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See detailFish lateral system is required for accurate control of shoaling behaviour
Faucher, Karine ULg; Parmentier, Eric ULg; Becco, Christophe ULg et al

Conference (2010)

In teleost fishes, the lateral system is assumed to contribute, among other roles, to maintaining schooling behaviour. Sight is also assumed to play a role in schooling, as fish with a cut lateral line do ... [more ▼]

In teleost fishes, the lateral system is assumed to contribute, among other roles, to maintaining schooling behaviour. Sight is also assumed to play a role in schooling, as fish with a cut lateral line do not stop schooling unless they are also blinded. This conclusion, however, was based on experiments where only the trunk lateral line was inactivated, leaving the head lateral system intact. Here the aim was to test how inactivation of the whole lateral system affects the fish shoaling behaviour. Groups of firehead tetras, Hemigrammus bleheri, were video-recorded before and after inactivation of their whole lateral system with aminoglycoside antibiotics (and also in sham-treated specimens). Shoaling behaviour was characterized by: nearest distance to the first, second, and third neighbour, shoal radius, shoal order parameter, and the number of collisions between individuals. SEM observations showed damage to most superficial neuromasts as a result of antibiotic treatment. Importantly, the antibiotic-treated fish proved unable to maintain a shoal. After the end of the treatment, however, they recovered both a normal tissue morphology and normal shoaling behaviour within about a month. The lateral system is thus more crucial to shoaling behaviour than previously believed. [less ▲]

Detailed reference viewed: 66 (10 ULg)
See detailAffective valence and false memoires in Aging
Dehon, Hedwige ULg; laroi, Frank; van der Linden, Martial

Conference (2010)

Detailed reference viewed: 11 (0 ULg)
See detailFuran formation in baby food model systems from vitamin C and unsaturated fatty acids
Owczarek-Fendor, Agnieszka; De Meulenaer, Bruno; Scholl, Georges ULg et al

Conference (2010)

Detailed reference viewed: 58 (17 ULg)
Peer Reviewed
See detailAnalyse invasive versus analyse par faisceaux d'ions pour déterminer les sources géologiques de pigments préhistoriques de la grotte du Renne à Arcy-sur-Cure (Yonne, France)
Salomon, Hélène ULg; Beck, Lucile; Coquinot, Yvan et al

Conference (2010)

La grotte du Renne à Arcy-sur-Cure a été le théâtre d'occupations tardives par les derniers Néandertaliens, il y a environ 34 000 ans, soit avant l'apparition de l'art pariétal. Ils y ont utilisé d ... [more ▼]

La grotte du Renne à Arcy-sur-Cure a été le théâtre d'occupations tardives par les derniers Néandertaliens, il y a environ 34 000 ans, soit avant l'apparition de l'art pariétal. Ils y ont utilisé d'importantes quantités de roches pigmentées rouges et noires respectivement riches en fer et en manganèse. Les roches pigmentées ont été réduites en poudre soit par broyage, soit par abrasion, opération qui a produit des facettes d'usure sur les blocs. Le but de l'utilisation de ces matériaux n'est pas connu puisque Neandertal n'a laissé aucun témoignage de préoccupation esthétique. Rechercher les modalités d'acquisition des matières premières colorantes permet de connaître l'aire géographique fréquentée par ces hommes fossiles et de percevoir les propriétés de ces matériaux que les Néandertaliens désiraient exploiter. La caractérisation de ces matériaux s'est faite dans un premier temps par des méthodes de pétrographie traditionnelle impliquant le prélèvement parfois conséquent dans les matières colorantes archéologiques (prélèvement réduit en poudre pour la diffraction des rayons X, coupes pour faire des lames minces observées au microscope pétrographique). Ces investigations ont permis de distinguer deux sources d'approvisionnement en matières colorantes riches en oxydes de fer situées dans un rayon de 10 km autour de la grotte. Dans un second temps, la mise en place d'un protocole d'analyses non invasives visait à obtenir autant, voire plus, d'informations sur ces vestiges désormais connus, sans le moindre prélèvement. L'analyse par PIXE a permis de déterminer les éléments majeurs et les éléments traces marqueurs des groupes géologiques. Elle a pu être appliquée à la fois aux blocs bruts et aux blocs facettés pour lesquels les prélèvements sont impossibles. Les différentes sources de matières premières identifiées dans un premier temps par pétrographie, sont dans l'ensemble confirmées par PIXE. Mais une troisième source de roches rouges est à suspecter, ce que la pétrographie n'avait pas permis de déterminer. [less ▲]

Detailed reference viewed: 19 (1 ULg)
See detailLeadership et genre : le piège des compétences sexuées
Cornet, Annie ULg

Conference (2010)

Detailed reference viewed: 45 (7 ULg)
See detail"Giant Planets Aurorae" - Europlanet RI Science Case in the Working Packages
Rucker, M Scherf H O; Blanc, M.; André, N. et al

Conference (2010)

Not Available

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailComprehensive geriatric assessment : are the interRAI Acute care and the Minimum geriatric screening tool complements or substitutes ?
Wellens, N; Deschodt, M; Boman, X et al

Conference (2010)

Detailed reference viewed: 24 (2 ULg)
See detailSaturn's polar auroral emissions
Radioti, Aikaterini ULg; Gérard, Jean-Claude ULg; Grodent, Denis ULg et al

Conference (2010)

Not Available

Detailed reference viewed: 1 (0 ULg)
Peer Reviewed
See detailDiversity Management in Belgium
Cornet, Annie ULg; Zanoni

Conference (2010)

Detailed reference viewed: 20 (4 ULg)
Peer Reviewed
See detailOptimal design for functional magnetic resonance imaging (fMRI) experiments based on linear models
Maus, Bärbel ULg; van Breukelen, Gerard J P; Goebel, R et al

Conference (2010)

In the first part of this presentation it will be shown how the general linear model is used to describe experimental functional magnetic resonance imaging (fMRI) data from one subject. Functional ... [more ▼]

In the first part of this presentation it will be shown how the general linear model is used to describe experimental functional magnetic resonance imaging (fMRI) data from one subject. Functional magnetic resonance imaging is a neuroimaging method which is used to study the human brain and its functional areas. Based on the general linear model, optimal designs for one-subject fMRI experiments can be obtained by application of the D- and A-optimality criterion. Because of the huge design space for fMRI experiments, a genetic algorithm (GA) is employed to find optimal designs for fMRI experiments based on a multi-objective design criterion. The second part of the presentation will focus on the application of mixed effects models in analysis of fMRI experiments from multiple subjects. Optimal designs for multi-subject experiments are considered and the optimal combination of number of subjects and fMRI scanner time/imaging time per subject will be studied with respect to a linear cost function. [less ▲]

Detailed reference viewed: 22 (0 ULg)
See detailIntermittent thermal manipulations of broiler embryos during late incubation and their immediate and long-lasting effects
Willemsen, Hilke; Li, Yue; Witters, Anouck et al

Conference (2010)

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailProcess mineralogy and automated phase identification in mixed copper ores at Kansanshi (Zambia)
Kottgen; Bastin, David ULg; Dufrane, Florent et al

Conference (2010)

Detailed reference viewed: 16 (0 ULg)
See detailVanadium oxide-based mesoporous films as positive electrode material in Li-ion batteries
Krins, Natacha ULg; Caes, Sébastien ULg; Arrebola, José-Carlos et al

Conference (2010)

Detailed reference viewed: 8 (2 ULg)
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Peer Reviewed
See detailInfluence of the viscosity on liquid hold-up in modular catalytic packings
Aferka, Saïd ULg; Viva, Aurora ULg; Brunazzi, Elisabetta et al

Conference (2010)

Detailed reference viewed: 27 (3 ULg)
Peer Reviewed
See detailY'a-t-il des missionnaires congolais en Belgique
Demart, Sarah ULg

Conference (2010)

Detailed reference viewed: 17 (0 ULg)
Peer Reviewed
See detailDo faces capture attention in a bottom-up fashion? An eye-movement study
Devue, Christel ULg; Belopolsky, Artem; Theeuwes, Jan

Conference (2010)

Due to their high social and biological significance, faces should be able to capture attention in a bottom-up fashion. Accordingly, a recent visual search study showed that the presence of an upright ... [more ▼]

Due to their high social and biological significance, faces should be able to capture attention in a bottom-up fashion. Accordingly, a recent visual search study showed that the presence of an upright distractor face slows down the search for a butterfly target while the presence of a butterfly distractor does not affect the search for a target face (Langton et al., 2008). To further test whether upright faces automatically capture attention we recorded eye movements during a cued target search task. We show that when the search alternates between a face and a butterfly target (Experiment 1), faces are found faster and with less saccades than butterflies. The presence of the opposite distractor within the display (e.g. a face during a butterfly search) slows down the search but to a higher extent when the distractor is a face. Similarly, faces capture the eyes more frequently than butterflies. In a control experiment inverted face targets were also found more efficiently than inverted butterfly targets and captured the eyes more frequently than butterflies when presented as distractors (Experiment 2). However, when upright or inverted faces were always presented as irrelevant distractors (Experiment 3), we could not found any sign of disruption caused by their presence during a search for butterfly or flower targets. These results challenge the view that faces capture attention automatically. Rather, they suggest that faces only attract attention when their processing is relevant during the search task and that they can otherwise be ignored. [less ▲]

Detailed reference viewed: 50 (3 ULg)
See detailLes traces de vie au Précambrien et la fossilisation
Javaux, Emmanuelle ULg

Conference (2010)

Detailed reference viewed: 33 (2 ULg)
See detailImaging techniques
Calvo Del Castillo, Helena ULg; Cervera Xicotencatl, Ariadna; Oger, Cécile

Conference (2010)

Detailed reference viewed: 19 (3 ULg)
Peer Reviewed
See detailImplementation of micropollutant fate in wastewater treatment plant benchmark simulation models
Pons, Marie-Noëlle; Louvet, Jean-Noël ULg; Potier, Olivier

Conference (2010)

Detailed reference viewed: 26 (1 ULg)
See detailChronology of the Middle to Upper Palaeolithic Transition in Belgium
Pirson, S.; Haesaerts, P.; Semal, P. et al

Conference (2010)

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailTrade Union implication in the sustainable development:global position and contingent situations
Robert, Jocelyne ULg

Conference (2010)

This article presents Sustainibility Development in relation to the Social responsibility. In this context we analyze relationship between trade-unions and sustainable development in Belgium. Which ... [more ▼]

This article presents Sustainibility Development in relation to the Social responsibility. In this context we analyze relationship between trade-unions and sustainable development in Belgium. Which involvement of th trade-unions in environment protection, work quality and benefit notion. Which actors and relations between the actors? Wich obstacles during the appropriation of the sustainable development by the trade-unions. [less ▲]

Detailed reference viewed: 42 (21 ULg)
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See detailModeling post-combustion CO2 capture with amine solvents
Léonard, Grégoire ULg; Heyen, Georges ULg

Conference (2010)

Oral communication at the Cape-forum, Aachen, 2010. Modeling CO2 capture process and optimization of some process parameters with an equilibrium-based model.

Detailed reference viewed: 39 (6 ULg)
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Peer Reviewed
See detailEdad de las esporas de la Formacion Los Espejos, Silurico de la Precordillera de San Juan, Argentina
Rubinstein, Claudia; Muro, V.J.; Steemans, Philippe ULg

Conference (2010)

Detailed reference viewed: 38 (4 ULg)
See detailUVIS FUV spectra of Saturn’s aurora
Gustin, Jacques ULg; Gérard, Jean-Claude ULg; Grodent, Denis ULg et al

Conference (2010)

Detailed reference viewed: 11 (0 ULg)
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See detailOptimal design of a CO2 absorption unit and assessment of solvent degradation
Léonard, Grégoire ULg

Conference (2010)

Presentation of the main research fields of my PhD thesis at the University of Liège

Detailed reference viewed: 21 (5 ULg)
See detailExpériences belges en matière d’équité salariale
Cornet, Annie ULg

Conference (2010)

Detailed reference viewed: 45 (4 ULg)
Peer Reviewed
See detailUnlock sytemic locking? From conversion towards transition
Stassart, Pierre M ULg

Conference (2010)

The potential sectoral (food chain) transition approach suffers from a strong regimen’s irreversibility. In this paper we consider the question of cooperation regime transformation. Indeed in our case ... [more ▼]

The potential sectoral (food chain) transition approach suffers from a strong regimen’s irreversibility. In this paper we consider the question of cooperation regime transformation. Indeed in our case, the lock-in issue also proved to have a professional dimension linked to the cooperation regime. While the “filière” quality convention (Gomez 1994) could re-frame the traditional relationships between different members of the “filière,” this potential transformation was blocked by the strongest professional/sectoral convention. Professional conventions (Allaire 2004) are competency conventions that define and qualify “good” work within a set of rules. Professional conventions may be destabilized by transforming legitimacy systems through a territorial (rather than sectoral) approach and as a consequence start to overcome the socio-technical lock-in. Interactions between weak pressure at the landscape (macro) level (EU), niche (micro) level, and knowledge coming from the previous intervention research created space for regime destabilization (Geels & Schot 2007b). Local stakeholders (institutions) joined with local actors (consumers-citizens, and naturalists) to create room for a learning process and let the “Gaume Grassland Steer” niche experiment emerge. [less ▲]

Detailed reference viewed: 18 (0 ULg)
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See detailMisery Loves Company : Beauty Contest Dynamics in Exchange Rate Expectations
Muller, Aline ULg; Pancotto, Francesca ULg

Conference (2009, December 18)

Detailed reference viewed: 72 (15 ULg)
See detailRegional analgesia
Brichant, Jean-François ULg

Conference (2009, December 18)

Detailed reference viewed: 12 (2 ULg)
See detailLa déontologie de l'information
Vanesse, Marc ULg

Conference (2009, December 17)

Journée de réflexion sur la déontologie de l'information avec plusieurs intervenants : un juge d'instruction, un journaliste d'investigation, le secrétaire général de l'Association des journalistes ... [more ▼]

Journée de réflexion sur la déontologie de l'information avec plusieurs intervenants : un juge d'instruction, un journaliste d'investigation, le secrétaire général de l'Association des journalistes professionnels, l'auteur d'une recherche sur la caméra cachée. [less ▲]

Detailed reference viewed: 43 (7 ULg)
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See detailLaboratoire et allergologie : nouvelles applications
Gadisseur, Romy ULg; Cavalier, Etienne ULg

Conference (2009, December 17)

Detailed reference viewed: 15 (0 ULg)
See detailImages et inscriptions: la représentation de la guerre selon Harun Farocki
Hamers, Jérémy ULg

Conference (2009, December 16)

Detailed reference viewed: 14 (0 ULg)
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Peer Reviewed
See detailMisery loves company beauty contest dynamics in exchange rates expectations
Muller, Aline ULg; Pancotto, Francesca

Conference (2009, December 16)

Detailed reference viewed: 7 (0 ULg)
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See detailLes norovirus: nouveaux agents entéropathogènes.
HUYNEN, Pascale ULg; Mathijs, Elisabeth

Conference (2009, December 15)

Detailed reference viewed: 16 (0 ULg)
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See detailElastofibrome dorsal
TOMASELLA, Marco ULg

Conference (2009, December 14)

Detailed reference viewed: 5 (0 ULg)
See detailThe Spatial Morphology of Equatorial Electron Beams Near Io
Jacobsen, S.; Saur, J. S.; Neubauer, F. M. et al

Conference (2009, December 14)

The Galileo spacecraft observed energetic field-aligned electron beams very close to Io during several flybys. We apply a three-dimensional magnetohydrodynamic (MHD) model of the far-field Io-Jupiter ... [more ▼]

The Galileo spacecraft observed energetic field-aligned electron beams very close to Io during several flybys. We apply a three-dimensional magnetohydrodynamic (MHD) model of the far-field Io-Jupiter interaction to simulate for the first time the location and spatial shape of field-aligned electron beams. Io continuously generates MHD waves by disturbing the Jovian magnetoplasma. Currents carried by Alfvén waves propagate predominantly along the magnetic field lines. As the number of charge carriers decreases along the travelpath, electrons are accelerated towards Jupiter. These energetic electrons precipitate into the Jovian ionosphere, visible as prominent Io footprint (IFP) emission. Electrons are also accelerated towards Io and form the equatorial beams observed by the Galileo spacecraft. Unlike the beam formation, the position and spatial structure of these beams has not been addressed in detail before. We use a 3D MHD model with initial conditions corresponding to the individual Galileo flyby and determine the spatial morphology of the beams in Io's orbital plane. Our results are in good agreement with the Galileo observations. We find that the ratio of the one-way traveltime of the Alfvén wave from Io to Jupiter and the convection time of the plasma past the obstacle controls the location of the beams. This leads to the conclusion that at other satellites with other plasma environments, e.g. Ganymede, Callisto, Europa and Enceladus, the electron beams might not be close to the satellite, but can be shifted significantly downstream along its plasma wake. Thus, the future search for field-aligned electron populations near a satellite should be further extended to the wake region. [less ▲]

Detailed reference viewed: 10 (2 ULg)
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See detailPrediction of genetic interactions in yeast using machine learning
Schrynemackers, Marie ULg

Conference (2009, December 14)

Detailed reference viewed: 10 (3 ULg)
See detailSummary of aim and achievements in Work Package 7 "Functional Coatings"
Jérôme, Christine ULg

Conference (2009, December 14)

Detailed reference viewed: 11 (3 ULg)
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See detailResistencia desquiciada en El ejército iluminado de David Toscana
Vanden Berghe, Kristine ULg

Conference (2009, December 13)

Detailed reference viewed: 32 (4 ULg)
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Peer Reviewed
See detailTree based ensemble models regularization by convex optimization
Cornélusse, Bertrand ULg; Geurts, Pierre ULg; Wehenkel, Louis ULg

Conference (2009, December 12)

Tree based ensemble methods can be seen as a way to learn a kernel from a sample of input-output pairs. This paper proposes a regularization framework to incorporate non-standard information not used in ... [more ▼]

Tree based ensemble methods can be seen as a way to learn a kernel from a sample of input-output pairs. This paper proposes a regularization framework to incorporate non-standard information not used in the kernel learning algorithm, so as to take advantage of incomplete information about output values and/or of some prior information about the problem at hand. To this end a generic convex optimization problem is formulated which is first customized into a manifold regularization approach for semi-supervised learning, then as a way to exploit censored output values, and finally as a generic way to exploit prior information about the problem. [less ▲]

Detailed reference viewed: 127 (36 ULg)
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See detailLaboratoire et allergologie : nouvelles applications
Gadisseur, Romy ULg; Cavalier, Etienne ULg

Conference (2009, December 11)

Detailed reference viewed: 14 (1 ULg)
See detailCommencer par la fin. La radicalité dans le théâtre du Groupov
Delhalle, Nancy ULg

Conference (2009, December 11)

Detailed reference viewed: 28 (3 ULg)
Peer Reviewed
See detailNavigating Polyfunctionality in the Lexicon
Grossman, Eitan; Polis, Stéphane ULg

Conference (2009, December 10)

Detailed reference viewed: 8 (1 ULg)
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See detailEvolution des pratiques d'évaluation : le cas des sciences astrophysiques
Surdej, Jean ULg

Conference (2009, December 10)

Detailed reference viewed: 32 (15 ULg)
Peer Reviewed
See detailNeural correlates of personal goal processing when envisioning future events
D'Argembeau, Arnaud ULg

Conference (2009, December 10)

Detailed reference viewed: 9 (2 ULg)
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See detailForeseeing nitrate concentration in groundwater: A review of available modelling approaches
Orban, Philippe ULg; Brouyère, Serge ULg

Conference (2009, December 10)

In the scientific community, increasing concerns on groundwater quality and quantity have motivated the development of numerical models for groundwater management since the 1970’s. Mathematical and ... [more ▼]

In the scientific community, increasing concerns on groundwater quality and quantity have motivated the development of numerical models for groundwater management since the 1970’s. Mathematical and numerical models are, for example, promising tools for prediction of concentration and they can be used to make the dynamic link between nitrogen manure and the resulting evolution of nitrate concentration in groundwater. However, from a practical and managerial perspective, there have been very few real attempts of developing efficient calibrated and validated transport models in particular at the scale of the groundwater body, which is the management unit of groundwater resource in the European Union. Actually two main challenges remains, (1) performing numerical tools are not really available and (2) parametrisation of such transport models at the regional scale is difficult due to the large amount of data required. Generally speaking models can be grouped in different categories ranging from black box models to physically based distributed models. The black box models such as transfer function are simple but attractive because they require relatively less data but with the drawback that modelling result are not spatially distributed while the predictive capability of these models is questionable due to the semi-analytical nature of the process descriptions. On the contrary, physically based distributed model require more data but, due to a more advanced description of ongoing processes, such models are expected to have better predictive capabilities than the black box models. Black box model and physically based distributed model approaches have all proved their utilities and have all their justifications, advantages and disadvantages regarding the development of regional scale groundwater model. A new flexible methodology (the Hybrid Finite Element Mixing Cell method) has been developed that allows combining in a single model, and in a fully integrated way, different mathematical approaches of various complexities for groundwater in complex environment. This method has been implemented in the SUFTD, a finite element groundwater flow and solute transport numerical model. Combining on the one hand the use of a spatially distributed groundwater flow and solute transport model taking advantages of this Hybrid Finite Element Mixing Cell Approach method and on the other hand spatial datasets of tritium and nitrate contents, an illustration on the problem of nitrate trend assessment and forecasting for an important groundwater resource located in the Geer groundwater body (480 km²) in the Walloon Region of Belgium will be proposed. [less ▲]

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See detailLa prédation
Sibony, Anne-Lise ULg

Conference (2009, December 09)

Detailed reference viewed: 43 (3 ULg)
See detailDes forêts et campagnes à la ville : les animaux et leurs choix
Strivay, Lucienne ULg; Mougenot, Catherine ULg

Conference (2009, December 07)

Detailed reference viewed: 15 (3 ULg)
See detailJustice et politique dans l’exorde du discours de Lycurgue Contre Léocrate
Vanhaegendoren, Koen ULg

Conference (2009, December 07)

Detailed reference viewed: 20 (2 ULg)
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See detailSurveillance en ligne d'une machine tournante par thermographie infrarouge
Leemans, Vincent ULg; Destain, Marie-France ULg

Conference (2009, December 07)

Des mesures par thermographie d'une machine tournante critique (ventilateur) sont réalisées en ligne pour évaluer la température d’organes, comme le moteur et les paliers. En conditions de fonctionnement ... [more ▼]

Des mesures par thermographie d'une machine tournante critique (ventilateur) sont réalisées en ligne pour évaluer la température d’organes, comme le moteur et les paliers. En conditions de fonctionnement normal, les températures montrent des variations importantes, caractérisées par un écart­-type de l’ordre de 5 °C. Elles sont liées aux variations de conditions climatiques et à l'apport de chaleur variable en fonction du processus de fabrication. Un modèle auto­récurrent avec grandeurs d'entrée (ARX) a permis d'éliminer ces variations. Le bruit sur la température corrigée est réduit à un degré Celsius, ce qui permet de mettre en évidence très tôt une dégradation au niveau des paliers principaux. Par contre, dans le cas présent, le moteur subit un encrassement et donc une augmentation de température en cours de fonctionnement qui masque l’existence d’une éventuelle détérioration. [less ▲]

Detailed reference viewed: 93 (14 ULg)
See detailProblème des karsts en roches silicatées... lacunes d’observation et paradigme du karst
Willems, Luc ULg; Ek, Camille ULg; Rodet, Joël et al

Conference (2009, December 05)

Depuis le développement de la karstologie, la grande majorité des cavités prospectées l'ont été dans les roches carbonatées ou apparentées, réputées fort solubles. Partant de ce principe, les autres ... [more ▼]

Depuis le développement de la karstologie, la grande majorité des cavités prospectées l'ont été dans les roches carbonatées ou apparentées, réputées fort solubles. Partant de ce principe, les autres lithologies n'ont été à ce jour que partiellement investiguées puisque réputées peu ou pas solubles. Pourtant, depuis plusieurs siècles, des grottes et autres formes apparentées sont mentionnées notamment dans des grès, des granites ou les quartzites. Très rapidement, elles ont été catégorisées comme pseudokarst en se basant sur deux principes, le premier, la convergence de forme, le second, les processus physico-chimiques qui présideraient à leur formation seraient différents de ceux rencontrés dans les calcaires. L'évolution des recherches et des techniques de ces vingt dernières années ouvre de nouvelles perspectives sur une réalité karstique commune qui transcenderait les lithologies tant carbonatées que non carbonatées. Peu à peu, elle oblige les chercheurs à se repositionner quant à la notion de karst. [less ▲]

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See detailKarsts dans les gneiss - alvéoles géantes et micro-alvéoles dans la région de Milagres, état de Bahia, Brésil
Rodet, Joël; Willems, Luc ULg; Auler, Augusto

Conference (2009, December 05)

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See detailPour une esthétique de la vérité: De Kant à Kant en passant par Bachelard
Pieron, Julien ULg

Conference (2009, December 04)

Detailed reference viewed: 18 (6 ULg)
See detailRéentraînement/reconditionnement et troubles cognitifs: les réserves cognitives
Adam, Stéphane ULg

Conference (2009, December 04)

Detailed reference viewed: 5 (1 ULg)
See detailThe neural basis of short-term memory and attention : neuropsychology and fMRI
Majerus, Steve ULg

Conference (2009, December 04)

Detailed reference viewed: 4 (0 ULg)
See detailAdding sound to movies: Historical trends and new challenges of 3D cinema
André, Cédric ULg; Embrechts, Jean-Jacques ULg; Verly, Jacques ULg

Conference (2009, December 03)

Very little research has been done so far in producing 3D sound and audio that are consistent with the 3D stereo video being viewed by the spectator. After a review of the currently used techniques for ... [more ▼]

Very little research has been done so far in producing 3D sound and audio that are consistent with the 3D stereo video being viewed by the spectator. After a review of the currently used techniques for theater sound reproduction, this talk presents new challenges of 3D cinema in terms of sound reproduction and analyse which known 3D audio techniques are able to tackle those challenges. [less ▲]

Detailed reference viewed: 154 (29 ULg)
See detailLes conditions générales en droit de la construction
Kohl, Benoît ULg; Salzburger, Romain ULg

Conference (2009, December 03)

Detailed reference viewed: 30 (5 ULg)
See detailMapping baseline soil content in pollutants in urbanized and industrialized areas in the Walloon region: development of a sampling methodology for the Pollusol 2 survey (SPAQuE)
Peirera, Benoit; Schneider, Arnaud; Titeux, Hugues et al

Conference (2009, December 02)

Detailed reference viewed: 24 (2 ULg)
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See detailMapping of soil-sediment systems contaminations around a metal-ore smelter. The example of Cu in Lubumbashi (R.D. Congo)
Mpundu, Michel; Kaya Muyumba, Donato ULg; N'gongo, Michel et al

Conference (2009, December 02)

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See detailSecretion and maturation of toxins in the venom duct of Conustextile
Dobson, Rowan ULg; Corbesier, Corine; Collodoro, Mike et al

Conference (2009, December 02)

Detailed reference viewed: 22 (6 ULg)
Peer Reviewed
See detailAn initial investigation of the magnetosphere at a system level using auroral oval radius and ring current intensity as state variables
Milan, S. E.; Hutchinson, J.; Boakes, P. D. et al

Conference (2009, December 01)

One approach to understanding the magnetosphere at a system level is to select a number of magnetospheric state variables and to examine statistically their inter-relationships and the temporal evolution ... [more ▼]

One approach to understanding the magnetosphere at a system level is to select a number of magnetospheric state variables and to examine statistically their inter-relationships and the temporal evolution of the magnetosphere through state-space. This talk outlines a first attempt at such a study, using the radius of the auroral oval, a proxy for the open flux content of the magnetosphere, and the Sym-H index, a measure of the intensity of the ring current, as the primary state variables. Using observations from the two-year period June 2000 to May 2002, the response of the state of the magnetosphere to differing solar wind inputs, and the evolution of the system state during geomagnetic storms is investigated. Our main finding is a characteristic evolution of magnetospheric state through the initial, main, and recovery phases of geomagnetic storms. We discuss our findings within the context of the expanding/contracting polar cap paradigm, in terms of a modification of substorm onset conditions by the magnetic perturbation associated with the ring current. [less ▲]

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See detailContinuous Characterization of Growth Phase Using Ground Optical and Magnetic Data
Connors, M. G.; Lerner, R.; Fillingim, M. O. et al

Conference (2009, December 01)

The growth phase of substorms is characterized by equatorward motion of the auroral oval as manifested by optical emissions and the electrojet currents detected on the ground through magnetic ... [more ▼]

The growth phase of substorms is characterized by equatorward motion of the auroral oval as manifested by optical emissions and the electrojet currents detected on the ground through magnetic perturbations. We will demonstrate the use of an inversion procedure for magnetic data that follows the optical borders detected in the CANOPUS Churchill meridian well. Multispectral meridian scanning photometry allows identification of 486 nm H-beta emission with the equatorward edge of the evening sector growth phase electrojet, consistent with downward field-aligned current at this location. The 630 nm and 557 nm emissions due to the precipitation of electrons are identified with the more poleward regions or the poleward border, and upward field-aligned current. While these results are already known, the use of magnetic data is a new way of continuously monitoring growth phase. The identifications are supported by satellite imaging from Image and POLAR in individual cases. Despite separation of the proton and electron emissions as observed from the ground, our results are consistent with the polar cap boundary determined using proton imaging by SI12 on Image. We have also confirmed precipitation region and FAC coincidence using FAST, and corrected the electrojet position when FAST did not fly directly over the ground array, based on imaging from the high altitude satellites. [less ▲]

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See detailLe rôle des représentations dans l’apprentissage des étudiants Erasmus
Meunier, Deborah ULg

Conference (2009, December)

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See detailVirgin and Politics: Marian Worship within the Society of Jesus
Delfosse, Annick ULg

Conference (2009, December)

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See detailSplit rank of two-row cuts
Louveaux, Quentin ULg

Conference (2009, December)

A simple relaxation consisting of two rows of a simplex tableau is a mixed-integer set with two equations, two free integer variables, and nonnegative continuous variables. Recently, Andersen et al. and ... [more ▼]

A simple relaxation consisting of two rows of a simplex tableau is a mixed-integer set with two equations, two free integer variables, and nonnegative continuous variables. Recently, Andersen et al. and Cornuéjols and Margot showed that the facet- defining inequalities of this set are either split cuts or intersection cuts obtained from lattice-free triangles and quadrilaterals. From an example given by Cook et al. it is known that one particular class of facet-defining triangle inequality does not have finite split rank. In this paper we show that all other facet-defining triangle and quadrilateral inequalities have finite split rank. [less ▲]

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See detailAddressing the Legacy Costs in Introducing NDC
Jousten, Alain ULg; Holzmann, Robert

Conference (2009, December)

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See detailInsect prenyltransferases: Characterization, roles in insect biology, and evolution
Cusson, Michel; Vandermoten, Sophie ULg; Barbar, Aline et al

Conference (2009, December)

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See detailLarge Margin Classification with the Progressive Hedging Algorithm
Defourny, Boris ULg; Wehenkel, Louis ULg

Conference (2009, December)

Several learning algorithms in classification and structured prediction are formulated as large scale optimization problems. We show that a generic iterative reformulation and resolving strategy based on ... [more ▼]

Several learning algorithms in classification and structured prediction are formulated as large scale optimization problems. We show that a generic iterative reformulation and resolving strategy based on the progressive hedging algorithm from stochastic programming results in a highly parallel algorithm when applied to the large margin classification problem with nonlinear kernels. We also underline promising aspects of the available analysis of progressive hedging strategies. [less ▲]

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See detailOne-piece zirconia implants : 18 months clinical outcomes.
VANHOUTTE, Vanessa ULg; LAMBERT, France ULg; ROMPEN, Eric ULg

Conference (2009, December)

Purpose : The aim of the present study was to evaluate prospectively the clinical outcomes of a prototype one-piece zirconia implants after a -18 month follow-up. Material and methods : 20 prototype one ... [more ▼]

Purpose : The aim of the present study was to evaluate prospectively the clinical outcomes of a prototype one-piece zirconia implants after a -18 month follow-up. Material and methods : 20 prototype one-piece zirconia implants were placed and immediately restored with provisional protheses. A flapless or a minimally invasive approach was used for every implant placement. Bone levels were recorded at baseline and -1 year. Surgical, biological and prosthetic complications were also assessed. Results : The study included 15 patients. Most of the implants (90%) were placed at the anterior maxilla. Six of the implant sites were previously augmented with autogenous bone block grafts, 8 were managed with socket preservation techniques, 3 implants were immediatly placed after extraction and one implant was placed simultanously with a guided bone regeneration. Insertion torque (> 30N/cm2) was reached for all implants. The implant survival and success rates reached respectively 100% and 95%. One implant abutment fractured at placement because of an excessive insertion torque (> 50 N/cm2). No further complication occurred. Conclusion : From the preliminary results of this prospective clinical study, one-piece zirconia implants seem to success after 1 year despite they were often placed in critical clinical situtations (bone augmentations) and immediately restored. Further follow-up is needed to evaluate the long-term outcomes. [less ▲]

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See detailFiscalité pour les juristes
Richelle, Isabelle ULg

Conference (2009, December)

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