donc un système dissipateur d’énergie puisque les électrons transférés par AOX à l’oxygène ne contribueront pas à l’établissement du gradient électrochimique de protons par la voie des cytochromes. Dans cette étude, nous avons voulu déterminer l’impact de l’expression hétérologue d’AOX chez un organisme qui en est naturellement dépourvu : Saccharomyces cerevisiae. L’expression d’AOX chez S. cerevisiae est fonctionnelle et conduit à une augmentation du temps de génération de 30% par rapport à la souche contrôle. De manière à identifier les voies métaboliques affectées par l’expression d’AOX chez la levure, nous avons réalisés une étude protéomique sur le protéome mitochondrial et cellulaire par l’approche SILAC. Le SILAC (stable isotopic labelling by amino-acid in cell culture) est une technique de protéomique comparative qui permet de calculer directement les changements de niveau d’expression des protéines par spectrométrie de masse, contrairement aux gels 2D, ou les changements sont estimés par densitométrie. Cette technique se base sur l’incorporation d’un acide aminé « lourd » ou « léger » lors de la traduction des protéines lors des cultures cellulaire. L’incorporation de ces acides aminé va induire en spectrométrie de masse, un décalage de masse entre deux peptides de même séquence et rendre possible directement la comparaison des niveau d’expression a calculant le rapport d’intensité des deux pics. En comparant le protéomes mitochondrial, nous avons remarqué une augmentation générale du niveau d’expression de tous les enzymes du cycle de Krebs. Cette augmentation est accompagnée par une augmentation du niveau d’expression des NADH déshydrogénases interne et une diminution de la NADH déshydrogénase externe suggérant une augmentation de l’entrée des électrons dans la chaîne respiratoire via la production d’équivalents réducteurs par le cycle de Krebs plutôt que par les équivalent réducteurs issus du cytoplasme. En comparant les protéomes cellulaires, nous avons observés une diminution globale de toutes les protéines mitochondriales suggérant une diminution de la masse mitochondriales par cellules. Cette diminution est accompagnée par une augmentation générale de la glycolyse d’un facteur 2,5. [less ▲]

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See detailTHIXOFORMAGE DES METAUX: Mise en forme rapide de pièces fonctionelles “near-net-shape” à design complexe dignes du forgeage!
Rassili, Ahmed ULg; Vaneetveld, Grégory ULg; Pierret, Jean-Christophe ULg et al

Poster (2007, June 14)

Présentation du laboratoire de thixofomage de métaux.

Detailed reference viewed: 88 (3 ULg)
See detailCarbon dioxide fluxes in Lake Kivu
Borges, Alberto ULg; Delille, Bruno ULg; Descy, Jean-Pierre et al

Conference (2007, June 12)

Detailed reference viewed: 5 (2 ULg)
See detailStructure and production of mesozooplankton in Lake Kivu (East Africa)
Isumbisho, Pascal; Sarmento, Hugo; Darchambeau, François ULg et al

Conference (2007, June 12)

See detailPlanktonic Archaea in Lake Kivu
Llirós, Marc; Darchambeau, François ULg; Plasencia, Anna et al

Conference (2007, June 12)

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See detailTypologie physique des drogues de synthèse
Rubini, Aurore; Brostaux, Yves ULg

Conference (2007, June 11)

Detailed reference viewed: 65 (2 ULg)
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See detailLa défaillance des PME : processus et (auto)diagnostic
Crutzen, Nathalie ULg; Van Caillie, Didier ULg

Conference (2007, June 11)

This presentation provides both a large overview of the different processes leading to business failure in SMEs and a proposal of a structured tool organized as a self-diagnosis mechanism to prevent ... [more ▼]

This presentation provides both a large overview of the different processes leading to business failure in SMEs and a proposal of a structured tool organized as a self-diagnosis mechanism to prevent bankruptcy in a particular SME. [less ▲]

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See detailStructural Fire Safety Assessment through numerical modelling
Franssen, Jean-Marc ULg

Conference (2007, June 11)

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See detailDevelopment of a new integrated biosensor system for an accurate diagnosis of prostate cancer using optoacoustic detection
Fleron, Maximilien ULg; Schol, Daureen ULg; Greisch, Jean-François et al

Poster (2007, June 09)

The prostate cancer is the most common male-specific cancer observed in the European Union and is the second leading cause of cancer death in men in our industrialized countries. The choice of treatment ... [more ▼]

The prostate cancer is the most common male-specific cancer observed in the European Union and is the second leading cause of cancer death in men in our industrialized countries. The choice of treatment and its efficiency is largely dependent on the stage and on the degree of advancement of the cancer when it is diagnosed. Screening procedures like digital rectal examination (DRE) and free prostate specific antigen (PSA) level testing are well established but lack accuracy, yielding only 80% of prostate cancers diagnosed in an early stage. By providing a more accurate and precise tool for diagnosing prostate cancer in its early stages, the percentage of curable cancer patients would increase radically. Current imaging techniques have limited value, thus a major challenge in current prostate cancer oncology is to develop more accurate imaging assessments. An efficient imaging technique which significantly improves the sensitivity and specificity of diagnosing, staging and predicting the behaviour of prostate cancer would be extremely valuable. The ADONIS Project intends to prove the concept of using optoacoustic imaging in combination with biologically functionalized nanoparticles as an integrated biosensor based system for the production of specific and sensitive data for accurate diagnosis of prostate cancer. The achievement of this objective requires excellent know-how on a variety of scientific and technologic fields, brought by the partners of ADONIS, coming from five European countries, such as laser and ultrasound technologies and image reconstruction techniques, the bio-functionalization of nanoparticles, the system integration and, finally, experiments and competent evaluation of the results for their application potential. The development of the biosensor is firstly performed to target the Prostate Specific Membrane Antigen (PSMA), a transmembrane protein considered as a suitable biomarker for prostate cancer and which is under intense investigation for use as an imaging and therapeutic target. To allow the detection optimization of the biosensor, a 3D cellular culture technique (Rotating Cell Culture System) is developed with LNCaP cells (a human prostate carcinoma cell line reported to express PSMA) to be closest to the in vivo aspect for which a three-dimensional aspect of tumor for the biosensor detection is needed. Detection and localisation of PSMA on LNCaP cell surface was performed by immunostainning on monolayer culture and on spheroid slices. Then, by backscattered electron (BSE) microscopy analysis, detection of nanoparticles on cells surface shows the successful binding of the biosensor to the cells expressing PSMA. In prospect, the detection of the biosensor will be tested on large spheroids and finally tested on in vivo model. [less ▲]

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Peer Reviewed
See detailMetafiction in Frame's Literature for Children
Delrez, Marc ULg

Conference (2007, June 08)

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See detailUtilisation des techniques de traçage en hydrogéologie. Investigation et quantification des interactions rivière-nappe par traçage, monitoring des niveaux d'eau et modélisation
Brouyère, Serge ULg; Batlle-Aguilar, Jordi

Conference (2007, June 08)

Ce séminaire visait à présenter à des étudiants de l'EIER les grands principes des techniques de traçage en hydrogéologie, accompagné d'une illustration avec des résultats d'investigations menées sur un ... [more ▼]

Ce séminaire visait à présenter à des étudiants de l'EIER les grands principes des techniques de traçage en hydrogéologie, accompagné d'une illustration avec des résultats d'investigations menées sur un site contaminé. [less ▲]

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See detailFermentation contrôlée des olives vertes de table.
Lamzira, Z.; Ghabour, N.; Thonart, Philippe ULg et al

Poster (2007, June 07)

Detailed reference viewed: 32 (1 ULg)
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See detailTop-Down Proteomics using Matrix-Enhanced ISD
Demeure, Kevin ULg; Quinton, Loïc ULg; Gabelica, Valérie ULg et al

Conference (2007, June 05)

Detailed reference viewed: 10 (1 ULg)
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See detailLa maladie d'Hirayama
TOMASELLA, Marco ULg

Conference (2007, June 05)

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See detailSTUDY OF THE POSSIBILITY TO PRODUCE CELLULOSE MICROFIBRILS BY APPLYING SHEARING TREATMENTS TO CELLULOSE FIBERS
Jacquet, Nicolas ULg; Paquot, Michel ULg

Poster (2007, June 04)

Cellulose is a linear biopolymer composed of glucose residues linked by β 1-4 glucosidics bonds. These characteristics enable cellulose molecules to adopt an extended rod-like configuration. In the ... [more ▼]

Cellulose is a linear biopolymer composed of glucose residues linked by β 1-4 glucosidics bonds. These characteristics enable cellulose molecules to adopt an extended rod-like configuration. In the microfibrils, the multiple hydroxyl groups on the glucose residues hydrogen bond with each other, holding the chains firmly together and contributing to their high tensile strength. This study has shown the possibility to produce cellulose microfibrils by applying shearing treatment. Homogenisation and microfluidisation treatments permit to obtain microfibrils with 5 to 20 μm length and a 20 to 50 nm diameter. This study also shows that a tridimensional network, typical of a gel, appears in the treated samples [less ▲]

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Peer Reviewed
See detailJanet Frame's Self-Writing
Delrez, Marc ULg

Conference (2007, June 02)

Detailed reference viewed: 5 (1 ULg)
See detailNation und Publikum in der spanischen Literatur des 19. Jahrhunderts
Ceballos Viro, Alvaro ULg

Conference (2007, June 02)

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See detailThe Faint Hot Component of Debris Disks Revealed by Infrared Interferometry
di Folco, E.; Absil, Olivier ULg; Augereau, J.-C. et al

Conference (2007, June 01)

Very few main-sequence stars exhibit warm dust in their 5-10AU close environment, where terrestrial planets are expected to have formed. Near-infrared interferometry is a powerful means, combining high ... [more ▼]

Very few main-sequence stars exhibit warm dust in their 5-10AU close environment, where terrestrial planets are expected to have formed. Near-infrared interferometry is a powerful means, combining high dynamic range and high spatial resolution, to directly detect faint emission from hot grains in exozodiacal clouds. We will review the results of our search for 2 micron excesses around Vega-like stars, including the nearby Sun-like stars Tau Ceti and Epsilon Eridani, with the FLUOR interferometric instrument and the CHARA Array of telescopes. Our recent detections, combined with Spitzer observations around 10 micron, put strong constrains on the properties and distribution of hot grains in these inner planetary systems. We will present the conclusions of our preliminary modeling for the detected hot grains as well as their implication for the selection of targets for future planet finding missions like DARWIN or TPF. [less ▲]

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See detailExploration of the neuronal substrates of Directed Forgetting with fMRI
Feyers, Dorothée ULg; Hogge, Michaël; Salmon, Eric ULg et al

Conference (2007, June 01)

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See detailHydraulic modelling along river Ourthe considering impacts of climate change
Dewals, Benjamin ULg

Conference (2007, June 01)

Detailed reference viewed: 4 (1 ULg)
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See detailThe function of the transcription factor Egr1 in zebrafish cartilage development
Dalcq, Julia ULg; Pasque, Vincent; Ramos, Sonia Davila et al

in Developmental Biology (2007, June 01), 306(1), 439-440

Detailed reference viewed: 57 (12 ULg)
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See detailHydraulic modelling along river Ourthe
Dewals, Benjamin ULg; Detrembleur, Sylvain ULg; Archambeau, Pierre ULg et al

Conference (2007, June 01)

Detailed reference viewed: 12 (3 ULg)
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See detailSox4b is required for pituitary expression of gata2 and specification of thyrotrope cells in zebrafish
Muller, Marc ULg; Mavropoulos, A.; Nica, G. et al

in Developmental Biology (2007, June 01), 306(1), 438-439

Detailed reference viewed: 118 (4 ULg)
See detailProspects for Nulling Interferometry from Antarctica
Coudé Du Foresto, V.; Absil, Olivier ULg; Barillot, M. et al

Poster (2007, June 01)

The high Antarctic plateau is a very unique environment whose main characteristics make it a premier site for high angular resolution, high dynamic range observations at infrared wavelengths. This is due ... [more ▼]

The high Antarctic plateau is a very unique environment whose main characteristics make it a premier site for high angular resolution, high dynamic range observations at infrared wavelengths. This is due to a combination of cold temperatures (low emissivity), dry air (infrared transparency), and a night time atmospheric turbulence which is concentrated in the first ~30m near the ground (which results in a large isoplanatic angle). Above that turbulent layer (a location that can be reached either by support structures or tethered balloons), the free air seeing is both exceptionally benign and slow. There, simulations show that a small dedicated interferometer (two 1m-class telescopes) equipped with a nuller instrument performs better than the same instrument behind 8m-class telescopes on a temperate site. It can characterize the distribution of dust emission around nearby main sequence stars, a necessary precursor science for Darwin and TPF-I. The nature of the site, intermediate between ground and space both in potential and technical challenge, adds particular relevance to the demonstration of nulling for a space mission. [less ▲]

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See detailAnalysis of hydraulic hybrid vehciles and economical comparison with hybrid electric vehicles
Louvigny, Yannick ULg; Nzisabira, Jonathan; Duysinx, Pierre ULg

Conference (2007, June 01)

Hybrid Hydraulic Vehicle (HHV) technology is an alternative to HEV. This technology deserves new attention because of recent development in reversible hydraulic motor pumps with high efficiency. The HHV ... [more ▼]

Hybrid Hydraulic Vehicle (HHV) technology is an alternative to HEV. This technology deserves new attention because of recent development in reversible hydraulic motor pumps with high efficiency. The HHV technology is based on parallel architecture of motor assist systems. A first preliminary study investigated the fuel consumption of a passenger car, a SUV and an urban bus. It clearly demonstrated that the fuel efficiency benefits are the better for heavy vehicles with frequent stops and starts. The second part of the work then compared both HEV and HHV buses. The fuel consumption is simulated using ADVISOR on the basis of 3 SORT driving cycles. The results showed that the HHV are penalized by his weight but they can be economically interesting because of the lower cost and longer life time of the hydraulic system. [less ▲]

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See detailEffect of 2D and 3D vision on the learning of fine motor skills according to the instrumental dimension: The case of minimal invasive surgery
Blavier, Adelaïde ULg; Nyssen, Anne-Sophie ULg

Conference (2007, June 01)

New technology in surgery is more and more present and allows to study cognitive processes in complex and natural environment. Comparing to classical minimal access surgery, a new robotic system allows to ... [more ▼]

New technology in surgery is more and more present and allows to study cognitive processes in complex and natural environment. Comparing to classical minimal access surgery, a new robotic system allows to recover a 3D view and all degrees of freedom for instruments movement. The purpose of this study was to evaluate the perceptual (2D vs 3D view) and instrumental (classical versus robotic) impacts of this new robotic system on learning curves. 40 medical students without any surgical experience were randomized into 4 groups (classical laparoscopy with 3D-direct view or with 2D-indirect view, robotic system in 3D or in 2D) and repeated a surgical task 6 times. After these 6 repetitions, they performed 2 trials with the same technique but in the other viewing condition (perceptive switch). Finally, subjects performed last three trials with the technique they never used (technical switch). We measured the speed, the accuracy and their subjective impressions about their performance (satisfaction, self-confidence and difficulty). Our results showed better performance and improvement in 3D view than in 2D view, whatever the instrumental aspect. Participants reported less mastery, familiarity, self-confidence and more difficulty in classical laparoscopy with 2D view than in the other conditions. In conclusion, robotic surgery improves surgical performance and learning, particularly by 3D view advantage. However, the bad performances after the perceptive and technical switches emphasize the need to adapt and pursue training also with traditional technology in order to prevent risks when a robotic procedure has to be converted in a classical laparoscopic procedure. [less ▲]

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See detailGefitinib monotherapy in advanced non-small cell lung cancer (NSCLC): Experience from a large, Western community implementation study
van Puijenbroek, R.; Bosquee, Léon ULg; Meert, A. P. et al

in European Respiratory Journal (2007, June), 29(1), 128-133

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See detailBenefit of NIRS for products under protected geographical indication label : the example of the Belgian Ardenne ham.
Sindic, Marianne ULg; Collard, Caroline; Sinnaeve, Georges et al

in Abstracts of the 13th International conference on near infrared spectroscopy (2007, June)

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See detailImproved blood pressure control but similar efficacy with lumiracoxib 100 mg OD compared to ibuprofen 600 mg TID in hypertensive patients with osteoarthritis: randomised controlled trial
MacDonald, T.; Littlejohn, T.; Richard, D. et al

in Annals of the Rheumatic Diseases (2007, June), 66(Suppl.II), 502

Detailed reference viewed: 18 (4 ULg)
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See detailRemoval processes and their distribution inside a subsurface horizontal flow constructed wetland.
Fonder, N.; Xanthoulis, Dimitri ULg

in Proceedings of the International Conference on Multiple Roles of Wetlands, multi-functions of wetland systems (2007, June)

Detailed reference viewed: 32 (3 ULg)
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See detailInfrared Electronic speckle pattern interferometry at 10 µm
Vandenrijt, Jean-François ULg; Georges, Marc ULg

in Osten, W.; Gorecki, C.; Novak, E. (Eds.) Optical Measurement Systems for Industrial Inspection V (2007, June)

Demonstration of electronic speckle pattern interferometry of opaque scattering objects at 10 µm wavelength using a commercial thermal-camera is presented for the first time to our knowledge. The idea of ... [more ▼]

Demonstration of electronic speckle pattern interferometry of opaque scattering objects at 10 µm wavelength using a commercial thermal-camera is presented for the first time to our knowledge. The idea of using a wavelength longer than the usual visible ones is to render such holographic displacement measurement techniques less sensitive to external perturbations. We have observed the rotation of a metallic plate and applied the phase-shifting technique for quantitative measurements [less ▲]

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See detailOral contraception and lipid peroxidation
De Groote, D.; Pincemail, Joël ULg; Defraigne, Jean-Olivier ULg et al

in Clinical Chemistry (2007, June), 53(6, Suppl. S), 30-30

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See detailAn Iterative Finite Element Perturbation Method for Computing Electrostatic Field Distortions
Boutaayamou, Mohamed ULg; V Sabariego, Ruth ULg; Dular, Patrick ULg

in Proceedings of 16th Conference on the Computation of Electromagnetic Fields (COMPUMAG2007) (2007, June)

A finite element (FE) perturbation method for computing electrostatic field distortions due to moving conductors is presented. First, an unperturbed problem (in the absence of conductors) is solved with ... [more ▼]

A finite element (FE) perturbation method for computing electrostatic field distortions due to moving conductors is presented. First, an unperturbed problem (in the absence of conductors) is solved with the conventional FE method in the complete domain. Then, a perturbed problem is computed in a reduced region using the solution of the unperturbed problem as a source field. When the source is close to the perturbing regions, an iterative computation may be required. The developed procedure allows for solving sub-problems in reduced domains with independent problem-adapted meshes. [less ▲]

Detailed reference viewed: 24 (14 ULg)
See detailThe Epidemiology of pituitary tumors : Results of an international collaborative study
Daly, Adrian ULg; Cogne, M.; Jaffrain-Réa, M. L. et al

in The Endocrine Society's - 89 Annual Meeting : Toronto, Canada, 2-5 june 2007 (2007, June)

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See detailForm@HETICE : une étude de cas vue sous l'angle de la théorie des communautés de pratique
Milstein, A.; Denis, Brigitte ULg

in Actes du Colloque EIAH 2007 : International Workshop "Learning and working in CoPs : theoretical and technological issue" (2007, June)

La notion de communauté de pratique peut jouer un rôle important dans une nouvelle réflexion sur l’apprentissage. De nombreuses théories sur le sujet se multiplient dans la littérature. Néanmoins, comme ... [more ▼]

La notion de communauté de pratique peut jouer un rôle important dans une nouvelle réflexion sur l’apprentissage. De nombreuses théories sur le sujet se multiplient dans la littérature. Néanmoins, comme le soulignent Dameron et Josserand (2005), il manque une analyse processuelle du développement des communautés de pratique. Il existe un décalage réel entre la richesse conceptuelle des travaux sur cette forme d’organisation et le peu d’études en profondeur sur la dynamique de ce type de groupes, les « phases » de leur développement ainsi que sur l’impact effectif du partage des pratiques. Un certain nombre d’enquêtes (Dameron & Josserand, 2005 ; Cappe, 2005 ; Laferrière, 2005) ont déjà été réalisées. Notre travail entre dans cette démarche de validation du concept de communauté de pratique. Nous présentons ici une étude de cas : le projet Form@HETICE. Cet article décrit notre travail d’observation de la situation actuelle et d’identification de l’existence ou non de communautés de pratique au sein de ce projet. [less ▲]

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See detailInequalities from two rows of the simplex tableau
Andersen, Kent; Louveaux, Quentin ULg; Weismantel, Robert et al

in Fischetti, Matteo; David P., Williamson (Eds.) Integer Programming and Combinatorial Optimization, 12th International IPCO Conference, Ithaca, NY, USA, June 25-27, 2007, Proceedings. (2007, June)

In this paper we explore the geometry of the integer points in a cone rooted at a rational point. This basic geometric object allows us to establish some links between lattice point free bodies and the ... [more ▼]

In this paper we explore the geometry of the integer points in a cone rooted at a rational point. This basic geometric object allows us to establish some links between lattice point free bodies and the derivation of inequalities for mixed integer linear programs by considering two rows of a simplex tableau simultaneously. [less ▲]

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See detailDetection of Vibrio cholerae, V. parahaemolyticus and V. vulnificus in seafood using real time PCR.
Lemaire, Cédric; Darcy; China, Bernard et al

Poster (2007, June)

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See detailEntanglement of localized states
Martin, John ULg; Giraud, Olivier; Georgeot, Bertrand

Conference (2007, June)

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See detailA solid-state phase conjugate mirror for space Lidar systems
Brignon, Arnaud; Richard, Sébastien; Georges, Marc ULg et al

Conference (2007, June)

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See detailAdaptive estimators of proficiency in adaptive testing
Blais, Jean-Guy; Raîche, Gilles; Magis, David ULg

Conference (2007, June)

Detailed reference viewed: 5 (2 ULg)
Peer Reviewed
See detailsimulators as research tools.
Nyssen, Anne-Sophie ULg

Conference (2007, June)

Detailed reference viewed: 10 (3 ULg)
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See detailLinear and Non-Linear Transonic Flow Behaviour of the Goland+ wing
Vio, Gareth Arthur; Dimitriadis, Grigorios ULg; Cooper, Jonathan Edward et al

in Proceedings of the 2007 International Forum on Aeroelasticity and Structural Dynamics (2007, June)

This paper is part of a study investigating the prediction of the aeroelastic behavior of aircraft subjected to transonic aerodynamic forces. The main objective of the work is the creation of Reduced ... [more ▼]

This paper is part of a study investigating the prediction of the aeroelastic behavior of aircraft subjected to transonic aerodynamic forces. The main objective of the work is the creation of Reduced Order Models from coupled Computational Fluid Dynamic and Finite Element calculations. The novelty of the approach lies in the identification of different types of Reduced Order Model in different flight regimes. Linear modal models are used in the Mach range range where the full CFD/CSD system is linear and nonlinear modal models in the transonic flight regime where the CFD/CSD system undergoes Limit Cycle Oscillations. Static solutions of the CFD/CSD system are used in order to determine the extent of the nonlinear Mach number range. The model treated in this work is a three-dimensional wing in a transonic flowfield. [less ▲]

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See detailA purely distributed implementation of undervoltage load shedding
Otomega, Bogdan; Glavic, Mevludin; Van Cutsem, Thierry ULg

(2007, June)

A new design of load shedding against long-term voltage instability is proposed. It uses a set of distributed controllers, each monitoring a transmission voltage and controlling a group of loads. Each ... [more ▼]

A new design of load shedding against long-term voltage instability is proposed. It uses a set of distributed controllers, each monitoring a transmission voltage and controlling a group of loads. Each controller acts in closed-loop, shedding amounts that vary in magnitude and time according to the evolution of its monitored voltage. The whole system operates without information exchange between controllers, the latter being implicitly coordinated through network voltages. The operation, design and robustness of the proposed scheme are illustrated through a small but realistic example. [less ▲]

Detailed reference viewed: 58 (7 ULg)
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See detailStructured covariance matrix estimation for the range-dependent problem in STAP
Neyt, Xavier; Druyts, Pascal; Acheroy, Marc et al

Conference (2007, June)

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See detailMesure de la distribution des phases dans une mousse métallique par radiographie et micro-tomographie à rayons X
Toye, Dominique ULg; Aferka, Saïd ULg; Calvo, Sébastien ULg et al

in Récents Progrès en Génie des Procédés - N°95 - Actes des 5èmes Journées francophones sur les réacteurs gaz-liquide et gaz-liquide-solide, 12-15 juin 2007, Carry-le-Rouet, France (2007, June)

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See detailEnergy audit of air conditioning systems
Andre, Philippe ULg; Hannay, Cl.; Hannay, J. et al

Conference (2007, June)

The work presented here consists in developing an audit methodology, with appropriate simulation tools and benchmarks. Several case studies are used to support, to test and to illustrate these ... [more ▼]

The work presented here consists in developing an audit methodology, with appropriate simulation tools and benchmarks. Several case studies are used to support, to test and to illustrate these developments. Each case study is described according to a standard format, in order to make the data easy to re-use in the future. The audit of the HVAC system consists in analyzing the information available about actual energy performances and in identifying the most attractive retrofit opportunities. Focus is given here to cooling energy consumption, but it could never be completely dissociated from heating requirements. An example of case study is presented in the paper to give a first idea of what could be the (difficult) task of the energy auditor. One of the main difficulties comes from the too many information lacks. Filling these lacks would require, in most case, more detailed energy records on site. Simulation models may help a lot, for a better interpretation of on site records and also for a safe identification of the most promising retrofit opportunities. Such models and examples of simulations are presented in the paper. [less ▲]

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See detailExperimental Study of Stall-Induced LCOs of Free Vibrating Wing
Li, Jing; Dimitriadis, Grigorios ULg

in Proceedings of the 2007 International Forum on Aeroelasticity and Structural Dynamics (2007, June)

Stall flutter is a limit cycle oscillation phenomenon occurring when all or part of the flow over a wing separates and re-attaches periodically. This paper reports on experimental investigations carried ... [more ▼]

Stall flutter is a limit cycle oscillation phenomenon occurring when all or part of the flow over a wing separates and re-attaches periodically. This paper reports on experimental investigations carried out on the subsonic stall flutter of a pitch plunge wing wind tunnel model. The object of the experiments was to investigate the aeroelastic effects of the nonlinearity introduced by boundary layer growth and flow separation and the ensuing stall-induced flutter, on a freely vibrating aeroelastic system. The motion of the wing and the pressure distribution around its surface were measured at various conditions. Three types of motion were observed, sometimes at the same wind tunnel airspeed; decay to equilibrium, symmetric limit cycle oscillations (LCO) and asymmetric LCOs. The aerodynamic mechanisms that give rise to these LCOs are described and analyzed. The effect of torsional wing stiffness on the stall flutter response of the wing is also investigated. Finally, repeating the experiments in a smaller wind tunnel showed that wind tunnel blockage has a significant effect on stall flutter. [less ▲]

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See detailTowards the industrialization of traditional African fermented foods : a case study of fortified gari in Benin
Egountlety, M.; Adjakidje, A. S.; Segbedji, C. M. et al

Poster (2007, June)

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See detailFirst-Principles Study of High-Pressure Phase Transitions and Thermal Properties of Al2O3
Xu, Bin ULg; Dong, Jianjun

Poster (2007, June)

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See detailClinical Cases. Workshop
Brichant, Jean-François ULg; Magnusson, L.

Conference (2007, June)

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See detailApproximate Numerical Continuation for Aeroelastic Systems Undergoing Aperiodic Limit Cycle Oscillations
Dimitriadis, Grigorios ULg

in Proceedings of the 2007 International Forum on Aeroelasticity and Structural Dynamics (2007, June)

This paper presents a modified numerical continuation approach for predicting the bifurcation behaviour of aeroelastic systems undergoing aperiodic limit cycles oscillations. Such oscillations can occur ... [more ▼]

This paper presents a modified numerical continuation approach for predicting the bifurcation behaviour of aeroelastic systems undergoing aperiodic limit cycles oscillations. Such oscillations can occur due to a number of nonlinear functions. Here, backlash nonlinearity in the aileron stiffness for a Generic Transport Aircraft is considered. It is shown that classical numerical continuation will fail due to the aperiodic nature of the limit cycles and the inability to perform period scaling and phase fixing. An alternative, approximate numerical continuation method is proposed, based on longer numerical integration sequences and a heuristic method for determining the period of the limit cycle oscillations. The approach is applied successfully to a simulated aeroelastic model of the Generic Transport Aircraft with backlash. [less ▲]

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See detailDuplication of the MYB oncogene in T-cell acute lymphoblastic leukemia
Lahortiga, Idoya; De Keersmaecker, Kim; Van Vlierberghe, Pieter et al

in Haematologica (2007, June), 92(Suppl. 1), 164

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See detailFriendly simulation of residential heating systems.
Andre, Philippe ULg; Georges, Bernard ULg; Lebrun, Jean ULg et al

Conference (2007, June)

Until now, the choice of a heating system is, in most cases, rather intuitive, but not based on significant comparisons among the many options available on the market. Friendly calculation tools are badly ... [more ▼]

Until now, the choice of a heating system is, in most cases, rather intuitive, but not based on significant comparisons among the many options available on the market. Friendly calculation tools are badly needed. A prototype of simulation model is shortly presented in this paper. It is designed as a preliminary design tool, allowing the different partners of a project to evaluate the energy impact of the very first design options: building envelope heat transfer coefficients, glazing areas, orientations, solar factors, ventilation mode, heat emission, distribution, generation and control strategy. The heating demand is calculated hour by hour with consideration to the time variations of inside and outside temperatures and free gains, to the control law and to the heating power actually available. The emitter is a water-ambient heat exchanger. It may have some thermal mass. Two emitters are here proposed: the radiator and the flow heating system. A steady state water distribution model is included in this simulation; it takes heat losses in unheated spaces into account: Three typical heating sources are proposed: classical boiler, condensing boiler and heat pump. All heat generators are here simulated with the help of very simple polynomial (“daughter”) models. The polynomial expressions are fitted on the simulation results obtained with reference (“mother”) models, themselves fitted on experimental data available. Examples of simulation results are presented in the paper. [less ▲]

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See detailDoes turbulence affect the habitat choice of Atlantic salmon parr?
Enders, Eva C; Ovidio, Michaël ULg; Roy, Mathieu L et al

Conference (2007, June)

Habitat preferences of Atlantic salmon parr are commonly described using mean flow velocity, water depth, and substrate as habitat variables, and a variety of habitat models have been developed using ... [more ▼]

Habitat preferences of Atlantic salmon parr are commonly described using mean flow velocity, water depth, and substrate as habitat variables, and a variety of habitat models have been developed using these variables to predict habitat quality. However, Atlantic salmon parr live in highly turbulent streams and rivers, in which intense fluctuations of flow velocity occur. Habitat preferences that consider the high variability of flow velocity have not been studied, and this although it has been shown in laboratory experiments that turbulence may affect the behavior and energetics of fish. Consequently, we studied the use of turbulent flow by Atlantic salmon parr in Patapédia River, Québec, Canada using radio-telemetry. We analyzed summer habitat preferences of individual parr in relation to several dynamic hydraulic variables such as standard deviation of flow velocity, turbulent kinetic energy, Froude number, and shear stress, and compared them with the habitat availability within the river reach. Our results revealed that in a natural flow environment, parr display a high individual variability in habitat preferences in relation to flow turbulence. Such heterogeneous habitat preferences suggest that individuals are not constrained to single habitat types and exhibit flexible habitat use. Furthermore, no differences were observed in habitat preferences between the four daily periods (dawn, day, dusk, and night) within individual parr. [less ▲]

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See detailLong term efficacy of strontium ranelate in reducing the risk of vertebral and non-vertebral including hip fractures in post menopausal osteoporotic women over 5 years
Reginster, Jean-Yves ULg; Brixen, Kim; Cormier, C. et al

in Annals of the Rheumatic Diseases (2007, June), 66(Suppl.II), 102

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See detailThe respiratory disabled patient: case discussion
Brichant, Jean-François ULg

Conference (2007, June)

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See detailTranscutaneous temporal electrotherapy in chronic migraine: a pilot study of short term efficacy and mode of action
Bolla, M.; De Pasqua, Victor ULg; Gérardy, Pierre-Yves ULg et al

in Cephalalgia : An International Journal of Headache (2007, June), 27(6), 743-744

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See detailInterictal cognition in migraineurs: a study correlating psychometric and neurophysiological tests
Magis, Delphine ULg; Coppola, G.; Di Clemente, L. et al

in Cephalalgia : An International Journal of Headache (2007, June), 27(6), 714

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See detailCooperative attitude synchronization in satellite swarms: a consensus approach
Sarlette, Alain ULg; Sepulchre, Rodolphe ULg; Leonard, Naomi

in Proceedings of the 17th IFAC Symposium on Automatic Control in Aerospace (2007, June)

The present paper considers the problem of autonomous synchronization of attitudes in a swarm of spacecraft. Building upon our recent results on consensus on manifolds, we model the spacecraft as ... [more ▼]

The present paper considers the problem of autonomous synchronization of attitudes in a swarm of spacecraft. Building upon our recent results on consensus on manifolds, we model the spacecraft as particles on SO(3) and drive these particles to a common point in SO(3). Unlike the Euler angle or quaternion descriptions, this model suffers no singularities nor double-points. Our approach is fully cooperative and autonomous: we use no leader nor external reference. We present two types of control laws, in terms of applied control torques, that globally drive the swarm towards attitude synchronization: one that requires tree-like or all-to-all inter-satellite communication (most efficient) and one that works with nearly arbitrary communication (most robust). [less ▲]

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See detailAcute peritonitis following rupture of a large rectal diverticulum in a dog
Saulnier-Troff, François-Guillaume; De Busscher, Virginie; Hamaide, Annick ULg

Poster (2007, June)

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See detailSugar beet : a source of biofuel an chemicals.
Destain, Jacqueline ULg; Gigot, Cédric ULg; Fauconnier, Marie-Laure ULg et al

Poster (2007, June)

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See detailEtude comparative de la qualité de vie chez des sujets déments, MCI et vulnérables
Missotten, Pierre ULg; Di Notte, David; Squelard, Gilles ULg et al

Poster (2007, June)

L’étude de la qualité de vie (QdV) des personnes démentes suscite de plus en plus d’intérêt. Son évaluation soulève de nombreuses interrogations concernant son évolution au cours du processus démentiel ... [more ▼]

L’étude de la qualité de vie (QdV) des personnes démentes suscite de plus en plus d’intérêt. Son évaluation soulève de nombreuses interrogations concernant son évolution au cours du processus démentiel. Les facteurs explicatifs demeurent encore controversés. Dans le cadre de l’étude Qualidem (Paquay et al., 2004), nous avons évalué, sur une période de deux ans, la QdV de sujets déments (n=362) avec l’Alzheimer Disease Related Quality of Life-ADRQL (Rabins et al., 1999). Leur QdV initiale a été comparée à celle de sujets MCI (n=36) et vulnérables (n=124). Majoritairement féminines, les trois populations se composent de sujets âgés de 65 ans et plus résidant en institution ou au domicile. L’analyse des scores ADRQL globaux ( /100) montre que la QdV du groupe « déments » (65.89±17.06) est significativement inférieure à celle des groupes « MCI » (82.11±13.31) et « vulnérables » (75.64±20.44). MCI et vulnérables ne se différencient pas entre eux. Les scores ADRQL du groupe « déments » ne sont pas en relation avec le sexe, l’âge et le lieu de résidence (domicile/institution). Ils sont corrélés avec l’état cognitif (MMSE, CAMCOG), la dépendance (AIVJ, AVQ), les troubles psychologiques et comportementaux (CERAD/BRSD) et le stade évolutif (CDR-M). Le MMSE et la CERAD/BRSD ont un rôle explicateur (25.92%) sur la variance du critère « qualité de vie ». Le suivi du groupe déments (n=127) met en évidence une absence de modifications significatives de la QdV sur une période de 2 ans. Par contre, une dégradation de l’état clinique (MMSE, AIVJ, AVQ, CDR-M) s’observe. Celle-ci s’accompagne d’une augmentation du pouvoir explicateur des variables du tableau clinique (MMSE et CDR/M). En conclusion, la QdV du groupe « déments » n’est pas très nettement inférieure à celle des groupes « MCI » et « vulnérables ». De plus, elle demeure relativement stable sur une période de 2 ans malgré la dégradation du tableau clinique. Ces résultats confortent l’hypothèse selon laquelle l’évolution de la QdV ne serait pas uniquement déterminée par des paramètres neurodégénératifs mais également par des variables en lien avec les environnements physique et social au sein desquels la personne démente vit sa maladie. [less ▲]

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See detailElaboration des olives vertes de table par voie biologique.
Ghabour, N.; Lamzira, Z.; Thonart, Philippe ULg et al

Poster (2007, June)

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See detailSearch for correlations between the therapeutic response to riboavin and migraine mitochondrial abnormalities
Coppola, Gianluca; Di Lorenzo, Cherubino; Magis, Delphine ULg et al

in Cephalalgia : An International Journal of Headache (2007, June), 27(6), 590

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See detailBasic Abstractions for an Autonomic Network Architecture
Jelger, Christophe; Tschudin, Christian; Schmid, Stefan et al

in First IEEE Workshop on Autonomic and Opportunistic Communications (2007, June)

The ANA (Autonomic Network Architecture) project aims at providing a framework to flexibly host, interconnect, and federate multiple heterogeneous networks in an autonomic way, i.e. without requiring ... [more ▼]

The ANA (Autonomic Network Architecture) project aims at providing a framework to flexibly host, interconnect, and federate multiple heterogeneous networks in an autonomic way, i.e. without requiring active human intervention. The guiding design principle is to strive for a maximum degree of flexibility at all levels of the architecture in order to inherently support heterogeneity and evolution. This paper describes the core abstractions and concepts of ANA (as defined during the first year of the project) and introduces their basic operation and interaction. While not autonomic themselves, the core architectural principles of ANA will enable autonomicity by not imposing a "one-size-fits-all" approach where protocols and paradigms are fixed by the architecture. We indeed argue that only the capacity of the network to be polyfunctional and fully adaptable will justify the label ' autonomic'. A prototype ofANA is currently being developed and will be released in 2008: the goal is to demonstrate the feasibility of autonomic networking within the 4 years of the project. [less ▲]

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See detailConfiance et commerce électronique: une problématique différenciée selon la nature des transactions
Lisein, Olivier ULg

Conference (2007, June)

Malgré la hausse sensible que connaît l’e-commerce, la problématique de la confiance afférente aux transactions électroniques reste d’actualité. Axée sur les choix des entreprises en matière d’e-business ... [more ▼]

Malgré la hausse sensible que connaît l’e-commerce, la problématique de la confiance afférente aux transactions électroniques reste d’actualité. Axée sur les choix des entreprises en matière d’e-business/e-commerce, notre contribution propose d’analyser l’influence qu’est susceptible de revêtir à cet égard la nature des transactions, vue sous les caractéristiques de spécificité des actifs et de récurrence de la relation (Williamson, 1975, 1985). Il en résulte quatre comportements distincts de la part des entreprises, en lien avec leur perception des enjeux liés à la confiance et au risque entourant les transactions électroniques. Basé sur l’analyse transversale d’une vingtaine d’études de cas, notre propos met ainsi en évidence des positionnements stratégiques contrastés et un recours à des mécanismes de protection différents suivant la spécificité des actifs échangés et la récurrence de la relation entretenue avec les cocontractants. [less ▲]

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See detailAdaptive estimators of trait level in adaptive testing: Some proposals
Raîche, Gilles; Blais, Jean-Guy; Magis, David ULg

in Weiss, David (Ed.) Proceedings of the 2007 GMAC Conference on Computerized Adaptive Testing (2007, June)

In a computerized adaptive test (CAT), we seek an acceptably accurate trait (θ) level estimate using an optimal number of items. Bayesian estimation methods like MAP and EAP are often used to compute that ... [more ▼]

In a computerized adaptive test (CAT), we seek an acceptably accurate trait (θ) level estimate using an optimal number of items. Bayesian estimation methods like MAP and EAP are often used to compute that estimate. Unfortunately, with such methods, decreasing the number of items generates bias whenever the true θ level differs significantly from the a priori estimate. Adaptive versions of the maximum a posteriori and expected a posteriori estimation methods are proposed to reduce this bias. These AMAP and AEAP methods adapt the a priori values used in the estimation function according to the previously computed θ estimate obtained from the previous administered item. The performance of AMAP and AEAP is evaluated in a CAT context. [less ▲]

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See detailGestion de la diversité : un enjeu stratégique ?
Cornet, Annie ULg; Delhaye, Christine ULg

Conference (2007, June)

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See detailEtude comparative de la qualité de vie de sujets déments en fonction de leur lieu de résidence et de leur état cognitif
Missotten, Pierre ULg; Di Notte, David; Thomas, Philippe et al

Poster (2007, June)

Classiquement, on affirme que la qualité de vie (QdV) des personnes démentes est meilleure au domicile qu’en institution. Toutefois, cette affirmation n’est guère étayée par des études comparatives ... [more ▼]

Classiquement, on affirme que la qualité de vie (QdV) des personnes démentes est meilleure au domicile qu’en institution. Toutefois, cette affirmation n’est guère étayée par des études comparatives utilisant un même instrument d’évaluation. En outre, il n’y a pas de consensus sur la nature des relations entre troubles cognitifs et QdV. Dans le cadre des études Qualidem (Paquay et al., 2004) et PIXEL (Thomas et al., 2006), la QdV de sujets déments et vulnérables a été évaluée au moyen de l’Alzheimer Disease Related Quality of Life (ADRQL; Rabins et al., 1999). Des analyses préliminaires ont démontré l’absence de différences significatives entre les populations Qualidem et PIXEL (variables âge, sexe, dépendance et QdV). L’échantillon total se compose de sujets majoritairement féminins âgés de 65 ans et plus. Tous les sujets déments ont un score MMSE compris entre 0 et 23 et sont répartis en 5 groupes: MMSE 0-3; 4-8; 9-13; 14-18 et 19-23. Tous les sujets vulnérables ont un score MMSE24 et se situent au stade évolutif normal de la Clinical Dementia Rating/Modified (CDR/M; Heymans et al., 1987). L’analyse des scores ADRQL ne met pas en évidence une diminution linéaire de la QdV en fonction de la sévérité des troubles cognitifs. Toutefois, le lieu de résidence influence le profil des scores. En institution (n déments=296; n vulnérables=12), ils diminuent au stade débutant de la démence (MMSE 19-23), se stabilisent dans les groupes MMSE 9-13 et 14-18 avant de s’abaisser fortement dans les groupe MMSE 4-8 et 0-3. Au domicile, (n déments=159; n vulnérables=14), on observe une phase de diminution dans les groupes MMSE 19-23 et 14-18 puis une phase de stabilisation dans les 3 derniers groupes. En conclusion, la QdV des sujets déments n’évolue pas linéairement en fonction de la dégradation de l’état cognitif. L’évolution différente des profils selon le lieu de résidence soulève la question de l’influence de la variable « informant » dans l’hétéro-évaluation de la QdV de personnes démentes. Au domicile, cet informant est l’aidant principal (soignant informel) alors qu’en institution, il s’agit d’un soignant formel. L’hypothèse de biais de surévaluation par le soignant formel et de sous-évaluation par le soignant informel peut donc être posée. [less ▲]

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See detailEffect of sexual genotype on the reproductive biology of the Nile tilapia, O.niloticus.
Rougeot, Carole ULg; Badiane, A. A.; Prignon, Christian ULg et al

Poster (2007, June)

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See detailRole of dynamic holography with photorefractive crystals in a multi-functional sensor for the detection of signature features in movable cultural heritage
Thizy, Cédric ULg; Georges, Marc ULg; Doulgeridis, M. et al

in Fotakis, C.; Pezzati, L.; Salimbeni, R. (Eds.) O3A: Optics for Arts, Architecture, and Archaeology (2007, June)

This paper is one of a series submitted by the Multi-Encode Project consortium and covers the development of holographic interferometry with dynamic photorefractive crystals. The aim of the first phase of ... [more ▼]

This paper is one of a series submitted by the Multi-Encode Project consortium and covers the development of holographic interferometry with dynamic photorefractive crystals. The aim of the first phase of the project is to assess the existing techniques for detection of signatures in various types of artworks. The trademark of our technique is a very high resolution in the fringe pattern. We will show the potentiality of our technique for the present application. [less ▲]

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See detailL’Inventaire Systémique de Qualité de Vie pour Enfants (ISQV-E©) : Premiers éléments de validation
Missotten, Pierre ULg; Lemétayer, Fabienne; Spitz, Elisabeth et al

Conference (2007, June)

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See detailSugar beet leaves as source of green notes.
Gigot, Cédric ULg; Rabetafika, Holy-Nadia ULg; Fauconnier, Marie-Laure ULg et al

Poster (2007, June)

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See detailCharacterising User Interactivity for Sports Video-on-Demand
Brampton, A.; MacQuire, A.; Rai, I. et al

in NOSSDAV Proceedings (2007, June)

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See detailSalmonella spp on the pig meat through the cold chain in Belgium
Delhalle, Laurent ULg; Desadeleer, L.; Daube, Georges ULg

Poster (2007, June)

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See detailPTH stability : preanalytical conditios influences for Liaison (Diasorin)
Cavalier, Etienne ULg; Delanaye, Pierre ULg; Carlisi, Ignazia ULg et al

in Clinical Chemistry & Laboratory Medicine (2007, June), 45

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See detailBehavioural tactics and spawning activity of rheophilic cyprinids radio-tracked in the transition zone between natural flow and minimum flow conditions
Ovidio, Michaël ULg; Guillaume, Nicolas; Hallot, Eric ULg et al

Conference (2007, June)

Using water resources for hydro-electricity production influences and limits the quality and quantity of habitat available for use by resident fishes. Changes in the fish community structure after setting ... [more ▼]

Using water resources for hydro-electricity production influences and limits the quality and quantity of habitat available for use by resident fishes. Changes in the fish community structure after setting minimum flow conditions have been more frequently studied than the behavioural adaptations of fish living in the vicinity of the disturbed river section. In the River Amblève (River Meuse basin, Belgium), a hydraulic power plant bypasses the river over a length of 10 km. Adult nase Chondrostoma nasus (n=10) and barbel Barbus barbus (n=8) were captured in the restitution zone of the turbinated flow several weeks before their reproduction periods. They were equipped with implant radio transmitters and manually and intensively tracked over several months to more than 1 year. The environmental conditions (water temperature and flow) as well as the geomorphology of the river were compared in both natural and flow-regulated sections. Nase and barbel demonstrated the capacity to map their contrasted environment and adapted their space and habitat utilisation as well as the choice of their spawning sites in relation with their specific biological characteristics and the environmental variations. The results are discussed in the context of the management of fish movements in flow-regulated rivers. [less ▲]

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