References of "Scientific congresses and symposiums"
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See detailIdentification of a family harboring a novel LHBéta subunit mutation associated with hypogonadism
Daly, Adrian ULg; Salvi, R.; Ménagé, J.-J. et al

in The Endocrine Society's - 88th Annual Meeting - Abstract book (2006, June)

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See detailBetaDat: A beta Cephei database
Thoul, Anne ULg

Conference (2006, June)

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See detailImpact of laser-assisted hatching on pregnancy rate in fresh and frozen-thawed cycles
Thonon, Fabienne ULg; Gaspard, Olivier ULg; Jouan, Caroline ULg et al

in Human Reproduction (2006, June), 21(Suppl. 1), 124

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See detailAgricultural tools guidance assistance by using machine vision
Leemans, Vincent ULg; Destain, Marie-France ULg

in Proceedings of the NCTAM 2006 7th National Congress on Theoretical and Applied Mechanics (2006, May 30)

This paper presents a regulation mechanism aiming to position agricultural tools relatively to the previous lines, while sowing or harvesting. The sowing rows were revealed by a background correction, the ... [more ▼]

This paper presents a regulation mechanism aiming to position agricultural tools relatively to the previous lines, while sowing or harvesting. The sowing rows were revealed by a background correction, the background being obtained thanks to a median rank filter. The method was found efficient in eliminating the shadows. For the crop rows (chicory rows), a neural network was used to localise the plants. While the petiole and the leaves were easily separated from the soil, the chicory root and the soil having about the same colour and the lighting condition varying widely, it was more difficult to obtain a good contrast between those parts, which leaves place for some improvements. The adapted Hough transform consisted in computing one transform for each line in the cluster with, for reference, the position and direction of the theoretical position of the row. The different transforms were then added. The position was used in a feedback regulation loop. An articulated mechanism was used to ensure the lateral displacement of the tool relatively to the tractor. The behaviour of the whole outfit was studied during several field tests. The standard deviation of the error, measured as the difference between the observed inter-row distance and its theoretica value, was of 23 mm for sowing and 31 mm for harvesting and its amplitude was less than 100 mm for sowing and less than 115 mm during the harvest, which was sufficient to fulfil the requirements of the application. Sources of systematic errors were also identified as linked to the geometric considerations. Their correction requires an accurate mounting of the camera, which may be possible for a serial montage. [less ▲]

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See detailCharges du mariage et autonomie de la volonté en régime de séparation de biens
Leleu, Yves-Henri ULg

in Conseil francophone de la fédération royale du notariat belge (Ed.) Actualités des contrats de mariage et des contrats de vie commune (2006, May 30)

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See detailModernité médiatique et dialogue culturel
Durand, Pascal ULg

Conference (2006, May 25)

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See detailQuelques années après la réforme des polices: un regard sur la formation
Fincoeur, Bertrand ULg

Conference (2006, May 23)

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See detailMaternal cardiopulmonary resuscitation
Brichant, Jean-François ULg

Conference (2006, May 20)

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See detailEnglish language immersion in french-speaking children : does learning to read have an impact on the subsequent acquisition of french orthographic code ?
Nicolay, Anne-Catherine ULg; Fantauzzi, A.; Sadzot, Agnès ULg et al

Poster (2006, May 19)

Apprendre à lire dans une langue n’interfère pas avec l’apprentissage de la lecture dans une autre langue mais prépare plutôt le terrain pour apprendre à lire dans une autre langue. Comme dans le langage ... [more ▼]

Apprendre à lire dans une langue n’interfère pas avec l’apprentissage de la lecture dans une autre langue mais prépare plutôt le terrain pour apprendre à lire dans une autre langue. Comme dans le langage oral, il peut y avoir quelques « mixing » de prononciation au niveau des mots qui disparaissent progressivement au fur et à mesure que les langues se compartimentalisent. Avec le temps, l’enfant apprendra également que des mots qui s’écrivent de la même manière dans les deux langues peuvent se prononcer de manière différente. Une recherche menée sur des enfants francophones Belges suivant un programme d’immersion scolaire en anglais et ayant appris à lire en anglais confirment ces observations. 150 enfants âgés de 7 à 12 ans fréquentant ce programme ont été testés sur leurs compétences en lecture du français (décodage et compréhension). Leurs performances (type et nombre d’erreurs, vitesse de lecture) ont été comparées à celles d’enfants francophones fréquentant un enseignement unilingue. Leurs habiletés métaphonologiques (manipulation de la rime et du phonème) ont également été testées. [less ▲]

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See detailLa censure invisible
Durand, Pascal ULg

Conference (2006, May 19)

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See detailThe role of selective rehearsal and attentional inhibition in directed forgetting
Feyers, Dorothée ULg; Hogge, Michaël; Collette, Fabienne ULg

Poster (2006, May 19)

The directed forgetting paradigm has been extensively used to assess how subjects intentionally limit the future expression of specific memory content. In the item method, subjects are given a list of ... [more ▼]

The directed forgetting paradigm has been extensively used to assess how subjects intentionally limit the future expression of specific memory content. In the item method, subjects are given a list of words with the instruction to remember every item followed by a “remember” cue (to-be-remembered items or TBR) and to forget items followed by a “forget” cue (to-be-forgotten items or TBF). Typically, TBR items are better recalled or recognized than TBF items when subjects are subsequently tested on all presented words, regardless of study instructions. However, it is currently not clear if this directed forgetting effect is due to a selective rehearsal of TBR items or to an attentional inhibition of TBF items. In the present study, the performance of two groups of subjects that performed a directed forgetting task with or without articulatory suppression was compared. Indeed, if selective rehearsal is responsible of the directed forgetting effect, the effect should disappear when subjects are not allowed to rehearse TBR items because of the articulatory suppression instruction. Results showed an equivalent directed forgetting effect between the two groups on a recognition task. These results suggest that selective rehearsal is not the major determinant of the directed forgetting effect. [less ▲]

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See detailK-excess, an unexploited method for discovering red quasars
Nakos, T.; Willis, J.; Andreon, S. et al

Conference (2006, May 19)

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See detailEfficient controlled radical polymerization of vinyl acetate based on cobast complexes
Debuigne, Antoine ULg; Detrembleur, Christophe ULg; Bryaskova, Rayna et al

Conference (2006, May 18)

Detailed reference viewed: 13 (1 ULg)
See detailA generic platform for SPM-based molecular recognition processes and stiluli-responsive probes
Gabriel, Sabine ULg; Jérôme, Christine ULg; Silva-Goncalves, Elsa et al

Poster (2006, May 18)

Detailed reference viewed: 22 (1 ULg)
See detailDesign of stealth nanoparticles for drug delivery based on new amphiphilic copolymers
Rieger, Jutta ULg; Passirani, Catherine; Dubois, Philippe et al

Conference (2006, May 18)

Detailed reference viewed: 36 (1 ULg)
See detailStructure and morphology of thin films of fulorinated copolymers
Awada, H.; Lenoir, Sandrine; Jérôme, Christine ULg et al

Poster (2006, May 18)

Detailed reference viewed: 26 (0 ULg)
See detailElectrografting of thermo-responsive polymer film on conductive substrate
Gabriel, Sabine ULg; Stach, M.; Zhang, T. et al

Poster (2006, May 18)

Detailed reference viewed: 31 (1 ULg)
See detailSynthesis of novel amphiphilic and pH-sensitive ABC miktoarm star copolymers
Van Butsele, Kathy; Stoffelbach, François; Jérôme, Robert ULg et al

Poster (2006, May 18)

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See detailThe use of an apoE–deficient (apoE-/-) mice model to characterize the therapeutic benefits of original thromboxane modulators
Cherdon, Céline ULg; Rolin, stephanie; Hanson, Julien ULg et al

Poster (2006, May 17)

The aim of our study was to use an apoE–deficient mouse model to test drugs acting as thromboxane A2 antagonist. Presented here is the “en face” method 6 which allows the evaluation of atherosclerosis ... [more ▼]

The aim of our study was to use an apoE–deficient mouse model to test drugs acting as thromboxane A2 antagonist. Presented here is the “en face” method 6 which allows the evaluation of atherosclerosis lesions development in wild type and APO E-/- mice. This method involves pinning out the aorta and quantifying lesion area as a percentage of total surface area. The use of this mice model offers a unique opportunity to characterize the therapeutic benefits of pharmacologicals agents designed in our laboratory of which antioxidants and thromboxane modulators. The pharmacological characterization of BM-573 as potential antiatherosclerotic agent will also be discussed [less ▲]

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See detailProduction and characterization of monoclonal and polyclonal antibodies against Scd14
Halleux, Caroline; Boudry, Christelle ULg; Thewis, André ULg et al

Poster (2006, May 17)

Detailed reference viewed: 23 (4 ULg)
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See detailPreDetector : Prokaryotic Regulatory Element Detector
Hiard, Samuel ULg; Rigali, Sébastien ULg; Colson, Séverine ULg et al

Poster (2006, May 17)

PreDetector is a stand-alone software, written in java. Its final aim is to predict regulatory sites for prokaryotic species. It comprises two functionalities. The first one is very similar to Target ... [more ▼]

PreDetector is a stand-alone software, written in java. Its final aim is to predict regulatory sites for prokaryotic species. It comprises two functionalities. The first one is very similar to Target Explorer1. From a set of sequences identified as potential target sites, PreDetector creates a consensus sequence and computes its scoring matrix. This sequence and matrix can be saved on a file and, then, be used to find along a selected genome the sequences that are close enough to the consensus sequence. To this end, a score is attributed to each locus in the genome according to the similarity measure defined by the matrix. The output of this functionality is filtered with a cut-off score and then directly used as input by the second one. The second functionality starts by fetching the gene positions of the selected species from the NCBI server. The loci having above cut-off score are then classified into four classes, allowing multiple classes for one element. This gives the biologists a better view of his discovered sequences. [less ▲]

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See detailInventory control in a decentralized two-stage make-to-stock queuing system
Arda, Yasemin ULg; HENNET, Jean-Claude

in INCOM 06, 12th IFAC Symposium on Information Control Problems in Manufacturing, Saint-Etienne, France, 17-19 May 2006 (2006, May 17)

In an Enterprise network, several companies interact to produce families of goods. Each member company seeks to optimize his own production and inventory policy to maximize his profit. These objectives ... [more ▼]

In an Enterprise network, several companies interact to produce families of goods. Each member company seeks to optimize his own production and inventory policy to maximize his profit. These objectives are generally antagonistic and can lead to contradictory choices in the context of a network with a high degree of local decisional autonomy. To avoid a global loss of economic efficiency, the network should be equipped with a coordination mechanism. The present paper describes a coordination contract negotiated between a manufacturer and a supplier. The purpose of the negotiation is to determine the price of the supplied intermediate goods and the delay penalty in case of a late delivery. For a manufacturer with a dominant contracting position, the outcome of the negotiation can be computed as a Stackelberg equilibrium point. Under the resulting contract, the two-stage supply chain reaches globally optimal running conditions with the maximal possible profit obtained by the manufacturer and the smallest acceptable profit obtained by the supplier. [less ▲]

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See detailThéologie et politique dans le Léviathan de Hobbes
Herla, Anne ULg

Conference (2006, May 17)

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See detailLes manuels scolaires d'histoire, obstacles à la compréhension "historienne" ?
Jadoulle, Jean-Louis ULg; Bouhon, Mathieu

Conference (2006, May 17)

Detailed reference viewed: 9 (1 ULg)
See detailFreeze-drying of lactic acid bacteria as starter cultures for gari production.
Yao, A. A.; Dortu, C.; Holzapfel, W. et al

Poster (2006, May 17)

Detailed reference viewed: 14 (1 ULg)
See detailAccompagner pour une qualité d'accueil en question
Pirard, Florence ULg

Conference (2006, May 17)

Detailed reference viewed: 8 (0 ULg)
See detailSynthesis of anhydro-muramic acid derivatives as substrates for MurNAc amidase
Mercier, Frédéric; Lemaire, Christian ULg; Plenevaux, Alain ULg et al

Poster (2006, May 17)

Detailed reference viewed: 9 (0 ULg)
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See detailUsing the HUBER® technique for the rehabilitation of patients with multiple sclerosis
Maertens de Noordhout, Benoît; Houlmont, F.; Léonard, Yves et al

Conference (2006, May 10)

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See detailCaracterización de cepas de Escherichia coli productoras de toxina Shiga aisladas de bovinos: presencia de marcadores de virulencia atípicos
Larzábal, M.; Vilte, D.; Rodriguez, Sabrina ULg et al

Poster (2006, May 10)

CARACTERIZACIÓN DE CEPAS DE Escherichia coli PRODUCTORAS DE TOXINA SHIGA AISLADAS DE BOVINOS: PRESENCIA DE MARCADORES DE VIRULENCIA ATÍPICOS. Larzábal M. (1); Vilte D.A. (1); Rodríguez S. (1); Elizondo A ... [more ▼]

CARACTERIZACIÓN DE CEPAS DE Escherichia coli PRODUCTORAS DE TOXINA SHIGA AISLADAS DE BOVINOS: PRESENCIA DE MARCADORES DE VIRULENCIA ATÍPICOS. Larzábal M. (1); Vilte D.A. (1); Rodríguez S. (1); Elizondo A.M. (1); Irino K. (2); Mercado E.C. (1) (1) Instituto de Patobiología, CICVyA, CNIA, Instituto Nacional de Tecnología Agropecuaria (INTA). CC25 (1712), Castelar, Prov. Buenos Aires, Argentina. (2) Departamento de Microbiología, Sección Enterobacterias, Instituto Adolfo Lutz, SP, Brasil. emercado@cicv.inta.gov.ar Palabras Clave: STEC, bovinos, marcadores virulencia. Introducción: Escherichia coli productor de toxina Shiga (STEC) produce enfermedad severa en el hombre, cuyo espectro clínico incluye diarrea, colitis hemorrágica (CH) y síndrome urémico hemolítico (SUH), la principal causa de falla renal aguda en niños. STEC es considerado un agente zoonótico, siendo el ganado bovino el principal reservorio de infección para el hombre. Factores de virulencia adicionales, como la producción de intimina (eae) y enterohemolisina (ehxA) se encuentran presentes en los serotipos de STEC denominados enterohemorrágicos (EHEC). Objetivo: caracterizar los marcadores de virulencia propios de EHEC e investigar la presencia de factores de virulencia putativos en cepas STEC. Materiales y Métodos: 35 cepas STEC aisladas de heces de terneros diarreicos (n=27) o sanos (n=3) y de carne bovina (n=5). Los subtipos de Stx2 (stx2) e intimina (eae) fueron determinados mediante PCR-RFLP. Genes codificantes de toxinas (ehxA, cdt-III, cdt-IV, cnf1, cnf2 y astA), adhesinas (afaE8, f17A, sfa, pap y clpG) y aerobactina (iucD) fueron detectados mediante PCR. La identificación de los antígenos O y H se llevó a cabo mediante métodos standard. Resultados: la mayoría de las cepas (n=27) perteneció a seropatotipos asociados con frecuencia a CH y SUH. Los serotipos O157 (n=6), O5:H- (n=5), O26:H- (n=1),O26:H11 (n=6), O111:H- (n=8) y O145:H- (n=1), los subtipos de toxina Stx2 (n=11), Stx2vh-b (n=2) y Stx2vh-a (n=1), y los genes eae (n=32) y ehxA (n=35) identificados, son marcadores de virulencia de cepas altamente patógenas para el hombre. Algunas de estas cepas presentaron marcadores de virulencia propios de E. coli diarragénicos (astA) o productores de infecciones extraintestinales (ExPEC) (cdt-III, iucD, f17A, pap). Marcadores característicos de cepas de origen bovino (cnf2, afaE8) se detectaron en serotipos poco frecuentes en humanos. Conclusiones: el ganado bovino es reservorio de cepas EHEC altamente virulentas. La función en cepas EHEC de factores de virulencia característicos de cepas ExPEC debe ser investigada. Algunos de los genes detectados podrían ser parte de islas de patogenicidad parcialmente deleteadas presentes en el cromosoma de cepas EHEC o pertenecer a elementos genéticos móviles recientemente adquiridos. [less ▲]

Detailed reference viewed: 37 (6 ULg)
See detailLe mouvement des paysans sans terre au Brésil
Schoonbroodt, Bénédicte ULg

Conference (2006, May 08)

Detailed reference viewed: 18 (8 ULg)
See detailCoût des infrastructures et durabilité en milieu périurbain
Halleux, Jean-Marie ULg

Conference (2006, May 05)

Detailed reference viewed: 8 (1 ULg)
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See detailLe larynx cicatriciel: rééducation logopédique
Morsomme, Dominique ULg; Ingrid, Verduyckt

Conference (2006, May 05)

Detailed reference viewed: 16 (2 ULg)
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See detailLa construction de la norme d’employabilité
Orianne, Jean-François ULg

Conference (2006, May 05)

Detailed reference viewed: 38 (7 ULg)
Peer Reviewed
See detailPhysiological role of the putative ammonium transporter RhCG in the mouse
Biver, Sophie ULg; Scohy, Sophie; Szpirer, Josiane et al

Conference (2006, May 05)

Detailed reference viewed: 22 (1 ULg)
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See detailConvergent Numerical Solution of Wave Scattering Problems at High Frequencies
Geuzaine, Christophe ULg

in Kotiuga, R. (Ed.) Proceedings of the 2nd Advanced Computational Electromagnetics workshop (2006, May 05)

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See detailVZV IgG and VZV IgM determination: a comparison study.
HUYNEN, Pascale ULg

Conference (2006, May 04)

Detailed reference viewed: 7 (1 ULg)
See detailProblèmes cardiovasculaires : actualisation des connaissances
Krzesinski, Jean-Marie ULg

Conference (2006, May 04)

Detailed reference viewed: 3 (2 ULg)
See detailL'accès du pharmacien à la spécialisation en biologie clinique
Chapelle, Jean-Paul ULg

Conference (2006, May 03)

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See detailRésultats expérimentaux d'une méthode (CAMEL) d'entraînement et d'évaluation des étudiants de première année universitaire
Leclercq, Dieudonné ULg; Herremans, Thomas ULg; Englebert, L. et al

in Actes du 23e colloque international de l'association internationale de prédagogie universitaire (AIPU) (2006, May)

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See detailEsquivanne: Un Outil de Conception des Barrages Mobiles de Navigation
Rigo, Philippe ULg; Lizin, S.; Closset, M. P. et al

in PIANC 2006, 31ème Congrès de l’PIANC (Article 076) (2006, May)

Detailed reference viewed: 57 (1 ULg)
See detailSynthèse de revêtement de nano-objets par électroréduction
Jérôme, Christine ULg

Poster (2006, May)

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Peer Reviewed
See detailNeighbour-Based Overlay Topology Control in Ad Hoc Networks
Calomme, Sandrine; Leduc, Guy ULg

Poster (2006, May)

Detailed reference viewed: 19 (4 ULg)
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See detailScantling Optimization of Double-Hull Structures to Minimize their Production Cost
Richir, Thomas; Karr, D.; Rigo, Philippe ULg

in IMDC 2006, Ann Arbor, Michigan, USA, May 2006 (2006, May)

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See detailA Way to Deal with Model-Plant Mismatch for a Reliable Diagnosis in Transient Operation
Borguet, Sébastien ULg; Dewallef, Pierre ULg; Léonard, Olivier ULg

in Proceedings of the ASME Turbo Expo 2006 (2006, May)

Least-squares health parameter identification techniques such as the Kalman filter have been massively used to solve the problem of turbine engine diagnosis. Indeed, such methods give a good estimate ... [more ▼]

Least-squares health parameter identification techniques such as the Kalman filter have been massively used to solve the problem of turbine engine diagnosis. Indeed, such methods give a good estimate provided that the discrepancies between the model prediction and the measurements are zero-mean, white random variables. In turbine engine diagnosis, however, this assumption does not always hold due to the presence of biases in the model. This is especially true for transient operation. As a result, the estimated parameters tend to diverge from their actual values which strongly deteriorates the diagnosis. The purpose of this contribution is to present a Kalman filter diagnosis tool where the model biases are treated as an additional random measurement error. The new methodology is tested on simulated transient data representative of a current turbofan layout. While relatively simple to implement, the newly developed diagnosis tool exhibits a much better accuracy than the original Kalman filter in the presence of model biases. [less ▲]

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See detailDesign of Movable Weirs and Storm Surge Barriers
Rigo, Philippe ULg; Abdelnour, R.; Bulckaen, D. et al

in PIANC 2006, 31ème Congrès de l’PIANC (Article 031) (2006, May)

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See detailAn Analytical Cost Assessment Module for the Detailed Design Stage
Caprace, Jean-David ULg; Rigo, Philippe ULg; Warnotte, Renaud ULg et al

in Conference on Computer Applications and Information Technology in the Maritime Industries (COMPIT) (2006, May)

The main goal of the project is to implement a “real time” and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented ... [more ▼]

The main goal of the project is to implement a “real time” and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost assessment module reaches the validation stage at the Alstom Marine St Nazaire shipyard (Chantiers de l’Atlantique) within the framework of the European project InterSHIP which has partly financed the study. In the future, cost assessment will become increasing important. It is proposed to assist/help the designers by a “real time” follow-up of the cost, starting at the earliest conceptual design stage up to the latest detailed design stage. The development such a cost assessment tool requires considering simultaneously the design criteria and the production parameters. Designers will consequently be able to choose the least expensive options at each step of the design procedure (earlier is of course better). [less ▲]

Detailed reference viewed: 143 (25 ULg)
See detailStrontium ranelate reduces the risk of vertebral fracture in patients with osteopenia
Seeman, E.; Sawicki, A.; Reginster, Jean-Yves ULg et al

in Osteoporosis International (2006, May), 17(Suppl. 2), 209

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See detailEmergency graft removal after liver transplantation
Detry, Olivier ULg; De Roover, Arnaud ULg; Delwaide, Jean ULg et al

in Liver Transplantation (2006, May), 12(5), 72

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See detailOn the accuracy of analytical models of TCP throughput
El Khayat, Ibtissam; Geurts, Pierre ULg; Leduc, Guy ULg

in Lecture Notes in Computer Science (2006, May), 3976

Based on a large set of TCP sessions we first study the accuracy of two well-known analytical models (SQRT and PFTK) of the TCP average rate. This study shows that these models are far from being accurate ... [more ▼]

Based on a large set of TCP sessions we first study the accuracy of two well-known analytical models (SQRT and PFTK) of the TCP average rate. This study shows that these models are far from being accurate on average. Actually, our simulations show that 70% of their predictions exceed the boundaries of TCP-Friendliness, thus questioning their use in the design of new TCP-Friendly transport protocols. Our study also shows that the inaccuracy of the PFTK model is largely due to its inability to make the distinction between the two packet loss detection methods used by TCP: triple duplicate acknowledgments or timeout expirations. We then use supervised learning techniques to infer models of the TCP rate. These models show important accuracy improvements when they take into account the two types of losses. This suggests that analytical model of TCP throughput should certainly benefit from the incorporation of the timeout loss rate. [less ▲]

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See detailNon-confined jet-slot-cavity oscillator: flow-acoustic interaction modeling
Glesser, Martin; Billon, Alexis ULg; Valeau, Vincent et al

Conference (2006, May)

Disturbing whistling due to self-sustained oscillations can be produced in a wide variety of geometries where a sheared subsonic flow impinges on a downstream obstacle. When those self-sustained ... [more ▼]

Disturbing whistling due to self-sustained oscillations can be produced in a wide variety of geometries where a sheared subsonic flow impinges on a downstream obstacle. When those self-sustained oscillations are coupled with an acoustic resonator, the acoustic production can reach dramatically high levels. The configuration known as jet-slot oscillator is studied in the particular case where the resonator is the flow-supply duct and the source region is unconfined. This sound production is due to flow-acoustic interactions and can be modeled by using the vortex-sound theory. It allows one to express the acoustic power generated by the interaction between the acoustic, velocity, and vorticity fields. They are obtained separately by using rather simple models together with experimental input data. The vorticity field is modeled with the assumption that the shear layer is rectilinear and the vorticity is only concentrated on discrete vortex-points convected at constant velocity. The vorticity being non null only in the shear layer, the velocity field is calculated only in this region where it is equal to the vortices convection speed. The source region dimensions being small compared to the acoustic wavelength, this field is considered, in harmonic regime, as a sinusoidal temporal fluctuation of a potential field. This field can be taken as resulting from the flow produced by the radiation of the flow supply duct's acoustic resonance. It is obtained by solving the Poisson equation in a simplified geometry obtained by Schwarz-Christoffel mapping. The configuration studied here presents some specific problems which must be addressed to correctly model its sound production. Experimentations are used to specify the missing parameters. The major one is the synchronisation between the vorticity field and the acoustic field which governs the way that the vortices interact with the resonant acoustic field. At last, comparison between experimental data and modeling results permits to validate the study, in terms of emitted frequency. Further developments of the model will allow to predict the emitted sound level. [less ▲]

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See detailLe Règlement 44/2001 : 10 propositions de réforme
Wautelet, Patrick ULg

Conference (2006, May)

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See detailThe generalized-alpha time-integration scheme for mechatronic systems with elastic components
Bruls, Olivier ULg

Conference (2006, May)

This talk concerns the numerical simulation of mechatronic systems, such as robots, machine-tools or modern vehicles. In general, a mechatronic system is composed of various technological components: a ... [more ▼]

This talk concerns the numerical simulation of mechatronic systems, such as robots, machine-tools or modern vehicles. In general, a mechatronic system is composed of various technological components: a mechanism, actuators, sensors, and control units. For critical applications, it is also necessary to account for elastic deformations in the mechanism. The generalized-alpha method has been initially developed for the dynamic simulation of flexible mechanical structures, which are represented by lightly damped second-order ODEs. Usually, those equations are obtained after a finite element spatial discretization, with the consequence that they are affected by a large number of high-frequency modes with a purely numerical origin. The generalized-alpha method has very interesting properties in this context, such as an adjustable amount of high-frequency numerical dissipation, A-stability, second-order accuracy, and a high level of computational efficiency. A mechanism with elastic components can be described using the nonlinear finite element formalism. Due to the presence of kinematic constraints, the equations of motion are second-order DAEs, and we shall consider the generalized-alpha method for the direct simulation of the index-3 problem. In particular, some results about the convergence and the stability of the algorithm will be discussed. Finally, a mechatronic system involves mechanical and non-mechanical components, and it is thus modelled as a mixed set of second- and first-order DAEs. We will show that those coupled equations of motion can also be solved in the time domain according to the generalized-alpha scheme. An important problem is then associated with the selection of the parameters of the method. The presentation will be illustrated by academic and non-academic applications, for example in vehicle dynamics and in robotics. [less ▲]

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See detailImpact de tests formatifs organisés via la plateforme Web CT sur la réussite aux tests certificatifs
Hanzen, Christian ULg; Pluvinage, Pascal; Leclercq, Dieudonné ULg

in actes du colloque (2006, May)

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See detailPesticide residues in ACP countries: Hwo the process of harmonizing regulations on pesticide residues in EU ca affect crop protocols in ACP countries
Schiffers, Bruno ULg

in Abstracts 58th International Symposium on Crop Protection (2006, May)

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See detailDonnées biochimiques, sensorielles et fonctionnelles sur l'huile de noyaux de dattes
Besbes, S.; Blecker, Christophe ULg; Deroanne, C. et al

Conference (2006, May)

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See detailStudy of the Io footprint short timescale variability
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg

Poster (2006, May)

The electromagnetic interaction between Io and Jupiter leads to single or multiple auroral UV spots in both jovian hemispheres. This study concentrates on short timescale (~1 min) morphological changes of ... [more ▼]

The electromagnetic interaction between Io and Jupiter leads to single or multiple auroral UV spots in both jovian hemispheres. This study concentrates on short timescale (~1 min) morphological changes of the footprints. In order to achieve a sufficient time resolution, we use the time-tag mode of the HST/STIS instrument. This allows us to account for the spots blurring due to the rapid evolution of the jovian magnetic field lines. In addition to the spots motion, our analysis focuses on the spots brightness variations and on the correlation between these variations. The characterization of the parameters herein gives rise to both clues and new questions on the mechanisms that induce the precipitation of energetic electrons. [less ▲]

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See detailComposition chimique des graines de pin d'Alep (Pinus halepensis Mill.) d'origine tunisienne et caracterisation de la fraction lipidique.
Cheikh Rouhou, S.; Hentati, B.; Besbes, Souhail et al

Poster (2006, May)

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See detailBatardeaux de maintenance pour barrages mobiles: avantages et inconvénients
Rigo, Philippe ULg; Herbillon, Vincent ULg; Lizin, S. et al

in PIANC 2006, 31ème Congrès de l’PIANC, Estoril, Portugal, May 2006, (Article 083), (2006, May)

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See detailApplication of Higher-Order Harmonic Balance to Non-Linear Aeroelastic Systems
Dimitriadis, Grigorios ULg; Vio, Gareth Arthur; Cooper, Jonathan Edward

in Proceedings of the 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference (2006, May)

The influence of non-linearities on modern aircrafts is becoming of increasing impor- tance. The ability to accurately characterise LCOs and to predict at which speed they occur is very important. Higher ... [more ▼]

The influence of non-linearities on modern aircrafts is becoming of increasing impor- tance. The ability to accurately characterise LCOs and to predict at which speed they occur is very important. Higher Order Harmonic Balance (HOHB) methods have attracted some interest from the aeroelastic community over the last two decades. Such methods carry the promise of high quality stability prediction and Limit Cycle Oscillation (LCO) amplitude and frequency prediction for non-linear aeroelastic systems. In this paper, a Higher Order Harmonic Balance scheme is devised to extend the effectiveness of the method to systems undergoing secondary Hopf bifurcations. It is shown that the proposed harmonic shifting technique can allow the HOHB method to accurately estimate both branches of limit cycles occurring after the second bifurcation. [less ▲]

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See detailAsteroseismology of the β Cephei star KP Per
Saesen, S.; Briquet, Maryline ULg; De Cat, P. et al

Poster (2006, May)

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See detailRéforme de Bologne : quelles transformations de l’évaluation des apprentissages ?
Gorga, Adriana; Charlier, Bernadette; Gilles, Jean-Luc ULg

Conference (2006, May)

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See detailEffect Of Bovine Colostrum Supplementation On Cytokine mRNA Expression In Weaned Piglets
Boudry, Christelle ULg; Buldgen, André; Portetelle, Daniel ULg et al

in 10th International symposium on digestive physiology in pigs (2006, May)

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See detailFully automated heart rate variability assessment in dairy cows
Janda, Jozef; Guyot, Hugues ULg; Sandersen, Charlotte ULg et al

in Acta Physiologica (2006, May), 187(Suppl 651), -16

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See detailEnergy conservation and CO emissions of fuel oil boilers used in domestic heating
Cuevas, Cristian; Ngendakumana, Philippe ULg

Conference (2006, May)

According to the European standard, the CO emissions of new fuel oil boilers, whose output power is lower than 400 kW, are limited in steady-state regime to 110 mg/kWh of energy consumption. In order to ... [more ▼]

According to the European standard, the CO emissions of new fuel oil boilers, whose output power is lower than 400 kW, are limited in steady-state regime to 110 mg/kWh of energy consumption. In order to assess the performance of actual fuel oil boilers, an experimental work has been performed on a boiler available in the laboratory and whose output nominal power is about 370 kW. The two main parameters investigated are the nozzle capacity and the corresponding fuel injection pressure to keep the same burner consumption. Four nozzles whose capacity ranges from 30 to 45 kg/h at 20 bar were fitted on the burner equipping the fuel oil boiler. All the nozzles used are spill return and 45° type. To assess the CO emissions of the fuel oil boiler, tests have been performed in transient and steady-state regimes. The tests were performed so that the output power was kept constant in steady-state regime (same water flow rate and inlet and outlet temperatures). That is why for each nozzle tested, the fuel injection pressure has been adjusted in order to maintain the fuel mass flow rate at around 37.7 kg/h. On the other hand, the oxygen content of the flue gas in the chimney was kept constant (around 3%) by adjusting only the position of the burner air damper (the position of the flame holder was kept constant) and thus the air combustion mass flow rate. Classical gas analysers were used to measure the CO2, O2, CO and NOx concentrations in the flue gas. The tests performed showed that in steady-state regime, the CO emissions are very low compared to the European standard. On the other hand, in the transient regime (start-up regime for a cycling boiler), the CO emissions are not negligible and increase significantly if a high capacity nozzle is fitted on the fuel oil burner. In short, the paper demonstrates that in order to increase the boiler thermal efficiency and thus to reduce CO2 emissions (for the same output power), one has to avoid the CO emissions in the transient regime. When performing a replacement of the burner nozzle, a low capacity nozzle associated with an adjustment of a high fuel injection pressure is recommended, since a reduction of CO emissions in the starting-up regime is achieved and, on the other hand, the thermal efficiency and the pollutants emissions of the fuel oil boiler in steady state regime are not affected. [less ▲]

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See detailActivité biologique de la sève phloémique du palmier dattier Phoenix dactylifera L.
Ben Thabet, Imène; Francis, Frédéric ULg; Blecker, Christophe ULg et al

Poster (2006, May)

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See detailHow well do traffic engineering objective functions meet TE requirements?
Balon, Simon ULg; Skivée, Fabian ULg; Leduc, Guy ULg

in Lecture Notes in Computer Science (2006, May), 3976

We compare and evaluate how well-known and novel networkwide objective functions for Traffic Engineering (TE) algorithms fulfil TE requirements. To compare the objective functions we model the TE problem ... [more ▼]

We compare and evaluate how well-known and novel networkwide objective functions for Traffic Engineering (TE) algorithms fulfil TE requirements. To compare the objective functions we model the TE problem as a linear program and solve it to optimality, thus finding for each objective function the best possible target of any heuristic TE algorithm. We show that all the objective functions are not equivalent and some are far better than others. Considering the preferences a network operator may have, we show which objective functions are adequate or not. [less ▲]

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See detailContribution to a jaw behavior and deformation study
Mengoni, Marlène ULg; Limme, Michel ULg; Radu, Jean-Pol ULg et al

Conference (2006, May)

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See detailSelection and characterization of bacteriocin producing lactic acid bacteria for there use as protective culture on poultry meat.
Dortu, C.; Franz, Ch.; Kostinek, M. et al

Poster (2006, May)

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