References of "Scientific congresses and symposiums"
     in
Bookmark and Share    
Peer Reviewed
See detailEtude du colmatage dans un bioréacteur membranaire à recirculation externe utilisé en nitrification partielle
Kouakou, Edouard; Pirard, Jean-Paul ULg; Marchot, Pierre ULg et al

in Proceedings of MEMPRO 3 - Intégration des membranes dans les procédés (2006)

Detailed reference viewed: 31 (2 ULg)
Full Text
Peer Reviewed
See detailControl of floral transition in maize
Van Kerkhoven, Fabrizio ULg; Jennès, Nicolas; Périlleux, Claire ULg

in Comparative Biochemistry & Physiology Part A : Molecular & Integrative Physiology (2006), 143(4), 170

Detailed reference viewed: 13 (3 ULg)
Peer Reviewed
See detailBiomarqueurs et Biosignatures: synthèse de l'Atelier de Dourdan 22-24 Mars 2006
Vandenabeele-Trambouze; Alekina, I.; Benzerara, K. et al

Poster (2006)

Detailed reference viewed: 4 (1 ULg)
See detailAnalysis of Ser-His-Glu triad in alpha-amylases
Marx, Jean Claude; Feller, Georges ULg

Poster (2006)

Detailed reference viewed: 8 (1 ULg)
Peer Reviewed
See detailRole of lipopeptides in the biological control activity of Bacillus subtilis
Ongena, Marc ULg; Jourdan, E.; Adam, A. et al

Conference (2006)

Detailed reference viewed: 14 (5 ULg)
Full Text
See detailNumber-Set Representations for Infinite-State Verification
Boigelot, Bernard ULg

in Proceedings of VISSAS 2005 (2006)

In order to compute the reachability set of infinite-state models, one needs a technique for exploring infinite sequences of transitions in finite time, as well as a symbolic representation for the finite ... [more ▼]

In order to compute the reachability set of infinite-state models, one needs a technique for exploring infinite sequences of transitions in finite time, as well as a symbolic representation for the finite and infinite sets of configurations that are to be handled. The representation problem can be solved by automata-based methods, which consist in representing a set by a finite-state machine recognizing its elements, suitably encoded as words over a finite alphabet. Automata-based set representations have many advantages: They are expressive, easy to manipulate, and admit a canonical form. In this survey, we describe two automata-based structures that have been developed for representing sets of numbers (or, more generally, of vectors): The Number Decision Diagram (NDD) for integer values, and the Real Vector Automaton (RVA) for real numbers. We discuss the expressiveness of these structures, present some construction algorithms, and give a brief introduction to some related acceleration techniques. [less ▲]

Detailed reference viewed: 10 (2 ULg)
See detailThe use of spatial pattern analysis to support landscape planning and biological conservation.
Bogaert, Jan ULg

in The use of spatial pattern analysis to support landscape planning and biological conservation. Proceedings of the International Conference on Ecological restoration in East Asia, (2006)

Detailed reference viewed: 8 (1 ULg)
Full Text
See detailPARTICIPATION OF UNDERGRADUATE STUDENTS TO THE SOLAR PANELS DESIGN OF THE EDUCATIONAL SPACECRAFT ESEO
Bolland, M.; Collignon, G.; Vandenplas, X. et al

Conference (2006)

The objective of this presentation is to discuss the participation of students at the University of Liège to the educational spacecraft project SSETI-ESEO proposed by the European Space Agency.

Detailed reference viewed: 18 (3 ULg)
Peer Reviewed
See detailEuropean design recommendations for simple joints in steel structures
Jaspart, Jean-Pierre ULg

in Proceedings of the International Conference on Stability and Ductility of Steel Structures (2006)

Detailed reference viewed: 52 (1 ULg)
Full Text
See detailAn Overview of Targeted Energy Transfer Phenomena in Coupled Oscillators: Theoretical and Experimental Results and System Identification
Lee, Young S.; Kerschen, Gaëtan ULg; McFarland, D. M. et al

in 11th Nonlinear Vib., Stability and Dynamics of Structures Conf., Blacksburg, 2006 (2006)

Detailed reference viewed: 71 (0 ULg)
Full Text
Peer Reviewed
See detailTowards a standard protocol for community-driven organizations of knowledge
Zhou, Chao; Lejeune, Christophe ULg; Bénel, Aurélien

in Ghodous, Parisa; Dieng, Rose; Loureiro, Geilson (Eds.) Leading the Web in Concurrent Engineering (2006)

This paper deals with the “Web 2.0”, where every user can contribute to the content, “harnessing collective intelligence”. After studying what makes the success of services like Google Base, Del.icio.us ... [more ▼]

This paper deals with the “Web 2.0”, where every user can contribute to the content, “harnessing collective intelligence”. After studying what makes the success of services like Google Base, Del.icio.us and the Open Directory Project, we propose a unifying “REST” protocol for this kind of community-driven organizations of knowledge. The aim is to make the collaboration possible beyond the boundaries of the software and of the resulting communities. [less ▲]

Detailed reference viewed: 116 (10 ULg)
Full Text
See detailToward a fundamental understanding of the HHT in nonlinear structural dynamics
Kerschen, Gaëtan ULg; Vakakis, Alexander F.; Lee, Y. S. et al

in 24th International Modal Analysis Conference, Saint-Louis, 2006 (2006)

The Hilbert-Huang transform (HHT) has been shown to be effective for characterizing a wide range of nonstationary signals in terms of elemental components through what has been called the empirical mode ... [more ▼]

The Hilbert-Huang transform (HHT) has been shown to be effective for characterizing a wide range of nonstationary signals in terms of elemental components through what has been called the empirical mode decomposition. The HHT has been utilized extensively despite the absence of a serious analytical foundation, as it provides a concise basis for the analysis of strongly nonlinear systems. In this paper, we attempt to provide the missing link, showing the relationship between the EMD and the slow-flow equations of the system. The slow-flow model is established by performing a partition between slow and fast dynamics using the complexification-averaging technique, and a dynamical system described by slowly-varying amplitudes and phases is obtained. These variables can also be extracted directly from the experimental measurements using the Hilbert transform coupled with the EMD. The comparison between the experimental and analytical results forms the basis of a nonlinear system identification method, termed the slow-flow model identification method, which is demonstrated using numerical examples. [less ▲]

Detailed reference viewed: 34 (1 ULg)
Peer Reviewed
See detailFlight Simulator with IR and MMW Radar Image Generation Capabilities
Bonjean, Maxime E.; Lapierre, Fabian D.; Schiefele, Jeff et al

Conference (2006)

Detailed reference viewed: 8 (0 ULg)
Full Text
See detailDevelopment of Numerical Algorithms for Practical Computation of Nonlinear Normal Modes
Peeters, Maxime ULg; Georgiades, Fotios; Viguié, Régis ULg et al

in International Conference on Noise and vibration Engineering, Leuven, 2006 (2006)

When resorting to numerical algorithms, we show that nonlinear normal mode (NNM) computation is possible with limited implementation effort, which paves the way to a practical method for determining the ... [more ▼]

When resorting to numerical algorithms, we show that nonlinear normal mode (NNM) computation is possible with limited implementation effort, which paves the way to a practical method for determining the NNMs of nonlinear mechanical systems. The proposed method relies on two main techniques, namely a shooting procedure and a method for the continuation of NNM motions. In addition, sensitivity analysis is used to reduce the computational burden of the algorithm. A simplified discrete model of a nonlinear bladed disk is considered to demonstrate the developments. [less ▲]

Detailed reference viewed: 58 (9 ULg)
Peer Reviewed
See detailLe Roman en prose de Guillaume d’Orange et le milieu bourguignon
Henrard, Nadine ULg

in Ott, Muriel (Ed.) L’épopée médiévale et la Bourgogne (2006)

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailRegulation by androgens of EGF receptor family members in prostate cancer cells
Pignon, Jean-Christophe; Delacroix, Laurence ULg; Waltregny, David ULg et al

in Proceedings of the American Association for Cancer Research (2006)

After an initial positive response to anti-androgen treatment, prostate cancer (PCa) cells usually become hormone-refractory in spite of their persistent expression of the androgen receptor (AR ... [more ▼]

After an initial positive response to anti-androgen treatment, prostate cancer (PCa) cells usually become hormone-refractory in spite of their persistent expression of the androgen receptor (AR). Overexpression of tyrosine kinase receptors in androgen-deprived PCa cells, such as those of the EGF receptor (EGFR) family, may be responsible for AR activation and growth of androgen-deprived tumours. Our goal is to understand the control of the expression of the EGFR family members by androgens in PCa. Hormone response was compared in hormone-sensitive LNCaP and hormone-insensitive DU145 PCa cell lines. These cells do not express ErbB4. EGFR, erbB2 and erbB3 protein half-life is much longer in DU145 than in LNCaP cells grown in complete medium. Dihydrotestosterone (DHT) modulates EGFR and erbB2 transcript and protein levels only in LNCaP cells. ErbB3 is not an androgen-responsive gene. EGFR mRNA and protein levels are increased while erbB2 mRNA and protein levels are decreased after DHT treatment of cells cultured in steroid-deprived medium. ErbB2 mRNA and protein levels are increased in LNCaP cells following DHT withdrawal. In order to understand the mechanisms by which androgens control the expression of EGFR and ERBB2 genes, half lifes of the corresponding mRNAs and proteins were compared in cells grown in presence or absence of DHT. The effect of DHT on EGFR gene expression is complex. Indeed, DHT stabilizes the protein. Moreover, a superinduction of EGFR mRNA was observed in cells treated with cycloheximide (CHX) before addition of the hormone, suggesting an effect on transcript stability. In contrast, erbB2 mRNA and protein stability was not affected by DHT. CHX treatment for 2h before addition of DHT suppresses the androgen-induced down-regulation of erbB2 mRNA levels. In summary, androgen-mediated regulation of EGFR and ERBB2 genes expression is complex. DHT influences EGFR gene transcription, mRNA and protein stability. DHT does not affect erbB2 mRNA and protein stability but acts indirectly on transcription. Current experiments are undertaken to verify these observations by Chromatin-IP experiments on both genes promoters. [less ▲]

Detailed reference viewed: 51 (3 ULg)
See detailRole of Sox 10 in the development of the inner ear
Bodson, M; Breuskin, I; Thelen, Nicolas ULg et al

Poster (2006)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailTwo different techniques for the evaluation of concrete surface roughness
Courard, Luc ULg; Perez, Fabien; Bissonnette, Benoît et al

in Beushausen, H.; Dehn, F.; Alexander, M. G. (Eds.) Concrete Repair, Rehabilitation and Retrofitting (2006)

The study of adhesion of repair materials on concrete structures implies a good knowledge of the influence of concrete surface treatment. The effects of surface preparation technique is rarely clearly ... [more ▼]

The study of adhesion of repair materials on concrete structures implies a good knowledge of the influence of concrete surface treatment. The effects of surface preparation technique is rarely clearly described and parameterised: it is consequently difficult to point out the real influence of roughness on adhesion results. A first step was made by using mechanical profilometry to differentiate concrete surfaces prepared by shot blasting, sand blasting and hand or mechanical milling. This technique is very accurate for investigations in laboratory, on a limited surface area. If Quality Control is requested or if it is impossible to core samples from the site, other procedures should be followed. That the reason why opto-morphometry analysis has been developed, in order to analyse larger surfaces. The comparison of the two techniques shows clearly the advan-tages of each one and the precision that can be achieved. [less ▲]

Detailed reference viewed: 75 (1 ULg)
Full Text
Peer Reviewed
See detailL’apport des chartes originales antérieures à 1271 conservées au dépôt des Archives de l’État de Liège (Belgique) pour la datation du lexique français
Mazziotta, Nicolas ULg

in Buchi, Eva (Ed.) Actes de la Journée d’étude « Lexicographie historique française : autour de la mise à jour des notices étymolo- giques du Trésor de la langue française informatisé » (Nancy/ATILF, 4 novembre 2005) (2006)

Detailed reference viewed: 15 (2 ULg)
Peer Reviewed
See detailHistone deacetylase HDAC8 associates with smooth muscle alpha–actin and is essential for smooth muscle cell contractility
Glénisson, Wendy; Waltregny, David ULg; Tran, Syv Li et al

Conference (2006)

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
See detailQuand l'écriture devient texture de l'image
Dondero, Maria Giulia ULg

in Visible (2006), 2

Cet article porte sur un corpus de photographies écrites et peintes et concerne les relations (contractuelles et contrastives) entre texte photographique, écriture manuelle et gestualité picturale ... [more ▼]

Cet article porte sur un corpus de photographies écrites et peintes et concerne les relations (contractuelles et contrastives) entre texte photographique, écriture manuelle et gestualité picturale. L’écriture dans l’image est étudiée comme : 1) stratégie d’authentification de l’objet-photo (autographie de l’objet photographique unique), 2) comme notation, 3) comme gestualité, 4) comme effet-texture de l’image. L’écriture entendue comme stratégie d’authentification du texte photographique permet de réfléchir sur la problématique de l’original, de la reproductibilité et du statut hybride de la photographie écrite, à mi-chemin entre autographie et allographie (« texte autographique à objet multiple »). [less ▲]

Detailed reference viewed: 128 (8 ULg)
Peer Reviewed
See detailNormalization of transcranial magnetic stimulation points by means of atlas registration
Zosso, D.; Noirhomme, Quentin ULg; Davare, M. et al

in Proceedings of 14th European Signal Processing Conference (2006)

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
See detailModel predictive control and reinforcement learning as two complementary frameworks
Ernst, Damien ULg; Glavic, Mevludin; Capitanescu, Florin ULg et al

in Proceedings of the 13th IFAC Workshop on Control Applications of Optimisation (2006)

Model predictive control (MPC) and reinforcement learning (RL) are two popular families of methods to control system dynamics. In their traditional setting, they formulate the control problem as a ... [more ▼]

Model predictive control (MPC) and reinforcement learning (RL) are two popular families of methods to control system dynamics. In their traditional setting, they formulate the control problem as a discrete-time optimal control problem and compute a suboptimal control policy. We present in this paper in a unified framework these two families of methods. We run for MPC and RL algorithms simulations on a benchmark control problem taken from the power system literature and discuss the results obtained. [less ▲]

Detailed reference viewed: 110 (6 ULg)
Full Text
Peer Reviewed
See detailOn multi-area security assessment of large interconnected power systems
Wehenkel, Louis ULg; Glavic, Mevludin; Ernst, Damien ULg

in Proceedings of the Second Carnegie Mellon Conference in Electric Power Systems: Monitoring, Sensing, Software and its Valuation for the Changing electric Power Industry (2006)

The paper introduces a framework for information exchange and coordination of security assessment suitable for distributed multi-area control in large interconnections operated by a team of transmission ... [more ▼]

The paper introduces a framework for information exchange and coordination of security assessment suitable for distributed multi-area control in large interconnections operated by a team of transmission system operators. The basic idea of the proposed framework consists of exchanging just enough information so that each operator can evaluate the impact in his control area of contingencies both internal and external to his area. The framework has been thought out with the European perspective in mind where it is presently not possible to set up a transnational security coordinator that would have authority to handle security control over the whole or part of the European interconnection. Nevertheless, it can also be considered as an approach to handle security control in North-American Mega-RTOs, where it could help to circumvent problems of scalability of algorithms and maintainability of data by distributing them over the TSOs under the authority of the RTO. [less ▲]

Detailed reference viewed: 36 (0 ULg)
Full Text
Peer Reviewed
See detailComparative responses to sodium selenite and Sel-Plex® organic selenium supplements in Belgian Blue cows and calves
Guyot, Hugues ULg; Rollin, Frédéric ULg; Andrieu, Sylvie et al

in Nutritional Biotechnology in the Feed and Food Industries (Alltech’s 22nd Annual Symposium) (2006)

Detailed reference viewed: 38 (7 ULg)
Full Text
Peer Reviewed
See detailLa notion de biens
Vanbrabant, Bernard ULg; Lecocq, Pascale ULg; sagaert, vincent

in Leleu, Yves-Henri (Ed.) Rapports belges au XVIIème colloque de l'Académie internationale de droit comparé (2006)

Detailed reference viewed: 123 (12 ULg)
Peer Reviewed
See detailEtude de la sensibilité à la douleur : comparaison entre populations contrôle et fibromyalgique
Maquet, Didier ULg; Demoulin, Christophe ULg; Croisier, Jean-Louis ULg et al

in Revue du Rhumatisme (2006), 73

Introduction : Le seuil de sensibilité à la douleur (SSD) peut être apprécié à partir de la pression minimale induisant une perception nociceptive. Ce seuil s’objective aisément en pratique clinique par ... [more ▼]

Introduction : Le seuil de sensibilité à la douleur (SSD) peut être apprécié à partir de la pression minimale induisant une perception nociceptive. Ce seuil s’objective aisément en pratique clinique par une mesure dolorimétrique. Le but de ce travail consiste à comparer, à partir d’une mesure dolorimétrique, le SSD de sujets contrôles et fibromyalgiques et, d’autre part, d’établir des valeurs normatives. Patients et méthodes : Cent sujets contrôles (50 féminins et 50 masculins) et 20 patientes fibromyalgiques sont inclus dans l’étude. Le SSD des 18 points sensibles définis par le Collège Américain de Rhumatologie dans le cadre des critères de classification de la fibromyalgie est mesuré à partir d’un dolorimètre électronique. La pression transmise est augmentée graduellement au rythme de 1 kg/cm² chaque seconde et ce, jusqu’à l’apparition d’une véritable douleur, et non plus d’une simple sensibilité. Le SSD (en kg/cm²) des 9 points spécifiques bilatéraux est déterminé et un score myalgique s’établit par l’addition de ceux-ci. Un test-retest réalisé à 3 jours d’intervalle apprécie la reproductibilité intra-examinateur des SSD. Résultats : Les coefficients de variation correspondent respectivement à 17 % et 13 % chez les sujets contrôles féminins et masculins, et 24 % chez les fibromyalgiques. La reproductibilité apparaît la plus favorable pour les points « fessier » et « genou ». Les SSD s’avèrent significativement inférieurs chez les sujets contrôles féminins en comparaison des volontaires masculins (p < 0,01) et aucun effet de latéralité n’est constaté. Les SSD mesurés chez les fibromyalgiques demeurent systématiquement inférieurs (réduction de 60 %) à ceux de la population contrôle (p < 0,0001). Les SSD les plus faibles sont mesurés aux points « trapèze », « occiput », « cervical antérieur » et « 2ème côte » tant chez les sujets contrôles que fibromyalgiques. Le score myalgique atteint 20 + 7,4 kg/cm² et 49,9 kg/cm² respectivement chez les patients fibromyalgiques et chez les sujets contrôles féminins. Discussion : Une mesure dolorimétrique permet d’objectiver le SSD avec une reproductibilité satisfaisante. Ce travail démontre des valeurs de SSD particulièrement faibles chez les fibromyalgiques. De façon originale, nous objectivons, chez les sujets contrôles, particulièrement de sexe féminin, des SSD souvent inférieurs au seuil décrit par l’ACR (4 kg/cm²). Conclusion : L’établissement d’un score myalgique permet d’apprécier, à partir d’une mesure dolorimétrique, la sensibilité nociceptive et offre la possibilité d’un suivi longitudinal du patient en terme de douleur. [less ▲]

Detailed reference viewed: 177 (19 ULg)
Peer Reviewed
See detailSound production mechanism in Amphiprion clarkii (Teleostei: Pomacentridae)
Colleye, Orphal ULg; Herrel, Anthony; Vandewalle, Pierre ULg et al

Poster (2006)

In the family Pomacentridae, six genera were reported as sound producers: Amphiprion, Dascyllus, Stegastes, Chromis, Abudefduf and Plectroglyphidodon. The anemonefishes (Amphiprioninae) live in social ... [more ▼]

In the family Pomacentridae, six genera were reported as sound producers: Amphiprion, Dascyllus, Stegastes, Chromis, Abudefduf and Plectroglyphidodon. The anemonefishes (Amphiprioninae) live in social group in association with sea anemones, which protect them from predators. Their sound emissions seem involved in courtship and territorial defense, contributing to both survival and reproductive success. However, the mechanism of sound production is unresolved. It has been hypothesized that it involves swimbladder or the action of the pharyngeal jaws amplified by swimbladder. The aim of this study was to understand the sonic mechanism involved in the agonistic sounds in Amphiprion clarkii. The approach consists in high-speed cineradiography and functional morphology. During agonistic sounds (pops), fishes perform different movements such as skull elevation, pectoral girdle retraction, hyoid lowering and mouth closing. Pops are produced when the hyoid is completely lowered and the mouth closed. The simultaneous realization of these movements was never observed in teleost. In Amphiprion sp., it is possible due to an additional ligament inserted on the hyoid bar and on the inner lower jaw. The hyoid lowering combined to the closing (and thus the elevation) of the mandible could generate a tension of the ligament, provoking its vibration [less ▲]

Detailed reference viewed: 11 (1 ULg)
Peer Reviewed
See detailGilles of Binche and Processional Giants and Dragons in Belgium and France : Evolution and Social Impacts
Lempereur, Françoise ULg

in Proceedings of the 2006 International Conference on Intangible Cultural Heritage of Daija Matsu (2006)

The Carnival of Binche and the Processional giants and dragons of Mons and Ath are the first Belgian elements recognized as Masterpieces of the Oral and Intangible Cultural Heritage of Humanity by UNESCO ... [more ▼]

The Carnival of Binche and the Processional giants and dragons of Mons and Ath are the first Belgian elements recognized as Masterpieces of the Oral and Intangible Cultural Heritage of Humanity by UNESCO. This communication introduced them and thinks about the importance of this heritage and about the dangers that get to it. [less ▲]

Detailed reference viewed: 58 (3 ULg)
Full Text
Peer Reviewed
See detailDIGE application to investigate aphid adaptation to resistant host plant
Francis, Frédéric ULg; Goggin, Fiona; Guillonneau, François et al

in Abstract book (2006)

Detailed reference viewed: 13 (2 ULg)
Peer Reviewed
See detailPersistent Ischemic Mitral Regurgitation After Annuloplasty can be Predicted by Pre-operative Echocardiography.
Sénéchal, M; Magne, Julien ULg; Pibarot, P et al

Conference (2006)

Detailed reference viewed: 1 (0 ULg)
Peer Reviewed
See detailVaccination against dermatophytosis in domestic animals : Past, present and future
Mignon, Bernard ULg; Vermout, S.; Tabart, J. et al

Conference (2006)

Detailed reference viewed: 28 (9 ULg)
Full Text
Peer Reviewed
See detailColl2-1, Coll2-1 NO2 and myeloperoxydase in OA patients before and after hip or knee replacement
Deberg, M; Labasse, A; Quettier, E et al

in Osteoporosis International (2006)

Detailed reference viewed: 6 (1 ULg)
Peer Reviewed
See detailPotential of electrical imaging to constrain saltwater intrusion models: 2D numerical simulations
Kemna, A.; Nguyen, Frédéric ULg; Antonsson, A. et al

(2006)

Detailed reference viewed: 24 (7 ULg)
Peer Reviewed
See detailDetermination of Vs-models for the Basel region: Comparison between Array measurements, SASW and S-wave reflection
Havenith, Hans-Balder ULg; Polom, Ulrich; Fäh, Donat et al

in Geophysical Research Abstracts (2006)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailBreed-cross pregnancies increased plasmatic pregnancy-associated glycoprotein (PAG) concentration in pregnant Neospora-seropositive dairy cows
López-Gatius, Fernando; Garbayo, J. M.; Serrano, B. et al

in Reproduction in Domestic Animals (2006), 41(suppl 2), 112

Detailed reference viewed: 33 (4 ULg)
Full Text
See detailLarge-scale groundwater flow and transport modelling : Methodology and application to the Geer basin, Belgium
Orban, Philippe ULg; Dassargues, Alain ULg; Brouyère, Serge ULg

in Stauffer, Fr.; Dassargues, Alain (Eds.) Quantitative Geology from Multiple Sources: S10 Use of multiple sources in conditioning/calibrating groundwater flow and transport models (2006)

Efficient and sustainable management of water resources should be considered from an integrated way, at the basin scale. For that purpose, physically-based, spatially distributed modelling tools has ... [more ▼]

Efficient and sustainable management of water resources should be considered from an integrated way, at the basin scale. For that purpose, physically-based, spatially distributed modelling tools has turned to be very useful. If regional groundwater flow model have been developed for years now, large scale contaminant transport models are still almost inexistent. The objective of this extended abstract is to present briefly new concepts for large transport modelling, more particularly a modelling approach, the Hybrid Finite Element Mixing Cell (HFEMC) developed by the Hydrogeology Group of the University of Liège and implemented in the 3D simulator SUFT3D. First steps for the application to the Geer basin are also presented. [less ▲]

Detailed reference viewed: 45 (17 ULg)
Peer Reviewed
See detailHybridization and polyploidy: driving forces of evolutionary processes in the Fallopia spp complex
Vanderhoeven, Sonia ULg; Saad, Layla ULg; Tiébré, Marie-Solange et al

Conference (2006)

Detailed reference viewed: 11 (0 ULg)
Full Text
See detailSecondary data value for geostatistical estimation of flow and transport parameters in low-permeability media
Huysmans; Dassargues, Alain ULg

in Stauffer, Fr.; Dassargues, Alain (Eds.) Quantitative Geology from Multiple Sources: S10 Use of multiple sources in conditioning/calibrating groundwater flow and transport models (2006)

This study investigates the relative data value of different types of secondaryinformation to estimate the flow and transport parameters in low-permeability media. Data from four boreholes in two ... [more ▼]

This study investigates the relative data value of different types of secondaryinformation to estimate the flow and transport parameters in low-permeability media. Data from four boreholes in two different clay formations are analyzed. Cross-validation is used to estimate the relevance of the different types of secondary data. The flow and transport parameters (hydraulic conductivity, diffusion coefficient and diffusion accessible porosity) are first estimated by kriging using primary information only and then estimated by co-kriging using primary information and one type of secondary information (grain size, gamma ray and resistivity). The kriging residuals, i.e. the difference between the estimated and the measuredvalues, of the different kriging and co-kriging variants are compared to evaluate the relevance of each type of secondary information. This analysis shows that in the different clays and the different boreholes, different types of secondary information result in the largest improvement of the estimates of the flow and transport parameters. It is not possible to determine the "best" type of secondary information for improving the estimation of the flow and transport parameters of low-permeability media. This probably depends on local factors such as the quality of the loggings and the amount of nearby primary and secondary data. [less ▲]

Detailed reference viewed: 50 (2 ULg)
Full Text
Peer Reviewed
See detailVoice over application-level multicast
Blundell, N.; Egi, N.; Mathy, Laurent ULg

in Performance, Computing, and Communications Conference, 2006. IPCCC 2006. 25th IEEE International (2006)

Detailed reference viewed: 6 (2 ULg)
Full Text
Peer Reviewed
See detailInteractions between numerical and physical modelling for the design and optimization of hydraulic structures - Example of a large hydroelectric complex
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of the International Symposium on Hydraulic Structures, XXII Congreso Latinoamericano de Hidráhulica (2006)

This paper describes the successful combination of both physical and numerical modelling techniques applied to the scale model study of a large hydroelectric complex in India. Thanks to accurate numerical ... [more ▼]

This paper describes the successful combination of both physical and numerical modelling techniques applied to the scale model study of a large hydroelectric complex in India. Thanks to accurate numerical simulations, the physical model layout and the time to studies have been drastically reduced. First, prior to the design of the scale model, a global numerical simulation of the dam reservoir has been carried out, on the basis of the entire set of available topographic data. The simulation results supply the flow conditions in the upstream reservoir, particularly in the vicinity of the dam and the spillway crest. Subsequently, a second numerical computation has been performed to simulate the flow in a scale model representing only a small part of the reservoir upstream of the dam. The suitable correspondence between flow conditions in both cases has been demonstrated. This two-steps approach has enabled a significant reduction in the size of the scale model, and hence, a lower cost as well as a shorter delay for building the model. Simultaneously, it has been possible to decrease the scale factor at constant cost. In conclusion, the present paper provides convincing evidence that the increase in computers performance and the efficiency of contemporary free-surface flow solvers lead to useful numerical information for the optimal design and exploitation of scale models. [less ▲]

Detailed reference viewed: 24 (6 ULg)
Full Text
See detailTopology optimization of electromechanical microsystems against pull-in voltage
Lemaire, Etienne ULg; Duysinx, Pierre ULg; Rochus, Véronique ULg et al

(2006)

The present work is dedicated to the application of topology optimization in the multiphysic field of MEMS. Precisely, it describes how it is possible to maximize pull-in voltage of an electromechanical ... [more ▼]

The present work is dedicated to the application of topology optimization in the multiphysic field of MEMS. Precisely, it describes how it is possible to maximize pull-in voltage of an electromechanical microsystem for which the optimization domain is insulated from the electric field. The electromechanical coupling is modeled by the use of a monolithic analysis. The optimization task is completed with the help of a sequential convex linear approximation schemes (CONLIN). [less ▲]

Detailed reference viewed: 33 (10 ULg)
See detailProtein folding is a rate limiting step for bacterial growth at low temperatures
Piette, Florence; D'Amico, Salvino; Leprince, Pierre ULg et al

Poster (2006)

Detailed reference viewed: 7 (2 ULg)
Full Text
Peer Reviewed
See detailA non-linear 3D beam finite element for the study of steel frames with tapered members
Boissonnade, N.; Degée, Hervé ULg

in Mota Soares, C. A. (Ed.) Proceedings of the 3rd European Conference on Computational Mechanics, Solids, Structures and Coupled Problems in Engineering (2006)

This paper presents the essentials of an original geometrically and materially nonlinear 3-D tapered beam finite element. The theoretical bases of the element are described, with particular attention paid ... [more ▼]

This paper presents the essentials of an original geometrically and materially nonlinear 3-D tapered beam finite element. The theoretical bases of the element are described, with particular attention paid to the choice of an appropriate displacement field and to the corresponding non-linear axial strains. Specific numerical problems met in the development of the finite element are examined, concerning mainly shear and membrane locking and the handling of rigid body motions. Worked examples on isolated members are presented for various types of analyses: elastic linear, elastic critical and geometrically and materially non-linear analyses. Good accuracy with reference to numerical results is shown, as well as good convergence properties. It is also demonstrated – analytically and numerically – that the use of prismatic beam finite elements for the analysis of tapered beams (segmentation technique) may lead to significant discrepancies when the behaviour is influenced by torsional aspects. Then, the behaviour of two different portal frames with tapered members is proposed, and the results obtained using shell elements, tapered beam elements and prismatic beam elements are compared. This comparison shows that the use of tapered elements leads to results in close agreement with those obtained by shell elements, unlike the prismatic ones. The convenience of the tapered beam element is also highlighted since the total number of degrees of freedom required is significantly reduced compared to a shell modelling, leading to easier meshing, shorter computation time and easier interpretation of results. [less ▲]

Detailed reference viewed: 90 (3 ULg)
Peer Reviewed
See detailEffects of the MMP inhibitor GM-6001 on emphysema development, infllammation and MMPs activity induced by cadmium in rats
Fievez, Laurence ULg; Kirschvinck, N.; Belleflamme, N. et al

in Fundamental & Clinical Pharmacology (2006), 20

Detailed reference viewed: 19 (0 ULg)
Full Text
Peer Reviewed
See detailFlexural response of heterogeneous structures using computational homogenisation
Mercatoris, Benoît ULg; Massart, Thierry J.

in 8th International Conference on Computational Structures Technology (CST2006) (2006)

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailEvaluation of systolic function in calves by Doppler echocardiography: preliminary results
Brihoum, M; Rollin, Frédéric ULg; Desmecht, Daniel ULg et al

in Proceedings of the XXIVth World Buiatrics Congress (2006)

Detailed reference viewed: 7 (0 ULg)
See detailEtude préliminaire de l’efficacité des ondes de choc dans le traitement des épicondylites
Forthomme, Bénédicte ULg; Crielaard, Jean-Michel ULg; Croisier, Jean-Louis ULg

in Abstract Book du Symposium « Actualités en électrothérapie » du CKULg (2006)

Detailed reference viewed: 64 (5 ULg)
Full Text
Peer Reviewed
See detailFrom Expository Teaching to First e-Learning Course Production: Capture in a 17 Online Course Sample of a Pedagogical Pattern Facilitating Transition
Verpoorten, Dominique ULg; Poumay, Marianne ULg; Delcomminette, Séverine ULg et al

in Advanced Learning Technologies (2006)

This paper discusses an activity structure, RQAT, mined from a study of 17 on-line courses. It formats this structure as a pedagogical pattern and presents it as an abstraction to support staff ... [more ▼]

This paper discusses an activity structure, RQAT, mined from a study of 17 on-line courses. It formats this structure as a pedagogical pattern and presents it as an abstraction to support staff development, especially faculty willing to incorporate first online components to enhance face to face courses. [less ▲]

Detailed reference viewed: 67 (21 ULg)
Full Text
See detailProgesterone, luteinizing hormone, prolactin and pregnancy-associated glycoproteins during the first trimester pregnancy in cattle.
Ayad, A.; Melo de Sousa, Noelita ULg; Sulon, J. et al

in Proceedings of the 22nd Scientific Meeting of the European Embryo Transfer Association (2006)

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailRegular events in travel behaviour research: setup of a longitudinal websurvey
Cools, Mario ULg; Moons, Elke; Wets, Geert

Conference (2006)

One of the leading paradigms in modern travel behaviour research is the activity based approach, which considers travel as a derivative from the activities that individuals and households need or wish to ... [more ▼]

One of the leading paradigms in modern travel behaviour research is the activity based approach, which considers travel as a derivative from the activities that individuals and households need or wish to perform. Longitudinal designs provide the required framework for a better understanding of the dynamics of travel behaviour. Longitudinal data can be used to analyze behavioural adjustments some time before (response leads) or after (response lags) the occurrence of an event, or for instance to analyze routine behaviour. The questionnaire used to collect the data will be an activity diary. The respondents are asked to fill in all their activities performed that day. The diaries have to be filled in at least twice a week. These moments are randomly selected, but in weeks when a special event occurs, the days around this special event are questioned as well. Performing a longitudinal study has certain drawbacks however. The respondent burden can cause different side-effects, such as panel attrition, decreasing representativeness and, reporting errors. Thus, next to refreshing the sample regularly, trying to keep the respondents motivated is essential. A first step in lowering the respondent burden is to make the activity diaries user-friendly. An internetbased questionnaire makes interaction with respondents possible. The respondent’s current results can be graphically displayed (e.g. geographical map of activity-pattern), potentially awakening or strengthening the interest in the study. Logical rules (e.g. two activities on two different locations require a trip in between) can be formulated, and the interaction with the respondents allows the researcher to get feedback on “strange” answers, or on missing values, thus improving the data quality. This paper describes some potential paths to minimise sample attrition (e.g. internet-based interaction with respondents) and ways to refresh the sample. These findings are applied to the study of travel behaviour of Flemish households around school holidays. [less ▲]

Detailed reference viewed: 23 (0 ULg)
Full Text
Peer Reviewed
See detailMéthodologie transdisciplinaire de gestion de corpus pour les disciplines de l'interaction : recherche de principes directeurs
Atifi, Hassan; Lejeune, Christophe ULg; Ninova, Goritsa et al

in Duteil-Mougel, Carine; Foulquié, Baptiste; Rastier, François (Eds.) et al Corpus en lettres et sciences sociales : des documents numériques à l'interprétation (2006)

Detailed reference viewed: 179 (9 ULg)
Full Text
See detailCoupled modelling of an excavation in a brittle formation
Collin, Frédéric ULg; Li, Xian Ling; Chambon, René et al

Conference (2006)

This paper is concerned with the coupling effects existing between the mechanical problem and the water diffusion process during an excavation, in relation with the nuclear waste disposal concepts. The ... [more ▼]

This paper is concerned with the coupling effects existing between the mechanical problem and the water diffusion process during an excavation, in relation with the nuclear waste disposal concepts. The hydromechanical coupling effects are first evidenced. Then, the permeability variation with damage is studied. Finally, different kind of flow boundary condition are considered. Their influence on the cavity convergence is highlighted and their effect on strain localisation process as well. [less ▲]

Detailed reference viewed: 16 (1 ULg)
Peer Reviewed
See detailSummer habitat suitabily of three teuthophageous odontocetes in the Northwestern Mediterranean Sea
Praca, Emilie; Gannier, Alexandre; Das, Krishna ULg

Conference (2006)

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailMéthode d'analyse du mouvement de l'épaule par utilisation de nappes
Schwartz, Cédric ULg; Lempereur, Mathieu; Burdin, Valérie et al

Poster (2006)

Nous proposons une méthode permettant d’étudier le mouvement des structures osseuses du complexe de l'épaule (humérus, omoplate, clavicule). Cette méthode est basée sur le suivi de nappes de marqueurs ... [more ▼]

Nous proposons une méthode permettant d’étudier le mouvement des structures osseuses du complexe de l'épaule (humérus, omoplate, clavicule). Cette méthode est basée sur le suivi de nappes de marqueurs plutôt qu'un ensemble de marqueurs individuels à l'aide d'un système de caméras VICON. Le suivi du mouvement des nappes par un algorithme de recalage robuste doit permettre de s'affranchir du mouvement de la peau et avoir accès aux mouvements des structures osseuses sous-jacentes. Cette méthode est comparée à une méthode standard de la littérature. Les résultats montrent que le mouvement de l’omoplate est sous estimé ou sur estimé suivant les axes de rotation. [less ▲]

Detailed reference viewed: 45 (3 ULg)
See detailEvolution d'une narcolepsie chez une patiente acromégale ayant subi une radiothérapie
Burlacu, M. C.; Valdes Socin, Hernan Gonzalo ULg; Poirrier, R. et al

in 23ème Congrès de la Société Française d'Endocrinologie - Abstract book (2006)

Detailed reference viewed: 28 (2 ULg)
See detailApplication of magnetic susceptibility on different carbonate platform type
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg; Mabille, Cédric ULg

in Abstract book 17th ISC - Fukuoka, Japan - 2006 (2006)

Detailed reference viewed: 8 (3 ULg)
Peer Reviewed
See detailQTL fine-mapping: experience in French dairy cattle
Gautier, M.; Druet, Tom ULg; Fritz, S. et al

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailRelating Cross Gramians and Sensitivity Analysis in Systems Biology
Streif, S.; Findeisen, R.; Bullinger, Eric ULg

in Proceedings of the 17th International Symposium on Mathematical Theory of Networks and Systems (MTNS 2006) (2006)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailL’injustice de la responsabilisation
Andre, Géraldine ULg

Conference (2006)

Detailed reference viewed: 5 (2 ULg)
See detailPlasminogen activator inhibitor type 1 (PAI-1) controls bone marrow-dependent and independent vascularization
Jost, M; Maillard, C; Lecomte, J et al

Poster (2006)

Detailed reference viewed: 16 (4 ULg)
Full Text
Peer Reviewed
See detailThermal characterisation of urban fabrics using GIS and Townscope modelling tool
Cardenas-Jirón; Azar, S.; Teller, Jacques ULg

in Proc. of 4th European Conference on Energy Performance & Indoor Climate in Buildings (EPIC) (2006)

Detailed reference viewed: 51 (7 ULg)
Peer Reviewed
See detailRole of tumor-associated lipogenesis in the formation and composition of membrane microdomains
Timmermans, L.; Kischel, Philippe; Beckers, Albert ULg et al

Conference (2006)

Detailed reference viewed: 15 (5 ULg)
Peer Reviewed
See detailValidation of micro-CT: experimental protocol for titanium bone scaffolds
Kerckhofs, Greet ULg; Wevers, Martine; Lomov, Stepan Vladimirovitch et al

Conference (2006)

Detailed reference viewed: 8 (2 ULg)
See detailEtude épidémiologique du viroïde de la mosaïque latente du pêcher en Tunisie
Fekih Hassen, I.; Massart, Sébastien ULg; Roussel, S. et al

Poster (2006)

Detailed reference viewed: 21 (1 ULg)
Peer Reviewed
See detailMédias dominants et altermondialisme. De l’ouverture à la censure
Geuens, Geoffrey ULg

in Durand, Pascal; Hébert, Pierre; Mollier, Jean-Yves (Eds.) et al La censure de l’imprimé. Belgique, France, Québec et Suisse romande (XIXe et XXe siècles) - Actes du colloque international Censure et Imprimé (Université de Versailles, Saint-Quentin-en-Yvelines, 21-23 mai 2002) (2006)

Les débats médiatiques sur la mondialisation s’articulent autour de deux thèses apparemment antagonistes. Pour les partisans du libéralisme économique et les représentants des milieux d’affaires, il ... [more ▼]

Les débats médiatiques sur la mondialisation s’articulent autour de deux thèses apparemment antagonistes. Pour les partisans du libéralisme économique et les représentants des milieux d’affaires, il s’agit de condamner l’interventionnisme et le dirigisme politique dans le libre-jeu de l’économie de marché. Les chefs de file syndicaux et dirigeants réformistes de l’« altermondialisme », entendent, quant à eux, défendre, bec et ongles, l’idée d’un personnel politique victime de la bourse et des pressions de divers lobbies industriels et financiers. Dans les deux cas pourtant, on procède à une dissociation artificielle et trompeuse de l’économique et du politique. Cette représentation dominante de la mondialisation est à l’origine d’une censure, celle qui, derrière le paravent de l’Etat « victime » ou « bourreau » des marchés, refuse la parole aux critiques dénonçant les liens organiques entre pouvoirs économique, politique et médiatique. [less ▲]

Detailed reference viewed: 70 (11 ULg)
Full Text
Peer Reviewed
See detailAnalyse qualitative de la problématique de l’abandon de la natation de compétition en Communauté française de Belgique
Lefefvre, Fabien; Habsch, Ingrid; Cloes, Marc ULg

in Carlier, Ghislain; Bouthier, Daniel; Bui-Xuän, G. (Eds.) Intervenir en éducation physique et en sport. Recherches actuelles (2006)

Dans cette étude, nous aborderons le phénomène de l’abandon de la pratique compétitive de la natation en privilégiant une approche qualitative, contrairement à ce qui a déjà été proposé dans la ... [more ▼]

Dans cette étude, nous aborderons le phénomène de l’abandon de la pratique compétitive de la natation en privilégiant une approche qualitative, contrairement à ce qui a déjà été proposé dans la littérature. En récoltant des données chez les différents acteurs de clubs, nous ambitionnons de mieux cerner le phénomène et, surtout, de croiser les données issues des pratiquants avec celles des autres personnages clés de la réussite sportive. Mettre en exergue les solutions imaginées par les dirigeants sportifs pour lutter contre ce phénomène et offrir une base de réflexion et d’action aux praticiens constituent les finalités pratiques de cette étude. [less ▲]

Detailed reference viewed: 116 (9 ULg)
Full Text
See detailThe ability of five radioimmunoassay systems to detect early pregnancy-associated glycoprotein in bovine plasma.
Ayad, A.; Melo de Sousa, Noelita ULg; Sulon, J. et al

in Proceedings of the 22nd Scientific Meeting of the European Embryo Transfer Association (2006)

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailSimple heuristic model of an aerosol filter
Lecocq, Rapahaël; Calvo, Sébastien ULg; Saroha, Anil et al

Poster (2006)

Detailed reference viewed: 5 (1 ULg)
Full Text
Peer Reviewed
See detailPerturbations endocriniennes et polluants environnementaux
Charlier, Corinne ULg

in Revue Médicale de Liège (2006)

Detailed reference viewed: 25 (3 ULg)
Full Text
Peer Reviewed
See detailA scale transition procedure for flexural effects
Mercatoris, Benoît ULg; Massart, Thierry J.

in 7th National Congress on Theoretical and Applied Mechanics (NCTAM2006) (2006)

Detailed reference viewed: 6 (1 ULg)
Peer Reviewed
See detailMagnetic resonance imaging of canine elbow joint
Saunders; Snaps, Frédéric ULg

Conference (2006)

Detailed reference viewed: 6 (1 ULg)
Full Text
Peer Reviewed
See detailSuction and time effects on the behaviour of a reservoir chalk
Priol, Grégoire; De Gennaro, Vincenzo; Delage, Pierre et al

in Van Cotthem, Alain; Charlier, Robert; Thimus, Jean-François (Eds.) EUROCK 2006 - Multiphysics Coupling and Long Term Behaviour in Rock Mechanics (2006)

Oil reservoir rocks contain various immiscible fluids (oil, water and gas) and they are submitted to elevated temperatures in the oilfield. Hence, they exhibit a typical coupled behaviour where ... [more ▼]

Oil reservoir rocks contain various immiscible fluids (oil, water and gas) and they are submitted to elevated temperatures in the oilfield. Hence, they exhibit a typical coupled behaviour where multiphysics and coupled Thermo-Hydro-Mechanical aspects are predominant. This paper presents some results from researches carried out within the PASACHALK 2 European funded collaborative research. In this research dedicated to subsidence problems in the North sea Ekofisk oilfield, the behaviour of a reservoir chalk containing two immiscible fluids (an organic non polar fluid and water) is considered within the framework of the mechanics of unsaturated soils (no temperature effects considered). In order to account for the mechanical coupled effects related to the two pore fluids, the oil-water suction was considered as an independent stress variable. The paper presents some experimental results describing the combined effect of suction and time on the isotropic compression behaviour of the chalk. A viscoelastoplastic constitutive model based on one hand on the Barcelona BBM elastoplastic model for unsaturated and on the other hand on Perzina’s approach of viscous behaviour of soils is also presented and validated against experimental evidence. [less ▲]

Detailed reference viewed: 87 (2 ULg)
Full Text
Peer Reviewed
See detailDifférents traitements de la graine de lin dans le cadre de l'engraissement de vaches de réforme.
Cabaraux, Jean-François ULg; Dotreppe, Olivier ULg; Dufrasne, Isabelle ULg et al

in 13ième Rencontres autour des Recherches sur les Ruminants (2006)

Detailed reference viewed: 21 (0 ULg)
See detailLa sélection des antagonistes de Penicillium expansum et Botrytis cinerea, deux parasites de post-récolte des pommes
Achbani, E. H.; Mounir, R.; El Jaafari, S. et al

Poster (2006)

Detailed reference viewed: 30 (0 ULg)
Peer Reviewed
See detailLe climat du Québec : un passé pour quel avenir ?
Boreux, Jean-Jacques ULg; Bernier, J.; Perreault, L.

Conference (2006)

Detailed reference viewed: 26 (6 ULg)