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See detailO-ARM Symposium
Martin, Didier ULg

Conference (2008, November 14)

Detailed reference viewed: 20 (2 ULg)
See detailCocaïne: Détermination du délai entre le prélèvement et la consommation
De Backer, Benjamin ULg

Conference (2008, November 14)

Detailed reference viewed: 20 (6 ULg)
See detailJules Claskin: l'homme
Baiwir, Esther ULg

Conference (2008, November 13)

Detailed reference viewed: 14 (2 ULg)
See detailLes instruments de la fiscalité environnementale
Bourgeois, Marc ULg

Conference (2008, November 13)

Detailed reference viewed: 23 (0 ULg)
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See detailNatural equivariant quantizations
Radoux, Fabian ULg

Conference (2008, November 12)

Detailed reference viewed: 8 (4 ULg)
See detailEffect of climate change on flood risk along river Ourthe
Dewals, Benjamin ULg; Ernst, Julien ULg

Conference (2008, November 12)

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See detailEffect of climate change on flood risk along river Ourthe
Dewals, Benjamin ULg; Ernst, Julien ULg; Pirotton, Michel ULg

Conference (2008, November 12)

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Peer Reviewed
See detailRobust detection of outlying serum protein electrophoretic profiles in External Quality Assessment schemes
Zhang, Lixin ULg

Conference (2008, November 12)

External Quality Assessment (EQA) schemes are national programmes to ensure that results obtained on a particular specimen in a given clinical laboratory are compatible with those obtained by other ... [more ▼]

External Quality Assessment (EQA) schemes are national programmes to ensure that results obtained on a particular specimen in a given clinical laboratory are compatible with those obtained by other laboratories on the same specimen. EQA schemes are traditionally facing the problem of outlier detection of single analytes, e.g., glucose or cholesterol. Recently, serum protein electrophoresis was tested to be subsequently implemented on a regular basis in EQA programmes. This is a laboratory test which consists of five fractions (albumin, α1, α2, β and γ globulins) and the sum of them is equal to 100% of total proteins. So far, in EQA the five fractions have been analyzed separately as for the univariate analytes, without considering the correlation and the linear relationship between them. The minimum covariance determinant (MCD) estimator (Rousseeuw and van Driessen 1999) provides an interesting robust approach to analyze EQA electrophoresis results from a global standpoint. This talk focuses on comparing the results obtained by the traditional univariate approach and the robust MCD approach (Zhang et al. 2008). As illustrated on electrophoretic data from the Belgian EQA scheme, the MCD approach improves the detection of poor performing laboratories. Simple graphical representation of the outliers will be demonstrated at the end of the talk. [less ▲]

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See detailPharmacology of tiludronate in horses
Delguste, Catherine ULg

Conference (2008, November 08)

Detailed reference viewed: 12 (1 ULg)
Peer Reviewed
See detailCognitive and affective mechanisms involved in hallucination-proneness
Laroi, Frank ULg

Conference (2008, November 08)

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See detailFollow-up on EUCAST
MELIN, Pierrette ULg

Conference (2008, November 06)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailDu sensible au politique : vers une nouvelle approche de l’environnement sonore
Colon, Paul-Louis ULg

Conference (2008, November 06)

Cette communication tente de montrer l’importance d’une étude de la perception ordinaire pour la compréhension des pratiques et des représentations qui organisent l’environnement vécu, en s’attachant plus ... [more ▼]

Cette communication tente de montrer l’importance d’une étude de la perception ordinaire pour la compréhension des pratiques et des représentations qui organisent l’environnement vécu, en s’attachant plus particulièrement à sa dimension auditive. A partir d’une réflexion sur la notion de bruit, une série d’approches de l’environnement sonore aux fondements épistémologiques contrastés seront identifiées. Une interrogation sur les rapports entre perception et politique sera menée à partir de la présentation critique d’un ensemble de recherches issues de la sociologie du quotidien. Des conclusions méthodologiques et épistémologiques pour le prolongement du travail de recherche sur cette question seront finalement dégagées. [less ▲]

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Peer Reviewed
See detailVenture Creation Intentions and the Seasons of Adult Development
Heuer, Annamaria ULg; Surlemont, Bernard ULg

Conference (2008, November 06)

Objectives: The objective of the paper is to identify the potential impact of different forms of aging (e.g. biological, psychological and psychosocial aging) on entrepreneurial intention. Thus, the key ... [more ▼]

Objectives: The objective of the paper is to identify the potential impact of different forms of aging (e.g. biological, psychological and psychosocial aging) on entrepreneurial intention. Thus, the key focus will be on aging-related changes of attitudes, subjective norms and feasibility perceptions and their influence on intention. Prior work: Numerous studies have applied cognition research-based models to understand the factors that impact entrepreneurial intentions (e.g. Davidsson, 1995; Kolvereid, 1996; Krueger, Reilly and Carsrud, 2000; Autio et al., 2001; Douglas and Shepherd, 2002; Kristiansen and Indarti, 2004). Most scholars, however, have conducted their studies on university students (e.g. Van Gelderen et al., 2006). This choice is mostly motivated by an easier access to data. As a consequence, this may have introduced a bias that underestimates the potential influence of life-stage-related differences on entrepreneurial intention. Approach: The paper will present a literature review of the theories that look at the impact of aging on career intentions (for instance, Lévesque and Minniti, 2006; Ornstein et al., 1989). The approach is to start on the structure of the intentions model (Ajzens’ Theory of Planned Behaviour) as a framework to integrate these pieces of research. Results: This paper is conceptual in nature, transferring important ideas of adult-development to the domain of entrepreneurship. The argumentation will show the differences in perceived desirability and feasibility are related to aging, such as high plasticity of attitude in early adulthood (e.g. Visser et al., 1998), higher change susceptibility in mid-age (Levinson, 1986; Lévesque and Minniti, 2006), and dominant self-limiting roles and decreasing willingness to bear uncertainty in the later eras (Greller, 1995; Shane, 2003). Ultimately, the paper will contribute to formulate hypotheses relating aging stages and possible drivers of entrepreneurial intention. Implications: If the drivers of entrepreneurial intention change according to age, then programmes to stimulate entrepreneurship may have to be adapted according to the target audience. If potential entrepreneurs at later stages such as the “thirties transition” are more susceptible to change, and considering that due to population aging and increasing retirement age in the western world the economic importance of “older” entrepreneur’s is likely to increase, why not stimulate them more? Value: To date, there have only been sporadic, short argumentations for aging-related changes of intentional antecedents. We fill this gap and provide a more rigorous review of this problematic. [less ▲]

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See detailEUCAST: follow-up. What's new? What will happen in 2009
Melin, Pierrette ULg

Conference (2008, November 06)

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See detailIntegrating Succession and Gender Issues from the Perspective of the Daughter of Family Enterprise across the U.S. and EU
Constantinidis, Christina ULg; Nelson, Teresa

Conference (2008, November 04)

We engage a gender analysis, including consideration of the social phenomena of separation and hierarchy, to consider the role, condition and aspirations of daughters of family enterprise. From this ... [more ▼]

We engage a gender analysis, including consideration of the social phenomena of separation and hierarchy, to consider the role, condition and aspirations of daughters of family enterprise. From this perspective we examine the extant literature and present findings from two exploratory empirical research efforts, one in the EU and one in the U.S., to better understand how daughters perceive their leadership paths in the family business internationally. We take into consideration growing social acceptance of women’s leadership, and women’s own career-mindedness, which influence traditional views of the opportunities for daughters inside and outside of the family business. Research avenues and practical recommendations to support successful succession of daughters are discussed. [less ▲]

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Peer Reviewed
See detailTable ronde : La myélopathie cervicarthrosique.
Martin, Didier ULg

Conference (2008, November 02)

Detailed reference viewed: 22 (1 ULg)
Peer Reviewed
See detailLeadership et genre : une réalité multiculturelle ?
Cornet, Annie ULg; Bonnivert, S.

Conference (2008, November)

Detailed reference viewed: 89 (17 ULg)
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See detailGalileo Local Component for the detection of atmospheric threats
Warnant, René ULg; Wautelet, Gilles ULg; Lejeune, Sandrine et al

Conference (2008, November)

Detailed reference viewed: 26 (7 ULg)
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See detailDEVELOPMENT OF A CAPE-OPEN 1.0 SOCKET
Radermecker, Eric; Wising, Ulrika; Dumont, Marie-Noëlle ULg

Conference (2008, November)

Detailed reference viewed: 6 (1 ULg)
Peer Reviewed
See detailCaractère bifonctionnel d'une prényltransférase de pucerons
Cusson, Michel; Vandermoten, Sophie ULg; Charloteaux, Benoit et al

Conference (2008, November)

Detailed reference viewed: 7 (1 ULg)
See detailKuzey Anadolu Fayı Üzerinde Yer Alan Sığ Göllerde Tarihsel Depremlerin Sedimantolojik İzlerinin Araştırılması
Avsar, Ulas; Boes, X; Hubert, Aurelia ULg et al

Conference (2008, November)

Detailed reference viewed: 9 (1 ULg)
See detailA West Florida Shelf ROMS model nested in HYCOM: validation, application and data assimilation
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Zheng, L. et al

Conference (2008, November)

A high-resolution regional model for the West Florida Shelf based on ROMS is nested into the GODAE Atlantic and Global HYCOM models. The benefit of using HYCOM boundary conditions instead of climatology ... [more ▼]

A high-resolution regional model for the West Florida Shelf based on ROMS is nested into the GODAE Atlantic and Global HYCOM models. The benefit of using HYCOM boundary conditions instead of climatology is established by comparing the nested model to altimetry, in situ temperature time series, andADCP and high-frequency (HF) radar currents. Jointly with the Fish and Wildlife Research Institute, the model is applied to assist in harmful algae bloom forecasts. The model currents are used to estimate the trajectories of water parcels where red tide organisms have been detected. This system has been able to simulate the onset of the 2005 red tide event. HF Radar Currents are assimilated to improve the shelf circulation. An ensemble simulation of the WFS ROMS model is carried out under different wind forcings in order to estimate the error covariance of the model state vector and the covariance between ocean currents and winds. Radial currents measured by HF Radar antennas near St. Petersburg and Venice, FL, are assimilated using this ensemble-based error covariance. Different assimilation techniques using a time-average ensemble, a filter to reduce surface gravity waves and an extended state vector including wind stress were tested. Results of WFS ROMS model assimilating surface currents show an improvement of the model currents not only at the surface but also at depth. This model is run daily, to provide forecasts for the next 3.5 days. The model predictions and validations are available at http://ocgweb.marine.usf.edu under "WFS Model Forecasts". [less ▲]

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See detailLa modernisation de l'administration publique : gérer le changement par/avec/malgré les identités ?
Rondeaux, Giseline ULg

Conference (2008, November)

Au sein de la problématique de la modernisation de l’administration publique, notre propos s’intéresse à l’existence de liens entre un processus de réforme mis en oeuvre dans une administration, et les ... [more ▼]

Au sein de la problématique de la modernisation de l’administration publique, notre propos s’intéresse à l’existence de liens entre un processus de réforme mis en oeuvre dans une administration, et les identités organisationnelles des membres de cette organisation. De tels changements entraînent indubitablement une transformation de multiples aspects de l’administration, tels que ses modes d’organisation, sa politique de GRH, sa manière de concevoir et de remplir ses missions, ses structures, ses référents, etc. Cette transformation suppose la valorisation de modes de fonctionnement, de valeurs et de compétences différents, et a pour résultat un bouleversement de l’identité organisationnelle et des identités professionnelles des membres de cette organisation (Fu et al., 1999; Abrams & Hogg, 1987). Notre objectif est de comprendre et décrire de quelle manière les identités évoluent à la suite de l’introduction de ces nouveaux principes et pratiques dans le contexte de l’administration publique. A partir de données collectées durant deux ans au sein d’un ministère fédéral belge, nous postulons que l’introduction d’une réforme inspirée du New Public Management entraîne une hybridation des logiques identitaires au sein de l’administration publique, mais que par ailleurs, le cours de cette réforme a pu être influencé, à terme, par les logiques identitaires en présence. Au moyen d’une analyse qualitative longitudinale, nous proposons de distinguer 7 profils identitaires, caractérisés par la référence à une logique identitaire (logique de service public, de managérialisme public ou de pragmatisme) et leur positionnement par rapport à leur perception du contexte (congruence ou dissonance). Au travers de notre étude de cas, notre hypothèse d’une co-structuration des identités organisationnelles et du processus de réforme de l’administration nous apparaît comme validée, ainsi qu’en témoigne l’hybridation des logiques identitaires en présence au sein de l’administration étudiée. Nos résultats nous permettent ainsi de supposer une modification des repères identitaires à la suite de la réforme, mais également une réinterprétation de cette réforme au travers du filtre des identités. Notre approche longitudinale révèle par ailleurs les dynamiques identitaires, en identifiant notamment les processus de shift d’un profil à l’autre, et nous conduit à proposer un modèle des dynamiques identitaires contextualisé. Nous sommes également en mesure de montrer quels facteurs produisent (ou sont susceptibles de produire) des shifts identitaires, et le positionnement de chaque profil identitaire à l’égard du changement (1) tel qu’il est vécu et (2) de manière projective. Les facteurs influençant le shift d’un profil identitaire à l’autre sont étroitement liés au concept de motivation. Plusieurs études ont en effet montré la portée de la congruence identitaire (ou identification) sur la construction de l'implication organisationnelle et ses impacts sur les attitudes et comportements des membres de l'organisation, telles que le turnover, la satisfaction, l’implication, la coopération, ou encore l'acceptation du changement (Foreman et Whetten, 2002 ; Ashforth et Mael, 1989 ; Dutton et al. 1994 ; Reger et al., 1998). Ces résultats peuvent conduire à divers prolongements managériaux. En effet, les résultats de notre analyse mettent en évidence l’ampleur des obstacles que les problématiques identitaires peuvent constituer face au changement. Ils font également apparaître des leviers potentiels de changement. Dans la mesure où ils auront pu être identifiés, ces éléments peuvent ultérieurement constituer une base pour le développement d’une approche, de méthodes voire d’outils relatifs à la gestion du changement : utiliser les identités organisationnelles comme indicateur clé voire comme levier de changement. De plus, la diversité des profils identitaires, et leur évolution, amène aussi à réfléchir à des actions managériales différenciées, suivant l’idée qu’il n’existe pas un seul modèle de réduction de la dissonance, et que les leviers à mobiliser pour favoriser la congruence sur le plan identitaire dans un contexte de changement varieront d’un profil à l’autre. Enfin, l’approche interprétative proposée par notre modèle analytique pourrait servi de base pour le développement d’outils de gestion pour encadrer et accompagner les processus de changement au sein d’une organisation. [less ▲]

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See detailStructure and evolution of a main segment boundary along the East Anatolian fault, Turkey 2008
Garcia-Moreno, D.; Hubert, Aurelia ULg; Moernaut, J et al

Conference (2008, November)

Detailed reference viewed: 7 (3 ULg)
See detailAnalysis of the Skyros pony breed: population structure and genetic variability
Bömcke, Elisabeth ULg; Gengler, Nicolas ULg

Conference (2008, November)

Due to its geographic location, Greece is a crossroad between three continents and its mountainous landscape and numerous islands have lead to the creation of many small populations of distinct and ... [more ▼]

Due to its geographic location, Greece is a crossroad between three continents and its mountainous landscape and numerous islands have lead to the creation of many small populations of distinct and isolated breeds. On the basis of phenotypes and genotypes, seven native breeds were identified. The Skyros pony has a distinct phenotype from those of other breeds. This phenotypic difference seems to be linked to the fact that the Skyros pony is less genetically similar to the other Greek breed than the other breeds are to each other as shown in previous studies. Furthermore, the Skyros pony breed risk status is described as endangered according to the criteria of the Food and Agricultural Organization (DAD-IS). The main reason is that the population is concentrated only in three herds of reduced size. This study analyses the population structure and describes the genetic variability of the breed using 15 microsatellite markers and available genealogical information. The molecular characterization and the pedigree were also used to investigate the presence of bottleneck. Factorial correspondence analysis and analysis of molecular variance showed that the three herds seemed to be genetically distinct even if the genetic variance between herds was low (5.75%). For the whole population, the mean total number of allele per locus was 5.93. The average Polymorphism Information Content value was relatively high (~ 0.60) as the observed heterozygosity (0.64) and the expected heterozygosity (0.62). The comparison with other studies showed that these values were well within the range for domestic horses but were at the lower end of that range, i.e. with the values from breeds with small population size or recent bottlenecks. However, these values indicated a still substantial genetic diversity in the Skyros breed that could be useful for planning future breeding strategies for the breed conservation. This is consistent with the results of various bottleneck tests, which detected no evidence of bottleneck when considering the whole population but suggested that there was bottleneck in two of the three main herds of Skyros pony. Comparisons between DNA-based and pedigree-based results showed that the loss of genetic diversity has probably occurred before the beginning of breed registration. [less ▲]

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See detailDevelopment of a strategy to study toxicodynamic of pollutants in spawning sea turtles from French West Indies (Guadeloupe and Martinique)
Dyc, Christelle ULg; Debier, Cathy; Thomé, Jean-Pierre ULg et al

Conference (2008, November)

Sea turtles including the green turtle Chelonia mydas and the hawksbill turtle Eretmochelys imbricata are critically endangered species, facing different factors as marine pollution. There is a blatant ... [more ▼]

Sea turtles including the green turtle Chelonia mydas and the hawksbill turtle Eretmochelys imbricata are critically endangered species, facing different factors as marine pollution. There is a blatant lack of data dealing with toxicants such as metals and persistent organic pollutants (POPs) in sea turtles. We developed a strategy to apprehend levels, effects and transfer to offspring of several pollutants in sea turtles. Sampling of blood, subcutaneous tissue and eggs of 15 gravid C. mydas and E. imbricata was carried out between July and September 2008 in Martinique (Diamant’s beach) and Guadeloupe (Petite Terre and Marie-Galante). Blood was collected from the dorso-cervical sinus and subcutaneous tissue was sampled in shoulder of the spawning females using a 5 mm biopsy punch (Kai Europe GmbH, Germany). Total blood and serum were successfully taken for metal, POP and biomarker investigations. T-mercury was analyzed by DMA milestones while PCBs, DDT and chlordecone were analyzed by EDC Ni63 high performance gas chromatography HPLC. Samples of serum were analyzed for vitamins (A and E) by HPLC and for thyroid hormones (triiodothyronine and thyroxine) by radioimmunoassay. In parallel to this field study, a cell model using 3T3-L1 cell line was built up to test in vitro effects of PCBs and mercury as well as the relationship between in vitro exposure and fat mobilization. Preliminary results showed a dose-response relationship between increased Aroclor 1234 and 1252 concentrations (0.5 ppb, 1 ppb and 1.5 ppb) and adipocyte mortality (Nucleocounter). The strategy we propose here will bring further insights on levels and potential impact of pollutants on female sea turtles and their offspring. [less ▲]

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See detailA droplet of spectroscopy
Terwagne, Denis ULg; Gilet, Tristan ULg; Vandewalle, Nicolas ULg et al

Conference (2008, November)

Droplet coalescence in a liquid bath can be delayed by oscillating the surface of the bath vertically (frequency from 20 Hz to 400 Hz), the droplet bounces on the interface [1,2]. A low viscous oil ... [more ▼]

Droplet coalescence in a liquid bath can be delayed by oscillating the surface of the bath vertically (frequency from 20 Hz to 400 Hz), the droplet bounces on the interface [1,2]. A low viscous oil droplet is dropped on a high viscous oil bath. We observe that the conditions for bouncing depends on the frequency, more precisely we observe resonance when the eigenfrequency of the droplet is excited. In some conditions, droplet presents a non axi-symmetric mode of deformation. That leads to a rotation of the drop and to a horizontal displacement. [less ▲]

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See detailSeismic patterns of the Anatolian fault system (Turkey)
Hubert, Aurelia ULg; Fraser, J.; Boes, X et al

Conference (2008, November)

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See detailDefect growth in model panel paintings by full field interferometry
Kouloumpi, E.; Moutsatsou, A.; Torres, L. et al

Conference (2008, November)

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See detailEnjeux et conflits autour de la mobilisation du passé dans les régimes démocratiques
Grandjean, Geoffrey ULg

Conference (2008, November)

This presentation aims to show some stakes and conflicts when past is mobilized in democracies

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See detailInterférométrie holographique photoréfractive : nouveaux développements et applications récentes
Thizy, Cédric ULg; Georges, Marc ULg; Hustinx, Guy-Michel et al

Conference (2008, November)

Les cristaux photoréfractifs permettent l'enregistrement holographique dynamique in-situ et une réutilisabilité infinie. Aussi ils possèdent des propriétés spécifiques que d'autres matériaux ... [more ▼]

Les cristaux photoréfractifs permettent l'enregistrement holographique dynamique in-situ et une réutilisabilité infinie. Aussi ils possèdent des propriétés spécifiques que d'autres matériaux holographiques n'ont pas et qui peuvent être utilisées de manière avantageuse en interférométrie holographique. Depuis 15 ans, le CSL développe des techniques d'interférométrie holographique et des instruments basés sur des cristaux de Bi12SiO20 (BSO). Le comportement dynamique de ces derniers permet une grande souplesse d'utilisation de l'interférométrie holographique, à l'instar des techniques basées sur l'enregistrement numérique, tout en fournissant des interférogrammes de meilleure résolution que celles-ci (pas de bruit de speckle, pas de filtrage nécessaire). Par le passé, nous avons déjà présenté une large gamme d'applications en métrologie, contrôle non destructif et mesures vibratoires. Ici nous présentons des applications industrielles récentes obtenue avec une caméra holographique photoréfractive commercialisée. Cette dernière a été utilisée avec succès dans des applications très demandeuses, notamment en terme de résolution. [less ▲]

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See detailEtude de la technique LIBS en vue du tri des vitrocéramiques dans les déchets verriers
Georges, Marc ULg; Carapelle, Alain ULg; Mombaerts, Johan et al

Conference (2008, November)

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See detailCoherent metrology in impact assessment of movable artwork: the MULTIENCODE project
Tornari, V.; Bernikola, E.; Osten, W. et al

Conference (2008, November)

Detailed reference viewed: 29 (0 ULg)
See detailDetermination of the tortuosity of porous materials from binary or grey-tone tomographic reconstructions
Gommes, Cédric ULg; Almazan, Maria del Carmen; Léonard, Angélique ULg et al

Conference (2008, November)

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See detailTrophic diversity among amphipod crustaceans from Posidonia oceanica meadows : A stable isotope assessment
Michel, Loïc ULg; Lepoint, Gilles ULg; Gobert, Sylvie ULg et al

Conference (2008, October 31)

Vagile invertebrates are regarded as key-components of Posidonia oceanica meadow ecosystems, particularly in organic matter transfers from primary producers to higher level consumers. Among these ... [more ▼]

Vagile invertebrates are regarded as key-components of Posidonia oceanica meadow ecosystems, particularly in organic matter transfers from primary producers to higher level consumers. Among these invertebrates, amphipod crustaceans are one of the most abundant and diverse groups, and probably play an important role in meadow ecosystem functioning. However, their trophic ecology is poorly known, and these crustaceans are generally regarded as vegetal epiphytes consumers or generalist detritivores, due to the lack of accurate studies. Here, we focused on the study of the interspecific trophic diversity, and on the importance of other food sources (Posidonia leaves and litter, animal epiphytes, suspended particular organic matter, …) in those amphipods’ diet. To assess these phenomena, we used stable isotopes ratios of carbon and nitrogen as trophic tracers. It appears that, while some species (such as Apherusa chiereghinii and Aora spinicornis) seem to feed mainly on epiphytes, others, like Dexamine spiniventris, exploit different food sources. These results thus tend to show that amphipod trophic diversity could have been underestimated in the past. Moreover, they enhance the comprehension of the feeding ecology of these animals, and therefore of the way they interact with the Posidonia meadow ecosystem. [less ▲]

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See detailHelping Teachers Gain Autonomy in Online Course Design and Implementation
Van de Poël, Jean-François ULg; Lecomte, Béatrice ULg

Conference (2008, October 31)

We consider that providing a variety of flexible services and access to resources and training is one of the keys to helping teachers gain autonomy in the design and implementation of an online course. So ... [more ▼]

We consider that providing a variety of flexible services and access to resources and training is one of the keys to helping teachers gain autonomy in the design and implementation of an online course. So far, our system has helped initiate 176 online courses over the past two years. [less ▲]

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See detailNew insights in mammalian auditory organ development
Thelen, Nicolas ULg; Malgrange, Brigitte ULg; Thiry, Marc

Conference (2008, October 30)

Although the structure of the auditory organ in mature mammals, the organ of Corti, is clearly established, its development is far from being elucidated. Using cytochemical and immunohistochemical methods ... [more ▼]

Although the structure of the auditory organ in mature mammals, the organ of Corti, is clearly established, its development is far from being elucidated. Using cytochemical and immunohistochemical methods at the light and electron microscope levels, we examined its spatiotemporal development in rats from embryonic day 16 (E16) to E19. At E16, whatever the region of the cochlear studied (base, middle, apex), the organ of Corti was not present. We demonstrate that the organ of Corti develops from a non-proliferative cell zone that is located in the junctional region between the greater epithelial ridge and the lesser epithelial ridge of the cochlear duct and that is characterized by the presence of numerous microvilli. Using the periodic acid-thiocarbohydrazide-silver proteinate method, we revealed that the first cells to develop in this zone are the inner pillar cells, a particular type of nonsensory supporting cells. They arise in the base of the cochlear duct at the boundary between the two ridges at E16. The cell differentiation in this prosensory region continues according to a base-to-apex gradient, the inner hair cells appearing in the greater epithelial ridge at E17 and the outer hair cells in the lesser epithelial ridge at E18. At E19, all the different cell types of the organ of Corti are well in place. We also showed that the development of the inner pillar cells within the prosensory region does not involve Notch1 signaling. These results highlight the central role that the inner pillar cells could play in the development of the organ of Corti. [less ▲]

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See detailLes identités d'après la théorie des discours (Laclau, Mouffe)
Spinoy, Erik ULg

Conference (2008, October 29)

This papers presents the way identity/difference is conceived of in discourse theory, and especially in the work of Ernesto Laclau and Chantal Mouffe.

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See detailEnvironment and forced migration: a policy-relevant research approach
Gemenne, François ULg

Conference (2008, October 28)

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See detailStimuli-responsive surfaces by electrografting
Jérôme, Christine ULg

Conference (2008, October 28)

The design of stimuli-responsive coatings on a variety of solid surfaces is the topic of increasing researches. In this area, the adhesion of a stimuli-responsive polymer to the inorganic support whatever ... [more ▼]

The design of stimuli-responsive coatings on a variety of solid surfaces is the topic of increasing researches. In this area, the adhesion of a stimuli-responsive polymer to the inorganic support whatever the conditions of pH and temperature, remains a concern. In this field, we have been studying an electrochemical process able to initiate the polymerization of acrylic derivatives together with promoting their chemisorption to the substrate used as electrode. We have demonstrated the versatility of this method that can be applied to a variety of acrylics leading to the possible generation of responsive coatings to either pH or temperature. Reversible anchoring of molecules of interest has also been achieved recently by this method based on the grafting of dienes able to bind a dienophile and release it at higher temperature by retroDiels-Alder reaction. The electroinitiation has been found compatible with a variety of surfaces going from conventional metals (iron, steel, gold) to carbon (fibers and nanotubes) and semi-conductors (doped-silicon), which spreads the applications to various fields such as medical devices, biosensors, catalysis, electronics and photovoltaics. Particularly, the application of this process to AFM tips allows the straightforward functionalization of these devices allowing not only the handling of polymers at the molecular level but also the elaboration of various temperature, pH or analyte sensitive sensors at the nanometer scale. [less ▲]

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See detailL'ambigua vitalità del personaggio d'Annunzio
Benzoni, Pietro ULg

Conference (2008, October 24)

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See detailL’hémorragie cérébrale : le coup de tonnerre dans un ciel serein
Martin, Didier ULg

Conference (2008, October 23)

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See detailNa et K anormaux : A quoi faut-il penser?
Krzesinski, Jean-Marie ULg

Conference (2008, October 23)

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See detailImportance of pigtailed macaques (Macaca nemestrina leonina) in seed dispersal: Impact on the ecological balance of the tropical rainforest at Khao Yai National Park, Thailand
Albert, Aurélie ULg; Huynen, Marie-Claude ULg

Conference (2008, October 22)

The tropical rain forest is maintained thanks to a precarious balance placed under the yoke of interactions between the various animal and plant species which compose it. Among them we can find those ... [more ▼]

The tropical rain forest is maintained thanks to a precarious balance placed under the yoke of interactions between the various animal and plant species which compose it. Among them we can find those implying plants and frugivores. Today, no study was still undertaken on the pigtailed macaques (Macaca nemestrina leonina) because they are considered seed predator. However, recent studies showed that it could actually be a key-species in the dispersion of many plant species. The study will take place in the Khao Yai National park (2,168 km²), Thailand. We will follow a troop of forty individuals habituated to humans and already well-known. Our goal will be to establish the importance of the pigtailed macaques in the maintenance and the regeneration of the tropical rain forest. Thus we will try to evaluate their capacity of being good seed dispersers. In this purpose we will study: 1) the spatiotemporal distribution, the productivity and the characteristics of the plant species present on the home range of the studied troop, 2) the ranging patterns of the macaques within their home range, 3) their feeding behaviour, notably the fruit selection and the various modes of processing seeds, and finally 4) their impact on the viability and the germination potential of seeds. The study of seed dispersal by these macaques would enable us to step further into the understanding of this environment and, perhaps, to improve the destiny of the pigtailed macaques, species now characterized as “vulnerable”, in recognizing them a paramount role in the conservation of their habitat. [less ▲]

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See detailDebates on osteoporosis management
Bruyère, Olivier ULg

Conference (2008, October 18)

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See detailPratique de la pharmacie clinique: Expérience en Gériatrie
Van Hees, Thierry ULg

Conference (2008, October 18)

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See detailAbout the regularity and the irregularity of some nondi erentiable functions
Nicolay, Samuel ULg

Conference (2008, October 17)

We study the Hoelder regularity of some "historical" nondifferentiable functions

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See detailLes capacités, un nouvel étalon pour évaluer les inégalités ?
Orianne, Jean-François ULg; Verhoeven, Marie

Conference (2008, October 17)

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See detailDroits, base informationnelle et action publique
De Munck, Jean; Orianne, Jean-François ULg; Salais, Robert

Conference (2008, October 17)

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See detailVacillating between the Universal and the Particular
Spinoy, Erik ULg

Conference (2008, October 17)

This paper discusses the recent trend to privilege the particular over the universal, and points out that, while it is true that all universality is 'stained' by the particular, the particular itself is ... [more ▼]

This paper discusses the recent trend to privilege the particular over the universal, and points out that, while it is true that all universality is 'stained' by the particular, the particular itself is unthinkable without a reference to the universal. This is exemplified by a number of cases from philosophy, cultural theory and literature. [less ▲]

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See detailEvaluation subjective de la voix (VHI) chez 723 enseignants en région Bruxelloise.
Morsomme, Dominique ULg; Russel, Sophie; Jamart, Jacques et al

Conference (2008, October 14)

Les études montrent qu’en moyenne 20% des enseignants présentent des troubles vocaux. Les auteurs relèvent des symptômes fréquents comme la raucité, la fatigue vocale, l’aggravation de la voix, les ... [more ▼]

Les études montrent qu’en moyenne 20% des enseignants présentent des troubles vocaux. Les auteurs relèvent des symptômes fréquents comme la raucité, la fatigue vocale, l’aggravation de la voix, les douleurs péri-laryngées et la sensation d’inconfort physique. Ils rapportent que la dysphonie est plus fréquente chez les femmes. L’âge, le nombre d’années d’expérience, le type de cours enseigné les facteurs environnementaux, l’abus, le malmenage vocal et le stress ont un impact sur la voix. Ces facteurs amenuisent les performances vocales professionnelles des enseignants et ont des conséquences non négligeables en terme d’économie. Dans notre étude, nous avons évalué la voix de 723 enseignants (F :634/ H :89), exerçant en écoles ordinaires ou en écoles à discrimination positive, à l’aide du VHI. Nous avons établi un premier état des lieux dans 15 communes de la région bruxelloise. Des mesures de fiabilité, de pertinence et de cohérence ont été réalisées. Nous obtenons une bonne fiabilité test-retest (F : 0,774 ; E : 0.749 ; P : 0.806 ; G : 0.836 – p>0.001 pour tous). Les scores du re-test sont significativement inférieurs pour les 3 sous-échelles (F p<0.001 ; E p=0.003 et P p<0.001) et le score global (p<0.001). La corrélation entre les 3 sous échelles est élevée (FvsE : 0.434 ; FvsP :0.455 ; EvsP : 0.527). La prévalence des troubles vocaux a été calculée en tenant compte des variables antécédents ORL, logopédiques et des traitements logopédiques en cours. Elle s’élève à 10,5%. Les enseignants ayant été confronté à une difficulté vocale (vu par un ORL ou/et un logopède) présentent donc des scores plus élevés au VHI global. Par contre, nous observons que plus les sujets sont âgés et ont de l’expérience moins ils ont de troubles vocaux (p=0.026 et p=0.013). De même, les variables telles que le genre (p≥ 0.063), la matière enseignée (p≥ 0.468), le fait de fumer (p=0.757), le type (p≥ 0.867) et le degré d’enseignement (p≥ 0.212) n’influent pas de manière significative les scores aux V.H.I. [less ▲]

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See detailNASS Congress
Martin, Didier ULg

Conference (2008, October 14)

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See detailApport de la caméra à haute vitesse en comparaison avec la stroboscopie.
Remacle, Marc; Morsomme, Dominique ULg

Conference (2008, October 14)

Introduction:La stroboscopie est indispensable au bilan des troubles de la voix affectant les cordes vocales. Elle est toutefois basée sur la reconstitution d'une image de représentant pas la réalité. Sur ... [more ▼]

Introduction:La stroboscopie est indispensable au bilan des troubles de la voix affectant les cordes vocales. Elle est toutefois basée sur la reconstitution d'une image de représentant pas la réalité. Sur ce plan la caméra à haute vitesse permettant d'observer des cycles vibratoires réels lui est supérieure. Les problèmes techniques: coût, stockage et traitements des images .. n'ont pas permis sa diffusion et son emploi en phoniatrie clinique.Nous présentons la comparaison des enregistrements obtenus avec la caméra à haute vitesse Wolf avec ceux acquis avec le stroboscope (strobobase) de la même firme.Matériels et méthodes: La caméra à haute vitesse Wolf (Knittlige, Allemagne) permet d'enregistrer des séquences de 2 sec soit de 4000 ou de 2000 images/s. L'enregistrement est en couleur. L'examinateur peut choisir parmi ces 2 sec une séquence pertinente pour stockage dans le disque dur et analyse complémentaire. Les analyses complémentaires sont essentiellement la kimographie et la mesure de l'écartement du bord libre des cordes vocales au cours de la séquence. Cette dernière mesure est traduite de manière graphique, évoquant l'électroglottographie. La mesure est faite simultanément à la partie antérieure médiane et postérieure des cordes vocales. Le strobosbase est basé sur un système de shutter activé classiquement par un microphone de contact. Trente cinq patients représentant l'ensemble de la pathologie bénigne des cordes vocales ont été enregistrés successivement avec les deux systèmes. La qualité de l'image, la contribution au diagnostic et au traitement ont été observées avec les deux systèmes. Résultats: Dans tous les cas, la qualité de l'image stroboscopique est nettement supérieure à celle de la caméra à haute vitesse. Celle-ci ne disposant pas d'assez de pixels. Dans aucun cas la caméra à haute vitesse n'a modifié le diagnostic. La caméra à haute vitesse apporte toutefois des renseignements supérieurs à la stroboscopie en cas de béance glottique (paralysie, encoche, presbyphonie, ...). Grâce à la kymographie et à l'analyse de l'écartement des cordes vocales. Sur dix sept cas de béances glottiques, la décision thérapeutique a été modifiée 4 fois après examen à la caméra à haute vitesse. Discussion: La caméra à haute vitesse de modèle Wolf ne peut remplacer la stroboscopie dans l'état présent. Elle est un complément utile pour l'étude des béances glottiques en permettant une meilleure observation des phases d'ouverture et de fermeture. Elle contribue ainsi à la décision thérapeutique. Le choix subjectif d'une séquence parmi les deux enregistrées peut être un biais important. [less ▲]

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See detailALADDIN performance model
Absil, Olivier ULg

Conference (2008, October 13)

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See detailFrom Bio to Nano: Learning From The Past to Shape the Future of Technology Assessment
Delvenne, Pierre ULg; Fallon, Catherine ULg; Thoreau, François ULg et al

Conference (2008, October 12)

In many Western countries over the last 35 years, the quest for more scientific governance on <br />crucial technological issues led to a broadening of the political world’s sphere of competences. <br ... [more ▼]

In many Western countries over the last 35 years, the quest for more scientific governance on <br />crucial technological issues led to a broadening of the political world’s sphere of competences. <br />Indeed, various countries decided that dealing with global, invisible, irreversible and irreparable <br />risks had to be handled by an appropriate tool of management of technological innovations. So the <br />usefulness to institutionalize parliamentary Technology Assessment (PTA) offices emerged. <br />Nowadays, PTA is an instrument particularly suitable to study the new shape of science and <br />society’s interface and it represents a remarkable attempt to reform the institutional settings of <br />innovation. <br />However, while the overall uncertainty surrounding science and technology has been used by public <br />actors like parliamentarians or ministers in the past to legitimize a first generation of PTAs, the <br />emergence of a second generation in the 1990’s – centred on the constructive, interactive or <br />participatory TA approches – emphazises the co-evolution of technology and society rather than the <br />former linear determinist rationale. In this context, the STS community of scholars is increasingly <br />called upon by the public authorities to provide a “professional service role” (RIP, 1994), that is to <br />say to take a step into action out of the border of their intellectual engagement. <br />Then, we suggest to compare two successive periods by looking at the institutional management of <br />two distinct-but-complementary technological issues: biotechnology and nanotechnology. The <br />former has been taken into account by public actors at a time when the second generation of PTAs <br />was not yet rooted in the political practices. Thus, the management of the public debate related to <br />biotechnology has been characterized by a lack of sensitive, fruitful and interactive communication <br />between the stakeholders involved in the TA process, while the first applications were already being <br />commercialized. On the other hand, the latter is currently being tackled at a moment when the social <br />shaping of technology is widely acknowledged as well as the STS community may be invited to <br />pass from observation to participation in the political sphere. Given the uncertainty and complexity <br />encircling nanotechnology as well as its huge potential in many interconnected disciplinary fields, <br />the need to avoid the pitfall of the biotechnology’s experience is commonly accepted. <br />We offer to take nanotechnology as one of the most challenging technological issue to look beyond <br />the biotechnology’s roadblock and to show in which proportion the same scenario is reasonably <br />thinkable today, in order to spotlight whether we have learnt from the past in considering what is <br />1 <br />sometimes called “a new industrial revolution”. <br />We will raise some research questions like: how different are current TA practices as compared to <br />former ones? Are there new regimes emerging? Given the current technological convergence, how <br />complicated would it be to deal with NBIC technologies if we missed the point with biotechnology <br />alone? How suitable is PTA to engage in such interdisciplinary issues? Are we assisting the <br />emergence of a third PTA generation around the growing role of the STS community? How does <br />this scientific community dialogue with the historians of science who analyzed the earlier industrial <br />revolutions? [less ▲]

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See detailIRM interventionnelle : vers une neuronavigation en temps reel
Martin, Didier ULg

Conference (2008, October 11)

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See detailTransplantation hépatique à partir de donneurs cadavériques à coeur arrêté: expérience multicentrique belge de 58 cas sur 5 ans
Detry, Olivier ULg; Rahmel, Axel; Donckier, Vincent et al

Conference (2008, October 11)

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See detailIR and UV Spectroscopy of DNA Ions Stored in Trap Instruments
Gabelica, Valérie ULg

Conference (2008, October 11)

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See detailLe diagnostic différentiel des troubles musculaires
Van Galen, Gaby ULg; Votion, Dominique ULg

Conference (2008, October 10)

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See detailLa production du fer en région liégeoise au Moyen-Age: Apport d'une analyse technologique de renforts de charpentes datées par dendrochronologie
Mertens, Anne ULg

Conference (2008, October 10)

La région liégeoise est passée à la postérité pour avoir été un des berceaux d'une mutation technique importante pour la production du fer: le développement du procédé indirect de réduction du minerai de ... [more ▼]

La région liégeoise est passée à la postérité pour avoir été un des berceaux d'une mutation technique importante pour la production du fer: le développement du procédé indirect de réduction du minerai de fer, impliquant l'élaboration dans un haut-fourneau d'une fonte riche en carbone, qui doit ensuite être affinée pour obtenir du fer. Cependant la chronologie de la diffusion de ce nouveau procédé est à l'heure actuelle encore assez mal connue, les sources textuelles se montrant plutôt discrètes quant aux détails techniques. L'apport d'une étude technique d'échantillons de fer provenant de bâtiments médiévaux, bien datés par leur contexte architectural et couvrant la période du XIIIème au XVIIème siècles, est donc envisagée ici. Cette étude a en particulier permis de détecter la production de fer par la filière indirecte dès les années 1330, soit à une date légérement antérieure aux premières mentions dans les sources écrites (datées vers 1371). [less ▲]

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See detailPrélèvement d'organes après euthanasie: expérience belge
Ysebaert, Dirk; Detry, Olivier ULg; Squifflet, Jean-Paul ULg et al

Conference (2008, October 10)

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See detailAnthropologie philosophique ou Wissenschaftslehre?
Dewalque, Arnaud ULg

Conference (2008, October 09)

Quelle place la philosophie doit-elle faire à la « question anthropologique » ou à la « question de l’homme » ? En dépit du succès incontestable de l’anthropologie philosophique dans le courant du ... [more ▼]

Quelle place la philosophie doit-elle faire à la « question anthropologique » ou à la « question de l’homme » ? En dépit du succès incontestable de l’anthropologie philosophique dans le courant du vingtième siècle, cette question est peut-être, comme on sait, plus complexe qu’il n’y paraît. Les travaux de Daniel Giovannangeli, en retraçant les médiations que l’on connaît (Kant lu par Heidegger, lui-même lu par Sartre et relu par Foucault), ont largement mis en lumière cette complexité. Sur quoi repose-t-elle ? Pourquoi l’orientation sur l’homme semble-t-elle à la fois incontournable et trop réductrice ? Je me bornerai ici à avancer une hypothèse, vers laquelle convergent, me semble-t-il, les travaux de D. Giovannangeli, et que je formulerais pour ma part de la manière suivante : le traitement philosophique de la question anthropologique est indissociable d’un problème de fondation, la philosophie se caractérisant elle-même prioritairement par une dimension fondationnelle. [less ▲]

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See detailConvective drying tests of silt: experimental studies and modelling
Gerard, Pierre ULg; Bernadino, Joao; Léonard, Angélique ULg et al

Conference (2008, October 06)

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See detailDe la cinémathèque au musée : le film exposé ou les métamorphoses du monument
Thonon, Jonathan ULg

Conference (2008, October 04)

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See detailSterile technique facts and fiction
Brichant, Jean-François ULg

Conference (2008, October 04)

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See detailOblique Object
Winand, Jean ULg

Conference (2008, October 03)

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See detailQualitative analysis of pilot selection and basic flying training.
Bertrand, Françoise ULg; Tibax, V.; Hansez, Isabelle ULg

Conference (2008, October 03)

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See detailThe unexpected hidden face of the Cephalosporin Antibiotic Ceftazidime: From biological to chemical and physical activities against oxidant species produced by phagocytes
Mouithys-Mickalad, Ange ULg; Deby-Dupont, Ginette; Mathy-Hartert, Marianne ULg et al

Conference (2008, October 03)

Background: Over several decades the use of antibiotics to treat infectious and bacterial diseases has been the main challenge. Ceftazidime (CAZ), belonging to the cephalosporin’s family, is known as ... [more ▼]

Background: Over several decades the use of antibiotics to treat infectious and bacterial diseases has been the main challenge. Ceftazidime (CAZ), belonging to the cephalosporin’s family, is known as empiric treatment for severe sepsis. Beside its antibiotic effect, CAZ has been shown to have other properties, making it unique. This study is aimed to investigate unexpected antioxidant properties of CAZ with special emphasis on the mechanism of action. Methods: Four in vitro and ex-vivo experimental models were designed 1) Assay of proteinases inhibitory activity of α2-macroglobulin (α2M) in the presence of trypsine (1.4µg) with or without 10-3 M CAZ, in 0.1 M Tris-HCl at pH 8.1. 2) Assessment of MPO-induced toxicity on endothelial cells or oxidant activities of stimulated phagocytes (PMNs) using 160 µM ferricytochrome C. 3) Effect of CAZ on two models of anoxia/reoxygenation from adherent and suspension alveolar cells (A549, 106 to 1010 cells/ml) using oxymetry coupled to EPR-spin trapping technique. 4) Cell-free systems to investigate: lipoperoxidation of linoleate induced by γ-irradiation, Fe2+/ascorbate system or ferryl species; Quenching of hydroxyl radical (·OH) and singlet oxygen (1O2)-scavenging activity from Mallet’s (H2O2/NaOCl) and Fenton’ reactions. Results: Ex-vivo assays show efficient protective effect of CAZ on plasmatic antiproteinases against oxidative stress; a dose-dependent inhibitory capacity on endothelial and A549 cells against MPO toxicity or excessive production of ROS during anoxia/reoxygenation. On cell-free systems, CAZ had unique 1O2–scavenging activity; and less effect on ferryl species. CAZ exerts its antioxidant effect by chelating activity. Conclusions: Overall results indicate that: 1) CAZ protects endothelial cells against MPO toxicity but also A549 cells towards the effect of anoxia/reoxygenation; 2) CAZ protects α2M and 3) acts as efficient inhibitor of lipid peroxidation of linoleate and hydroxyl radical and as singlet oxygen-scavengers. Antioxidant properties of CAZ might be relevant in clinical situations where excessive activation of leukocytes is known and in anoxia/reoxygenation model cause an increased production of ROS. [less ▲]

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See detailLes bénéfices de l'apprentissage d'application web 2.0 pour un public fragilisé
Géron, Stéphanie ULg; Jacquet, Maud ULg

Conference (2008, October 02)

Application web 2.0 et public fragilisé : présentation d'un module sur le traitement de texte en ligne dans le cadre du projet PMTIC

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See detailAnalysis of climatic conditions of wildfires in Belgium with an automatic daily atmospheric circulation patterns classification
Erpicum, Michel ULg; Fettweis, Xavier ULg; Mabille, Georges ULg

Conference (2008, October 02)

An automatic daily atmospheric circulation patterns classification was built using the geopotential heights of 850 hPa level from the ECMWF (re)analysis over the period 1958-2007. The classification is ... [more ▼]

An automatic daily atmospheric circulation patterns classification was built using the geopotential heights of 850 hPa level from the ECMWF (re)analysis over the period 1958-2007. The classification is based on a similarity index between two 850hPa geopotential maps centred on Belgium, taking into account the slope difference between both daily geopotential surfaces as well as the absolute geopotential difference between both surfaces. Wildfire occurrences are analysed in April and September together with monthly frequencies and persistences of daily atmospheric circulation patterns types as well as with monthly variability of weather climate conditions. [less ▲]

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See detailLimestone karst rodents in Southeast Asia
Latinne, Alice ULg; Michaux, Johan ULg

Conference (2008, October 02)

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See detailNew cycles found in air temperature data and proxy series
Nicolay, Samuel ULg; Mabille, Georges ULg; Fettweis, Xavier ULg et al

Conference (2008, October 01)

We apply the wavelet transform tool to detect unsuspected cycles in several climatic time series

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See detailWatch out Burn out
Nyssen, Anne-Sophie ULg

Conference (2008, October)

Detailed reference viewed: 26 (4 ULg)
See detailHistopathological comparison of two mouse-adapted influenza A strains in mice.
Garigliany, Mutien-Marie ULg; Habyarimana, Adélite; Cornet, Anne et al

Conference (2008, October)

Detailed reference viewed: 15 (7 ULg)
See detailSedimentological traces of earthquakes in recent lakes sediments along the North Anatolian Fault, Turkey
Avsar, Ulas; Boes, X; Hubert, Aurelia ULg et al

Conference (2008, October)

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See detailUne lecture scientométrique de la littérature sur les réseaux sociaux en sciences de gestion et en entrepreneuriat
Froehlicher, Thomas ULg; Bares, Franck; Bourgne, Patrick

Conference (2008, October)

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See detailBases biologiques et éco-hydrauliques pour la restauration de la continuité piscicole en rivière : premier bilan et perspectives en Région Wallonne (Belgique).
Ovidio, Michaël ULg; Philippart, Jean-Claude ULg; Denoel, Philippe et al

Conference (2008, October)

Dans le prolongement de la Directive Benelux d’avril 1996 (libre circulation des poissons migrateurs) et de la Directive Cadre sur l’Eau de l’Union Européenne (2000/60/CE), le rétablissement de la ... [more ▼]

Dans le prolongement de la Directive Benelux d’avril 1996 (libre circulation des poissons migrateurs) et de la Directive Cadre sur l’Eau de l’Union Européenne (2000/60/CE), le rétablissement de la continuité piscicole dans nos cours d’eau fait partie des objectifs prioritaires de la Direction des Cours d’eau Non Navigables du Ministère de la Région Wallonne. Depuis 1997, différents acteurs, gestionnaires, sociétés de pêches et scientifiques abordent en profondeur cette problématique par l’exécution de différentes actions intégrées. Depuis environ 10 ans, un travail de terrain considérable est accompli pour le compte de la Région wallonne par la Fédération de Pêche Vesdre-Amblève (asbl) qui répertorie et géoréférence la totalité des obstacles physiques susceptibles de perturber la continuité piscicole dans les cours d’eau de Wallonie. En parallèle, le Laboratoire de Démographie des Poissons et d’Hydroécologie (LDPH) de l’Université de Liège étudie l’impact biologique de certains de ces obstacles sur les populations de poissons, principalement en utilisant la technique du radio-pistage. Ces recherches permettent de mieux connaître les phénomènes de mobilité et de migrations des poissons de nos cours d’eau ainsi que leurs capacités à franchir en remontée des obstacles typologiquement très différents. Ces travaux permettent d’identifier les sites critiques qui doivent prioritairement êtres équipés de dispositifs de franchissement efficaces. Le contrôle scientifique du fonctionnement des passes migratoires nouvellement construites démontre clairement leurs effets positifs sur la qualité écologique et piscicole de la rivière. De tels résultats justifient fortement de multiplier ce type d’action de restauration écologique (hydromorphologique) dans d’autres cours d’eau. Au cours de notre exposé, nous présenterons, avec des résultats concrets, un premier bilan des travaux déjà effectués et nous dégagerons les perspectives à moyen et long terme en matière de libre circulation des poissons dans les cours d’eau wallons, non seulement en remontée mais aussi en descente (ou dévalaison). [less ▲]

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