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See detailProlongation de la durée de conservation de l'huile de cactus par ajout des huiles essentielles de quelques plantes aromatiques de la région du Sud marocain et d'huile d'Argan
Zine, S.; El Hadek, M.; Sindic, Marianne ULg

in 5èmes Journées Internationales d'Etude sur les Lipides - JIEL 2011 : Graisses alimentaires, Lipides marins, Nutrition et Santé (2011, December 08)

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See detailDecentralized Prediction of End-to-End Network Performance Classes
Liao, Yongjun ULg; Du, Wei; Geurts, Pierre ULg et al

in Proc. of the 7th International Conference on emerging Networking EXperiments and Technologies (CoNEXT) (2011, December 08)

In large-scale networks, full-mesh active probing of end-to-end performance metrics is infeasible. Measuring a small set of pairs and predicting the others is more scalable. Under this framework, we ... [more ▼]

In large-scale networks, full-mesh active probing of end-to-end performance metrics is infeasible. Measuring a small set of pairs and predicting the others is more scalable. Under this framework, we formulate the prediction problem as matrix completion, whereby unknown entries of an incomplete matrix of pairwise measurements are to be predicted. This problem can be solved by matrix factorization because performance matrices have a low rank, thanks to the correlations among measurements. Moreover, its resolution can be fully decentralized without actually building matrices nor relying on special landmarks or central servers. In this paper we demonstrate that this approach is also applicable when the performance values are not measured exactly, but are only known to belong to one among some predefined performance classes, such as "good" and "bad". Such classification-based formulation not only fulfills the requirements of many Internet applications but also reduces the measurement cost and enables a unified treatment of various performance metrics. We propose a decentralized approach based on Stochastic Gradient Descent to solve this class-based matrix completion problem. Experiments on various datasets, relative to two kinds of metrics, show the accuracy of the approach, its robustness against erroneous measurements and its usability on peer selection. [less ▲]

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See detailAssessment of Mytilus galloprovincialis to monitor 19 trace elements in the Calvi Bay
Richir, Jonathan ULg; Vermeulen, Simon; Biondo, Renzo ULg et al

Poster (2011, December 08)

Mussel caging with Mytilus galloprovincialis has been successively used to monitor classic trace metal (Cd, Cu, Zn, Cr, Fe, Ni, Pb) pollution of Mediterranean coastal waters at spatial scales ranging from ... [more ▼]

Mussel caging with Mytilus galloprovincialis has been successively used to monitor classic trace metal (Cd, Cu, Zn, Cr, Fe, Ni, Pb) pollution of Mediterranean coastal waters at spatial scales ranging from 10 to 100km. However, its relevance as bioindicator at smaller scales (100 m - 1 km) is poorly known. Moreover, the levels of some little studied trace elements (Al, V, Mn, Sb, Sn, Ag, Mo, Se, As, Co, Be, Bi), recently identified as potential pollutants of coastal environments, have not yet been assessed in that species. In this work, M. galloprovincialis was used to monitor the 19 listed trace elements at the scale of the Calvi Bay (NW Corsica, France). Additionally, we investigated decontamination kinetics and trace element tissue speciation before and after spawning. Mytilus galloprovincialis trace element levels reflect the good water quality of the Calvi Bay, showing little spatial variations either at 100m or 1km scales. Filter feeders are only influenced by their relatively homogeneous pelagic environment (dissolved trace elements and suspended particulate matters), in contrast to organisms which inhabit typically heterogeneous benthic habitats. This bioindicator, a convincing candidate for the monitoring of the 12 little studied trace elements, effectively accumulates the 19 studied elements to 105 seawater concentrations. Mytilus galloprovincialis rapidly equilibrates (within days) with its environment, and is therefore a good indicator of chronic and stable chemical pollutions. Tissue speciation shows that the most relevant organ to monitor trace elements is the hepatopancreas. However, the important variability induced by the reproductive cycle of mussels requires using this bioindicator during its sexual dormancy. [less ▲]

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See detailA Critical Investigation of the Concept of Life: Canguilhem or Bergson
Wong, Tai Tak Andy ULg

Conference (2011, December 08)

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See detailObservations of the White Light Corona from Solar Orbiter and Solar Probe Plus
Howard, Russell; Thernisien, Arnaud; Vourlidas, Angelos et al

Conference (2011, December 08)

The SoloHI instrument on Solar Orbiter and the WISPR instrument on Solar Probe+ will make white light coronagraphic images of the corona as the two spacecraft orbit the Sun. The minimum perihelia for ... [more ▼]

The SoloHI instrument on Solar Orbiter and the WISPR instrument on Solar Probe+ will make white light coronagraphic images of the corona as the two spacecraft orbit the Sun. The minimum perihelia for Solar Orbiter is about 60 Rsun and for SP+ is 9.5 Rsun. The wide field of view of the WISPR instrument (about 105 degrees radially) corresponds to viewing the corona from 2.2 Rsun to 20 Rsun. Thus the entire Thomson hemisphere is contained within the telescope’s field and we need to think of the instrument as being a traditional remote sensing instrument and then transitioning to a local in-situ instrument. The local behavior derives from the fact that the maximum Thomson scattering will favor the electron plasma close to the spacecraft - exactly what the in-situ instruments will be sampling. SoloHI and WISPR will also observe scattered light from dust in the inner heliosphere, which will be an entirely new spatial regime for dust observations from a coronagraph, which we assume to arise from dust in the general neighborhood of about half way between the observer and the Sun. As the dust grains approach the Sun, they evaporate and do not contribute to the scattering. A dust free zone has been postulated to exist somewhere inside of 5 Rsun where all dust is evaporated, but this has never been observed. The radial position where the evaporation occurs will depend on the precise molecular composition of the individual grains. The orbital plane of Solar Orbiter will gradually increase up to about 35 degrees, enabling a very different view through the zodiacal dust cloud to test the models generated from in-ecliptic observations. In this paper we will explore some of the issues associated with the observation of the dust and will present a simple model to explore the sensitivity of the instrument to observe such evaporations. [less ▲]

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See detailLa gouvernance environnementale au Sri Lanka
Rosillon, Caroline ULg

Poster (2011, December 08)

Detailed reference viewed: 48 (27 ULg)
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See detailSpa au XVIIIe siècle: les chemins croisés de l'écriture
Droixhe, Daniel ULg

Conference given outside the academic context (2011)

We follow those authors, artists, political and fashionable figures into their meetings, business, love affairs etc. in the "Café de l'Europe": Trenck, Anna-Amélia von Prussia, Marmontel, Marigny ... [more ▼]

We follow those authors, artists, political and fashionable figures into their meetings, business, love affairs etc. in the "Café de l'Europe": Trenck, Anna-Amélia von Prussia, Marmontel, Marigny, Bassompierre, Henry Ellis, Philippe Fermin, Alfieri, Needham; Clootz, Fragonard, Grimm, Henry von Prussia, Raynal, Grimm, Shelburne, the "beau" Lauzun, Sarah Lennox, the princess Czartoryska, Le Gendre, Ketterlin, Gallien de Salmorenc, Mercy-Argenteau, the couple Guéménée, the duchess Polignac, Georgiana Spencer,etc. [less ▲]

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See detailLes méthodes de datation appliquées à l’archéologie du bâti
Blain, Sophie ULg

Scientific conference (2011, December 08)

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See detailCaractérisation des coposés volatils des huiles d'olive produites dans des coopératives de la région orientale du Maroc
Tanouti, K.; Serghini-Caid, H.; Sindic, Marianne ULg et al

in 5èmes Journées Internationales d'Etude sur les Lipides - JIEL 2011 : Graisses alimentaires, Lipides marins, Nutrition et Santé (2011, December 08)

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See detailThe secrets of the Kinect ... in depth!
Lejeune, Antoine ULg; Van Droogenbroeck, Marc ULg; Verly, Jacques ULg

Conference (2011, December 08)

The slides present the Kinect in depth. The major technological ideas are explained. In addition, the presentation gives an overview of all the libraries available to interface to the Kinect.

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See detailSafety of long-term treatment of HAM/TSP patients with valproic acid
Olindo, Stéphane; Belrose, Gildas; Gillet, Nicolas ULg et al

in Blood (2011), 118(24), 6306-6309

HTLV-Associated Myelopathy/Tropical Spastic Paraparesis (HAM/TSP) is a neurodegenerative disease of the central nervous system induced by Human T lymphotropic virus type 1 (HTLV-1). As a potential ... [more ▼]

HTLV-Associated Myelopathy/Tropical Spastic Paraparesis (HAM/TSP) is a neurodegenerative disease of the central nervous system induced by Human T lymphotropic virus type 1 (HTLV-1). As a potential therapeutic approach, we previously suggested reducing the proviral load (PVL) by modulating lysine deacetylase activity using valproic acid (VPA) and exposing virus-positive cells to the host immune response. We conducted a single-center, two-year open-label trial, with 19 HAM/TSP volunteers treated with oral VPA. PVL, CD38/HLA-DR expression and CD8+ lysis efficiency were not significantly affected by VPA. Mean scores of HAM/TSP disability did not differ between baseline and final visit. Walking Time Test (WTT) increased significantly (>20%) in 3 patients and was in keeping with minor VPA side effects (drowsiness and tremor). WTT improved rapidly after VPA discontinuation. We conclude that long term treatment with VPA is safe in HAM/TSP. [less ▲]

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See detailFormation à la microtomographie
Léonard, Angélique ULg; Toye, Dominique ULg; Plougonven, Erwan ULg

Learning material (2011)

This course is a two-day presentation of the basic workings of X-ray tomography, current local applications of microtomography in the applied chemistry department, typical image analysis tools for ... [more ▼]

This course is a two-day presentation of the basic workings of X-ray tomography, current local applications of microtomography in the applied chemistry department, typical image analysis tools for extracting measurements, and a practical look at a particular piece of equipment, the Skyscan 1172 desktop microtomograph, and its software. The target audience is users of such equipment, with little to no background in X-ray physics, computer science or image analysis. [less ▲]

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See detailLe CV du chercheur. Évaluation et valeur comparative
Dozo, Björn-Olav ULg; Fréché, Bibiane

Scientific conference (2011, December 08)

Detailed reference viewed: 29 (5 ULg)
See detailAurores sur les planètes géantes
Bonfond, Bertrand ULg

Scientific conference (2011, December 08)

Depuis les premières détections d'émissions aurorales par les sondes Voyager à la fin des années 70, nos connaissances des aurores de Jupiter et de Saturne ont considérablement progressé. Je présenterai ... [more ▼]

Depuis les premières détections d'émissions aurorales par les sondes Voyager à la fin des années 70, nos connaissances des aurores de Jupiter et de Saturne ont considérablement progressé. Je présenterai ici quelques uns des derniers résultats obtenus à l'aide du télescope spatial Hubble et de la sonde Cassini en orbite autour de Saturne. Ces images acquises dans le domaine ultraviolet révèlent une complexité que l'on commence seulement à appréhender. Assemblées en séquences, elles dévoilent une dynamique surprenante. Flashs, pulsations, expansions, contractions, apparitions, disparitions, fusions, séparations et mouvements relatifs de structures étendues sur des dizaines de milliers de kilomètres ou localisés sur quelques centaines de kilomètres : la diversité des comportements que nous observons est le témoignage de la richesse des processus en œuvre dans les magnétosphères de Jupiter et Saturne. Lunes exotiques, volcans et geysers colossaux, champs magnétiques gigantesques et rotations planétaires rapides sont les ingrédients de ce surprenant laboratoire de physique des plasmas. [less ▲]

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See detailLe projet de recherches SAFE
Marique, Anne-Françoise ULg; De Meester, Tatiana; De Herde, André et al

Poster (2011, December 08)

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See detailLe trasformazioni della "Peripèteia"
Cigana, Lorenzo ULg

Scientific conference (2011, December 07)

An analysis of the notion of "peripèteia" in Aristotle's Poetics: is it a narratologic, formal category or an interpretative one?

Detailed reference viewed: 15 (2 ULg)
See detailDesign of reversibly disulfide core cross-linked polymer micelles
Cajot, Sébastien ULg; Schol, Daureen ULg; Danhier, F. et al

Poster (2011, December 07)

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See detailComment programmer un système neuronal avec un langage et une conscience ?
Dubois, Daniel ULg

in Acta Europeana Systemica (2011, December 07), 1

This communication deals with the question to know if this is possible to program a neural system with a language and a consciousness. There are several levels and categories of language, by example ... [more ▼]

This communication deals with the question to know if this is possible to program a neural system with a language and a consciousness. There are several levels and categories of language, by example, verbal and non-verbal languages, signs language, etc. There are also several levels and categories of consciousness, by example, verbal consciousness, non-verbal selfconsciousness, and absence of consciousness with the a-consciousness. By a systemic approach, we extend the role of the brain to the whole neural ectoderm, including the nervous systems, the brainstem, the brain, and the skin that is the actual envelope of the brain to the environment. This paper will demonstrate that such a neural system can be programmed, on the basis of scientific research in experimental neurosciences and in artificial intelligence, extending de facto all the possibilities of learning of classical neural networks. [less ▲]

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See detailEfficiently Approximating Markov Tree Bagging for High-Dimensional Density Estimation
Schnitzler, François ULg

Scientific conference (2011, December 07)

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See detailEffective conservation of an endangered newt species (Triturus cristatus): determinants from local to landscape scales
Denoël, Mathieu ULg; Perez, Amélie; Ficetola, Francesco

Conference (2011, December 07)

Detailed reference viewed: 64 (7 ULg)