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See detailSTAtion of Reference and rEsearch on Change of local and global Anthropogenic Pressures on Mediterranean Ecosystems Drifts: The STARECAPMED project
Richir, Jonathan ULg; Abadie, Arnaud ULg; Binard, Marc ULg et al

Conference (2015, November 08)

The Marine and Oceanographic Research Station STARESO in the Calvi Bay, Corsica (France), is a unique tool in a preserved natural site that includes all the characteristic ecosystems of the Mediterranean ... [more ▼]

The Marine and Oceanographic Research Station STARESO in the Calvi Bay, Corsica (France), is a unique tool in a preserved natural site that includes all the characteristic ecosystems of the Mediterranean littoral. The station, established in 1970, has archived environmental data for decades. The STARECAPMED project, multidisciplinary, articulates itself around these two main features. Its objective is to understand how human activities can interact with the fundamental processes that govern the functioning of the different coastal ecosystems of a Mediterranean bay. The understanding of these interactions involves: (i) the identification of the anthropogenic pressures; (ii) the quantification of their impacts on the ecosystems; (iii) the prioritization of these impacts. STARECAPMED also aims to confirm the relevance of the use of the Calvi Bay as a reference in the study of local and global pressures and the changes they may cause on the structure and the functioning of Mediterranean coastal ecosytems. [less ▲]

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See detailL'ostéopathie: mythe ou réalité?
Henrotin, Yves ULg

Conference (2015, November 07)

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See detailPrise en charge non pharmacologique de la gonarthrose; actualités et perspectives
Henrotin, Yves ULg

Conference (2015, November 07)

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See detailPrévoir/prévenir la contamination : récit d’anticipation et hygiénisme
Stienon, Valérie ULg

Conference (2015, November 07)

Au croisement de la médecine, de l’urbanisme et du réformisme social, les théories hygiénistes influencent profondément les conceptions du vivre-ensemble au XIXe siècle en France. Au même moment, les ... [more ▼]

Au croisement de la médecine, de l’urbanisme et du réformisme social, les théories hygiénistes influencent profondément les conceptions du vivre-ensemble au XIXe siècle en France. Au même moment, les romans d’anticipation développent des préoccupations similaires à travers leurs visions de la communauté : conditions fragiles de la santé publique, mesures prophylactiques contre l’épidémie, mises à l’épreuve du corps social et des infrastructures urbaines. Émile Souvestre envisage l’allaitement des enfants à la vapeur (Le Monde tel qu’il sera, 1846), Jules Verne conçoit France-Ville comme la « cité du bien-être » centrée sur la propreté (Les Cinq Cents Millions de la Bégum, 1879), Léon Daudet satirise une autocratie médicale devenue meurtrière par l’application outrancière des lois d’hygiène (Les Morticoles, 1894) et Paul Adam présente l’organisation des villes selon les cycles de la reproduction, favorisant la femme enceinte mais rendant stérile le soldat (Les Lettres de Malaisie, 1898). Les convergences entre les théories hygiénistes et les récits d’anticipation reposent non seulement sur un discours social et idéologique privilégiant certaines topiques comme la contamination, mais aussi sur des formes d’expression spécifiques, l’hygiénisme ayant généré nombre d’écrits – du traité à l’essai – caractérisés par leur propre poétique. Poser des principes, édicter des lois, recenser les composantes du corps social, réformer les mœurs, cartographier la ville et catégoriser ses habitants : ces démarches cognitives et les rhétoriques qui leur sont associées transitent aussi par la fiction romanesque, qui les fait siennes. On propose d’examiner ce double aspect : entre théorie et application, entre discours social et roman, comment la fiction d’anticipation s’approprie-t-elle l’hygiénisme pour en confirmer les principes, les critiquer ou les réinventer ? Quelles sont les modalités de ce dialogue à la fois prédictif et prescriptif (intégration, citation, transposition) ? Enfin, une évolution est-elle perceptible au long de la seconde moitié du siècle ? [less ▲]

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See detail) The spatial variability of trace element bioaccumulation processes: Tools to environmental management
Richir, Jonathan ULg; Lejeune, Lejeune; Lepoint, Gilles ULg et al

Conference (2015, November 07)

As transitional environments, coastal meadows are particularly vulnerable to pollution. Trace elements remain contaminants of concern because of their persistence, their ability to accumulate in biota and ... [more ▼]

As transitional environments, coastal meadows are particularly vulnerable to pollution. Trace elements remain contaminants of concern because of their persistence, their ability to accumulate in biota and their toxicity. Local, regional, national and cross-border programs are thus initiated to monitor their environmental occurrence. Sentinel organisms, or bioindicators, have been widely used to this end since they accumulate the bioavailable and thus potentially toxic fraction of contaminants. In the framework of the STARECAPMED project, the accumulation of trace elements in the seagrass Posidonia oceanica (L.) Delile was studied at different spatial scales: along a radial (100 m scale), in a bay (1 km scale), along the French Mediterranean littoral (10-100 km scale) and along the whole Mediterranean coastline (100-1000 km scale). Results showed that the contamination of the sampled shoots could vary as much at opposite scales. This benthic primary producer accumulates contaminants sequestered in the sediments, in addition to their dissolved fraction in the water column. The sediments also offer a time integration of coastal pollution and thus amplify the pollution signal recorded by the seagrass, resulting in the observed spatial variability. These results demonstrate that the in-depth knowledge of the ecology of the monitored bioindicator and the interactions it shares with its environment cannot be ignored. Such failure could lead to erroneous interpretations of the levels of contamination of monitored sites, and points out the need to define a sampling strategy based on the monitoring objectives and the selected bioindicator. [less ▲]

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See detailThe trace element contamination of coastal waters: A holistic approach to environmental monitoring surveys
Richir, Jonathan ULg; Gobert, Sylvie ULg

Conference (2015, November 07)

Sustained monitoring programs are necessary to evidence the efficacy of regulatory controls on pollutant discharges and to assess the health status of ecosystems. Within this perspective, this study aimed ... [more ▼]

Sustained monitoring programs are necessary to evidence the efficacy of regulatory controls on pollutant discharges and to assess the health status of ecosystems. Within this perspective, this study aimed to monitor the coastal trace element contamination of the whole Mediterranean, using Posidonia oceanica (L.) Delile as bioindicator. But sustainable coastal management also requires the development of appropriate classification systems intended, among other purposes, for environmental managers and policy makers. The combined utilization of several complementary monitoring tools - water quality scale, pollution index, spatial analysis - successfully led to the development of such an operational classification system: it allowed to assess contamination threats and to depict contamination gradients of the entire Mediterranean, while assessing more regional and local impacts. Consequently, such holistic approaches should be privileged to accurately monitor the contamination rate of coastal waters and to transfer relevant information on this composite problem to environmental managers and policy makers. [less ▲]

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See detailEquine cadaver ligaments : A new promising source of stem cells
Shikh Al Sook, Mohamad Khir ULg; Gabriel, Annick ULg; Salouci, Moustafa et al

Scientific conference (2015, November 07)

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See detailDo changes in atmospheric CO2 concentration affect aphid alarm signaling?
Boullis, Antoine ULg; Appeldoorn, Claire; Oostrom, Marjolein et al

Conference (2015, November 06)

The effects of global atmospheric changes on vegetation and associated insect populations are increasingly studied, but how these gases affect the interactions between herbivore insects and their natural ... [more ▼]

The effects of global atmospheric changes on vegetation and associated insect populations are increasingly studied, but how these gases affect the interactions between herbivore insects and their natural enemies is less clear. As the efficacy of natural enemies is governed largely by behavioral mechanisms, changes in the behavior of insect prey defenses can change the dynamics of insect populations. The impact of increases in atmospheric carbon dioxide (CO2) concentrations on aphid population dynamic is well documented. However, few publications about their chemical ecology are reported. Aphids are using many chemical signals to communicate with each other or with their environment. For example aphids produce an alarm pheromone to signal the presence of a natural enemy in the colony. For our experiments, aphids Acyrthosiphon pisum (Harris) were reared on Vicia faba L. in home-made Plexiglas® chambers, allowing us to control the CO2 concentration, temperature and humidity. Aphids were reared under both ambient (aCO2 ≈ 400 ppm) and elevated (eCO2 ≈ 800 ppm) CO2 concentration for several generations. Here we quantified the emission of (E)-β-Farnesene (EβF - main compound of alarm pheromone) released by predated aphids reared under ambient or elevated CO2 concentration, with two different methods: a real-time analysis, and the total amount analysis. The EβF content of whole aphid bodies was also analyzed, as well as the escape behavior of aphid colony according to the growing conditions of aphid populations. These results will be discussed in terms of biological control in future climate. [less ▲]

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See detailComposite dark matter and direct-search experiments
Wallemacq, Quentin ULg

in International Journal of Modern Physics D : Gravitation, Astrophysics & Cosmology (2015), 24

The results of the direct searches for dark matter are reinterpreted in the framework of composite dark matter, i.e. dark matter particles that form neutral bound states, generically called “dark atoms” ... [more ▼]

The results of the direct searches for dark matter are reinterpreted in the framework of composite dark matter, i.e. dark matter particles that form neutral bound states, generically called “dark atoms”. Two different scenarios are presented: milli-interacting dark matter and dark anti-atoms. In both of them, dark matter interacts sufficiently strongly with terrestrial matter to be stopped in it before reaching underground detec- tors, which are typically located at a depth of 1 km. As they drift towards the center of the earth because of gravity, these thermal dark atoms are radiatively captured by the atoms of the active medium of underground detectors, which causes the emission of photons that produce the signals through their interac- tions with the electrons of the medium. This provides a way of reinterpreting the results in terms of electron recoils instead of nuclear recoils. The two models involve milli-charges and are able to reconcile the most contradictory experiments. We determine, for each model, the regions in the parameter space that reproduce the experiments with positive results in con- sistency with the constraints of the experiments with negative results. [less ▲]

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See detailFE2 approach for the modelling of coupled hydro-mechanical behaviour of partially saturated coalbeds
Bertrand, François ULg

Diverse speeche and writing (2015)

Présentation de projet de thèse au comité FRIA

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See detailCHANGEMENT CLIMATIQUE: CAUSES ET CONSEQUENCES (2015) - ANALYSE HOLISTIQUE -
Ozer, Pierre ULg

Scientific conference (2015, November 06)

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See detailAnalyse multifractale de la divergence de séries d'ondelettes
Esser, Céline ULg

Scientific conference (2015, November 06)

Dans cet exposé, nous étudions la divergence ponctuelle de séries d'ondelettes dans un espace de Besov. Nous obtenons une borne supérieure pour la dimension de Hausdorff de l'ensemble des points ayant un ... [more ▼]

Dans cet exposé, nous étudions la divergence ponctuelle de séries d'ondelettes dans un espace de Besov. Nous obtenons une borne supérieure pour la dimension de Hausdorff de l'ensemble des points ayant un taux de divergence donné, et nous montrons que cette borne est optimale en utilisant les notions de résidualité et de prévalence. Il s'agit d'un travail en collaboration avec S. Jaffard. [less ▲]

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See detailImpact of Regiella insecticola infection on EBF production in Acyrthosiphon pisum Harris
Bauwens, Julien ULg; Mazzucchelli, Gabriel ULg; De Pauw, Edwin ULg et al

Conference (2015, November 06)

Symbionts of aphids influence their host from many points of view. We investigate the potential influence of bacterial symbionts on the production and emission of the aphid alarm pheromone, E-β-franesene ... [more ▼]

Symbionts of aphids influence their host from many points of view. We investigate the potential influence of bacterial symbionts on the production and emission of the aphid alarm pheromone, E-β-franesene. Some trends could be observed in the total EβF production. Particularly, aphid strains infected by Buchnera only seemed to produce less alarm pheromone. By contrast, the presence of Regiella insecticola seemed to increase EβF production. Mevalonate pathway was investigated by RT-qPCR. This analysis showed a slightly lower transcription level o mIPPS in Regiella-infected strains. This enzyme is involved in the last step of EβF production. By contrast, two enzymes involved respectively in the linkage and release of farnesyl moeities on proteins c-terminal ends. Escape tests were conducted to assay if these results were traduced by differential behavior in front of a predator. Preliminary results showed significantly higher dropping behavior for Regiella-infected strains. [less ▲]

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See detailL'Automobile dans le comic strip : un passage à toute vitesse
Crucifix, Benoît ULg

Article for general public (2015)

Né au tournant du XXe siècle, au cœur de la modernité, le comic strip s’est tout de suite approprié ces rapides changements apportés par la modernisation, son industrialisation et sa croissance urbaine ... [more ▼]

Né au tournant du XXe siècle, au cœur de la modernité, le comic strip s’est tout de suite approprié ces rapides changements apportés par la modernisation, son industrialisation et sa croissance urbaine, son éventail de nouvelles technologies, spectacles et attractions. Son « langage » est d’ailleurs intimement nourri de ces changements : comme le suggère Thierry Smolderen dans Naissances de la bande dessinée, la bande dessinée s’est développée dans le laboratoire de l’illustration humoristique et de sa dynamique « polygraphique », pris dans une vibrante dynamique culturelle de dialogue entre différents médias. Tout comme la chronophotographie pour le phonographe, les transformations technologiques et urbaines qui ont marqué le tournant du XXe siècle ont offert un terrain particulièrement fertile aux illustrateurs et cartoonists, qui s’en saisissent allègrement. Ce que le comic strip donne à voir c’est donc bien ce nouvel environnement urbain que navigue ses lecteurs. Cela en va de même pour les moyens de locomotion et le trafic urbain, un sujet-clé cultivé par les cartoonistes : métro, tramways, zeppelins, calèches, tout y passait. Mais ce rapport à la modernité, c’est aussi un lien à une culture de l’accélération et de la vitesse mécanisée, concomitant avec le boom de la bicyclette et de l’automobile. Il n’est donc pas étonnant que les automobiles, qui se sont développées au même moment que le comic strip, y soit richement figurées, prenant la forme d’une véritable attraction. [less ▲]

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See detailLa liberté religieuse sur les lieux de travail
Kéfer, Fabienne ULg

Scientific conference (2015, November 06)

This conference explores the way in which Belgian law deals with situations where labour law engages with the right to freedom of religion and belief and the right not to be discriminated on grounds of ... [more ▼]

This conference explores the way in which Belgian law deals with situations where labour law engages with the right to freedom of religion and belief and the right not to be discriminated on grounds of religion. It starts with the Belgian regime of religious freedom, protection against discrimination and valid reasons for termination of employment. It then considers specific areas of those regimes in Belgian labour relations, such as the work schedule accommodation, the refusal to perform work, clothing and religious symbols in the workplace, and the work in an ethos organization. It relates mainly to Belgian case law but also to the case law of the European courts [less ▲]

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See detailReinventing paternalism. The micropolitics of work in the mining companies of Central Africa
Rubbers, Benjamin ULg

Scientific conference (2015, November 06)

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See detailBiomakers of osteoarthritis
Henrotin, Yves ULg

Conference (2015, November 05)

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