References of "Scientific congresses and symposiums"
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See detailTowards positional identification of susceptibility loci for White Heifer disease in Belgian Blue Cattle (poster)
Sartelet, Arnaud ULiege; Druet, Tom ULiege; Coppieters, Wouter ULiege et al

in New Biotechnology (2010, April), 27(Supplement 1), 79

Detailed reference viewed: 91 (18 ULiège)
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See detailAtopy controlling loci in Czech and Russian populations
Gusareva, Elena ULiege; Badalová, Jana; Havelková, Helena et al

Poster (2010, April)

Detailed reference viewed: 11 (2 ULiège)
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See detailMeasurement and comparison of elderly welfare in the EU
Lefebvre, Mathieu ULiege

Conference (2010, April)

Detailed reference viewed: 22 (1 ULiège)
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See detailDirectional and Nondirectional Risk Exposures in Hedge Fund Returns
Lambert, Marie ULiege; Hübner, Georges ULiege; Papageorgiou, Nicolas

Conference (2010, April)

Detailed reference viewed: 22 (1 ULiège)
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See detailHydrological modelling of the EU Nitrates Directive Actions Programme: new developments in the Walloon Region (Belgium)
Sohier, Catherine ULiege; Dautrebande, Sylvia; Degre, Aurore ULiege

Poster (2010, April)

Wallonia (Southern Region of Belgium) implemented the Nitrates Directive through a first actions plan in 2002 followed by a second action plan in 2007. It designated vulnerable zones and introduced ... [more ▼]

Wallonia (Southern Region of Belgium) implemented the Nitrates Directive through a first actions plan in 2002 followed by a second action plan in 2007. It designated vulnerable zones and introduced various mandatory practices in order to reduce the nitrate contamination risk. At the same time, the government decided to fund non mandatory practices focused on agro-environment. Some of these (like buffer strips) should also be useful in nutrient mitigation. In order to assess the global effectiveness of all the mitigation practices, we have been developing a hydrological model spatially distributed using a 1km² grid cell on the whole Region (16 900 km²). The EPICgrid model represents the root zone and the vadose zone. In Wallonia, groundwater tables are more than 30 m deep in 8% of the territory. It is therefore of major importance to fill the gap between the root zone and the groundwater bodies. It allows us to assess the nitrate transfer time and forecast the mitigation measures’ effect in time, space and amplitude. On the ground, runoff and sediment yield are modelled at the small watershed scale in order to assess buffer strips’ effect on sediment deposition and its consequences on N and P mitigation. The poster will explain the more recent results that consist in forecasting action plans’ effect until 2015 (on both surface water bodies and groundwater bodies) and modelling of the current buffer strips’ effect. [less ▲]

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See detailEffet de la modalité visuelle sur le jugement de la réverbération d’une salle
Billon, Alexis ULiege; Safin, Stéphane ULiege; Defays, Aurore ULiege et al

Conference (2010, April)

Le projet Auralias vise à développer un environnement immersif permettant le travail coopératif entre architectes et acousticiens. Le système développé associe donc un rendu sonore 3D (au moyen d’un ... [more ▼]

Le projet Auralias vise à développer un environnement immersif permettant le travail coopératif entre architectes et acousticiens. Le système développé associe donc un rendu sonore 3D (au moyen d’un dispositif VBAP) et une vue du modèle 3D de la salle considérée. Dans ce cadre, nous nous intéressons à l’impact de l’image projetée sur le jugement subjectif de l’acoustique de la salle. Ici, le critère objectif étudié est le temps de réverbération. Pour cela, des réponses impulsionnelles synthétiques possédant la même partie précoce (jusqu’à 80 ms) et différentes parties tardives ont été obtenues puis convoluées avec des rythmes de percussions pour obtenir différents échantillons sonores. Après un prétest permettant de définir une série d’images de salles évoquant des réverbérations différentes, un test subjectif en deux parties a été mené sur deux populations différentes. La tâche demandée est à chaque fois un classement des échantillons sonores dans l’ordre de réverbération croissante. Après une situation de contrôle (test réalisé sans l’appui des images), le sujet est soumis à un des trois scénarios suivants : images incitatrices (l’échantillon possédant le plus de réverbération est associé à l’image évoquant le plus long temps de réverbération), images distractrices (l’image soutenant l’échantillon sonore est tirée aléatoirement) et de sans image (testant ainsi l’effet d’apprentissage). Les résultats de cette expérience sont détaillés et permettent des premières prescriptions quant aux images à afficher dans l'environnement immersif pour soutenir la tâche de jugement acoustique. [less ▲]

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See detailRevisiting the taxonomy of the Rattini tribe: a phylogeny-based delimitation of species boundaries
Pagès, Marie ULiege; Chaval, Yannick; Herbreteau, Vincent et al

Conference (2010, April)

Rodents are recognized as hosts for at least 60 zoonotic diseases and may represent a serious threat for human health. In the context of global environmental changes and increasing mobility of humans and ... [more ▼]

Rodents are recognized as hosts for at least 60 zoonotic diseases and may represent a serious threat for human health. In the context of global environmental changes and increasing mobility of humans and animals, contacts between pathogens and potential animal hosts and vectors are modified, amplifying the risk of disease emergence. An accurate identification of each rodent at a specific level is needed in order to understand their implications in the transmission of diseases. Among the Muridae, the Rattini tribe encompasses 167 species inhabiting South East Asia, a hotspot of both biodiversity and emerging and re-emerging diseases. The region faces growing economical development that affects habitats, biodiversity and health. Rat species have been demonstrated as significant hosts of pathogens but are still difficult to recognize at a specific level using morphological criteria. DNA-barcoding methods appear as accurate tools for rat species identification but their use is hampered by the need of reliable identification of reference specimens. In this study, we explore and highlight the limits of the current taxonomy of the Rattini tribe. We used the DNA sequence information itself as the primary information source to establish group membership and estimate putative species boundaries. We sequenced two mitochondrial and one nuclear genes from 122 rat samples to perform phylogenetic reconstructions. The method of Pons and colleagues (2006) that determines, with no prior expectations, the locations of ancestral nodes defining putative species was then applied to our dataset. To give an appropriate name to each cluster recognized as a putative species, we reviewed information from the literature and obtained sequences from a museum holotype specimen following the ancient DNA criteria. [less ▲]

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See detail3D and 2D particle image analysis of rock chips generated by core scratch tests.
Pirard, Eric ULiege; Limam, Sami; Califice, Arnaud ULiege et al

in World Congress on Particle Technology (2010, April)

Detailed reference viewed: 143 (10 ULiège)
See detailEvaluation de la distribution d’abondance des plantes vasculaires au Parc National de la Ruvubu, Burundi.
Masharabu, T; Noret, N; Lejoly, J et al

Poster (2010, April)

Detailed reference viewed: 26 (2 ULiège)
Peer Reviewed
See detailComparative studies for the serodiagnosis of Chlamydophila and Mycoplasma pneumoniae infections
Huynen, Pascale ULiege; Goebel, Marie-Rose ULiege; Meex, Cécile ULiege et al

in ESCMID (Ed.) Abstract book of the 20th ECCMID (2010, April)

Detailed reference viewed: 48 (7 ULiège)
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See detailInfluence of particle flatness and elongation on size distributions obtained from laser diffraction, static and dynamic image analysis.
Califice, Arnaud ULiege; Michel, Frédéric ULiege; Dislaire, Godefroid et al

in World Congress on Particle Technology (2010, April)

Detailed reference viewed: 75 (23 ULiège)
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See detailEvaluation des caractéristiques acoustiques d’une rue à partir de mesures
Billon, Alexis ULiege; Picaut, Judicaël

Conference (2010, April)

Les caractéristiques acoustiques des rues, tels que les coefficients d’absorption et de diffusion des façades et du sol, sont encore mal connues. En particulier, les façades sont constituées de nombreux ... [more ▼]

Les caractéristiques acoustiques des rues, tels que les coefficients d’absorption et de diffusion des façades et du sol, sont encore mal connues. En particulier, les façades sont constituées de nombreux matériaux différents et peuvent présenter des degrés de relief très variés suivant le style architectural rencontré. Dans cette étude, une méthode est proposée pour obtenir les valeurs de ces coefficients à partir de mesures in situ. Dans un premier temps, une loi empirique liant la variation du coefficient de diffusion à une variation d’absorption en termes de distribution spatiale de l’énergie est recherchée à l’aide d’un logiciel de tir de rayons. Cette loi permet alors de transformer un problème à deux variables (absorption, diffusion) en un problème à une seule variable (absorption équivalente) en fixant la valeur du coefficient d’absorption. Pour chaque bande de fréquence considérée, la valeur d’absorption équivalente minimisant l’erreur commise sur la distribution spatiale de l’énergie par rapport aux mesures est recherchée. Cette valeur associée à la loi empirique précédemment obtenue permet de tester différents couples de valeurs absorption/diffusion en termes de temps de réverbération mesurés. Suivant ce processus, le couple minimisant l’erreur à la fois sur la distribution spatiale de l’énergie et le temps de réverbération est obtenu. Dans cette étude, cette méthode est appliquée à une rue de type Haussmannienne. L’erreur commise est alors de l’ordre de la précision des mesures. De plus, les valeurs obtenues mettent en avant que, pour ce type de rue, la diffusion se produisant aux parois ne peut être négligée. [less ▲]

Detailed reference viewed: 57 (1 ULiège)
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See detailConsequences of laparoscopy on liver ischemia during portal triad clamping in a swine model
Nsadi, Berthier; Pire, E.; Gilson, Nathalie ULiege et al

in Acta Chirurgica Belgica (2010, April), 110

Detailed reference viewed: 48 (7 ULiège)
See detailLes carrières professionnelles des cadres : regard croisé du genre et de l'âge
Grodent, Françoise ULiege

Conference (2010, April)

Ce papier a pour objectif de réaliser une revue de littérature qui doit permettre de construire une recherche empirique visant à apporter une vision comparative des carrières des hommes et des femmes ... [more ▼]

Ce papier a pour objectif de réaliser une revue de littérature qui doit permettre de construire une recherche empirique visant à apporter une vision comparative des carrières des hommes et des femmes cadres en regard de trois groupes d’âge : les moins de 35 ans, les [35-50] ans et les plus de 50 ans. Nous considérons les deux sexes étant donné que les trajectoires professionnelles sont influencées par le sexe de la personne ainsi que par les stéréotypes et les rôles qui y sont directement associés (genre). Les générations, quant à elles, nous permettront de tenir compte de l’évolution des facteurs de contexte que sont notamment ces rôles attribués au masculin et au féminin à travers les époques. En effet, les constructions sociales liées au sexe des individus sont susceptibles de changer d’une génération à l’autre et donc d’agir distinctement sur les intentions de carrière. Le fait d’introduire la dimension générationnelle, en plus de celle du genre, est l’occasion d’aborder le concept d’intersectionnalité qui consiste en un croisement des groupes cibles propres à la gestion de la diversité. A l’issue de cet aperçu théorique faisant état de la littérature existante relative à cette thématique des carrières des individus occupant un poste à responsabilités, nous pourrons mettre en évidence différentes questions de recherche qu’il nous faudra, dans un second temps, confronter à la réalité du terrain. [less ▲]

Detailed reference viewed: 16 (2 ULiège)
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See detailNew and old contaminants in the River Meuse catchment
Geraerts; Belpaire; Focant, Jean-François ULiege et al

Conference (2010, April)

Detailed reference viewed: 11 (0 ULiège)
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See detailEvaluation of climate changes impact on the hydrological behaviour of the peaty mediums - Application to the Haute Lesse-Ourthe area (Belgium).
Sohier, Catherine ULiege; Dautrebande, Sylvia; Degre, Aurore ULiege

Poster (2010, April)

The peaty and wet mediums have a very important role to play in term of biodiversity conservation, hydrologic pattern regulation, fauna habitat and landscape value. In the Haute Lesse – Ourthe catchments ... [more ▼]

The peaty and wet mediums have a very important role to play in term of biodiversity conservation, hydrologic pattern regulation, fauna habitat and landscape value. In the Haute Lesse – Ourthe catchments (Saint-Hubert), numbers of these mediums were strongly modified by a drainage network. This drainage network was implemented to permit a forestry production focussed on the Spruce. It has severely disturbed the hydrological cycle. The study consists in modelling the impacts of restoration practices carried out notably within the framework of the LIFE European project on the hydrological behaviour of the peat bog. Then we modelled the effect of climate change. Physical properties and retention curve of peaty materials were characterized on the basis of undisturbed samples using the Richards’apparatus. Calculations were carried out with the hydrological model EPICgrid (GxABT). The model was initially validated on several reference catchments of the study zone. It was then applied at local scale for various peaty mediums (peat type, drainage characteristics, vegetation type) and for current and future climatic conditions. A regional simulation was finally carried out in order to evaluate the impacts of peat bogs restoration measures at catchment scale. Simulations highlighted the differences in physical and hydrous properties of the different peat types (“true” peat and “degraded” peat). Local and regional impacts of peat bogs restoration on their hydrological behaviour have been evaluated. Eventually, simulations allowed us to evaluate climate change’s impact on the hydrological behaviour of the peaty mediums. The model showed notably that future climatic conditions could generate severe droughts which can become critical in some situations. [less ▲]

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See detailModélisation des champs sonores en acoustique architecturale par un processus de diffusion
Picaut, Judicaël; Billon, Alexis ULiege; Valeau, Vincent et al

Conference (2010, April)

La modélisation des champs sonores en acoustique architecturale est d'autant plus complexe que la géométrie d'étude est elle-même complexe. En particulier, le domaine de propagation peut présenter de ... [more ▼]

La modélisation des champs sonores en acoustique architecturale est d'autant plus complexe que la géométrie d'étude est elle-même complexe. En particulier, le domaine de propagation peut présenter de nombreux volumes couplés de tailles très différentes, connectés par de faibles surfaces de couplage. Dans ces conditions, les formulations analytiques classiques, basées par exemple sur la théorie de la réverbération, ou les méthodes numériques, basées par exemple sur des méthodes de tracé de rayons ou de faisceaux sonores, sont difficilement applicables, voire impossibles. Ces dernières années, une solution alternative, fondée sur l'utilisation d'une équation de diffusion pour la densité d'énergie sonore, a été développée et validée. Dans ce présent travail, nous présentons les développements permettant ainsi de modéliser les champs sonores en acoustique des salles, en prenant en compte les difféerents phénomènes propagatifs mis en jeu, tel que l'atténuation atmosphérique, l'absorption par les parois, la transmission acoustique à travers les cloisons et la réflexion mixte au niveau des surfaces. Dans un second temps, nous présentons la méthode retenue pour la résolution numérique des équations de diffusion mises en jeu. A cet effet, une interface logicielle a été spécialement développée, permettant de manipuler de manière fonctionnelle les données géométriques et acoustiques du problème, avant l'exécution d'un logiciel de calcul multi-physique, en s'affranchissant ainsi du formalisme spécifique associé au modèle de diffusion. Cette interface permet ensuite le post-traitement de l'ensemble des résultats, notamment afin de déterminer et de représenter différents paramètres classiques d'acoustique des salles (niveaux sonores, temps de réverbération. . . ). [less ▲]

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See detailApproach of regionalization of low flow of the Walloon Region
Gailliez, Sébastien; Degre, Aurore ULiege

Poster (2010, April)

The walloon part of the Meuse’s watershed represents 12283 km² and 17694 km of river. The anthropogenic pressure is important (population density is more or less 200 inhabitants/km²). In low flow period ... [more ▼]

The walloon part of the Meuse’s watershed represents 12283 km² and 17694 km of river. The anthropogenic pressure is important (population density is more or less 200 inhabitants/km²). In low flow period, water scarcity can touch both the water users (producer of drinking water and hydropower, tourism and pleasure activities and kayaking) and the river itself affecting the ‘good environmental state’ (context of Water Framework Directive 2000/60/CE). The operational management of rivers during low flow periods needs a deep knowledge of this drought phenomenon including an analysis of low flow severity and its occurrence probability. It also needs the computation of low flow discharge at any point of a river based on available hydrologic variables. The aim of this study is the low flows’ regionalization in the Walloon Region. First of all, the time series of flow data are filled in and validated. The quality is then controlled. The different tests are the determination of the minimum year requirement for a monitoring site, homogeneity tests, verification of presence or absence of summer alga and the proportion of extrapolation of the discharge rating curve Secondly, homogeneous regions will be defined and regression equations will be build. These equations will establish the relation between low flow and physical parameters (watershed area, pedology, slope), climate ones and/or ground water ones. The regression model will permit the computation of low flow discharge at any point of an ungauged river. [less ▲]

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See detailTemperature wrinkling prediction in metal/polymer multilayer coatings
Zhang, Lihong ULiege; Ben Bettaieb, Amine ULiege; Habraken, Anne ULiege et al

in International Journal of Material Forming (2010, April), 3(supplement 1), 559-562

Two modeling approaches, analytical and numerical ones were carried out to simulate the mechanical behaviour of a coated metal steel sheet under thermo-mechanical loads. As the metallic film and the ... [more ▼]

Two modeling approaches, analytical and numerical ones were carried out to simulate the mechanical behaviour of a coated metal steel sheet under thermo-mechanical loads. As the metallic film and the polymer layer have different dilatation coefficients, temperature increase and/or humidity variation can result in a compressive state in the metallic film, and yield to bucking. This phenomenon is called wrinkling. It can be prevented by a stiff polymer layer or a stable film due to adapted thickness and mechanical properties. Wrinkling phenomenon has received increasing attention because of important uses of polymeric coating in many industrial applications. To better understand and predict this phenomenon, analytical and numerical models have been developed and compared. [less ▲]

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See detailAutomated respiratory cycles selection improves the variability of respiratory mechanics monitoring.
Rigo, Vincent ULiege; Graas, Estelle; Rigo, Jacques ULiege

in Rimensberger, Peter (Ed.) 10th European Conference on Pediatric and Neonatal Ventilation program (2010, April)

Detailed reference viewed: 27 (5 ULiège)
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See detailReal-time auralization of industrial noise
Embrechts, Jean-Jacques ULiege; Bos, Lionel ULiege

in Proceedings of the Institute of Acoustics & Belgian Acoustical Society (2010, April)

A real-time and interactive auralization system has been developed within the research project Auralias (www.auralias.be). Originally conceived for architectural acoustics applications, this system is now ... [more ▼]

A real-time and interactive auralization system has been developed within the research project Auralias (www.auralias.be). Originally conceived for architectural acoustics applications, this system is now applied to auralize the effect of noise reduction solutions in industrial halls. Some specific characters of this kind of problems are first identified: several sources with intermittent noise emission, rectangular hall geometries, quite reverberant spaces, sound level calibration needed. A protocol for the application of the auralizer is then tested on an example, from the room acoustics model to the final sound rendering. [less ▲]

Detailed reference viewed: 62 (8 ULiège)
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See detail'Securities litigation' – questions de droit international privé
Wautelet, Patrick ULiege

Conference (2010, April)

Cette présentation, destinée à un événement privé, tente d'offrir une synthèse des règles de droit international privé pertinentes dans le contexte des litiges intéressant les marchés financiers. L'accent ... [more ▼]

Cette présentation, destinée à un événement privé, tente d'offrir une synthèse des règles de droit international privé pertinentes dans le contexte des litiges intéressant les marchés financiers. L'accent est mis en particulier sur les litiges relatifs aux offres de titres. Les questions classiques de droit international privé (compétence internationale, droit applicable) sont étudiées en prenant appui sur les règles européennes de droit international privé. La perspective choisie est celle d'une application en Belgique de ces règles. La perspective se veut pédagogique plus que scientifique. [less ▲]

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See detailQuelle place pour les littératures françaises périphériques dans la formation littéraire en Communauté française de Belgique ?
Van Beveren, Julien ULiege

in Les littératures francophones, quels apports, quelles perspectives pour la didactique du français ? (2010, April)

Il sera question ici de la place réservée aux littératures francophones périphériques dans les programmes et référentiels de la Belgique francophone (avec une perspective diachronique) et dans les ... [more ▼]

Il sera question ici de la place réservée aux littératures francophones périphériques dans les programmes et référentiels de la Belgique francophone (avec une perspective diachronique) et dans les principaux manuels de français du secondaire supérieur édités en Belgique francophone. [less ▲]

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See detailBrand Concept Maps: A Method of Capturing Doppelganger Brand Image
Brandt, Céline ULiege; Pahud de Mortanges, Charles ULiege; Bluemelhuber, Christian et al

Conference (2010, April)

In an Internet 2.0 context, negative user-generated content (UGC) that damages the brand reputation can be easily produced and quickly spread. There is a lack of literature on how to measure the impact of ... [more ▼]

In an Internet 2.0 context, negative user-generated content (UGC) that damages the brand reputation can be easily produced and quickly spread. There is a lack of literature on how to measure the impact of this value destruction, known as doppelgänger brand image (DBI). DBI is defined as the appearance, or reinforcement, of negative associations at the brand reputation level. Using brand concept mapping (BCM) on two corporate brands, this study shows the effect of exposure to negative UGC on the brand image perception and measures the impact of this exposure on DBI. The authors use a two*two between-subjects design with 280 consumers in order to study the effects of media and source credibility, brand experience and Internet experience on the DBI. The results suggest that, the negative UGC will cause an increase in the frequency of mentions of negative associations. At the reputation level, if the brand already has a DBI, an exposure to negative UGC will reinforce it. However, if the brand reputation is mostly positive, a single exposure to negative UGC will not create a DBI. The results also confirm the effect of source credibility and media credibility on the likelihood of DBI. The experience with the brand and with Internet will reduce the risk of DBI. [less ▲]

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See detailGenetic variation within β3 subunit integrin sequences and rodent species susceptibility to pathogenic hantaviruses
Pagès, Marie ULiege; Tatard, Caroline; Galan, Maxime et al

Conference (2010, April)

Recent investigations in rodent systematics and epidemiology have led to the discovery of numerous Hantavirus species in Asia. As seroprevalences are very low, the screening of thousands of rodents is ... [more ▼]

Recent investigations in rodent systematics and epidemiology have led to the discovery of numerous Hantavirus species in Asia. As seroprevalences are very low, the screening of thousands of rodents is required to genetically identify these hantaviruses and to determine their human pathogenesis as well as their rodent reservoirs. Pathogenic and non-pathogenic hantaviruses use different integrin receptors to enter cells. In particular, human integrins αIIaβ3 and αvβ3 can mediate cellular entry of hemorragic fever with renal syndrome (HFRS)- and hemorragic pulmonary syndrome (HPS)-causing hantaviruses. In contrast, non-pathogenic or low pathogenic hantaviruses were demonstrated to enter the cell via integrin αvβ1. We tested the hypothesis that amino-acid variation in β3 subunit integrin sequences could provide keys to determine a priori the possibility for a rodent species to carry a human pathogenic hantavirus. We sequenced 330 bp of the β3 chain integrin encompassing the Plexin-Semaphorin-Integrin domain, for 63 individuals corresponding to 14 Asian rodent species. We found 65 variable sites and a high level of divergence between species (up to 12%). Although the genetic variation reflected the neutral phylogeny of these species, we found one site differing between rodent species carrying pathogenic hantaviruses and non reservoir rodent species. We also detected another variable site that could be under positive selection, but only in rodent species that do not carry pathogenic hantaviruses. This site did not exhibit any genetic variation in rodent species that carry hantaviruses. In consequence, it is likely that knowing the amino-acid present at this position for a given rodent species could help us determining a priori whether this species is a reservoir of pathogenic hantaviruses. Further investigations are required to examine whether amino-acid changes at these residues could mediate conformational changes that would prevent the fixation of pathogenic hantaviruses. [less ▲]

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See detailRepresenting Grassed Buffer Strips’ Hydrology in a Regional Scale Model
Sohier, Catherine ULiege; Degre, Aurore ULiege

Conference (2010, April)

In Walloon Region (Belgium), like in many other European countries, riparian buffer strips appear to become one of the most approved nutrient mitigation measures. Within the frame of the water framework ... [more ▼]

In Walloon Region (Belgium), like in many other European countries, riparian buffer strips appear to become one of the most approved nutrient mitigation measures. Within the frame of the water framework directive, policy makers need nutrient mitigation forecasting at the scale of the surface water bodies (from 3 to 426 km² in Wallonia). It induces that the hydrological models have to deal with different designs of the buffers themselves and of their catchment areas. Up to date, most of the studies focused on sediment deposition at field scale. They concluded that the grassed strips can be very effective; nevertheless, the measured effects are still very variable. More often, the way the runoff water passed through the buffer strip (diffused or concentrated flow) is not considered. We adapted our regional hydrological model (physically based, spatially distributed over the 17.000 km² Walloon region (Sohier et al., 2009)) by developing a new “buffer strip subroutine” that identifies automatically the catchment area of all the buffer strips. This is done using a 10 m resolution DTM. The catchment area is then subdivided into an “area of flow concentration” that leads the water to pass through the buffer strip on a very small portion of it and into an “area of diffuse flow” that leads the water to pass through the buffer strip using its whole length. The daily fluxes of water, nutrient and sediments that pass through the buffer are calculated by the model using our dynamic geodatabases (soil, DTM, weather, land use, agricultural practices). Depending on whether the flow is diffused or concentrated the water depth can vary to a large extent; so does the deposition ratio (algorithm adapted from Deletic, 2001). The buffer itself is modelled as grassland without direct fertilisation. Water and nutrient coming from the watershed can be used by the grass, water can infiltrate, evaporate or runoff and denitrification can occur when the soil is saturated. The oral presentation will show our results at the water body level for different buffer strip scenarios considering sediments and nitrate reduction in surface water. [less ▲]

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See detailAir-sea ice CO2 fluxes measurement with eddy-covariance micrometeorological technique
Heinesch, Bernard ULiege; Aubinet, Marc ULiege; Carnat, Gauthier et al

Conference (2010, April)

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See detailTowards sub-quadratic learning of probability density models in the form of mixtures of trees
Schnitzler, François ULiege; Leray, Philippe; Wehenkel, Louis ULiege

(2010, April)

We consider randomization schemes of the Chow-Liu algorithm from weak (bagging, of quadratic complexity) to strong ones (full random sampling, of linear complexity), for learning probability density ... [more ▼]

We consider randomization schemes of the Chow-Liu algorithm from weak (bagging, of quadratic complexity) to strong ones (full random sampling, of linear complexity), for learning probability density models in the form of mixtures of Markov trees. Our empirical study on high-dimensional synthetic problems shows that, while bagging is the most accurate scheme on average, some of the stronger randomizations remain very competitive in terms of accuracy, specially for small sample sizes. [less ▲]

Detailed reference viewed: 75 (21 ULiège)
See detailNeural substrates of cognitive switching and inhibition in a face processing task. Abstract Book of the conference .
Piguet, Camille; Sterpenich, Virginie; Desseilles, Martin ULiege et al

Conference (2010, April)

Detailed reference viewed: 6 (0 ULiège)
See detailEuropean vegetation evolution during the Holocene simulated by Planet Simulator and CARAIB
Haberkorn, K.; Fraedrich, K.; Henrot, Alexandra-Jane ULiege et al

Poster (2010, April)

Detailed reference viewed: 11 (0 ULiège)
See detailAspects environnementaux
Rossi, Barbara ULiege

Conference (2010, April)

Detailed reference viewed: 16 (4 ULiège)
See detailResponse of the European ecosystems to climate change: a modeling approach for the 21st century
Dury, Marie ULiege; Warnant, Pierre; François, Louis ULiege et al

Poster (2010, April)

Detailed reference viewed: 9 (1 ULiège)
See detailQuantitative determination of cannabinoids in serum by UHPLC/MS-MS
Dubois, Nathalie ULiege; Paccou, A.; DE BACKER, Benjamin ULiege et al

Poster (2010, April)

Detailed reference viewed: 23 (9 ULiège)
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Peer Reviewed
See detailAnalytical Aspects of POPs
Focant, Jean-François ULiege

Conference (2010, April)

Detailed reference viewed: 6 (1 ULiège)
Full Text
Peer Reviewed
See detailMICROPOLLUTANTS ISSUES: A MODELLING STUDY OF HEAVY METALS WITHIN TWO FRENCH BASINS AND A TEST APPLICATION TO COCAINE IN BELGIUM
Deliège, Jean-François ULiege; Everbecq, Etienne ULiege; Grard, Aline ULiege et al

Poster (2010, April)

European policies (European Framework Directive: Water 2000/60/CE, Directive 76/464/CE) impose to reduce the releases of about a hundred substances in surface water. In the last years, the AQUAPOLE has ... [more ▼]

European policies (European Framework Directive: Water 2000/60/CE, Directive 76/464/CE) impose to reduce the releases of about a hundred substances in surface water. In the last years, the AQUAPOLE has been involved in two studies related to this matter. First, on the request and with the financial support of both the French Ministry of Environment and ONEMA (“Office National de l’Eau et des Milieux Aquatiques”), INERIS (“Institut National de l’Environnement Industriel et des Risques”) drew up the guidelines of a methodology allowing fixing the local Limit Values to Emission so as to abide by the quality standards on the whole watershed. Within this context, INERIS wishes to test the use of pollutant transfer models on pilot sub-basins. The PEGASE model has been used to simulate micropollutants on two concrete use cases (1): (iii) in the Meuse sub-basin, managed by the French Water Agency Rhine-Meuse, for simulations concerning cadmium and zinc; (iv) in the Adour sub-basin, managed by the French Water Agency Adour-Garonne, for simulations applied to cadmium and copper. The choice of each substances and sub-basins was made by mutual agreement between INERIS, the concerned Water Agencies, and the AQUAPOLE. A major selection criterion for the substances and the sub-basins was the availability of data (sources and in situ measurements). For the second study, the PEGASE model has been adapted to describe the cocaine’s behaviour (using a stable metabolite of the cocaine in the environment: the benzoylecgonine (BZE)) in waste water, waste water treatment plants (WWTP) and surface water (2). The cocaine is newly described in the model as an additional micropollutant (PEGASE already treats numerous heavy metals), thanks to the implementation of new state variable equations and their specific parameterizations. Simulations of BZE have been done in the Walloon and Flemish regions, where many measurements from the COWAT project (3) were available. The first results are showing good agreement between calculated and measured values. The ability of the model to simulate the fate of studied micropollutants (cadmium, zinc, copper, and the cocaine derivatives) in surface waters should be enhanced and extended to other substances and basins. Moreover, additional data still have to be collected and measured. [less ▲]

Detailed reference viewed: 81 (21 ULiège)
See detailDiversité des relations sol plantes dans les écosystèmes extrémophiles et implications pour la restauration : le cas des végétations cupricoles du Katanga, RDC.
Seleck, Maxime ULiege; Lebrun, Julie ULiege; Guillaume, Arielle ULiege et al

Conference (2010, March 31)

Les collines de cuivre et de cobalt du Katanga (RDC) sont des milieux isolés présentant des substrats hautement toxiques (>10.000 ppm cuivre, gradients très marqués). De ce fait, ces gisements hébergent ... [more ▼]

Les collines de cuivre et de cobalt du Katanga (RDC) sont des milieux isolés présentant des substrats hautement toxiques (>10.000 ppm cuivre, gradients très marqués). De ce fait, ces gisements hébergent des communautés végétales originales, avec une diversité d’espèces métallophytes spécialisées, en relation étroite avec la concentration en métaux du sol. La récente reprise des activités minières dans la région menace grandement ces écosystèmes. La restauration de ces communautés végétales nécessite une compréhension fine des relations entretenues avec leur environnement édaphique et la caractérisation de la diversité intra et inter sites de ces communautés. Trois gisements ont fait l’objet d’une étude détaillée sur base d’un échantillonnage systématique en fonction du gradient à priori d’ETM. Dans des placette de 1m², un échantillon composite de sols a été prélevé à deux profondeurs : 0-15 cm et 30-45 cm et analysé pour : pH, Corg, N tot, Cu, Co, Zn, Mn, Fe, K, Mg, Ca et P biodisponibles. L’abondance des espèces présentes au sein des quadrats a été mesurée selon leur pourcentage de recouvrement. L’analyse en groupement et la mise en relation flore-sol par les méthodes de CCA indiquent que les sites présentent des conditions de sol et des végétations bien différenciées bien que les deux mêmes formations sont présentes. Les concentrations en cuivre sont un facteur explicatif important de la variation de la flore mais d’autres paramètres édaphiques s’avèrent également essentiels (Mg, Mn, K, Ca). Toutefois la sélection des paramètres édaphique expliquant la variation de la flore diffère d’un site à l’autre indiquant la grande diversité de ces écosystèmes et la nécessité de développer des approches de restauration spécifiques à chaque site. [less ▲]

Detailed reference viewed: 162 (14 ULiège)
See detailSelection of circadian clock models for robust entrainment: an analysis based on the phase response curve
Sacré, Pierre ULiege; Hafner, Marc; Heinz, Koeppl et al

Conference (2010, March 30)

Detailed reference viewed: 59 (30 ULiège)
Peer Reviewed
See detailOdor measurement : search for a proper analytical device
Nicolas, Jacques ULiege

Conference (2010, March 30)

Detailed reference viewed: 21 (2 ULiège)
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Peer Reviewed
See detailHydrodynamique souterraine et vulnérabilité à la pollution des ressources en eau en zone urbaine tropicale : cas du bassin versant de Mingoa (Yaoundé-Cameroun)
Kouam Kenmogne, Guy Romain; Ntep, François; Rosillon, Françis ULiege et al

Conference (2010, March 29)

Une étude conjointe visant la compréhension des phénomènes d’hydrodynamique souterraine et de vulnérabilité des eaux à la pollution a été menée dans le bassin versant de Mingoa situé dans le périmètre ... [more ▼]

Une étude conjointe visant la compréhension des phénomènes d’hydrodynamique souterraine et de vulnérabilité des eaux à la pollution a été menée dans le bassin versant de Mingoa situé dans le périmètre urbain de Yaoundé. Il ressort de cette étude que le comportement hydrodynamique dans ce bassin est étroitement lié aux fluctuations pluviométriques. La carte hydrodynamique de l’aquifère supérieur du bassin versant de Mingoa révèle deux types d’écoulements convergents et divergents avec les grands axes de drainage d’orientation globale NE - SW ; SE - NW et N - S permettant de délimiter des sites favorables à l’implantation d’ouvrages de captage des eaux souterraines. Les sources potentielles de pollution répertoriées sont nombreuses et variées (latrines, tas d’ordures sauvages,...). Les résultats des analyses physico-chimiques ont permis de constater que hormis la température, le potentiel d’hydrogène (pH), CO2 libre et l’azote ammoniacal, les valeurs des autres paramètres sont bien centrées sur les normes de qualité des eaux destinées à la consommation humaine prescrite par l’Organisation Mondiale de la Santé (OMS). Cependant, les valeurs des teneurs en en Streptocoques Fécaux (de 48 UFC/100 ml à 5,80 x 105 UFC/100 ml) et en Coliformes Fécaux (de 300 UFC/100 ml à 1,07 x 106 UFC/100 ml) sont largement supérieures aux valeurs seuils requises par l’OMS et permettent de conclure que ces eaux sont polluées et vivement déconseillées à la consommation humaine. Sur la base des données ponctuelles issues des simulations et des différentes analyses des eaux et des sols, la dynamique de contamination des nappes d’eau superficielles et souterraines dans les zones cristallines fracturées et densément peuplées a été posée. Deux zones de protection ayant respectivement des rayons de 10 mètres et de 20 mètres peuvent être envisagées afin de permettre au sol de jouer pleinement son rôle épurateur. Des mesures adéquates (campagnes d’information, établissement des zones de protection, ...) doivent être engagées dans ce bassin versant et au-delà dans toute la ville de Yaoundé afin de faire face à la dégradation assez avancée des ressources en eau et ceci malgré des contraintes socio-économiques et foncières qui constituent des freins à cette dynamique. [less ▲]

Detailed reference viewed: 146 (2 ULiège)
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See detailSeaDataNet regional climatologies: an overview
Troupin, Charles ULiege; Ouberdous, Mohamed ULiege; Barth, Alexander ULiege et al

Poster (2010, March 29)

Detailed reference viewed: 48 (2 ULiège)
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See detailGODIVA: a 4-dimension implementation of DIVA
Troupin, Charles ULiege; Ouberdous, Mohamed ULiege; Beckers, Jean-Marie ULiege

Poster (2010, March 29)

Detailed reference viewed: 35 (0 ULiège)
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See detailEnjeux sanitaires, socio-économiques et environnementaux liés à la réutilisation des eaux usées dans le maraîchage urbain à Yaoundé au Cameroun : cas du bassin versant de l’Abiergué
Kouam Kenmogne, Guy Romain; Rosillon, Françis ULiege; Mpakam, Hernanie Grelle et al

Conference (2010, March 28)

Le bassin versant de l’Abiergué, localisé dans le périmètre urbain de Yaoundé entre 11°05’ et 11°25’ de longitude Est et entre 3°51’ et 3°54’ de latitude Nord connaît une importante activité maraîchère ... [more ▼]

Le bassin versant de l’Abiergué, localisé dans le périmètre urbain de Yaoundé entre 11°05’ et 11°25’ de longitude Est et entre 3°51’ et 3°54’ de latitude Nord connaît une importante activité maraîchère dans les bas fonds de Nkolbikok à Nkolbisson. Une étude démarrée en 2005 dans cette unité géographique, a pour objectif principal de contribuer à la valorisation de cette activité tout en oeuvrant à la réduction des impacts négatifs induits. De nombreuses activités ont été développées suivant une approche transdisciplinaire. Les statuts socio-économiques des acteurs impliqués dans cette filière ont été décrits. Les contraintes et les atouts liés au développement du maraîchage ont été relevés. L’eau du cours d’eau Abiergué utilisée pour l’arrosage des plantes est polluée par des eaux usées et des déchets solides issus des ménages, du marché Mokolo, des centres de santé,… et présentent des teneurs non négligeables en Coliformes fécaux (5025 UFC/100ml à 3 x 106 UFC/100ml), Streptocoques fécaux (1960 UFC/100ml à 138 000 UFC/100ml) et Escherichia coli (2 à 20 germes/100ml). Des taux variables de kystes de protozoaires (Entamoeba hystolitica et Giardia sp) et des oeufs d’helminthes ont été décelés dans ces eaux. L’utilisation des eaux usées a pour corollaire l’émergence de maladies hydriques telles que l’amibiase intestinale qui affecte aussi bien les acteurs engagés dans cette filière que la population en général indépendamment du sexe, de l’âge ou du statut social. De nombreuses pratiques et de nombreux comportements à risque ont été identifiés et concourent à la propagation des maladies hydriques. Malgré les risques de maladies hydriques, cette activité contribue considérablement à l’amélioration des conditions et du cadre de vie des catégories d’acteurs engagés dans cette activité en particulier et des populations en général. Des actions économiquement viables, socialement acceptables et écologiquement durables sont préconisées afin de réduire les aspects négatifs et de consolider les aspects positifs de cette activité multifonctionnelle. [less ▲]

Detailed reference viewed: 61 (3 ULiège)
See detailLes relations entre la mémoire à court terme verbale et troubles du langage.
Majerus, Steve ULiege

Conference (2010, March 27)

Detailed reference viewed: 8 (3 ULiège)
Peer Reviewed
See detailLa réflexivité dans l’écoute de l’environnement
Colon, Paul-Louis ULiege

Conference (2010, March 26)

La communication montre, à partir de résultats d'une enquête ethnographique en cours, l'intérêt méthodologique et théorique de la notion de réflexivité pour étudier le processus de constitution de la gêne ... [more ▼]

La communication montre, à partir de résultats d'une enquête ethnographique en cours, l'intérêt méthodologique et théorique de la notion de réflexivité pour étudier le processus de constitution de la gêne dans le cas des nuisances sonores environnementales. [less ▲]

Detailed reference viewed: 32 (4 ULiège)
Full Text
See detailQuels tests utiliser pour évaluer les troubles cognitifs en cancérologie?
Adam, Stéphane ULiege

Conference (2010, March 26)

Detailed reference viewed: 13 (0 ULiège)
Full Text
See detailLe brouillard mortel de la Meuse en 1930
Peters, Arnaud ULiege; Zimmer, Alexis

in Le Risque industriel. Une question de sciences humaines et sociales (Publication numérique) (2010, March 25)

Detailed reference viewed: 108 (22 ULiège)
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Peer Reviewed
See detailUn exemple de grille d'évaluation de stages pour futurs professeurs
Schneider-Gilot, Marguerite ULiege

Conference (2010, March 25)

Detailed reference viewed: 10 (0 ULiège)
See detailLogical Analysis of Data and Classification
Crama, Yves ULiege

Conference (2010, March 25)

Detailed reference viewed: 14 (0 ULiège)
See detailFirst experience with Architect urine NGAL
Cavalier, Etienne ULiege; Delanaye, Pierre ULiege

Conference (2010, March 25)

Detailed reference viewed: 37 (2 ULiège)
Full Text
Peer Reviewed
See detailSome Considerations on Political Reasoning Among Young French-speaking Belgians: Who Are Ready to Vote at 16?
Fournier, Bernard ULiege

Conference (2010, March 24)

The question of lowering the voting age to 16 has long been debated in university circles. In the last Austrian elections, young people aged 16 and older were invited to vote, even if young people ... [more ▼]

The question of lowering the voting age to 16 has long been debated in university circles. In the last Austrian elections, young people aged 16 and older were invited to vote, even if young people themselves are divided over this issue, even hostile to the idea. Nevertheless, isn’t such a question, which is rarely discussed by the larger public and touches on several dimensions of a person’s life, an ideal topic for a debate, where the confrontation of ideas may change opinions and reveal – or even modify – young people’s global attitudes towards political interest and participation? A sample of one hundred 15- to 21-year-old youth in French-speaking Belgium was selected to discuss the possibility of lowering the voting age to 16, as well as political interest and political participation, during one day with four experts. The same questionnaire was filled in in the beginning and at the end of the day. These first results are presented here. They show little evolution during the discussion, in a sample already largely against the idea of lowering the voting age. However, these are the consequences for political socialisation we would like to discuss with this research project based on political reasoning. [less ▲]

Detailed reference viewed: 36 (15 ULiège)
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See detailEntrepreneurial mindset and institutional innovations triggered by rice parboiling video in Benin
Zossou, Enangnon ULiege; Van Mele, Paul; Vodouhe, Davo Simplice et al

Conference (2010, March 24)

To improve rice parboiling in Benin, an improved parboiling process with new equipment is being released. Farmer-to-farmer video (initiated by Africa Rice Center) was used by four local NGOs in the ... [more ▼]

To improve rice parboiling in Benin, an improved parboiling process with new equipment is being released. Farmer-to-farmer video (initiated by Africa Rice Center) was used by four local NGOs in the Department of Collines to disseminate the technology. In order to explore changes that have been made in this rural area following the use of this learning approach, 160 women and 17 women’s associations were surveyed in 16 villages where the video was shown. Qualitative and quantitative data were collected using focus groups, semi-structured interviews, participant observations, questionnaires and photographs. The video had not only improved women’s creative spirit, but also their motivation and awareness about the importance of parboiling as a revenue-generating activity. Women have become organized around rice parboiling leading to the creation of associations, more appeals to NGOs for additional training in rice parboiling, improved service delivery and improved packaging and marketing of parboiled rice. Improving women’s entrepreneurial spirit contributed to improving the quality of parboiled rice and therefore to an increase in its price, which increased women’s revenues and strengthened social cohesion. The video favored not only the improvement of extension methods used by facilitators, but also the strengthening of relationships among facilitators, rural communities, women processors, microfinance institutions, and input and output markets. Women had more access to formal credit because of their improved organization. Rice producers who attended the open-air video shows at the same time as the women rice processors became more willing to sell rice on credit to the women. The results of this study have allowed us to understand how video can favor the development of institutional innovations and reinforce relationships between facilitators and rural entrepreneurs. [less ▲]

Detailed reference viewed: 82 (0 ULiège)
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See detailA robust antibacterial coating for stainless steel
Faure, Emilie ULiege; Charlot, Aurélia; Sciannaméa, Valérie et al

Conference (2010, March 23)

Because of corrosion, chemical resistance, relevant mechanical and esthetical properties, stainless steel is widely used in the daily life, not only in the building industry but also in the food industry ... [more ▼]

Because of corrosion, chemical resistance, relevant mechanical and esthetical properties, stainless steel is widely used in the daily life, not only in the building industry but also in the food industry, the appliances or in the medical field, including implants in orthopedic surgery. However, stainless steel is unable to prevent bacteria from adhering, proliferating and forming a resistant biofilm. Therefore, surface modification is needed for providing the metal surface with antibacterial properties. The scientific literature is very rich in describing various methods for imparting antibacterial properties to different inorganic supports. However, the activity of the coating is generally time limited by the diffusion of the biocide in the environment. Novel robust and stable antibacterial coatings on stainless steel are thus highly desirable for the durability of the functionality. In this communication, we report on an all-in-one approach to prepare robust antimicrobial films on stainless steel using the layer-by-layer deposition of polyelectrolytes. Novel biocidal multilayered polyelectrolyte films in which the polycationic layer is silver loaded and bears 3,4-dihydroxyphenylalanine (DOPA), known as a promoter of adhesion to inorganic surfaces, were deposited onto stainless steel. DOPA was incorporated in the polycationic chains by radical copolymerisation of N-methacrylated DOPA with the commercially available quaternary ammonium salt of 2-(dimethylamino)ethyl methacrylate (DMAEMA+). Polystyrene sulfonate (PSS) was the polyanionic constituent of the films. In order to boost the antibacterial activity of the polycationic layer, AgNO3 was added to the aqueous solution of P(DOPA)-co-P(DMAEMA+), which resulted in the in-situ formation of silver based nanoparticles (Ag° and AgCl) that are sources of biocial Ag+. The layer-by-layer deposition of aqueous P(DOPA)-co-P(DMAEMA+)/AgCl/Ag0 suspension and aqueous solution of PSS provides stainless steel with high antibacterial activity against Gram-negative E. Coli bacteria. Moreover, after silver depletion, films retain some antimicrobial activity, thanks to the ammonium groups of the copolymer. We will also show how the antibacterial activity of the films can then be easily re-boosted. The multi-functionality of the P(DOPA)-co-P(DMAEMA+) is a key issue in this process (i) the DOPA co-units are anchored to stainless steel, (ii) these co-units reduce partly AgNO3 into Ag0 nanoparticles and stabilize them by chelation, (iii) the chloride counter-anions react with AgNO3 by ionic exchange, leading to the in situ formation of AgCl particles, and (iv) the ammonium groups are responsible for permanent antibacterial activity. Besides the advantage of the all-in-one process, another major advantage of the approach proposed here is the implementation of the whole process of film formation, including the synthesis of P(DOPA)-co-P(DMAEMA+), in aqueous media under very mild conditions. It makes the strategy very attractive for industrial scaling-up and sustainability applications. [less ▲]

Detailed reference viewed: 205 (24 ULiège)
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Peer Reviewed
See detailPensiero giuridico ed esperienza politica nel Rinascimento italiano
Moreno, Paola ULiege

Conference (2010, March 23)

Detailed reference viewed: 19 (3 ULiège)
See detailRoxolid a new implant material
LAMBERT, France ULiege; ROMPEN, Eric ULiege

Conference (2010, March 23)

Detailed reference viewed: 51 (3 ULiège)
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See detailAppréhender le conflit sous l'angle de la relativisation
Grandjean, Geoffrey ULiege

Conference (2010, March 23)

Detailed reference viewed: 14 (1 ULiège)
See detailInsights into the metagenomic approach : identification and characterization of cellulases involved in bacterial cellulose synthesis
Berlemont, Renaud ULiege; Delsaute, Maud ULiege; Galleni, Moreno ULiege

Conference (2010, March 22)

the mining of an Antarctic soil sample by functional metagenomics allowed the isolation of a cold-adapted protein (RBcel1) that hydrolyzes only carboxymethyl cellulose. The new enzyme is related to family ... [more ▼]

the mining of an Antarctic soil sample by functional metagenomics allowed the isolation of a cold-adapted protein (RBcel1) that hydrolyzes only carboxymethyl cellulose. The new enzyme is related to family 5 of the glycosyl hydrolase (GH5) protein from Pseudomonas stutzeri (Pst_2494) and does not possess a carbohydrate-binding domain. The protein was produced and purified to homogeneity. RBcel1 displayed an endoglucanase activity, producing cellobiose and cellotriose, using carboxymethyl cellulose as a substrate. Moreover, the study of pH and the thermal dependence of the hydrolytic activity shows that RBcel1 was active from pH 6 to pH 9 and remained significantly active when temperature decreased (18% of activity at 10 1C). It is interesting that RBcel1 was able to synthetize non-reticulated cellulose using cellobiose as a substrate. Moreover, by a combination of bioinformatics and enzyme analysis, the physiological relevance of the RBcel1 protein and its mesophilic homologous Pst_2494 protein from P. stutzeri, A1501, was established as the key enzymes involved in the production of cellulose by bacteria. In addition, RBcel1 and Pst_2494 are the two primary enzymes belonging to the GH5 family involved in this process. [less ▲]

Detailed reference viewed: 34 (2 ULiège)
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See detailNanocoatings of inorganic surfaces by molecular biomimetic
Vreuls, Christelle ULiege; Genin, Alexis ULiege; Zocchi, Germaine ULiege et al

Poster (2010, March 22)

Detailed reference viewed: 61 (21 ULiège)
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Peer Reviewed
See detailVariation in external morphology of resident bottlenose dolphins (Tursiops truncatus) in Bahia San Antonio, Patagonia, Argentina.
Vermeulen, Els ULiege; Cammareri, Alejandro

Poster (2010, March 22)

Two geographic variations of bottlenose dolphins were described in Argentina (Bastida & Rodriguez, 2003); bottlenose dolphins characterized by their triangular dorsal fin shape (coast of the province of ... [more ▼]

Two geographic variations of bottlenose dolphins were described in Argentina (Bastida & Rodriguez, 2003); bottlenose dolphins characterized by their triangular dorsal fin shape (coast of the province of Buenos Aires), and bottlenose dolphins characterized by their falcate dorsal fin shape (coast of the province of Chubut). It was stated that `their clear difference would indicate that both geographic forms are isolated¿ (Bastida & Rodriguez, 2003 p.137). A photo-identification study carried out in Bahía San Antonio (BSA), North Patagonia Argentina, showed a similar variation in external morphology among year-round resident bottlenose dolphins. Out of the 15 bottlenose dolphins considered year-round resident in the bay (Vermeulen & Cammareri, 2009), three are clearly distinguishable by a more falcate dorsal fin, a darker coloration and a notably shorter beak. These individuals, with one associated calf, were first identified in September 2008 and could be re-identified in the study area up to 13 days over all the different seasons. On all occasions, they were re-identified in close association with each other and on 10 occasions in close association with triangular dorsal fin shaped bottlenose dolphins. Behavioural observations made during these associations indicated that these mixed dolphin groups were 18% of their time feeding, 18% socialising, 17% slowly travelling and resting, 16% travelling in medium and fast speed and 7% milling (n=380 min). Although both forms show variations in external morphology, the extent to which this phenotypic variation is genetically correlated remains unknown. A clear insight on the differentiation between these regional forms might have important conservation implications for this species in Argentina. [less ▲]

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See detailStudy of quasar host galaxies combining HST/ACS images and VLT Spectroscopy
Letawe, Yannick; Letawe, Géraldine ULiege; Magain, Pierre ULiege

in Macchetto, F. D. (Ed.) The Impact of HST on European Astronomy (2010, March 22)

We present the results of a study of the host galaxies of a few bright low redshift quasars, based on a combination of high resolution HST/ACS images with deep VLT spectra. Using a version of the MCS ... [more ▼]

We present the results of a study of the host galaxies of a few bright low redshift quasars, based on a combination of high resolution HST/ACS images with deep VLT spectra. Using a version of the MCS deconvolution algorithm specially adapted to HST images, the light from the central point source can be efficiently removed, which allows to study the environment of the quasar down to a few hundreds of parsecs from the center. In a similar way, the spectra can be separated into a quasar contribution and a spatialy resolved slit spectrum of the host galaxy. Combinig the images and spectra allows to carry out a detailed analysis of the immediate environment of the quasar: excitation and ionisation state of the gas, dynamics... Up to now, this method has been applied to six quasars, including the peculiar HE0450-2958 for which no host galaxy could be detected. [less ▲]

Detailed reference viewed: 38 (5 ULiège)
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See detailImpact of the crystallisation pathway of inulin on its mono-hydrate to hemi-hydrate thermal transition
Ronkart, Sébastien; Deroanne, Claude; Paquot, Michel ULiege et al

Poster (2010, March 22)

Inulin plays a major role in the food industry as dietary fibre, bulking agent and fat or sugar substitute. Thermal properties of two inulins obtained from different crystallisation pathways were ... [more ▼]

Inulin plays a major role in the food industry as dietary fibre, bulking agent and fat or sugar substitute. Thermal properties of two inulins obtained from different crystallisation pathways were investigated. The first one, was obtained by fractional precipitation of a saturated inulin solution (40/120). The second one, came from a solid amorphous inulin (95/120). These two inulins were spray dried with an inlet air temperature of 120°C. Then, these powders were placed into controlled atmosphere conditions at 0 % HR during one week and at 94% during the same time. Finally the two inulins were called 40/120/94% and 95/120/94% and their thermal properties were investigated by Wide angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), temperature resolved wide angle X-ray scattering (TRWAXS) and thermogravimetry (TGA).Although WAXS did not show any difference between the two inulin, thermal analysis revealed the existence of a hemi-hydratate inulin (40/120/94%). This fact has an implication on the processing of the powder at an industrial level. Indeed, 40/120/94% has shown an agglomeration whereas 95/120/94% was a continuous mass. In other words, polymorphism of inulin crystals induces technofunctionality changes of the powder (hygroscopy, solubility, etc.) which could have an impact during processing or formulation of the powder. [less ▲]

Detailed reference viewed: 58 (14 ULiège)
See detailChanger les habitudes et les comportements en termes de mobilité
Maréchal, Kevin ULiege

Conference (2010, March 21)

Detailed reference viewed: 14 (0 ULiège)
See detailScreening of basic properties of amphiphilic molecular structures for colloidal system formation and stability: case of carbohydrate-based surfactants
Razafindralambo, Hary ULiege; Blecker, Christophe ULiege; Paquot, Michel ULiege

Conference (2010, March 21)

Carbohydrate-based surfactants (CBS) are amphiphilic molecules with particular interests. These surface-active compounds can be produced from the most abundant renewable materials allowing large product ... [more ▼]

Carbohydrate-based surfactants (CBS) are amphiphilic molecules with particular interests. These surface-active compounds can be produced from the most abundant renewable materials allowing large product concept possibilities. They may occur in a wide range thanks to numerous functional groups. These make possible the design of a quasi-unlimited compounds by (bio)-synthesis of new structures, or by modifying existing natural molecules. This structural diversity can generate a wide range of properties which could be developed in food and non-food applications. Our challenge is to find out the most suitable molecular structures for post)development of CBS according to the specific required properties in various industrial applications. This consists of assessing the interfacial properties of various CBS prepared by chemical, enzymatic, or chemo-enzymatic synthesis routes from the derivatives of bio-renewable materials.The effect of the polar head group, the hydrophobic chains (length, number), and the linker will be presented and discussed. [less ▲]

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See detailImages dessinées/images animées. Stratégies et convergences de la firme Marvel
Tomasovic, Dick ULiege

Conference (2010, March 20)

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See detailGlossaires pour rire ou Le lexique comme style.
Saint-Amand, Denis ULiege

Conference (2010, March 20)

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See detailPostoperative sialadenitis with chronic brachial plexopathy
Reuter, Gilles; Racaru, Tudor ULiege; Nguyen khac, Minh-Tuan et al

Poster (2010, March 20)

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See detailRelease of cardiac biomarkers after an intense physical exercise: preliminary results
Le Goff, Caroline ULiege; Laurent, Terry; Chapelle, Jean-Paul ULiege et al

Poster (2010, March 20)

Background: Over the past 2 decades, there has been a large interest in cardiac markers elevations, which are often seen following endurance sport events. These elevations were transient, with levels ... [more ▼]

Background: Over the past 2 decades, there has been a large interest in cardiac markers elevations, which are often seen following endurance sport events. These elevations were transient, with levels decreasing to pre-event concentrations within 24-48 hours. This might be explained by the relatively short half-life of studied markers, or water imbalance during and after the event. Therefore, the present preliminary study aimed to examine the increase in N-terminal pro-brain natriuretic peptide (NT-proBNP), highly sensitivity cardiac troponin T (hsTnT) and I (TnI II), myoglobin, creatine kinase muscle – brain (CK-MB), myeloperoxydase (MPO) and Highly sensitive C-reactive protein (hs-CRP) elevations after prolonged strenuous exercise . Materials and methods: Blood samples (EDTA plasma and heparinised plasma) were drawn at baseline, after 45, 90, 105, 165, 225, 285, 345, 690 and 1440 minutes in two healthy persons (29 year, trained 6 hours per week; 23 year, untrained). Each subjects runs at the maximal possibility during 2 hours. Results: For the untrained person, level of NT-proBNP exceeded the upper reference limits 12 hours after exercise but increased in all times. HsTnT and TnI II levels were upper the reference limit respectively 45 minutes and directly after exercise and increased up to 4 hours after exercise. We reported a decrease of these concentrations above the reference limits after 24 hours. Myoglobin increased after 45 minutes until 5 hours after exercises. It decreased after the 5th hour to be normalized 24 hours after exercise. CK-MB increased directly after the exercise and was upper the reference limits 165 minutes after the exercise. Level of MPO was very high just after exercise and decreased quickly in the following hours to be just upper the limit references 24 hours after exercise. HsCRP levels increased after 105 minutes and continued to increase after 24 hours. For the trained subject, we noted the same profile of increase of cardiac markers levels stayed but in the range of reference. Conclusion: These cases are extremely interesting. Indeed, this observation suggested a physiological counter regulatory process rather a simple increase of myocardial damage related to the intensity of exercise. In fact, for this moment, we do not know if the release of cardiac markers is physiological or pathological thus it must be studied. This preliminary study on endurance training suggested that intensively is determinants of the rate and the magnitude of subsequent cardiac marker release. These results suggested that an adaptation mechanism could exist. Benefits and possible long-term negative aspects of prolonged exercise should be evaluated with a more important population of athletes. [less ▲]

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See detailGPS™ II and GPS™ III: comparison of obtained platelets concentrations
Kaux, Jean-François ULiege; Le Goff, Caroline ULiege; Renouf, Julien et al

Poster (2010, March 20)

Introduction: Recently, several researches, essentially in vitro, demonstrated the positive effects of platelets on healing process of different tissues: bones, muscles and tendons. The aim of this study ... [more ▼]

Introduction: Recently, several researches, essentially in vitro, demonstrated the positive effects of platelets on healing process of different tissues: bones, muscles and tendons. The aim of this study is to compare the obtained platelets concentration between the new GPS™ III and GPS™ II. Methods: Two blood samples of 52 mL were taken in 5 volunteers and transferred respectively in both GPS™ II and GPS™ III. These devices were centrifuged at 3200 RPM during 15 min. The platelet-rich plasma (PRP) was thus collected and transferred in 6 mL test tubes. Cells count was done using an analyser ABX Micros 60. Results and conclusion: Platelets concentrations were more important from 6.2 up to 9.2 times with GPS™ II and from 7.3 up to 8.3 times with GPS™ III compared to blood samples. Efficiency of the collected platelets was around 92% for GPS™ II and 96% for GPS™ III. Both techniques made it possible to collect platelets but, unfortunately, also a lot of red and white blood cells. None of these parameters showed any significant difference (p>0.05). Conflicts of interests: The 10 devices GPS™ II and GPS™ III were provided gracefully by the firm Biomet Biologics TTC. [less ▲]

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See detailPlatelet-rich plasma (PRP) increases healing process of rats' Achilles tendons
Kaux, Jean-François ULiege; Drion, Pierre ULiege; Pascon, Frédéric ULiege et al

Conference (2010, March 20)

Introduction Some tendinopathies (epicondylitis, jumper’s knee or Achilles tendinopathy) are frequently considered as rebel to “classic” treatments such as rest, orthotics, NSAIs, electrotherapy ... [more ▼]

Introduction Some tendinopathies (epicondylitis, jumper’s knee or Achilles tendinopathy) are frequently considered as rebel to “classic” treatments such as rest, orthotics, NSAIs, electrotherapy, physiotherapy, corticosteroid infiltrations, extracorporeal shock waves… Recently, several studies, essentially in vitro, demonstrated the positive effects of platelets on the healing process of different tissues: bones, muscles and tendons. Objectives The aim of our experiment was to ascertain whether the use of platelet-rich plasma (PRP) was of interest for accelerating the healing process of Achilles tendon after surgical induced lesion. Methods A 5mm defect was surgically induced in rat Achilles tendon after resection of plantaris tendon. Rats were divided into 2 groups: A: control (no injection) and B: PRP injection. Rats of group B received a PRP injection in situ after the surgery. Afterwards, rats of both groups were placed in their cage without immobilization. After 5, 15 and 30 days, rats were euthanized. The traumatized Achilles tendon of each rat was removed and dissected during this healing process. Immediately after sampling, tendons were submitted to a biomechanical tensile test up to rupture, using a “Cryo-jaw”. Results We demonstrated that the force necessary to induce tendon rupture during biomechanical tensile test study was more important for tendons which had been submitted to an injection of PRP. These results were noticed from day 5 onwards. Discussion – Conclusion This experimentation has shown that PRP injections could accelerate tendons healing process and increase the force needed to break tendons in their healing process. This “accelerating” process can be observed as early as day 5. Acknowledgement This experimentation was partially financed by “Standard de Liège 2007” and “Lejeune-Lechien 2008” grants. [less ▲]

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See detailComparison between platelet-rich plasma (PRP) and vascular endothelial growth factor-111 (VEGF-111) as a therapeutic tool in tendon healing process
Kaux, Jean-François ULiege; Drion, Pierre ULiege; Libertiaux, Vincent ULiege et al

Poster (2010, March 20)

Introduction In spite of the availability of various treatments for tendinopathy, this pathology often becomes chronic. For this reason, it is of interest to develop new treatments. Among them, the ... [more ▼]

Introduction In spite of the availability of various treatments for tendinopathy, this pathology often becomes chronic. For this reason, it is of interest to develop new treatments. Among them, the injection of platelet-rich plasma (PRP) seems to be a promising one. Indeed, several animal models have demonstrated that injection of blood platelets can initiate and stimulate tendon and ligament repair by releasing growth factors (GF) locally. Among all the GF released by activated platelets, the vascular endothelial growth factor-A (VEGF-A) is known to induce positive effects on vascular function and angiogenesis, and could be implicated in the healing process of tendons. Recently, a novel VEGF-A isoform was identified, the VEGF-111, a biologically active and proteolysis-resistant VEGF-A isoform, also known to present beneficial effects on ischemic diseases. This prompted us to evaluate whether VEFF-111 would have a therapeutic interest within the framework of the tendon pathology. Aim of the study: We hypothesized that the healing of ruptured Achilles tendons, which is the last stage of the Blazina’s classification, could be improved by injection of VEGF-111 that was compared to the potential effect of PRP injections using a rat model. Methods: A 5mm defect was surgically induced in rat Achilles tendon after resection of plantaris tendon. Rats were divided into 3 groups: A: control (no injection), B: PRP treatment and C: VEGF-111 treatment. Rats received a local injection of PRP (50µL) or VEGF-111 (100ng) in situ after the surgery and were placed in their cage without immobilization. After 5, 15 and 30 days, the rats were euthanized in each group. The traumatized Achilles tendon of each rat was removed and dissected during the healing process. Immediately after sampling, tendons were submitted to a biomechanical tensile test up to rupture, using a “Cryo-jaw”. Results: Our results show that developed force necessary to induce tendon rupture during biomechanical tensile test was more important for tendons which had received an injection of PRP or VEGF-111. Moreover, the tensile force necessary to break tendons is higher with PRP than with VEGF-111. These results were already noticed from day 5 onwards. Conclusion: This experimentation has shown that both PRP and VEGF-111 injections stimulated tendon healing process as suggested by the increased force needed to break tendons during its healing process. Furthermore, this acceleration of the cicatrisation process was more significant with PRP than with VEGF-111. This could be explained by the release from platelets of a “cocktail” of growth factors acting in synergy on the healing process. Acknowledgement This experimentation was partially financed by “Standard de Liège 2007” and “Lejeune-Lechien 2008” grants. [less ▲]

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See detailInternational Trade of Nuclear Materials and Equipment
Michel, Quentin ULiege

Conference (2010, March 19)

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See detailLa Recherche à l'ULg
Cormann, Grégory ULiege

Conference (2010, March 19)

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See detailEtalement urbain et services collectifs
Halleux, Jean-Marie ULiege

Conference (2010, March 18)

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See detailControl and Voting Power in Shareholding Networks
Crama, Yves ULiege

Conference (2010, March 18)

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See detailTargeting nanoparticles to M cells with non-peptidic ligands for oral vaccination
Freichels, Hélène ULiege; Fievez, Virginie; Plapied, Laurence et al

Poster (2010, March 18)

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See detailMechanical testing of single electrospun PCL fibers by AFM
Croisier, Florence ULiege; Duwez, Anne-Sophie ULiege; Jérôme, Christine ULiege et al

Poster (2010, March 18)

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See detailWhat’s being Integrated into what (and by whom)?
Grossman, Eitan; Polis, Stéphane ULiege

Conference (2010, March 18)

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See detailMagnetic hybrid based on iron oxide nanoparticles and thermoresponsive block copolymer for biomedical applications
Sibret, Pierre ULiege; Aqil, Abdelhafid; Zhao, J. et al

Poster (2010, March 18)

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See detailWalt Disney, une auto-canonisation
Tomasovic, Dick ULiege

Conference (2010, March 17)

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