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See detailCe qu’on peut dire, montrer ou pas
Strivay, Lucienne ULg

Conference (2010, December 03)

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See detailBuñuel et le sombrero mexicain
Vanden Berghe, Kristine ULg

Conference (2010, December 02)

La conférence analyse quelques aspects de la relation entre Buñuel et la culture mexicaine officielle. D'abord on analyse le discours du cinéaste lui-même sur ce qu'il appelait la 'culture du sombrero ... [more ▼]

La conférence analyse quelques aspects de la relation entre Buñuel et la culture mexicaine officielle. D'abord on analyse le discours du cinéaste lui-même sur ce qu'il appelait la 'culture du sombrero'. Ensuite on lit les textes que le poète Octavio Paz écrivit sur le cinéaste espagnol. [less ▲]

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See detailColliding-winds in massive star binaries: expectations from radio to gamma-rays
De Becker, Michaël ULg

Conference (2010, December 02)

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See detailNumerical simulation and performance assessment of an absorption solar air-conditioning system coupled with an office building
Thomas, Sébastien ULg; Andre, Philippe ULg

Conference (2010, December)

To minimize environmental impact and CO2 production associated with air-conditioning, it is reasonable to evaluate the prospects of a clean energy source. Solar energy, via thermal collectors can provide ... [more ▼]

To minimize environmental impact and CO2 production associated with air-conditioning, it is reasonable to evaluate the prospects of a clean energy source. Solar energy, via thermal collectors can provide a part of the heating needs. Moreover, it can drive absorption chiller in order to satisfy the cooling needs of buildings. The objective of the work is to evaluate accurately the energy consumption of an air conditioning system including a solar driven absorption chiller. The complete simulation environment includes the absorption chiller itself, the cooling tower, the solar collectors field, heater, storage devices, pumps, heating-cooling distribution, emission system and building. The modelling of each subsystem is detailed. TRNSYS software modular approach provides the possibility to model and simulate this complete system. [less ▲]

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See detailWhat can we learn from the auroral footprints of the Jovian moons? (Invited)
Bonfond, Bertrand ULg

Conference (2010, December)

The signature of electromagnetic interaction between the moons Io, Europa and Ganymede and the Jovian magnetosphere can be observed on Jupiter’s polar ionosphere in the form of auroral footprints. The ... [more ▼]

The signature of electromagnetic interaction between the moons Io, Europa and Ganymede and the Jovian magnetosphere can be observed on Jupiter’s polar ionosphere in the form of auroral footprints. The observation campaigns carried out during the past few years by the Hubble Space Telescope in the Far UV domain provided not only a high spatial and temporal resolution but also an unprecedented System III longitude coverage. Consequently, these recent observations of the morphology and the dynamics of the footprints proved to be very powerful tools to probe these interactions. For example, the locations of the satellite footprints have been used as a valuable constraint for building Jovian magnetic field models. Moreover, analysis of the multiplicity of the Io footprint spots as well as their relative motion lead to new conclusions on the electron acceleration processes. The altitude of the Io footprint has also been used to infer the typical energy of the impinging electrons. Finally, the study of the three-dimensional shape and of the brightness of the different sub-structures of the footprints provides important clues on the processes at play between Io and the Jovian ionosphere. On the theoretical side, considerable efforts have also been recently carried out in order to model the propagation of the Alfvén waves generated at Io and the subsequent acceleration of auroral electrons. Coupled with HST images, radio decametric measurements and in situ data from the Galileo spacecraft, these advances provide a brand new understanding of the satellite footprints. [less ▲]

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See detailNightglow investigation around 1.27 µm with VIRTIS/Venus-Express
Migliorini, A.; Piccioni, G.; Gérard, Jean-Claude ULg et al

Conference (2010, December)

In this study we report about the investigation of the spectral region 1.22-1.32 µm of the night side of Venus, observed by the VIRTIS instrument (Visible and InfraRed Spectral Imaging Spectrometer) on ... [more ▼]

In this study we report about the investigation of the spectral region 1.22-1.32 µm of the night side of Venus, observed by the VIRTIS instrument (Visible and InfraRed Spectral Imaging Spectrometer) on board the Venus Express spacecraft. This spectral region is characterized by the presence of the extensively studied (a1Δg – X3Σg-) (0,0) O2 nightglow band, the most intense emission observed on the night side of Venus. However, the comparison between data and synthetic spectra from the (0,0) band only, lacks a good match at wavelengths longer than 1.27 μm, especially in the region around 1.28-1.29 μm. The effects of temperature, CO2 and the (8,5) OH emission at 1.28 µm were investigated as a possible cause to the spectral disagreement, but they all are not enough to explain the observed difference. Instrumental effects were also excluded as possible cause of the mismatch. We found that the inclusion of the (1,1) band O2 emission in the synthetic spectra, originating from the upper vibrational level ν=1 of the (a1Δg – X3Σg-) transition centered at 1.28 μm, in addition to the (0,0), significantly improves the agreement between simulated spectra and observed data in the region at 1.28-1.29 μm. A synthetic spectrum, including the (0,0) and the (1,1) is produced and compared to 4 observed VIRTIS spectra, as an example. From the analyzed data, it results that the (1,1) band with an intensity ranging from the 8 to 15% of the (0,0) band is required to best reproduce the observed VIRTIS spectra. This corresponds to a (1,1) band intensity equal to 3.1-5.8 MR, in limb view, in agreement with the upper limit set by Connes et al., (1979), on their ground-based observations of the oxygen nightglow of Venus. [less ▲]

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See detailBridges tout céramique : comment limiter le risque.
MAINJOT, Amélie ULg

Conference (2010, December)

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See detailFrom Metagenomes To Industrially Relevant Enzymes
Berlemont, Renaud ULg

Conference (2010, December)

Microorganisms living in extreme conditions have now been isolated from all type of extreme environments and numerous extremozymes originating from these organisms have been described and characterized ... [more ▼]

Microorganisms living in extreme conditions have now been isolated from all type of extreme environments and numerous extremozymes originating from these organisms have been described and characterized. Indeed, most of their potential resides in their enzymes. As stated by Huston in 2008 : “As environmental concerns arise, biological tools are increasingly replacing harsh chemical and physical means of processing materials and they even harbor promise for creating cost-effective sustainable energy sources. It is imperative that we continue investigating ways in which natural products can offer economical alternatives to traditional industrial processes”. In this context the search for valuable extremophiles and their integration in industrial processes will, without any doubt, fulfill these objectives in extending the use of microorganisms and of their products to unexpected transformations. Extensive investigations on extremophiles were therefore carried out for the reason that the large diversity of these organisms allowed to think that it is probably possible to find within them the appropriate isolate that produces the best possible product for a specific application. Of course these organisms have to be unravelled and their peculiarities sometimes render the culture conditions inappropriate. The recent emergence of the metagenomic approach has, however, modified the context and has now rendered possible the investigation of the world of non cultivable microorganisms. Indeed, recent advances of the metagenomic highlighted the underestimated gene diversity contained in environmental samples. In order to isolate new valuable cold adapted proteins, Antarctica soil metagenomic libraries were constructed and screened for various activities. Screenings were performed in industrially derived conditions, when feasible, and allowed the isolation of several new lipases/esterases, proteases, amylases, xylanases, … Hence, thorough characterization of the new enzymes is required prior their integration into industrial processes. We will discuss case-studies on three enzymes primarily isolated for the agro-food industry and displaying particular features. [less ▲]

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See detailChipping et Zircone
MAINJOT, Amélie ULg

Conference (2010, December)

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Peer Reviewed
See detailAttogram level measurement of POPs in human: From adipose tissue to DBS
Focant, Jean-François ULg; Welch; Turner et al

Conference (2010, December)

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See detailBilan et prise en charge des dysphonies du patient âgé
FINCK, Camille ULg

Conference (2010, December)

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See detaillastidial glycolitic enzymes are crucial regulators of primary metabolism in Arabidopsis: potential biotechnological targets
Ros, Roc; Muñoz-Bertomeu, Jesús; Cascales - Miñana, Borja ULg et al

Conference (2010, December)

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See detailSAXS analysis in terms of density fluctuations within random observation window
Gommes, Cédric ULg

Conference (2010, December)

Detailed reference viewed: 9 (2 ULg)
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See detailThe S-adic conjecture: general case and complexity 2n
Leroy, Julien ULg

Conference (2010, December)

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See detailComoment Risk and Stock Returns
Lambert, Marie ULg; Hübner, Georges ULg

Conference (2010, December)

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See detailLa vie à 3.2 milliards d'années
Javaux, Emmanuelle ULg; Marshall, Craig; Bekker, Andrey

Conference (2010, November 30)

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See detailMesurer la qualité des transitions sur le marché du travail
Orianne, Jean-François ULg

Conference (2010, November 30)

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See detailLes aspects juridiques d'une possible scission de la Belgique, ses conséquences sur le plan interne et international
Behrendt, Christian ULg

Conference (2010, November 30)

Conférence donnée le 30 novembre 2010 à la Salle académique de l'Université de Liège, à l'invitation de la Commission internationale du Barreau de Liège

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See detailBiodegradable polymers designed for tissue engineering and drug delivery
Grandfils, Christian ULg

Conference (2010, November 30)

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See detailLa modernizacion reflexiva en accion : autoterapia de un politologo europeo
Delvenne, Pierre ULg

Conference (2010, November 30)

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See detailChitosan based nanofiber-membranes for tissue engineering
Jérôme, Christine ULg

Conference (2010, November 29)

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See detailLa déontologie du psychologue
Blavier, Adelaïde ULg; Darras, B.

Conference (2010, November 29)

Detailed reference viewed: 53 (15 ULg)
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See detailRuptures, pertes et reconstruction identitaire au sein des nouvelles familles
D'Amore, Salvatore ULg; Scarciotta, Lidia; Pauss, Véronique

Conference (2010, November 29)

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See detailThe Real Advantage of the Romanian Transition Heritage for the Development Cooperation
Teclu, Codrat Alin ULg

Conference (2010, November 26)

Cette communication se base principalement sur une observation participante de deux mois en février et mars 2009 au sein du secrétariat de la Fédération des ONG roumaines de Développement (FOND ... [more ▼]

Cette communication se base principalement sur une observation participante de deux mois en février et mars 2009 au sein du secrétariat de la Fédération des ONG roumaines de Développement (FOND). Confronté d'une part à l'incertitude des protagonistes quant à leur rôle dans l'architecture de l'aide au développement, et d'autre part à une constante mise en scène des interactions entre ces acteurs de la coopération roumaine au développement (CRAD), l'auteur propose d'analyser le jeu de figuration (faceworking) des trois principales parties prenantes du champ (le Ministère des Affaires Étrangères, le PNUD et FOND). En se basant sur l'oeuvre du sociologue Erving Goffman, l'objectif de cette présentation est de montrer l'influence de ce faceworking sur la structuration de la CRAD. La conclusion propose une réflexion sur la plus-value que l'expérience de la transition peut représenter pour la coopération roumaine au développement. [less ▲]

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See detailLinked Contracts and the Construction Industry
Kohl, Benoît ULg

Conference (2010, November 26)

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See detailThe Origins of Small Business Failure: A Grounded Typology
Crutzen, Nathalie ULg; Van Caillie, Didier ULg

Conference (2010, November 26)

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See detailStruggling around ‘dagong’: dialectics of contention and accommodation
Florence, Eric ULg

Conference (2010, November 26)

Since the launching of market-oriented reforms in post-Mao China, the Chinese party-state has re-deployed some of its categorization, allocation, and spatialization prerogatives. The rapid societal ... [more ▼]

Since the launching of market-oriented reforms in post-Mao China, the Chinese party-state has re-deployed some of its categorization, allocation, and spatialization prerogatives. The rapid societal changes at work in post-Mao China have implied a complex process of transformation of the Party-state’s sponsored economy of signs and values. The various ways in which rural migrant workers have been represented are in this respect particularly worth studying, this at least for two interrelated reasons. Firstly, migrant workers have been playing a central economic role within the Pearl River Delta’s but also within the whole country’s economic growth since they provide the vast majority of manpower in the labour-intensive industries. Since the capacity to generate high levels of economic growth and to improve people’s living standards are crucial in the Party’s legitimisation building, migrants also play an important political role. But at the same time, the vary harsh labour regimes implemented in the Pearl River Delta and the violence ─ both physical and symbolic ─ that the meeting of global capitalism and post-Mao China state socialism generate upon migrant workers also constitutes a challenge for a ruling party whose founding narratives are still grounded precisely upon the rejection of capitalist exploitation. In this paper I want to show that by delving into migrant workers’ narratives of their experience of ‘dagong’ and more specifically within their migration rationale one can get a glimpse of the at once empowering and also highly constrained dimension of migrant agency. Within specific patterns of accumulation, that is a context of combined “dull compulsion of economic relations” and of “routine repression”, I will document the process by which “people’s experiences and “practical engagements with the daily world” are linked to “historically produced institutional and structural settings” (Smith, 1996). As migration is intimately linked to unstable identification processes (at the individual and collective levels) and to the state project of legitimation, migrant narratives provide a particularly interesting vintage point to examine these processes of hegemonic contention and struggle. In the last section of the paper I will argue for the need to take into account contradictions seriously when studying migration experiences through ethnographic work. The data used for this paper are part of an extensive analysis by the author of the Shenzhen mainstream written press, participant observation, in-depth interviews with about 10-15 rural migrants, short informal interviews in the streets with about 70-100 people from 2001 to 2008, and a body of unpublished letters to the editor of several migrants’ magazines. [less ▲]

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See detailL’apport de la théorie de l’acteur-réseau à la professionnalisation de la GRH dans une institution de soins.
Dervaux, Amélie ULg; Pichault, François ULg; Renier, Nathalie ULg

Conference (2010, November 26)

Nous entendons par cette communication faire le point sur une expérience pilote en cours, sur la méthodologie mise en place, ses difficultés et ses conditions de succès, ainsi que sur sa capacité à ... [more ▼]

Nous entendons par cette communication faire le point sur une expérience pilote en cours, sur la méthodologie mise en place, ses difficultés et ses conditions de succès, ainsi que sur sa capacité à contribuer au développement d’une gestion des ressources humaines intégrée au sein d’une institution hospitalière. Plusieurs points d’attention méritent néanmoins d’être soulignés, comme l’ « effet groupe-pilote », l’influence des médecins ou la lassitude des acteurs face à la durée d’un tel projet. Ils constituent autant de facteurs de risque susceptibles d’affecter le bon déroulement de la démarche entamée. [less ▲]

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See detailNMR studies on radioactive actinide complexes. A completely foolish idea?
Vidick, Geoffrey ULg; Bouslimani, Nouri; Desreux, Jean-François ULg

Conference (2010, November 26)

The complete separation of actinides and lanthanides by solvent extraction is an important step in the reprocessing of nuclear wastes. The trivalent ions of these two families of f elements have very ... [more ▼]

The complete separation of actinides and lanthanides by solvent extraction is an important step in the reprocessing of nuclear wastes. The trivalent ions of these two families of f elements have very similar properties and it is only recently that an effective separation method has been developed. It is assumed that this separation can be achieved because of small differences in the covalency of the coordination bonds formed by the f ions but this has not been proved so far. We embarked into the first NMR study of the actinide complexes with the hope of better unravelling their solution structures and of clarifying the role of covalency. Nuclear magnetic resonance has nearly never been used for investigating actinide ions and their complexes not only because of their radioactivity and their toxicity but also because of the lack of dedicated spectrometers. It was also assumed that paramagnetism would cause excessive line broadenings. Many difficulties had thus to be overcome and the first step in our work was to show that well-resolved NMR spectra of actinide complexes (U to Cm) could indeed be obtained. Relatively narrow resonances have been observed for a variety of ions in different oxidation states provided their complexes are stable, symmetric and rigid. We used several advanced NMR techniques in order to fully characterize the actinide ions and their chelates in water or in organic solvents. The dispersion of the longitudinal relaxation time T1 of solvent nuclei with the magnetic field (NMRD) yields information on the magnetic properties and on the dynamic behaviour of paramagnetic species; 17O NMR allows the measurement of the water exchange times and 1H and 13C spectra yield information on the solution structures of the complexes. It will be shown that the paramagnetic shifts induced by the actinide ions originate from both a through space dipolar contribution and a through bonds contact contribution. The latter gives access to delocalized unpaired electron densities that are directly related to the covalency of the metal-ligand bonds. However, electron densities can only be obtained after separation of the two contributions. This could be accomplished thanks to variable temperature studies. In another approach, new ligands with rigid aliphatic substituents have been synthesized and contact contribution were deduced with the assumption that delocalization does not proceed to the 1H nuclei most removed from the metal center. This study has been extended to actinides in the trivalent, tetravalent and hexavalent states and new ligands have been synthesized in order to increase the magnetic anisotropy while keeping the symmetry and the rigidity needed to simplify the NMR analyses. [less ▲]

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See detailL'affect entre loi et norme. Rousseau et la question de la censure
Pieron, Julien ULg

Conference (2010, November 26)

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See detailSanté au Travail et Promotion de la Santé : quelles interactions ?
Muller, Michel; Mairiaux, Philippe ULg

Conference (2010, November 26)

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See detailSartre "en procès" : Justice, violence et Etat
Cormann, Grégory ULg

Conference (2010, November 25)

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See detailMaintenir dans l'emploi le travailleur malade ou blessé : un défi !
Mairiaux, Philippe ULg

Conference (2010, November 25)

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See detailHemocompatibility of nanoparticles designed for drug delivery
Grandfils, Christian ULg; Sevrin, Chantal ULg; Cerda, Bernardino

Conference (2010, November 24)

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See detailEffects of shading and sediment alterations on Posidonia oceanica meadows: in situ experiments
Pete, Dorothée ULg; Velimirov, Branko; Lepoint, Gilles ULg et al

Conference (2010, November 24)

In the Mediterranean Sea, the seagrass Posidonia oceanica is affected by many threats from anthropogenic sources. One of them is the increasing development of fish farming, which is responsible of the ... [more ▼]

In the Mediterranean Sea, the seagrass Posidonia oceanica is affected by many threats from anthropogenic sources. One of them is the increasing development of fish farming, which is responsible of the destruction of some meadows. Within troubles cause by those fish farms on the surrounding environment, the increase of phytoplankton biomass in the water column (leading to a shading effect) and a modification of the sediment are often cited as a reason of seagrass disappearance. To understand how those troubles are affecting P. oceanica and its sedimentary compartment, in situ experiments were led during three months, from the end of May til the end of August 2009, in STARESO (STAtion de REcherches Sous-marines et Océanographiques, Corsica, France), at a depth of 10 meters. The shading was mimicked by three replicated shading frames (3 x 1 m), which stopped around 50 % of the incident light. To modify the sedimentary compartment, some sediment was taken from under the fish farm of Calvi (Corsica, France) and added once a week on marked zones in the seagrass meadow. Those sites were compared with a control site, situated in the same meadow. Samples were taken once a month and consisted in pore water, sediment cores and shoots of P. oceanica. An estimation of the density of the meadow in every sampling zones was also performed. Measured parameters are the concentration of nutrients in pore water, grain size, redox potential discontinuity (RPD), biomass of bacteria, organic matter, meiofauna and microphytobenthos within the sediment, total carbon and nitrogen in the sediment and leaves, the length, width and biomass of leaves and shoots, the biomass of epiphytes and the content of chlorophyll a in leaves. During those experiments, Posidonia oceanica was not very affected. However, some parameters of the sedimentary compartment were modified (RPD, biomass of bacteria, organic matter, nutrients in pore water,…), suggesting a modification in the functioning of the ecosystem. These results are important because they show that the sedimentary compartment reacts more rapidly to threats then the seagrass itself. So, it could be an interesting tool in quality assessments. [less ▲]

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See detailL’hydrologie, une partenaire de la géomorphopédologie pour une gestion transéchelle des grands enjeux environnementaux
Degre, Aurore ULg; Sohier, Catherine ULg; Colard, François ULg et al

Conference (2010, November 24)

La zone insaturée du sol et du sous-sol est souvent qualifiée de zone critique, étant donné son rôle d’interfaçage entre les compartiments aérien et souterrain de notre environnement. Dans les thématiques ... [more ▼]

La zone insaturée du sol et du sous-sol est souvent qualifiée de zone critique, étant donné son rôle d’interfaçage entre les compartiments aérien et souterrain de notre environnement. Dans les thématiques du transfert des solutés ou de la conservation des eaux et des sols, les recherches d’hydrologie et d’hydraulique agricole s’appuient sur les informations pédologiques et ce depuis une échelle extrêmement locale jusqu’à la vision régionale de la gestion environnementale. Le rôle des descriptions pédologiques dans la gestion et la protection des ressources naturelles est donc majeur. La dérivation des paramètres hydrodynamiques depuis les descriptions pédologiques des sols permet à l’hydrologue de quantifier et de représenter spatialement la dynamique des échanges eau-sol-végétation-atmosphère, les déplacements de l’eau dans le sol et la vadose ainsi que les déplacements et les transformations des solutés. L’hydrologue en retire des indicateurs de pression sur les ressources hydriques de surface et souterraine. Il calcule des flux d’eau, de nutriments et de sédiments à un pas de temps très fin et durant de longues périodes (plus de 30 années). Les recherches présentées ici couvrent la modélisation hydrologique physiquement basée à l’échelle régionale qui vise l’analyse prospective (au-delà de 2020) des mesures envisagées pour limiter les pollutions diffuses d’origine agricole, tout comme des modélisations physiques détaillées en sites expérimentaux. L’érosion hydrique des sols est un autre un enjeu majeur de gestion environnementale. Le sol étant une ressource peu renouvelable, les techniques de conservation des sols et l’aménagement hydraulique des bassins versants ruraux nécessitent la plus grande considération. Elles sont un outil supplémentaire de limitation des apports au cours d’eau (tant en termes de sédiments qu’en termes de nutriments). Là encore, les descriptions pédologiques permettent de cibler les sols les plus sensibles. De plus, les cartes des sols qui incluent une interprétation géomorphologique permettent de confronter les modèles d’arrachement, de transport et de dépôt de sédiments aux observations des pédologues faites lors des premiers levés et actuellement en cours. Ces observations de terrain, réalisées à plusieurs dizaines d’années d’intervalle, constituent un gisement de données précieux et quasiment unique pour la validation des modèles hydrologiques de perte en sol et de dépôt et en vue de l’étude morphodynamique des bassins versants. Il reste actuellement des besoins en termes de description pédologique. Ils ont trait à la caractérisation plus fine de certains sigles, où l’introduction d’éléments relatifs à la dynamique des flux pourrait s’avérer pertinente. Toutefois, on peut constater que dans le contexte actuel et crucial de préservation des ressources eau et sol, l’hydrologie et la science du sol sont réaffirmées comme des partenaires forts de gestion des grands enjeux environnementaux. [less ▲]

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See detailDes outils d'aide à la décision pour un échantillonnage, un conseil agronomique et un conseil environnemental personnalisés
Genot, Valérie ULg; Cugnon, Thibaut; Buffet, Dominique et al

Conference (2010, November 24)

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See detailLa révision de la Carte Numérique des Sols de Wallonie au service d'un Système d'Information sur les Sols
Legrain, Xavier ULg; Demarcin, Pierre ULg; Bock, Laurent ULg et al

Conference (2010, November 24)

Depuis quelques années, on assiste à un regain d’intérêt concernant les sols et leurs propriétés, en relation avec une prise de conscience accrue de l’importance de leurs fonctions environnementales et de ... [more ▼]

Depuis quelques années, on assiste à un regain d’intérêt concernant les sols et leurs propriétés, en relation avec une prise de conscience accrue de l’importance de leurs fonctions environnementales et de la nécessité de préserver ce patrimoine difficilement renouvelable. Dans ce contexte, cette communication a comme objectif de dresser un état des lieux en matière de cartographie des sols en Wallonie et de présenter les travaux de valorisation et de révision de la Carte des Sols entrepris au sein de notre groupe de recherche-développement. En préalable seront brièvement commentés les principaux jalons ayant ponctué la cartographie des sols en Belgique, les pièces maîtresses étant la Carte des Sols de la Belgique (CSB) à 1/20.000 et plus récemment, pour la partie wallonne, la Carte Numérique des Sols de Wallonie (CNSW), sans toutefois occulter les divers produits associés, développés en marge de la carte (livrets explicatifs, monographies, cartes synthétiques, bases de données de profils, …) ou issus des travaux récents du Projet de Cartographie Numérique des Sols de Wallonie, le PCNSW (Carte des Principaux Types de Sols de Wallonie à 1/250.000, Unités de l’Espace Rural, …). Un bilan sera ensuite tiré quant aux besoins actuels et aux attentes par rapport à la Carte des Sols, au regard des enjeux environnementaux et des exigences des législations actuelles et à venir, tant au niveau régional qu’européen. A travers plusieurs exemples, on montrera en quoi l’information délivrée directement par la CNSW au travers des symboles constituant les sigles pédologiques montre parfois ses limites ou du moins, ne permet pas de répondre directement aux besoins actuels. Faisant écho à ce constat, les travaux menés actuellement par le PCNSW seront présentés et développés, plus particulièrement dans leurs aspects méthodologiques et techniques. Il sera question tour à tour de mise en place d’une équipe de terrain, de révision thématique de la carte, de zones d’étude, de standards de description, de gestion et de structuration de l’information ou encore d’acquisition de matériaux de référence. Le crédo de nos travaux étant que la Carte des Sols, en tant qu’outil d’intégration, de structuration et de cadrage de l’information pédologique, doit devenir de plus en plus le fondement de Systèmes régionaux d’Information sur les Sols et leurs propriétés. [less ▲]

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See detailHow to enhance the performance of OSH services ?
Mairiaux, Philippe ULg

Conference (2010, November 23)

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See detailUsing a circulation type classification to analyse the general circulation over Greenland simulated by GCMs
Belleflamme, Alexandre ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

Conference (2010, November 23)

Future projections of the Greenland ice sheet melt are mainly based on General Circulation Model (GCM) outputs. The atmospheric circulation type classification offers a unique opportunity for validating ... [more ▼]

Future projections of the Greenland ice sheet melt are mainly based on General Circulation Model (GCM) outputs. The atmospheric circulation type classification offers a unique opportunity for validating the GCM-based circulations. Six GCMs used in the last IPCC report are analysed here. A correlation-based classification is constructed for each model using daily geopotential height at 500 hPa over Greenland. It is applied to a dataset combining the GCM-based outputs (20C3M scenario) for the current climate and the NCEP-NCAR 1 reanalysis data over the period 1961-1990 allowing a direct comparison for each circulation type. Most of the analysed models are able to reproduce the main circulation types, but they fail to reproduce their frequencies because they underestimate the climate variability. In addition, some biases in the mean geopotential height remain. However, we use our atmospheric circulation type classification for analysing future projections made by GCMs. As for the 20th century climate, a combined classification is made integrating reanalysis data over 1971-1990, GCM-based outputs over 1971-1990 (using 20C3M scenario) and GCM-based outputs over 2046-2065 and 2081-2100 (using A1B scenario). No new circulation types are individualised knowing that the main changes are just a general increase of the geopotential height. Furthermore, the changes in frequency observed between the 20th century climate and the first future period (2046-2065) are of the same order than the uncertainties of the models for simulating the current climate by comparison with the reanalysis data. Therefore, the circulation type classification is a useful tool to give a precise analysis of the atmospheric circulation simulated by GCMs knowing that most of downscaling techniques are dependent on the general circulation simulated by the GCMs. [less ▲]

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See detailLa biométhanisation : technologies de choix
Hiligsmann, Serge ULg; Hamilton, Christopher; Beckers, Laurent et al

Conference (2010, November 23)

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See detailMines, minières et carrières souterraines en Wallonie - Risques associés et contraintes
Pacyna, Daniel; Denayer, Julien ULg

Conference (2010, November 22)

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See detailUtilisation des scories sidérurgiques comme marqueur stratigraphique pour l'étude de l'évolution géomorphologique des plaines alluviales
Houbrechts, Geoffrey ULg; Petit, François ULg

Conference (2010, November 22)

Afin d’analyser la dynamique récente des plaines alluviales des rivières du massif ardennais, nous avons utilisé les scories, résidus de la transformation du minerai de fer en métal, comme marqueur ... [more ▼]

Afin d’analyser la dynamique récente des plaines alluviales des rivières du massif ardennais, nous avons utilisé les scories, résidus de la transformation du minerai de fer en métal, comme marqueur stratigraphique. Les scories constituent un traceur particulièrement exceptionnel ; elles sont présentes en grande quantité dans les alluvions des rivières ardennaises et les périodes d’activités des sites sidérurgiques et donc de rejets de scories sont connues précisément grâce aux études historiques. C’est à partir du XIVe siècle que les sidérurgistes wallons commencèrent à utiliser la roue hydraulique pour actionner les soufflets et les martinets des forges. Ils installèrent donc leurs fourneaux et leurs forges d’affinage à proximité des cours d’eau et produisirent de grandes quantités de scories. Ainsi, un haut fourneau du 16e siècle, qui fonctionnait en moyenne 130 jours par an, produisait de l’ordre de 80 m³ de scories par an. Ces scories étaient généralement rejetées sur les plaines alluviales, voire directement dans le lit des cours d’eau. Par la suite, ces scories ont été emportées lors des crues débordantes ou par érosion latérale de la rivière. Entre le XIVe et le XIXe siècle, plus de 300 sites sidérurgiques ont été actifs le long de plusieurs dizaines de rivières du massif ardennais. L’utilisation des scories comme marqueur stratigraphique a été proposée par le Professeur A. Pissart en 1972 et appliquée par Henrottay (1973), afin de déterminer des taux de sédimentation et de mobilité latérale postérieurs à l’apparition de l’activité sidérurgique dans les vallées. A la suite de cette étude, nous avons développé une méthode de mesure de concentration en scories qui permet de mieux localiser le contact entre les sédiments pré-et post-sidérurgiques, et de tenir compte de l’influence de la bioturbation et des contaminations lors des prélèvements. De plus, cette méthode montre que les teneurs en scories dans les sédiments ont varié dans le temps en relation avec les périodes de fonctionnement, d’expansion et d’arrêt des sites sidérurgiques situés en amont. Grâce aux scories, nous avons montré que la sédimentation en plaine alluviale a été particulièrement importante depuis la fin du Moyen Âge, de l’ordre de 10 à 20 cm/siècle en fonction des cours d’eau. La mobilité latérale des rivières est par ailleurs relativement faible et moins importante que les valeurs basées sur la comparaison de tracés sur cartes anciennes. [less ▲]

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See detailSite–specific monitoring for disease forecasting in winter wheat.
El Jarroudi, Moussa ULg; Giraud, Frédéric; Delfosse, Philippe et al

Conference (2010, November 22)

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See detailUn nouveau syndrome hémorragique inexpliqué chez le bovin- la Pancytopénie néonatale bovine
Theron, Léonard ULg; Galland, Bruno ULg; Vogin, Nathalie et al

Conference (2010, November 21)

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See detailLes coûts de l'étalement urbain
Halleux, Jean-Marie ULg

Conference (2010, November 19)

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See detailLes enjeux de l'écriture des sens
Delville, Michel ULg

Conference (2010, November 19)

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See detailDonnées chirurgicales récentes - adénomes hypophysaires
Martin, Didier ULg

Conference (2010, November 19)

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See detailLetture dei Ricordi di Francesco Guicciardini
Moreno, Paola ULg

Conference (2010, November 19)

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See detailAnalyse morphoconstitutionnelle des lithiases
Gadisseur, Romy ULg; Chapelle, Jean-Paul ULg; Cavalier, Etienne ULg

Conference (2010, November 18)

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See detailRobustness of structures
Demonceau, Jean-François ULg

Conference (2010, November 18)

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See detailLes perspectives d'harmonisation du droit de la construction
Kohl, Benoît ULg

Conference (2010, November 18)

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See detailZER Manucsripts of the Thousand and One Nights: Codicological features
Franssen, Elise ULg

Conference (2010, November 18)

In the end of the nineteenth century, the French orientalist Herman Zotenberg defined the « Egyptian Recension » of the text of the Arabian Nights; this group of manuscripts is now known as ZER (for « ... [more ▼]

In the end of the nineteenth century, the French orientalist Herman Zotenberg defined the « Egyptian Recension » of the text of the Arabian Nights; this group of manuscripts is now known as ZER (for « Zotenberg’s Egyptian Recension »). This classification is based on the tales, their succession, and the chronological and geographical origin of the manuscripts. This recension of the text is actually the best known version of the Nights, since most of the printed editions of the Thousand and One Nights are based on a manuscript being part of this group. Thus, this text seems to be well known but amazingly its manuscripts are not. No critical edition or deep study of any of them exists. Furthermore, some of the ZER manuscripts actually present similar codicological characteristics, such as their distribution in four volumes, or even the page setting and, sometimes, the handwriting. A precise codicological study of the ZER manuscripts permits determining if this group is as homogeneous as it appears on first sight or if, on the contrary, it can be divided into other subgroups. It gives information about the birth context of the group; where were the manuscripts copied? And for whom? Do they all derive from a single copy, the model being respected as far as in the physical aspect of the book? These are some of the questions I will try to answer. The collected codicological information will be compared to the conclusions of the narratological and philological study of each manuscript’s text. [less ▲]

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See detailCroyances métacognitives et hallucinations
Laroi, Frank ULg

Conference (2010, November 18)

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See detailEnquête pour une majoration de l'image mineure
Havelange, Carl ULg

Conference (2010, November 18)

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See detail"When history rhymes with trajectory". The stakes of language denomination in the historiography of the varieties of French spoken in Acadia and Louisiana
Urbain, Emilie ULg

Conference (2010, November 18)

The categorizations regarding language are rarely consensual, especially when considering linguistic minorities. Different types of stakes are hidden behind language designation, depending on whether the ... [more ▼]

The categorizations regarding language are rarely consensual, especially when considering linguistic minorities. Different types of stakes are hidden behind language designation, depending on whether the designation hinges upon activists or cultural, political or academic authorities. The metalinguistic terminology mobilized by discourses on language itself conveys linguistic ideologies. In the case of Acadia and Louisiana, the ideological positioning of French speakers is twofold: a positioning not only with respect to the Other English speaker, but also with respect to the Other French speaker. As French speaker, the tension is important between the willingness to claim and acknowledge divergent practices of a center, that is still hegemonic in the imaginary (France); and the willingness to erase the differences that would slow down an integration in the French-speaking world. That tension is discernible in the choice of denomination such as français acadien, français d’Acadie or français en Acadie. Focusing on Acadia and Louisiana, we consider and study the links between the metalinguistic terminology and the historiography of language. The history of language plays an ambiguous role. Mentioned to legitimate or depreciate linguistic practices towards a most often exogenous evaluative norm, it is also often associated with the external history of the conditions of implantation of French during colonization. Even though the history of language is seldom thematized, its position is central in these two communities where historical filiation (of Cajuns with Acadia, of Acadians with a mythical Acadia) even determines the ethnonyms. [less ▲]

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See detailGestion des invasives en Belgique : Une approche multi-facettes De la prévention à l’éradication
Mahy, Grégory ULg; Branquart, Etienne

Conference (2010, November 18)

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See detailInvestigation of anaerobic digestion in a two-stage bioprocess producing hydrogen and methane
Hiligsmann, Serge ULg; Hamilton, Christopher ULg; Beckers, Laurent ULg et al

Conference (2010, November 17)

Hydrogen has received wide attention in the last decades as a clean energy vector. The major advantage of energy generation from hydrogen is the near-zero carbon emissions, since the utilization of ... [more ▼]

Hydrogen has received wide attention in the last decades as a clean energy vector. The major advantage of energy generation from hydrogen is the near-zero carbon emissions, since the utilization of hydrogen, either via combustion or via fuel cells, results in pure water. Recently, there has been increasing interest on the biological production of hydrogen gas from renewable biomass such as carbohydrates from agriculture or agro-food industries. This specific anaerobic digestion is called dark fermentation and is involved in the classic anaerobic digestion producing methane. Indeed, in a two-step process, i.e. when acido- and aceto-genesis are carried out in a different bioreactor than methanogenesis, it is feasible to generate separated biogas flows containing either H2 or CH4 depending on specific operating parameters. This paper deals with the comparison of the first stage performances whether operated in optimum conditions for H2 production with a mixed culture or a pure Clostridium butyricum strain. Hydrogen yields of about 1.75 and 2.3 mol H2/mol glucose were achieved respectively. The metabolites, mainly acetate and butyrate, contained in the spent medium were efficiently converted to methane in a second anaerobic digester with a methane yield of about 170 ml/g COD initially fed in the first stage. [less ▲]

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See detailEtat d'avancement des études expérimentales entamées à l'université de Liège
Machiels, Olivier ULg

Conference (2010, November 16)

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See detail"Taming the publication machine", or Discourse Analysis made Subliminal
Thoreau, François ULg

Conference (2010, November 15)

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See detailL'insegnamento del diritto romano nel Belgio nel 2010
Gerkens, Jean-François ULg

Conference (2010, November 12)

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See detailUse of stable isotopes to study pollutants in marine vertebrates
Das, Krishna ULg

Conference (2010, November 11)

Detailed reference viewed: 33 (8 ULg)