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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)

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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: 30 (14 ULg)
See detailA Systems Biology Approach to Apoptosis Signalling
Bullinger, Eric ULg

Conference (2009, October 22)

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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: 41 (5 ULg)
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See detailVapocraquage et Steam Explosion
Jacquet, Nicolas ULg; Paquot, Michel ULg

Conference (2009, October 21)

Detailed reference viewed: 20 (9 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 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

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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)

Detailed reference viewed: 22 (5 ULg)
See detailOral Photography
LAMBERT, France ULg

Conference (2009, October 17)

Detailed reference viewed: 12 (1 ULg)
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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 detailThe Rake’s Progress – Igor Stravinsky
Corswarem, Emilie ULg

Conference (2009, October 16)

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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: 78 (17 ULg)
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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 ▲]

Detailed reference viewed: 54 (6 ULg)
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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)

Detailed reference viewed: 10 (0 ULg)
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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 ▲]

Detailed reference viewed: 157 (68 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 detailInterprétation des sérologies infectieuses à orientation rhumatologique.
HUYNEN, Pascale ULg

Conference (2009, October 14)

Detailed reference viewed: 9 (0 ULg)
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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 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 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 ▲]

Detailed reference viewed: 70 (8 ULg)
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See detailLa transplantation pancréatique isolée : le retour à l'activité physqiue
Malaise, Jacques; Dabe, Alain; Hermant, Christophe et al

Conference (2009, October 10)

Detailed reference viewed: 79 (3 ULg)
See detailPrésentation des ateliers de philosophie de PhiloCité
Herla, Anne ULg

Conference (2009, October 10)

Detailed reference viewed: 6 (0 ULg)
See detailBehavioural impacts of gender stereotype level at adolescence ” .
Gavray, Claire ULg

Conference (2009, October 10)

Survey 2009 on adolescents' stereotypes (900 Belgian pupils). Links can be done between , on one hand, stereotyped faiths and attitudes and, on a other hand, the experience of violence, as victim and ... [more ▼]

Survey 2009 on adolescents' stereotypes (900 Belgian pupils). Links can be done between , on one hand, stereotyped faiths and attitudes and, on a other hand, the experience of violence, as victim and perpetrator. It's true for boys and girls but not with the same profile. Comparisons can be done with ISRD results ( Self-related Delinquency data) [less ▲]

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See detailNaissance et renaissance de vétérans: interactions entre l'Arbre et l'Homme au fil des siècles
Campanella, Bruno ULg; Kervyn, Vincent; Delcroix, Bernard et al

Conference (2009, October 10)

Detailed reference viewed: 58 (12 ULg)
See detailDosage de l'alcool dans le cadre de la sécurité routière : approche statistique
Pirson, Laurence ULg

Conference (2009, October 09)

Detailed reference viewed: 22 (7 ULg)
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See detailL'arbre dans le patrimoine culturel immatériel
Lempereur, Françoise ULg

Conference (2009, October 08)

La communication s'attache à définir les pratiques culturelles dans laquelle l’arbre s’inscrit : pratiques coutumières du temps et des groupes, pratiques économiques, politiques, alimentaires, techniques ... [more ▼]

La communication s'attache à définir les pratiques culturelles dans laquelle l’arbre s’inscrit : pratiques coutumières du temps et des groupes, pratiques économiques, politiques, alimentaires, techniques, ludiques, expressives, scientifiques et éthiques. Elle tente de définir le statut de l’arbre au sein des sociétés traditionnelles et examine quelles valeurs identitaires, esthétiques, juridiques, symboliques ou pragmatiques sont aujourd’hui liées aux arbres patrimoniaux et comment les collectivités et/ou les institutions peuvent (ou doivent) prendre en charge la protection de ces valeurs et surtout leur transmission. [less ▲]

Detailed reference viewed: 40 (6 ULg)
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See detailFirm-Level Evidence on Innovation in Spain
Artige, Lionel ULg

Conference (2009, October 08)

Detailed reference viewed: 29 (7 ULg)
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See detailPlantes médicinales et paludisme
Angenot, Luc ULg

Conference (2009, October 07)

Detailed reference viewed: 21 (3 ULg)
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See detailEvaluation des potentialités antiplasmodiales de plantes utilisées en médecine traditionnelle au Burkina Faso
Jansen, Olivia ULg; Nikiéma, Jean-Baptiste; Angenot, Luc ULg et al

Conference (2009, October 07)

Detailed reference viewed: 70 (9 ULg)
See detailLa politique étrangère de l’administration d’Álvaro Uribe Vélez : Le paradoxe entre vouloir et réussir une intégration sous-régionale latino-américaine
Parra Santamaria, Lusmiriam Andrea ULg

Conference (2009, October 03)

This communication is about the Alvaro Uribe Velez' (two periods) commercial foreign policy. By a constructivist description of this policy I showed its paradox. The objectif of working for regional ... [more ▼]

This communication is about the Alvaro Uribe Velez' (two periods) commercial foreign policy. By a constructivist description of this policy I showed its paradox. The objectif of working for regional integration (of Andean Community of Nations) was banned by this President´s unilateral political actions. [less ▲]

Detailed reference viewed: 34 (3 ULg)
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See detailThe Management of Social Enterprises
Mertens de Wilmars, Sybille ULg

Conference (2009, October 02)

This presentation describes the ways in which social enterprises are managed in order to successfully combine social mission and economic activities.

Detailed reference viewed: 72 (7 ULg)
See detail"Premier point: l'écriture"
Sofia, Estanislao ULg

Conference (2009, October 02)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailLe droit immobilier en Europe : perspectives d’avenir
Kohl, Benoît ULg

Conference (2009, October 02)

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See detailVitamin D, Status and perspectives
CAVALIER, Etienne ULg

Conference (2009, October 02)

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See detailLe management des entreprises de l'économie sociale
Mertens de Wilmars, Sybille ULg

Conference (2009, October 02)

Detailed reference viewed: 45 (8 ULg)
See detailVoraussage und ethische Bewertung von zukünftigen Rohstoff- und Energieszenarien
Kopriwa, Nicole; Fayyaz, Sara; Hillerbrand, Rafaela et al

Conference (2009, October 01)

See detailAu-delà de la schizophrénie postcoloniale : Becoming Abigail de Chris Abani
Tunca, Daria ULg

Conference (2009, October 01)

Detailed reference viewed: 21 (1 ULg)
See detailApports de la luminescence à la chronologie de la basilique Saint-Seurin de Bordeaux
Bouvier, Armel; Guibert, Pierre; Sapin, Christian ULg et al

Conference (2009, October)

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See detailEvaluation of the suitability of the land surface model JULES for climate impact studies in Belgian ecosystem
Van Den Hoof, Catherine; Aubinet, Marc ULg; Heinesch, Bernard ULg et al

Conference (2009, October)

Detailed reference viewed: 33 (1 ULg)
Peer Reviewed
See detailExpected Design Space: a Bayesian perspective based on modelling, prediction and multi-criteria decision method
Lebrun, Pierre ULg; Boulanger, Bruno ULg

Conference (2009, October)

The Design Space (DS) is defined as the set of factors settings (input conditions) that provides results at least better than pre-defined acceptance limits. The proposed methodology aims at identifying a ... [more ▼]

The Design Space (DS) is defined as the set of factors settings (input conditions) that provides results at least better than pre-defined acceptance limits. The proposed methodology aims at identifying a region in the space of factors that will likely provide satisfactory results during the future use of an analytical method or process in routine, through an optimization process. First, in a Bayesian framework, DS is derived from the joint predictive posterior distribution of the responses in a multivariate multiple regression problem using non-informative as well as informative prior distribution of the parameters. The case of DS in presence of highly correlated responses will be covered. Second, a multi-criteria decision is taken with respect to the pre-defined acceptance limits, aiming to identify the DS of any analytical methods or other processes. A strong link is made between acceptance limits and objective functions to optimize, using desirability functions and index. Examples based on high-performance liquid chromatography (HPLC) methods will be given, illustrating the applicability of the methodology with highly correlated and constrained responses. [less ▲]

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See detailOptimization of dynamic embedded, Water based surface heat (and cold) emitting system for buildings.
Thomas, Sébastien ULg; Franck, Pierre-Yves ULg; Andre, Philippe ULg

Conference (2009, October)

This paper presents the heat flow model and the experimental test bench developed to optimize a new kind of heating floor. In the first part of the text is described the new kind of high reactivity ... [more ▼]

This paper presents the heat flow model and the experimental test bench developed to optimize a new kind of heating floor. In the first part of the text is described the new kind of high reactivity emitting device for building heating and cooling. A second part illustrates the numerical model developed to evaluate the device efficiency. Finally experimental test bench implementation and results are presented. Both computational and experimental results support the use of colder water in comparison to other heating devices. This implies energy savings for building heating. [less ▲]

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See detailImplementation of new Fast-GC-MS and UHPLC-MS/MS data in a conventional GC-MS database for heroin profiling
Debrus, Benjamin ULg; Broséus, Julian; Guillarme, Davy et al

Conference (2009, October)

Detailed reference viewed: 56 (11 ULg)
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See detailSound Field Modeling in Architectural Acoustics using a Diffusion Equation Based Model
Fortin, Nicolas; Picaut, Judicaël; Billon, Alexis ULg et al

Conference (2009, October)

In this paper, an implementation of a model for room-acoustic predictions in COMSOL Multiphysics is presented. The model (called diffusion model) is based on the solving of diffusion equations instead of ... [more ▼]

In this paper, an implementation of a model for room-acoustic predictions in COMSOL Multiphysics is presented. The model (called diffusion model) is based on the solving of diffusion equations instead of classical wave equations and allows simulating the sound propagation in complex geometries at high frequency. Instead of using COMSOL Multiplysics to solve directly the problem, a specific tool has been developed. It is composed of a user-friendly interface (I-Simpa) which manipulates all the physical data of the problem (geometries, acoustic properties and elements…) and generates an interoperability script to execute COMSOL Multiplysics via the generation of .m file scripts. Then, numerical results are processed by I-Simpa for the acoustic post-treatment and results display, like sound levels, reverberation times… [less ▲]

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See detailFiscalité des subsides et primes. Certificats Kyoto
Richelle, Isabelle ULg

Conference (2009, October)

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See detailNumerical simulations of the sound propagation in non rectilinear streets
Billon, Alexis ULg; Picaut, Judicaël; Valeau, Vincent et al

Conference (2009, October)

At high frequencies, the sound propagation can be approximated by the propagation of sound particles which are reflected and absorbed at the boundaries. This propagation follows then a transport process ... [more ▼]

At high frequencies, the sound propagation can be approximated by the propagation of sound particles which are reflected and absorbed at the boundaries. This propagation follows then a transport process. In urban canyons, this transport process can be reduced to a diffusion process. The resultant model allows one to obtain the spatial distribution of the acoustical energy in a street in a few seconds using a classical finite elements program. This diffusion model has been previously validated in rectilinear streets for different geometrical and acoustical parameters. In this paper, more complex geometries such as varying cross-sections, bents and streets crossings are dealt with. As the diffusion model only models the reverberated sound field, diffraction effects on the direct sound field at streets corners are added. The obtained results are then compared to scale model experiments. [less ▲]

Detailed reference viewed: 50 (3 ULg)
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See detailMicrofossil evidence for +21 m eustatic sea level during marine isotope stage 11
van Hengstum, P. J.; Scott, Dave; Javaux, Emmanuelle ULg

Conference (2009, October)

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See detailAmphibia-Reptilia: Editorial report 2008-2009
Denoël, Mathieu ULg

Conference (2009, September 30)

Detailed reference viewed: 17 (1 ULg)
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See detailPopulation displacements in a 4°C+ world
Gemenne, François ULg

Conference (2009, September 29)

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailMémoire épisodique et métamémoire dans la variante comportementale de la démence fronto-temporale
Feyers, Dorothée ULg; Bastin, Christine ULg; Collette, Fabienne ULg et al

Conference (2009, September 28)

Impaired memory performance does not constitute the prominent deficit in frontotemporal dementia (FTD). Nevertheless, it has been suggested that some specific aspects of memory may be disrupted in FTD ... [more ▼]

Impaired memory performance does not constitute the prominent deficit in frontotemporal dementia (FTD). Nevertheless, it has been suggested that some specific aspects of memory may be disrupted in FTD patients, in particular, the ability to consciously recollect the context in which information has been learned (Simons et al., 2002). The aims of the current study was to investigate the states of awareness accompanying recognition memory by asking participants to make Remember/Know/Guess judgments. Concretely, 12 FDT patients and 12 matched healthy participants studied 20 word pairs. During cued recall, each trial consisted of one word from a pair and participants had to try to recall the associated word. Finally, a 5-alternative forced-choice recognition task was given and participants had to say whether they chose a word because they recollected the study context (Remember), they knew they saw the word, without recalling anything else (Know) or they guessed (Guess). Results from the cued recall and recognition parts indicated that FTD recalled less word pairs than the controls, but had similar levels of recognition performance. Nevertheless, FTD patients gave less Remember responses than the controls, and tended to give more Guess responses. To conclude, episodic memory performance in FTD was characterised by impaired self-initiated memory retrieval processes. Although global recognition memory performance was preserved, FTD patients’ memories lacked of autonoetic consciousness and were mainly based on familiarity judgments and guessing. This pattern of results is similar to that found in patients with focal frontal lobe lesions (e.g., Wheeler et al., 1995; Wheeler & Stuss, 2003) and is consistent with the idea that the memory dysfunctions observed in FTD may stem from damage to the prefrontal cortex. [less ▲]

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See detailProteomic characterization of a Chlamydomonas reinhardtii mutant lacking the mitochondrial alternative oxidase
Mathy, Grégory ULg

Conference (2009, September 27)

Conférence réalisée sur la carractérisation d'un mutant AOX- chez l'algue unicellulaire Chlamydomonas reinhardtii

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See detailSur les traces des lieux de culte isiaques du Péloponnèse
Veymiers, Richard ULg

Conference (2009, September 25)

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See detailLes technologies textiles : outils de la médecine régénérative
Grandfils, Christian ULg

Conference (2009, September 25)

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See detailThe Paradoxes of Grace: New Impingements on Australian Literary Territory
Delrez, Marc ULg

Conference (2009, September 24)

The title of Robert Drewe’s latest novel, Grace (2005), shares with J. M. Coetzee’s antonymous Disgrace (1999) a polysemous quality which derives from both works’ attempt to capture the ethical stance of ... [more ▼]

The title of Robert Drewe’s latest novel, Grace (2005), shares with J. M. Coetzee’s antonymous Disgrace (1999) a polysemous quality which derives from both works’ attempt to capture the ethical stance of a society in a way which has personal and political ramifications at the same time. The Australian text shows some concern with the predicament of a boatload of asylum seekers from Indonesia, who later escape from their detention centre in the Kimberleys; but Drewe’s progressive denunciation of Australia’s treatment of refugees is potentially compromised by the Australian anxiety over territorial integrity which provides an unshakeable context for this kind of thematic development. More generally, my paper will explore the ambiguities attending a discursive move which seeks to absorb race into larger categories of political meaning, and the related difficulty of achieving the ‘grace’ of complete freedom from colonialist parameters in an Australian culture where some suspense over territory continues to brood. [less ▲]

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See detailSustainable dairy farming - A case study of Holsteins in a developed and an emerging country
Hammami, Hedi ULg; Rekik, Boulbaba; Bormann, Jeanne et al

Conference (2009, September 23)

Sustainability of breeding programs under the flow of exchange among various environments are conditioned by the ability of genotypes to adjust sufficiently their phenotypes in response to changes in ... [more ▼]

Sustainability of breeding programs under the flow of exchange among various environments are conditioned by the ability of genotypes to adjust sufficiently their phenotypes in response to changes in their new bio-physical conditions, and also by the capabilities of farmers to balance between environmental, ethical, social. and economic aspects. The objective of this paper was to quantify the effectiveness of genetic responses from indirect selection in high- and low- to medium- input systems using Luxembourg and Tunisian Hoisteins. The magnitude of genotype-by-environment interaction (GxE) for production traits was firstly investigated based on the country border delimitation as environmental character state. Secondly, three herd management levels reflecting feeding and management intensity were identified in each country and GxE was investigated within and across country environments. Significant GxE was detected for milk yield and persistency with large differences in genetic and permanent environmental variances between the 2 countries. Genetic correlations for 305-d milk yield and persistency between Luxembourg and Tunisia were 0.60 and 0.36. Low rank correlations obtained between estimated breeding values of common sires translated a significant re-ranking between the 2 countries. Within-country environments analysis show that the magnitude of GxE varied from only scaling effects resulting from heterogeneous variances in high-input systems to considerable re-ranking of common sires under limited feeding resources, low management care, and stressful conditions in low-input systems. Overall, this study shows that substantial differences exist between Hoisteins in terms of their sensitivity to production environ ment suspecting the sustainability of the dairying system. In high-input systems, GxE effects are expected to be easily managed but harmful effects of intensive dairy systems should be considered. Selection of breeds under less intensive production systems respecting the ruminant's specificities should be encouraged. In law-input systems, selection for adaptive traits under their specifie conditions and improvement of management conditions and husbandry practices are needed. [less ▲]

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See detailApproches numériques et expérimentales en appui à la gestion durable des sédiments
Dewals, Benjamin ULg

Conference (2009, September 23)

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See detailSteps to implement animal breeding for improved nutritional quality of bovine milk
Gengler, Nicolas ULg; Soyeurt, Hélène ULg

Conference (2009, September 23)

Animal improvement is always directed towards a given selection objective. These objectives in dairy cattle have been changing in the last forty years passing from simple yield only potentially associated ... [more ▼]

Animal improvement is always directed towards a given selection objective. These objectives in dairy cattle have been changing in the last forty years passing from simple yield only potentially associated with type, towards more complex ones including also functional traits as fertility and longevity. Milk composition has been selected too in most countries, however focussing only on major components, fat and protein. During the last years interest in milk quality traits, especially nutritionally quality has been increasing. Implementing breeding for additional traits first requires that animals can be evaluated for them because data is available and they are heritable enough. The objective of our research was to develop the needed steps to implement animal breeding for improved nutritional quality. Until recently data for fatty acid (FA) composition could not be obtained easily. However calibration equations for mid-infrared (MIR) spectrometry data generated in routine milk analysis done during milk recording were developed. They are used in routine in Belgium (Walloon Region) and Luxembourg and generate MIR data used to predict FA for up to 100.000 cows for every test date, therefore up to a maximum of 1 million test-day records. Multivariate test-day models were developed that allow estimating genetic parameters and ultimately breeding values as soon as enough data is available. Daily heritabilities estimated ranged between 0.1 and 0.4 showing that sufficient genetic differences exist. Because of the lack of historical data correlated traits as milk yield, fat and protein content will be analyse together with FA. For the future research on correlations between FA and other economically important traits will be done. Results are needed to integrate FA in the selection objectives. Because of the relative lack of historical data there is a high interest to research using genomic information to provide combined breeding values. [less ▲]

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See detailEnvironmental and genetic sources of variability of stearoyl Coenzyme-A desaturase 9 activity during and across lactations
Arnould, Valérie ULg; Gengler, Nicolas ULg; Soyeurt, Hélène ULg

Conference (2009, September 23)

Milk fatty acid (FA) profile is far from the optimal fat composition in regards to human health. Different natural sources of variation such as feeding or genetics could be used to modify the contents of ... [more ▼]

Milk fatty acid (FA) profile is far from the optimal fat composition in regards to human health. Different natural sources of variation such as feeding or genetics could be used to modify the contents of unsaturated fatty acids. The impact of feeding is well described; however, genetics effects on the milk FA composition are not well studied. Increasing the unsaturated fatty acids contents of bovine milk could have the potential to raise the nutritive and therapeutic values of dairy products. The stearoyl Coenzyme-A desaturase 9 (delta-9) gene was identified as a potential functional candidate gene affecting milk fat composition in dairy cattle. The objective of this research was to study the genetic variability on this enzyme activity across lactations. A total of 199,977 test-day records were obtained from 29,603 Holstein cows in first lactation, 154,267 records from 23,453 Holstein cows in second lactation, and 173,244 records from 75,887 Holstein cows in third and later lactations. The used model was a multiple-trait random regressions test-day model. Fixed effects were: herd x date of test, and class of age. Random effects were: herd x year of calving, permanent environmental, additive genetic, and residual effects. The studied traits were milk yield, protein content, percentage of fat, monounsaturated fatty acids estimated by mid-infrared spectrometry, and the ratios reflecting the delta-9 activity. Obtained heritability estimates of delta-9 as well as the genetic and phenotypic correlations varied across lactations. These results suggest potential improvements of milk fat composition based on delta-9 activity using animal selection and appropriate management practices. [less ▲]

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See detailla pandémie de grippe H1N1, un défi de taille pour le Médecin Généraliste
Burette, Philippe ULg

Conference (2009, September 22)

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See detailHypertension, prévention, traitements et conséquences
Krzesinski, Jean-Marie ULg

Conference (2009, September 22)

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See detailPulse pressure and ambulatory arterial stiffness index (AASI) in patients wit type 1 diabetes
Philips, Jean-Christophe ULg; Marchand, Monique ULg; Saint-Remy, Annie ULg et al

Conference (2009, September 19)

Results of PP and AASI measurements performed during a 24H AMBP recording and a 3 min posture test are not superimposable, but gave complementary information, in a population with type 1 diabetes mellitus ... [more ▼]

Results of PP and AASI measurements performed during a 24H AMBP recording and a 3 min posture test are not superimposable, but gave complementary information, in a population with type 1 diabetes mellitus. Our proof-of-concept study does not support the use of AASI as a cardiovascular risk marker when calculated during a short posture test. [less ▲]

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See detailEfficacité, efficience, qualité : quelle évaluation pour quelle Justice ?
Ficet, Joël ULg

Conference (2009, September 18)

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See detailSynthesis of novel block copolymers by cobalt-mediated radical polymerization (CMRP) and isoprene-assisted radical coupling reaction (I-ARC)
Debuigne, Antoine ULg; Jérôme, Christine ULg; Detrembleur, Christophe ULg

Conference (2009, September 17)

Nowadays, progresses in medicine, biotechnology, microelectronic and many other fields are more and more sustained by the development of novel polymer materials with constantly improved properties and ... [more ▼]

Nowadays, progresses in medicine, biotechnology, microelectronic and many other fields are more and more sustained by the development of novel polymer materials with constantly improved properties and well-defined molecular parameters. In this context, we designed an innovative and very promising tool for macromolecular engineering. This technique, called Isoprene-Assisted Radical Coupling (I-ARC), allows to couple quantitatively polymer chains preformed by Cobalt-Mediated Radical Polymerization (CMRP), an efficient controlled radical polymerization system for vinyl acetate (VAc) and acrylonitrile (AN). Typically, addition of isoprene to well-defined polymers prepared by CMRP invariably leads to the quantitative coupling reaction of the chains, as assessed by the perfect doubling of the molar mass of the polymer. Importantly, the I-ARC reaction is not limited to macromolecules with low molar masses and homopolymers, contrary to the previously reported radical chains coupling methods. Indeed, when applied to diblock copolymers, I-ARC constitutes a straightforward approach for the synthesis of telechelic symmetrical ABA triblock copolymers, as illustrated by the preparation of poly(vinyl acetate)-b-poly(acrylonitrile)-b-poly(vinyl acetate) triblock copolymers and their derivatives. [less ▲]

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See detailPrevalence of hearing voices in the general population
Krakvik, Bodil; Kalhovde, Anne-Martha; Laroi, Frank ULg et al

Conference (2009, September 17)

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See detailThe Mars ultraviolet dayglow variability: SPICAM observations and model comparison
Gérard, Jean-Claude ULg; Cox, Cédric ULg; Bougher, S. W. et al

Conference (2009, September 16)

Limb profiles of the CO Cameron and CO2+ doublet airglow have been observed over different conditions (latitude, season, SZA, F10.7). They have been individually modelled using currently accepted cross ... [more ▼]

Limb profiles of the CO Cameron and CO2+ doublet airglow have been observed over different conditions (latitude, season, SZA, F10.7). They have been individually modelled using currently accepted cross sections, and outputs from the MTGCM. They have been shown to co-vary, with a ICO/ICO2+ ratio of about 4.7, less than the modelled ratio.The peak brightness varies linearly with the F10.7 solar flux proxy, in a way compatible with the Mariner 6 and 7 observations. The intensity of both emissions is overestimated by the model (but large uncertainties exist in excitation cross sections). An increase of the altitude of both emissions has been observed during the 2005 summer season. It is a consequence of the dust load, followed by an increased thermospheric CO2 density observed with SPICAV during the same period. This density enhancement is partly predicted by GCM models. [less ▲]

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See detailTaking into account direct and indirect impacts when measuring the performance of social entreprises
Marée, Michel ULg; Mertens de Wilmars, Sybille ULg

Conference (2009, September 16)

The present article aims to provide a synthetical analysis of the various methods used to measure the non-market dimension of a product. In a first stage, we define the various notions linked to the ... [more ▼]

The present article aims to provide a synthetical analysis of the various methods used to measure the non-market dimension of a product. In a first stage, we define the various notions linked to the dimensions of the production of a "merit good": direct and indirect impacts, externalities, collective impacts, etc. We then envisage the way in which these various dimensions are generally measured in economic literature, and we highlight the advantages and drawbacks of the various methods. We attempt to demonstrate why the method based on the economic value of a non-market production, despite its advantages and its success, raises many methodological, but also, more fundamentally, conceptual questions, which jeopardise the reliability of the estimations produced. As far as the production of social enterprises is concerned, the article will thus make a case for a more classical approach, mainly based on the method of indicators. [less ▲]

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