References of "Scientific congresses and symposiums"
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See detailOn-line respiratory mechanic monitoring in newborns: reproducibility and effect of ventilatory mode
Rigo, Vincent ULg; Rigo, Jacques ULg

in Archives of Disease in Childhood (2008, November), 93(suppl II), 483

Objectives: Neonatal ventilator softwares provide information on respiratory mechanics (RM). Integration of those values with clinical variables could improve ventilation management. We investigated ... [more ▼]

Objectives: Neonatal ventilator softwares provide information on respiratory mechanics (RM). Integration of those values with clinical variables could improve ventilation management. We investigated accuracy and reproducibility of those variables in Assist Control (AC) and Synchronised Intermittent Mandatory Ventilation (SIMV) modes. [less ▲]

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See detailThe amazing bouncing droplet
Terwagne, Denis ULg; Dorbolo, Stéphane ULg; Vandewalle, Nicolas ULg et al

Poster (2008, November)

When a low viscosity oil droplet is laid onto the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by ... [more ▼]

When a low viscosity oil droplet is laid onto the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by injecting fresh air under the droplet. This can happen when the surface of the bath oscillates vertically. In this case the droplet basically bounces on the interface [1, 2]. We observe that the conditions for bouncing depends on the frequency, more precisely we observe resonance when the eigenfrequency of the droplet is excited. Lord Rayleigh expressed the droplet deformation modes in terms of spherical harmonics Y m. We present different l experimental mode of deformation with the corresponding spherical harmonic model. In some conditions, a droplet presents a non axi-symmetric mode of deformation. That leads to a rotation of the droplet and to a horizontal displacement. [less ▲]

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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)

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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 detailDu contenu du sens au sens du contenu chez Heidegger et Wittgenstein
Gauvry, Charlotte ULg

Conference (2008, November)

Detailed reference viewed: 11 (0 ULg)
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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 ▲]

Detailed reference viewed: 12 (2 ULg)
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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)

Detailed reference viewed: 16 (2 ULg)
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Peer Reviewed
See detailWhy Leap Over? Redefining the Banks of the Uncanny Valley
Collignon, Stéphane ULg

in Capey, M.; Ip, B.; Blastland, Felicity (Eds.) Inaugural SAND Academic Peer reviewed Papers (2008, November)

proposition de révision du graphique de la Uncanny Valley en fonction des caractéristiques de la caricatures d'une point de vue cognitif et éthologique.

Detailed reference viewed: 35 (0 ULg)
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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 detailAssessing and aggregating trends in groundwater bodies. Examples of the FP VI Aquaterra-project
Broers, Hans-peter; Visser, Ate; Brouyère, Serge ULg et al

in EU Groundwater Policy Development - Good Status Objectives and Integrated management planning (2008, November)

Detailed reference viewed: 12 (1 ULg)
See detailPredictive Design of Honeycomb Sandwich Panels
Assaker, Roger; Depouhon, Alexandre ULg; Botman, Jean-Pierre

in Proceedings of Sampe Benelux professional meetings (2008, November)

Detailed reference viewed: 19 (2 ULg)
See detailMesures spéciales et respect des droits de l’homme, Rapport belge en vue du XVIII Congrès international de l’Association internationale de droit pénal
Jacobs, Ann ULg; De Hert, Paul

in Mesures spéciales et respect des droits de l’homme (2008, November)

Detailed reference viewed: 34 (6 ULg)
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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)

Detailed reference viewed: 50 (6 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: 9 (1 ULg)
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See detailSpatiotemporal Distribution of Polysaccharides During the Mammalian Auditory Organ Development
Thelen, Nicolas ULg; Compère, Philippe; Malgrange, Brigitte et al

Poster (2008, October 31)

Detailed reference viewed: 5 (1 ULg)
Peer Reviewed
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 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 ▲]

Detailed reference viewed: 138 (25 ULg)
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 detailSocial behaviour in Eisenia fetida (Oligochaeta, Lumbricidea)
Zirbes, Lara ULg; Deneubourg, Jean-Louis; Haubruge, Eric ULg

(2008, October 30)

Detailed reference viewed: 63 (8 ULg)
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See detailSafety Potentials of Advanced Driver Assistance Systems in Commercial Vehicles
Christen, Fréderic ULg; Zlocki, A.; Becher, T.

in 24. VDI-VW-Gemeinschaftstagung Integrierte Sicherheit und Fahrerassistenzsysteme (2008, October 30)

Advanced driver assistance systems (ADAS) do not only promise higher driving comfort, but potential benefit for an increase of safety especially for commercial vehicles. Accidents with involvement of ... [more ▼]

Advanced driver assistance systems (ADAS) do not only promise higher driving comfort, but potential benefit for an increase of safety especially for commercial vehicles. Accidents with involvement of commercial vehicles normally have severe consequences. The Institut für Kraftfahrzeuge (ika) of the RWTH Aachen University with support from the Institut für Straßenwesen (isac) der RWTH Aachen University have investigated in cooperation with the Bundesanstalt für Straßenwesen (BASt) current and future ADAS for commercial vehicle in order to determine the potential for their benefit to increase road safety. Based on the acci- dents of official statistics and in-depth analysis of accidents from the GIDAS data base, relevant accident reasons are assessed systematically for a possible interference with selected ADAS. The qualitatively estimated safety potential results from the superposition of the main accident characterisation, the accident type and the accident category. A detailed estimation of the safety potential is conducted by means of simulations with the traffic flow simulation tool PELOPS. A benefit-cost analysis of the investigated systems is conducted. [less ▲]

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See detailPersistent organic pollutants in wild seabass (Dicentrarchus labrax) from the Northeast atlantic coastal regions and relationship with thyroid hormone levels
Schnitzler, Joseph ULg; Thomé, Jean-Pierre ULg; Das, Krishna ULg

Poster (2008, October 30)

Polychlorinated biphenyls (PCBs) and organochlorine pesticides like Dichloro-Diphenyl-Trichloroethane (DDTs), Hexachlorocyclohexanes (HCHs), Aldrin and Dieldrin were analysed in the muscle of sea bass ... [more ▼]

Polychlorinated biphenyls (PCBs) and organochlorine pesticides like Dichloro-Diphenyl-Trichloroethane (DDTs), Hexachlorocyclohexanes (HCHs), Aldrin and Dieldrin were analysed in the muscle of sea bass (Dicentrarchus labrax) sampled in coastal regions near several important European river mouths (Garonne, Charente, Loire, Seine and Scheldt). These organochlorinated compounds are known to influence the endocrine system of many fish species and mammals and are thus qualified as endocrine disrupters. To highlight a potentially harmful effect of these compounds on the thyroid function of these fishes, we measured the muscular concentrations of thyroid hormones T3 and T4 by Radio-Immuno-Assay. The contamination levels were as follows: the highest concentrations were measured in individuals collected from the coastal region near the Scheldt > Seine > Loire > Charente and the lowest levels were observed in sea bass from coastal regions near the Garonne (from 2422 to 6188 ng.g-1 lw). The measured levels were generally higher than those reported in literature in sea bass from other regions in the Mediterranean Sea. Contamination patterns were different depending on the sampling area and thus the river input of pollutants. The multivariate statistical analysis revealed a significant relationship between the measured persistent organic pollutants and thyroid hormones in muscle. We cannot exclude the assumption that an endocrine disruption of the thyroid related to these pollutants could be the origin of these modifications of the thyroid hormone concentrations. [less ▲]

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See detailApplication de la Thermographie infrarouge au diagnostic
Leemans, Vincent ULg

in Les méthodes et outils de diagnostic et de contrôle appliqués pour la maintenance et la maîtrise des risques (2008, October 30)

Présentation de l'état de l'art en matière de maintenance, par thermographie infrarouge

Detailed reference viewed: 54 (3 ULg)
Peer Reviewed
See detailMaternal transfer of trace metals to offspring in northern elephant seals
Habran, Sarah ULg; Debier, Cathy; Crocker, Daniel et al

Poster (2008, October 30)

Detailed reference viewed: 42 (13 ULg)
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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.

Detailed reference viewed: 66 (2 ULg)
Peer Reviewed
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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Peer Reviewed
See detailL’hémorragie cérébrale : le coup de tonnerre dans un ciel serein
Martin, Didier ULg

Conference (2008, October 23)

Detailed reference viewed: 4 (0 ULg)
See detailNa et K anormaux : A quoi faut-il penser?
Krzesinski, Jean-Marie ULg

Conference (2008, October 23)

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See detailExperimental and analytical investigations on the behaviour of building frames further to a column loss
Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in Mazzolani, F.; Mistakidis, E.; Borg, R. P. (Eds.) et al Urban Habitat Constructions under Catastrophic Events (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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Peer Reviewed
See detailSequence-Selective inhibition of the DNA binding potencies of Pit-1 and Brn-3 transcription factors by phenyl-furan-benzimidazole DNA ligands
Peixoto, Paul ULg; Depauw, Sabine; Hildebrand, Marie Paule et al

Poster (2008, October 22)

Detailed reference viewed: 12 (3 ULg)
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)

Detailed reference viewed: 62 (5 ULg)
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Peer Reviewed
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 detailLes capacités, un nouvel étalon pour évaluer les inégalités ?
Orianne, Jean-François ULg; Verhoeven, Marie

Conference (2008, October 17)

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See detailLes pratiques de flexicurité : pour une approche analytique
Xhauflair, Virginie ULg; Pichault, François ULg

in Actes des Etats Généraux du Management (2008, October 17)

Etant donné la dimension de plus en plus politique et idéologique du débat sur la flexicurité, il nous semble urgent d’inverser la perspective et de partir de l’observation et de l’analyse d’initiatives ... [more ▼]

Etant donné la dimension de plus en plus politique et idéologique du débat sur la flexicurité, il nous semble urgent d’inverser la perspective et de partir de l’observation et de l’analyse d’initiatives concrètes émergeant sur le terrain. Sur la base d’une démarche de recherche-action, nous proposons tout d’abord une grille d’analyse des dynamiques de flexibilité et de sécurité, articulée autour de dimensions polarisées et pertinentes pour l’ensemble des parties concernées. Nous considérons ensuite les diverses modalités possibles que peuvent prendre les pratiques de conciliation entre flexibilité et sécurité, à l’aide d’une deuxième grille d’analyse que nous appliquons à un cas du secteur de la logistique. Nous concluons en amorçant sur cette base une discussion sur le caractère souhaitable et socialement acceptable des compromis émergents. [less ▲]

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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 detailClimate-responsive Building Design in North-East India
Singh, Manoj Kumar ULg; Mahapatra, Sadhan; Atreya, S. K.

in Emerging trends in Energy Efficiency Opportunities and challenges (2008, October 17)

Energy, environment and architecture are closely related, the more is the energy consumption the worse is the environmental degradation. With rapid economic growth and improvement in people’s living ... [more ▼]

Energy, environment and architecture are closely related, the more is the energy consumption the worse is the environmental degradation. With rapid economic growth and improvement in people’s living standard, the building sector will continue to be the key energy end user. Hence energy conservation becomes a necessity rather than an option in both commercial and residential buildings and hence it becomes desirable to design climate responsive buildings by incorporating appropriate solar passive features. Climate responsive building design is a concept that integrates the micro-climate and architecture with human thermal comfort conditions. This concept takes into account the solar passive techniques, micro-climatic conditions and thermal comfort conditions that improve the building artificial energy efficiency. This fact is well supported by various studies on vernacular architecture as well as on modern architecture throughout the world. Thermal comfort not only makes the occupants comfortable but also decides the energy consumption in the building and thus its sustainability. Throughout the world, from ancient times people have used solar passive techniques that have evolved through generations. These structures got attention for detailed study among the researchers at present times. Different researchers had done extensive study on thermal performance of vernacular buildings in the different parts of the world. However, vernacular architecture of North-Eastern India which perfectly represents the principle of climate-oriented architecture still lacks experimental validation and quantitative analysis. A field study has been carried out to evaluate the thermal comfort perception of the occupants in naturally ventilated buildings at different bioclimatic zones of North-East India. The survey was performed in naturally ventilated buildings during the winter, pre-summer season in 2008. There were 220 occupants from 75 vernacular buildings who participated in this study and 200 questionnaire responses were collected. The data collected include temperature, humidity and lighting level, as well as results from questionnaires on the occupant’s sensations of thermal comfort. We came across some interesting findings related to bioclimatism, socio-economic status, cultural setup and sustainability in this vernacular architecture. We also found different solar passive features available in most of these houses related to temperature control and promotion of natural ventilation. These houses are constructed using locally available building materials. Since these materials have low embodied energy and are from the same climatic zone. Henceforth, they fit into the local environment perfectly and represent a unique example towards achieving sustainability. [less ▲]

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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 detailNASS Congress
Martin, Didier ULg

Conference (2008, October 14)

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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 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 detailEvidence of HLA-mediated immune response driving the maintenance of CTL-escape variants in patients with undetectable viral load
Dilernia, D.; Lourtau, L.; Jones, L.R. et al

in AIDS Research and Human Retroviruses (2008, October 13), 4(1), 79

Evidence of HLA-mediated immune response driving the maintenance of CTL-escape variants in patients with undetectable viral load. Dario A Dilernia, L Lourtau, L Jones, S Rodriguez, C Bautista, M Gomez ... [more ▼]

Evidence of HLA-mediated immune response driving the maintenance of CTL-escape variants in patients with undetectable viral load. Dario A Dilernia, L Lourtau, L Jones, S Rodriguez, C Bautista, M Gomez-Carrillo, M Losso, and H Salomon. Immune response drives the selection of CTL-escape mutations during the course of HIV infection. After initiation of HAART, antiviral drugs exert a stronger selective force leading to a higher limitation of viral replication. Our objective was to evaluate the effectiveness of immune response as a selective force in a context of extremely reduced viral population size. Gag gene was sequenced and HLA-A and B genotyped over 108 samples from drug-naïve HIV-1 positive individuals. Associations between HLA alleles and viral polymorphisms were assessed by logistic regression. Multiple comparison corrections were addressed by the BH method (q-values). Phylogeny correction was performed by a Bayesian Markov-Chain Monte-Carlo method. Analysis of site-specific synonymous and non-synonymous substitution rate was assessed through the codon-based ML IFEL method. For four patients with viral load < 50 copies/ml (identified according to their HLA profile), RNA extraction was performed from 7 ml of plasma through an ultracentrifugation-based method and gag gene amplified through a Hi-Fi PCR. 20-40 clones were sequenced in samples obtained previously and during HAART. We found that HLA-B57 and A03 were the most efficient alleles in forcing CTL-escape, targeting mainly the previously characterized epitopes TSTLQEQIGW(p=0.0002) and RLRPGGKKK(p<10E-7), respectively. Sites under significant positive selection (p<0.05) during HAART were position 20 (within A03-restricted RLRPGGKK) for patient A02A3B35B39, position 385 (within A3-restricted RGNFRNQRK) for patient A3A31B7B45 and position 84 (within A2-restricted SLYNTVATL) for patient A2A3B39B57. Epitopes sequences of RLRPGGKKK and TSTLQEQIGWF were in the escape state for patients harboring the selective alleles. In spite of the low viral diversity achieved during HAART, we detected sites under positive selection. Our results show that during successful HAART, targeted CTL-epitopes are still forced to evolve adaptively, suggesting that CTL-mediated immune response would be able to keep driving the evolution of HIV variants even in viral population with a remarkable low replication rate. [less ▲]

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See detailAN IDENTIFICATION STUDY ON BOTTLENOSE DOLPHINS (TURSIOPS TRUNCATUS) IN NORTHEAST PATAGONIA, ARGENTINA
Vermeulen, Els ULg; Cammareri, Alejandro; Failla, Mauricio et al

Poster (2008, October 13)

In Argentina, bottlenose dolphin (Tursiops truncatus) sightings decreased notably since the late 80s in regions where it used to be frequent to observe them. Nowadays, Northeast Patagonia is one of the ... [more ▼]

In Argentina, bottlenose dolphin (Tursiops truncatus) sightings decreased notably since the late 80s in regions where it used to be frequent to observe them. Nowadays, Northeast Patagonia is one of the few regions where they still can be seen frequently, although local increasing human activities result in increasing need for information. In general, photo-identification has been established as a helpful tool in cetacean research. However, only few studies have applied this method to bottlenose dolphins in Argentina. This study is therefore aimed to obtain basic information concerning bottlenose dolphins through their identification, this way contributing to their conservation. Land-based observations were made in the northern Gulf of San Matías, Patagonia, Argentina, from August 2006 up to June 2008. Over 15.000 digital pictures of dorsal fins were analysed using the computer assisted identification systems FinEx and FinMatch. Dolphins re-identified during all four seasons in one year were defined as residents. The degree of residency was further estimated by the re-identification frequency (RF); non-resident (RF=1-3) - occasional (RF=4-7) - frequent (RF=8-11) - common (RF¿12). In total, 221 surveys were conducted with an average observation effort of 3.2h per survey, resulting in a total observation effort of 915h of which 124h were spent with 182 dolphin groups. A total of 50 dolphins were identified of which the vast majority (82%) was photographed only in the Natural Protected Area Bahía San Antonio (NPABSA), due to the higher observation effort in this region. Nevertheless, 12% of the catalogued dolphins could be photographed in both NPABSA and the Río Negro estuary, indicating that their home-range might include at least the whole northern region of the Gulf San Matias. Dolphins could be re-identified up to 13 days with 54% showing a degree of residency for NPABSA. This study shows the first data concerning bottlenose dolphins in Northeast Patagonia, but further investigation is highly necessary to improve their conservation. Therefore, the obtained photo-identification catalogue from the presented study is meant to serve as a primary tool for progressing research concerning this species in Argentina. [less ▲]

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

Conference (2008, October 11)

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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 detailSanté et travail en Europe depuis deux siècles
Geerkens, Eric ULg; Bruno, Anne-Sophie; Hatzfeld, Nicolas et al

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 detailAFM, chemistry, mechanics and (bio)molecules: Tooling up for Nano
Duwez, Anne-Sophie ULg

Conference (2008, October 09)

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See detailRésultats préliminaires d’une étude sur les biopsies rectales prélevées avec une pince à biopsie utérine
Leroux, Aurélia ULg; Amory, Hélène ULg; Van Galen, Gaby ULg

Poster (2008, October 09)

Introduction : La description pratique de la technique de biopsie rectale dans l’espèce équine diffère d’un auteur à l’autre. Pour obtenir des échantillons représentatifs, il est souvent suggéré effectuer ... [more ▼]

Introduction : La description pratique de la technique de biopsie rectale dans l’espèce équine diffère d’un auteur à l’autre. Pour obtenir des échantillons représentatifs, il est souvent suggéré effectuer les biopsies à l’aveugle au moyen d’une pince à biopsie utérine plutôt que par endoscopie rectale. Les sites de prélèvement préconisés sont variables. Même si tous les auteurs s’accordent à dire qu’il faut réaliser la biopsie en arrière du cul-de-sac rétropéritonéal [1] [2], la distance de prélèvement en avant de l’anus varie de 15 cm [2] [5] à 30 cm [1] [3]. De plus, le prélèvement est réalisé tantôt au plafond [1] [5], tantôt au plancher [3] du rectum. De nombreux auteurs évoquent le très faible risque de complication suite à la biopsie rectale [1] [4], mais la perforation, l’abcès périrectal et la péritonite septique ont été décrits [2]. Objectifs : Le but de cette étude est d’évaluer les risques associés à la technique de biopsie rectale réalisée au moyen d’une pince à biopsie utérine. Méthodes : Cette étude a été effectuée sur 11 chevaux destinés à l’euthanasie : les 7 premiers ont été biopsiés sous anesthésie générale, et les 4 autres ont été biopsiés debout sous tranquillisation (0,01mg/kg détomidine IV ou 0,6mg/kg xylazine IV). Résultats : Aucun des 4 chevaux biopsiés debout n’a montré de signes de douleur au cours de la procédure. Pour un droitier, il s’est avéré plus facile d’effectuer la biopsie rectale avec la pince dans la main droite et la muqueuse rectale dans la main gauche et de prélever à 2H. Discussion et conclusions : La biopsie rectale est facile à faire et bien supportée sur le cheval tranquillisé, bien qu’elle soit fréquemment associée à des hémorragies locales. Le prélèvement devrait être fait à moins de 15 cm de profondeur pour réduire les risques de péritonite. Il est en outre conseillé d’effectuer les biopsies à 10H (gaucher) ou 2H (droitier) pour faciliter techniquement l’acte et réduire les risques d’hématomes. Attendu que l’euthanasie a été effectuée juste après les biopsies, le développement éventuel d’autres complications n’a pas été évalué dans cette étude. Dans une étude suivante, l’aspect histologique des prélèvements obtenus par biopsie sera évalué et comparé à celui obtenu post-mortem. References 1. BRAZIL T. (2007) How to: duodenal and rectal biopsy, BEVA Congress 2007 Proceedings, 66-67. 2. DEBOWES R.M. (1991) Standing rectal and tail surgery, Vet. Clin. North Am. Equine Pract., 7 : 3, 649-667. 3. LINDBERG R., NYGREN A., PERSSON S.G.B. (1996) Rectal biopsy diagnosis in horses with clinical signs of intestinal disorders: a retrospective study of 116 cases. Equine Vet. J., 28 : 4, 275-284. 4. PLUMMER P.J. (2006) Malabsorptive maldigestive disorder with concurrent Salmonella in a 3-year-old quarter horse. Vet. Clin. North Am. Equine Pract., 22 : 1, 85-94. 5. TAMZALI Y. (2006) Chronic weight loss syndrome in the horse: a 60 case retrospective study. Equine Vet. Educ., 18 : 6, 289-296. [less ▲]

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See detailDie Aachener Verfahrenstechnik stellt sich vor: Fusion und doch frei!
Büchs, Jochen; Marquardt, Wolfgang; Melin, Thomas et al

Conference (2008, October 09)

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See detailVorticity balance in the Northwestern African Upwelling
Troupin, Charles ULg; Mason, Evan; Sangrà, Pablo

Poster (2008, October 06)

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See detailBiogeochemical Investigations of Coccolithophore Blooms along the Continental Margin of the Northern Bay of Biscay: Highlights of the PEACE Project
Chou, Lei; Harlay, Jérôme ULg; De Bodt, Caroline et al

Poster (2008, October 06)

Recent studies have demonstrated that changing ocean chemistry due to ocean acidification poses a growing threat for marine organisms such as corals, coccolithophores and many others that form calcareous ... [more ▼]

Recent studies have demonstrated that changing ocean chemistry due to ocean acidification poses a growing threat for marine organisms such as corals, coccolithophores and many others that form calcareous skeletons. Its biogeochemical feedbacks and impact on the oceanic carbon cycle are yet to be quantified. Coccolithophores are the major calcifying phytoplankton in the sub-polar and temperate regions of the world’s ocean. They produce furthermore transparent exopolymer particles (TEP), which are known to promote aggregate formation. Combined with the CaCO3 ballast effect, large-scale coccolithophore blooms could thus contribute to the export of organic carbon to deep waters on relatively short time scales. During the Belgian PEACE project, we have conducted yearly interdisciplinary biogeochemical surveys, assisted by remote sensing, along the continental margin of the northern Bay of Biscay where coccolithophore blooms dominated by Emiliania huxleyi are frequently and recurrently observed (Figure 1). Rates of various processes governing the coccolithophore ecosystem dynamics have been determined and associated biogeochemical parameters analysed. The overall objective is to evaluate the role in climate regulation of calcification, primary production and export processes during coccolithophore blooms. Here we report the principal results obtained during the 2006 campaign. [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 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 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 detailOblique Object
Winand, Jean ULg

Conference (2008, October 03)

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See detailA gas micromechanical sensor based on surface plasmon resonance
Hastanin, Juriy ULg; Habraken, Serge ULg; Renotte, Yvon ULg et al

in Proceedings of SPIE (2008, October 02), 7116

We will present a new concept related to the micromechanical sensors for detecting the presence and concentration of chemical substances and/or biological organisms. A bi-dimensional array of micro ... [more ▼]

We will present a new concept related to the micromechanical sensors for detecting the presence and concentration of chemical substances and/or biological organisms. A bi-dimensional array of micro-cantilever coated by different types of sensing layer enables to identify a characteristic chemical composition of the gas in real-time mode. The selective molecular absorption by cantilever sensing layer will produce cantilever bending proportional to the concentration of molecules. To increase the gas sensor sensitivity, the SPR phenomenon is used for cantilever deflection monitoring. [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 detailIntegration of Accurate 2D Inundation Modelling, Vector Land Use Database and Economic Evaluation
Ernst, Julien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

Poster (2008, October 02)

Within the global framework of the climate change, according to most Regional Climate Mod-els the maximum peak discharges in river will increase in importance and frequency. Therefore the people will have ... [more ▼]

Within the global framework of the climate change, according to most Regional Climate Mod-els the maximum peak discharges in river will increase in importance and frequency. Therefore the people will have to face worst inundation conditions. In order to protect themselves from the increasing flood risk, the communities have to draw up suitable flood protection measures. The selection and the evaluation among the different possible flood mitigation measures requires developing decision-support system (DSS). This sys-tem has to take into consideration parameters such as hydraulic, economic, social or environmental. This pa-per focuses on the integration between two components of the DSS, namely the evaluation of the economic impacts of floods and the hydrodynamic modelling. The hydraulic simulations are conducted by means of WOLF 2D flow modelling system and provide as an output high resolution flood maps detailing the distribu-tion of water depth and flow velocity in the floodplains. The integration is ensured by the use of very accurate geographic databases and an automated procedure which makes the most of geomatic methods. The paper de-tails the application of the integrated assessment procedure for a case study along the river Ourthe located in the Meuse basin (Belgium). Moreover, possibilities of validation of the economic damage evaluation proce-dure are investigated by comparing computation results with real damage data recorded by the Belgian Disas-ter Fund after several major flood events (2003, 2002, 1995, and 1993). [less ▲]

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See detailModelling rapidly rotating stars
Reese, Daniel ULg

in Journal of Physics: Conference Series (2008, October 01), 118

Recent interferometric observations have drawn attention to the effects of rapid rotation on stellar structure. Consequently, a number of 2D models and pulsation codes have been and are being developed in ... [more ▼]

Recent interferometric observations have drawn attention to the effects of rapid rotation on stellar structure. Consequently, a number of 2D models and pulsation codes have been and are being developed in order to gain a better understanding of such stars. These have shed light on effects like centrifugal deformation, gravity darkening, differential rotation and the transport of chemical elements and angular momentum. Pulsation modes within these stars have a different geometrical structure, characterised by a new organisation of the frequency spectrum, as shown by eigenmode calculations and ray dynamics. [less ▲]

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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 detailLe goût et l'odorat, une sensorialité commune?
Von Hoffmann, Viktoria ULg

Conference (2008, October)

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