References of "Scientific congresses and symposiums"
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See detailInfluence of the resonator damping on its coupling with a slot-tone
Glesser, Martin; Billon, Alexis ULg; Valeau, Vincent et al

Conference (2005, July)

In ventilation systems, disturbing whistlings can occur at outlets. This whistling phenomenon belongs to the self-sustained tones class which can be produced when a low velocity flow impinges on a ... [more ▼]

In ventilation systems, disturbing whistlings can occur at outlets. This whistling phenomenon belongs to the self-sustained tones class which can be produced when a low velocity flow impinges on a downstream obstacle. The coupling of the tones with acoustic resonances (so-called indirect feedback path) can promote high-level harmonic noises. This experimental study deals with the coupling of a jet-slot oscillator, modelling a ventilation outlet, with the flow supply duct resonances. The flow supply duct is damped by using various amounts of acoustic damping foam, and the effect of this damping on the sound production is studied. It is shown that for a jet exit/obstacle distance higher than 2.5 jet height (L/H>2.5), the tone’s frequency matches satisfactorily with frequencies predicted by a model describing favourable phase relationships for the occurrence of tones along the feedback loop. When the flow supply duct is resonant, it is noticeable that the tone’s frequency occurs at a duct resonance frequency which is close to the frequency described by this model. For lower values of L/H (slot closer to the jet exit), a better knowledge of the convection velocity behaviour along the vortices path could improve the tone’s frequency prediction. The use of damping foam within the flow supply duct prevents the occurrence of the tones’ coupling with a duct resonance, especially with high amounts of damping material, and dramatically reduces the emitted acoustic levels. For moderate amounts of damping material, the suppression of coupling occurs only for higher flow speeds, as the tone’s frequencies are higher and the damping material is then more efficient. [less ▲]

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See detailDouble-pulsed holographic interferometry with photorefractive crystals
Georges, Marc ULg; Thizy, Cédric ULg; Lemaire, Philippe ULg et al

in Zhang, G.; Kip, D.; Nolte, D. (Eds.) et al Photorefractive Effects, Materials, and Devices (2005, July)

We present the achievement of the European PHIFE project (pulsed holographic interferometer for the analysis of fast events) and which consisted in the development of holographic head principles connected ... [more ▼]

We present the achievement of the European PHIFE project (pulsed holographic interferometer for the analysis of fast events) and which consisted in the development of holographic head principles connected to a YAG Q-switch double pulsed laser. An industrial prototype has been built with the aim of Hill-field out-of-plane displacement measurement at a high repetition rate. In parallel, a new double pulse laser with 25 Hz repetition rate, high energy (800 mJ/pulse in single pulse operation), variable delay between pulses (from 1 to 200 mu s) and based on a single cavity is studied [less ▲]

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See detailSurface effects of active folding, illustrated with examples from the TianShan
Hubert, Aurelia ULg; Suppe, J; Gonzalez-Mieres, J. et al

Conference (2005, July)

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See detailQualification of large reflectors in space environment with a holographic camera based on a BSO crystal
Thizy, Cédric ULg; Stockman, Yvan ULg; Lemaire, Philippe ULg et al

in Zhang, G.; Kip, D.; Nolte, D. (Eds.) et al Photorefractive Effects, Materials, and Devices (2005, July)

The next generation of infrared - sub mm space telescopes requires some reflectors with large dimensions and high quality. These ones, according to weight issues, are based on composite materials for ... [more ▼]

The next generation of infrared - sub mm space telescopes requires some reflectors with large dimensions and high quality. These ones, according to weight issues, are based on composite materials for which the behaviors at low temperatures are badly known. A holographic interferometry method for the verification and validation of this type of reflectors in a space environment is presented. It is based on a dynamic holographic camera observing a diffuser illuminated by the object beam coming from the reflecting surface. Photorefractive crystals being self-processing and reusable mediums, the measuring range of the holographic camera is increased with respect to other optical interferometric methods. The metrological certification of the whole system was realised by the measurement of a parabolic antenna with a 1.1 meter diameter, a known behavior and placed in a simulated space environment [less ▲]

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See detailValidation of a numerical diffusion equation-based modelling of the reverberated sound field in long rooms
Foy, Cédric; Billon, Alexis ULg; Valeau, Vincent et al

Conference (2005, July)

Many applications as corridors, railways tunnels or tube stations present a long room geometry. A fast and reliable modelling of such sound fields could be helpful for designers. In fact, the classical ... [more ▼]

Many applications as corridors, railways tunnels or tube stations present a long room geometry. A fast and reliable modelling of such sound fields could be helpful for designers. In fact, the classical statistical theory based on the assumptions of diffuse sound field is not applicable in such cases because the reverberant sound energy along the room is not uniform. In this study, several models assuming diffuse reflections of sound by walls are used for predicting the reverberant sound field in long rooms. Two models based on a diffusion equation for the energy density (one numerical and one analytical based on an image approach for describing the sound reflection at the corridor extremity) are compared with a radiosity model, and with a ray tracing software. Predictions are compared in terms of sound attenuation and reverberation time with measured data. The long rooms considered in this study were two rectangular corridors of lengths 20.3m and 47.3m. All models overestimate the attenuation, reaching 6dB for the numerical diffusion based model. When a part of specular reflection (30%) is added in the ray tracing model, the predicted sound attenuation matches with the measured one: even in case of rough surfaces, specular reflections cannot be totally excluded. For reverberation time, the agreement between predictions and experiments is good with fewer than 15% of discrepancy. The best predictions of the reverberation time were given by the diffusion models, with discrepancy less than 2% for the numerical model. So, it could be concluded that it is difficult to find a prediction method which is consistent both in terms of steady state and sound decay for the acoustics of long halls. [less ▲]

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See detailGender budgeting
Cornet, Annie ULg; Cecchini, Isabelle ULg

Conference (2005, July)

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See detailHistological study of equine interphalangeal joints
Toppets, Vinciane ULg; Pastoret, V.; Antoine, Nadine ULg et al

Poster (2005, July)

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See detailEfficacy and morbidity of a novel induction treatment for locally advanced NSCLC
Bosquee, Léon ULg; Rinken, Françoise ULg; Bustin, F. et al

in Lung Cancer (2005, July), 49(Suppl. 2), 78

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See detailThe digital soil map of Wallonia (DSMW/CNSW)
Veron, Philippe; Bah, Boubacar Billo ULg; Bracke, Charles et al

in The International Cartographic Association (ICA-ACI) (Ed.) XXII International Cartographic Conference (ICC2005), A Coruña, Spain, 11-16 July 2005 (2005, July)

Based on the Belgian soil map at 1/20,000, this digital map of Wallonia (DSMW) is composed of a cartographic database describing the soil characteristics of the region. Tool for a better soil management ... [more ▼]

Based on the Belgian soil map at 1/20,000, this digital map of Wallonia (DSMW) is composed of a cartographic database describing the soil characteristics of the region. Tool for a better soil management, this database will be integrated in a geographical information system where the soil layer could be used in relation with information concerning other aspects of land development. The different operations include : map drawing finalization of non edited sheets, creation of an image layer, vectorial capture of source objects, building up of the topology, characterization of the objects, geometrical corrections, creation of a continuous layer (edge-matching), creation of a homogeneous legend, integration in a geodatabase. The DSMW in figures corresponds to : 16,000 km2; 600,000 soil polygons delimited by 15 million intermediate points (vertex); 6,000 pedological symbols; 700MB. The advantages of this computerized cartographic database are continuity, legibility, accessibility and many possibilities of thematic analyses. [less ▲]

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See detailOn an Extended Irreversible Thermodynamic description of transient heat conduction in nano structures
Lebon, Georgy ULg; Dauby, Pierre ULg; Grmela, M.

in Proceedings of the 2d IEEES Conference (2005, July)

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See detailThe Digital Soil Map of Wallonia (Southern Belgium). A tool for better soil management
Bah, Boubacar Billo ULg; Veron, Philippe; Bracke, Charles et al

Conference (2005, July)

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See detailApplication of the component method to structural joints with dowel fasteners in timber construction
Ly, Dong Phuong Lam ULg; François, N.; Mertens, A. et al

in Aoki, Tetsuhiko; Itoh, yoshito (Eds.) Proceedings of the first international conference on advances in experimental structural engineering (2005, July)

A general procedure for the evaluation of the mechanical properties of structural joints, named “component method” [01], is now available from intensive research works at the European level. This ... [more ▼]

A general procedure for the evaluation of the mechanical properties of structural joints, named “component method” [01], is now available from intensive research works at the European level. This procedure allows the analytical prediction of the resistance, but also of the stiffness and the deformation capacity, of structural joints under external forces (axial or shear forces, bending moments, …). In the present paper, timber joints with dowel fasteners are considered. Two components may be identified: the “dowel fastener in bending and shear” and the “timber member in embedding”. [less ▲]

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See detailPROPULSION AND VEHICLE INTEGRATION FOR REUSABLE LAUNCHER USING IN-FLIGHT OXYGEN COLLECTION
Bizzarri, Didier; Hendrick, Patrick; Heyen, Georges ULg et al

in EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES (EUCASS) (2005, July)

The use of in-flight Oxygen Collection has shown to significantly improve space launcher performance. The conceptual approach followed by the Royal Military Academy of Brussels (RMA) has tried to widen ... [more ▼]

The use of in-flight Oxygen Collection has shown to significantly improve space launcher performance. The conceptual approach followed by the Royal Military Academy of Brussels (RMA) has tried to widen the available design margins in order to reduce the required technological leap and limit the economical risk associated with such a development. The aim of the ESA-funded theoretical and experimental study on an air separation device is to demonstrate the possibility of performing efficient air distillation in a compact rotating column. An integration of the vehicle, propulsion system and separation unit designs is presented aiming to optimise the overall vehicle performance while keeping technological difficulty and system complexity at a reasonable level. Reference vehicles are presented in their specific mission profiles with an emphasis on TSTO’s. Different layouts of the internal energy and mass flowsheets have been studied and were compared in order to make best use of the refrigeration capacity of the hydrogen fuel running though the propulsion system during the first phase of the flight considering the separator as a classical distillation column. This analysis provides the requirements in terms of heat exchange capacity, compression ratios and number of so-called transfer units needed in the separator. Here, the system is intentionally kept simple, to limit complexity, but the analysis is thorough and accurate, including, for example, the effect of the presence of argon. Results for a supersonic carrier are presented. An analysis of the separation unit to reach those requirements has been performed. That includes internals, practical building with estimates of pressure drop, separation performance and flow limitation. The sizing of the separator bed is provided for a carrier plane showing that such on-board separator is indeed practical. [less ▲]

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See detailExperience from a large multi-centre expanded access programme (EAP) with gefitinib ('Iressa', ZD1839) as monotherapy in advanced non-small cell lung cancer (NSCLC)
van Puijenbroek, R.; Bosquee, Léon ULg; Tits, G. et al

in Lung Cancer (2005, July), 49(Suppl. 2), 273

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See detailThe use of tomography to determine the kinetics of water vapour adsorption
Lodewyckx, Peter; Léonard, Angélique ULg; Blacher, Silvia ULg

in Proceedings of Carbon 2005 – The International Carbon Conference (2005, July)

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See detailScavenger amphipod crustaceans from Antarctic deep-sea: composition, distribution and ecofunctional role.
De Broyer, Claude; Nyssen, Fabienne; Dauby, Patrick ULg

Poster (2005, July)

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See detailThe major allergens in Russian atopic asthmatic patients.
Gusareva, Elena ULg; Bragina, Elena; Deeva, Evgenia et al

Poster (2005, July)

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See detail"'Saint Nicolas et les enfants au saloir: a Pseudo-Popular Gem of the Traditional Repertoire?"
Peere, Isabelle ULg

Conference (2005, July)

A tentative reassessment of the traditional character of Gérard de Nerval's record of the famous song in the light of earlier records of the song in French and European tradition from the medieval ... [more ▼]

A tentative reassessment of the traditional character of Gérard de Nerval's record of the famous song in the light of earlier records of the song in French and European tradition from the medieval tradition to the present [less ▲]

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See detailIdentification of cis-regulatory elements controlling two differentially expressed Pit-1 genes in the duplicated genome of Cyprinus carpio
Kausel, G. M.; Castro, L. A.; Vera, T. S. et al

in FEBS Journal (2005, July), 272(Suppl. 1), 469-470

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See detailThe status of imams in Europe
Husson, Jean-François ULg

Conference (2005, June 29)

In relation to various researches I had carried out for the King Baudouin Foundation on possible developments regarding imams training in Belgium, EPC and KBF have set up this international conference ... [more ▼]

In relation to various researches I had carried out for the King Baudouin Foundation on possible developments regarding imams training in Belgium, EPC and KBF have set up this international conference with European academics and policy makers to broaden the debate and discuss various national situations. [less ▲]

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See detailScreening of noble metal and transition metal oxide catalysts for the removal of VOCs, N-VOCs and S-VOCS
Cellier, Caroline; Lambert, Stéphanie ULg; Gaigneaux, Eric et al

Poster (2005, June 29)

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See detailBioencapsulated peptides : preparation and application for wound healing
Markvicheva, E; Stashevskaya, K; Grandfils, Christian ULg

in Proceeding Meeting BRG 2005 (2005, June 24)

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See detailFEEDING SELECTIVITY OF THE ROTIFER BRACHIONUS CALYCIFLORUS: EVIDENCE OF THE ROLE OF CHEMICAL CUES.
Joaquim-Justo, Célia ULg; Ayala-Andrés, N; Thomé, Jean-Pierre ULg

Poster (2005, June 19)

The rotifer Brachionus calyciflorus is a ubiquitous species that often dominates river zooplankton. It has been described as a species that selects its food mainly on the basis of the size of food ... [more ▼]

The rotifer Brachionus calyciflorus is a ubiquitous species that often dominates river zooplankton. It has been described as a species that selects its food mainly on the basis of the size of food particles and not on the basis of their taste. Nevertheless, experiments carried out with a green algae, 3,5 microns in diameter, showed that the ingestion rate of rotifers on DTAF (5-(4,6-dichlorotriazin-2-yl)aminofluorescein) stained algae is much lower than on untreated algae. The impact of all steps of the staining procedure was tested to determine the factor that elicits a negative selection against stained algae. Moreover, impact of algal abundance and light on selection was tested. Results clearly show the selection is triggered by chemical cues, DTAF itself inducing the strongest avoidance. Algal abundance influenced the degree of selectivity of rotifers; analysis of ingestion rate of treated and untreated algae throughout all treatments provide information on selection mechanisms and support the hypothesis that B. calyciflorus can detect chemical cues in the buccal funnel, even when feeding on small preys, and select its food accordingly. [less ▲]

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See detailLeast Construction Cost of FSO Offshore Structures and LNG Gas Carriers
Rigo, Philippe ULg; Matagne, Jérôme ULg; Caprace, Jean-David ULg

in ISOPE, The fifteenth International Offshore and Polar Engineering Conference, Seoul (2005, June 19)

In this paper, scantling optimization a FSO offshore structure and a medium size capacity LNG gas carrier are presented. Optmization is based on the LBR5 least cost optimization package. Main originality ... [more ▼]

In this paper, scantling optimization a FSO offshore structure and a medium size capacity LNG gas carrier are presented. Optmization is based on the LBR5 least cost optimization package. Main originality and advantage is to combine the minimization of the construction cost with the preliminary design stage. The optimum scantling (least cost) is determined at the earliest design stage, this means before the signature of the contract. Cost savings of 5 to 10% are currently recorded. Relevant information on the methodology and applications to a FSO unit and a LNG carrier are presented in the paper. [less ▲]

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See detailWhich peridialysis blood pressure best predicts interdialytic level?
Bataille, Yoann ULg; Saint-Remy, Annie ULg; Godon et al

Poster (2005, June 18)

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See detailBiogeocehmical study of a coccolithophore bloom at the continental margin in the Northeast Atlantic
Harlay, Jérôme ULg; van der Zee, Claar; Schiettecatte, Laure-Sophie et al

Conference (2005, June 14)

Coccolithophores, among which Emiliania huxleyi (Ehux) is the most abundant and widespread species, are the dominant calcifying phytoplankton in the temperate zone of the world’s oceans. The continental ... [more ▼]

Coccolithophores, among which Emiliania huxleyi (Ehux) is the most abundant and widespread species, are the dominant calcifying phytoplankton in the temperate zone of the world’s oceans. The continental margin in the Northern Bay of Biscay (North Atlantic Ocean) was visited in June 2004 during a multidisciplinary investigation of a late-spring bloom dominated by Ehux. Field sampling was assisted by daily transmission to the RV Belgica of remote sensing images, indicating the bloom development in the area. Primary production and calcification were measured by 14C incubations and zooplankton grazing experiments were performed. Vertical distributions of transparent exopolymer (TEP) concentration and bacterial density, as well as the bacterial production in surface waters, were also determined to elucidate the fate of biogenic carbonate production. The organic and inorganic carbon fluxes are evaluated in terms of relevant processes and discussed in relation with the DIC and nutrient dynamics. [less ▲]

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See detailMaladie d'Alzheimer: Prise en charge cognitive des troubles de la mémoire
Adam, Stéphane ULg

Conference (2005, June 09)

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See detailEmploi d'outils décisionnels et de pilotage de la fumure en région wallonne
Destain, Jean-Pierre ULg; Godden, Bernard; Luxen, Pierre et al

in Soudi, Brahim; Debouche, Charles; Krim, Lhassan (Eds.) et al Gestion environnementale de l'agriculture (2005, June 09)

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See detailEcriture et travail sur soi chez Sartre
Cormann, Grégory ULg

Conference (2005, June 09)

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See detailLa coopération inter-universitaire dans les domaines du transport et de la logistique: l'expérience tuniso-belge
Marchal, Jean ULg

(2005, June 03)

L’objectif principal de la collaboration inter-universitaire concernée est d’assurer un transfert de connaissances, permettant de participer au développement socio-économique de la Tunisie et de la région ... [more ▼]

L’objectif principal de la collaboration inter-universitaire concernée est d’assurer un transfert de connaissances, permettant de participer au développement socio-économique de la Tunisie et de la région du Maghreb par la création d’un centre d’enseignement et de formation en transport et logistique. Le projet de coopération permet le développement de trois types de formation : - L’une de nature plus ciblée par la réalisation de stages de formation spécifiques qui permet un premier contrôle des aptitudes des futurs enseignants - La deuxième de nature académique par le développement d’un mastère en transport et logistique - La troisième de nature professionnelle par le développement également d’un mastère spécialisé dans le même domaine Ces formations doivent contribuer notamment à la prise de conscience de l’extrême nécessiter de s’inscrire dans une politique de transport intermodal s’articulant autour de plates-formes intermodales afin d'accroître principalement la mobilité des biens industriels et des produits agricoles dans un souci constant de préservation de l'environnement. [less ▲]

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See detailSemi-crystalline polymer thin films: preparation, processing and peculiar features
Voccia, Samuel; Gilbert, Bernard ULg; Jérôme, Robert ULg et al

Poster (2005, June 01)

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See detailFullerene containing (co)polymers for biomedical applications
Stoilova, Olya; Detrembleur, Christophe ULg; Jérôme, Christine ULg et al

Conference (2005, June 01)

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See detailCOSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses
Courbin, F.; Eigenbrod, A.; Vuissoz, C. et al

in Mellier, Y.; Meylan, G. (Eds.) Gravitational Lensing Impact on Cosmology (2005, June 01)

We describe a new project aiming at measuring time delays for most known lensed quasars, from optical light curves obtained with five (almost) dedicated 1-2 m telescopes in the Northern and Southern ... [more ▼]

We describe a new project aiming at measuring time delays for most known lensed quasars, from optical light curves obtained with five (almost) dedicated 1-2 m telescopes in the Northern and Southern hemispheres. The goal is to evaluate the Hubble constant H[SUB]0[/SUB] with a precision below 2%. We present here numerical simulations in order to define the optimal temporal sampling in our observations as a function of typical quasar variations, object visibility, and for a given accuracy on the individual photometric points. It is also emphasized that the ongoing effort to obtain deep imaging using both space and ground based facilities must be continued, as illustrated by the comparison of HST and VLT near-IR images of the `cloverleaf': H 1413+117. [less ▲]

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See detailATRP of aminated methacrylates: a route to effective antimicrobial surfactants, coatings and additives
Lenoir, Sandrine; Pagnoulle, Christophe; Detrembleur, Christophe ULg et al

Conference (2005, June 01)

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See detailElectrografting of poly(ethylene glycol) acrylate: a novel one-step strategy for protein repellent surfaces
Gabriel, Sabine ULg; Dubruel, P.; Schacht, Etienne et al

Conference (2005, June 01)

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See detailSynthesis and characterization of electrically conducting polyester foams
Maquet, Véronique; Gabriel, Sabine ULg; Garrais, Solange et al

Poster (2005, June 01)

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See detailBiosensors based on electrochemically prepared polyanilines
Halusiak, Emilie; Jérôme, Robert ULg; Jérôme, Christine ULg

Poster (2005, June 01)

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See detailSynthesis and foaming of polymer nanocomposites and microspheres in supercritical CO2
Urbanczyk, Laetitia ULg; Grignard, Bruno ULg; Stassin, Fabrice et al

Poster (2005, June 01)

Detailed reference viewed: 6 (2 ULg)
See detailSynthesis of novel functional PEO as builiding block for biomaterials
Rieger, Jutta ULg; Bernaerts, K.; Qiiu, Hongjin et al

Poster (2005, June 01)

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See detailCombination of electrografting with controlled polymerization: building of anti-bacterial surfaces
Voccia, Samuel; Ignatova, Miléna; Gilbert, Bernard ULg et al

Conference (2005, June 01)

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See detailABC triblock copolymers for pH sensitive micelles
Willet, Nicolas ULg; Gohy, Jean-François; Varshney, Sunil et al

Poster (2005, June 01)

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See detailSynthesis of polymer nanocomposites and microspheres in supercritical carbon CO2
Urbanczyk, Laetitia ULg; Grignard, Bruno ULg; Stassin, Fabrice et al

Poster (2005, June 01)

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See detailFunctionlization of biodegradable aliphatic polyesters by mannose-residue for the design of surface-modified polymeric nanoparticles
Rieger, Jutta ULg; Stoffelbach, François; Stoilova, Olya et al

Conference (2005, June 01)

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See detailSynthesis and characterization of electrically conducting polyester/MWNTs nanocomposite foams
Garrais, Solange; Maquet, Véronique; Jérôme, Christine ULg et al

Poster (2005, June 01)

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See detailFirst-Principles Study of High-Pressure Phase Transitions in Si3N4
Xu, Bin ULg; Dong, Jianjun

Poster (2005, June)

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See detailAcquisition of face-name associations in Early Alzheimer's Disease: A Comparison of Different Methods
Bier, Nathalie; Gagnon, Lise; Van der Linden, Martial et al

in Alzheimer's & Dementia : The Journal of the Alzheimer's Association (2005, June), 1(1), 60

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See detailWhole-body barometric plethysmography in healthy dogs : influence of jet nebulizer and bias flow rate on the results of a bronchoprovocative test
Talavera, J.; Bernaerts, Frederique ULg; Schuller, S. et al

in ACVIM Meeting - Baltimore (USA) - juin 2005 (2005, June)

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See detailInfluence of residual alpha-amylase activity on the pasting properties of extracted wheat starch.
Lenartz, Jonathan; Sinnaeve, Georges; Massaux, Carine et al

Poster (2005, June)

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See detailEfficient Algorithms for Large-Scale Topology Discovery
Donnet, Benoît ULg; Raoult, Philippe; Friedman, Timur et al

in ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems (2005, June)

There is a growing interest in discovery of internet topology at the interface level. A new generation of highly distributed measurement systems is currently being deployed. Unfortunately, the research ... [more ▼]

There is a growing interest in discovery of internet topology at the interface level. A new generation of highly distributed measurement systems is currently being deployed. Unfortunately, the research community has not examined the problem of how to perform such measurements efficiently and in a network-friendly manner. In this paper we make two contributions toward that end. First, we show that standard topology discovery methods (e.g., skitter) are quite inefficient, repeatedly probing the same interfaces. This is a concern, because when scaled up, such methods will generate so much traffic that they will begin to resemble DDoS attacks. We measure two kinds of redundancy in probing (intra- and inter-monitor) and show that both kinds are important. We show that straightforward approaches to addressing these two kinds of redundancy must take opposite tacks, and are thus fundamentally in conflict. Our second contribution is to propose and evaluate Doubletree, an algorithm that reduces both types of redundancy simultaneously on routers and end systems. The key ideas are to exploit the tree-like structure of routes to and from a single point in order to guide when to stop probing, and to probe each path by starting near its midpoint. Our results show that Doubletree can reduce both types of measurement load on the network dramatically, while permitting discovery of nearly the same set of nodes and links. [less ▲]

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See detailImplication of Peyer’s patches dendritic cells in prion diseases.
Dorban, G.; Defaweux, Valérie ULg; Demonceau, C. et al

Poster (2005, June)

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See detailGlobal prevalence and skeletal implications of vitamin D inadequacy
Reginster, Jean-Yves ULg; Richy, Florent; Rabenda, Véronique ULg et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 362

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See detailOptimal synthesis of mechanisms using time-varying dimensions and natural coordinates
Collard, Jean-François; Fisette, Paul; Duysinx, Pierre ULg

in Herskowitz, José (Ed.) Proceedings of the 6th World Congress of Structural and Multidisciplinary Optimization (WCSMO6) (2005, June)

This paper presents a simple approach to optimize the dimensions and the positions of 2D mechanisms for path or function-generator synthesis. The proposed method is particularly adapted to assembled ... [more ▼]

This paper presents a simple approach to optimize the dimensions and the positions of 2D mechanisms for path or function-generator synthesis. The proposed method is particularly adapted to assembled mechanisms since time-varying dimensions always satisfy the assembly conditions which may represent a real difficulty when dealing with closed-loop mechanisms. The objective is to minimize the strain energy of the bars - considered as flexible - of the mechanism when this one follows perfectly the desired path. Two optimization strategies are developed and criticized. The first one is based on separated optimizations of design parameters and point coordinates. The second one is more global and is performed in two stages : multiple local synthesis are needed first to find the initial point coordinates, and then a global synthesis stage is undertaken to find both the best dimensions and coordinates. The use of natural coordinates is also particularly interesting since the only non linear functions to optimize are distance functions, and the objective function is rather well-conditioned for a gradient-based optimizer. The question of finding the global optimum is addressed and discussed. Since a standard genetic algorithm may fail to find it, a different approach is proposed: exploring the design space to find several local optima among which the designer will choose the most relevant one taking other design constraints into account. A simple technique is applied which consists in running multiple optimization processes starting from uniformly-distributed initial dimensions (full-factorial design of experiments) across the parameter space. Three applications are presented: a simple four-bar path synthesis to illustrate the optimization strategies, a four-bar steering linkage synthesis for function generation – Ackermann relation to highlight the limits of both strategies, and eventually a six-bar steering mechanism to explore the design space and find different local optima. [less ▲]

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See detailObservation n°5 (cas particulier de Parsonage & Turner)
Wang, François ULg; Kaux, Jean-François ULg; Dive, Dominique ULg

in Correspondances en Nerf & Muscle (2005, June), (Numéro spécial), 20-23

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See detailHuygens attitude reconstruction based on flight engineering parameters
Perez-Ayucar, Miguel; Sarlette, Alain ULg; Couzin, Patrice et al

Conference (2005, June)

Huygens is ESA’s main contribution to the joint NASA/ESA/ASI Cassini/Huygens mission to Saturn and its largest moon Titan. The Probe, delivered to the interface altitude of 1270 km above the surface by ... [more ▼]

Huygens is ESA’s main contribution to the joint NASA/ESA/ASI Cassini/Huygens mission to Saturn and its largest moon Titan. The Probe, delivered to the interface altitude of 1270 km above the surface by NASA/JPL Cassini orbiter, entered the dense atmosphere of Titan on 14 January 2005 and landed on the surface after a descent under parachute of slightly less than 2.5 hours. Huygens continued to function after landing for more than 3 hours. Data was transmitted and successfully recovered by Cassini continuously during the parachute descent and for 72 minutes on the surface. Although the Huygens attitude reconstruction based on the flight engineering parameters was not foreseen during the development phase (no gyros were included), a rough descent under parachute and indications of an anomaly in the probe spin direction make the engineering dataset valuable in the frame of the ADRS (Huygens Attitude Determination and Reconstruction Subgroup) as a complement to the scientific measurements. In addition, several scientific teams have a strong interest in understanding the orientation of the probe for interpreting their data, as DISR (Descent Imager and Spectral Radiometer) and HASI-PWA (Huygens Atmospheric Structure Instrument-Permeability, Wave and Altimetry). In this paper we describe the engineering parameters used for the Probe attitude reconstruction (Clausen et al., 2002), namely the radio link AGC (Automatic Gain Control), RASU and CASU (Radial and Central Accelerometer Sensor Units) and RAU (Radar Altimeter Unit). We explain the methodology applied to indirectly infer the attitude information from the measurements of these sensors. We also discuss and present the reconstructed information related to attitude: spin rate and azimuthal position (during the atmospheric descent), and landing orientation. Tip and tilt implications are still being worked at the time of writing. Preliminary data on their behavior is presented. [less ▲]

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See detailDaily changes in the expression of the steroid receptor coactivator SRC-1
Charlier, T. D.; Ball, G. F.; Balthazart, Jacques ULg

in Hormones & Behavior (2005, June), 48(1), 93

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See detailQuasi steady-state models for long-term voltage and frequency dynamics simulation
Grenier, Marie-Eve; Lefebvre, Daniel; Van Cutsem, Thierry ULg

(2005, June)

The Quasi Steady-State (QSS) approximation of long-term dynamics relies on time-scale decomposition and consists of replacing faster phenomena by their equilibrium conditions, in order to reduce the ... [more ▼]

The Quasi Steady-State (QSS) approximation of long-term dynamics relies on time-scale decomposition and consists of replacing faster phenomena by their equilibrium conditions, in order to reduce the complexity of the whole model and increase the computation efficiency of time simulations. This paper describes the extension of a QSS model extensively used in long-term voltage stability studies, to readily incorporate the frequency dynamics that takes place over the same time scale. This extended QSS model relies on a common-frequency assumption. Its advantages, limitations and possible improvements are discussed through simulation results on the Hydro-Québec system, where it has been compared to full time scale simulations. Disturbances with an impact on either frequency or voltages are considered and the coupling between these two aspects of long-term dynamics is briefly discussed. [less ▲]

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See detailDifferences in neural activation following expression of appetitive and consummatory male sexual behavior in the quail brain
Taziaux, Mélanie ULg; Cornil, Charlotte ULg; Dejace, C. et al

in Hormones & Behavior (2005, June), 48(1), 130

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See detailA unified finite element framework for the dynamic analysis of controlled flexible mechanisms
Bruls, Olivier ULg; Duysinx, Pierre ULg; Golinval, Jean-Claude ULg

in Proceedings of the ECCOMAS Conference on Advances in Computational Multibody Dynamics (2005, June)

This paper proposes a unified formalism for the simulation of mechatronic systems with complex flexible mechanisms. The equations of motion are formulated using a nonlinear Finite Element approach for the ... [more ▼]

This paper proposes a unified formalism for the simulation of mechatronic systems with complex flexible mechanisms. The equations of motion are formulated using a nonlinear Finite Element approach for the mechanism, and the block diagram language for the control system. The set of strongly coupled equations of motion is constructed numerically, and integrated in the time domain using the generalized-alpha method. Convergence and stability properties are thus guaranteed for the simulation algorithm. Two illustrative examples are treated in the fields of vehicle dynamics and robotics respectively. [less ▲]

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See detailReduction in the risk of back pain persists at least 30 months after discontinuation of teriparatide treatment: a meta-analysis
Reginster, Jean-Yves ULg; Nevitt, M. C.; Chen, P. et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 521

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See detailIntravenous ibandronate injections are at least as effective as daily oral ibandronate: consistent effect across subgroups
Reginster, Jean-Yves ULg; Stepan, J. J.; Halse, J. et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 365

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See detailLarge group teaching: the distance learning solution?
Pasleau, Françoise ULg; Doseray, Patrick; Fairon, Nicolas ULg et al

Poster (2005, June)

Problem-based learning has been introduced at the University of Liège for four years now. The medical library was committed with the organisation of different activities (60 hours/2 years), starting with ... [more ▼]

Problem-based learning has been introduced at the University of Liège for four years now. The medical library was committed with the organisation of different activities (60 hours/2 years), starting with the control of basic computer litteracy, continuing with an analysis of the structure of the different document types used for scientific communication as well as the discovery of both traditional and electronic medical libraries, to end with guidelines for information retrieval. Such courses requested new approaches and several difficulties had to be taken into consideration including : 1. The transfer of skills rather than kowledge. Some theoretical bases have to be taught before practicing. But the students mostly need to be challenged with different situations requesting different approaches of litterature searching. 2. The course is given before the students feel the need of it. The librarians enconter the students during the first semester of the second year before the students are asked to search the medical litterature to build their own knowledge about clinical matters. 3. The absence of motivation. Second year medical students are focused on major courses in basic and preclinical sciences. 4. Large group teaching (n ≥ 300). All the sections of the medical Faculty are concerned. 5. Inadequate logistic support. Small sized computer rooms do not allow the organization of very many parallel hand-on sessions. 6. Insufficient teaching staffs. Distance learning tools were used to develope online activities complementary to face to face teaching. They are focused on practice. Links to the theory are provided but only when they are indispensable. Many quizzes are also proposed in order to trigger critical mind and auto-evaluation. By January 2005, a first cycle will be completed from the beginning of the course to the final examination. We plan to survey students from every section in order to evaluate the impact of this new teaching strategy. Their observations will be reported as well as our conclusions and suggestions for possible improvements. [less ▲]

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See detailOnce-monthly and daily oral ibandronate are at least as effective in improving proximal femur BMD in postmenopausal osteoporosis: 12-month data from MOBILE
Reginster, Jean-Yves ULg; Lorenc, R.; Stepan, J. J. et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 93

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See detailPreseason isokinetic intervention as a preventive strategy for hamstring injury in professional soccer players
Croisier, Jean-Louis ULg; Ganteaume, S.; Ferret, J. M.

in British Journal of Sports Medicine (2005, June), 39(6), 379

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See detailOn-Line Transient Engine Diagnostics in a Kalman Filtering Framework
Borguet, Sébastien ULg; Dewallef, Pierre ULg; Léonard, Olivier ULg

in Proceedings of the ASME Turbo Expo 2005 (2005, June)

A common assumption made in the performance assessment of a turbine engine for aircraft propulsion consists in restricting the data processing to steady-state data. This especially holds for on-board ... [more ▼]

A common assumption made in the performance assessment of a turbine engine for aircraft propulsion consists in restricting the data processing to steady-state data. This especially holds for on-board performance monitoring of a commercial aircraft which spends up to 90% of the time in cruise flight where such conditions are satisfied. The present contribution is intended to investigate the ability of a diagnosis method to process unsteady data rather than steady-state data. The aim of this unsteady approach is to strongly reduce the time and the efforts spent to obtain a reliable diagnosis. In order to assess the improvements in terms of diagnosis efficiency and engine operability, the resulting diagnostic method is tested for different degradations that can be expected on commercial turbofans. The results are also compared to those obtained from cruise flight steady-state data in order to balance the two approaches. [less ▲]

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See detailDetection and characterization of Vibrio parahaemolyticus in seafood using real time PCR.
Bradatan G; China B; Daube, Georges ULg

Poster (2005, June)

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See detailUpper gastrointestinal safety and tolerability profile of once-monthly and daily oral ibandronate is similar in postmenopausal osteoporosis: 1-year results from MOBILE
Adami, Silvio; Tanko, L. B.; Nuti, R. et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 364

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See detailTestosterone-induced singing is regulated by social status in male canaries (serinus canaria)
Carere, C.; Boseret, Géraldine ULg; Ball, G. F. et al

in Hormones & Behavior (2005, June), 48(1), 92

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See detailAn interior point method based optimal power flow
Capitanescu, Florin ULg; Glavic, Mevludin; Wehenkel, Louis ULg

(2005, June)

This paper deals with the solution of an optimal power flow (OPF) problem by the interior point method (IPM). The latter is a very appealing approach to this nonlinear programming problem due to its speed ... [more ▼]

This paper deals with the solution of an optimal power flow (OPF) problem by the interior point method (IPM). The latter is a very appealing approach to this nonlinear programming problem due to its speed of convergence and ease of handling inequality constraints. Two interior point algorithms are presented and compared: the pure primal-dual and the predictor-corrector. Several implementation aspects of these IPM algorithms are also discussed. The OPF is formulated in rectangular coordinates which confers some significant advantages because generally its objective and constraints are quadratic functions. Among the large variety of OPF objectives, emphasis is put on two classical ones: the minimization of generation cost and the minimization of transmission active power losses. The solution obtained by both algorithms proves to be robust for the two OPF sub-problems (optimization of active power flows and reactive power flows) as well as for a full OPF applied to the former objective, which is unanimously recognized as the hardest problem to solve. Finally, numerical results on three test systems ranging from 60 to 300 buses are provided. [less ▲]

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See detailAnalyse des causes d'incidents et d'accidents
Nyssen, Anne-Sophie ULg

Conference (2005, June)

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See detailStrontium ranelate reduces the risk of vertebral fractures in osteoporotic postmenopausal women whatever the baseline vertebral fractures status
Roux, Christian; Fardellone, P.; Fechtenbaum, Jacques et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 359

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See detailApplication of a novel oscillatory flow screening micro-reactor to a biotransformation in a two-phase medium
Vicente, A.; Reis, N.; Nobre, C. et al

in Biochemical engineering : frontiers and advances in biotechnology, biological and biomolecular engineering : abstracts”. [S.n. : s.l.] (2005, June)

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See detailComparison of the Huygens mission and the SM2 test flight for Huygens attitude reconstruction
Sarlette, Alain ULg; Perez-Ayucar, Miguel; Witasse, Olivier et al

Conference (2005, June)

The Huygens probe is the ESA’s main contribution to the Cassini/Huygens mission, carried out jointly by NASA, ESA and ASI. It was designed to descend into the atmosphere of Titan on January 14, 2005 ... [more ▼]

The Huygens probe is the ESA’s main contribution to the Cassini/Huygens mission, carried out jointly by NASA, ESA and ASI. It was designed to descend into the atmosphere of Titan on January 14, 2005, providing surface images and scientific data to study the ground and the atmosphere of Saturn’s largest moon. In the framework of the reconstruction of the probe’s motions during the descent based on the engineering data, additional information was needed to investigate the attitude and an anomaly in the spin direction. Two years before the launch of the Cassini/Huygens spacecraft, in May 1995, a test probe called SM2 (Special Model 2) was dropped in the Earth’s atmosphere from the balloon launch site of Kiruna, Sweden, to verify proper operation during the descent and especially the parachute deployment sequence. It featured a flight standard structure and DCSS (Descent Control SubSystem) and, unlike the Huygens probe, was fully instrumented to monitor the orientation of the descent module (3-axes accelerometers and gyroscopes). We describe how a comparison between the SM2 test flight and the Huygens mission provides some useful information about the Huygens probe’s behavior. After discussing the spin direction, we focus on the tip and tilt. The final conclusions of this comparison at the time of writing are still of qualitative nature, but the results are a starting point for better interpretation of the engineering data in terms of attitude to derive the probe’s orientation. [less ▲]

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See detailTwo-year efficacy and tolerability of once-monthly oral ibandronate in postmenopausal osteoporosis: the MOBILE study
Cooper, C.; Delmas, P. D.; Felsenberg, D. et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 68

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See detailFlutter Clearance of a Non-linear aircraft
Benini, Guilherme; Vio, Gareth Arthur; Dimitriadis, Grigorios ULg et al

in Proceedings of the 2005 International Forum on Aeroelasticity and Structural Dynamics (2005, June)

Flight flutter testing is always carried out under the assumption that aircraft are linear. Recently, this assumption has started to come under question, especially as far as military aircraft are ... [more ▼]

Flight flutter testing is always carried out under the assumption that aircraft are linear. Recently, this assumption has started to come under question, especially as far as military aircraft are concerned. This paper deals with possible methodologies for flight flutter testing of aircraft that are no longer assumed linear. Simulated flight testing is performed for a simple non-linear aeroelastic system with cubic stiffness. The flutter speeds predicted using some of the classical linear flutter prediction methods as well as a non-linear method are compared. It is shown that, for non-linear system undergoing Hopf Bifurcations, classical linear flutter prediction can predict the flutter envelope with reasonable accuracy. However, fully non-linear system identification and stability analysis can not only predict the flutter point but also determine whether it is a linear or non-linear flutter point (i.e. whether divergent or Limit Cycle Oscillations will ensue). Additionally, the non-linear method can predict the amplitudes of LCOs that will occur post-critically. The application of the nonlinear method was successful for noise free data, but the problem of noise corruption still needs further investigation. [less ▲]

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See detailDistribution of Reelin and its cytoplasmic signaling protein, DAB-1 in the forebrain of male canaries
Boseret, Géraldine ULg; Ball, G. F.; Balthazart, Jacques ULg

in Hormones & Behavior (2005, June), 48(1), 90

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See detailMulti-frequency passive non-linear targeted energy transfers in systems of couples oscillators
Tsakirtzis, Stylianos; Panagopoulos, Panagiotis; Kerschen, Gaëtan ULg et al

in 5th GRACM International Congress on Computational Mechanics, Limassol, 2005 (2005, June)

We study the dynamics of a system of coupled linear oscillators with a multi-DOF end attachment with essential (nonlinearizable) stiffness nonlinearities. We show numerically that the multi-DOF attachment ... [more ▼]

We study the dynamics of a system of coupled linear oscillators with a multi-DOF end attachment with essential (nonlinearizable) stiffness nonlinearities. We show numerically that the multi-DOF attachment with damping can passively absorb broadband energy from the linear system in a one-way, irreversible fashion, acting in essence as nonlinear energy sink (NES). Strong passive targeted energy transfer from the linear to the nonlinear subsystem is possible, over wide frequency and energy ranges. We numerically demonstrate that the topological structure of the periodic orbits in the frequency – energy plane of the underlying hamiltonian system greatly influences the strength of targeted energy transfer in the damped system, and governs to a great extent the overall transient damped dynamics. This work may be regarded as a contribution towards proving the efficacy the utilizing essentially nonlinear attachments as passive broadband boundary controllers. [less ▲]

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See detailUne position d'expert: "grand ensemblier"
Semal, Nathalie ULg

Conference (2005, June)

La mise en oeuvre de la norme ISO 14001 ne constitue pas un face à face entre le texte normatif et son usager, l'entreprise. Elle est le plus souvent accompagnée par des experts du conseil en management ... [more ▼]

La mise en oeuvre de la norme ISO 14001 ne constitue pas un face à face entre le texte normatif et son usager, l'entreprise. Elle est le plus souvent accompagnée par des experts du conseil en management environnemental, qui définissent leur position comme celle d'un "grand ensemblier". L'objectif de la communication est d'explorer cette métaphore. Leurs modes d'intervention contribue à insérer la démarche de l'entreprise dans un réseau de relations multiples et hétérogènes. [less ▲]

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See detailExamination of the non-palpable cryptorchid testis
Waltregny, David ULg

Conference (2005, June)

La cryptorchidie affecre environ 1 garçon sur 150 et dans près de 20% des cas, la gonade n'est pas palpée. Lorsqu'il est présent, le testicule non palpable est situé entre l'orifice externe du canal ... [more ▼]

La cryptorchidie affecre environ 1 garçon sur 150 et dans près de 20% des cas, la gonade n'est pas palpée. Lorsqu'il est présent, le testicule non palpable est situé entre l'orifice externe du canal inguinal et le pôle inférieur du rein. Souvent cependant, lors de l'exploration chirurgicale, on constate l'existence de reliquats tissulaires à l'extrémité de vaisseaux spermatiques borgnes sans que l'on puisse reconnaître à proprement parler un testicule: on parle alors de testicule absent. Dans d'autres cas, on ne trouve pas de trace de vaisseau spermatique, de structure épidydimo-déférentielle ou encore de tissu testiculaire; il s'agit d'agénésie gonadique. Le testicule non palpé présente un risque accru d'infertilité, de transformation maliine, de hernies et malformations épididymo-déférentielles associées. Le traitement chirurgical est souvent plus complexe et les échecs plus fréquents. De nombreuses techniques d'imagerie ont été proposées comme modalités diagnostiques pour localiser le/les testicule(s) non palpé(s) (pneumopéritonéographie, angiographie, ultrasonographie, tomodensitométrie computérisée, RMN) mais aucune d'elles, à ce jour, n'est uniformément acceptée en raison du manque de fiabilité à détecter le testicule recherché et/ou des dangers potentiels résultant de leur emploi. Depuis la description par Cortesi en 1976 de l'utilisation de la cælioscopie pour la localisation du testicule impalpable, un intérêt croissant a été porté par les urologues et les chirurgiens pédiatriques à cette technique qui aujourd'hui joue un rôle central dans l'exploration du testicule cryptorchide non palpé. Les auteurs tentent d'établir une méthodologie algorythmique d'investigation des testicules cryptorchides non palpés à la lumière des données anatomiques, pathologiques et chirurgicales récentes de la littérature. [less ▲]

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