References of "Scientific congresses and symposiums"
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Peer Reviewed
See detailAdvanced approaches in POPs analysis
Focant, Jean-François ULg

in RAFA 2009 Book of abstract (2009, November)

Detailed reference viewed: 9 (1 ULg)
Peer Reviewed
See detaile-demos, we show faculty what we got
Van de Poël, Jean-François ULg; Lecomte, Béatrice ULg

Conference (2009, November)

"How can I start, and what should I do?" The e-demos interface is our answer for faculty who request concrete examples of e-learning activities and want to know how to develop e-learning activities in ... [more ▼]

"How can I start, and what should I do?" The e-demos interface is our answer for faculty who request concrete examples of e-learning activities and want to know how to develop e-learning activities in their own contexts. [less ▲]

Detailed reference viewed: 32 (2 ULg)
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See detailBuitenlands familial statuut en vreemdelingenrecht: het ipr in het verdomhoekje?
Wautelet, Patrick ULg

Conference (2009, November)

This presentation attempts to uncover the influence of migration policy and law on the processes of private international law dealing with cross-border family relationships, using examples from Belgian ... [more ▼]

This presentation attempts to uncover the influence of migration policy and law on the processes of private international law dealing with cross-border family relationships, using examples from Belgian and Dutch practice. [less ▲]

Detailed reference viewed: 33 (1 ULg)
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Peer Reviewed
See detailThe POLYGAL project : optimization of food conservation using a combination of lactates and polyphenols.
Dure, Rémi ULg; Ladeuze, S.; Martin, E. et al

Poster (2009, November)

Detailed reference viewed: 70 (12 ULg)
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See detailLa mediation musicale en question
Lambeau, Céline ULg

Conference (2009, November)

Detailed reference viewed: 54 (2 ULg)
See detailFunctional characterization of glycolytic enzymes from Arabidopsis: do they only have a metabolic function?
Ros, Ros; Muñoz-Bertomeu, Jesús; Cascales - Miñana, Borja ULg et al

Conference (2009, November)

Detailed reference viewed: 1 (0 ULg)
See detailChronic bronchopulmonary diseases in dogs : an overview
Clercx, Cécile ULg

in Proceedings of the 55th Annual Conference of the German Small Animal Veterinary Association (2009, November)

Detailed reference viewed: 5 (0 ULg)
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See detailA technique for building databases of annotated and realistic human silhouettes based on an avatar
Pierard, Sébastien ULg; Van Droogenbroeck, Marc ULg

in Annual Workshop on Circuits, Systems and Signal Processing (ProRISC) (2009, November)

The real-time interpretation of video scenes and human motion is a research field with a lot of applications. Awidely used pre-processing step is the background subtraction, which highlights silhouettes ... [more ▼]

The real-time interpretation of video scenes and human motion is a research field with a lot of applications. Awidely used pre-processing step is the background subtraction, which highlights silhouettes. In addition, example-based and learning-based approaches are attractive for the interpretation of complex scenes. But to be effective, such techniques need to be trained on samples of realistic human silhouettes. This paper presents a method to automatically build databases of artificial, realistic, and annotated human silhouettes. Our method, based on a 3D human avatar, allows to save additional data with the silhouettes, and to highlight the different body parts. These supplementary data may be application-driven. To help in evaluating the relevance of automatically generated databases, we suggest some practical solutions based on a visual signature of the databases. [less ▲]

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See detailReal-time processing of depth and color video streams to improve the reliability of depth maps
Pierard, Sébastien ULg; Leens, Jérôme ULg; Van Droogenbroeck, Marc ULg

Poster (2009, November)

Depth is a useful information in vision to understand the geometrical properties of an environment. Depth is traditionally computed in terms of a disparity map acquired by a stereoscopic system but, over ... [more ▼]

Depth is a useful information in vision to understand the geometrical properties of an environment. Depth is traditionally computed in terms of a disparity map acquired by a stereoscopic system but, over the last few years, several manufacturers have released single-lens cameras that directly capture depth information (also called range). This is an important technological breakthrough although range signals remain difficult to handle in practice, due to many reasons (low resolution, noise, low framerate, . . . ). Practitioners still struggle to use range data in their applications. The purpose of this paper is to give a brief introduction to range data (captured with a camera), discuss common limitations, and propose techniques to cope with difficulties typically encountered with range cameras. These techniques are based on a simultaneous view of the scene by a color and a depth camera that are combined to improve their interpretation in real time. [less ▲]

Detailed reference viewed: 106 (17 ULg)
See detailClinical diagnosis of rhinosinusal diseases
Clercx, Cécile ULg

in Proceedings of the Fecava Congress, Lille, France, Nov 27th-30th, 2009 (2009, November)

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See detailPrésentation d’un outil logiciel pour soutenir la détection des tentatives de fraudes lors de l’évaluation des apprentissages
Béland, Sébastien; Raîche, Gilles; Magis, David ULg et al

Conference (2009, November)

Detailed reference viewed: 63 (0 ULg)
Peer Reviewed
See detailAssessment of the long term changes of the SES ecosystem
Grégoire, Marilaure ULg

Conference (2009, November)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailCrosstalk Modeling of Wnt, BMP and ERK Pathways during osteochondrogenic differentiation
Geris, Liesbet ULg; Vandeput, Maarten; Roberts, Scott et al

in proceedings of the International Symposium on Biomechanics and Biology of Bone Regeneration “From Functional Assessment To Guided Tissue Formation (2009, November)

The in vitro engineering of tissues may be achieved by mimicking in vivo tissue development. Although multiple skeletal tissue engineering applications already exist, the underlying mechanisms at protein ... [more ▼]

The in vitro engineering of tissues may be achieved by mimicking in vivo tissue development. Although multiple skeletal tissue engineering applications already exist, the underlying mechanisms at protein level are often poorly understood. Growth factors and protein pathways precisely navigate mesenchymal stem cells trough the correct cascades. A detailed understanding of these cascades will enable us to develop efficient and robust production methods, which are required for large scale tissue engineering applications. Multiple studies hypothesize that the Wnt/β-catenin pathway acts as a switching mechanism to determine the differential fate of esenchymal cells in osteoblasts or chondrocytes during skeletogenesis. The concentration of β-catenin is a key factor in this mechanism. Wnt upregulates the productionof β-catenin which in turn upregulates Runx2 and downregulates Sox9. High concentrations of Runx2 relative to Sox9 lead to osteoblasts, while the opposite situation leads to chondrocytes. Crosstalks of the Wnt pathway with other pathways such as that of BMP and ERK expand the amount of factors that can influence β-catenin, turning the linear signaling cascade into a complex network with multiple starting conditions. A mathematical model was derived from literature describing the pathways of BMP, Wnt and ERK as well as various crosstalks between these pathways that were suggested in literature. CellDesigner™ was used to formulate, solve and visualize the Ordinary Differential Equations describing the temporal evolution of the various model constituents. Multiple starting conditions (various concentrations of BMP, Wnt and ERK) were examined to clarify the crosstalk effect. Modeling various crosstalks proposed in literature resulted in a mutual inhibitory effect between Wnt and BMP signaling, an effect independently described in literature. Experiments are ongoing to corroborate the model predictions. [less ▲]

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See detailBoussaâda : Une ville touristique confrontée au développement urbain. Apports de la télédétection
Salmon, Marc ULg; Ammiche, Allaoua; Guermit, Ali et al

in Journées d’Animation Scientifique (JAS09) de l’AUF (2009, November)

La région de Boussaâda et son oasis en particulier profitent d'une situation géographique privilégiée ayant tôt permis une sédentarisation malgré le caractère aride du milieu. Ainsi, outre des sites ... [more ▼]

La région de Boussaâda et son oasis en particulier profitent d'une situation géographique privilégiée ayant tôt permis une sédentarisation malgré le caractère aride du milieu. Ainsi, outre des sites géologiques de caractère, on peut recenser de nombreux monuments et sites d'intérêt culturel et historique valorisables du point de vue touristique. Toutefois, la pression conjuguée d'une croissance rapide et importante de la population, d'une mutation du système organisationnel (administratif, juridictionnel et politique) et d'un contexte social particulier ont engendré un ensemble de dégradations qu'il convient de limiter. En conséquence, une première étape dans la prévention a consisté en l'évaluation des menaces anthropiques et naturelles par l'étude conjointe des documents bibliographiques, des observations de terrain et des données cartographiques et particulièrement de télédétection. [less ▲]

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See detailEtude numérique et sur modèle physique de l'aménagement de Taoussa (Mali)
Erpicum, Sébastien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in SHF, (Ed.) Modèle physiques hydrauliques - Outils indispensables du XXIe siècle (2009, November)

Physical modeling and numerical modeling are two efficient analysis approaches in hydraulic engineering. The interactive application of both methods is obviously the more effective response to most of the ... [more ▼]

Physical modeling and numerical modeling are two efficient analysis approaches in hydraulic engineering. The interactive application of both methods is obviously the more effective response to most of the flow problems analysis. Indeed, it enables combining the inherent advantages of both approaches, which are complementary, while being beneficial to the delays as well as the quality of the analyses. This paper presents the results of a successful application of such a combined numerical – physical study carried out by the Hydraulics engineering Laboratory of the University of Liège on behalf of Coyne et Bellier. It concerned, at the stage of detailed draft, the hydraulic study of the Taoussa Project on the Niger River in Mali. The studies, performed in less than 6 months, focused on the flow characteristics at the scale of the reservoir and the river, using the numerical approach, as well as on hydrodynamic details in the spillway using a large scale factor physical model. [less ▲]

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Peer Reviewed
See detailNIRS for the Determination of Internal Quality of Entire Apples
Sinnaeve, Georges; Pissard, A.; Fernàndez-Pierna, J. A. et al

in NIR-2009 Breaking the Dawn (2009, November)

Detailed reference viewed: 42 (5 ULg)
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See detailA simple and low cost angle measurement system for mobile robot positioning
Pierlot, Vincent ULg; Van Droogenbroeck, Marc ULg

in Workshop on Circuits, Systems and Signal Processing (ProRISC) (2009, November)

Positioning is a fundamental issue in mobile robot applications that can be achieved in multiple ways. Among these methods, triangulation with active beacons is widely used, robust, accurate, and flexible ... [more ▼]

Positioning is a fundamental issue in mobile robot applications that can be achieved in multiple ways. Among these methods, triangulation with active beacons is widely used, robust, accurate, and flexible. Our paper presents a new active beacon-based angle measurement system for indoor navigation using infrared signals. We propose a complete system for global positioning on a 2D plane based on the following parts: (1) a mirror, a lens, and a light guide, (2) a mini stepper motor and its controller, (3) an infrared receiver (TSOP7000), (4) a PIC microcontroller, and (5) three infrared beacons. The acquisition rate is 10 [Hz] and the accuracy is about 0.1 [degree]. The entire sensor is contained in a (8 X 8 X 8) [cm3] volume. The key innovation is the use of a cheap and simple infrared receiver as the main sensor for the angle measurement principle. The beacons too are simple cheap infrared LEDs. Furthermore, the system requires only one infrared communication channel, and no synchronization between the beacons and the robot is required. [less ▲]

Detailed reference viewed: 210 (21 ULg)
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See detailMicrofluidic on a wire
Terwagne, Denis ULg; Vandewalle, Nicolas ULg; Gilet, Tristan ULg

Poster (2009, November)

Detailed reference viewed: 27 (7 ULg)
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See detailStratégies pour une meilleure maîtrise de la qualité sanitaire
Daube, Georges ULg

Conference (2009, November)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailLe théâtre politique comme paradigme
Delhalle, Nancy ULg

Conference (2009, November)

Detailed reference viewed: 51 (10 ULg)
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See detailNear infrared reflectance spectroscopy for estimating soil characteristics useful in the diagnosis of soil fertility
Genot, Valérie ULg; Colinet, Gilles ULg; Bock, Laurent ULg et al

in Proceedings of the 14th International Conference on NIR Spectroscopy (2009, November)

Detailed reference viewed: 40 (2 ULg)
See detailModel sensitivities and carbon cycle - climate feedbacks: a study with an Earth System Model
Mouchet, Anne ULg; Loutre, M. F.; Goelzer, H. et al

Poster (2009, November)

Detailed reference viewed: 12 (0 ULg)
See detailIdentification and characterization of novel peptidoglycan glycosyltransferase inhibitors with antibacterial activity
Derouaux, Adeline ULg; Turk, Samo; Offant, Julien et al

Poster (2009, November)

Detailed reference viewed: 29 (3 ULg)
See detailLes anémies félines
Peeters, Dominique ULg

in Proceedings of the 15th FECAVA Congress (2009, November)

Detailed reference viewed: 27 (1 ULg)
See detailStudy of the performances of different nozzles types for spraying liquid fertilizer on wheat
Mostade, Oliver; Vancutsem, Françoise ULg; Huyghebaert, Bruno et al

in Huyghebaert, Bruno; Lorencowicz, Edmund; Uziak, Jacek (Eds.) Farm machinery and process management in sustainable agriculture (2009, November)

Detailed reference viewed: 34 (3 ULg)
See detailSpatiotemporal variations of DMSO in arctic sea ice: new insights using dmso reductase enzyme
Carnat, Gauthier; Brabant, Frederic; Papakyriakou, Tim et al

Poster (2009, November)

Detailed reference viewed: 35 (4 ULg)
Peer Reviewed
See detailThe lymphotoxin-β receptor induces different patterns of gene expression via two NF-κB pathways
Dejardin, Emmanuel ULg; Droin, Nathalie; Delhase, Mireille et al

Conference (2009, October 30)

Detailed reference viewed: 16 (7 ULg)
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See detailAMADEOX method : combination of various techniques to distinguish stoichiometric and anticatalytic activities of antioxidant molecules or natural extracts
Franck, Thierry ULg; Mouithys-Mickalad, Ange ULg; Kohnen, Stephan et al

in International Society of Antioxidants in Nutrition & Health, 5th International Conference on Polyphenols Applications, Bridging Bioefficacy to Innovations & Applications, October 29th-30th 2009, Malta (2009, October 29)

We developed an original method called AMADEOX (for « Action Modulatrice de l'Activité Des Enzymes Oxydantes ») able to distinguish stoichiometric, metabolic and anticatalytic activities of antioxidant ... [more ▼]

We developed an original method called AMADEOX (for « Action Modulatrice de l'Activité Des Enzymes Oxydantes ») able to distinguish stoichiometric, metabolic and anticatalytic activities of antioxidant molecules or natural extracts on stimulated neutrophils and purified myeloperoxidase (MPO), a key enzyme released by neutrophil and acting as one of the major ROS generating systems. [less ▲]

Detailed reference viewed: 87 (13 ULg)
See detailSmart drug delivery systems based on ph-sensitive block copolymers
Jérôme, Christine ULg

Conference (2009, October 28)

Detailed reference viewed: 17 (5 ULg)
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See detailIntérêts et limites des enquêtes alimentaires en population
Counet, Laurence; Haterte, Stéphanie; Guillaume, Michèle ULg

Conference (2009, October 28)

Detailed reference viewed: 8 (3 ULg)
See detailArgumentative interaction in a Flemish participatory technology assessment
Van Oudheusden, Michiel ULg

Conference (2009, October 27)

Detailed reference viewed: 10 (0 ULg)
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See detailCritères de reprise sportive après chirurgie tendineuse
Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg

Conference (2009, October 26)

Detailed reference viewed: 224 (13 ULg)
Peer Reviewed
See detailPEM fuel cell cathodes based on Pt/carbon xerogel catalysts
Job, Nathalie ULg; Chatenet, M.; Brigaudet, M. et al

Poster (2009, October 25)

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailEDLC performance of cellulose acetate based carbon aerogel electrodes subject to morphology and surface chemistry modification
Hildenbrand, Claudia; Grzyb, B.; Berthon-Fabry, S. et al

Poster (2009, October 25)

Detailed reference viewed: 41 (2 ULg)
Peer Reviewed
See detailNi-doped carbon xerogels for H2 storage
Zubizarreta, Leire; Menénez, J. A.; Pis, J. J. et al

Poster (2009, October 25)

Detailed reference viewed: 210 (0 ULg)
Peer Reviewed
See detailAnnual congress of the international league for competition law.
Petit, Nicolas ULg

Conference (2009, October 25)

Detailed reference viewed: 7 (1 ULg)
See detailAgir et penser sexués à l'adolescence : entre rapports sociaux de sexe et de classe
Gavray, Claire ULg

Conference (2009, October 24)

Detailed reference viewed: 9 (1 ULg)
See detailPros and Cons University-based Business Schools
Froehlicher, Thomas ULg

Conference (2009, October 24)

Detailed reference viewed: 57 (4 ULg)
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See detailRôle et suivi infirmier lors de l'implantation percutanée de valve aortique
ERPICUM, Marie ULg

Conference (2009, October 23)

Detailed reference viewed: 75 (10 ULg)
Peer Reviewed
See detailEntre attention et jugement : Brentano et la perception
Boccaccini, Federico ULg

Conference (2009, October 23)

Detailed reference viewed: 19 (0 ULg)
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See detailMarital satisfaction in couples with an alcoholic member
Dethier, Marie ULg; Counerotte, Christelle; Blairy, Sylvie ULg

Poster (2009, October 23)

Detailed reference viewed: 47 (13 ULg)
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See detailMéthode de pré-dimensionnement des PKW et application au barrage de la Raviège
Machiels, Olivier ULg

Conference (2009, October 23)

Detailed reference viewed: 46 (1 ULg)
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See detailApproche numérique simplifiée et comparaison aux résultats expérimentaux
Machiels, Olivier ULg

Conference (2009, October 23)

Detailed reference viewed: 16 (1 ULg)
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See detailPresentation of the results from the Egolf TC2 09 -1 fire resistance round robin
Dumont, Fabien ULg

Conference (2009, October 22)

This presentation reports the statistical analysis conducted on the raw data issued from the TC2 09-1 round-robin performed by 31 Egolf fire testing laboratories. The test specimen is a gypsum plaster ... [more ▼]

This presentation reports the statistical analysis conducted on the raw data issued from the TC2 09-1 round-robin performed by 31 Egolf fire testing laboratories. The test specimen is a gypsum plaster board partition tested according to EN 1364-1. [less ▲]

Detailed reference viewed: 48 (14 ULg)
See detailA Systems Biology Approach to Apoptosis Signalling
Bullinger, Eric ULg

Conference (2009, October 22)

Detailed reference viewed: 5 (0 ULg)
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See detailLe texte et ses pratiques d'instanciation
Dondero, Maria Giulia ULg

in Nouveaux Actes Sémiotiques (2009, October 22)

This essay presents some contemporary semiotic issues as the generation of the expression level of texts, the process of textualisation and the constitution of a semiotics of experience. I approach the ... [more ▼]

This essay presents some contemporary semiotic issues as the generation of the expression level of texts, the process of textualisation and the constitution of a semiotics of experience. I approach the notions of enonciation praxis and figurative syntax to further develop a reflection on the generation of the expression level of pictorial and photographic texts. [less ▲]

Detailed reference viewed: 62 (8 ULg)
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See detailHow are consummers' interests taken into account when applying competition law ?
Sibony, Anne-Lise ULg

Conference (2009, October 21)

Detailed reference viewed: 50 (5 ULg)
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See detailVapocraquage et Steam Explosion
Jacquet, Nicolas ULg; Paquot, Michel ULg

Conference (2009, October 21)

Detailed reference viewed: 25 (11 ULg)
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See detailMonitoring des bandes riveraines : vitrine des cours d'eau wallons
Debruxelles, Natacha; Burton, Christophe ULg; Claessens, Hugues ULg et al

Poster (2009, October 20)

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See detailExperiences on avoided degradation in Africa : Technical challenges in monitoring of carbon impacts of logging and the estimation of potential impact of SFM and RIL practices - state of the art of current research, results and future axes of research needed
Durrieu de Maderon, Luc; Bauwens, Sébastien ULg

Conference (2009, October 20)

Présentation des pratiques forestières en Afrique Centrale de leurs impacts en terme de carbone et proposition d'un protocole d’études

Detailed reference viewed: 13 (2 ULg)
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See detailApplication of the HFEMC method to an abandoned coalfield in Belgium: From conceptualisation to scenario simulations
Wildemeersch, Samuel ULg; Brouyère, Serge ULg; Orban, Philippe ULg et al

Conference (2009, October 20)

The Hybrid Finite Element Mixing Cell (HFEMC) method is a flexible modelling technique particularly suited to mining context (Brouyère et al., 2009). The principle of this method is to subdivide the ... [more ▼]

The Hybrid Finite Element Mixing Cell (HFEMC) method is a flexible modelling technique particularly suited to mining context (Brouyère et al., 2009). The principle of this method is to subdivide the modelled zone into several subdomains and to select a specific equation, ranging from the simple linear reservoir equation to the groundwater flow in porous media equation, to model groundwater flow in each subdomain. The model can be run in transient conditions, which makes it a useful tool for managing mine closure post-issues such as groundwater rebound and water inrushes. An application of the HFEMC method to an abandoned underground coal mine near the city of Liège (Belgium) is presented. The case study zone has been discretized taking advantage of the flexibility of the method. Then, the model has been calibrated in both steady-state and transient flow regimes based on hydraulic head and water discharge rate observations. Finally, the calibrated model has been used to run several scenarios in order to assess the impacts of possible future phenomena on the hydraulic heads and the water discharge rates. Among others, the simulation of a strong rainfall event shows a quick and strong increase in hydraulic heads in some exploited zones coupled with a strong increase in associated water discharge rates. This could lead to stability problems in the hill slopes near the exploited zones. This kind of predictions can greatly help managing and predicting mine water problems in this particularly complex mining system. [less ▲]

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See detailLa sectorisation des cours d’eau wallons
Mouchet, Frédéric; Burton, Christophe ULg; Claessens, Hugues ULg et al

Poster (2009, October 20)

Detailed reference viewed: 61 (17 ULg)
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See detailPhonological impairment as a decay-based impairment : New evidence from a single case study
Martinez Perez, Trecy ULg; Poncelet, Martine ULg; Boniver, Celine ULg et al

Poster (2009, October 19)

Computational models of language processing such as the Martin and Saffran (1992) model assume two properties underlying language processing: decay rate of activated representations and strength of ... [more ▼]

Computational models of language processing such as the Martin and Saffran (1992) model assume two properties underlying language processing: decay rate of activated representations and strength of activation spread between phonological, lexical and semantic levels of representation. Despite the theoretical and epistemological advantages of these models, as opposed to box-and-arrow type models, empirical evidence for these models is currently based on a very limited number of case studies (e.g., patient NC, Martin & Saffran, 1992; patient CO, Majerus et al., 2001). We present here a new single case study providing further support for the existence of decay rate impairments as an underlying cause of language impairment. [less ▲]

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See detailPulse pressure and pulse wave velocity as markers of arterial stiffness in patients with type 1 diabetes
Philips, Jean-Christophe ULg; Xhignesse, Patricia ULg; Marchand, Monique ULg et al

Conference (2009, October 19)

Type 1 diabetes was associated with an increase in both PP and PWV as compared to a nondiabetic population. In the diabetic population, a close correlation between the two indirect markers of arterial ... [more ▼]

Type 1 diabetes was associated with an increase in both PP and PWV as compared to a nondiabetic population. In the diabetic population, a close correlation between the two indirect markers of arterial stiffness was found and also between each of them and age (or diabetes duration), but not in controls. These observations support the concept of an earier arterial stiffness in type 1 diabetes with rather poor glycemic control. [less ▲]

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See detailExposer la ville et son histoire. Le musée de ville comme concept muséologique
Postula, Jean-Louis ULg

Conference (2009, October 17)

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See detailHow to Capture Life as it Happens ? An Aesthetical Approach to Joann Sfar’s Drawing
Hagelstein, Maud ULg

Conference (2009, October 17)

Which theoretical categories can we use to talk about an artist’s drawing? The quality of the line, the specific rhythm, the relationship between line and color, the degree of realism or the aesthetic ... [more ▼]

Which theoretical categories can we use to talk about an artist’s drawing? The quality of the line, the specific rhythm, the relationship between line and color, the degree of realism or the aesthetic influence of past masters: these are not easy to describe in an original way. The difficulties encountered in the traditional field of the fine arts also present themselves when considering comics because the drawing is specific and implicates a different temporality. The artists themselves regret the lack of a real aesthetic approach to their works, but we cannot simply transpose the usual discourse to the study of comics: as a young medium, this art form deserves relevant categories of analysis. My research will investigate what Aesthetics, as formal approach, could add to comics studies. I propose to read Joan Sfar’s auto-biographical notebooks published by L’association between 2002 and 2005 – in particular: Harmonica, Ukulélé, Parapluie, Piano, Caravan. These notebooks contain precious insight into his work method and his drawing. I would like to highlight several recurring themes. Sfar first criticizes the “academic drawing” he learned at school as being too “realist,” “anatomical,” and devoid of life. He explains that it took him a long time to depart from this kind of drawing. By contrast, he heartily advocates drawing directly from the perception of movement, situation, and expression, implying rapid and freehand drawing. In this context, Sfar refers to the famous illustrator Quentin Blake, who describes his career path, accompanied by relevant drawings, in La vie de la page (1995). I propose to compare Joan Sfar’s ideas on drawing with this principal influence on his work. Finally, the theory of color and light shows – in another way – the importance of the accidental and the uncalculated in his art. My arguments will be supported by various examples of Sfar’s work. [less ▲]

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See detailOral Photography
LAMBERT, France ULg

Conference (2009, October 17)

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See detailCohérences
Pagnoulle, Christine ULg

Conference (2009, October 17)

Starting from seven illustrations my contribution shows the diversity of approaches that are required to capture or restore the consistency of a text.

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See detailSPATIO-TEMPORAL LOCALIZATION OF INTERMEDIATE FILAMENTS IN THE ORGAN OF CORTI BETWEEN THE EMBRYONIC DAY 18 (E18) AND THE POST-NATAL DAY 15 (P15) IN RAT
Johnen, Nicolas ULg; Thelen, Nicolas ULg; Malgrange, Brigitte ULg et al

Poster (2009, October 17)

The mammalian auditory organ, the organ of Corti (OC), is composed of mechanosensory hair cells and nonsensory supporting cell types. Based on their morphology and physiology, a least four types of ... [more ▼]

The mammalian auditory organ, the organ of Corti (OC), is composed of mechanosensory hair cells and nonsensory supporting cell types. Based on their morphology and physiology, a least four types of supporting cells can be identified in the OC: inner pillar cell, outer pillar cell, phalangeal cell and Deiter’s cells. The structure of this organ is well reported in adult but its development is still little known. Using antibodies directed against different proteins of intermediate filaments cytoskeleton, we studied the spatial-temporal localization of cytokeratins (typical of epithelial cells) and vimentin (typical of mesenchymal cells) during the differentiation of the OC in rat from the embryonic day 18 (E18) to the postnatal day (P15). Whatever the antibody used, we observed an obvious labelling over the supporting cells after the birth. In particular, an intense labelling is observed in the pillar cells and in the Deiters’ cells at P8 and at P10. These results suggest that the epithelial-mesenchymal transition might be implicated in the opening of Corti’s tunnel between the pillar cells and the formation of the Nuel’s spaces between the Deiters’ cell and their outer hair cells, at P8 and at P10 respectively. [less ▲]

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See detailLe droit de rétractation/Het herroepingsrecht
Biquet, Christine ULg; Loly, Jessica ULg; Steennot, Reinhard

Conference (2009, October 16)

Detailed reference viewed: 92 (18 ULg)
See detailThe Rake’s Progress – Igor Stravinsky
Corswarem, Emilie ULg

Conference (2009, October 16)

Detailed reference viewed: 23 (0 ULg)
Peer Reviewed
See detailCause of mortality and diseases in hare (Lepus europaeus) in Southern Belgium
Grégoire, F; Hanrez, D; Mousset, B et al

Conference (2009, October 16)

Detailed reference viewed: 4 (1 ULg)
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See detailEstimation of the error distribution in right censored and selection biased regression models
Laurent, Géraldine ULg; Heuchenne, Cédric ULg

Conference (2009, October 15)

Consider the location-scale regression model Y=m(X) + σ(X) Ɛ where the error Ɛ is independent of the covariate X and where m and σ are unknown smooth functions. The pair (X; Y ) is subject to generalized ... [more ▼]

Consider the location-scale regression model Y=m(X) + σ(X) Ɛ where the error Ɛ is independent of the covariate X and where m and σ are unknown smooth functions. The pair (X; Y ) is subject to generalized bias selection and the response to right censoring. We construct an estimator for the cumulative distribution function of the error Ɛ, and develop a bootstrap procedure to select the smoothing parameter involved in the procedure. This method is studied via extension simulations and applied to real unemployment data. [less ▲]

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See detailOptimisation de l'acylation enzymatique du mannose par l'utilisation de co-solvants
Brognaux, Alison ULg; Favrelle, Audrey ULg; Deleu, Magali ULg et al

Poster (2009, October 15)

Les esters de sucres sont des surfactants non-ioniques avec de nombreuses applications dans l’industrie alimentaire et pharmaceutique. La synthèse enzymatique est généralement préférée à la synthèse ... [more ▼]

Les esters de sucres sont des surfactants non-ioniques avec de nombreuses applications dans l’industrie alimentaire et pharmaceutique. La synthèse enzymatique est généralement préférée à la synthèse chimique. En effet, cette dernière consomme beaucoup d’énergie, est moins sélective envers les différents groupes hydroxyle du sucre et conduit à des produits de caramélisation. Le type de solvant, le ratio sucre / lipide, la température et le type de lipase immobilisée peuvent être modifiés afin d’optimiser la vitesse initiale et le rendement de réaction. Les travaux décrits rapportent l’optimisation de la synthèse enzymatique de myristate de mannosyle à partir de mannose et d’acide myristique en présence de la lipase de Candida antarctica B (Novozyme 435). Les concentrations optimales en mannose et en acide myristique sont respectivement de 0,1 et 0,6 M dans du tert-butanol pur à 60°C. Ces conditions conduisent à une vitesse initiale de 1,3 g/l.h pour 2 g/l d’enzyme et à un rendement molaire de 55%. Afin d’améliorer cette vitesse initiale de réaction, différents mélanges de tert-butanol et de co-solvants polaires ont été testés. Les solvants polaires (log P faibles) augmentent la solubilité des sucres mais provoquent l’inactivation partielle des lipases. Lorsque le log P est supérieur à 3, l’enzyme reste active mais ce type de milieu n’est pas approprié si les deux substrats diffèrent grandement en terme de polarité. Le but de cette étude est donc de trouver un compromis entre la solubilité du sucre et le maintient de l’activité enzymatique. Les quatre co-solvants testés sont le DMSO, le DMF, le formamide et la pyridine. Au terme de ce travail, le DMSO, à raison de 10 % dans le milieu réactionnel, s’est avéré être le meilleur co-solvant parmi ceux testés. Dans ces conditions, la vitesse initiale de réaction est accrue de 130 %. [less ▲]

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See detailPEGASE: UN MODÈLE INTÉGRÉ BASSIN HYDROGRAPHIQUE/ RIVIÈRES: PREMIÈRE APPLICATION TEST À LA COCAÏNE.
Deliège, Jean-François ULg; Everbecq, Etienne ULg; Magermans, Pol ULg et al

Conference (2009, October 15)

Le modèle PEGASE (Planification Et Gestion de l’ASsainissement des Eaux), développé à l’Aquapôle de l’Université de Liège a été utilisé pour réaliser une première simulation test de la cocaïne dans le ... [more ▼]

Le modèle PEGASE (Planification Et Gestion de l’ASsainissement des Eaux), développé à l’Aquapôle de l’Université de Liège a été utilisé pour réaliser une première simulation test de la cocaïne dans le réseau hydrographique belge. La principale conclusion de cette simulation test est qu’il est possible de simuler le devenir des dérivés de la cocaïne dans les eaux de surface ; cela démontre également la cohérence des mesures réalisées dans le cadre de l’étude COWAT. Des améliorations mineures au modèle PEGASE et aux données d’entrée seraient cependant souhaitables pour améliorer cette modélisation (possibilité de faire varier l’équivalent-habitant par zones). [less ▲]

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See detailSynthèse enzymatique de surfactants sucrés dans le CO2 supercritique
Favrelle, Audrey ULg; Brognaux, Alison ULg; Debuigne, Antoine ULg et al

Poster (2009, October 15)

Les esters de carbohydrates sont des surfactants non ioniques ayant un vaste éventail d’applications commerciales en particulier dans l’industrie cosmétique, alimentaire et pharmaceutique. Ils sont ... [more ▼]

Les esters de carbohydrates sont des surfactants non ioniques ayant un vaste éventail d’applications commerciales en particulier dans l’industrie cosmétique, alimentaire et pharmaceutique. Ils sont produits à partir de matières premières renouvelables et peu coûteuses, et sont biodégradables et non toxiques. De manière générale, la synthèse d’esters de sucre nécessite de nombreuses étapes de protection/déprotection des groupements hydroxyles, le nombre et la position exacte des substituants greffés sur un squelette osidique étant des paramètres difficiles à contrôler lors des réactions chimiques. En revanche, la spécificité de certaines enzymes, et en particulier des lipases, peut être mise à profit pour modifier les sucres en milieux organiques. L’utilisation des lipases permet ainsi un meilleure sélectivité et énantiosélectivité des réactions d’estérification et de transestérification. D’autre part, la voie enzymatique permet d’effectuer ces réactions dans des conditions expérimentales beaucoup plus douces de température, de pH et de pression, par rapport aux synthèses réalisées à l’aide de catalyseurs chimiques. Le dioxyde de carbone supercritique (Sc-CO2), quant à lui, constitue une alternative intéressante aux solvants organiques couramment utilisés dans ce domaine car il est non toxique, chimiquement inerte, non inflammable…. Par exemple, son utilisation réduit la contamination des produits finaux avec des solvants résiduels. Ces avantages lui confèrent un large potentiel d’applications notamment dans l’industrie alimentaire, cosmétique, pharmaceutique mais également des matériaux. Notre travail consiste donc à développer la synthèse enzymatique de surfactants sucrés en milieu Sc-CO2 et d’étudier l’influence de divers paramètres sur la réaction biocatalysée. L’activité enzymatique et les rendements observés lors de nos expériences préliminaires dans le Sc-CO2 seront présentés ici et comparés avec ceux obtenus dans des solvants organiques traditionnels. [less ▲]

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Peer Reviewed
See detailImpact of antibiotics in wastewater on activated sludge treatment. The Erythromycin case
Louvet, Jean-Noël ULg; Potier, Olivier; Dumas, Dominique et al

Conference (2009, October 15)

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See detailRevisiting the multivariate coefficient of variation for comparing electrophoretic techniques in External Quality Assessment (EQA) schemes
Zhang, Lixin ULg; Albert, Adelin ULg

Conference (2009, October 15)

External Quality Assessment (EQA) schemes are national programmes designed to control the analytical performance of clinical laboratories and to maintain inter-laboratory variability within acceptable ... [more ▼]

External Quality Assessment (EQA) schemes are national programmes designed to control the analytical performance of clinical laboratories and to maintain inter-laboratory variability within acceptable limits. In this context, the type of assay technique or equipment used by the participants is an important factor to take into account. The coefficient of variation (CV) is widely used in EQA to compare the reproducibility of techniques and equipments: the lower the CV, the better the analytical performance. The recent introduction of protein electrophoresis, a laboratory test profile consisting of five fractions (albumin, α1, α2, β and γ globulins) summing up to 100%, in the EQA programme (Zhang et. al. 2008) prompted us to revisit an old problem (Reyment 1960), namely the multivariate extension of the univariate CV concept, and to suggest some amendments to existing solutions. Further, the application of the multivariate CV to techniques and methods used in the assay of protein electrophoresis raises concomitant statistical problems. First, the compositional nature of electrophoretic data requires a log-ratio one-to-one transformation from the simplex to the real space (Aitchison 1982). Next, robust estimations of the mean and the covariance matrix (Rousseeuw and Van Driessen 1999) are needed to avoid the effect of outliers. The resulting robust multivariate CVs are illustrated on electrophoretic EQA material from the Belgian and French national EQA programmes to assess the analytical variability of the electrophoretic techniques used. [less ▲]

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See detailImmunisation passive du poulet de chair vis-à-vis des salmonelles à l'aide d'anticorps du jaune d'oeuf
Marcq, Christopher ULg; Thewis, André ULg; Portetelle, Daniel ULg et al

in Impacts de l'alimentation sur la santé animale : nouveaux développements (2009, October 14)

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See detailInterprétation des sérologies infectieuses à orientation rhumatologique.
HUYNEN, Pascale ULg

Conference (2009, October 14)

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See detailPréparation de nouveaux copolymères amphiphiles mannosylés d'architecture greffée et caractérisation par QCM-D
Freichels, Hélène ULg; Broze, Guy; Alaimo, David ULg et al

Conference (2009, October 14)

Durant les dernières décennies, le domaine pharmaceutique s’est intéressé aux micelles et nanoparticules polymères celles-ci pouvant être utilisées comme vecteurs à libération contrôlée. Dans ce domaine ... [more ▼]

Durant les dernières décennies, le domaine pharmaceutique s’est intéressé aux micelles et nanoparticules polymères celles-ci pouvant être utilisées comme vecteurs à libération contrôlée. Dans ce domaine, des copolymères amphiphiles combinant le poly(oxyde d’éthylène) (POE), polymère possédant des propriétés répulsives vis-à-vis des protéines plasmiques, et la poly-epsilon-caprolactone (PCL), un polyester aliphatique, polymère hydrophobe biocompatible et biodégradable permettant l’incorporation d’un principe actif hydrophobe, sont d’excellents candidats pour cette d’application. Jusqu’à présent, ce type de copolymère amphiphile principalement étudié est d’architecture linéaire. Récemment, notre laboratoire a développé une stratégie permettant la préparation de nouveaux copolymères greffés, composés d’un squelette principal de PCL et de greffons de POE. De plus, des agents de ciblage peuvent être introduits à l’extrémité du POE de ces copolymères amphiphiles, faisant de ceux-ci des candidats idéaux comme vecteur de troisième génération, permettant un ciblage spécifique au sein même de l’organisme. Le mannose est un agent intéressant, car il est reconnu à la surface des cellules dendritiques. Dans ce travail, la préparation de copolymères greffés fonctionnalisés par du mannose est décrite. La présence de mannose à la surface des micelles a d’abord été mise en évidence par test ELLA (Enzyme Linked Lectin Assay). Ensuite une étude plus approfondie a été réalisée par QCM-D (Microbalance à Cristal de Quartz avec Dissipation). Cette technique originale permet de mettre en évidence l’interaction entre la lectine immobilisée sur la surface du cristal de la microbalance et le mannose exposés à la périphérie des micelles du copolymère. [less ▲]

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See detailEffet modulateur sur la population bactérienne intestinale des hydrates de carbone constitutifs de différentes variétés de céréales
Bindelle, Jérôme ULg

in 9ème Journée des Productions Porcines et Avicoles, Gembloux 14 October 2009 (2009, October 14)

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See detailDetection of influential observations on the error rate based on the generalized k-means clustering procedure
Ruwet, Christel ULg; Haesbroeck, Gentiane ULg

Conference (2009, October 14)

Cluster analysis may be performed when one wishes to group similar objects into a given number of clusters. Several algorithms are available in order to construct these clusters. In this talk, focus will ... [more ▼]

Cluster analysis may be performed when one wishes to group similar objects into a given number of clusters. Several algorithms are available in order to construct these clusters. In this talk, focus will be on the generalized k-means algorithm, while the data of interest are assumed to come from an underlying population consisting of a mixture of two groups. Among the outputs of this clustering technique, a classi cation rule is provided in order to classify the objects into one of the clusters. When classi cation is the main objective of the statistical analysis, performance is often measured by means of an error rate ER(F; Fm) where F is the distribution of the training sample used to set up the classi cation rule and Fm (model distribution) is the distribution under which the quality of the rule is assessed (via a test sample). Under contamination, one has to replace the distribution F of the training sample by a contaminated one, F(eps) say (where eps corresponds to the fraction of contamination). In that case, the error rate will be corrupted since it relies on a contaminated rule, while the test sample may still be considered as being distributed according to the model distribution. To measure the robustness of classification based on this clustering proce- dure, influence functions of the error rate may be computed. The idea has already been exploited by Croux et al. (2008) and Croux et al. (2008) in the context of linear and logistic discrimination. In this setup, the contaminated distribution takes the form F(eps)= (1-eps)*Fm + eps*Dx, where Dx is the Dirac distribution putting all its mass at x: After studying the influence function of the error rate of the generalized k- means procedure, which depends on the influence functions of the generalized k-means centers derived by Garcia-Escudero and Gordaliza (1999), a diagnostic tool based on its value will be presented. The aim is to detect observations in the training sample which can be influential for the error rate. [less ▲]

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See detailEffets biologiques et immunitaires du colostrum bovin sur le porcelet au sevrage
Boudry, Christelle ULg; Dehoux, Jean-Paul; Wavreille, José et al

in 9éme Journée des Productions porcines et avicoles "Impact de l'alimentation sur la santé animale : nouveaux développement" (2009, October 14)

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See detailInter-organizational learning within innovation projects : critical stages, issues and good practices
Rondeaux, Giseline ULg; Chalant, Ingrid ULg; Degré, Julie ULg et al

Conference (2009, October 13)

In September 2005, the Walloon Government decided to adopt “the Walloon Marshall Plan”, one of the priorities of which is the setting up of competitiveness clusters bringing together different ... [more ▼]

In September 2005, the Walloon Government decided to adopt “the Walloon Marshall Plan”, one of the priorities of which is the setting up of competitiveness clusters bringing together different contributors (businesses, private & public research centres and training centres). In this context, our aim is to understand how the businesses and the research and training centres are managing to put in place partnership dynamics in order to create innovative projects. To achieve this, we have chosen to focus primarily on the dynamics of inter-organizational learning. Consequently, within the five competitiveness clusters set up in mid-2006, we have opted to focus in particular on 4 projects which have emerged from them. The conceptual model upon which we have based our initiative is structured around this aim and makes use of various analytical benchmarks. Inspired in particular by the work of Holmqvist (2003), this model constitutes our reading and analysis framework for the projects selected from the four competitiveness clusters selected. [less ▲]

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