References of "Scientific congresses and symposiums"
     in
Bookmark and Share    
Peer Reviewed
See detailProtocols for building an Organic Chemical Ontology
Colaux, Catherine ULg

Conference (2006, October)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailA new technique of stereotactic permanent breast seed implantation
Jansen, Nicolas ULg; Nickers, Philippe ULg

in Radiotherapy & Oncology (2006, October), 81(Suppl. 1), 249-250

Detailed reference viewed: 42 (7 ULg)
Full Text
Peer Reviewed
See detailHypersensitivity to Electricity: The effect of the current waveform on the perception level
Mattivi, Brice; Beauvois, Véronique ULg; Dular, Patrick ULg et al

in Proceedings of the 4th Int Workshop on Biological Effects of Electromagnetic Fields (2006, October)

Hypersensitivity to electricity has been reported many times in the literature. From another point of view, numerous measurements have been performed on perception level. Even if it appears that part of ... [more ▼]

Hypersensitivity to electricity has been reported many times in the literature. From another point of view, numerous measurements have been performed on perception level. Even if it appears that part of the population has a lower perception level of current, there is no clear link with the so called “hypersensitivity to electricity” which is more related to declared physiological disorders in part of the population (sleeping problem, headache ...). Such declared hypersensitivity is currently not yet related to any biological parameter. Our research team is currently trying to determine a relationship between hypersensitive declared people and the perception level when injecting current in the low frequency range 50-1000 Hz. We have performed current perception tests with individuals under different conditions (different wave shapes, frequencies, influence of external electric field, male and female...) using a particular protocol and our own designed system for current injection. This paper will present our test system design (current injector, wave shape converter, safety aspects) and our first results based on both sine wave (different frequencies) and wide band signal. [less ▲]

Detailed reference viewed: 68 (10 ULg)
Full Text
See detailIncorporation in bread of dietary fibres from by-products of the agro-transformations.
Roiseux, Olivier; Blecker, Christophe ULg; Vandebeke, E. et al

Poster (2006, October)

Detailed reference viewed: 11 (2 ULg)
Full Text
Peer Reviewed
See detailComparaison de techniques de validation dynamique de données
Heyen, Georges ULg; Gerkens, Carine ULg; Mateus, Miguel et al

(2006, October)

Detailed reference viewed: 39 (7 ULg)
Full Text
See detailSyntactictal and automatic properties of sets of polynomials over finite fields
Rigo, Michel ULg

Conference (2006, October)

Detailed reference viewed: 13 (1 ULg)
Peer Reviewed
See detailLes femmes entrepreneures et la transmission d’entreprise
Constantinidis, Christina ULg; Cornet, Annie ULg

Conference (2006, October)

Detailed reference viewed: 65 (9 ULg)
Full Text
Peer Reviewed
See detailEmpirical regression models using NDVI, rainfall and temperature data for the early prediction of wheat grain yields in Morocco
Balaghi, Riad; Tychon, Bernard ULg; Eerens, H. et al

Conference (2006, October)

In Morocco, no operational system actually exists for the early prediction of the grain yields of bread wheat. This study proposes empirical Ordinary Least Squares regression models to forecast the yields ... [more ▼]

In Morocco, no operational system actually exists for the early prediction of the grain yields of bread wheat. This study proposes empirical Ordinary Least Squares regression models to forecast the yields at provincial and national levels. The predictions were based on dekadal (10-daily) NDVI/AVHRR, dekadal rainfall sums and average monthly air temperatures. The global land cover map GLC2000 was used to select only the NDVI pixels that are related to agricultural lands. Provincial yields were assessed with errors varying from 80 to 762 kg.ha-1, depending on the province. At national level, yield was predicted at the third dekad of April with 73 kg.ha-1 error, using NDVI and rainfall. However, earlier forecasts are possible, starting from the second dekad of March with 84 kg.ha-1 error. At the province and country levels most of the yield variation was accounted for by NDVI. The proposed models can be used in an operational context to forecast bread wheat yields in Morocco. [less ▲]

Detailed reference viewed: 38 (3 ULg)
Peer Reviewed
See detailRethinking Flexicurity at the work situations level
Pichault, François ULg; Xhauflair, Virginie ULg

Conference (2006, October)

Detailed reference viewed: 10 (1 ULg)
Full Text
See detailInfluence of chemical composition on the microstructure and mechanical properties of multiphase TRIP-assisted steels, processed using thermal cycles compatible with continuous hot-dip galvanizing
Mertens, Anne ULg; McDermid, Joseph R.

in Proceedings of the MS&T'06 Conference (2006, October)

Multiphase TRIP-assisted steels are particularly interesting for the automotive industry, as they exhibit an exceptional strength-ductility balance due to the combination of a multiphase microstructure ... [more ▼]

Multiphase TRIP-assisted steels are particularly interesting for the automotive industry, as they exhibit an exceptional strength-ductility balance due to the combination of a multiphase microstructure and the mechanically-induced transformation of metastable austenite to martensite (i.e. the TRIP effect). The multiphase microstructure - and the retention of metastable austenite - is achieved through the combination of appropriate chemistry and heat treatment conditions, i.e. an intercritical anneal followed by an isothermal dwell in the temperature range for bainite formation. The present work focuses mainly on the effect of heat treatment conditions that are compatible with CGL process, i.e. a high bainitic dwell temperature, on the microstructure and mechanical properties of two TRIP-assisted steel grades differing by their silicon and aluminium contents. It has thus been established that it seems easier to retain austenite when Si is replaced by Al, and more particularly that it was possible to retain a significant amount of austenite in a mixed 0.5Al-1.0Si grade, and hence to observe a TRIP effect. On the other hand, a Si-alloyed grade did not exhibit a significant retention of austenite, possibly due to carbide precipitation. It has also be seen that the intercritical annealing temperature has a strong influence on the amount of austenite that can ultimately be retained after the bainitic dwell, possibly by affecting the C content in the intercritical austenite. [less ▲]

Detailed reference viewed: 45 (2 ULg)
Full Text
See detailIsolation of insecticidal proteins within the pea seeds (Pisum sativum L.)
Cuartero Diaz, Gaëtan; Francis, Frédéric ULg; Portetelle, Daniel ULg et al

Poster (2006, October)

Consequently with the pressure exerted by chemical pesticides on environment, and the awakening of politics, the demand for bio-pesticides is increasing. Nevertheless, supply is not sufficient, and ... [more ▼]

Consequently with the pressure exerted by chemical pesticides on environment, and the awakening of politics, the demand for bio-pesticides is increasing. Nevertheless, supply is not sufficient, and moreover those products are not competing enough. In this context, the aim of this research is to set up a biological insecticide, which is economic, with vegetal proteins resulting from alimentary industry, here the pea, Pisum sativum L.. A group of proteins, which is quite easy to highlight, is present in relatively important proportions (2%) in pea seeds, it’s the lectins class. Insecticidal effects of lectins from different organisms have already been proved. Indeed, by binding to membrane glycosyl groups of digestive tract cells, lectins can be very toxic for a lot of insects. Thus initially we focus our investigations on Pisum sativum lectins (PSL). First, PSL have been localised within the industrial process among different extraction juices. Then, a chromatography has been performed on the selected juice with FPLC technology. Although the matrix used for this chromatography, sephadex G75, is a banal bed for gel filtration, it is in this case a real combination between classical gel filtration and affinity chromatography. Indeed due the particular properties of lectins, they fixed carbonyl group of the bed and have to be eluted after the filtration part with a solution of glucose. Then the collected fractions corresponding to UV-peaks on the chromatogram were separated by electrophoresis 2D and identified by mass spectrometry (ESI MS/MS) coupled with data bank investigations. Secondly bioassays using artificial diets have been developed on Myzus persicae in the aim to study the aphicid effects of theses fractions with rm and LC50.These estimators show significant mortality rates but also change in the fecundity and in the development of nymph. [less ▲]

Detailed reference viewed: 78 (9 ULg)
Full Text
Peer Reviewed
See detailEffects of vagal nerve stimulation in the rat orofacial formalin model of pain
Multon, Sylvie ULg; Scholsem, Martin; LEGRAIN, Caroline ULg et al

in Book of Abstracts of the 36th Annual Meeting Society for Neuroscience (Oct 2006) (2006, October)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailDistribution of nerve fibres in bovine and human mucosal associated lymphoid tissues
Defaweux, Valérie ULg; Dorban, G.; Antoine, Nadine ULg et al

Poster (2006, October)

Prion cell tropism varies significantly among animal species, depending on both the agent strain and host-specific factors. For example, prions show high lymphotropism in scrapie infected sheep and vCJD ... [more ▼]

Prion cell tropism varies significantly among animal species, depending on both the agent strain and host-specific factors. For example, prions show high lymphotropism in scrapie infected sheep and vCJD, but little, if any, in sCJD or BSE. In particular, the BSE strain is associated with significant PrP-res accumulation in tonsils, spleen and appendix in humans, whereas it is largely confined to the nervous system in infected cattle. Therefore, at least in the case of BSE and vCJD, it appears that host properties can influence the accumulation of the infectious agent in lymphoid organs. Mature FDC play an important role in prion pathogenesis, since neuroinvasion following peripheral challenge is significantly impaired in their absence. The proximity between these FDC and sympathetic nerve endings is known to affect the speed of prion neuroinvasion. In this study, we analysed the mucosal innervation and the interface between nerve fibres and FDC in bovine and human tonsils and in ileal and jejunal bovine Peyer’s patches using a panel of antibodies observed by confocal microscopy. Since differences in the innervation of lymphoid organs depending on age have been reported, we analysed three categories of bovine ages (new born calves, calves less than 12 months old and bovines older than 24 months) and two categories of human ages (patients less than 5 years old and patients older than 25 years). In both species, hypothetical ways of innervation by-passing germinal centre could be postulated: nerve fibres are widely distributed in antigens/cells traffic area (the lamina propria, the interfollicular zone, the suprafollicular dome in Peyer’s patches and the lymphoepithelial area in tonsils). We pointed out that, only in ileal and jejunal Peyer’s patches and in tonsils of bovines older than 24 months, nerve fibres are observed to be in contact with FDC. In contrast, in human tonsils, no nerve fibres established contact with FDC, whatever the age. Thus, innervation of germinal centres can be said to be an age-dependent dynamic process in bovines and a weak innervation of the secondary lymphoid organs could thus be a rate-limiting step to neuroinvasion in humans. This variation could influence the way of neuroinvasion and thus, the differences of susceptibility of bovines and humans to the BSE agent. [less ▲]

Detailed reference viewed: 44 (11 ULg)
Full Text
See detailCharacterisation of ionospheric small-scale structures over mid-latitudes in Europe
Warnant, René ULg; Lejeune, Sandrine

in Proceedings of the International Civil Aviation Organization Meeting (2006, October)

Detailed reference viewed: 11 (2 ULg)
Full Text
Peer Reviewed
See detailApproche Récursive d'Etiquetage des Chemins Alternatifs au Niveau IP
Donnet, Benoît ULg; Huffaker, Bradley; Friedman, Timur, et al

in Colloque Francophone d'Ingénierie des Protocoles (2006, October)

Un diamant correspond à l'existence de plusieurs chemins alternatifs entre deux points du réseau. Cette notion joue un rôle important en ingénierie du trafic où il faut, par exemple, répartir la charge de ... [more ▼]

Un diamant correspond à l'existence de plusieurs chemins alternatifs entre deux points du réseau. Cette notion joue un rôle important en ingénierie du trafic où il faut, par exemple, répartir la charge de trafic entre plusieurs chemins. Ces diamants peuvent être présents au niveau SA ou au niveau IP. Cet article s'intéresse au niveau IP et propose une méthode récursive d'étiquetage des diamants, RLPA. Nous avons appliqué RLPA sur un sous-ensemble des données skitter. Nous montrons, sur le sous-ensemble observé, que les diamants sont majoritairement composés d'un seul noeud intermédiaire, qu'ils sont formés de deux chemins alternatifs, qu'ils sont essentiellement symétriques et qu'ils se situent entre 10 et 15 sauts de la source du traceroute. [less ▲]

Detailed reference viewed: 8 (4 ULg)
Full Text
Peer Reviewed
See detailVALIDATION ANALYTIQUE DE LA TROUSSE OCTEIA 25-HYDROXYVITAMINE D (IDS).
Cavalier, Etienne ULg; Levaux, Laetitia ULg; Carlisi, Ignazia ULg et al

in Immuno-Analyse & Biologie Spécialisée [=IBS] (2006, October)

Detailed reference viewed: 72 (14 ULg)
Full Text
See detailPhysicochemical characterization of a dietary fibre concentrate extracted from date pulp.
Roiseux, Olivier; Blecker, Christophe ULg; Besbes, Souhail et al

Poster (2006, October)

Detailed reference viewed: 19 (6 ULg)
Full Text
Peer Reviewed
See detailDownscaling of ECMWF grid meteorological data : comparison with ground stations and validation
Tychon, Bernard ULg; Horion, Stéphanie

Conference (2006, October)

CGMS currently operates on observed station data. Switching from this classical approach to a modelled data from European Centre for Medium-range Weather Forecast, ECMWF, has to be tested before applying ... [more ▼]

CGMS currently operates on observed station data. Switching from this classical approach to a modelled data from European Centre for Medium-range Weather Forecast, ECMWF, has to be tested before applying it operationally. In this study, we concentrated on the impact of the downscaling of meteorological data with grid sizes ranging from 1.875 to 0.35 degrees to the new CGMS grid size of 25 X 25 km. Four different grid sizes corresponding respectively to the dimensions of the Operational, EPS, Monthly and Seasonal ECMWF Models were checked. The control was done on daily data of 25 stations selected on a 2-year period in a window covering the South of Germany and Czech Republic, a large part of Austria and the North of Italia in order to analyse the downscaling impact on plains, mountainous and coastal zones. For each grid size, four different downscaling methods were applied: the reference method that uses the classical CGMS interpolation procedure, the nearest neighbour approach, and two more complicated interpolation techniques using the Model Output Statistics developed by Meteo Consult (MC-MOS). The analysis showed that the accuracy of the downscaling procedure is largely influenced by the input data grid size. RMSE increases between the smallest and the largest grids are respectively 59%, 51%, 33%, and 33% for Tmax, Tmin, Wind Speed and Radiation fields. Rainfall does not seem to be affected by the downscaling process but the RMSE is high in all cases. In most cases, the best interpolation method is also the more complex one and the one that requires more computer time to be calculated. RMSE decrease of 22%, 50%, 57% and 28% respectively for Tmax, Tmin, Wind speed and Radiation fields when we compare the best interpolation method results with the reference approach. An exception in this general rule is for the rainfall rate estimation whose accuracy is not always best with the most complex interpolation technique. [less ▲]

Detailed reference viewed: 45 (2 ULg)
Full Text
Peer Reviewed
See detailMonitoring of the crop water stress in Belgium. The case of the 2003 heat wave.
Horion, Stephanie; Tychon, Bernard ULg; De Longueville, Florence ULg

Conference (2006, October)

In this paper the crop water stress is evaluated with three different indices: (i) the Relative Soil Moisture Index [RSMI] resulting from agrometeorological model simulations, (ii) the Normalized ... [more ▼]

In this paper the crop water stress is evaluated with three different indices: (i) the Relative Soil Moisture Index [RSMI] resulting from agrometeorological model simulations, (ii) the Normalized Difference Vegetation Index, [NDVI] applied on S10 SPOT-VGT imagery, (iii) the Normalized Difference Water Index, [NDWI] applied on S10 SPOT-VGT imagery. [less ▲]

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailThe B-CGMS project : evaluation after 5 years of monitoring and prediction
Curnel, Y.; Oger, Robert ULg; Leteinturier, B. et al

Conference (2006, October)

The B-CGMS project, started in 1998, is the adaptation to Belgian Conditions of the European Crop Growth Monitoring System (CGMS). This project involved 3 Belgian scientific institutes: the Walloon ... [more ▼]

The B-CGMS project, started in 1998, is the adaptation to Belgian Conditions of the European Crop Growth Monitoring System (CGMS). This project involved 3 Belgian scientific institutes: the Walloon agricultural research Centre (CRA-W), the Flemish Institute for Technological Research (VITO) and the University of Liège (ULg). The main difference with the European system is that more detailed inputs (meteorological, soil and NUTS inputs) are used. Crop yields predictions are realised on a monthly basis during the growing season (from April to September) for 6 crops (winter wheat, winter barley, maize, Potato, sugar beet, winter rapeseed). Yields predictions as well as analyses of meteorological situation of the month and RS information on the state of the crops are published in agrometeorological bulletins sent by e-mail since 2002. The information is also available on the Internet website of the project (http://.b-cgms.cra.wallonie.be). Crop yields predictions are produced through a combination of linear regression models which may include different categories of yield indicators (trend, meteo, RS and agrometeorological model outputs). Crop yields predictions procedure is currently semi-automated by the use of a statistical calibration toolbox (StatCaT). The evaluation of the project after 5 years of monitoring and prediction has first shown that final yields predicted B-CGMS as well as the ones predicted by MARS are coherent compared with official yields: no significant differences are observed. As far as the accuracy according to the month for which the prediction is made is concerned, we can notice that at agricultural circumscriptions level and for winter crops a lower precision of B-CGMS is observed before June and that there is no improvement in July (in comparison with June). The same evolution is observed for summer crops before July but in August and September, the prediction accuracy decreases. Even if calibration models present high adjusted coefficient of determination, the technological trend explains an important part of the variability and it is therefore necessary to consider the effect of a year factor on the quality of prediction in order to clearly the interest of the agrometeorological model. For some crops (as potato), adding agrometeorological yield outputs to models including already the technological trend allow to improve the quality of prediction especially for “extreme” year i.e. years where official yields move away significantly from the technological trend. For others crops as winter wheat, this improvement of the quality of prediction is not observed. However, fortunately, adding other yield indicators as meteo indicators can improve in general the quality of prediction and once again especially for “extreme” years. [less ▲]

Detailed reference viewed: 59 (7 ULg)
See detailNumerical and experimental research in river hydrodynamics and hydraulic engineering
Dewals, Benjamin ULg

Conference (2006, September 29)

Detailed reference viewed: 5 (1 ULg)
See detailNew Cold Plasma and DLC Surface Treatments for Medical Co-Cr-Mo and Ti-6Al-4V Prostheses
Matarazzo, Lucas; De Pauw-Gillet, Marie-Claire ULg; Forest, B et al

Poster (2006, September 27)

Recent studies indicate that the most important factor limiting the longevity of hip prostheses is the production of wear particles from the prosthetic components. We have studied the effect of two ... [more ▼]

Recent studies indicate that the most important factor limiting the longevity of hip prostheses is the production of wear particles from the prosthetic components. We have studied the effect of two surface treatment techniques on the Ti-6Al-4V alloy: ionic nitruration (cold plasma) and Diamond-like Coating (DLC). These two techniques create a layer of 7-8 μm in depth on the surface of the alloy, modifying its structure and hardening it considerably. Biocompatibility was analyzed using cellular culture to compare viability, proliferation (DNA quantification) and differentiation (ALP assay) of human osteoblast-like cells (MG 63) as well as cellular adhesion of human fibroblasts (WI 38) or osteoblasts, under SEM. [less ▲]

Detailed reference viewed: 37 (3 ULg)
Full Text
See detailConstruction d’un modèle du récepteur sérotoninergique 5HT2c
Dilly, Sébastien ULg; Farce, Amaury; Yous, Said et al

Poster (2006, September 27)

La 5-hydroxytryptamine, plus couramment appelée sérotonine, a été découverte indépendamment en 1937 dans le tractus gastro-intestinal, et en 1948 dans le sérum, puis trouvée également dans le cerveau en ... [more ▼]

La 5-hydroxytryptamine, plus couramment appelée sérotonine, a été découverte indépendamment en 1937 dans le tractus gastro-intestinal, et en 1948 dans le sérum, puis trouvée également dans le cerveau en 1953. Sa structure a pour sa part été déterminée en 1949. Cette découverte a été initialement basée sur ses propriétés contractantes sur les muscles lisses. Le système sérotoninergique est cependant beaucoup plus important que ces premières investigations ne le laissaient envisager, puisqu’il intervient pratiquement dans toutes les réponses physiologiques, tant au niveau périphérique, où la sérotonine est impliquée dans l’hypertension, l’asthme ou l’acidité gastrique, qu’au niveau central, où elle joue un rôle majeur dans la régulation de l’humeur. Cette capacité lui donne une grande importance dans le traitement des dépressions. C’est dans ce cadre que se placent nos travaux, portant plus particulièrement sur une nouvelle classe thérapeutique dont le chef de file est l’agomélatine. Cette dernière agit selon un mode d’action original en se fixant à la fois aux récepteurs mélatoninergiques et au récepteur sérotoninergique 5HT2c, ce qui a donné naissance au concept MASSA (Melatonin Agonist and Selective Serotonin Antagonist). Comme la plupart des récepteurs sérotoninergiques, le sous-type 5HT2c est un Récepteur à sept domaines transmembranaires Couplé à une Protéine G (RCPG). La structure tridimensionnelle de 5HT2c n’est pas connue expérimentalement, et nous avons donc fait appel à la modélisation par homologie comparative pour construire un modèle nous permettant d’étudier ses interactions avec l’agomélatine. [less ▲]

Detailed reference viewed: 56 (5 ULg)
Full Text
See detailBiocompatibilidad de nuevos policationes sintéticos sobre las propiedades mecánicas y morfológicas de la membrana eritrocitaria
Relancio, M; Delannoy, M; Foresto, P et al

Poster (2006, September 25)

Detailed reference viewed: 22 (0 ULg)
Full Text
Peer Reviewed
See detailFeasibility study of the modernization of Wielingen class frigates
Marchal, Jean ULg; Hage, André ULg; Dessart, Christophe et al

(2006, September 25)

The research group MRN04 has made a study of modernization of frigates of the Belgian Navy. The modernization includes fitting out of a landing area for an 11 tonnes helicopter, modifying the ... [more ▼]

The research group MRN04 has made a study of modernization of frigates of the Belgian Navy. The modernization includes fitting out of a landing area for an 11 tonnes helicopter, modifying the superstructure to solve the problems of cracks and reducing the radar cross section. The proposal of the group MRN04 consists of widening and stiffness the stern deck in order to permit landing of a helicopter, surrounding the existing superstructure by a new envelop having a better furtivity. The resistance of the helicopter landing area and the rigidity of the superstructure has been estimated by structural computations by finite elements method, which permits to choose the most adequate structure. Once the weight of the new elements is known, a new estimation of the weight is established. It permits to calculate the draft and the trim, and serves as the data to calculate the ship resistance. In fact, the speed of the frigate, as a crucial point, should not decrease too much. The ship resistance will be obtained by means of model tests in the towing tank in the University of Liège. The study shows the possibility to lay out a landing area for a helicopter of 11 tonnes as well as to decrease significantly the radar cross section, without severe reduction of the frigate speed. [less ▲]

Detailed reference viewed: 132 (7 ULg)
Full Text
See detailEvaluación mediante métodos ópticos de la funcionalidad de policationes sintéticos para el enmascaramiento de sitios antigénicos en el eritrocito humano
Relancio, M.F; Riquelme, B; Dumas, D et al

Poster (2006, September 25)

Detailed reference viewed: 12 (0 ULg)
See detailMacromolecular engineering of cyclic aliphatic polyesters by ring-opening polymerization
Lecomte, Philippe ULg; Riva, Raphaël ULg; Li, Haiying et al

Conference (2006, September 24)

Detailed reference viewed: 8 (3 ULg)
Full Text
Peer Reviewed
See detailRecent investigations on the behaviour of buildings after the loss of a column
Demonceau, Jean-François ULg; Luu, Nguyen Nam Hai ULg; Jaspart, Jean-Pierre ULg

in Dubina, Dan; Ungureanu, Viorel (Eds.) Steel: a new and traditional material for building (2006, September 20)

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. According to Eurocodes and some ... [more ▼]

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. According to Eurocodes and some different other national design codes, the structural integrity of civil engineering structures should be ensured through appropriate measures but, in most of the cases, no precise practical guidelines on how to achieve this goal are provided. An European RFCS project entitled “Robust structures by joint ductility” has been set up in 2004, for three years, with the aim to provide requirements and practical guidelines allowing to ensure the structural integrity of steel and composite structures under exceptional events through an appropriate robustness. In particular, one substructure test simulating the loss of a column in a composite building will be performed at Liège University. The present paper described first analytical and numerical studies carried out at Liège University as part of this European project. [less ▲]

Detailed reference viewed: 65 (16 ULg)
See detailUrban regeneration: a North-West Europe perspective
Halleux, Jean-Marie ULg

Conference (2006, September 19)

Detailed reference viewed: 7 (1 ULg)
Full Text
Peer Reviewed
See detailPOTENTIAL OF WATER RESOURCES OF PURSAT BASIN FOR IRRIGATION DEVELOPMENT
Ly, Sarann ULg; Someth, Paradis; Seng, Bunrith et al

in Tanji, Hajime (Ed.) Proceedings of the Second International Symposium on Sustainable Development in the Mekong River Basin (2006, September 18)

Pursat River, one of the tributaries, flows into the Great Lake Tonle Sap, located in Pursat province, 187 km from Phnom Penh. Pursat River originates in Kbal Kmaoch Mountain at an elevation of 1,425m ... [more ▼]

Pursat River, one of the tributaries, flows into the Great Lake Tonle Sap, located in Pursat province, 187 km from Phnom Penh. Pursat River originates in Kbal Kmaoch Mountain at an elevation of 1,425m. The main stream joins with Prey Khlong River and Arai River which originate in Orall Mountain at the elevation of 1,813m, the highest mountain in Cambodia. Large of paddy field in the province is irrigated by the river. The lack of year round management of irrigation system along the river is a serious constraint to social and economic development, and poverty reduction in the province. The objective of the research is to discover the appropriate way to develop the irrigation system along the river. The study attempts to uncover the historical development of the river and water use along the river. The research also reveals the appropriate way to put the right system to the right place. The analysis will review the estimation of river flow and total annual flow, an amount of water to be withdrawn from the river, which will be simulated based on meteorological and hydrologic data, and field investigation. [less ▲]

Detailed reference viewed: 40 (4 ULg)
Peer Reviewed
See detailDEVELOPMENT OF SHALLOW RESERVOIR IRRIGATION BY USING FLOODWATER FOR PADDY RICE CULTIVATION
Someth, Paradis; Kubo, N.; Ly, Sarann ULg et al

in Tanji, Hajime (Ed.) Proceedings of the Second International Symposium on Sustainable Development in the Mekong River Basin (2006, September 18)

The Tonle Sap Great Lake and the Mekong River in Cambodia have huge floodplain suitable for rice-based farming system and potential water resources for farming. Studies to exploit the flood and the water ... [more ▼]

The Tonle Sap Great Lake and the Mekong River in Cambodia have huge floodplain suitable for rice-based farming system and potential water resources for farming. Studies to exploit the flood and the water resources of the lake and the river have not been well conducted yet. Batheay irrigation system is located in the floodplain of the Tonle Sap River and the Mekong River. In this research, the irrigation system is studied as a model site for future development of the floodplain of the Tonle Sap Great Lake and the Mekong River. Batheay reservoir directly receives floodwater from the Mekong. It functions as both a reservoir and a paddy field. In wet season, dike around the Batheay reservoir prevents floodwater from entering the reservoir. Rainy season rice is grown inside the reservoir. After harvesting, gates around the reservoir are opened to receive floodwater. The water is stored for cultivating dry season rice outside the reservoir. In this work, we attempt to study water management of the Batheay irrigation system by analyzing water use pattern in the irrigation system and uncover effectiveness of the system. This study plays a vital role in the study of the Tonle Sap Great Lake system in our future research. [less ▲]

Detailed reference viewed: 215 (3 ULg)
Peer Reviewed
See detailUtilization of lupin seed as the main protein source in broiler chicken feeding : influence of the variety and interest of protease addition
Froidmont, Eric; Beckers, Yves ULg; Dehareng, Frédéric et al

Poster (2006, September 18)

Detailed reference viewed: 5 (1 ULg)
Peer Reviewed
See detailMeasuring and comparing the equity of educational systems in Europe
Baye, Ariane ULg; Demeuse, Marc

Conference (2006, September 15)

Detailed reference viewed: 12 (0 ULg)
See detailCorps à corps. Détournement et recyclage : Cinéma, art contemporain
Thonon, Jonathan ULg

Conference (2006, September 15)

Detailed reference viewed: 34 (1 ULg)
Peer Reviewed
See detailRisk factors associated with atypical myopathy in grazing horses
Votion, Dominique ULg; Linden, Annick ULg; Thiry, Etienne ULg et al

in In Proceedings of the 45th Annual Congress of the British Equine Veterinary Association (2006, September 14)

Detailed reference viewed: 40 (11 ULg)
Peer Reviewed
See detailTetanus in the horse: a review of 31 cases
Van Galen, Gaby ULg; Delguste, Catherine ULg; Sandersen, Charlotte ULg et al

in Proceedings of the 45th Annual Congress of the British Equine Veterinary Association (2006, September 14)

Detailed reference viewed: 56 (19 ULg)
See detailFormation de radicaux anions d'ADN par irradiation laser UV et visible et nouveaux canaux de dissociation
Gabelica, Valérie ULg; Tabarin, Thibault; Kinet, Catherine ULg et al

Conference (2006, September 13)

Nous avons exploré récemment les effets de l'irradiation laser dans l'UV ou le visible de polyanions d'ADN dans un piège à ions quadripolaire. Lors de l'irradiation de simple brins ou de double hélices d ... [more ▼]

Nous avons exploré récemment les effets de l'irradiation laser dans l'UV ou le visible de polyanions d'ADN dans un piège à ions quadripolaire. Lors de l'irradiation de simple brins ou de double hélices d'ADN en UV autour de 260 nm, nous avons observé un détachement d'électrons, donnant lieu à des radicaux anions. L'étude de la dépendence de l'efficacité de ce photodétachement d'électrons en fonction de la séquence des brins a révélé que ce phénomène était corrélé au potentiel d'ionisation des bases nucléiques. La guanine est la base la plus facilement oxydée, suivie de l'adénine, de la cytosine et de la thymine. En pratique, plus un brin contient de guanines, plus la formation de radicaux par photodétachement d'électrons est efficace. L'efficacité du photodétachement montre également une dépendence envers l'état de charge du brin (les plus chargés ont une efficacité de détachement plus élevée) et en fonction de la longueur d'onde (avec un maximum d'efficacité autour de 265 nm), montrant que la transition vers un état électronique excité des bases facilite le détachement d'électrons. Plus surprenant encore, des complexes avec des chromophores (ligands du sillon de l'ADN et intercalants) montrent également un photodétachement d'électrons, et ce avec des énergies de photons encore plus basses, correspondant à une absorption dans le visible (i.e. 550 nm pour l'éthidium). Ceci montre que les énergies de liaisons des électrons sont relativement faibles, puisqu'ils peuvent être détachés par des photons de 2.25 eV. Nous avons également étudié la fragmentation des radiaux ainsi produits, par CID dans le piège. Dans le cas des complexes avec les chromophores, les canaux de fragmentation principaux sont des pertes de neutres, y compris des morceaux de ligands. Il est intéressant de constater que les radicaux se fragmentent de la même manière, quel que soit le chromophore irradié qui a donné lieu à sa formation. Cecis suggère que les radicaux se réorganisent rapidement par rapport au temps de l'expérience. Dans le cas de simples brins (12-mères à 20-mères), nous avons constaté une fragmentation plus efficace des radicaux comparés aux ions à couches complètes de même charge. Plus intéressant, les canaux de dissociation sont très particuliers : alors que la CID sur ions à couches complètes donne majoritairement des ions 'w' et 'a-Base', la CID sur les radicaux donne des ions 'w', 'd', 'a radicalaires', et 'z radicalaires'. Il est aisé d'obtenir une bonne couverture de séquence à des énergies de collision faibles. A nouveau, bien que le détachement d'électrons soit initié par les bases guanines, la couverture de séquence est indépendante de la composition, suggérant une redistribution dans les radicaux. L'avantage principal de la fragmentation des radicaux est l'absence de fragments internes (ou 'double fragments'), ce qui facilite le séquencage de novo. De plus, selon notre expérience, la formation des radicaux est plus aisée par irradiation laser que par EDD. [less ▲]

Detailed reference viewed: 30 (0 ULg)
Peer Reviewed
See detailLe rôle des pays de l’Est dans l’Europe à venir
Gyemant, Maria ULg

Conference (2006, September 13)

Detailed reference viewed: 4 (2 ULg)
Peer Reviewed
See detailL’impact des tests traduits sur les performances des élèves
Baye, Ariane ULg

Conference (2006, September 12)

Detailed reference viewed: 1 (0 ULg)
See detailPrévention des infections périnatales à streptocoques du groupe B : Recommandations
MELIN, Pierrette ULg

Conference (2006, September 08)

Detailed reference viewed: 12 (5 ULg)
Full Text
See detailLe froment d'hiver
Herman, Jean-Luc; Vancutsem, Françoise ULg; Couvreur, Luc et al

in Céréales Gembloux - Informations avant les semis (2006, September 07)

Detailed reference viewed: 16 (2 ULg)
Peer Reviewed
See detailIgE controlling loci in Czech atopic patients.
Gusareva, Elena ULg; Havelková, Helena; Blažková, Hanna et al

Poster (2006, September 07)

Detailed reference viewed: 12 (3 ULg)
Peer Reviewed
See detailThe photosynthetic electron transport network: occurrence and function of cyclic and side pathways
Franck, Fabrice ULg

Conference (2006, September 07)

The current knowledge on cyclic and side pathways of the thylakoidal electron transport system will be discussed. Cyclic or pseudo-cyclic pathways include the PSI-driven cyclic electron transport, the ... [more ▼]

The current knowledge on cyclic and side pathways of the thylakoidal electron transport system will be discussed. Cyclic or pseudo-cyclic pathways include the PSI-driven cyclic electron transport, the cytochrome b6/f plastoquinone cycle and the oxygen-dependent water/water cycle. Side pathways altogether make up the chlororespiratory pathway, including the non-photochemical, NAD(P)H-dependent plastoquinone reduction by chloroplastic dehydrogenases and plastoquinol oxidation by a putative chloroplastic oxidase. The state of knowledge concerning the components, the importance and function of these pathways will be discussed. Results obtained in Liège using the unicellular green alga Chlamydomonas reinhardtii or higher plant chloroplasts will be presented. The importance of specific pathways in the context of mitochondria-chloroplast metabolic interactions and global cellular bio-energetics will be highlighted. Some of the methodological aspects in this field will be shortly described, in particular the use of fluorescence and absorbance spectroscopy. In some micro-algae, the electron transport chain can also use protons as terminal electron acceptors under anaerobic conditions, thereby allowing hydrogen evolution in the light. The potential of this fascinating reaction in perspective of the photobiological production of ‘bio-hydrogen’ will be briefly discussed. [less ▲]

Detailed reference viewed: 17 (1 ULg)
Full Text
See detailEscourgeon et Orge d'hiver fourragers
Monfort, Bruno; Herman, Jean-Luc; Couvreur, Luc et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2006, September 07)

Detailed reference viewed: 10 (0 ULg)
Full Text
See detailLa qualité des froments d'hiver en 2006?
Sinnaeve, Georges; Lenartz, Jonathan; Vancutsem, Françoise ULg et al

in Céréales Gembloux - Informations avant les semis (2006, September 07)

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailLe rapport à la langue/aux langues dans les dialectes de Wallonie
Baiwir, Esther ULg

Conference (2006, September 05)

Detailed reference viewed: 16 (0 ULg)
Peer Reviewed
See detailNew functional polyvinylacetate and polyvinylalcohol architectures
Detrembleur, Christophe ULg

Conference (2006, September 04)

Detailed reference viewed: 5 (0 ULg)
Full Text
See detailEffects of synthetic polycations on erythrocyte membrane analyzed by optical methods
Relancio, F; Riquelme, B; Dumas, D et al

Poster (2006, September 02)

Detailed reference viewed: 6 (1 ULg)
See detailAngular Clustering of Obscured Active Galactic Nuclei
Gandhi, Poshak; Garcet, O.; Disseau, L. et al

in Bulletin of the American Astronomical Society, Vol. 38 (2006, September 01)

We describe the properties of X-ray point-like sources detected over 4.2 sq. degs. of the largest contiguous survey with XMM-Newton to date (the XMM-LSS survey) to fluxes of F[SUB]2-10 keV[/SUB] 8x10[SUP ... [more ▼]

We describe the properties of X-ray point-like sources detected over 4.2 sq. degs. of the largest contiguous survey with XMM-Newton to date (the XMM-LSS survey) to fluxes of F[SUB]2-10 keV[/SUB] 8x10[SUP]-15[/SUP] erg/s/cm[SUP]2[/SUP] and F[SUB]0.5-2 keV[/SUB] 2x10[SUP]-15[/SUP] erg/s/cm[SUP]2[/SUP] respectively. For 1200 sources in the soft band, we find a two-point angular correlation function (ACF) signal similar to previous work, but no correlation for 400 sources in the hard band. A sample of 200 faint sources with hard X-ray spectra does show a 2-3 sigma positive signal with a power-law normalization theta[SUB]0[/SUB]>40 arcsec. We discuss implications, including the fact that a large correlation length for obscured AGN is inconsistent with simple AGN Unification based on orientation only. [less ▲]

Detailed reference viewed: 17 (2 ULg)
Peer Reviewed
See detailIdentities and change in public administrations: which interaction over time?
Rondeaux, Giseline ULg

Conference (2006, September)

In the name of their modernization, public administrations are confronted to series of change processes, under varied forms and addressed to several aspects of the administration. One can reasonably ... [more ▼]

In the name of their modernization, public administrations are confronted to series of change processes, under varied forms and addressed to several aspects of the administration. One can reasonably suppose that these upheavals cause effects on civil servants, on their relation to the organisation and on the way they see it. Within such a large question, our preoccupation is to question the existence of links between a major planned change within an administration (such as a NPM reform) and its organizational identities. Three hypotheses can be tested: • the impact: public reforms involve transformation of identities; • the independence: identities persist whatever the reforms may be; • and finally the co-structuring: reforms modify partly identities, but these ones shape also the reforms process. The position we adopt in this paper tends to be inscribed in this third hypothesis: we assume indeed that the introduction of a NPM reform leads to a hybridization of identity logics within public administration, but in other respects the reform process can be eventually influenced by the identity logics. We illustrate this assumption with empirical data collected in a Belgian Ministry. According to a first qualitative analysis we distinguished 6 identity profiles, characterised by their reference to either one or the other identity logic (public service or public managerialism) and their adopted positioning (fidelity or reality) (see EGPA 2005). 12 to 18 months later, we conducted a second set of interviews with the same sample of people we met before. This leads us to give these first results a longitudinal dimension and to propose an analysis of identity dynamics in a temporal perspective. We thus explain how identity profiles evolve over time. A concomitant analysis of the administration context and the identity changes allow us to reveal the links between identities and the continuous change context in which they are inscribed. Furthermore, we also proceed to the statistical exploitation of questionnaires sent to the whole Ministry personnel, in order to broadening our empirical basis. Doing this, we attempt to estimate the relative importance of the identity profiles as they are represented within this organization. Through our case study, our hypothesis of organizational identities and reform process co-structuring appears as valid, as shows the hybridization of identity logics within the administration we studied. Our results allow us to assume a modification of identity points of reference following a reform, as well as a reinterpretation of this reform through the identity filter. Our longitudinal approach reveals the identity dynamics constructed over time, by identifying notably the shift processes from one position to another. [less ▲]

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailLa qualité de vie de sujets âgés déments, MCI et vulnérables : évaluations transversale et longitudinale
Missotten, Pierre ULg; Ylieff, Michel ULg; Schuerch, Michael et al

Conference (2006, September)

Detailed reference viewed: 45 (2 ULg)
Full Text
Peer Reviewed
See detailImprovement of autobiographical memory in schizophrenia patients
Blairy, Sylvie ULg; Neumann, Aurore; Pierret, Leslie et al

Poster (2006, September)

Detailed reference viewed: 46 (7 ULg)
Full Text
See detailAn experimental investigation of the subsonic stall flutter
Li, Jing; Andrinopoulos, Nikolaos; Dimitriadis, Grigorios ULg

in Proceedings of the 2006 International Conference on Noise and Vibration Engineering (2006, September)

This paper reports on experimental investigations of the subsonic stall flutter of a wing in a wind tunnel. Stall flutter (also know as Dynamic Stall) is a LCO phenomenon occurring when all or part of the ... [more ▼]

This paper reports on experimental investigations of the subsonic stall flutter of a wing in a wind tunnel. Stall flutter (also know as Dynamic Stall) is a LCO phenomenon occurring when all or part of the flow over a wing separates and re-attaches at least once during a full oscillation period. In order to investigate the aeroelastic effects of the nonlinearity introduced by the boundary layer growth and flow separation and the ensuing stall-induced LCO, a wind tunnel model of a wing undergoing stall flutter is designed, built and tested. The model is a rectangular wing with constant cross-section free to move in the pitch and plunge directions, restrained by torsional and linear springs respectively. The motion of the wing is measured using laser displacement probes. Two types of stall flutter are observed and measured: 1. Non-symmetric stall flutter, where the flow separates over one side of the wing only, and 2. Symmetric stall flutter, where the flow separates over both sides of the wing (deep stall). The bifurcation behaviour of the wing is very complex and both types of LCO can be observed during a single response history. [less ▲]

Detailed reference viewed: 88 (11 ULg)
Peer Reviewed
See detailSchool fish behaviour
Becco, Christophe ULg; Vandewalle, Nicolas ULg; Delcourt, Johann ULg et al

Conference (2006, September)

Detailed reference viewed: 61 (7 ULg)
Peer Reviewed
See detailFonctionnement inhibiteur dans le vieillissement normal et pathologique
Collette, Fabienne ULg

Conference (2006, September)

Detailed reference viewed: 4 (1 ULg)
Full Text
Peer Reviewed
See detailLe NPI NH chez des sujets âgés déments et non déments
Ylieff, Michel ULg; Di Notte, David; Missotten, Pierre ULg et al

Poster (2006, September)

Detailed reference viewed: 52 (0 ULg)
See detailSelection of bacteriocin-producing lactic acid bacteria from Senegalese traditional fermented food for use as bio-preservative in fish
Diop, M.; Dortu, C.; Ngom, A. et al

Poster (2006, September)

Detailed reference viewed: 4 (0 ULg)
See detailSchermatura dei protoni relativistici
Durante, M.; Bertucci, A.; Gialanella, G. et al

(2006, September)

Detailed reference viewed: 13 (2 ULg)
Peer Reviewed
See detailLow-cost fabrication of valveless micropumps
Haas, C; Kraft, Michael ULg

in Proceedings of "MME 2006 Conference, UK Septembre 2006" (2006, September)

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailCharacterisation of stability behaviour of ultra fine alumina powder in view its colloidal processing by gel-casting
Gaydardzhiev, Stoyan ULg; Ay, P.

in Onal G. et al. (Ed.) Proceedings of XXIII International Mineral Processing Congress, 3-8 September 2006, Istanbul (2006, September)

The paper reports on results study aimed at assessing of the influence of dispersant type on the electrochemical properties of highly concentrated alumina suspension. The relationship between the type of ... [more ▼]

The paper reports on results study aimed at assessing of the influence of dispersant type on the electrochemical properties of highly concentrated alumina suspension. The relationship between the type of dispersant and the stabilization ability towards ultrafine alumina powder CT3000 has been studied. The effectiveness was determined mainly by the zeta potential value, specific surface charge, the shift in the pH(iep) and by visual controlling the fluidity of the slurry at constant solid loading. A good agreement between the zeta potential and the specific surface charge as a way to determine the optimal dose of dispersant has been documented. Gel-casting experiments showed that the Dolapix CE64, an ammonium polyacrylate dispersant was the best dispersant for the studied powder. [less ▲]

Detailed reference viewed: 76 (7 ULg)
Full Text
Peer Reviewed
See detailScreening for metabolic abnormalities in patients with schizophrenia treated with antipsychotics: are we doing enough?
Van Winkel, R.; De Hert, M.; Van Eyck, D. et al

in European Neuropsychopharmacology (2006, September), 16(Suppl. 4), 398

Detailed reference viewed: 12 (4 ULg)
See detailInterferogram Stitching applied to the surface metrology of millimeter–wave and micrometer-wave reflectors
Roose, Stéphane ULg

in Slangen, Pierre; Cerruti, Christine (Eds.) Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers (2006, September)

This paper addresses the interferometric measurements performed on PLANCK Secondary reflector-Flight Model (SRFM) during the cryo-optical test at the Centre Spatial de Liege in Belgium. It was requested ... [more ▼]

This paper addresses the interferometric measurements performed on PLANCK Secondary reflector-Flight Model (SRFM) during the cryo-optical test at the Centre Spatial de Liege in Belgium. It was requested to measure the changes of the surface figure error (SFE) with respect to the best ellipsoid, between 293 K and 50 K, with a 1 μm RMS accuracy. To achieve this, Infra Red interferometry has been selected and a dedicated thermo mechanical set-up has been constructed. One emphasizes on the solutions adopted to cope with high surface slopes appearing at cryogenic temperature. Indeed, detector resolution has been exploited to resolve high density fringes at the expense of the aperture. A stitching procedure has been implemented to reconstruct the full aperture measurement with success. Test results are presented. [less ▲]

Detailed reference viewed: 14 (4 ULg)
Peer Reviewed
See detailLow-cost fabrication of valveless micropumps
Haas, C; Kraft, Michael ULg

in Proceedings of "MME 2006 Conference, UK Septembre 2006" (2006, September)

Detailed reference viewed: 14 (0 ULg)
Full Text
Peer Reviewed
See detailDual analysis for finite element solutions of plate bending
Debongnie, Jean-François ULg; Nguyen-Xuan, Hung; Cung, N. H.

in Topping, B. H. V.; Montero, G.; Montenegro, R. (Eds.) Proceedings of the Eighth International Conference on Computational Structures Technology (2006, September)

This paper presents the application of the dual analysis concept to plate bending. In this method, a same problem is analyzed parallely by a displacement and an equilibrium model. The energetic distance ... [more ▼]

This paper presents the application of the dual analysis concept to plate bending. In this method, a same problem is analyzed parallely by a displacement and an equilibrium model. The energetic distance between these two models is the sum of both global errors and consequently, an upper bound of each of them. After an exposition of the two models, numerical examples are presented, which illustrate the high obtainable accuracy of the method. [less ▲]

Detailed reference viewed: 56 (9 ULg)
Full Text
Peer Reviewed
See detailEVALUER AUTREMENT LA CAPACITE D’ANALYSER SA PRATIQUE D’ENSEIGNANT AU SECONDAIRE SUPERIEUR SOUS L’ANGLE DE LA PSYCHOLOGIE EDUCATIONNELLE
Delcomminette, Séverine ULg; Leclercq, Dieudonné ULg; Sente, Isabelle

in Actes du 19ème colloque de l’Association pour le Développement des Méthodologies d'Evaluation en Education (2006, September)

Le cours de psychologie éducationnelle à l’agrégation dispensé au sein de l’Université de Liège s’adresse à des futurs enseignants du secondaire supérieur. En novembre 2006, nous avons renversé notre ... [more ▼]

Le cours de psychologie éducationnelle à l’agrégation dispensé au sein de l’Université de Liège s’adresse à des futurs enseignants du secondaire supérieur. En novembre 2006, nous avons renversé notre processus traditionnel d’évaluation certificative pratiqué depuis 20 ans. Au lieu d’inviter les étudiants à répondre à des questions à choix multiple (QCM) sur des cas créés par nous sur base de nos seules représentations personnelles de la vie en classe, nous leur avons demandé de fournir des exemples dans leur domaine (chimie, langues germaniques, sciences sanitaires, … ; 20 domaines au total). Ce renversement de la perspective est comparable au passage du thème (traduire vers la langue étrangère) à la version (traduire vers sa langue). Dans cet article nous analysons l’aspect docimologique, formatif ainsi que l’intérêt perçu par les étudiants et par les encadrants de cette nouvelle formule d’évaluation. [less ▲]

Detailed reference viewed: 163 (9 ULg)