References of "Scientific congresses and symposiums"
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See detailDoes treatment with erythropoietin improve left ventricular systolic performance and mitral regurgitation in patients with heart failure and chronic kidney disease?
Cosyns, B.; Lancellotti, Patrizio ULg; Velez-Roa, S. et al

in European Heart Journal (2006, August), 27(Suppl. 1), 339

Detailed reference viewed: 7 (0 ULg)
See detailAstroPoles : Astronomy from the Polar Plateaus; The astronomy program for the International Polar Year
Burton, M.; et al.; Surdej, Jean ULg et al

Poster (2006, August)

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See detailAbstract numeration systems : a survey.
Rigo, Michel ULg

Conference (2006, August)

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See detailDiversification among damselfishes (Pomacentridae): a comparison of ontogenetic trajectories
Frederich, Bruno ULg; Vandewalle, Pierre ULg

Poster (2006, August)

The Pomacentridae family, or damselfishes, includes more than 330 species living mainly in a coral reef environment. They have a complex life cycle involving a pelagic dispersion period of larvae and a ... [more ▼]

The Pomacentridae family, or damselfishes, includes more than 330 species living mainly in a coral reef environment. They have a complex life cycle involving a pelagic dispersion period of larvae and a juvenile and adult benthic life period associated to reef. The colonisation is associated with a metamorphosis allowing the fish to adapt to their new environment. Our study focused on morphological modifications, as skeletal shape changes, occurring during the development from settling larvae to juvenile and leading to diversification of adult species. To test allometry and to examine diversification in shapes, geometric morphometrics were used. This method, which allows description and statistical analysis of form, is applied to define ontogenetic shape changes and to compare allometries responsible for species diversification. It is applied here for skull structures involved in food capture as neurocranium, suspensorium, opercle, premaxillary bone and mandible. Six species were studied: Chromis viridis, Dascyllus aruanus, Dascyllus carneus, Pomacentrus pavo, Chrysiptera glauca and Stegastes nigricans. At the end of larval stage, structures in fishes are rather similar. None of the species has an isometric growth. Ontogenetic allometries concern each skeletal unit. The two species of Dascyllus are the lone to have a common ontogenetic transformation, and it appears that allometries giving the shapes’diversification correspond to ecological adaptations of each species. From a functional point of view, the general trend in skeletal shape changes corresponds to an optimisation of the suction feeding apparatus (for example: development in height and length of the suspensorium and opercle, shortening of the mandible). [less ▲]

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See detailRimonabant improves multiple cardiometabolic risk factors in diabetic and non-diabetic overweight/obese patients: data from RIO-diabetes, RIO-Europe, RIO-North America and RIO-Lipids
Scheen, André ULg; Despres, J. P.; Pi-Sunyer, F. X. et al

in European Heart Journal (2006, August), 27(Suppl. 1), 441

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See detailA case of periarticular abcess and suppurative arthritis of the atlanto-occipital joint
Van Galen, Gaby ULg; Lopez, Diego; Sandersen, Charlotte ULg et al

Poster (2006, August)

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See detailUse of X-ray tomography to study the influence of back mixing on the convective drying of sludges in a fixed bed
Léonard, Angélique ULg; Meneses, Eustedio; Le Trong, Emmanuel et al

in Farkas, Istvan (Ed.) Drying 2006, the Proceedings of the 15th International Drying Symposium, Budapest, Hungary, 20-23 August 2006, Vol B. (2006, August)

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See detailMemory in Contracts: The Experience of the EBRD (1991-2003)
Artige, Lionel ULg

Conference (2006, August)

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See detailLipase production by Yarrowia lipolytica: study of the effects of operating conditions by factorial design of experiments
Lopes, M.; Gomes, I.; Araújo, C. et al

in European Symposium on Biochemical Engineering Science : book of abstracts”. [S.l. : s.n. 2006] (2006, August)

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See detailEXPERIENCE GAINED BY THE APPLICATION OF A REAL-TIME VOLTAGE SECURITY ASSESSMENT METHOD AT THE HELLENIC TRANSMISSION SYSTEM OPERATOR
Christoforidis, George; Kabouris, John; Vournas, Costas et al

(2006, August)

Voltage instability is widely recognized as a significant threat of power system blackout. As far as real-time operation is concerned, there is a need for appropriate tools to identify dangerous ... [more ▼]

Voltage instability is widely recognized as a significant threat of power system blackout. As far as real-time operation is concerned, there is a need for appropriate tools to identify dangerous contingencies and assess security margins. The Hellenic Interconnected System presents a structural geographical imbalance between the main generation site and the main load center. This imbalance leads to bulk power transfers over long distances leading to voltage stability problems in areas of the southern system during heavy load conditions. In order to improve the operational practices, a realtime Voltage Security Assessment (VSA) tool has been installed at the National Control Center of the Hellenic Transmission System Operator (HTSO). The scope of VSA is the analysis of the impact of significant contingencies and the determination of security margins in terms of power transfers or power consumption in load areas. The computations performed within the VSA tool are based on a Quasi-Steady-State simulation, a fast time-domain method well suited to the analysis of long-term voltage stability phenomena. VSA is performed on the current system state, provided by the Energy Management System (EMS) state estimator. The VSA application incorporates functions for filtering the contingencies, determining secure operation limits, and deriving post-contingency PV curves for the identified dangerous contingencies. This paper is a description of the experience and the added value gained by the application of the real-time VSA, in parallel with the existing EMS, at the control center of HTSO. [less ▲]

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See detailCardiac resynchronisation therapy reduces the incidence of permanent atrial fibrillation in heart failure patients
Cosyns, B.; Lancellotti, Patrizio ULg; Hoffer, E. et al

in European Heart Journal (2006, August), 27(Suppl. 1), 332

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See detailGlobal climate warming and decline of the Black Grouse in western Europe: Are predictions reliable?
Loneux, Michèle ULg

in Journal of Ornithology (2006, August), 147(5, Suppl. 1), 203

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See detailThe proximate basis of adaptive micro-geographic variation in reproductive phenology in male and female Blue Tits
Caro, S.; Balthazart, Jacques ULg; Lambrechts, M.

in Journal of Ornithology (2006, August), 147(5, Suppl. 1), 47-48

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See detailRole of co-reactants during the formation of silica gels assessed by in situ SAXS
Gommes, Cédric ULg; goderis, bart; Pirard, Jean-Paul ULg et al

Conference (2006, August)

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See detailRapid effects of estrogens on sexual appetite and consummation in quail
Balthazart, Jacques ULg

in Journal of Ornithology (2006, August), 147(5, Suppl. 1), 56

Detailed reference viewed: 13 (5 ULg)
See detailFeasibility study of the diluted combustion in a semi-industrial domestic heating boiler at low temperatures
SEGGIO, Giovanni; Ngendakumana, Philippe ULg; PESENTI, Barbara et al

Conference (2006, August)

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main ... [more ▼]

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main difficulty is due to the high geometrical confinement and heat losses of a typical boiler combustion chamber, which prevents from getting the minimum level of reactants dilution and temperature needed to reach mild combustion regime. In this work, a preliminary CFD study has been performed to select a jet burner and secondary gas injector able to generate sufficient dilution and temperature of the air and gas jets before they meet in the combustion chamber of the boiler. [less ▲]

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See detailDeterminants of exercise-induced changes in e/ea in patients with chronic systolic left ventricular dysfunction
Lancellotti, Patrizio ULg; Cosyns, B.; Van Camp, G. et al

in European Heart Journal (2006, August), 27(Suppl. 1), 711

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See detailPreliminary evaluation of a protocol for fast localized abdominal sonography in horses (FLASH) admitted for colic
Busoni, Valeria ULg; De Busscher, Virginie; Lopez, Diego et al

Poster (2006, August)

Detailed reference viewed: 75 (14 ULg)
See detailA non-traumatic case of intracranial haemorrhage in a horse
Verwilghen, Denis ULg; Van Galen, Gaby ULg; Peters, Fabrice et al

Poster (2006, August)

Detailed reference viewed: 19 (10 ULg)
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See detailDiscrete-time synchronization on the N-torus
Sarlette, Alain ULg; Sepulchre, Rodolphe ULg; Leonard, Naomi

in Proceedings of the 17th MTNS Symposium, Kyoto 2006 (2006, August)

In this paper, we study the behavior of a discrete-time network of N agents, each evolving on the circle. The global convergence analysis on the N-torus is a distinctive feature of the present work with ... [more ▼]

In this paper, we study the behavior of a discrete-time network of N agents, each evolving on the circle. The global convergence analysis on the N-torus is a distinctive feature of the present work with respect to previous synchronization results that have focused on convergence in the Euclidean space (R^n)^N. We address the question from a control perspective, but make several connections with existing models, including the Hopfield network, the Vicsek model and the (continuous-time) Kuramoto model. We propose two different distributed algorithms. The first one achieves convergence to equilibria in shape space that are the local extrema of a potential U_L built on the graph Laplacian associated to a fixed, undirected interconnection topology; it can be implemented with sensor-based interaction only, since each agent just relies on the relative position of its neighbors. The second one achieves synchronization under varying and/or directed communication topology using local estimates of a consensus variable that are communicated between interacting agents. Both algorithms are based on the notion of centroid and can be interpreted as descent algorithms. The proposed approach can be extended to other embedded compact manifolds. [less ▲]

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See detailMapping and polymorphism of bovine ghreline gene
Colinet, Frédéric ULg; Eggen, André; Gengler, Nicolas ULg et al

in Proceedings of the 30th International Conference on Animal Genetics ISAG 2006 - Biodiversity, the future pass through preservation (2006, August)

Bovine ghrelin, a 27-amino-acid peptide has been identified in bovine oxyntic glands of the abomasum. It is an endogenous growth hormone secretagogue. Total mRNA was extracted from abomasum and complete ... [more ▼]

Bovine ghrelin, a 27-amino-acid peptide has been identified in bovine oxyntic glands of the abomasum. It is an endogenous growth hormone secretagogue. Total mRNA was extracted from abomasum and complete ghrelin mRNA was sequenced by rapid amplification of cDNA ends. The gene contains five exons and four introns with a short noncoding first exon of 17 bp similar to mouse and human ghrelin gene. Using a radiation hybrid panel, the gene was mapped to chromosome 22 near microsatellite markers UWCA49, BM4102, BMS1932, BM2613 and URB035 with good LOD Score. Some studies detected different QTLs near these markers like for milk fat percent, milk protein percent and somatic cell score. So, it would be interesting to study the polymorphism on the bovine ghrelin gene. Screening for polymorphisms in the five exons and the introns II and IV on ten Belgian Blue bulls, ten Holsteins bulls and ten Limousin bulls revealed a total of three single nucleotide polymorphisms. In order to evaluate if ghrelin could be involved in genetic variation for milk fat percent, milk protein percent and somatic cell score an association study between SNPs on ghrelin gene and these traits could be performed in a major cattle population. [less ▲]

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See detailMultiple Description Coding versus Transport Layer FEC for Resilient Video Transmission
Soldani, Cyril ULg; Verdicchio, Fabio; Leduc, Guy ULg et al

(2006, August)

Video content delivery is a challenging task due to its large bandwidth requirements and its sensitivity to transmission errors. In this context, simultaneously providing scalability and resilience ... [more ▼]

Video content delivery is a challenging task due to its large bandwidth requirements and its sensitivity to transmission errors. In this context, simultaneously providing scalability and resilience against transmission errors is of paramount importance. Layered video coding coupled with multicast video transmission employing no feedback provides the required scalability features and reduces the network burden. However, it is not easy to provide reliability in such environments. This is crucial to mobile users as error rates on wireless links can be high. To compensate for transmission errors, redundancy must be added to the video content. This can be added at the application layer by the employed video coding system, or can be added transparently by the transport layer. In this paper, we compare the performance obtained with a scalable wavelet-based video codec that adds redundancy using multiple description coding with the equivalent system adding redundancy at the transport level, using forward error correction. [less ▲]

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See detailAn Expert System for the Identification of Nonlinear Dynamical Systems
Dimitriadis, Grigorios ULg; Vio, Gareth Arthur; Shi, Dongfeng

in Huang, De-Shuang; Li, Kang; Irwin, George William (Eds.) Intelligent Computing (2006, August)

This paper describes an Expert System that can detect and quantify the nonlinearity present in a given dynamical system and, subsequently, determine and apply the most suitable nonlinear system ... [more ▼]

This paper describes an Expert System that can detect and quantify the nonlinearity present in a given dynamical system and, subsequently, determine and apply the most suitable nonlinear system identification method. The internal workings, algorithms and decision making processes of the Expert System are discussed. For demonstration purposes the Expert System is applied to a nonlinear experimental test-rig. The results show that the Expert System is an automatic tool that will detect nonlinearity, choose the best class of model for the system under investigation and perform optimal parameter estimation, so that the resulting identified models are parsimonious and accurate. [less ▲]

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See detailCO emissions of fuel oil boilers used in domestic heating
Cuevas, Cristian; Ngendakumana, Philippe ULg

Conference (2006, August)

To assess the CO emissions of fuel oil boilers, tests have been performed on a boiler in transient and steady state regimes. The tests were performed so that the output power (about 370 kW) was kept ... [more ▼]

To assess the CO emissions of fuel oil boilers, tests have been performed on a boiler in transient and steady state regimes. The tests were performed so that the output power (about 370 kW) was kept constant in steady state regime (same water flow rate and inlet and outlet temperatures). On the other hand, the oxygen content of the flue gas in the chimney was kept constant (around 3%). Classical gas analysers were used to measure the CO2, O2, CO and NOx concentrations in the flue gas. 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 a fuel supply pressure of 20 bar) were fitted on the burner equipping the fuel oil boiler. All the nozzles used are spill return and 45° spray angle type. The tests performed showed that in steady-state regime, the CO emissions are very low compared to the limits established by the European standard (110 mg/kWh of energy consumption). A comparison with calculated CO emissions shows also that the values obtained in equilibrium conditions are too high. 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 detailModelling of the convective drying of resorcinol-formaldehyde resins: influence of the drying conditions on the induces stress tensor
Léonard, Angélique ULg; Crine, Michel ULg; Jomaa, Wahbi

in Farkas, Istvan (Ed.) Drying 2006, the Proceedings of the 15th International Drying Symposium,Budapest, Hungary, 20-23 August 2006, Vol. A (2006, August)

Detailed reference viewed: 13 (0 ULg)
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See detailMapping and polymorphism of bovine ghreline gene
Colinet, Frédéric ULg; Eggen, André; Halleux, Caroline et al

Poster (2006, August)

Bovine ghrelin, a 27-amino-acid peptide has been identified in bovine oxyntic glands of the abomasum. It is an endogenous growth hormone secretagogue. Total mRNA was extracted from abomasum and complete ... [more ▼]

Bovine ghrelin, a 27-amino-acid peptide has been identified in bovine oxyntic glands of the abomasum. It is an endogenous growth hormone secretagogue. Total mRNA was extracted from abomasum and complete ghrelin mRNA was sequenced by rapid amplification of cDNA ends. The gene contains five exons and four introns with a short noncoding first exon of 17 bp similar to mouse and human ghrelin gene. Using a radiation hybrid panel, the gene was mapped to chromosome 22 near microsatellite markers UWCA49, BM4102, BMS1932, BM2613 and URB035 with good LOD Score. Some studies detected different QTLs near these markers like for milk fat percent, milk protein percent and somatic cell score. So, it would be interesting to study the polymorphism on the bovine ghrelin gene. Screening for polymorphisms in the five exons and the introns II and IV on ten Belgian Blue bulls, ten Holsteins bulls and ten Limousin bulls revealed a total of three single nucleotide polymorphisms. In order to evaluate if ghrelin could be involved in genetic variation for milk fat percent, milk protein percent and somatic cell score an association study between SNPs on ghrelin gene and these traits could be performed in a major cattle population. [less ▲]

Detailed reference viewed: 13 (0 ULg)
See detailVocal fold structure and voice pathology
FINCK, Camille ULg

Conference (2006, August)

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See detailMicrosystem array for live high voltage lines monitoring
Lilien, Jean-Louis ULg; Guerard, Suzanne ULg; Godard, Bertrand ULg et al

(2006, August)

The use of microsystems at very high electromagnetic fields on power lines to monitor movements.

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See detailWithin and across breeds differences in fatty acids profiles of milk and milk fat in dairy cows
Soyeurt, Hélène ULg; Dardenne, Pierre; Mayeres, Patrick et al

Poster (2006, August)

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See detailMeasurement of oxygen consumption and cardio-respiratory parameters in ridden horse
Votion, Dominique ULg; Caudron, Isabelle; Lejeune, jean-Philippe et al

in Pferdeheilkunde (2006, August), 22(5), 619-624

This study aimed at testing the feasibility of using the Cosmed K4 b2® portable telemetric gas analysis system to record metabolic parameters in ridden exercising horses. Adaptation of the Cosmed K4 b2® ... [more ▼]

This study aimed at testing the feasibility of using the Cosmed K4 b2® portable telemetric gas analysis system to record metabolic parameters in ridden exercising horses. Adaptation of the Cosmed K4 b2® to horses’ specificities included the design of an airtight face-mask (Equimask®) adapted to a hackamore bridle to allow ridding the horse. The portable system enables the recording of tidal volume (VT), respiratory rate (RR), minute expired volume (VE), pulmonary oxygen uptake (VO2), carbon dioxide delivery (VCO2), heart rate (HR) and speed. Four saddle horses equipped with the system completed 3 treadmill tests (TT1 to TT3) and 1 field test (FT) consisting of galloping phases at incremental speeds. Horses were sampled for blood lactate (LA) during the tests. The successive treadmill tests showed the influence of stress on measurements: with horses becoming accustomed to treadmill, LA and HR were reduced between TT1 and TT3. As VO2 is related to cardiovascular function, influence of stress resulted in higher VO2 in TT1 vs. TT3. The VO2 reached at maximal speed during treadmill tests was lower than the expected maximal aerobic power (VO2max) for trained saddle horses. During FT, the VO2 reached at the final gallop was lower than the VO2 recorded during any of the treadmill tests thus reflecting the increasing difficulty to reach VO2max with ridden horses in field conditions. This study demonstrated that cardiorespiratory parameters may be obtained in ridden horses during a field trial and opens new perspectives in the follow-up of sport horses in real field conditions. [less ▲]

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See detailLogiciel de cubage G-CUBE (version 1.1)
Lejeune, Philippe ULg; Rondeux, Jacques ULg

Poster (2006, July 31)

Logiciel développé dans le cadre de recherches visant à valoriser les potentialités de la forêt privée et assurer la durabilité de sa gestion.

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See detailTest comparatif de récepteur GPS
Lejeune, Philippe ULg; Rondeux, Jacques ULg

Poster (2006, July 31)

Des tests, en conditions d'utilisation réelles, ont été réalisés en vue de comparer les performances de différents récepteurs GPS "compact"

Detailed reference viewed: 90 (6 ULg)
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See detailParcellaire Forestier Informatisé
Lejeune, Philippe ULg; Rondeux, Jacques ULg

Poster (2006, July 31)

Cet outil a pour but de permettre aux propriétaires de parcelle(s) forestière(s) de déterminer un ou plusieurs objectifs de gestion et de les aider à élaborer un programme d'actions à entreprendre ... [more ▼]

Cet outil a pour but de permettre aux propriétaires de parcelle(s) forestière(s) de déterminer un ou plusieurs objectifs de gestion et de les aider à élaborer un programme d'actions à entreprendre (travaux et coupes) pour les rencontrer. [less ▲]

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See detailMissa pro defunctis – Gilles Hayne (1590-1650)
Corswarem, Emilie ULg

Conference (2006, July 27)

Detailed reference viewed: 28 (0 ULg)
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See detailThe Saccharomyces cerevisiae mitoproteome plasticity in response to recombinant alternative ubiquinol oxidase
Mathy, Grégory ULg

Poster (2006, July 20)

The energy-dissipating alternative oxydase (AOX) from Hansenula anomala was expressed in Saccharomyces cerevisiae. We have found that the recombinant product is properly addressed to the mitochondria ... [more ▼]

The energy-dissipating alternative oxydase (AOX) from Hansenula anomala was expressed in Saccharomyces cerevisiae. We have found that the recombinant product is properly addressed to the mitochondria where it was functional. A comparative analysis by two-dimensional differential in-gel electrophoresis (2D-DIGE) of mitochondrial protein patterns found in wild-type and recombinant AOX strains was performed. This analysis has shown that AOX expression affects energy-related enzymes in a very specific manner: 60 proteins exhibiting a significant difference in their abundance were identified and were implicated in major metabolic pathways such as Krebs cycle and amino-acid biosynthesis. At the level of the respiratory chain, we found a ~1.4-fold increase in the proton pumping complex III (ubiquinol-cytochrome c oxidoreductase), which competes with AOX for the reduced Q, as well as a ~1.7-fold increase in the succinate dehydrogenase that delivers electrons produced by the reduction of succinate to the Q pool. In addition, the NADH-cytochrome c reductase (MCR1) that transfers electrons from the externally-produced NADH directly to cytochrome c was ~1.4-fold greater in AOX+ mitochondria. This increase in MCR1 could force electrons to pass through the cytochrome c oxidase, the other proton pumps of the yeast respiratory chain. Up-regulation of the complex III as well as of MCR1 would influence the electron partitioning at the level of the Q pool in favour of the cytochrome pathway in order to diminish the impact of recombinant AOX on oxidative phosphorylation and energy conservation. Surprisingly, this up-regulation of the respiratory-chain was associated with a down-regulation of the ATP synthase complex. This decrease in ATP synthase content would allow the establishment of a novel steady state between the rate of ΔμH+ building and the rate of ΔμH+ consumption, favourable to the ATP synthase to perform ATP synthesis [less ▲]

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See detailStochastic Finite Element Analysis of Thermoelastic Effects in Micro-Resonators
Lepage, Séverine; Golinval, Jean-Claude ULg

Conference (2006, July 17)

In the design of micro-electromechanical systems (MEMS) such as micro-resonators, dissipation mechanisms may have detrimental effects on the quality factor. One of the major dissipation phenomena to ... [more ▼]

In the design of micro-electromechanical systems (MEMS) such as micro-resonators, dissipation mechanisms may have detrimental effects on the quality factor. One of the major dissipation phenomena to consider in such systems is thermoelastic damping. Hence, the performance of such MEMS is directly related to their thermoelastic quality factor which has to be predicted accurately. Moreover, the performance of MEMS can vary because manufacturing processes may leave substantial uncertainty in the geometry and in the material properties of the device. The reliability of MEMS devices is affected by the inability to accurately predict the stochastic behavior of the system due to the presence of these uncertainties. The aim of this paper is to provide a framework to account for uncertainties in the finite element analysis of the thermoelastic quality factor. The present work focuses on second moment approaches, in which the first two statistical moments, i.e. the mean and the variance, are estimated. The perturbation stochastic finite element method is used in order to determine the mean and the variance of the thermoelastic quality factor of MEMS. The perturbation SFEM [1] consists in a deterministic analysis complemented by a sensitivity analysis with respect to the random parameters. This enables the development of a Taylor series expansion of the response, from which the mean and variance of the response can be derived knowing the mean and variance of the random parameters. The perturbation SFEM is applied on the analysis of the thermoelastic quality factor of a micro-beam whose elastic modulus is considered as a random variable. Due to the nature of the thermoelastic problem, this study involves the calculation of eigenvalue sensitivities of a non-symmetric damped system [2]. The mean and variance of the quality factor are compared to the results obtained by Monte-Carlo simulations. References: [1] Kleiber, M., Hien, T.D., The stochastic finite element method: basic perturbation technique and computer implementation. Wiley & Sons, Chichester, 1992. [2] Choi, K.M., Jo, H.K., Kim, W.H., Lee, I.W., Sensitivity analysis of non-conservative eigensystems, Journal of Sound and Vibration, v. 274, p. 997-1011, 2004. [less ▲]

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See detailSafety and well-being at work.
Nyssen, Anne-Sophie ULg; Hansez, Isabelle ULg

Conference (2006, July 14)

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See detailDétermination des espèces bactériennes présentes dans TEC3 par analyse du polymorphisme de longueur de fragments de restriction de l’ADN codant pour l’ARN ribosomial 16S
Szalo, Mihaï; Lassence, Cédric ULg; Marlier, Didier ULg

in Proceedings 3ème colloque international de bactériologie francophone (2006, July 11)

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See detailRapport de synthèse des communications relevant de l'Histoire de l'art
Fagnart, Laure ULg

Conference (2006, July 09)

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Peer Reviewed
See detailLe vocabulaire de la parenté dans l'Atlas linguistique de la Wallonie
Baiwir, Esther ULg

Poster (2006, July 07)

Detailed reference viewed: 20 (2 ULg)
See detailThe HST campaign
Gérard, Jean-Claude ULg

Conference (2006, July 06)

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See detailPotential antimalarial activity of indole alkaloids
Angenot, Luc ULg

Conference (2006, July 06)

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See detailThe effect of exchange rate variability on us shareholder wealth
Muller, Aline ULg; Verschoor, Willem

Conference (2006, July 05)

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See detailThe 4m international liquid mirror telescope (ILMT)
Surdej, Jean ULg; Absil, Olivier ULg; Bartczak, Przemyslaw ULg et al

in Stepp, Larry (Ed.) Ground-based and Airborne Telescopes (2006, July 01)

The entire funding has recently been obtained in Belgium for the construction of a 4m Liquid Mirror Telescope. Its prime focus will be equipped with a semi-conventional glass corrector allowing to correct ... [more ▼]

The entire funding has recently been obtained in Belgium for the construction of a 4m Liquid Mirror Telescope. Its prime focus will be equipped with a semi-conventional glass corrector allowing to correct for the TDI effect and a thinned, high quantum efficiency, 4K × 4K pixel equivalent CCD camera. It will be capable of subarcsecond imaging in the i'(760 nm) and possibly r', g' band(s) over a field of ~ 30' in diameter. This facility will be entirely dedicated to a deep photometric and astrometric variability survey over a period of ~ 5 years. In this paper, the working principle of liquid mirror telescopes is first recalled, along with the advantages and disadvantages of the latter over classical telescopes. Several science cases are described. For a good access to one of the galactic poles, the best image quality sites for the ILMT are located either in Northern Chile (latitude near -29°30') or in North-East India (Nainital Hills, latitude near +29°30'). At those geographic latitudes, a deep (i' = 22.5 mag.) survey will approximately cover 90 square degrees at high galactic latitude, which is very useful for gravitational lensing studies as well as for the identification of various classes of interesting galactic and extragalactic objects (cf. microlensed stars, supernovae, clusters, etc.). A description of the telescope, its instrumentation and the handling of the data is also presented. [less ▲]

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See detailALADDIN: an optimized nulling ground-based demonstrator for DARWIN
Coudé du Foresto, V.; Absil, Olivier ULg; Swain, M. et al

in Monnier, John; Schöller, Markus; Danchi, William (Eds.) Advances in Stellar Interferometry (2006, July 01)

The ESA Darwin space mission will require a ground based precursor to i/ demonstrate nulling interferometry in an operational context and ii/ carry out some precursor science, such as the characterization ... [more ▼]

The ESA Darwin space mission will require a ground based precursor to i/ demonstrate nulling interferometry in an operational context and ii/ carry out some precursor science, such as the characterization of the level of exozodiacal light around the main Darwin targets. These are the stated objectives of the GENIE nulling instrument that was studied for the VLTI. We argue here that the same objectives can be met in a more efficient way by an antarctic-based nulling experiment. The ALADDIN mission concept is an integrated L-band nulling breadboard with relatively modest collectors (1m) and baseline (40m). Because of its privileged location, this is suffcient to achieve a sensitivity (in terms of detectable zodi levels) which is 1.6 to 3.5 times better than GENIE at the VLTI, bringing it below the 20-zodi threshold value identified to carry out the Darwin precursor science. The integrated design enables top-level optimization and full access to the light collectors for the duration of the experiment, while reducing the complexity of the nulling breadboard. [less ▲]

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See detailConceptual design of the ALADDIN Antarctic nulling interferometer
Barillot, Marc; Courteau, Pascal; Absil, Olivier ULg et al

in Monnier, John; Schöller, Markus; Danchi, William (Eds.) Advances in Stellar Interferometry (2006, July 01)

It is commonly accepted that highly challenging planet finding missions such as Darwin and TPF need precursors on the ground, for both technological demonstration and study of the exozodiacal clouds ... [more ▼]

It is commonly accepted that highly challenging planet finding missions such as Darwin and TPF need precursors on the ground, for both technological demonstration and study of the exozodiacal clouds around potential targets. A first instrument, GENIE, designed to be implemented in the interferometric laboratory of the VLTI, was studied by ESA and scientific/industrial teams. In this paper we present a concept for ALADDIN, an operational nulling instrument to be implemented at Dome C in Antarctica, and discuss the comparison with GENIE from the instrumental point of view. Our preliminary design involves moderate ~1m size telescopes mounted on a 40m long rotating beam allowing baselines up to 30m and feeding a 2-arm nulling beam combiner. When compared to GENIE, the rotating beam design has the advantage of removing the need for both long-stroke delay line and dispersion control equipments. As a side effect, the instrumental arrangement of ALADDIN finds itself more representative of what Darwin will be. Furthermore, critical issues like phase control, photometric balance and instrumental background suppression are expected to be relaxed by the improved atmospheric conditions, lower temperature, and simpler optical trains. Calibration of geometrical stellar leakage will make advantage of the continuously adjustable baseline. As results, a simpler instrument showing improved performance is expected. In conclusion, we see our ALADDIN concept as a valuable alternative to GENIE, with a quite stronger scientific potential and a considerably simplified instrumental design. [less ▲]

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See detailInfrared achromatic phase shifters using modulated total internal reflection
Mawet, Dimitri; Lenaerts, Cédric; Riaud, Pierre ULg et al

in Monnier, John D; Schöller, Markus; Danchi, William C (Eds.) Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series "Advances in Stellar Interferometry" - SPIE Conference 6268 (2006, July 01)

We propose a new family of achromatic phase shifters that uses the modulated total internal reflection (TIR) phenomenon. These components can be seen as enhanced Fresnel rhombs for infrared applications ... [more ▼]

We propose a new family of achromatic phase shifters that uses the modulated total internal reflection (TIR) phenomenon. These components can be seen as enhanced Fresnel rhombs for infrared applications like nulling interferometry and polarimetry. The TIR phenomenon comes with a differential phase shift between the polarization components of the incident light. Modulating the index transition at the TIR interface allows compensating for the intrinsic material dispersion in order to make the subsequent phase shift achromatic over broad bands. The modulation can be induced by a thin film of a well-chosen medium or a subwavelength grating whose parameters are specially optimized. We present results from theoretical simulations together with preliminary fabrication outcomes. [less ▲]

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See detailPegase: a space-based nulling interferometer
Le Duigou, J. M.; Ollivier, M.; Léger, A. et al

in Mather, John C.; MacEwen, Howard A.; de Graauw, Mattheus W. M. (Eds.) Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter (2006, July 01)

The space based mission Pegase was proposed to CNES in the framework of its call for scientific proposals for formation flying missions. This paper presents a summary of the phase-0 performed in 2005. The ... [more ▼]

The space based mission Pegase was proposed to CNES in the framework of its call for scientific proposals for formation flying missions. This paper presents a summary of the phase-0 performed in 2005. The main scientific goal is the spectroscopy of hot Jupiters (Pegasides) and brown dwarfs from 2.5 to 5 mum. The mission can extend to other objectives such as the exploration of the inner part of protoplanetary disks, the study of dust clouds around AGN,... The instrument is basically a two-aperture (D=40 cm) interferometer composed of three satellites, two siderostats and one beam-combiner. The formation is linear and orbits around L2, pointing in the anti-solar direction within a +/-30° cone. The baseline is adjustable from 50 to 500 m in both nulling and visibility measurement modes. The angular resolution ranges from 1 to 20 mas and the spectral resolution is 60. In the nulling mode, a 2.5 nm rms stability of the optical path difference (OPD) and a pointing stability of 30 mas rms impose a two level control architecture. It combines control loops implemented at satellite level and control loops operating inside the payload using fine mechanisms. According to our preliminary study, this mission is feasible within an 8 to 9 years development plan using existing or slightly improved space components, but its cost requires international cooperation. Pegase could be a valuable Darwin/TPF-I pathfinder, with a less demanding, but still ambitious, technological challenge and a high associated scientific return. [less ▲]

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See detailDetection of the inner-debris disk of Vega with CHARA/FLUOR
Absil, Olivier ULg; Di Folco, Emmanuel; Mérand, Antoine et al

in Monnier, John; Schöller, Markus; Danchi, Willian (Eds.) Advances in Stellar Interferometry (2006, July 01)

Using the FLUOR beam-combiner installed at the CHARA Array (Mt. Wilson, CA), we have obtained highprecision visibility measurements of Vega, one of the prototypic debris-disk stars, known to be surrounded ... [more ▼]

Using the FLUOR beam-combiner installed at the CHARA Array (Mt. Wilson, CA), we have obtained highprecision visibility measurements of Vega, one of the prototypic debris-disk stars, known to be surrounded by a large amount of cold dust in a ring-like structure at 80-100 AU. The combination of short and long baselines has allowed us to separately resolve the stellar photosphere and the close environment of the star (less than 8 AU). Our observations show a significant deficit in square visibility at short baselines with respect to the expected visibility of a simple UD stellar model (DeltaV2 equal or equivalent to 2%), suggesting the presence of an extended source of emission around Vega. The sparse (u, v) plane coverage does not allow the discrimination between a point source and an extended circumstellar emission as the source of the extended emission. However, we show that the presence of a point-like source within the FLUOR field-of-view (1" in radius, i.e., 7.8 AU at the distance of Vega) is highly unlikely. The excess emission is most likely due to the presence of hot circumstellar dust in the inner part of Vega's debris disk, with a flux ratio of 1.29 plus or minus 0.19% between the integrated dust emission and the stellar photosphere. Complementing this result with archival photometric data in the near- and mid-infrared and taking into account a realistic photospheric model for the rapidly rotating Vega, we derive the expected physical properties of the circumstellar dust by modelling its Spectral Energy Distribution. The inferred properties suggest that the Vega system could be currently undergoing major dynamical perturbations. [less ▲]

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See detailVerbal short-term memory, genes and neuro-developmental disorders.
Majerus, Steve ULg

Conference (2006, July)

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See detailEtude de la nature des unités morphologiques utilisées dans la reconnaissance des mots écrits chez les dyslexiques
Quemart, Pauline ULg; Casalis, Séverine; Colé, Pascale

Poster (2006, July)

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See detailFrequency halving due to vortex pairing for the jet-slot oscillator
Billon, Alexis ULg; Glesser, Martin; Valeau, Vincent et al

Conference (2006, July)

At the outlet of the HVCA systems, whistling can occur, due to self-sustained oscillations. In this study, the ventilation outlet is modelled by a free plane subsonic jet impinging on a slotted plate ... [more ▼]

At the outlet of the HVCA systems, whistling can occur, due to self-sustained oscillations. In this study, the ventilation outlet is modelled by a free plane subsonic jet impinging on a slotted plate, leading to self-sustained tones production; this configuration is known as the jet-slot oscillator. The tone's frequency can be predicted through the vortex dynamics within the flow. For jet velocities higher than 16m/s, the tones couple with the flow-supply-duct’s resonances. These resonances control the vortex dynamics and reinforce the sound production, of about 20dB. Moreover, when the distance from the jet exit to the plate is increased and reaches 4.5 times the jet height, the fundamental frequency of the tones is suddenly halved due to some vortex pairing occurring at the end of the potential core of the jet. In this paper, the vortex pairing is observed with three different experimental techniques. Firstly, comparison between the radiated and the in-duct acoustic fields is conducted. Then the energy transfer from the fundamental to the sub-harmonics of the shear layer's velocity fluctuations is observed with anemometric measurements. Finally high speed flow visualizations are performed and allow to link the vortex impingement on the plate to the sound production. [less ▲]

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See detailPharmacological evaluation of TP receptor antagonists characterized by differential activity on alpha and beta isoforms
Hanson, Julien ULg; Ghiotto, J.; Neven, P. et al

in Acta Pharmacologica Sinica (2006, July), 27

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See detailUnderstanding and supporting collaborative design using an horizontal tabletop display
Safin, Stéphane ULg; Leclercq, Pierre ULg; Decortis, Françoise ULg

in Proceedings of the IEA2006. 16th World Congress on Ergonomics (2006, July)

Based on our research on evaluating a Virtual desk environment for architects and designers is it possible to derive requirements for supporting collaborative design activities ? We first examine ... [more ▼]

Based on our research on evaluating a Virtual desk environment for architects and designers is it possible to derive requirements for supporting collaborative design activities ? We first examine questions related to internal and external interactions in architectural design, to the role of external representations and their extension as shared objects of design in collaborative horizontal tabletop. Then we describe the Virtual Desktop and the EsQUIsE software. We will synthesize the results of our former investigations on this setting, in order to derive new orientations for the design and research. [less ▲]

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See detailA nation-wide pilot project for early rehabilitation of low back pain workers
Mairiaux, Philippe ULg; DELARUELLE D.; STRAUSS, Patrick

in IEA 2006 Proccedings (2006, July)

As a result of both a political and a scientific thinking, the Belgian Fund for Occupational Diseases (FOD) has launched, starting March 1st 2005, a pilot project for the nursing staff in the health care ... [more ▼]

As a result of both a political and a scientific thinking, the Belgian Fund for Occupational Diseases (FOD) has launched, starting March 1st 2005, a pilot project for the nursing staff in the health care sector in order to prevent the transition of low back pain (LBP) to chronicity through a program promoting an early return to work. Target workers are those being off work due to LBP for at least 4 weeks and maximum 3 months. The program involves a standardised multidisciplinary back rehabilitation program on the one hand, and on the other hand an ergonomics intervention in the health care institution. Depending on the context, the workplace intervention may involve an ergonomic analysis with the participation of the sicklisted worker, a larger group-based ergonomics redesign, or temporary change in the worker duty or work time in order to facilitate his/her return to work. The employer gets a financial incentive from the FOD when he agrees to such an intervention. Due to a lack of communication among the target population, this pilot project has had a slow start; the presentation gives a qualitative overview of the first 100 cases having entered the program. [less ▲]

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See detailEnergetic and Environmental Aspects of a Diesel Engine Using Rapeseed Oil as Fuel
Christiaens, Sébastien; Bruylants, Grégory; Ngendakumana, Philippe ULg

in 19th International Conference on Efficiency, Cost, Optimization , Simulation and Environmental Impact of Energy Systems (ECOS 2006) (2006, July)

This paper describes the experiment that was carried out at the Thermodynamics Laboratory of the University of Liège (Belgium) to study the impact of the use of vegetable oil as a substitute for light oil ... [more ▼]

This paper describes the experiment that was carried out at the Thermodynamics Laboratory of the University of Liège (Belgium) to study the impact of the use of vegetable oil as a substitute for light oil on the short-term performance of Diesel engines for cars. The vegetable oil selected is derived directly from rapeseed without any refinement processes. Five tests were carried out, going from 0% rapeseed oil blended in conventional Diesel fuel (reference fuel) up to 100% rapeseed oil. For each test, the whole operating range of the engine was swept and the fuel consumption and exhaust emissions measured simultaneously. The study concludes that the engine used during the research can be run with 100% unrefined rapeseed oil. Nevertheless, using 100% oil is not considered as a valid large scale solution. However, using a smaller percentage of rapeseed oil gives promising results in terms of reduction of CO2 emission as well as reduction of the opacity of the exhaust gases. [less ▲]

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See detailPower lines real time monitoring
Lilien, Jean-Louis ULg; Guerard, Suzanne ULg; Godard, Bertrand ULg et al

in Zamrik, Sam Y. (Ed.) Proceedings of the 11th ICPVT conference (2006, July)

How to access real time data of ampacity of power lines.

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See detailUltraviolet spectroscopy of giant planets's aurora with HST/STIS, FUSE and Cassini/UVIS
Gustin, Jacques ULg; Gérard, Jean-Claude ULg; Pryor, Wayne et al

Conference (2006, July)

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See detailDevelopment of An Expert System for the Identification of Nonlinear Vibrating Systems
Dimitriadis, Grigorios ULg; Vio, Gareth Arthur; Shi, Dongfeng

in Brennan, M. J.; Liguore, S.; Mace, B. R. (Eds.) et al Proceedings of the IX International Conference on Recent Advances in Structural Dynamics (2006, July)

The aim of the present work is to attempt to create a logical framework to be used for the identification of nonlinear systems. It is assumed that no single identification method is general enough to work ... [more ▼]

The aim of the present work is to attempt to create a logical framework to be used for the identification of nonlinear systems. It is assumed that no single identification method is general enough to work with a significant range of systems. Therefore, this framework is based on the development of an Expert System that will detect and quantify the nonlinearity present in a given dynamical system and, subsequently, determine and apply the most suitable nonlinear system identification method or methods. [less ▲]

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See detailEmotional valence influences the rates of false memories
Dehon, Hedwige ULg; Van der Linden, Martial; Laroi, Frank ULg

Poster (2006, July)

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See detailPotential antimalarial activity of indole alkaloids
Angenot, Luc ULg

in 42nd International meeting on medicinal chemistry- Program and abstracts (2006, July)

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See detailChlamydophila psittaci chez les canards d’élevages et d’ornement en Région Wallonne
Delleur, Valery ULg; Marlier, Didier ULg

in Proceedings du 3ème colloque international de bactériologie francophone (2006, July)

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See detailThermo-hygro-mechanical modelling of the convective drying of resorcinol-formaldehyde xerogel monoliths
Léonard, Angélique ULg; Crine, Michel ULg; Jomaa, Wahbi

in Proceedings of Carbon 2006 (2006, July)

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See detailThe impact of translated tests on student' performances
Baye, Ariane ULg; Lafontaine, Dominique ULg

Conference (2006, July)

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See detailSurgical alternative for bladder tumors involving the trigone: preliminary results in two bitches
Saulnier-Troff, François-Guillaume; Busoni, Valeria ULg; Hamaide, Annick ULg

Poster (2006, July)

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See detailStatistical analysis of electrophoresis results in External Quality Assessment schemes
Zhang, Lixin ULg; Libeer, Jean-Claude; Hamers, Nicole et al

Poster (2006, July)

The goal of External Quality Assessment (EQA) schemes is to ensure that results obtained on a particular specimen in a given clinical laboratory do not differ significantly from those obtained by other ... [more ▼]

The goal of External Quality Assessment (EQA) schemes is to ensure that results obtained on a particular specimen in a given clinical laboratory do not differ significantly from those obtained by other laboratories on the same specimen. Hence, EQA aims at improving inter-laboratory agreement. Classically, the same blind control specimen is sent to all laboratories and test results are returned to the EQA organizer and analyzed statistically. Robust methods are used to estimate the mean (target value) and standard deviation (SD, inter-laboratory variability) because of the frequent presence of outliers. Laboratories are considered as “poor performers” if their results depart from the target value by a given threshold (e.g., 3×SD). Serum protein electrophoresis is a laboratory test which yields five fractions (albumin, α1, α2, β and γ) which sum up to 100%. So far, EQA schemes have analyzed the five fractions separately as for ordinary tests. Thus, a laboratory is qualified as a poor performer if at least one fraction is out of range. This approach does not take into account the other fractions and the linear relationship between them. A novel statistical approach has been developed to analyze EQA electrophoresis results from a global standpoint by using multivariate standard and robust methods to eliminate the effect of outlying profiles. When applied to electrophoresis data from the Belgian EQA scheme (n = 189 laboratories), the approach has shown that other laboratories should be considered as poor performers than by the classical univariate method. It has also highlighted the need for taking into account the type of electrophoresis assay in judging the laboratory performance. The method will be implemented routinely in the Belgian EQA scheme. [less ▲]

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See detailStudy of the dynamics of water adsorption on activated carbon by a combination of high resolution x-ray microtomography and breakthrough measurements
Lodewyckx, Peter; Wullens, Hilda; Léonard, Angélique ULg et al

in Proceedings of Carbon 2006 (2006, July)

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See detailCalcification outcome in renal disease (CORD) - A prospective epidemiological multinational study: An analysis of the segmental distribution and severity of calcification of the abdominal aorta in dialysis patients
Honkanen, E.; Kauppila, L.; Wikstrom, B. et al

in Nephrology Dialysis Transplantation (2006, July), 21(Suppl. 4), 408-409

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See detailAssessment of Ultimate Bending Moment of Ships from a Reliability Point of View, Using Independent Perturbations Method
Toderan, Catalin; Richir, Thomas; Caprace, Jean-David ULg et al

in Network for Integrating Structural Safety, Risk and Reliability (ASRANet) (2006, July)

This paper presents a method to asses hull girder ultimate bending moment distribution, taking into account parameters uncertainty. This method is a part of a research activity carried out at University ... [more ▼]

This paper presents a method to asses hull girder ultimate bending moment distribution, taking into account parameters uncertainty. This method is a part of a research activity carried out at University of Liege. The method is able to compute four statistical moments of ultimate strength distribution: average, standard deviation, skewness and kurtosis. Geometry parameters, material parameters and initial imperfections (initial deflections and residual stresses) are considered as random variables and a distribution is associated to each of them. Ultimate bending moment algorithm is a progressive collapse analysis based on Smith method and associated with the load-end shortening model proposed by Bureau Veritas and Joint Bulker Project Rules (JBP). In order to perform a reliability analysis, this algorithm is coupled with independent perturbations method. The advantage is a lower number of simulations compared to the standard Monte-Carlo procedure and a good use of the initial information that is available. The paper contains also a comparative analysis between the presented method and a linear sensitivity analysis performed by the ISSC 2000 “Ultimate Strength” committee for a VLCC structure. [less ▲]

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See detailPreoperative Brain Image Update with FEM- and XFEM-based Biomechanical Model
Vigneron, Lara; Boman, Romain ULg; Robe, Pierre et al

in 7th World Congress on Computational Mechanics (2006, July)

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See detailExperimental Study of the Integration of a Scroll Expander into a Heat Recovery Rankine Cycle
Lemort, Vincent ULg; Teodorese, Ion

(2006, July)

This study investigates the possibility to associate a scroll expander to a heat recovery Rankine cycle, working with water. In view to develop such a scroll expander, three scroll compressors are adapted ... [more ▼]

This study investigates the possibility to associate a scroll expander to a heat recovery Rankine cycle, working with water. In view to develop such a scroll expander, three scroll compressors are adapted to be run in expander mode. The three tested expanders are fed with water steam and air. Two of them need to be lubricated. The third expander is also fed with a binary mixture of water and propylene glycol. A model of scroll expander is proposed and validated. [less ▲]

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See detailA finite element analysis of spatial solitons in optical fibres
Drouart, F.; Nicolet, A.; Renversez, G. et al

in Proceedings of the 7th conference on Electrical, Transport and Optical Properties of Inhomogeneous Media (ETOPIM 7) (2006, July)

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See detailAntiprotozoal and cytotoxic triterpenoid saponins from the roots of Cephalaria gigantea
Tabatadze, Nino; Elias, Riad; Delmas, F. et al

Poster (2006, July)

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See detailEffects of oral supplementation with bovine colostrum on the immunity of weaned piglets
Boudry, Christelle ULg; Buldgen, André; Dehoux, Jean-Paul

in Proccedings of the 19th International Piv Veterinary Society Congress (2006, July)

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See detailCritical points for Salmonella contamination during slaughter process in Belgian slaughterhouses.
De Saedeleer, L.; Maes, D.; Dewulf, J. et al

in International Pig Veterinary Society Congress (2006, July)

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